JP2010170323A - Method, system and program for creation of machining path, and computer readable recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method, system and program for creating a machining path, capable of reducing time to create the machining path of a workpiece, and to provide a computer readable recording medium. <P>SOLUTION: The method is provided for machining path creation, by which the machining path for machining the workpiece on a machine is created using the machine and a CAD software operating on a computer connected to the machine. Firstly, the CAD software extracts a particular machined shape that allows the machining path to be created by use of a machining path creation function of the machine from data about the shape of the workpiece, and determines the value of a parameter for specifying the shape of the particular machined shape according to the data about the shape of the workpiece, thereby creating a machining code. Next, using the machining path creation function and based on the machining path preset for the particular machined shape, the machine creates the machining path out of the machining code created. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention generally relates to a machining path creation method for creating a machining path for machining a workpiece, and in particular, a machining path creation method and a machining path that can reduce the creation time of a machining path for a workpiece. The present invention relates to a creation system, a machining path creation program, and a computer-readable recording medium.

  Conventionally, when designing a mold for product molding from product shape data, it has been proposed to simplify the mold design procedure using the operation history function of CAD software as an attempt to shorten the mold design time. (For example, refer to Patent Document 1).

  In the mold design support system disclosed in Patent Document 1, several models are prepared as product shapes, and the mold design operation procedure for each model is stored in advance as operation history in CAD software. When designing a mold for a new product, the operation history of the closest stored model is read, and the shape data of the new product is applied to this to update the data. Create

  In such a mold design support system, mold design procedures by skilled workers are stored and stored as operation histories, so that even a relatively inexperienced person can perform mold design quickly and with a certain quality. In addition, the mold design work period can be shortened.

Japanese Patent No. 3629439

  By the way, when a product designed through such design work is actually processed by a processing machine, it is necessary to set a processing path followed by the processing tool. As a method of setting this machining path, at present, it is common to create NC (numerical control) data for a die machining machine using, for example, CAM software. However, since this NC data creation work includes work for finely instructing a machining start point, a movement distance, a movement direction, and the like on the processing machine, it takes a lot of time to create a machining path for one mold. At the same time, work by so-called skilled workers who are relatively experienced was necessary.

  The present invention has been made to solve such problems, and a machining path creation method, a machining path creation system, a machining path creation program, and a computer reading that can shorten the machining path creation time of a workpiece. The main purpose is to provide a possible recording medium.

  In order to achieve the above object, a first aspect of the present invention uses a processing machine and CAD software that runs on a computer connected to the processing machine to process a workpiece on the processing machine. A machining path creation method for creating a path, wherein the CAD software extracts a specific machining shape capable of creating a machining path using the machining path creation function of the processing machine from the shape data of the workpiece. A step of creating a machining code by the CAD software determining a parameter value for identifying the shape of the specific machining shape according to the shape data of the workpiece; and the processing machine However, using the machining path generation function of the processing machine, the created machining code is created based on the machining path preset for the specific machining shape. A machining path generation method and a step of creating the machining path from the de.

  In the first aspect, the processing path creation function of the processing machine is to specify a specific processing shape, and input parameter values set for the specific processing shape, depending on the values of those parameters. This is a function of automatically creating a machining path for machining a specific machining shape. Such a machining path creation function is a function provided in many general processing machines. However, after NC data can be created by CAM software, NC data for all shapes is created by CAM software. It has become common to create and has been used less frequently.

  According to the first aspect, unlike the conventional method in which NC data is created for all machining shapes, a machining code in which parameter values are determined for a specific machining shape can be created. Therefore, the processing machine can quickly create a processing path.

  That is, according to the first aspect, since it is not necessary to output machining path data for a specific machining shape as NC data, the machining path creation time can be shortened.

  Further, according to the first aspect, when a specific processing shape and other shapes are mixed in the shape data of the workpiece, a processing path for the specific processing shape is created on the processing machine side. For other shapes, NC data can be created in parallel using, for example, CAM software as in the prior art. Therefore, since the machining path creation work for a specific machining shape can be divided and executed separately from the machining work for other shape machining paths, the machining path creation time can be further shortened.

  A second aspect of the present invention for achieving the above object is a machining path creation method according to the first aspect, wherein in the step of creating the machining code, the CAD software sets the specific machining shape. On the other hand, a machining path creation method is to set a reference point and determine the value of the parameter based on the reference point.

  In the conventional NC data creation method for creating a machining path so as to indicate the position with respect to the entire workpiece shape, if the dimension of the blank model before machining is large, the NC data for designating the machining path accordingly increases. turn into.

  In this regard, according to the second aspect, since the reference point is set for the specific machining shape, the value of the parameter becomes a value based on the reference point. Therefore, a machining code can be created with a relatively small amount of data regardless of the size of the workpiece. Thereby, since calculation load can be reduced, a more rapid machining path creation operation can be realized.

  Further, according to the second aspect, since a reference point is set for each specific machining shape and a parameter value is determined for the reference turning point, it is related to the overall shape and size of the workpiece. Therefore, the parameter value can be easily determined. In addition, the data amount of the created machining code can be reduced by setting the parameter value.

  A third aspect of the present invention for achieving the above object is a machining path creation method according to the first or second aspect, wherein in the step of creating the machining code, the CAD software This is a machining path creation method in which the parameter value of the machining tool to be used is determined according to the machining shape.

  According to the third aspect, since the parameter value of the machining tool is determined in the step of creating the machining path, the machining machine creates the machining path and uses the machining tool to be used according to the machining shape data. It is determined. Therefore, since the processing machine can start the processing operation at the same time as creating the processing path, it is possible to realize even faster processing.

  A fourth aspect of the present invention for achieving the above object is a processing path that includes a processing machine and a computer connected to the processing machine, and creates a processing path for processing a workpiece in the processing machine. A specific machining shape storage means storing a parameter for specifying a shape of a specific machining shape capable of creating a machining path using the machining path creation function of the processing machine, and the specific machining The machining path storage means storing the machining path corresponding to the shape, the specific machining shape is extracted from the shape data of the workpiece, and the value of the parameter is determined according to the shape data of the workpiece The machining path is created from the created machining code using the machining code creation means for creating the machining code and the machining path generation function of the machining machine. A machining path generation system and a machining path creation means.

  In the fourth aspect, the processing path creation function of the processing machine is to specify a specific processing shape and input parameter values set for the specific processing shape, depending on the values of those parameters. This is a function of automatically creating a machining path for machining a specific machining shape. Such a machining path creation function is a function provided in many general processing machines. However, after NC data can be created by CAM software, NC data for all shapes is created by CAM software. It has become common to create and has been used less frequently.

  According to the fourth aspect, unlike the conventional method in which NC data is created for all machining shapes, a machining code with parameter values determined for a specific machining shape can be created. Therefore, the processing machine can quickly create a processing path.

  That is, according to the fourth aspect, since it is not necessary to output machining path data for a specific machining shape as NC data, the machining path creation time can be shortened.

  Further, according to the fourth aspect, when a specific processing shape and other shapes are mixed in the shape data of the workpiece, a processing path for the specific processing shape is created on the processing machine side. For other shapes, NC data can be created in parallel using, for example, CAM software as in the prior art. Therefore, since the machining path creation work for a specific machining shape can be divided and executed separately from the machining work for other shape machining paths, the machining path creation time can be further shortened.

  A fifth aspect of the present invention for achieving the above object is to process a workpiece in the processing machine when executed by a computer connected to the processing machine and configured to run CAD software. A machining path creation program for creating a machining path of the machine, and when executed by the computer, the computer can create a machining path in the CAD software using the machining path creation function of the processing machine. The means for extracting the specific machining shape from the shape data of the workpiece, and the CAD software determine parameter values for identifying the shape of the specific machining shape according to the shape data of the workpiece. By using the processing path generation function of the processing machine, the means for generating the processing code and the processing machine Based on the preset working path for the particular machining shape, a machining path creation program to function as a unit, for creating the machining path from the machining code above created.

  In the fifth aspect, the machining path creation function of the processing machine is to specify a specific machining shape and input parameter values set for the specific machining shape, depending on the values of those parameters. This is a function of automatically creating a machining path for machining a specific machining shape. Such a machining path creation function is a function provided in many general processing machines. However, after NC data can be created by CAM software, NC data for all shapes is created by CAM software. It has become common to create and has been used less frequently.

  According to the fifth aspect, unlike the conventional method in which NC data is created for all machining shapes, a machining code with parameter values determined for a specific machining shape can be created. Therefore, the processing machine can quickly create a processing path.

  That is, according to the fifth aspect, since it is not necessary to output machining path data for a specific machining shape as NC data, the machining path creation time can be shortened.

  Further, according to the fifth aspect, when a specific processing shape and other shapes are mixed in the shape data of the workpiece, a processing path for the specific processing shape is created on the processing machine side. For other shapes, NC data can be created in parallel using, for example, CAM software as in the prior art. Therefore, since the machining path creation work for a specific machining shape can be divided and executed separately from the machining work for other shape machining paths, the machining path creation time can be further shortened.

  In order to achieve the above object, a sixth aspect of the present invention is a computer-readable recording medium recording a machining path creation program according to the fifth aspect.

  According to the present invention, it is possible to provide a machining path creation method, a machining path creation system, a machining path creation program, and a computer-readable recording medium that can shorten the machining path creation time of a workpiece.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram illustrating a machining system according to an embodiment (Example 1) of the present invention. It is a perspective view which shows the product used with the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the specific process shape of the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the process path of the specific process shape which concerns on one Example (Example 1) of this invention. It is a flowchart which shows operation | movement of the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the shape produced by the metal mold | die creation process of the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the process of arrange | positioning a specific process shape with the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the shape for CAM of the processing system which concerns on one Example (Example 1) of this invention. It is a figure which shows the rough processing shape and specific processing shape of the processing system which concerns on another one Example (Example 2) of this invention. It is a figure which shows another one Example (Example 2) of this invention the parameter of a specific process shape. It is a figure which shows another one Example (Example 2) of this invention of the process path | route of a specific process shape. It is a flowchart which shows operation | movement of another one Example (Example 2) processing system of this invention. It is a schematic fragmentary sectional view which shows the finishing process path | pass by the conventional processing system. It is a figure which shows an example of the specific process shape which can be employ | adopted by this invention. It is a figure which shows an example of the specific process shape which can be employ | adopted by this invention. It is a figure which shows an example of the specific process shape which can be employ | adopted by this invention. It is a figure which shows an example of the specific process shape which can be employ | adopted by this invention. It is a figure which shows an example of the specific process shape which can be employ | adopted by this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  An embodiment (Embodiment 1) of the present invention will be described. FIG. 1 is a schematic configuration diagram of a machining system 100 including a machining path creation system 1 according to the present embodiment.

  In this embodiment, as an example, a case will be described in which a mold shape is designed from shape data of an injection molded product and the mold is processed by a processing machine.

  FIG. 2 is a perspective view showing the outer shape of an injection molded product 200 employed in this embodiment. In this embodiment, the case of an upper case of a mobile phone is taken as an example of the injection molded product 200, and a case where a mold for the injection molded product 200 is processed as a workpiece in this embodiment will be described. Can adopt a mold of an injection molded product of another shape, or a mold used for any other molded product.

  The injection-molded product 200 is formed with a display unit 202 arranged at the upper part, a button part 204 arranged at the lower part, and the like.

  Returning to FIG. 1, the processing system 100 designs a mold shape from the shape data of the injection-molded product 200, and creates a CAD / CAM system 2 for creating processing machine data for performing the mold processing, And a processing machine 4 for processing a die based on the processing machine data created by the CAM system 2.

  The CAD / CAM system 2 controls CAD software 6 for designing a mold shape from the shape data of the injection molded product 200, CAM software 8 for creating NC data from the designed mold shape, and controls these operations. And a control means 10 such as an electronic computer.

  The CAD software 6 includes a mold shape design means 12 for designing an overall mold shape for each of the cavity and the core from the shape data of the injection molded product 200, and the cavity or core designed by the mold shape design means 12. In addition, specific machining shape design means 14 for arranging and designing a specific machining shape, which will be described later, is included.

  The CAM software 8 includes NC data creating means 16 for creating NC data for a portion other than the specific machining shape for the cavity or core designed by the mold shape designing means 12.

  The mold shape design means 12 uses the operation history storage function of the CAD software 6 to store the operation procedure when designing a mold from the shape data of the injection molded product 200 as the operation history, and to determine the mold shape. This operation history storage function is a function possessed by many common CAD software 6. The mold shape design means 12 applies the mold shape operation history storage means 18 for storing the mold design operation procedure for a certain model as master mold data and the shape data of the injection molded product 200 to the master mold data. Then, the mold of the injection molded product 200, that is, the mold shape creating means 20 for creating the mold shape of the cavity and the core, respectively.

  The mold shape operation history storage means 18 has several types of injection molded product shapes as models. For each model, an operation procedure for designing a mold from shape data of the model is used as an operation history. I remember it. Specifically, in the case of the mobile phone of this embodiment, the shape of the mobile phone is classified into several types such as a folding type and a sliding type, and a general shape is used as a model for each type. Then, the operation procedure for designing the mold of each model is stored in the mold shape operation history storage means 18 as master mold data. As the operation procedure, for example, a procedure for creating a scaling model in consideration of the shrinkage rate of the resin with respect to the model shape, a procedure for determining a parting line for the scaling model, and the display unit 202 and the button unit 204 in the scaling model. There are a procedure for arranging a shape corresponding to the above, a procedure for creating a parting model by arranging a resin injection gate inside the display unit 202, a procedure for creating a mold shape by inverting the parting model, and the like.

  The mold shape creating means 20 selects the model closest to the injection molded product 200 among the models stored in the mold shape operation history storage means 18, and the master mold data of the model includes the model of the injection molded product 200. The mold shape for the injection molded product 200 is designed and created by updating the operation history by applying the shape data and executing the design operation. The mold shape is created separately for the cavity and the core.

  In the process of creating the mold shape, the entire design operation procedure from the shape data of the injection molded product 200 to the design of the mold shape is divided into several parts, and intermediate data is created for each divided procedure. May be. For example, the procedure for creating the scaling model, the procedure for creating the parting model, and the like are stored in the mold shape operation history storage means 18 as separate operation histories. The mold shape creating means 20 creates shape data as a result each time each operation history is executed, applies the shape data to the next operation history, updates the next operation history, and progresses halfway The shape data may be created.

  Next, the specific machining shape design means 14 includes the specific machining shape operation history storage means 22 storing the operation procedure for arranging the specific machining shape with respect to the shape data of the injection molded product 200, and the shape of the specific machining shape. And a machining code creation means 24 for creating a machining code for specifying the arrangement and using the machining machine 4, and a shape for CAM for creating shape data for a portion other than the specific machining shape among the shape data of the mold Data creation means 26.

  Here, the specific machining shape refers to a shape that can create a machining path using the machining path creation function of the processing machine 4. The machining path creation function is a function incorporated in many general machining machines. If a predetermined parameter is set for a certain machining shape, the machining machine can be specified by specifying the parameter value. However, this is a function capable of creating a machining path when machining a machining shape. The processing machine 4 can perform processing according to the processing path. In addition, as the processing shape, any shape can be set and registered in the processing machine 4 as long as the shape can be specified by one or more parameters.

  In this embodiment, as an example, as shown in FIG. 3, the slide core is arranged in the undercut portion where the molded product cannot be taken out from the mold as it is as the specific processed shape. Next, the pocket processing part 210 for forming a pocket will be described as an example.

The pocket processing unit 210 is a substantially rectangular parallelepiped, and a shape parameter POK is set as a parameter for specifying the type of the specific processing shape. As parameters for specifying the dimensions of the pocket processing portion 210, a parameter A ₁ for specifying the length dimension, a parameter B ₁ for specifying the width dimension, and a parameter C ₁ for specifying the depth dimension. Is set. These parameters are set with reference to the reference point O ₁ set for the pocket processing section 210. Further, the tool diameter D ₁ of the processing tool used for processing the pocket processing unit 210 is also set as a parameter.

The specific machining shape operation history storage means 22 has an operation procedure for placing a specific machining shape on the mold shape created by the mold shape creation means 20 for each model registered in the CAD software 6. It is stored as an operation history. Specific operation procedures include, for example, a procedure for extracting the shape of the pocket processing unit 210 from the shape data of the mold, and values of parameters A ₁ , B ₁ , C ₁ for specifying the dimensions of the pocket processing unit 210. procedure determining, procedures, etc. to determine the tool diameter D ₁ and the like. Here, in the present embodiment, the operation procedure for arranging the specific machining shape includes a procedure for determining parameters of the specific machining shape. Therefore, in this embodiment, the specific machining shape operation history storage means 22 includes specific machining shape storage means in which parameters of the specific machining shape are stored. As a modification, the specific machining shape storage means is provided separately from the specific machining shape operation history storage means, and the specific machining shape operation history storage means receives the parameters of the specific machining shape from the specific machining shape storage means. An operation procedure to be read may be stored.

The machining code creation means 24 applies the mold shape data to the operation history stored in the operation history storage means 22 for specific machining shape, executes the operation procedure, and performs the specific machining on the mold of the injection molded product 200. A processing code is created by arranging shapes. In the present embodiment, the processing code creating means 24 arranges the pocket processing portion 210 at a position corresponding to the side portion of the injection molded product 200 in the mold, and values of parameters for specifying the shape of the pocket processing portion 210. It determines, and is configured the values of these parameters with the shape parameters POK and information value D ₁ of the parameters of the working tool to create a working code.

  The CAM shape data creation means 26 inputs the shape data in the state in which the die shape created by the mold shape creation means 20 includes the specific machining shape, that is, the solid data of the pocket machining portion 210, to the CAM software 8. Created as CAM shape data. Note that as the CAM shape data, shape data that does not include the solid data of the pocket processing unit 210 may be created as the CAM shape data.

  The processing machine 4 includes a processing path storage unit 28 storing a processing path related to a specific processing shape, and a processing data generated by the processing code generation unit 24 based on the processing path stored in the processing path storage unit 28. Machining path creation means 30 for creating a machining path corresponding to the machining path, and machining means 32 for machining the mold according to the machining path created by the machining path creation means 30 and the NC data created by the NC data creation means 16 of the CAM software 8. And a control means 34 for controlling the operation of the processing machine 4.

  The CAD / CAM system 2, the machining path storage means 28, the machining path creation means 30, and the control means 34 are provided to constitute the machining path creation system 1 of this embodiment.

  The machining path storage means 28 stores a machining path for a specific machining shape. For example, as shown in FIG. 4, the processing path of the pocket processing unit 210 is a processing path in which a rectangular spiral path from the outer periphery toward the inside is repeated for each predetermined dimension depth.

  The machining path creation means 30 applies the value of the parameter included in the machining code created by the machining code creation means 24 to the machining path stored in the machining path storage means 28, and the machining path corresponding to the specific machining shape. Is configured to create.

  Next, operation | movement of the processing system 100 of a present Example is demonstrated.

  FIG. 5 is a flowchart showing the operation of the processing system 100 of the present embodiment. First, in step S1, a model having a shape closest to the shape of the injection molded product 200 is selected from the models registered in the CAD software 6. In step S <b> 2, the control means 10 of the CAD / CAM system 2 reads out the mold design operation history related to the selected model from the mold shape operation history storage means 18.

  In step S3, the mold shape creating means 20 applies the shape data of the injection molded product 200 to the operation history read from the mold shape operation history storage means 18, and updates the operation history to thereby obtain an operation history. Execute the operation. For example, the mold shape creating means 20 creates a scaling model by multiplying the shape data of the injection-molded product 200 by a predetermined shrinkage rate, determines a parting line as a split surface of the cavity and the core in the scaling model, and Cavities and cores are set above and below the contour line, and the shapes of the cavities and the cores are reversed. The mold shape creating means 20 creates mold shape data obtained by updating the operation history. In this way, in step S3, as shown in FIG. 6, a core die shape 214 excluding the one for the specific processing shape is created from the rectangular parallelepiped blank model 212.

  In the following, since the operations for creating the mold cavity and the core are the same, only the case of creating the core will be described.

  Next, in step S <b> 4, the control unit 10 reads the operation history for the specific machining shape related to the selected model from the operation history storage unit 22 for the specific machining shape.

  In step S <b> 5, the machining code creation unit 24 applies the shape data of the core mold shape 214 created by the mold shape creation unit 20 to the operation history read from the specific machining shape operation history storage unit 22. The operation history is operated by updating the history. In the present embodiment, as shown in FIG. 7, the processing code creating means 24 includes pockets in the undercut portion 216 arranged at a position corresponding to the inner side portion of the injection molded product in the core die shape 214. A processing unit 210 is disposed.

In step S6, the machining code creating means 24 determines the values of parameters A ₁ , B ₁ , C ₁ for specifying the dimensions of the pocket machining portion 210 from the core shape data, and designates the type of the specific machining shape. The machining code is created together with the parameter POK to be performed and the parameter D1 for designating the type of tool. The processing code is described as, for example, POK: D ₁ 10, A ₁ 100, B ₁ 60, C ₁ 40. Although omitted here for convenience, the processing code POK actually includes information on the position (relative to the reference point set on the workpiece) of the pocket processing unit 210 specified by the parameters X, Y, and Z. included. The processing code is preferably created in the form of text data, and may be stored in a storage medium so that it can be transferred to the processing machine 4.

  In step S7, the control means 34 of the processing machine 4 inputs the machining code created by the machining code creation means 24 of the CAD / CAM system 2, and sets the parameter POK that specifies the type of the specific machining shape among the machining codes. Based on the processing path storage means 28, the processing path related to the pocket processing unit 210 is read out.

In step S8, the machining path creation means 30 applies the machining code parameters to the machining path read from the machining path storage means 28 using the machining path creation function of the machining machine 4, and the actual machining machine 4 is processed. Create a machining path. Specifically, based on the reference point O ₁ (for example, the position is specified by XYZ coordinate values) and the parameters A ₁ , B ₁ , C ₁ that specify the shape of the specific processing shape, the length of the pocket processing unit 210 is determined. By grasping the dimensions, width dimensions, and depth dimensions, the machining start point, movement distance, etc. of the machining tool are determined. Further, a tool to be used for machining the pocket machining unit 210 is selected based on the parameter D ₁ for designating the tool diameter of the machining tool.

  In step S <b> 9, the processing machine 4 uses the selected processing tool to perform processing for forming a pocket in the die blank model 212 according to the processing path.

  On the other hand, after the creation of the machining code by the machining code creation means 24 of the CAD / CAM system 2 in step S6, in step S10, the CAM shape data creation means 26 determines the shape data of the mold shape 214 and the pocket machining. Based on the shape data of the part 210, as shown in FIG. 8, the state including the shape data of the pocket processing part 210, that is, the state where the solid data of the pocket processing part 210 is included in the shape data of the mold shape 214 The CAM shape data of the CAM shape 218 is created.

  In step S11, the NC data creating means 16 of the CAM software 8 creates NC data by a method similar to the conventional one based on the CAM shape data. This NC data is transferred to the processing machine 4.

  And in step S12, the processing machine 4 performs the process which forms core shapes other than a pocket in the blank model of the metal mold | die in which the pocket was formed according to NC data.

  As described above, the overall shape and pocket of the core are designed from the shape data of the injection molded product 200 and processed by the processing machine 4. In addition, a mold can be created with respect to the cavity by the same procedure.

  According to the present embodiment configured as described above, the following excellent effects can be obtained.

  The machining code creation means 24 determines the parameter value of the pocket machining section 210 and creates a machining code, and the machining path creation means 30 of the processing machine 4 uses the machining path creation function to directly process the machining path from the machining code. Create Therefore, since it is not necessary to create NC data for the pocket machining portion 210 having a specific machining shape, the machining path creation time can be shortened. Here, the process of creating a machining path from the machining code is immediately executed by the processing machine 4, so that the machining of the pocket machining unit 210 can be started quickly. Further, since it is not necessary to create NC data for the shape of the pocket processing unit 210, the burden of NC data creation processing in the CAM software 8 can be reduced.

  For the pocket machining unit 210, a machining code is created and a machining path is created by the processing machine 4, and NC data is created by the CAM software 8 for the shape of the mold other than the pocket machining unit 210. The machining path creation work relating to 210 and the machining path (NC data) creation work for core shapes other than the pocket machining part 210 can be performed separately and in parallel. Therefore, the processing path creation time can be shortened also by this. In addition, after creating the machining code of the pocket machining unit 210, NC data on the core shape other than the pocket machining unit 210 is simultaneously processed by the CAM software 8 while performing the machining operation of the pocket machining unit 210 with the processing machine 4. Can be created. Therefore, the overall work time from mold design to mold processing can be shortened.

A reference point O ₁ is set for the pocket processing portion 210, and the shape of the pocket processing portion 210 is set as parameters of the length dimension A ₁ , the width dimension B ₁ , and the depth dimension C ₁ with reference to the reference point O _1. Therefore, the machining path creation means 24 can set a machining path with reference to the reference point O ₁ . Therefore, for example, machining path data can be simplified and data processing can be performed more quickly than in the conventional method of creating NC data for a pocket machining portion based on a reference point set in the core. be able to.

Machining path storage unit 28 stores the appropriate type of machining tool for machining the pocket machining unit 210, the processing code generator means 24 because it determines the values of the parameters of the tool diameter D _1, the pocketing 210 At the same time as specifying the arrangement, shape, etc., the type of processing tool to be used can be determined. Therefore, the processing operation with the processing machine 4 can be performed quickly.

  Since the machining path storage means 28 stores in advance an appropriate machining path and machining tool for the pocket machining section 210, an optimum machining path and machining tool for an expert worker to machine each specific machining shape in advance. Can be set and stored. Therefore, the know-how when the skilled person sets the machining path and determines the machining tool can be incorporated into the machining system 1 and accumulated. Thereby, even if it is not a skilled worker, it can process on simple and more reliable conditions.

  The mold shape operation history storage means 18 stores a design operation procedure for designing a mold shape as an operation history, so that an optimum mold design operation procedure obtained by trial and error by a skilled worker is arranged. Can be stored as master type data. Therefore, it is possible to accumulate the mold design know-how of skilled workers, and even if not skilled workers, it is possible to easily and accurately mold design by using the operation history stored in the operation history storage means. It can be carried out.

  Another embodiment (embodiment 2) of the present invention will be described. In the present embodiment, the mold shape 214 of the core of the mold is designed from the blank model 212 shown in FIG. 6 using the machining system 1 according to the first embodiment, and the rough machining shape as the workpiece of the present embodiment is designed. A case will be described as an example in which a die shape 214 is designed and processed by rough machining, and then the die shape 214 is finished.

  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant descriptions are simplified or omitted.

  FIG. 9 is an exploded perspective view showing a rough machining shape and a specific machining shape machined by the machining system 1 according to the present embodiment. As shown in FIG. 9, in this embodiment, a first machining area 222 and a second machining area 224 are set, and a rough machining shape 220 is formed by removing these machining areas 222 and 224 from the blank model 212 (FIG. 6). Create The rough processing shape 220 has a convex portion 221 for forming the shape of the upper cover of the mobile phone at the center of the upper surface of the rectangular parallelepiped. The first processed region 222 is formed around the convex portion 221 of the rough processed shape 220 and has a rectangular shape having a rectangular opening 226 at the center. The second machining area 224 is formed on the upper side of the first machining area 222 and has a rectangular shape having the same dimension as the outer dimension of the blank model 212, that is, the outer dimension of the rough machining shape 220 of the core.

Here, as a parameter for specifying the shape and arrangement of the specific processing shape of the present embodiment, the first processing region 222 has a shape for specifying the type of the first processing region 222 as shown in FIG. As parameters for specifying the parameter HOL, the reference point O _2, and the dimension of the first machining area 222, the length dimension A ₂ , the width dimension B ₂ , the depth dimension C ₂ of the opening 226, and the machining tool A tool diameter parameter D ₂ for specifying the tool diameter is set. The parameters of the second machining area 224 are the same as those of the pocket machining section 210 of the first embodiment, that is, the reference point O ₁ , the shape parameter POK, the dimension parameters A ₁ , B ₁ , C ₁ , and the tool radius parameter D. ₁ is set.

  The specific machining shape operation history storage means 22 of the present embodiment stores a design operation procedure for arranging a machining area for rough machining for each model as master type data. Specifically, the specific machining shape operation history storage means 28 of the present embodiment stores the shapes of the first machining area 222 and the second machining area 224 based on the shape data of the blank model 212 and the core die shape 214. , A procedure for determining parameter values of the first machining area 222 and the second machining area 224, a procedure for determining the tool diameter D, and the like are stored.

The machining path storage means 30 of this embodiment stores machining paths related to the first machining area 222 and the second machining area 224, respectively. FIG. 11 shows a machining path of the first machining area 222 of the present embodiment. As shown in FIG. 11, the machining path for the first machining area 222 moves from the outside in a rectangular spiral shape, and machining to a depth dimension C ₂ leaving a rectangle with a length dimension A ₂ and a width dimension B _2. Is set to For the second machining region 224, the same machining path as the pocket machining unit 210 of the first embodiment is set.

  Next, the operation of the machining system 1 according to the present embodiment having such a configuration will be described.

  FIG. 12 is a flowchart illustrating the operation of the machining system 1 according to the present embodiment. As shown in FIG. 12, in step S21 to step S23, the core mold shape 214 is created from the shape data and model of the injection-molded product, similarly to step S1 to step S3 of the first embodiment.

  In step S <b> 24, the control unit 10 reads the operation history for the specific machining shape related to the model selected at the time of the mold shape design from the operation history storage unit 22 for the specific machining shape.

  In step S25, the machining code creation means 24 applies the shape data of the mold shape 214 to the operation history stored in the specific machining shape operation history storage means 22, thereby updating the operation history. A design procedure for arranging the machining area 222 and the second machining area 224 is executed. In the present embodiment, the first machining area 222 is arranged above the blank model 212 and the second machining area 224 is arranged above the first machining area 222.

In step S <b> 26, the machining code creation means 24 determines the values of the parameters A ₂ , B ₂ , and C ₂ for specifying the dimensions of the first machining area 222 from the shape data of the core die shape 214, and the machining tool. The value of the parameter D ₂ for specifying the tool diameter is determined, and a processing code is created together with the parameter HOL for specifying the type of the first processing region 222. The processing code is described as, for example, HOL: D ₂ 10, A ₂ 50, B ₂ 70, C ₂ 50. Further, the machining code creating means 24 creates machining data for the second machining area 224 in the same manner. The machining code of the second machining area 224 is the same as the machining code for the pocket machining unit 210 of the first embodiment. These processed data are preferably created in the form of text data, and may be stored in a storage medium so that they can be transferred to the processing machine 4.

  In step S27, the control means 34 of the processing machine 4 inputs the machining code created by the machining code creation means 24 of the CAD / CAM system 2, and among the machining codes, a parameter HOL for designating the type of a specific machining shape and Based on the POK, the machining paths related to the first machining area 222 and the second machining area 224 are read from the machining path storage means 28, respectively.

In step S <b> 28, the machining path creation means 30 applies the machining code parameter to the machining path read from the machining path storage means 28 using the machining path creation function of the machining machine 4 to process the machining machine 4. Create a path. Specifically, first, the length dimension, the width dimension, and the depth dimension of the first machining area 222 are grasped based on the parameters A ₂ , B ₂ , and C ₂ that respectively specify the dimensions of the first machining area 222. Then, the machining path of the machining tool is determined and the machining path is created. Further, a tool to be used for machining the first machining area 222 is selected based on the parameter D ₂ that specifies the tool diameter of the machining tool. Similarly, with respect to the second machining area 224, the machining start point, the moving distance, etc. of the second machining area 22 are determined based on the dimension parameters A ₁ , B ₁ , C ₁ and the tool diameter parameter D _1. Create a machining path and select the tool to use.

  In step S <b> 29, the processing unit 32 starts processing the first processing region 222 and the second processing region 224 according to the processing path created by the processing path creation unit 30. In this case, the second machining area 224 is first machined into the blank model 212, and then the machining of the first machining area 222 is executed on the model for which the machining of the second machining area 224 has been completed.

  By this processing, rough processing is performed on the blank model 212, and a rough processing shape 220 as a product in the present embodiment is formed.

  On the other hand, after the first machining area 222 and the second machining area 224 are arranged in step S26, the shape for the CAM shape creation means 26 after the first machining area 222 and the second machining area 224 are machined in step S30. The shape data of the rough processed shape 220 is created. Here, since the first machining area 222 and the second machining area 224 as the specific machining shape are handled as solid data, the rough machining shape 220 is obtained from the solid data of the blank model 212 using the first machining area 222 and By simply subtracting the second machining area 224, it is obtained as solid data.

  In step S31, the control means 10 inputs the solid data of the rough machining shape 220 and the core mold shape 214 to the CAM software 8, and the NC data creation means 16 extracts the core mold shape 214 from the rough machining shape 220. NC data for processing is created by a conventional method.

  In step S 32, the processing machine 4 further finishes the model of the rough machining shape 220 processed in step S 29 according to the NC data created by the NC data creation means 16 to form a core die shape 214. .

  By the method as described above, rough machining of the mold is performed using the processing path creation function of the processing machine 4.

  According to the present embodiment (embodiment 2) as described above, the following effects can be obtained in addition to the same effects as the effects of the first embodiment.

Since the processing code creating means 24 specifies the first processing region 222 and the second processing region 224 with the dimensional parameters A ₂ , B ₂ , C ₂ and A ₁ , B ₁ , C ₁ , these first processing regions 222 and the second machining area 224 can be handled as solid data. Therefore, when the CAM shape data creation means 26 creates the shape data of the rough machining shape 220, the rough machining shape can be obtained by simply subtracting the first machining area 222 and the second machining area 224 from the blank model 212. 220 solid data can be obtained.

  Here, in a conventional case where rough machining is performed using NC data, the rough machining shape after the rough machining is not created as solid data. For this reason, in order to grasp the shape after rough machining as solid data, it is necessary to separately calculate using software for generating solid data from NC data for rough machining, which requires a lot of time and cost.

  On the other hand, in the present embodiment, the machining code creation means 24 sets the first machining area 222 and the second machining area 224 to be roughly machined as parameters, so that the shapes of these machining areas are grasped as solid data. Therefore, the solid data of the rough machining shape 220 can be easily created.

  Conventionally, when rough machining is performed using NC data, as described above, the rough machining shape after the rough machining cannot be grasped as solid data. As described above, since it is expensive to create solid data from NC data, NC data is usually created as it is even in finishing, but this has the following problems.

  FIG. 13 is a schematic partial cross-sectional view showing a finishing processing path for a processing shape after rough processing by a conventional processing system. As shown in this figure, the rough machining shape 230 is formed by machining a rough machining region 234 from a blank model 232. In the case of setting a finishing process pass 238 for processing the finished shape 236 by a conventional processing method with respect to the rough processed shape 230, a processing required part 240 in which a lot of unprocessed portions remain in the processing path 238, In fact, there are mixed processed parts 242 in which roughing is performed and no material to be processed exists. However, in the conventional machining system, since the rough machining shape is not grasped as solid data, it is not possible to grasp the machining necessary part 240 and the machined part 242. Therefore, for example, a considerable safety factor is estimated and machining is performed with a shallow depth of cut from a position farther than the actual machining start position so that the machining tool is not cut too deeply and an excessive load is applied to the machining tool. It is necessary to set to do. Also, when passing through the machined part 242, it is necessary to make a setting for moving the machining tool at a very slow speed for machining. For this reason, there is a lot of waste in the set machining path.

  On the other hand, in the present embodiment, the machining code creation means 24 specifies the first machining area 222 and the second machining area 224 with parameters, so that these machining areas 222 and 224 can be grasped as solid data. Therefore, the rough machining shape 220 after the rough machining can be grasped as solid data. Therefore, for example, the machining tool can be rapidly fed to the machining start position at the machining required portion 240 in FIG. Further, it is possible to set an appropriate cutting depth for processing the processing required portion 240. Furthermore, since it is not necessary to send the processing tool to the processed portion 242 at a low processing speed when processing, it can be set to fast-forward. Thus, according to the machining system 1 of the present embodiment, an efficient machining path can be set based on the solid data of the rough machining shape 220.

  As described above, the present invention has been described with reference to two examples. However, as will be apparent to those skilled in the art, the embodiments for realizing the present invention are not limited to the above-described first and second examples. .

  For example, in the present invention, the specific processed shape can be set to an arbitrary shape as long as the type and size can be specified by parameters. 14-19 show examples of other specific processing shapes that can be set in the present invention.

  The specific processing shape shown in FIG. 14 is a shape when holes 250 are arranged at predetermined intervals. The processing code for specifying the specific processing shape includes, for example, a parameter HOL for specifying the shape, a vertical interval A between adjacent holes 250, a horizontal interval B between adjacent holes 250, and a diameter of the hole 250. By determining the parameter values of D, the number V of the vertical holes 250, and the number H of the horizontal holes H, for example, HOL: A100, B100, D30, V3, and H3 can be created.

  The specific processed shape shown in FIG. 15 is a circular shape 252. The machining code for identifying the specific machining shape determines, for example, parameters CIR, tool diameter D, finishing circle radius U, high-speed feed section R, and circular shape depth C for specifying the shape. Thus, for example, it can be created as CIR: D10, R50, H70, C40.

  The specific processing shape shown in FIG. 16 is a pocket shape 254 arranged with an angle with respect to the coordinates of the material to be processed. The processing code for specifying the specific processing shape is, for example, parameter values for parameters CIR, tool diameter D, length dimension A, width dimension B, inclination angle E, and depth dimension C for specifying the shape. Can be created as CIR: D10, A50, B70, E30, C40, for example.

  The specific machining shape shown in FIG. 17 is a machining shape 256 formed by moving the machining tool into a trochoid shape. The processing code for specifying the specific processing shape includes, for example, a parameter HOL for specifying the shape, a tool diameter D, a cutting portion length A, a cutting portion width B, a single cutting width K, and an arc radius R. , And by determining the value of the depth C parameter, for example, HOL: D10, A50, B70, K12, R12, C50 can be created.

  The specific processing shape shown in FIG. 18 is a special shape 258 that combines a linear processing shape such as a groove for a D-cut pin and a circular processing shape. The processing code for specifying the specific processing shape includes, for example, a parameter CIR for specifying the shape, a tool diameter D, a radius R of the circular portion 260, a protruding length F of the linear portion 262 from the outer periphery of the circular portion 260, And by determining the value of the parameter of the depth C, for example, it can be created as CIR: D10, R30, F7, C40.

  In addition, the specific processing shape is not limited to the above-described shape, and any processing shape or CAD can be set as long as the shape can be specified by setting an arbitrary number of parameters. You can register with the software.

  In Examples 1 and 2, as an example, when designing a mold with CAD software, the mold is designed by applying product shape data to the master mold data using the operation history storage means. Although a specific processing shape is set, as will be apparent to those skilled in the art, the present invention is not limited to such an embodiment. For example, without using the operation history function, a specific machining shape may be arranged in a mold using CAD software, and an operation for determining a parameter value of the specific machining shape may be performed according to the shape.

  In the first and second embodiments, as an example, the case of designing and processing a mold for molding an injection-molded product from the shape data of the injection-molded product has been described, but it will be apparent to those skilled in the art. In addition, the present invention is not limited to such an embodiment. For example, it can be used to design the processing shape of an arbitrary product, such as creating a processing path for roughing and finishing when manufacturing the product shape itself by cutting.

  In the implementation of the present invention, the CAD software and the CAM software do not need to be separate softwares, and a single software having both functions may be used. In addition, if all machining shapes can be specified by specific machining shapes, it is not necessary to create NC data using CAM software, so CAM software is not necessarily required.

  Further, as will be apparent to those skilled in the art, all of the code names (POK, CIR, HOL, etc.) exemplified in the first and second embodiments are fictitious code names. These codes are actually described by, for example, G codes, and the names vary depending on the processing machine.

  Furthermore, in carrying out the present invention, the machining path creation system uses a machining path creation function of a processing machine as a program for causing a computer to execute a procedure for creating a machining code by arranging a specific machining shape. The procedure for creating the machining path may also be provided as a program for causing a computer to execute or in the form of a storage medium in which these programs are stored.

  The machining path creation system and the machining path creation method according to the present invention can be used to create a mold for manufacturing a product by injection molding from the product shape data, and the product shape itself by cutting a material. It can also be used when forming.

DESCRIPTION OF SYMBOLS 1 Machining path creation system 2 CAD / CAM system 4 Machining machine 6 CAD software 8 CAM software 22 Operation history storage means 24 for specific machining shape Machining code creation means 28 Machining path storage means 30 Machining path creation means 100 Machining system 200 Product 210 pocket Processed portion 220 Roughly processed shape 222 First processing region 224 Second processing region

Claims (6)

A processing path creation method for creating a processing path for processing a workpiece in the processing machine by using a processing machine and CAD software running on a computer connected to the processing machine,
The CAD software extracting a specific machining shape capable of creating a machining path using a machining path creation function of the processing machine from the shape data of the workpiece;
The CAD software creates a machining code by determining a parameter value for identifying the shape of the specific machining shape according to the shape data of the workpiece;
The processing machine creates the machining path from the created machining code based on a machining path preset for the specific machining shape using a machining path generation function of the machining machine. When,
A machining path creation method characterized by comprising: The processing path creation method according to claim 1,
In the step of creating the machining code, the CAD software sets a reference point for the specific machining shape, and determines the parameter value based on the reference point.
A machining path creation method characterized by that. A processing path creation method according to claim 1 or 2,
In the step of creating the machining code, the CAD software determines a value of a parameter of a machining tool to be used according to the specific machining shape.
A machining path creation method characterized by that. Processing machine,
A computer connected to the processing machine,
A machining path creation system for creating a machining path for machining a workpiece in the processing machine,
A storage unit for specific machining shape in which parameters for specifying the shape of a specific machining shape capable of creating a machining path using the machining path creation function of the processing machine are stored;
Machining path storage means storing a machining path corresponding to the specific machining shape;
Processing code creating means for extracting the specific machining shape from the shape data of the workpiece and creating a machining code by determining the value of the parameter according to the extracted shape data of the workpiece;
A machining path creating means for creating the machining path from the created machining code using a machining path generation function of the processing machine,
A machining path creation system characterized by comprising: A machining path creation program for creating a machining path for machining a workpiece in the processing machine when executed by a computer connected to the processing machine and configured to run CAD software;
When executed by the computer, the computer
Means for causing the CAD software to extract a specific machining shape capable of creating a machining path using a machining path creation function of the processing machine from shape data of the workpiece;
Means for causing the CAD software to create a machining code by determining a value of a parameter for identifying the shape of the specific machining shape according to the shape data of the workpiece; and
Means for causing the processing machine to create the processing path from the created processing code based on a processing path preset for the specific processing shape by using a processing path generation function of the processing machine. ,
Machining path creation program characterized by functioning as   A computer-readable recording medium on which the machining path creation program according to claim 5 is recorded.

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