Adjustable stamping platform for automobile parts machining punch

Abstract

The application discloses an adjustable stamping table for automobile part machining punch presses, and relates to the technical field of metal part machining, and aims to solve the technical problem that iron particles produced by electrochemical corrosion of the existing stamping table can scratch aluminum plates in batches and form point-shaped appearance scrapped parts. The first three-layer composite gasket of the application insulates cast iron electrochemical corrosion, and eradicates aluminum plate point-shaped appearance scrapped parts; the second four-around connecting mechanism side limiting buffer eliminates stamping shaking and deviation caused by the elasticity of the gasket; the third spacing stability mechanism rigidly locks the vertical spacing during stamping, avoids uneven gasket deformation caused by partial load, and guarantees the uniformity of workpiece size; the fourth bottom stable support top plate multi-point lifting gasket suppresses long-term stamping edge warping and layering, greatly prolongs the service life of the gasket, and the four passive mechanical structures are matched with each other, and the appearance quality of the workpiece, the stamping stability, the forming precision and the durability of the consumables are simultaneously improved.

Description

Technical Field

[0001] This invention relates to the field of metal parts processing technology, and more specifically, to an adjustable stamping table for a stamping press used in the processing of automotive parts. Background Technology

[0002] With the rapid development of lightweight technology in new energy vehicles, the 6-series aluminum alloy battery tray has become a core load-bearing structural component of power battery packs due to its advantages such as lightweight, high heat dissipation, and ease of forming. Its multi-curved surface deep drawing forming process relies on an adjustable stamping table of a punch press to complete batch stamping processing. The aluminum alloy battery tray has stringent requirements for surface quality. Dot-like indentations and minor scratches on the workpiece surface can directly lead to failure in subsequent sealing and painting processes, resulting in the scrapping of a large number of vehicle parts, making production control very difficult.

[0003] Currently, adjustable stamping tables used for stamping aluminum alloy battery trays generally use cast iron as the bearing surface. During the stamping process, a chloride-containing emulsion is continuously sprayed to cool and lubricate the sheet metal. Under these conditions, there is a persistent galvanic corrosion defect: the cast iron substrate, the aluminum alloy workpiece, and the chloride-containing emulsion are in contact, forming a complete galvanic circuit. The cast iron electrode potential is lower, leading to continuous electrochemical micro-pitting corrosion, and micron-sized loose iron corrosion particles are constantly generated on the table surface. When the stamping slide reciprocates at high frequency, the table surface generates micron-level vibrations, causing iron particles to float and accumulate between the die and the aluminum plate. After being crushed by the die, these particles form dense dot-like indentations on the surface of the aluminum alloy battery tray, resulting in a high rate of rework due to appearance defects, significantly increasing the production cost and delivery cycle of parts.

[0004] Current conventional improvement methods rely solely on manual periodic cleaning of the work surface and spraying of temporary anti-rust coatings. These methods cannot physically isolate the cast iron from the aluminum alloy workpieces and the emulsion, and can only temporarily alleviate the corrosion and dust generation problem. They cannot eliminate the conditions for electrochemical corrosion reactions. The anti-rust coating is easily peeled off by stamping impacts and long-term rinsing with emulsions. Corrosion iron powder will quickly regenerate in the damaged areas, making this a temporary solution that only addresses the symptoms and not the root cause.

[0005] In summary, the cast iron table surface of existing adjustable stamping tables on punch presses is unsuitable for the precision stamping conditions of new energy aluminum alloy battery trays. The continuous electrochemical corrosion generates iron microparticles that scratch the aluminum plates in batches, resulting in spot-like defective parts, making it difficult to meet the high-volume, high-surface-quality production requirements of new energy battery trays. Therefore, we propose an adjustable stamping table for automotive parts processing punch presses. Summary of the Invention

[0006] The purpose of this invention is to provide an adjustable stamping table for processing automotive parts, so as to solve the technical problem that existing stamping tables produce iron microparticles from electrochemical corrosion, which can scratch aluminum plates in batches and form spot-like scrap parts.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an adjustable stamping table for processing automotive parts, comprising a cast iron base, a steel lower die plate, and a composite gasket; The cast iron base is fixed on the punch press table; the steel lower die base plate is located above the cast iron base to support the die; the composite gasket is located between the cast iron base and the steel lower die base plate to physically isolate the cast iron base and the steel lower die base plate. The composite gasket includes an isolation layer, a skeleton layer, and a buffer layer. The isolation layer, made of a corrosion-resistant insulating material, is located on the upper surface of the composite gasket and serves to contact and support the steel lower mold base plate. The skeleton layer, located between the isolation layer and the buffer layer, is made of a high-rigidity material and provides rigid support for the steel lower mold base plate. The buffer layer, made of an elastic material, is located on the lower surface of the composite gasket and serves to conform to the cast iron base and absorb vibration.

[0008] Preferably, the isolation layer is a modified perfluororubber layer, the skeleton layer is a bidirectional woven fiberglass mesh, and the buffer layer is a silicone rubber layer.

[0009] Preferably, it also includes multiple sets of connecting mechanisms, the connecting mechanisms including an extension plate, a side plate, and a socket; The extended plate is connected to the steel lower mold base plate; the side plate is located below the extended plate and fits the side of the composite gasket; the socket is connected to the bottom of the side plate and is inserted into the interior of the cast iron base.

[0010] Preferably, the composite gasket has an inner sleeve on its side, and the inner sleeve is fitted over the outside of the side plate.

[0011] Preferably, the connecting mechanism further includes a slider, which is disposed on one side of the socket. A groove is provided on the steel lower mold base plate, and the slider is slidably disposed in the groove. The sliding distance between the slider and the groove is used to provide a buffer stroke for the composite gasket.

[0012] Preferably, the connecting mechanism further includes a telescopic member connected between the extended plate and the side plate, and the telescopic member has a built-in spring for driving the extended plate to return to its original position.

[0013] Preferably, it also includes multiple sets of spacing stabilizing mechanisms, wherein the spacing stabilizing mechanism includes an extending vertical plate, an arc-shaped insert plate, a compression spring, and a pressure plate; The extended vertical plate is connected to the top of the side plate; the arc-shaped insert plate is slidably connected to the extended vertical plate, and a slanted protrusion is provided on one side of the arc-shaped insert plate; the compression spring is connected between the slanted protrusion and the extended vertical plate; the pressure plate is connected to the bottom of the extended flat plate and is used to squeeze the slanted protrusion when the extended flat plate moves down, so as to drive the arc-shaped insert plate to slide laterally.

[0014] Preferably, the side wall of the steel lower mold base plate is provided with an arc groove, which is used to accommodate the insertion of the arc plate when the arc plate is driven to slide laterally, so as to lock the vertical distance between the cast iron base and the steel lower mold base plate.

[0015] Preferably, the composite gasket has multiple recesses at its bottom, the cast iron base has a top plate at its top, and the top plate has protrusions corresponding to the recesses at its top. The socket has a hollow cavity, and a stabilizing mechanism is provided inside the hollow cavity. The stabilizing mechanism includes a slide bar and a lower extrusion plate. The slide bar is slidably disposed in the hollow cavity of the socket, and one end of the slide bar is provided with a pressure head; the lower extrusion plate is connected to the extension plate and is disposed above the pressure head, and is used to squeeze the pressure head when the extension plate moves down, so as to drive the slide bar to slide and push the top plate, so that the protrusion is embedded in the recess.

[0016] Preferably, the socket is arranged at an upward angle, and the stabilizing mechanism further includes an extension sleeve fixed to the socket. The slide bar is limited to slide between the extension sleeve and the socket to convert the vertical downward pressure of the lower extrusion plate into an upward thrust. The top edge of the steel lower mold base plate is provided with a liquid collection cavity, and the side wall of the steel lower mold base plate is connected to a drain outlet. The liquid collection cavity is used to collect and discharge emulsion and waste.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features a composite gasket with an integrated isolation layer, skeleton layer, and buffer layer, completely isolating the cast iron base from the steel lower mold plate. This blocks the galvanic cell reaction of "cast iron-electrolyte-aluminum parts." The surface layer, made of modified perfluororubber, is resistant to chloride ion corrosion and has a low coefficient of friction, preventing the precipitation of corrosive iron powder and avoiding drag scratches caused by stretching the aluminum plate. The middle bidirectional fiberglass mesh provides a rigid reference, while the bottom layer of silicone rubber absorbs micro-vibrations from stamping, reducing friction debris from the steel mold. Combined with the liquid collection cavity of the steel lower mold plate, waste liquid and steel chips are uniformly discharged, inhibiting the accumulation of iron particles that crush the workpiece. This significantly reduces the failure and rework rate of battery tray coating and sealing processes, solving the most critical pain point of appearance scrapping in existing equipment.

[0018] 2. The gasket of this invention is inherently elastic and prone to lateral movement, edge warping, and unilateral hollowing during stamping, leading to deviation of the stamping reference. This invention arranges multiple sets of connecting mechanisms around the platform. The side plate fits against the side of the gasket, and the inner sleeve of the gasket wraps around the side plate to achieve full-circumference lateral limitation. The socket is inserted into the cast iron base to lock the horizontal relative position of the three, preventing the gasket from deviating to the left or right. The slider and the slide groove have a standard buffer stroke. The telescopic component has a built-in spring to achieve automatic rebound and reset after stamping. The instantaneous vibration of stamping is absorbed by the spring and the silicone rubber of the gasket, avoiding the rigid transmission of impact to the bottom screw adjustment mechanism. The entire passive mechanical structure does not require electrical control and only relies on mechanical sliding and spring energy storage to complete the limitation and buffering, eliminating the hidden danger of stamping instability caused by the elastic gasket. At the same time, it reduces the impact and wear of vibration on the lifting and adjusting components. While ensuring the advantages of anti-corrosion isolation, it initially improves the stability of the stamping process.

[0019] 3. This invention is equipped with multiple sets of spacing stabilizing mechanisms. During the stamping process, the pressure plate squeezes the inclined convex head to push the arc insert plate laterally into the arc groove of the base plate. During the forming stage, the rigid interlocking locks the vertical distance between the cast iron base and the steel lower mold base plate, forcing all areas to have a completely uniform buffer distance of the shims, unaffected by local load differences. During standby and the initial pressing stage, flexible buffering is retained to absorb impact. During the critical forming stage, the forming reference is rigidly locked, taking into account both shock absorption and dimensional accuracy. The arc-shaped inclined interlocking structure has high alignment tolerance and is not easy to jam aluminum slag. Multiple compression springs are linked synchronously to ensure that the locking action around the four sides is synchronized, avoiding dimensional deviations caused by uneven deformation of the shims, and greatly improving the dimensional consistency of batch processing of aluminum alloy battery trays.

[0020] 4. This invention relies on a downward-pressing linkage stabilizing mechanism, using an inclined plane to convert vertical pressure into upward thrust. During stamping, the top plate protrusions embed into the bottom recess of the gasket, evenly supporting the entire bottom surface of the gasket from multiple points, eliminating the gap between the gasket and the base, avoiding edge curling and central bulging caused by repeated compression. Multi-point support disperses the alternating stress of the gasket, reducing the risk of fatigue cracking of the fiberglass skeleton and rubber layer. The inclined plane slide automatically removes slag and is less prone to jamming. After stamping, the top plate automatically falls back to release the buffer gap without sacrificing shock absorption performance. The inner and outer double-layer constraints work together to completely solve the problem of gasket edge warping and displacement failure under long-term mass production. The service life of the gasket is more than doubled compared to ordinary rubber gaskets, significantly reducing the frequency of gasket replacement.

[0021] 5. This invention integrates four layers of passive mechanical structures: composite anti-corrosion gaskets, lateral buffer connection mechanisms, forming rigid spacing mechanisms, and bottom full-area top support and stabilization mechanisms. The entire process is free of motors, sensors, and hydraulic / electrical components, making it suitable for harsh stamping conditions involving high oil contamination and chloride ion corrosion. It eliminates electrical short circuits and signal lag, preventing aluminum parts from being scrapped at the front end, stabilizing the stamping benchmark and standardizing forming dimensions in the middle, and providing long-term protection against easily damaged gaskets at the bottom. This addresses the four core defects of existing stamping tables: corrosion, wobbling, dimensional errors, and material waste. The modular design of the entire structure facilitates disassembly and maintenance, allowing for gasket replacement and internal mechanism repair without the need for complete mold hoisting, reducing downtime. Simultaneously, the buffer and shock absorption structure reduces alternating impact losses on the lead screw and mold, extending the service life of the stamping table adjustment mechanism and mold. This balances product yield, equipment durability, and ease of on-site maintenance, reducing the overall production cost of the entire stamping process for new energy aluminum alloy battery trays. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the composite gasket structure in this invention; Figure 3 This is a schematic diagram of the arrangement of multiple connecting mechanisms in this invention; Figure 4 This is a schematic diagram of the steel lower mold base plate in this invention; Figure 5 This is a schematic diagram of the connection structure of a single connecting mechanism in the normal state in this invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point A in the middle; Figure 7 This is a cross-sectional schematic diagram of the present invention; Figure 8 For the present invention Figure 7 A structural diagram of the structure at point B in the middle; Figure 9 This is a schematic diagram of the connection structure of a single connecting mechanism in the pressed-down state in this invention; Figure 10 For the present invention Figure 9 A structural diagram of the structure at point C; Figure 11 This is a schematic diagram of the cooperation structure between the top plate and the stabilizing mechanism in this invention.

[0023] Explanation of the labels in the diagram: 1. Cast iron base; 2. Composite gasket; 201. Isolation layer; 202. Skeleton layer; 203. Buffer layer; 204. Inner sleeve; 3. Steel lower mold base plate; 31. Liquid collection cavity; 4. Connecting mechanism; 401. Extension plate; 402. Side plate; 403. Socket; 404. Slider; 405. Telescopic component; 5. Spacing stabilizing mechanism; 501. Extension vertical plate; 52. Arc insert plate; 521. Slanted protrusion; 522. Compression spring; 503. Pressure plate; 6. Top plate; 7. Extension column; 8. Stabilizing mechanism; 801. Extension sleeve; 802. Sliding bar; 803. Pressure head; 804. Lower extrusion plate. Detailed Implementation

[0024] like Figures 1 to 11 As shown, the present invention relates to an adjustable stamping table for a stamping press used in automotive parts processing, comprising a stamping table base, which includes, from bottom to top, a cast iron base 1, a composite gasket 2, and a steel lower die base plate 3. The cast iron base 1 is fixed to the stamping table surface. A lead screw and a displacement adjustment mechanism may also be provided at the bottom of the cast iron base 1, which is prior art and will not be described in detail here. The top of the steel lower die base plate 3 has a die cavity. The composite gasket 2 is composed of three layers of materials, including an isolation layer 201, a skeleton layer 202, and a buffer layer 203. The isolation layer 201 is the uppermost surface layer, and the material of the isolation layer 201 is modified. The perfluororubber layer is resistant to chloride ions in emulsions, isolates the cast iron from direct contact with the aluminum alloy, and blocks the electrochemical corrosion circuit. The material surface has low friction characteristics, and the aluminum alloy is not prone to dragging scratches when stretched. The skeleton layer 202 is located in the middle. The skeleton layer 202 is a bi-directional woven corrosion-resistant fiberglass mesh skeleton. As a tensile load-bearing layer, it can withstand high-frequency reciprocating extrusion during stamping and slight deformation of the table surface, preventing long-term fatigue tearing and local bulging of the pad. The buffer layer 203 is located at the bottom. The buffer layer 203 is made of high-damping silicone rubber, which fits the cast iron table surface, absorbs the instantaneous small vibrations during stamping, reduces the relative sliding amplitude between parts, and reduces the amount of friction debris generated.

[0025] Working principle: The composite gasket 2 completely covers the upper surface of the cast iron base 1, the bottom high-damping silicone rubber buffer layer 203 is tightly attached to the cast iron substrate, and the surface modified perfluororubber isolation layer 201 completely supports the steel lower mold base plate 3. The cast iron and steel mold are completely physically separated by the composite gasket 2, with no direct metal contact area. After spraying with a chloride-ion emulsion, the liquid only contacts the surface fluororubber layer and cannot simultaneously connect the cast iron and aluminum alloy workpieces, thus disrupting the conditions for the formation of the "cast iron-electrolyte-aluminum part" galvanic cell. Electrochemical micro-pitting will not occur, and the continuous precipitation of micron-level corrosion iron powder from the cast iron substrate will be inhibited. The intermediate bidirectional fiberglass mesh skeleton layer 202 is a continuous rigid load-bearing layer with no compression deformation under no-load conditions. The horizontal reference of the steel lower mold base plate 3 is entirely based on the fiberglass skeleton, and there will be no local depressions or tilting due to the flexibility of the gasket. The inner sleeve 204 of the composite gasket 2 wraps around the side to prevent leakage and slag accumulation in the corner gaps. The fluororubber surface of the isolation layer 201 is smooth and has low friction. The bottom of the steel lower mold base plate 3 is in contact with the rubber layer, and there is no metal friction between the two in static conditions, so steel wear debris will not be generated in advance.

[0026] The instantaneous impact of the stamping is transmitted downwards, with the pressure first acting on the isolation layer 201. The load is then evenly distributed to the middle fiberglass skeleton layer 202. The fiberglass mesh is highly rigid and incompressible, with no visible change in overall thickness. Only the bottom silicone rubber buffer layer 203 undergoes micron-level reversible compression, absorbing the stamping resonance and minor table shaking. This significantly reduces the relative sliding amplitude between the steel lower mold base plate 3 and the composite gasket 2, reducing metal debris generated by friction on the steel mold base plate. As the stamping slide is lifted, the formed workpiece is demolded, and the load acting on the composite gasket 2 is completely eliminated. The bottom silicone rubber buffer layer 203 rebounds 100% to its original thickness due to its own damping elasticity. The three-layer composite gasket 2 returns to its initial flat state. After rebounding, the composite gasket 2 still completely isolates the cast iron base 1, preventing corrosion during the next stamping cycle and achieving long-term protection for continuous production.

[0027] Furthermore, although the above achieves physical isolation and solves the problem of electrochemical corrosion, the composite gasket 2 has a certain degree of elasticity, which can easily lead to stamping instability. To address this, multiple sets of connecting mechanisms 4 are provided between the cast iron base 1 and the steel lower die base plate 3. The connecting mechanism 4 includes an extension plate 401, which is connected to the steel lower die base plate 3. A side plate 402 is provided below the extension plate 401, with one side of the side plate 402 fitting against the side edge of the composite gasket 2. A socket 403 is connected to the bottom of the side plate 402 near the cast iron base 1. The socket 403 is inserted into the interior of the cast iron base 1, and the socket 403 and the cast iron base 1 can be connected by a socket. The connection is made by means of a joint structure or locking method. A slider 404 is provided on one side of the socket 403. A groove is provided on the steel lower mold base plate 3 for the slider 404 to slide. The sliding distance between the slider 404 and the groove is used to provide a buffer distance for the composite gasket 2, which is used to buffer and absorb the instantaneous small vibrations during stamping. A telescopic member 405 is connected between the extension plate 401 and the side plate 402. The telescopic member 405 is composed of a telescopic cylinder and a telescopic rod that are interlocked. A spring is provided between the telescopic cylinder and the telescopic rod. The telescopic member 405 is used to reset the steel lower mold base plate 3. In order to enhance the stability of the composite gasket 2, an inner sleeve 204 is provided on the side of the composite gasket 2 and fitted onto the side plate 402.

[0028] Working principle: The internal spring of the telescopic component 405 maintains the extended state, and the slider 404 stays at the uppermost position of the slide groove, leaving a standard buffer sliding stroke; the side plate 402 fits against the side of the composite gasket 2, and the inner sleeve 204 of the gasket is tightly fitted on the outside of the side plate 402, restricting the composite gasket 2 from moving left and right or warping at the edges; the socket 403 is inserted into the inside of the cast iron base 1, locking the steel lower mold base plate 3, the composite gasket 2, and the cast iron base 1 into one in the horizontal direction. There is no lateral relative displacement among the three, and the gasket will not deviate or have local hollowness, thus avoiding the problem of unilateral deformation under force in advance.

[0029] As the extended plate 401 moves downward, it pulls the telescopic component 405 to compress, causing the internal spring to contract under pressure. Simultaneously, the slider 404 slides downward along the groove of the steel lower mold base plate 3. The travel range between the groove and the slider 404 is the buffering distance of the composite gasket 2. The bottom buffer layer 203 of the composite gasket 2 undergoes micron-level compression simultaneously. The two work together to absorb the instantaneous high-frequency vibration of the stamping, preventing the impact from being directly and rigidly transmitted to the cast iron base 1. During the downward movement, the side plate 402 always adheres to the side of the gasket, and the inner sleeve 204 of the gasket slides synchronously along the outer wall of the side plate 402, restraining the side of the composite gasket 2 throughout the entire process and preventing the gasket from being compressed. The sides bulge and partially tear; the socket 403 is always inserted into the cast iron base 1, and there will be no unilateral tilting or offset; the forming load is completely eliminated, the compression spring inside the telescopic component 405 releases the rebound thrust, pushes the extension plate 401 to reset upward, and drives the steel lower mold base plate 3 to rise synchronously; the slider 404 slides upward along the slide groove back to the initial position, and the bottom silicone rubber of the composite gasket 2 rebounds synchronously to restore the original thickness; the side plate 402 and the inner sleeve of the gasket 204 return to the initial height synchronously, and the three of them return to a stable fit state, completing a single stamping buffer cycle, and preparing for the limit buffer for the next stamping.

[0030] Furthermore, although the above achieves the limiting effect, the stability is still relatively weak. The difference in force during stamping causes different elastic deformations of the composite gasket 2, which affects the quality of the workpiece forming. Therefore, multiple sets of spacing stabilizing mechanisms 5 are designed during stamping. The spacing stabilizing mechanism 5 includes an extended vertical plate 501 connected to the top of the side plate 402. An arc-shaped insert plate 52 is slidably connected to the extended vertical plate 501. The arc-shaped insert plate 52 is generally in the shape of an arc fan. An inclined protrusion 521 is integrally formed on one side of the arc-shaped insert plate 52. Multiple compression springs 5 ​​are connected between the inclined protrusion 521 and the extended vertical plate 501. 22. An arc groove is provided on the side wall of the steel lower mold base plate 3 near the arc insert plate 52. The bottom of the extension plate 401 is connected to the pressure plate 503. When the extension plate 401 is pressed down, it drives the pressure plate 503 to move down, which can squeeze the inclined protrusion 521. At the same time, when the inclined protrusion 521 contacts the pressure plate 503, the arc groove of the steel lower mold base plate 3 moves down to the corresponding position of the arc insert plate 52. If the arc insert plate 52 is squeezed further, it will enter the arc groove, which can constrain the distance between the cast iron base 1 and the steel lower mold base plate 3. Therefore, the elastic buffer distance of the composite gasket 2 remains consistent.

[0031] Working principle: When there is no stamping load, the extension plate 401 is in the initial lifting position, and the pressure plate 503 and the inclined protrusion 521 of the arc insert plate 52 are separated from each other; the compression spring 522 continuously pushes the arc insert plate 52 outward, so that the arc insert plate 52 is away from the arc groove on the side wall of the steel lower die base plate 3, and the two are not locked together; at this time, the entire connecting mechanism 4 only relies on the slider groove to provide flexible buffer stroke, and the composite gasket 2 can freely complete the micron-level shock absorption deformation, and the mechanism is in the locking state.

[0032] During stamping, the steel lower die base plate 3 sinks slightly downwards, causing the extension plate 401 to move downwards synchronously. The pressure plate 503 presses down accordingly, vertically pressing the inclined surface of the slanted protrusion 521. The inclined surface generates a lateral force, pushing the arc insert plate 52 to slide laterally along the extension vertical plate 501, compressing multiple sets of compression springs 522. As the steel lower die base plate 3 continues to move downwards, the side wall arc groove precisely aligns with the end of the arc insert plate 52. The pressure plate 503 continues to press down, and the arc insert plate 52 is completely inserted into the arc groove. The arc insert plate 52 and the arc groove... A rigid interlocking structure is formed, directly locking the vertical distance between the cast iron base 1 and the steel lower die base plate 3. At this time, the steel lower die base plate 3 is no longer allowed to sink further in the vertical direction. The compression amount of the composite gasket 2 in all areas is uniformly limited. Regardless of the size of the local stamping load or the strength of the off-center load, the buffer deformation distance of the composite gasket 2 is completely equal. There will be no differential deformation of local over-compression or local under-compression, avoiding the deviation of workpiece surface and depth dimensions caused by uneven deformation of the composite gasket 2.

[0033] When the forming load disappears, the extended plate 401 returns to its original position upward with the spring of the telescopic component 405, and the pressure plate 503 moves upward synchronously, releasing the pressure on the inclined protrusion 521; the compressed spring 522 releases its elastic force and pushes the arc insert plate 52 laterally out of the arc groove, the rigid spacing constraint is released, and the composite gasket 2, slider 404 and slide groove return to a free buffer state, waiting for the next stamping cycle; during standby and the initial pressing stage, the composite gasket 2 and the spring of the connecting mechanism 4 are used to achieve buffering and shock absorption, absorbing impact and protecting the equipment; in the critical stage of stamping, the spacing is rigidly locked to stabilize the forming reference, taking into account both shock absorption and high-precision forming requirements, without sacrificing the buffering function for dimensional accuracy.

[0034] Furthermore, although the above improves the buffering stability of the composite gasket 2, under long-term working stamping, the composite gasket 2 may experience edge warping or displacement. In order to extend the stability and life of the composite gasket 2, the bottom of the composite gasket 2 is provided with multiple recesses, the top of the cast iron base 1 is provided with a top plate 6, the top of the top plate 6 is integrally formed with protrusions, the protrusions correspond to the positions of the recesses, and the bottom of the top plate 6 is connected with multiple extension columns 7. In this embodiment, the socket 403 is arranged in an upward inclined insertion arrangement, and the socket 403 has a hollow cavity. The cavity of the socket 403 is provided with a stabilizing mechanism 8. The stabilizing mechanism 8 includes an extension sleeve 801 fixed to the socket 403. A slide bar 802 is limited to slide between the extension sleeve 801 and the socket 403. The end of the slide bar 802 away from the cast iron base 1 is integrally formed with a pressure head 803. A lower extrusion plate 804 connected to the extension plate 401 is provided above the pressure head 803.

[0035] Working principle: When the punch press slide is not pressed down, the extension plate 401 is in a high position, the lower extrusion plate 804 and the pressure head 803 are separated from each other, the slide bar 802 has no lateral thrust and is in a low position inside the socket 403; the top plate 6 only lightly touches the bottom of the composite gasket 2, the protrusion is not completely inserted into the gasket recess, and the two retain a small gap. The composite gasket 2 can rely on its own silicone rubber layer to complete the basic micro-vibration reduction without rigid tightening; the socket 403 is an upwardly inclined hollow structure, the slide bar 802 has a reserved sliding stroke along the inclined slide of the extension sleeve 801, and the entire stabilizing mechanism 8 is in a ready-to-support state.

[0036] The steel lower mold base plate 3 sinks downward, causing the extension plate 401 to move downward synchronously. The lower extrusion plate 804, fixed to the bottom of the plate, presses down vertically, continuously squeezing the pressure head 803 at the top of the slide bar 802. The pressure head 803, subjected to vertical pressure, slides obliquely upward along the inclined slide of the extension sleeve 801 (the inclined structure of the socket 403 converts the vertical downward pressure into an oblique upward thrust, providing a force-increasing effect). The slide bar 802 moves obliquely upward, and its top directly presses against the extension column 7 at the bottom of the top plate 6, simultaneously lifting the entire top plate 6 upward. The integrally formed protrusions on the top of the top plate 6 are simultaneously embedded into the corresponding concave bottom of the composite gasket 2. The recessed opening, with multiple interlocking and locking points, provides uniform support to the bottom of the composite gasket 2, ensuring that the composite gasket 2 is completely and securely pressed between the steel lower mold base plate 3 and the cast iron base 1. This prevents hollow areas, upward warping of edges and corners, and localized lateral displacement at the bottom of the composite gasket 2. Simultaneously, the interlocking of the concave and convex points restricts independent sliding in different areas at the bottom of the composite gasket 2, preventing localized stretching and delamination damage during prolonged and repeated stamping. This stage works synchronously with the spacing stabilization mechanism 5: the outer arc insert plate 52 locks the total vertical height, and the interlocking of the concave and convex points locks the body of the composite gasket 2, providing double constraints from both inside and outside, ensuring uniform compression deformation height throughout the composite gasket 2.

[0037] With the stamping load completely gone, the spring of the telescopic component 405 pushes the extension plate 401 to return to its original position, and the lower extrusion plate 804 rises synchronously, releasing the pressure on the pressure head 803; the slide bar 802, without the constraint of the top thrust, falls back along the inclined slide by its own weight, the top plate 6 loses the upward supporting force, the protrusion automatically disengages from the gasket recess, restoring the small gap, and the composite gasket 2 regains a small amount of buffer space, waiting for the next stamping cycle.

[0038] The top plate 6 is covered with uniformly distributed protrusions, each corresponding to a recessed area at the bottom of the composite gasket 2. During the stamping process, multiple points simultaneously push the composite gasket 2 upwards, completely eliminating the gap between the composite gasket 2 and the cast iron base 1 from the bottom. This prevents the edges of the composite gasket 2 from curling upwards and the middle from bulging under stamping vibration and repeated compression, thus solving the core hidden danger of gasket misalignment and deformation failure during long-term continuous production. The socket 403 is arranged at an angle, and the vertical downward stamping pressure is converted into an upward thrust through the inclined surface of the slide bar 802, eliminating the need for additional springs, cylinders, etc. The auxiliary power system provides sufficient clamping force by relying solely on the weight of the mold, ensuring that the protrusions are fully engaged in the recesses. The passive mechanical structure is suitable for harsh stamping environments with oil stains and emulsions. Traditional gaskets only have perimeter support and no bottom support. With repeated bending and suspension in the middle during long-term stamping, they are prone to fiberglass skeleton breakage and rubber delamination. This mechanism provides multi-point uniform support to the entire bottom surface of the composite gasket 2, dispersing the alternating stress at the bottom, reducing local bending fatigue of the gasket, delaying the delamination and cracking of the isolation layer 201, skeleton layer 202, and buffer layer 203, and extending the service life of the gasket.

[0039] To prevent emulsion from accumulating, a liquid collection cavity 31 is provided at the top edge of the steel lower mold base plate 3. The side wall of the steel lower mold base plate 3 is connected to a drain port. The edge of the central area of ​​the steel lower mold base plate 3 is designed to be inclined, which facilitates the collection of emulsion overflow during stamping. When the emulsion is squeezed out, a small amount of steel friction debris can also be discharged. A small amount of steel friction debris flows into the liquid collection cavity 31 of the steel lower mold base plate 3 along the slope and is discharged uniformly from the drain port on the side wall. The debris will not accumulate on the surface of the pad and repeatedly roll the aluminum plate.

[0040] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. An adjustable stamping table for a stamping press used in automotive parts processing, characterized in that, include: Cast iron base (1), which is used to fix it on the punch press table; A steel lower mold base plate (3) is provided above the cast iron base (1) and is used to support the mold; A composite gasket (2) is disposed between the cast iron base (1) and the steel lower mold base plate (3) to physically isolate the cast iron base (1) and the steel lower mold base plate (3). The composite gasket (2) includes an isolation layer (201) made of corrosion-resistant insulating material, located on the upper surface of the composite gasket (2) for contacting and supporting the steel lower mold base plate (3). The lower surface of the composite gasket (2) is provided with a buffer layer (203) made of elastic material for fitting the cast iron base (1) and absorbing vibration. A skeleton layer (202) is provided between the isolation layer (201) and the buffer layer (203) for providing rigid support for the steel lower mold base plate (3). It also includes multiple sets of connecting mechanisms (4), the connecting mechanisms (4) including: An extension plate (401) is connected to the steel lower mold base plate (3); Side plate (402), which is located below the extended plate (401) and fits the side of the composite gasket (2); A socket (403) is attached to the bottom of the side plate (402) and inserted into the interior of the cast iron base (1).

2. The adjustable stamping table for automotive parts processing according to claim 1, characterized in that, The isolation layer (201) is a modified perfluororubber layer, the skeleton layer (202) is a bidirectional woven fiberglass mesh, and the buffer layer (203) is a silicone rubber layer.

3. The adjustable stamping table for automotive parts processing according to claim 1, characterized in that, The composite gasket (2) has an inner sleeve (204) on its side, and the inner sleeve (204) is fitted onto the outside of the side plate (402).

4. The adjustable stamping table for automotive parts processing according to claim 1, characterized in that, The connecting mechanism (4) further includes: A slider (404) is disposed on one side of the socket (403); The steel lower mold base plate (3) is provided with a sliding groove, and the slider (404) is slidably disposed in the sliding groove. The sliding distance between the slider (404) and the sliding groove is used to provide the buffer stroke of the composite gasket (2).

5. An adjustable stamping table for an automotive parts processing press according to claim 4, characterized in that, The connecting mechanism (4) further includes a telescopic member (405) which is connected between the extension plate (401) and the side plate (402). The telescopic member (405) has a built-in spring for driving the extension plate (401) to reset.

6. The adjustable stamping table for automotive parts processing according to claim 1, characterized in that, It also includes multiple sets of spacing stabilizing mechanisms (5), the spacing stabilizing mechanisms (5) including: An extension vertical plate (501) is connected to the top of the side plate (402); An arc-shaped insert plate (52) is slidably connected to the extended vertical plate (501), and a slanted protrusion (521) is provided on one side of the arc-shaped insert plate (52). A compression spring (522) is connected between the inclined protrusion (521) and the extended vertical plate (501); A pressure plate (503), which is connected to the bottom of the extension plate (401), is used to press the inclined protrusion (521) when the extension plate (401) moves down, so as to drive the arc plate (52) to slide laterally.

7. An adjustable stamping table for an automotive parts processing press according to claim 6, characterized in that, The side wall of the steel lower mold base plate (3) is provided with an arc groove. The arc groove is used to accommodate the insertion of the arc plate (52) when the arc plate (52) is driven to slide laterally, so as to lock the vertical distance between the cast iron base (1) and the steel lower mold base plate (3).

8. An adjustable stamping table for an automotive parts processing press according to claim 1, characterized in that, The composite gasket (2) has multiple recessed openings at its bottom, and the cast iron base (1) has a top plate (6) at its top, with protrusions corresponding to the recessed openings at the top of the top plate (6). The socket (403) has a hollow cavity, and a stabilizing mechanism (8) is provided inside the hollow cavity. The stabilizing mechanism (8) includes: A slide bar (802) is slidably disposed in the hollow cavity of the socket (403), and a pressure head (803) is provided at one end of the slide bar (802). The lower extrusion plate (804) is connected to the extension plate (401) and is located above the pressure head (803). It is used to squeeze the pressure head (803) when the extension plate (401) moves down, so as to drive the slide bar (802) to slide and push the top plate (6) so that the protrusion is embedded in the recess.

9. An adjustable stamping table for an automotive parts processing press according to claim 8, characterized in that, The socket (403) is arranged at an upward angle. The stabilizing mechanism (8) also includes an extension sleeve (801) fixed to the socket (403). The slide bar (802) is limited to slide between the extension sleeve (801) and the socket (403) to convert the vertical downward pressure of the lower extrusion plate (804) into an upward thrust.

10. An adjustable stamping table for an automotive parts processing press according to claim 9, characterized in that, The top edge of the steel lower mold base plate (3) is provided with a liquid collection cavity (31), and the side wall of the steel lower mold base plate (3) is connected to a drain outlet. The liquid collection cavity (31) is used to collect and discharge emulsion and waste.

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