JP2019101799A - Machining program analysis device, machine tool provided with the same, machining program analysis program and machining program analysis method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining program analysis device capable of accurately specifying a location where a scratch occurs on a machining surface while predicting an analysis time, a machine tool having the machining program analysis program, a machining program analysis program and a machining program analysis method. I will provide a. SOLUTION: A machining path dividing unit 43 that divides a machining path instructed by a machining program into a plurality of adjacent unit machining paths, and a positional relationship between command points forming each of the adjacent unit machining paths. Based on the above, an isolated command point detection unit 46 that detects, as an isolated command point, a command point where adjacent command points are missing in the unit machining paths. [Selection diagram]

Description

  The present invention relates to a processing program analysis device for analyzing a processing program for numerically controlling a machine tool, a machine tool provided with the same, a processing program analysis program, and a processing program analysis method.

  Conventionally, when machining free-form surfaces etc. by numerically controlling a machine tool, as shown in FIG. 23, a machining program including point sequence data (command point sequence) of command points for dividing the machining path into minute line segments is used It is done. This machining program is generated by a CAD / CAM device having a CAD (Computer-Aided Design: Computer Assisted Design) function and a CAM (Computer Aided Manufacturing: Computer Assisted Manufacturing) function along with the complexity of machining contents in recent years. There are many things.

  However, depending on the performance of the CAD / CAM apparatus, as shown in FIG. 24, it is known that the command point sequence included in the generated processing program becomes irregular. When a workpiece is machined by a machining program including such an irregular command point sequence, an error occurs in the machining path, and there is a problem that a trace such as a scratch or a streak remains on the machining surface.

  In order to analyze the quality or problems of the processing program, for example, in JP-A-2004-21954, for each minute line segment of the tool trajectory of the processing program, the positive or negative inclination with respect to the specific axis, or A tool trajectory display method is disclosed that determines 0 and displays end points of micro line segments or micro line segments with different display attributes with respect to each inclination (Japanese Patent Application Laid-Open No. 2008-112118).

JP 2004-21954 A

  However, the command point sequence included in the machining program is merely position coordinates for each command point. For this reason, in the said patent document 1, although the unevenness degree on the processing path with respect to any one specific axis can be identified, there exists a problem that other useful information can not be acquired directly from a processing program.

  For example, if it is possible to analyze information as to what kind of machining surface the workpiece machined by the machining program has, and if it is irregular in the positional relationship with the surrounding command points including the machining path where each command point is adjacent , It is thought that it contributes to the improvement of the quality of processing side. However, conventionally, there is a problem that the above-mentioned information can not be directly obtained from a processing program which does not include information other than position coordinates, and only limited analysis can be performed.

  Therefore, the present inventors calculate a predetermined physical quantity using position coordinates of each command point in Japanese Patent Application No. 2016-248154, and perform cluster analysis on the physical quantity to obtain useful information from the processing program. We propose an analysis method of processing program that can directly obtain various analysis. According to this analysis method, among the command points constituting the command point sequence of the machining program, the command points in the positional relationship with the surrounding command points are specified irregularly, that is, the location where the flaw occurs in the machining surface is specified Can.

  However, since the cluster analysis described above is a kind of so-called unsupervised learning, it is necessary to repeat arithmetic processing until convergence. For this reason, it is difficult to predict the number of operations, and the analysis time required to obtain an appropriate analysis result may be prolonged. In addition, convergence to an inappropriate local solution may result in failure to obtain the expected analysis result. Therefore, the present inventors have been searching for another approach that can identify the location of the flaw on the processed surface without using cluster analysis.

  The present invention has been made based on such background art, and a processing program analysis device capable of specifying with high precision the location where a flaw occurs on a processing surface while the analysis time can be predicted, and It is an object of the present invention to provide a machine tool provided with the above, and a processing program analysis program and a processing program analysis method.

  The machining program analysis apparatus according to the present invention can process a machining path instructed by the machining program in order to solve the problem of precisely specifying the location of a flaw on the machining surface while the analysis time can be predicted. The command points adjacent to each other in the unit machining paths are missing on the basis of the positional relationship between the machining path division unit divided for each of a plurality of adjacent unit machining paths and the command points constituting each of the adjacent unit machining paths And an isolated command point detection unit that detects the commanded point as an isolated command point.

  Further, as one aspect of the present invention, in order to solve the problem of detecting the isolated command point simply and accurately, the isolated command point detection unit is configured to set the first unit processing path and the second unit processing path adjacent to each other. The distance between command points, which is the distance between each of the command points constituting the second unit machining path, is calculated for all the command points constituting the first unit machining path in the 2-unit machining path, and the distance between the command points is calculated. The command point having the shortest distance is specified as the adjacent command point, and among the command points constituting the second unit machining path, the adjacent command points from any command point constituting the first unit machining path A command point not identified as may be detected as the isolated command point.

  Further, as one aspect of the present invention, in order to solve the problem of simply and accurately detecting an isolated command point and shortening an analysis time, the isolated command point detection unit may be the adjacent unit processing path In one unit machining path and second unit machining path, a command from a first start point which is any command point constituting the first unit machining path to a first end point which is a command point behind the first start point From the point distance and any second command point that constitutes the second unit machining path, and from the second start point adjacent to the first start point, to the second end point that is the command point behind the second start point The command point distance between the command points is calculated as the isolated command point if the difference between the command point distances exceeds an arbitrary threshold value, and the command point at which the command distance between the command points is the shorter end point is detected. It is also good.

  Furthermore, as one aspect of the present invention, in order to solve the problem of appropriately dividing the machining path along the outer peripheral surface of the specific three-dimensional object into unit machining paths, the machining program is directed to the command with reference to a certain reference point. In the case of a processing program for processing a specific three-dimensional object having a shape in which points are distributed on the circumference, the processing path division unit averages coordinates obtained by averaging the position coordinates of all command points constituting the processing path. While calculating as an origin, position coordinates of all the command points with respect to the origin may be converted into polar coordinates and divided as the unit machining path for each command point sequence for one rotation.

  In addition, as one aspect of the present invention, in order to solve the problem of appropriately dividing each processing path for processing paths that move only in one direction on the same processing surface in a three-dimensional object other than a specific three-dimensional object If the processing program is a processing program for processing a three-dimensional object other than a specific three-dimensional object whose shape is such that the command points are distributed on the circumference around a certain reference point, the command point sequence of the processing program is For each command point to be configured, a plurality of physical quantities are calculated by performing a cluster analysis on the physical quantities of each command point and a physical quantity calculation unit that calculates a predetermined physical quantity using position coordinates of one or more command points. The processing path division unit further includes a physical quantity classification unit that classifies into a group of Together with extracts, the distance between the front and rear of command points in the processing sequence of the commanded sequence of points may be by dividing the machining path between the command points is not less than a given threshold.

  Furthermore, as one aspect of the present invention, a processing path moving in both directions on the same processing surface in a three-dimensional object other than a specific three-dimensional object, or a change in the movement direction in the same processing surface is small, up to the next command point In order to solve the problem of appropriately dividing each processing path even for a processing path that is folded back due to a long moving distance, the processing program has the command point centered on a certain reference point. In the case of a processing program for processing a three-dimensional object other than a specific three-dimensional object having a distributed shape, position coordinates of one or more command points are used for each command point constituting the command point sequence of the processing program. A physical quantity calculating unit that calculates a predetermined physical quantity, and a physical quantity that classifies the physical quantity into a plurality of groups by performing cluster analysis on the physical quantity of each command point The machining path division unit further extracts a command point sequence belonging to the same processing surface based on the classification result by the physical quantity classification unit, and the front and rear in the processing order of the command point sequence The machining path may be divided between command points in which the direction between command points in the direction changes in the pick feed direction by any threshold or more or the angle between command points before and after changes in the angle by more than the threshold.

  Further, as one aspect of the present invention, in order to solve the problem of detecting isolated command points without omission and further improving the accuracy of analysis, the isolated command point detection unit processes each of the unit processing paths. The isolated command points may be sequentially detected in the forward direction along the direction, and the isolated command points may be sequentially detected in the reverse direction to the forward direction.

  A machine tool according to the present invention includes the machining program analysis device according to any one of the aspects described above.

  Furthermore, in the machining program analysis program according to the present invention, the machining path instructed by the machining program in order to solve the problem that the occurrence position of the flaw on the machining surface is specified with high accuracy while the analysis time can be predicted. Command points adjacent to each other in the unit processing paths based on the positional relationship between the processing path division unit that divides each of the plurality of adjacent unit processing paths and the command points that configure each of the adjacent unit processing paths The computer functions as an isolated command point detection unit that detects a command point having a missing point as an isolated command point.

  In the machining program analysis method according to the present invention, the machining path instructed by the machining program is solved in order to solve the problem that the occurrence position of the flaw on the machining surface can be specified with high accuracy while the analysis time can be predicted. The command points adjacent to each other in the unit machining paths are missing on the basis of the positional relationship between the machining path dividing step of dividing each of a plurality of adjacent unit machining paths and the command points constituting each of the adjacent unit machining paths And an isolated command point detecting step of detecting the commanded point as an isolated command point.

  According to the present invention, while the analysis time can be predicted, it is possible to specify with high precision the location where a flaw occurs on the processed surface.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows 1st Embodiment of the processing program analysis apparatus which concerns on this invention, and a machine tool provided with this. FIG. 7 is a diagram showing an example of an analysis result stored in an analysis result storage unit in the first embodiment. It is a figure showing an example of a specific solid thing in the 1st embodiment of the present invention. It is a figure which shows an example of three-dimensional objects other than a specific three-dimensional object in this 1st Embodiment. FIG. 7 is a diagram showing a method of dividing a processing path of a specific three-dimensional object into unit processing paths in the first embodiment. FIG. 7 is a diagram showing a state in which a machining path of a cylinder is divided into unit machining paths in the first embodiment. FIG. 7 is a view showing a method of dividing a processing path in which an axis for processing the same processing surface moves only in one direction into unit processing paths in the first embodiment. FIG. 7 is a diagram showing a method of dividing a processing path in which an axis for processing the same processing surface moves in both directions into unit processing paths in the first embodiment. In the first embodiment, it is a diagram showing angles between front and back command points in the processing sequence of the command point sequence. FIG. 7 is a diagram showing a method of detecting an isolated command point in the first embodiment. FIG. 7 is a diagram showing a case where an isolated command point is detected in the forward direction along the processing path and a case where an isolated command point is detected in the reverse direction to the forward direction in the first embodiment. . It is a flow chart which shows the processing program method performed by the processing program analysis device and processing program analysis program of a 1st embodiment. It is a flow chart which shows the details of processing course division processing in a 1st embodiment. It is a flow chart which shows the details of isolated command point detection processing in a 1st embodiment of the present invention. FIG. 14 is a diagram illustrating a case where (a) an isolated command point is not detected and (b) a case where an isolated command point is detected in the second embodiment. In the second embodiment, (a) a case where the command point P13 is not detected as an isolation command point, and (b) a case where the command point P13 is detected as an isolation command point. It is a flow chart which shows the details of isolated command point detection processing in a 2nd embodiment of the present invention. It is the (a) top view which shows the processing path | route of the blade processing program made into analysis object in a present Example, (b) Front view, (c) It is a side view. (A) It is a perspective view which shows the analysis result of an Example, and the analysis result of the (b) comparative example. (A) It is a front view which shows the analysis result of an Example, and the analysis result of the (b) comparative example. (A) In the case of dividing the machining path by setting the origin inside the figure formed by the machining path, and (b) setting the origin outside the figure, the machining path Is a diagram in the case of dividing. In a specific three-dimensional object of complicated shape, (a) even if the origin is set inside the figure formed by the machining path, the machining path is cut at multiple locations, and (b) the average coordinate is set as the origin It is a figure at the time of having done. It is a figure which shows the command point which comprises the command point sequence of a processing program, and its processing path. It is a figure which shows the processing path of the processing program which the irregular command point produced.

  Hereinafter, a first embodiment of a machining program analysis device according to the present invention, a machine tool including the machining program analysis program, and a machining program analysis program and a machining program analysis method will be described with reference to the drawings.

  The machining program analysis device 1 of the first embodiment is for analyzing a machining program for numerically controlling the machine tool 10, and is configured by a numerical controller capable of computer numerical control (CNC: Computer Numerical Control). It is done. Then, the machine tool 10 is controlled based on the machining program, and the workpiece (object to be machined) is machined. Each component will be described in detail below.

  The machine tool 10 cuts, punches, grinds, grinds, rolls, etc. a workpiece such as metal, wood, stone, resin, etc., such as a lathe, drilling machine, boring machine, milling machine, gearing machine, grinding machine, etc. It is a machine for performing various processes such as forging and bending. In the first embodiment, the machine tool 10 is provided in the processing program analysis device 1 and is numerically controlled based on the analyzed processing program.

  As shown in FIG. 1, the processing program analysis apparatus 1 mainly stores display input means 2 for inputting data and displaying analysis results, and stores the processing program analysis program 1a of the first embodiment and various data. Operation which executes various operation processes by executing the storage unit 3 functioning as a working area when the operation processing unit 4 performs various processes and the processing program analysis program 1a installed in the storage unit 3 It comprises the processing means 4. Each component will be described in detail below.

  In the first embodiment, the processing program analysis device 1 is configured by the numerical control device, but the present invention is not limited to this configuration. For example, the processing program analysis function according to the present invention is mounted on a general computer such as a personal computer, a tablet terminal or a smartphone, or a special computer such as the CAD / CAM device described above, and configured as a processing program analysis device 1 It is also good.

  The display input means 2 is configured by a touch panel or the like, and has both an input function and a display function. In the first embodiment, the display input means 2 has an input function for receiving the type and the like of the processing object described later, and a display function for displaying the analysis result and the like of the processing program. In the first embodiment, the display input means 2 having both the display function and the input function is used. However, the present invention is not limited to this configuration, and a display means such as a liquid crystal display having only the display function. , And an input unit such as a keyboard or a mouse having only an input function may be separately provided.

  The storage unit 3 includes a hard disk, a read only memory (ROM), a random access memory (RAM), a flash memory, and the like, and stores various data and a working area when the processing unit 4 performs various processing. Function as In the first embodiment, as shown in FIG. 1, the storage unit 3 includes an analysis program storage unit 31, a processing program storage unit 32, and an analysis result storage unit 33.

  In the analysis program storage unit 31, a processing program analysis program 1a for controlling the processing program analysis device 1 of the first embodiment is installed. Then, the arithmetic processing means 4 causes the computer as the processing program analysis device 1 to function as each component described later by executing the processing program analysis program 1a.

  The use form of the processing program analysis program 1a is not limited to the above configuration. For example, the processing program analysis program 1a may be stored in a non-transitory recording medium readable by a computer, such as a CD-ROM or a USB memory, and read directly from the recording medium and executed. Also, it may be used from an external server or the like by a cloud computing method or an ASP (Application Service Provider) method.

  The machining program storage unit 32 stores a machining program to be analyzed. In the first embodiment, the machining program is for numerically controlling various machine tools 10, and is generated by a CAD / CAM device. Further, in the processing program, position coordinates of each command point that divides the processing path into minute line segments are included as a command point sequence in association with the line number.

  The analysis result storage unit 33 stores an analysis result of the processing program. In the first embodiment, as shown in FIG. 2, the analysis result storage unit 33 is configured in a data table format. Then, for each command point constituting the command point sequence of the machining program, the command point number sequentially shaken along the machining direction, and the position coordinates represented by the coordinate values of the X axis, Y axis and Z axis The unit machining path number divided by the machining path division unit 43 described later and the isolated command point detected by the isolated command point detection unit 46 described later are stored.

  In the first embodiment, when analyzing a processing program for processing a three-dimensional object other than a specific three-dimensional object described later, as shown in FIG. 2, the analysis result storage unit 33 includes a physical quantity calculation unit described later. The physical quantity calculated by 44 and the group number of the group classified by the physical quantity classification unit 45 described later are separately stored. In the example shown in FIG. 2, the value “1” is assigned only to the command point which is the isolated command point.

  Next, the arithmetic processing means 4 is constituted by a CPU (Central Processing Unit) or the like, and by executing the processing program analysis program 1a installed in the storage means 3, as shown in FIG. It functions as a unit 41, an object type acquisition unit 42, a processing path division unit 43, a physical quantity calculation unit 44, a physical quantity classification unit 45, and an isolated command point detection unit 46. Hereinafter, each component of the arithmetic processing means 4 will be described in more detail.

  The command point acquisition unit 41 acquires a command point from the processing program. In the first embodiment, the command point acquisition unit 41 reads the machining program from the machining program storage unit 32, acquires the position coordinates of each command point constituting the machining path instructed by the machining program, and analyzes the analysis result. It is made to memorize in storage part 33 one by one.

  The object type acquisition unit 42 acquires the type of the processing object. In the first embodiment, the object type acquisition unit 42 selects whether the processing object to be processed by the processing program is a specific three-dimensional object described later or a three-dimensional object other than the specific three-dimensional object. The selected type is provided to the processing path division unit 43 through the display input means 2.

  The processing path division unit 43 divides the processing path instructed by the processing program into a plurality of adjacent unit processing paths. In the first embodiment, the processing path division unit 43 divides the processing path into predetermined unit processing paths according to the type of the processing target. Then, a sequential unit machining path number is attached to each of the divided command points constituting each unit machining path along the machining direction, and is stored in the analysis result storage unit 33. The details will be described below.

  The object to be processed by the processing program has various shapes. Therefore, in the first embodiment, the processing target is roughly divided into two types: a specific three-dimensional object having a shape in which the command points are distributed on the circumference around a certain reference point and a three-dimensional object other than the specific three-dimensional object. did. And according to the kind, processing path was divided into unit processing path by a different method.

  In the present invention, "on the circumference" is not limited to the circumference, but is a concept including the circumference of a closed curve or a broken line surrounding an arbitrary figure. For this reason, as the specific three-dimensional object, there is a shape in which the command points are distributed on the circumference around a certain reference point, such as a cylinder, a triangular prism and a quadrangular prism as shown in FIG. Includes all three-dimensional objects provided. On the other hand, as three-dimensional objects other than the specific three-dimensional object, all three-dimensional objects having an arbitrary shape such as a mold as shown in FIG. included.

  Hereinafter, the processing by the processing path division unit 43 is divided into a case where the processing program is a processing program for processing a specific three-dimensional object and a processing program for processing a three-dimensional object other than the specific three-dimensional object. The route division method will be described.

  If the type acquired by the object type acquisition unit 42 is a specific three-dimensional object, the processing path division unit 43 firstly detects the position coordinates of all the command points that constitute the processing path, as shown in FIG. 5. Calculate the averaged average coordinates as the origin. Next, the machining path division unit 43 converts position coordinates of all command points into polar coordinates with respect to the calculated origin (average coordinate). Thereby, the position coordinate of each command point is an angle formed by a straight line connecting the origin and the command point with respect to the radius coordinate r (the distance from the origin to the command point) and the declination coordinate φ (any start line) And is represented.

  Then, the machining path division unit 43 divides each time the deflection angle φ rotates 360 degrees (2π) from the first command point, that is, divides it as a unit machining path for each command point sequence for one rotation. Thereby, for example, when the specific three-dimensional object is a cylinder, as shown in FIG. 6, the machining path continuously connected in a spiral along the outer peripheral surface of the cylinder is divided for each turn of the command point sequence, Each point sequence is grouped as a unit processing path.

  On the other hand, when the type acquired by the object type acquisition unit 42 is a three-dimensional object other than the specific three-dimensional object, the processing path can not be simply divided because the shape of the three-dimensional object is complicated. Therefore, in the first embodiment, using functional units equivalent to the physical quantity calculation unit 44 and the physical quantity classification unit 45 in Japanese Patent Application No. 2016-248154 devised by the present inventors, the processing surface of a three-dimensional object is used. After extracting the command point sequence belonging to the same machining surface, the machining path is divided.

  Specifically, the physical quantity calculation unit 44 calculates a physical quantity for each command point. In the first embodiment, the physical quantity calculation unit 44 reads out the position coordinates of each command point acquired by the command point acquisition unit 41 from the analysis result storage unit 33, and at least one or more used for analysis of the processing program. The definition equation corresponding to the physical quantity is read out from the storage means 3. Then, the physical quantity calculation unit 44 calculates physical quantities for each command point using position coordinates of one or a plurality of command points based on the read definition equation, and stores the physical quantity in the analysis result storage unit 33. There is.

  In the first embodiment, the physical quantity is a concept that expresses the property of a physical system and includes the measurement method and all quantities in which a unit of the size is defined. Further, as the definition formula according to the first embodiment, physical quantities calculated using position coordinates of one or a plurality of command points are defined for each command point constituting the command point sequence of the machining program.

Specifically, the movement amount defined by the following formula (1), the angle defined by the following formula (2), or the curvature radius defined by the following formula (3) can be used. Then, as the definition formula for calculating the physical quantity, definition formulas such as the following formulas (1) to (3) are registered in the storage unit 3 in advance.
V _i = P _{i + 1} −P _i-1 Equation (1)
However, each code represents the following.
i: command point number P _i : position coordinate of i-th command point V _i : movement amount of i-th command point θ _i : angle of i-th command point ρ _i : i-th command point the radius of curvature _{c 1: P i, P i} + 1 of the n-th order polynomial approximating the curve representing the movement between the first-order coefficient of the term c _{2: P i,} n-th order polynomial approximating the curve representing the movement between _{P i + 1} 2nd order coefficient

  The physical quantity classification unit 45 classifies the physical quantities into a plurality of groups by performing cluster analysis on the physical quantities at each command point. In the present invention, cluster analysis corresponds to so-called non-hierarchical cluster analysis. Specifically, the number of groups to be classified is determined in advance, those having similar properties are classified into the same group, and the other groups are classified into different groups, thereby grouping into predetermined group numbers. It is.

  Therefore, in the first embodiment, the physical quantity classification unit 45 reads the physical quantity of each command point calculated by the physical quantity calculation unit 44 from the analysis result storage unit 33, and sets the number of each command point so as to be an arbitrary number of groups. Cluster analysis and classification of physical quantities. Then, the physical quantity classification unit 45 stores the group number obtained as the classification result in the analysis result storage unit 33 in association with the physical quantity of each command point. Thereby, the same group number is given to the command point sequence which belongs to the same processing surface.

  The algorithm used for cluster analysis is preferably the K-means method (K-average method) from the viewpoint of calculation time and analysis accuracy, but it is not particularly limited as long as it is a method capable of grouping physical quantities. Other clustering algorithms may be used. Further, in the first embodiment, the number of groups (number of clusters) in cluster analysis of physical quantities at each command point varies depending on the physical quantities used for analysis, the shape of the processing object, etc. A desired number of groups can be set.

  After the command point sequence belonging to the same machining surface is extracted by the physical quantity calculation unit 44 and the physical quantity classification unit 45 described above, the machining path division unit 43 sets a plurality of adjacent processing paths distributed on the same machining plane. Divide for each processing path. However, as shown in FIG. 7, the movement direction of the axis for processing the same machined surface has two patterns, the case of moving only in one direction and the case of moving in both directions as shown in FIG. . Therefore, we have devised a method capable of appropriately dividing the processing path into unit processing paths regardless of which pattern is used.

  Specifically, the processing path division unit 43 first refers to the analysis result storage unit 33 in which the classification result by the physical quantity classification unit 45 is stored, and extracts the command point sequence to which the same group number is given. Then, the processing path division unit 43 divides the processing path between command points whose distance between the preceding and succeeding command points in the processing order of the extracted command point sequence is equal to or larger than an arbitrary threshold value. Thereby, as shown in FIG. 7, in the processing path which moves only in one direction, the processing path is divided at the place where the movement distance changes rapidly.

  Further, the processing path division unit 43 divides the processing path between command points in which the direction between the front and back command points in the processing sequence of the extracted command point sequence has changed in the pick feed direction to an arbitrary threshold or more. Specifically, the processing path division unit 43 calculates the processing vector between each command point using the position coordinates of each command point, and the processing vector is equal to or more than an arbitrary threshold in the pick feed direction perpendicular to the processing path. Detects changing points. Thereby, as shown in FIG. 8, in the processing path which moves in both directions, the processing path is divided at the place where the moving direction changes rapidly.

Furthermore, the processing path division unit 43 divides the processing path between command points in which the angle between the preceding and subsequent command points in the processing order of the extracted command point sequence has changed to an arbitrary threshold value or more. Specifically, the machining path dividing unit 43, as shown in FIG. 9, with respect to the processing path connecting the i-1 th command point P _i-1 and i-th command point P _i, i-th The angle formed by the processing path connecting the command point _Pi and the (i + 1) -th command point _{Pi + 1} is calculated using the above equation (2), and a portion where the angle is equal to or greater than an arbitrary threshold value is detected. As a result, the movement path which is small in change of the movement direction and is folded back due to the long movement distance to the next command point is also divided.

  As described above, when the processing path is divided for each unit processing path, the processing path division unit 43 assigns sequential unit processing path numbers to each unit processing path in accordance with the processing order. Thereby, as shown in FIG. 2, the same unit machining path number is stored in the analysis result storage unit 33 for each of the command points belonging to the same unit machining path.

  The isolated command point detection unit 46 detects, as isolated command points, command points in which adjacent command points in unit machining paths are missing, based on the positional relationship between the command points constituting each of the adjacent unit machining paths. It is a thing. Specifically, the isolated command point detection unit 46 first refers to the unit machining path number stored in the analysis result storage unit 33, and the first unit machining path and the second unit machining which are adjacent unit machining paths Extract the route.

  Next, as shown in FIG. 10, the isolated command point detection unit 46 performs, for the first unit processing path and the second unit processing path adjacent to each other, the second command processing for all the command points constituting the first unit processing path. The distance between command points with each command point constituting the unit machining path is calculated. Then, the command point having the shortest distance between the command points is specified as the adjacent command point. In the example shown in FIG. 10, for the command point P11 of the first unit machining path, the command point P21 of the second unit machining path is an adjacent command point, and for the command point P12 of the first unit machining path, the second unit machining The command point P22 of the path is the adjacent command point, and the command point P24 of the second unit processing path is the adjacent command point for the command point P13 of the first unit machining path.

  As described above, after specifying adjacent command points for all command points constituting the first unit machining path, the isolated command point detection unit 46 selects the first command point of the second unit machining paths. If there is a command point not identified as an adjacent command point from any command point constituting a unit machining path, the command point is a command point where a command point adjacent to each other in the unit machining path is missing, so isolated Detect as a command point. In the example shown in FIG. 10, the command point P23 of the second unit machining path is not identified as an adjacent command point from any command point constituting the first unit machining path, and therefore, is detected as an isolated command point. Then, the analysis result storage unit 33 stores that the detected command point is an isolated command point.

  As described above, isolated command points existing in the processing program to be analyzed are almost detected by specifying adjacent command points for all command points belonging to all unit machining paths. However, in the first embodiment, the isolated command point detection unit 46 sequentially detects isolated command points in the forward direction along the processing direction for each unit processing path. Specifically, first, the unit machining path numbers 1 and 2 are used as the first unit machining path and the second unit machining path, respectively, and then the unit machining path numbers 2 and 3 are The unit processing paths are respectively referred to as a first unit processing path and a second unit processing path, and so on.

  However, as described above, when the isolated command point is searched only in one direction, as shown in FIG. 11A, when the command point is missing in the unit processing path on the front side of the direction, the unit on the rear side Although the isolated command point is detected in the processing path, when the command point is missing in the unit processing path on the rear side, the command point on the front side is not detected as the isolated command point.

  Therefore, in the first embodiment, the isolated command point detection unit 46 sequentially detects the isolated command points in the forward direction along the processing direction for each unit processing path, and also in the reverse direction to the forward direction. It is designed to sequentially detect isolated command points. For example, in the example shown in FIG. 11 (b), first, the unit machining path numbers 5 and 4 are respectively taken as the first unit machining path and the second unit machining path, and then the unit machining path number The fourth and third unit machining paths are respectively taken as a first unit machining path and a second unit machining path, and so on. Thereby, isolated command points that are not detected only by the search in the forward direction are detected without omission. In addition, in FIG. 11, the solid-line arrow points to the adjacent command point of the command point of the proximal end.

  Next, the workings of the processing program analysis apparatus 1 according to the first embodiment and the machine tool 10 including the same, and the functions of the processing program analysis program 1a and the processing program analysis method will be described with reference to FIGS.

  When the machining program is analyzed by the machining program analysis device 1 of the first embodiment, first, the command point acquisition unit 41 configures a command point sequence from the machining program to be analyzed in the machining program storage unit 32. Is acquired (step S1). As a result, as shown in FIG. 2, the position coordinates of each command point are stored in the analysis result storage unit 33.

  Next, when the object type acquisition unit 42 acquires the type of the processing object according to the processing program according to the selection operation of the operator via the display input means 2 (step S2), the processing path according to the type The dividing unit 43 divides the machining path for each of a plurality of adjacent unit machining paths (step S3: machining path division step). Hereinafter, the processing path division processing according to the present step S3 will be described with reference to FIG.

  In the processing path division step, as shown in FIG. 13, when the type of the processing object acquired by the object type acquisition unit 42 is a specific three-dimensional object (step S11: YES), the processing path division unit 43 First, an average coordinate obtained by averaging the position coordinates of all the command points constituting the machining path is calculated as the origin (step S12).

  Next, the processing path division unit 43 converts position coordinates of all command points into polar coordinates with respect to the calculated origin (average coordinate) (step S13). Thereby, for each command point distributed on the circumference centering on the origin, the declination around the origin is calculated. Then, the processing path division unit 43 divides the instruction point sequence for one rotation as a unit processing path (step S14). Thus, the processing path along the outer peripheral surface of the specific three-dimensional object is divided into one command point sequence for one rotation, and each of the command point sequence is grouped as a unit processing path. When the machining path is divided into unit machining paths, the process returns to the process of FIG.

  On the other hand, when the type of the processing object acquired by the object type acquisition unit 42 is a three-dimensional object other than the specific three-dimensional object (step S11: NO), first, the physical quantity calculation unit 44 calculates an arbitrary command point. The physical quantity is calculated (step S15). Thereby, as shown in FIG. 2, one physical quantity or two or more physical quantity groups are stored in the analysis result storage unit 33 for each command point.

  Next, the physical quantity classification unit 45 classifies the physical quantities (groups) into a plurality of groups by performing cluster analysis on the physical quantities (groups) calculated in step S15 (step S16). Thereby, as shown in FIG. 2, the same group number is given to the command point to which the physical quantity (group) is similar, and the different group number is given to the command point to which the physical quantity is not similar. For this reason, it is identified that the command point sequence classified into the same group number is a command point sequence belonging to the same machining surface.

  Subsequently, the processing path division unit 43 extracts a command point sequence belonging to the same processing surface based on the classification result by the physical quantity classification unit 45 (step S17). Thus, among the entire processing paths, processing paths which can be easily divided for each unit processing path are partially extracted. Then, the processing path division unit 43 divides the processing path between the command points whose distance between the preceding and succeeding command points is equal to or more than an arbitrary threshold value in the extracted command point sequence (step S18). As a result, with regard to a processing path that moves only in one direction on the same processing surface in a three-dimensional object other than the specific three-dimensional object, the processing path is divided at the place where the movement distance changes rapidly It is divided into each.

  In addition, the machining path division unit 43 divides the machining path between the command points whose direction between the front and rear command points in the pick feed direction has changed to an arbitrary threshold or more in the command point sequence extracted in step S17 (step S19). As a result, the machining path is divided at the location where the movement direction changes rapidly even for machining paths that move in both directions on the same machining surface in a three-dimensional object other than the specific three-dimensional object, so each unit machining path appropriately Divided into

  Furthermore, the processing path division unit 43 divides the processing path between command points in which the angle between the preceding and subsequent command points has changed to an arbitrary threshold value or more with respect to the command point sequence extracted in step S17 (step S20). Thereby, a change in the movement direction on the same machining surface is small, and a machining path which is folded back due to a long movement distance to the next command point is appropriately divided for each unit machining path.

  As described above, when the machining paths in all the machining surfaces identified in step S16 are divided for each unit machining path, the process returns to the process of FIG. Subsequently, the isolated command point detection unit 46 detects an isolated command point on the basis of the positional relationship between the command points constituting each of the adjacent unit processing paths (step S4: isolated command point detection step). Hereinafter, the isolated command point detection process according to step S4 will be described with reference to FIG.

  In the isolated command point detection step, as shown in FIG. 14, after the isolated command point detection unit 46 initializes the parameter i indicating the order of the unit machining path (unit machining path number) to 1 (step S21), The command point having the shortest command point distance with each command point of the (i + 1) th unit machining path is specified as the adjacent command point for all the command points constituting the th unit machining path (step S22). Thereby, adjacent command points in the adjacent unit processing paths are specified for all the command points constituting an arbitrary unit processing path.

  Next, the isolated command point detection unit 46 detects a command point that has not been identified as an adjacent command point as an isolated command point among the command points that constitute the (i + 1) th unit machining path (step S23). As a result, in the adjacent unit processing paths, the command points where the adjacent command points are missing are detected as isolated command points.

  Thereafter, the isolated command point detection unit 46 increments the parameter i and selects a unit machining path having the next machining order (step S24). Then, as long as the parameter i does not match the total number (M) of unit machining paths (step S25: NO), the processing from step S22 to step S24 is repeated, and isolated command points in all unit machining paths are detected. As a result, isolated command points are sequentially and conveniently detected in the forward direction along the processing direction.

  On the other hand, when the parameter i reaches the total number (M) of unit machining paths (step S25: YES), the isolated command point detection unit 46 determines the i-1st for all command points constituting the i-th unit machining path. A command point having a shortest distance between command points with each command point of the unit machining path is specified as an adjacent command point (step S26). Thus, the detection process is performed in the reverse direction to the forward direction along the processing direction.

  Next, the isolated command point detection unit 46 detects a command point that has not been identified as an adjacent command point, as an isolated command point, among the command points constituting the (i−1) th unit machining path (step S27). As a result, in the unit machining paths adjacent in the reverse direction, command points where adjacent command points are missing are detected as isolated command points.

  After that, the isolated command point detection unit 46 decrements the parameter i and selects a unit machining path one machining order earlier (step S28). Then, as long as the parameter i does not match the initial value (1) (step S29: NO), the processing from step S26 to step S28 is repeated, and isolated command points in all unit processing paths are detected. As a result, isolated command points are detected sequentially and simply in the reverse direction to the forward direction along the processing direction. Therefore, isolated command points that are not detected only by forward search are also detected without omission, and analysis accuracy is improved.

  On the other hand, when the parameter i reaches the initial value (1) (step S29: YES), the isolated command point detection step (step S4) in FIG. 12 is completed, and the analysis processing of the machining program ends. By the above-described analysis processing, isolated command points which become the occurrence locations of flaws on the machining surface are identified with high accuracy.

  In the first embodiment, in the case of analyzing a machining path having M unit machining paths consisting of N command points, adjacent unit machining for all command points (N) constituting one unit machining path In order to calculate the distance between the command points with all the command points (N) constituting the path and repeat the calculation by a number (M-1) smaller than the total number of unit machining paths, the total number of operations is N × N × ( It is easily calculated that it is M-1) times. Therefore, analysis time can be predicted, and analysis can be performed efficiently.

According to the first embodiment as described above, the following effects can be obtained.
1. While the analysis time can be predicted, it is possible to pinpoint the location of the flaw on the machining surface with high accuracy.
2. It is possible to simply and accurately detect an isolated command point which is a generation point of a flaw on a machining surface.
3. The processing path along the outer peripheral surface of the specific three-dimensional object can be divided appropriately for each unit processing path.
4. The processing path which moves only in one direction on the same processing surface in a three-dimensional object other than the specific three-dimensional object can also be divided appropriately for each unit processing path.
5. The processing paths that move in both directions on the same processing surface in a three-dimensional object other than the specific three-dimensional object can also be divided appropriately for each unit processing path.
6. Even for processing paths that are small due to a small change in movement direction on the same processing surface in a three-dimensional object other than a specific three-dimensional object, and are folded back due to a long movement distance to the next command point It can be divided.
7. By searching the isolated command point in both the forward direction and the reverse direction along the processing direction, it is possible to detect the isolated command point without omission and to further improve the analysis accuracy.

  Next, a second embodiment of a machining program analysis device 1 according to the present invention, a machine tool 10 including the same, and a machining program analysis program 1a and a machining program analysis method will be described. In the configuration of the second embodiment, the same or corresponding components as or to those of the first embodiment described above are designated by the same reference numerals and the description thereof will not be repeated.

  The feature of the second embodiment is that the isolated command point detection unit 46 detects the isolated command point by a method different from that of the above-described first embodiment. That is, the isolated command point detection unit 46 compares the distance between two command points in one of the adjacent unit processing paths with the distance between two corresponding command points in the other unit processing path, and A point with a large difference is found to detect an isolated command point. Hereinafter, the process of the isolated command point detection unit 46 in the second embodiment will be specifically described.

  In the second embodiment, first, as shown in FIG. 15A, the isolated command point detection unit 46 sets the first unit in the first unit machining path and the second unit machining path, which are adjacent unit machining paths. A distance between command points from a first start point, which is one of the command points constituting the machining path, to a first end point, which is a command point behind the first start point, is calculated.

  Next, as shown in FIG. 15A, the isolated command point detection unit 46 is one of the command points constituting the second unit processing path, and from the second start point adjacent to the first start point, the second command start point 2 Calculate the distance between command points to the second end point which is a command point behind the start point. Then, if the difference between the distance between the command points in the first unit machining path and the distance between the command points in the second unit machining path exceeds an arbitrary threshold, the isolated command point detection unit 46 selects the one with a short distance between the command points. The command point which is the end point of is detected as an isolated command point.

In the example shown in FIG. 15 (a), the command point distance _{L A12} from the first starting point P11 on the first unit processing path until the first end point P12, the second unit processing path adjacent to the first starting point P11 of the difference between the command point distance _{L B12} from the second start point P21 to the second end point P22 is less than or equal to any threshold value _{Δ (| L A12 -L B12 |} ≦ Δ). Therefore, the first end point P12 and the second end point P22 are aligned between adjacent unit processing paths, and the adjacent command points are not missing.

On the other hand, in the example shown in FIG. 15 (b), the command point distance _{L A23} from the first starting point P12 on the first unit processing path until the first end point P13, the second start point P22 on the second unit machining path the difference between the command point distance _{L B23} to the second end point P23 exceeds the arbitrary threshold _{Δ (| L A23 -L B23 |} > Δ). In this case, at the end point (second end point P23) of the smaller inter-command-point distance _LB23 among the inter-command-point distances to be compared, there are no adjacent command points on adjacent unit processing paths. Therefore, the end point is detected as an isolated command point.

In the example shown in FIG. 15B, the end point (first end point P13) of the longer inter-command point distance _LA23 among the inter-command point distances to be compared is separately an isolated command point. It is necessary to determine if there is any. Therefore, the isolated command point detection unit 46 skips the second end point P23 detected as an isolated command point in the second unit machining path, and sets the next command point P24 as a new second end point. Then, the command point distance _{L A23} from the first starting point P12 on the first unit processing path until the first end point P13, between command points from the second start point P22 on the second unit processing path to a second end point P24 distance It is determined whether the difference from L _B24 exceeds an arbitrary threshold Δ.

As a result of the determination, as shown in FIG. 16A, when the difference between the command point distances is less than an arbitrary threshold (| _{LA23- LB24} | ≦ Δ), the first end point P13 and the second end point P24 Are aligned between adjacent unit processing paths, and adjacent command points are not missing. For this reason, the isolated command point detection unit 46 does not detect the isolated command point.

On the other hand, as a result of the above determination, as shown in FIG. 16 (b), when the difference in distance between command points exceeds an arbitrary threshold (| _{LA23- LB24} |> Δ), the command to be compared is Of the inter-point distances, at the end point (first end point P13) of the shorter inter-command point distance _LA23 , there are no adjacent command points on adjacent unit processing paths. Therefore, the end point is detected as an isolated command point.

  Next, among the operations of the processing program analysis apparatus 1 of the second embodiment and the machine tool 10 including the same, and the functions of the processing program analysis program 1a and the processing program analysis method, the isolated command point detection step in FIG. Will be described with reference to FIG.

  In the second embodiment, first, as shown in FIG. 17, the isolated command point detection unit 46 initializes a parameter i indicating the order of unit processing paths (unit processing path number) to 1 (step S31). Next, the isolated command point detection unit 46 generates a parameter j indicating a command point number serving as a start point in the i-th unit machining path and a parameter k indicating a command point number serving as a start point in the i + 1th unit machining path. It is initialized to 1 (step S32). Thus, among the command points constituting each unit processing path, analysis is sequentially performed from the first command point in the processing order. In the present process, it is premised that first command points in adjacent unit processing paths are adjacent to each other.

  Furthermore, isolated command point detection unit 46 has a parameter m indicating the number of command points from the start point of the end point in the i-th unit machining path, and a parameter n indicating the number of command points from the start point of the end point in the i + 1th unit machining path Each is initialized to 1 (step S33). Then, the isolated command point detection unit 46 determines whether the command point number (j + m) of the end point in the i-th unit machining path exceeds the total number A of command points of the i-th unit machining path, It is determined whether the command point number (k + n) of the end point in the (i + 1) th unit machining path exceeds the total number B of command points in the (i + 1) th unit machining path (step S34).

  As a result of the determination, when the command point number (j + m) of the end point in the i-th unit machining path exceeds the total number A of command points in the i-th unit machining path, or the end point in the i + 1th unit machining path If the command point number (k + n) exceeds the total number B of command points of the (i + 1) th unit machining path (step S34: YES), the process proceeds to step S44 described later.

On the other hand, as a result of the determination in step S34, the commanded point number (j + m) of the end point in the i-th unit machining path is less than or equal to the total number A of commanded points in the i-th unit machining path, and the i + 1th unit machining path When the commanded point number (k + n) of the end point in the step is less than or equal to the total number B of commanded points in the (i + 1) th unit machining path (step S34: NO), the isolated command point detection unit 46 detects the i-th unit machining path calculated from 1 start point _{P j} in the first end point _{P j +} distance between command points to _{m L a,} and the distance _{L B} from the second starting point _{P k} in the (i + 1) th unit machining path until the second end point _{P k + n} (step S35 ). Then, the isolated command point detection unit 46, the difference in the distance between the command points _(| L A _-L B |) is equal to or less than a given threshold (step S36).

As a result of the determination, when the difference between the command point distances is within an arbitrary threshold (step S36: YES), adjacent command points exist in the i-th unit machining path and the i + 1-th unit machining path It can be said that Therefore, the isolated command point detection unit 46 changes each of the first starting point P _{j in} the i-th unit machining path and the second starting point P _k in the (i + 1) -th unit machining path (step S37).

Specifically, the isolated command point detection unit 46 substitutes the command point number (j + m) of the first end point P _{j + m} in the i-th unit machining path into the parameter j to obtain the first end point P _{j + m up} to that point. A new first starting point P _j in the i-th unit machining path is used. Similarly, the isolated command point detection unit 46 substitutes the command point number (k + n) of the second end point P _{k + n in} the (i + 1) -th unit machining path for the parameter k, thereby making the second end point P _{k + n} so far i + 1 th As a new second starting point P _k in the unit machining path of As a result, when the command points that are the end points of the adjacent unit processing paths are aligned, each command point is set as a new start point. In addition, after the new starting point is set, the process from step S33 is repeated.

On the other hand, as a result of the determination in step S36, when the difference between the command point distances exceeds an arbitrary threshold (step S36: NO), isolated command point detection unit 46 determines the distance L between command points in the i-th unit machining path _{It is determined which of A} and the distance L _{B in} the (i + 1) -th unit machining path is larger (step S38).

As a result of the determination, if the direction of i-th unit between command points in the processing path distance L _A is smaller (Step S38: YES), with respect to the first end point P _{j + m} in the i-th unit processing pathway, i + 1-th unit processing It can be said that adjacent command points are missing in the route. Therefore, the isolated command point detection unit 46 detects the first end point P _{j + m} as an isolated command point (step S39). Then, by incrementing the parameter m, the first end point P _{j + m} in the i-th unit machining path is changed to a command point one back (step S40), and the process proceeds to step S43.

Similarly, the result of the judgment in the step S38, the case towards the distance _{L B} in the (i + 1) th unit machining path is small (step S38: NO), the (i + 1) th unit processing path for the second end point _{P k + n,} i-th It can be said that adjacent command points are missing in the unit processing path. Therefore, the isolated command point detection unit 46 detects the second end point P _{k + n} as an isolated command point (step S41). Then, by incrementing the parameter n, the second end point P _{k + n} in the (i + 1) th unit machining path is changed to a command point one back (step S42), and the process proceeds to step S43.

  As described above, in the unit machining path in which the isolated command point is detected, the isolated command point is skipped without changing the start point, and the rear command point is sequentially set as a new end point.

  When the end point in any of the unit machining paths is changed (step S40 or step S42), the isolated command point detection unit 46, in the same manner as step S34, the command point number of the end point after the change and each unit machining The total number in the route is compared (step S43). And the command point number (j + m) of the end point after change in the i-th unit machining path is less than or equal to the total number A of command points in the i-th unit machining path, and after the change in the i + 1th unit machining path As long as the command point number (k + n) of the end point is less than or equal to the total number B of command points of the (i + 1) th unit machining path (step S43: NO), the process returns to step S35 and the subsequent processing is repeated.

  On the other hand, as a result of the determination in step S43, if the command point number (j + m) of the end point after change in the i-th unit machining path exceeds the total number A of command points of the i-th unit machining path, or the i + 1 th When the commanded point number (k + n) of the end point after change in the unit machining path in the above exceeds the total number B of commanded points in the (i + 1) th unit machining path (step S43: YES), the isolated command point detection unit 46 The parameter i is incremented, and the next unit machining path is selected (step S44).

  Finally, isolated command point detection unit 46 determines whether or not the incremented parameter i has reached the total number (M) of unit machining paths (step S45). Then, as long as the parameter i does not reach the total number (M) of unit machining paths (step S45: NO), the process returns to step S32 described above, and the subsequent processes are repeated. Thereby, based on the positional relationship of each command point which comprises each of an adjacent unit processing path, the command point which the command point adjacent to each other in a unit processing path is missing is detected as an isolated command point one by one.

  According to the processing program analysis apparatus 1 of the second embodiment as described above, the machine tool 10 including the same, and the processing program analysis program 1a and the processing program analysis method, the same effects as those of the first embodiment described above Play.

  Further, according to the second embodiment, when a machining path having M unit machining paths consisting of N command points is analyzed, all command points (N corresponding to two adjacent unit machining paths) are analyzed. To calculate the distance between N-1 command points existing between them and repeat the calculation by a number (M-1) less than the total number of unit machining paths, so the total number of operations is 2 × (N-1). It becomes × (M-1) times. For this reason, the number of operations according to the second embodiment is smaller than the number of operations N × N × (M−1) according to the first embodiment described above, so that the analysis time can be shortened.

  Next, specific examples of a processing program analysis device 1 according to the present invention, a machine tool 10 including the same, a processing program analysis program 1a, and a processing program analysis method will be described.

  In the present embodiment, the actual processing program is analyzed using the processing program analysis device 1 according to the present invention, and a portion (isolated command point) where a flaw occurs on the processing surface is detected. Moreover, the same analysis was performed using the processing program analyzer 1 based on Japanese Patent Application No. 2016-248154 devised by the present inventors as a comparative example. The results are shown in FIGS. 19 and 20.

  In this example, as a processing program to be analyzed, a blade processing program for cutting out a blade-like processing target as shown in FIG. 18 by moving the tool tip in a spiral shape was used. Further, in FIG. 19, the isolated command point is displayed as a gray point, and in FIG. 20, the isolated command point is displayed as a triangular mark.

  As shown in FIG. 19, according to the present embodiment, isolated command points are detected with high accuracy even at locations where the distance between command points is short and the density of command points is high compared to the comparative example. . In addition, it can be adjusted with a parameter as to how high the concentration degree of the command point is to detect the isolated command point.

  Further, as shown in FIG. 20, in the comparative example, although a large number of isolated command points were detected, there were many places that would not actually be damaged. On the other hand, in the present embodiment, the isolated command point is detected at the pinpoint, and it is possible to estimate the occurrence position of the flaw on the processing surface with high accuracy.

  According to the above-described embodiment, it is shown that isolated command points can be detected with high accuracy even at locations where the density of command points is high, as compared to the comparative example (analysis processing according to Japanese Patent Application No. 2016-248154) It has been shown that isolated command points can be estimated with high accuracy.

  The machining program analysis device 1 according to the present invention, the machine tool 10 including the same, and the machining program analysis program 1a and the machining program analysis method are not limited to the above-described embodiments and examples, and may be appropriately It can be changed.

  For example, in the first embodiment described above, the command point sequence belonging to the same processing surface is extracted by cluster analysis only when the processing object is a three-dimensional object other than the specific three-dimensional object. It is not limited. That is, when there is a time allowance, a command point sequence belonging to the same processing surface may be extracted by cluster analysis even for a specific three-dimensional object, and division may be performed for each unit processing path. In this way, high-definition analysis can be performed according to the density of command points distributed on each processing surface constituting a specific three-dimensional object.

  In the first embodiment described above, when the object to be processed is a specific three-dimensional object, the processing path division unit 43 calculates an average coordinate obtained by averaging the position coordinates of all command points constituting the processing path as the origin. However, the present invention is not limited to this configuration. That is, although it is considered optimal to use average coordinates as the origin, position coordinates other than average coordinates may be set as the origin.

  Specifically, as shown in FIG. 21A, when the specific three-dimensional object has a simple shape, the origin may be set inside the graphic formed by the processing path. Thus, even if the origin is set at a position that is not the average coordinate, the machining path is divided as a unit machining path for each command point sequence for one rotation. In this case, if the origin is inside the figure, it does not have to be the center of the figure.

  On the other hand, as shown in FIG. 21 (b), the origin may be set outside the figure formed by the processing path. However, in this case, the machining path is divided at two places on the circumference. Further, even if the origin is set inside the above-mentioned figure, depending on the shape of the specific three-dimensional object, as shown in FIG.

  As described above, when the machining path is cut at x points on the circumference, each of the cut machining paths is adjacent to every (x-1) pieces. Therefore, in such a case, it is preferable to group each of the processing path groups having the same shape. As a result, the processing paths in each group are divided as unit processing paths adjacent to each other.

  On the other hand, even if the shape of the specific three-dimensional object is complicated, the average coordinates obtained by averaging the position coordinates of all the command points constituting the machining path are, as shown in FIG. It is often For this reason, when the average coordinate is set as the origin, there is a high possibility that the machining path is divided into one command point sequence for one rotation. Therefore, it is not necessary to perform the above grouping, and the machining path can be easily divided into adjacent unit machining paths.

DESCRIPTION OF SYMBOLS 1 machining program analysis apparatus 1a machining program analysis program 2 display input means 3 storage means 4 arithmetic processing means 10 machine tool 31 analysis program storage unit 32 machining program storage unit 33 analysis result storage unit 41 command point acquisition unit 42 object type acquisition unit 43 machining path division unit 44 physical quantity calculation unit 45 physical quantity classification unit 46 isolated command point detection unit

Claims (10)

A processing path division unit that divides a processing path instructed by a processing program into a plurality of adjacent unit processing paths;
An isolated command point detection unit that detects, as isolated command points, command points in which command points adjacent to each other in the unit processing paths are missing, based on the positional relationship between command points that configure the adjacent unit processing paths. ,
A processing program analysis device having   The isolated command point detection unit performs the second unit machining path for all the command points constituting the first unit machining path in the first unit machining path and the second unit machining path which are the adjacent unit machining paths. Calculates the distance between command points that are the distance to each command point that constitutes the command point, specifies the command point with the shortest distance between the command points as the adjacent command point, and each command that constitutes the second unit machining path The processing program analysis device according to claim 1, wherein among the points, a command point not specified as the adjacent command point from any command point constituting the first unit processing path is detected as the isolated command point.   The said isolated command point detection part is the 1st unit processing path which is the 1st unit processing path and the 2nd unit processing path which are the unit processing path which adjoins from the 1st starting point which is any command point which constitutes the 1st unit processing path concerned From the second start point adjacent to the first start point which is the distance between the first control point to the first end point which is the command point behind the first start point and which is any command point constituting the second unit machining path The distance between the command points to the second end point, which is the command point behind the second start point, is calculated, and when the distance between the command points exceeds an arbitrary threshold, the distance between the command points is shorter The processing program analysis device according to claim 1, wherein a command point that is an end point of is detected as the isolated command point. When the processing program is a processing program for processing a specific three-dimensional object having a shape in which the command points are distributed on the circumference around a certain reference point,
The machining path division unit calculates an average coordinate obtained by averaging the position coordinates of all the command points constituting the machining path as an origin, and converts the position coordinates of all the command points with respect to the origin into polar coordinates, 1 The processing program analysis device according to any one of claims 1 to 3, wherein the unit processing path is divided as the unit processing path for each command point sequence for the circumference. When the processing program is a processing program for processing a three-dimensional object other than a specific three-dimensional object having a shape in which the command points are distributed on the circumference around a certain reference point
A physical quantity calculation unit that calculates a predetermined physical quantity using position coordinates of one or a plurality of command points for each command point constituting the command point sequence of the machining program;
A physical quantity classification unit that classifies the physical quantities into a plurality of groups by performing cluster analysis on the physical quantities of each command point;
The processing path division unit extracts a command point sequence belonging to the same processing surface based on the classification result by the physical quantity classification unit, and the distance between the front and back command points in the processing sequence of the command point sequence is arbitrary. The processing program analysis device according to any one of claims 1 to 4, wherein the processing path is divided between command points which are equal to or more than a threshold value. When the processing program is a processing program for processing a three-dimensional object other than a specific three-dimensional object having a shape in which the command points are distributed on the circumference around a certain reference point,
A physical quantity calculation unit that calculates a predetermined physical quantity using position coordinates of one or a plurality of command points for each command point constituting the command point sequence of the machining program;
A physical quantity classification unit that classifies the physical quantities into a plurality of groups by performing cluster analysis on the physical quantities of each command point;
The processing path division unit extracts a command point sequence belonging to the same processing surface based on the classification result by the physical quantity classification unit, and the direction between the command points before and after in the processing sequence of the command point sequence is a pick feed The machining path is divided between any one of the command points in which the angle between the command points changed in the direction or more or the command points before and after changes in the direction between the command points or more. The processing program analysis device described.   The isolated command point detection unit sequentially detects the isolated command points in the forward direction along the processing direction and sequentially detects the isolated command points in the direction opposite to the forward direction for each of the unit processing paths. The processing program analysis device according to any one of claims 1 to 6.   A machine tool comprising the machining program analysis device according to any one of claims 1 to 7. A processing path division unit that divides a processing path instructed by a processing program into a plurality of adjacent unit processing paths;
An isolated command point detection unit that detects, as isolated command points, command points in which command points adjacent to each other in the unit processing paths are missing, based on the positional relationship between command points that configure the adjacent unit processing paths. Machining program analysis program to make the computer function. A processing path division step of dividing the processing path instructed by the processing program into a plurality of adjacent unit processing paths;
And an isolated command point detection step of detecting as an isolated command point a command point where command points adjacent to each other in the unit processing paths are missing, based on the positional relationship between the command points constituting each of the adjacent unit processing paths. ,
A processing program analysis method having