A method and system for designing a trimming blade block in an automobile stamping die

Abstract

The application discloses a kind of design method and system of trimming blade block in automobile stamping die, obtain the parameters of target trimming line and target die surface of trimming blade block in automobile stamping die;Read the parameters of actual trimming line and actual die surface of trimming blade block;According to the parameters of target trimming line and target die surface, offset processing is carried out to actual trimming line, and the data after offset processing is carried out smoothing optimization processing, and new blade edge die surface is constructed;Interference check is carried out to new blade edge die surface and target die surface, if not interference, then new blade edge die surface is used as the blade edge die surface of final forming, if interference, then the blade edge die surface of interference is segmented and removed, and the curved surface obtained after segmentation is connected, to obtain the blade edge die surface of final forming;Offset line is extracted to the blade edge die surface of final forming, offset and move are carried out to the extracted offset line to create back surface line, and the back surface of trimming blade block is constructed according to offset line and back surface line, and the data of blade edge die surface and back surface are output.

Description

Technical Field

[0001] This invention relates to the field of computer-aided design (CAD) technology, and in particular to a design method and system for trimming blade blocks in automotive stamping dies. Background Technology

[0002] The statements in this section merely refer to the background art related to this invention and do not necessarily constitute prior art.

[0003] The design and manufacturing process of automotive stamping parts mainly includes: obtaining the original curved surface model, performing stamping trimming and scrap treatment according to the stamping process, which requires stamping inserts and scrap tool inserts. After the designed inserts are reviewed and modified, the designed inserts are reprocessed by NC machining to obtain the correct NC (Numerical Control) cutting edge die surface for NC path output.

[0004] Currently, large and medium-sized mold enterprises generally spend a long time designing CNC insert trimming mold surface data, resulting in high labor intensity, high time and labor costs, and low production efficiency. This is mainly because the CNC insert trimming mold surface data undergoes review and process modification after design. After process modification, if the designed insert can no longer output the correct CNC path, manual step-by-step comparison checks, interference checks, manual removal of interference parts, manual trimming of the interference parts of the CNC model surface, and manual surface stitching repair are required. Finally, incomplete detection can lead to incorrect or inaccurate output NC paths, resulting in incorrect or low-quality products during machining. Currently, mainstream 3D CAD software lacks specific functions for CNC insert trimming mold surfaces that meet mold design requirements. Designers often use a piecemeal approach to design CNC insert trimming mold surfaces, which is not only inefficient but also makes it difficult to guarantee quality and accuracy. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a design method and system for trimming blocks in automotive stamping dies. This method features simple operation, a straightforward algorithm, and high quality and efficiency, and can well meet the design requirements of NC insert trimming die surfaces.

[0006] In a first aspect, the present invention provides a design method for a trimming tool block in an automotive stamping die;

[0007] A design method for a trimming cutter block in an automotive stamping die, comprising:

[0008] Obtain the parameters of the target trimming line and target die surface of the trimming cutter block in the automotive stamping die;

[0009] Read the parameters of the actual trimming line and the actual mold surface of the trimming tool block;

[0010] Based on the parameters of the target trimming line and the target die surface, the actual trimming line is subjected to equidistant offset processing, and the data after equidistant offset processing is smoothed and optimized to construct a new cutting edge die surface.

[0011] Interference checks are performed on the new cutting edge die surface and the target die surface. If there is no interference, the new cutting edge die surface is used as the final forming cutting edge die surface. If there is interference, the interfering cutting edge die surface is segmented and removed. The resulting curved surfaces are connected by bridging to obtain the final forming cutting edge die surface.

[0012] The offset line is extracted from the final formed cutting edge die surface. The extracted offset line is offset and moved to create the back face line. The back face of the trimming tool block is constructed based on the offset line and the back face line. The cutting edge die surface and back face data of the trimming tool block are output.

[0013] Secondly, the present invention provides a design system for trimming blade blocks in automotive stamping dies;

[0014] A design system for a trimming tool block in an automotive stamping die includes:

[0015] The acquisition module is configured to acquire the parameters of the target trimming line and the target die surface of the trimming cutter block in the automotive stamping die.

[0016] The reading module is configured to read the parameters of the actual trimming line and the actual mold surface of the trimming tool block;

[0017] The offset module is configured to: perform equidistant offset processing on the actual trimming line based on the parameters of the target trimming line and the target die surface, and perform smoothing optimization processing on the data after equidistant offset processing to construct a new cutting edge die surface;

[0018] The interference check module is configured to: perform interference check on the new cutting edge die surface and the target die surface; if there is no interference, the new cutting edge die surface is used as the final formed cutting edge die surface; if there is interference, the interfering cutting edge die surface is segmented and removed, and the resulting curved surfaces are connected by bridging to obtain the final formed cutting edge die surface.

[0019] The output module is configured to: extract offset lines from the final formed cutting edge die surface, offset and move the extracted offset lines to create back face lines, construct the back face of the trimming tool block based on the offset lines and back face lines, and output the cutting edge die surface and back face data of the trimming tool block.

[0020] Thirdly, the present invention also provides an electronic device, comprising:

[0021] Memory, used for non-transitory storage of computer-readable instructions; and

[0022] Processor, for executing the computer-readable instructions,

[0023] When the computer-readable instructions are executed by the processor, they perform the method described in the first aspect above.

[0024] Fourthly, the present invention also provides a storage medium for non-transitory storage of computer-readable instructions, wherein, when the non-transitory computer-readable instructions are executed by a computer, the instructions for the method described in the first aspect are executed.

[0025] Fifthly, the present invention also provides a computer program product, including a computer program that, when run on one or more processors, is used to implement the method described in the first aspect above.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] Regarding the input of inlay, digital model, and trimming line data, this method is applicable to various parametric surfaces and curves, including analytical surfaces and curves, B-spline surfaces and curves, NURBS surfaces and curves, and can receive surface and curve models from UG, ProE, CATIA, STEP, and IGES.

[0028] Compared to the manual step-by-step design method, this method is better suited for engineering applications. It automatically calculates the die entry amount, width, extension width, back width, and back angle of the cutting edge, thereby improving the accuracy and efficiency of the design and making it more practical.

[0029] With its simple operation, easy-to-use algorithm, high design quality and efficiency, it can well meet the needs of designing various NC insert trimming mold surface specifications. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Figure 1 This is a flowchart of the method in Example 1;

[0032] Figure 2 This is a schematic diagram of the trimming line offset in Example 1;

[0033] Figure 3 This is a schematic diagram of the smoothing process in Example 1;

[0034] Figure 4 This is a schematic diagram of the interference region in Example 1;

[0035] Figure 5 This is a schematic diagram of the cutting edge die surface segmentation and connection in Example 1;

[0036] Figure 6 This is a schematic diagram of the edge line extraction of the cutting edge die surface in Example 1;

[0037] Figure 7 This is a schematic diagram of the extraction line offset and movement in Example 1;

[0038] Figure 8 This is a schematic diagram of the back of the blade in Example 1;

[0039] Figure 9 This is a schematic diagram of the trimming and edge-trimming lines in Example 1;

[0040] Figure 10 This is a schematic diagram of the interference check in Example 1;

[0041] Figure 11 This is a schematic diagram of the equidistant division in Example 1. Detailed Implementation

[0042] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0045] All data acquisition in this embodiment is carried out in accordance with laws and regulations and with user consent, and the data is used legally.

[0046] Example 1

[0047] This embodiment provides a design method for trimming blade blocks in automotive stamping dies;

[0048] like Figure 1As shown, a design method for a trimming tool block in an automotive stamping die includes:

[0049] S101: Obtain the parameters of the target trimming line and target die surface of the trimming cutter block in the automotive stamping die;

[0050] S102: Read the parameters of the actual trimming line and actual mold surface of the trimming tool block;

[0051] S103: Based on the parameters of the target trimming line and the target mold surface, perform equidistant offset processing on the actual trimming line (e.g., ...). Figure 2 As shown), and perform smoothing optimization on the data after equidistant bias processing (such as...). Figure 3 As shown), construct a new cutting edge die surface;

[0052] S104: Perform an interference check on the new cutting edge die surface and the target die surface (e.g., Figure 4 As shown), if there is no interference, the new cutting edge die surface is used as the final forming cutting edge die surface. If there is interference, the interfering cutting edge die surface is segmented and removed. The resulting curved surfaces are then connected using a bridging method to obtain the final forming cutting edge die surface (as shown). Figure 5 (as shown);

[0053] S105: Extract the offset line for the final formed cutting edge die surface (e.g., Figure 6 As shown), the extracted bias lines are biased and moved to create backplane lines (as shown). Figure 7 As shown), construct the back side of the trimming tool block according to the offset line and the back side line (e.g. Figure 8 As shown in the figure, output the cutting edge and back face data of the trimming tool block.

[0054] This method is characterized by its simple operation, convenient algorithm, high accuracy and efficiency, and can well meet the needs of trimming die surfaces for NC trimming cutter blocks in various stamping die designs.

[0055] It should be understood that the trimming line refers to the curve to be offset when designing the trimming die surface of the trimming blade block; the trimming line is used to remove the process supplement part of the drawn part and the excess material of the blank holder flange.

[0056] It should be understood that the offset line refers to the line obtained by offsetting the curve in a certain direction.

[0057] It should be understood that the back line is the edge line of the back side of the trimming die of the trimming blade block, and the back line refers to the line used to construct the back side of the blade.

[0058] It should be understood that the die surface is the shape data of the automotive parts to be stamped.

[0059] It should be understood that the cutting edge surface refers to the cutting edge surface of the punch and die used for punching or blanking in cold stamping dies.

[0060] Further, S101: Obtain the parameters of the target trimming line and the target die surface of the trimming cutter block in the automotive stamping die;

[0061] The parameters of the target trimming line and the target die surface include: trimming line data, trimming blade block boundary line data, scrap blade line data, digital model data, and stamping direction.

[0062] The trimming line data refers to the curve data specified by the user for trimming.

[0063] The boundary line data of the trimming tool block refers to the curve data specified by the user as the boundary line of the inlay.

[0064] The scrap cutter line data refers to the curve data specified by the user as the scrap cutter for the insert.

[0065] The digital model data refers to the surface data specified by the user as the shape of the product.

[0066] The stamping direction refers to the direction of the movement during stamping.

[0067] Further, S102: Read the parameters of the actual trimming line and the actual mold surface of the trimming tool block.

[0068] Among them, the actual trimming line is the curve of the automotive parts to be stamped.

[0069] Among them, the actual die surface is the surface data of the shape of the automotive part to be stamped;

[0070] The parameters of the actual trimming and the actual die surface include: the curve of the shape of the automotive part to be stamped and the product surface data.

[0071] Based on the trimming line, read the parameter control point data of the trimming line, the curvature of each parameter control point, and the parameters expressed therein;

[0072] Based on the known shape parameters and mold input parameters, analyze the parameter control point data of the trimming line, the curvature of each parameter control point, and the parameters expressed therein.

[0073] Further, in step S103: based on the parameters of the target trimming line and the target die surface, the actual trimming line is subjected to equidistant offset processing, and the data after equidistant offset processing is smoothed and optimized to construct a new cutting edge die surface. The specific process includes:

[0074] S103-1: Use the boundary line of the trimming blade block to cut the trimming line, obtaining the trimmed trimming line (e.g., Figure 9 (as shown);

[0075] S103-2: Extract the parameter points of the trimmed edge line after trimming to obtain a point array. Apply an offset vector to the point array according to the direction of constructing the cutting edge die surface. Process the offset point array using the boundary tracking method. Reconstruct the curve using the point array. Then perform smoothing optimization on the constructed curve to obtain a smooth offset line.

[0076] S103-3: After constructing the trimming line and offset line, a ruled surface is used to create a curved surface, resulting in a new cutting edge die surface.

[0077] It should be understood that the cutting edge surface refers to the cutting surface of the trimming tool block. The boundary line is the boundary curve that constructs the surface of the trimming tool block. Parameter points are the control points that constitute the curve. The point array is used to store the coordinates of the curve control points. The boundary tracking method is the path along the boundary topology that constitutes the surface.

[0078] In step S103, the curvature of the curve is changed where the curvature is greater than a set threshold so that the curve region is smoother.

[0079] It should be understood that S103-2: Obtain the parameter division points of the curve, and move the points using a specified direction and distance. Fit the moved curve parameter control points to a curve, remove overlapping and intersecting parts, and obtain the target offset line. Use trimming lines and offset lines to create cutting edge die surface data using ruled surfaces or ribbon surfaces. According to the parameter specifications of the NC insert trimming die surface design, offset the obtained parameter control point data according to the curvature and expressed parameters of each parameter control point.

[0080] The offset processing logic is as follows: based on the trimming die surface parameters of the trimming tool block, each parameter control point is moved in a specified direction and distance. Finally, each point is connected and fitted into a curve along the path of the outermost boundary of the surface.

[0081] The smoothing optimization process involves removing duplicates and intersections from the offset fitted curves to obtain the offset line data for the cutting edge die surface.

[0082] Based on the parameter specifications of the trimming die surface of the trimming tool block, the cutting edge die surface is constructed using trimming lines and offset lines.

[0083] Further, in step S104: an interference check is performed on the new cutting edge die surface and the target die surface, wherein the specific steps of the interference check include:

[0084] Points are sampled within the curved surfaces of both the new and target die surfaces. The coordinates of any sampled point on the new die surface in the stamping direction are compared to the coordinates of any sampled point on the target die surface in the stamping direction. If they exceed each other, interference is considered present; otherwise, no interference is considered present. Figure 10 (As shown).

[0085] For the new cutting edge die surface, a regional step size method is used for sampling points and dividing the region. The coordinate data values ​​of the sampled points are used to calculate the distance to the target die surface. Based on the calculated distance, the interference region is determined. For example... Figure 11 As shown, regional step size is the process of dividing a region into several regions of equal length, with each region having a regional step size.

[0086] Based on the distance calculation data, it is determined whether the regions after the construction of the cutting edge die surface data are divided interfered with the input digital die surface. If there is interference, the interfering cutting edge region is removed, and a shape surface of the same size as the interfering cutting edge region is obtained on the shape surface of the automotive part to be stamped. The obtained shape surface of the same size and the remaining non-interfering cutting edge die surface data are connected by a bridging method to finally form a new cutting edge die surface.

[0087] If the distance in the stamping direction is greater than the tolerance (e.g., 0.01), it is considered interference.

[0088] Furthermore, the cutting edge die surface in the interference region is segmented and removed, and the resulting curved surfaces are connected by bridging to obtain the final shaped cutting edge die surface. The specific steps for segmenting and removing the interference cutting edge die surface include:

[0089] First, determine the size of the interference region data. Then, trim the surfaces within the interference region, retaining the surfaces without interference regions.

[0090] Digital model data refers to the curved surface shape of the automotive parts to be stamped.

[0091] The interference region is segmented and removed. Based on the interference region, regional digital model data is obtained. The obtained regional digital model data is then bridged to the constructed non-interference cutting edge surface data in a bridging manner, and the output cutting edge surface data is constructed sequentially.

[0092] First, determine the area of ​​interference in the digital model data. Regional digital model data includes both the interfering area and the non-interfering area.

[0093] Further, in step S105: extracting the offset line from the final formed cutting edge die surface, the specific steps include:

[0094] Identify the outermost boundary line of the final formed cutting edge die surface and use the identified outermost boundary line as the offset line.

[0095] Extract the continuous boundary line tangent to the cutting edge die surface, and find the boundary line on the same side as the offset line of the cutting edge die surface to replace the original offset line.

[0096] Furthermore, the process of biasing and shifting the extracted bias lines to create backside lines specifically includes:

[0097] According to the set width and angle, the extracted offset line is offset and moved at equal intervals to obtain the back line.

[0098] Furthermore, the construction of the back side of the trimming block based on the offset line and the back side line specifically includes:

[0099] After constructing the offset line and the blade back boundary line, a ruled surface is used to create a curved surface to obtain the blade back data.

[0100] By combining the boundary lines of the cutting edge and the back of the blade, the trimming data and the die surface data of the trimming blade block are finally formed.

[0101] Based on the parameter specifications of the NC insert trimming die surface, the tangent continuous boundary line of the cutting edge die surface is extracted. The boundary line on the same side as the offset line of the cutting edge die surface is found and replaced with the original offset line. After offsetting and moving at a specified width and angle, the back line is obtained.

[0102] Based on the parameter specifications of the NC insert trimming die surface, the offset line and back line are created using a ruled surface method to obtain the back surface data of the tool.

[0103] Output NC insert trimming die surface data that meets parameter specifications.

[0104] Example 2

[0105] This embodiment provides a design system for trimming blade blocks in automotive stamping dies;

[0106] A design system for a trimming tool block in an automotive stamping die includes:

[0107] The acquisition module is configured to acquire the parameters of the target trimming line and the target die surface of the trimming cutter block in the automotive stamping die.

[0108] The reading module is configured to read the parameters of the actual trimming line and the actual mold surface of the trimming tool block;

[0109] The offset module is configured to: perform equidistant offset processing on the actual trimming line based on the parameters of the target trimming line and the target die surface, and perform smoothing optimization processing on the data after equidistant offset processing to construct a new cutting edge die surface;

[0110] The interference check module is configured to: perform interference check on the new cutting edge die surface and the target die surface; if there is no interference, the new cutting edge die surface is used as the final formed cutting edge die surface; if there is interference, the interfering cutting edge die surface is segmented and removed, and the resulting curved surfaces are connected by bridging to obtain the final formed cutting edge die surface.

[0111] The output module is configured to: extract offset lines from the final formed cutting edge die surface, offset and move the extracted offset lines to create back face lines, construct the back face of the trimming tool block based on the offset lines and back face lines, and output the cutting edge die surface and back face data of the trimming tool block.

[0112] It should be noted that the acquisition module, reading module, bias module, interference checking module, and output module described above correspond to steps S101 to S105 in Embodiment 1. The examples and application scenarios implemented by these modules and their corresponding steps are the same, but they are not limited to the content disclosed in Embodiment 1. It should also be noted that these modules, as part of the system, can be executed in a computer system, such as a set of computer-executable instructions.

[0113] The descriptions of each embodiment in the above embodiments have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0114] The proposed system can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and the division of modules described above is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed.

[0115] Example 3

[0116] This embodiment also provides an electronic device, including: one or more processors, one or more memories, and one or more computer programs; wherein, the processor is connected to the memory, and the one or more computer programs are stored in the memory. When the electronic device is running, the processor executes the one or more computer programs stored in the memory to cause the electronic device to perform the method described in Embodiment 1.

[0117] It should be understood that in this embodiment, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0118] Memory may include read-only memory and random access memory, and provides instructions and data to the processor. A portion of memory may also include non-volatile random access memory. For example, memory may also store information about the device type.

[0119] In the implementation process, each step of the above method can be completed by the integrated logic circuits in the processor hardware or by software instructions.

[0120] The method in Embodiment 1 can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, a detailed description is not provided here.

[0121] Those skilled in the art will recognize that the units and algorithm steps described in connection with the various examples of this embodiment can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0122] Example 4

[0123] This embodiment also provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, complete the method described in Embodiment 1.

[0124] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A design method for a trimming cutter block in an automotive stamping die, characterized in that, include: Obtain the parameters of the target trimming line and target die surface of the trimming cutter block in the automotive stamping die; Read the parameters of the actual trimming line and the actual mold surface of the trimming tool block; Based on the parameters of the target trimming line and the target die surface, the actual trimming line is subjected to equidistant offset processing, and the data after equidistant offset processing is smoothed and optimized to construct a new cutting edge die surface. Interference checks are performed on the new cutting edge die surface and the target die surface. If there is no interference, the new cutting edge die surface is used as the final forming cutting edge die surface. If there is interference, the interfering cutting edge die surface is segmented and removed. The resulting curved surfaces are connected by bridging to obtain the final forming cutting edge die surface. The interference-affected cutting edge surface is segmented and removed, and the specific steps include: First, determine the size of the interference region data, and then trim the surfaces within the interference region, retaining the surfaces without interference regions; The offset line is extracted from the final formed cutting edge die surface. The extracted offset line is offset and moved to create the back face line. The back face of the trimming tool block is constructed based on the offset line and the back face line. The cutting edge die surface and back face data of the trimming tool block are output.

2. The design method of the trimming tool block in an automotive stamping die as described in claim 1, characterized in that, Based on the parameters of the target trimming line and the target die surface, the actual trimming line is subjected to equidistant offset processing, and the data after equidistant offset processing is smoothed and optimized to construct a new cutting edge die surface. The specific process includes: Use the edge trimming blade to trim the edge line to obtain the trimmed edge line; Extract the parameter points of the trimmed edge line to obtain a point array. Apply an offset vector to the point array according to the direction of constructing the cutting edge die surface. Process the offset point array using the boundary tracking method. Reconstruct the curve using the point array. Then perform smoothing optimization on the constructed curve to obtain a smooth offset line. The constructed trimming lines and offset lines are used to create curved surfaces using ruled surfaces, resulting in new cutting edge die surfaces.

3. The design method of the trimming tool block in an automotive stamping die as described in claim 1, characterized in that, Interference checks are performed on the new cutting edge die surface and the target die surface. The specific steps of the interference check include: Points are sampled in the curved areas of the new cutting edge die surface and the target die surface respectively. The coordinate value of any point on the new cutting edge die surface in the stamping direction is determined to be greater than the coordinate value of any point on the target die surface in the stamping direction. If it is greater than the coordinate value of any point on the target die surface in the stamping direction, it is determined to be interference; otherwise, it is determined to be non-interference.

4. The design method of the trimming cutter block in an automotive stamping die as described in claim 1, characterized in that, The specific steps for extracting the offset line from the final formed cutting edge die surface include: Identify the outermost boundary line of the final formed cutting edge die surface and use the identified outermost boundary line as the offset line.

5. The design method of the trimming tool block in an automotive stamping die as described in claim 1, characterized in that, The process of biasing and shifting the extracted bias lines to create backside lines specifically includes: According to the set width and angle, the extracted offset line is offset and moved at equal intervals to obtain the back line.

6. The design method of the trimming cutter block in an automotive stamping die as described in claim 1, characterized in that, The construction of the back side of the trimming tool block based on the offset line and the back side line specifically includes: After constructing the offset line and the blade back boundary line, a ruled surface is used to create a curved surface to obtain the blade back data.

7. A design system for trimming cutter blocks in automotive stamping dies, characterized in that, include: The acquisition module is configured to acquire the parameters of the target trimming line and the target die surface of the trimming cutter block in the automotive stamping die. The reading module is configured to read the parameters of the actual trimming line and the actual mold surface of the trimming tool block; The offset module is configured to: perform equidistant offset processing on the actual trimming line based on the parameters of the target trimming line and the target die surface, and perform smoothing optimization processing on the data after equidistant offset processing to construct a new cutting edge die surface; The interference check module is configured to: perform interference check on the new cutting edge die surface and the target die surface; if there is no interference, the new cutting edge die surface is used as the final formed cutting edge die surface; if there is interference, the interfering cutting edge die surface is segmented and removed, and the resulting curved surfaces are connected by bridging to obtain the final formed cutting edge die surface. The interference-affected cutting edge surface is segmented and removed, and the specific steps include: First, determine the size of the interference region data, and then trim the surfaces within the interference region, retaining the surfaces without interference regions; The output module is configured to: extract offset lines from the final formed cutting edge die surface, offset and move the extracted offset lines to create back face lines, construct the back face of the trimming tool block based on the offset lines and back face lines, and output the cutting edge die surface and back face data of the trimming tool block.

8. An electronic device, characterized in that it comprises: Memory is used to store computer-readable instructions in a non-transitory manner. as well as Processor, for executing the computer-readable instructions, When the computer-readable instructions are executed by the processor, they perform the method described in any one of claims 1-6.

9. A storage medium characterized in that it non-transitory stores computer-readable instructions, wherein, When the non-transitory computer-readable instructions are executed by a computer, the instructions of the method according to any one of claims 1-6 are executed.

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