JP2008149382A - Method and system for generating nc data for boring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system for generating NC data corresponding to a shape of a hole automatically. <P>SOLUTION: Hole shape data of a product is prepared on CAD (S100), and CAM accepts the hole shape data of the product and recognizes a hole shape data of a mold obtained by inverting the hole shape data of the product (S110). The information for indicating characteristics of the shape of the hole is extracted (S120), a machining start position and a machining end position in a workpiece are computed to decide a machining position (S130), machining ID (S140), and a machining pattern based on the machining ID (S150). Effective length of a tool is checked (S160), values of the parameters for controlling operation of the tool are decided (S170), and interference of a holder is checked (S180) to generate the NC data (S190). The NC data is divided depending on service life of the tool (S200), order of priority in use of the tool is decided (S210), and machining information is transmitted to a worker for machining (S220) to start machining (S230). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method and system for creating NC data for processing a mold with a mold processing machine. In particular, it relates to a method and system for automatically generating NC data for a hole shape of a mold.

  Conventionally, when creating an NC path for a mold hole shape, the mold designer uses CAD software to design a 3D hole shape model, and then supports the designed 3D hole shape model. Create a two-dimensional drawing. Then, in the CAM software, the machining operator confirms the hole position, depth, hole type, etc. based on this two-dimensional drawing and machining instruction, specifies the tool used for machining, and sets the NC path. Settings are made to output as machining data. That is, in the conventional method, the mold designer needs to create a two-dimensional drawing even though the hole shape model is designed as three-dimensional data on CAD. In addition, it is necessary for the processing operator to check the hole position, depth and hole type one by one from the two-dimensional drawing on the CAM. There are cases where it is impossible to deal with inexperienced people because it involves examining the pattern.

  On the other hand, Patent Document 1 excludes the creation of a two-dimensional drawing corresponding to a hole shape model by creating hole shape model data as data that can be commonly used in CAD and CAM. is suggesting. However, in order to automatically generate NC data, it is necessary to automatically select machining conditions and tools based on the shape of the hole. In the method disclosed in Patent Document 1, various hole shapes are used. It cannot be said that it can respond sufficiently. In order to automatically generate NC data based on the hole shape model data on CAD, it is necessary to automatically specify at least the selection of the tool and the operation of the tool.

JP-A-11-85239

  The present invention has been made based on the technical background as described above, and an object thereof is to provide a method and system for automatically creating NC data corresponding to a hole shape created by a three-dimensional CAD. It is in.

In order to solve the above problems, the present invention has the following configuration. According to one aspect of the invention,
Using a computer that defines and stores a shape characteristic of a hole to be an NC path generation and a predetermined table for identifying the tool used and the NC path based on the shape characteristic of the hole, A system that automatically generates an NC path for a hole shape of a mold,
The shape characteristic of the hole that is the target for generating the NC path is:
Hole type, hole end characteristics indicating whether it is a through hole or a retaining hole, presence or absence of entrance chamfering, entrance chamfer size, processing direction, processing machine used, workpiece material, gold for hole processing The center position of the hole on the surface of the mold model, the diameter of the hole, and the depth of the hole are defined and stored on the computer as each element,
The predetermined table includes a machining pattern table and a tool operation control table,
The machining pattern table includes a tool to be used, a machining cycle instructing an operation unit of the tool to be used, and a machining pattern instructing a type of machining specified by a combination of each element of the shape characteristic of the hole. A pattern is associated to identify the tool used and the machining cycle of the tool used;
The tool operation control table associates the workpiece material, the used machine, the used tool, the machining cycle, and the numerical value of the control parameter that controls the operation of the tool,
The system
A processing distance for specifying a cutting range in the depth direction of the hole based on the center position of the hole and the depth of the hole stored in the computer, and calculating a processing start position and a processing end position in the mold model A calculation means;
A machining pattern is specified by a combination of the diameter of the hole, the type of the hole, the hole end characteristic, the presence / absence of the entrance chamfer, and the size of the entrance chamfer stored in the computer, and the machining pattern Machining pattern determination means for determining at least one tool used corresponding to the machining pattern and a machining cycle corresponding to the tool used based on the table;
Operation control parameters of the used tool corresponding to the workpiece material and the used processing machine stored in the computer, the used tool determined by the processing pattern determining means, and the processing cycle of the used tool Use tool motion control parameter value determining means for determining a value based on the tool motion control table;
NC path output means for outputting an NC path based on the machining direction, the machining start position, the machining end position, the used tool, the machining cycle, the machining pattern, and a control parameter value of the used tool. A system characterized by this is provided.

In a preferred embodiment, in the system,
The diameter of the hole and the depth of the hole stored in the computer;
Based on the tool shape table defined and stored in the computer, with the shape data of each tool used as an element,
It is determined whether or not the tool used determined by the machining pattern determining means interferes with the mold model at the time of machining, and if it interferes with the mold model, it is already determined based on the machining pattern determining means. There is provided a system characterized by further comprising first tool effective length check means for re-determining a tool longer than the used tool as a new tool.
In another preferred embodiment, in the system,
The diameter of the hole and the depth of the hole stored in the computer;
Based on the tool shape table defined and stored in the computer, with the shape data of each tool used as an element,
It is determined whether or not the tool used determined by the machining pattern determining means interferes with the mold model at the time of machining, and if it interferes with the mold model, it is already determined based on the machining pattern determining means. Second tool effective length check means for further determining a tool used longer than the determined tool used in addition to the tool used determined,
In the NC path output means,
The NC path for the long tool used when the long tool used is further determined by the second tool effective length check means is based on a command for controlling the movement of the processing machine table supporting the die model and the spindle. A system is provided wherein the previously selected tool is output only for areas that cannot be cut due to interference with the mold model.
Further, in the system including the first tool effective length check unit and the second tool effective length check unit, the first tool effective length is determined based on characteristics indicated by each machining cycle stored in the computer. There is provided a system further comprising selection means for selecting either the check means or the second tool effective length check means.

Furthermore, in another preferred aspect, in the system, the tool motion control table further associates a work material, a used machine, a used tool, a machining cycle, and a use holder specified from a combination thereof,
The tool usage control parameter value determining means further includes the workpiece material and the used processing machine defined and stored in the computer, the used tool determined by the processing pattern determining means, and the processing cycle. The holder to be used is determined based on the tool operation control table,
Further, when the shape of the mold model to be drilled is defined and stored in the computer, the shape of the mold model,
A central position of the hole stored in the computer;
Based on the holder shape table defined and stored in the computer, with the shape data of each holder used as an element,
It is determined whether or not the use holder determined by the tool motion control parameter value determining means interferes with the mold model at the time of machining. When the tool holder interferes with the mold model, the use tool motion control parameter value is determined. There is provided a system characterized by comprising a holder interference checking means for reselecting a holder having a smaller outer diameter than the holder already determined based on the determining means and capable of mounting the tool to be used.

Furthermore, in another preferred aspect, in the system, a life time is defined and stored for each tool used as a usable time of a preset tool on the computer.
When the lifetime is compared with the NC path output by the NC path output means and the time required for processing specified by the processing machine used, the time required for the processing is longer than the lifetime for the tool used A plurality of used tool determining means for specifying a plurality of used tools required by dividing the time required for the machining by the lifetime.
When a plurality of tools used are specified by the tool for multiple use determination, machining corresponding to each of the plurality of tools used based on a command for controlling the movement of the spindle table and the spindle table supporting the mold model. There is provided a system characterized by comprising NC path re-output means for determining the start position and outputting the NC path again.

  Furthermore, in another preferable aspect, in the system, a machining priority order table including a plurality of tools used and a priority of use of each of the tools used, which is defined and stored on the computer, and cutting A system further comprising a multiple-use tool order determining means for determining the order in which the tools are used from each of the tools used corresponding to the machining patterns of all the holes to be processed and the machining cycle of each hole. Is provided.

  According to the present invention, it is possible to automatically create NC data corresponding to a hole shape created by three-dimensional CAD, and appropriately select a tool to be used for machining and perform machining under stable machining conditions. Can do.

  Embodiments of the present invention will be described below with reference to the drawings. However, the following description is merely an example of the present invention, and the technical scope of the invention is not limited by the following description.

  A system for creating NC data of a hole shape model according to an embodiment of the present invention includes a CAD system and a CAM system, and a computer for executing NC data creation software according to the present invention. The designer can perform necessary operations while being guided by the NC data creation software according to the present invention on the computer screen, and can create NC data for the hole shape of the mold to be designed. The NC data creation software according to the present invention is designed so as to be able to exchange data with a CAD system and a CAM system. Further, the CAD system, the CAM system, and the NC data creation software according to the present invention may be configured to be executed on the same computer, or may be configured to be executed on another computer. Good.

  Also, in order to be able to handle 3D data related to products having a hole shape and 3D data related to a mold having a hole shape, a mold coordinate axis that is used in a CAD system or a CAM system is defined inside the computer. It is assumed that this mold coordinate axis is associated with the software according to the present invention.

  Below, the whole flow which produces | generates NC path | pass corresponding to the hole shape of the metal mold | die which concerns on this invention shown by FIG. 1 is demonstrated. First, product hole shape data is created by a CAD system (S100) and stored in a storage device. Then, the hole shape data of the product is read from the storage device and passed to the CAM system, so that the CAM system can accept the hole shape data of the product and recognize the hole shape data of the mold obtained by inverting the hole shape data of the product. (S110). In addition, in the hole shape data of the mold, RGB values indicating hole shape characteristics and the like as information for further classifying each hole type for processing, the center position of the hole in the workpiece (hole cylinder position) , Hole diameter, hole depth (hole cylinder length) and workpiece shape, and are stored in the computer in association with the coordinate values of the mold coordinate axes defined by the CAM system. Since the RGB value is data commonly recognized in the CAD system and the CAM system in general, information for further classifying each hole type for processing is represented as an RGB value, and the RGB value is obtained from the CAD system. It is configured to deliver to the CAM system. FIG. 2 shows an example of an RGB table in which RGB values and shape characteristic information of various holes corresponding thereto are registered. In the RGB table, as information corresponding to each of the RGB values, the type of the hole, the hole end characteristics indicating whether it is a through hole or a retaining hole, the presence or absence of the entrance chamfer, the size of the entrance chamfer, the processing direction Information on the processing machine used for processing and the material of the workpiece is shown.

  Next, information indicating the shape characteristic of the corresponding hole is extracted from the RGB values in the computer equipped with the CAM (S120). That is, in S120, based on the RGB table shown in FIG. 2, from the RGB values recognized by the CAM in S110, the hole type, the hole end characteristic indicating whether it is a through hole or a retaining hole, and the entrance Information on the presence or absence of chamfering, the size of the chamfer at the entrance, the processing direction, the processing machine used for processing, and the material of the workpiece are extracted. In the example of FIG. 2, when the RGB value is “155”, the hole end characteristic indicating whether the hole type is a cut hole (identification value 10), a through hole or a retaining hole, is a through hole. (Identification value 0), presence or absence of chamfering at the entrance is no chamfering (identification value 0), the size of the entrance chamfering is a numerical value 1, the machining direction is the negative direction of the Z axis of the mold coordinate axis (identification value -1), Information indicating the hole shape characteristics is extracted assuming that the processing machine to be used is machine A (identification value 10) and the material of the workpiece is metal 104 (identification value 40).

  Next, the cutting range in the depth direction of the hole is specified as the range of the coordinate value of the mold coordinate axis from the center position of the hole and the depth of the hole recognized by the CAM system, and the workpiece ( The machining start position and machining end position in the mold model) are calculated to determine the machining position (S130).

  Next, the machining ID is determined from the hole diameter value recognized by the CAM in S110 and the identification values of the hole type, hole end characteristics, entrance chamfered presence, and entrance chamfer size extracted in S120. Is determined (S140). The machining ID is an identification value that specifies what tool is used for each hole shape and how to operate the tool (s). As specific values, for example, when the RGB value acquired in S110 is “155” and the hole diameter is “34”, the processing ID is the type of hole corresponding to the RGB value “155”, the hole end Next to “100011040” in which the identification values of the characteristics, the presence or absence of entrance chamfering, the size of entrance chamfering, the processing machine used for processing, and the material of the workpiece are arranged in this order, the value of the hole diameter “ “034” are displayed side by side as “1000011040034” (see FIG. 2).

  Next, a processing pattern is determined based on the processing ID (S150). Here, the machining pattern is defined as indicating each tool used to machine the hole to be machined and the operation cycle of each tool, and the hole diameter, hole type, hole end characteristics, It is specified by the processing ID that indicates the presence or absence of the entrance chamfer and the size of the entrance chamfer. The machining pattern corresponding to the machining ID is determined based on a machining pattern table in which the operating tool and the operation cycle for each used tool are registered as the machining pattern corresponding to the machining ID as shown in FIG. The The processing pattern table is registered in advance in a computer equipped with a CAM. Specific examples of the operation cycle shown in FIG. 3 include, as shown in FIG. 4, drill / spot drilling cycle (G81, G82), deep drilling cycle (G73, G83), tapping cycle (G84), boring cycle (G85). ) And counterbore processing. The machining pattern when the machining ID is “100011040034” is shown as three types of tools and their operation cycles in the example shown in FIG. The tool used first is “tool 01 (tool ID assigned to the center drill)”, and the operation cycle of the tool at this time is spot drilling (G81). The next tool to be used is “tool 02” (tool ID assigned to the 3.4 mm drill (short)), and the operation cycle of the tool at this time is deep drilling (G83). . The last tool to be used is “tool 03” (tool ID assigned to a 3.4 mm drill (long)), and the operation cycle of the tool at this time is a deep drilling process of a part that does not reach ( G83). As described above, when the machining ID is specified by the machining pattern table, the tool used corresponding to the machining ID and the operation cycle of each tool used can be determined as the machining pattern.

  Next, one tool is selected in the order of use of the tool specified in S150, and the effective length of the tool is checked for each selected tool to confirm whether it actually interferes with the workpiece. Performed (S160). This is done on the basis of a tool shape table showing tool shape data registered in advance in the computer as shown in FIG. In the tool shape table, shape information corresponding to each tool name code registered in the tool used shown in FIG. 3 is registered. The values indicated by the shape information shown in FIG. 5 are the tool diameter (D1s), the blade body diameter (D1e), the shank tip diameter (D2s), and the shank diameter (as shown in FIG. 6). D2e), blade length (L0), effective length (L1), protrusion amount (L2), blade taper angle (θ1), shank taper angle (θ2), and actual size of margin. In FIG. 5, the tool type code is a code indicating the tool type. Actually, referring to FIG. 6, the code “CDR” indicates that the tool type is a center drill, and the code “DR” indicates the tool type. Is shown to be a drill. In S160, first, the three-dimensional shape of the tool as shown in FIG. 6 is calculated from the various shape information of the tool shown in the tool shape table of FIG. Then, with the tool oriented in the machining direction specified in S120, the tip position of the tool is made to coincide with the machining end position calculated in S130. At this time, the contour of the three-dimensional shape of the tool is calculated in S130. It is determined whether or not there is a portion overlapping the workpiece at the machining start position. When the contour of the three-dimensional shape of the tool overlaps the workpiece, the selected tool is returned to the machining pattern determination step (S150) as being interfered with the workpiece.

When it is determined that the tool interferes and the process is returned from S160 to S150, a tool longer than the already selected tool is selected again based on the machining pattern table. Actually, as shown in FIG. 5, it is assumed that a plurality of tools are registered in advance. For example, the processing ID is “1000011040034” and the tool to be used is “tool 02” first selected. In some cases, “tool 03” of the tool next to (below) the selected tool is selected again as a tool longer than the selected tool, and two types of machining patterns that do not include the tool “tool 02” are selected. A machining pattern using only a tool can be obtained (see FIG. 3). In this respect, among the machining cycles constituting the machining pattern, in the machining cycles such as the spod-ring, the tapping cycle, and the boring cycle, it is not desirable to switch the tool from the function of the machining cycle. Therefore, for these machining cycles, as described above, it is desirable that the NC path is generated only by a tool having a long effective length selected later.
In addition, when a tool longer than the already selected tool is selected that is judged to interfere, machining is performed up to the point of interference using the already selected tool. It is good also as a processing pattern which processes using a long tool. In order to output the NC path of another tool to a region deeper than the point where the already selected tool interferes, instead of the fixed cycle as shown in FIG. Basic command to the processing machine for linearly moving the main spindle (for example, G00: basic command for moving the processing machine table or main spindle at the maximum speed. G01: specified in the line before this command in the NC path code) Basic command to move the machine table or the spindle at the cutting feed rate that is present) can be used. That is, for a long tool selected later, based on the above basic command, the point where the already selected tool interferes with the mold model is set as the cutting start position, and the tool spindle is moved quickly there. The NC path to be output may be output. By outputting such an NC path, it becomes possible to eliminate a useless path that follows the same trajectory a plurality of times, and in particular, similar to the high-speed deep drilling cycle (G73), the deep drilling cycle (G83), and the counterbore processing. This is an effective processing method for the cycle. In this way, for machining cycles where tool switching does not become a problem, such as high-speed deep drilling cycles, deep drilling cycles, and counterbore machining, it is possible to cut with a short tool first in consideration of the stability of the tool during cutting. It is desirable to process to a desired position, and then switch the tool to a longer tool and process to a desired position.
In view of the above circumstances, for machining cycles such as spod-rolling, tapping cycle, and boring cycle, an NC path based only on a tool having a long effective length selected later is generated, and a high-speed deep drilling cycle and a deep drilling cycle are generated. And for machining cycles such as counterbore, it is ideal to generate NC paths based on both the initially selected short tool and the subsequently selected long tool. Therefore, in the present invention, from the viewpoint of outputting a NC path without waste and maintaining stable cutting accuracy of the tool, it is preferable that the NC path output method described above can be selected based on the characteristics of the machining cycle. Composed.
As described above, when registering the tool to be used corresponding to the machining ID in the machining pattern table, a plurality of tools having different lengths are registered in the order of the tool length in consideration of the interference of the tool with the workpiece. It is desirable to keep it. Further, it is desirable that information indicating whether each machining cycle can be realized by using a plurality of tools is registered in the machining pattern table as a characteristic of each machining cycle.

  Next, an operation control parameter is determined for one tool used selected in S160 (S170). This is done based on a tool motion control table registered in advance in a computer as shown in FIG. In the tool motion control table, the information about the material used, the machine used for machining, the tool used, and the rotation speed, feed, pitch, and coolant information corresponding to the combination of motion cycles are used. It is registered in advance in the computer as a definition for controlling the operation of the computer. For example, referring to FIG. 7, when the workpiece material code is designated as “metalA”, the machine tool code as “machineA”, the tool code used as “tool 01”, and the operation cycle as “G83”, The operation control of the tool used corresponding to No. 2 is 2000 rotations per second, 100 feeds, 0.5 pitches. The coolant code is determined to be M8 and the holder code to be used is BB09. The material of the workpiece and the processing machine are determined from S120, and the tool used and the operation cycle are determined from S150.

  Next, a holder interference check is performed to check whether the holder specified for one tool selected in S160 actually interferes with the workpiece (S180). This is done based on a holder shape table registered in advance in a computer as shown in FIG. In the holder shape table, as shown in FIG. 9, as the shape information for each holder number, the holder type (A or B), the holder diameter (D3s), the tip angle (θ3), the holder body diameter (D3e) ), The root diameter of the holder (D4), the length of the holder (L3), the total length of the holder (L4), and the allowance are registered in advance. Here, it is assumed that the holder number is associated with one of the holder codes in FIG. In S170, first, the contour shape when this tool is mounted on the holder is calculated from the various shape information of the holder shown in FIG. 8 and the various shape information of the tool used in S170. Then, with the tool oriented in the machining direction specified in S120, the tip position of the tool is matched with the machining end position calculated in S130. At this time, the contour of the three-dimensional shape of the holder on which the tool is mounted It is determined whether or not the workpiece overlaps the workpiece. If there is a portion where the contour of the three-dimensional shape of the holder on which the tool is mounted overlaps the workpiece, the selected holder is returned to the machining pattern determination step (S150) as interfering with the workpiece. It is.

  When it is determined that the selected holder interferes with the workpiece and is returned from S180 to S150, the holder has a small outer diameter different from the holder already selected based on the tool operation control table. , Again select a holder to which the same tool can be mounted. As described above, in order to be able to select an alternative holder, the tool operation control table may include a plurality of holders corresponding to the material of the workpiece, the processing machine, the tool used, and the operation cycle. desirable. Even when the holder interferes with the workpiece, the interference of the holder may be eliminated by reselecting a long tool as in the case of S160.

  Next, NC data for one tool selected in S160 is generated (S190). The NC data is generated by the machining direction determined by S120, the machining start position and machining end position determined by S130, one tool used in S160 and its operation cycle, and various operations of the one tool used determined in S170. It is made based on the control parameter value and a processing machine definition table corresponding to the processing machine determined by S120. Here, the processing machine definition table is made up of codes as shown in FIG. 10, and defines various setting items unique to the processing machine to be used that are required when generating NC data. It will be readily understood by those skilled in the art of NC data design that NC data is generated as long as the above data is specified.

  Next, with respect to the NC data generated for one tool selected in S160, it is determined from the life of the one tool whether cutting is possible only with the one tool, and as a result of the determination, the same data is obtained. If a plurality of tools are required, the NC data generated in S190 is divided into data for each tool, and the timing for exchanging each tool can be transmitted to the processing machine (S200). This is done based on a tool life table as shown in FIG. In the tool life table of FIG. 11, it is assumed that the code of the tool used, the tool type code, and the life of the corresponding tool are registered in the computer in advance. The value registered as the tool life is, for example, a continuous use time or a total use time, but may be another index value. In the example shown in FIG. 11, the tool life is set to 60 minutes. In S200, when the machining time derived from the NC data corresponding to one selected tool is longer than 60 minutes, Need to be divided. The machining time can be calculated by adding the rapid feed movement time of the tool other than during cutting to the time obtained by dividing the tool path by the tool feed speed. As a method of dividing NC data, first, if the result of dividing the time required for machining by the life time is 1 or more, it is determined to use a plurality of the same tools. A part of NC data is assigned to each tool. The method of assigning a part of NC data to each tool may be divided into NC data so that the same machining time is assigned to each tool, or only for the time exceeding the tool life time. The NC data may be divided so as to use these tools. At this time, it is possible to eliminate a useless path by determining a machining start position corresponding to each of a plurality of used tools and outputting an NC path corresponding to each tool based on the basic command described above. It becomes.

  Steps S160 to S200 are performed for all tools required in the machining pattern determined in S150. That is, the process of sequentially selecting tools in S160 and generating NC data corresponding to the selected tools is repeated for the number of tools required in the machining pattern. By repeating this process, it is possible to automatically generate NC data corresponding to a machining pattern in which a plurality of tools are used for one hole.

  The steps from S100 to S200 are for generating NC data for one hole. By repeating this step for all the holes to be cut, the NC for all the holes to be cut is obtained. Data can be generated.

  Next, the usage order of each tool is determined based on the priority of tool usage (S210). This is done based on a processing priority table as shown in FIG. It is assumed that the tool priority code, the tool type code, and the corresponding priority order are registered in advance in the machining priority order table. In the example of FIG. 12, the priority orders “1” and “2” are assigned to the two tools belonging to the center drill system, and the priority orders “3” to “11” are assigned to the 11 tools belonging to the drill hole. 13 "is assigned. In this way, by setting priorities so that tools of the same type and shape are similar or similar, and tools that can be stored in the same tool mounting pod are used together in order, for example, the same pod If a processing machine in which the tools inside can be automatically replaced is used, it is possible to reduce the tool replacement time and the like. Further, NC data may be created so that holes that can be cut with each tool are cut together in consideration of the order of use of tools corresponding to the machining cycle. Thereby, when using the same tool with respect to a some hole, the frequency | count of replacement | exchange of a tool can be reduced by giving priority to the hole which can be cut with the same tool collectively.

  Next, the tool to be used, the holder to be used, and the tool mounting pod are instructed to the processor via the computer (S220). By S220, the operator actually confirms the tool to be used, the holder to be used, and the tool mounting pod in the processing machine to be used, and then transfers the NC data including the ATC schedule to the processing machine using the NC data. Is started (S230).

  As described above, according to the above flow, NC data for machining a hole shape using a plurality of tools can be automatically generated. In addition, by taking into consideration the shape of the tool and the shape of the holder, the priority of the tool to be used, and the life of the tool, it is possible to respond to irregular events that could not be handled in the past. It can be understood from the above flow.

  Here, a description will be given of an embodiment in which NC data is actually automatically generated for a hole shape of a mold by using the processing flow according to the present invention described so far.

  The system according to the present invention includes a general computer terminal such as a personal computer or a workstation and its peripheral devices, and a computer program executed on the computer. Since the computer peripheral device is a general-purpose device, the central part of this system is a part of software that generates NC data for a hole shape of a mold composed of a computer program.

  The NC data generation software for the hole shape of the mold according to the present embodiment is linked to the CAD system and the CAM system, and can access and control the CAD system and the CAM system. As the CAD system and the CAM system, a commercially available system widely used in this field can be used, or an independently developed or customized system can be used. It should be noted that the NC data generation software according to the present invention does not indicate that the NC data generation software according to the present invention can be operated only by a computer different from the CAD system and the computers constituting the CAM system. It may be included in a computer constituting the system or the CAM system and operated in a customized form so as to function as a part of the CAD system or the CAM system.

  FIGS. 13A and 13B show a state where the CAM system is activated and the mold model is displayed on the computer screen. FIG. 13A shows the result of displaying the mold model data 100 obtained by inverting the product data on the display connected to the CAM system in S110 described above. On the other hand, FIG. 13B similarly shows the result of displaying the mold hole shape data 200 obtained by inverting the product hole shape data on the display connected to the CAM system. The mold model data 100 is displayed based on the shape data of the workpiece associated with the mold coordinate axes of the CAM system described in S110. Similarly, the hole shape data 200 is the same as that of the CAM system. Displayed based on the function of the CAM system from the center position, hole diameter, and hole depth of the hole in the workpiece associated with the mold coordinate axis.

  FIG. 14 is a diagram in which the mold model data 100 is actually displayed on the computer screen using the NC data generation software according to the present invention. On the computer screen, the position of the hole shape data shown in FIG. 13B is superimposed on the mold model data shown in FIG.

  FIG. 15 is an enlarged view of the hole shape 300 and its peripheral region included in the mold model of FIG. 14 and also displays “hole attribute” information for the hole shape 300. Here, the “hole attribute” information is information including a machining ID and various data included therein, as well as a machining start position and a machining end position determined by S130. In the example of FIG. 15, in addition to the machining ID for one hole shape 300 selected in S160 and various data included therein, the machining start position and the machining end position in the mold model of the hole shape 300 are displayed. I understand that. The “hole attribute” information shown in FIG. 15 is displayed in a state where the above-described processing flow has been advanced to S140.

  FIG. 16 shows the machining locus of the tool for NC data generated based on the above processing flow. FIG. 17 is an enlarged view of a part of FIG. Referring to FIG. 17, the state of the machining locus of the tool for each hole can be understood. As shown in FIG. 18, the state of the tool interference check and the holder interference check performed in S160 and S180, respectively, may be displayed.

  FIGS. 19a to 19h show how a new tool is selected on the computer screen when checking the effective length of the tool using the NC data generation software according to the present invention. FIGS. 19a and 19b are perspective views and sectional views showing the state when the tool 400 determined in S150 is positioned in the vicinity of the opening of the hole, respectively. FIGS. 19c and 19d are perspective views and cross-sectional views, respectively, illustrating a case where it is determined that the tool 400 is short and interferes with the workpiece according to S160. FIG. 19e and FIG. 19f show the state after switching to the tool 500 having a long effective length, using a perspective view and a cross-sectional view, respectively. In this figure, the start position of the NC path of the switched tool 500 having a long effective length is the tip position of the tool 400 at the time of interference in FIGS. 19c and 19d. The designation of the start position of the NC path can be performed based on the basic command of the processing machine described above. FIG. 19g and FIG. 19h show the state when the tool 500 having a long effective length reaches the depth of the hole given in the specification, using a perspective view and a sectional view, respectively. In this way, by registering the same type of tools (for example, 400, 500) having different effective lengths on the computer in advance, even when the effective length of the tools is short, the workpiece is automatically interfered. Thus, the NC path can be output.

  20a to 20c show how the NC path is output on the computer screen when it is determined from the tool life that a plurality of identical tools are necessary according to S200. Here, an example will be shown when it is determined that two identical tools are necessary from the tool life according to S200. First, FIG. 20a shows a state where a hole 600 to be processed is selected on a computer screen. When the hole to be machined is determined, the time required for machining is calculated from the machining conditions and the machining distance according to S200, and the required tool is compared with the life time set in advance for each tool. Is determined (here, two). FIG. 20b shows the movement of the first tool. A broken line 700 shows a path for actually cutting a hole, and a solid line 700 shows a path when moving from one hole to another. ing. FIG. 20c shows the movement of the second tool. A broken line 800 indicates a path for actually cutting a hole, and a solid line 800 indicates a path when moving from one hole to another. ing. The NC path start position of the second tool is specified based on the basic command G00 of the processing machine described above.

  As described above, the embodiment and examples of the present invention have been described. However, the present invention is not limited to the above-described examples, and various modifications can be added thereto. Easy to understand. In addition, as long as they are within the scope of matters described in the respective claims and equivalent matters, they are naturally included in the technical scope of the present invention. The above example relates to a method and system for generating NC data for a hole shape using a predetermined table or the like, but this is only an example, and the present invention is limited to this specific example. Is not to be done.

It is the figure which showed the whole flow which produces | generates NC path | pass corresponding to the hole shape of the metal mold | die which concerns on one Embodiment of this invention. It is the figure which showed an example of the RGB table in which the RGB value and the shape characteristic information of various holes corresponding to this are registered. It is the figure which showed an example of the process pattern table in which the operation cycle for every use tool and the use tool was registered as a process pattern corresponding to process ID. It is the figure which showed the mode of cutting concrete about the operation | movement cycle shown by FIG. It is the figure which showed an example of the tool shape table which registered the shape data of the tool. It is the figure which showed the shape of the tool registered in FIG. It is the figure which showed the tool operation | movement control table which defined how operation | movement of a use tool is controlled with respect to the combination of the material of a workpiece, a processing machine, a use tool, and an operation cycle. It is the figure which showed an example of the holder shape table which registered the shape data of the holder. It is the figure which showed the shape of the holder registered into FIG. It is the figure which showed an example of the processing machine definition table. It is the figure which showed an example of the tool life table in which the code | cord | chord of a tool to be used, a tool classification code, and the lifetime of a corresponding tool are registered. It is the figure which showed an example of the process priority table where the code | cord | chord of the tool used, the tool classification code, and the corresponding priority are registered. It is the figure which showed the state which started the CAM system and displayed the mold model on the computer screen. It is the figure which showed a mode that the metal mold | die model was displayed on the computer screen using NC data generation software which concerns on this invention. FIG. 15 is a diagram in which a hole shape and its peripheral region included in the mold model of FIG. 14 are enlarged and displayed, and “hole attribute” information for the hole shape is displayed. It is the figure which showed the processing locus of the tool about NC data generated based on the processing flow concerning one embodiment of the present invention. It is the figure which expanded and displayed a part of FIG. It is the figure which displayed the mode of the interference check of a holder. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when selecting a new tool at the time of the check of the effective length of a tool. It is the figure which showed the Example when dividing | segmenting NC path | pass according to the lifetime of a tool. It is the figure which showed the Example when dividing | segmenting NC path | pass according to the lifetime of a tool. It is the figure which showed the Example when dividing | segmenting NC path | pass according to the lifetime of a tool.

Explanation of symbols

100 Mold model data 200 Hole shape data 300 One selected hole shape 400 Tool having a short effective length 500 Tool having a long effective length 600 Hole 700 to be machined First tool trajectory 800 Second tool trajectory

Claims (8)

Using a computer that defines and stores a shape characteristic of a hole to be an NC path generation and a predetermined table for identifying the tool used and the NC path based on the shape characteristic of the hole, A system that automatically generates an NC path for a hole shape of a mold,
The shape characteristic of the hole that is the target for generating the NC path is:
Hole type, hole end characteristics indicating whether it is a through hole or a retaining hole, presence or absence of entrance chamfering, entrance chamfer size, processing direction, processing machine used, workpiece material, gold for hole processing The center position of the hole on the surface of the mold model, the diameter of the hole, and the depth of the hole are defined and stored on the computer as each element,
The predetermined table includes a machining pattern table and a tool operation control table,
The machining pattern table includes a tool to be used, a machining cycle instructing an operation unit of the tool to be used, and a machining pattern instructing a type of machining specified by a combination of each element of the shape characteristic of the hole. A pattern is associated to identify the tool used and the machining cycle of the tool used;
The tool operation control table associates the workpiece material, the used machine, the used tool, the machining cycle, and the numerical value of the control parameter that controls the operation of the tool,
The system
A processing distance for specifying a cutting range in the depth direction of the hole based on the center position of the hole and the depth of the hole stored in the computer, and calculating a processing start position and a processing end position in the mold model A calculation means;
A machining pattern is specified by a combination of the diameter of the hole, the type of the hole, the hole end characteristic, the presence / absence of the entrance chamfer, and the size of the entrance chamfer stored in the computer, and the machining pattern Machining pattern determination means for determining at least one tool used corresponding to the machining pattern and a machining cycle corresponding to the tool used based on the table;
Operation control parameters of the used tool corresponding to the workpiece material and the used processing machine stored in the computer, the used tool determined by the processing pattern determining means, and the processing cycle of the used tool Use tool motion control parameter value determining means for determining a value based on the tool motion control table;
NC path output means for outputting an NC path based on the machining direction, the machining start position, the machining end position, the used tool, the machining cycle, the machining pattern, and a control parameter value of the used tool. A system characterized by that. The diameter of the hole and the depth of the hole stored in the computer;
Based on the tool shape table defined and stored in the computer, with the shape data of each tool used as an element,
It is determined whether or not the tool used determined by the machining pattern determining means interferes with the mold model at the time of machining, and if it interferes with the mold model, it is already determined based on the machining pattern determining means. The system according to claim 1, further comprising a tool effective length check means for re-determining a tool longer than the used tool as a new tool. The diameter of the hole and the depth of the hole stored in the computer;
Based on the tool shape table defined and stored in the computer, with the shape data of each tool used as an element,
It is determined whether or not the tool used determined by the machining pattern determining means interferes with the mold model at the time of machining, and if it interferes with the mold model, it is already determined based on the machining pattern determining means. A tool effective length check means for further determining a used tool longer than the determined used tool in addition to the determined used tool;
In the NC path output means,
The NC path for the long tool used when the long tool used is further determined by the tool effective length check means is based on a command for controlling the movement of the processing machine table supporting the die model and the spindle supporting the tool. The system according to claim 1, wherein the system is output only for a region in which cutting is impossible because the previously selected tool interferes with the mold model. The tool operation control table further associates a workpiece material, a used processing machine, a used tool, a processing cycle, and a use holder specified from a combination thereof,
The used tool operation control parameter value determining means further includes the work material defined and stored in the computer, the used processing machine, the used tool, the processing cycle, and the tool operation control table. Determine the holder to use based on
Further, when the shape of the mold model to be drilled is defined and stored in the computer, the shape of the mold model,
A central position of the hole stored in the computer;
Based on the holder shape table defined and stored in the computer, with the shape data of each holder used as an element,
It is determined whether or not the use holder determined by the tool motion control parameter value determining means interferes with the mold model at the time of machining. When the tool holder interferes with the mold model, the use tool motion control parameter value is determined. The holder interference checking means for selecting again a holder having a smaller outer diameter than the holder already determined based on the determining means and capable of mounting the tool to be used. System. Furthermore, on the computer, a life time is defined and stored for each tool used as a preset tool usable time,
When the lifetime is compared with the NC path output by the NC path output means and the time required for processing specified by the processing machine used, the time required for the processing is longer than the lifetime for the tool used A plurality of used tool determining means for specifying a plurality of used tools required by dividing the time required for the machining by the lifetime.
When a plurality of tools used are specified by the plurality of tools used determining means, each of the plurality of tools used is determined based on a command for controlling the movement of the processing machine table that supports the mold model and the spindle that supports the tools. The system according to claim 1, further comprising an NC path re-output unit that determines a machining start position corresponding to the above and outputs the NC path again.   Further, a plurality of used tools and a processing priority order table having elements of the priority of use of each of the plurality of used tools as elements, and processing patterns of all holes to be cut, which are defined and stored on the computer. The tool according to any one of the preceding claims, further comprising a multiple-use tool order determining means for determining the order in which the tools are used from each corresponding tool used and the tool use order corresponding to the machining cycle. The system described in one. Using a computer that defines and stores a shape characteristic of a hole to be an NC path generation and a predetermined table for identifying the tool used and the NC path based on the shape characteristic of the hole, A system that automatically generates an NC path for a hole shape of a mold,
The shape characteristic of the hole that is the target for generating the NC path is:
Hole type, hole end characteristics indicating whether it is a through hole or a retaining hole, presence or absence of entrance chamfering, entrance chamfer size, processing direction, processing machine used, workpiece material, gold for hole processing The center position of the hole on the surface of the mold model, the diameter of the hole, the depth of the hole, and the shape of the mold model to be drilled are defined and stored on the computer as elements,
The predetermined table includes a machining pattern table, a tool shape table, a tool motion control table, and a holder shape table,
The machining pattern table includes a tool to be used, a machining cycle instructing an operation unit of the tool to be used, and a machining pattern instructing a type of machining specified by a combination of each element of the shape characteristic of the hole. A pattern is associated to identify the tool used and the machining cycle of the tool used;
The tool shape table has each shape data of the tool used as each element,
The tool operation control table associates a workpiece material, a used machine, a used tool, a machining cycle, a numerical value of a tool control parameter, and a used holder.
The holder shape table uses each shape data of the holder used as an element,
The system
A processing distance for specifying a cutting range in the depth direction of the hole based on the center position of the hole and the depth of the hole stored in the computer, and calculating a processing start position and a processing end position in the mold model A calculation means;
A machining pattern is specified by a combination of the diameter of the hole, the type of the hole, the hole end characteristic, the presence / absence of the entrance chamfer, and the size of the entrance chamfer stored in the computer, and the machining pattern Machining pattern determination means for determining at least one tool used corresponding to the machining pattern and a machining cycle corresponding to the tool used based on the table;
Based on the diameter of the hole and the depth of the hole stored on the computer and a tool shape table in which the shape data of each tool used is defined and stored on the computer, the machining pattern determination means determines the hole. In addition, it is determined whether or not the tool used interferes with the mold model. When the tool interferes with the mold model, a tool longer than the tool already determined based on the machining pattern determination means is newly added. Tool effective length check means to determine again as a tool to be used,
The operation control parameter value of the used tool corresponding to the workpiece material and the used processing machine, the used tool, the processing cycle of the used tool, and the used holder stored in the computer, Use tool motion control parameter value determining means for determining based on the tool motion control table;
Based on the shape of the mold model, the center position of the hole stored on the computer, and the holder shape table, the use holder determined by the tool operation control parameter value determining means is the It is determined whether or not it interferes with the mold model, and when it interferes with the mold model, the outer diameter is smaller than the holder already determined based on the used tool operation control parameter value determining means and the used tool is mounted. Holder interference check means to re-select possible holders,
NC path output means for outputting an NC path based on the machining direction, the machining start position, the machining end position, the used tool, the machining cycle, the machining pattern, and a control parameter value of the used tool. A system characterized by that. Using a computer that defines and stores a shape characteristic of a hole to be an NC path generation and a predetermined table for identifying the tool used and the NC path based on the shape characteristic of the hole, A system that automatically generates an NC path for a hole shape of a mold,
The shape characteristic of the hole that is the target for generating the NC path is:
Hole type, hole end characteristics indicating whether it is a through hole or a retaining hole, presence or absence of entrance chamfering, entrance chamfer size, processing direction, processing machine used, workpiece material, gold for hole processing The center position of the hole on the surface of the mold model, the diameter of the hole, the depth of the hole, and the shape of the mold model to be drilled are defined and stored on the computer as elements,
The predetermined table includes a machining pattern table, a tool shape table, a tool motion control table, and a holder shape table,
The machining pattern table includes a tool to be used, a machining cycle instructing an operation unit of the tool to be used, and a machining pattern instructing a type of machining specified by a combination of each element of the shape characteristic of the hole. A pattern is associated to identify the tool used and the machining cycle of the tool used;
The tool shape table has each shape data of the tool used as each element,
The tool operation control table associates a workpiece material, a used machine, a used tool, a machining cycle, a numerical value of a tool control parameter, and a used holder.
The holder shape table uses each shape data of the holder used as an element,
The system
A processing distance for specifying a cutting range in the depth direction of the hole based on the center position of the hole and the depth of the hole stored in the computer, and calculating a processing start position and a processing end position in the mold model A calculation means;
A machining pattern is specified by a combination of the diameter of the hole, the type of the hole, the hole end characteristic, the presence / absence of the entrance chamfer, and the size of the entrance chamfer stored in the computer, and the machining pattern Machining pattern determination means for determining at least one tool used corresponding to the machining pattern and a machining cycle corresponding to the tool used based on the table;
Based on the diameter of the hole and the depth of the hole stored in the computer, and a tool shape table defined and stored in the computer having shape data of each tool used as an element, the machining pattern determination means It is determined whether the tool used determined by the above-mentioned tool interferes with the mold model at the time of processing. When the tool used interferes with the mold model, the tool used is already determined based on the processing pattern determining means. First tool effective length check means for re-determining a long tool as a new tool to be used;
It is determined whether or not the tool used determined by the processing pattern determining means interferes with the mold model during processing, and when it interferes with the mold model, it is already determined based on the processing pattern determining means. Second tool effective length check means for further determining a tool used longer than the determined tool used in addition to the determined tool used;
Selection means for selecting one of the first tool effective length check means and the second tool effective length check means based on the characteristics of each machining cycle stored in the computer;
The operation control parameter value of the used tool corresponding to the workpiece material and the used processing machine, the used tool, the processing cycle of the used tool, and the used holder stored in the computer, Use tool motion control parameter value determining means for determining based on the tool motion control table;
Based on the shape of the mold model, the center position of the hole stored on the computer, and the holder shape table, the use holder determined by the tool operation control parameter value determining means is the It is determined whether or not it interferes with the mold model, and when it interferes with the mold model, the outer diameter is smaller than the holder already determined based on the used tool operation control parameter value determining means and the used tool is mounted. Holder interference check means to re-select possible holders,
NC path output means for outputting an NC path based on the machining direction, the machining start position, the machining end position, the used tool, the machining cycle, the machining pattern, and a control parameter value of the used tool,
In the NC path output means,
The NC path for the long tool used when the second tool effective length check means is further determined by the second tool effective length check means is a command for controlling the movement of the processing machine table supporting the mold model and the spindle supporting the tool. Based on the above, the system is characterized in that it is output only for the region where cutting is impossible because the previously selected tool interferes with the mold model.