JP5969882B2 - Process data consistent generation device, process data consistent generation program, and process data consistent generation method - Google Patents

Description

  The present invention relates to a machining data consistent generation device for generating machining data of shape machining in machining by a machining center or the like. In particular, the present invention relates to the automation of machining data generation work in machining large structural parts such as dies and machine tools.

  Traditionally, machining data (also referred to as “NC (Numerical Control) data”. In the following, it is unified with “machining data”). It was decided. Furthermore, while performing interactive processing using a commercially available CAM system, a tool movement path (machining path) necessary for machining is calculated to generate machining data.

  In this work, first, geometric data of a product (processed product) created by CAD is sent to the CAM system. In the CAM system, an operator generates machining data by interactive processing while looking at product geometry data. In this process, a person designates each machining part while looking at the geometric shape data on the screen, and decides the machining process of the machining part by thinking and error. The machining process determined here includes the number of processes, the form of a tool used in each process, and a tooling form that is a combination of a tool and a holder (such as a chuck for holding a tool). Then, processing data for each processing site is interactively generated sequentially based on the determined processing process.

  In recent years, in order to support the determination of the machining process, which is human thought work, the machining process according to the shape characteristics of the machining site and the tool used in each process are registered in advance in the CAM system, and the machining data A method of allocating a machining process and a tool to be used according to the shape characteristics of a machining part at the time of generation (hereinafter referred to as “allocation method”) has been researched. In this case, it is necessary to extract the shape feature of the processed part from the geometric shape data of the product. In addition to the case where the operator specifies interactively on the CAM system, the shape is not available in some CAM systems. An automatic feature extraction function is also being added. Patent Documents 1 to 4 and Non-Patent Documents 1 and 2 generally correspond to this allocation method.

Japanese Patent Laid-Open No. 10-230436 JP 2009-274160 A JP 2010-27018 A JP 2008-149382 A

http://www.machinesol.jp/solution/proglesys1.html (searched on September 28, 2012) Journal of Japan Society for Precision Engineering Vol.73 No.4-5,2007 “Study on process design focusing on the dependence of machining shape characteristics (1st-3rd reports)”

  However, when a person performs a manual operation based on a drawing, the machining process design requires an operation involving human thought and error, and is a time-consuming operation requiring skill. Moreover, in the method of extracting the shape feature of the processing part in the prior art allocation methods such as Patent Literatures 1 to 4 and Non-Patent Literatures 1 and 2, registration of the machining process according to the shape feature to the CAM system is performed in advance. It was necessary. However, the registration process of the machining process in the prior art assignment method has a practical problem that the machining process is not uniformly determined with respect to the shape feature of the machining part.

  A practical problem in the prior art assignment method will be described with an example. Assuming machining of “plane”, the necessary condition for a tool capable of machining “plane” is that the tip is flat, and there are countless such tools, so the most appropriate tool can be identified. Can not. In the case of “hole” processing or the like, since it is a total shape processing in which the tool shape is transferred as it is, it is relatively easy to specify the tool to be used from the target “hole” shape. On the other hand, for general shape processing such as “planar” in which the shape of the tool is not transferred as it is, the processing steps to be registered cannot be specified.

  Other issues are also described. As for tooling, since humans predict and determine interference, interference and processing residue frequently occur during processing path calculation, and there is a problem that trial and error and backtracking occur. In addition, because the cutting conditions were previously registered for the tool, there was a problem that the cutting conditions were not determined in consideration of the overall tooling including the protruding length of the tool and the form of the holder. . In addition, since a series of machining data generation using the CAM system is performed by interactive processing, there is a problem that a person must be resident in the CAM system, which requires constant manpower and consumes many man-hours. It was. Therefore, the machining process determination function, the tool determination function used in each process, the tooling determination function, and the cutting condition determination function are intermittent operations through the operator's dialogue processing, and even if viewed from the data flow Since it is discontinuous, there has been a demand for an integrated machining data generation apparatus that organically couples functions and automatically generates machining data as a whole using CAD data as input data.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to automatically process machining data using CAD data as input data for general shape machining such as flat surfaces. It is to provide a machining data consistent generation device or the like that is generated automatically.

According to a first aspect of the present invention for achieving the above object, there is provided an input means for inputting shape data before processing of a processed product, shape data after processing of the processed product, and data of a processing machine to be used, and the processing Shape feature extracting means for extracting a shape feature of a part to be processed from post-shape data, processing step determining means for determining a partial processing step that is a processing step for each shape feature, the partial processing step, and the shape before processing Based on the data, based on the partial machining data, a partial machining data generation unit that calculates a movement path of the tool by the tool shape for each of the shape characteristics, and generates partial machining data that is machining data for each of the shape characteristics; A tooling decision that determines a tooling that is a combination of the tool and a holder that supports the tool for each of the shape characteristics on condition that no interference occurs. Means, cutting condition determining means for determining a cutting condition for each shape feature based on the tooling, and applying the cutting condition to the partial machining data, retreating from the shape feature to be processed in advance, and immediately after Integrated machining data generation that generates integrated machining data, which is machining data for continuously machining all the shape features, by sequentially determining the movement path of the tool until reaching the shape features to be machined A process mode table for storing a process mode which is a process classification parameter considering a classification including pre-processing or post-processing, and a rule for determining a processing process based on processing means of the shape feature A cutting mode table that stores cutting modes including roughing, intermediate finishing, or finishing, and an applicable tool group that is a group of usable tools.憶applying tool group table, and, and a storage means for previously storing the tool operation mode table for storing the tool operation mode illustrating the operation and type of movement of the tool of the machining, the shape feature extraction means is extracted Further, the machining specifications are generated for each of the shape features, and the machining process determining means is configured to use the process mode table, the cutting mode table, and the applied tool based on the data of the processing machine and the generated machining specifications. An apparatus for consistently generating machining data , wherein the partial machining process is determined by sequentially referring to a group table and the tool operation mode table .

  For example, the shape feature extraction means in the first invention may extract the shape features excluding the hole shape. Further, the shape feature extraction means in the first invention generates, for example, the shape data of the processing removal unit as a difference between the two by subtracting the shape data after processing from the shape data before processing, The shape feature of the part to be processed may be extracted as a three-dimensional shape feature from the shape data of the removal unit.

In addition, the process mode table, and, in the cutting mode table, wherein the shape feature rules for the machining process is determined based on the required quality class is a type indicating finished state of included, the shape feature extraction The means may add the finishing information to the extracted shape feature, and generate the processing specifications to which the finishing information is added.

  In addition, the tooling determining means estimates the rigidity of one or a plurality of the tooling that does not cause interference, and selects the tooling estimated to be the highest rigidity from a tooling table registered in advance, thereby performing the tooling. The cutting condition determining means determines the highly efficient cutting condition corresponding to the rigidity of the tooling determined by the tooling determining means based on the rigidity of the tooling estimated by the tooling determining means. You may make it do. Further, the shape data before processing may include information on a fixing jig installed for fixing the processed product.

According to a second aspect of the present invention, a computer is processed from input data for inputting processed shape data of a processed product, target processed shape data of the processed product, and data of a processing machine to be used, and the processed shape data. Based on the shape feature extracting means for extracting the shape feature of the part to be processed, the processing step determining means for determining the partial processing step that is a processing step for each shape feature, the shape feature based on the partial processing step and the shape data before processing Each of the tool movement paths is calculated based on the tool shape, and partial machining data generating means for generating partial machining data that is machining data for each of the shape features, on the condition that no interference occurs based on the partial machining data Tooling determining means for determining tooling that is a combination of the tool and a holder that supports the tool for each shape feature, and the tooling Cutting condition determining means for determining a cutting condition for each of the shape features based on the above, the shape feature to be processed immediately after retreating from the shape feature to be processed in advance, giving the cutting conditions to the partial processing data by sequentially determining the movement path of the tool to reach the integrated machining data generation means for generating an integrated processing data which is processed data for processing in succession all of the shape characteristics, the shape feature A process mode table that stores process modes, which are process classification parameters that take into account classifications including pre-processing or post-processing, that define rules for determining processing processes based on processing specifications, roughing, intermediate finishing, or Cutting mode table that stores cutting modes including finishing, and applicable tool group table that stores applicable tool groups that are groups of usable tools. Bull, and storage means for storing in advance the tool operation mode table for storing the tool operation mode indicating the type of movement of the operation and the tool of the machining, to function as the shape feature extraction means, each extracted the shape feature The processing specifications are generated on the basis of the data of the processing machine and the generated processing specifications, the process mode table, the cutting mode table, the applied tool group table, the tool A machining data consistent generation program characterized by sequentially referencing an operation mode table to determine the partial machining process .

A third aspect of the invention is a process mode for storing a process mode, which is a process classification parameter considering a classification including pre-processing or post-processing, in which a rule for determining a processing process is determined based on processing characteristics of a shape feature Table, cutting mode table for storing cutting modes including roughing, semi-finishing or finishing, an applied tool group table for storing an applied tool group which is a group of usable tools, and machining operation and tool movement A computer having storage means for storing a tool operation mode table for storing a tool operation mode indicating a type in advance, shape data before processing of the processed product, shape data after processing of the processed product, and a processing machine to be used An input step for inputting data, and a shape feature extraction step for extracting shape features of a portion to be machined from the post-machining shape data. And a machining process determination step for determining a partial machining process that is a machining process for each shape feature, and a tool movement path according to the tool shape for each shape feature based on the partial machining process and the shape data before machining. And a partial machining data generation step for generating partial machining data, which is machining data for each shape feature, and the tool for each shape feature on the condition that no interference occurs based on the partial machining data. And a tooling determining step for determining tooling that is a combination of holders that support the tool, a cutting condition determining step for determining a cutting condition for each shape feature based on the tooling, and the cutting condition in the partial machining data And retreats from the shape feature to be processed in advance, and reaches the shape feature to be processed immediately after Wherein by sequentially determining the movement path of the tool, executes the integration processing data generating step of generating an integrated processing data which is processed data for processing in succession all of the shape characteristics, the in, said shape Feature extraction means generates the machining specifications for each of the extracted shape features, and the machining process determination means, based on the data of the processing machine and the generated machining specifications, the process mode table, cutting mode table, the application tool group table, by sequentially referring to the tool operation mode table, a machining data consistency generation wherein the determining child the partial processing step.

  According to the present invention, for a general shape processing such as a flat surface, it is possible to provide an integrated processing data generation device that automatically generates processing data through CAD data as input data.

The figure which shows the hardware structural example of the process data consistent production | generation apparatus 1 The figure which shows the 1st example of the software structure of the process data consistent production | generation apparatus 1 The figure which shows the 2nd example of the software configuration of the process data consistent generation apparatus 1 The figure which shows the structural example of the integrated database 25 The figure which shows an example of the basic feature group 31 The figure which shows an example of the process specification 32 The figure which shows an example of the process mode table 33 The figure which shows an example of the cutting mode table 34 The figure which shows an example of the application tool group table 35 The figure which shows an example of the tool operation mode table 36 The flowchart which shows the detail of a process of the process process determination means 22 The figure which shows an example of the partial process data 37 The flowchart which shows the detail of a process of the tooling determination means 23 Diagram explaining the optimal tooling decision method The flowchart which shows the detail of a process of the cutting condition determination means 24 The flowchart which shows the detail of a process of the process data production | generation means 21

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each means included in the machining data consistent generation apparatus 1 of the present invention is realized by installing dedicated software in a computer.

  FIG. 1 is a diagram illustrating a hardware configuration example of the machining data consistent generation apparatus 1. The hardware configuration shown in FIG. 1 is an example, and various configurations can be adopted depending on applications and purposes.

  The machining data consistent generation apparatus 1 includes a control unit 11, a storage unit 12, a media input / output unit 13, a communication control unit 14, an input unit 15, a display unit 16, a peripheral device I / F unit 17 and the like via a bus 18. Connected.

  The control unit 11 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

  The CPU calls a program stored in the storage unit 12, ROM, recording medium or the like to a work memory area on the RAM, executes it, drives and controls each device connected via the bus 18, and generates a consistent machining data generation device. 1 to realize the later-described processing. The ROM is a non-volatile memory, and permanently stores a boot program, a program such as BIOS, data, and the like of the machining data consistent generation device 1. The RAM is a volatile memory, and temporarily stores programs, data, and the like loaded from the storage unit 12, ROM, recording medium, and the like, and includes a work area used by the control unit 11 for performing various processes.

  The storage unit 12 is an HDD (hard disk drive) or the like, and stores a program executed by the control unit 11, data necessary for program execution, an OS (operating system), and the like. As for the program, a control program corresponding to an OS (operating system) and an application program for causing the machining data consistent generation apparatus 1 to execute processing described later are stored. Each of these program codes is read by the control unit 11 as necessary, transferred to the RAM, read by the CPU, and executed as various means.

  The media input / output unit 13 (drive device) inputs / outputs data, for example, media such as a CD drive (-ROM, -R, -RW, etc.), DVD drive (-ROM, -R, -RW, etc.) Has input / output devices. The communication control unit 14 includes a communication control device, a communication port, and the like, and is a communication interface that mediates communication between the machining data consistent generation device 1 and the network. Control communication. The network may be wired or wireless.

  The input unit 15 inputs data and includes, for example, a keyboard, a pointing device such as a mouse, and an input device such as a numeric keypad. An operation instruction, an operation instruction, data input, and the like can be performed on the machining data consistent generation apparatus 1 via the input unit 15. The display unit 16 includes a display device such as a liquid crystal panel, and a logic circuit or the like (video adapter or the like) for realizing the video function of the processed data consistent generation device 1 in cooperation with the display device. The input unit 15 and the display unit 16 may be integrated like a touch panel display.

  The peripheral device I / F (interface) unit 17 is a port for connecting a peripheral device to the machining data consistent generation device 1, and the machining data consistent generation device 1 is connected to the peripheral device via the peripheral device I / F unit 17. Send and receive data. The peripheral device I / F unit 17 is configured by USB, IEEE 1394, RS-232C, or the like, and usually includes a plurality of peripheral devices I / F. The connection form with the peripheral device may be wired or wireless. The bus 18 is a path that mediates transmission / reception of control signals, data signals, and the like between the devices.

  2A and 2B are diagrams illustrating a first example and a second example of the software configuration of the machining data consistent generation device 1. FIG. As shown in FIG. 2A, for example, the machining data consistent generation apparatus 1 includes a machining data generation unit 21, a machining step determination unit 22, a tooling determination unit 23, a cutting condition determination unit 24, an integrated database 25, and the like. In the example shown in FIG. 2A, a commercially available general purpose CAM system is used. When a commercially available general-purpose CAM system is not utilized, as shown in FIG. 2B, the machining data consistent generation device 1 includes an input unit 211, a shape feature extraction unit 213, a machining specification generation unit 214, a machining step determination unit 22, and a partial machining. Data generation means 215, tooling determination means 23, cutting condition determination means 24, integrated machining data generation means 216, and the like are provided. Below, based on FIG. 2A, the function of the process data consistent production | generation apparatus 1 is demonstrated.

  The integrated database 25 includes a construction method database 26, an equipment database 27, and the like. The integrated database 25 includes one or a plurality of tables that define rules for determining a machining process based on machining characteristics of shape features. A configuration example of the integrated database 25 is shown in FIG. 3 (details will be described later). Further, the machining data consistent generation apparatus 1 may include a product shape design unit 28, a fixing jig setting unit 29, and the like corresponding to a commercially available general-purpose CAD system, as necessary.

  By installing dedicated software on a computer that implements the machining data consistent generation apparatus 1, the control unit 11 performs machining data generation means 21, machining step determination means 22, tooling determination means 23, cutting condition determination means 24, The product shape design unit 28 and the fixing jig setting unit 29 function, and the storage unit 12 and the external storage device function as the integrated database 25.

  For example, consider a case where the machining data consistent generation apparatus 1 is realized by a plurality of computers. The product shape designed by the product shape design means 28 of the first computer is processed data generation means of the second computer in order to generate processing data for general shape processing such as a plane as product shape data. 21 is input via the input means 211 (for example, the media input / output unit 13, the communication control unit 14, the input unit 15, the peripheral device I / F unit 17, etc.) of the second computer.

  In addition, if necessary, the product shape is converted into a predetermined input / output format such as IGES (Initial Graphics Exchange Specification) or STEP (Standard for The Exchange of Product model data), and then converted into a data format. Sometimes.

  Further, for example, consider a case where the machining data consistent generation apparatus 1 is realized by a single computer. The product shape designed by the product shape design unit 28 is transferred to the machining data generation unit 21 as product shape data, for example, held in the RAM or the storage unit 12.

  After the product shape data is input or delivered, the processing data generation unit 21 includes an input unit 211 (for example, a media input / output unit 13, a communication control unit 14, an input unit 15, a peripheral device I / F). Part 17 etc.), the shape specification and material of the material, and the name of the processing machine used for processing are input.

  Here, as the shape specification of the material, for example, in the case of a block material, the size specification is input, and in the case of a casting material or the like, the thickness amount added from the product shape is input. As the material of the material, for example, a material name such as cast iron or a predetermined material symbol is input. Further, as the processing machine name, for example, one of the processing machine names set in advance in the processing machine table of the integrated database 25 is input. The input means 211 for inputting the shape specifications and materials of these materials and the name of the processing machine is, for example, entered by a user using the input unit 15 such as a mouse or a keyboard, or collectively written in a file, There is a case where the input is performed via the input / output unit 13, the communication control unit 14, the input unit 15, the peripheral device I / F unit 17, or the like. Moreover, it may be stored in the storage unit 12 in advance.

  First, the processing data generation means 21 generates material shape data based on the input material shape specifications. At this time, when the shape specification of the material is designated as the thickness from the product shape, the product shape data is also referred to. Further, the processing data generation unit 21 may include the material shape generation unit 212, and the material shape generation unit 212 may generate the material shape data. Further, after generating the material shape data, the fixing jig setting means 29 may set a fixing jig for fixing the material to the table of the processing machine. The fixing jig setting means 29 sets the fixing jig based on the shape of the fixing jig registered in advance and the installation position input by the user using the input unit 15.

  Next, the processing data generation means 21 extracts individual shape features (hereinafter also referred to as “features”) of the parts to be processed from the product shape (processing by the shape feature extraction means 213) and extracts them. Process specifications for each feature are generated. The shape feature extraction unit 213 included in the machining data generation unit 21 searches for a basic feature (see FIG. 4) defined in advance from the product shape, and the feature type, shape specifications, reference position, reference axis. The feature is extracted by recognizing the direction and the like, and further recognizing the required surface roughness and required accuracy (shape accuracy and dimensional accuracy) of each surface constituting the feature.

  Here, the shape feature extraction unit 213 generates the shape data of the processing removal unit as a difference between the two by subtracting the shape data of the product from the shape data of the material generated by the material shape generation unit 212, A three-dimensional feature may be extracted from the shape data of the removal unit. In this case, the extracted three-dimensional feature is positioned as a shape feature of the processing removal unit. Note that the three-dimensional feature extracted in this way can be handled in the subsequent processing in the same manner as the feature extracted from the product shape.

  Next, the processing data generation unit 21 generates a processing specification 32 (see FIG. 5) for each basic feature (see FIG. 4) from the extracted feature information (processing by the processing specification generation unit 214) and is generated. The processed data 32 is transferred to the processing process determining means 22. Here, the processing by the shape feature extraction unit 213 and the processing specification generation unit 214 is performed for each individual feature.

  Next, the processing step determination means 22 is based on the processing specifications of individual features and the material of the material acquired from the processing data generation means 21 and the process mode table 33 (see FIG. 6) of the construction method database 26 (see FIG. 3). Reference), the cutting mode table 34 (see FIG. 7), the applied tool group table 35 (see FIG. 8), and the tool operation mode table 36 (see FIG. 9) were sequentially referred to as the machining specifications for each feature. A partial machining process for each feature that satisfies the required surface roughness and required accuracy of the feature is determined by a processing procedure (details will be described later) shown in FIG. An example of the partial machining process data 37 determined by the machining process determining means 22 is shown in FIG. 11 (details will be described later). The determined partial machining step data 37 for each feature is transferred to the machining data generation means 21. Here, the processing by the processing step determination means 22 is performed for each individual feature.

  Next, the machining data generation means 21 calculates the movement path of the tool for machining the feature based on the partial machining process data 37 for each feature acquired from the machining process determination means 22, and individually based on this. The partial processing data of the feature processing is generated (processing by the partial processing data generation means 215). Here, the partial processing data means partial processing data corresponding to each feature for processing the feature. The generated partial machining data for each feature, together with the material shape data and the partial machining process data 37 for each feature determined by the machining process determining means 22, are combined forms of tools and holders when machining individual features. Is passed to the tooling determining means 23 for determining the tooling. Here, if necessary, the name of the processing machine and the material used for processing are also passed.

  Next, the tooling determination means 23 uses the material shape data based on the partial machining process data 37 and the partial machining data for each feature, and uses the tool table and tooling table of the equipment database 27 (see FIG. 3), as well as necessary. Accordingly, by performing machining simulation with reference to the processing machine table and the fixture table, the optimum tooling for individual feature processing that is predicted to have the highest rigidity without interference in the processing of individual features is shown in FIG. It is determined by the processing procedure shown (details will be described later). FIG. 13 shows a conceptual diagram of the optimum tooling determination method (details will be described later).

  In determining the optimum tooling, in addition to a method of quoting candidates from a tooling table registered in advance as a fixed tooling in a state where a tool and a holder are combined, a tool table in the equipment database 27 (see FIG. 3) and It is also effective to use both the holder table and quote the tool and the holder individually to determine the combination of the tool and the holder. The latter has the advantage that the tool blade length and protrusion length and the holder protrusion length when a plurality of holders are combined can also be determined.

  The optimum tooling for each feature determined by the tooling determination unit 23 is transferred to the machining data generation unit 21. Here, the processing by the tooling determination means 23 is performed for each individual feature.

  Next, the machining data generation means 21 delivers the optimum tooling for each feature acquired from the tooling determination means 23 to the cutting condition determination means 24, and the optimum cutting conditions for individual feature machining considering the tooling rigidity from the cutting condition determination means 24. To get. The processing procedure for determining the optimum cutting condition in the cutting condition determining means 24 is shown in FIG. 14 (details will be described later).

  Thereafter, the machining data generation means 21 retreats from the approach path and retract path for machining all the features, that is, the machining target feature to be machined in advance, and reaches the machining target feature to be machined immediately thereafter. The movement path of each feature is determined sequentially, the optimum cutting conditions for each feature machining are given to the partial machining data of each feature machining, and these are integrated based on the approach path and the retract path for machining all the features. Then, integrated processing data for processing all the features is generated (processing by the integrated processing data generation means 216), and the processing steps, optimum tooling, and integrated processing data are output means (for example, the media input / output unit 13, communication) It outputs via the control part 14, the display part 16, and the peripheral device I / F part 17). Here, the processing data generation means 21 generates processing paths for connecting the features according to a rule such as processing the upper features first in the setup state (the state set in the processing machine). , Generate integrated machining data. Further, the machining data generation means 21 may store the machining process, optimum tooling, and integrated machining data in the storage unit 12.

  As described above, the machining data consistent generation apparatus 1 according to the embodiment of the present invention includes the machining process determination unit 22, the tooling determination unit 23, the cutting condition determination unit 24, and the integrated database 25 with the machining data generation unit 21 as a core. By organically coupling, machining data in which machining processes, tooling forms, and cutting conditions are comprehensively examined can be automatically and consistently generated without human intervention. The machining data generation means 21 which is the core of the machining data consistent generation apparatus 1 sequentially performs processing as shown in FIG. 15 (details will be described later).

  FIG. 3 is a diagram illustrating a configuration example of the integrated database 25. As shown in FIG. 3, the integrated database 25 includes a construction method database 26 that stores information on construction methods, and a facility database 27 that stores information about facilities.

  The construction method database 26 includes a process mode table, an applied tool group table, a cutting mode table, a tool operation mode table, and the like. The process mode table stores information on process modes for various conditions. The applied tool group table stores information on available tool groups. For example, the tool group “face mill” includes several types of tools such as a face mill. The cutting mode table stores information related to cutting modes for various conditions. The tool operation mode table stores information on tool operation modes such as a machining operation mode and a tool movement mode.

  The equipment database 27 includes a processing machine table, a tool table, a fixture table, a holder table, a cutting condition table, a tooling table, and the like. The processing machine table stores information on available processing machines. The tool table stores information about available tools. The fixing jig table stores information related to usable fixing jigs. The cutting condition table stores information on cutting conditions such as the tool rotation speed and the tool feed speed. The holder table stores information on available holders. The tooling table stores information related to fixed tooling in which the tool stored in the tool table and the holder stored in the holder table are combined.

  FIG. 4 is a diagram illustrating an example of the basic feature group 31. Rough types of features (shape features) included in the basic feature group 31 include, for example, a plane, a cylindrical surface, a shoulder surface, a side notch, a corner notch, a groove, a seat, a pocket, a through pocket, and the like.

  Examples of the plane include a rectangular plane, a circular plane, a general plane, a composite plane, and a chamfer. The cylindrical surface includes, for example, a cylindrical side surface. Examples of the shoulder surface include a shoulder and a continuous shoulder.

  Examples of the side notch include a rectangular side notch, a circular side notch, and a U-shaped side notch. Examples of the corner notch include a rectangular corner notch, a circular corner notch, and a U-shaped side notch.

  Examples of the groove include a rectangular groove, a rectangular groove with R, an oval groove, a circular groove, a U groove, a V groove, a right angle V groove, a T groove, and an ant groove. Examples of the seat include a rectangular seat, an oval seat, a circular seat, and a U-shaped seat. Examples of the pocket include a rectangular pocket, an oval pocket, and a free pocket. Examples of the penetration pocket include a rectangular penetration pocket, an oval penetration pocket, and a free penetration pocket.

  FIG. 5 is a diagram illustrating an example of the machining specifications 32. The machining specification 32 includes setup state information and machining area information. The setup state information is information related to the setting before processing. The processing area information is information regarding the area to be processed.

  The setup state information includes, for example, a setup model ID, STL (Standard Triangulated Language: file format for storing data representing a three-dimensional shape) file name, material code, reference point (X, Y, Z), size (X , Y, Z), reference axis vector (I, J, K), the number of machining areas, and the like.

  The processing area information includes, for example, a processing area number, an identification code, an STL file name, a feature type symbol, a reference point (X, Y, Z), an area size (X, Y, Z), an L vector (I, J, K), surface state, material thickness (cutting allowance), cutting mode symbol, feature information, and the like.

  In the example illustrated in FIG. 5, the feature type symbol is “corner_notch_straight”. The feature information is information indicating the shape of the feature for this feature type symbol.

  FIG. 6 is a diagram illustrating an example of the process mode table 33. The process mode table 33 stores a process mode for each machine type, feature classification, required quality class, machining allowance classification, and machining progress classification.

  The required quality class is one piece of finish information indicating the finish state of the shape feature. The process mode is specified by the category of whether to process with only a single tool or with multiple tools (multi-tool), and the categories of all processing, pre-processing, post-processing, front / back processing, no processing Mode.

  FIG. 7 is a diagram illustrating an example of the cutting mode table 34. The cutting mode table 34 stores a process number, a cutting mode, a processing quality class, a remaining margin, and the like for each process mode and required quality class.

  FIG. 8 is a diagram illustrating an example of the applied tool group table 35. The applied tool group table 35 stores an applied tool group (first priority, second priority, third priority,...) For each feature type and machining quality class. The two-dot chain line means that data that continues in the right direction or the downward direction is omitted.

  The feature type is information indicating the type of the feature (shape feature) as illustrated in FIG. Here, the feature type in FIG. 4 indicates the type of feature in a predetermined reference coordinate system, and the feature type in FIGS. 8 and 9 indicates the type of feature in the processing coordinate system. The processing quality class is, for example, rough processing, intermediate processing, advanced processing, super-high processing, grinding processing, etc., and is an index that comprehensively represents the accuracy and surface roughness that should be achieved (or can be achieved) by processing. . The applied tool group table 35 stores tool groups to be used with priority for each feature type. The data stored in the applied tool group table 35 is used as reference information for automatically determining a tool group to be used (one of information related to the machining process) for the feature to be machined.

  FIG. 9 is a diagram illustrating an example of the tool operation mode table 36. The tool operation mode table 36 stores a tool operation mode (a machining operation mode and a tool movement mode) for each feature type, cutting mode, and shape material classification. Note that the two-dot chain line means that data that continues downward is omitted.

  The tool operation mode table 36 stores a tool operation mode for each feature type. The data stored in the tool operation mode table 36 is used as reference information for automatically determining a tool operation mode (one of information related to the machining process) to be applied to the feature to be machined.

  FIG. 10 is a flowchart showing details of the processing of the processing step determination means 22. As shown in FIG. 10, first, the control unit 11 (machining process determining means 22) inputs the machining characteristics of the shape feature and the material of the material (S101). Next, the control unit 11 (machining process determining means 22) recognizes the required machining quality from the machining characteristics of the shape feature (S102). Next, the control unit 11 (machining process determination means 22) refers to the process mode table 33 and the cutting mode table 34 of the construction method database 26 based on the material material, and determines a machining process that satisfies the required machining quality. (S103). Then, the control unit 11 (machining process determining means 22) outputs the determined machining process as the partial machining process data 37 (S104).

  FIG. 11 is a diagram illustrating an example of the partial machining process data 37. The partial machining process data 37 includes header information and process information. The header information is basic information regarding the target partial machining process. The process information is detailed information regarding the target partial machining process.

  The header information includes, for example, a setup model ID, a reference point (X, Y, Z), a reference axis vector (I, J, K), the number of machining parts, and the like. The process information includes, for example, a machining part identification code, a machining part type code, the number of processes, tool information for each process, machining information, machining residue, path information, cutting conditions, and the like.

  FIG. 12 is a flowchart showing details of the processing of the tooling determining means 23. Note that the processing shown in FIG. 12 is based on a machining simulation execution unit (realized by dedicated software). The processing simulation execution unit will be described with reference to FIG.

  As shown in FIG. 12, first, the control unit 11 (tooling determining means 23) inputs the shape of the material, the shape of the fixing jig, the partial machining process data 37, the partial machining data, and the machine name (S201).

  Next, the control unit 11 (tooling determining means 23) sets the shape of the material in the execution part for machining simulation (S202), sets the shape of the fixing jig in the execution part for machining simulation (S203), and the processing machine The processing machine data is acquired from the processing machine table of the equipment database 27 based on the name and set in the processing simulation execution unit (S204), and the tooling candidate data is acquired from the tooling table of the equipment database 27 based on the processing machine name. And it sets to the execution part of processing simulation (S205).

  Next, for the first partial machining process, the control unit 11 (tooling determining means 23) reads the tool name and partial machining data name of each process from the partial machining process data 37 and sets them in the machining simulation execution unit. (S206). Then, the control unit 11 (tooling determining means 23) executes a machining simulation of the first partial machining process, generates an appropriate tooling area (non-interference area) (S207), and generates tooling candidate data based on the appropriate tooling area. Referring to FIG. 5, the optimum tooling for each process is determined (S208).

  Next, the control unit 11 (the tooling determining unit 23) checks whether or not the optimum tooling determining process has been repeated for the number of steps (S209). When the number of processes has not been repeated (No in S209), the control unit 11 (the tooling determining unit 23) repeats the process from S206 for the next partial machining process. When the process is repeated for the number of steps (Yes in S209), the control unit 11 (the tooling determining unit 23) outputs the data of the optimum tooling (S210).

  FIG. 13 is a diagram for explaining a method for determining optimum tooling. As shown in FIG. 13, the control unit 11 (processing simulation execution unit) sets an initial virtual tooling unit around the cutting tool, moves the cutting tool based on the partial processing data, and moves the workpiece with the cutting tool. While cutting, the virtual tooling part is cut with the workpiece and the fixture (reverse cutting). In FIG. 13, a pattern is given to the area of the workpiece after cutting and the virtual tooling part. And the control part 11 (execution part of a process simulation) produces | generates the virtual tooling part after moving a blade to the last based on partial process data as an appropriate tooling area | region (non-interference area | region). And the control part 11 (execution part of a process simulation) collates a candidate tooling shape with the appropriate tooling area of a virtual tooling part, and when a tooling shape of a candidate fits in an appropriate tooling area, there is no interference and it uses Judging that it is possible, the rigidity of the available tooling is compared, and the tool having the highest rigidity is presented as the optimum tooling.

  FIG. 14 is a flowchart showing details of the processing of the cutting condition determining means 24. As shown in FIG. 14, first, the control unit 11 (cutting condition determining means 24) inputs the material material, the tool used, and the optimum tooling (S301). Next, the control unit 11 (cutting condition determining means 24) acquires basic cutting conditions from the cutting condition table of the equipment database 27 based on the material and the tool used (S302). Next, the control unit 11 (cutting condition determination means 24) estimates the optimum tooling rigidity (S303). The estimation of rigidity is to calculate the amount of deflection of the tool used based on the material quality, tool used, optimum tooling, and basic cutting conditions. A known technique can be applied to the rigidity estimation process. Note that the cutting condition determination unit 24 may acquire an estimated value of the tooling stiffness from the tooling determination unit 23. Then, the control unit 11 (cutting condition determining means 24) determines the optimum cutting condition from the basic cutting conditions according to the rigidity of the optimum tooling (S304), and outputs the optimum cutting condition (S305). Here, as described above, in the case of the method for determining the optimum tooling from the tooling table registered as the fixed tooling, the cutting condition determination means 24 is provided in the equipment database 27 in which the cutting conditions corresponding to the rigidity of the tooling are registered. The tooling cutting conditions may be acquired as the optimum tooling cutting conditions.

  FIG. 15 is a flowchart showing details of processing of the machining data generation means 21. FIG. 15 shows the overall processing flow of the machining data consistent generation apparatus 1 with the machining data generation means 21 as a main body. In the following, for convenience of explanation, each means is described as a subject of processing, but actually, the control unit 11 functions as each means and executes processing of each step. FIG. 15 shows an example of the processing procedure, and the present invention is not limited to this example.

  As shown in FIG. 15, the processing data generation means 21 inputs the shape of the product to be processed, and separately inputs the shape specifications and materials of the material and the name of the processing machine used for processing. The input is performed via the input / output unit 13, the communication control unit 14, the input unit 15, the peripheral device I / F unit 17, and the like (S401: processing by the input unit 211).

  Next, the processing data generation unit 21 generates the shape of the material before processing based on the input material shape specifications and the product shape as necessary (S402: Material shape generation). Processing by means 212) If necessary, the fixing jig setting means 29 gives the shape of the fixing jig for fixing the material to the processing machine to the input material shape (S403), and the product A shape feature is extracted from the shape (S404: processing by the shape feature extraction unit 213), a processing specification for each shape feature is generated (S405: processing by the processing specification generation unit 214), and the generated shape feature is generated. Each machining specification and material are transmitted to the machining process determining means 22 (S406).

  Here, the shape of the fixing jig provided in S403 may be treated as included in the shape before processing together with the shape of the material in the subsequent processing.

  Further, the product shape design means 28 may generate the shape of the material before processing, and the input information to the processing data generation means 21 may include the shape of the material before processing. In this case, it is not necessary to generate the shape of the material by the machining data generation means 21.

  As described with reference to FIG. 10, the machining process determination unit 22 determines a partial machining process for each shape feature, and returns the partial machining process data 37 to the machining data generation unit 21.

  Next, the machining data generation unit 21 acquires the partial machining process data 37 for each shape feature from the machining process determination unit 22 (S407), and processes the target shape feature based on the partial machining process data 37. A tool path (tool movement path) is calculated (S408), and based on this, partial machining data of individual shape feature machining is generated (S409: processing by the partial machining data generation means 215), and the shape of the material, fixed treatment The tool shape, processing machine name, partial processing step data 37, and the generated partial processing data of the individual shape feature processing are transmitted to the tooling determination means 23 (S410).

  As described with reference to FIGS. 12 and 13, the tooling determination unit 23 determines the optimum tooling for each shape feature, and returns it to the processing data generation unit 21.

  Next, the machining data generation unit 21 acquires the optimum tooling for each shape feature from the tooling determination unit 23 (S411), and transmits the optimum tooling for each shape feature acquired from the tooling determination unit 23 to the cutting condition determination unit 24. (S412).

  As described with reference to FIG. 14, the cutting condition determination unit 24 determines the optimum cutting condition for each shape feature and sends it back to the machining data generation unit 21.

  Next, the machining data generating unit 21 acquires the optimum cutting conditions for each shape feature from the cutting condition determining unit 24 (S413), and determines an approach path and a retract path for machining all the shape features (S414). , By assigning optimum cutting conditions for each shape feature to the partial machining data of each shape feature, and further integrating them based on the approach path and retract path for machining all the shape features. Integrated machining data for machining is generated (S415: processing by integrated machining data generation means 216).

  Then, the machining data generation means 21 outputs the partial machining process data 37 for each shape feature determined by the machining process determination means 22, the optimum tooling for each shape feature determined by the tooling determination means 23, and integrated machining data. (S416).

  As described above, the machining data consistent generation apparatus 1 organically combines the functions of machining process determination, tooling determination, and cutting condition determination, and CAD data is used as input data for general shape machining such as flat surfaces. Processing data can be automatically generated at once.

<Operation in the embodiment of the present invention>
・ By simply inputting CAD data, the machining data required for machining is automatically generated without human intervention, significantly reducing the man-hours for CAM operators and preventing human errors such as input and operation through interactive processing. Is done. In addition, stable quality processing data that does not depend on the level of human skill is generated.
-The machining path is calculated only with the tool edge shape, and tooling is determined using the generated machining data, so that there is no work return due to interference.
-Since the machining process decision and tooling decision are executed based on database information such as the construction method table, tool table, holder table, etc., machining based on the unified information is performed, and standardization is promoted.
-By consolidating machining know-how into a database, on-site know-how of a certain quality can be preserved and continuously maintained, leading to succession of technology.

<Effects of Embodiment of the Present Invention>
-The number of man-hours is significantly reduced and stable quality machining data is generated.
-There is no return to work, and the optimal touring decision is completed in one shot.
・ Standardization of processing and standardization of tools will be promoted, and the inventory of jigs and tools will be reduced, leading to a reduction in equipment costs.
・ Preservation and succession of on-site know-how is promoted.

  As mentioned above, although suitable embodiment of the process data consistent production | generation apparatus etc. which concern on this invention was described referring an accompanying drawing, this invention is not limited to this example. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 1 ......... Processing data consistent generation apparatus 11 ......... Control part 12 ......... Storage part 13 ......... Media input / output part 14 ......... Communication control part 15 ......... Input part 16 ......... Display part 17 ... ...... Peripheral device I / F unit 18 ......... Bus 21 ......... Processing data generation means 211 ......... Input means 212 ......... Material shape generation means 213 ......... Shape feature extraction means 214 ......... Processing specifications Generation means 215... Partial machining data generation means 216... Integrated machining data generation means 22... Machining process determination means 23... Tooling determination means 24. ......... Construction method database 27 ......... Equipment database 28 ......... Product shape design means 29 ......... Fixing jig setting means 31 ......... Basic feature group 32 ......... Machining specifications 33 ......... Process Over de table 34 ......... cutting mode table 35 ......... applied tool group table 36 ......... tool operation mode table 37 ......... partial machining process data

Claims (8)

Input means for inputting shape data before processing of the processed product, shape data after processing of the processed product, and data of a processing machine to be used;
A shape feature extracting means for extracting a shape feature of a part to be processed from the processed shape data;
A processing step determining means for determining a partial processing step that is a processing step for each of the shape features;
Based on the partial machining step and the pre-machining shape data, a partial machining data generating unit that calculates a tool movement path by a tool shape for each shape feature and generates partial machining data that is machining data for each shape feature. When,
Tooling determining means for determining tooling that is a combination of the tool and a holder that supports the tool for each shape feature, on the condition that no interference occurs based on the partial machining data;
Cutting condition determining means for determining a cutting condition for each of the shape features based on the tooling;
By assigning the cutting conditions to the partial machining data, retreating from the shape feature to be processed in advance, and sequentially determining the movement path of the tool until reaching the shape feature to be processed immediately, Integrated machining data generating means for generating integrated machining data which is machining data for continuously processing the shape feature;
A process mode table that stores process modes, which are process classification parameters that take into account classifications including pre-processing or post-processing, that define rules for determining processing processes based on the processing parameters of the shape features, rough cutting, medium Cutting mode table for storing finishing or cutting mode including finishing, applied tool group table for storing applied tool group which is a group of usable tools, and tool operation indicating the type of machining operation and tool movement Storage means for storing in advance a tool operation mode table for storing the mode;
Equipped with a,
The shape feature extraction means generates the processing specifications for each of the extracted shape features,
The machining process determining means sequentially refers to the process mode table, the cutting mode table, the applied tool group table, and the tool operation mode table based on the data of the machine and the generated machine specifications. An apparatus for consistently producing machining data, wherein the partial machining process is determined . The process mode table and the cutting mode table include a rule for determining a machining process based on a required quality class which is a type indicating a finished state of the shape feature,
2. The consistent machining data generation according to claim 1, wherein the shape feature extraction unit adds the finish information to the extracted shape feature and generates the machining specifications to which the finish information is added. apparatus. The shape feature extraction means, working data consistency generator according to claim 1 or claim 2, characterized in that extracting the shape feature except hole shape. The shape feature extracting means should generate the shape data of the processing removal unit as a difference between the two by subtracting the post-processing shape data from the pre-processing shape data, and perform processing from the shape data of the processing removal unit The machining data consistent generation device according to any one of claims 1 to 3 , wherein the shape feature of a part is extracted as a three-dimensional shape feature. The tooling determining means determines the tooling by estimating the rigidity of one or a plurality of the toolings in which interference does not occur, and selecting the tooling estimated to be the highest rigidity from a pre-registered tooling table. ,
The cutting condition determining means determines, for the tooling determined by the tooling determining means, the highly efficient cutting condition corresponding to the rigidity based on the rigidity of the tooling estimated by the tooling determining means. processing data consistency generating apparatus according to any one of claims 1 to 4, characterized. The pre-machining shape data, machining data consistency generating apparatus according to any one of claims 1 to 5, characterized in that it comprises the information of the fixture installed in order to fix the workpiece . Computer
Input means for inputting shape data before processing of the processed product, target shape data of the processed product, and data of the processing machine to be used,
A shape feature extracting means for extracting a shape feature of a part to be processed from the processed shape data;
A processing step determining means for determining a partial processing step that is a processing step for each of the shape features;
Based on the partial machining step and the pre-machining shape data, a partial machining data generating unit that calculates a tool movement path by a tool shape for each shape feature and generates partial machining data that is machining data for each shape feature. ,
Tooling determining means for determining a tooling that is a combination of the tool and a holder that supports the tool for each shape feature, on the condition that no interference occurs based on the partial machining data;
Cutting condition determining means for determining a cutting condition for each of the shape features based on the tooling;
By assigning the cutting conditions to the partial machining data, retreating from the shape feature to be processed in advance, and sequentially determining the movement path of the tool until reaching the shape feature to be processed immediately, Integrated machining data generating means for generating integrated machining data which is machining data for continuously machining the shape feature;
A process mode table that stores process modes, which are process classification parameters that take into account classifications including pre-processing or post-processing, that define rules for determining processing processes based on the processing parameters of the shape features, rough cutting, medium Cutting mode table for storing finishing or cutting mode including finishing, applied tool group table for storing applied tool group which is a group of usable tools, and tool operation indicating the type of machining operation and tool movement Storage means for storing in advance a tool operation mode table for storing the mode;
To function as,
The shape feature extraction means generates the processing specifications for each of the extracted shape features,
The machining process determining means sequentially refers to the process mode table, the cutting mode table, the applied tool group table, and the tool operation mode table based on the data of the machine and the generated machine specifications. Determine the partial machining process
A machining data consistent generation program characterized by this . A process mode table that stores process modes, which are process classification parameters that take into account classifications including pre-processing or post-processing, that define rules for determining machining processes based on the machining characteristics of shape features, rough cutting, and intermediate finishing Or a cutting mode table that stores a cutting mode including finishing, an applied tool group table that stores an applied tool group that is a group of usable tools, and a tool operation mode that indicates a type of machining operation and tool movement A computer having storage means for storing in advance a tool operation mode table for storing
An input step for inputting shape data before processing of the processed product, shape data after processing of the processed product, and data of a processing machine to be used;
A shape feature extraction step of extracting a shape feature of a part to be processed from the processed shape data;
A machining step determining step for determining a partial machining step which is a machining step for each of the shape features;
Based on the partial machining step and the pre-machining shape data, a partial machining data generation step of calculating a tool movement path by a tool shape for each shape feature and generating partial machining data as machining data for each shape feature When,
A tooling determining step for determining a tooling that is a combination of the tool and a holder that supports the tool for each shape feature, on the condition that no interference occurs based on the partial machining data;
A cutting condition determining step for determining a cutting condition for each of the shape features based on the tooling;
By assigning the cutting conditions to the partial machining data, retreating from the shape feature to be processed in advance, and sequentially determining the movement path of the tool until reaching the shape feature to be processed immediately, An integrated machining data generation step for generating integrated machining data which is machining data for continuously machining the shape feature;
Run
The shape feature extraction means generates the processing specifications for each of the extracted shape features,
The machining process determining means sequentially refers to the process mode table, the cutting mode table, the applied tool group table, and the tool operation mode table based on the data of the machine and the generated machine specifications. Determine the partial machining process
Processing data consistency generation wherein a call.

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