JP2017217735A - Process design supporting system and process design supporting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide in a small amount of time, multiple divided and removed areas and a processing order thereof, used for designing processing steps.SOLUTION: A process design supporting system 100 supports designing processing steps for obtaining an object 202 in a predetermined shape by removing a part of a raw material 200. The process design supporting system 100 comprises: an inquiry part 101 for dividing a whole removal area 201 by tentative planes including plane parts on a surface of the whole removal area 201, which is a part of an area to be removed acquired from raw material data and object data, to acquire a number of divisions for each of multiple tentative planes, and a division plane determination part 102 for determining one of the multiple tentative planes with the number of divisions becoming equal to or more than three, to be a division plane to divide the whole removal area 201.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a process design support system and a process design support method for supporting design of a machining process for obtaining a target object having a predetermined shape by removing a part of a material by cutting or the like.

  With rapid changes in customer requirements and diversification of market needs, production forms are shifting to high-mix low-volume production. In multi-product small-quantity production, product shapes are diversified and complicated, and there is a problem that processing preparation time for determining the processing order is increased in the machining field. Therefore, in order to shorten the processing preparation time, the CAD system and the CAM system are used in the field of machining, but the user is required to perform enormous operations such as the determination of the processing location and processing sequence. This hinders efficiency.

  Therefore, in Patent Document 1, the area is temporarily divided by all the planes including the plane portion of the surface of the area to be removed by processing, and the divided areas are reconfigured by a combination of a plurality of types and reconfigured. A technique for generating a plurality of machining process candidates by defining the machining order and machining conditions of the regions is described.

JP 2005-309713 A

  However, in the conventional method, since the area to be removed is once subdivided (minimized) and reconstructed, the number of cases is enormous and it is enormous until a suitable solution is presented. There is a problem that it takes a lot of time and it is difficult to select an optimal solution even if the presented result is seen.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a process design support system and a process design support method that can divide a region to be removed into regions suitable for processing without being subdivided. And

  In order to achieve the above object, a process design support system according to the present invention is a process design support system that supports design of a machining process for removing a part of a material and obtaining an object having a predetermined shape. The number of divisions, which is the number of provisional areas obtained by dividing the total removal area by a provisional plane including the flat portion of the surface of the total removal area, which is a lump area to be removed, obtained based on the material data and the object data An inquiry unit for acquiring a plurality of provisional planes, and a division plane determination unit for determining one of the provisional planes having the division number of 3 or more as a division plane for dividing the total removal region. .

  In addition, one of the plurality of division removal areas divided by the division plane determined by the division plane determination unit is determined as the next total removal area, except for one division removal area that satisfies a predetermined condition. A further total removal area determining unit that performs the inquiry, and the inquiry unit is obtained by dividing the total removal area by a provisional plane including a plane portion of the surface of the total removal area determined by the next total removal area determination unit. The number of divisions, which is the number of provisional areas, may be acquired for a plurality of provisional planes, and the division plane determination unit may determine one of the provisional planes having the division number of 3 or more as the next division plane.

  The division plane determination unit may determine a provisional plane having the maximum number of divisions as a division plane.

  The division plane determination unit may further determine all provisional planes as division planes when the number of divisions obtained by dividing the total removal region by provisional planes is all two.

  Further, for the divided removal area divided by the division plane determined by the division plane determination unit, the number of open surface portions is acquired, the area having the largest number of open surface portions is determined as the removal area, and the determined removal area A processing order determination unit that obtains the number of open surface portions for the remaining divided removal regions from which the removal has been performed, determines the region having the largest number of open surface portions as the next removal region, and sets the order of the determined removal regions as the processing order May be further provided.

  Moreover, you may further provide the order adjustment part which replaces the process order determined based on the process constraint conditions about the said division | segmentation removal area | region.

  In order to achieve the above object, the process design support method according to the present invention is a process design support method for supporting the design of a machining process for obtaining an object having a predetermined shape by removing a part of a material. The number of provisional areas obtained by dividing the total removal area by a provisional plane including a plane portion of the surface of the total removal area, which is a lump area to be removed, obtained based on the material data and the object data. The number of divisions is inquired for each of a plurality of provisional planes, and one of the provisional planes having the number of divisions of 3 or more is determined as a division plane that divides the total removal area.

  Note that the execution of the program for causing the computer to execute each process included in the process design support system also corresponds to the implementation of the present invention. Of course, implementing the recording medium in which the program is recorded also corresponds to the implementation of the present invention.

  According to the present invention, it is possible to easily determine a division plane suitable for processing without subdividing the total removal region to be removed from the material by cutting or the like. Furthermore, it is possible to present a suitable processing order for the division removal area divided by the division plane. Therefore, it is possible to present the machining process from the material to the shape of the object, and to support the design of the machining process.

FIG. 1 is a block diagram showing a functional configuration of the process design support system. FIG. 2 is a perspective view showing a material, an object, and a total removal region. FIG. 3 is a flowchart showing a process flow of the process design support system. FIG. 4 is a perspective view showing a state in which the total removal region is divided by one temporary plane. FIG. 5 is a perspective view showing a state in which the total removal region is divided by another temporary plane. FIG. 6 is a perspective view showing the total removal region divided by the division plane in a discrete manner. FIG. 7 is a perspective view showing the number of open surface portions in each of the divided removal regions. FIG. 8 is a diagram illustrating a pattern of the processing order of the division removal area after the first division plane is determined. FIG. 9 is a perspective view showing the number of open surface portions of a microfabricated region included in SRV2. FIG. 10 is a diagram showing a processing order pattern of a micro-processed region in SRV2. FIG. 11 is a perspective view showing the number of open surface portions of the microfabricated region included in the SRV 4. FIG. 12 is a diagram showing a pattern of the processing order of the micro-processed region in SRV4. FIG. 13 is a diagram illustrating an example of the processing order of the divided removal regions (micromachining regions) in the total removal region acquired first. FIG. 14 is a perspective view showing a case where the provisional plane includes a slope.

  Next, an embodiment of a process design support system and a process design support method according to the present invention will be described with reference to the drawings. The following embodiments are merely examples of a process design support system and a process design support method according to the present invention. Accordingly, the scope of the present invention is defined by the wording of the claims with reference to the following embodiments, and is not limited to the following embodiments. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are not necessarily required to achieve the object of the present invention. It will be described as constituting a preferred form.

  Also, the drawings are schematic diagrams in which emphasis, omission, and ratio adjustment are performed as appropriate to show the present invention, and may differ from actual shapes, positional relationships, and ratios.

  FIG. 1 is a block diagram showing a functional configuration of the process design support system.

  FIG. 2 is a perspective view showing a material, an object, and a total removal region.

  As shown in these drawings, the process design support system 100 according to the present embodiment removes a part of the material 200 that is a material to be cut made of metal, resin, or the like to obtain an object having a predetermined shape. This is a system that supports the design of a cutting process, and is realized by causing a computer to execute software (program). The process design support system 100 includes an inquiry unit 101, a divided plane determination unit 102, a next total removal area determination unit 103, a processing order determination unit 104, and an order adjustment unit 105 as functional units realized by a computer. I have. The computer is an electronic computer that includes a CPU (central processing unit) and has general configurations such as input / output means such as a display device and an input device, and storage means such as a memory and an external storage device.

  The inquiry unit 101 is cut out from the material 200 and the material data indicating the three-dimensional shape of the material 200 on a computer that implements the process design support system 100 or so-called CAD software 300 that is executed on another computer. It is a processing part which provides the target object data which shows the three-dimensional shape of the target object 202 to be displayed. Further, the inquiry unit 101 determines a plane part existing on the surface of the virtual total removal region 201 that is a lump three-dimensional region to be removed from the material 200 by cutting based on the material data and the object data. It is a processing unit that acquires or obtains the number of divisions, which is the number of provisional areas obtained by dividing the total removal area 201 by one provisional plane including a plane part, for each provisional plane.

  Here, the extraction of the total removal area 201 is performed by a three-dimensional shape difference calculation using the material data and the object data. Further, the provisional plane includes not only a plane perpendicular to the XYZ axis in the drawing but also a plane arranged obliquely with respect to these planes. Moreover, the XYZ axes in the drawing may coincide with the axes of the processing machine.

  The inquiry unit 101 only needs to acquire the provisional plane and the number of divisions associated therewith in the total removal area 201 by specifying the material data and the object data, and the process design support system 100 can acquire the material. It is not always necessary to have data and object data. On the other hand, there is no denying that the inquiry unit 101 extracts the total removal area 201 based on the material data and the object data, specifies the plane part, and calculates the division number.

  The division plane determination unit 102 is a processing unit that determines a provisional plane having a division number of 3 or more as a division plane that divides the total removal region 201 based on the provisional plane acquired by the inquiry unit 101 and the number of divisions. In addition, when there are a plurality of provisional planes with the number of divisions of 3 or more, each may be determined as a division plane, the following processing may be performed for each division plane, and a plurality of patterns may be presented. The provisional plane having the largest number of divisions may be used as the division plane.

  Here, when the maximum number of divisions is 2, that is, when the total number of divisions obtained by dividing the total removal region 201 by the provisional plane is 2, all the division plane determination units 102 determine all the provisional divisions. The plane is determined as the split plane.

  The next total removal area determination unit 103 sets a predetermined condition among a plurality of division removal areas (hereinafter, abbreviated as SRV) divided by the division plane determined by the division plane determination unit 102. This is a processing unit that determines one of the areas other than one satisfied divided removal area as the next total removal area 201.

  Here, the predetermined condition is, for example, (1) closest to the cutting tool. (2) The open face part (Open Face) which is a surface which contacts air | atmosphere is the most. (3) The volume is the largest.

  The next total removal area determination unit 103 does not function when the division plane determination unit 102 determines that the maximum number of divisions is two.

  In the case of this embodiment, when the total removal area 201 is determined by the next total removal area determination section 103, the inquiry unit 101 sets the number of divisions to the CAD software 300 for all temporary planes of the new total removal area 201. Inquire. Also, the divided plane determination unit 102 determines a provisional plane whose number of divisions obtained by the inquiry unit 101 is 3 or more (for example, the maximum) as the next divided plane.

  The processing order determination unit 104 acquires the number of open surface portions that are surfaces that come into contact with the atmosphere with respect to the division removal region divided by the division plane determined by the division plane determination unit 102. Then, the region having the largest number of open surface portions is determined as a removal region, and the number of open surface portions is further acquired for the remaining divided removal regions obtained by virtually removing the determined removal region, and the number of open surface portions is the largest. The processing unit determines an area as the next removal area and uses the determined order of the removal areas as a processing order.

  With the above processing, the division removal region with the largest open surface portion is a region where the cutting tool can be easily approached in the actual cutting process and the restrictions on the usable tools are relaxed. It becomes a high area.

  Here, the open surface portion is generally described as a surface in contact with the atmosphere. The number of open surface portions may not be the exact number of planes. For example, as shown in FIG. 7, in SRV1, when viewed from above (when viewed in the negative direction of the Z axis in the figure), four planes are observed, but SRV1 is each of the X axis, the Y axis, and the Z axis. If it is covered with a virtual rectangular parallelepiped formed by a plane intersecting at right angles to the four planes, the four planes viewed from above are covered with one plane, so the number of open surface portions of the part may be considered as one. According to this concept, the number of open surface portions of the entire SRV 1 is 5. Therefore, regarding the number of open surface portions, a surface substantially in contact with the atmosphere may be considered as the number of open surface portions. Further, in consideration of the characteristics of the processing machine, the number of open surface portions may be determined by an approximate surface on which the cutting tool can enter. Specifically, the surface of the virtual rectangular parallelepiped where the material is held (chucked) may be not included in the open surface portion even if it is in contact with the atmosphere.

  The number of open surface portions may be obtained by calculation by the processing order determination unit 104 or may be obtained by inquiring the CAD software 300.

  The order adjustment unit 105 is a processing unit that acquires the processing constraint condition for the division removal region and replaces the processing order determined by the processing order determination unit 104 based on the processing constraint condition.

  Here, as shown in FIG. 2, the processing constraint condition means that when a coaxial through hole is provided in two regions of the object 202, the through hole is removed before removing the divided removal region sandwiched between the two regions. An example of the condition of drilling a hole is illustrated. In this case, since the region where the through hole is provided is not a region surrounded by a plane, it is not specified by the divided plane determination unit 102. Therefore, the order adjustment unit 105 may acquire in advance a processing target region that is not specified by the division plane determination unit 102 and may additionally insert the region to be processed at an appropriate position in the processing order.

  As other processing conditions, the division removal area to be removed using the same cutting tool makes the machining order continuous, the division removal area having the same required dimensional tolerance makes the machining order continuous, the required perpendicularity, parallelism, When the flatness or the like is severer than a predetermined threshold, the processing order of the divided removal areas is adjusted. Furthermore, the order adjustment unit 105 may add the following processing constraint condition. For example, machining is performed from the divided removal area on the side close to the cutting tool, and machining is performed from the divided removal area having a large volume.

  In the case of this embodiment, the process design support system 100 presents a result of visually displaying on a display or the like the processing order of the division plane determined by the division plane determination unit 102 and the division removal area divided by the division plane. Part 106 is provided. As a result, the operator can visually perceive the division / removal area to be removed and the processing order of the division / removal area, and the machining process can be determined. The result obtained by the result presentation unit 106 is sent to the CAM system 301 and executed.

  Next, a flow for determining the division plane and the processing order by causing each processing unit of the process design support system 100 to function will be described.

  FIG. 3 is a flowchart showing a process flow of the process design support system.

  First, the inquiry unit 101 presents material data and object data to the CAD software 300, and obtains a batch of total removal areas 201 from the CAD software 300 (S101). The total removal area 201 is data similar to the material data and the object data. Also, depending on the material data and the object data, there may be a case where there are a plurality of total removal areas 201. In this case, the following processing may be performed for each total removal area 201.

  Next, the inquiry unit 101 extracts a provisional plane including a plane part existing on the surface of the acquired total removal area 201, and the number of divisions obtained when the total removal area 201 is divided by the provisional plane is calculated by CAD software. Inquire 300 and obtain the result (S102). This process is performed for all the provisional planes including the slopes existing on the surface of the total removal region 201.

  Specifically, for example, when the total removal area 201 is divided on the provisional plane 203 as shown in FIG. 4, the number of divisions is 4, as indicated by a, b, c, and d. On the other hand, when the total removal area 201 is divided on the provisional plane 203 as shown in FIG. 5, the number of divisions is 2, as shown by a and b.

  Next, the divided plane determining unit 102 extracts, for example, a temporary plane associated with the maximum number of divisions, and determines the temporary plane as a divided plane (S103). In the case of the present embodiment, the number of divisions based on the provisional plane 203 shown in FIG. 4 is four, which is the largest, so this provisional plane 203 is determined as the division plane. When the total removal area 201 divided by the determined division plane is disassembled and shown, a state as shown in FIG. 6 is obtained.

  In addition, when the acquired maximum number of divisions is 2, the division plane determination unit 102 determines all provisional planes as division planes.

  As described above, in this embodiment, it is possible to easily determine the division plane without subdividing the entire total removal area 201 acquired first with all the temporary planes.

  If the maximum number of divisions is 3 or more and there are provisional planes with the same number of divisions, the following processing may be performed for each division plane, and the following processing is performed using the provisional plane acquired last as the division plane: May be performed.

  Next, the next total removal area determination unit 103 determines one of the areas other than the division removal area having the largest number of open surface portions for the division removal areas a, b, c, and d shown in FIG. (S104). Specifically, the number of open surface portions of the divided removal region a is 5, the number of open surface portions of the divided removal region b is 4, the number of open surface portions of the divided removal region c is 2, and the number of open surface portions of the divided removal region d is Therefore, a region other than the division removal region a, for example, the division removal region b is determined as the next total removal region 201 (S104).

  The above processing is repeated until all the divided planes are determined (S105). In the case of the present embodiment, as shown in FIG. 7, when the total removal region 201 is cut along the initially determined division plane (the provisional plane 203 shown in FIG. 4), it is divided into four regions SRV1 to SRV4. Since any number of SRV2 to SRV4 is divided by any provisional plane, the number of divisions is 2 (the maximum number of division planes is 2), so any provisional plane is determined as a division plane. . As described above, when the divided planes are determined for all of the total removal areas 201 acquired first, the divided plane determination process ends. Here, an area divided by the division plane determined when the maximum number of division planes is two is referred to as a microfabrication area (Primitive), and may be abbreviated as P.

  Next, the processing order determination unit 104 acquires the number of open surface portions that are surfaces that come into contact with the atmosphere for the divided removal regions divided by the division plane determined by the division plane determination unit 102, and obtains the largest number of open surface portions. A large area is determined as a removal area (S106).

  Specifically, as shown in FIG. 7, the number of open surface portions of SRV <b> 1 to SRV <b> 4 that are regions divided by the division plane determined first is calculated. In the case of this embodiment, since the number of open surface portions of SRV1 is as large as five, the priority of the processing order is the highest. That is, SRV1 is processed first.

  Next, since the number of open surface portions of SRV2 and SRV4 is four and the same, the processing order is divided into two cases as shown in FIG.

  Next, how to determine the processing order of SRV2 will be shown. As shown in the upper part of FIG. 9, the SRV 2 is divided into microfabricated regions P. The numbers of the open surface portions of P1 to P3 are indicated by numbers in parentheses in FIG. 9 (hereinafter, when the number of open surface portions is described, it is similarly described in the drawing). As shown in the figure, since the number of open surface portions of P1 is the largest, the processing order of P1 has the highest priority. In order to determine the next processing order, as shown in the lower part of FIG. 9, it is assumed that P1 has been processed and removed, and the number of open surface portions of P2 and P3 after processing is acquired. In this case, the number of open surface portions of P2 is the same as the number of open surface portions of P3, and the processing order in SRV2 is divided into two cases as shown in FIG.

  SRV3 has one microfabricated region and remains as it is.

  As shown in FIG. 11, the SRV4 is divided into P5 to P10 as a microfabrication region. When the processing order of the micro-processed regions is determined in the descending order of the number of open surface portions as in SRV2, the result is shown in FIG. A case of a plurality of processing orders is calculated.

  As described above, the processing order from SRV1 to SRV4 in the total removal region 201 is introduced into the processing order shown in FIG. 8 and the SRV2 processing order shown in FIG. 10 and the SRV4 processing order shown in FIG. There are a plurality of processing orders obtained by this, and these can be selected.

  There are various methods for selecting which processing order to select from a plurality of cases, but here, the processing order may be determined by performing a simulation related to the processing time and the number of tool replacements. May be displayed.

  An operator who operates the processing machine or the like can select a processing order suitable for processing based on the result presented by the result presentation unit 106. For example, an operator who wants to select the shortest processing time can select a processing order in which the processing time indicated by the result presentation unit 106 is the shortest. Similarly, an operator who wants to minimize the number of tool replacements can select a processing sequence suitable for the operator. If it is desired to select desired conditions for both, the processing order of the desired conditions can be selected.

  Next, the order adjustment unit 105 determines whether or not the processing restriction condition is included in the division removal area for which the processing order is determined (S108). If the processing restriction condition is included, the order is adjusted. (S109).

  As shown in FIG. 13, when the processing order is determined, the region corresponding to the fifth processing order is subjected to coaxial drilling on both sides of the region as shown in FIG. Therefore, the processing order may be adjusted to be last. That is, when it seems that it is more appropriate to change the order in the processing constraint conditions, the order is prepared.

  As described above, the processing order of the divided removal areas is determined.

  When the division removal area and the processing order thereof are determined, a tool path may be generated by selecting a tool that can be used for each division removal area based on the tool list.

  According to the process design support system 100 and the process design support method of the present embodiment, the total removal region, which is the difference between the shape of the material and the shape of the object, is divided by all planes, and is reconstructed after being subdivided. It becomes unnecessary, and it becomes possible to present a divided removal area that is a removal area suitable for cutting and a suitable machining order in a short time. For example, according to the process design support system 100 and the process design support method of the present embodiment, the number of division removal areas to be presented can be reduced by about two digits compared to the conventional method.

  In addition, this invention is not limited to the said embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.

  For example, in the above embodiment, the provisional plane is immediately extracted from the material data and the object data, and the division plane is determined, but the plane is perpendicular to each axis including the minimum and maximum values of each axis of the object data. You may provide the pre-processing part which divides | segments material data and removes the area | region outside the plane. In this case, what is left by the preprocessing unit becomes new material data.

  Further, as shown in FIG. 14, when a surface that needs to be processed obliquely exists in the microfabrication region, the micromachining region is divided into P11 to P13. The method of selecting the processing order in this case is the same as that described in SRV2 and SRV4. The number of open surface portions is acquired, and the processing order is determined from the number of open microprocessing regions. In this case, two processing orders can be selected in the case of P11 → P12 → P13 and the case of P11 → P13 → P12.

  In addition, although it has been described that the presence / absence of the processing constraint condition is determined each time the removal region is determined and the processing order is adjusted, the timing for adjusting the processing order is not particularly limited. For example, after the order of all the removal regions is determined, the order adjustment unit 105 may adjust the processing order. Further, the order adjusting unit 105 can also insert an area that cannot be determined depending on the division plane, for example, a hole drilled by a drill along the Y axis as shown in FIG. is there.

  The process design support system 100 may further include a total removal region extraction unit that extracts a batch of total removal regions from shape data that is information indicating the shape of the material and target data that is information indicating the shape of the target portion. I do not care.

  Moreover, you may provide the removal area reconstruction part which combines the division | segmentation removal area | region adjacent, and reconfigure | reconstructs the division removal area | region which becomes a basic unit area | region of a process operation.

  In the embodiment, the case where the total removal region 201 is divided by a temporary plane parallel to the XZ plane in the drawing and a temporary plane parallel to the XY plane has been described. This example is parallel to the ZY plane in the drawing. It is not intended to divide the total removal area 201 by a temporary plane or to deny a temporary plane that is arranged obliquely.

  The present invention can be used for designing a machining process when an object is manufactured using an NC machine or the like.

DESCRIPTION OF SYMBOLS 100 Process design support system 101 Inquiry part 102 Division | segmentation plane determination part 103 Next total removal area determination part 104 Processing order determination part 105 Order adjustment part 106 Result presentation part 200 Material 201 Total removal area 202 Object 203 Temporary plane 300 CAD software 301 CAM software

Claims (8)

A process design support system that supports the design of a machining process for removing a part of a material to obtain an object having a predetermined shape,
A division number which is the number of provisional areas obtained by dividing the total removal area by a provisional plane including a plane portion of the surface of the total removal area, which is a lump area to be removed, obtained based on the material data and the object data. An inquiry section for obtaining a plurality of provisional planes;
A process design support system comprising: a division plane determination unit that determines one of the provisional planes having the division number of 3 or more as a division plane that divides the total removal region. Next, one of a plurality of division removal areas divided by the division plane determined by the division plane determination unit is determined as a next total removal area, except for one division removal area that satisfies a predetermined condition. Further comprising a total removal region determination unit;
The inquiry section
The number of divisions, which is the number of provisional areas obtained by dividing the total removal area by a provisional plane including a plane portion of the surface of the total removal area determined by the next total removal area determination unit, is obtained for a plurality of provisional planes. ,
The dividing plane determining unit is
The process design support system according to claim 1, wherein one of the provisional planes having the division number of 3 or more is determined as a next division plane. The dividing plane determining unit is
The process design support system according to claim 1, wherein the provisional plane having the maximum number of divisions is determined as a division plane. The dividing plane determining unit further includes
The process design support system according to any one of claims 1 to 3, wherein when the number of divisions obtained by dividing the total removal area by a provisional plane is 2, all provisional planes are determined as division planes. For the division removal area divided by the division plane determined by the division plane determination unit, the number of open surface portions is obtained, the region having the largest number of open surface portions is determined as the removal region, and the determined removal region is removed. A processing order determination unit that obtains the number of open surface portions for the remaining divided removal regions, determines the region having the largest number of open surface portions as the next removal region, and further sets the order of the determined removal regions as the processing order The process design support system as described in any one of Claims 1-4 provided. The process design support system according to claim 5, further comprising an order adjustment unit that changes a processing order determined based on a processing restriction condition for the division removal area.   The process design support system according to claim 5 or 6 which has a result presentation part which displays at least information about processing time and the number of times of tool change about said processing order. A process design support method for supporting design of a machining process for removing a part of a material to obtain an object having a predetermined shape,
A division number which is the number of provisional areas obtained by dividing the total removal area by a provisional plane including a plane portion of the surface of the total removal area, which is a lump area to be removed, obtained based on the material data and the object data. Inquire about multiple temporary planes,
A process design support method for determining one of provisional planes having the division number of 3 or more as a division plane for dividing the total removal region.

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