Mold design system

Abstract

The present invention addresses the problem of providing a mold design system capable of reducing the cost of mold design. A mold design system (11) is provided with a computer (13) for storing mold data having a plurality of pieces of shape data in a storage unit (13a), and for enlarging or reducing the mold data at a desired magnification of more than 100% or less by a user. A user sets, via a display device (16), an input device (15), and the like, first shape data (30B) that is enlarged or reduced in accordance with a desired magnification with a predetermined reference point (Bo) as a reference. In addition, the mold design system (11) causes the user to set second shape data (36, 39), among the plurality of pieces of shape data, which move at a rate of 100% with reference to the predetermined reference point (Bo) or the first shape data (30B). The mold design system (11) causes the user to set, as necessary, the shape data of the affiliated parts, such as the U-groove (36) and the lift lever (39), of the second shape data, the position of which is adjusted after the movement.

Description

Technical Field

[0001] The present invention relates to a mold design system using CAD (Computer Aided Design). Background Art

[0002] Various mold design systems using CAD are in practical use (for example, see Patent Document 1 ( Figure 5 and Figure 10)).

[0003] Patent Document 1 is described based on the following figure.

[0004] Figure 8 (a) and (b) are diagrams for explaining a conventional mold design system.

[0005] like Figure 8 As shown in FIG. 1 ( a ), the mold 101 is composed of a product shape forming portion 102 that is shaped like a product shape and a mold structure portion 103 that supports the product shape forming portion 102 .

[0006] The mold structure 103 is equipped with a guide column 104 for engaging the upper mold with the lower mold, a cam 105 for bending the workpiece (a steel sheet to be processed by forming, etc., the same below), a waste cutter 106 for cutting off unnecessary parts of the workpiece, a spring 107 for making the force applied to the workpiece uniform, and other accessories.

[0007] The center of the product shape forming portion 102 is defined as a center O1 (Patent Document 1, paragraph 0044), and characteristic points P1 to P6 to P11 are indicated in the product shape forming portion 102 in a clockwise direction.

[0008] The coordinates of the product shape forming unit 102 , the mold structure unit 103 , and the attached parts are moved two-dimensionally (or three-dimensionally) based on these characteristic points P1 to P11 .

[0009] As a result, we can obtain, for example Figure 8 The new mold 201 shown in (b) is composed of a new product shape forming part 202 and a new mold structure part 203.

[0010] The mold structure 203 is provided with auxiliary parts such as a new guide pin 204 , a new cam 205 , a new scrap cutter 206 , and a new spring 207 .

[0011] That is, Patent Document 1 is a mold design system characterized in that a plurality of characteristic points are marked on a product shape forming part, and new mold structure data based on these characteristic points are automatically produced. This mold design system has the advantage that all product shape forming parts can be produced using CAD.

[0012] On the other hand, the technology of Patent Document 1 has the following disadvantages.

[0013] from Figure 8 (a) and Figure 8 As can be seen from (b), according to the technology of Patent Document 1, the new cam 205 is reduced in size at the same rate as the expansion and contraction rate of the new product shape forming portion 202 .

[0014] The new scrap cutter 206 , the new spring 207 and other accessory parts are also reduced in size at the same rate as the expansion and contraction rate of the new product shape forming part 202 .

[0015] Taking the cam as an example, the dimensions of the new cam 205 are changed in units of 1 mm or 0.1 mm relative to the cam 105 .

[0016] In order to manufacture a new cam 205 , it is necessary to prepare a new drawing in which each dimension is corrected in 1 mm units or 0.1 mm units.

[0017] That is, in addition to the drawings of the cam 105, it is necessary to prepare drawings of the new cam 205, and the production cost of the drawings increases. The same is true for the attached parts such as the new scrap cutter 206 and the new spring 207.

[0018] That is, in the technology of Patent Document 1, the cost of mold design increases.

[0019] When it is desired to reduce the manufacturing cost of a mold, a mold design system that can reduce the cost of mold design is desired.

[0020] Prior art literature

[0021] Patent Literature

[0022] Patent Document 1: Japanese Patent Application Laid-Open No. 8-287115 Summary of the invention

[0023] Problems to be solved by the invention

[0024] An object of the present invention is to provide a mold design system capable of reducing the cost of mold design.

[0025] Means for solving problems

[0026] In order to solve the above-mentioned problems, a first method provides a mold design system, which is used to design a new mold with a magnification different from the magnification of the benchmark mold when the magnification of the benchmark mold is set to 100%, and is characterized in that benchmark mold data having multiple shape data are stored, and in order to allow a user to enlarge or reduce the mold data according to a desired magnification greater than 100% or less than 100%, the user sets the first shape data among the multiple shape data that is enlarged or reduced according to the desired magnification based on a specified benchmark point, thereby having new mold data, and the user sets the second shape data among the multiple shape data that is moved according to a magnification of 100% based on the specified benchmark point or the first shape data, thereby having the new mold data, and the movement of the specified benchmark point is restricted.

[0027] Preferably, the second method is based on the first method, and the first shape data includes shape data of at least one of a workpiece receiving part, an insert and a mold structure part constituting the reference mold, and the second shape data includes shape data of an accessory part of the reference mold, and the accessory part has at least one of a cam, a waste cutter, a spring, a U-groove, a lifting rod, a positioning part and a punching punch.

[0028] Preferably, in the third mode, based on the first mode, the second shape data is a plurality of second shape data, and the user sets at least one of the plurality of second shape data as position adjustment shape data for adjusting the position after moving based on the prescribed reference point.

[0029] Preferably, in the fourth mode, based on any of the first to third modes, the reference mold data is mold data for manufacturing a multi-station stamping mold, and the specified reference point corresponds to the center of the multi-station stamping mold.

[0030] Preferably, in a fifth aspect, in addition to any of the first to third aspects, the desired magnification is within a range of more than 100% and less than 120% when enlarging, and / or within a range of more than 80% and less than 100% when reducing.

[0031] Preferably, the sixth method is based on the third method, and the position adjustment shape data is set to release the movement restriction from the position after moving with the movement amount based on the desired magnification based on the specified reference point, and then move to the adjusted position, and then move the position based on the specified reference point.

[0032] Preferably, in a seventh aspect, in addition to any one of the first to third aspects, the first shape data and the second shape data are displayed, and the second shape data is moved by enlarging or reducing the first shape data at the desired magnification.

[0033] Preferably, the eighth mode is based on the seventh mode, and in accordance with the operation of the mouse, the outer dimension frame of the reference mold data is enlarged or reduced in real time to display the outer dimension frame and the first shape data and the second shape data.

[0034] Preferably, in the 9th mode, based on any of the 1st to 3rd modes, the reference mold and the adjacent mold of the reference mold are used together for multi-station stamping, and the maximum value of the desired multiplier, that is, the maximum size of the reference mold, is limited by the configuration position of the adjacent mold.

[0035] Effects of the Invention

[0036] In the first aspect, the first shape data among the plurality of shape data constituting the reference mold data is enlarged or reduced by a magnification α times.

[0037] On the other hand, the second shape data among the plurality of shape data is neither enlarged nor reduced regardless of the magnification α. ​​That is, the second shape data among the plurality of shape data only needs to be moved, and there is no need to correct the design of each size in 1 mm units or 0.1 mm units as is required when enlarging or reducing the second shape data.

[0038] As a result, a new mold having a magnification different from that of a reference mold can be easily set by a simple operation, thereby achieving a reduction in the cost of mold design.

[0039] In addition, the benchmark mold data may, for example, include three-dimensional design data (CAD data), and the benchmark mold data may, for example, include benchmark model data that can display the shape of the benchmark mold in three dimensions through a display device.

[0040] In the second mode, accessory parts such as the cam, scrap cutter, spring, U-groove, lifting rod, positioning part and punching punch neither expand nor shrink regardless of the magnification α, and move at a magnification of 100% based on a specified reference point as the workpiece receiving part, insert and mold structure part of the mold constituting the reference expand or shrink.

[0041] That is, it is possible to reduce troublesome data input and correction during the movement of the attachment.

[0042] Furthermore, since the shapes of the attached parts such as the cam, the scrap cutter, the spring, the U-groove, the lifting rod, the positioning part and the punching punch are the same, there is no need to manufacture new attached parts. When the attached parts are made into standard parts, the attached parts can be purchased at a low price.

[0043] In the third method, during the movement of the second shape data (typically the accessory part), the workpiece receiving part, the insert part and the mold structure part are expanded or reduced. When movement based only on a specified reference point is not sufficient, the second shape data (position adjustment shape data) such as a U-groove and a lifting rod can adjust the position after the movement.

[0044] In the fourth aspect, it is possible to achieve cost reduction when designing die data for manufacturing a multi-station press die.

[0045] In the fifth method, the upper limit of the magnification α when the first shape data is enlarged is 120%, and the lower limit of the magnification α when the first shape data is reduced is 80%, thereby preventing the strength of the new mold from being reduced relative to the second shape data that is neither enlarged nor reduced regardless of the magnification α.

[0046] In the sixth aspect, the position adjustment shape data (the second shape data moved with reference to the predetermined reference point) releases the constraint with reference to the predetermined reference point, adjusts its position, and after the adjustment is completed, sets the constraint with reference to the predetermined reference point again. Thus, when the temporarily set magnification α is changed, the second shape data can be moved with reference to the predetermined reference point along with the change of the magnification α.

[0047] In the seventh aspect, the user can set the magnification α while visually checking the expansion and contraction of the first shape data and the movement of the second shape data.

[0048] In the eighth aspect, the user can set the magnification α while visually and easily confirming the operation of enlarging or reducing the outer dimensions of the reference mold data in real time in accordance with the operation of the mouse.

[0049] In the ninth aspect, the upper limit of the magnification α during enlargement, that is, the maximum size, can be restricted by the relationship with the adjacent molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a three-dimensional diagram of the lower die for trimming.

[0051] Figure 2 This is a diagram illustrating a multi-station stamping die.

[0052] Figure 3 (a) is a diagram illustrating a model mold. Figure 3 (b) is a diagram illustrating a new mold.

[0053] Figure 4 (a) is a diagram for explaining the CAD system. Figure 4 (b) is a diagram illustrating the computer constituting the CAD system.

[0054] Figure 5 This is a diagram for explaining the free expansion and contraction function.

[0055] Figure 6 This is a diagram for explaining the part movement function.

[0056] Figure 7 (a) to (c) are diagrams for explaining the movement adjustment function.

[0057] Figure 8 (a) and (b) are diagrams for explaining a conventional mold design system. DETAILED DESCRIPTION

[0058] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0059] [Example]

[0060] like Figure 1 As shown, the die 10 is, for example, a lower die 30 for trimming.

[0061] The trimming lower die 30 is composed of a workpiece receiving portion 31 that receives (or supports) the workpiece, and a die structure portion 32 that is in a horizontally long substantially rectangular shape and supports the workpiece receiving portion 31 .

[0062] The mold structure portion 32 is attached with, for example, an attachment portion 34 as described below.

[0063] The attachments 34 include a positioning portion 35 and a U-groove 36 for horizontal positioning, a cam 37 for converting vertical motion into horizontal motion, a scrap cutter 38 for cutting off unnecessary parts of the workpiece, and lifting rods 39 arranged at four corners.

[0064] like Figure 2 As shown, in the multi-station stamping, a lower die 20 for drawing, a lower die 30 for trimming, a lower die 40 for punching, and a lower die 50 for bending are sequentially arranged along the direction of travel of the workpiece. Figure 2 In the figure, adjacent dies are separated and depicted for easy observation, but it is correct that they are closely arranged in a close state. By closely arranging, all dies 20, 30, 40, 50 can be accommodated in one punching machine.

[0065] The lower drawing die 20 is used for drawing a workpiece called a blank into a product shape. By drawing, a flat plate is formed into a three-dimensionally drawn shape.

[0066] The lower drawing die 20 is a die having as its main parts a product shape forming portion 21 conforming to the shape of the product and a die structure portion 22 supporting the product shape forming portion 21 .

[0067] The mold structure part 22 has an attachment part and has a rectangular shape whose vertical and horizontal dimensions are larger than those of the product shape forming part 21 .

[0068] Hereinafter, the outer contour line (outer diameter contour line) of the product shape forming portion 21 is referred to as a profile 23. The profile 23 closely resembles the outer contour line of the product.

[0069] After the drawing process is completed, the workpiece is moved to the adjacent trimming lower die 30 by using the conveying device attached to the multi-station press machine. In parallel, the flat workpiece is put into the empty drawing lower die 20.

[0070] The trimming lower die 30 is used for trimming processing to cut off the edge of the workpiece after drawing.

[0071] The trimming lower die 30 is a die having as its main parts a workpiece receiving portion 31 and a die structure portion 32 that supports the workpiece receiving portion 31 .

[0072] The die structure 32 includes attachments (positioning portion 35 , U groove 36 , cam 37 , scrap cutter 38 , lift rod 39 ) and has a rectangular shape having a larger vertical and horizontal dimension than the workpiece receiving portion 31 .

[0073] The contour 33 of the workpiece receiving portion 31 as an outer contour closely resembles the outer contour of the product.

[0074] The edge (edge ​​material) separated from the workpiece by the trimming process is cut into a predetermined length by the scrap cutter 38 and discharged to the outside of the machine.

[0075] When the trimming process is completed, the workpiece is moved to the adjacent punching lower die 40 by a conveying device. In parallel, the drawn workpiece is put into the vacated trimming lower die 30.

[0076] The lower punching die 40 is composed of a workpiece receiving portion 41 for receiving the trimmed workpiece and a die structure portion 42 for supporting the workpiece receiving portion 41 .

[0077] The die structure 42 includes an attachment portion and has a rectangular shape whose vertical and horizontal dimensions are larger than those of the workpiece receiving portion 41 .

[0078] The punching lower die 40 is used for a hole forming process of forming a hole at a predetermined position of a workpiece using a punching punch.

[0079] The contour 43 of the workpiece receiving portion 41 is determined by the number and positions of the punching punches, and therefore the contour 43 of the punching lower die 40 is quite different from the contour 23 of the drawing lower die 20 .

[0080] When the hole drilling process is completed, the workpiece is moved to the adjacent bending lower die 50 by a conveying device. In parallel, the trimmed workpiece is put into the empty punching lower die 40.

[0081] The lower bending die 50 is composed of a workpiece receiving portion 51 for receiving the workpiece after the punching process, and a die structure portion 52 for supporting the workpiece receiving portion 51 .

[0082] The die structure 52 includes an attachment portion and has a rectangular shape whose vertical and horizontal dimensions are larger than those of the workpiece receiving portion 51 .

[0083] The lower bending die 50 is used for bending processing to bend a predetermined portion (mainly an edge) of a workpiece to form a final product shape.

[0084] The contour 53 of the workpiece receiving portion 51 is determined by the position where bending is performed and the degree of bending, and therefore the contour 53 of the lower bending die 50 is greatly different from the contour 23 of the lower drawing die 20 .

[0085] In the above description, various terms are listed.

[0086] Table 1 shows the contents of these terms in comparison with the terms of Patent Document 1 described in the prior art.

[0087]

Table 1

[0088]

[0089] The product shape forming portion of the prior art corresponds to the product shape forming portion and the workpiece receiving portion of the present invention.

[0090] In addition, the product shape forming part or the workpiece receiving part includes an embedded part such as a cutting edge or a curved edge (also called an embedded metal member or an embedded steel material).

[0091] The attachments of the prior art are a cam, a scrap cutter and a spring, while the attachments of the present invention include a U-groove, a lifting rod, a positioning portion, a punching punch and others in addition to the cam, the scrap cutter and the spring.

[0092] Figure 3 (a) is Figure 1 The bottom view of the trimming lower die 30 is shown. The horizontally long rectangular die structure 32 is divided by a plurality of ribs 32a. These divided portions serve as weight-reducing portions, so that the die structure 32 can be lightweight. Lifting rods 39 can be seen at the four corners, and U grooves 36 can be seen on the left and right.

[0093] Will Figure 3 The lower die 30 for trimming shown in (a) is renamed as base die 30B.

[0094] The horizontal dimension of the base mold 30B is BLh, the vertical dimension is BLv, the thickness of the rib 32a is Bt, the center is Bo, the diameter of the lifting rod 39 is By, and the groove width of the U groove 36 is Bu.

[0095] Here, the center Bo is set at a position 1 / 2 of BLh and 1 / 2 of BLv.

[0096] Conventionally, the center of the product shape forming portion is used as the center, but in the present invention, the center is set as the center of the mold structure portion 32. When the center of the mold structure portion 32 is set as the center, the expansion and contraction and movement on the XY plane can be performed symmetrically with the center of the mold structure portion 32 as the reference. As a result, the structural balance of the mold becomes good, and the management of the attached parts attached to the mold becomes easy.

[0097] The mold design system of the present invention can be used to design a new mold that is expanded or contracted at a predetermined expansion or contraction rate based on the base mold 30B described above.

[0098] The expansion and contraction ratio is referred to as the magnification α. ​​If the magnification α exceeds 100%, the image is expanded, and if the magnification α is less than 100%, the image is contracted.

[0099] The mold design system of the present invention is described below. Figure 3 (b) shows the new mold 30N.

[0100] exist Figure 3 In (b), the lateral dimension of the new mold 30N is set to NLh, the longitudinal dimension is set to NLv, the thickness of the rib 32a is set to Nt, the center is set to No, the diameter of the lifting rod 39 is set to Ny, and the groove width of the U groove 36 is set to Nu.

[0101] In the present invention, NLh is determined by the formula of BLh×α. Similarly, NLv is determined by the formula of BLv×α. Nt is determined by the formula of Bt×α. Similarly, the product shape forming part ( Figure 2 The mold design system of the present invention is a mold design system that creates new mold data by setting the product shape forming part to α times.

[0102] In contrast, the center No is set at a position that is 1 / 2 of NLh and 1 / 2 of NLv. That is, the position of the center is set to the center of the new mold 30N and does not change.

[0103] Furthermore, the diameters Ny and By of the lifting rod 39 are made the same, and the groove widths Nu and Bu of the U groove 36 are made the same.

[0104] If the ratio α is lower than 80%, the first shape data is reduced, but since the second shape data is not reduced, interference may occur. In addition, the rib thickness is too thin and deformation may occur, and the strength of the mold needs to be re-examined. In addition, if the ratio α exceeds 120%, the positional balance between the expanded first shape data and the unexpanded second shape data deteriorates, so the second shape data needs to be corrected. In addition, the rib spacing is too wide and there is a possibility of deflection, and the strength of the mold needs to be re-examined. Therefore, the ratio α is preferably greater than 80% and less than 120%.

[0105] When the pressing force of the punching machine is high, the magnification α is more preferably 90% to 110% in consideration of the necessity of maintaining the rib thickness and rib pitch of the die to a certain extent. This is to use the enlarged or reduced data as it is without correction and as die data.

[0106] That is, in the mold design system of the present invention, in the aforementioned Table 1, the product shape forming portion (or workpiece receiving portion) and the mold structure portion are enlarged or reduced according to the magnification α.

[0107] On the other hand, in Table 1, the attachment is neither enlarged nor reduced regardless of the magnification α.

[0108] As a result, it is easy to set Figure 3 (b) shows the new mold 30N.

[0109] Hereinafter, the mold design system of the present invention will be described in detail.

[0110] Figure 4 (a) is used to design e.g. Figure 1 The diagram is an explanatory diagram of a configuration example of a CAD system 11 (die design system) for the die 10 such as the trimming lower die 30. The configuration of the CAD system 11 can be the same as that of a known CAD system.

[0111] The CAD system 11 includes a computer 13 connected to a network 12 such as Ethernet (registered trademark), a display device 16 connected to the computer 13 , and an input device 15 such as a keyboard and a mouse.

[0112] like Figure 4 As shown in (a), the computer 13 may have, for example, an external storage device 14 or a database (mold database), which is used to store mold data of multiple molds that complete multi-station stamping and call out desired mold data from multiple mold data.

[0113] Furthermore, the computer 13 may include, for example, a graphics output device 17 that can output a drawing required for manufacturing the mold 10 based on the mold data.

[0114] Furthermore, the computer 13 may be connected to a well-known CAM (Computer Aided Manufacturing) system.

[0115] Figure 4 (b) is Figure 4 The explanatory diagram (functional block diagram) of the configuration example of the computer 13 constituting the CAD system 11 in (a) may include the same configuration as that of a known computer.

[0116] like Figure 4 As shown in (b), the computer 13 includes, for example, a storage unit 13a composed of ROM, RAM, HDD, SSD, etc., a processing unit 13b composed of CPU, MPU, etc., and an interface unit 13c such as a USB port, a display port, and an Ethernet (registered trademark) port for inputting and outputting various data and connecting various peripheral devices.

[0117] The ROM stores a program for causing the CPU or MPU to execute a predetermined operation, and the RAM can form a work area for the CPU or MPU. Furthermore, the HDD or SSD can store data required for executing a CAD application installed or set in the computer 13 or the processing unit 13b.

[0118] The CAD application may include the same functions as known CAD applications, for example, enabling the user (operator) of the CAD system 11 or the computer 13 to design shape data, which represents the structure of the object. Figure 1 The shapes of the workpiece receiving portion 31, the die structure portion 32, and the attachment portion 34 (the positioning portion 35, the U groove 36, the cam 37, the scrap cutter 38, and the lifting rod 39) of the trimming lower die 30 are shown.

[0119] That is, the processing unit 13b includes a mold design function 18 (CAD function). Specifically, the mold design function 18 can typically generate a wireframe model from multiple shape data of the mold data using feature points, line segments, curves, etc., or generate a solid model based on a three-dimensional shape such as a cuboid, cone, cylinder, sphere, torus, etc., or generate a surface model based on a wireframe, or generate a mesh model based on a three-dimensional shape, surface, entity, etc. These are examples, and the mold design function 18 is provided with well-known CAD basic functions required for designing, saving, and reading the shape data included in the mold 10.

[0120] like Figure 4As shown in (b), the processing unit 13b or the mold design function 18 may have additional functions 19 unique to the mold design system of the present invention, such as a free extension function 19a, a component movement function 19b, and a movement adjustment function 19c. The additional functions 19 supplement the known CAD basic functions or the mold design function 18.

[0121] The computer 13 or the mold design function 18 (CAD function) can read the corresponding data from the external storage device 14, for example. Figure 1 The mold data (reference mold data) corresponding to the mold 10 (reference mold) such as the lower mold 30 for trimming is saved or stored in the storage unit 13a, and the mold data stored in the storage unit 13a is displayed on the display device 16 (refer to Figure 5 ).

[0122] like Figure 5 As shown, the computer 13 or the free telescopic function 19a allows the user to select (click) using a mouse 15, for example, by a known method. Figure 1 The shape data of the lower mold 30 for trimming is used to cause the display device 16 to display an outer dimension frame 24 indicating its selected state.

[0123] Afterwards, the user can expand or reduce the shape data of the trimming lower die 30 by a known method by operating (dragging) or moving the mouse 15. At this time, the free telescopic function 19a expands or reduces the outer dimension frame 24 (preferably the shape data of the trimming lower die 30) in real time in response to the operation of the mouse 15, and displays it on the display device 16.

[0124] Here, the outer dimension frame 24 is, for example, a rectangular parallelepiped inscribed in the mold data of the mold 10 (the trimming lower mold 30 ), and the initial value of the outer dimension frame 24 is a frame indicating the volume of the reference mold or the reference mold data.

[0125] The user can enlarge or reduce the shape data of the trimming lower die 30 and determine a desired magnification by operating (dragging) the mouse 15 while viewing the display device 16. At this time, the free expansion function 19a stores the determined desired magnification in the storage unit 13a.

[0126] Alternatively, the user may input a desired magnification ratio through, for example, the keyboard 15 by a known method.

[0127] As mentioned above, Figure 2 As shown, in the multi-station stamping, the lower die 20 for drawing, the lower die 30 for trimming, the lower die 40 for punching, and the lower die 50 for bending are sequentially arranged along the advancing direction of the workpiece. Figure 1The lower die 30 for trimming has a maximum size that is determined in advance and stored in, for example, the external storage device 14 because adjacent dies are arranged adjacent to each other.

[0128] The free extension function 19a can read the maximum size data attached to the mold data from the external storage device 14 and save or store it in the storage unit 13a, and display the maximum size data (maximum size 25 of the trimming lower mold 30) stored in the storage unit 13a together with the mold data on the display device 16 (refer to Figure 5 ). The user can easily understand the maximum magnification by recognizing the displayed maximum size 25.

[0129] Preferably, the free telescopic function 19a can calculate the maximum magnification based on the maximum size data, and set an upper limit on the desired magnification so that the magnification selected or input by the user does not exceed the maximum magnification. That is, even if the user moves the mouse 15 more than necessary, the shape data of the outer dimension frame 24 and the trimming lower die 30 can be calculated in real time until the outer dimension frame 24 and the maximum size 25 are consistent.

[0130] More preferably, when the calculated maximum magnification exceeds 120%, the free telescopic function 19a may adopt 120% less than the calculated maximum magnification as the upper limit of the desired magnification α. ​​Here, 110% may be used instead of 120% as the upper limit of the desired magnification α less than the calculated maximum magnification. Similarly, it is preferred that the free telescopic function 19a may adopt 80% as the lower limit of the desired magnification α. ​​Here, 90% may be used instead of 80% as the lower limit of the desired magnification α. ​​In addition, when the upper or lower limit is exceeded, it may not work, or a warning display or alarm may be issued.

[0131] In addition, mold data or shape data can be represented by three-dimensional position coordinate data. In multi-station stamping, Z-axis position coordinate data ( Figure 3 In the figure, the coordinate data in the direction perpendicular to the paper surface can be set constant. The mold data or shape data can be represented by two-dimensional position coordinate data ( Figure 3 In the figure, coordinate data in two directions (vertical and horizontal) perpendicular to each other in a plane parallel to the paper surface) are expressed.

[0132] As mentioned above, Figure 3As shown, in the present invention, the lateral dimension NLh of the new mold 30N is determined by the formula of the lateral dimension BLh of the base mold 30B×the desired magnification α. ​​Similarly, the longitudinal dimension NLv of the new mold 30N is determined by the formula of the longitudinal dimension BLv of the base mold 30B×the desired magnification α. ​​The thickness Nt of the rib 32a is determined by the formula of the thickness Bt of the rib 32a×the desired magnification α. ​​Similarly, the product shape forming part ( Figure 2 , label 31) is set to the desired magnification α times.

[0133] In contrast, the center No (prescribed reference point) is set at a position that is 1 / 2 of NLh (X-axis position coordinate data) and 1 / 2 of NLv (Y-axis position coordinate data). That is, the position of the center (prescribed reference point) is set to the center (prescribed reference point) of the new mold 30N and does not change.

[0134] Furthermore, the diameters Ny and By of the lifting rod 39 are made the same, and the groove widths Nu and Bu of the U groove 36 are made the same.

[0135] Therefore, the free expansion and contraction function 19a can make the mold structure part 32 (first shape data) among the plurality of shape data, for example, expand (or reduce) at a desired magnification α based on a predetermined reference point (center Bo, center No), and the component movement function 19b can make the lifting rod 39 and the U groove 36 (second shape data) among the plurality of shape data, for example, move at a magnification of 100% (no expansion and no reduction) based on the first shape data (predetermined point or predetermined shape) or a predetermined reference point (center Bo, center No) (refer to Figure 6 , Figure 7 ).

[0136] Here, the free telescopic function 19a can allow the user to set in advance whether the shape data belongs to the first shape data before displaying the outer dimension frame 24 indicating the selection status of multiple shape data constituting the lower mold 30 for trimming, or it can also allow the user to additionally set whether the shape data belongs to the first shape data after displaying the outer dimension frame 24.

[0137] Similarly, the component movement function 19b can allow the user to set whether the shape data belongs to the second shape data before displaying the outer dimension frame 24 through the free retractable function 19a, or can also allow the user to additionally set whether the shape data belongs to the second shape data after displaying the outer dimension frame 24.

[0138] In addition, Figure 6In the component movement function 19b, for example, the lifting rod 39 and the U groove 36 (second shape data) can be arranged based on a specified point or a specified shape such as a characteristic point or a specific point of the mold structure part 32 (first shape data), and the movement amount of the lifting rod 39 and the U groove 36 (second shape data) can be calculated based on the movement amount of the first shape data.

[0139] Alternatively, in Figure 6 In the component movement function 19b, for example, the coordinates of the representative points (X-axis position coordinate data, Y-axis position coordinate data) of the lifting rod 39 and the U-groove 36 (the second shape data) can be enlarged (or reduced) according to the desired magnification α based on the specified reference point (center Bo, center No), and the lifting rod 39 and the U-groove 36 (the second shape data) can be restored at a magnification of 100% (no enlargement and no reduction) based on the coordinates of the enlarged (or reduced) representative points (X-axis position coordinate data × α / 2, Y-axis position coordinate data × α / 2).

[0140] Here, depending on the different parts, along with the expansion or reduction of the mold structure 32, etc., sometimes it is not enough to just move it. In this case, the position of the (representative point of) the second shape data after the movement can be adjusted. Especially in multi-station stamping, the stamping machine is provided with multiple molds and the number of mold parts is also large, so the configuration area of ​​the component is easy to occupy the entire area in the mold. Therefore, sometimes it interferes with other parts, equipment, etc.

[0141] like Figure 7 As shown in (a), the computer 13 or the component movement function 19b can calculate the movement amount based on the specified reference point (center Bo, center No) according to the desired magnification α regarding the coordinates (X-axis position coordinate data = A, Y-axis position coordinate data = B) of, for example, the lifting rod 39 and the U-groove 36 (the second shape data) or the representative point of the second shape data (or any point of the second shape data), so as to move the second shape data.

[0142] The computer 13 or the movement adjustment function 19c can allow the user to adjust the position after the movement as needed. The movement adjustment function 19c allows the user to set or select position adjustment shape data from a plurality of second shape data in order to release the constraints (position movement restrictions) of, for example, the lifting rod 39 and the U groove 36 (second shape data) or the coordinates of, for example, the representative point of the second shape data (X-axis position coordinate data = A, Y-axis position coordinate data = B) based on the specified reference point (center Bo, center No). In addition, the specified reference point (center Bo, center No) is always constrained, and the movement of its position is restricted. In addition, the specified reference point may also be a point other than the center Bo and the center No.

[0143] Afterwards, if Figure 7 (b) Figure 7 As shown in (c), the movement adjustment function 19c can adjust the position adjustment shape data (second shape data) or the coordinates of, for example, a representative point of the position adjustment shape data (X-axis position coordinate data = A, Y-axis position coordinate data = B) by a known method through the user's operation (dragging) or movement of the mouse 15, or move to the adjusted coordinates (X-axis position coordinate data = A', Y-axis position coordinate data = B'). At this time, the movement adjustment function 19c moves the entire position adjustment shape data (second shape data) or the coordinates of, for example, a representative point of the position adjustment shape data in real time in response to the operation of the mouse 15, and displays them on the display device 16. Therefore, the interference and balance state between the components can be easily recognized.

[0144] After adjusting the position or coordinates of the position adjustment shape data or its representative point, the movement adjustment function 19c can constrain the coordinates of the position adjustment shape data or its representative point (X-axis position coordinate data = A', Y-axis position coordinate data = B') by a known method through the user's operation (click) of the mouse 15 (position movement restriction of the lifting rod 39 and the U groove 36 (position adjustment shape data in the second shape data)). If constrained again, the function can be exerted by the same method during the next free extension and retraction.

[0145] In addition, the mold design system of the present invention is not limited to application Figure 2 The trimming lower die 30 shown can be applied to a multi-station press die including a drawing lower die 20 , a punching lower die 40 , and a bending lower die 50 .

[0146] Furthermore, the mold design system of the present invention can be widely applied to tandem stamping molds, continuous molds, and injection molding molds for obtaining resin molded products, in addition to multi-station stamping molds.

[0147] (Implementation Method)

[0148] For example, a person skilled in the art can also understand the following multiple embodiments.

[0149] The first embodiment is a mold design system for designing a new mold having a magnification different from that of a reference mold when the magnification of the reference mold is set to 100%, characterized in that reference mold data having a plurality of shape data is stored, and in order to allow a user to enlarge or reduce the mold data according to a desired magnification α exceeding 100% or less than 100%, the user sets a first shape data among the plurality of shape data that is enlarged or reduced according to the desired magnification α with a center reference point of a mold construction part (32) as a reference, thereby having new mold data, and the user sets a first shape data that is enlarged or reduced according to the desired magnification α with a center reference point of the mold construction part (32) as a reference, thereby having new mold data, and The second shape data among the multiple shape data is set to be moved at a magnification of 100% with respect to the center reference point so that the shape of the second shape data remains unchanged, thereby having the new mold data, the center reference point is restricted in position movement, the movement amount with respect to the center reference point as the reference is calculated according to the desired magnification α for the coordinates of the representative point of the second shape data, the first shape data and the second shape data are displayed, and the second shape data is moved by the movement amount by enlarging or reducing the first shape data according to the desired magnification α.

[0150] The second embodiment may be the mold design system of the first embodiment, characterized in that, in response to the operation of the mouse, the outer dimension frame of the reference mold data is enlarged or reduced in real time, and in response to the operation of the mouse, the coordinates of the representative point of the second shape data are calculated in real time according to the desired magnification α based on the center reference point. In response to the operation of the mouse, the outer dimension frame and the first shape data and the second shape data are displayed in real time, and the second shape data is moved in real time by the movement amount by enlarging or reducing the first shape data according to the desired magnification α.

[0151] The third embodiment may be the mold design system of the first embodiment, characterized in that the desired magnification α is in the range of more than 100% and less than 120% when expanding, and / or in the range of more than 80% and less than 100% when shrinking.

[0152] The fourth embodiment is a mold design system, which is used to design a new mold with a magnification different from the magnification of the benchmark mold when the magnification of the benchmark mold is set to 100%, characterized in that benchmark mold data having multiple shape data are stored, and in order to allow the user to enlarge or reduce the mold data according to a desired magnification α exceeding 100% or less than 100%, the user sets the first shape data among the multiple shape data that is enlarged or reduced according to the desired magnification α based on the center reference point of the mold structure part (32), thereby having new mold data, and the user sets the second shape data among the multiple shape data that is moved according to the magnification of 100% that keeps the shape of the second shape data unchanged based on the center reference point, thereby having the new mold data, the center reference point is restricted in position movement, and the desired magnification α is within the range of more than 100% and less than 120% when expanding, and / or, is within the range of more than 80% and less than 100% when reducing.

[0153] The fifth embodiment can be a mold design system of any one of the first to fourth embodiments, characterized in that the first shape data includes shape data of at least one of a workpiece receiving part, an insert and a mold structure part that constitute the reference mold, and the second shape data includes shape data of an accessory part that constitutes the reference mold, and the accessory part has at least one of a cam, a waste cutter, a spring, a U-groove, a lifting rod, a positioning part and a punching punch.

[0154] The sixth embodiment may be the mold design system of any one of the first to fourth embodiments, characterized in that the reference mold data is mold data for manufacturing a multi-station stamping mold.

[0155] The seventh embodiment can be a mold design system of any one of the first to fourth embodiments, characterized in that the reference mold and the adjacent mold of the reference mold are used together for multi-station stamping, and the maximum value of the desired multiplier, that is, the maximum size of the reference mold, is limited by the configuration position of the adjacent mold.

[0156]

Industrial Usability

[0157] The invention is suitable for the design of multi-station stamping dies.

[0158] Description of symbols

[0159] 10: mold; 11: CAD system; 12: network; 13: computer; 13a: storage unit; 13b: processing unit; 13c: interface unit; 14: storage device (external storage device, mold database); 15: input device (keyboard, mouse); 16: display device; 17: graphic output device; 18: mold design function (CAD function); 19: additional function; 19a: free extension and retraction function; 19b: component movement function; 19c: movement adjustment function; 20: lower mold for deep drawing; 21: product shape forming part; 22: mold structure; 23: profile; 24: outer dimension frame; 25: maximum size; 30: lower mold for trimming; 30B: base mold; 30N: new mold; 31: workpiece receiving part; 32: mold structure; 32a: rib; 34: Attachment; 35: Positioning portion; 36: U-groove; 37: Cam; 38: Waste cutter; 39: Lifting rod; 40: Lower die for punching; 41: Workpiece receiving portion; 42: Die structure; 43: Profile; 50: Lower die for bending; 51: Workpiece receiving portion; 52: Die structure; 53: Profile; 101: Die; 102: Product shape forming portion; 103: Die structure; 104: Guide post; 105: Cam; 106: Waste cutter; 107: Spring; 201: Die; 202: Product shape forming portion; 203: Die structure; 204: Guide post; 205: Cam; 206: Waste cutter; 207: Spring; Bo: Center; No: Center; O1: Center; P1~P11: Feature point; α: Ratio (expansion / contraction ratio).

Claims

1. A mold design system for designing a new mold having a magnification different from the magnification of a reference mold when the magnification of the reference mold is set to 100%, characterized in that: A mold data having a reference of a plurality of shape data is stored, and in order to allow a user to enlarge or reduce the mold data at a desired magnification greater than 100% or less than 100%, the user sets a first shape data enlarged or reduced at the desired magnification based on a predetermined reference point among the plurality of shape data, thereby having new mold data, and, The user is allowed to set second shape data among the plurality of shape data, which is moved at a magnification of 100% based on the predetermined reference point or the first shape data, so as to have the new mold data. The movement of the position of the predetermined reference point is restricted.

2. The mold design system according to claim 1, characterized in that: The first shape data includes shape data of at least one of a workpiece receiving portion, an insert, and a mold structure portion constituting the reference mold. The second shape data includes shape data of an attachment constituting the reference die, the attachment having at least one of a cam, a scrap cutter, a spring, a U-groove, a lift rod, a positioning portion, and a punching punch.

3. The mold design system according to claim 1, characterized in that: The second shape data is a plurality of second shape data, The user is caused to set at least one of the plurality of second shape data as position adjustment shape data for adjusting the position after the movement based on the predetermined reference point.

4. The mold design system according to any one of claims 1 to 3, characterized in that: The reference mold data is mold data for manufacturing a multi-station stamping mold. The specified reference point corresponds to the center of the multi-station stamping die.

5. The mold design system according to any one of claims 1 to 3, characterized in that: The desired magnification is within a range of more than 100% and less than 120% when enlarging, and / or within a range of more than 80% and less than 100% when reducing.

6. The mold design system according to claim 3, characterized in that: The position adjustment shape data is set so as to release the movement restriction from the position after moving by the movement amount based on the desired magnification with reference to the predetermined reference point, then move to the adjusted position, and then move the position with reference to the predetermined reference point.

7. The mold design system according to any one of claims 1 to 3, characterized in that: The first shape data and the second shape data are displayed, and the second shape data is moved by enlarging or reducing the first shape data at the desired magnification.

8. The mold design system according to claim 7, characterized in that: In response to the operation of the mouse, the outer dimension frame of the reference mold data is enlarged or reduced in real time, and the outer dimension frame and the first shape data and the second shape data are displayed.

9. The mold design system according to any one of claims 1 to 3, characterized in that: The reference die and the adjacent die to the reference die are used together for multi-station stamping, and the maximum value of the desired magnification, that is, the maximum size of the reference die is limited by the arrangement position of the adjacent die.

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