A waste knife entity modeling method, recording medium and system

Abstract

The present invention belongs to the technical field of stamping die design, and particularly relates to a method for modeling a waste cutter entity, comprising the following steps: utilizing the trimming edge curve of the waste cutter and the cutting edge curve of the waste cutter to stretch and shear to generate a waste cutter matrix; obtaining a rough mold of the waste cutter by solid subtraction below the edge, determining the chamfered edges on the horizontal and vertical surfaces by translating the trimming edge curve and the cutting edge curve of the waste cutter, obtaining a waste cutter entity digital model after chamfering, and generating a stud pin hole at the same time. The standardized design scheme of the present invention reduces the workload of waste cutter modeling design, can greatly shorten the design cycle, and is suitable for rapid modeling of waste cutters configured in groups at different positions. The present invention also provides a non-transient readable recording medium storing a waste cutter entity modeling method program and a device containing the medium, and the program can be called by a processing circuit to execute the above method.

Description

Technical Field

[0001] The invention belongs to the technical field of stamping die design, and discloses a waste cutter entity modeling method, a recording medium and a system storing a program capable of executing the method. Background Art

[0002] The stamping parts of automobile cover parts cannot be separated from the mold, and the mold is an essential tooling for stamping parts. According to the shape of the parts, the mold is generally divided into 4 to 5 processes. Except for the first step of drawing, trimming is required for the following steps. There is a scrap knife with the trimming mold. Therefore, the scrap knife design is a part design frequently used in subsequent molds. A set of molds contains multiple scrap knives installed on the bottom plate of the lower mold. The scrap knife shapes are different except for the shape of the cutting edge. The rest of the structure is roughly the same. In the past, the scrap knife design was manually designed. Each scrap knife design must go through the following steps: cutting edge line-projection line-offset stretching-cutting edge line offset-oblique stretching-cutting-cutting edge line stretching-cutting to generate cutting edge-screw hole generation-pin hole generation-surface coloring, etc. The design workload is large, and each scrap knife must repeat these steps, which takes a lot of design time. At the same time, the manual design makes the designer not understand the standard very well, resulting in different scrap knife structures, which directly affects the sliding of the waste and prolongs the quality and design cycle of the entire mold design. Summary of the invention

[0003] In view of the above problems, the present invention provides a waste cutter entity modeling method, and the specific scheme includes the following steps:

[0004] S1. Select a trimming edge curve C2 where a scrap cutter needs to be set at the edge of the part to be punched, add a cutting scrap cutter curve C1 on the vertical plane perpendicular to the edge of the part at the right end of the trimming edge curve C2, and the empty knife contour curve includes the cutting scrap cutter curve C1 and the trimming edge curve C2;

[0005] S2. Connect the two end points of the scrap cutting knife curve C1 to form a straight line L1; make a horizontal reference plane DA1 100mm lower than the lowest point PT1 on the scrap cutting knife curve C1; make a projection straight line L2 of the straight line L1 on the horizontal reference plane DA1, offset 50mm to the left horizontally and stretch 200mm upward to generate a stretched body BD1; extend the scrap cutting knife curve C1 10mm away from the tip of the knife in the tangential direction, and stretch it horizontally to form a curved surface FA1, and use the curved surface FA1 to cut off the upper part of the stretched body BD1 to form a base body BD2;

[0006] S3. Extend the empty knife contour curve 10 mm away from the knife tip along the tangent direction to generate an extended contour curve C3, move it down 15 mm and smooth it to generate a vertical chamfer edge line C4; offset it horizontally symmetrically by 5 mm and stretch it by 200 mm to generate an empty knife entity BD3, and subtract the overlapped part of the base BD2 with the empty knife entity BD3 to generate a scrap knife rough mold BD4;

[0007] S4. Shift the extended contour curve C3 horizontally to the left by 10 mm to form a horizontal chamfer edge line C5; perform a 45-degree chamfering process along the vertical chamfer edge line C4 and the horizontal chamfer edge line C5 toward the inner and lower sides of the scrap cutter rough mold BD4 to generate a scrap cutter entity digital mold BD5.

[0008] Preferably, the method further comprises the step of opening a plurality of mounting holes on the waste cutter physical digital model (BD5).

[0009] Furthermore, the method also includes the step of coloring different surfaces of a waste cutter physical digital model (BD5) having a plurality of mounting pin holes.

[0010] This solid modeling method overcomes the problem that complex curves are difficult to stretch into solids, and it is difficult to implement local removal and chamfering. It can complete automatic coloring during the modeling process, automatically generate screw fixing holes and pin positioning holes, and solve the problem of long waste knife design cycle and low efficiency.

[0011] Another embodiment of the present invention is to provide a non-transitory readable recording medium for storing one or more programs including a plurality of instructions. When the instructions are executed, the processing circuit will execute the above-mentioned waste cutter solid modeling method.

[0012] Another embodiment of the present invention is to provide a waste cutter modeling system, including a processing circuit and a memory electrically coupled thereto, wherein the memory is configured to store at least one program, wherein the program includes a plurality of instructions, and the processing circuit runs the program to execute the above-mentioned waste cutter solid modeling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of determining an empty cutter profile curve in an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of a base body is established in an embodiment of the present invention;

[0015] Figure 3 A schematic diagram of generating an empty knife entity in an embodiment of the present invention;

[0016] Figure 4 A schematic diagram of chamfering in an embodiment of the present invention;

[0017] Figure 5Schematic diagram of a waste cutter entity digital model in an embodiment of the present invention;

[0018] Figure 6 It is a schematic diagram of opening a plurality of mounting holes on a waste cutter entity digital model in an embodiment of the present invention;

[0019] In the figure: BD1 is the stretched body; BD2 is the base body; BD3 is the empty knife entity; BD4 is the scrap knife rough mold; BD5 is the scrap knife entity digital model;

[0020] FA1 is a horizontally stretched curved surface; DA1 is a horizontal reference plane;

[0021] C1 is the scrap cutting knife curve; C2 is the trimming edge curve; C3 is the extended contour curve; C4 is the vertical chamfer edge line; C5 is the horizontal chamfer edge line; L1 is a straight line;

[0022] PT1 is the lowest point on the scrap cutting knife curve C1. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making innovative efforts are within the scope of protection of the present invention.

[0024] See the following appendix to this application specification Figure 1-6 , showing the solid modeling method of the scrap knife:

[0025] Open the design software, call out the mold process structure model of the ring cloth waste knife, select a trimming edge curve C2 of about 50 mm long where the waste knife needs to be set at the edge of the part to be stamped, and add a cutting waste knife curve C1 on the vertical plane perpendicular to the edge of the part at the right end of the trimming edge curve C2. The empty knife contour curve used to design the empty knife entity BD3 includes the above-mentioned cutting waste knife curve C1 and trimming edge curve C2;

[0026] Connect the two end points of the scrap cutting knife curve C1 to form a straight line L1; make a horizontal reference plane DA1 100 mm lower than the lowest point PT1 on the scrap cutting knife curve C1; make a projection straight line L2 of the straight line L1 on the horizontal reference plane DA1, offset 50 mm horizontally to the left and stretch 200 mm upward to generate a stretched body BD1; extend the scrap cutting knife curve C1 10 mm away from the tip of the knife in the tangential direction, and stretch it horizontally to form a curved surface FA1, and use the curved surface FA1 to cut off the upper part of the stretched body BD1 to form a base body BD2;

[0027] The empty knife contour curve is extended 10mm away from the knife tip along the tangent direction to generate an extended contour curve C3, which is moved down 15mm and smoothed. This is to prepare for the chamfering later. It is inconvenient to chamfer the copied curve. In this way, the vertical surface chamfer edge line C4 is generated. The horizontal symmetry is offset by 5mm and stretched by 200mm to generate the empty knife entity BD3. The base BD2 is subtracted from the part overlapping with the empty knife entity BD3 to generate the scrap knife rough mold BD4;

[0028] The extended contour curve C3 is horizontally translated to the left by 10 mm to form a horizontal chamfered edge line C5; a 45-degree chamfer is performed along the vertical chamfered edge line C4 and the horizontal chamfered edge line C5 toward the inner and lower parts of the scrap knife rough mold BD4 to generate a scrap knife entity digital mold BD5.

[0029] Determine the number of screws according to the length of the scrap cutter. If the length of the scrap cutter is ≤190mm, use 2 screws. If the length is greater than 190mm, use 3 screws. When the length is greater than 320mm, consider dividing the scrap cutter into two. Generate screw holes and pin holes at the predetermined installation position.

[0030] Color the processed surfaces on the built model: cyan for the profile surface, yellow for the cutting edge surface, purple for the screw hole, red for the pin hole, and red for the bottom surface.

[0031] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computers, available storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0032] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0033] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0034] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0035] Compiling the above method steps into a program and then storing it on a hard disk or other non-transitory storage medium constitutes the technical solution of "a non-transitory readable recording medium" of the present invention; and electrically connecting the storage medium to a computer processor and completing the waste knife modeling through data processing constitutes the technical solution of "a waste knife modeling system" of the present invention.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste cutter entity modeling method, characterized in that The following steps are involved: S1. Select a trimming edge curve (C2) where a scrap cutter is required at the edge of the part to be punched, add a cutting scrap cutter curve (C1) on the right end of the trimming edge curve (C2) on a vertical plane perpendicular to the edge of the part, and the empty cutter contour curve includes the cutting scrap cutter curve (C1) and the trimming edge curve (C2); S2. Connect the two end points of the scrap cutting knife curve (C1) to form a straight line (L1); make a horizontal reference plane (DA1) 100 mm lower than the lowest point (PT1) on the scrap cutting knife curve (C1); make a projection straight line (L2) of the straight line (L1) on the horizontal reference plane (DA1), horizontally offset 50 mm to the left and stretch 200 mm upward to generate a stretched body (BD1); extend the scrap cutting knife curve (C1) 10 mm away from the tip of the knife in the tangential direction, and stretch it horizontally to form a curved surface (FA1), and use the curved surface (FA1) to cut off the upper part of the stretched body (BD1) to form a base body (BD2); S3. Extend the empty knife contour curve 10 mm away from the knife tip along the tangent direction to generate an extended contour curve (C3), move it down 15 mm and smooth it to generate a vertical chamfer edge line (C4); horizontally symmetrically offset 5 mm, stretch it 200 mm, generate an empty knife entity (BD3), and subtract the overlapped part of the base (BD2) with the empty knife entity (BD3) to generate a scrap knife rough mold (BD4); S4. Shift the extended contour curve (C3) horizontally to the left by 10 mm to form a horizontal chamfer edge line (C5); perform a 45-degree chamfering process along the vertical chamfer edge line (C4) and the horizontal chamfer edge line (C5) toward the inner and lower sides of the scrap cutter rough mold (BD4) to generate a scrap cutter solid digital mold (BD5).

2. A waste cutter entity modeling method according to claim 1, characterized in that: The method also includes the step of opening a plurality of mounting holes on the waste cutter physical digital model (BD5).

3. A waste cutter entity modeling method according to claim 2, characterized in that: The step also includes the step of coloring different surfaces of a waste cutter entity digital model (BD5) having a plurality of mounting pin holes.

4. A non-transitory readable recording medium for storing one or more programs including a plurality of instructions, characterized in that: When the instruction is executed, the processing circuit will be caused to execute a waste cutter solid modeling method according to any one of claims 1-3.

5. A waste cutter modeling system, comprising a processing circuit and a memory electrically coupled thereto, characterized in that: The memory configuration stores at least one program, the program includes a plurality of instructions, and the processing circuit runs the program to execute a waste cutter solid modeling method as described in any one of claims 1-3.

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