JP2019098364A - Cutting device, cutting program, automatic generation program, control system, cutting device and work-piece manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting method for facilitating cutting of a microjoint in the next step in a cutting method for cutting a work material while leaving a microjoint. SOLUTION: In a cutting method, a first machined groove is formed along a first machined locus T1 extending from a start point P0 of the planned machined locus to a first dividing point P1 located on the planned machined locus. From the second division point P2 located on the machined groove forming step and the end point P3 side of the planned machined locus with respect to the first division point P1 on the machined planned locus with a gap from the first division point P1. The second machined groove forming step of forming the second machined groove along the second machined groove T2 extending to the end point P3 of the planned machined locus, and at least the first division point P1 and the second dividing point P2. On the other hand, a through hole forming step of forming a through hole H penetrating the work material W0 is provided on the residual material planned portion W2 side to be cut from the product planned portion. [Selection diagram] FIG. 5

Description

  The present invention relates to a cutting method, a cutting program, an automatic generation program, a control system, a cutting device, and a method of manufacturing a workpiece in which a micro joint is left, in which a micro joint is left to cut a workpiece.

  In the manufacture of shipbuilding, bridges and construction machines, gate-type cutting devices movable on rails are used to cut very large steel plates. The cutting device cuts the workpiece using a plasma arc, a laser, a gas flame or the like. In either case, heat is generated in the workpiece during cutting.

  When cutting a very large steel plate by using a cutting device, the steel plate is cut so that the micro joint (connection portion, bridge portion) remains in the steel plate in order to prevent floating of the steel plate due to heat generated by the cutting and cutting device Generally, a method of cutting the micro joint using a hand cut gas blowing pipe or the like after the cutting by the Patent Document 1 describes a cutting device capable of forming a joint when forming a processing groove.

In these cutting methods, as shown in FIG. 14, when cutting the workpiece W0, Bujirri portion B is a first machining path T ₁ and the second processing path T ₂ is microscopic joint B to remain The machined groove is formed by the cutting device so as to be separated by After the formation of the processed groove by the cutting device, the micro joint B is cut using a hand cut gas blow pipe or the like.

JP 2009-241083 A

  However, in such a conventional cutting method, since the cut groove of the processed groove is narrow, the operation of cutting the micro joint using a hand cut gas blowing pipe or the like is a time consuming operation. In particular, in a laser cutting apparatus that performs cutting by irradiating a laser, it is difficult to cut a micro joint using a hand cut gas blow pipe or the like in the next step because the cutting groove of the processing groove is very narrow. .

  The present invention has been made in consideration of such circumstances, and a cutting method, cutting program, automatic generation in which a micro joint is left to cut a workpiece and cutting of the micro joint in the next step is easy. It is an object of the present invention to provide a program, a control system and a cutting device, and to provide a method of manufacturing a workpiece in which micro joints which are easy to cut remain.

In order to solve the above-mentioned subject, this invention proposes the following means.
In the cutting method according to the present invention, the processing planned trajectory is divided into a first processing trajectory and a second processing trajectory, and a micro joint is formed between the first processing trajectory and the second processing trajectory to form a workpiece. A cutting method for cutting by irradiation of a laser, wherein a first processing groove is formed along the first processing locus extending from a start point of the processing planned locus to a first division point located on the processing planned locus In one machining groove forming step, the machining is performed from the second division point located between the first division point and the second division point on the end side of the processing predetermined locus with respect to the first division point on the processing planned locus. A second machined groove forming step of forming a second machined groove along the second machined trajectory extending to the end point of the planned trajectory, and at least one of the first dividing point and the second dividing point from the product planned portion The above-mentioned residual material planned part side to be cut The workpiece therethrough, and a through hole forming step of forming a through hole having a width of more than 3mm in a direction towards the residual material scheduled portion from the planned processing path in a direction orthogonal to the penetrating direction.

  The cutting method according to the present invention may further include a micro joint cutting step of cutting the micro joint with a gas flame after the first groove forming step, the second groove forming step and the through hole forming step.

  A cutting program according to the present invention comprises a platen for placing a workpiece, a cutting torch for irradiating the laser to cut the workpiece, and a movement for moving the cutting torch relative to the workpiece. A processing planned trajectory is divided into a first processing trajectory and a second processing trajectory, and a micro joint is formed between the first processing trajectory and the second processing trajectory by a cutting device provided with a mechanism; A cutting program for cutting a workpiece, which controls the moving mechanism to control the cutting torch, and extends from a start point of the planned machining locus to a first division point located on the planned machining locus. A second dividing point is formed along the processing path, and a second dividing point is opened on the processing planned path at the end point side of the processing planned path than the first division point on the end side of the processing planned path. Of the processing planned trajectory from A processing groove is formed along the second processing path extending to the end point, and at least one of the first division point and the second division point, on the remaining material planned portion side to be cut from the product planned portion, A through hole having a width of 3 mm or more in the direction perpendicular to the penetrating direction and penetrating from the processing planned trajectory toward the residual material planned portion is formed.

  The automatic generation program according to the present invention includes moving a platen for placing a workpiece, a cutting torch for irradiating the laser to cut the workpiece, and moving the cutting torch relative to the workpiece. A cutting mechanism comprising: a moving mechanism; and an automatic generation program for changing and adding a planned machining trajectory, wherein the planned machining trajectory is divided into a first machining trajectory and a second machining trajectory, and the first machining trajectory Extends from the start point of the planned machining locus to the first division point located on the planned machining locus, and the second machining locus is the planned machining locus rather than the first division point on the planned machining locus Extends from a second division point located between the first division point and the first division point on the end point side of the first division point to the end point of the processing planned trajectory, at least one of the first division point and the second division point , Product schedule A through hole having a width of 3 mm or more in a direction perpendicular to the penetrating direction and penetrating the work material on the side of the residual material planned portion to be cut from the side, which is orthogonal to the penetrating direction Add a machining trajectory to form

  The automatic generation program according to the present invention may determine the number of divisions of the processing planned trajectory based on the length from the start point to the end point of the processing planned trajectory.

  A control system according to the present invention comprises the above-mentioned cutting program.

  A cutting device according to the present invention comprises the control system described above.

  In the method of manufacturing a workpiece according to the present invention, the processing planned trajectory is divided into a first processing trajectory and a second processing trajectory, and a micro joint is formed between the first processing trajectory and the second processing trajectory. The method for manufacturing a workpiece, wherein the workpiece is cut by irradiation of a laser, wherein the first processing trajectory extends from a start point of the planned machining trajectory to a first division point located on the planned machining trajectory. In the first processing groove forming step of forming a first processing groove along the processing planned trajectory, on the end side of the processing planned trajectory with respect to the first division point, an interval with the first division point is opened. A second machined groove forming step of forming a second machined groove along the second machining locus extending from the second division point located to the end point of the planned machining locus, the first division point and the second division At least one of the points cut off from the product plan part Forming a through hole having a width of 3 mm or more in the direction toward the remaining material planned portion from the processing planned trajectory, which penetrates the workpiece and is orthogonal to the penetrating direction on the remaining material planned portion side And a through hole forming step.

  According to the cutting method, the cutting program, the automatic generation program, the control system, and the cutting device according to the present invention, the cutting of the micro joint in the next step is facilitated. Moreover, according to the method of manufacturing a workpiece according to the invention, it is easy to cut the micro joint remaining in the workpiece.

(A) is a perspective view explaining an example of a schematic structure of a cutting device concerning a first embodiment of the present invention. (B) is a block diagram explaining an example of schematic structure of the control system of the cutting device. It is a side view which shows the structure of the torch holding member of the cutting device. It is a flowchart which shows the outline of the operation | movement procedure of the control system of the cutting device. It is a top view of the steel plate cut by the cutting device. It is a top view of the steel plate cut by the cutting device. It is a perspective view at the time of a cutting start of the 1st processing locus of a steel plate cut with the cutting device. It is a perspective view in the middle of cutting of the 1st processing locus of a steel plate cut with the cutting device. It is a perspective view at the time of a cutting start of the 2nd processing locus of a steel plate cut with the cutting device. It is a top view which shows the modification of the process locus | trajectory of the steel plate cut | disconnected by the cutting device. It is a top view which shows the modification of the process locus | trajectory of the steel plate cut | disconnected by the cutting device. It is a perspective view which shows the modification of the process locus | trajectory of the steel plate cut | disconnected by the cutting device. It is a perspective view which shows the modification of the process locus | trajectory of the steel plate cut | disconnected by the cutting device. It is a perspective view of a steel plate cut by a cutting device concerning a second embodiment of the present invention. It is a perspective view which shows the process locus | trajectory of the steel plate cut | disconnected by the conventional cutting device.

First Embodiment
A first embodiment of the present invention will be described with reference to FIGS. 1 (A) to 12. In addition, in order to make a drawing legible, the dimension etc. of each component are adjusted suitably.
FIG. 1A is a view showing the overall configuration of a cutting apparatus 100 according to the present embodiment. FIG. 2 is a side view showing the configuration of the torch holding member 10 of the cutting device 100. As shown in FIG.

  As shown in FIG. 1A, the cutting apparatus 100 holds the torch 2, the platen 3, the torch holding member 10 for holding the torch 2 and holding the torch 2 at a predetermined angle, and the torch 2 for holding the torch 2 The control system 20 is provided with a moving mechanism 16 for moving the member 10 in the X-axis direction (traveling direction) and the Y-axis direction (transverse direction) on the surface plate of the cutting apparatus 100.

  The torch (cutting torch) 2 is a laser torch in which the tip end side of the cylindrical part is formed in a substantially conical shape and the nozzle hole is opened at the tip as shown in FIG. The laser beam generated in step b) is irradiated from the nozzle hole to form a slit in the workpiece W0. In the present embodiment, the workpiece W0 is a steel plate. The workpiece W0 may be other than plate-like, for example, block-like or pipe-like.

A fiber laser oscillator (not shown) includes, for example, an LD (laser diode) and an amplification fiber, and a laser beam oscillated by the LD (laser diode) can be amplified by the amplification fiber and used for cutting. Is configured to generate
Then, a laser beam generated by the fiber laser oscillator is transmitted to the torch (cutting torch) 2 via a transmission fiber (not shown).

In the present embodiment, the torch 2 is positioned above the surface plate 3 and a processing groove is machined into the workpiece W0 such as a steel plate by irradiating a laser beam in the direction of the axis of the torch 2 (hereinafter referred to as torch axis) O1. .
A machining point is formed at the intersection of the torch axis O1 of the torch 2 and the machining surface of the workpiece W0, and a machining groove is formed on a path along which the machining point moves, that is, a machining locus.

  The surface plate 3 is for placing the workpiece W0 to be processed by the torch 2, and on both sides of the surface plate 3, the carriage moves in the traveling direction (hereinafter referred to as the X-axis direction) And the torch holding member 10 described later arranged on this carriage is movable in the transverse direction (hereinafter referred to as the Y-axis direction), and the upper surface of the platen 3 has the X-axis and the Y-axis. It is a flat surface along the XY plane composed of the axes.

  In the torch holding member 10, as shown in FIG. 2, the tubular members 12 and 13 having a substantially L-shaped side view are connected via the bearing 12a, and the upper end of the tubular member 12 is supported via the bearing 14 in the support frame 10a. Is rotatably supported about the optical axis A. The torch 2 for irradiating the platen 3 with laser light is provided at the lower end of the tubular member 13. A first spur gear 15 a is disposed at a portion of the outer periphery of the tubular member 12 located inside the bearing 14. The first spur gear 15a is disposed so as to mesh with a second spur gear 15c which is rotated by a drive motor 15b fixed to the support frame 10a. The drive of the drive motor 15b is configured such that the output by the limit switch 15d is sent to the control system 20 and controlled. The drive motor 15b, the first spur gear 15a, the second spur gear 15c, and the limit switch 15d constitute a turning mechanism 15A.

  On the other hand, a third spur gear 16a is disposed at a portion of the outer periphery of the tubular member 13 located inside the bearing 12a. The third spur gear 16 a is disposed to mesh with a fourth spur gear (not shown) rotated by a drive motor (not shown) fixed to the tubular member 12. In this configuration, the torch 2 can tilt in the vertical plane about the optical axis B. The third spur gear 16a, the fourth spur gear, and the drive motor constitute an angle setting mechanism 15B.

  By turning the angle setting mechanism 15B about the optical axis B, the torch axis O1 can be inclined to a desired inclination angle and can be directed to any direction of the workpiece WO in plan view.

  The inclination angle refers to an angle at which the torch axis O1 intersects with the processing surface of the workpiece in a plane orthogonal to the direction in which the torch 2 moves relative to the workpiece WO. In other words, it refers to an angle at which the torch axis O1 intersects with the processing surface in the plane of the normal direction (the direction orthogonal to the tangent) of the processing trajectory.

  The moving mechanism 16 moves the torch holding member 10 in the transverse direction (Y-axis direction) on the carriage, and the X-axis direction moving mechanism 16X for moving the carriage on which the torch holding member 10 is disposed in the traveling direction (X-axis direction). And the torch holding member 10 together with the torch 2 on the basis of the X-axis direction control signal and the Y-axis direction control signal output from the calculation unit 22 to the driver 26. By driving in the direction and the Y-axis direction, the torch 2 is moved to a predetermined XY coordinate position.

The moving mechanism 16 also includes a Z-axis direction moving mechanism 16Z that enables the torch holding member 10 to move in the height direction (Z-axis direction), and the Z-axis direction moving mechanism 16Z is configured to hold the torch by the support frame 10a. It is connected to the member 10, the height of the torch holding member 10 can be changed as needed, and the distance between the tip of the torch 2 and the workpiece can be adjusted.
The moving mechanism 16 configured in this manner moves the torch 2 relative to the workpiece W0.

FIG. 1B is a block diagram for explaining an example of a schematic configuration of a control system.
As shown in FIG. 1B, the control system 20 includes an input unit 21, an operation unit 22, a storage unit 24, and a driver 26. The storage unit 24 includes, for example, as shown in FIG. Contains a disconnection program that operates according to the following procedure. When the calculation unit 22 executes the cutting program, the control system 20 controls the path of the processing point by the torch holding member 10 and the moving mechanism 16, the inclination angle of the torch 2 by the angle setting mechanism 15B, etc. A processed groove having a desired shape can be formed in WO.
The cutting program may be configured by one or both of the control program and an NC program that defines the operation of the control program.

The input unit 21 is for inputting data related to the workpiece WO into the operation unit 22. For example, the material of the workpiece WO, thickness t, and processing schedule of the torch 2 as data regarding the workpiece WO locus data concerning (workpiece WO plan view shape) T ₀ is input.

Data relating to the planned processing trajectory T ₀ is, for example, given as the coordinate data, since the working point is moved by the inclination of the working surface of the workpiece WO (or the inclination angle of the torch axis O1), data relating to the planned processing trajectory T ₀ Is preferably represented by, for example, a root plane defined orthogonal to the processing plane.

The calculation unit 22 is a program executable device (computer) including hardware such as a CPU and a memory (not shown).
The calculation unit 22 calculates a processing point, an inclination angle, and the like for forming a corresponding processed groove, based on the input data about the processing planned trajectory T ₀ and the like and the cutting program.

  In addition, the calculation unit 22 is configured such that the rotation angle of the angle setting mechanism 15B for the torch axis O1 of the torch 2 to turn to a predetermined inclination angle, and the rotation angle of the rotation mechanism 15A for the processing point to move along the processing trajectory. The controller 26 calculates appropriate positions of the torch holding member 10 and the moving mechanism 16 and outputs a control signal for driving them to the driver 26.

The storage unit 24 is a non-volatile storage medium such as a hard disk or a ROM.
In the storage unit 24, for example, data necessary for cutting related to the material of the workpiece and the thickness t are stored as a database. The database is referred to when the cutting program calculates a machining point or the like.

  The driver 26 moves the torch 2 in the X-axis direction to control the X-coordinate position of the processing point X-axis direction moving mechanism 16X, moves in the Y-axis direction to control the Y-coordinate position of the processing point Y-axis direction movement The driving power is supplied to the mechanism 16Y, the Z-axis direction moving mechanism 16Z that moves in the Z-axis direction to control the Z coordinate position of the processing point, the turning mechanism 15A, and the angle setting mechanism 15B.

In the present embodiment, the driver 26 defines the XY coordinate position between the required passing points of the processing point along the processing locus output from the calculation unit 22, and the rotation angles of the turning mechanism 15A and the angle setting mechanism 15B. By driving the X-axis direction moving mechanism 16X, the Y-axis direction moving mechanism 16Y, the turning mechanism 15A, and the angle setting mechanism 15B based on the drive command signal, the torch axis O1 is inclined in a predetermined direction. The angle is maintained and moved along the processing path.
Further, the turning angles of the turning mechanism 15A and the angle setting mechanism 15B at the processing point at the required passing point on the processing locus can be controlled by linear interpolation.

  Next, the operation of the cutting program according to the present embodiment will be described with reference to FIG. FIG. 3 is a flow showing an example of an operation procedure of the cutting program in the control system 20. First, the calculation unit 22 performs an initialization operation of the cutting device 100 and the like, and starts control of the cutting process (step S10). Next, the calculation unit 22 executes step S11.

(Step S11)
In step S11, the control system 20, the operator, as the data relating to the workpiece W0, for example, the material of the workpiece W0, the thickness t, the angle of inclination of the torch 2, the data relating to the planned processing trajectory T ₀ , Asking for input from the input unit 21.

FIG. 4 is a plan view of a steel plate to be cut. In the following description, the coordinates of the x-axis coordinate x and the y-axis coordinate y are shown as (x, y).
The operator, as shown in FIG. 4, and inputs the start point P0 (X0, Y0) of the planned processing trajectory _{T 0} of cutting, the end point P3 and (X3, Y3). In the present embodiment, a straight line connecting the start point P0 and the end point P3 is parallel to the Y axis as shown in FIG. The operator can input an arbitrary position on the steel plate as the start point P0 and the end point P3.
The starting point P0 is disposed at the remaining material planned portion W2 separated from the product planned portion W1 as shown in FIG. 4 in order to perform a drilling process (piercing) for cutting. When the input from the input unit 21 by the operator is completed, the calculation unit 22 next executes step S12.

(Step S12)
In step S12, the arithmetic unit 22 calculates the machining conditions planned processing path _{T 0.} The calculation of the processing conditions is performed by an automatic generation program. The automatic generation program is an application program installed in the control system 20, and is a program for changing and adding the machining path defined by the cutting program. Automatic generation program material of the workpiece W0 input in step S11, the thickness t, the angle of inclination of the torch 2, the length of the start and end points of the planned processing trajectory T _0, which is stored in the storage unit 24 database From this, the number of divisions of the machining trajectory including the presence or absence of the actual machining trajectory and the formation of the micro joint B is determined.

FIG. 5 is a plan view of a steel plate to be cut in which the machining trajectory changed and added by the automatic generation program is shown.
The arithmetic unit 22 has a linear distance of 1 m or more from the start point P0 (X0, Y0) to the end point P3 (X3, Y3), and when considering the material of the workpiece W0 and the thickness t, the steel plate jumps up It is determined that the possibility is high, and as shown in FIG. 5, it is decided to form the micro joint B between one start point P0 (X0, Y0) and the end point P3 (X3, Y3).
The calculation unit 22 forms the micro joint B, for example, according to the number and position of the micro joint B input by the operator, regardless of the linear distance from the start point P0 (X0, Y0) to the end point P3 (X3, Y3). It is also possible to determine the number of divisions of the processing trajectory including the presence or absence of and the position of the micro joint B.

Planned processing trajectory _{T 0,} as shown in FIG. 5, the micro joint B, a first machining path _{T 1} including the start point P0 to (X0, Y0), is divided into a second processing path _{T 2} including the end point P3 . Here, as shown in FIG. 5, the end point of the first machining path T ₁ P1 (first division point), the starting point of the second processing path T ₂ and P2 (second division point).

The first processing path T _1, as shown in FIG. 5, from the start point P0 of the planned processing trajectory T _0, extending to the first division point P1 located on the planned processing path T _0.
Second processing path T ₂ are, as shown in FIG. 5, on the planned processing trajectory T _0, the end point P3 side of the planned processing trajectory T ₀ than the first division point P1, opened between the first dividing point P1 from the second division point P2 located Te, it extends to the end point P3 of the planned processing path T _0.
The micro joint B is formed between the first division point P1 and the second division point P2. The distance between the first division point P1 and the second division point P2 is approximately 1 to 20 mm.

On the other hand, the calculation unit 22 has a short linear distance from the start point P0 (X0, Y0) to the end point P3 (X3, Y3), if the jump of the steel sheet is determined to be less likely to occur, the planned processing trajectory _{T 0} Do not divide.

Calculation unit 22, in the first division point P1 of the first machining trajectory T _1, as shown in FIG. 5, the auxiliary passage point from the machining grooves G11, the auxiliary passage point P11 from the first dividing point P1 to the auxiliary passage point P11 A machining groove G12 up to P12 and a machining groove G13 from the auxiliary passage point P12 to the auxiliary passage point P13 are added as a machining locus.

  The auxiliary passing point P11, the auxiliary passing point P12, and the auxiliary passing point P13 are disposed not at the product planned portion W1 but at the remaining material planned portion W2 to be cut from the workpiece W0.

As shown in FIG. 5, the first machining path T ₁ and the machining grooves G12 are formed parallel to, and are formed parallel to the machined groove G11 and the machining groove G13. The auxiliary pass point P13 is in contact with the first machining path _{T 1.} Therefore, the first machining trajectory _{T 1,} and the processing grooves G11, the machining grooves G12, the machining grooves G13, by forming a the remaining material scheduled portion W2 of the workpiece W0, penetrates the workpiece W0 Through holes H can be formed.

The through hole H serves as an insertion slot for inserting a gas flame such as a manual gas blow tube for cutting the micro joint B after completion of the cutting process by the cutting device 100 based on the cutting program. To facilitate insertion of the gas flame, the through-hole H is such that the width of the direction from the planned processing trajectory T ₀ in a direction orthogonal to the penetrating direction of the through hole H to the residual material scheduled portion W2 becomes a 3mm or more Preferably, the machined groove G11, the machined groove G12, and the machined groove G13 are formed. In the present embodiment, the processed groove G11 has a width of 3 mm or more in the direction orthogonal to the penetration direction.

Further calculation unit 22, the second division point P2 of the second processing path T _2, as shown in FIG. 5, to add a sub processing groove G21 of the auxiliary passage point P21 to the second division point P2 as the machining trajectory. The auxiliary passing point P21 is disposed at the remaining material planned portion W2.
When splitting the planned processing trajectory T ₀ in the first machining path T ₁ and the second processing path T _2, to initiate the cutting of the second machining path T _2, machining a hole for the cuts (piercing) Need to do again. It is desirable that this piercing be performed not at the product planned part W1 but at the remaining material planned part W2. Therefore, the auxiliary passing point P21 to be pierced is disposed at the remaining material scheduled portion W2. In the following description, the auxiliary processing groove G21 from the auxiliary passing point P21 to the second division point P2 is referred to as a "recut portion".

Calculation unit 22, when the calculation of the processing conditions is completed, then step S13 and executes the subsequent, it starts cutting the first machining path T ₁ of the workpiece W0.

(Step S13)
Figure 6 is a perspective view of the workpiece W0 in the first processing path T ₁ of the cutting starting time.
In step S13, the arithmetic unit 22 starts the cutting of the first machining path _{T 1.} The arithmetic unit 22 outputs a control signal to the driver 26, and as shown in FIG. 6, arranges the torch 2 above the start point P0 and makes the processing point coincide with the start point P0. Next, the calculation unit 22 starts irradiation of the laser beam, and forms a hole at the starting point P0 by piercing.
Next, operation unit 22 executes step S14.

(Step S14)
In step S14, the arithmetic unit 22, the torch 2 is moved in the Y-axis direction, to move the working point from the first machining path T ₁ of the starting point P0 toward the first dividing point P1 of the first machining trajectory T _1, The first processed groove is formed (first processed groove forming step).
Next, operation unit 22 executes step S15.

(Step S15)
In step S15, the arithmetic unit 22 determines the first division point P1 of the first machining trajectory T _1, whether cutting is completed. In After cutting of the first machining trajectory T _1, since then it is necessary to cut the second work locus T _2, arithmetic unit 22, in the first division point P1 of the first machining trajectory T _1, " It is determined that the processing is not completed. When it is determined that the processing is not completed, the calculation unit 22 next executes step S16.

On the other hand, in step S12, if it is determined that "not divided planned processing trajectory T _0", no after cutting the first machining trajectory T _1, cutting of the subsequent need. In this case, the calculation unit 22 determines that “processing is completed”, and completes the cutting processing.

(Step S16)
Figure 7 is a perspective view of a workpiece W0 in the formation of a through hole H to the first milling end point of the trajectory T _1.
In step S16, the arithmetic unit 22, a processed groove G11 of calculating the trajectory in step S12, and the processing grooves G12, the machining grooves G13, was cut to a first division point is the end point of the first machining path _{T 1} A through hole H is formed in P1 (through hole forming step). The torch 2 is moved to move the processing point from the auxiliary passing point P11 toward the auxiliary passing point P13 via the auxiliary passing point P12. Thereafter, the calculation unit 22 stops the irradiation of the laser beam from the torch 2 and interrupts the cutting process.
Next, the arithmetic unit 22 executes a step S13, starts the cutting of the second machining path _{T 2.}

(Step S13)
In step S13, the arithmetic unit 22 starts the disconnection of the second machining path _{T 2.} The calculation unit 22 outputs a control signal to the driver 26, and as shown in FIG. 8, arranges the torch 2 above the auxiliary passing point P21 so that the processing point coincides with the auxiliary passing point P21. Next, the calculation unit 22 starts irradiation of the laser beam, and forms a hole at the auxiliary passing point P21 by piercing.
Next, operation unit 22 executes step S14.

(Step S14)
In step S14, the arithmetic unit 22 moves the torch 2, the working point from the auxiliary passage point P21 via a second dividing point P2 of the two machining trajectory T ₂ is moved toward the end point P3, the second work Form a groove. Next, operation unit 22 executes step S15.

(Step S15)
In step S15, the calculation unit 22 determines whether or not the cutting process is completed at the end point P3 of the _second process path T2. In After cutting of the second machining path T _2, for further cutting is not required, the operation unit 22 at the end P3 of the second machining path T _2, is determined as "processing completed".
The calculation unit 22 determines that “processing is completed” and completes the cutting process (second processed groove forming step).

After completion of the cutting process based on the above-described cutting program by the cutting device 100, the product planned portion W1 and the remaining material planned portion W2 are connected at least at the micro joint B. In order to cut the micro joint B, for example, a gas flame of a hand cut gas blowing tube is inserted into the through hole H. The gas flame hand cutting gas blowpipe, by moving parallel to the direction of the second machining path T ₂ of the second division point P2, it is possible to easily cut the micro joint B (micro joint cutting step).
When a plurality of micro joints are formed on the workpiece W0, the micro joint cutting process may be performed as a post-process after completion of the cutting process for forming all the micro joints, or some micro joints are formed. After completion of the cutting process, the micro joint cutting process may be performed on the formed micro joint.

Width from the planned processing trajectory T ₀ in a direction orthogonal to the extending direction toward the surplus material scheduled portion W2 of the through-hole H is desirably 3mm or more. In that case, for example, the cutting width (about 1.5 mm to 2 mm) of the gas flame of the manual gas blow tube used in the micro joint cutting step is sufficiently larger, and the user can easily make the gas flame of the manual gas blow tube. The micro joint B can be cut by inserting into the through hole H.

Here, at the time of cutting by hand cutting gas blowpipe, considering that the misalignment manual occurs, re-cut portion, the second machining path T ₂ of the second surplus material scheduled portion W2 direction from the dividing point P2 Preferably have a width of at least 3 mm.

  Here, the side surface (the processing groove G11 side) of the through hole H which is first cut in the micro joint cutting step forms an angle of 80 degrees to 90 degrees with respect to the direction in which the gas flame of the manual gas blow tube is moved. Is formed. Therefore, at the time of cutting by the manual cutting gas blow pipe, it is easy to start cutting processing by the gas flame of the manual cut gas blow pipe suitably. It is desirable that the side surface (the processing groove G11 side) of the through hole H be perpendicular to the direction in which the gas flame of the hand cut gas blow tube is moved.

(Effect of the first embodiment)
According to the cutting method, the cutting program, the automatic generation program, the control system, the cutting device 100, and the method of manufacturing a workpiece according to the present embodiment, the first processing trajectory T is used to facilitate cutting of the micro joint B in the post process. _A through hole H is formed in the remaining material planned portion W2 to be cut from the product planned portion W1 at the first division point P1. Through hole H has the same effect as widening the kerf in the first division point P1 of the first machining trajectory T _1, easy to insert the gas flame, such as a hand cutting gas blowpipe for cutting micro joints Do.

According to the cutting method, the cutting program, the automatic generation program, the control system, the cutting device 100, and the method for manufacturing a workpiece according to the present embodiment, the start point P0 (X0, Y0) and the end point P3 (X3, Y3) of the processing trajectory to be cut And the number of divisions of the processing trajectory including the presence or absence of the micro joint B in consideration of the material, thickness t, etc. of the workpiece W0, and if it is determined that it is necessary, the processing schedule Divide the locus T ₀ . The floating of the workpiece W0 can be suitably prevented.

(Modification)
The first embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are also included. . In addition, the components shown in the above-described first embodiment and the modifications described below can be combined appropriately.

In the above embodiment, the laser is a fiber laser, but the type of laser is not limited thereto. The laser may be a YAG laser, a CO ₂ laser, or the like.

  In the above embodiment, when the operator inputs the start point P0 (X0, Y0) and the end point P3 (X3, Y3) of the processing locus to be cut, the processing groove for forming the through hole H by the automatic generation program ( Although the processing locus of G11, G12 and G13) and the auxiliary processing groove G21 is calculated and added to the processing locus, the setting mode of the processing locus is not limited to this. The operator may determine the machining path by inputting the machining path of the machining grooves (G11, G12, G13) and the auxiliary machining groove G21 as a cutting program.

  In the above embodiment, although the number of micro joints B formed between the start point P0 (X0, Y0) and the end point P3 (X3, Y3) of the processing locus to be cut is one, the number of micro joints is the same. It is not limited to. The number of micro joints B may be increased in proportion to the distance between the start point P0 (X0, Y0) and the end point P3 (X3, Y3). If the number of micro joints B increases, in the control flow of the cutting program shown in FIG. 3, the number of times of loop processing from step S13 to step S16 also increases. A through hole H is formed at the end point of the divided processing locus except for the end point P3 (X3, Y3). That is, the same number of through holes H as the number of micro joints are formed.

In the said embodiment, although the shape of the through-hole H was a rectangular shape in planar view of the to-be-processed material W0, the shape of the through-hole H is not limited to this. FIG. 9 and FIG. 10 are plan views showing modified examples of the processing trajectory. The through holes may be circular in plan view of the workpiece W0 as shown in FIG. In addition, as shown in FIG. 10, the through holes may be triangular in a plan view of the workpiece W0. In any case, the through hole H is in a direction perpendicular to the penetrating direction of the through hole H so that it is easy to insert a manual gas blow tube or the like for cutting the micro joint B from the planned processing trajectory T ₀ It is desirable that the width in the direction toward the remaining material planned portion W2 be 3 mm or more.

In the said embodiment, although the shape of a re-cut part was linear, the shape of a re-cut part is not limited to this. As shown in FIG. 9, the shape of the recut portion may be a "U" shape, or as shown in FIG. 10, may be an "L" shape. In any case, at the time of cutting by hand cutting gas blowpipe, considering that the misalignment manual occurs, re-cut part, surplus material scheduled portion from the second division point P2 of the second processing path T ₂ It is desirable to have a width of at least 3 mm in the W2 direction.

  In the said embodiment, although the through-hole H was formed in the 1st division | segmentation point P1, the formation position of a through-hole is not limited to this. FIG. 11 is a perspective view showing a modification of the processing trajectory. The through hole may be formed at the second dividing point P2 like the through hole HB shown in FIG. If at least one of the first division point P1 and the second division point P2 has a through hole formed on the remaining material planned portion side, a gas flame such as a manual gas blow tube for cutting the micro joint is inserted Cheap. If the through holes are formed at both the first division point P1 and the second division point P2, the micro joint can be cut more suitably.

As shown in FIG. 11, the outline of the processing method for forming the through hole HB at the second dividing point P2 is as follows.
Like the above embodiment, a cutting of the first machining path T _1. In step S16, instead of forming the through hole, as shown in FIG. 11, an auxiliary processing groove G12 from the first dividing point P1 to the auxiliary passing point P11 is formed. The auxiliary passing point P11 is disposed at the remaining material planned portion W2.

In step S13, when starting the cutting of the second machining path T _2, at any place of the remainder scheduled portion W2, the start of irradiation of the laser beam to form a hole by piercing. Thereafter, the torch 2 is moved to the second dividing point P2 via the auxiliary passing points P23, P22, and P21, whereby the rectangular pillar-shaped through holes HB similar to the through holes H of the above embodiment are formed ( Through hole forming step). Thereafter, as in the above embodiment, a cutting of the second machining path T _2.

In order to cut the micro joint B, for example, a gas flame of a hand cut gas blowing tube is inserted into the through hole HB. The gas flame hand cutting gas blowpipe, by moving parallel to the direction of the first dividing point P1 of the first machining trajectory T _1, it is possible to easily cut the micro joint B (micro joint cutting step). Again, at the time of cutting by hand cutting gas blowpipe, considering that the misalignment manual occurs, the sub processing grooves G12 are surplus material scheduled portion from the first dividing point P1 of the first machining path T ₁ It is desirable to have a width of at least 3 mm in the W2 direction.

In the said embodiment, although the process groove | channel formed is perpendicular | vertical with respect to the plate | board thickness direction of a steel plate, the cutting aspect of a steel plate is not limited to vertical cutting. FIG. 12 is a perspective view of a steel material cut into a groove shape by an inclined processing groove. By controlling the inclination angle of the torch 2 by the angle setting mechanism 15B, the through hole H can be formed even in the case of forming a groove shape as shown in FIG. The groove shape may be any of various groove shapes such as Y groove shape. Even in this case, through-holes H, it is preferable that the width of the direction from the planned processing trajectory T ₀ in a direction orthogonal to the penetrating direction of the through hole H to the residual material scheduled portion W2 is equal to or greater than 3 mm.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIG. The present embodiment is different from the first embodiment in the method of cutting through holes H. In the following description, the same reference numerals are assigned to components common to those described above, and redundant description will be omitted.

  The whole structure of the cutting device 100B which concerns on this embodiment is the same as the cutting device 100 which concerns on 1st embodiment. The cutting device 100B is different from the cutting device 100 in the control of the torch 2 at the time of forming the through holes H.

FIG. 13 is a perspective view of a steel plate cut by the cutting device 100B. When forming the through hole H to the first division point P1 of the first machining trajectory T _1, arithmetic unit 22, not the torch 2 by the movement mechanism 16 further controls the angle setting mechanism 15B, and the position of the torch 2 The inclination angle is adjusted to form the through holes H in a conical shape as shown in FIG. 13 (through hole forming step). Even in this case, through-holes H, it is preferable that the width of the direction from the planned processing trajectory T ₀ in a direction orthogonal to the penetrating direction of the through hole H to the residual material scheduled portion W2 is equal to or greater than 3 mm.

(Effect of the second embodiment)
According to the cutting method, the cutting program, the automatic generation program, the control system, the cutting device 100, and the method for manufacturing a workpiece according to the present embodiment, by using the moving mechanism 16 and the angle setting mechanism 15B for forming the through hole H, Various shapes of the through holes H can be formed. Even when the cutting mode of the steel plate is not vertical cutting but complicated bevel cutting, the through hole H can be formed by using the moving mechanism 16 and the angle setting mechanism 15B.

  The present invention can be applied to a cutting method, cutting program, automatic generation program, control system, cutting device, and method of manufacturing a workpiece, in which a micro joint is left to cut a workpiece.

100 cutting device 2 torch (cutting torch)
Reference Signs List 3 surface plate 10 torch holding member 15A turning mechanism 15B angle setting mechanism 16 moving mechanism 16X axial direction moving mechanism 16Y axial direction moving mechanism 16Z axial direction moving mechanism 20 control system 21 input unit 22 computing unit 24 memory unit 26 driver B micro joint

Claims (9)

A cutting method of dividing a processing scheduled trajectory into a first processing trajectory and a second processing trajectory, forming a micro joint between the first processing trajectory and the second processing trajectory, and cutting a workpiece by laser irradiation And
A first processing groove forming step of forming a first processing groove along the first processing trajectory extending from a start point of the processing planned trajectory to a first division point located on the processing planned trajectory;
It extends from the second division point located at an end point side of the processing planned locus with respect to the processing planned locus at the end point side of the processing planned locus from the second dividing point to the end point of the processing planned locus A second machined groove forming step of forming a second machined groove along the second machining locus;
At least one of the first division point and the second division point, the material to be processed is penetrated to the remaining material planned portion side to be cut from the product planned portion, and the processing schedule is a direction orthogonal to the penetrating direction A through hole forming step of forming a through hole having a width of 3 mm or more in a direction from the locus toward the remaining material planned portion;
Cutting method. After the first processed groove forming step, the second processed groove forming step, and the through hole forming step, the method further includes a micro joint cutting step of cutting the micro joint with a gas flame,
A cutting method according to claim 1. Plates for placing workpieces,
A cutting torch that irradiates a laser to cut the workpiece;
A moving mechanism for moving the cutting torch relative to the workpiece;
The processing planned trajectory is divided into a first processing trajectory and a second processing trajectory by a cutting device provided with a micro joint formed between the first processing trajectory and the second processing trajectory to form the workpiece A cutting program that cuts,
Controlling the moving mechanism to control the cutting torch;
A machining groove is formed along the first machining locus extending from a start point of the machining planned locus to a first division point located on the machining planned locus,
It extends from the second division point located at an end point side of the processing planned locus with respect to the processing planned locus at the end point side of the processing planned locus from the second dividing point to the end point of the processing planned locus Forming a processing groove along the second processing path,
At least one of the first division point and the second division point, the material to be processed is penetrated to the remaining material planned portion side to be cut from the product planned portion, and the processing schedule is a direction orthogonal to the penetrating direction Forming a through hole having a width of 3 mm or more in a direction from the locus toward the remaining material planned portion;
Cutting program. Plates for placing workpieces,
A cutting torch that irradiates a laser to cut the workpiece;
A moving mechanism for moving the cutting torch relative to the workpiece;
An automatic generation program for changing and adding a processing planned trajectory in a cutting apparatus provided with
Dividing the planned machining locus into a first machining locus and a second machining locus;
The first machining locus extends from a start point of the planned machining locus to a first dividing point located on the planned machining locus.
The second processing locus is the processing from the second division point located between the first division point and the end point side of the planned processing locus with respect to the first division point on the processing planned locus. It extends to the end point of the planned trajectory,
The work material is penetrated to the remaining material planned part side to be cut from the product planned part at least one of the first division point and the second division point, and the processing plan is a direction orthogonal to the penetrating direction Add a processing trajectory that forms a through hole having a width of 3 mm or more in a direction from the trajectory toward the remaining material planned portion,
Automatic generation program. The number of divisions of the planned machining locus is determined based on the length from the start point to the end point of the planned machining locus.
The automatic generation program according to claim 4.   A control system comprising the cutting program according to claim 3.   A control system comprising the automatic generation program according to claim 4 or 5.   A cutting device comprising the control system according to claim 6 or 7. The planned machining trajectory is divided into a first machining trajectory and a second machining trajectory, a micro joint is formed between the first machining trajectory and the second machining trajectory, and the workpiece is cut by laser irradiation. A method of manufacturing a workpiece,
A first processing groove forming step of forming a first processing groove along the first processing trajectory extending from a start point of the processing planned trajectory to a first division point located on the processing planned trajectory;
It extends from the second division point located at an end point side of the processing planned locus with respect to the processing planned locus at the end point side of the processing planned locus from the second dividing point to the end point of the processing planned locus A second machined groove forming step of forming a second machined groove along the second machining locus;
At least one of the first division point and the second division point, the material to be processed is penetrated to the remaining material planned portion side to be cut from the product planned portion, and the processing schedule is a direction orthogonal to the penetrating direction A through hole forming step of forming a through hole having a width of 3 mm or more in a direction from the locus toward the remaining material planned portion;
Method of manufacturing work material.

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