JP2013186866A - Processing step planning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing step plan and a production plan to maximize a productivity indicator such as the operation rate of the processing machine of a processing shop to a user.SOLUTION: The processing step planning device 100 includes: means 110 for displaying and evaluating the duplicate number of use working machines in the same processing order to support processing step plan establishment in processing step planning; means 113 for selecting a processing step to maximize a productivity indicator such as an operation rate; means 114 for creating a production plan on the basis of the selected processing step; means 116 for achieving repetitive improvement to maximize the productivity indicator with respect to the created production plan; and means 117 for enabling a plan establisher to confirm the calculation result by output means 104, and to reselect the processing plan by input means 103 when it is necessary to correct the calculation result, and to recalculate the production plan.

Description

  The present invention relates to a technical field of CAM (Computer Aided Manufacturing), software for creating NC data for controlling an NC processing machine, and a technical field of a production plan for determining the input / processing date and time of parts to the NC processing machine About.

  In the machining production line, tool selection, machine selection, machining area, machining conditions, machining process plan are implemented from the drawing of the product to be produced, and the date and time of parts input to the NC machine tool is determined by the production scheduling system. NC data for controlling each NC machine tool is created.

  For example, Patent Document 1 discloses an alternative machine from processing process plan data in which process work, operation work, processing work order relations, part machine data, tool data, shape data, machining feature data, and work time data are associated. Machine line, machine tool name, shape data, machining characteristic data, and work time data, including data, are transferred to the automatic programming system, and the NC program is generated by the automatic programming system. Describes a technique for automatically generating.

JP 2001-337707 A

  In the conventional machining production line, a production plan is created after creating a machining process plan. For this reason, when creating a machining process plan, the availability of the machining machine is not known, and it is not possible to plan a machining process that equalizes the operating rate of the machining machine in the machining shop. There was a problem that the operating rate of the system would decrease. In addition, if a production plan and a machining process plan are planned at the same time, the combination becomes enormous, so there is a problem that the machining process and the production plan cannot be calculated within a practical time (tens of minutes).

  In order to solve the above-described problems, in the present invention, a machining process planning device for creating a machining process plan and a production plan for a machining shop is displayed by comparing a product CAD model and a material CAD model, and a user places the CAD model on the CAD model. A user interface that provides an input means for defining a machining area, selecting a machining condition, a tool, and a machining machine for machining the machining area, and creating machining process plan data and machining operation data; A machining process plan registration unit that references and displays the user's previously created machining operation data on the interface, and a machining process plan data storage that stores machining operation data and machining process plan data created by the user via the user interface. Read the machining process plan data from the machining process plan data storage unit. A machining process plan selection unit that selects the machining process plan that minimizes the machining time total of the machine that maximizes the machining time total within the planning period and leveles the load on the machine, and lots from the input date and time Decide the processing order of the lot, sort the lots that can be processed at the relevant date and time, the production planning department that sorts the processes from the process, sort the lots in descending order of the lead time, and change the lot allocation to reduce the lead time A production plan improvement unit that changes the production plan if a lot exists is provided.

  In order to solve the above-mentioned problem, in the present invention, an average device operation rate in each of a plurality of machining process plans evaluated by the machining process plan selection unit is compared and presented to the user, and the machining process plan is obtained from the user. When re-selection is accepted, a process plan reselection unit that repeats the processes of the production plan planning unit and the production plan improvement unit based on the reselected machining process plan is further provided.

  In addition, the present invention selects a machining process that maximizes a productivity index such as an operation rate, creates an initial plan of the production plan based on the selected machining process, and maximizes the productivity index. Is repeatedly improved.

  In the present invention, the planner confirms the calculation result by the output means, and if it is necessary to correct the calculation result, the processing step is reselected by the input means, and the production plan is recalculated. It is characterized by.

  According to the present invention, it is possible to provide a user with a machining process plan and a production plan that maximize the productivity index.

It is a figure which shows the schematic of the manufacturing process plan apparatus which is 1 implementation | achievement form of this invention. It is a figure which shows the example of a data table of the cutting conditions at the time of using a cutting apparatus. It is a figure which shows the tool information which is 1 implementation | achievement form of this invention. It is a figure which shows the apparatus information which is 1 implementation | achievement form of this invention. It is a figure which shows the input plan information which is one implementation | achievement form of this invention. It is a figure which shows the product shape information which is 1 implementation | achievement form of this invention. It is a figure which shows the raw material shape information which is 1 implementation | achievement form of this invention. It is a figure which shows the data structure of the manufacturing process plan data storage area which is one implementation | achievement form of this invention. It is a figure which shows the manufacturing process plan planning assistance screen which is 1 implementation | achievement form of this invention. It is a figure which shows the process area setting screen which is 1 implementation | achievement form of this invention. It is a figure which shows the manufacturing process plan registration screen which is one implementation | achievement form of this invention. It is a figure which shows the preparation flow of the manufacturing process plan and production plan which are one implementation | achievement form of this invention. It is a figure which shows the Gantt chart output result of the production plan which is one implementation | achievement form of this invention. It is a figure which shows the processing machine allocation Gantt chart output result which is 1 implementation | achievement form of this invention. It is a figure which shows the output result of the average operation rate of the processing machine which is 1 implementation | achievement form of this invention. It is a figure which shows the reselection screen of the manufacturing process plan which is one implementation | achievement form of this invention. It is a figure which shows the production plan output result of the production plan which is one implementation | achievement form of this invention. It is a figure which shows the production plan planning flow which is one implementation | achievement form of this invention. It is a figure which shows the production plan improvement flow which is one implementation | achievement form of this invention. It is a figure which shows the hardware constitutions which are 1 implementation | achievement form of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram of a machining process planning device 100 according to an embodiment of the present invention. As illustrated, the machining process planning apparatus 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 machining process 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 a machining process plan planning support unit 110, a three-dimensional CAM unit 111, a process plan registration unit 112, a machining process plan selection unit 113, a production plan planning unit 114, a machining time calculation unit 115, a production plan improvement unit 116, And a machining process plan reselection unit 117.

  The storage unit 102 includes a machining condition data storage area 120, a tool data storage area 121, an apparatus data storage area 122, an input plan data storage area 123, a product CAD model storage area 124, a material CAD model storage area 125, and a machining process plan data storage. Region 126.

  The machining condition data storage area 120 stores in advance in the machining condition data table 120a cutting conditions when all the cutting apparatuses in the machining shop are used. For example, in this embodiment, a machining condition data table 120a as shown in FIG. 2 is stored. As shown in the drawing, the machining condition data table 120a includes a machining condition number column 120b, a rotation speed column 120c, a feed rate column 120d, a one-blade feed column 120e, a cutting speed column 120f, and an axis cutting column 120g. And a diameter cutting column 120h.

The rotation speed column 120c stores information for specifying the rotation speed of the tool under the condition specified in the machining condition number column 120b.
The feed rate column 120d stores information for specifying the feed rate of the tool under the conditions specified in the machining condition number column 120b.
The single blade feed column 120e stores information on the feed amount per blade of the tool under the conditions specified in the machining condition number column 120b.
The cutting speed column 120f stores information for specifying the cutting speed of the tool under the conditions specified in the machining condition number column 120b.
The axis cutting column 120g stores information for specifying the cutting depth in the axial direction of the tool under the conditions specified in the machining condition number column 120b.
The diameter cutting field 120h stores information for specifying the diameter cutting amount under the conditions specified in the machining condition number field 120b.

Returning to FIG. 1, in the tool data storage area 121, a tool condition data table 121 a is stored in advance with information on tools used in all the cutting apparatuses in the machining shop. For example, in this embodiment, a tool condition data table 121a as shown in FIG. 3 is stored.
As shown in the drawing, the tool condition data table 121a includes a tool number column 121b, a diameter column 121c, a lower radius column 121d, a tool length column 121e, a holder diameter column 121f, a holder length column 121g, Have

The diameter column 121c stores information for specifying the tool diameter under the conditions specified in the tool number column 121b.
The lower radius column 121d stores information for specifying the lower radius of the tool under the conditions specified in the tool number column 121b.
The tool length column 121e stores information for specifying the tool length under the conditions specified in the tool number column 121b.
The holder diameter column 121f stores information for specifying the diameter of the holder under the conditions specified in the tool number column 121b.
The holder length column 121g stores information for specifying the length of the holder under the conditions specified in the tool number column 121b.

Returning to FIG. 1, the device data storage area 122 stores device information of all the cutting machines in the machining shop. For example, in the present embodiment, an apparatus condition data table 122a as shown in FIG. 4 is stored.
As shown in the figure, the apparatus condition data table 122a includes a processing machine number column 122b, a processing machine name column 122c, an axis configuration column 122d, a stroke column 122e, and a setup time column 122f.

The processing machine number column 122b stores a processing machine number that is identification information for specifying a cutting machine.
In the processing machine name column 122c, information for specifying the processing machine name of the processing machine is stored.
The axis configuration column 122d stores information for specifying the axis configuration of the processing machine.
The stroke column 122e stores information for specifying a stroke that is an operating range of each axis of the processing machine.
The setup time column 122f stores an average time for changing the processing machine.

Returning to FIG. 1, the loading schedule data storage area 123 stores the loading date and time information of parts. For example, in the present embodiment, an input plan data table 123a as shown in FIG. 5 is stored.
As illustrated, the input plan data table 123a includes a product column 123b, a parts column 123c, a lot number column 123d, and an input date / time column 123e.

The product column 123b stores the product name that identifies the product.
The part column 123c stores a part name for specifying a part constituting the product.
The lot number column 123d stores a lot number that is identification information for identifying a lot of parts.
The input date / time column 123e stores the input date / time specifying the date / time when each lot is input to the production line.

The product CAD model storage area 124 receives and stores product shape CAD model data (shown in FIG. 6A) representing the processed shape for each product created by the three-dimensional CAD device 130 via the network 150 and the communication unit 105. To do.
Product CAD model data is stored in, for example, the DXF file format. The face model is defined in the element definition section (ENTITIES) as each graphic element constituting the drawing, and the solid model is stored in the block definition section (BLOCKS). It is defined as a block graphic element. In the present invention, the CAD file format is not particularly limited.

  The material CAD model storage area 125 stores three-dimensional CAD data (shown in FIG. 6B) representing the material shape of each product. Stores data in either face model, solid model, or both formats. The three-dimensional CAD data created in the three-dimensional CAD device 130 is received via the communication unit and stored. For example, in the present embodiment, a material CAD model 802 as shown in FIG. 8B 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, the machining process plan data storage area 126 stores machining process plan information of parts. The user uses the user interface screen to store information on creation / input of machining process plan candidates from the product / part product CAD model and material CAD model.
For example, in the present embodiment, machining process plan data 126a as shown in FIG. 7 is stored. As shown in the figure, the machining process plan data 126a includes a product column 126b, a parts column 126c, a lot number column 126d, a machining process number column 126e, a machining process plan number column 126f, a machining operation number column 126g, The machining condition column 126h, the tool number column 126i, the machining machine column 126j, the machining time column 126k, and the machining area CAD model column 126l are stored.
The product column 126b stores the product name that identifies the product.
The part column 126c stores a part name for specifying a part constituting the product.
The lot number column 126d stores the lot number of the part.
The machining process number column 126e stores machining process numbers for identifying each process using, for example, a lathe, a drilling machine, a three-axis milling machine, a five-axis milling machine, and a milling machine.
In the machining process plan number column 126f, a machining process plan number assigned (specified by the user) when the user creates and registers a series of machining sequence candidates in the process specified by the machining process number. Is stored.
In the machining operation number field 126g, a machining operation number (specified by the user) given when registering one machining operation in the machining sequence created and registered by the user specified by the machining process plan number. Is stored.
The machining condition column 126h stores a machining condition number used when machining one machining area created by the user.
The tool number column 126i stores a tool number used when machining one machining area created by the user.
The processing machine column 126j stores a processing machine name used when processing one processing area created by the user.
The machining time column 126k stores the machining time in the machining machine described in the machining machine column for one machining area created by the user specified in the machining operation number column 126g.
The machining area CAD model column 126l stores one machining area CAD model data created by the user specified in the machining operation number field 126g. Similar to the product CAD model or the material CAD model, data of either the face model, the solid model, or both formats is stored.

  Returning to FIG. 1, the machining process plan planning support unit 110 displays a machining process plan planning support screen 200a as shown in FIG. 8 on the display screen of the output unit 104 as a user interface, and the user plans a machining process design. To help.

For example, when the user clicks the machining area setting section 200f of the machining process planning section 200c on the machining process planning support screen 200a, the process transitions to the display of the machining area setting screen 210a shown in FIG. To do.
The machining area setting screen 210a includes an area selection screen 210b, a machining operation number registration unit 210c, an X-axis minimum selection unit 210d, an X-axis maximum selection unit 210e, a Y-axis minimum selection unit 210f, and a Y-axis maximum selection unit. 210g, a Z-axis minimum selection unit 210h, a Z-axis maximum selection unit 210i, a coordinate selection unit 210k, a machining condition selection unit 210l, a tool selection unit 210m, and a processing machine selection unit 210n.

  The area selection screen 210b has the product CAD model of the current target product (part) and the usage on the product CAD model screen and the material CAD model screen in which the viewpoint is determined and the XYZ coordinate axes are similarly determined. The material CAD model of the material to be displayed is displayed with their coordinate axes corresponding to each other. The user selects the graphic element of the face shape model of the product CAD model or the material CAD model, or the graphic element of the solid shape model using the selection means 210k by the mouse, or designates the three-dimensional coordinate position. To do. The user uses the existing machining feature defining means provided in the three-dimensional CAM unit 111 to perform machining operations necessary for manufacturing a product CAD model from the material CAD model, and thereby, one or more primitive machining areas , And what kind of processing conditions the tool and the machine select to process are defined, and a processing operation number is given to the definition of these processing operations. The process plan registration unit 112 registers these defined data in the machining process plan data storage area 126. The process plan registration unit 112 receives a machining operation number from the user via the input unit 103.

  In the process of defining the machining area by the user, the X-axis minimum selection unit 210d sets the minimum value of the X-axis of the machining area. The processing area is defined by a rectangular area, for example, and is the minimum value of the X coordinate value in the area. For the minimum value of the X axis, a pull-down menu is displayed by clicking the check box or radio button of the X axis minimum selection unit 210d with a mouse. For example, (1) CAD model reference method, (2) coordinate value input method, Select the setting method.

(1) In the CAD model reference method, the user selects and designates either the product CAD model or the material CAD model displayed on the product CAD model screen or the material CAD model screen by the selection means 210k using the mouse. The corresponding coordinate value is set by.
On the area selection screen 210b of FIG. 9, the product CAD model that the line of sight through the point position reaches when the user points either the product CAD model or the material CAD model with the selection means 210k using the mouse cursor. Alternatively, the graphic element of the face shape or solid shape of the material CAD model is specified. On the specified graphic element, the point where the X-axis coordinate value becomes the minimum value (or the maximum value) is searched. The X-axis coordinate value of the searched point is set as the X-axis minimum coordinate value of the corresponding machining area.

(2) In the coordinate value input method, the minimum value of the X axis of the machining area is set by inputting the coordinate value with the input means. Similarly, the set X-axis coordinate value is set as the X-axis minimum coordinate value of the corresponding machining area. Similarly, the X-axis maximum selection unit 210e sets the X-axis maximum value of the machining area, and the Y-axis minimum selection unit 210f sets the machining area. The Y-axis minimum value, the Y-axis maximum selection unit 210g is the maximum value of the Y-axis of the machining region, the Z-axis minimum selection unit 210h is the minimum value of the Z-axis of the processing region, and the Z-axis maximum selection unit 210i is the processing region. Set the maximum value of the Z axis. In the machining area setting screen shown in FIG. 9, a rectangular parallelepiped machining area defined by the minimum and maximum values of the X-axis, Y-axis, and Z-axis is generated by finishing selection and input in all selection units. The The process plan registration unit 112 stores the machining area CAD model data in the machining area CAD model column 126l of the machining process plan data storage area 126.

The machining condition selection unit 210l is used by the user to select a machining condition number 120b registered in the machining condition data storage area 120 from a pull-down menu or specify it from the screen to process the set machining area. Set conditions.
The tool selection unit 210m sets a tool to be used for machining in the set machining area by the user selecting from a pull-down menu of the tool number 121b registered in the tool data storage area 121 or designating from the screen. .
The processing machine selection unit 210n is used by a user to select a processing machine number 122b registered in the apparatus data storage area 122 from a pull-down menu or specify it from the screen, thereby processing the set processing area. Set.

  The process plan registration unit 112 stores the setting data in a record in the machining process plan data storage area 126 corresponding to the machining operation number 210c designated by the user.

  Subsequently, the user shifts to a registration process from the machining process plan registration screen shown in FIG. The textured shape displayed on the machining area display unit 220j represents the machining area created by the user on the machining area setting screen 210a. A machining operation number is assigned to each machining area and is displayed on the machining operation number display section 220c.

  A tool path is generated based on the set processing conditions, tool, and processing machine information by using the existing tool path generation means provided in the three-dimensional CAM unit 111 based on the set processing conditions, tool, and processing machine information. Displayed on the display unit 220k.

  The machining time calculation unit 115 calculates the machining time based on the tool path information, the machining condition data, and the device data, displays the machining time on the machining time display unit 220g, and the machining time in the machining process plan data storage area 126. Record in column 126k.

  In addition, the removal volume is calculated based on the set machining conditions, tool, processing machine, and tool path information by using the existing removal volume calculation means provided in the three-dimensional CAM unit 111. And displayed on the removed volume display section 220h.

  The user can confirm the appropriateness of the machining operation consisting of the machining area, machining conditions, tool, and machine information created by assigning the machining operation number based on the above display information. Modifications can be made from the condition display unit 220d, the tool number display unit 220e, and the processing machine number display unit 220f, and the appropriateness can be repeatedly confirmed.

  The user individually defines machining areas, creates machining operation data, and registers the machining operation data in the machining process plan data storage area 126. The machining process plan can be created by combining these machining areas. A machining process plan is defined as a machining process constituted by a sequence of machining operations in one machining process. If one machining process is, for example, 3-axis milling, the machining process plan is created with the machining process plan number = 1 with the machining process number = 1 and the three machining operations with the machining operation numbers 1-3. The data records in the first to third rows of the machining process plan data storage area 126 in FIG. The user reads out and displays individual machining areas on the machining area combination display section 220i of the machining process plan registration screen 220a in FIG. 10, and indicates that they are designated as 1 in the machining process plan number display section 220b. Yes.

  In the data records of the fourth to sixth lines in the machining process plan data storage area 126 of FIG. 7, the user creates a machining process plan with machining process plan number = 2 by three machining operations with machining operation numbers 4 to 6. Indicates that you are registered. In this way, the user creates and registers a plurality of machining process plans in advance.

Returning to the machining process plan planning support screen 200a of FIG. 8, the user can refer to the created machining process plan reference unit 200d when considering the registration of a new machining operation and machining process plan.
The created machining process plan reference unit 200d uses the machining operation data stored in the machining process plan data storage area 126 as, for example, a machining area CAD model column 126l, a machining operation number column 126g, a tool number column 126i, and a machining condition column. 126h and data stored in the processing machine column 126j are selectively displayed. In the processing area column arranged in the first column, an area display button 200i is displayed. When the user wants to confirm the processing area CAD model, the user clicks on the area display button 200i with the mouse, thereby FIG. The display of the machining area display part 220j can be confirmed. By referring to the machining process plan reference unit 200d, the user should consider that the machining area, tool, and machine do not overlap when creating a new machining operation and machining process plan in the machining process planning unit 200c. Can do.

  The machining process planning apparatus described above includes, for example, an external storage device such as a CPU (Central Processing Unit) 901, a memory 902, and an HDD (Hard Disk Drive) as shown in FIG. 19 (schematic diagram of the computer 900). 903, a reading device 908 for reading / writing information from / to a portable storage medium 904 such as a CD (Compact Disk) or a DVD (Digital Versatile Disk), an input device 906 such as a keyboard or a mouse, and an output such as a display This can be realized by a general computer 900 including a device 907 and a communication device 905 such as a NIC (Network Interface Card) for connecting to the communication network 909.

FIG. 11 is a flowchart showing a process for selecting a machining process plan and creating a production plan.
First, machining condition data, tool data, device data, and input plan data created by an external system are input via the input unit 103 or the communication unit 105, and machining condition data stored in the storage unit 102 is stored in advance. The data is stored in the area 120, the tool data storage area 121, the device data storage area 122, and the loading plan data storage area 123. Subsequently, machining process plan data defined and input by the user is stored in the machining process plan data storage area 126 by the machining process plan planning support unit 110 and the process plan registration unit 112. (S101).

  Next, one machining process plan data is selected from a plurality of machining process plan data registered in the machining process plan data storage area 126 by the machining process plan selection unit 113 based on the following processing (S102).

  In the machining process plan selection unit 113, as shown in the following formula 1, all the lots of the input plan data 123 are allocated to the apparatus, and the machining machine with the maximum machining time processed in the planning period, which is a period until the production is completed, is maximized. The total processing time L is minimized.

The machining process plan selection unit 113 determines x ^W _{j, k} so as to satisfy the following Equation 2, Equation 3, and Equation 4 at the same time as L is minimized by Equation 1.

In the above equation, w = (δ _{j, k} , u _{j, k} ) is defined by the terms δ _{j, k} and u _{j, k} . δ _{j, k} indicates that a machining process plan is selected from a plurality of machining process plans designated by lot j and machining process number k. u _{j, k} represents a processing machine used in lot j and processing step number k. x ^W _{j, k} is 1 when the machining process plan δ _{j, k} and the machining machine u _{j, k} are used in the lot j and the machining process number k, and 0 otherwise. Π _{j, k} represents all possible sets of δ _{j, k} and u _{j, k} .

Therefore, Formula 2 represents that any one machining process plan δ _{j, k} and machining machine u _{j, k} is used in lot j and machining process number k.

λ ^W _{j, k} is defined by Equations 5 and 6 below.

In Equation 5, O _i (w) is a set of processes of the lot j and the machining process number k using the processing machine i. S_ {j, k, δ_ {j, k}} represents a sequence of machining operations specified by the machining process plan number. The machining operation specified by the machining operation number is one of the sequences of S_ {j, k, δ_ {j, k}}.
In Equation 6, p (o) is the processing time of the process o, n is the number of lots, and s _j is the number of processes of the lot j. λ ^W _{j, k} is the total sum of the processing times of the lot j and the processing step number k in the processing machine i.
Formula 3 indicates that the total processing time for each processing machine is smaller than the processing time total L of the processing machine that maximizes the processing time total.

By determining the values 0 and 1 of x ^W _{j, k} so as to minimize L, it is possible to select a machining process plan that equalizes the load on the processing machine by the above Equations 1 to 6. Become. The mixed integer programming problem expressed by Equations 1 to 6 can be obtained as an optimal solution by solving a mixed integer programming problem such as a branch and bound method.

  Returning to FIG. 11, the production planning unit 114 creates an initial production plan for the processing line (S103). Details of step S103 will be described with reference to the flowchart of FIG.

  Next, the production plan improvement unit 116 repeatedly improves the created production plan by a local search method. Details of step S104 will be described with reference to the flowchart of FIG.

  Next, the result of the selected machining process plan and the created production plan is output (S105).

FIG. 12 is a schematic diagram illustrating an example of the display screen 230. This is an example in which “production plan display” is selected in the display selection area 230a.
As illustrated, the display screen 230 includes a display selection area 230a and a production plan Gantt chart display area 230b.
When “production plan display” is selected in the display selection area 230a, information for specifying the processing date and time of the product in all processes by the Gantt chart method is displayed in the production plan Gantt chart display area 230b.

FIG. 13 is a schematic diagram illustrating an example of the display screen 230. In the example of FIG. 13, “Processing machine assignment display” is selected in the display selection area 230 a.
As illustrated, the display screen 230 includes a display selection area 230a and a processing machine allocation Gantt chart display area 230c.
When “Processing machine allocation display” is selected in the display selection area 230a, information for specifying the processing product and processing date for each processing machine in the processing process by the Gantt chart method is displayed in the processing machine allocation Gantt chart display area 230c. To do.

  FIG. 14 is a schematic diagram illustrating an example of the display screen 230. In the example of FIG. 14, “product A” is selected in the product selection area 230d, and “part A” is selected in the part selection area 230e. As shown in the figure, on the display screen, the average operation rate of the processing shop for the processing process plan used for the selected product and part is displayed on the vertical axis, and the corresponding week of the production plan is displayed on the horizontal axis.

  Returning to FIG. 11, if the user of the machining process planning apparatus satisfies the user's evaluation criteria by referring to the display screen, it is assumed that no correction is made (YES in step S106), and the process is terminated. If the evaluation criterion is not satisfied, the correction is performed (NO in step S106), and the process proceeds to step S107.

Next, the machining process plan reselection unit 117 displays a machining process plan reselection screen 240 shown in FIG. 15 to assist the user in reselecting the machining process plan.
In the example of FIG. 15, “product A” is selected in the product selection area 240a, and “part A” is selected in the part selection area 240b. As shown in the figure, the production plan is re-designed based on the selected machining process plan by selecting “machining process 2” in the machining process re-selection area 240c and pressing the production plan re-planning instruction button 240d.

  FIG. 16 is a schematic diagram illustrating an example of a display screen 240 for a production plan re-planning result. In the example of FIG. 16, “product A” is selected in the product selection area 240e, and “part A” is selected in the part selection area 240f. As shown in the figure, on the display screen, the initial machining process plan for the selected product and part and the average operation rate of the machining shop for the reselected machining process plan are displayed on the vertical axis, and the corresponding week of the production plan is plotted on the horizontal axis. indicate.

  With such a display screen 240, the user of the machining process planning device evaluates the created machining process plan and production plan. If the user's evaluation criteria are not satisfied, the rule is reset, and the machining process plan And production plan can be recreated.

FIG. 17 is a flowchart showing processing for creating a production plan in step S103 in FIG.
First, the production planning unit 114 determines the processing order of lots in the order of the input date and time (S161).
Next, the production planning unit 114 repeats the processing steps S163 to S168 by the number of all lots (S162).
Next, the production planning unit 114 repeats the processing steps S164 to S168 by the number of all processes of the lot (S163).
Next, the production planning unit 114 proceeds to step S165 if the process of the lot can be processed (YES in step S164), and proceeds to step S168 if the process of the lot cannot be processed at the date and time.
Next, the production planning unit 114 processes the lot at the date and time (S165).
Next, the production planning unit 114 advances one process (S166).
Next, the production planning unit 114 advances the time by the processing time (S167).
Next, the production planning unit 114 advances the time by the unit time (S168).

FIG. 18 is a flowchart showing the process for improving the production plan in step S104 in FIG.
First, the production plan improvement unit 116 sorts lots in descending order of lead time (S171).
Next, the production plan improvement unit 116 repeats S173 to S180 by the number of all lots (S172).
Next, the production plan improvement unit 116 repeats S174 to S179 by the number of all processes of the lot (S173).
Next, the production plan improvement unit 116 cancels the assignment of the lot with the shortest lead time among other lots competing in the relevant process of the relevant lot (S174).
Next, the production plan improvement unit 116 assigns the process of the lot (S175).
Next, the production plan improvement unit 116 makes a production plan from the process by the production plan planning unit 114 (S176).
Next, if the lead time of the lot is reduced, the production plan improvement unit 116 proceeds to step S179 (YES in step 177). If the lead time of the lot is not reduced, the process proceeds to step S173.
Next, the production plan improvement unit 116 stores the current production plan (S178).
Next, if there is a lot whose lead time is reduced, the production plan improvement unit 116 proceeds to step S171 (NO in step 179). If there is no lot whose lead time is reduced, the process is terminated.

  As described above, according to the present embodiment, it is possible to provide a user with a machining process plan and a production plan for leveling the load on the processing machine.

DESCRIPTION OF SYMBOLS 100 Machining process plan apparatus 101 Operation part 102 Memory | storage part 103 Input part 104 Output part 105 Communication part 110 Machining process plan planning support part 111 3D CAM part 112 Process plan registration part 113 Machining process plan selection part 114 Production plan planning part 115 Processing Time calculation unit 116 Production plan improvement unit 117 Machining process plan reselection unit 120 Machining condition data storage area 120a Machining condition data table 121 Tool data storage area 121a Tool condition data table 122 Equipment data storage area 122a Equipment condition data table 123 Input plan data Storage area 123a Input plan data table 124 Product CAD model storage area 124a Product shape CAD model data 125 Material CAD model storage area 125a Material shape CAD model data 126 Machining process plan data storage area 126a Machining process plan data 130 3D CAD device 140 NC machine 150 Network 200a Machining process plan planning support screen 210a Machining area setting screen 220a Machining process plan registration screen 230 Production plan result output screen 240 Machining process plan reselection screen 900 Computer 901 CPU
902 Memory 903 External storage device 904 Portable storage medium 905 Communication device 906 Input device 907 Output device 908 Reading device 909 Communication network

Claims (4)

A machining process planning device for creating a machining process plan and a production plan for a machining shop,
The product CAD model and the material CAD model are displayed in comparison, the user defines the machining area on the CAD model, selects the machining conditions, tools, and machine for machining the machining area, and the machining process plan data and machining A user interface that provides input means to assist in creating operational data;
On the user interface, a machining process plan registration unit that references and displays the user's already created machining operation data,
A machining process plan data storage unit for storing machining operation data and machining process plan data created by the user via the user interface;
A machining process plan that reads machining process plan data from the machining process plan data storage unit, minimizes the machining time total of the machining machine that maximizes the machining time total within the planning period, and equalizes the load on the machining machine A machining process plan selection unit for selecting
A production planning department that determines the processing order of lots from the input date and time, and assigns processing from lots and processes that can be processed at the corresponding date and time,
A machining process planning apparatus comprising: a production plan improvement unit that sorts lots in order of increasing lead time, and changes a lot allocation to change a production plan if a lot whose lead time is reduced exists.   In the case where the average apparatus operation rate in each of the plurality of machining process plans evaluated by the machining process plan selection unit is compared and presented to the user, and reselection of the machining process plan is received from the user, reselection is performed. The machining process planning device according to claim 1, further comprising a process plan reselecting unit that repeats the processes of the production plan drafting unit and the production plan improvement unit based on the processed machining plan.   The process of the production planning section determines the processing order of lots from the input date and time, and if the processing can be performed at the corresponding date and time in the lot selection loop and the process selection loop, the processing is performed at the corresponding date and time. The production process planning apparatus according to claim 1, wherein a production plan for a machining line is created by assigning them so as to be executed.   The process of the production plan improvement unit sorts the lots in the descending order of the lead time, and assigns the lot having the shortest lead time among the competing lots in the lot selection loop and the process selection loop. The process is assigned to the lot, the process is allocated, the production plan is drafted from the process, and if the lead time of the lot is reduced, it is created as an improved production plan. Item 2. The process planning apparatus according to Item 1.

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