A precise stamping layout method

Abstract

The present application relates to a kind of precision stamping layout method, by the parameterization association of the thickness and tensile strength of material, establish the calculation model of lap distance, realize the accurate layout parameter matching of metal plate, improve material utilization and layout efficiency.Through the establishment of layout algorithm based on geometric symmetry, while significantly reducing the demand for manual intervention, it takes into account the dual requirements of mold life and material saving.In addition, based on the construction method of symmetric pattern library, 360 kinds of central symmetric layout combinations are generated by the discrete processing method of division interval, which provides geometric coordination guarantee for multi-cavity parts and significantly reduces the computational complexity.

Description

Technical Field

[0001] This invention relates to the field of precision stamping technology for sheet metal, and in particular to a precision stamping layout method. Background Technology

[0002] There are many possible positions and orientations for parts on sheet metal, therefore, layout is necessary. The layout method has a significant impact on material utilization, stamping processability, and the structure and lifespan of the mold.

[0003] Existing precision stamping layout relies heavily on manual experience, making it difficult to obtain accurately calculated layout schemes and resulting in low material utilization. Summary of the Invention

[0004] Therefore, a precision stamping layout method is needed to solve the technical problems of existing precision stamping layout methods, which rely heavily on manual experience, make it difficult to obtain accurate layout schemes, and result in low material utilization.

[0005] To achieve the above objectives, the present invention provides a precision stamping layout method, comprising:

[0006] S1: Determine the minimum overlap distance X between adjacent parts based on the material thickness and tensile strength;

[0007] S2: Based on the minimum overlap distance X between adjacent parts, the outline of the parts is first enlarged by 0.5X times at equal intervals, which is the layout unit pattern.

[0008] S3: Take any point in the layout unit pattern, and draw any ray R based on that point. Ray R intersects the shape of the layout unit pattern at point O. With point O as the center, draw the centrally symmetrical figure of the layout unit pattern to obtain the combined figure A.

[0009] S4: Based on the combined graphic A, determine the overlap distance Y between the part and the strip according to the thickness and tensile strength of the material;

[0010] S5: Using the minimum overlap distance X between adjacent parts, each part of the combined graphic A is expanded by Y-0.5X times in the second equal interval based on the first equal interval expansion of the shape, to obtain the layout pattern combination of the combined graphic A, namely the combined graphic B.

[0011] S6: Draw a straight line L arbitrarily from the geometric center point OB of the first equally spaced expansion of the shape of the combined graphic B, and use the straight line L as a reference to translate and copy it to both sides until the second equally spaced expansion of the shape of each part of the combined graphic B is completely between the two translated and copied straight lines L1 and L2, and take the distance between L1 and L2 as the strip width W.

[0012] S7: Translate and copy the combined graphic B along the straight line L from its original position until the first equally spaced enlarged shape of the translated combined graphic C does not intersect the first equally spaced enlarged shape of the combined graphic B for the first time. Take the distance between the geometric center point OB of the first equally spaced enlarged shape of the combined graphic B and the geometric center point OC of the first equally spaced enlarged shape of the combined graphic C as the step distance S.

[0013] S8: The final layout area = step distance S × strip width W, and the material utilization rate = part area × number of cavities / layout area.

[0014] Unlike existing technologies, the above-mentioned technical solution can scientifically and accurately calculate the layout area and material utilization rate based on the material thickness and tensile strength, thereby improving material utilization and layout efficiency. Furthermore, by establishing a layout algorithm based on geometric symmetry, it significantly reduces the need for manual intervention while simultaneously meeting the dual requirements of mold life and material conservation.

[0015] As one embodiment of the present invention, the specific steps in step S3 are as follows: different combination patterns can be obtained according to the different angles of the ray R; with each degree as one combination pattern, 360 combination patterns can be obtained.

[0016] In this way, based on each 1-degree rotation, a large amount of combined graphic data can be obtained, which in turn can yield more sample data and improve the richness of the final sorting data.

[0017] As one embodiment of the present invention, the specific steps in step S6 are as follows: different combinations can be obtained according to the different angles of the straight line L; for the combined graphic B, each degree is a combination, and 360 combinations can be obtained.

[0018] In this way, based on each 1-degree rotation, a large amount of combined data can be obtained, resulting in more sample data and improving the richness of the final sorting data.

[0019] As one embodiment of the present invention, based on each 1 degree rotation, and based on 360 combined graphics and 360 combinations, 360×360=129600 sorting areas are calculated by computer, and the sorting area of ​​the smaller combination scheme P is selected as the first preset percentage.

[0020] In this way, the optimal layout scheme can be selected from 129,600 layout areas, with the smallest layout area being the one with the lowest preset percentage. This allows users to choose the appropriate layout scheme based on the actual materials, taking into account the material utilization rate.

[0021] In one embodiment of the present invention, the initial preset percentage is 5%-20%.

[0022] Therefore, setting the initial percentage to 5%-20% is preferred to ensure a higher material utilization rate.

[0023] As one embodiment of the present invention, based on the arrangement combination scheme and the value of the step distance S, a single-step or cross-step arrangement scheme for an even number of cavities is obtained by adjusting the multiple of the step distance S and selecting different positions in the arrangement combination scheme.

[0024] Thus, the layout combination scheme and step distance S are applicable to fine blanking parts with two or more cavities. In particular, depending on the material and stamping requirements, a single-step or multi-step layout scheme can be selected, which is more flexible and can further improve the material utilization rate.

[0025] As one embodiment of the present invention, based on the smaller combination scheme P with a pre-set percentage of the sorting area, the angle is further subdivided to obtain a combination scheme with an even smaller sorting area.

[0026] In this way, based on each 1-degree rotation, the smaller combination scheme P with the previously preset percentage of the layout area can be further subdivided by angle, for example, by 0.1 degrees, to obtain a layout scheme with higher material utilization.

[0027] In one embodiment of the present invention, the tensile strength of the material is 200MPa-1200MPa.

[0028] Therefore, the preferred layout scheme is suitable for materials with tensile strength of 200MPa-1200MPa.

[0029] As one embodiment of the present invention, the specific steps in step S1 are as follows: based on the formula X1=2+1.1t,

[0030] For metallic materials with tensile strength of 300MPa-650MPa, the minimum overlap distance between adjacent parts is X = X1;

[0031] For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is X = (0.8-0.9)X1;

[0032] For high-strength materials with a tensile strength greater than 650 MPa, the minimum overlap distance between adjacent parts is X = (1.1 - 1.2)X1;

[0033] Where t is the thickness of the material, in mm.

[0034] Thus, by using different formulas to calculate the minimum overlap distance between adjacent parts based on the different tensile strengths of the materials, the material utilization rate can be significantly improved while ensuring stamping quality.

[0035] As one embodiment of the present invention, the specific steps in step S4 are as follows: based on the formula Y1 = 1.5 + 0.9t,

[0036] For metallic materials with tensile strength of 300MPa-650MPa, the overlap distance between the part and the strip is Y = Y1;

[0037] For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is Y = (0.8-0.9)Y1;

[0038] For high-strength materials with tensile strength greater than 650MPa, the minimum overlap distance between adjacent parts is Y = (1.1-1.2)Y1.

[0039] Similarly, by using the calculation formulas for the minimum overlap distance between adjacent parts corresponding to different tensile strengths of materials, material utilization can be significantly improved while ensuring stamping quality.

[0040] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0041] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0042] In the accompanying drawings of the instruction manual:

[0043] Figure 1 This is a schematic diagram of the component layout structure according to an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the structure of a layout unit pattern according to an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the structure of a combined graphic A according to an embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the structure of the combined graphic B according to an embodiment of this application;

[0047] Figure 5 A schematic diagram of the structure of obtaining the strip width W by drawing straight lines L, L1, and L2 on the combined graphic B of one embodiment of this application;

[0048] Figure 6 This is a schematic diagram of the structure of obtaining step S by combining OB of graphic B and OC of graphic C according to an embodiment of this application.

[0049] Figure 7 This is a schematic diagram of the structure of various layout schemes according to an embodiment of this application. Detailed Implementation

[0050] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0051] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0052] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0053] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0054] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0055] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0056] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0057] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0059] Existing precision stamping layout relies heavily on manual experience, making it difficult to obtain accurately calculated layout schemes and resulting in low material utilization.

[0060] Therefore, embodiments of this application provide a precision stamping layout method, including:

[0061] S1: Determine the minimum overlap distance X between adjacent parts based on the material thickness and tensile strength;

[0062] S2: Based on the minimum overlap distance X between adjacent parts, the outline of the parts is first enlarged by 0.5X times at equal intervals, which is the layout unit pattern.

[0063] S3: Take any point in the layout unit pattern, and draw any ray R based on that point. Ray R intersects the shape of the layout unit pattern at point O. With point O as the center, draw the centrally symmetrical figure of the layout unit pattern to obtain the combined figure A.

[0064] S4: Based on the combined graphic A, determine the overlap distance Y between the part and the strip according to the thickness and tensile strength of the material;

[0065] S5: Using the minimum overlap distance X between adjacent parts, each part of the combined graphic A is expanded by Y-0.5X times in the second equal interval based on the first equal interval expansion of the shape, to obtain the layout pattern combination of the combined graphic A, namely the combined graphic B.

[0066] S6: Draw a straight line L arbitrarily from the geometric center point OB of the first equally spaced expansion of the shape of the combined graphic B, and use the straight line L as a reference to translate and copy it to both sides until the second equally spaced expansion of the shape of each part of the combined graphic B is completely between the two translated and copied straight lines L1 and L2, and take the distance between L1 and L2 as the strip width W.

[0067] S7: Translate and copy the combined graphic B along the straight line L from its original position until the first equally spaced enlarged shape of the translated combined graphic C does not intersect the first equally spaced enlarged shape of the combined graphic B for the first time. Take the distance between the geometric center point OB of the first equally spaced enlarged shape of the combined graphic B and the geometric center point OC of the first equally spaced enlarged shape of the combined graphic C as the step distance S.

[0068] S8: The final layout area = step distance S × strip width W, and the material utilization rate = part area × number of cavities / layout area.

[0069] While ensuring stamping quality and die life, it effectively solves the long-standing problems of low layout efficiency and serious material waste in the field of precision stamping.

[0070] According to some embodiments of this application, please refer to Figures 1 to 7 This embodiment relates to a precision stamping layout method, including:

[0071] S1: As Figure 1 As shown, the minimum overlap distance X between adjacent parts is determined based on the material thickness and tensile strength;

[0072] S2: As Figure 2 As shown, based on the minimum overlap distance X between adjacent parts, the outline of the parts is first enlarged by 0.5X times at equal intervals, which is the layout unit pattern.

[0073] S3: As Figure 3 As shown, take any point in the layout unit pattern, and draw any ray R based on that point. Ray R intersects the shape of the layout unit pattern at point O. With point O as the center, draw the centrally symmetrical figure of the layout unit pattern to obtain the combined figure A.

[0074] S4: As Figure 1 As shown, based on the combined graphic A, the overlap distance Y between the part and the strip is determined according to the thickness and tensile strength of the material;

[0075] S5: As Figure 4 As shown, by using the minimum overlap distance X between adjacent parts, each part of the composite graphic A is expanded by Y-0.5X times in the second equal interval based on the first equal interval expansion of the shape, to obtain the layout pattern combination of composite graphic A, namely composite graphic B.

[0076] S6: As Figure 4 and Figure 5 As shown, draw a straight line L arbitrarily from the geometric center point OB of the first equally spaced expansion of the shape of the combined graphic B, and then translate and copy it to both sides based on the straight line L until the second equally spaced expansion of the shape of each part of the combined graphic B is completely between the two translated and copied straight lines L1 and L2, and take the distance between L1 and L2 as the strip width W.

[0077] S7: As Figure 6 As shown, the composite graphic B is translated and copied from its original position along the straight line L until the first equally spaced enlarged shape of the translated composite graphic C does not intersect the first equally spaced enlarged shape of the composite graphic B for the first time. The distance between the geometric center point OB of the first equally spaced enlarged shape of the composite graphic B and the geometric center point OC of the first equally spaced enlarged shape of the composite graphic C is taken as the step distance S.

[0078] S8: The final layout area = step distance S × strip width W, and the material utilization rate = part area × number of cavities / layout area.

[0079] like Figure 1 As shown, the minimum overlap distance X between adjacent parts is the minimum allowance material required between adjacent parts, and the overlap distance Y between a part and a strip is the allowance material between the part and the strip.

[0080] like Figures 2 to 6As shown in the figure, the outline marked in red (red dashed line) is the outline of the part when it is enlarged at equal intervals for the first time, and the outline marked in blue (blue double-dotted line) is the outline of the part when it is enlarged at equal intervals for the second time based on the outline when it is enlarged at equal intervals for the first time.

[0081] Unlike existing technologies, the above-mentioned technical solution can scientifically and accurately calculate the layout area and material utilization rate based on the material thickness and tensile strength, thereby improving material utilization and layout efficiency. Furthermore, by establishing a layout algorithm based on geometric symmetry, it significantly reduces the need for manual intervention while simultaneously meeting the dual requirements of mold life and material conservation.

[0082] According to some embodiments of this application, optionally, the specific steps in step S3 are as follows: different combination patterns can be obtained according to the different angles of the ray R; with each degree as one combination pattern, 360 combination patterns can be obtained.

[0083] like Figure 3 As shown, this embodiment uses 1 degree as a combined graphic and selects one angle as the combined graphic as the basic sample data. In some embodiments, even smaller degrees such as 0.1 degrees or 0.5 degrees can be used as a combined graphic to obtain more combined graphics, that is, to obtain more accurate and massive sample data.

[0084] Thus, based on each 1-degree rotation, a large amount of combined graphic data can be obtained, resulting in more sample data and improving the richness of the final layout data. Simultaneously, based on the symmetric graphic library construction method, 360 centrally symmetric layout combinations are generated through discretization processing of indexing intervals (each 1-degree interval), providing geometric compatibility guarantees for multi-cavity parts, significantly reducing computational complexity, and improving layout efficiency by 40%.

[0085] According to some embodiments of this application, optionally, the specific steps in step S6 are as follows: different combinations can be obtained depending on the angle of the straight line L; for the combined graphic B, each 1 degree is a combination, and 360 combinations can be obtained.

[0086] like Figure 4 As shown, this embodiment uses 1 degree as a combination and selects one angle as the basic sample data. In some embodiments, smaller degrees such as 0.1 degrees or 0.5 degrees can also be used as a combination to obtain more accurate and massive sample data.

[0087] In this way, based on each 1-degree rotation, a large amount of combined data can be obtained, resulting in more sample data and improving the richness of the final sorting data.

[0088] According to some embodiments of this application, optionally, based on each 1 degree rotation, and based on 360 combined graphics and 360 combinations, 360×360=129600 sorting areas are calculated by computer, and the sorting area of ​​the smaller combination scheme P is taken as the first preset percentage.

[0089] In this way, the optimal layout scheme can be selected from 129,600 layout areas, with the smallest layout area being the one with the lowest preset percentage. This allows users to choose the appropriate layout scheme based on the actual materials, taking into account the material utilization rate.

[0090] According to some embodiments of this application, optionally, the initial preset percentage is 5%-20%.

[0091] Therefore, setting the initial percentage to 5%-20% is preferable to maximize material utilization. In this embodiment, a preferred initial percentage is 15%.

[0092] According to some embodiments of this application, optionally, such as Figure 7 As shown, based on the layout combination scheme and the value of the step distance S, the single-step or cross-step layout scheme of even-numbered cavities can be obtained by adjusting the multiple of the step distance S and selecting different positions in the layout combination scheme.

[0093] like Figure 7 As shown, the single-step or multi-step nesting scheme for an even number of cavities can be 2 cavities, 4 cavities, or 6 cavities. Based on the formula Material Utilization Rate = Part Area × Number of Cavities / Nesting Area, it can be seen that, given a fixed number of cavities, different multi-step nesting schemes do not affect the nesting area. Furthermore, assuming the part area remains constant, under the same nesting scheme, the nesting area is inversely proportional to the material utilization rate; that is, the smaller the nesting area, the higher the material utilization rate.

[0094] Thus, the layout combination scheme and step distance S are applicable to fine blanking parts with two or more cavities. In particular, depending on the material and stamping requirements, a single-step or multi-step layout scheme can be selected, which is more flexible and can further improve the material utilization rate.

[0095] According to some embodiments of this application, optionally, based on the smaller arrangement area combination scheme P with a preset percentage of the arrangement area, the angles are further subdivided to obtain a smaller arrangement area combination scheme.

[0096] Discretizing the layout area calculation by performing it once per degree reduces the number of calculations required by the computer. Furthermore, to minimize the layout scheme and further reduce computation time, the top 15% of the schemes can be selected and then subdivided, for example, by performing a calculation every 0.1 degrees. A threshold for area difference can also be set; for example, calculations can stop if the area further reduced by no more than 1% after subdivision.

[0097] In this way, based on each 1-degree rotation, the smaller combination scheme P with the previously preset percentage of the layout area can be further subdivided by angle, for example, by 0.1 degrees, to obtain a layout scheme with higher material utilization.

[0098] According to some embodiments of this application, optionally, the tensile strength of the material is 200MPa-1200MPa.

[0099] Therefore, the preferred layout scheme is suitable for materials with tensile strength of 200MPa-1200MPa.

[0100] According to some embodiments of this application, optionally, the specific steps in step S1 are as follows: based on the formula X1=2+1.1t,

[0101] For metallic materials with tensile strength of 300MPa-650MPa, the minimum overlap distance between adjacent parts is X = X1;

[0102] For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is X = (0.8-0.9)X1;

[0103] For high-strength materials with a tensile strength greater than 650 MPa, the minimum overlap distance between adjacent parts is X = (1.1 - 1.2)X1;

[0104] Where t is the thickness of the material, in mm.

[0105] Thus, by using different formulas to calculate the minimum overlap distance between adjacent parts based on the different tensile strengths of the materials, the material utilization rate can be significantly improved while ensuring stamping quality.

[0106] According to some embodiments of this application, optionally, the specific steps in step S4 are as follows: based on the formula Y1 = 1.5 + 0.9t,

[0107] For metallic materials with tensile strength of 300MPa-650MPa, the overlap distance between the part and the strip is Y = Y1;

[0108] For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is Y = (0.8-0.9)Y1;

[0109] For high-strength materials with tensile strength greater than 650MPa, the minimum overlap distance between adjacent parts is Y = (1.1-1.2)Y1.

[0110] Similarly, by using the calculation formulas for the minimum overlap distance between adjacent parts corresponding to different tensile strengths of materials, material utilization can be significantly improved while ensuring stamping quality.

[0111] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of the present invention, or equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A precision stamping layout method, characterized in that, include: S1: Determine the minimum overlap distance X between adjacent parts based on the material thickness and tensile strength; S2: Based on the minimum overlap distance X between adjacent parts, the outline of the parts is first enlarged by 0.5X times at equal intervals, which is the layout unit pattern. S3: Take any point in the layout unit pattern, and draw any ray R based on that point. Ray R intersects the shape of the layout unit pattern at point O. With point O as the center, draw the centrally symmetrical figure of the layout unit pattern to obtain the combined figure A. S4: Based on the combined graphic A, determine the overlap distance Y between the part and the strip according to the thickness and tensile strength of the material; S5: Using the minimum overlap distance X between adjacent parts, each part of the combined graphic A is expanded by Y-0.5X times in the second equal interval based on the first equal interval expansion of the shape, to obtain the layout pattern combination of the combined graphic A, namely the combined graphic B. S6: Draw a straight line L arbitrarily from the geometric center point OB of the first equally spaced expansion of the shape of the combined graphic B, and use the straight line L as a reference to translate and copy it to both sides until the second equally spaced expansion of the shape of each part of the combined graphic B is completely between the two translated and copied straight lines L1 and L2, and take the distance between L1 and L2 as the strip width W. S7: Translate and copy the combined graphic B along the straight line L from its original position until the first equally spaced enlarged shape of the translated combined graphic C does not intersect the first equally spaced enlarged shape of the combined graphic B for the first time. Take the distance between the geometric center point OB of the first equally spaced enlarged shape of the combined graphic B and the geometric center point OC of the first equally spaced enlarged shape of the combined graphic C as the step distance S. S8: The final layout area = step distance S × strip width W, material utilization rate = part area × number of cavities / layout area.

2. The precision stamping layout method according to claim 1, characterized in that, The specific steps in step S3 are as follows: different combination patterns can be obtained according to the different angles of the ray R; with each degree as one combination pattern, 360 combination patterns can be obtained.

3. The precision stamping layout method according to claim 2, characterized in that, The specific steps in step S6 are as follows: different combinations can be obtained depending on the angle of the straight line L; for the combined figure B, each degree is a combination, and 360 combinations can be obtained.

4. The precision stamping layout method according to claim 3, characterized in that, Based on each 1-degree rotation, and using 360 combined graphics and 360 combinations, the computer calculates 360×360=129600 possible layout areas, and selects the smaller layout area combination scheme P from the preset percentage.

5. The precision stamping layout method according to claim 4, characterized in that, The preset percentage is 5% to 20%.

6. The precision stamping layout method according to claim 4, characterized in that, Based on the layout combination scheme and the value of the step distance S, the single-step or cross-step layout scheme of even-numbered cavities can be obtained by adjusting the multiple of the step distance S and selecting different positions in the layout combination scheme.

7. The precision stamping layout method according to claim 4 or 5, characterized in that, Based on the smaller arrangement scheme P with a pre-set percentage of the arrangement area, further subdivide the angles to obtain an arrangement scheme with an even smaller arrangement area.

8. The precision stamping layout method according to claim 1, characterized in that, The tensile strength of the material is 200MPa-1200MPa.

9. The precision stamping layout method according to claim 8, characterized in that, The specific steps in step S1 are as follows: based on the formula X1 = 2 + 1.1t, For metallic materials with tensile strength of 300MPa-650MPa, the minimum overlap distance between adjacent parts is X = X1; For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is X = (0.8-0.9)X1; For high-strength materials with a tensile strength greater than 650 MPa, the minimum overlap distance between adjacent parts is X = (1.1 - 1.2)X1; Where t is the thickness of the material, in mm.

10. The precision stamping layout method according to claim 9, characterized in that, The specific steps in step S4 are as follows: based on the formula Y1 = 1.5 + 0.9t, For metallic materials with tensile strength of 300MPa-650MPa, the overlap distance between the part and the strip is Y = Y1; For soft materials with a tensile strength of less than 300 MPa, the minimum overlap distance between adjacent parts is Y = (0.8-0.9)Y1; For high-strength materials with tensile strength greater than 650MPa, the minimum overlap distance between adjacent parts is Y = (1.1-1.2)Y1.

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