JP2016071498A - Intermediate product data generation auxiliary device and manufacturing method of cut product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermediate product data generation auxiliary device capable of appropriately adding a machining allowance to a cutting portion of an intermediate product, and further to provide a manufacturing method of a cut product.SOLUTION: An intermediate product data generation auxiliary device includes: a cut surface output section; an endpoint output section; a rough plane output section; a projection point output section; and a machining allowance determination section. The endpoint output section outputs an edge endpoint of cut surface data output by the cut surface output section. The projection point output section outputs a projection point obtained by projecting the edge endpoint of the cut surface data output by the endpoint output section in a plane of rough plane data output by the rough plane output section. Further, the machining allowance determination section determines the rough plane data obtained by projecting the projection point on a processing surface in the plane to be an object surface provided with a machining allowance when the projection point is the projection point on the processing surface on the cut surface data.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an intermediate data creation auxiliary device and a manufacturing method of a machined product. More specifically, the present invention relates to an intermediate data creation assisting device that can appropriately provide a machining allowance for a cut product and a method for manufacturing the cut product.

  A machined product may be manufactured by cutting a surface that requires surface accuracy or dimensional accuracy from a casting manufactured by casting. When cutting such a casting, it is necessary that an allowance is appropriately provided for a portion of the casting to be cut.

  For example, in Patent Document 1, a margin is provided only for a portion having a finishing symbol for designating the surface roughness in the three-dimensional shape data of the final structure (cut product). A method of creating three-dimensional shape data of an intermediate structure (casting) is disclosed. Thereby, it is said that intermediate structure shape design data can be easily produced.

Japanese Patent Laid-Open No. 9-16657

  However, in the above-described prior art, in the case where the machining allowance is not provided in the portion where the machining allowance should be added to the created three-dimensional shape data of the casting, this cannot be properly found. That is, even when there is a forgotten provision for the allowance, the casting is manufactured based on the three-dimensional shape data of the casting for which the allowance is forgotten. In this case, there is a problem that it is impossible to manufacture a machined product with a good machined surface formed from a casting that has forgotten to provide a machining allowance.

  The present invention has been made for the purpose of solving the problems of the prior art described above. That is, the problem is to provide an intermediate data creation assisting device and a method for manufacturing a machined product, which can appropriately add a machining allowance to an intermediate cutting site.

  An intermediate data creation auxiliary device according to an aspect of the present invention, which has been made for the purpose of solving this problem, is based on cutting product data that is three-dimensional shape data of a cutting product after cutting. An intermediate data creation auxiliary device that assists in the creation of intermediate data that creates intermediate data, which is the three-dimensional shape data of an intermediate with a machining allowance, and outputs the cutting surface data in the cut product data Cutting surface output unit, end point output unit that outputs edge end points that are the end points of the edge of the cutting surface data output by the cutting surface output unit, and unfinished intermediate data that is unfinished intermediate data A rough plane output unit that outputs rough plane data, which is plane data in the data, and an edge end point output by the end point output unit, and a method of cutting surface data within the surface of the rough plane data output by the rough plane output unit. Line Alternatively, a projection point output unit that outputs a projection point projected in the normal direction of the rough plane data, and rough plane data in which the projection point is projected in the plane based on the projection point output by the projection point output unit is obtained. A machining allowance determining unit that determines whether or not the target surface is to be provided with a machining allowance, and the machining allowance determining unit, when the projection point is a projected point on the machining surface on the machining surface data, The rough plane data obtained by projecting the upper projection point on the surface is determined to be the target surface for which the allowance is provided, and the rough plane data that is not determined to be the target surface for which the allowance is provided, The intermediate data creation assisting device is characterized in that it is determined that the intermediate data is not present.

  In the intermediate data creation auxiliary device of the present invention, a projection point is created by projecting the edge end point of the cut surface data of the cut product data within the surface of the rough plane data in the incomplete intermediate data. When the projection point is a projection point on the processing surface, the rough plane data in which the projection point on the processing surface is projected on the surface is determined to be a target surface to which a machining allowance is added. By adding the machining allowance to the rough plane data determined to be the target surface to which the machining allowance is added, intermediate data to which the machining allowance is appropriately added can be created. Therefore, an allowance can be appropriately added to the cutting portion of the intermediate body.

  In the intermediate data creation auxiliary device described above, the end point output unit outputs all of the edge end points of the cut surface data, and the projection point output unit outputs the rough plane data for all edge end points. The projection point projected on the surface is output, and the machining allowance determination unit determines that at least one of the projected points projected on the surface of the rough plane data is a projected point on the processing surface. The rough plane data obtained by projecting the projection point on the processing surface into the plane is preferably determined to be the target plane on which the machining allowance is provided. By using all of the edge end points, some allowances are added, but rough plane data that needs to add allowances to other parts is also the target surface where allowances are appropriately provided This is because it can be determined.

  In the intermediate data creation assisting device described above, the rough plane output unit outputs all the rough plane data in the incomplete intermediate data, and the projection point output unit outputs all the rough plane data. Each of them outputs a projection point obtained by projecting the edge end point into the surface, and the machining allowance judgment unit judges whether or not each rough plane data is a target surface for which a machining allowance is provided. It is preferable. This is because it is possible to determine whether or not all rough plane data are target surfaces to which a machining allowance is added. That is, it is possible to determine that all rough plane data to which a machining allowance is to be added are target surfaces to which a machining allowance is added.

  In the intermediate data creation auxiliary device described above, a projection point distance that is a distance between the cutting surface data output by the cutting surface output unit and the projection point output by the projection point output unit for the edge end point is calculated. A projection point distance output unit that outputs the projection point distance, and when the projection point distance calculated by the projection point distance output unit is less than or equal to a predetermined projection point distance threshold, If the point is determined to be a projection point on the processing surface and the projection point distance calculated by the projection point distance output unit exceeds the projection point distance threshold, the projection point related to the projection point distance is determined on the processing surface. It is preferable to determine that the point is not a projection point. This is because it is possible to determine that rough plane data to which sufficient machining allowance is not added is a target surface to which machining allowance is added.

  A manufacturing method for a machined product according to another aspect of the present invention is a manufacturing method for a machined product that produces a machined product by performing cutting on an intermediate body. Intermediate data creation process for creating intermediate data, which is the 3D shape data of the intermediate before cutting, based on the cut product data, which is the 3D shape data of the cut product, and intermediate data creation An intermediate manufacturing process for manufacturing an intermediate based on the intermediate data generated in the process, and a cutting process for manufacturing a cut product by cutting the intermediate manufactured in the intermediate manufacturing process. In the intermediate data creation process, as a device to assist in the creation of intermediate data, a cutting surface output unit that outputs the cutting surface data in the cut product data, and a cutting surface output by the cutting surface output unit Around the data An end point output unit that outputs an edge end point that is an end point of the edge to be formed, a rough plane output unit that outputs rough plane data that is plane data in incomplete intermediate data that is incomplete intermediate data, and an end point output Projection point output for projecting the edge end point output from the part into the surface of the rough plane data output from the rough plane output part in the normal direction of the cut surface data or the normal direction of the rough plane data And a stock allowance determining unit that determines whether or not the rough plane data in which the projection point is projected in the plane is a target surface to be provided with allowance based on the projection point output from the projection point output unit. If the projection allowance is a projection point on the machined surface on the machined surface data, the machining allowance judgment unit uses the rough plane data obtained by projecting the projection point on the machined surface within It is a target surface that is determined to be a surface and is provided with a margin. For rough plane data that is not determined as an intermediate data creation auxiliary device, which is determined not to be a target surface for which a machining allowance is provided, at least determined as a target surface for which a machining allowance is provided by the intermediate data creation auxiliary device The intermediate data is created by providing a margin for the rough surface data of the completed incomplete intermediate data, and in the cutting process, at least the intermediate data of the intermediate data to which the margin is added in the intermediate data creation step is created. It is a manufacturing method of the cut product characterized by cutting into a location.

  ADVANTAGE OF THE INVENTION According to this invention, the intermediate body data preparation auxiliary | assistance apparatus and the manufacturing method of a cutting product which can add an allowance appropriately to the cutting location of an intermediate body are provided.

It is a figure for demonstrating the casting data preparation auxiliary | assistance apparatus which concerns on a 1st form. It is a flowchart which shows the procedure which determines whether it is necessary to add the machining allowance by the casting data creation auxiliary device which concerns on a 1st form. It is a figure which shows an example of cutting product data partially. It is a figure which shows an example of incomplete casting data partially. It is sectional drawing which overlapped and showed a part of cutting product data and incomplete casting data. FIG. 6 is a cross-sectional view showing a part different from FIG. 5 in the cut product data and the incomplete casting data. FIG. 5 and FIG. 6 of the cut product data and the incomplete casting data are cross-sectional views showing different portions in an overlapping manner. It is a figure which shows partially an example of the cutting product data different from FIG. It is a figure which shows partially an example of incomplete casting data different from FIG. It is a figure for demonstrating the casting data preparation auxiliary | assistance apparatus which concerns on a 2nd form. It is a flowchart which shows the procedure which determines whether it is necessary to add the machining allowance by the casting data creation auxiliary device which concerns on a 2nd form. It is sectional drawing which showed the case where there is a difference which is not enough as a machining allowance in the position of cutting product data and incomplete casting data.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best mode for embodying the present invention will be described in detail with reference to the drawings. In the present embodiment, a method for manufacturing a cast product as an intermediate body before cutting is performed, and manufacturing the cut product by cutting the cast product will be described.

[First embodiment]
In the first embodiment, a machined product is manufactured by the procedure described below.
1. Creation of casting data2. 2. Manufacture of castings Cutting of casting allowance

  In this embodiment, first, “1. Create casting data” is performed. The casting data in this embodiment is three-dimensional shape data. The casting data is created based on cutting product data that is three-dimensional shape data of a cutting product after cutting. Furthermore, in this embodiment, incomplete casting data, which is incomplete casting data created in advance based on cutting product data, is used.

  The incomplete casting data is created so that the casting before the cut product can be manufactured as close to the cut product as possible. That is, the incomplete casting data is, for example, a state in which a hole having a shape that cannot be formed by casting is not formed in a cut product.

  Here, some parts require high dimensional accuracy and surface accuracy. Such a surface requiring high accuracy is formed by cutting. Therefore, the casting must have an appropriate machining allowance on the surface of the machined product that requires high accuracy. To that end, it is important that the casting data is provided with a margin for the part to be cut. Therefore, in this embodiment, the casting data is created by adding the machining allowance to the incomplete casting data. This method of creating casting data with allowances for incomplete casting data will be described in detail later.

  Next, “2. Production of casting” is performed based on the created casting data. That is, a casting is manufactured by first producing a mold and pouring molten metal into the mold. The mold is made so that the molten metal poured into the mold is in the shape of the casting data. Also, after pouring the molten metal into the mold, the molten metal is cooled. The molten metal in the mold is cooled and solidified to produce a casting having a shape according to the casting data. Then, the casting is taken out from the mold. Thereby, a casting is manufactured.

  Then, “3. Cutting process of casting allowance” is performed. The casting is manufactured according to the casting data. For this reason, a allowance is provided for the casting. Therefore, a cutting product is manufactured by cutting the portion of the machining allowance with a milling machine or the like. It should be noted that cutting may be performed on portions other than the casting allowance.

  Here, a method for creating casting data of this embodiment will be described. As described above, in the present embodiment, casting data is created by adding a machining allowance to incomplete casting data. Further, in this embodiment, the casting data is created while using a device that assists so that an allowance is appropriately provided.

  FIG. 1 shows a casting data creation assisting apparatus 10 that assists in creating casting data of this embodiment. The casting data creation auxiliary device 10 determines whether or not it is necessary to add a machining allowance to the incomplete casting data based on the inputted cutting product data and incomplete casting data. Further, the casting data creation auxiliary device 10 of this embodiment includes a machining allowance determination unit 11, a cutting surface output unit 12, an end point output unit 13, a rough plane output unit 14, and a projection point output unit 15. The casting data creation auxiliary device 10 determines whether or not it is necessary to add a machining allowance to the incomplete casting data by the machining allowance determination unit 11.

  The cutting surface output unit 12 acquires and outputs all cutting surface data in the cutting product data input to the casting data creation auxiliary device 10. Therefore, information indicating that the surface is a cutting surface is given to the cutting surface data in the cutting product data input to the casting data creation auxiliary device 10 in advance. The information indicating that it is a cut surface can be performed, for example, by adding color information and attributes to the cut surface data of the cut product data.

  The end point output unit 13 acquires and outputs all edge end points that are end points of the edges constituting the outer periphery of the cut surface data. The rough plane output unit 14 acquires and outputs all rough plane data, which is plane data in the incomplete casting data input to the casting data creation auxiliary device 10. The projection point output unit 15 acquires and outputs the projection points projected on all the rough plane data planes with respect to the normal direction of the cutting surface related to the edge end points, respectively. .

  Here, the procedure for determining whether or not it is necessary to add a machining allowance by the casting data creation assisting device 10 of the present embodiment will be described with reference to the flowchart of FIG. First, the cutting surface output unit 12 acquires and outputs cutting surface data in the input cutting product data (S101). The end point output unit 13 acquires and outputs all edge end points of the cut surface data output by the cutting surface output unit 12 (S102).

  Subsequently, the rough plane output unit 14 acquires and outputs rough plane data in the input incomplete casting data (S103). The projection point output unit 15 acquires and outputs a projection point obtained by projecting the edge end point output from the end point output unit 13 onto the surface of the rough plane data output from the rough plane output unit 14 (S104).

  Then, the machining allowance determination unit 11 determines whether or not the projection point output by the projection point output unit 15 is a point on the cutting surface data output by the cutting surface output unit 12 (S105). Whether or not the projection point is a point on the cutting surface data, that is, a projection point on the processing surface depends on whether or not the distance between the projection point and the edge end point related to the projection point is 0, for example. Can be determined.

  When it is determined that the projection point is a projection point on the machining surface (S105: YES), the rough plane data related to the projection point on the machining surface in the incomplete casting data is a target surface to which a machining allowance is added. (S106). On the other hand, when it is determined that the projection point is not the projection point on the processing surface (S105: NO), the rough plane data related to the projection point in the incomplete casting data is the target surface to which the machining allowance is added. (S107).

  When there are a plurality of edge end points on the cut surface, the projection point output unit 15 obtains and outputs projection points by projecting all the edge end points on the surface of the rough plane data. Then, when there are a plurality of projection points projected on the rough plane data and the at least one of the plurality of projection points is a projection point on the machining surface, the machining allowance determination unit 11 projects the projection point on the machining surface. It is determined that the rough plane data projected onto the plane is the target plane to which a machining allowance is added.

  The rough plane output unit 14 can output all rough plane data. Then, in the casting data creation auxiliary device 10, when there are a plurality of output rough plane data, the procedure from step S103 is performed by the number of rough plane data. Then, the casting data creation assisting device 10 determines that all rough plane data are target surfaces to which machining allowance is added (S106) or are not target surfaces to which machining allowance is added (S107). it can.

  Furthermore, the cutting surface output unit 12 can output all cutting surface data. Then, in the casting data creation auxiliary device 10, when there are a plurality of cutting surface data, the procedure of FIG. 2 is performed by the number of the cutting surface data. Then, in the casting data creation auxiliary device 10, there is a rough plane to which a machining allowance is to be added for all the cut surfaces (S106), or there is no rough plane to which a machining allowance is added (S107). Can be determined. Thus, the casting data creation auxiliary device 10 determines whether or not it is necessary to add a machining allowance for the incomplete casting data.

  Next, the present embodiment will be described using an example of cut product data and incomplete casting data. FIG. 3 is a diagram illustrating a part of the cut product data X1 which is an example of the cut product data. FIG. 4 is a diagram showing a part of incomplete casting data X2 which is an example of incomplete casting data. The incomplete casting data X2 is created based on the cut product data X1. FIG. 4 shows a portion that is a portion of the cut product data X1 shown in FIG. 3 in the incomplete casting data X2.

  The cut product data X1 shown in FIG. 3 has cut surface data A, B, and C indicated by hatching. The cut surface data A, B, and C is preliminarily provided with color information indicating a cut surface. Therefore, the cutting surface output unit 12 outputs the cutting surface data A, B, and C when the cutting product data X1 is input.

  In the cut product data X1 of the example of FIG. 3, the cut surface data A, which is a shape in which two circles partially overlap, has edge end points A1 and A2 at the intersections of the circles. Therefore, the end point output unit 13 outputs the edge end points A1 and A2 for the cut surface data A. Further, the cut surface data B whose outer periphery is a quadrangle has edge end points B1, B2, B3, and B4 at the corners. For this reason, the end point output unit 13 outputs the edge end points B1, B2, B3, and B4 for the cut surface data B.

  In addition, the cut surface data C that is circular has edge end points C1 and C2 at locations facing each other on the outer circumference of the circle. In the present embodiment, the cut product data X1 is created by software in which the outer periphery of the cut surface data C that is circular is formed by combining two semicircles within the same surface so that the end points thereof coincide with each other. Because. Therefore, the end point output unit 13 outputs the edge end points C1 and C2 for the cut surface data C.

  Further, the incomplete casting data X2 shown in FIG. 4 has rough plane data D, E, and F indicated by hatching. Therefore, when the incomplete casting data X2 is input, the rough plane output unit 14 outputs the rough plane data D, E, and F.

  FIG. 5 is a cross-sectional view showing the cut surface data A portion of the cut product data X1 and the rough plane data D portion of the incomplete casting data X2 in an overlapping manner. In FIG. 5, the cross section of the cut product data X1 is indicated by hatching, and the outer shape of the cross section of the incomplete casting data X2 is indicated by a thick solid line.

  As shown in FIG. 5, the rough surface data D of the incomplete casting data X2 is surface data at the same position as the cut surface data A of the cut product data X1. For this reason, the unfinished casting data X2 has no allowance for the cut surface data A of the cut product data X1, and the rough plane data D is a surface that needs to be added.

  The points at which the edge end points A1 and A2 of the cut surface data A are projected on the in-plane DP of the rough plane data D in the normal direction of the cut surface data A are set as projection points D1 and D2. Therefore, the projection point output unit 15 outputs the projection points D1 and D2.

  The rough plane data D of the incomplete casting data X2 is at the same position as the cut surface data A of the cut product data X1. For this reason, the machining allowance determination unit 11 determines that the projection points D1 and D2 are both projection points on the machining surface on the machining surface data A. That is, it can be determined that the rough plane data D obtained by projecting the projection points D1 and D2 onto the in-plane DP is a target plane to which a machining allowance is added. Thereby, it is possible to determine that the rough plane data D to which the machining allowance needs to be added is the target surface to which the machining allowance is added.

  FIG. 6 is a cross-sectional view in which the portion of the cut surface data B of the cut product data X1 and the portion of the rough plane data E of the incomplete casting data X2 are overlapped. Also in FIG. 6, the cross section of the cut product data X1 is indicated by hatching, and the outer shape of the cross section of the incomplete casting data X2 is indicated by a thick solid line.

  As shown in FIG. 6, the rough plane data E of the incomplete casting data X2 is surface data at a position different from the cut surface data B of the cut product data X1. Further, in the finished casting data X2, a machining allowance is already provided for the machined surface data B of the machined product data X1, and the rough plane data E is a surface on which no machining allowance is required.

  The points at which the edge end points B1 and B2 of the cut surface data B are projected onto the in-plane EP of the rough plane data E in the normal direction of the cut surface data B are shown as projection points E1 and E2. For the edge end points B3 and B4 shown with parentheses, the points projected on the in-plane EP of the rough plane data E in the normal direction of the cut surface data B are shown as projection points E3 and E4. ing. Therefore, the projection point output unit 15 outputs projection points E1, E2, E3, and E4.

  The rough plane data E of the incomplete casting data X2 is at a position different from the cut surface data B of the cut product data X1. Therefore, the machining allowance determination unit 11 determines that none of the projection points E1, E2, E3, and E4 are projection points on the machining surface on the machining surface data B. That is, it is determined that the rough plane data E obtained by projecting the projection points E1, E2, E3, and E4 onto the in-plane EP is not a target plane to which a machining allowance is added. Thereby, it is possible to determine that the rough plane data E in which the machining allowance of the incomplete casting data X2 is already provided is not a target surface to which machining allowance is added.

  FIG. 7 is a cross-sectional view in which the cut surface data C portion of the cut product data X1 and the rough plane data F portion of the incomplete casting data X2 are overlapped. Also in FIG. 7, the cross section of the cut product data X1 is indicated by hatching, and the outer shape of the cross section of the incomplete casting data X2 is indicated by a thick solid line.

  As shown in FIG. 7, the rough surface data F of the incomplete casting data X2 is surface data at a position different from the cutting surface data C of the cutting product data X1. Further, the finished casting data X2 does not need to add a machining allowance for the cut surface data C of the machined product data X1, and the rough plane data F is a surface that does not need a machining allowance.

  The points at which the edge end points C1 and C2 of the cut surface data C are projected onto the in-plane FP of the rough plane data F in the normal direction of the cut surface data C are shown as projection points F1 and F2. Therefore, the projection point output unit 15 outputs the projection points F1 and F2.

  The rough plane data F of the incomplete casting data X2 is at a position different from the cut surface data C of the cut product data X1. For this reason, the machining allowance determination unit 11 determines that both the projection points F1 and F2 are not projection points on the machining surface on the machining surface data C. That is, it is determined that the rough plane data F obtained by projecting the projection points F1 and F2 onto the in-plane FP is not a target plane to which a machining allowance is added. As a result, it is possible to determine that the rough plane data F that does not require the machining allowance of the incomplete casting data X2 is not the target surface to which the machining allowance is added.

  As described above, the casting data creation assisting device 10 according to the present embodiment determines that the rough plane data D that needs to be added with respect to the incomplete casting data X2 is the target surface to which the allowance is added appropriately. can do. Thereby, after that, an allowance is appropriately added to the rough plane data D of the incomplete casting data X2, and the casting data of the cut product data X1 can be created.

  Next, FIG. 8 is a diagram illustrating a part of the cut product data Y1 which is an example of the cut product data. FIG. 9 is a diagram showing a part of incomplete casting data Y2, which is an example of incomplete casting data. The incomplete casting data Y2 is created based on the cut product data Y1. FIG. 9 shows a portion of the incomplete casting data Y2 that is the portion of the cut product data Y1 shown in FIG.

  The cut product data Y1 shown in FIG. 8 has cut surface data G indicated by hatching. Also for the cut surface data G, color information indicating a cut surface is provided in advance. Therefore, the cutting surface output unit 12 outputs the cutting surface data G when the cutting product data Y1 is input.

  In the cut product data Y1 in FIG. 8, the cut surface data G has eight edge end points G1 to G8. Therefore, the end point output unit 13 outputs all the edge end points G1 to G8 for the cut surface data G.

  Further, the incomplete casting data Y2 shown in FIG. 9 has rough plane data H indicated by hatching. Therefore, the rough plane output unit 14 outputs the rough plane data H when the incomplete casting data Y2 is input.

  Here, the rough plane data H shown in FIG. 9 is in the same plane as the cut surface data G shown in FIG. That is, the rough plane data H is at the same position as a part of the cut surface data G. For this reason, the unfinished casting data Y2 does not have a part of the machining allowance for the cut surface data G of the machined product data Y1, and the rough plane data H is a surface on which a machining allowance needs to be added.

  And in FIG. 9, the points which projected the edge end points G1-G8 of the cutting surface data G in the surface of the rough plane data H about the normal line direction of the cutting surface data G are set as projection points H1-H8. Show. Therefore, the projection point output unit 15 outputs the projection points H1 to H8.

  The rough plane data H of the incomplete casting data Y2 is at the same position as a part of the cut surface data G of the cut product data Y1. For this reason, the machining allowance determination unit 11 determines that the projection points H1 to H8 are all projection points on the machining surface on the machining surface data G. That is, it is determined that the rough plane data H obtained by projecting the projection points H1 to H8 in the plane is the target plane to which the allowance is added.

  As a result, the casting data creation assisting device 10 can obtain the rough plane data H even when the rough plane data H of the incomplete casting data Y2 is the same as only a part of the cut surface data G of the cut product data Y1. It is possible to appropriately determine that the surface is a target surface to which a machining allowance is added. This is because, based on all edge end points, it is determined whether or not the rough plane data is a target plane for which a margin is provided. Then, after that, an allowance is appropriately added to the rough plane data H of the incomplete casting data Y2, and the casting data of the cut product data Y1 can be created.

  On the other hand, for example, when the determination as to whether or not to add the machining allowance is performed using only the edge end points G6 and G7 of the cutting surface data G using an apparatus different from the present embodiment, the rough plane data H is There is a possibility that it cannot be determined that it is a target surface to which an allowance is appropriately added. That is, as shown in FIG. 9, the edge end points G6 and G7 of the cut surface data G are located inside the incomplete casting data Y2. For this reason, it may be determined that the machining allowance for the cut surface data G has already been added. Therefore, the casting data of the cut product data Y1 may not be properly created.

  As described above, the casting data creation auxiliary device 10 according to the present embodiment can output the result of appropriately determining rough plane data that needs to have a machining allowance added to incomplete casting data. The user of the casting data creation auxiliary device 10 can appropriately add a margin to the incomplete casting data based on the determination result output from the casting data creation assistance device 10. In addition, since it is possible to determine whether or not all rough plane data are target surfaces for which a machining allowance is provided, machining allowance can be added without omission. That is, casting data with an appropriate machining allowance can be created by “1. creation of casting data” using the casting data creation assisting device 10.

  In addition, a casting with an appropriate machining allowance is manufactured by performing “2. Manufacturing of casting” based on the created casting data. Then, the cutting surface of the manufactured casting is cut by the portion of the machining allowance added by the above “1. Creation of casting data”. The formed cut product can be manufactured.

  As described in detail above, the casting data creation assisting device 10 according to the present embodiment includes the machining allowance determination unit 11, the cutting surface output unit 12, the end point output unit 13, the rough plane output unit 14, and the projection point output unit 15. doing. Then, the casting data creation auxiliary device 10 can appropriately determine whether or not the rough plane data in the input incomplete casting data is a target surface to which a machining allowance is added. Therefore, it is possible to create casting data in which an allowance is appropriately added to incomplete casting data. Then, by producing a casting based on the casting data and performing cutting on the portion of the casting allowance, it is possible to produce a cut product having a well-cut surface. Therefore, an intermediate data creation assisting device and a method for manufacturing a cut product that can appropriately add a machining allowance to a cutting position of the intermediate have been realized.

[Second form]
Next, the second embodiment will be described. In the second embodiment, a casting data creation auxiliary device different from the casting data creation assistance device 10 of the first embodiment is used. In this embodiment as well, as in the first embodiment, a cut product is manufactured according to the procedure described below.
1. Creation of casting data2. 2. Manufacture of castings Cutting of casting allowance

  Also in this embodiment, “2 casting production” and “3. machining of casting allowance” are the same as in the first embodiment. Also, in “1. Creation of casting data”, casting data is created by providing a margin for unfinished casting data created in advance based on cutting product data. In this embodiment, the casting data is created using the casting data creation assistance device 20 shown in FIG. 10 which is different from the casting data creation assistance device 10 (FIG. 1) of the first embodiment.

  The casting data creation auxiliary device 20 of the present embodiment also determines whether or not it is necessary to add a margin to the incomplete casting data based on the input cutting product data and the incomplete casting data. . As shown in FIG. 10, the casting data creation auxiliary device 20 of this embodiment includes a machining allowance determination unit 21, a cutting surface output unit 22, an end point output unit 23, a rough plane output unit 24, a projection point output unit 25, a projection. A point distance output unit 26 is provided.

  The cutting surface output unit 22, the end point output unit 23, the rough plane output unit 24, and the projection point output unit 25 of the casting data creation auxiliary device 20 are the cutting surface output unit 12 of the casting data creation auxiliary device 10 of the first embodiment, respectively. The same as the end point output unit 13, the rough plane output unit 14, and the projection point output unit 15. That is, the machining allowance determination unit 21 of the casting data creation assisting device 20 of the present embodiment is different from the machining allowance determination unit 11 of the casting data creation assisting device 10 of the first embodiment. Further, the casting data creation assisting device 20 has a projection point distance output unit 26, unlike the casting data creation assisting device 10 of the first embodiment.

  The projection point distance output unit 26 calculates a projection point distance that is a distance between the cutting surface data output by the cutting surface output unit 22 and the projection point output by the projection point output unit 25 for the edge end point of the cutting surface data. Calculate and output. Then, the machining allowance determination unit 21 of the casting data creation auxiliary device 20 according to the present embodiment determines whether or not it is necessary to add machining allowance to the incomplete casting data based on the projection point distance output by the projection point distance output unit 26. Judgment.

  Here, the procedure for determining whether or not it is necessary to add a machining allowance by the casting data creation auxiliary device 20 of the present embodiment will be described with reference to the flowchart of FIG. First, the cutting surface output unit 22 acquires and outputs cutting surface data in the input cutting product data (S201). The end point output unit 23 acquires and outputs all edge end points of the cut surface data output by the cutting surface output unit 22 (S202).

  Subsequently, the rough plane output unit 24 acquires and outputs rough plane data in the input incomplete casting data (S203). The projection point output unit 25 acquires and outputs a projection point obtained by projecting the edge end point output by the end point output unit 23 onto the surface of the rough plane data output by the rough plane output unit 24 (S204).

  Next, the projection point distance output unit 26 calculates and outputs the distance between the cutting surface data output by the cutting surface output unit 22 and the projection point output by the projection point output unit 25 (S205). The distance between the cut surface data and the projection point can be calculated by, for example, the distance between the projection point and the edge end point related to the projection point.

  Then, when the projection point distance output by the projection point distance output unit 26 is equal to or less than a predetermined threshold (S206: YES), the machining allowance determination unit 21 projects the projection point related to the projection point distance on the processing surface. It is determined to be a point. Thereby, it is determined that the rough plane data relating to the projection point on the processing surface in the incomplete casting data is a target surface to which a machining allowance is added (S207). Note that the threshold value is set to a value whose length is sufficient for the allowance.

  On the other hand, when the projection point distance output by the projection point distance output unit 26 exceeds a predetermined threshold (S206: NO), it is determined that the projection point related to the projection point distance is not a projection point on the processing surface. Thereby, it is determined that the rough plane data relating to the projection point determined not to be the projection point on the processing surface in the incomplete casting data is not the target surface to which the machining allowance is added (S208).

  In other words, the casting data creation assisting device 20 also determines that if the difference between the cutting surface data and the rough plane data is not sufficient as the allowance even when the positions of the cutting surface data and the rough plane data are different. The rough plane data can be determined as the target surface of the machining allowance.

  FIG. 12 is a cross-sectional view of the cut surface data A portion of the cut product data X1 described with reference to FIG. Further, in FIG. 12, the outer shape of the cross section of the incomplete casting data X3 different from that in FIG. 4 is indicated by a thick solid line. The unfinished casting data X3 in FIG. 12 differs from that in FIG. 4 in that the position of the rough plane data I is slightly different from the position of the cut surface data A.

  Such a slight difference between the rough plane data I and the cut surface data A may occur, for example, in the conversion process when the cut product data X1 or the incomplete casting data X3 is converted into data of a different format. . Further, when the machining allowance for the cut surface data A is added, the added machining allowance may not be sufficient. However, since the difference between the rough plane data I and the cut surface data A is small, the unfinished casting data X3 does not have a sufficient allowance for the cut surface data A, and the rough plane data I has no allowance. It is a surface that needs to be added.

  First, the cutting surface output unit 22 of the casting data creation auxiliary device 20 of the present embodiment outputs the cutting surface data A when the cutting product data X1 is input. The end point output unit 23 outputs edge end points A1 and A2. Further, the rough plane output unit 24 outputs the rough plane data I when the incomplete casting data X3 is input. In addition, the projection point output unit 25 projects the edge end points A1 and A2 of the cutting surface data A onto the in-plane IP of the rough plane data I in the normal direction of the cutting surface data A, respectively. Is output.

  Next, the projection point distance output unit 26 calculates and outputs a projection point distance L that is a distance from the cut surface data A for each of the projection points I1 and I2. Further, FIG. 12 shows a threshold K of the projection point distance. That is, the projection point distance L is shorter than the threshold value K. Therefore, when the projection point distance L is equal to or less than the threshold value K, the machining allowance determination unit 21 determines that the projection points I1 and I2 related to the projection point distance L are projection points on the processing surface. Thereby, it is possible to determine that the rough plane data I relating to the projection points I1 and I2 that are projection points on the processing surface in the incomplete casting data X3 is a target surface to which a machining allowance is added.

  Therefore, the casting data creation auxiliary device 20 according to the present embodiment appropriately adds the allowance to the rough plane data even when there is a difference that is not sufficient as the allowance between the cut surface data and the rough plane data. Can be determined as the target surface to be used. In other words, by using the casting data creation assisting device 20 of this embodiment, casting data having an allowance of an appropriate size can be created.

  As described above, the casting data creation auxiliary device 20 according to the present embodiment determines whether or not a sufficient machining allowance is appropriately added to rough plane data that needs to be added a machining allowance for incomplete casting data. The result can be output. That is, the user can create casting data to which a sufficient machining allowance is appropriately added by “1. creation of casting data” using the casting data creation assisting device 20.

  Further, by performing “2. Manufacturing of casting” based on the created casting data, a casting with a sufficient allowance added is manufactured. Then, the cutting surface of the manufactured casting is cut by the portion of the machining allowance added by the above “1. Creation of casting data”. The formed cut product can be manufactured.

  As described above in detail, the casting data creation auxiliary device 20 according to the present embodiment includes a machining allowance determination unit 21, a cutting surface output unit 22, an end point output unit 23, a rough plane output unit 24, a projection point output unit 25, a projection. A point distance output unit 26 is provided. The casting data creation auxiliary device 20 can also appropriately determine whether the rough plane data in the input incomplete casting data is a target surface to which a machining allowance is added. Further, the casting data creation auxiliary device 20 can create casting data to which a sufficient machining allowance is added in order to form a good cut surface. Then, by producing a casting based on the casting data and performing cutting on the portion of the casting allowance, it is possible to produce a cut product having a well-cut surface. Therefore, also in this embodiment, an intermediate data creation assisting device and a method for manufacturing a cut product that can appropriately add a machining allowance to a cutting position of the intermediate are realized.

  In addition, said embodiment is only a mere illustration and does not limit this invention at all. Accordingly, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. That is, for example, in the above-described embodiment, the projection point output units 15 and 25 acquire and output the projection points obtained by projecting the edge end points on the surface of the rough plane data in the normal direction of the cut surface data. Explained as a thing. However, the projection point output units 15 and 25 may acquire and output the projection points obtained by projecting the edge end points in the plane of the rough plane data in the normal direction of the rough plane data. This is because it is still possible to appropriately determine whether or not the rough plane data projected in the plane is the target plane for which the allowance is provided based on the projection point.

  In addition, for example, the cutting surface output units 12 and 22 are not limited to acquiring and outputting all the cutting surface data in the cutting product data, and some cutting surfaces designated by the user in the cutting surface data. It is also possible to output only the processed surface data. This is because it is possible to determine whether the machining allowance is appropriately added to the incomplete casting data for the portion of the cut surface data designated by the user.

  Also, for example, in the above embodiment, incomplete casting data is created so that the casting before the cutting product can be manufactured in a shape as close as possible to the cutting product, that is, a hole having a shape that cannot be formed by casting. It demonstrated as a thing of the state which is not formed. However, the cut product data can be used directly as incomplete casting data. Further, for example, the present invention is not limited to the case where the intermediate body is manufactured by casting, but can also be applied to the case where the intermediate body is manufactured by forging.

DESCRIPTION OF SYMBOLS 10 Casting data preparation auxiliary | assistance apparatus 11 Cutting allowance determination part 12 Cutting surface output part 13 End point output part 14 Rough surface output part 15 Projection point output part X1 Cutting product data X2 Incomplete casting data A, B, C Cutting surface data A1 , A2, B1, B2, B3, B4, C1, C2 Edge end points D, E, F Rough plane data D1, D2, E1, E2, E3, E4, F1, F2 Projection points

Claims (5)

Intermediate data for creating intermediate data, which is three-dimensional shape data of an intermediate with a machining allowance added, based on the cut product data, which is the three-dimensional shape data of the cut product after cutting. In the intermediate data creation auxiliary device that assists the creation,
A cutting surface output section for outputting cutting surface data in the cutting product data;
An end point output unit that outputs an edge end point that is an end point of an edge constituting the outer periphery of the cutting surface data output by the cutting surface output unit;
A rough plane output unit for outputting rough plane data which is plane data in the incomplete intermediate data which is the incomplete intermediate data;
The edge end point output from the end point output unit is projected in the surface of the rough plane data output from the rough plane output unit with respect to the normal direction of the cutting surface data or the normal direction of the rough plane data. A projection point output unit for outputting projection points;
Based on the projection point output by the projection point output unit, a stock allowance determining unit that determines whether or not the rough plane data in which the projection point is projected in a plane is a target surface for which a stock allowance is provided Have
The allowance determining unit
When the projection point is a projection point on the machining surface on the cutting surface data, the rough plane data obtained by projecting the projection point on the machining surface into a plane is determined to be a target surface for which a margin is provided. And
The intermediate data creation assisting device, wherein the rough plane data that is not determined to be a target surface for which a machining allowance is provided is determined not to be a target surface for which a machining allowance is provided. In the intermediate data creation auxiliary device according to claim 1,
The end point output unit outputs all of the edge end points of the cutting surface data,
The projection point output unit outputs the projection points projected on the rough plane data for all the edge end points;
The allowance determining unit
If at least one of the projection points projected on the surface of the rough plane data is the projection point on the machining surface, the rough plane data obtained by projecting the projection point on the machining surface in the plane Is determined to be a target surface on which a machining allowance is provided. In the intermediate data creation assisting device according to claim 1 or 2,
The rough plane output unit outputs all the rough plane data in the incomplete intermediate data,
The projection point output unit outputs the projection point obtained by projecting the edge end point in a plane for each of the rough plane data,
The allowance determining unit
An intermediate data creation assisting device for determining whether or not each of the rough plane data is a target surface for which a machining allowance is provided. In the intermediate data creation auxiliary device according to any one of claims 1 to 3,
A projection point distance output unit that calculates and outputs a projection point distance that is a distance between the cutting surface data output by the cutting surface output unit and the projection point output by the projection point output unit for the edge end point. Have
The allowance determining unit
When the projection point distance calculated by the projection point distance output unit is equal to or less than a predetermined projection point distance threshold, the projection point related to the projection point distance is determined to be a projection point on the processing surface. ,
When the projection point distance calculated by the projection point distance output unit exceeds the projection point distance threshold, the projection point related to the projection point distance is determined not to be a projection point on the processing surface. An intermediate data creation assisting device, characterized in that In a manufacturing method of a cut product in which a cut product is manufactured by cutting an intermediate body,
Intermediate data creation to create intermediate data that is 3D shape data of the intermediate before cutting based on the cut product data that is 3D shape data of the cut product after cutting. Process,
An intermediate production process for producing the intermediate based on the intermediate data created in the intermediate data creation process;
A cutting process for manufacturing the cut product by performing cutting on the intermediate manufactured in the intermediate manufacturing process,
In the intermediate data creation step,
As a device to assist in the creation of the intermediate data,
A cutting surface output section for outputting cutting surface data in the cutting product data;
An end point output unit that outputs an edge end point that is an end point of an edge constituting the outer periphery of the cutting surface data output by the cutting surface output unit;
A rough plane output unit for outputting rough plane data which is plane data in the incomplete intermediate data which is the incomplete intermediate data;
The edge end point output from the end point output unit is projected in the surface of the rough plane data output from the rough plane output unit with respect to the normal direction of the cutting surface data or the normal direction of the rough plane data. A projection point output unit for outputting projection points;
Based on the projection point output by the projection point output unit, a stock allowance determining unit that determines whether or not the rough plane data in which the projection point is projected in a plane is a target surface for which a stock allowance is provided Have
The allowance determining unit
When the projection point is a projection point on the machining surface on the cutting surface data, the rough plane data obtained by projecting the projection point on the machining surface into a plane is determined to be a target surface for which a margin is provided. And
For the rough plane data that is not determined to be a target surface for which a machining allowance is provided, an intermediate data creation assisting device that is determined not to be a target surface for which a machining allowance is provided is used.
Creating intermediate data by providing an allowance for the rough plane data of the unfinished intermediate data determined to be a target surface for which an allowance is provided by at least the intermediate data creation assisting device;
In the cutting process,
The manufacturing method of the cutting goods characterized by cutting to the location of the said intermediate body data which added the allowance at the said intermediate body data preparation process among the said intermediate bodies.

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