A punching die for a hanger plate

Abstract

The application discloses a punching die for hanging plate and relates to the punching technology field of hanging plate production. The punching die comprises an upper die and a lower die. The upper die is composed of an upper die plate, an upper backing plate, a fixed plate and a stripping plate. The lower die comprises a lower die plate, a lower backing plate and a die holder. An elastic piece is arranged between the upper die and the lower die. The elastic piece comprises a stripping spring, an isometric screw, a speed reduction mechanism and a trigger mechanism. The speed reduction mechanism is arranged between the stripping plate and the fixed plate and is used for inhibiting the rebound speed of the stripping plate when the stripping plate is blocked. The trigger mechanism is arranged between the upper die and the lower die and is used for triggering the speed reduction mechanism to act when the stripping plate is blocked. The punching die for hanging plate can adaptively adjust the rebound speed of the stripping plate according to the blocking degree of the stripping plate through a hydraulic damping mechanism, and the stripping plate can be locked when the stripping plate is blocked to the limit, so that the risk of the hanging plate suddenly impacting the lower die is reduced, the operation safety is ensured, and the impact noise is reduced.

Description

Technical Field

[0001] This invention relates to the field of punching technology for panel production, and particularly to a punching die for panel production. Background Technology

[0002] In the punching process of plate-like parts, existing punching dies generally adopt a structure with an upper die and a lower die. The upper die usually has a punch and a matching stripping mechanism, while the lower die has a cutting edge corresponding to the punch for cutting. The stripping mechanism is generally implemented by an elastic element. After punching, the workpiece is pushed away from the punch by the restoring force of the elastic element, thereby realizing continuous punching operation.

[0003] However, in actual long-term use, the elastic components of the stripper plate in the above-mentioned structure, whether springs or urethane rubber, will experience varying degrees of fatigue attenuation due to repeated compression. Since multiple elastic components are usually evenly distributed along the punch position, the fatigue levels of each component are often inconsistent, leading to uneven force distribution on the stripper plate during elastic lifting and lowering, resulting in skewing or localized jamming. For thicker plates like the mounting plate, the number of punches is usually more than one, and the spacing between the holes is relatively large. This unevenness further exacerbates the frictional resistance between the stripper plate and the punch, making it difficult for the punch to smoothly detach from the mounting plate after punching, thus causing material jamming in the upper die or delayed stripping. During normal stripping, the reset speed of the stripper plate is constrained by the upward movement speed of the upper mold, allowing the hanging plate to detach smoothly. However, once jamming occurs, the compressive potential energy continuously accumulated by the elastic element will be suddenly released at a certain moment, pushing the stripper plate to bounce down violently. This causes the hanging plate to impact the lower mold with high kinetic energy, which not only generates a lot of noise but may also cause psychological stress or even personal injury to the operators. In actual production, the operators can only continuously add oil to the stripper plate to reduce friction, but the effect is not good, and the jamming problem still exists. The continuously added oil will cause oil to splash due to the punching operation.

[0004] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide a way to effectively control the release of potential energy of elastic elements when jamming occurs and reduce sudden impacts on the hanging plate is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a punching die for a hanging plate, which solves the technical problem that in the long-term use of the stripping mechanism of the existing hanging plate punching die, the elastic element is fatigued and the force is uneven, which leads to jamming or delayed stripping. After jamming, the potential energy accumulated in the elastic element is suddenly released, which causes the hanging plate to impact the lower die at high speed, generating noise and posing a safety hazard to the operator.

[0006] To achieve the above objectives, the present invention provides a punching die for a hanging plate, comprising an upper die and a lower die. The upper die is composed of an upper template, an upper pad, a fixing plate, and a stripper plate. The lower die comprises a lower template, a lower pad, and a die base. The invention is characterized in that an elastic element is provided between the fixing plate and the stripper plate of the upper die, and a triggering mechanism is also provided between the upper die and the lower die. The elastic components include a stripping spring, a height equalizing screw, and a speed reduction mechanism; the speed reduction mechanism is located between the stripping plate and the fixed plate and is used to suppress the rebound speed when the stripping plate jams. The triggering mechanism is used to activate the deceleration mechanism when a jam occurs.

[0007] Preferably, the deceleration mechanism includes a damping component and a control component. The damping component is installed between the fixed plate and the stripper plate, and the control component is used to adjust the damping force of the damping component.

[0008] Preferably, the damping component includes a damping cylinder, an oil reservoir, and a valve; the oil reservoir is fixed to the upper template, the damping cylinder is located below the oil reservoir and connected by a connecting pipe, and a valve is installed at the connecting pipe; The damping cylinder is equipped with a piston, and a rod is fixed to the bottom of the piston. The rod passes through the bottom of the damping cylinder and is fixedly connected to the stripper plate. The damping cylinder is filled with oil.

[0009] Preferably, the control components include a transverse wedge, a longitudinal wedge, a support spring, and a rotary drive unit; The fixed plate has an installation groove inside, the transverse wedge is slidably set in the installation groove, and the longitudinal wedge is fixed to the side of the stripper plate facing the fixed plate, and the inclined surface of the longitudinal wedge matches the inclined surface of the transverse wedge. A support spring is positioned between the transverse wedge and the baffle at the opening of the mounting slot to push the transverse wedge toward the mounting hole.

[0010] Preferably, the rotary drive unit includes a drive shaft, a limiting ring, a return spring, a sliding sleeve, a fixed sleeve, and a wedge assembly; the drive shaft is slidably inserted into the insertion hole at the bottom of the transverse wedge, and its two ends extend to both sides of the transverse wedge, respectively; One end of the drive shaft facing the baffle passes through the baffle, and the other end extends into the through hole between the mounting groove and the mounting hole; the fixed sleeve is fixed to the end face of the transverse wedge facing the mounting hole, the sliding sleeve is rotatably connected to the other end of the fixed sleeve and is axially limited, and a polygonal cross-section rotating rod is slidably inserted in the sliding sleeve, and the rotating rod is fixedly connected to the valve stem of the valve; the wedge plate assembly is set between the end face of the sliding sleeve and the fixed sleeve that are rotatably connected and the end face of the drive shaft.

[0011] Preferably, the wedge assembly consists of two opposing annular arrays of protruding wedges, respectively disposed on the end face of the sliding sleeve and the end face of the drive shaft, for converting the axial movement of the drive shaft into the rotation of the sliding sleeve.

[0012] Preferably, the triggering mechanism includes an L-shaped tooling plate and a triggering wedge. The horizontal plate of the L-shaped tooling plate is fixed to the lower template, and the triggering wedge is fixed to the top of the vertical plate with the side facing the inner cavity of the mold being inclined. One end of the drive shaft extending out of the baffle works in conjunction with the triggering wedge.

[0013] Preferably, the height of the trigger wedge is located above the die holder, so that the drive shaft does not contact the trigger wedge during normal stripping, and the drive shaft contacts the inclined surface of the trigger wedge and is pushed when the material is jammed.

[0014] Preferably, two limiting rings are fixed to the outside of the drive shaft. One limiting ring is located inside the insertion hole and is provided with a return spring between it and the step of the inner wall of the insertion hole. The other limiting ring abuts against the end wall of the transverse wedge block facing the mounting hole.

[0015] Preferably, the valve has a closed state. When the distance between the stripper plate and the fixed plate is compressed to the minimum, the valve is closed to block the hydraulic damping circuit and lock the stripper plate in the upper position.

[0016] The present invention has the following advantages: (1) Compared with the above-mentioned background technology, the punching die for the stripper plate provided by the present invention combines the elastic element with the hydraulic damping mechanism, so that the stripper plate can quickly reset during normal stripping without affecting production efficiency; and once jamming or delayed stripping occurs, the hydraulic damping mechanism will automatically increase the damping force according to the degree of jamming, so as to significantly reduce the rebound speed of the stripper plate, thereby reducing the situation where the stripper plate impacts the lower die at high speed when the spring potential energy is suddenly released. In the extreme working condition of the most severe jamming, the hydraulic damping mechanism can completely lock the stripper plate in the upper position, reducing the risk of the stripper plate falling down. This graded response mechanism solves the safety hazard of uncontrollable release of potential energy after jamming in the traditional elastic stripping structure, reduces the impact noise during equipment operation, and effectively protects the personal safety of operators, reducing the occurrence of accidents caused by the sudden fall of the stripper plate hitting the hand.

[0017] (2) Compared with the above-mentioned background technology, the punching die for the hanging plate provided by the present invention takes into account both the continuity and stability of production while ensuring safety. Since the hydraulic damping mechanism only intervenes to adjust when the stripper plate jams or the stripping is delayed, it does not cause additional interference to the stripping process under normal working conditions, and therefore does not affect the normal working efficiency of the die. At the same time, it can adaptively adjust the damping force according to the degree of jamming, without the need for manual judgment or intervention, thus reducing the technical threshold and labor intensity of operators. In addition, by reducing the high-speed impact of the hanging plate on the lower die, it also reduces the impact damage to key working components such as the die cutting edge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the upper mold structure of the present invention; Figure 3 This is a schematic diagram of the lower mold structure of the present invention; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the damping component structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the damping cylinder of the present invention; Figure 7 This is a schematic diagram of the fixing plate structure of the present invention; Figure 8 This is a schematic cross-sectional view of the transverse wedge block structure of the present invention; Figure 9 For the present invention Figure 5 A magnified schematic diagram of the structure at point B.

[0020] In the diagram: 1. Upper mold; 2. Lower mold; 3. Punch; 4. Elastic component; 5. Die cutter edge; 6. Outer guide assembly; 7. Inner guide assembly; 8. Limiting groove; 9. Connecting pipe; 10. Piston; 11. Rod; 12. Mounting hole; 13. Mounting groove; 14. Through hole; 15. Slide rail; 16. Baffle; 17. Insertion hole; 18. Rotating rod; 19. Protruding wedge; 20. Limiting strip; 101. Upper template; 102. Upper backing plate; 103. Fixing plate; 104. Stripper plate; 201. Lower template; 202. Lower backing plate; 203. Die base; 401. Stripping spring; 402, Equalizing screw; 403, Speed ​​reduction mechanism; 404, Triggering mechanism; 4031, Damping component; 4032, Control component; 4311, Damping cylinder; 4312, Oil reservoir; 4313, Valve; 4321, Horizontal wedge; 4322, Longitudinal wedge; 4323, Support spring; 4324, Rotary drive unit; 3241, Drive shaft; 3242, Limiting ring; 3243, Return spring; 3244, Sliding sleeve; 3245, Fixed sleeve; 3246, Wedge plate assembly; 4041, L-shaped tooling plate; 4042, Trigger wedge. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] This invention provides a punching die for a hanging plate, whose hydraulic damping mechanism adaptively adjusts the rebound speed of the stripper plate according to the degree of material jamming, and locks the stripper plate in the event of extreme material jamming. This significantly reduces the risk of sudden impact of the hanging plate on the lower die, ensures operational safety, and reduces impact noise. It also solves the problem that in the stripping mechanism of existing hanging plate punching dies, the elastic element suffers fatigue attenuation during long-term use, resulting in uneven force distribution, which leads to material jamming or delayed stripping. After material jamming, the sudden release of the potential energy accumulated in the elastic element causes the hanging plate to impact the lower die at high speed, generating noise and posing a safety hazard to the operator.

[0024] Please refer to this as well. Figures 1 to 3 The present invention provides a punching die for a hanging plate, comprising an upper die 1 and a lower die 2. The upper die 1 consists of an upper template 101, an upper backing plate 102, a fixing plate 103, and a stripping plate 104. The upper backing plate 102 is disposed below the upper template 101, and the fixing plate 103 is located below the upper backing plate 102; both are detachably fixed to the bottom surface of the upper template 101 by screws. A punch 3 is inserted into the fixing plate 103, and the punch 3 is fixed within the fixing plate 103 by a mounting bracket. Its bottom end is a cutting edge extending below the fixing plate 103. The upper backing plate 102 is hardened, resulting in a higher hardness than the upper template 101. The mounting bracket at the top of the punch 3 abuts against the upper backing plate 102, with the upper backing plate 102 bearing the reaction force from repeated impacts of the punch 3, preventing the harder punch 3 from causing a dent on the lower surface of the upper template 101, thereby ensuring the positioning accuracy of the punch 3.

[0025] Please refer to this as well. Figures 1 to 3 The stripper plate 104 is positioned below the fixed plate 103, with a certain gap between them to provide upward movement space for the stripper plate 104. The stripper plate 104 has a clearance hole for engaging with the punch 3, which is slidably inserted into the clearance hole. An elastic element 4 is installed between the stripper plate 104 and the fixed plate 103. Under normal conditions, the lower end face of the stripper plate 104 is lower than the lower end face of the die cutting edge 5, meaning the die cutting edge 5 is concave relative to the lower end face of the stripper plate 104, thus ensuring reliable stripping after punching.

[0026] The lower die 2 includes a lower template 201, a lower backing plate 202, and a die holder 203. The lower backing plate 202 is located above the lower template 201, and the die holder 203 is located above the lower backing plate 202. Both are detachably fixed to the top surface of the lower template 201 by screws. The die holder 203 has a lower die cutting edge that matches the punch 3 of the upper die 1, extending through the upper and lower end faces of the die holder 203. The lower die cutting edge has a tapered structure along the height direction of the die holder 203: near the upper end face of the die holder 203 is a short, straight-walled hole, which is the cutting edge section, mainly responsible for cooperating with the upper punch 3 to complete the punching and cutting; this cutting edge section can be an insert structure, detachably connected to the die holder 203 by screws, so that the worn cutting edge can be disassembled and polished later. The part below the cutting edge section gradually widens downwards, allowing the waste generated during punching to be discharged smoothly. In addition, the lower pad plate 202 and the lower template 201 are both provided with waste material holes corresponding to the lower die cutting edge to guide the waste material to fall; a pad foot is also provided below the lower template 201.

[0027] An external guide assembly 6 is installed between the upper template 101 and the lower template 201 for guiding and limiting. Specifically, the guide post of the guide assembly is fixedly installed on the lower template 201, and the guide sleeve of the guide assembly is installed on the upper template 101. When the mold is closed, the relative position of the upper template 101 and the lower template 201 is precisely limited by the cooperation of the guide post and the guide sleeve.

[0028] To further improve punching accuracy, an inner guide assembly 7, including an inner guide post and an inner guide sleeve, is provided between the fixed plate 103 and the die holder 203. The inner guide sleeve is installed inside the die holder 203, while the inner guide post is installed on the fixed plate 103. A through hole is provided on the stripper plate 104 to mate with the inner guide post, allowing the bottom end of the inner guide post to extend below the stripper plate 104. During mold closing, the inner guide post is inserted into the inner guide sleeve, achieving more precise guiding and limiting.

[0029] In addition, a limiting groove 8 is recessed on the upper end face of the die holder 203, and the shape of the limiting groove 8 is consistent with the outline of the hanging plate to be processed. During the punching operation, the hanging plate is placed in the limiting groove 8, and the position of the hanging plate can be accurately positioned by the limiting groove 8 to ensure the accuracy of the punching position.

[0030] With the above setup, during the punching operation, the upper die 1 is first fixed to the upper slide of the punch press by a pressure plate, and the lower die 2 is fixed to the lower table of the punch press by a pressure plate. During punching, the hanging plate is placed in the limiting groove 8 on the upper end face of the die holder 203, and then the punch press is started to lower the upper die 1 to close the die. In the initial stage of die closing, the outer guide post and guide sleeve assembly first provides preliminary guidance and limitation for the upper and lower dies 2; then the stripper plate 104 contacts the upper surface of the die holder 203, and at the same time, the inner guide post and inner guide sleeve begin to engage and insert, achieving more precise guidance. As the upper die 1 continues to move down, the stripper plate 104 is blocked by the die holder 203 and stops moving down, while the punch 3 overcomes the resistance of the elastic element 4 and continues to move down, with its cutting edge extending out of the lower end face of the stripper plate 104 and engaging with the cutting edge of the lower die to complete the punching. After punching is completed, the upper mold 1 begins to move upward. At this time, the punch 3 is still inserted inside the punch hole of the hanging plate. Under the action of the elastic element 4, the stripper plate 104 moves downward relative to the fixed plate 103, pushing the hanging plate away from the punch 3, so as to avoid the hanging plate getting stuck on the punch 3, thus successfully completing one punching operation.

[0031] The above operations can complete the punching process of the mounting plate. However, in actual production, with repeated punching over a long period of time, the elastic element 4 (usually made of urethane or a spring) at the stripper plate 104 will fatigue due to continuous compression. To ensure uniform force on the stripper plate 104, multiple elastic elements 4 are usually evenly arranged between the stripper plate 104 and the fixed plate 103 along the position and number of the punch 3. However, when fatigue accumulates, these elastic elements 4 often experience varying degrees of performance degradation, some with weakened elasticity and some with permanent deformation, causing the stripper plate 104 to be unevenly stressed during elastic lifting and lowering, resulting in skewing or local jamming. For plates with a large thickness like the mounting plate, the number of punches is usually more than one, and the spacing between the holes is far. This unevenness will further increase the frictional resistance between the stripper plate 104 and the punch 3, making it impossible for the punch 3 to detach smoothly from the mounting plate after punching, thus causing the upper die to jam or the stripper to be delayed.

[0032] During normal stripping, the rebound speed of the stripper plate 104 when the elastic element 4 is released is actually controlled by the upward movement speed of the upper die 1, rather than entirely determined by the elastic element 4 itself. Because the upper die 1 is pulled up at a constant speed by the slide of the punch press, the stripper plate 104 moves down slowly relative to the fixed plate 103, allowing the hanging plate to smoothly and with low impact detach from the punch 3. However, once delayed stripping or jamming occurs, the situation is completely different: when the stripper plate 104 has risen with the upper die 1 to create a sufficient gap between itself and the die holder 203, but the hanging plate has not yet detached from the punch 3, the compressive potential energy continuously accumulated by the elastic element 4 will be suddenly released at a certain critical point, pushing the stripper plate 104 to bounce down sharply, causing the hanging plate to gain a large kinetic energy in a very short time and impact the lower die at high speed. This not only generates huge impact noise, causing psychological tension and even fear to operators, but more seriously, if the upper mold 1 has completed its reset and stopped at the top dead center, but the hanging plate is still stuck on the punch 3 unnoticed, the operator, based on the muscle memory formed by long-term repetitive work, will often reflexively reach out to pick up the hanging plate. At this time, the material is suddenly released and the hanging plate suddenly bounces down, which can easily injure the operator's hand and cause a serious safety accident.

[0033] To effectively reduce the aforementioned problems of material jamming and sudden impact caused by fatigue of the elastic element 4, this embodiment features an innovative design for the elastic element 4, enabling it to have locking and adaptive speed reduction functions. During punching operations, if the stripper plate 104 jams and the upper die 1 has risen to the height separating from the lower die 2, the elastic element 4 can automatically reduce the rebound speed according to the specific jamming situation. Furthermore, the degree of deceleration is dynamically adjusted based on the actual compression of the elastic element 4 after the stripper plate 104 jams; that is, the smaller the distance between the stripper plate 104 and the fixed plate 103, the stronger the suppression of the rebound speed of the stripper plate 104 by the elastic element 4, thereby achieving incremental speed reduction and fundamentally curbing the risk of high-speed impact.

[0034] Please refer to this as well. Figure 1 , Figure 2 , Figure 4 as well as Figure 5 Specifically, the elastic element 4 firstly includes a stripping spring 401 for providing stripping force and equalizing screws 402. Multiple stripping springs 401 are evenly arranged between the stripping plate 104 and the fixing plate 103 along the number and position of the punches 3 to ensure that the stripping plate 104 is subjected to balanced force during the stripping process. At the same time, equalizing screws 402 are evenly distributed along the four sides between the stripping plate 104 and the upper template, which on the one hand keep the stripping plate 104 in a horizontal position, and on the other hand limit its movement to prevent accidental detachment.

[0035] More importantly, the elastic element 4 also includes a speed-reducing mechanism 403 disposed between the stripper plate 104 and the fixed plate 103, and a triggering mechanism 404 disposed between the upper and lower templates. The speed-reducing mechanism 403 is specifically designed to effectively suppress the rebound speed of the stripper plate 104 when material jamming occurs. The degree of suppression depends on the distance between the stripper plate 104 and the fixed plate 103 after material jamming, that is, the actual compression of the stripper spring 401. In other words, when material jamming or delayed stripping occurs on the stripper plate 104, the closer the stripper plate 104 is to the fixed plate 103, the greater the compression of the stripper spring 401. If material is suddenly stripped at this time, the impact force on the material will be proportional to the spring compression; that is, the greater the compression, the more violent the impact. In this embodiment, the speed-reducing mechanism 403 makes the rebound speed slower when the compression of the stripper spring 401 is greater, thereby significantly reducing the impact force.

[0036] Please refer to this as well. Figures 4 to 7The core of the deceleration mechanism 403 consists of a damping element 4031 and a control element 4032. The damping element 4031 is installed between the fixed plate 103 and the stripper plate 104, and its main function is to regulate the rebound speed of the stripper plate 104. Under normal working conditions, the damping element 4031 maintains minimum damping to ensure that the stripper spring 401 can freely compress and rebound; when jamming occurs, the control element 4032 will intervene to adjust the damping force of the damping element 4031, thereby slowing down the rebound speed of the stripper plate 104. The damping element 4031 specifically includes a damping cylinder 4311, an oil reservoir 4312, and a valve 4313. The oil reservoir 4312 is fixed to the upper template with screws, and the damping cylinder 4311 is located below the oil reservoir 4312. The two are fixedly connected by a connecting pipe 9 and their internal cavities are connected. A valve 4313 is installed at the connecting pipe 9 to adjust the flow area. The damping cylinder 4311 contains a piston 10, which slides and seals against the cylinder wall. A rod 11 is fixed to the bottom end of the piston 10, extending through the bottom end wall of the damping cylinder 4311 to the lower outside. Its protruding end is fixed to the stripper plate 104 by screws. A sealing element achieves a movable seal between the rod 11 and the end of the damping cylinder 4311. The damping cylinder 4311 is filled with oil. During the stamping process, the rebound speed of the stripper plate 104 can be controlled by the damping element 4031. Under normal conditions, valve 4313 is at its maximum opening. When stripper plate 104 rises under the pressure of the punch press and approaches fixed plate 103, rod 11 moves upward with stripper plate 104 and drives piston 10 to move upward in damping cylinder 4311, pressing the oil in damping cylinder 4311 into upper oil storage cylinder 4312 through valve 4313. After punching is completed and upper die 1 moves upward, stripper plate 104 moves downward and resets under the action of stripper spring 401, rod 11 and piston 10 descend accordingly, and oil in oil storage cylinder 4312 flows back to damping cylinder 4311 through valve 4313 due to pressure difference. In the event of a jam, after the upper mold 1 moves up and separates from the lower mold 2, the stripper plate 104 remains in the jammed position. At this time, the control component 4032 will reduce the opening of the valve 4313, so that the stripper plate 104 will slowly descend when the spring rebounds and moves down due to the obstruction of the oil flow, thereby greatly reducing the impact force of the material rebound, which reduces the risk of safety accidents and significantly reduces the impact noise.

[0037] It should be noted that the fixed plate 103 has a mounting hole 12 inside, and the damping cylinder 4311 and the oil reservoir 4312 are inserted into the mounting hole 12 as a whole, with the bottom end of the damping cylinder 4311 recessed into the mounting hole 12. In addition, at least two sets of the aforementioned speed reduction mechanism 403 are symmetrically arranged between the fixed plate 103 and the stripper plate 104 to ensure force balance.

[0038] The fixing plate 103 also has a recessed mounting groove 13 inside, which penetrates the bottom end face and side wall of the fixing plate 103 and is adjacent to the mounting hole 12. The two are connected by a through hole 14. The control component 4032 includes a transverse wedge 4321, a longitudinal wedge 4322, a support spring 4323, and a rotary drive unit 4324. The transverse wedge 4321 is slidably disposed inside the mounting groove 13 via a slide rail 15, and its movement direction is reciprocating from the mounting hole 12 toward the opening of the side wall of the fixing plate 103; the longitudinal wedge 4322 is fixed to the side of the stripper plate 104 facing the fixing plate 103, and its side surface and the side surface of the transverse wedge 4321 are both inclined surfaces. The wedge surface of the transverse wedge 4321 faces the mounting hole 12, and the inclined surface of the longitudinal wedge 4322 faces the transverse wedge 4321, and the two are aligned longitudinally. A baffle 16 is provided at the opening of the mounting groove 13, and the baffle 16 is fixed to the side wall of the fixing plate 103 by screws. A support spring 4323 is installed between the transverse wedge 4321 and the baffle 16, so that the transverse wedge 4321 is always pushed towards the mounting hole 12 under normal conditions. Under normal conditions, the stripper plate 104 is at its normal height (i.e., the stripper spring 401 is fully released). At this time, the opposing ends of the longitudinal wedge 4322 and the transverse wedge 4321 are separated, and the transverse wedge 4321 remains in its initial position. When punching, the stripper plate 104 moves upward, and the longitudinal wedge 4322 is inserted into the mounting groove 13. It pushes the transverse wedge 4321 towards the baffle 16 through the wedge surface, while compressing the support spring 4323. Subsequently, through the triggering mechanism of the triggering mechanism 404, when jamming occurs, the rotary drive unit 4324 reduces the opening of the valve 4313, thereby reducing the rebound speed of the stripper plate 104.

[0039] Please refer to this as well. Figure 5 , Figures 8 to 9The rotary drive unit 4324 includes a drive shaft 3241, a limiting ring 3242, a return spring 3243, a sliding sleeve 3244, a fixing sleeve 3245, and a wedge assembly 3246. First, a through-hole 17 is formed inside the bottom of the transverse wedge 4321 along its moving direction, and a step is provided inside the through-hole 17. The drive shaft 3241 is slidably inserted into the through-hole 17, with both ends extending to both sides of the transverse wedge 4321. One end of the drive shaft 3241 facing the baffle 16 extends through the baffle 16 to the outside of the baffle 16, while the other end extends into the through-hole 14 between the mounting groove 13 and the mounting hole 12. Two limiting rings 3242 are fixed to the outside of the drive shaft 3241: one limiting ring 3242 is located inside the insertion hole 17, and a return spring 3243 is provided between it and the step inside the insertion hole 17. The return spring 3243 is sleeved on the drive shaft 3241 and is used to push the drive shaft 3241 toward the baffle 16; the other limiting ring 3242 is set outside the transverse wedge 4321 and abuts against the end wall of the transverse wedge 4321 facing the mounting hole 12, thereby axially limiting the drive shaft 3241. Furthermore, a fixing sleeve 3245 is fixed on the end face of the transverse wedge block 4321 facing the mounting hole 12. The fixing sleeve 3245 is sleeved on the outside of the drive shaft 3241, with one end of the drive shaft 3241 facing the mounting hole 12 located inside the fixing sleeve 3245. The other end of the fixing sleeve 3245 is rotatably connected to a sliding sleeve 3244. It should be noted that the rotatable connection between the fixing sleeve 3245 and the sliding sleeve 3244 is axially limited, so that the sliding sleeve 3244 can only rotate relative to the fixing sleeve 3245 and cannot be axially separated. A rotating rod 18 is slidably inserted inside the sliding sleeve 3244. The rotating rod 18 has a polygonal cross section, so it can only move axially within the sliding sleeve 3244 and cannot rotate independently. The other end of the rotating rod 18 extends into the mounting hole 12 and is fixedly connected to the valve stem of the valve 4313. A set of wedge disks 3246 is provided between the end face of the sliding sleeve 3244 that is rotatably connected to the fixed sleeve 3245 and the end face of the drive shaft 3241 that is inside the fixed sleeve 3245.

[0040] The wedge assembly 3246 consists of two opposing, annularly arranged protruding wedges 19. Specifically, the end of the sliding sleeve 3244 inside the fixed sleeve 3245 has multiple protruding wedges 19 arranged circumferentially, and the end face of the drive shaft 3241 inside the fixed sleeve 3245 also has multiple protruding wedges 19 arranged annularly, with the two sets of protruding wedges 19 corresponding one-to-one. When the drive shaft 3241 moves toward the mounting hole 12, the sliding sleeve 3244 rotates due to the interaction of the protruding wedges 19; the sliding sleeve 3244 then drives the valve stem to rotate, thereby adjusting the opening of the valve 4313. Furthermore, the wedge design directly links the moving distance of the drive shaft 3241 to the rotation angle of the sliding sleeve 3244; the more the drive shaft 3241 moves, the greater the rotation angle of the valve stem, thus reducing the opening of the valve 4313 to varying degrees.

[0041] It should also be noted that, as Figure 2 and Figure 4 As shown, the drive shaft 3241 is limited in the circumferential direction by the limiting strip 20 structure at the point where it passes through the baffle 16, ensuring that the drive shaft 3241 can only move axially and cannot rotate.

[0042] Please refer to this as well. Figure 1 as well as Figure 3 The triggering mechanism 404 includes an L-shaped tooling plate 4041 and a trigger wedge 4042. The horizontal plate of the L-shaped tooling plate 4041 is fixed to the lower template, and the trigger wedge 4042 is fixed to the top of the vertical plate and located on the side of the vertical plate facing the inner cavity of the mold; the side of the trigger wedge 4042 facing the inner cavity of the mold is inclined. The end of the aforementioned drive shaft 3241 that extends outward from the baffle 16 works precisely with the trigger wedge 4042.

[0043] The specific positional relationship is as follows: the height of the trigger wedge 4042 is set above the cavity base 203 of the lower mold 2. Under normal conditions, the stripper plate 104 and the fixed plate 103 maintain a normal distance, and the stripper spring 401 is in the released state. At this time, the transverse wedge 4321 and the longitudinal wedge 4322 are separated from each other. The transverse wedge 4321 is maintained in the initial position under the action of the support spring 4323. The length of the drive shaft 3241 extending out of the baffle 16 is a preset value. This extension distance makes the end of the drive shaft 3241 far away from the end face of the trigger wedge 4042, so that they will not contact each other. As punching proceeds, the upper and lower molds 2 close, the stripper plate 104 moves upward, and the longitudinal wedge 4322 is inserted into the transverse wedge 4321, pushing the transverse wedge 4321 to move laterally. Through the fixed sleeve 3245, the sliding sleeve 3244 moves synchronously, and the drive shaft 3241 also moves accordingly. After the mold is fully closed, the drive shaft 3241 extends out of the baffle 16 to its maximum value, at which point its end is in contact with the corresponding surface of the vertical plate. However, during the mold closing and punching stage, the drive shaft 3241 is still below the trigger wedge 4042. The key point is after punching is completed: if the stripper plate 104 ejects material normally and returns to its normal spacing, the support spring 4323 will reset the transverse wedge 4321, and the drive shaft 3241 will retract to its original extension length. When the drive shaft 3241 moves to the horizontal position where the trigger wedge 4042 is located, its extension length is no longer sufficient to contact the trigger wedge 4042, and therefore it will not be triggered. This is because the position of the trigger wedge 4042 is set—after punching and separation of the upper and lower molds 2, the stripper plate 104 is reset first under the action of the stripper spring 401, and then the upper mold 1 continues to move upward, at which point the drive shaft 3241 reaches the horizontal position of the trigger wedge 4042. During normal stripping, the drive shaft 3241 and the trigger wedge 4042 never contact each other. However, once the stripper plate 104 jams, the distance between the stripper plate 104 and the fixed plate 103 will decrease, and the longitudinal wedge 4322 will be inserted into the mounting groove 13 to a certain depth, causing the transverse wedge 4321 to produce a corresponding lateral displacement, and the length of the drive shaft 3241 extending out of the baffle 16 will also increase accordingly. During the process of the upper mold 1 continuing to move upward, the drive shaft 3241 will meet the trigger wedge 4042; the inclined surface of the trigger wedge 4042 is located at the lower end, and the wedge surface forces the drive shaft 3241 to move towards the mounting hole 12, while compressing the reset spring 3243. Since the transverse wedge 4321 is blocked by the longitudinal wedge 4322 and cannot be reset at this time, the drive shaft 3241 moves independently. One end of the shaft drives the sliding sleeve 3244 to rotate by a corresponding angle through the wedge plate group 3246, thereby reducing the opening of the valve 4313 proportionally, and thus reducing the reset speed of the subsequent stripper plate 104.With this setting, different degrees of jamming on the stripper plate 104 will cause the drive shaft 3241 to extend to different lengths, which will then generate different lateral displacements under the guidance of the inclined surface of the trigger wedge block 4042. Finally, the wedge plate group 3246 will convert the differential adjustment of the valve 4313 opening to achieve adaptive speed reduction control.

[0044] It should be noted that valve 4313 can also be set to a closed state according to the maximum compression of the stripper spring 401, thereby locking the stripper plate 104. Specifically, when the stripper plate 104 experiences severe jamming during punching, causing the distance between it and the fixed plate 103 to be compressed to its minimum, the stripper spring 401 is in a state of maximum compression, and the elastic potential energy accumulated by the stripper plate 104 also reaches its peak. Under this extreme condition, by triggering the interaction between the wedge block 4042 and the drive shaft 3241, valve 4313 can be directly closed to zero opening, thus blocking the hydraulic damping circuit. In this way, the stripper plate 104 will be firmly locked in the upper position by the hydraulic system and will not be able to rebound downwards. This eliminates the possibility of the hanging plate suddenly rebounding and impacting the lower die, providing the highest level of safety for the operator. In other words, at the moment of most severe jamming, the system automatically switches to the "locked" mode, making the stripper plate 104 a stable mechanical barrier, reducing safety accidents and noise disturbances caused by the sudden release of spring potential energy.

[0045] Before the punching operation in this embodiment, the upper die 1 is fixed to the slide block of the punch press, and the lower die 2 is fixed to the lower table of the punch press. The plate to be processed is placed in the limiting groove 8 on the upper end face of the die holder 203, and the limiting groove 8 is used to accurately position the plate. After the punch press is started, the upper die 1 descends to enter the die closing process. In the initial stage of die closing, the outer guide post and guide sleeve assembly first guides and limits the upper and lower dies 2; then the stripper plate 104 contacts the upper surface of the die holder 203, and at the same time the inner guide post and inner guide sleeve begin to engage and insert, achieving more precise guidance. As the upper die 1 continues to move down, the stripper plate 104 is blocked by the die holder 203 and stops descending, while the punch 3 overcomes the resistance of the elastic element 4 and continues to move down, its cutting edge extending out of the lower end face of the stripper plate 104 and engaging with the cutting edge of the lower die to complete the punching.

[0046] After punching is completed, the upper die 1 begins to move upward. Under normal stripping conditions, the stripper plate 104 moves downward relative to the fixed plate 103 under the action of the elastic element 4, smoothly pushing the hanging plate away from the punch 3 to complete stripping. At this time, the deceleration mechanism 403 in the elastic element 4 maintains a minimum damping state to ensure that the stripping spring 401 can rebound freely; at the same time, the transverse wedge 4321 and the longitudinal wedge 4322 in the control element 4032 are separated from each other, and the length of the drive shaft 3241 extending out of the baffle 16 is relatively short, so it will not contact the trigger wedge 4042 during the process of rising with the upper die 1. Therefore, the valve 4313 maintains its maximum opening, and the stripper plate 104 resets normally.

[0047] If jamming or delayed material removal occurs, the distance between the stripper plate 104 and the fixed plate 103 decreases, the depth of the longitudinal wedge 4322 inserted into the mounting groove 13 increases, and the transverse wedge 4321 is pushed to produce a larger lateral displacement, causing the length of the drive shaft 3241 extending out of the baffle 16 to increase accordingly. As the upper mold 1 continues to move upward, the end of the drive shaft 3241 meets the inclined surface of the trigger wedge 4042, and is forced to move towards the mounting hole 12 under the guidance of the inclined surface, while compressing the return spring 3243. Since the transverse wedge 4321 is blocked by the longitudinal wedge 4322 and cannot be reset at this time, the individual movement of the drive shaft 3241 drives the sliding sleeve 3244 to rotate through the wedge plate assembly 3246, thereby rotating the valve stem and reducing the opening of the valve 4313. The more severe the jamming on the stripper plate 104, the deeper the longitudinal wedge 4322 inserts, the longer the drive shaft 3241 extends, and the greater the displacement of the drive shaft 3241 pushed by the trigger wedge 4042. This also reduces the opening of the valve 4313, thus achieving incremental speed reduction control of the stripper plate 104's rebound speed. In extreme jamming situations, when the distance between the stripper plate 104 and the fixed plate 103 is compressed to its minimum, the stripper spring 401 is in its maximum compression state. At this time, the drive shaft 3241 is pushed to its limit position by the trigger wedge 4042, the valve 4313 is closed, the hydraulic damping circuit is completely blocked, and the stripper plate 104 is firmly locked in the upper position by the hydraulic system, preventing it from rebounding downwards. This reduces the safety hazard of the hanging plate suddenly rebounding and impacting the lower die. Throughout the process, the elastic element 4 automatically adjusts the damping force according to the specific jamming situation, achieving adaptive speed reduction and locking functions, effectively reducing jamming impacts and safety accidents caused by fatigue of the elastic element 4.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A punching die for a hanging plate, comprising an upper die (1) and a lower die (2), wherein the upper die (1) is composed of an upper template (101), an upper backing plate (102), a fixing plate (103), and a stripper plate (104), and the lower die (2) comprises a lower template (201), a lower backing plate (202), and a die holder (203), characterized in that, An elastic element (4) is provided between the fixing plate (103) and the stripping plate (104) of the upper mold (1), and a triggering mechanism (404) is also provided between the upper mold and the lower mold. The elastic element (4) includes a stripping spring (401), a height equalizing screw (402), and a speed reduction mechanism (403); the speed reduction mechanism (403) is disposed between the stripping plate (104) and the fixing plate (103) and is used to suppress the rebound speed of the stripping plate (104) when the stripping plate (104) jams. The triggering mechanism (404) is used to trigger the deceleration mechanism (403) to operate when a jam occurs.

2. The punching die for a hanging panel according to claim 1, characterized in that, The speed reduction mechanism (403) includes a damping element (4031) and a control element (4032). The damping element (4031) is installed between the fixed plate (103) and the stripping plate (104). The control element (4032) is used to adjust the damping force of the damping element (4031).

3. The punching die for a hanging panel according to claim 2, characterized in that, The damping component (4031) includes a damping cylinder (4311), an oil reservoir (4312), and a valve (4313); the oil reservoir (4312) is fixed to the upper template (101), the damping cylinder (4311) is located below the oil reservoir (4312) and connected by a connecting pipe (9), and a valve (4313) is installed at the connecting pipe (9). The damping cylinder (4311) is equipped with a piston (10), and a rod (11) is fixed at the bottom of the piston (10). The rod (11) passes through the bottom of the damping cylinder (4311) and is fixedly connected to the stripper plate (104). The damping cylinder (4311) is filled with oil.

4. A punching die for a hanging panel according to claim 3, characterized in that, The control unit (4032) includes a transverse wedge (4321), a longitudinal wedge (4322), a support spring (4323), and a rotary drive unit (4324). The fixed plate (103) has an installation groove (13) inside, the transverse wedge (4321) is slidably disposed in the installation groove (13), the longitudinal wedge (4322) is fixed to the side of the stripper plate (104) facing the fixed plate (103), and the inclined surface of the longitudinal wedge (4322) cooperates with the inclined surface of the transverse wedge (4321); The support spring (4323) is located between the transverse wedge (4321) and the baffle (16) at the opening of the mounting groove (13), and is used to push the transverse wedge (4321) toward the mounting hole (12).

5. A punching die for a hanging panel according to claim 4, characterized in that, The rotary drive unit (4324) includes a drive shaft (3241), a limiting ring (3242), a return spring (3243), a sliding sleeve (3244), a fixing sleeve (3245), and a wedge assembly (3246); the drive shaft (3241) is slidably inserted into the insertion hole (17) at the bottom of the transverse wedge (4321), and its two ends extend to both sides of the transverse wedge (4321); One end of the drive shaft (3241) facing the baffle (16) passes through the baffle (16), and the other end extends into the through hole (14) between the mounting groove (13) and the mounting hole (12); the fixed sleeve (3245) is fixed to the end face of the transverse wedge (4321) facing the mounting hole (12), the sliding sleeve (3244) is rotatably connected to the other end of the fixed sleeve (3245) and axially limited, a polygonal cross-section rotating rod (18) is slidably inserted in the sliding sleeve (3244), and the rotating rod (18) is fixedly connected to the valve stem of the valve (4313); the wedge plate assembly (3246) is located between the end face of the sliding sleeve (3244) and the fixed sleeve (3245) that are rotatably connected and the end face of the drive shaft (3241).

6. A punching die for a hanging panel according to claim 5, characterized in that, The wedge assembly (3246) consists of two opposing annular arrays of protruding wedges (19), which are respectively disposed on the end face of the sliding sleeve (3244) and the end face of the drive shaft (3241) to convert the axial movement of the drive shaft (3241) into the rotation of the sliding sleeve (3244).

7. A punching die for a hanging panel according to claim 5, characterized in that, The triggering mechanism (404) includes an L-shaped tooling plate (4041) and a triggering wedge (4042). The horizontal plate of the L-shaped tooling plate (4041) is fixed to the lower template, and the triggering wedge (4042) is fixed to the top of the vertical plate and the side facing the inner cavity of the mold is inclined. The end of the drive shaft (3241) extending out of the outside of the baffle (16) works in conjunction with the triggering wedge (4042).

8. A punching die for a hanging panel according to claim 7, characterized in that, The height of the trigger wedge (4042) is above the die holder (203), so that the drive shaft (3241) does not contact the trigger wedge (4042) during normal stripping, and the drive shaft (3241) contacts the inclined surface of the trigger wedge (4042) and is pushed when the material is jammed.

9. A punching die for a hanging panel according to claim 5, characterized in that, Two limiting rings (3242) are fixed to the outside of the drive shaft (3241). One of the limiting rings (3242) is located inside the insertion hole (17) and is provided with a return spring (3243) between it and the step of the inner wall of the insertion hole (17). The other limiting ring (3242) abuts against the end wall of the transverse wedge (4321) facing the mounting hole (12).

10. A punching die for a hanging panel according to claim 3, characterized in that, The valve (4313) is in a closed state. When the distance between the stripper plate (104) and the fixed plate (103) is compressed to the minimum, the valve (4313) is closed to block the hydraulic damping circuit and lock the stripper plate (104) in the upper position.

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