Product data generation device and product data generation method

Abstract

To provide a product data generation device capable of accurately generating product data indicating a position to be processed for positioning between sheet metals by a simple operation.SOLUTION: A product data-generating device 1 includes an allocation unit 41 that allocates a processing target position at which positioning processing for positioning second parts on first parts is performed on a 3D model of a product manufactured by combining the first parts and the second parts, and a product data-generating unit 42 that generates a development view of the first and second parts in which the processing target position allocated by the allocation unit is marked using the 3D model.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a product data generation device and a product data generation method. [Background technology]

[0002] As a technology for efficiently welding parts made of sheet metal, a technology has been developed in which a predetermined shape of protrusion or groove is formed on the part to be welded, and these are used to position the two parts to be welded. By using this technology, it is possible to easily position a part to be welded relative to another part without using a jig. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-76866 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-142517 Summary of the Invention [Problem to be solved by the invention]

[0004] When welding parts together using the above-described technology, a worker uses CAM (Computer Aided Manufacturing) to generate product data by specifying coordinates for the positioning processing positions on a development drawing of the product. When generating product data in this way, the worker needs to specify the processing positions while three-dimensionally imagining the finished shape of the product and the positional relationship between the part to be processed and other parts. However, there is a problem in that specifying such positions on a two-dimensional development drawing is a heavy burden for the worker. [Means for solving the problem]

[0005] A product data generation device according to one aspect of one or more embodiments includes an allocation unit that allocates processing positions on a 3D model of a product made by combining a first part and a second part, where positioning processing is performed to position the second part on the first part, and a product data generation unit that uses the 3D model to generate, as product data, an unfolded view of the first and second parts with marks added to the processing positions allocated by the allocation unit. [Effects of the Invention]

[0006] According to the product data generation device and the product data generation method of one or more embodiments, product data indicating the positions where processing is performed to position parts relative to each other can be generated with high accuracy through simple operations. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a block diagram illustrating a configuration of a product data generation device according to one or more embodiments. [Figure 2A] 1 is an explanatory diagram of a "lap joint" type of sheet metal joint used by a product data generation device according to one or more embodiments. FIG. [Figure 2B] 1 is an explanatory diagram of a "lap joint" type of sheet metal joint used by a product data generation device according to one or more embodiments. FIG. [Figure 2C] 1 is an explanatory diagram of a "double-pull corner joint" which is a joint form of sheet metal used by a product data generation device according to one or more embodiments. FIG. [Figure 2D] 1 is an explanatory diagram of a "single pull corner joint" which is a joint form of sheet metal used by a product data generation device according to one or more embodiments. FIG. [Figure 2E] 1 is an explanatory diagram of a "half-draw corner joint" which is a joint form of sheet metal used by a product data generation device according to one or more embodiments. FIG. [Figure 3A] 1 is a flowchart illustrating a process for generating product data by a product data generation device according to one or more embodiments. [Figure 3B]1 is a flowchart illustrating a process for generating product data by a product data generation device according to one or more embodiments. [Figure 4] FIG. 2 illustrates a 3D model M of a product P displayed on a display unit of a product data generation device according to one or more embodiments. [Figure 5] 1 is an example of a development view of metal sheets W1, W2, and W3 displayed on a display unit of a product data generating device according to one or more embodiments. [Figure 6] 1 is an explanatory diagram illustrating a state in which a product data generation device according to one or more embodiments sets temporary positions of a plurality of processing objects. DETAILED DESCRIPTION OF THE INVENTION

[0008] A product data generation device and a product data generation method according to one or more embodiments will be described below with reference to the accompanying drawings. In the present embodiment, the product data generation device and the product data generation method generate product data used to weld multiple parts together to create a product.

[0009] In this embodiment, the product is produced by combining at least a first part and a second part. At least one of the first and second parts has a three-dimensional shape formed by processing sheet metal, and the product produced from these parts also has a three-dimensional shape. The first and second parts are positioned relative to each other and joined by welding to form the product.

[0010] Configuration of a product data generation device according to one or more embodiments 1 is a block diagram showing the configuration of a product data generation device 1 according to one or more embodiments. The product data generation device 1 includes an input unit 10, a display unit 20, a storage unit 30, and a CPU 40, and is equipped with a CAD (Computer Aided Design).

[0011] The input unit 10 receives operation information from an operator. The display unit 20 displays information output from the CPU 40, as will be described later.

[0012] The storage unit 30 is configured, for example, from a nonvolatile storage device such as a hard disk or flash memory, or a volatile storage device such as RAM (Random Access Memory). The storage unit 30 has a product information storage unit 31, a sheet metal information storage unit 32, a die information storage unit 33, and a product data storage unit 34.

[0013] The product information storage unit 31 stores information about the 3D model of the product to be created. The sheet metal information storage unit 32 stores attribute information about the shape of the sheet metal that forms the parts of the product. Details of this attribute information will be described later. The die information storage unit 33 stores information about each die used when performing processing for positioning other parts on a specified part (hereinafter referred to as "positioning processing"). The product data storage unit 34 stores product data generated by the CPU 40, as will be described later.

[0014] The CPU 40 is, for example, a central processing unit (CPU) provided in a general-purpose microcomputer, and constitutes one or more information processing units described below by reading and executing a predetermined product data generation program. The CPU 40 has an allocation unit 41 and a product data generation unit 42.

[0015] The allocation unit 41 acquires a 3D model of the product specified by the worker from the product information storage unit 31, and displays information about this 3D model on the display unit 20. In response to the worker's instructions, the allocation unit 41 identifies a mold to be used for positioning processing that is performed when creating this product, and allocates, on the displayed 3D model, a position where positioning processing is to be performed with the identified mold (hereinafter referred to as a "processing target position").

[0016] The product data generation unit 42 uses the information of the displayed 3D model to generate an unfolded view of each part with marks added to the processing positions allocated by the allocation unit 41 as product data for this product, and stores this in the product data storage unit 34.

[0017] Operation of a Product Data Generator According to One or More Embodiments As an operation of the product data generating device 1 according to this embodiment, a process of generating product data for performing first positioning processing or second positioning processing on parts to be welded when creating the product P will be described.

[0018] The first positioning process involves forming a ring-shaped groove on the surface of the first part and forming a ring-shaped protrusion on the surface of the second part that fits into the groove. By performing this process and engaging the protrusion with the formed groove, the second part can be positioned on the first part.

[0019] The second positioning process is a process for forming raised protrusions on the surface of the first part. By performing this process and abutting the edge of the second part against the raised protrusions formed on the first part, the second part can be positioned on the first part.

[0020] In this embodiment, attribute information regarding the form of the sheet metal forming each part is stored in the sheet metal information storage unit 32. Specifically, the sheet metal information storage unit 32 stores the following attribute information: that the sheet metal is configured to have at least one of a flat portion and a bent portion; that the sheet metal has a thickness, and that the flat portions and bent portions within one sheet metal have the same thickness; that the flat portion has three surfaces, namely, a front surface, a back surface, and a thickness surface; that the bent portion has three surfaces, namely, a front surface, a back surface, and a thickness surface; that there are two types of bent portions, namely, a peak bend and a valley bend; and that the bent portion has attribute information indicating the magnitude of the bend.

[0021] In addition, the mold information storage unit 33 stores mold identification information and restriction information for the sheet metal to be processed for each of the first mold, which is a mold for performing first positioning processing on a part, and the second mold, which is a mold for performing second positioning processing.

[0022] With regard to the first mold, the restriction information regarding the sheet metal that forms the ring-shaped groove includes information indicating that non-sheet metal is not included, that the front and back surfaces can be processed but the thickness surface of the plate cannot be processed, that instance parts described below are not included, and that there are no restrictions on the plate thickness.

[0023] Let's take a look at instance parts. In 3D CAD, there is an "instance parts model" that was devised to reduce the amount of work required by workers and to limit the amount of data to be managed. In this model, multiple instances created by copying information indicating components with the same configuration are defined as belonging to a single instance group. When the shape information of one instance in an instance group is changed, the shape information of other instances belonging to the same instance group is also changed in the same way. Instances with different shape information are not included in the same instance group. By separating some instances from a given instance group, it is possible to change the shape information of only those instances.

[0024] In this embodiment, an instance part is a metal sheet defined as one instance belonging to a predetermined instance group in 3D CAD.

[0025] In addition, with regard to the first mold, the restriction information regarding the sheet metal that forms the ring-shaped protrusion includes information indicating that non-sheet metal is not included, that the front and back surfaces can be processed but the plate thickness surface cannot be processed, that instance parts are not included, that there are no restrictions on plate thickness, and that the joint form with the sheet metal that forms the ring-shaped groove is a "lap joint."

[0026] The joint form "lap joint" is a form in which two metal plates Wa and Wb overlap on a wide area plane of the front or back surface, as shown in FIG. 2A.

[0027] In addition, with regard to the second mold, the restriction information regarding the sheet metal that forms the cut-and-raised protrusion includes information indicating that non-sheet metal is not eligible, that the front and back surfaces can be processed but the thickness surface of the plate cannot be processed, that instance parts are not eligible, and that there are no restrictions on the plate thickness.

[0028] Furthermore, with regard to the second mold, the information included indicates that there are no restrictions on the thickness of the metal plate that comes into contact with the cut-and-raised protrusion, and that the joint form with the metal plate that forms the cut-and-raised protrusion is a "lap joint," "T joint," "double-pull joint," "single-pull joint," or "half-hang joint."

[0029] The joint form "T joint" is a joint form in which the thickness surface of the metal sheet Wb contacts the flat surface of the metal sheet Wa perpendicularly, and the edges on both sides of the thickness surface of the metal sheet Wb do not overlap the edges of the metal sheet Wa, as shown in Figure 2B. The joint form "double pull joint" is a joint form in which the metal sheets Wa and Wb overlap only at their edges, as shown in Figure 2C. The joint form "single pull joint" is a joint form in which, when the thickness surface of the metal sheet Wb contacts the flat surface of the metal sheet Wa perpendicularly, one of the edges on both sides of the thickness surface of the metal sheet Wb overlaps the edge of the metal sheet Wa, as shown in Figure 2D. The joint form "half overhang joint" is a joint form in which, when the thickness surface of the metal sheet Wb contacts the flat surface of the metal sheet Wa perpendicularly, part of the thickness surface of the metal sheet Wb overlaps the flat surface of the metal sheet Wa, as shown in Figure 2E. In these joint forms, a small gap may be formed between the metal sheets Wa and Wb, but if the distance is within a predetermined distance (e.g., 0.2 mm), the two metal sheets are determined to overlap.

[0030] 3A and 3B are flowcharts showing the process of generating product data by the product data generation device 1. The process of generating product data for performing the first positioning processing and the process of generating product data for performing the second positioning processing will be described with reference to Fig. 3.

[0031] [Process for generating product data for performing first positioning processing] When the worker operates the input unit 10 to specify product P as the product to be processed ("YES" in S1), the allocation unit 41 obtains information about the 3D model M of product P from the product information memory unit 31 and displays it on the display unit 20 (S2).

[0032] 4 is a diagram showing a 3D model M of product P displayed on display unit 20. Product P is created by welding part WP1 formed from sheet metal W1, part WP2 formed from sheet metal W2, and part WP3 formed from sheet metal W3. Part WP1 has four bent portions B1, B2, B3, and B4, and has five flat portions F11, F12, F13, F14, and F15 formed by bending bent portions B1 and B4 at right angles to form valleys and bending bent portions B2 and B3 at right angles to form peaks.

[0033] The part WP2 has one flat surface F21 and is superimposed on and joined to the flat surface F13 of the part WP1. The part WP3 has one flat surface F31 and is superimposed on and joined to the flat surfaces F11 and F15 of the part WP1.

[0034] The allocation unit 41 displays a list of dies whose information is stored in the die information storage unit 33. This list includes identification information of the first die and the second die.

[0035] The worker performs an operation to designate the first mold as a mold for performing positioning processing of the flat surface portion F21 of the part WP2 relative to the flat surface portion F13 of the part WP1 ("YES" in S3). The worker also performs an operation to designate the flat surface portion F13 of the part WP1 and the flat surface portion F21 of the part WP2 as the workpieces to be processed on the information displayed on the display unit 20 ("YES" in S4).

[0036] The allocation unit 41 refers to the restriction information stored in the mold information memory unit 33 for the first mold specified by the worker, and obtains attribute information from the sheet metal information memory unit 32 for the sheet metal W1 that forms the flat surface F13 of the specified part WP1 and the sheet metal W2 that forms the flat surface F21 of the part WP2, and determines whether these flat surface F13 and flat surface F21 are suitable as parts to be processed by the first mold (S5).

[0037] Here, when the allocation unit 41 determines that the specified member is not suitable for machining by the first mold ("NO" in S5), it outputs error information to the display unit 20 (S6). When the error information is output, the process returns to step S3, and the mold and the member to be machined are designated again.

[0038] In step S5, when the allocation unit 41 determines that the specified part is suitable for processing by the first mold ("YES" in S5), the flat surface F13 and flat surface F21 selected by the worker are highlighted in the display unit 20, for example.

[0039] The allocation unit 41 also determines a temporary position of the processing target within the workpiece based on preset information for determining initial positions. Here, the allocation unit 41 determines a predetermined position within the planar portion F13 of the part WP1 as a temporary position for machining a ring-shaped groove, and determines a position within the planar portion F21 of the part WP2 corresponding to this groove as a temporary position for machining a ring-shaped protrusion. The allocation unit 41 then previews ring-shaped marks D1 and D2 at the determined temporary positions within the 3D model M displayed on the display unit 20 (S7).

[0040] If the worker determines that the displayed temporary position needs to be changed before finalizing the temporary position as the position of the processing object ("NO" in S8), he or she clicks on the new position in the displayed information or specifies it with the cross cursor. When the worker specifies the new position of the temporary position of the processing object ("YES" in S9), the allocation unit 41 changes the temporary position of the processing object by shifting the display positions of the marks D1 and D2 to the specified positions (S10).

[0041] Here, when the worker performs an operation to instruct to reverse the ring-shaped groove and the protrusion, the allocation unit 41 may switch the position where the ring-shaped groove is formed and the position where the ring-shaped protrusion is formed. Specifically, by performing this operation, the allocation unit 41 changes the position so that it processes a ring-shaped groove at a predetermined position in the flat surface portion F21 of the metal sheet W2 and processes a ring-shaped protrusion at a position in the flat surface portion F13 of the metal sheet W1 that corresponds to this groove.

[0042] The processing of steps S8 to S10 is repeated until the operator performs an operation to fix the position of the processing object.

[0043] When the worker performs an operation to confirm the temporary position of the processing target ("YES" in S8), the allocation unit 41 confirms this temporary position as the processing target position for the first positioning processing (S11). The allocation unit 41 changes the display color or display state of the marks D1 and D2 from the preview display to clearly indicate that the positions of these marks D1 and D2 have been confirmed as the processing target positions.

[0044] Thereafter, when the worker performs an operation to instruct the generation of a development drawing ("YES" in S12), the product data generation unit 42 generates, as product data for the product P, development drawings of each of the parts WP1, WP2, and WP3, to which the information on the processing position acquired by the allocation unit 41 has been added, based on the 3D model M of the product P. The product data generation unit 42 displays the generated product data on the display unit 20 and stores it in the product data storage unit 34 (S13).

[0045] 5 is an example of a development view of each of the parts WP1, WP2, and WP3 displayed on the display unit 20. The development view of the metal sheet W1 clearly shows flat portions F11 to F15, bent portions B1 to B4, a mark Ba1 indicating that bent portion B1 is a valley fold, a mark Ba2 indicating that bent portion B2 is a mountain fold, a mark Ba3 indicating that bent portion B3 is a valley-mountain fold, a mark Ba4 indicating that bent portion B2 is a valley fold, and marks D1a and D2a indicating the position to be machined for the ring-shaped groove.

[0046] The development view of the metal sheet W2 clearly shows the flat surface F21 and marks D1b and D2b indicating the processing positions of the ring-shaped protrusions. This completes the process of generating product data for performing the first positioning processing.

[0047] [Process for generating product data for performing second positioning processing] When the worker operates the input unit 10 to specify product P as the product to be processed ("YES" in S1), the allocation unit 41 obtains information about the 3D model M of product P from the product information memory unit 31 and displays it on the display unit 20 (S2).

[0048] The worker performs an operation to specify the second mold as a mold for performing machining to position the flat surface F15 of the part WP1 relative to the flat surface F31 of the part WP3 ("YES" in S3). The worker also performs an operation to specify the flat surface F31 of the part WP3 as the member to be machined and the edge Fe1 in the flat surface F15 of the part WP1 as the positioning target on the information displayed on the display unit 20 ("YES" in S4).

[0049] The allocation unit 41 refers to the restriction information stored in the mold information memory unit 33 for the second mold specified by the worker, and obtains attribute information from the sheet metal information memory unit 32 for the sheet metal W3 that forms the flat surface F31 of the specified part WP3 and the sheet metal W1 that forms the flat surface F15 of the part WP1, and determines whether these flat surface F31 and flat surface F15 are suitable as parts to be processed by the second mold (S5).

[0050] Here, when the allocation unit 41 determines that the specified member is not suitable for machining by the second mold ("NO" in S5), it outputs error information to the display unit 20 (S6). When the error information is output, the process returns to step S3, and the mold and the member to be machined are designated again.

[0051] In step S5, when the allocation unit 41 determines that the specified part is suitable for processing by the second mold ("YES" in S5), the flat surface F31 and edge Fe1 selected by the worker are highlighted in the display unit 20, for example.

[0052] The allocation unit 41 also determines a temporary position of the processing target within the processing target member based on preset information for determining the initial position. Here, the allocation unit 41 determines a predetermined position within the flat surface F31 of the part WP3 as the temporary position for processing the cut-and-raised protrusion. The allocation unit 41 previews a triangular mark E1 at the determined temporary position within the 3D model M displayed on the display unit 20 (S7).

[0053] If the worker determines that it is necessary to change the displayed temporary position before finalizing the temporary position as the position to be processed ("NO" in S8), the worker clicks on the new position in the displayed information or specifies it with the cross cursor. When the worker specifies the new position of the temporary position of the processing object ("YES" in S9), the allocation unit 41 changes the temporary position of the processing object by shifting the display position of the mark E1 to the specified position (S10). The processing of steps S8 to S10 is repeated until the worker performs the operation to finalize the position to be processed.

[0054] When the worker performs an operation to confirm the temporary position of the processing target ("YES" in S8), the allocation unit 41 confirms this temporary position as the processing target position for the second positioning processing (S11). The allocation unit 41 changes the display color or display state of the mark E1 from the preview display to clearly indicate that the position of this mark E1 has been confirmed as the processing target position.

[0055] Thereafter, when the worker performs an operation to instruct the generation of a development drawing ("YES" in S12), the product data generation unit 42 generates, as product data for the product P, development drawings of each of the parts WP1, WP2, and WP3, to which the information on the processing target positions acquired by the allocation unit 41 is added, based on the 3D model M of the product P. As a result, as shown in Fig. 5, a mark E1 indicating the processing target position of the cut-and-raised protrusion is clearly displayed in the development drawing of the part WP3.

[0056] The product data generation unit 42 displays the generated product data on the display unit 20 and stores it in the product data storage unit 34 (S13). This completes the process of generating product data for performing the second positioning processing.

[0057] When creating the product P, the worker uses the product data of the product P stored in the product data storage unit 34 to bend the metal sheet W1 with a bending machine (not shown). The worker also uses the product data to perform a first positioning process on the metal sheets W1 and W2 with a laser processing machine (not shown). The worker then positions the metal sheet W2 relative to the metal sheet W1 by engaging a ring-shaped groove formed on the flat surface F13 of the metal sheet W1 with a ring-shaped protrusion formed on the flat surface F21 of the metal sheet W2 through the first positioning process, and issues an instruction to perform welding of the metal sheets W1 and W2.

[0058] The worker also performs second positioning processing on the metal sheet W3. The worker then positions the metal sheet W1 relative to the metal sheet W3 by bringing the edge Fe1 of the metal sheet W2 into contact with the cut-and-raised protrusion formed on the flat surface F31 of the metal sheet W3 by the second positioning processing, and issues an instruction to perform welding processing on the metal sheets W3 and W1. This completes the production of the product P.

[0059] In the above-described embodiment, when specifying the destination of the temporary position of the processing object in step S7, the worker may perform a single operation to instruct that multiple processing object positions be arranged at equal intervals, so that marks indicating the temporary positions of multiple processing objects are automatically arranged at equal intervals and displayed on the 3D model M on which the allocation section 41 is displayed.

[0060] For example, when an operator performs an operation to instruct that the temporary positions of multiple objects to be processed by the second mold be arranged at intervals d1 on the edge Fe1 of the flat portion F31, marks E1, E2, E3, etc. are displayed on the edge Fe1 at intervals d1, as shown in Figure 6.

[0061] At this time, if the allocation unit 41 acquires information on the attribute information of the metal sheet to be processed, such as information on a hole H in the flat portion F31, which is information on a location that will hinder positioning processing, the allocation unit 41 avoids this location and displays a mark indicating the provisional position of the object to be processed.

[0062] Furthermore, when the worker performs an operation to add or delete a temporary position of a processing object, the allocating unit 41 adds or deletes a mark indicating the processing object position on the display unit 20.

[0063] [Effects of the embodiment] According to the above-described embodiment, the product data generation device includes an allocation unit that allocates processing target positions on a 3D model of a product made by combining a first part and a second part, where positioning processing is performed to position the second part on the first part, and a product data generation unit that uses the 3D model to generate, as product data, an unfolded view of the first and second parts with marks added to the processing target positions allocated by the allocation unit.

[0064] This allows the product data generation device to generate product data that indicates the positions where positioning processing is to be performed for positioning parts with high accuracy through simple operations. When generating this product data, the worker can easily specify the positions where positioning processing is to be performed while checking the finished shape of the product on the 3D data of the product and the positional relationship between the sheet metal to be processed and other parts.

[0065] Furthermore, the positioning processing performed by the product data generation device on the metal sheet to be processed may be a first positioning processing that forms a ring-shaped groove on the surface of a first part and a ring-shaped protrusion that engages with the groove on the surface of a second part, or a second positioning processing that forms a cut-and-raised protrusion on the surface of the first part for abutting the second part. This allows the product data generation device to perform processing for easily and accurately positioning the metal sheets.

[0066] The product data generation device may further include a sheet metal information storage unit that stores attribute information related to the shape of the sheet metal forming the parts, and a mold information storage unit that stores restriction information including the joint shape between the first part and the second part for the parts to be processed for positioning, and the allocation unit may identify the processing target position based on the information stored in the sheet metal information storage unit and the information stored in the mold information storage unit. This allows the product data generation device to identify an appropriate processing target for each type of positioning processing and perform processing for positioning the sheet metal.

[0067] Furthermore, the allocation unit may identify multiple machining target positions at equal intervals on the 3D model while avoiding obstacles based on a single operation by the worker, thereby enabling multiple machining target positions to be identified efficiently with simple operations.

[0068] Furthermore, when specifying the processing target position for the first positioning processing, the allocation unit may switch the position for forming the ring-shaped groove and the position for forming the ring-shaped protrusion based on the operation of the worker, thereby enabling the processing target position information to be adjusted efficiently with a simple operation.

[0069] The present invention is not limited to one or more of the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0070] 1. Product data generator 10 Input section 20 Display section 30 Storage section 40 CPU 31 Product information storage section 32 Sheet metal information storage unit 33 Mold information storage unit 34 Product data storage unit 41 Allocation section 42 Product Data Generation Unit

Claims

1. an allocation unit that allocates, on a 3D model of a product produced by combining a first part and a second part, processing target positions where positioning processing for positioning the second part is performed on the first part; a product data generation unit that uses the 3D model to generate, as product data, development views of the first and second parts in which marks are added to the machining target positions allocated by the allocation unit; a sheet metal information storage unit that stores attribute information relating to the shape of the sheet metal forming the part; a mold information storage unit that stores restriction information including a joint form between the first part and the second part, The allocation unit identifies the machining target position based on the information stored in the sheet metal information storage unit and the information stored in the mold information storage unit.

2. an allocation unit that allocates, on a 3D model of a product produced by combining a first part and a second part, processing target positions where positioning processing for positioning the second part is performed on the first part; a product data generation unit that uses the 3D model to generate, as product data, development views of the first and second parts in which marks are added to the machining target positions allocated by the allocation unit, The allocation unit allocates a plurality of machining target positions at equal intervals on the 3D model while avoiding obstacles, based on a single operation by a worker.

3. 2. The product data generation device according to claim 1, wherein the positioning process is a first positioning process that forms a ring-shaped groove on the surface of the first part and a ring-shaped protrusion that engages with the groove on the surface of the second part, or a second positioning process that forms a cut-and-raised protrusion on the surface of the first part for abutting the second part.

4. an allocation unit that allocates, on a 3D model of a product produced by combining a first part and a second part, processing target positions where positioning processing for positioning the second part is performed on the first part; a product data generation unit that uses the 3D model to generate, as product data, development views of the first and second parts in which marks are added to the machining target positions allocated by the allocation unit, the positioning process is a process of forming a ring-shaped groove on a surface of the first part and a ring-shaped protrusion that engages with the groove on a surface of the second part; The allocation unit, when allocating the processing position for performing the positioning processing, swaps the position for forming a ring-shaped groove and the position for forming a ring-shaped protrusion based on the operation of the worker.

5. a product data generation device that allocates, on a 3D model of a product made by combining a first part and a second part, processing target positions where positioning processing for positioning the second part is performed on the first part, and generates, as product data, a development view of the first and second parts with marks added to the allocated processing target positions using the 3D model; storing attribute information relating to the shape of a sheet metal forming the part and storing restriction information including a joint shape between the first part and the second part; The product data generation method further comprises identifying the machining target position based on the attribute information and the restriction information.

6. A product data generation device A product data generation method comprising: allocating, on a 3D model of a product made by combining a first part and a second part, a plurality of processing positions at which positioning processing for positioning the second part on the first part is performed, at equal intervals on the 3D model while avoiding obstacles, based on a single operation by an operator; and using the 3D model, generating, as product data, an unfolded view of the first and second parts with marks added to the allocated processing positions.

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