CN103842921B - Production schedule device and production schedule method - Google Patents

Abstract

Production schedule device of the present invention uses the so multiple cutting apparatus of lathe, drilling machine, multiaxis NC processing unit (plant) that engineering shop is arranged effectively, and the handling capacity that determines the processing operation in order to make to put into the workpiece in engineering shop is maximum and distribute to the operation of each cutting apparatus. Production schedule device possesses: the unit of registering the machining area of each cutting apparatus; Make the NC data that the machining area of registered each cutting apparatus is processed, carry out the scheduling of engineering shop, the unit of the handling capacity of calculating machine job shop, the running rate of each cutting apparatus; According to the running rate of processing unit (plant), register the unit of the correction solution of the machining area of each cutting apparatus; Decision obtains the unit of the allocative decision of the machining area of maximum handling capacity.

Description

Production planning device and production planning method

technical field

The present invention relates to the technical field of CAM (Computer Aided Manufacturing: computer-aided manufacturing) software, and has the function of effectively using a plurality of cutting processing devices such as lathes, drilling machines, and multi-axis NC processing devices installed in machining workshops. The throughput of machining operations of workpieces put into the machine shop is maximized and assigned to the operations of the respective cutting processing devices.

Background technique

As background art in this technical field, there is Japanese Patent Laid-Open No. 2002-149223. In this bulletin, it is described that "accurately corresponding to the short delivery period, the production plan of steel products is made in a short time. The product order is input through the order input unit, and the passing process of the product is determined by the process determination unit, and the production plan is formed. The unit obtains the fixed delivery time and energy rate of each passing process according to the passing process of the product order, and accumulates it according to the delivery time of the product order to determine the passing timing and processing time of each passing process, and according to it, the time sequence of each process Accumulate the processing time of each product order accurately, calculate the operating rate of each equipment, and then determine whether the capacity exceeds the process. The period and capacity of the processing in this process are allocated in half to the landslide processing of the passing timing before and after the pass, and the ability is exceeded, and the operation rate of each process is calculated after adjustment. When there is no capacity exceeding the process, the pass at this time timing and processing time to create a production plan" (see abstract).

In addition, there is Japanese Unexamined Patent Publication No. 2001-318711 (Patent Document 2). In this publication, it is described that "provide a scheduling device that not only eliminates the overload during schedule planning, but also eliminates the insufficient load so that it does not become an excess of production capacity, and can perform load equalization. It has: an initial task accumulation unit, It implements the initial accumulation of tasks in each process necessary for the manufacture of the product; the trough search unit searches for the minimum trough which is the part with the lowest load within the planning period accumulated by the initial task accumulation unit; the adjacent peak search unit , which searches for a peak adjacent to the above-mentioned minimum trough; a load averaging processing unit which moves tasks existing between the above-mentioned adjacent peaks and the minimum trough to the above-mentioned minimum trough by a predetermined method to perform load averaging; degree evaluation unit, which evaluates the load leveling processing result of the above-mentioned load leveling process unit; the end determination unit, which executes the process end determination based on the result of the leveling evaluation; and the plan output unit, which outputs the load leveling process result” (see abstract).

In addition, there is JP-A-62-295116 (Patent Document 3). In this publication, it is described that "to provide a practical processing area division processing device for an automatic processing machine, which classifies and concentrates the processing area other than holes, and automatically divides it into simple shapes by adding processing accuracy and processing efficiency. The automatic A processing area division processing device of a processing machine automatically divides a processing area into a simple area shape corresponding to a tool used, the processing area division processing device of an automatic processing machine includes: a processing area reference data memory, which prepares for determination of area division Standards and setting standards; an area shape determination unit that determines the area shape by setting the processing area as groove processing, side groove processing, side processing, and pocket processing; The processing range and depth of the set processing area data are studied according to the above-mentioned processing area reference data whether it can be divided correspondingly to the tool used; The processing area data determined to be divisible is divided into side face, bottom face, and upper face; processing area data storage, which archives the processing area data processed by the processing area division processing unit" (see abstract, rights Require).

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2002-149223

Patent Document 2: Japanese Patent Laid-Open No. 2001-318711

Patent Document 3: Japanese Patent Application Laid-Open No. 62-295116

Contents of the invention

The problem to be solved by the invention

Both of Patent Document 1 and Patent Document 2 disclose a method of distributing load among processes by paying attention to the operating rate of each process. However, it is not a method of reconfiguring the processing areas assigned to the respective cutting devices to distribute the load as in the present invention.

In addition, Patent Document 3 discloses a technique of dividing a processing area and assigning a plurality of processing machines focusing on processing characteristics. However, as in the present invention, it is not a method of reconfiguring the processing area assigned to each cutting device while paying attention to the operating rate of each cutting device to distribute the load.

Multiple cutting devices such as lathes, drills, and multi-axis NC processing devices installed in machining workshops are used to process cylindrical products according to the structure and cutting tools of these machines. It is responsible for the processing of products with various hole shapes. In addition, the fixed multi-axis NC processing device is responsible for the processing of various planes, curved surfaces, pocket structures, groove structures, and free-form surfaces. In fact, including other special processing, there are many finished products that are uniquely determined by the cutting device used.

However, in the process of making a product from a material into an intermediate product through rough machining, and then finishing the intermediate product through finished product processing, there is an overlapping area that can be processed by a plurality of cutting devices, especially in the area of rough machining.

When multiple cutting devices such as lathes, drills, and multi-axis NC processing devices installed in the machining workshop are used to efficiently process multiple workpieces, it is difficult to determine which processing area should be assigned to which device and perform machining. The throughput of the workshop is the biggest problem.

The reason is that the work is concentrated in one cutting machine, while the work is not allocated to other cutting machines, and the work man-hours (the amount of each work) are not balanced among the machines.

The present invention provides a CAM system, which supports the following operations, that is, the scheduling of the machining shop for the process design plan obtained by allocating the processing area of the workpiece to a plurality of cutting processing devices in the machining shop, and the processing of each cutting device Evaluate the operation rate of the machine, and correct the distribution of the processing area among the cutting processing devices.

means of solving problems

In order to solve the above-mentioned problems, for example, the configuration described in the claims is adopted.

In order to solve the above-mentioned problems, in the present invention, a production planning device is constituted, which includes: providing a man-machine interface that displays the shape of the product and the shape of the material in contrast, and defines the processing area on the material shape, and registers the processing area of each cutting processing device unit; create NC data for processing the processing area of each registered cutting processing device, schedule the machining workshop, and calculate the throughput of the machining workshop and the operating rate of each cutting processing device; provide a unit for the above-mentioned The man-machine interface that corrects and defines the processing area of the cutting processing device so that the processing area having the calculated maximum operation rate as the attribute value is reduced and the other processing area is enlarged, and registers the corrected solution of the processing area of each cutting processing device A unit; a unit that compares the processing area of each cutting device with the throughput of the machining shop obtained through the scheduling of the machining shop in each of the corrected solutions, and determines the allocation plan of the processing area that obtains the maximum throughput.

In addition, in order to solve the above-mentioned problems, in the present invention, the production planning device is equipped with: providing processing feature definition tools classified into lathes, drilling machines, and multi-axis NC processing devices on the human-machine interface, and accepting user's feedback on the application of each The definition of the processing area after the feature is processed, the selection of the processing machine, the tool, and the processing conditions, these data are associated, and the units of the processing area of each cutting processing device are registered.

In addition, in order to solve the above-mentioned problem, in the present invention, the production planning device is equipped with: read the processing area data of each cutting processing device registered, generate a tool path for processing the processing area according to the processing conditions and tool conditions, and The tool path and processing machine conditions generate NC data, perform processing simulation on the above NC data to calculate the processing time, schedule the machining workshop based on the above data, and calculate the throughput of the machining workshop and the operating rate of each cutting device.

In addition, in order to solve the above-mentioned problems, in the present invention, the production planning device is equipped with: providing a unit on the man-machine interface that calls the processing features that define the registered processing area and corrects the parameters, accepts the correction of the processing area, and calculates the parameters before the correction. A unit that presents the correction effect of the machining area of each cutting processing device and the removal amount of the machining area after correction.

Invention effect

According to the present invention, it is possible to effectively use a plurality of cutting machines such as lathes, drills, and multi-axis NC machining devices installed in the machine shop, and determine the Assignment of jobs to each cutting device.

Description of drawings

FIG. 1 is a diagram showing a schematic view of a production planning device as one embodiment of the present invention.

FIG. 2 is a diagram showing a processing condition data table as one embodiment of the present invention.

FIG. 3 is a diagram showing a tool condition data table as one embodiment of the present invention.

FIG. 4 is a diagram showing a device condition data table as one embodiment of the present invention.

FIG. 5 is a diagram showing a processing characteristic data table as one embodiment of the present invention.

FIG. 6 is a diagram showing a processing characteristic example (1) as one embodiment of the present invention.

FIG. 7( a ) is a diagram showing a processing feature example (2) as one embodiment of the present invention.

FIG. 7( b ) is a diagram showing a processing characteristic example (3) as one embodiment of the present invention.

FIG. 8 is a diagram showing an example of a product CAD model and an example of a material CAD model as one embodiment of the present invention.

FIG. 9 is a diagram showing a production plan data table as one embodiment of the present invention.

FIG. 10 is a diagram showing an area generation rule data table as one embodiment of the present invention.

FIG. 11 is a diagram showing a flowchart of a process of allocating machining areas to a plurality of cutting machines so as to maximize the throughput of a machine shop, as one embodiment of the present invention.

FIG. 12 is a diagram showing a processing area allocation rule registration screen as one embodiment of the present invention.

FIG. 13 is a diagram showing a processing area allocation rule modification screen as one embodiment of the present invention.

FIG. 14 is a diagram showing a flowchart of processing area allocation rule registration processing as one embodiment of the present invention.

FIG. 15 is a diagram showing a flowchart of processing area allocation rule modification processing as one embodiment of the present invention.

FIG. 16 is a diagram showing a man-machine interface screen of machining shop throughput evaluation processing as one embodiment of the present invention.

FIG. 17 is a diagram showing a data table of throughput evaluation results as one embodiment of the present invention.

18 is a diagram showing an example of a CAD model of an intermediate processed product after lathe processing and after drilling processing as one embodiment of the present invention.

FIG. 19 is a diagram showing a hardware configuration as an embodiment of the present invention.

detailed description

Hereinafter, one embodiment of the present invention will be described using the drawings.

FIG. 1 is a schematic diagram of a production planning device 100 as one embodiment of the present invention. As shown in the figure, the production planning device 100 includes a calculation unit 101 , a storage unit 102 , an input unit 103 , an output unit 104 , and a communication unit 105 . The communication unit 105 of the production planning device 100 is connected to the three-dimensional CAD device 130 and the NC processing machine 140 via the network 150 .

The calculation unit 101 includes an area generation rule registration unit 110, a three-dimensional CAM unit 111, a machining area model generation unit 112, a tool path generation unit 113, a removal amount calculation unit 114, a machining time calculation unit 115, a machining shop scheduling unit 116, and a machining simulation unit. Section 117.

The storage unit 102 has a processing condition data storage area 120, a tool condition data storage area 121, an equipment condition data storage area 122, a processing feature data storage area 123, a product CAD model storage area 124, a material CAD model storage area 125, and a production planning data storage area. area 126 , area generation rule storage area 127 , and NC data storage area 128 .

For example, by including a CPU (central processing unit) 901, a memory 902, and an external storage device 903 such as an HDD (hard disk drive) as shown in FIG. common computer such as a reading device 908 for reading and writing information, an input device 906 such as a keyboard and a mouse, an output device 907 such as a display, and a communication device 905 such as a NIC (Network Interface Card) connected to a communication network 909 900, to implement the production planning device 100 described above.

The machining condition data storage area 120 stores cutting machining conditions in advance in the machining condition data table 120a when all the cutting machining devices in the machine shop are used. For example, in this embodiment, the processing condition data table 120a as shown in FIG. 2 is stored. As shown in the figure, the machining condition data table 120a has a machining condition number column 120b, a number of rotations column 120c, a feed rate column 120d, a single feed rate column 120e, a cutting speed column 120f, a shaft cutting column 120g, and a radial cutting column 120h.

The number of rotations column 120c stores information specifying the number of rotations of the tool under the conditions determined from the machining condition number column 120b.

The feed rate column 120d stores information specifying the feed rate of the tool under the conditions determined from the machining condition number column 120b.

The single-cut feed column 120e stores information specifying the feed amount per tool of the tool under the conditions determined from the machining condition number column 120b.

The cutting speed column 120f stores information specifying the cutting speed of the tool under the conditions specified by the machining condition number column 120b.

The shaft cutting column 120g stores information specifying the depth of cutting in the axial direction of the tool under the conditions specified by the machining condition number column 120b.

The radius cutting column 120h stores information for specifying the radial cutting amount under the conditions specified by the processing condition number column 120b.

Returning to FIG. 1 , in the tool condition data storage area 121 , information on tools used by all the cutting devices in the machine shop is stored in the tool condition data table 121 a in advance. For example, in the present embodiment, the tool-by-tool condition data table 121a as shown in FIG. 3 is stored.

As illustrated, the tool condition data table 121a has a tool number column 121b, a diameter column 121c, a lower radius column 121d, a tool length column 121e, a bracket diameter column 121f, and a bracket length column 121g.

The diameter column 121c stores information specifying the tool diameter under the conditions determined from the tool number column 121b.

The lower radius column 121d stores information specifying the lower diameter of the tool under the conditions determined from the tool number column 121b.

The tool length column 121e stores information specifying the length of the tool under the conditions determined from the tool number column 121b.

The bracket diameter column 121f stores information specifying the diameter of the bracket under the conditions determined from the tool number column 121b.

The stand length column 121g stores information specifying the length of the stand under the conditions determined from the tool number column 121b.

Returning to FIG. 1 , in the device condition data storage area 122 , device information of all cutting machines in the machining shop is stored. For example, in this embodiment, the device condition data table 122a as shown in FIG. 4 is stored.

As shown in the figure, the device condition data table 122a has a processing machine number column 122b, a processing machine name column 122c, an axis structure column 122d, and a stroke column 122e.

In the processing machine number column 122b, the processing machine number that is identification information for specifying the cutting processing machine is stored.

Information for specifying the processing machine name of the processing machine is stored in the processing machine name column 122c.

Information specifying the shaft configuration of the processing machine is stored in the shaft configuration column 122d.

In the stroke column 122e, information specifying the stroke, which is the operating range of each axis of the processing machine, is stored.

Returning to FIG. 1 , machining feature data used when defining a machining area is stored in the machining feature data storage area 123 . The machining feature represents a unit of one area machined by one tool, for example, a cylindrical shape machined by one turning tool, one hole drilled by one drill, one crossing area cut by one end mill, and the like. In this embodiment, the standard processing features are registered in the data table in advance, and an appropriate processing feature is selected from the man-machine interface screen, and used when defining the processing area in the material CAD model.

For example, in this embodiment, processing feature data such as those shown in FIG. 6 , FIG. 7( a ), and FIG. 7( b ) are registered in the processing feature data table 123 a shown in FIG. 5 .

As shown in the figure, the machining feature data table 123a has a machining feature number column 123b, a machining feature name column 123c, a parameter column 123d, a positioning representative point column 123e, and a shape model column 123f.

The number specifying the machining feature is stored in the machining feature number column 123b.

A number specifying a machining feature name is stored in the machining feature name column 123c.

Parameter variables defining the dimensions of the machined feature are stored in the parameter column 123d.

In the positioning representative point column 123e, representative point information of the processing feature used when the processing feature is positioned in the material CAD model to create the processing region is stored.

In the shape model column 123f, shape model information used when displaying a machining feature on the display screen of a man-machine interface and defining a machining shape is stored.

Returning to FIG. 1 , the product CAD model storage area 124 stores three-dimensional CAD data representing the finished shape of each product. Store data in any one or two forms of surface model and solid model. The three-dimensional CAD data created in the three-dimensional CAD device 130 is received and stored via the communication unit. For example, in this embodiment, the product CAD model 801 of the product name X001A as shown in FIG. 8( a ) is stored.

The product CAD model storage area 124 stores, for example, a DXF file. In the element definition part (ENTITIES), the surface model is defined as each graphic element constituting the drawing, and in the block definition part (BLOCK), the solid model is defined as a block graphic element. . In the present invention, it is not particularly limited to the CAD file format.

The material CAD model storage area 125 stores three-dimensional CAD data representing the material shape of each product. Store data in any one or two forms of surface model and solid model. The three-dimensional CAD data created in the three-dimensional CAD device 130 is received and stored via the communication unit. For example, in the present embodiment, a material CAD model 802 as shown in FIG. 8( b ) is stored. The file format of the material CAD model storage area 125 is also stored in the same file format as that of the product CAD model storage area 124 described above.

Returning to FIG. 1 , in the production plan data storage area 126 , production plan information for performing machining in a machining workshop is stored. For example, in this embodiment, the production plan data table 126a as shown in FIG. 9 is stored. In the production plan data table 126a, a production plan number for identifying a series of production plans, each plan day, and a production plan amount 126e for each product name are stored.

Returning to FIG. 1 , in the area generation rule storage area 127 , information specifying an area generation rule for defining a processing area registered by the area generation rule registration unit 110 is stored. For registration of area generation rules, for example, in this embodiment, a human-machine interface such as a processing area allocation rule registration screen 300 shown in FIG. 12 is presented to the user, and area generation rules (processing area allocation rules) are registered according to user input.

For area generation rules (processing area allocation rules), use a processing feature to define a processing area for materials, and then define which processing machine, which tool, and which processing conditions are used to process the processing area, and register processing in association Area information, processing machine selection information, tool selection information, and processing condition selection information. Furthermore, in a series of machining operations from material to product by combining multiple machining areas defined by one machining feature, one area generation rule is used to combine multiple machining areas (defined by multiple machining features) cut by each machining machine number for extended management.

The region generation rule data table 127a shown in FIG. 10 has a region generation rule number column 127b, a processing feature number column 127c, a processing feature representative point coordinate column 127d, a processing feature posture vector column 217e, a processing feature parameter value column 127f, and a processing condition selection column. Column 127g, tool selection column 217h, processing machine selection column 127i, and processing area CAD model column 217j.

In the area generation rule number column 127b, information for specifying an area generation rule number to be added to a combination of processing areas processed by a series of processing operations is stored.

Information specifying the machining feature number selected when defining one machining area is stored in the machining feature number column 127c.

The processing feature representative point coordinate column 127d stores the X-Y-Z coordinate values of the representative point when there is a representative point determined for specifying the position of each processing feature to define the processing area of the processing feature.

Posture vector information indicating the posture of the machining feature on the X-Y-Z coordinate axes when defining the machining area of the machining feature is stored in the machining feature posture vector column 217e.

In the machining feature parameter value column 127f, the dimension values actually defined for each parameter variable of the machining feature when defining the machining area of the machining feature are stored.

The machining condition number applied when machining the machining area defined by the machining feature is stored in the machining condition selection column 127g.

The tool number used when machining the machining area defined by the machining feature is stored in the tool selection column 217h.

The processing machine number used when processing the processing area defined by the processing feature is stored in the processing machine selection column 127i.

The CAD model information representing the processing area defined by the processing feature is stored in the processing area CAD model column 217j.

Based on the flow chart of FIG. 11 , it will be explained that using the production planning device 100 of the present invention, effectively utilizing all the cutting devices in the machining shop, and assigning processing areas to a plurality of cutting devices so that the throughput of the machining shop can be explained. Maximum processing steps.

In step 200 , a machining area allocation rule for machining a product (workpiece) to be evaluated is created and registered using a cutting machine owned by a machine shop. Here, it is necessary to create at least one plan for each product (workpiece) for the processing area allocation rule, and it is ideal to create a plurality of plans when there are other solutions, and compare the results of respective throughputs.

In order to create and register the processing area allocation rule, in the present invention, a man-machine interface of the processing area allocation rule registration screen 300 shown in FIG. 12 is provided. The processing area allocation rule registration screen 300 includes a CAD model display area 301 where a product CAD model and a material CAD model (intermediate processed product CAD model) are displayed in comparison at the same position on the same coordinate axis.

FIG. 14 shows a flowchart of processing area allocation rule registration processing.

In step 400, target product and rule number are specified. In FIG. 12 , the number of the processing area allocation rule is newly specified as "1", and the target product is uniquely specified as "X001A".

In step 401, the information of the corresponding product CAD model and material CAD model is used as input, and the display shown in FIG. 12 is performed.

The area that should be processed is determined as the area left by subtracting the product CAD model from the material CAD model. However, in this embodiment, the processing feature is selected to be superimposed on the material CAD model. The selection unit of the mouse and The input unit of the input unit 103 not displayed on the screen performs positioning, size change, posture change, etc. of the processing feature, and finally defines the processing area by the processing feature on which the positioning and parameter values are determined.

In the embodiment shown in FIG. 12 , the following situation is shown, that is, by clicking the multi-choice box or the single-choice box of the lathe machining feature selection part 304 with the mouse to display the pull-down menu, and display the information registered in the machining feature data storage area 123. For a list of machining features related to lathes, the machining features of a cylinder are selected. Upon receiving the selection input of the machining feature, the system reads the shape model 123f of the machining feature number 1 in the machining feature table 123a, and displays the cylindrical machining feature on the material CAD model in FIG. 12 . The processing feature is not shown in FIG. 12 , but the user uses the processing feature operation unit provided by the three-dimensional CAM unit 111 to superimpose and display the processing feature on the material CAD model to determine the processing area. In addition, the machining features are not included in the material CAD model, defining the repeated area as the machining area. Furthermore, in the processing machine selection part 307, the processing machine number is selected as "3" from the menu of the contents of the device condition data table 122a, and in the tool selection part 308, from the menu of the contents of the tool condition data table 121a, The tool number is selected as "7", and in the processing condition selection unit 309, the processing condition number is selected as "10" from the menu in the contents of the processing condition data table 120a.

When a machining feature is defined and a parameter value is also input, by pressing the machining feature determination button 310, the data of the machining area of the corresponding machining feature is registered as in the second row of the area generation rule data table 127a. In addition, in the machining area CAD model column 127j, a CAD model representing an overlapping area of the machining feature and the material CAD model is formed and stored.

The material CAD model is lathe-processed by the above-mentioned determination processing of the processing characteristics, and the intermediate processed product CAD model 803 shown in FIG. 18( a ) is displayed on the material CAD of FIG. In the display area 301 of the model and the intermediate processed product CAD model.

Next, the user pays attention to the processing of the drilling machine, and selects the processing characteristics of the drilling machine through the drilling processing adjustment selection unit 305 in the same manner as the above operation, and the system accepts the selection, and displays the processing characteristics of the hole processing on the intermediate processed product CAD model superimposed on it. The user positions the hole machining feature, determines the parameter value, and after selecting the machining machine, the tool, and the machining condition, clicks the machining feature determination button 310 to register the machining area. As shown in the third line of the area generation rule data table 127a in FIG. 10, the machining area of the drill is defined. In addition, the hole processing of the drilling machine is not limited to one position, and holes are drilled at predetermined intervals so that a part of the area overlaps. These are created repeatedly by the function of duplication, and data with different coordinate values of the representative points are registered in the area generation rule data table 127a. As a result of registering all the machining areas for drilling machining, for example, the intermediate processed product CAD model 804 shown in FIG. 18( b ) is displayed in the display area of FIG. 12 .

Next, the user selects the machining feature of the multi-axis NC machining apparatus through the multi-axis NC machining apparatus machining feature selection unit 306 in the same manner as described above. For example, in the case of machining feature number 28 of a free-form surface, a desired free-form surface element can be extracted from the product CAD model as a machining feature. In addition, if rough machining is specified, a free-form surface with a predetermined offset from the free-form surface of the product CAD model is created, and if finished product machining is specified, a machining feature along the free-form surface of the product CAFD model is created.

As mentioned above, in step 402, a machining feature is selected to define a rough machining area of a lathe or a drill, and a product machining area.

Next, in step 403, a machining feature is selected to define a rough machining area and a finished machining area of the multi-axis NC machining device.

If the definition of all processing areas is finished, click the registration button 312 of the processing area allocation rule in FIG. 12 to complete the registration of the processing area allocation rule of the specified rule number 1. At this time, a CAD model of the processing area obtained by combining all the processing areas is created and stored in the area generation rule data table.

In step 200 of FIG. 11 , one or more processing area allocation rules are created for each product (workpiece). Then, when a plurality of products (workpieces) are loaded into the machine shop, different processing area allocation rules are created for each product (workpiece) and registered with different numbers.

In step 201 of FIG. 11 , the man-machine interface screen of the machine shop throughput evaluation process of FIG. 16 is displayed.

The user selects the area generation rule number 127 b from the pull-down menu 601 for the processing area allocation rule of the product (workpiece) to be processed for evaluation. When there are multiple rules, specify all the rule numbers. Moreover, in the production plan selection part 602, the production plan number is designated from the production plan data table 126a with respect to the production plan used for this evaluation.

From the pull-down menu of the machining shop equipment structure section 605, the user can select the equipment that is not related to the processing of the evaluation target product or the equipment that will not operate during the evaluation target period among all the cutting processing devices that constitute the machining shop. Exclude, and select the cutting processing device of the evaluation object.

The user can select a processing order from a pull-down menu in the processing order selection section 603 . When creating the area generation rule (processing area allocation rule), the processing order is determined in accordance with the definition order of the processing area of the processing feature, but it can be changed in the processing order selection part 603. For example, in FIG. 16, it is specified that the first Lathe processing, followed by drilling machine processing.

The user further selects and specifies a product to be evaluated in the input product selection unit 604 , and selects and specifies a scheduling period 606 and an operating time zone 607 of a machining workshop.

After the above settings are made, the evaluation start button 608 is clicked to start the throughput evaluation process in the machine shop.

In step 201 of FIG. 11 , upon receiving the start of the throughput evaluation process of the machine shop, the toolpath generating unit 113 reads out the area generation rule data, processing condition data, and tool condition data specified by the processing area assignment rule of the evaluation object, Generate toolpaths that machine all corresponding machining areas. If the lathe and the drill are NC processing machines, the tool path is created, and if not, the tool path is not created. The toolpath generating unit 113 uses an existing CAM function for creating a toolpath for a machining area CAD model.

Next, in step 202 , the three-dimensional CAM unit 111 creates NC data for each cutting machine based on the created tool path data and the machine condition data selected from the machine number. The created NC data is stored in the NC data storage area 128 . NC data creation processing uses existing CAM functions.

Next, in step 203 , the machining time calculation unit 115 executes machining simulation for each cutting machine by the machining simulation unit 117 with respect to the NC data created above, and calculates machining time. In addition, if the lathe and the drilling machine are NC processing machines, the processing time is calculated with reference to the operator's standard delivery time. The processing simulation unit 117 uses an existing CAM function.

Next, in step 204 , the workshop scheduling unit 116 creates a simulation model of the machining process in the machining workshop on the computer. In this model, the cutting device selected by the user, the input of workpieces according to the production plan data, the cutting process of the processing area according to the area generation rule (processing area allocation rule), the process route according to the processing order, etc. are reproduced on the computer. Scheduling period and operation time period (in this embodiment, the operator's work plan, operator's skill difference, etc. are not considered), thereby simulating the overall time passage of the machining process in the machining workshop, and making input into the machining workshop Progress plan for all artifacts. Based on the progress plan of all the workpieces produced, the throughput of the machine shop and the cutting equipment during the scheduling period are classified into categories such as lathes, drill machines, and multi-axis NC machining equipment, and the operation of the cutting equipment belonging to each category is calculated. rate average.

The throughput evaluation results are displayed on the man-machine interface, for example, based on the data table 610 shown in FIG. 17 . As for the processing area allocation rule to be evaluated, 1 and 2 are specified first and the evaluation is performed, so the evaluation results with the processing area allocation rule numbers 1 and 2 are displayed in the data table 610 of FIG. 17 .

Next, in step 205, the user compares the evaluation results of the two processing area allocation rules in Fig. 17, and it can be known that they are both multi-axis NC processing devices with the highest operating rates of 76% and 77.5%. The NC machining device becomes the bottleneck to increase the throughput. In addition, it can be judged that the throughput of the processing area allocation rule number 2 is slightly higher, and there is room for further improving the operation rate of the drilling machine processing operation by correcting the shape of the processing area, and it can be predicted that the processing of the multi-axis NC processing device will be relatively reduced. The operating rate of the job. Therefore, it is further determined that there is a processing area allocation rule that improves throughput.

Therefore, in step 206 , the process moves to the next step 207 .

Next, in step 207, a rule is assigned to each processing area, the operating rate of the lathe is stored as an attribute value representing the amount processed by the lathe, and the operating rate of the drilling machine is stored as an attribute value representing the amount processed by the drilling machine, and The operating rate of the multi-axis NC machining device is stored as an attribute value indicating the amount of machining by the multi-axis NC machining device.

Next, in step 208 , the production planning device 100 displays the processing area allocation rule modification screen 320 shown in FIG. 13 on the man-machine interface screen. In the processing area allocation rule modification screen 320, the CAD model display area 321 is provided similarly to the processing area allocation rule registration screen 300, and here, the product CAD model and the material CAD model ( Intermediate processed product CAD model).

FIG. 15 shows a flowchart of processing area allocation rule modification processing.

In step 500, target product and rule number are specified. In FIG. 13 , the rule number display unit 322 specifies and inputs a processing area allocation rule whose number "2" of the already evaluated processing area allocation rule is corrected to a new number "3".

The production planning device 100 accepts the specified input of the rule number, reads the data of the already created processing area allocation rule "2" from the area generation rule data table 127a, and lists the processing area in the pull-down menu of the drilling machine processing feature selection part 325, for example. Assign the processing feature number of rule "2" to accept the user's choice. In FIG. 13 , the case where the drilling feature number "12" is specified and corrected is shown. There are multiple processing features numbered "12". Through the input unit of the input unit 103 not shown in the screen of FIG. 13 , the user performs modification of the arrangement of the machining feature numbered "12" (modification of representative point coordinates), modification of parameter values, and the like. Alternatively, the addition of a new machining feature may be instructed from the drill machining feature selection unit 325 . In the correction process, the CAD model of the intermediate processed product in the CAD model display area 321 always displays the corrected shape in order to confirm the corrected machining region of the machining feature.

When the modification of the machining feature of the drilling machine is completed, the user clicks the decision button 332 of the machining feature, and the area generation rule registration unit 110 registers a new data record of the new area generation rule number "3" in the area generation rule data table. Similarly, the machining feature selection unit 323 of the lathe and the machining feature selection unit 327 of the multi-axis NC machining device can be instructed to modify the machining features, and a new data record of the new area generation rule number "3" can be registered in the area generation rule data table. . During correction processing of these machining features, if there is data to be corrected in the machining machine correction selection unit 329 , the tool correction selection unit 330 , and the machining condition correction selection unit 331 , the machining features are determined after correction. Then without modification, the existing data of the area generation rule number "2" is copied.

As described above, when the machining feature determination button 332 is clicked after the machining feature correction process is completed, the area generation rule registration unit 110 calculates the area generation rule number “2” before correction through the removal amount calculation unit 114, respectively. ” and the machining amount of the drilling machine with the area generation rule number “3” after correction, and the machining removal amount before correction and after correction are displayed in comparison in the drilling machine machining amount correction unit 326 . For example, the unit is mm ³ . At this time, for the machining area of other lathes and multi-axis NC machining equipment, the machining area of the drill machine changes even if the machining characteristics are not corrected, and this may change relatively. Therefore, the area generation rule number "2" is used. Some data are calculated by the removal amount calculation unit 114 , and the machining removal amounts before and after correction are displayed in comparison in the lathe machining amount correction unit 324 and the multi-axis NC machining amount correction unit 328 . In the display example of FIG. 13 , it can be seen that the removal amount does not change in the lathe machining amount correction unit 324 , but decreases in the multi-axis NC machining amount correction unit 328 . The processing of the removal amount calculation unit 114 creates NC data and performs calculations by machining simulation processing, but uses an existing CAM function.

In step 501 of FIG. 15, correction, new addition, deletion, etc. of processing features of lathes, drills, and multi-axis NC processing devices are successively accepted, and responses are made so that the user can always see the shape of the corrected intermediate processed product CAD model. , in step 502, as mentioned above, according to the processing area data of the modified or newly added processing features, for other processing areas, refer to the area generation rule data before correction, calculate the removal amount of each cutting processing device, and compare Prompt to the user the removal amount before and after correction.

In step 503 of FIG. 15 , wait for the instruction of the user to click on the modification registration button 334 of the processing area allocation rule, and if the modification registration instruction is accepted, then transfer to step 504, and perform modification of the new number "3" after modification. Registration of processing area allocation rules. In step 503, if there is further instruction such as correction, the process goes to step 501.

In step 208 of FIG. 11 , the processing area allocated to each cutting processing device is reset so that the processing area having the largest operating rate of the cutting processing device as an attribute value is reduced (that is, the removal amount is reduced), and the processing area is increased. Machining area of other machining devices (i.e. increased removal). Then, the revised new processing area allocation rule is registered in the area generation rule data table 127a.

Next, transfer to step 201 again, the production planning device 100 presents the machining shop throughput evaluation screen 600 to the user, and the user designates the newly revised and registered rule number "3" in the selection area 601 of the processing area allocation rule to be evaluated. ", other setting items are the same as the previous evaluation, so no correction is made, and the evaluation process is instructed by the evaluation start button 608. The production planning device 100 executes the processing of steps 201, 202, 203, and 204 based on the processing area allocation rule (area generation rule) number "3" data according to the instruction to start the evaluation, and classifies the throughput of the machining workshop, and For categories such as lathes, drills, and multi-axis NC machining devices, the average of the operating rates of cutting processing devices belonging to each category is calculated. As a result, as shown in the throughput evaluation result data table of FIG. 17 , the current processing area allocation rule "3" is displayed in parallel with the evaluation results of the processing area allocation rules "1" and "2" as the previous evaluation results. " evaluation results.

In step 205, it is evaluated that the evaluation result of the processing area allocation rule "3" this time is that the throughput is the largest. Then, it is judged that in addition to the processing area allocation rule "3", no effective and appropriate processing operation can be found to further increase the removal amount of the processing area of the lathe or the drilling machine, and the user finally determines that the processing area allocation rule "3" The machining method yielded the greatest throughput among the machine shops under evaluation.

Therefore, in step 206 , the processing step of allocating the processing areas to the plurality of cutting processing devices so that the throughput of the machine shop is maximized using the production planning device 100 is ended.

Following the above processing, the production planning device 100 reads out the processing area allocation rule "3" for each cutting device to process the processing area model stored in the NC data storage area 128 in the above processing to generate the maximum throughput. The NC data is downloaded to each NC processing machine via the communication unit 105 . In addition, based on the data registered in the area generation rule data table, a work instruction sheet or the like is created and output from the output unit 104 to a cutting device other than an NC processing machine.

As described above, according to the present embodiment, the production planning device 100 can support the effective use of multiple cutting devices such as lathes, drills, and multi-axis NC processing devices installed in the machining shop, and determine the The throughput of the processing work of the workpiece in the center is allocated to each cutting device with the largest throughput, and NC data is supplied to each NC processing machine.

Explanation of reference signs

100: Production planning device; 101: Calculation unit; 102: Storage unit; 103: Input unit; 104: Output unit; 105: Communication unit; 110: Area generation rule registration unit; 111: 3D CAM unit; 112: Processing area model Generating part; 113: Tool path generating part; 114: Removal amount calculating part; 115: Processing time calculating part; 116: Processing workshop scheduling part; 117: Processing simulation part; 120: Processing condition data storage area; 120a: Processing condition data Table; 120b: processing condition number column; 120c: revolution number column; 120d: feed rate column; 120e: single-tool feed column; 120f: cutting speed column; Condition data storage area; 121a: tool condition data table; 121b: tool number column; 121c: diameter column; 121d: lower radius column; 121e: tool length column; 121f: support diameter column; 121g: support length column; 122 : device condition data storage area; 122a: device condition data table; 122b: processing machine number column; 122c: processing machine name column; 122d: axis structure column; 122e: stroke column; 123: processing feature data storage area; 123a: processing Feature data table; 123b: processing feature number column; 123c: processing feature name column; 123d: parameter column; 123e: positioning representative point column; 123f: shape model column; 124: product CAD model storage area; 125: material CAD model storage Area; 126: production plan data storage area; 126a: production plan data table; 126b: production plan number column; 126c: plan date column; 126d: product name column; 126e: production plan quantity; 127: area generation rule storage area; 127a: Area generation rule data table; 127b: Area generation rule number column; 127c: Processing feature number column; 127d: Processing feature representative point coordinate column; 127e: Processing feature pose vector column; 217f: Processing feature parameter value column; 127g: Processing condition selection column; 127h: Tool selection column; 217i: Processing machine selection column; 127j: Processing area CAD model column; 128: NC data storage area; 130: 3D CAD device; 140: NC processing machine; 150: Network; 300 : Processing area allocation rule registration screen; 301: CAD model display area; 302: New registration rule number column; 303: Product name column; 304: Lathe processing feature selection part; 305: Drilling machine processing feature selection part; 306: Multi-axis NC Processing device processing feature selection section; 307: processing machine selection section; 308: tool selection section; 309: processing condition selection section; 310: processing feature decision button; 311: processing sequence decision button; 312: processing area allocation rule Register button; 320: processing area allocation rule modification screen; 3 21: CAD model display area; 322: Rule number display part; 323: Lathe processing feature selection part; 324: Lathe processing amount correction part; 325: Drilling machine processing feature selection part; 326: Drilling machine processing amount correction part; 327: Multi-axis NC machining device processing feature selection section; 328: multi-axis NC machining volume correction section; 329: processing machine correction selection section; 330: tool correction selection section; 331: machining condition correction selection section; 332: processing feature decision button; 333 : Correction button of processing order; 334: Correction registration button of processing area allocation rule; 600: Machining workshop throughput evaluation screen; 601: Selection area of processing area allocation rule of evaluation object; 602: Production plan selection section; 603: Processing sequence selection department; 604: Input product selection department; 605: Mechanical processing workshop device structure department; 606: Scheduling period designation department; 607: Operation time period designation department; 608: Evaluation start button; 610: Throughput evaluation result data table ;611: Processing area allocation rule number column; 612: Lathe processing operation rate column; 613: Drilling machine processing operation operation rate column; 614: Multi-axis NC processing device processing operation rate column; 615: Throughput Measurement column; 701: processing feature of cylinder; 702: processing feature of tapered cylinder; 703: processing feature of through hole; 704: processing feature of blind hole; 705: processing feature of closed pocket; 706: processing feature of open pocket; 707: open Groove processing features; 708: surface processing features; 709: free-form surface processing features; 801: product CAD model example; 802: material CAD model example; 803: intermediate processed product CAD model example after lathe processing; 804: drilling machine processing Example of CAD model of intermediate processed product; 900: computer; 901: CPU; 902: memory; 903: external storage device; 904: removable storage medium; 905: communication device; 906: input device; 907: output device; 908: reading device; 909: communication network.

Claims (10)

1. a production schedule device, is characterized in that, possesses:

Provide a kind of contrast to show shape of product and material shape and in material shape, define machining areaMan-machine interface, registers the unit of the machining area of each cutting apparatus;

Make the NC data that the machining area of registered each cutting apparatus is processed, carry out machineThe scheduling of tool job shop, the handling capacity of calculating machine job shop and the running rate of each cutting apparatusUnit;

To there is the machining area of calculated transport maximum rate as property value and expand it in order to dwindleHis machining area, provides a kind of machining area to above-mentioned each cutting apparatus to revise the man-machine of definitionInterface, and the unit of registering the correction solution of the machining area of each cutting apparatus;

Machining area to each cutting apparatus and pass through engineering shop in each this correction solutionScheduling and the handling capacity of the engineering shop that obtains compares, determine to obtain the processing of maximum throughputThe unit of the allocative decision in region.

2. production schedule device according to claim 1, is characterized in that,

Register the unit of the machining area of above-mentioned each cutting apparatus, a kind of classification is provided in man-machine interfaceFor the machining feature defining tool of the classification of lathe, drilling machine, multiaxis NC processing unit (plant), accept user's correspondenceWith the selection of the definition of the machining area after each machining feature and processing machine, instrument, processing conditions, willThese data associate, and register the machining area of each cutting apparatus.

3. production schedule device according to claim 1, is characterized in that,

Calculating the unit of the handling capacity of above-mentioned engineering shop and the running rate of each cutting apparatus readsThe machining area data of each cutting apparatus of registering, generate adding according to processing conditions and instrument conditionThe tool path that territory, work area processes, generates NC data according to tool path and processing machine condition, to upperState NC data and process simulation calculating processing time, according to machining area data, tool path,NC data and carry out the scheduling of engineering shop process time, calculating machine job shop is handled upThe running rate of amount and each cutting apparatus.

4. production schedule device according to claim 1, is characterized in that,

The unit of registering the correction solution of the machining area of above-mentioned each cutting apparatus provides in man-machine interfaceThe machining feature of the machining area that call definition has been registered the unit of corrected parameter, accept machining areaRevise, calculate before revising and the amount of removing of revised machining area, point out the processing of each cutting apparatusThe correction effect in region.

5. production schedule device according to claim 1, is characterized in that,

In the decision that obtains the unit of the allocative decision of the machining area of above-mentioned maximum throughput according to decision, rawWhile becoming the NC data of corresponding machining area, download NC data via network to NC processing machine.

6. a production schedule method, effectively use in engineering shop set be divided into lathe,Multiple cutting apparatus of the classification of drilling machine, multiaxis NC processing unit (plant), determine in order to make to put into machineryThe handling capacity of the processing operation of the workpiece in job shop is maximum and distribute to the operation of each cutting apparatus,It is characterized in that, comprising:

Providing a kind of contrasts and shows shape of product and material shape and definition processing in material shape to userThe man-machine interface in region, accepts user's definition and registers the operation of the machining area of each cutting apparatus;

Generate the NC data that the machining area of registered each cutting apparatus is processed, carry out machineThe scheduling of tool job shop, the handling capacity of calculating machine job shop and the running rate of each cutting apparatusOperation;

To there is the machining area of calculated transport maximum rate as property value and expand it in order to dwindleHis machining area, provides a kind of machining area to above-mentioned each cutting apparatus to revise definition to userMan-machine interface, accept user's correction, register the work of the correction solution of the machining area of each cutting apparatusOrder;

Machining area to each cutting apparatus and pass through engineering shop in each this correction solutionScheduling and the handling capacity of the engineering shop that obtains compares, determine to obtain the processing of maximum throughputThe operation of the allocative decision in region.

7. production schedule method according to claim 6, is characterized in that,

The operation of registering the machining area of above-mentioned each cutting apparatus is following operation, in man-machine interfaceOn the machining feature defining tool of the classification that is categorized as lathe, drilling machine, multiaxis NC processing unit (plant) is provided, connectBe subject to user's correspondence definition of the machining area after each machining feature and processing machine, instrument, processing conditionsSelection, these data are associated, register the machining area of each cutting apparatus.

8. production schedule method according to claim 6, is characterized in that,

The operation of calculating the handling capacity of above-mentioned engineering shop and the running rate of each cutting apparatus be withUnder operation, the machining area data of reading registered each cutting apparatus, according to processing conditions andInstrument condition generates the tool path that machining area is processed, raw according to tool path and processing machine conditionBecome NC data, above-mentioned NC data are processed to simulation calculating processing time, according to machining area numberAccording to, tool path, NC data and carry out the scheduling of engineering shop process time, calculating machineThe handling capacity of job shop and the running rate of each cutting apparatus.

9. production schedule method according to claim 6, is characterized in that,

The operation of registering the correction solution of the machining area of above-mentioned each cutting apparatus has following operation: existIn man-machine interface, provide the machining feature of the machining area that a kind of call definition registered and corrected parameterUnit, accepts the correction of machining area, calculates before revising and the amount of removing of revised machining area, promptingThe correction effect of the machining area of each cutting apparatus.

10. production schedule method according to claim 6, is characterized in that,

In the decision that obtains the operation of the allocative decision of the machining area of above-mentioned maximum throughput according to decision, systemWhile making the NC data of corresponding machining area, also have via network and download NC data to NC processing machineOperation.