Punching guiding and positioning jig of punching machine

Abstract

The invention discloses a punching guiding and positioning jig of a punching machine, and relates to the technical field of punching machine material guiding structures. The machine frame extends along a strip feeding path and spans from the feeding side of the punching area to the discharging side of the punching area; supporting frames with adjustable intervals are arranged on the two sides of the top of the rack respectively; the clamping and conveying assemblies are symmetrically installed on the rack and used for clamping the edges of the two sides of the strip in the width direction and driving the strip to be conveyed in a straight line. By arranging the clamping array running along with the endless flexible carrier, line contact high-pressure conveying of traditional rollers is converted into multi-point distributed surface contact linear clamping, in the linear conveying area, the multiple clamping pincers are closed at the same time and share traction force together, the clamping pressure on the unit area is greatly reduced, and the clamping efficiency is improved. The method is particularly suitable for a net-shaped waste framework with reduced strength after punching, and material tensile deformation or fracture caused by local stress concentration is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of punch press material guiding structure technology, and specifically to a punch press punching guide and positioning fixture. Background Technology

[0002] With the development of precision electronics and new energy industries, the requirements for the precision and production efficiency of stamped products are increasing. Currently, in the continuous stamping of coiled materials, simple positioning and cornering are typically done at the product edges using adhesive materials such as double-sided tape. However, this primitive method has many drawbacks in stamping operations: First, the material is prone to deviation, resulting in uneven coiling and unwinding, frequently requiring machine stoppages and die readjustment. This not only wastes time but also causes inconsistent distances between individual pieces of material and the edge of the coil, resulting in uneven cut edges and severely affecting the machine bonding accuracy of subsequent processes. Second, this method not only causes significant material waste but also leads to difficulties in unwinding, making it impossible to guarantee stable product quality and failing to provide reliable positioning. More seriously, because operators must reach into the dangerous area of ​​the die to retrieve materials during die adjustment, mechanical failures or human negligence can easily lead to workplace accidents, posing a significant safety hazard. Furthermore, this method is also characterized by low efficiency and high waste.

[0003] To address the aforementioned problems, Chinese Patent Publication No. CN102975230A has been proposed in the prior art to solve the technical issues mentioned above. The technical solution disclosed in this patent document is as follows: "It includes a first limiting block; the first limiting block is fixed on the worktable of the punch press and rests against the edge of the punching material. The present invention also provides a punching guide positioning method for punching, which uses the above-mentioned punching guide positioning fixture for punching. By setting the limiting block on the worktable of the punch press and the edge of the punching material, the punching material runs according to the position and path defined by the limiting block. Through the function of the limiting block, the position of the punching material continuously passing through the worktable of the punch press is limited, so that it passes through the worktable at a predetermined position, avoiding deviation of the punching material and providing guidance and positioning for the punching material. It can be extended to the continuous punching process of roll materials such as face keys, line keys, base adhesive, release film, and protective film of all membrane key switches and ITO products."

[0004] However, the aforementioned patented technology and existing roller conveying technology have insurmountable drawbacks when processing thin or punched waste materials that form a fragile mesh skeleton: This solution uses static limiting blocks, which means there is continuous sliding friction between the material edges and the limiting blocks. For a mesh-like waste skeleton that has lost most of its solid support and has an extremely unstable structure, this edge friction resistance can easily cause the fragile skeleton to arch, stack, or even break during transportation. Existing drive methods often involve roller traction, with the rollers applying pressure via line contact. To prevent slippage, a large clamping force must be applied, which is fatal to the fragile mesh skeleton. This can easily cause the skeleton to stretch and deform at stress concentration points or even break directly. Furthermore, the rollers cannot fundamentally constrain the material's microscopic serpentine deviation in the horizontal direction, leading to interlayer misalignment or direct breakage of the waste material during the rear winding process, causing the machine to stop. Summary of the Invention

[0005] The purpose of this invention is to provide a punching guide and positioning fixture for punching presses. Addressing the problem of fragile waste materials being easily broken, this invention uses a cyclic clamping array combined with regional mechanical drive to achieve high-speed continuous conveying with low-stress surface contact, thus completely solving the problems of belt breakage and deviation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A punching guide and positioning fixture for a punch press includes a punch press body; it also includes: a frame extending along the strip feeding path, spanning from the feed side to the discharge side of the punching area; adjustable-spaced support frames are respectively provided on both sides of the top of the frame; a clamping and conveying assembly symmetrically mounted on the frame for clamping the two sides of the strip width and driving the strip to be conveyed in a straight line; the clamping and conveying assembly includes: a circulating drive unit mounted on the support frame, including a drive wheel, a driven wheel and an endless flexible carrier wound around it; a clamping array including a plurality of clamping clamps spaced apart along the running direction of the endless flexible carrier; a clamping control unit disposed on the running path of the endless flexible carrier; the clamping clamps circulate unidirectionally with the endless flexible carrier; the clamping control unit is configured to: drive the clamping clamps to switch to a closed clamping state when the clamping clamps run into a preset straight conveying area to maintain a straight contact clamping of the strip edge; drive the clamping clamps to switch to a reset and release state when the clamping clamps run away from the straight conveying area.

[0007] By adopting the above technical solution, the traditional line contact high-pressure conveying of rollers is transformed into multi-point distributed surface contact linear clamping by setting up a clamping array that moves with the endless flexible carrier. In the linear conveying area, several clamping clamps close simultaneously and share the traction force, which greatly reduces the clamping pressure per unit area. It is particularly suitable for mesh waste skeletons whose strength is reduced after punching, and effectively avoids material tensile deformation or fracture caused by local stress concentration.

[0008] A further improvement of the technical solution of the present invention is as follows: the clamping clamp includes a clamping seat fixedly connected to an endless flexible carrier. A slide rod is fixedly connected inside the clamping seat, and movable jaws are symmetrically slidably connected to the outside of the slide rod. A fixing block is fixedly connected to the middle position of the inner cavity of the clamping seat. A first spring is sleeved on the outside of the slide rod, between the movable jaws and the fixing block. The first spring is used to provide an opening force to move the two movable jaws away from each other. A follower roller is rotatably connected to the side of each movable jaw away from the clamping surface. In conjunction with the clamping clamp, the clamping control unit includes an upper drive rail and a lower drive rail set on a support frame. The upper drive rail and the lower drive rail are symmetrically distributed in the vertical direction. Their structures each include a flat action area in the middle, a disengagement area at both ends, and a wedge-shaped transition area for connecting the two areas. When the clamping clamp moves with the endless flexible carrier past the drive rails (upper drive rail and lower drive rail), the follower rollers, wedge-shaped transition areas, and flat action areas cooperate through mechanical compression to overcome the elastic force of the first spring and drive the two movable jaws to close.

[0009] By adopting the above technical solution, a purely mechanical structure consisting of a clamp seat, a slide bar, a first spring, and a follower roller, combined with an upper drive rail and a lower drive rail fixed on a support frame, is used to achieve complete separation between the stationary drive source (drive rail) and the moving actuator (clamping clamp). The entire cyclical motion of the endless flexible carrier has no electrical components or cables, eliminating the risk of cable breakage and significantly reducing manufacturing costs and maintenance difficulty.

[0010] A further improvement of the technical solution of the present invention is as follows: the support frame is provided with a fixed seat and a horizontal slide inside; the fixed seat is fixedly installed on the inner side of the support frame, and the horizontal slide is slidably connected to the inner side of the support frame and can move closer to or further away from the fixed seat in the horizontal direction; the support frame is provided with a scissor linkage assembly, which includes two cross links that are rotatably connected to each other in the middle; the ends of the two cross links are rotatably connected to adjusting sliders; the two adjusting sliders located on one side of the fixed seat are slidably connected to the vertical guide rail of the fixed seat and have only vertical movement freedom; the two adjusting sliders located on one side of the horizontal slide are slidably connected to the vertical guide rail of the horizontal slide and have a composite degree of freedom of moving horizontally with the horizontal slide and moving vertically along the vertical guide rail; an electric push rod is fixedly installed inside the support frame, and the output end of the electric push rod is fixedly connected to the horizontal slide for driving the horizontal slide to move horizontally.

[0011] By adopting the above technical solution, the solution utilizes the geometric symmetry characteristics of the scissor linkage component, and in conjunction with the linkage mechanism formed by the hinge of the two cross links in the middle, it ensures that when the mechanism is activated, the upper drive rail and the lower drive rail connected to the adjusting slider on one side of the fixed seat move symmetrically with respect to the central horizontal plane. Therefore, no matter how the thickness of the strip changes, the neutral layer of the clamped strip remains unchanged, perfectly guaranteeing the stability of the stamping feeding baseline.

[0012] A further improvement of the technical solution of the present invention is that: the lower drive rail is rigidly fixed to the lower adjusting slider by bolts, and the upper drive rail is installed on the adjusting slider by an elastic floating component; the elastic floating component includes a pressure seat fixedly connected to the adjusting slider and a plurality of guide columns passing through the inside of the pressure seat, one end of the guide column is fixedly connected to the upper drive rail, and the other end is provided with an anti-detachment limiting structure; a disc spring is sleeved on the outside of the guide column, and the disc spring abuts against the space between the upper drive rail and the pressure seat.

[0013] By adopting the above technical solution, an asymmetrical stiffness design with a rigid lower section and a flexible upper section cleverly balances feeding accuracy and mechanical safety. Specifically, the lower drive rail is rigidly fixed with bolts, establishing an unyielding hard physical benchmark. Regardless of changes in clamping force, the bottom height of the strip remains constant, ensuring that the strip can slide smoothly and unimpeded into the punching die. The upper drive rail is elastically floating with disc springs. Utilizing the physical characteristics of disc springs—short stroke, large load, and high stiffness—a preload threshold far exceeding the normal feeding reaction force is set, allowing the upper drive rail to exhibit stability similar to a rigid connection under normal operating conditions. This solves the drawbacks of soft floating with ordinary springs, triggering the elastic function only under extreme overload conditions. Thus, while ensuring micron-level feeding accuracy, it provides reliable overload and collision protection for expensive precision mechanisms.

[0014] A further improvement of the technical solution of the present invention is that: a piston cylinder is fixedly connected to both the top and bottom of the fixed block, a piston plate is slidably connected between the inner walls of the piston cylinder, a support rod is fixedly connected to the top of the piston plate, the end of the support rod away from the piston plate is fixedly connected to the movable gripper, an air inlet pipe and an air outlet pipe are provided on the piston cylinder, and a one-way valve is provided inside both the air inlet pipe and the air outlet pipe; the airflow rate of the air inlet pipe is less than the airflow rate of the air outlet pipe.

[0015] By adopting the above technical solution, a one-way damping buffer system is constructed through a pneumatic piston structure, realizing the asymmetric motion characteristics of fast retraction and slow reset of the drive rail. Specifically, by setting the air inlet flow rate to be less than the air outlet flow rate, the airflow resistance difference in the piston cavity is precisely controlled. When the guide rail resets under the action of the disc spring, the small flow rate of the air inlet limits the air backfill speed, forming negative pressure damping in the cylinder. This air suction cup effect significantly reduces the rebound speed of the guide rail, allowing it to smoothly softly land to the limit point, effectively eliminating mechanical impact noise and suppressing the residual vibration and shaking after the guide rail resets.

[0016] A further improvement to the technical solution of the present invention is as follows: mounting plates are fixedly connected to the side walls of the upper drive rail and the lower drive rail near the discharge side; a vertical rod is interspersed between the two mounting plates located on the same vertical line; limit blocks are fixedly connected to both ends of the vertical rod; a second spring is sleeved on the outside of the vertical rod and between the limit block and the mounting plate; the two ends of the second spring abut against the limit block and the mounting plate respectively; a guide platform is fixedly connected to the middle of the vertical rod; the side of the guide platform near the incoming material has an arc surface structure that is larger at the top and smaller at the bottom; the vertical rod is a spline rod.

[0017] By adopting the above technical solution, the guide table is set on the arc-shaped guide surface on the discharge path. For waste materials that are adhered to or stuck on the clamping clamp, the guide table acts as a scraper, forcibly breaking the oil film adhesion and peeling it off. At the same time, the arc-shaped geometric feature of the upper part being wider and the lower part being narrower converts the horizontal kinetic energy of the waste material into downward sliding kinetic energy, ensuring that the waste material falls accurately into the waste box or conveyor belt below.

[0018] A further improvement of the technical solution of the present invention is that: a number of guide ribs are arranged at intervals along the vertical direction on the arc-shaped guide surface of the guide platform; the guide ribs protrude from the surface of the arc-shaped guide surface, and their extension direction is consistent with the sliding trajectory direction of the waste material; the cross-sectional structure of the guide ribs is semi-circular, triangular or trapezoidal, which is used to change the contact form between the waste material and the arc-shaped guide surface from surface contact to line contact.

[0019] By adopting the above technical solution, by setting raised guide ribs on the arc surface, the waste material is forced to contact only the top of the ribs, thus artificially creating an air gap between the waste material body and the base surface of the guide platform. This structure completely destroys the continuity of the oil film, eliminates the conditions for vacuum adsorption, and ensures that the waste material will not be adsorbed on the guide platform. Secondly, by using guide ribs to change the contact form from a large area of ​​surface contact to several narrow line contacts, the frictional contact area is significantly reduced. Under the action of gravity, the frictional resistance of the waste material sliding down along the guide ribs is greatly reduced, and even thin and soft materials can be smoothly detached.

[0020] A further improvement of the technical solution of the present invention is as follows: displacement sensors are fixedly installed at symmetrical positions at the bottom of the upper pressure seat; a signal reflection reference surface is set on the top surface of the upper drive rail corresponding to the displacement sensor position; the displacement sensors are electrically connected to the external control system, and the displacement sensors are configured to collect the floating values ​​of four monitoring points; by comparing the value difference of the two sensors on the same side, it is determined whether the upper drive rail has pitched or tilted; by comparing the value difference of the sensors at corresponding positions on the left and right sides, it is determined whether the strip conveying has lateral load imbalance or unilateral breakage.

[0021] By employing the above technical solution and constructing a four-point sensing matrix, the guide fixture is endowed with real-time perception and intelligent diagnostic capabilities for the spatial attitude of the upper drive rail. Specifically, the system utilizes differential data from the front and rear sensors on the same side to accurately monitor the pitch parallelism of the upper drive rail, thereby identifying faults at specific locations such as blockage at the feed inlet (in a head-up posture) or accumulation at the discharge outlet (in a head-down posture). Simultaneously, by utilizing differential data from sensors at corresponding positions on the left and right sides, the system can monitor the lateral balance of the strip conveyor, effectively identifying asymmetric faults such as material breakage, slippage, or deviation on one side. This not only achieves accurate fault location but also effectively filters out common-mode interference caused by overall equipment vibration through differential algorithms, greatly improving the monitoring reliability and safety in high-speed stamping environments.

[0022] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: 1. This invention provides a punching press punching guide and positioning fixture. By setting a clamping array that moves with an endless flexible carrier, the traditional line contact high-pressure conveying of rollers is transformed into multi-point distributed surface contact linear clamping. In the linear conveying area, several clamping clamps close simultaneously and feed material, sharing the traction force, which greatly reduces the clamping pressure per unit area. It is particularly suitable for mesh scrap skeletons whose strength is reduced after punching, and effectively avoids material tensile deformation or fracture caused by local stress concentration.

[0023] 2. This invention provides a punching guide positioning fixture for a punch press. The clamping clamp adopts a purely mechanical structure consisting of a clamping seat, a sliding rod, a first spring, and a follower roller. In conjunction with the upper and lower drive rails fixed on the support frame, it achieves complete separation between the stationary drive source (drive rail) and the moving actuator (clamping clamp). The entire cyclical motion of the endless flexible carrier has no electrical components or cables, eliminating the risk of cable breakage and significantly reducing manufacturing costs and maintenance difficulty.

[0024] 3. This invention provides a punching guide and positioning fixture for a punch press. Utilizing the geometric symmetry of the scissor linkage assembly, and in conjunction with the linkage mechanism formed by the hinged connection of two cross links in the middle, it ensures that when the mechanism is activated, the upper and lower drive rails connected to the adjusting slider on one side of the fixed base move symmetrically with respect to the central horizontal plane. Therefore, regardless of the change in strip thickness, the neutral layer of the clamped strip remains unchanged, perfectly guaranteeing the stability of the stamping feeding baseline.

[0025] 4. This invention provides a punching guide and positioning fixture for a punch press. Through an asymmetrical stiffness design with a rigid lower section and a flexible upper section, it cleverly balances feeding accuracy and mechanism safety. Specifically, the lower drive rail is rigidly fixed with bolts, establishing an unyielding rigid physical benchmark. No matter how the clamping force changes, the bottom height of the strip remains constant, ensuring that the strip can slide smoothly and unimpeded into the punch press die. The upper drive rail is elastically floating and installed using disc springs. Utilizing the physical characteristics of disc springs—short stroke, large load, and high stiffness—a preload threshold much higher than the normal feeding reaction force is set, making the upper drive rail exhibit the stability of a rigid connection under normal working conditions.

[0026] 5. This invention provides a punching guide and positioning fixture for a punch press. A one-way damping buffer system is constructed through a pneumatic piston structure, realizing the asymmetric motion characteristics of fast retraction and slow reset of the drive rail. Specifically, by setting the air inlet flow rate to be less than the air outlet flow rate, the airflow resistance difference in the piston cavity is precisely controlled. When the guide rail resets under the action of the disc spring, the small flow rate of the air inlet limits the air backfill speed, forming negative pressure damping in the cylinder. This air suction cup effect significantly reduces the rebound speed of the guide rail, allowing it to smoothly soft-land to the limit point, effectively eliminating mechanical impact noise and suppressing the residual vibration and shaking after the guide rail resets. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a three-dimensional structural diagram of the entire invention from a first-view perspective; Figure 2 This is a three-dimensional structural diagram of the entire invention from a second perspective; Figure 3 This is a partial three-dimensional structural diagram of the frame of the present invention; Figure 4 This is a side sectional view of the frame structure of the present invention; Figure 5 This is a schematic diagram of the scissor linkage assembly of the present invention; Figure 6 This is a three-dimensional structural diagram of the clamping forceps of the present invention in the clamping state; Figure 7 This is a three-dimensional structural diagram of the clamping forceps of the present invention in the open state; Figure 8 This is a schematic diagram of the upper drive rail structure of the present invention; Figure 9 This is a side cross-sectional view of the clamping forceps of the present invention; In the diagram: 1. Punch press body; 2. Frame; 3. Support frame; 4. Double-acting screw one; 5. Cross linkage; 6. Adjusting slider; 7. Horizontal slide; 8. Vertical guide rail; 9. Upper drive rail; 901. Flat action zone; 902. Wedge transition zone; 903. Disengagement zone; 10. Second guide rod; 11. Guide frame; 12. Fixed seat; 13. Slider one; 14. Electric push rod; 15. Pressure bearing seat; 16. Guide column; 17. Disc spring; 18. Signal reflector base 19. Surface; 20. Waste cutting device; 21. Endless flexible carrier; 22. Fixture seat; 23. Slide rod; 24. Movable gripper; 25. Fixed block; 26. First spring; 27. Follower roller; 28. Piston cylinder; 29. ​​Piston plate; 30. Support rod; 31. Air outlet pipe; 32. Air inlet pipe; 33. Mounting plate; 34. Vertical rod; 35. Limiting block; 36. Second spring; 37. Guide table; 38. Guide rib; 39. Lower drive rail; 30. Displacement sensor. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments.

[0030] Example 1 like Figures 1-9 As shown, the present invention provides a punching guide and positioning fixture for a punch press, including a punch press body 1; further comprising: a frame 2 extending along the strip feeding path, spanning from the feed side to the discharge side of the punching area; adjustable support frames 3 respectively provided on both sides of the top of the frame 2; and a clamping and conveying assembly symmetrically mounted on the frame 2 for clamping the two sides of the strip width and driving the strip to be conveyed in a straight line; the clamping and conveying assembly includes: a circulating drive unit mounted on the support frame 3, comprising a driving wheel, a driven wheel, and an endless flexible carrier wound around it. Body 20; clamping array, including a plurality of clamping clamps spaced apart along the running direction of the endless flexible carrier 20; clamping control unit, disposed on the running path of the endless flexible carrier 20; the clamping clamps circulate unidirectionally with the endless flexible carrier 20; the clamping control unit is configured to: drive the clamping clamps to switch to a closed clamping state when the clamping clamps run into a preset linear conveying area to maintain linear contact clamping of the strip edge; drive the clamping clamps to switch to a reset and release state when the clamping clamps run away from the linear conveying area.

[0031] The punching guide and positioning fixture of the present invention does not operate in isolation, but serves as a key conveying link in a precision stamping automated production line. Therefore, the present invention also discloses a feeding system suitable for the above-mentioned punching guide and positioning fixture, comprising: An active unwinding device is located upstream of the feed side of the punch press. It is used to carry the coiled raw material (such as metal strip or composite film) and controls the unwinding speed through a tension sensor to provide the strip to be processed with constant tension for subsequent processes. Waste cutting device 19 is located in the middle of the circulating drive unit and is used to cut waste. A bidirectional screw 4 is rotatably connected to the inner side of the frame 2. A slider 13 is symmetrically threaded to the outer side of the bidirectional screw 4. At least two first guide rods are fixedly connected to the inner side of the frame 2. Two support frames 3 are symmetrically slidably connected to the outer sides of the first guide rods. The support frames 3 are fixedly connected to the slider 13. A cycle drive unit is set on the support frame 3. One end of the bidirectional screw extends to the outside of the frame 2 and is fixedly connected to a throttle.

[0032] In this embodiment, by setting up a clamping array that moves with the endless flexible carrier 20, the traditional line contact high-pressure conveying of rollers is transformed into multi-point distributed surface contact linear clamping. Within the linear conveying area, several clamping clamps simultaneously clamp and convey, sharing the traction force, which greatly reduces the clamping pressure per unit area. This is particularly suitable for mesh waste skeletons whose strength is reduced after punching, effectively avoiding material tensile deformation or fracture caused by local stress concentration. The circulating drive unit and active unwinding device in the scheme are intermittently operated. When feeding stops, punching and waste cutting are performed. During operation, multiple clamping clamps simultaneously clamp the material and pull it towards the discharge side.

[0033] Furthermore, the solution adopts a unidirectional cycle operation mode, utilizing the rotational motion of the endless flexible carrier 20 to automatically reset the clamping clamp via the non-working path after the working stroke ends. Compared with the traditional reciprocating feeding mechanism, it eliminates the time loss of the return empty stroke, realizes continuous and unidirectional feeding action, and can match the production frequency of high-speed punch presses. The design of frame 2, which spans from the feeding side to the discharge side, combined with the clamping components on both sides, ensures that the edges of the strip are always constrained as it passes through the punching area and during the subsequent discharge process. This not only ensures the straightness of the feeding and prevents serpentine deviation, but also utilizes the rigid support of the clamping clamps to ensure that the waste material can be accurately fed into the cutting or winding equipment at the rear end, solving the problem of blockage in the discharge of soft waste material.

[0034] When the punch press is working, the cycle drive unit starts, and the drive wheel drives the endless flexible carrier 20 (such as a synchronous belt or chain) to perform continuous or intermittent unidirectional cycle operation. Several clamping clamps installed on the carrier move accordingly, forming a flowing clamping chain. When one or a group of clamping clamps on the carrier move with the carrier and enter the preset straight conveying area (i.e., the section where the strip needs to be clamped and conveyed), the clamping clamp interacts with the clamping control unit set on the path. As the endless flexible carrier 20 continues to run, the clamping clamps in the closed state line up and lift the edge of the strip to move forward. Since the clamping and conveying components on both sides of the frame 2 operate synchronously, the strip is subjected to force in the width direction. The material is balanced and smoothly transported through the punching area or sent to the waste disposal area. When the clamping pliers convey the strip to the end of its stroke (such as at the cutting edge of the waste cutting device 19), the material is cut by controlling the waste cutting device 19. The cut material continues to move with the carrier and leaves the linear conveying area. At this time, the clamping pliers are out of the range of the clamping control unit, the driving force is removed, and the clamping pliers automatically switch to the reset and release state under the action of the internal elastic element or the reverse driving force, releasing the strip. After being released, the clamping pliers, along with the endless flexible carrier 20, bypass the driving wheel and the driven wheel, enter the non-working return path, and finally return to the feed port to prepare for the next clamping cycle.

[0035] For the discharge side, using traditional rear-end winding methods to handle such fragile mesh skeletons formed after punching poses significant process risks. Because the mesh skeleton structure loses most of its solid support, its lateral rigidity is extremely poor, making it prone to uncontrollable lateral creep or micro-displacement under continuous winding tension. As the winding diameter increases, these minute lateral deviations accumulate, resulting in uneven end faces of the waste roll and misalignment between layers, forming "pagoda rolls" that are smaller at the top and larger at the bottom or protrude in the middle. More importantly, the uneven skeleton edges are prone to interlocking or snagging between layers, causing a sudden change in resistance during winding, which can directly break the fragile waste strip, forcing the entire automated production line to stop.

[0036] In view of this, the present invention abandons the traditional winding process and proposes an online cutting solution. By integrating a waste cutting device on the path of the circulating drive unit (such as the middle or the discharge end), the continuously output mesh waste is directly cut into fragments and falls naturally into the waste bin. This method fundamentally eliminates the need to apply constant winding tension to the waste strip, completely avoids the risk of "pagoda roll" and strip breakage caused by uneven winding, and ensures the high-speed continuous operation of the stamping production process.

[0037] In the cyclic drive unit, the endless flexible carrier 20 and its matching wheel system can adopt a variety of mature mechanical transmission forms (optional schemes) to meet the requirements of different loads and precision: Synchronous belt drive: The endless flexible carrier 20 uses a polyurethane steel wire core synchronous belt; the surface of the synchronous belt has precision molded teeth (such as T-shaped teeth or circular arc teeth), with an embedded steel wire skeleton to eliminate elastic tension and ensure feeding accuracy; the corresponding driving pulley and driven pulley are synchronous belt pulleys that mesh with the teeth of the synchronous belt. The driving pulley is directly driven by a servo motor through a reducer to achieve precise position control without slippage; several clamping clamps are fixedly connected to the back plane (i.e., non-meshing surface) of the synchronous belt by bolts or vulcanization process at a preset interval; Chain drive: In the case of thick plates or high-strength metal strips, the endless flexible carrier 20 uses a double-row precision roller chain. The corresponding driving wheel and driven wheel are precision sprockets. The base of the clamping clamp is designed with a connection hole that matches the chain pitch. It is directly installed on the extended pin or attachment plate of the chain. The chain drive has extremely high rigidity and tensile strength and is suitable for the forced traction of heavy-duty waste materials. Steel belt drive: In high-speed stamping scenarios for ultra-thin film materials (such as PET below 0.05mm), the endless flexible carrier 20 can be made of high-strength stainless steel belt; the drive wheel is a rubber-coated friction wheel; the steel belt has extremely low inertia and extremely high stability, which can avoid the polygonal effect vibration of the chain or toothed belt when running at high speed, and ensure the smoothness of film material conveying.

[0038] Example 2 like Figure 6 , Figure 7 and Figure 8 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the clamping clamp includes a clamping seat 21 fixedly connected to an endless flexible carrier 20. A slide rod 22 is fixedly connected inside the clamping seat 21, and movable jaws 23 are symmetrically slidably connected to the outside of the slide rod 22. A fixing block 24 is fixedly connected to the middle of the inner cavity of the clamping seat 21. A first spring 25 is sleeved on the outside of the slide rod 22, located between the movable jaws 23 and the fixing block 24. The first spring 25 is used to provide an opening force to move the two movable jaws 23 away from each other. Each movable jaw 23 has a follower roller rotatably connected to the side facing away from the clamping surface. The roller 26, in conjunction with the clamping clamp, includes an upper drive rail 9 and a lower drive rail 38 mounted on the support frame 3. The upper drive rail 9 and the lower drive rail 38 are symmetrically distributed in the vertical direction, and their structures each include a straight action area 901 located in the middle, a disengagement area 903 located at both ends, and a wedge-shaped transition area 902 for connecting the two areas. When the clamping clamp moves along the endless flexible carrier 20 past the drive rails (upper drive rail 9 and lower drive rail 38), the follower roller 26, the wedge-shaped transition area 902, and the straight action area 901 are mechanically squeezed together to overcome the elastic force of the first spring 25 and drive the two movable jaws 23 to close.

[0039] In existing automated conveyor technology, if a specific clamping and releasing action is required on a circulating belt or chain, an electric actuator (such as an electromagnet or micro motor) is usually installed on each clamp. However, this approach has significant engineering drawbacks: expensive conductive slip rings or complex cable chain systems must be used to power the constantly moving "grippers" (clamping devices), and the cables are prone to fatigue and breakage due to repeated bending during high-speed cyclic movement; a large number of sensors and communication lines need to be arranged on the moving parts, and signal transmission is susceptible to electromagnetic interference from the punch press; if an electronic component in a clamp fails, the entire conveyor belt must be disassembled and repaired, severely impacting stamping production efficiency. Therefore, there is an urgent need for a clamping solution that can achieve fixed-point logical actions without laying wiring on the moving parts, relying solely on mechanical structures.

[0040] In this embodiment, the purely mechanical structure consisting of clamp seat 21, slide bar 22, first spring 25 and follower roller 26, combined with the upper drive rail 9 and lower drive rail 38 fixed on the support frame 3, achieves complete separation between the stationary drive source (drive rail) and the moving actuator (clamping clamp). The entire endless flexible carrier 20 of the cyclic movement has no electrical components or cables, eliminating the risk of cable breakage and greatly reducing manufacturing costs and maintenance difficulty. By utilizing the cooperation between the fixed block 24 and the first spring 25, the two movable grippers 23 remain centered and open under the action of the first spring 25 when not subjected to external force from the drive rail (such as during the return trip or a machine stop due to a malfunction). This design ensures that the system will not experience accidental clamping or material rewinding when not in operation, thus possessing inherent safety. Through the transition zone on the drive rail and the rolling and pressing cooperation of the follower roller 26, the high-speed horizontal displacement of the gripper is transformed into a smooth vertical closing action of the movable grippers 23. Compared to the instantaneous impact of electromagnetic attraction, this mechanical structure achieves a gradual loading of clamping force, reducing impact damage to the precision strip.

[0041] In addition, guide frames 11 are symmetrically fixedly connected to both the upper drive rail 9 and the lower drive rail 38, and second guide rods 10 are fixedly connected to both the top and bottom of the support frame 3. The second guide rods 10 pass through the guide frames 11 and are slidably connected to the guide frames 11.

[0042] The specific working process of the clamping and conveying assembly is as follows: Reset and holding stage (located in the disengagement zone 903): When the clamping clamp moves with the endless flexible carrier 20 to the return path below the frame 2, or before entering the straight conveying area, the follower roller 26 is in a state of separation from the upper drive rail 9 and the lower drive rail 38 (i.e., located in the disengagement zone 903). At this time, the first spring 25 sleeved on the slide bar 22 is in a released or pre-compressed state, and its elastic force acts on the inner side of the movable jaw 23, pushing the two movable jaws 23 to move away from the fixed block 24 along the slide bar 22. At this time, the distance between the two movable jaws 23 reaches the maximum, and the clamping clamp is in the open reset state. Mechanical triggering stage (located in the transition zone): When the clamping clamp moves into the linear conveying stroke along with the endless flexible carrier 20, the follower rollers 26 on the upper and lower sides of the clamping clamp simultaneously contact the transition zone (usually a wedge-shaped converging slope) between the upper drive rail 9 and the lower drive rail 38. As the clamping clamp moves forward, the vertical distance between the upper drive rail 9 and the lower drive rail 38 gradually shrinks. The slope of the drive rail forcibly presses the follower rollers 26, forcing the follower rollers 26 to drive the movable jaw 23 to overcome the resistance of the first spring 25 and slide along the slide bar 22 towards the fixed block 24 to perform the clamping action. Locking conveying stage (located in the working area): When the follower roller 26 runs to the working area (straight section) of the upper drive rail 9 and the lower drive rail 38, the rails apply a constant vertical pressure to the follower roller 26, keeping the two movable jaws 23 in the closed position, tightly clamping the edge of the strip between the two movable jaws 23, and realizing mechanical self-locking conveying. Reset zone: After passing through the transition zone behind the conveyor route, it enters the release zone 903, causing the clamps to loosen, and then the above process is repeated.

[0043] The lower drive rail 38 and the upper drive rail 9 have the same structure and are arranged symmetrically, and they work in the same way.

[0044] Example 3 like Figure 3 , Figure 4 and Figure 5As shown, based on Embodiment 2, the present invention provides a technical solution: Preferably, the support frame 3 is provided with a fixed seat 12 and a horizontal slide 7 inside; the fixed seat 12 is fixedly installed on the inner side of the support frame 3, and the horizontal slide 7 is slidably connected to the inner side of the support frame 3 and can move closer to or away from the fixed seat 12 in the horizontal direction; the support frame 3 is provided with a scissor linkage assembly, which includes two cross links 5 that are rotatably connected to each other in the middle; the ends of the two cross links 5 are rotatably connected to adjusting sliders 6; the two adjusting sliders 6 located on one side of the fixed seat 12 are slidably connected to the vertical guide rail 8 of the fixed seat 12, and have only vertical movement freedom; the two adjusting sliders 6 located on one side of the horizontal slide 7 are slidably connected to the vertical guide rail 8 of the horizontal slide 7, and have a composite degree of freedom of moving horizontally with the horizontal slide 7 and moving vertically along the vertical guide rail 8; an electric push rod 14 is fixedly installed inside the support frame 3, and the output end of the electric push rod 14 is fixedly connected to the horizontal slide 7 for driving the horizontal slide 7 to move horizontally.

[0045] This solution utilizes the interaction between the upper drive rail 9, the lower drive rail 38, and the follower roller 26 for clamping. However, considering that the specifications and thickness of the strip vary in different products, adjustments are necessary.

[0046] In this embodiment, the solution utilizes the geometric symmetry of the scissor lift linkage component, combined with the linkage mechanism formed by the hinged connection of the two cross links 5, to ensure that when the mechanism is activated, the upper drive rail 9 and the lower drive rail 38 connected to the adjusting slider 6 on one side of the fixed seat 12 move symmetrically with respect to the central horizontal plane. Therefore, regardless of the change in strip thickness, the neutral layer of the clamped strip remains unchanged, perfectly ensuring the stability of the stamping feeding baseline. In terms of drive, the electric push rod 14 is used as the power source to realize the digital stepless adjustment of the drive rail spacing. The cooperation structure between the fixed seat 12 and the vertical guide rail 8 provides extremely high lateral rigidity, ensuring that the drive rail will not vibrate or shift due to clamping reaction force during high-speed feeding. In addition, the cross link 5 structure in the solution (utilizing the principle of triangular geometric side length change) can convert the horizontal thrust of the electric push rod 14 to provide sufficient driving force for the vertical movement of the drive rail, while having mechanical self-locking or stable support characteristics at a certain angle, ensuring the reliability of the spacing setting.

[0047] Specifically: the upper drive rail 9 and the lower drive rail 38 are respectively fixedly connected to two corresponding adjusting sliders 6 on one side of the fixed base 12. The adjusting sliders 6 are restricted to sliding on the vertical guide rail 8 of the fixed base 12. The electric push rod 14 is in a stopped state. Through the rigid support of the cross link 5, the upper drive rail 9 and the lower drive rail 38 are kept at the set spacing position. When the system receives the instruction to increase the thickness, the electric push rod 14 is activated, and its output end pushes the horizontal slide 7 to move horizontally toward the fixed base 12 (pressing action). Since the middle parts of the two cross links 5 are rotatably connected to each other, and the two ends of the cross links 5 are respectively connected to the side of the fixed base 12 and the horizontal slide. The adjusting slider 6 on side 7 is hinged, so the thrust forces the horizontal span of the two cross links 5 to decrease, which in turn leads to an increase in the vertical span (similar to the opening action of scissors); the swing at the end of the cross link 5 is transmitted to the adjusting slider 6 through the hinge point. Since the adjusting slider 6 is constrained by the vertical guide rail 8, the arc motion component of the cross link 5 is converted into the linear motion of the adjusting slider 6 in the vertical direction; driven by the cross link 5, the adjusting slider 6 above the fixed seat 12 moves upward and the adjusting slider 6 below moves downward, and the moving distances are equal, thereby driving the upper drive rail 9 and the lower drive rail 38 connected to it to move away from each other synchronously with the center line as the reference.

[0048] like Figure 3 and Figure 4 As shown, a further improvement of the technical solution of the present invention is as follows: Preferably, the lower drive rail 38 is rigidly fixed to the lower adjusting slider 6 by bolts, and the upper drive rail 9 is installed on the adjusting slider 6 by an elastic floating assembly; the elastic floating assembly includes a pressure seat 15 fixedly connected to the adjusting slider 6 and a plurality of guide posts 16 passing through the inside of the pressure seat 15, one end of the guide post 16 is fixedly connected to the upper drive rail 9, and the other end is provided with an anti-detachment limiting structure; a disc spring 17 is sleeved on the outside of the guide post 16, and the disc spring 17 abuts against the upper drive rail 9 and the pressure seat 15.

[0049] This solution primarily addresses the problem of excessive constraint during precision stamping feeding caused by fluctuations in strip thickness tolerance or the adhesion of minute foreign objects (such as stamping sludge and iron filings). Specifically, if both the upper drive rail 9 and the lower drive rail 38 are rigidly fixed, when the local thickness of the strip exceeds the set gap, the follower roller 26 will be jammed within the rail, leading to an overload alarm on the feeding motor or damage to the transmission mechanism. Furthermore, if ordinary helical springs are used for floating, due to insufficient rigidity, the upper drive rail 9 is easily lifted by the reaction force during normal feeding and clamping, resulting in unstable clamping force and failing to guarantee high-precision linear conveying. Therefore, a structure is needed that exhibits rigidity during normal operation and flexibility under unexpected overload conditions.

[0050] In this embodiment, an asymmetrical stiffness design with a rigid lower section and a flexible upper section cleverly balances feeding accuracy and mechanism safety. Specifically, the lower drive rail 38 is rigidly fixed with bolts, establishing an unyielding rigid physical benchmark. Regardless of changes in clamping force, the bottom height of the strip remains constant, ensuring that the strip can slide smoothly and unimpeded into the punch die. The upper drive rail 9 is elastically floating with disc springs 17. Utilizing the physical characteristics of disc springs—short stroke, large load, and high stiffness—a preload threshold far exceeding the normal feeding reaction force is set, allowing the upper drive rail 9 to exhibit stability similar to a rigid connection under normal operating conditions. This solves the drawbacks of soft floating with ordinary springs, triggering the elastic function only under extreme overload conditions. Thus, while ensuring micron-level feeding accuracy, it provides reliable overload and collision protection for expensive precision mechanisms.

[0051] During operation, the mechanism automatically switches between rigid and flexible modes based on the stress conditions. Under normal stamping production conditions, when the strip thickness is within the tolerance range, the vertical reaction force generated by the rollers of the clamping clamp pressing the upper drive rail 9 is less than the preset strong preload value of the disc spring 17. At this time, the disc spring assembly remains in its initial compressed state and does not move, pressing the upper drive rail 9 firmly at the limit position. The system exhibits high-rigidity fixed-distance conveying. Once foreign objects adhere to the strip surface or the thickness at the joint suddenly increases, the squeezing force of the rollers on the drive rail instantly surges and exceeds the preload threshold. The huge reaction force forces the disc spring 17 to compress further, and the upper drive rail 9 then floats slightly upward relative to the adjusting slider 6 along the guide post 16, instantly releasing the excessive mechanical stress to allow the abnormal part to pass. When the abnormality is eliminated, the disc spring assembly releases the stored energy and quickly pushes the upper drive rail 9 back to its original lower limit working position, and the system immediately resumes normal feeding.

[0052] like Figure 4 As shown, preferably, displacement sensors 39 are fixedly installed at symmetrical positions at the bottom of the upper pressure seat 15; a signal reflection reference surface 18 is provided on the top surface of the upper drive rail 9 corresponding to the position of the displacement sensor 39; the displacement sensor 39 is electrically connected to the external control system, and the displacement sensor 39 is configured to collect the floating values ​​of four monitoring points; by comparing the value difference of the two sensors on the same side, it is determined whether the upper drive rail 9 has tilted; by comparing the value difference of the sensors at corresponding positions on the left and right sides, it is determined whether the strip conveying has lateral load imbalance or unilateral breakage.

[0053] In this embodiment, by constructing a four-point sensing matrix of "left front, left rear, right front, and right rear," the guide fixture is endowed with the ability to perceive and intelligently diagnose the spatial attitude of the upper drive rail 9 in real time. Specifically, the system utilizes differential data from the front and rear sensors on the same side to accurately monitor the pitch parallelism of the upper drive rail 9, thereby identifying faults at specific locations such as blockage at the feed inlet (in a head-up posture) or accumulation at the discharge outlet (in a head-down posture). At the same time, by utilizing differential data from the corresponding position sensors on the left and right sides, the system can monitor the lateral balance of the strip conveyor, effectively identifying asymmetric faults such as material breakage, slippage, or deviation on one side. This not only achieves accurate fault location but also effectively filters out common-mode interference caused by overall equipment vibration through differential algorithms, greatly improving the monitoring reliability and safety in high-speed stamping environments.

[0054] During the stamping and feeding operation, four displacement sensors 39 fixed at the bottom of the pressure seat 15 transmit signals to the reflective reference surface on the top surface of the drive rail in real time to monitor the real-time distance change of the upper drive rail 9 relative to the pressure seat 15. When qualified strip is being conveyed normally, the upper drive rails 9 on both sides are subjected to uniform force and float smoothly as a whole. The floating values ​​collected by the four monitoring points are basically consistent, and the system determines that it is operating normally. When waste material folds or foreign objects get stuck at the feeding end, the front end of the upper drive rail 9 is forced to rise due to compression, while the rear end remains in a low position. This causes the sensor values ​​on the front side to be significantly greater than those on the rear side. The system identifies that the drive rail is in a "head-up" tilted state, determines that the feeding is blocked, and stops the machine. When the strip breaks on one side or deviates severely, the intact drive rail on one side remains in a floating state, while the broken drive rail falls back due to loss of support. This causes a huge deviation in the sensor values ​​on both sides. The system identifies a "lateral load" state, determines that the feeding is abnormal, and triggers an alarm.

[0055] Example 4 like Figure 6 , Figure 7 and Figure 9 As shown, based on Embodiment 2, the present invention provides a technical solution: Preferably, piston cylinders 27 are fixedly connected to both the top and bottom of the fixing block 24, piston plates 28 are slidably connected between the inner walls of the piston cylinders 27, a support rod 29 is fixedly connected to the top of the piston plate 28, and the end of the support rod 29 away from the piston plate 28 is fixedly connected to the movable gripper 23. An air inlet pipe 31 and an air outlet pipe 30 are provided on the piston cylinder 27, and a one-way valve is provided inside both the air inlet pipe 31 and the air outlet pipe 30; the airflow rate of the air inlet pipe 31 is less than the airflow rate of the air outlet pipe 30.

[0056] This solution primarily addresses the rebound impact and dynamic oscillation issues that occur during the reset process of the upper drive rail 9 under a high-rigidity disc spring preload structure. Due to the extremely high stiffness and rebound response speed of the disc spring 17, when the follower roller 26 leaves the drive rail's working area, or when the drive rail needs to return to its initial position after being compressed, the enormous elastic potential energy released by the disc spring will drive the upper drive rail 9 to collide with the mechanical limiting structure at extremely high acceleration. This repeated rigid impact will not only accelerate the fatigue wear of the guide rail limiting components, but will also cause the drive rail to generate slight high-frequency oscillations at the moment of reset, affecting the initial stability of subsequent feeding cycles.

[0057] In this embodiment, a unidirectional damping buffer system is constructed using a pneumatic piston structure, achieving the asymmetric motion characteristics of fast retraction and slow resetting of the drive rail. Specifically, by setting the flow rate of the inlet pipe 31 to be less than that of the outlet pipe 30, the difference in airflow resistance within the piston cavity is precisely controlled. When the roller squeezes the guide rail (piston compression stroke), the large-flow air outlet opens and the gas is quickly discharged, ensuring that the cylinder does not generate significant resistance, ensuring the sensitive response of the drive rail to the roller squeezing action, and avoiding hard wear between the roller and the guide rail due to air resistance. When the guide rail is reset under the action of the disc spring (piston return stroke), the small flow rate of the air inlet limits the air backfill speed, forming negative pressure damping in the cylinder. This air suction cup effect significantly reduces the rebound speed of the guide rail, allowing it to smoothly and softly land at the limit point, effectively eliminating mechanical impact noise and suppressing the residual vibration and shaking after the guide rail is reset.

[0058] During operation: When the follower roller 26 of the clamping clamp enters the area of ​​the upper drive rail 9, forcing the upper drive rail 9 to float upward against the disc spring force, it drives the piston plate 28 to move in the piston cylinder 27, compressing the cavity volume. At this time, the one-way valve in the air outlet pipe 30 opens under positive pressure. Due to its large airflow, the air in the cylinder is instantly discharged, and the piston movement is almost unresisted, ensuring that the guide rail can smoothly adapt to the roller movement. When the roller leaves or the squeezing force disappears, the disc spring 17 pushes the upper drive rail 9 to return to its original position downward. The piston plate 28 moves in the opposite direction, and the cavity volume increases. At this time, the one-way valve of the air outlet pipe 30 closes, and the one-way valve of the air inlet pipe 31 opens. Since the airflow of the air inlet pipe 31 is designed to be small (throttling state), the external air cannot quickly fill the cylinder, resulting in a vacuum negative pressure inside the cylinder. This negative pressure generates a reverse suction force (i.e., damping) on ​​the piston plate 28, which counteracts the violent rebound force of the disc spring, thereby forcing the upper drive rail 9 to fall back smoothly at a slower speed until it is fully reset.

[0059] Example 5 like Figure 2 , Figure 3 and Figure 4As shown, based on Embodiment 3, the present invention provides a technical solution: Preferably, mounting plates 32 are fixedly connected to the sidewalls of the upper drive rail 9 and the lower drive rail 38 near the discharge side. A vertical rod 33 is interspersed between the two mounting plates 32 located on the same vertical line. Limiting blocks 34 are fixedly connected to both ends of the vertical rod 33. A second spring 35 is sleeved on the outside of the vertical rod 33 and between the limiting block 34 and the mounting plate 32. The two ends of the second spring 35 abut against the limiting block 34 and the mounting plate 32 respectively. A guide platform 36 is fixedly connected to the middle of the vertical rod 33. The side of the guide platform 36 near the incoming material has an arc surface structure that is larger at the top and smaller at the bottom. The vertical rod 33 is a spline rod.

[0060] The surface of the stamping scrap skeleton is usually covered with high-viscosity stamping oil, and the disordered movement of the strip after it is unrestrained can easily cause the scrap to remain adsorbed or stuck on the clamping clamp by the surface tension of the oil after the clamping force is removed, making it impossible to detach.

[0061] In this embodiment, the guide platform 36 is set on the arc-shaped guide surface on the discharge path. For waste materials that are adhered to or stuck on the clamping clamp, the guide platform 36 acts as a scraper, forcibly breaking the oil film adhesion and peeling it off. At the same time, the arc-shaped geometric feature of the upper part being wider than the lower part naturally converts the horizontal kinetic energy of the waste material into downward sliding kinetic energy, ensuring that the waste material falls accurately into the waste box or conveyor belt below.

[0062] The design utilizes an elastic suspension support system consisting of vertical rod 33 and second spring 35 to give the guide platform 36 the ability to avoid force. In extreme situations (such as severe curling, overlapping of waste materials, or impact of foreign objects on the guide platform 36), the huge impact force forces the buffer spring to compress, allowing the guide platform 36 to retreat vertically or with slight sway, thus avoiding mechanical breakage caused by rigid impact. At the same time, the rebound vibration of the spring helps to shake off the waste materials hanging on the platform, thereby assisting in material removal. Furthermore, this design also takes into account that the upper drive rail 9 and lower drive rail 38 themselves need to be adjusted relative to each other in the vertical direction. This design allows the mounting plate 32 to be in a floating state, thereby providing the mounting plate 32 with room for movement.

[0063] like Figure 2 As shown, in this embodiment, preferably, a plurality of guide ribs 37 are arranged at intervals along the vertical direction on the arc-shaped guide surface of the guide platform 36; the guide ribs 37 protrude from the surface of the arc-shaped guide surface, and their extension direction is consistent with the sliding trajectory direction of the waste material; the cross-sectional structure of the guide ribs 37 is semi-circular, triangular or trapezoidal, used to change the contact form between the waste material and the arc-shaped guide surface from surface contact to line contact.

[0064] In this embodiment, by setting a raised guide rib 37 on the arc surface, the waste material is forced to contact only the top of the rib, so that the waste material body and the base surface of the guide platform 36 are artificially suspended, forming an air flow gap. This structure completely destroys the continuity of the oil film, eliminates the conditions for vacuum adsorption, and ensures that the waste material will not be adsorbed on the guide platform 36. Secondly, by using the guide rib 37, the contact form is changed from a large area surface contact to several narrow line contacts, which significantly reduces the friction contact area. Under the action of gravity, the frictional resistance of the waste material sliding down along the guide rib 37 is greatly reduced, and even thin and soft materials can be smoothly detached.

[0065] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A punching guide and positioning fixture for a punch press, comprising a punch press body (1); characterized in that, Also includes: The frame (2) extends along the strip feeding path, crossing from the feeding side of the punching area to the discharge side; The top of the frame (2) is provided with adjustable support frames (3) on both sides. The clamping and conveying assembly is symmetrically installed on the frame (2) and is used to clamp the two sides of the strip width and drive the strip to be conveyed in a straight line. The clamping and conveying assembly includes: The circulating drive unit is installed on the support frame (3) and includes a drive wheel, a driven wheel and an endless flexible carrier (20) wrapped around it. The clamping array includes a plurality of clamping clamps spaced apart along the running direction of the endless flexible carrier (20); A clamping control unit is disposed on the running path of the endless flexible carrier (20); the clamping clamp runs unidirectionally with the endless flexible carrier (20); the clamping control unit is configured to: drive the clamping clamp to switch to a closed clamping state when the clamping clamp runs into a preset linear conveying area to maintain linear contact clamping of the strip edge; drive the clamping clamp to switch to a reset and release state when the clamping clamp runs away from the linear conveying area.

2. The punching guide and positioning fixture for a punch press according to claim 1, characterized in that: The clamping clamp includes a clamping seat (21) fixedly connected to an endless flexible carrier (20). A slide rod (22) is fixedly connected inside the clamping seat (21). Movable grippers (23) are symmetrically slidably connected to the outside of the slide rod (22). A fixing block (24) is fixedly connected to the middle of the inner cavity of the clamping seat (21). A first spring (25) is sleeved on the outside of the slide rod (22) and between the movable grippers (23) and the fixing block (24). The first spring (25) is used to provide a mechanism for the two movable grippers to move. (23) The opening forces that are far apart from each other; each of the movable grippers (23) is rotatably connected to a follower roller (26) on the side away from the gripping surface; in conjunction with the gripping clamp, the gripping control unit includes an upper drive rail (9) and a lower drive rail (38) set on the support frame (3); the upper drive rail (9) and the lower drive rail (38) are symmetrically distributed in the vertical direction, and their structures include a flat action area (901) located in the middle, a disengagement area (903) located at both ends, and a wedge-shaped transition area (902) for connecting the two areas.

3. A punching guide and positioning fixture for a punch press according to claim 2, characterized in that: The support frame (3) is provided with a fixed seat (12) and a horizontal slide (7) inside; the fixed seat (12) is fixedly installed on the inner side of the support frame (3), and the horizontal slide (7) is slidably connected to the inner side of the support frame (3) and can move closer to or away from the fixed seat (12) in the horizontal direction; the support frame (3) is provided with a scissor linkage assembly inside, the scissor linkage assembly includes two cross links (5) that are rotatably connected to each other in the middle; the ends of the two cross links (5) are rotatably connected to adjusting sliders (6); two adjusting sliders (6) are located on one side of the fixed seat (12). The section slider (6) is slidably connected to the vertical guide rail (8) of the fixed seat (12), and has only the vertical direction of movement freedom; the two adjusting sliders (6) located on one side of the horizontal slide (7) are slidably connected to the vertical guide rail (8) of the horizontal slide (7), and have a composite degree of freedom of moving horizontally with the horizontal slide (7) and moving vertically along the vertical guide rail (8); an electric push rod (14) is fixedly installed inside the support frame (3), and the output end of the electric push rod (14) is fixedly connected to the horizontal slide (7) for driving the horizontal slide (7) to move horizontally.

4. A punching guide and positioning fixture for a punch press according to claim 3, characterized in that: The lower drive rail (38) is rigidly fixed to the lower adjusting slider (6) by bolts, and the upper drive rail (9) is installed on the adjusting slider (6) by an elastic floating assembly. The elastic floating assembly includes a pressure seat (15) fixedly connected to the adjusting slider (6) and several guide posts (16) passing through the inside of the pressure seat (15). One end of the guide post (16) is fixedly connected to the upper drive rail (9), and the other end is provided with an anti-detachment limiting structure. A disc spring (17) is sleeved on the outside of the guide post (16), and the disc spring (17) abuts against the upper drive rail (9) and the pressure seat (15).

5. A punching guide and positioning fixture for a punch press according to claim 2, characterized in that: The top and bottom of the fixed block (24) are fixedly connected to piston cylinders (27), and piston plates (28) are slidably connected between the inner walls of the piston cylinders (27). A support rod (29) is fixedly connected to the top of the piston plate (28), and the end of the support rod (29) away from the piston plate (28) is fixedly connected to the movable gripper (23). An air inlet pipe (31) and an air outlet pipe (30) are provided on the piston cylinder (27). A one-way valve is provided inside the air inlet pipe (31) and the air outlet pipe (30). The air flow rate of the air inlet pipe (31) is less than that of the air outlet pipe (30).

6. A punching guide and positioning fixture for a punch press according to claim 4, characterized in that: Mounting plates (32) are fixedly connected to the sidewalls of the upper drive rail (9) and the lower drive rail (38) near the discharge side. A vertical rod (33) is interspersed between the two mounting plates (32) located on the same vertical line. Limiting blocks (34) are fixedly connected to both ends of the vertical rod (33). A second spring (35) is sleeved on the outside of the vertical rod (33) and between the limiting block (34) and the mounting plate (32). The two ends of the second spring (35) abut against the limiting block (34) and the mounting plate (32) respectively. A guide platform (36) is fixedly connected to the middle of the vertical rod (33). The guide platform (36) has an arc surface structure that is larger at the top and smaller at the bottom on the side near the incoming material. The vertical rod (33) is a spline rod.

7. A punching guide and positioning fixture for a punch press according to claim 6, characterized in that: The guide platform (36) has several guide ribs (37) spaced vertically on its arc-shaped guide surface; the guide ribs (37) protrude from the surface of the arc-shaped guide surface and extend in the same direction as the sliding trajectory of the waste material; the cross-sectional structure of the guide ribs (37) is semi-circular, triangular or trapezoidal, used to change the contact form between the waste material and the arc-shaped guide surface from surface contact to line contact.

8. A punching guide and positioning fixture for a punch press according to claim 4, characterized in that: Displacement sensors (39) are fixedly installed at symmetrical positions at the bottom of the upper pressure seat (15); a signal reflection reference surface (18) is provided on the top surface of the upper drive rail (9) corresponding to the position of the displacement sensor (39); the displacement sensor (39) is electrically connected to the external control system.

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