A cold stamping method of a triangular workpiece

Abstract

The application discloses a kind of cold stamping processing methods of triangular workpiece, belong to workpiece stamping technical field.It steps as follows: preparation: blank is positioned by side edge positioning column, blank front end is abutted on initial positioning column, stamping triangular workpiece;Blank is turned over 180 degrees, blank is positioned by side edge positioning column, blank front end is abutted on step positioning pin, stamping triangular workpiece;Blank is turned over 180 degrees, blank is positioned by side edge positioning column, blank front end is abutted on initial positioning column, stamping triangular workpiece;Blank is turned over 180 degrees, blank is positioned by side edge positioning column, blank front end is abutted on step positioning pin, stamping triangular workpiece;Stamping is finished.The application is stamped by blank turning over, makes full use of blank, reduces raw material waste, can stamp more stamping parts on original sheet, greatly improves the utilization of sheet, reduces manufacturing cost.

Description

Technical Field

[0001] This invention relates to a cold stamping method for triangular workpieces, belonging to the field of workpiece stamping technology. Background Technology

[0002] Triangular workpieces are a common shape in industry, such as the intake plate on an air compressor valve plate, and protective plates are also triangular. Stamping is a metal processing method widely used in the processing of thin metal sheets. It typically uses sheet metal as the blank and a stamping machine to stamp the required parts.

[0003] The existing production process for such triangular workpieces is as follows: first, prepare a strip of sheet material as blank 1, such as... Figure 7 As shown, the width of the strip plate is determined by the side length and width of the triangular workpiece plus the overlap of the two sides, with a certain distance reserved between adjacent triangular workpieces; then, the blank workpiece is stamped out on a stamping press; and then the blank workpiece is processed into the desired finished product through machining processes such as polishing and edge grinding.

[0004] The above processing method is commonly used in the industry. Its disadvantages are low material utilization and high manufacturing cost of triangular workpieces. Taking triangular workpieces as an example, ignoring stamping edge waste, there is significant material waste at the vertex of the triangular workpiece. Using existing stamping processes, the wasted raw material is equivalent to the area of ​​the finished product that can be obtained, that is, the material utilization rate is about 50%, which is also an important reason for the high cost of stamped parts. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a cold stamping method for triangular workpieces.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a cold stamping processing method for a triangular workpiece, including a stamping machine, the stamping machine being provided with a punch for processing the triangular workpiece, the stamping machine also being provided with a stamping platform, the stamping platform being provided with an initial positioning post, a step positioning pin and a plurality of side positioning posts, the initial positioning post being a telescopic structure, and the step positioning pin being located in front of the initial positioning post; The processing steps are as follows: S1. Material preparation: Based on the height of the triangular workpiece plus the width of the two overlapping sides, the width of the strip is taken as the width of the strip, and the length of the strip is taken as L, and the blank is cut. S2. Position both sides of the blank using side positioning posts, so that the front end of the blank abuts against the initial positioning post and stamps to form the first triangular workpiece. Then move the blank forward according to the agreed step distance, so that the position of the third triangular workpiece of the blank is moved to the bottom of the punch and stamps to form the third triangular workpiece. Repeat the above process until the blank of L / 2 is stamped. S3. Flip the blank after S2 stamping 180 degrees and position both sides of the blank using side positioning pins. Place the front end of the blank against the pitch positioning pin and stamp to form the second triangular workpiece. Then move the blank forward according to the agreed pitch so that the position of the fourth triangular workpiece is below the punch and stamp to form the fourth triangular workpiece. Repeat the above process until the blank of L / 2 is stamped. S4. Turn the blank after S3 around and rotate it 180 degrees. Position both sides of the blank using the side positioning posts, so that the front end of the blank abuts against the initial positioning post. Stamp to form the Nth triangular workpiece. Then move the blank forward according to the agreed step distance, so that the position of the N-2th triangular workpiece is moved below the punch. Stamp to form the N-2th triangular workpiece. Repeat the above process until the remaining L / 2 blank is stamped. S5. Flip the blank after S4 stamping 180 degrees and position both sides of the blank using side positioning pins. Place the front end of the blank against the pitch positioning pin and stamp to form the (N-1)th triangular workpiece. Then move the blank forward according to the agreed pitch so that the position of the (N-3)th triangular workpiece is moved below the punch and stamped to form the (N-3)th triangular workpiece. Repeat the above process until the blank stamping is completed. S6, stamping ends.

[0007] The beneficial effects of this invention are as follows: Using the above processing method, a single punch is used to punch one triangular workpiece at a time. When punching the next product, the blank is manually fed forward according to a predetermined step distance. Once in place, the next triangular workpiece is punched. The blank flipping during punching saves material, allowing for full utilization of the blank during the punching process and minimizing material waste. This enables the punching of more triangular workpieces from the original sheet metal, significantly improving material utilization to over 90%. This greatly reduces raw material waste and substantially lowers the manufacturing cost of triangular workpieces. During feeding, one end of the blank needs to be manually held while the other end is fed into the punching platform. Turning the blank around makes manual feeding more convenient and ensures operator safety.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the blank will form a triangular cavity after being stamped into a triangular workpiece. A positioning point is provided on the triangular cavity. The positioning point is located on the side opposite the vertex of the triangular cavity that is close to the next stamped triangular workpiece. The distance between the positioning point and the step positioning pin is the agreed step distance.

[0010] The beneficial effect of adopting the above-mentioned further solution is that, under the action of the stamping machine, a triangular cavity will be formed on the blank after the triangular workpiece is stamped. There is a positioning point on the side of the triangular cavity near the vertex of the next stamped triangular workpiece. By making full use of this positioning point, the positioning point is moved to the abutment position of the pitch positioning pin. The blank is positioned by the pitch positioning pin, and with the positioning of the side positioning posts on both sides, the position of the next triangular workpiece to be stamped can be accurately positioned. The position of the next triangular workpiece to be stamped is accurately moved to the bottom of the punch, making full use of the triangular cavity after the previous stamping to position the next triangular workpiece to be stamped. This ensures the accuracy of the stamping position of each triangular workpiece, meets the stamping quality requirements of the triangular workpiece, makes full use of the blank, and reduces material waste.

[0011] Furthermore, the width of the overlap is 1 to 2 times the thickness of the blank.

[0012] The beneficial effect of adopting the above-mentioned further solution is that, by controlling the overlap width to be 1 to 2 times the blank thickness, the material flow during the stamping process can be further optimized, ensuring that the material can be evenly distributed when stamping triangular workpieces, reducing waste caused by uneven material flow. This not only meets the quality requirements of stamped parts, but also further improves the utilization rate of sheet metal, maximizing the saving of raw material costs.

[0013] Furthermore, the length L of the blank is 0.5 meters to 1.5 meters.

[0014] The advantage of adopting the above-mentioned further solution is that by setting the length L of the blank in the range of 0.5 meters to 1.5 meters, it is possible to better adapt to the production needs of triangular workpieces of different sizes.

[0015] Furthermore, the initial positioning post is set on the stamping platform by a telescopic spring.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the initial positioning post uses a telescopic spring to meet the telescopic requirements of the initial positioning post. When it is necessary to position the blank through the initial positioning post, the blank can be positioned by the extended initial positioning post. When it is necessary to position the reverse side of the blank, the initial positioning post should not interfere with the positioning of the step-position pin at the front end of the reverse side of the blank. At this time, the initial positioning post can be retracted by the blank acting on it. In this way, the initial positioning post will not interfere with the positioning of the reverse side of the blank. It can be flexibly adjusted during the stamping process according to the actual positioning position of the front and back sides of the blank and the stamping requirements, thereby improving the accuracy and stability of positioning and ensuring the quality of the stamped parts.

[0017] Furthermore, the distance between adjacent sides of the triangular workpieces on the blank is 6 to 10 millimeters.

[0018] The beneficial effects of adopting the above-mentioned further solution are that, with appropriate spacing, during the stamping process, on the one hand, adjacent triangular workpieces will not interfere with each other due to being too close, avoiding problems such as material deformation and incomplete stamping during stamping, thereby ensuring that the shape and size of each triangular workpiece can meet the design requirements; on the other hand, this distance will not be too large, allowing as many triangular workpieces as possible to be stamped on a limited blank area, improving material utilization and reducing the production cost of stamped parts.

[0019] Furthermore, the base of the triangular cavity is flush with the vertex of the triangular cavity on the same side, or the base of the triangular cavity is located outside the vertex of the triangular cavity on the same side.

[0020] The beneficial effect of adopting the above-mentioned further solution is that, whether it is front stamping or back stamping, the blank stamping forms a triangular cavity with both sides flush, or the bottom edge of the triangular cavity is further outward than the vertex of the triangular cavity on the same side. The triangular cavities are compact and neatly arranged, making full use of the blank sheet, improving the material utilization rate, and reducing the manufacturing cost of stamped parts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the stamping process for the triangular workpiece of the present invention; Figure 2 This is a schematic diagram of the specific stamping process in step S2 of the present invention; Figure 3 This is a schematic diagram of the specific stamping process in step S3 of the present invention; Figure 4 This is a schematic diagram of the specific stamping process in step S4 of the present invention; Figure 5 This is a schematic diagram of the specific stamping process in step S5 of the present invention; Figure 6 This is a structural schematic diagram showing the dimensions of the blank of the present invention; Figure 7 A schematic diagram of the stamping structure for an existing triangular workpiece; In the diagram, 1. billet; 2. triangular cavity; 3. initial positioning pin; 4. pitch positioning pin; 5. side positioning pin; 601. first triangular workpiece; 602. second triangular workpiece; 603. third triangular workpiece; 604. fourth triangular workpiece; 605. fifth triangular workpiece; 606. sixth triangular workpiece; 607. seventh triangular workpiece; 608. eighth triangular workpiece; 609. ninth triangular workpiece; 610. tenth triangular workpiece. Detailed Implementation

[0022] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0023] like Figures 1-6 As shown, a cold stamping processing method for a triangular workpiece includes a stamping machine, the stamping machine being equipped with a punch for processing the triangular workpiece, the stamping machine also being equipped with a stamping platform, the stamping platform being equipped with an initial positioning post 3, a step positioning pin 4 and a plurality of side positioning posts 5, the initial positioning post 3 being a telescopic structure, and the step positioning pin 4 being located in front of the initial positioning post 3. The processing steps are as follows: S1. Material preparation: Based on the height of the triangular workpiece plus the width of the two overlapping sides, the width of the strip is taken as the width of the strip, and the length of the strip is taken as L. The blank 1 is then cut. S2. Position the two sides of the blank 1 by the side positioning posts 5 respectively, so that the front end of the blank 1 abuts against the initial positioning post 3, and stamp to form the first triangular workpiece 601. Then move the blank 1 forward according to the agreed step distance, so that the position of the third triangular workpiece 603 of the blank 1 is moved to the bottom of the punch, and stamp to form the third triangular workpiece 603. Repeat the above process until the blank 1 of length L / 2 is stamped. S3. Flip the blank 1 after S2 stamping by 180 degrees and position both sides of the blank 1 by the side positioning pins 5 respectively, so that the front end of the blank 1 abuts against the pitch positioning pin 4, and stamping to form the second triangular workpiece 602. Then move the blank 1 forward according to the agreed pitch, so that the position of the fourth triangular workpiece 604 of the blank 1 is moved to the bottom of the punch, and stamping to form the fourth triangular workpiece 604. Repeat the above process until the blank 1 of length L / 2 is stamped. S4. Turn the blank 1 that has passed through S3 around and rotate it 180 degrees. Position both sides of the blank 1 using the side positioning posts 5, so that the front end of the blank 1 abuts against the initial positioning post 3. Stamp to form the Nth triangular workpiece. Then move the blank 1 forward according to the agreed step distance, so that the position of the N-2th triangular workpiece of the blank 1 is moved to the bottom of the punch. Stamp to form the N-2th triangular workpiece. Repeat the above process until the blank 1 with a remaining length of L / 2 is stamped. S5. Flip the blank 1 after S4 stamping by 180 degrees, and position both sides of the blank 1 by the side positioning pins 5 respectively, so that the front end of the blank 1 abuts against the pitch positioning pin 4, and stamp to form the N-1th triangular workpiece. Then move the blank 1 forward according to the agreed pitch, so that the N-3rd triangular workpiece of the blank 1 is moved to the bottom of the punch, and stamp to form the N-3rd triangular workpiece. Repeat the above process until the blank 1 is stamped. S6, stamping ends.

[0024] The step-positioning pin 4 can position the blank 1, enabling the blank 1 to move according to the agreed step distance. It can also be used as the end positioning of the reverse side of the blank 1. During positioning, the initial positioning pin 3 will not interfere with the positioning of the blank 1 by the step-positioning pin 4. The initial positioning pin 3 and the step-positioning pin 4 cooperate with each other to meet the requirements of accurate positioning of the front and back sides of the blank 1, thereby completing the positioning task of different sides of the blank 1, further improving the accuracy and reliability of the blank 1 positioning, and providing a strong guarantee for stamping more high-quality triangular workpieces.

[0025] After the blank 1 is stamped into a triangular workpiece, a triangular cavity 2 is formed. The triangular cavity 2 has a positioning point located on the side opposite the vertex of the next stamped triangular workpiece. The distance between the positioning point and the step positioning pin 4 is the predetermined step distance. Under the action of the stamping machine, after the triangular workpiece is stamped, a triangular cavity 2 is formed on the blank 1. The triangular cavity 2 has a positioning point on the side opposite the vertex of the next stamped triangular workpiece. By fully utilizing this positioning point, it is moved to the abutment position of the step positioning pin 4. The step positioning pin 4 positions the blank 1, and in conjunction with the positioning of the side positioning posts 5 on both sides, the position of the next triangular workpiece to be stamped can be accurately located. By fully utilizing the triangular cavity 2 after the previous stamping to position the next triangular workpiece to be stamped, the position of the next triangular workpiece on the blank 1 is accurately moved below the punch, ensuring the accuracy of the stamping position of each triangular workpiece, meeting the stamping quality requirements of the triangular workpiece, fully utilizing the blank 1, and reducing material waste.

[0026] The width of the overlap is 1 to 2 times the thickness of the blank 1. By controlling the overlap width to be 1 to 2 times the thickness of the blank 1, the material flow during the stamping process can be further optimized, ensuring that the material is evenly distributed when stamping triangular workpieces, reducing waste caused by uneven material flow. This not only meets the quality requirements of the stamped parts, but also further improves the utilization rate of the sheet metal, maximizing the saving of raw material costs.

[0027] The length L of the blank 1 is 0.5 meters to 1.5 meters. By setting the length L of the blank 1 within the range of 0.5 meters to 1.5 meters, it is possible to better adapt to the production needs of triangular workpieces of different sizes.

[0028] The initial positioning post 3 is mounted on the stamping platform via a telescopic spring. The telescopic spring in the initial positioning post 3 satisfies its extension and retraction requirements. When positioning the blank 1 via the initial positioning post 3, the blank 1 can be positioned using the extended initial positioning post 3. When positioning the reverse side of the blank 1, the initial positioning post 3 must not interfere with the positioning of the step-position pin 4 on the front end of the reverse side of the blank 1. Therefore, the initial positioning post 3 can be retracted by the blank 1 acting on it, thus preventing interference with the positioning of the reverse side of the blank 1. This allows for flexible adjustment during the stamping process based on the actual positioning positions of the front and back sides of the blank 1 and the stamping requirements, thereby improving the accuracy and stability of the positioning and ensuring the quality of the stamped parts.

[0029] The distance between adjacent sides of the triangular workpieces on the blank 1 is 6-10 mm. This appropriate spacing ensures that, during the stamping process, on the one hand, adjacent triangular workpieces will not interfere with each other due to excessive proximity, avoiding problems such as material deformation and incomplete stamping, thus ensuring that the shape and size of each triangular workpiece meet design requirements; on the other hand, this distance is not too large, allowing for the stamping of as many triangular workpieces as possible within the limited area of ​​the blank 1, improving material utilization and reducing the production cost of stamped parts.

[0030] The base of the triangular cavity 2 is flush with the vertex of the triangular cavity 2 on the same side, or the base of the triangular cavity 2 is located outside the vertex of the triangular cavity 2 on the same side. Whether it is front stamping or back stamping, the blank 1 stamping forms triangular cavities 2 with both sides flush, or the base of the triangular cavity 2 is slightly outside the vertex of the triangular cavity 2 on the same side. The triangular cavities 2 are compact and neatly arranged, making full use of the blank 1 sheet, improving material utilization, and reducing the manufacturing cost of stamped parts.

[0031] like Figures 2 to 6 As shown, the triangular workpiece to be stamped has a base length of 133.82 mm and a height of 119.38 mm. The agreed step distance is 182.36 mm. The processing steps are as follows: S1. Material preparation: The width of the strip is determined by adding two overlap widths to the height of the triangular workpiece. The width of the strip is 135mm. The length of the strip is L. The blank 1 is cut off. The length L of the blank 1 is greater than twice the length of the set of punches. The length L can be 1000mm. S2. Position the two sides of the blank 1 using the side positioning pins 5, so that the front end of the blank 1 abuts against the initial positioning pin 3, and stamp to form the first triangular workpiece 601. Then, manually move the blank 1 forward according to the agreed step distance. The positioning point of the triangular cavity 2 formed after the first triangular workpiece 601 is stamped abuts against the step distance positioning pin 4, so that the position of the third triangular workpiece 603 of the blank 1 is moved to the bottom of the punch. The press operates and stamps to form the third triangular workpiece 603. Then, manually move the blank 1 forward according to the predetermined step distance. The positioning point of the triangular cavity 2 formed after the third triangular workpiece 603 is stamped abuts against the step distance positioning pin 4. The position of the fifth triangular workpiece 605 of the blank 1 is moved to the bottom of the punch. The press operates and stamps to form the fifth triangular workpiece 605. S3. After the blank 1 is stamped in S2, it is rotated 180 degrees along the long side of the blank 1. The two sides of the blank 1 are positioned by the side positioning pins 5 respectively, so that the front end of the blank 1 abuts against the pitch positioning pin 4. The blank 1 is stamped to form the second triangular workpiece 602. Then, the blank 1 is manually moved forward according to the agreed pitch. The positioning point of the triangular cavity 2 formed by the second triangular workpiece 602 of the blank 1 abuts against the pitch positioning pin 4, so that the position of the fourth triangular workpiece 604 of the blank 1 is moved to the bottom of the punch. The press is activated and the fourth triangular workpiece 604 is stamped. S4. Turn the blank 1 after S3 around. Turning the blank 1 around means exchanging the positions of the front and rear ends of the blank and rotating it 180 degrees along the long side of the blank 1. Position both sides of the blank 1 through the side positioning pins 5 respectively, so that the front end of the blank 1 abuts against the initial positioning pin 3. Stamp to form the tenth triangular workpiece 610. Then, manually move the blank 1 forward according to the agreed step distance. The positioning point of the triangular cavity 2 formed after the tenth triangular workpiece 610 is stamped abuts against the step distance positioning pin 4. The position of the eighth triangular workpiece 608 of the blank 1 is moved to the bottom of the punch. The stamping machine is activated to stamp to form the eighth triangular workpiece 608. Then, manually move the blank 1 forward according to the agreed step distance. The positioning point of the triangular cavity 2 formed after the eighth triangular workpiece 608 is stamped abuts against the step distance positioning pin 4. The position of the sixth triangular workpiece 606 of the blank 1 is moved to the bottom of the punch. The stamping machine is activated to stamp to form the sixth triangular workpiece 606. S5. After the blank 1 is stamped in S4, it is rotated 180 degrees along the long side of the blank 1. The two sides of the blank 1 are positioned by the side positioning pins 5 respectively, so that the front end of the blank 1 abuts against the pitch positioning pin 4. The blank 1 is stamped to form the ninth triangular workpiece 609. Then, the blank 1 is manually moved forward according to the agreed pitch. The positioning point of the triangular cavity 2 formed after the ninth triangular workpiece 609 is stamped abuts against the pitch positioning pin 4. The position of the seventh triangular workpiece 607 of the blank 1 is moved to the bottom of the punch. The stamping machine is activated and the seventh triangular workpiece 607 is stamped. S6, stamping ends.

[0032] Using the above processing method, the distance between adjacent sides of the triangular workpieces on the blank 1 is 6.53 mm, and the distance between the base of the triangular workpiece and the side of the blank 1 is 7.81 mm. Ten triangular workpieces can be obtained from a 1000 mm long blank 1 after left-right flipping and front-back stamping. While meeting the stamping quality requirements of the triangular workpieces, and... Figure 7 Compared with the existing triangular workpiece stamping process shown, more triangular workpieces can be stamped on the original sheet metal, making full use of the material of blank 1, reducing raw material waste, greatly improving the utilization rate of sheet metal, so that the material utilization rate can reach more than 90%, and significantly reducing the manufacturing cost of triangular workpieces.

[0033] 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 within the protection scope of the present invention.

Claims

1. A cold stamping method for processing a triangular workpiece, comprising a stamping machine, wherein the stamping machine is provided with a punch for processing the triangular workpiece, characterized in that, The press is also equipped with a stamping platform, which is provided with an initial positioning post (3), a step positioning pin (4) and multiple side positioning posts (5). The initial positioning post (3) is a telescopic structure, and the step positioning pin (4) is located in front of the initial positioning post (3). The processing steps are as follows: S1. Material preparation: Based on the height of the triangular workpiece plus the width of 2 overlaps, the width of the strip is taken as the strip length L, and the blank is cut (1). S2. Position the two sides of the blank (1) respectively through the side positioning post (5), so that the front end of the blank (1) abuts against the initial positioning post (3) and stamps to form the first triangular workpiece (601). Then move the blank (1) forward according to the agreed step distance, so that the position of the third triangular workpiece (603) of the blank (1) is moved to the bottom of the punch and stamps to form the third triangular workpiece (603). Repeat the above process until the blank (1) of L / 2 is stamped. S3. Flip the blank (1) after S2 stamping by 180 degrees, and position the two sides of the blank (1) by the side positioning pins (5) respectively, so that the front end of the blank (1) abuts against the pitch positioning pin (4) and stamping to form the second triangular workpiece (602). Then move the blank (1) forward according to the agreed pitch, so that the position of the fourth triangular workpiece (604) of the blank (1) is moved to the bottom of the punch and stamping to form the fourth triangular workpiece (604). Repeat the above process until the blank (1) of L / 2 is stamped. S4. Turn the blank (1) after S3 around and rotate it 180 degrees. Position both sides of the blank (1) through the side positioning posts (5) so that the front end of the blank (1) abuts against the initial positioning post (3) and stamps to form the Nth triangular workpiece. Then move the blank (1) forward according to the agreed step distance so that the N-2th triangular workpiece of the blank (1) is moved to the bottom of the punch and stamped to form the N-2th triangular workpiece. Repeat the above process until the remaining L / 2 blank (1) is stamped. S5. Flip the blank (1) after S4 stamping by 180 degrees, and position the two sides of the blank (1) by the side positioning pins (5) respectively, so that the front end of the blank (1) abuts against the pitch positioning pin (4) and stamps to form the N-1th triangular workpiece. Then move the blank (1) forward according to the agreed pitch, so that the N-3rd triangular workpiece of the blank (1) is moved to the bottom of the punch and stamps to form the N-3rd triangular workpiece. Repeat the above process until the blank (1) is stamped. S6, stamping ends.

2. The cold stamping method for a triangular workpiece according to claim 1, characterized in that, The blank (1) will form a triangular cavity (2) after being stamped into a triangular workpiece. The triangular cavity (2) is provided with a positioning point. The positioning point is located on the side opposite the vertex of the triangular cavity (2) near the next stamped triangular workpiece. The distance between the positioning point and the step positioning pin (4) is the agreed step distance.

3. The cold stamping method for a triangular workpiece according to claim 1, characterized in that, The width of the overlap is 1 to 2 times the thickness of the blank (1).

4. The cold stamping method for a triangular workpiece according to claim 1, characterized in that, The length L of the blank (1) is 0.5 meters to 1.5 meters.

5. The cold stamping method for processing triangular workpieces according to any one of claims 1-4, characterized in that, The initial positioning post (3) is set on the stamping platform by a telescopic spring.

6. The cold stamping method for processing triangular workpieces according to any one of claims 1-4, characterized in that, The distance between adjacent sides of the triangular workpieces on the blank (1) is 6 to 10 mm.

7. The cold stamping method for a triangular workpiece according to claim 2, characterized in that, The bottom edge of the triangular cavity (2) is flush with the vertex of the triangular cavity (2) on the same side, or the bottom edge of the triangular cavity (2) is located outside the vertex of the triangular cavity (2) on the same side.

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