A stamping die for processing flange nuts

Abstract

This invention belongs to the field of metal forming machine tool manufacturing technology, specifically a stamping die for processing flange nuts. It includes a machine body, a base plate fixed to the upper surface of the machine body, a rotating disk rotatably connected to the upper surface of the base plate, and several limiting grooves on the circumferential surface of the rotating disk. A support platform is fixed to one side of the machine body, and a first hydraulic cylinder is fixed to the upper surface of the support platform. An auxiliary die is fixed to the output end of the first hydraulic cylinder. A stamping plate is provided on the top wall of the machine body. Several fixing components are provided inside the rotating disk. Each fixing component includes a first groove inside the rotating disk, a miniature vacuum pump elastically connected to the first groove, a positioning frame fixed to one end of the miniature vacuum pump, and a positioning tube fixed inside the positioning frame. The positioning frame can fit snugly against the circumferential surface of a tubular workpiece. By setting the fixing components and auxiliary components, the problem of misalignment of the tubular workpiece is solved.

Description

Technical Field

[0001] This invention belongs to the field of metal forming machine tool manufacturing technology, specifically a stamping die for processing flange nuts. Background Technology

[0002] Flange nuts, also known as washer nuts, toothed nuts, hexagonal flange nuts, or flange caps, are widely used in pipe connections or in workpieces where the contact surface of the nut needs to be increased. Currently, in the manufacturing of flange nuts, hydraulic hammer stamping is a commonly used technique, and most flange nuts are manufactured using this method.

[0003] A patent with publication number CN214768346U discloses a stamping die for processing flange nuts, including a base plate, a top plate, and an upper die assembly. The workpiece is pushed into the die cavity on the lower die table by a feeding assembly. At this time, the motor drives the lower die table to rotate and moves the workpiece below the upper die assembly in conjunction with the arc-shaped limiting component. Then, the first cylinder pushes the movable component, which moves along the direction set by the slider and cooperates with the lower die table to hold the workpiece. Then, the second cylinder pushes the upper die to cooperate with the lower die table to stamp the workpiece. After stamping, the workpiece follows the rotation of the lower die table and falls into the guide plate in the unloading groove for discharge.

[0004] However, in the existing stamping die process for flange nut processing, the tubular workpiece is first pushed into the die slot, then the turntable is rotated to load the next tubular workpiece, while the previous tubular workpiece is transferred to the underside of the stamping plate. The flange nut is formed by the downward pressure of the stamping plate. However, after the tubular workpiece is loaded into the die slot, it is only limited by the baffles on the edge of the turntable, and a gap is intentionally left between the baffles to facilitate unloading. This makes it very easy for the tubular workpiece to shift to a certain extent between the baffles during the transfer process. When the other half of the mold pushes and limits the tubular workpiece, the workpiece tilts between the two mold slots and leans against them. Even if it appears to be aligned within the tubular slot later, this tilted state has already caused the workpiece to shift upwards. During the subsequent stamping process, the workpiece will experience uneven stress, leading to deviations in the dimensions of the formed flange nut, affecting the product's accuracy and quality. Furthermore, it may cause the workpiece to crack, deform, or be damaged, resulting in not only a waste of raw materials but also reduced production efficiency and increased production costs.

[0005] Therefore, the present invention provides a stamping die for processing flange nuts. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A stamping die for processing flange nuts according to the present invention includes a machine body, a base plate fixedly connected to the upper surface of the machine body, a rotating disk rotatably connected to the upper surface of the base plate, a plurality of limiting grooves opened on the circumferential surface of the rotating disk, a support platform fixedly connected to one side of the machine body, a first hydraulic cylinder fixedly connected to the upper surface of the support platform, an auxiliary die fixedly connected to the output end of the first hydraulic cylinder, a stamping plate provided on the top wall of the machine body, a blanking plate fixedly connected to one side of the machine body, an inclined blanking groove opened inside the blanking plate, an arc-shaped groove opened on one side of the machine body, the arc-shaped groove being used to drop the stamped flange nut, a plurality of fixing components provided inside the rotating disk, the fixing components including a first groove opened inside the rotating disk, a micro air pump elastically connected inside the first groove, a positioning frame fixedly connected to one end of the micro air pump, a positioning tube fixedly connected inside the positioning frame, the positioning frame being able to fit against the circumferential surface of the tubular workpiece;

[0008] The chassis is equipped with an auxiliary component for applying auxiliary lubricant to the inner wall of the stamping plate and tubular workpiece.

[0009] Preferably, the fixing assembly further includes multiple telescopic tubes fixed to the inner wall of the first groove, and springs are sleeved on the circumferential surface of the multiple telescopic tubes, with one end of the springs fixed to a micro air pump.

[0010] Preferably, a rubber flexible plate is fixed to one end of the positioning frame. The rubber flexible plate is the skirt of the positioning frame. After it is attached to the tubular workpiece, it seals the edge of the positioning frame, so that the positioning frame can perform air suction and adsorption fixation of the tubular workpiece by a micro air pump.

[0011] Preferably, the auxiliary component includes a first cavity, in which a limiting tube is fixedly connected. One end of the limiting tube is slidably connected to an arc-shaped block. A groove is provided on one side of the arc-shaped block. The arc-shaped block moves upward by cooperating with the groove and the limiting tube. A trigger is provided on one side of the micro air pump. The trigger drives the arc-shaped block to move upward, thereby limiting the tubular workpiece.

[0012] Preferably, the limiting tube has a connecting groove inside, a slot is provided at the end of the limiting tube, a cone block is fixed to the bottom of the sliding groove, a positioning hole is provided on one side of the cone block, and a spray hole is provided on the surface of the arc block, with the positioning hole communicating with the spray hole.

[0013] Preferably, the trigger drives the arc-shaped block to move upward along the limiting tube. The cross-section of the arc-shaped block is semi-circular and has the same diameter as the inner circle of the tubular workpiece. After the arc-shaped block moves upward, it performs limiting and correction work on the tubular workpiece with the arc-shaped positioning frame. After completion, the arc-shaped block moves downward, the positioning frame continues to attract the tubular workpiece, and at the same time, the rotating disk drives the tubular workpiece to be transferred to the bottom of the stamping plate for stamping.

[0014] Preferably, after the sliding groove on one side of the arc-shaped block abuts against the limiting tube, the cone block on the bottom wall of the sliding groove is inserted into the slot of the limiting tube. After being inserted into the slot, the cone block abuts against the pressure sensor on the top wall of the slot. At this time, the connecting groove is aligned with the positioning hole. Then, the pressure pump inside the chassis pressurizes and sprays out the lubricant stored inside. The lubricant flows along the connecting groove to the positioning hole, and then passes through the spray holes on the surface of the arc-shaped block and is sprayed onto the inner wall of the arc-shaped block.

[0015] Preferably, the trigger includes a first rack plate fixed to one end of a micro air pump, a gear rotatably connected to the inner wall of the first groove, the first rack plate meshing with the gear, a second rack plate meshing below the gear, a connecting plate fixed to the lower surface of the second rack plate, the connecting plate rotatably disposed in the first cavity, and an inclined plate fixed to one end of the connecting plate for lifting the arc-shaped block.

[0016] Preferably, after the tubular workpiece is pushed into the limiting groove, the tubular workpiece squeezes the positioning frame into the first groove. During the retraction of the positioning frame, a micro air pump is pushed, which drives the first rack plate to slide. The sliding of the first rack plate drives the gear meshing with it to rotate. The rotation of the gear drives the second rack plate to slide in the opposite direction to the sliding direction of the first rack plate. The sliding of the second rack plate drives the connecting plate to slide in the first groove. The sliding of the connecting plate drives the inclined plate to slide towards the arc block, thereby driving the arc block to move upward to perform the limiting and correction work while simultaneously performing the lubricant spraying work on the tubular workpiece.

[0017] Preferably, a sealing element is provided at the position of the arc-shaped block on the chassis. The sealing element includes a rotating shaft fixed inside the chassis. A torsion spring is sleeved on the circumferential surface of the rotating shaft. Rotating arc plates are fixed at both ends of the torsion spring. The diameter of the rotating arc plates is smaller than the inner diameter of the tubular workpiece.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The stamping die for flange nut processing described in this invention improves the accuracy and efficiency of stamping through multiple synergistic processes. First, the cone-slot positioning structure of the arc-shaped block slide and the limiting tube uses a pressure sensor to precisely trigger the lubricant spraying process, ensuring that the lubricant is sprayed out only through the directional channel of the connecting groove and the positioning hole when the arc-shaped block is fully in place. This avoids waste while ensuring uniform coverage of the inner wall of the workpiece, effectively reducing the stamping friction coefficient, extending the die life, and improving the surface quality of the product. Second, the linkage limiting and correction function of the semi-circular arc-shaped block and the positioning frame automatically corrects the workpiece position deviation during the upward movement by making contact with the inner wall of the workpiece. Combined with the continuous negative pressure adsorption of the positioning frame, a double fixation guarantee is formed, eliminating the risk of displacement during the stamping process. This is especially suitable for the forming and processing of high-precision flange nuts. Finally, the mechanical linkage design of the lubrication and correction processes ensures that the workpiece remains stable and fixed after the arc-shaped block moves downward, achieving a seamless connection between "correction-lubrication-stamping". This significantly shortens the production cycle, improves the ability of automated continuous operation, and has both technical reliability and economic advantages.

[0020] 2. The stamping die for processing flange nuts described in this invention automatically triggers the retraction of the positioning frame when the tubular workpiece is pushed in. Through the reverse transmission mechanism of rack and pinion, the second rack plate drives the connecting plate and the inclined plate to move in linkage. Only a single workpiece placement action is needed to simultaneously complete the limit correction of the arc block's upward movement and the preparation for lubricant spraying. This "one-touch multi-action" mechanical transmission does not require additional drive components and manual operation steps, improving the tightness of process connection. While reducing costs, it significantly improves production cycle and processing stability, and is especially suitable for high-efficiency operation scenarios in automated production lines. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0023] Figure 2 This is a cross-sectional view of the body of the present invention;

[0024] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a schematic diagram of the structure of the fixing component of the present invention;

[0026] Figure 5 This is a front view of the fixing component of the present invention;

[0027] Figure 6 This is a bottom view of the fixing component of the present invention;

[0028] Figure 7This is a cross-sectional view of the arc-shaped block of the present invention;

[0029] In the diagram: 1. Machine body; 11. Chassis; 12. Rotary disc; 13. Feeding plate; 14. Feeding chute; 15. Limiting groove; 16. Support platform; 17. First hydraulic cylinder; 18. Auxiliary mold; 19. Stamping plate; 110. Arc groove;

[0030] 2. First cavity; 21. Miniature air pump; 22. Positioning frame; 23. Positioning tube; 24. Rubber flexible plate; 25. Multi-section telescopic tube; 26. Spring; 27. First rack plate; 28. Gear; 29. ​​Second rack plate; 210. Connecting plate; 211. Inclined plate; 212. Arc block; 213. Limiting tube; 214. Slide groove; 215. Slot; 216. Conical block; 217. Positioning hole; 218. Spray hole; 219. Rotating shaft; 220. Torsion spring; 221. Rotating arc plate; 222. First groove; 223. Connecting groove. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1: As Figures 1 to 7 As shown in the figure, a stamping die for processing flange nuts according to an embodiment of the present invention includes a machine body 1. A base 11 is fixedly connected to the upper surface of the machine body 1. A rotating disk 12 is rotatably connected to the upper surface of the base 11. A plurality of limiting grooves 15 are formed on the circumferential surface of the rotating disk 12. A support platform 16 is fixedly connected to one side of the machine body 1. A first hydraulic cylinder 17 is fixedly connected to the upper surface of the support platform 16. An auxiliary mold 18 is fixedly connected to the output end of the first hydraulic cylinder 17. A stamping plate 19 is provided on the top wall of the machine body 1. A blanking plate 13 is fixedly connected to one side of the machine body 1. The feeding plate 13 has an inclined feeding groove 14 inside, and the machine body 1 has an arc groove 110 on one side. The arc groove 110 is used to drop the stamped flange nut. The rotating disk 12 has several fixing components inside. The fixing components include a first groove 222 inside the rotating disk 12. A micro air pump 21 is elastically connected inside the first groove 222. A positioning frame 22 is fixedly connected to one end of the micro air pump 21. A positioning tube 23 is fixedly connected inside the positioning frame 22. The positioning frame 22 can fit against the circumferential surface of the tubular workpiece.

[0033] The fixing assembly also includes a multi-section telescopic tube 25 fixedly connected to the inner wall of the first groove 222. A spring 26 is sleeved on the circumferential surface of the multi-section telescopic tube 25, and one end of the spring 26 is fixedly connected to the micro air pump 21.

[0034] One end of the positioning frame 22 is fixed with a rubber soft plate 24. The rubber soft plate 24 is the skirt of the positioning frame 22. After it is attached to the tubular workpiece, the edge of the positioning frame 22 is sealed, so that the positioning frame 22 can perform air suction and adsorption fixation work on the tubular workpiece through the micro air pump 21.

[0035] The chassis 11 is equipped with an auxiliary component for applying lubricant to the inner wall of the stamping plate 19 and the tubular workpiece. The auxiliary component includes a first cavity 2, in which a limiting tube 213 is fixedly connected. One end of the limiting tube 213 is slidably connected to an arc-shaped block 212. A groove 214 is provided on one side of the arc-shaped block 212. The arc-shaped block 212 moves upward by cooperating with the groove 214 and the limiting tube 213. A trigger is provided on one side of the micro air pump 21. The trigger drives the arc-shaped block 212 to move upward, thereby limiting the tubular workpiece.

[0036] Specifically, in the existing process of using stamping dies for flange nut processing, the tubular workpiece is first pushed into the die slot, then the turntable is rotated to load the next tubular workpiece, while the previous tubular workpiece is transferred to the area below the stamping plate 19. The flange nut is formed by pressing down on the stamping plate 19. However, after the tubular workpiece is loaded into the die slot, it is only limited by the baffles on the edge of the turntable, and a gap is intentionally left between the baffles and the tubular workpiece for easy unloading. This makes it very easy for the tubular workpiece to puncture between the baffles during the transfer process. Displacement occurs when the other half of the mold pushes and limits the tubular workpiece. The workpiece tilts between the two mold slots and leans against them. Even if it appears to be aligned within the tubular slot later, this tilted state has caused upward displacement of the workpiece. During subsequent stamping, the workpiece will experience uneven stress, leading to dimensional deviations in the flange nuts after forming, affecting the product's accuracy and quality. Furthermore, it may cause the workpiece to crack, deform, or be damaged, resulting in waste of raw materials, reduced production efficiency, and increased production costs.

[0037] Therefore, the present invention solves the above problems by setting the above structure. First, the operator pushes the tubular workpiece in the feeding plate 13 to the limiting groove 15. During the process of pushing the limiting groove 15, the rubber soft plate 24 is tightly attached to the circumferential surface of the tubular workpiece to form a seal. After sealing, the micro air pump 21 on one side of the positioning frame 22 pumps air, thereby creating a negative pressure inside the positioning frame 22. The workpiece is firmly fixed by the principle of negative pressure adsorption, avoiding displacement during stamping. During the movement of the positioning frame 22, the micro air pump 21 drives the trigger element. The trigger element is driven, causing the arc block 212 to move upward synchronously. After the arc block 212 moves upward, it works with the positioning frame 22 to limit and correct the tubular workpiece. This solves the problem of ineffective fixing of tubular workpieces in the prior art.

[0038] like Figure 7 As shown, in this embodiment, the limiting tube 213 has a connecting groove 223 inside, the end of the limiting tube 213 has a slot 215, the bottom end of the sliding groove 214 is fixed with a cone block 216, one side of the cone block 216 has a positioning hole 217, the surface of the arc block 212 has a spray hole 218, and the positioning hole 217 communicates with the spray hole 218.

[0039] Specifically, when the sliding groove 214 on one side of the arc block 212 abuts against the limiting tube 213, the cone 216 on the bottom wall of the sliding groove 214 is inserted into the slot 215 of the limiting tube 213. After being inserted into the slot 215, the cone 216 abuts against the pressure sensor on the top wall of the slot 215. At this time, the connecting groove 223 is aligned with the positioning hole 217. Then, the pressure pump inside the chassis 11 pressurizes and sprays out the lubricant stored inside. The lubricant flows along the connecting groove 223 to the positioning hole 217, and then passes through the spray hole 218 on the surface of the arc block 212 and is sprayed onto the inner wall of the arc block 212.

[0040] Additionally, when the trigger drives the arc block 212 to move upward along the limiting tube 213, since the cross-section of the arc block 212 is semi-circular and has the same inner diameter as the tubular workpiece, after the arc block 212 moves upward, it performs limiting and correction work on the tubular workpiece with the arc-shaped positioning frame 22. After completion, the arc block 212 moves downward, the positioning frame 22 continues to adsorb the tubular workpiece, and at the same time, the rotating disk 12 drives the tubular workpiece to be transferred to the bottom of the stamping plate 19 for stamping work.

[0041] Multiple synergies enhance the precision and efficiency of stamping. First, the positioning structure of the arc-shaped block 212 slide groove 214 and the conical block 216-slot 215 of the limiting tube 213 utilizes a pressure sensor to precisely trigger the lubricant injection process. This ensures that the lubricant is only sprayed out through the directional channel of the connecting groove 223 and the positioning hole 217 when the arc-shaped block 212 is fully in place, avoiding waste while ensuring uniform coverage of the inner wall of the workpiece. This effectively reduces the stamping friction coefficient, extends the mold life, and improves the surface quality of the product. Second, the connection between the semi-circular arc-shaped block 212 and the positioning frame 22... The dynamic limit correction function automatically corrects the workpiece position deviation by making close contact with the inner wall of the workpiece during the upward movement. Combined with the continuous negative pressure adsorption of the positioning frame 22, it forms a double fixation guarantee, eliminating the risk of displacement during the stamping process. It is especially suitable for the forming and processing of high-precision flange nuts. Finally, the mechanical linkage design of the lubrication and correction process ensures that the workpiece remains stable and fixed after the arc block 212 moves down, realizing a seamless connection of "correction-lubrication-stamping", significantly shortening the production cycle, improving the ability of automated continuous operation, and combining technical reliability and economic advantages.

[0042] Example 2: Figures 1 to 7As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the trigger includes a first rack plate 27 fixedly connected to one end of a micro air pump 21, a gear 28 rotatably connected to the inner wall of the first groove 222, the first rack plate 27 meshing with the gear 28, a second rack plate 29 meshing below the gear 28, a connecting plate 210 fixedly connected to the lower surface of the second rack plate 29, the connecting plate 210 rotatably disposed in the first cavity 2, and an inclined plate 211 fixedly connected to one end of the connecting plate 210, the inclined plate 211 being used to lift the arc-shaped block 212.

[0043] Specifically, when the tubular workpiece is pushed into the limiting groove 15, the tubular workpiece squeezes the positioning frame 22 into the first groove 222. During the retraction of the positioning frame 22, it pushes the micro air pump 21. The micro air pump 21 drives the first rack plate 27 to slide. The sliding of the first rack plate 27 drives the gear 28 meshing with it to rotate. The rotation of the gear 28 drives the second rack plate 29 to slide in the opposite direction to the sliding direction of the first rack plate 27. The sliding of the second rack plate 29 drives the connecting plate 210 to slide in the first groove 222. The sliding of the connecting plate 210 drives the inclined plate 211 to slide in the direction of the arc block 212, thereby driving the arc block 212 to move upward to perform the limiting and correction work while simultaneously performing the lubricant spraying work on the tubular workpiece.

[0044] When the tubular workpiece is pushed in, the positioning frame 22 is automatically triggered to retract. Through the reverse transmission mechanism of the rack and pinion 28, the second rack plate 29 drives the connecting plate 210 and the inclined plate 211 to move in tandem. Only a single workpiece placement action is needed to simultaneously complete the limit correction of the arc block 212 and the preparation for lubricant spraying. This "one-touch multi-action" mechanical transmission does not require additional drive components and manual operation steps, which improves the tightness of process connection. While reducing costs, it significantly improves the production cycle and processing stability, and is especially suitable for high-efficiency operation scenarios of automated production lines.

[0045] like Figure 4 As shown, in this embodiment, a sealing element is provided at the position of the chassis 11 corresponding to the arc-shaped block 212. The sealing element includes a rotating shaft 219 fixed inside the chassis 11. A torsion spring 220 is sleeved on the circumferential surface of the rotating shaft 219. Rotating arc plates 221 are fixed at both ends of the torsion spring 220. The diameter of the rotating arc plate 221 is smaller than the inner diameter of the tubular workpiece.

[0046] Specifically, the rotating arc plate 221, under the action of the torsion spring 220, maintains an outward opening trend. When the arc block 212 moves upward for limit correction, the rotating arc plate 221 automatically retracts under the pressure of the inner wall of the tubular workpiece. Its diameter, slightly smaller than the inner circle of the workpiece, ensures a tight fit against the inner wall, forming a temporary sealed cavity. This prevents lubricant from overflowing and contaminating the mold and workpiece surface during spraying, while concentrating the lubricant on key areas of the inner wall, improving lubrication. After processing, the torsion spring 220 drives the rotating arc plate 221 to automatically reset, preparing for the next sealing operation. This design combines reliability and reusability, significantly reducing cleaning and maintenance costs.

[0047] Working principle: First, the operator pushes the tubular workpiece in the feeding plate 13 to the limiting groove 15. During the process of pushing the limiting groove 15, the rubber soft plate 24 is tightly attached to the circumferential surface of the tubular workpiece to form a seal. After sealing, the micro air pump 21 on one side of the positioning frame 22 pumps air, thereby creating a negative pressure inside the positioning frame 22. The workpiece is firmly fixed by the negative pressure adsorption principle to prevent displacement during stamping. During the movement of the positioning frame 22, the micro air pump 21 drives the trigger element. The trigger element is driven, causing the arc block 212 to move upward synchronously. After the arc block 212 moves upward, it works with the positioning frame 22 to limit and correct the tubular workpiece.

[0048] Specifically, when the sliding groove 214 on one side of the arc block 212 abuts against the limiting tube 213, the cone 216 on the bottom wall of the sliding groove 214 is inserted into the slot 215 of the limiting tube 213. After being inserted into the slot 215, the cone 216 abuts against the pressure sensor on the top wall of the slot 215. At this time, the connecting groove 223 is aligned with the positioning hole 217. Then, the pressure pump inside the chassis 11 pressurizes and sprays out the lubricant stored inside. The lubricant flows along the connecting groove 223 to the positioning hole 217, and then passes through the spray hole 218 on the surface of the arc block 212 and is sprayed onto the inner wall of the arc block 212.

[0049] Additionally, when the trigger drives the arc block 212 to move upward along the limiting tube 213, since the cross-section of the arc block 212 is semi-circular and has the same inner diameter as the tubular workpiece, after the arc block 212 moves upward, it performs limiting and correction work on the tubular workpiece with the arc-shaped positioning frame 22. After completion, the arc block 212 moves downward, the positioning frame 22 continues to adsorb the tubular workpiece, and at the same time, the rotating disk 12 drives the tubular workpiece to be transferred to the bottom of the stamping plate 19 for stamping work.

[0050] Multiple synergies enhance the precision and efficiency of stamping. First, the positioning structure of the arc-shaped block 212 slide groove 214 and the conical block 216-slot 215 of the limiting tube 213 utilizes a pressure sensor to precisely trigger the lubricant injection process. This ensures that the lubricant is only sprayed out through the directional channel of the connecting groove 223 and the positioning hole 217 when the arc-shaped block 212 is fully in place, avoiding waste while ensuring uniform coverage of the inner wall of the workpiece. This effectively reduces the stamping friction coefficient, extends the mold life, and improves the surface quality of the product. Second, the connection between the semi-circular arc-shaped block 212 and the positioning frame 22... The dynamic limit correction function automatically corrects the workpiece position deviation by making close contact with the inner wall of the workpiece during the upward movement. Combined with the continuous negative pressure adsorption of the positioning frame 22, it forms a double fixation guarantee, eliminating the risk of displacement during the stamping process. It is especially suitable for the forming and processing of high-precision flange nuts. Finally, the mechanical linkage design of the lubrication and correction process ensures that the workpiece remains stable and fixed after the arc block 212 moves down, realizing a seamless connection of "correction-lubrication-stamping", significantly shortening the production cycle, improving the ability of automated continuous operation, and combining technical reliability and economic advantages.

[0051] Additionally, when the tubular workpiece is pushed into the limiting groove 15, the tubular workpiece squeezes the positioning frame 22 into the first groove 222. During the retraction of the positioning frame 22, it pushes the micro air pump 21, which drives the first rack plate 27 to slide. The sliding of the first rack plate 27 drives the gear 28 meshing with it to rotate. The rotation of the gear 28 drives the second rack plate 29 to slide in the opposite direction to the sliding direction of the first rack plate 27. The sliding of the second rack plate 29 drives the connecting plate 210 to slide in the first groove 222. The sliding of the connecting plate 210 drives the inclined plate 211 to slide in the direction of the arc block 212, thereby driving the arc block 212 to move upward to perform the limiting and correction work while simultaneously spraying lubricant on the tubular workpiece. Spraying lubricant can reduce the friction between the mold and the material, reduce frictional heat generation, thereby protecting the material properties and improving the stamping quality.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping die for processing flange nuts, comprising a machine body (1), a base plate (11) fixedly connected to the upper surface of the machine body (1), a rotating disk (12) rotatably connected to the upper surface of the base plate (11), a plurality of limiting grooves (15) being formed on the circumferential surface of the rotating disk (12), a support platform (16) fixedly connected to one side of the machine body (1), a first hydraulic cylinder (17) fixedly connected to the upper surface of the support platform (16), an auxiliary die (18) fixedly connected to the output end of the first hydraulic cylinder (17), a stamping plate (19) provided on the top wall of the machine body (1), a blanking plate (13) fixedly connected to one side of the machine body (1), an inclined blanking groove (14) being formed inside the blanking plate (13), and an arc groove (110) being formed on one side of the machine body (1), the arc groove (110) being used to drop the stamped flange nut, characterized in that: The rotating disk (12) is provided with several fixing components inside. The fixing components include a first groove (222) opened inside the rotating disk (12), a micro air pump (21) is elastically connected inside the first groove (222), a positioning frame (22) is fixedly connected to one end of the micro air pump (21), a positioning tube (23) is fixedly connected inside the positioning frame (22), and the positioning frame (22) can fit against the circumferential surface of the tubular workpiece. The chassis (11) is provided with an auxiliary component inside, which is used to provide auxiliary lubrication for the stamping plate (19) and the inner wall of the tubular workpiece; The auxiliary component includes a first cavity (2), in which a limiting tube (213) is fixedly connected. One end of the limiting tube (213) is slidably connected to an arc-shaped block (212). A groove (214) is provided on one side of the arc-shaped block (212). The arc-shaped block (212) moves upward by the cooperation of the groove (214) and the limiting tube (213). A trigger is provided on one side of the micro air pump (21). The trigger drives the arc-shaped block (212) to move upward, thereby limiting the tubular workpiece. The limiting tube (213) has a connecting groove (223) inside, and a slot (215) is provided at the end of the limiting tube (213). A cone block (216) is fixed to the bottom end of the sliding groove (214). A positioning hole (217) is provided on one side of the cone block (216). A spray hole is provided on the surface of the arc block (212). The positioning hole (217) is connected to the spray hole (218). The trigger drives the arc block (212) to move upward along the limiting tube (213). The cross section of the arc block (212) is semi-circular and has the same diameter as the inner circle of the tubular workpiece. After the arc block (212) moves upward, it performs limiting and correction work on the tubular workpiece with the arc-shaped positioning frame (22). After completion, the arc block (212) moves downward, and the positioning frame (22) continues to adsorb the tubular workpiece. At the same time, the rotating disk (12) drives the tubular workpiece to be transferred to the bottom of the stamping plate (19) for stamping.

2. The stamping die for processing flange nuts according to claim 1, characterized in that: The fixing assembly also includes a multi-section telescopic tube (25) fixed to the inner wall of the first groove (222), and a spring (26) is sleeved on the circumferential surface of the multi-section telescopic tube (25), and one end of the spring (26) is fixed to the micro air pump (21).

3. The stamping die for processing flange nuts according to claim 1, characterized in that: One end of the positioning frame (22) is fixed with a rubber soft plate (24). The rubber soft plate (24) is the skirt of the positioning frame (22). After it is attached to the tubular workpiece, the edge of the positioning frame (22) is sealed so that the positioning frame (22) can perform air suction and adsorption fixation work on the tubular workpiece by a micro air pump (21).

4. The stamping die for processing flange nuts according to claim 1, characterized in that: When the groove (214) on one side of the arc block (212) comes into contact with the limiting tube (213), the cone (216) on the bottom wall of the groove (214) is inserted into the slot (215) of the limiting tube (213). After being inserted into the slot (215), the cone (216) comes into contact with the pressure sensor on the top wall of the slot (215). At this time, the connecting groove (223) is aligned with the positioning hole (217). Then the pressure pump inside the chassis (11) pressurizes and sprays out the lubricant stored inside. The lubricant flows along the connecting groove (223) to the positioning hole (217), and then passes through the spray hole (218) on the surface of the arc block (212) and is sprayed onto the inner wall of the arc block (212).

5. A stamping die for processing flange nuts according to claim 1, characterized in that: The triggering element includes a first rack plate (27) fixedly connected to one end of a micro air pump (21), a gear (28) rotatably connected to the inner wall of the first groove (222), the first rack plate (27) meshing with the gear (28), a second rack plate (29) meshing below the gear (28), a connecting plate (210) fixedly connected to the lower surface of the second rack plate (29), the connecting plate (210) rotatably disposed in the first cavity (2), and an inclined plate (211) fixedly connected to one end of the connecting plate (210), the inclined plate (211) being used to lift the arc-shaped block (212).

6. A stamping die for processing flange nuts according to claim 5, characterized in that: When the tubular workpiece is pushed into the limiting groove (15), the tubular workpiece squeezes the positioning frame (22) into the first groove (222). During the retraction of the positioning frame (22), the micro air pump (21) is pushed. The micro air pump (21) drives the first rack plate (27) to slide. The sliding of the first rack plate (27) drives the gear (28) meshing with it to rotate. The rotation of the gear (28) drives the second rack plate (29) to slide in the opposite direction to the sliding direction of the first rack plate (27). The sliding of the second rack plate (29) drives the connecting plate (210) to slide in the first groove (222). The sliding of the connecting plate (210) drives the inclined plate (211) to slide in the direction of the arc block (212), thereby driving the arc block (212) to move upward to perform the limiting correction work while performing the lubricant spraying work on the tubular workpiece.

7. A stamping die for processing flange nuts according to claim 1, characterized in that: The chassis (11) is provided with a sealing element at the position corresponding to the arc block (212). The sealing element includes a rotating shaft (219) fixed inside the chassis (11). A torsion spring (220) is sleeved on the circumferential surface of the rotating shaft (219). Rotating arc plates (221) are fixed at both ends of the torsion spring (220). The diameter of the rotating arc plate (221) is smaller than the inner diameter of the tubular workpiece.

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