A stamping die pressure source design method and system

Abstract

The present invention proposes a method for designing a pressure source of a stamping die, comprising the following steps: inputting a process model, obtaining all trimming lines of the process model, and determining the type of each trimming line in turn; obtaining the length of each trimming line, and calculating the number of pressure sources preset for the corresponding trimming line; obtaining the preset position of the pressure source of each trimming line according to the type of the trimming line and the number of pressure sources preset for the corresponding trimming line; according to the preset position of the pressure source of each trimming line, repeatedly checking the distance between the pressure sources on adjacent trimming lines, and adjusting the initial arrangement position of each pressure source of the process model; according to the initial arrangement position of each pressure source of the process model, performing a balance check on the pressure source of the process model, arranging the position of the pressure source based on the spatial trimming process line, and performing spatial area repeatability and balance check and adjustment on the arranged pressure source position, thereby effectively improving the quality and efficiency of the pressure source design of the stamping die trimming process line.

Description

Technical Field

[0001] The present invention relates to the technical field of mold design and development, and in particular to a stamping mold pressure source design method and system. Background Art

[0002] With the continuous development of the automotive industry, product structures are becoming more complex and changing rapidly, which places high demands on the design speed of product structures. The main function of the pressure source of the lower template in the stamping die is to provide sufficient ejection force and support force to ensure that the material can be smoothly pressed into the die and formed into the required shape during the stamping process. At the same time, it also needs to eject the formed part from the die smoothly after the stamping is completed, so as to facilitate subsequent removal and further processing.

[0003] Publication number CN203221139U discloses a stamping die for the inner panel of a rear wheel cover of an automobile, comprising an upper template, a lower template, a bottom plate, an upper template pressure source and a lower template pressure source, the upper template is slidably connected to the upper end of a punching machine frame, the lower template is connected to the bottom plate, the bottom plate is fixedly connected to the table of the punching machine frame, and the upper template and the lower template are molded together to form a cavity of the inner panel of the rear wheel cover of the automobile, the upper template pressure source is a cylinder, and the lower template pressure source is an ejection mechanism of the punch itself, the ejector rod in the ejection mechanism is pressed against the lower template through a connecting column, the upper end of the connecting column is pressed against the lower template, and the lower end of the connecting column is connected to the upper end of the ejector rod.

[0004] At present, the design of pressure sources for stamping dies mainly relies on the design experience of engineers. In the design process, in addition to considering the normal ejection of the pressure source, engineers also need to consider saving material costs and the optimal solution for the design of the pressure source position. It often takes a lot of time to verify different design schemes. Sometimes, after the mold design is completed, the mold production is hindered due to unreasonable pressure source design, thereby reducing the quality and efficiency of the pressure source design of the stamping mold. Summary of the invention

[0005] In view of this, the present invention proposes a stamping die pressure source design method and system, which can arrange the positions of the pressure sources based on the spatial trimming process line, and perform spatial area repeatability and balance inspection and adjustment on the arranged pressure source positions, thereby effectively improving the quality and efficiency of the pressure source design of the stamping die trimming process line.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a method for designing a pressure source of a stamping die, comprising the following steps:

[0007] S1, input the process model, obtain all the trimming lines of the process model, and determine the type of each trimming line in turn;

[0008] S2, obtaining the length of each trimming line and calculating the number of pressure sources preset for the corresponding trimming line;

[0009] S3, obtaining the preset position of the pressure source of each trimming line according to the type of the trimming line and the number of pressure sources preset for the corresponding trimming line;

[0010] S4, according to the preset position of the pressure source of each trimming line, repeatedly check the distance between the pressure sources on adjacent trimming lines, and adjust the initial arrangement position of each pressure source of the process model;

[0011] S5, according to the initial arrangement positions of the pressure sources of the process model, a balance check is performed on the pressure sources of the process model, and the arrangement output positions of the pressure sources of the process model are obtained by adjustment.

[0012] On the basis of the above technical solution, preferably, the process model is input in step S1, all trimming lines of the process model are obtained, and the type of each trimming line is determined in turn, which includes the following sub-steps:

[0013] S11, input process model;

[0014] S12, obtaining all trimming lines and positions of the trimming lines of the process model, and numbering the obtained trimming lines in sequence;

[0015] S13, determining the type of each trimming line in turn, wherein the trimming line type includes a closed trimming line and an open trimming line, and identifying the number of endpoints of each trimming line. If the number of endpoints of the trimming line is 0, it is a closed trimming line; if the number of endpoints of the trimming line is 2, it is an open trimming line;

[0016] S14, constructing a trimming line set, and storing the identified trimming lines into each trimming line subset according to their numbers, types and positions.

[0017] On the basis of the above technical solution, preferably, the step S2 of obtaining the length of each trimming line and calculating the number of pressure sources preset for the corresponding trimming line includes the following sub-steps:

[0018] S21, obtaining the length of each trimming line in turn;

[0019] S22, according to the type of trimming line, the corresponding length arrangement threshold and offset safety distance are preset, and it is judged in turn whether the length of each type of trimming line is greater than the preset length arrangement threshold of the corresponding type. If it is less than, it is removed from the trimming line set. If it is greater, the offset distance of the trimming line is calculated, and the calculation expression is:

[0020] C = D / 2 + A;

[0021] In the formula, C is the offset distance of the trimming line, D is the diameter of the pressure source, and A is the offset safety distance;

[0022] S23, offsetting each trimming line toward the outside according to the offset distance to obtain a pressure source arrangement curve;

[0023] S24, obtaining the discharge force of each trimming line and the elastic force of the pressure source, and calculating the number of pressure sources preset for the corresponding trimming line.

[0024] On the basis of the above technical solution, preferably, the corresponding length arrangement threshold and offset safety distance are preset according to the type of the trimming line in step S22, wherein, if the trimming line type is an open trimming line, the preset length arrangement threshold is 300mm, and the offset safety distance is 30mm; if the trimming line type is a closed trimming line, the preset length arrangement threshold is 200mm, and the offset safety distance is 20mm.

[0025] On the basis of the above technical solution, preferably, the calculation expression of the discharge force of the trimming line is:

[0026] F X =L*δ*t*6%;

[0027] In the formula, F X is the unloading force of the trimming line, L is the length of the trimming line, t is the thickness of the sheet, and δ is the shear strength of the material;

[0028] The calculation expression for the number of pressure sources preset for the trimming line is:

[0029] N y =F X / F T ;

[0030] Where N y The number of pressure sources preset for the trimming line, N y is an integer and rounded up, F T is the elastic force of the pressure source.

[0031] On the basis of the above technical solution, preferably, the preset position of the pressure source of each trimming line is obtained according to the type of trimming line and the number of pressure sources preset for the corresponding trimming line in step S3, wherein the following sub-steps are included:

[0032] S31, obtaining the length of the pressure source arrangement curve of each trimming line, and the number and type of preset pressure sources;

[0033] S32, if the trimming line type is an open trimming line, the pressure source arrangement curve of each open trimming line is equally divided according to the length of the pressure source arrangement curve and the preset number of pressure sources, and an end point position of the pressure source arrangement curve of the open trimming line is used as the pressure source arrangement starting position of the open trimming line, and the pressure sources are sequentially arranged at each equally divided point of the pressure source arrangement curve of the open trimming line;

[0034] S33. When the trimming line type is a closed trimming line, obtain the preset positions of the pressure sources for each closed trimming line according to the number of pressure sources preset for the trimming line.

[0035] Based on the above technical solutions, preferably, in step S33, obtaining the preset positions of the pressure sources for each closed trimming line according to the number of pressure sources preset for the trimming line includes:

[0036] When the number of pressure sources N preset for the trimming line y = 1, construct a first inclusion body according to the pressure source arrangement curve. The first inclusion body is tangent to the outermost endpoints on each side of the pressure source arrangement curve, and the first inclusion body is a rectangle; determine the center point of the first inclusion body according to the diagonal of the first inclusion body, obtain the position from the center point of the first inclusion body to the farthest point on the pressure source arrangement curve, and arrange the pressure source at that position;

[0037] When the number of pressure sources N preset for the trimming line y > 1, then execute the steps when the number of pressure sources N preset for the trimming line y = 1 to obtain the starting position of the pressure source arrangement; divide the pressure source arrangement curve equally according to the length of the pressure source arrangement curve and the preset number of pressure sources, and arrange the pressure sources at each equal division point of the pressure source arrangement curve in turn.

[0038] Based on the above technical solutions, preferably, in step S4, repeating the inspection of the distances between the pressure sources on adjacent trimming lines according to the preset positions of the pressure sources for each trimming line, and adjusting to obtain the initial arrangement positions of the pressure sources of the process model, including the following sub-steps:

[0039] S41. Calculate the de-duplication distance of the pressure source according to the elastic force of the pressure source. The calculation formula is:

[0040] J = J0 + a·F T ;

[0041] In the formula, J is the de-duplication distance of the pressure source, J0 is the initial distance, F T is the elastic force of the pressure source, and a is the proportional coefficient of the increase in the elastic force of the pressure source to the increase in the de-duplication distance of the pressure source;

[0042] S42. Obtain the distance E between the preset positions of the pressure sources on adjacent trimming lines, and compare it with the de-duplication distance of the pressure source in turn. If E < J, obtain the center point of the connection line between the corresponding adjacent two pressure source preset positions, remove the corresponding adjacent two pressure sources, and arrange the pressure source at the connection line center point position. If E > J, do not adjust to obtain the initial arrangement positions of the pressure sources of the process model.

[0043] On the basis of the above technical solution, preferably, according to the initial positions of the pressure sources of the process model, the pressure sources of the process model are balanced and checked, and the arrangement output positions of the pressure sources of the process model are adjusted, which includes the following steps:

[0044] S51, traversing to obtain the initial positions of the pressure sources of the process model;

[0045] S52, constructing a second containing body of the pressure source according to the initial arrangement positions of the pressure sources of the process model, wherein the side lines of the second containing body are tangent to the initial arrangement positions of the pressure sources at the farthest points on each side, and the second containing body is a rectangle;

[0046] S53, preset a balance threshold, divide the second enclosure into four quadrants according to the center point of the second enclosure, and obtain the number of pressure sources in each quadrant respectively;

[0047] S54, obtaining the maximum value of the number of pressure sources in the four quadrants, calculating the number of pressure sources in the other three quadrants and the maximum value of the number of pressure sources respectively, obtaining a first difference, and comparing the first difference with the balance threshold in sequence. If the first difference is less than the preset balance threshold, no adjustment is made, and the arrangement and determination position of each pressure source of the process model is output. If the first difference is greater than the preset balance threshold, adjustment is required, and step S55 is executed;

[0048] S55, according to the number of preset pressure sources corresponding to each trimming line, obtain the total number N of preset pressure sources for the trimming line Z , according to the initial arrangement position of each pressure source of the process model, obtain the total number N of pressure sources of the process model S , calculate the difference between the total number of preset pressure sources of the trimming line and the total number of pressure sources of the process model, and obtain the total number of adjusted pressure sources N T , the expression is: N T =N Z -N S ;

[0049] Obtain a first difference value that is less than the balance threshold, calculate the difference between each corresponding first difference value and the balance threshold value, obtain a second difference value, and sum the second differences to obtain the total pressure source replenishment amount N G ;

[0050] The total amount of pressure source to be adjusted and the total amount of pressure source supplement N G For comparison, if N T <N G When N T >N GWhen , pressure sources corresponding to the second difference value are added to the quadrant corresponding to the first difference value that is smaller than the balance threshold value for adjustment, and the arrangement of the pressure sources of the output process model is determined.

[0051] In a second aspect, the present invention further provides a stamping die pressure source design system, the system comprising:

[0052] The recognition module is used to input the process model, obtain all trimming lines of the process model, and determine the type of each trimming line in turn;

[0053] A calculation module, used to obtain the length of each trimming line and calculate the number of pressure sources preset for the corresponding trimming line;

[0054] An arrangement module, used for obtaining the preset position of the pressure source of each trimming line according to the type of the trimming line and the number of pressure sources preset for the corresponding trimming line;

[0055] The regional repeated inspection and adjustment module repeatedly inspects the distances between the pressure sources on adjacent trimming lines according to the preset positions of the pressure sources on each trimming line, and adjusts the initial arrangement positions of the pressure sources obtained in the process model;

[0056] The balance check and adjustment module is used to repeatedly check the distance between the pressure sources on adjacent trimming lines according to the preset positions of the pressure sources on each trimming line, and adjust the initial arrangement positions of the pressure sources to obtain the process model.

[0057] The stamping die pressure source design method and system of the present invention have the following beneficial effects compared with the prior art:

[0058] (1) By considering the trimming line type, length and spacing between adjacent pressure sources, the pressure source is preset and adjusted to ensure uniform distribution and balanced configuration of the pressure source in the process model, thereby improving the quality and efficiency of the pressure source design of the stamping die;

[0059] (2) The optimal pressure source arrangement scheme is automatically calculated according to the type of trimming line and the demand for pressure sources. For open trimming lines, the equal division method is used to ensure uniform distribution; for closed trimming lines, the optimal starting position is determined by the inclusion method, and the equal division method is combined to achieve uniform arrangement of multiple pressure sources. This design method can adapt to trimming lines of different shapes and sizes and different numbers and types of pressure sources, thereby improving the adaptability and flexibility of the system.

[0060] (3) Through balance checking and adjustment, it is possible to ensure that the distribution of pressure sources in the process model is more uniform, avoid local overload or idleness, and improve the overall process efficiency and stability. The automated balance checking and adjustment process reduces the need for manual intervention and improves work efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 is a flow chart of the present invention;

[0063] Figure 2 It is a schematic diagram of the trimming line of the process model of the present invention;

[0064] Figure 3 It is a schematic diagram of the pressure source arrangement curve of the open trimming line of the present invention;

[0065] Figure 4 A schematic diagram of the initial arrangement position of a single pressure source of an open trimming line of the present invention;

[0066] Figure 5 It is a schematic diagram of the pressure source arrangement curve of the closed trimming line of the present invention;

[0067] Figure 6 A schematic diagram of the initial arrangement position of a single pressure source of the closed trimming line of the present invention;

[0068] Figure 7 It is a schematic diagram of the initial arrangement position of multiple pressure sources of the trimming line of the present invention;

[0069] Figure 8 This is a schematic diagram of the initial arrangement position adjustment of the pressure source of the present invention;

[0070] Fig. 9 It is a schematic diagram of the pressure source quadrant division of the process model of the present invention. DETAILED DESCRIPTION

[0071] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] like Figure 1-9 As shown, the present invention provides a method for designing a stamping die pressure source, comprising the following steps:

[0073] S1, input the process model, obtain all the trimming lines of the process model, and determine the type of each trimming line in turn.

[0074] Step S1 includes the following sub-steps:

[0075] S11, input process model;

[0076] S12, obtaining all trimming lines and positions of the trimming lines of the process model, and numbering the obtained trimming lines in sequence;

[0077] S13, determining the type of each trimming line in turn, wherein the trimming line type includes a closed trimming line and an open trimming line, and identifying the number of endpoints of each trimming line. If the number of endpoints of the trimming line is 0, it is a closed trimming line; if the number of endpoints of the trimming line is 2, it is an open trimming line;

[0078] S14, constructing a trimming line set, and storing the identified trimming lines into each trimming line subset according to their numbers, types and positions.

[0079] It should be noted that the geometric model of the stamping is imported into the design system through the engineering design software. The geometric model contains all the shapes, sizes and position information of the stamped parts, providing a data source to be processed for subsequent steps. The built-in tools of the design system are used to automatically identify all the trimming lines in the process model. The trimming lines are the edge lines that need to be stamped, and their position information is recorded. These trimming lines are numbered from top to bottom. The number has a unique identifier, which is convenient for quick positioning and reference in subsequent steps; the type of trimming line is determined according to the number of geometric feature endpoints of the trimming line. Different types of trimming lines require different pressure source arrangements. By accurately judging the type of trimming line, a more accurate arrangement can be provided for the subsequent pressure source.

[0080] S2, obtaining the length of each trimming line and calculating the number of pressure sources preset for the corresponding trimming line.

[0081] Step S2 includes the following sub-steps:

[0082] S21, sequentially obtaining the length of each trimming line; wherein the length of each trimming line can be measured by a measuring tool of the engineering design software.

[0083] S22, according to the type of trimming line, the corresponding length arrangement threshold and offset safety distance are preset, and it is judged in turn whether the length of each type of trimming line is greater than the preset length arrangement threshold of the corresponding type. If it is less than, it is removed from the trimming line set. If it is greater, the offset distance of the trimming line is calculated, and the calculation expression is:

[0084] C = D / 2 + A;

[0085] In the formula, C is the offset distance of the trimming line, D is the diameter of the pressure source, and A is the offset safety distance;

[0086] In order to ensure that the pressure source is placed at an appropriate distance outside the trimming line, the offset distance needs to be calculated; this distance is determined by the diameter of the pressure source and the offset safety distance, which aims to avoid direct contact or interference between the pressure source and the trimming line while ensuring sufficient ejection force.

[0087] Among them, if the trimming line type is an open trimming line, the preset length layout threshold is 300mm and the offset safety distance is 30mm; if the trimming line type is a closed trimming line, the preset length layout threshold is 200mm and the offset safety distance is 20mm.

[0088] Among them, open trimming lines and closed trimming lines are different in shape, force characteristics, etc., so it is necessary to set different length arrangement thresholds and offset safety distances to more accurately control the arrangement of pressure sources to adapt to different types of trimming lines.

[0089] S23, offsetting each trimming line toward the outside according to the offset distance to obtain a pressure source arrangement curve;

[0090] The calculation expression of the unloading force of the trimming line is:

[0091] F X =L*δ*t*6%;

[0092] In the formula, F X is the unloading force of the trimming line, L is the length of the trimming line, t is the thickness of the sheet, and δ is the shear strength of the material;

[0093] S24, obtaining the discharge force of each trimming line and the elastic force of the pressure source, and calculating the number of pressure sources preset for the corresponding trimming line.

[0094] The calculation expression for the number of pressure sources preset for the trimming line is:

[0095] N y =F X / F T ;

[0096] Where N y The number of pressure sources preset for the trimming line, N y is an integer and rounded up, F T is the elastic force of the pressure source. N y Round up to ensure adequate pressure.

[0097] It should be noted that the length of the trimming line directly determines the size of the unloading force that needs to be overcome. A longer trimming line means a larger unloading area and a higher unloading force, so more pressure sources are needed to provide sufficient ejection force.

[0098] S3, obtaining preset positions of pressure sources of each trimming line according to the trimming line type and the number of preset pressure sources corresponding to the trimming line.

[0099] Step S3 includes the following sub-steps:

[0100] S31, obtaining the length of the pressure source arrangement curve of each trimming line, and the number and type of preset pressure sources;

[0101] S32, if the trimming line type is an open trimming line, the pressure source arrangement curve of each open trimming line is equally divided according to the length of the pressure source arrangement curve and the preset number of pressure sources, and an end point position of the pressure source arrangement curve of the open trimming line is used as the pressure source arrangement starting position of the open trimming line, and the pressure sources are sequentially arranged at each equally divided point of the pressure source arrangement curve of the open trimming line;

[0102] S33, if the trimming line type is a closed trimming line, obtaining preset positions of pressure sources of each closed trimming line according to the number of preset pressure sources of the trimming line.

[0103] If the number of pressure sources preset on the trimming line is N y =1, construct the first inclusion body according to the pressure source arrangement curve, the first inclusion body is tangent to the farthest points on each side of the pressure source arrangement curve, and the first inclusion body is a rectangle; determine the center point of the first inclusion body according to the diagonal line of the first inclusion body, obtain the position from the center point of the first inclusion body to the farthest point on the pressure source arrangement curve, and arrange the pressure source at its position;

[0104] If the number of pressure sources preset on the trimming line is N y >1, the number of pressure sources N preset for the trimming line is executed y = 1, obtaining the starting position of the pressure source arrangement; dividing the pressure source arrangement curve into equal parts according to the length of the pressure source arrangement curve and the preset number of pressure sources, and arranging the pressure sources in sequence at each equal point of the pressure source arrangement curve.

[0105] In this embodiment, the optimal pressure source arrangement scheme is automatically calculated according to the type of trimming line and the demand for pressure sources. For open trimming lines, the equal division method is used to ensure uniform distribution; for closed trimming lines, the optimal starting position is determined by the inclusion method, and the equal division method is combined to achieve uniform arrangement of multiple pressure sources; this design method can adapt to trimming lines of different shapes and sizes and different numbers and types of pressure source requirements, thereby improving the adaptability and flexibility of the system.

[0106] S4, according to the preset position of the pressure source of each trimming line, repeatedly check the distance between the pressure sources on adjacent trimming lines, and adjust the initial arrangement position of each pressure source of the process model;

[0107] Step S4 includes the following sub-steps:

[0108] S41, according to the elastic force of the pressure source, the pressure source de-duplication spacing is calculated, and the calculation expression is:

[0109] J = J0 + a·F T ;

[0110] Wherein, J is the deburring distance of the pressure source, J0 is the initial distance, F T is the elastic force of the pressure source, and a is the proportionality coefficient of the increase in the elastic force of the pressure source to the increase in the deburring distance of the pressure source;

[0111] Specifically, the initial distance J0 is 60 mm, and a is taken as 0.08; and when F T = 500 KG, the corresponding deburring distance J of the pressure source is 100 mm; when F T = 750 KG, the corresponding deburring distance J of the pressure source is 120 mm; when F T = 1000 KG, the corresponding deburring distance J of the pressure source is 140 mm; when F T = 1500 KG, the corresponding deburring distance J of the pressure source is 180 mm.

[0112] S42. Obtain the distance E between the preset positions of each pressure source on the adjacent trimming lines, and compare it with the deburring distance of the pressure source in turn. If E < J, obtain the center point of the connection line of the corresponding adjacent two pressure source preset positions, remove the corresponding adjacent two pressure sources, and arrange the pressure sources at the center point position of the connection line. If E > J, do not adjust, and obtain the initial arrangement positions of each pressure source of the process model.

[0113] Step S4 is to, after the pressure source arrangement on the open trimming line and the closed trimming line is completed, also perform repetitive inspection and adjustment on the pressure sources arranged on the adjacent trimming lines to ensure that they can be arranged within the limited space, reduce the unnecessary number of pressure sources, avoid unnecessary waste of pressure sources, and facilitate simplifying the process model and reducing the processing cost.

[0114] S5. According to the initial arrangement positions of each pressure source of the process model, perform a balance check on the pressure sources of the process model and adjust to obtain the arranged output positions of each pressure source of the process model.

[0115] The steps in step S5 include the following steps:

[0116] S51. Traverse to obtain the initial arrangement positions of each pressure source of the process model;

[0117] S52. According to the initial arrangement positions of each pressure source of the process model, construct a second inclusion body of the pressure source. The side line of the second inclusion body is tangent to the initial arrangement positions of the pressure sources at the outermost endpoints on each side. The second inclusion body is a rectangle;

[0118] S53. Preset a balance threshold, divide the second inclusion body into four quadrants according to the center point of the second inclusion body, and respectively obtain the number of pressure sources in each quadrant;

[0119] S54, obtaining the maximum value of the number of pressure sources in the four quadrants, calculating the number of pressure sources in the other three quadrants and the maximum value of the number of pressure sources respectively, obtaining a first difference, and comparing the first difference with the balance threshold in sequence. If the first difference is less than the preset balance threshold, no adjustment is made, and the arrangement and determination position of each pressure source of the process model is output. If the first difference is greater than the preset balance threshold, adjustment is required, and step S55 is executed;

[0120] S55, according to the number of preset pressure sources corresponding to each trimming line, obtain the total number N of preset pressure sources for the trimming line Z , according to the initial arrangement position of each pressure source of the process model, obtain the total number N of pressure sources of the process model S , calculate the difference between the total number of preset pressure sources of the trimming line and the total number of pressure sources of the process model, and obtain the total number of adjusted pressure sources N T , the expression is: N T =N Z -N S ;

[0121] Obtain a first difference value that is less than the balance threshold, calculate the difference between each corresponding first difference value and the balance threshold value, obtain a second difference value, and sum the second differences to obtain the total pressure source replenishment amount N G ;

[0122] The total amount of pressure source to be adjusted and the total amount of pressure source supplement N G For comparison, if N T <N G When N T >N G When , pressure sources corresponding to the second difference value are added to the quadrant corresponding to the first difference value that is smaller than the balance threshold value for adjustment, and the arrangement of the pressure sources of the output process model is determined.

[0123] In addition, in the quadrant where the pressure source is added, the pressure source spacing is guaranteed to be de-duplicated with the pressure sources already arranged in the quadrant, and the center coordinates of the pressure sources are guaranteed to be integers.

[0124] In this embodiment, after all repetitive pressure sources of the open trimming line and the closed trimming line are adjusted, it is also necessary to consider the stability when all pressure sources lift the product at the same time to ensure that the entire process is evenly balanced, so as to avoid product ejection deformation caused by excessive force on one side and insufficient force on the other side. Through balance inspection and adjustment, it can be ensured that the distribution of pressure sources in the process model is more even, avoiding local overload or idleness, and improving the overall process efficiency and stability. The automated balance inspection and adjustment process reduces the need for manual intervention and improves work efficiency and accuracy.

[0125] By considering the trimming line type, length and spacing between adjacent pressure sources, the pressure source can be preset and adjusted to ensure uniform distribution and balanced configuration of the pressure source in the process model, thereby improving the quality and efficiency of the pressure source design of the stamping die.

[0126] In a second aspect, the present invention further provides a stamping die pressure source design system, the system comprising:

[0127] The recognition module is used to input the process model, obtain all trimming lines of the process model, and determine the type of each trimming line in turn;

[0128] A calculation module, used to obtain the length of each trimming line and calculate the number of pressure sources arranged on the trimming line according to the length;

[0129] An arrangement module, used for obtaining the initial arrangement position of the pressure sources of each trimming line according to the type of trimming line and the number of pressure sources arranged accordingly;

[0130] The regional duplication inspection and adjustment module is used to judge and adjust the distance between the initial arrangement positions of the pressure sources on adjacent trimming lines according to the initial arrangement positions of the pressure sources on each trimming line, so as to obtain the initial arrangement positions of the pressure sources of the process model;

[0131] The balance check and adjustment module is used to make a balance judgment and adjust the pressure sources of the process model according to the initial positions of the pressure sources of the process model, so as to obtain the arrangement output positions of the pressure sources of the process model.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for designing a pressure source of a stamping die, characterized in that: It includes the following steps: S1. Input the process model, obtain all the trimming lines of the process model, and sequentially judge the types of each trimming line; S2. Obtain the length of each trimming line and calculate the number of pressure sources preset for the corresponding trimming line; S3. According to the type of the trimming line and the number of pressure sources preset for the corresponding trimming line, obtain the preset positions of the pressure sources for each trimming line; S31. Obtain the length, the number and type of the pressure sources preset for the pressure source arrangement curve of each trimming line; S32. If the type of the trimming line is an open trimming line, then equally divide according to the length of the pressure source arrangement curve of each open trimming line and the number of pressure sources preset. Take one endpoint position of the pressure source arrangement curve of the open trimming line as the starting position of the pressure source arrangement of the open trimming line, and sequentially arrange the pressure sources at each equal division point of the pressure source arrangement curve of the open trimming line; S33. If the type of the trimming line is a closed trimming line, obtain the preset positions of the pressure sources for each closed trimming line according to the number of pressure sources preset for the trimming line; S4. According to the preset positions of the pressure sources for each trimming line, repeatedly check the distances between the pressure sources on adjacent trimming lines, and adjust to obtain the initial arrangement positions of the pressure sources of the process model; S41. Calculate the de-duplication distance of the pressure source according to the elasticity of the pressure source. The calculation expression is: J=J0+a·F T ; Where J is the pressure source de-duplication spacing, J0 is the initial distance, and F T is the elastic force of the pressure source, a is the proportional coefficient of the increase in the elastic force of the pressure source to the increase in the pressure source de-weighting spacing; S42. Obtain the distance E between the preset positions of the pressure sources on adjacent trimming lines, and sequentially compare it with the de-duplication distance of the pressure source. If E < J, then obtain the center point of the connection line of the corresponding adjacent two pressure source preset positions, remove the corresponding adjacent two pressure sources, and arrange the pressure source at the center point position of the connection line. If E > J, then do not adjust to obtain the initial arrangement positions of the pressure sources of the process model; S5. According to the initial arrangement positions of the pressure sources of the process model, judge and adjust the pressure sources of the process model to obtain the determined arrangement positions of the pressure sources of the process model.

2. The method for designing a stamping die pressure source according to claim 1, characterized in that: In step S1, for the input process model, obtaining all the trimming lines of the process model, and sequentially judging the types of each trimming line, it includes the following sub-steps: S11. Input the process model; S12. Obtain all the trimming lines of the process model and the positions of each trimming line, and sequentially number the obtained trimming lines; S13. Sequentially judge the types of each trimming line. The types of the trimming line include closed trimming lines and open trimming lines. Identify the number of endpoints of each trimming line. If the number of endpoints of the trimming line is 0, it is a closed trimming line. If the number of endpoints of the trimming line is 2, it is an open trimming line; S14. Construct a trimming line set, and store the identified trimming lines into each trimming line sub-set according to their numbers, types and positions respectively.

3. The method for designing a stamping die pressure source according to claim 2, characterized in that: In step S2, for obtaining the length of each trimming line and calculating the number of pressure sources preset for the corresponding trimming line, it includes the following sub-steps: S21. Sequentially obtain the length of each trimming line; S22. Preset the corresponding length arrangement threshold and offset safety distance according to the type of the trimming line, and sequentially judge whether the length of each type of trimming line is greater than the preset length arrangement threshold of the corresponding type. If it is less, then remove it from the trimming line set. If it is greater, then calculate the offset distance of the trimming line. The calculation expression is: C = D / 2 + A; In the formula, C is the offset distance of the trimming line, D is the diameter of the pressure source, and A is the offset safety distance; S23, offsetting each trimming line toward the outside according to the offset distance to obtain a pressure source arrangement curve; S24, obtaining the discharge force of each trimming line and the elastic force of the pressure source, and calculating the number of pressure sources preset for the corresponding trimming line.

4. The method for designing a stamping die pressure source according to claim 3, characterized in that: In step S22, the corresponding length arrangement threshold and offset safety distance are preset according to the type of the trimming line, wherein, if the trimming line type is an open trimming line, the preset length arrangement threshold is 300 mm, and the offset safety distance is 30 mm; if the trimming line type is a closed trimming line, the preset length arrangement threshold is 200 mm, and the offset safety distance is 20 mm.

5. The method for designing a stamping die pressure source according to claim 4, characterized in that: The calculation expression of the discharge force of the trimming line is: F X =L*δ*t*6%; In the formula, F X is the unloading force of the trimming line, L is the length of the trimming line, t is the thickness of the sheet, and δ is the shear strength of the material; The calculation expression for the number of pressure sources preset for the trimming line is: N y =F X / F T ; Where N y The number of pressure sources preset for the trimming line, N y is an integer and rounded up, F T is the elastic force of the pressure source.

6. The method for designing a stamping die pressure source according to claim 1, characterized in that: The step S33 obtains the preset positions of the pressure sources of each closed trimming line according to the preset number of pressure sources of the trimming line, which includes: If the number of pressure sources preset on the trimming line is N y =1, construct the first inclusion body according to the pressure source arrangement curve, the first inclusion body is tangent to the farthest points on each side of the pressure source arrangement curve, and the first inclusion body is a rectangle; determine the center point of the first inclusion body according to the diagonal line of the first inclusion body, obtain the position from the center point of the first inclusion body to the farthest point on the pressure source arrangement curve, and arrange the pressure source at its position; If the number of pressure sources preset on the trimming line is N y >1, the number of pressure sources N preset for the trimming line is executed y = 1, obtaining the starting position of the pressure source arrangement; dividing the pressure source arrangement curve into equal parts according to the length of the pressure source arrangement curve and the preset number of pressure sources, and arranging the pressure sources in sequence at each equal point of the pressure source arrangement curve.

7. The method for designing a stamping die pressure source according to claim 1, characterized in that: According to the initial positions of the pressure sources of the process model, the pressure sources of the process model are checked for balance, and the arrangement output positions of the pressure sources of the process model are adjusted to obtain the pressure sources of the process model, which includes the following steps: S51, traversing to obtain the initial positions of the pressure sources of the process model; S52, constructing a second containing body of the pressure source according to the initial arrangement positions of the pressure sources of the process model, wherein the side lines of the second containing body are tangent to the initial arrangement positions of the pressure sources at the farthest points on each side, and the second containing body is a rectangle; S53, preset a balance threshold, divide the second enclosure into four quadrants according to the center point of the second enclosure, and obtain the number of pressure sources in each quadrant respectively; S54, obtaining the maximum value of the number of pressure sources in the four quadrants, calculating the number of pressure sources in the other three quadrants and the maximum value of the number of pressure sources respectively, obtaining a first difference, and comparing the first difference with the balance threshold in sequence. If the first difference is less than the preset balance threshold, no adjustment is made, and the arrangement and determination position of each pressure source of the process model is output. If the first difference is greater than the preset balance threshold, adjustment is required, and step S55 is executed; S55, according to the number of preset pressure sources corresponding to each trimming line, obtain the total number N of preset pressure sources for the trimming line Z , according to the initial arrangement position of each pressure source of the process model, obtain the total number N of pressure sources of the process model S , calculate the difference between the total number of preset pressure sources of the trimming line and the total number of pressure sources of the process model, and obtain the total number of adjusted pressure sources N T , the expression is: N T =N Z -N S ; Obtain a first difference value that is less than the balance threshold, calculate the difference between each corresponding first difference value and the balance threshold value, obtain a second difference value, and sum the second differences to obtain the total pressure source replenishment amount N G ; The total amount of pressure source to be adjusted and the total amount of pressure source supplement N G For comparison, if N T <N G When N T >N G When , pressure sources corresponding to the second difference value are added to the quadrant corresponding to the first difference value that is smaller than the balance threshold value for adjustment, and the arrangement of the pressure sources of the output process model is determined.

8. A stamping die pressure source design system, characterized in that: The system comprises: The recognition module is used to input the process model, obtain all trimming lines of the process model, and determine the type of each trimming line in turn; A calculation module, used to obtain the length of each trimming line and calculate the number of pressure sources preset for the corresponding trimming line; An arrangement module, used for obtaining the preset position of the pressure source of each trimming line according to the type of the trimming line and the number of pressure sources preset for the corresponding trimming line; The length, preset number and type of pressure sources of each trimming line are obtained; if the trimming line type is an open trimming line, the pressure source arrangement curve of each open trimming line is equally divided according to the length and preset number of pressure sources, and the position of one end point of the pressure source arrangement curve of the open trimming line is used as the starting position of the pressure source arrangement of the open trimming line, and the pressure sources are sequentially arranged at each equally divided point of the pressure source arrangement curve of the open trimming line; if the trimming line type is a closed trimming line, the preset position of the pressure source of each closed trimming line is obtained according to the preset number of pressure sources of the trimming line; The area duplication check and adjustment module repeats the check on the distances between the pressure sources on adjacent trimming lines according to the preset positions of the pressure sources on each trimming line, and adjusts to obtain the initial arrangement positions of the pressure sources of the process model; Calculate the duplicate removal distance of the pressure source according to the elastic force of the pressure source, and the calculation expression is: J=J0+a·F T ; Where J is the pressure source de-duplication spacing, J0 is the initial distance, and F T is the elastic force of the pressure source, a is the proportional coefficient of the increase in the elastic force of the pressure source to the increase in the pressure source de-weighting spacing; Obtain the distance E between the preset positions of the pressure sources on adjacent trimming lines, and compare it with the duplicate removal distance of the pressure source in turn. If E < J, obtain the center point of the connection line of the corresponding adjacent two pressure source preset positions, remove the corresponding adjacent two pressure sources, and arrange the pressure sources at the center point position of the connection line. If E > J, no adjustment is made, and the initial arrangement positions of the pressure sources of the process model are obtained; The balance check and adjustment module is used to repeat the check on the distances between the pressure sources on adjacent trimming lines according to the preset positions of the pressure sources on each trimming line, and adjust to obtain the initial arrangement positions of the pressure sources of the process model.

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