Mold for forming a cover ring type part

Abstract

The application discloses a cover ring type part forming die in the technical field of sheet metal stamping forming, and the die does not need to repeatedly position a blank or a semi-finished product, and only needs a set of tooling or equipment to completely form the part, and the production efficiency is higher; and in the forming process, the forming punch is supported by an elastic supporting piece, so that the forming punch starts to stretch and form the blank after blanking, the blank is pre-formed before being punched, then the blank is punched, the influence of the blank forming after punching on the shape and size of the hole is reduced, meanwhile, the material outflow in the forming process is restrained by the middle entity part of the blank, the thinning trend of the center of the blank is reduced, the stress size generated at the hole edge when punching is reduced, cracks and fractures generated at the hole edge when punching are prevented, the late stage of the stretch forming of the blank is synchronized with the flanging of the blank, the material flow in the forming and flanging processes is effectively controlled, the wall thickness of the finally formed part is more uniform, and the product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of sheet metal stamping and forming technology, specifically to forming molds for ring-type parts. Background Technology

[0002] The engine diaphragm cover rear support ring is a cover ring part. The material thickness of this part is 1.5mm. The main body of the part is a tapered outer circle with an inner hole flange at the bottom.

[0003] Generally, the forming processes for these types of parts include the following:

[0004] 1. Blanking and punching compound die – preparing ring-shaped flat blank – stretching and flanging compound die – preparing parts;

[0005] 2. Laser cutting blanking – preparation of ring-shaped flat blank – stretching and flanging composite die – part preparation;

[0006] 3. Blanking and stretching compound die – preparation of semi-finished products – punching and flanging compound die – preparation of parts.

[0007] All of the above process routes have problems such as difficulty in repeatedly positioning the blank or semi-finished product, requiring multiple sets of tooling or equipment, resulting in low production efficiency. Furthermore, there are issues with uncontrollable material flow during the step-by-step forming process. For example, pre-forming the inner hole reduces the restraint on material flow in the central part. During blanking and stretching, a large amount of material in the center flows outward, while the external material has less flow due to increased resistance caused by thickening. This may result in severe thinning of the internal wall, insufficient flange height of the inner hole, or changes in the shape and size of the hole. When stretching is performed first and then punching, the stress generated in the blank during stretching will be further concentrated during punching, leading to cracks or fractures around the hole.

[0008] Based on this, the present invention designs a mold for forming ring-shaped parts to solve the above problems. Summary of the Invention

[0009] To achieve the above objectives, the present invention provides the following technical solution: a forming mold for ring-shaped parts, comprising an upper mold and a lower mold, characterized in that:

[0010] The upper mold includes an upper template, a male mold, and a punch, and the male mold and the punch are both fixed to the bottom surface of the upper template.

[0011] The lower mold includes a lower template, a female mold, a forming punch, and a lower punch. The female mold and the lower punch are fixed to the top surface of the lower template, and the forming punch is vertically slidably disposed on the top surface of the lower template.

[0012] The top surface of the female mold has a cavity for blanking, and the shape of the bottom surface of the male mold matches the shape of the opening of the cavity on the top surface of the female mold, so as to cooperate with the cavity on the top surface of the female mold to realize blanking.

[0013] The lower punch is located in the cavity on the top surface of the female mold. The top surface of the lower punch is not higher than the top surface of the female mold and has a punching slot. The bottom of the punching punch matches the shape and size of the punching slot to cooperate with the punching slot to punch the blank. The bottom surface of the punching punch is higher than the bottom surface of the male mold in the vertical direction.

[0014] The bottom surface of the male die has a cavity for flanging, and the top surface of the lower punch matches the opening shape of the cavity formed on the bottom surface of the male die, so as to enter the cavity on the bottom surface of the male die and flang the blank punching position.

[0015] The forming punch is located in the cavity on the top surface of the female mold, and the bottom of the forming punch is provided with an elastic support member for supporting the forming punch, so that the top surface of the forming punch and the top surface of the female mold are kept on the same plane, and a gap is generated between the bottom surface of the forming punch and the top surface of the lower template. The bottom of the male mold and the top of the forming punch are both provided with contoured surfaces for forming parts.

[0016] As a further aspect of the present invention, the bottom surface of the punch is not lower than the top of the contour surface of the male die in the vertical direction, and the height difference between the bottom surface of the punch and the top of the contour surface of the male die in the vertical direction does not exceed the thickness of the blank.

[0017] As a further embodiment of the present invention, a first push rod is vertically slidably arranged on the lower template, and a top ring is provided at the top of the first push rod. The vertical projection of the top ring falls within the vertical projection range of the male mold. A driving component for driving the first push rod to move up and down is provided below the lower template. The distance from the bottom surface of the first push rod to the top surface of the top ring is not less than the distance from the bottom surface of the lower template to the top surface of the female mold.

[0018] As a further embodiment of the present invention, the top ring is adjacent to the inner annular surface of the cavity on the top surface of the female mold.

[0019] As a further embodiment of the present invention, a second push rod is provided through the lower punch and the lower template, and a top block is provided in the punching groove. One end of the second push rod extends into the punching groove and is connected to the top block, and the height from the bottom surface of the second push rod to the top surface of the top block is not less than the sum of the heights of the lower template and the lower punch.

[0020] As a further embodiment of the present invention, the height from the bottom surface of the second push rod to the top surface of the top block is equal to the sum of the heights of the lower template and the lower punch, and the bottom surface of the second push rod is used to contact the driving component.

[0021] As a further embodiment of the present invention, the outer ring surface and the top surface of the lower punch have a transition arc surface.

[0022] As a further embodiment of the present invention, a third push rod is vertically inserted into the upper template. The bottom end of the third push rod is located in the cavity of the bottom surface of the male mold and is fixed with a punch block. The top end protrudes from the top surface of the upper template and is fixed with a punch plate. One side of the punch block is in contact with the inner wall of the male mold cavity.

[0023] As a further embodiment of the present invention, a stripper plate is fixedly provided on the female mold, and the stripper plate is attached to the outer surface of the male mold.

[0024] As a further embodiment of the present invention, a T-shaped rod is fixedly provided at the bottom of the forming punch, and the T-shaped rod is slidably disposed in the T-shaped hole opened in the lower template to limit the highest position of the forming punch.

[0025] The present invention has the following beneficial effects:

[0026] This device achieves a composite process of blanking, stretching, punching, and flanging by utilizing the shape and positional relationships of the upper template, male mold, punching punch, lower template, female mold, forming punch, and lower punch. It eliminates the need for repeated positioning of the blank or semi-finished product, requiring only one set of tooling or equipment to completely form parts, resulting in higher production efficiency. Furthermore, during the forming process, the forming punch is supported by elastic supports, allowing it to begin stretching the blank immediately after blanking. This pre-forms the blank before punching, reducing the impact of blank forming on the shape and size of the hole. Simultaneously, the solid portion in the middle of the blank restrains material outflow during forming, reducing the tendency for thinning at the center of the blank and decreasing the stress at the hole edges during punching, preventing cracks and fractures. The later stages of blank stretching are synchronized with blank flanging, effectively controlling material flow during forming and flanging, resulting in more uniform wall thickness in the final formed parts, preventing wrinkles, and improving product quality.

[0027] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the initial fit between the upper and lower molds of the present invention.

[0031] Figure 3This is a schematic diagram showing the complete fit between the upper and lower molds of the present invention.

[0032] Figure 4 This is a top view of the unloading plate in this invention.

[0033] Legend:

[0034] 11. Upper mold plate; 12. Male mold; 13. Punching punch; 14. Third ejector pin; 141. Block; 142. Plate; 21. Lower mold plate; 22. Female mold; 23. Forming punch; 231. Elastic support; 232. T-shaped rod; 24. Lower punch; 241. Punching slot; 25. First ejector pin; 251. Ejector ring; 26. Driving component; 27. Second ejector pin; 271. Ejector block; 28. Stripper plate. Detailed Implementation

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0036] Please see Figure 1-4 This invention provides a technical solution: a forming mold for ring-shaped parts, comprising an upper mold and a lower mold.

[0037] The upper mold includes an upper template 11, a male mold 12, and a punching head 13. The male mold 12 and the punching head 13 are both fixed to the bottom surface of the upper template 11.

[0038] The lower mold includes a lower template 21, a female mold 22, a forming punch 23 and a lower punch 24. The female mold 22 and the lower punch 24 are fixed on the top surface of the lower template 21, and the forming punch 23 is vertically slidably disposed on the top surface of the lower template 21.

[0039] The top surface of the female mold 22 has a cavity for blanking. The bottom surface shape of the male mold 12 matches the opening shape of the cavity on the top surface of the female mold 22, and is used to cooperate with the cavity on the top surface of the female mold 22 to achieve blanking. The female mold 22 can be annular, with the inner cavity forming a cavity, or a circular groove can be opened on the top surface of the female mold 22 to form a cavity on the top surface of the female mold 22. Figure 1 As shown, in this example, the female mold 22 is annular;

[0040] The lower punch 24 is located in the cavity on the top surface of the female mold 22. The top surface of the lower punch 24 is not higher than the top surface of the female mold 22 and has a punching groove 241. The bottom of the punching punch 13 matches the shape and size of the punching groove 241 to punch the blank. The bottom surface of the punching punch 13 is higher than the bottom surface of the male mold 12 in the vertical direction, so that after blanking, it can punch the blank by cooperating with the punching groove 241. After blanking, the blank will fall on the lower punch 24 in the female mold 22. The upper template 11 and the lower template 21 continue to move closer. The blank is punched by the cooperation of the punching punch 13 and the punching groove 241.

[0041] The bottom surface of the male die 12 has a cavity, and the top surface shape of the lower punch 24 matches the opening shape of the cavity formed on the bottom surface of the male die 12. This allows it to enter the cavity on the bottom surface of the male die 12 and flange the blank at the punching position. Figure 3 As shown, after punching is completed, the edge of the punching position of the blank will contact the top surface of the lower punch 24. The upper template 11 and the lower template 21 continue to move closer, and the lower punch 24 enters the inner cavity of the male mold 12. The lower punch 24 is used to fold the edge of the punching position of the blank.

[0042] The male mold 12 can be annular, with an inner cavity forming a hollow space, or a circular groove can be formed on the bottom surface of the male mold 12 to create a hollow space. Figure 1 As shown, in this example, the male mold 12 is annular.

[0043] The forming punch 23 is located inside the female mold 22, and an elastic support member 231 is provided on the lower template 21 to support the forming punch 23, so that the top surface of the forming punch 23 is kept on the same plane as the top surface of the female mold 22, and a gap is created between the bottom surface of the forming punch 23 and the top surface of the lower template 21. The bottom of the male mold 12 and the top of the forming punch 23 are both provided with contour surfaces for forming parts, so that the forming punch 23 abuts against the bottom surface of the blank during blanking, punching, and flanging. The elastic force generated by the deformation of the elastic support member 231 pre-presses the blank, and after the bottom surface of the forming punch 23 contacts the top surface of the lower template 21, the blank is completely pressed into shape. Figure 1 As shown, when the male mold 12 and female mold 22 clamp the blank in preparation for unloading, the forming punch 23 has already abutted against the lower surface of the blank. At this time, the male mold 12 enters the female mold 22 to unload the blank. The unloaded blank will bend under the action of the male mold 12, and the bent part of the blank edge will press down on the forming punch 23, so that the elastic support 231 between the forming punch 23 and the lower template 21 is compressed. After the elastic support 231 is compressed, it generates an upward elastic force that acts on the bottom surface of the blank through the forming punch 23. This force is generated by the square surface at the top of the forming punch 23 and the contour surface at the top of the male mold 12. The pre-forming of the blank is achieved through the cooperation of the elastic support 231 and the bottom surface of the blank. During the subsequent punching and flanging process, as the compression of the elastic support 231 increases, the pressure applied to the blank by the forming punch 23 increases, providing greater support force to prevent wrinkles from appearing in the blank during punching and flanging, thus ensuring the quality of forming. By elastically setting the forming punch 23 on the lower template 21, the forming punch 23 can support the blank from the beginning of blanking. Together with the male mold 12, the blank is pressed to prevent wrinkles from appearing in the blank during subsequent processing.

[0044] The overall forming process is described below. First, the blank is placed on the top surface of the female mold 22, with the male mold 12 positioned above it. At this point, the blank is larger than the vertical projection of the male mold 11. A blank required for forming the part needs to be punched out through the cooperation of the male mold 12 and the female mold 22. Next, the male mold 12 and the punching punch 13 descend under the action of the upper template 11. Since the bottom surface of the punching punch 13 is higher than the bottom surface of the male mold 12, the male mold 12 first contacts the top surface of the blank. Through the cooperation of the male mold 12 and the cavity on the top surface of the female mold 22, a blank with the same vertical projection as the male mold 12 is punched out from the blank. The punched-down blank falls onto the top surface of the lower punch 24 and the forming punch 23. Subsequently, the male mold 12 continues to descend, pressing down on the edge of the blank, causing it to bend downwards. As the blank bends downwards under the action of the male mold 12, it drives the forming punch 23 to descend, forcing the elastic support 231 at the bottom of the forming punch 23 to... The compressed elastic support 231 generates an upward force that acts on the bottom surface of the blank through the forming punch 23, causing the blank to deform and pre-form. Then, the punching punch 13 contacts the top surface of the blank and punches the blank with the cooperation of the punching punch 13 and the punching groove 241. The shape and size of the punch are the same as the vertical projection shape and size of the punching punch 13. After punching, the male die 12 and the punching punch 13 continue to descend. The lower punch 24 enters the cavity of the bottom surface of the male die 12. The force applied to the bottom surface of the blank by the lower punch 24 causes the edge of the blank punching position to be turned upward. While the turning is happening, the bottom surface of the forming punch 23 will hit the top surface of the lower template 21. At this time, the forming punch 23 will be unable to descend further, while the male die 12 continues to descend. The blank is completely formed by the contour surface opened on the bottom surface of the male die 12 and the top surface of the forming punch 23.

[0045] The forming punch 23 is supported by the elastic support member 231, so that the forming punch 23 begins to stretch and form the blank after blanking. This pre-forms the blank before punching, reducing the impact of blank forming on the shape and size of the hole after punching. At the same time, the solid part in the middle of the blank restrains the outflow of material during the forming process, reducing the tendency of the blank center to thin, reducing the stress generated at the edge of the hole during punching, and preventing cracks and fractures at the edge of the hole during punching. The later stage of blank stretching and forming is carried out simultaneously with blank flanging, mutually restraining the flow of material, effectively controlling the flow of material during forming and flanging, making the wall thickness of the final formed part more uniform, preventing wrinkles, and improving product quality.

[0046] Specifically, the elastic support 231 uses springs, with the two ends of the springs abutting against the forming punch 23 and the lower template 21 respectively, to achieve the elastic installation of the forming punch 23. The number and specifications of the springs are selected according to the specifications of the blank.

[0047] After punching is completed, the male die 12 continues to descend to flanging the blank. After the forming punch 23 abuts against the lower die 21, the forming punch 23 will be unable to descend further. The male die 12 continues to descend to flanging the blank while fully stretching and forming the blank, finally obtaining the part.

[0048] Specifically, the upper template 11 can be raised and lowered vertically under the drive of the stamping equipment to adjust the distance between the upper and lower dies.

[0049] Furthermore, such as Figure 1 As shown, the bottom surface of the punching punch 13 is not lower than the top of the contour surface of the male die 12 in the vertical direction. After the male die 12 and female die 22 are engaged to blank the material, the forming punch 23 will engage with the contour surface at the bottom of the male die 12 through the contour surface at its top. Under the elastic force of the elastic support 231, the blank is pre-formed. During punching, the bottom surface of the punching punch 13 and the top surface of the lower punch 24 need to reach the same height. Since the bottom surface of the punching punch 13 is not lower than the top of the contour surface of the male die 12, before punching begins, the contour surface on the male die 12 will descend below the top surface of the lower punch 24 to engage with the forming punch 23, ensuring the pre-forming effect of the male die 12 and the forming punch 23 on the blank. Figure 3 As shown, the main body of the ring-shaped part is stepped. Before punching and flanging, the main body of the part has been initially bent and formed. At this time, the center of the part is not punched, which can restrain the material at the center of the blank and prevent the central material from flowing out in large quantities. This helps to improve the uniformity of the wall thickness of the final formed part and improve the product quality.

[0050] Meanwhile, the vertical height difference between the bottom surface of the punching punch 13 and the top of the contour surface of the male die 12 should not exceed the thickness of the blank. The height difference between the bottom surface of the punching punch 13 and the top of the contour surface of the male die 12 should be controlled within a reasonable range to prevent the height difference from being too large and affecting the punching and flanging sequence of the parts.

[0051] like Figure 1As shown, a first ejector rod 25 is vertically slidably mounted on the lower template 21. A top ring 251 is located at the top of the first ejector rod 25, and the vertical projection of the top ring 251 falls within the vertical projection range of the male mold 12. A driving component 26 for driving the first ejector rod 25 to move up and down is located below the lower template 21. The distance from the bottom surface of the first ejector rod 25 to the top surface of the top ring 251 is not less than the distance from the bottom surface of the lower template 21 to the top surface of the female mold 22. Before blanking, the top surface of the top ring 251 and the top surface of the female mold 22 are kept at the same height. The drive component 26 provides a certain amount of support force. During blanking, the bottom surface of the male mold 12 contacts the top surface of the blank and applies downward force, while the top surface of the top ring 251 contacts the bottom surface of the blank and applies upward force. By clamping the blank with the male mold 12 and the top ring 251, the required blanking force is provided to the blank. In the subsequent blanking, forming, punching and flanging processes, the top ring 251 and the first ejector rod 25 descend synchronously with the male mold 12, always providing blanking force to the blank to control the flow of material and prevent wrinkles.

[0052] After the blank is fully formed and the part is obtained, the first ejector pin 25 can be driven to rise by the drive component 26. The first ejector pin 25 drives the top ring 251 and the part already formed on the top ring 251 to rise. Finally, the top ring 251 will rise to a height that is flush with the top surface of the female mold 22, so that the final part can be easily separated from the lower mold.

[0053] Specifically, the top ring 251 is adjacent to the inner ring surface of the female mold 22, so that the top ring 251 can cooperate with the male mold 12 to press the edge of the blank in the blanking area during blanking.

[0054] In some examples, a second push rod 27 is provided in both the lower punch 24 and the lower template 21. A top block 271 is provided in the punching groove 241. One end of the second push rod 27 extends into the punching groove 241 and is connected to the top block 271. The height from the bottom surface of the second push rod 27 to the top surface of the top block 271 is not less than the sum of the heights of the lower template 21 and the lower punch 24. The height of the second push rod 27 is adjusted by the drive component 26.

[0055] like Figure 1As shown, in this example, the height from the bottom surface of the second ejector pin 27 to the top surface of the top block 271 is exactly equal to the sum of the heights of the lower template 21 and the lower punch 24. After the punching punch 13 and the punching slot 241 work together to punch the blank, the waste generated during punching will fall into the punching slot 241. After punching is completed, the male die 12 will continue to descend to form and flang the blank. Therefore, the punching slot 241 needs to have space for the punching punch 13 to continue descending. At the same time, the waste generated during punching will fall to the bottom of the punching slot 241. In order to facilitate the cleaning of the waste generated during punching after forming, the second ejector pin 27 is inserted into the lower template 21 and the lower punch 24. The top end of the second ejector pin 27 extends into the punching slot 241 and connects with the top block 271. The top block 271 is located in the punching slot 241, and the height from the bottom surface of the second ejector pin 27 to the top surface of the top block 271 is not less than the height of the lower template 21 and the lower punch. The sum of the heights of 24 and 25 means that when the top block 271 contacts the bottom surface of the punching slot 241, the bottom end of the second push rod 27 will protrude from the bottom surface of the lower template 21. When the top surface of the top block 271 is at the same height as the top surface of the lower punch 24, the bottom surface of the second push rod 27 is exactly at the same height as the bottom surface of the lower template 21. In other words, the waste generated during punching will fall onto the top surface of the top block 271. When the final part is formed, the driving component 26 drives the first push rod 25 to rise, and the driving component 26 will also drive the second push rod 27 to rise. The rise of the second push rod 27 drives the top block 271 to rise, so as to realize the ejection of the waste in the punching slot 241. Since the top surface of the top block 271 is at the same height as the top surface of the lower punch 24, the top block 271 will not affect the discharge of the part, realizing the automatic ejection of the part and the punching waste after the part is formed, making it convenient to remove the part and the punching waste.

[0056] like Figure 1-3 As shown, in some examples, there is a transition arc surface between the outer ring surface and the top surface of the lower punch 24. When flanging the opening position of the blank, the position of the blank to be flanged changes from a horizontal state to a flanged state. In this transition process, the lower punch 24 supports the blank upward while the male die 12 presses down on the blank. The lower punch 24 lifts the middle opening position of the blank upward to form a flanging. The blank first contacts the top surface of the lower punch 24, and finally, as the flanging proceeds, the blank will contact the outer ring surface of the lower punch 24. In this process, the blank will pass through the position where the top surface of the lower punch 24 and the outer ring surface are adjacent. Therefore, setting a transition arc surface between the outer ring surface and the top surface of the lower punch 24 can make the blank flanging smoother.

[0057] like Figure 1 As shown, in some examples, a third push rod 14 is vertically inserted into the upper template 11. The bottom end of the third push rod 14 is located inside the male mold 12 and is fixed with a punch block 141. The top end protrudes from the top surface of the upper template 11 and is fixed with a punch plate 142. One side of the punch block 141 contacts the inner wall of the male mold 12.

[0058] Normally, after molding, the part falls into the lower mold and is then ejected by the top ring 251. However, due to other uncontrollable factors such as vacuum adsorption, the molded part may get stuck in the upper mold. Therefore, a third ejector rod 14 is vertically inserted into the upper mold plate 11. The bottom and top ends of the third ejector rod 14 are respectively equipped with a striking block 141 and a striking plate 142. If the part gets stuck in the upper mold after molding, the striking plate 142 can be struck, and the striking force can be transmitted to the part through the third ejector rod 14 and the striking block 141 to separate the part from the male mold 12.

[0059] like Figure 1-3 As shown, in some examples, a stripper plate 28 is fixedly provided on the female mold 22, and the stripper plate 28 is attached to the outer surface of the male mold 12.

[0060] The waste generated during the unloading process may get stuck on the outer surface of the male mold 12 and rise synchronously with the male mold 12. The unloading plate 28, which is sleeved on the outer surface of the male mold 12, can scrape the waste generated during the unloading process off the male mold 12, thereby achieving automatic separation of the waste from the male mold 12.

[0061] like Figure 1 As shown, a T-shaped rod 232 is fixedly provided at the bottom of the forming punch 23. The T-shaped rod 232 is slidably disposed in the T-shaped hole opened in the lower template 21, which limits the highest position of the forming punch 23 and prevents the top surface of the forming punch 23 from being higher than the top surface of the lower punch 24.

[0062] Specifically, the drive component 26 uses a hydraulic cylinder, such as Figure 1 As shown, a push plate is fixedly installed at the upper end of the piston rod of the hydraulic cylinder. The top surface of the push plate is parallel to the bottom surface of the lower template 21, and is used to contact the first push rod 25 and the second push rod 27 at the same time to control the lifting and lowering of the first push rod 25 and the second push rod 27.

[0063] like Figure 1 As shown, a pad is provided between the female mold 22 and the lower template 21 to increase the stroke of the male mold 12 as it descends within the female mold 22. The pad can be made of conventional rigid materials, which can reduce the overall mold manufacturing cost.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A forming mold for ring-shaped parts, comprising an upper mold and a lower mold, characterized in that: The upper mold includes an upper template (11), a male mold (12) and a punch (13), wherein the male mold (12) and the punch (13) are both fixed to the bottom surface of the upper template (11); The lower mold includes a lower template (21), a female mold (22), a forming punch (23) and a lower punch (24). The female mold (22) and the lower punch (24) are fixed on the top surface of the lower template (21), and the forming punch (23) is vertically slidably disposed on the top surface of the lower template (21). The top surface of the female mold (22) has a cavity for blanking, and the bottom surface shape of the male mold (12) matches the opening shape of the cavity on the top surface of the female mold (22) to cooperate with the cavity on the top surface of the female mold (22) to achieve blanking; The lower punch (24) is located in the cavity on the top surface of the female mold (22). The top surface of the lower punch (24) is not higher than the top surface of the female mold (22) and has a punching groove (241). The bottom of the punching punch (13) matches the shape and size of the punching groove (241) to cooperate with the punching groove to punch the blank. The bottom surface of the punching punch (13) is higher than the bottom surface of the male mold (12) in the vertical direction. The bottom surface of the male mold (12) has a cavity for flanging, and the top surface shape of the lower punch (24) matches the opening shape of the cavity formed on the bottom surface of the male mold (12), and is used to enter the cavity on the bottom surface of the male mold (12) to flanging the blank punching position. The forming punch (23) is located in the cavity of the top surface of the female mold (22), and the bottom of the forming punch (23) is provided with an elastic support member (231) for supporting the forming punch (23), so that the top surface of the forming punch (23) and the top surface of the female mold (22) are kept on the same plane, and a gap is generated between the bottom surface of the forming punch (23) and the top surface of the lower template (21). The bottom of the male mold (12) and the top of the forming punch (23) are both provided with contoured surfaces for forming parts. The bottom surface of the punch (13) is not lower than the top of the contour surface of the male mold (12) in the vertical direction, and the height difference between the bottom surface of the punch (13) and the top of the contour surface of the male mold (12) in the vertical direction does not exceed the thickness of the blank.

2. The forming mold for ring-shaped parts according to claim 1, characterized in that: A first push rod (25) is vertically slidably mounted on the lower template (21). A top ring (251) is provided at the top of the first push rod (25). The vertical projection of the top ring (251) falls within the vertical projection range of the male mold (12). A driving component (26) for driving the first push rod (25) to rise and fall is provided below the lower template (21). The distance from the bottom surface of the first push rod (25) to the top surface of the top ring (251) is not less than the distance from the bottom surface of the lower template (21) to the top surface of the female mold (22).

3. The forming mold for ring-shaped parts according to claim 2, characterized in that: The top ring (251) is adjacent to the inner annular surface of the cavity on the top surface of the female mold (22).

4. The forming mold for ring-shaped parts according to claim 1, characterized in that: The lower punch (24) and the lower template (21) are both provided with a second push rod (27). The punching groove (241) is provided with a top block (271). One end of the second push rod (27) extends into the punching groove (241) and connects with the top block (271). The height from the bottom surface of the second push rod (27) to the top surface of the top block (271) is not less than the sum of the heights of the lower template (21) and the lower punch (24).

5. The forming mold for ring-shaped parts according to claim 4, characterized in that: The height from the bottom surface of the second push rod (27) to the top surface of the top block (271) is equal to the sum of the heights of the lower template (21) and the lower punch (24), and the bottom surface of the second push rod (27) is used to contact the drive member (26).

6. The forming mold for ring-shaped parts according to claim 1, characterized in that: The lower punch (24) has a transition arc surface between its outer ring surface and top surface.

7. The forming mold for ring-shaped parts according to claim 1, characterized in that: A third push rod (14) is vertically inserted inside the upper template (11). The bottom end of the third push rod (14) is located in the cavity of the bottom surface of the male mold (12) and is fixed with a punch block (141). The top end protrudes from the top surface of the upper template (11) and is fixed with a punch plate (142). One side of the punch block (141) is in contact with the inner wall of the male mold (12).

8. The forming mold for ring-shaped parts according to claim 1, characterized in that: A stripper plate (28) is fixedly provided on the female mold (22), and the stripper plate (28) is attached to the outer surface of the male mold (12).

9. The forming mold for a ring-shaped part according to claim 1, characterized in that: The bottom of the forming punch (23) is fixedly provided with a T-shaped rod (232), which is slidably disposed in the T-shaped hole opened in the lower template (21) to limit the highest position of the forming punch (23).

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