Cover ring part forming die

Abstract

The invention discloses a cover ring type part forming die in the technical field of sheet metal stamping forming, a blank or a semi-finished product does not need to be repeatedly positioned, a part can be completely formed only through one set of tool or equipment, the production efficiency is higher, in the forming process, a forming punch is supported through an elastic supporting piece, and the forming efficiency is higher. The forming punch starts to stretch and form a blank after blanking, the blank is pre-formed before being punched, then the blank is punched, the influence of blank forming on the shape and size of a hole after punching is reduced, meanwhile, material outflow in the forming process is restrained through a middle solid part of the blank, and the forming quality of the blank is improved. The blank center thinning trend is reduced, the stress generated by the hole edge in the punching process is reduced, the hole edge is prevented from generating cracks and fractures in the punching process, the later stage of stretching forming of the blank and flanging of the blank are conducted synchronously, flowing of materials in the forming and flanging process is effectively controlled, the wall thickness of a finally-formed part is more uniform, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal stamping and forming, in particular to a forming die for cover ring parts. Background Art

[0002] The rear support ring of the engine gasket cover is a cover ring part. The material thickness of the 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 such parts include the following:

[0004] 1. Blanking and punching compound die - preparation of annular flat blanks - stretching and punching compound die - preparation of parts;

[0005] 2. Laser cutting - preparation of annular flat blanks - stretching and punching compound die - preparation of parts;

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

[0007] The above process routes all have the problems of difficulty in repeated positioning of blanks or semi-finished products, the need for multiple sets of tooling or equipment, and low production efficiency. In addition, there is the problem of uncontrollable material flow in the step-by-step forming process. For example, the prefabricated inner hole reduces the restraint of the central part on the material flow. During blanking and stretching, the central material flows outward in large quantities, while the external material increases resistance due to thickening, and the flow rate is small. The internal wall thickness may be severely reduced, the inner hole flange height may be insufficient, or the shape and size of the hole may change. When stretching is performed first and then punching, the stress generated by the blank during stretching will be further concentrated during punching, resulting in cracks or fractures around the hole.

[0008] Based on this, the present invention designs a forming die for cover ring parts to solve the above problems. Summary of the invention

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

[0010] The upper die comprises an upper die plate, a male die and a punching punch, and the male die and the punching punch are both fixedly arranged on the bottom surface of the upper die plate;

[0011] The lower die comprises a lower die plate, a female die, a forming punch and a lower punch, wherein the female die and the lower punch are fixedly arranged on the top surface of the lower die plate, and the forming punch is vertically slidably arranged on the top surface of the lower die plate;

[0012] The top surface of the female mold is formed with a cavity for blanking, and the bottom surface of the male mold matches the opening shape of the cavity on the top surface of the female mold, and is used 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 die, the top surface of the lower punch is not higher than the top surface of the female die and is provided with a punching slot, the bottom of the punch matches the shape and size of the punch slot and is used to cooperate with the punch slot to punch holes in the blank, and the bottom surface of the punch is higher than the bottom surface of the male die in the vertical direction;

[0014] The bottom surface of the male die is formed with a cavity for flanging, and the top surface shape of the lower punch matches the opening shape of the cavity formed on the bottom surface of the male die, and is used to enter the cavity on the bottom surface of the male die to flanging the punching position of the blank;

[0015] The forming punch is located in the cavity of the top surface of the female die, and an elastic support member for supporting the forming punch is provided at the bottom of the forming punch, so that the top surface of the forming punch and the top surface of the female die are maintained in 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 die and the top of the forming punch are both provided with a contouring surface for forming parts.

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

[0017] As a further solution of the present invention, a first push rod is vertically slidably arranged on the lower template, a top ring is arranged on the top of the first push rod, the vertical projection of the top ring falls within the vertical projection range of the male mold, and a driving member for driving the first push rod to rise and fall is arranged under the lower template, and 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 solution 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 solution of the present invention, a second push rod is commonly provided in the lower punch and the lower template, a push block is provided in the punching slot, one end of the second push rod extends into the punching slot and is connected to the push block, and the height from the bottom surface of the second push rod to the top surface of the push block is not less than the sum of the heights of the lower template and the lower punch.

[0020] As a further solution of the present invention, the height from the bottom surface of the second ejector pin to the top surface of the ejector block is equal to the sum of the heights of the lower template and the lower punch, and the bottom surface of the second ejector pin is used to contact the driving member.

[0021] As a further solution of the present invention, a transitional cambered surface is provided between the outer annular surface and the top surface of the lower punch.

[0022] As a further solution of the present invention, a third push rod is vertically penetrated in 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 block, the top end protrudes from the top surface of the upper template and is fixed with a hitting plate, and one side of the hitting block is in contact with the inner wall of the male mold.

[0023] As a further solution of the present invention, a stripper plate is fixedly provided on the female mold, and 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 solution 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 arranged in a 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] The device realizes the combination of blanking, stretching forming, punching and flanging through the shape and position relationship of the upper template, the male die, the punching punch, the lower template, the female die, the forming punch and the lower punch. There is no need to repeatedly position the blank or the semi-finished product. Only one set of tooling or equipment is needed to completely form the parts, and the production efficiency is higher. In the forming process, the forming punch is supported by the elastic support member, so that the forming punch starts to stretch and form the blank after blanking, so that the blank is pre-formed before punching, and then the blank is punched, thereby reducing the influence of the blank forming after punching on the shape and size of the hole. At the same time, the material outflow during the forming process is restrained by the middle solid part of the blank, the thinning trend of the center of the blank is reduced, the stress generated at the edge of the hole during punching is reduced, and cracks and fractures are prevented at the edge of the hole during punching. The late stage of the blank stretching forming is synchronized with the flanging of the blank, effectively controlling the flow of materials during the forming and flanging processes, making the wall thickness of the final formed part more uniform, preventing wrinkles, and improving product quality.

[0027] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0030] Figure 2 It is a schematic diagram of the preliminary cooperation between the upper die and the lower die of the present invention.

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

[0032] Figure 4 It is a top view schematic diagram of the unloading plate in the present invention.

[0033] Legend:

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

[0035] The embodiments of the present invention are 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] See also Figure 1-4 The present invention provides a technical solution: a cover ring type parts forming mold, including an upper mold and a lower mold,

[0037] The upper die includes an upper die plate 11, a male die 12 and a punching punch 13, and the male die 12 and the punching punch 13 are fixedly arranged on the bottom surface of the upper die plate 11;

[0038] The lower die includes a lower die plate 21, a female die 22, a forming punch 23 and a lower punch 24. The female die 22 and the lower punch 24 are fixedly arranged on the top surface of the lower die plate 21, and the forming punch 23 is vertically slidably arranged on the top surface of the lower die plate 21.

[0039] The top surface of the female mold 22 is formed with 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, and the inner cavity of the annular female mold 22 forms a cavity, or a circular groove is 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 die 22. The top surface of the lower punch 24 is not higher than the top surface of the female die 22 and is provided with a punching slot 241. The bottom of the punching punch 13 matches the shape and size of the punching slot 241 and is used to cooperate with the punching slot to punch holes in the blank. The bottom surface of the punching punch 13 is higher than the bottom surface of the male die 12 in the vertical direction, so that the blank can be punched in cooperation with the punching slot 241 after blanking. After blanking is completed, the blank will fall on the lower punch 24 in the female die 22, and the upper template 11 and the lower template 21 continue to approach each other. The punching of the blank is achieved through the cooperation of the punching punch 13 and the punching slot 241.

[0041] The bottom surface of the male die 12 is formed with 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, and is used to enter the cavity on the bottom surface of the male die 12 to flanging the punching position of the blank, such as Figure 3 As shown, after the 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 approach, the lower punch 24 enters the inner cavity of the male mold 12, and the edge of the punching position of the blank is flanging by the lower punch 24;

[0042] The male mold 12 may be in the shape of a ring, and the inner cavity of the ring-shaped male mold 12 may form a cavity, or a circular groove may be provided on the bottom surface of the male mold 12 to form a cavity on the bottom surface of the male mold 12. Figure 1 As shown, in this example, the male mold 12 is in the shape of a circular ring.

[0043] The forming punch 23 is located in the female die 22, and an elastic support member 231 for supporting the forming punch 23 is provided on the lower die plate 21, so that the top surface of the forming punch 23 and the top surface of the female die 22 are kept in the same plane, and a gap is generated between the bottom surface of the forming punch 23 and the top surface of the lower die plate 21. The bottom of the male die 12 and the top of the forming punch 23 are both provided with a contouring surface for forming parts, so that the forming punch 23 is in contact with the bottom surface of the blank during blanking, punching and flanging. The blank is pre-pressed and formed by the elastic force generated by the deformation of the elastic support member 231, and the blank is completely pressed and formed after the bottom surface of the forming punch 23 contacts the top surface of the lower die plate 21, such as Figure 1 As shown, when the male die 12 and the female die 22 clamp the blank and prepare to blank, the forming punch 23 has already abutted against the lower surface of the blank. At this time, the male die 12 enters the female die 22 for blanking. The blank that falls will bend under the drive of the male die 12, and the bent portion of the edge of the blank will press down the forming punch 23, so that the elastic support member 231 between the forming punch 23 and the lower template 21 is compressed. After the elastic support member 231 is compressed, an upward elastic force is generated to act on the bottom surface of the blank through the forming punch 23, and the square surface on the top of the forming punch 23 and the contour surface on the top of the male die 12 are pressed against each other. The preforming of the blank is realized by the cooperation, and the top and bottom surfaces of the blank are supported. In the subsequent punching and flanging process, as the compression of the elastic support member 231 increases, the pressure applied to the blank by the forming punch 23 increases, providing greater supporting force, preventing the blank from wrinkling during punching and flanging, and 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 at the beginning of blanking, and cooperate with the upper male mold 12 to achieve compaction of the blank, preventing the blank from wrinkling during subsequent processing.

[0044] Next, the overall forming process is described in combination with the present scheme. First, the blank is placed on the top surface of the female die 22 so that the male die 12 is located above the blank. At this time, the blank is larger than the vertical projection of the male die 11, and a piece of blank required for the forming part needs to be punched out through the cooperation of the male die 12 and the female die 22. Next, the male die 12 and the punching punch 13 are lowered under the drive of the upper template 11. Since the bottom surface of the punching punch 13 is higher than the bottom surface of the male die 12, the male die 12 first contacts the top surface of the blank, and a piece of blank with the same vertical projection as the male die 12 is punched out on the blank through the cooperation of the male die 12 and the cavity on the top surface of the female die 22. The punched blank falls to the top surface of the lower punch 24 and the forming punch 23, and then the male die 12 continues to descend, and the edge of the pressed blank is bent downward. When the blank bends downward under the action of the male die 12, it drives the forming punch 23 to descend, forcing the elastic support 231 at the bottom end of the forming punch 23 The elastic force generated by the compressed elastic support member 231 acts upward on the bottom surface of the blank through the forming punch 23, causing the blank to deform and preform the blank. Subsequently, the punching punch 13 will contact the top surface of the blank, and the blank will be punched with the cooperation of the punching punch 13 and the punching slot 241. The shape and size of the punching are the same as the shape and size of the vertical projection of the punching punch 13. After the punching is completed, the male mold 12 and the punching punch 13 continue to descend, and the lower punch 24 enters the cavity on the bottom surface of the male mold 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 up. While the turning is in progress, the bottom surface of the forming punch 23 will collide with the top surface of the lower template 21. At this time, the forming punch 23 will not be able to continue to descend, while the male mold 12 is still continuing to descend, and the blank is completely formed by the profiling surface opened on the bottom surface of the male mold 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 starts to stretch and form the blank after blanking, so that the blank is pre-formed before punching, and then the blank is punched, thereby reducing the influence of the blank forming after punching on the shape and size of the hole. At the same time, the outflow of material during the forming process is restrained by the middle solid part of the blank, reducing the thinning trend of the center of the blank, 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 the stretching forming of the blank is carried out simultaneously with the flanging of the blank, which restrains the flow of materials from each other, effectively controls the flow of materials during the forming and flanging processes, makes the wall thickness of the final formed part more uniform, prevents wrinkles, and improves product quality.

[0046] Specifically, the elastic support member 231 adopts a spring, and the two ends of the spring respectively abut against the forming punch 23 and the lower template 21 to achieve elastic installation of the forming punch 23. The number and specifications of the spring are selected according to the specifications of the blank.

[0047] After the punching is completed, the male die 12 continues to descend to flange the blank. After the forming punch 23 abuts against the lower template 21, the forming punch 23 will not be able to continue to descend. The male die 12 continues to descend to flange the blank while fully stretching the blank to finally obtain the part.

[0048] Specifically, the upper mold plate 11 can be raised and lowered in the vertical direction under the drive of the stamping equipment to adjust the distance between the upper mold and the lower mold.

[0049] Further, such as Figure 1 As shown, the bottom surface of the punching punch 13 is not lower than the top of the profiling surface of the male die 12 in the vertical direction. After the male die 12 and the female die 22 complete the blanking, the forming punch 23 will cooperate with the profiling surface opened at the bottom of the male die 12 through the profiling surface opened at its top, and preform the blank under the elastic force of the elastic support 231. When punching, the bottom surface of the punching punch 13 and the top surface of the lower punch 24 need to reach the same height. Because the bottom surface of the punching punch 13 is not lower than the top of the profiling surface opened by the male die 12, before punching begins, the profiling surface opened on the male die 12 will drop below the top surface of the lower punch 24 to cooperate with the forming punch 23, so as to ensure the effect of preforming the blank by the male die 12 and the forming punch 23. Figure 3 As shown, the main part of the cover ring type parts is stepped. The main part of the part has been preliminarily bent and formed before punching and flanging, and the center of the part has not been punched at this time. The material at the center of the blank can be restrained to prevent the center material from flowing outward in large quantities, which helps to improve the uniformity of the wall thickness of the final molded part and improve product quality.

[0050] At the same time, the height difference between the bottom surface of the punching punch 13 and the top of the contoured surface of the male die 12 in the vertical direction does not exceed the thickness of the blank. It is necessary to control the height difference between the bottom surface of the punching punch 13 and the top of the contoured surface of the male die 12 within a reasonable range to prevent a large height difference from affecting the order of punching and flanging of parts.

[0051] like Figure 1As shown, a first push rod 25 is vertically slidably provided on the lower template 21, a top ring 251 is provided on the top of the first push rod 25, and the vertical projection of the top ring 251 falls within the vertical projection range of the male mold 12. A driving member 26 for driving the first push rod 25 to move up and down 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. Before blanking, the top surface of the top ring 251 and the top surface of the female mold 22 are maintained at the same height. A certain amount of supporting force is provided by the driving member 26. When blanking, the bottom surface of the male die 12 contacts the top surface of the blank to apply downward force, and the top surface of the top ring 251 contacts the bottom surface of the blank to apply upward force. The blank is clamped by the male die 12 and the top ring 251 to provide the required blank holding force. In the subsequent blanking, forming, punching and flanging processes, the top ring 251 and the first ejector rod 25 keep descending synchronously with the male die 12 to always provide blank holding force to control the flow of the material and prevent wrinkles.

[0052] After the blank is completely formed and the part is obtained, the first push rod 25 can be driven to rise by the driving member 26, and the first push rod 25 can drive the top ring 251 and the part formed on the top ring 251 to rise. Finally, the top ring 251 will rise to a height 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 annular 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, the lower punch 24 and the lower template 21 are provided with a second push rod 27, the punching slot 241 is provided with a push block 271, one end of the second push rod 27 extends into the punching slot 241 and is connected to the push block 271, and the height from the bottom surface of the second push rod 27 to the top surface of the push block 271 is not less than the sum of the heights of the lower template 21 and the lower punch 24, and the height of the second push rod 27 is adjusted by the driving member 26;

[0055] like Figure 1As shown, in this example, the height from the bottom surface of the second push rod 27 to the top surface of the top block 271 is just equal to the sum of the heights of the lower template 21 and the lower punch 24. After the punching punch 13 cooperates with the punching slot 241 to punch the blank, the waste generated during the punching will fall into the punching slot 241. After the punching is completed, the male mold 12 will continue to descend to form and flanging the blank. Therefore, the punching slot 241 needs to have space for the punching punch 13 to continue to descend. At the same time, the waste generated by the punching will fall to the bottom of the punching slot 241. In order to facilitate the cleaning of the waste generated during the punching after the forming is completed, the second push rod 27 is penetrated in the lower template 21 and the lower punch 24, and the top end of the second push rod 27 extends into the punching slot 241 and is connected to 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 push rod 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. 24, so 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, and 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 just at the same height as the bottom surface of the lower template 21, that is, the waste generated during punching will fall on the top surface of the top block 271, and when the final part molding is completed, the driving member 26 drives the first push rod 25 to rise, and the driving member 26 will also drive the second push rod 27 to rise, and the lifting 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, and because 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, so as to realize the automatic ejection of the part and the punching waste after the part is formed, and facilitate the removal of 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 hole opening position of the blank, the position of the blank that needs to be flanging changes from a horizontal state to a flanging state. In this conversion process, the lower punch 24 supports the blank upward while the male die 12 presses the blank downward. The lower punch 24 pushes the middle hole 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 contacts the outer ring surface of the lower punch 24. In this process, the blank will pass the position where the top surface of the lower punch 24 and the outer ring surface are adjacent. Therefore, a transition arc surface is set between the outer ring surface and the top surface of the lower punch 24, which can make the blank smoother when flanging.

[0057] like Figure 1 As shown, in some examples, a third push rod 14 is vertically inserted into the upper mold plate 11, the bottom end of the third push rod 14 is located in the male mold 12 and fixed with a punching block 141, and the top end protrudes from the top surface of the upper mold plate 11 and is fixed with a punching plate 142, and one side of the punching block 141 is in contact with the inner cavity wall of the male mold 12;

[0058] Generally, the parts will fall into the lower mold after molding and then be ejected by the top ring 251. However, the molded parts may be stuck in the upper mold due to other uncontrollable factors such as vacuum adsorption. Therefore, a third ejector rod 14 is vertically penetrated in the upper mold plate 11, and a block 141 and a plate 142 are installed at the bottom and top of the third ejector rod 14 respectively. If the part is stuck in the upper mold after molding, the knocking force can be transmitted to the part through the third ejector rod 14 and the block 141 by knocking the plate 142, so as 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 disposed 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 by blanking may get stuck on the outer surface of the male mold 12 and rise synchronously with the male mold 12, while the unloading plate 28 sleeved on the outer surface of the male mold 12 can scrape the waste generated by blanking off the male mold 12, thereby realizing automatic separation of the waste and 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, and the T-shaped rod 232 is slidably set in the T-shaped hole opened in the lower template 21 to limit the highest position of the forming punch 23 and prevent the top surface of the forming punch 23 from being higher than the top surface of the lower punch 24.

[0062] Specifically, the driving member 26 is a hydraulic cylinder, such as Figure 1 As shown, a push plate is fixedly provided on the upper end of the piston rod of the hydraulic cylinder, and 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 of the first push rod 25 and the second push rod 27.

[0063] like Figure 1 As shown, a cushion block is provided between the female mold 22 and the lower mold plate 21 to increase the descending stroke of the male mold 12 in the female mold 22. The cushion block can be made of conventional rigid materials, which can reduce the production cost of the entire mold.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold for forming cover ring parts, including an upper mold and a lower mold, characterized in that: The upper die comprises an upper die plate (11), a male die (12) and a punching punch (13), wherein the male die (12) and the punching punch (13) are both fixedly arranged on the bottom surface of the upper die plate (11); The lower die comprises a lower die plate (21), a female die (22), a forming punch (23) and a lower punch (24); the female die (22) and the lower punch (24) are fixedly arranged on the top surface of the lower die plate (21); and the forming punch (23) is vertically slidably arranged on the top surface of the lower die plate (21); The top surface of the female mold (22) is formed with 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) and is used to cooperate with the cavity on the top surface of the female mold (22) to realize blanking; The lower punch (24) is located in the cavity on the top surface of the female die (22), the top surface of the lower punch (24) is not higher than the top surface of the female die (22) and is provided with a punching groove (241), the bottom of the punching punch (13) matches the shape and size of the punching groove (241) and is used to cooperate with the punching groove to punch holes in the blank, and the bottom surface of the punching punch (13) is higher than the bottom surface of the male die (12) in the vertical direction; The bottom surface of the male die (12) is formed with 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 die (12), and is used to enter the cavity on the bottom surface of the male die (12) to flanging the punching position of the blank; The forming punch (23) is located in the cavity on the top surface of the female mold (22), and an elastic support member (231) for supporting the forming punch (23) is provided at the bottom of 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 in the same plane, and a gap is generated between the bottom surface of the forming punch (23) and the top surface of the lower mold plate (21), and the bottom of the male mold (12) and the top of the forming punch (23) are both provided with a contouring surface for forming parts.

2. The cover ring type parts forming mold according to claim 1, characterized in that: The bottom surface of the punching punch (13) is not lower than the top of the contoured surface of the male die (12) in the vertical direction, and the height difference between the bottom surface of the punching punch (13) and the top of the contoured surface of the male die (12) in the vertical direction does not exceed the thickness of the blank.

3. The cover ring parts forming mold according to claim 1, characterized in that: A first push rod (25) is vertically slidably arranged on the lower template (21), a top ring (251) is arranged on the top of the first push rod (25), and the vertical projection of the top ring (251) falls within the vertical projection range of the male mold (12). A driving member (26) for driving the first push rod (25) to move up and down is arranged below the lower template (21), and 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).

4. The cover ring parts forming mold according to claim 3, 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).

5. The cover ring parts forming mold 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 slot (241) is provided with a push block (271), one end of the second push rod (27) extends into the punching slot (241) and is connected to the push block (271), and the height from the bottom surface of the second push rod (27) to the top surface of the push block (271) is not less than the sum of the heights of the lower template (21) and the lower punch (24).

6. The cover ring type parts forming mold according to claim 5, characterized in that: The height from the bottom surface of the second push rod (27) to the top surface of the push 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 driving member (26).

7. The cover ring parts forming mold according to claim 1, characterized in that: A transitional cambered surface is provided between the outer annular surface and the top surface of the lower punch (24).

8. The cover ring parts forming mold according to claim 1, characterized in that: A third push rod (14) is vertically inserted into the upper mold plate (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 fixedly provided with a punching block (141); the top end protrudes from the top surface of the upper mold plate (11) and is fixedly provided with a punching plate (142); one side of the punching block (141) is in contact with the inner cavity wall of the male mold (12).

9. The cover ring parts forming mold according to claim 1, characterized in that: A stripping plate (28) is fixedly arranged on the female mold (22), and the stripping plate (28) is attached to the outer surface of the male mold (12).

10. The cover ring parts forming mold according to claim 1, characterized in that: A T-shaped rod (232) is fixedly provided at the bottom of the forming punch (23), and the T-shaped rod (232) is slidably arranged in a T-shaped hole opened in the lower template (21) to limit the highest position of the forming punch (23).

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