Stamping and riveting die for precise sheet metal part production

Abstract

The invention relates to the technical field of stamping dies, in particular to a stamping and riveting die for precise sheet metal part production, which does not need rivets, can realize self-locking connection of plates, directly utilizes self deformation of sheet metal parts to form connection points, omits purchasing, warehousing and mounting processes of the rivets, greatly simplifies procedures, and improves production efficiency. The material and management cost is reduced, conditions are created for high-speed automatic production, low sensitivity to overall coaxiality errors is achieved through matching of split type fan-shaped shearing and a female die with a spiral guide rib, the guide rib accurately guides each fan-shaped curl, uniform and complete mechanical interlocking is formed, it is ensured that the strength of connecting points is consistent and reliable, and the production efficiency is improved. According to the design, impact force is dispersed to the six fanning strips, vertical stamping is converted into smooth curling, stress distribution is improved, the mold is effectively protected through a built-in spring buffering and linkage demolding mechanism, cracking and abrasion are reduced, the service life of the mold is remarkably prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and more specifically to a stamping and riveting die for the production of precision sheet metal parts. Background Technology

[0002] Precision sheet metal parts production stamping and riveting dies are widely used in the air conditioning manufacturing industry, significantly improving the processing efficiency and quality consistency of sheet metal structural parts, and playing a key role in achieving high-precision, large-scale production.

[0003] Precision sheet metal parts production stamping and riveting dies typically consist of a die body comprising an upper die base, a lower die base, a guiding mechanism, a blank holder, a punch, and a riveting module, achieving precise alignment and pressure control. The drive system provides the stamping power; the control system is responsible for adjusting process parameters and coordinating operation; and the execution section is equipped with specialized tools such as punching cutters, riveting heads, and forming blocks according to specific processes. These systems work together to complete multiple processes in sheet metal production, including punching, flanging, riveting, and forming, exhibiting high rigidity, high stability, and process integration. However, the above-mentioned working method still has the following shortcomings: 1. Traditional riveting requires the additional purchase, management and installation of separate rivets (solid or blind rivets), which is cumbersome, costly and inefficient due to the low efficiency of manual rivet insertion, becoming a bottleneck for automated production; 2. The punch and die of traditional riveting dies are prone to coaxiality deviation due to machining errors or wear, resulting in rivet misalignment, weak riveting or workpiece damage, large fluctuations in connection strength, and potential quality hazards. 3. When traditional molds are subjected to eccentric force or oblique stamping, local stress concentration occurs in the punch and die, resulting in abnormal cracking. The lifespan is far less than the design requirements, requiring frequent replacement and high maintenance costs.

[0004] Therefore, the present invention provides a stamping and riveting die for the production of precision sheet metal parts. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a stamping and riveting die for the production of precision sheet metal parts, so as to solve the problems existing in the background art.

[0006] This invention provides the following technical solution: a stamping and riveting die for precision sheet metal parts production, wherein two guide pillars are fixedly connected to the top of the lower die base, a die cavity is provided in the middle of the lower die base, an inner fixing sleeve is provided inside the die cavity, a rotating disk is provided inside the inner fixing sleeve, a support frame is provided at the top of the inner fixing sleeve, a spiral guide rib is provided on the outer side of the rotating disk, an upper die base is provided above the lower die base, two guide sleeves are fixedly connected to the bottom of the upper die base, a punch is provided in the middle of the upper die base, a punch outer sleeve is provided at the top of the punch, a punch inner sleeve is provided inside the punch, a protrusion is provided on the outer side of the punch inner sleeve, and an upper pre-pressing block is provided inside the punch inner sleeve.

[0007] Furthermore, the bottom of the die cavity is provided with a die cavity outer sleeve, the inner bottom surface of the die cavity outer sleeve is fixedly connected with a first spring, the top of the first spring is provided with a die cavity inner sleeve, the top of the die cavity inner sleeve is fixedly connected with a lower preload ring, and the top of the lower preload ring is fixedly connected with ten gaskets.

[0008] Furthermore, a lower circular blade is provided at the top center of the support frame, six lower blade strips are fixedly connected to the outer side of the lower circular blade, a push block is provided on the inner side of the lower circular blade, a second spring is fixedly connected to the bottom of the push block, and a tapered guide block is provided at the bottom of the support frame.

[0009] Furthermore, six guide posts are fixedly connected to the side of the rotating disk, a linkage ring is provided on the outer side of the rotating disk, the inner side of the linkage ring is fixedly connected to the outer side of the guide posts, a guide rib fixing ring is provided on the upper part of the linkage ring, the six spiral guide ribs are evenly distributed on the side of the guide rib fixing ring, and a third spring is fixedly connected to the bottom of the rotating disk.

[0010] Furthermore, the inner fixing sleeve has six guide grooves on its side, a fixing groove at its bottom, a flattening pad fixedly connected to the outside of the fixing groove, six die-forging parts fixedly connected to the top of the flattening pad, and three rigid pads fixedly connected to the top of the die-forging parts.

[0011] Furthermore, a first base is fixedly connected to the inner top surface of the outer casing of the punch, a fourth spring is fixedly connected to the bottom of the first base, a fifth spring is provided on the outer side of the fourth spring, the top of the fifth spring is fixedly connected to the inside of the outer casing of the punch, a second base is provided inside the outer casing of the punch, the top of the second base is fixedly connected to the bottom of the fifth spring, the tops of the six protrusions are fixedly connected to the bottom of the second base, the top of the inner casing of the punch is fixedly connected to the bottom of the fourth spring, and a preload spring is provided inside the inner casing of the punch.

[0012] Furthermore, the inner top surface of the punch barrel is provided with six third bases, the bottom of the third bases is fixedly connected to the top of the preload spring, the inner surface of the punch barrel is provided with six limiting grooves, the bottom center of the punch barrel is provided with an upper circular blade, the outer side of the upper circular blade is fixedly connected with an upper blade strip, the middle of the upper circular blade is provided with an upper push block, and the top of the upper push block is fixedly connected with a sixth spring.

[0013] Furthermore, a connecting block is fixedly connected to the side of the upper preload block, and the bottom of the preload spring and the top of the upper preload block are fixedly connected.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention adopts a rivetless self-locking connection, which directly utilizes the deformation of the sheet metal parts themselves to form connection points, completely eliminating the procurement, storage, feeding and installation processes of rivets, greatly simplifying the production process, reducing material and management costs, and clearing the way for high-speed automated production.

[0015] 2. This invention employs a die capable of segmented fan-shaped shearing and guided by guide ribs. Its segmented curling forming is insensitive to overall coaxiality errors. The guide ribs can precisely guide the curling of each fan-shaped piece, ensuring the formation of a uniform and complete mechanical interlocking structure, thereby guaranteeing that each connection point has consistent and superior connection strength.

[0016] 3. This invention disperses the concentrated impact force onto multiple fan-shaped pieces by segmented shearing of sheet metal parts, and transforms the vertical punching force into a smooth curling force through the curved surface guidance of the guide ribs, which greatly improves the stress distribution. At the same time, the built-in spring buffer and linkage demolding mechanism further protect the mold, significantly reducing cracking and wear, thereby extending the service life of the mold by many times and reducing the maintenance frequency and total cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the concave mold structure of the present invention.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along direction A.

[0020] Figure 4 This is a schematic diagram of the internal structure of the die of the present invention.

[0021] Figure 5 This is a schematic diagram of the support frame structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the rotating disk structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the internal fixing sleeve structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the punch structure of the present invention.

[0025] Figure 9 For the present invention Figure 8 Schematic diagram of the cross-sectional structure along direction B.

[0026] Figure 10 This is a schematic diagram of the bump structure of the present invention.

[0027] Figure 11 This is a schematic diagram of the inner barrel structure of the punch of the present invention.

[0028] Figure 12 This is a schematic diagram of the upper pre-compression block structure of the present invention.

[0029] The attached figures are labeled as follows: 1. Lower mold base; 11. Upper mold base; 12. Guide post; 13. Guide sleeve; 2. Die cavity; 21. Outer sleeve of die cavity; 211. First spring; 22. Inner sleeve of die cavity; 221. Lower preload ring; 2211. Shim; 23. Support frame; 231. Lower circular blade; 2311. Lower blade strip; 232. Lower push block; 2321. Second spring; 233. Conical guide block; 24. Rotary disk; 241. Guide post; 242. Linkage ring; 243. Third spring; 244. Guide rib fixing ring; 245. Spiral guide rib; 25. 251. Inner fixed sleeve; 252. Guide groove; 253. Fixing groove; 26. Flattening pad; 261. Die die; 262. Rigid pad; 3. Punch; 31. Punch outer sleeve; 311. First base; 312. Fourth spring; 313. Fifth spring; 32. Second base; 321. Protrusion; 33. Punch inner sleeve; 331. Third base; 332. Limiting groove; 333. Upper circular blade; 334. Upper blade strip; 335. Upper push block; 3351. Sixth spring; 34. Upper preload block; 341. Connecting block; 342. Preload spring. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The stamping and riveting die for precision sheet metal production involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figure 1 , Figure 3 and Figure 9 This invention provides a stamping and riveting die for precision sheet metal parts production. The lower die base 1 has two guide pillars 12 fixedly connected to its top. A die cavity 2 is provided in the middle of the lower die base 1. An inner fixing sleeve 25 is provided inside the die cavity 2. A rotating disk 24 is provided inside the inner fixing sleeve 25. A support frame 23 is provided on the top of the inner fixing sleeve 25. A spiral guide rib 245 is provided on the outside of the rotating disk 24. An upper die base 11 is provided above the lower die base 1. Two guide sleeves 13 are fixedly connected to the bottom of the upper die base 11. A punch 3 is provided in the middle of the upper die base 11. A punch outer sleeve 31 is provided on the top of the punch 3. A punch inner sleeve 33 is provided inside the punch 3. A protrusion 321 is provided on the outside of the punch inner sleeve 33. An upper pre-pressing block 34 is provided inside the punch inner sleeve 33.

[0032] Guided by the guide post 12 and guide sleeve 13, the centers of the upper and lower dies are aligned, preventing damage to the dies due to misalignment. The rotary disk 24 can rotate and move the spiral guide rib 245 on its side according to the stamping action of the punch 3 on the sheet metal part, so that the spiral guide rib 245 can rotate out from the inside of the formed fan-shaped roll, preventing the subsequent stamping action from pressing the spiral guide rib 245 into the inside of the sheet metal part. The upper pre-pressing block 34 contacts the upper surface of the sheet metal part first during the downward movement of the punch 3, thereby pre-pressing the sheet metal part to prevent displacement of the two plates in subsequent work and improve processing accuracy. The upper and lower sheet metal parts are split and cut by the die to form multiple fan-shaped pieces, and then bent, so that the conical guide block 233 can guide the fan-shaped pieces in orientation. Then, the spiral guide rib 245 bends the fan-shaped pieces into rolls, and the rolls are distributed on the lower surface of the sheet metal part. Then, through compression, the rolls are made to fit tightly against the lower surface of the sheet metal part, thereby completing the stamping and riveting work.

[0033] Reference Figure 2 and Figure 3 The bottom of the die 2 is provided with a die outer sleeve 21. The bottom surface of the die outer sleeve 21 is fixedly connected with a first spring 211. The top of the first spring 211 is provided with a die inner sleeve 22. The top of the die inner sleeve 22 is fixedly connected with a lower preload ring 221. The top of the lower preload ring 221 is fixedly connected with ten gaskets 2211.

[0034] The action of the first spring 211 on the bottom of the inner sleeve 22 of the die ensures that the lower pre-pressure ring 221 at the top of the inner sleeve 22 of the die is always pressed against the lower surface of the sheet metal part. Combined with the action of the upper pre-pressure block 34 on the upper surface of the sheet metal part, the pre-pressure treatment before subsequent work is ensured to prevent slippage between the two sheet metal parts. At the same time, the ten shims 2211 at the top of the lower pre-pressure ring 221 can prevent damage to the surface of the sheet metal part during the pre-pressure process.

[0035] Reference Figure 4 and Figure 5The support frame 23 has a lower circular blade 231 at the top center, six lower blade strips 2311 are fixedly connected to the outside of the lower circular blade 231, a push block 232 is provided on the inside of the lower circular blade 231, a second spring 2321 is fixedly connected to the bottom of the push block 232, and a conical guide block 233 is provided at the bottom of the support frame 23.

[0036] The lower circular blade 231 punches and cuts the middle part of the sheet metal part, while the six lower blades 2311 punch and divide the sheet metal part into six independent fan-shaped pieces. The outer ring of the fan-shaped pieces remains connected to the sheet metal part, providing raw material for subsequent fixing. No additional rivets are needed, making full use of the sheet metal part's own material, reducing the operation of placing rivets, and improving work efficiency. The second spring 2321 and the lower push block 232 work together to push out the divided circular pieces, preventing the circular pieces from accumulating inside the support frame 23.

[0037] Reference Figure 6 The rotating disk 24 has six guide posts 241 fixedly connected to its side. A linkage ring 242 is provided on the outer side of the rotating disk 24. The inner side of the linkage ring 242 is fixedly connected to the outer side of the guide posts 241. A guide rib fixing ring 244 is provided on the upper part of the linkage ring 242. Six spiral guide ribs 245 are evenly distributed on the side of the guide rib fixing ring 244. A third spring 243 is fixedly connected to the bottom of the rotating disk 24.

[0038] Six guide posts 241 restrict and guide the movement of the rotating disk 24, ensuring that the subsequent guide rib fixing ring 244 drives the spiral guide rib 245 to move. At the same time, the third spring 243 resets the rotating disk 24, thereby ensuring the continuous operation of the device. The fan-shaped piece moves along the inside of the spiral guide rib 245 and is rolled upward under the punching of the punch 3.

[0039] Reference Figure 4 and Figure 7 The inner fixing sleeve 25 has six guide grooves 251 on its side and a fixing groove 252 at its bottom. A flattening pad 26 is fixedly connected to the outside of the fixing groove 252. Six die upsetting parts 261 are fixedly connected to the top of the flattening pad 26. Three rigid pads 262 are fixedly connected to the top of the die upsetting parts 261.

[0040] The downward movement of the punch 3 pushes the six guide posts 241 on the side of the rotating disk 24 to move along the guide groove 251, so that the rotating disk 24 drives the spiral guide rib 245 to move downward first. Then the rotating disk 24 drives the spiral guide rib 245 to rotate at a certain angle, so that the spiral guide rib 245 rotates out from the inside of the rolled fan-shaped sheet. Then it moves downward again, so that the spiral guide rib 245 enters the gap between the die upsetting parts 261, leaving space for the subsequent compression process, while protecting the spiral guide rib 245 from being crushed.

[0041] Reference Figure 8 and Figure 9 The top surface of the outer casing 31 of the punch is fixedly connected to a first base 311. The bottom of the first base 311 is fixedly connected to a fourth spring 312. A fifth spring 313 is provided on the outside of the fourth spring 312. The top of the fifth spring 313 is fixedly connected to the inside of the outer casing 31 of the punch. The inside of the outer casing 31 of the punch is provided to a second base 32. The top of the second base 32 is fixedly connected to the bottom of the fifth spring 313. The tops of the six protrusions 321 are fixedly connected to the bottom of the second base 32. The top of the inner casing 33 of the punch is fixedly connected to the bottom of the fourth spring 312. The inside of the inner casing 33 of the punch is provided to a preload spring 342.

[0042] The fourth spring 312 enables the inner barrel 33 of the punch to automatically return to its initial position after shearing. The fifth spring 313 only provides a certain basic pre-compression for the protrusion 321. When it exceeds its bearing capacity, the outer barrel 31 of the punch pushes the protrusion 321 at the bottom of the second base 32 to move downward, and finally compresses the roll formed by the fan-shaped sheet to provide stable pressure.

[0043] Reference Figure 10 and Figure 11 The inner top surface of the punch inner barrel 33 is provided with six third bases 331. The bottom of the third base 331 is fixedly connected to the top of the preload spring 342. The inner barrel 33 of the punch has six limiting grooves 332. The bottom center of the inner barrel 33 of the punch is provided with an upper circular blade 333. An upper blade strip 334 is fixedly connected to the outside of the upper circular blade 333. An upper push block 335 is provided in the middle of the upper circular blade 333. A sixth spring 3351 is fixedly connected to the top of the upper push block 335.

[0044] Reference Figure 12 A connecting block 341 is fixedly connected to the side of the upper preload block 34, and the bottom of the preload spring 342 is fixedly connected to the top of the upper preload block 34.

[0045] The six upper pre-compression blocks 34 are connected by the connecting block 341 to ensure that the six upper pre-compression blocks 34 move synchronously. The upper pre-compression blocks 34 perform a preliminary bending operation on the stamped and divided fan-shaped sheets, providing pretreatment for the subsequent rolling process of the fan-shaped sheets. At the same time, the movement of the upper pre-compression blocks 34 is guided by the limiting groove 332.

[0046] The working principle of this invention: During the pressing and cutting stage, firstly, under external pressure, the upper die holder 11 drives the punch 3 to move downward along the guide post 12. Under the action of the pre-compression spring 342 and the fourth spring 312, the upper pre-compression block 34 and the punch 321 contact the sheet metal part before the upper blade 334. The punch 321 installed in the middle of the punch outer sleeve 31 contacts the two layers of sheet metal parts to be connected first. Combined with the pushing action of the first spring 211 on the lower pre-compression ring 221, the sheet metal part is pressed tightly against the upper surface of the lower die pad 2211. The pad 2211 restricts the planar movement of the workpiece, ensuring accurate stamping position. At this time, the upper end of the support frame 23 is close to the lower surface of the sheet metal part. The blade group on the upper end face of the support frame 23 and the blade group on the lower end face of the punch inner sleeve 33 are also connected. The components correspond to each other to facilitate subsequent operations. As the punch 3 continues to descend, the pre-compression spring 342 inside the punch inner barrel 33 is compressed, causing the blade assembly on the lower end face of the punch inner barrel 33 to contact the upper surface of the sheet metal part. Under the combined action of the upper circular blade 333 and the lower circular blade 231, a circular hole is cut out at the center of the sheet metal part. The cut waste is clamped between the upper push block 335 and the lower push block 232. At the same time, under the combined shearing action of the six lower blades 2311 and the upper blades 334, the sheet metal part is formed into six independent fan-shaped pieces. The outer ring of the fan-shaped pieces is connected to the sheet metal part. Under the pushing action of the pre-compression spring 342, the upper pre-compression block 34 pushes the six independent fan-shaped pieces after division downward from the center, causing the independent fan-shaped pieces to bend downward by ninety degrees around the outer ring line.

[0047] During the curling stage, the punch 3 continues to move downwards. At this time, the fourth spring 312 at the upper end of the punch inner barrel 33 is compressed, causing the punch inner barrel 33 to no longer follow the punch 3 downwards. Only through the action of the preload spring 342 on the upper preload block 34, the initial bending of the independent sector pieces is achieved. During the continued downward movement of the punch 3, the fifth spring 313 at the rear end of the second base 32 is compressed. When the fifth spring 313 is fully compressed, it pushes the second base 32 downwards through the inner end face of the punch outer barrel 31, thereby causing the protrusion 321 to push the sheet metal part downwards. The sheet metal part drives the six bent independent sector pieces downwards. At this time, the lower preload ring 221 is in Under the action of the first spring 211, a certain pressure is maintained on the sheet metal part, while moving downward to prevent the sheet metal part from shifting. The lower ends of the six independent fan-shaped pieces after bending contact the conical guide block 233. During the continuous downward movement of the sheet metal part, the conical guide block 233 guides the ends of the fan-shaped pieces to the entrance of the spiral guide rib 245. The punch 3 continues to drive the sheet metal part to move downward. Under the guidance of the spiral guide rib 245, the fan-shaped pieces curl upward along their contour. After curling completely, the protrusion 321 at the bottom of the punch 3 continues to drive the sheet metal part to move downward. The curled fan-shaped pieces drive the linkage ring 242 to move downward, so that the third spring 243 at the bottom of the rotating disk 24 is compressed.

[0048] In the final forming stage, the six guide pillars 241 around the rotating disk 24 are guided by the guide groove 251, causing the rotating disk 24 to rotate as it moves downward, driving the spiral guide ribs 245 on the guide rib fixing ring 244 to rotate. This causes the spiral guide ribs 245 to detach from the coiled independent fan-shaped pieces. As the protrusion 321 continues to drive the sheet metal part downward, the spiral guide ribs 245 align and enter the gap between the lower die upsetting parts 261, providing space for subsequent compression molding. Finally, through the compression between the protrusion 321 and the die upsetting parts 261, the coiled fan-shaped pieces are compressed and pressed tightly against the lower surface of the sheet metal part, thus completing the fixing of the two sheet metal parts. Subsequently, the protrusion 3 stops moving downward and rises. Under the action of the springs, each mechanism returns to its initial position. The cut circular pieces are pushed out by the combined action of the second spring 2321 and the sixth spring 3351 to prevent accumulation.

[0049] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, 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 stamping and riveting die for precision sheet metal part production, comprising a lower die seat (1), characterized in that: The top of the lower die seat (1) is fixedly connected with two guide columns (12), the middle part of the lower die seat (1) is provided with a concave die (2), the inside of the concave die (2) is provided with an inner fixing sleeve (25), the inside of the inner fixing sleeve (25) is provided with a rotating disc (24), the top of the inner fixing sleeve (25) is provided with a support frame (23), the outer side of the rotating disc (24) is provided with a spiral guide rib (245), the upper side of the lower die seat (1) is provided with an upper die seat (11), the bottom of the upper die seat (11) is fixedly connected with two guide sleeves (13), the middle part of the upper die seat (11) is provided with a convex die (3), the top of the convex die (3) is provided with a convex die outer sleeve barrel (31), the inside of the convex die (3) is provided with a convex die inner barrel (33), the outer side of the convex die inner barrel (33) is provided with a convex block (321), and the inside of the convex die inner barrel (33) is provided with an upper pre-pressing block (34).

2. The stamping and riveting die for producing a precision sheet metal part according to claim 1, characterized in that: The bottom of the concave die (2) is provided with a concave die outer sleeve barrel (21), the inside bottom surface of the concave die outer sleeve barrel (21) is fixedly connected with a first spring (211), the top of the first spring (211) is provided with a concave die inner sleeve barrel (22), the top of the concave die inner sleeve barrel (22) is fixedly connected with a lower pre-pressing ring (221), and the top of the lower pre-pressing ring (221) is fixedly connected with ten gaskets (2211).

3. The stamping and riveting die for producing a precision sheet metal part according to claim 1, characterized in that: The top center of the support frame (23) is provided with a lower circular blade (231), the outer side of the lower circular blade (231) is fixedly connected with six lower blades (2311), the inner side of the lower circular blade (231) is provided with a lower push block (232), the bottom of the lower push block (232) is fixedly connected with a second spring (2321), and the bottom of the support frame (23) is provided with a conical guide block (233).

4. The stamping and riveting die for producing a precision sheet metal part according to claim 1, characterized in that: The side of the rotating disc (24) is fixedly connected with six guide columns (241), the outer side of the rotating disc (24) is provided with a linkage ring (242), the inner side surface of the linkage ring (242) and the outer side surface of the guide column (241) are fixedly connected, the upper part of the linkage ring (242) is provided with a guide rib fixing ring (244), six spiral guide ribs (245) are uniformly distributed on the side of the guide rib fixing ring (244), and the bottom of the rotating disc (24) is fixedly connected with a third spring (243).

5. The stamping and riveting die for producing a precision sheet metal part according to claim 1, characterized in that: The side of the inner fixing sleeve (25) is provided with six guide grooves (251), the bottom of the inner fixing sleeve (25) is provided with a fixing groove (252), the outer side of the fixing groove (252) is fixedly connected with a flattening pad (26), the top of the flattening pad (26) is fixedly connected with six concave die upsetting pieces (261), and the top of the concave die upsetting piece (261) is fixedly connected with three rigid pads (262).

6. The stamping and riveting die for producing a precision sheet metal part according to claim 1, characterized in that: The top surface of the outer casing of the punch (31) is fixedly connected to a first base (311), the bottom of the first base (311) is fixedly connected to a fourth spring (312), a fifth spring (313) is provided on the outside of the fourth spring (312), the top of the fifth spring (313) is fixedly connected to the inside of the outer casing of the punch (31), the inside of the outer casing of the punch (31) is provided to a second base (32), the top of the second base (32) is fixedly connected to the bottom of the fifth spring (313), the top of the six protrusions (321) is fixedly connected to the bottom of the second base (32), the top of the inner casing of the punch (33) is fixedly connected to the bottom of the fourth spring (312), and a preload spring (342) is provided inside the inner casing of the punch (33).

7. The stamping and riveting die for producing a precision sheet metal part according to claim 6, characterized in that: The inner top surface of the punch inner barrel (33) is provided with six third bases (331). The bottom of the third base (331) is fixedly connected to the top of the preload spring (342). The inner surface of the punch inner barrel (33) is provided with six limiting grooves (332). The bottom center of the punch inner barrel (33) is provided with an upper circular blade (333). An upper blade strip (334) is fixedly connected to the outer side of the upper circular blade (333). An upper push block (335) is provided in the middle of the upper circular blade (333). A sixth spring (3351) is fixedly connected to the top of the upper push block (335).

8. The stamping and riveting die for producing a precision sheet metal part according to claim 6, characterized in that: The upper preload block (34) is fixedly connected to a connecting block (341) on its side, and the bottom of the preload spring (342) is fixedly connected to the top of the upper preload block (34).

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