A positioning and punching equipment for automotive leaf springs

Abstract

This invention relates to the technical field of automotive leaf spring material positioning and punching equipment, and discloses an automotive leaf spring material positioning and punching equipment, including a conveyor frame, a feeding frame, a support frame, a multi-stage telescopic hydraulic cylinder, a punching head, a positioning component, a cooling component, a waste chip cleaning component, and a PLC control system. It achieves fully automated and collaborative control of the entire process, with each module working independently yet interconnected to form a complete closed-loop operation system. This overcomes the limitations of existing technologies that rely on single-function improvements and piecemeal modifications. With a core inventive concept of full-process closed-loop collaborative prevention and control, it constructs an integrated operation system encompassing conveyor benchmark assurance, graded sequential positioning, dynamic thermal expansion compensation, closed-loop precise cooling of the punching head, and synchronous waste chip removal and safe collection during punching. It solves the problem of accuracy attenuation under high-temperature conditions through closed-loop control and addresses the mutual interference between processes through integrated design, achieving high-precision, long-life, high-safety, and continuous production of automotive leaf spring punching.

Description

Technical Field

[0001] This invention relates to the technical field of positioning and punching equipment for automotive leaf springs, and particularly to a positioning and punching equipment for automotive leaf springs. Background Technology

[0002] Leaf springs generally refer to leaf springs, which are springs made of at least one sheet of spring steel stacked together. Leaf springs are commonly used in wheeled vehicle suspensions and were originally called laminated or bracket springs, sometimes referred to as semi-elliptical springs or handcart springs. During the processing of leaf springs, it is often necessary to punch holes in the sheet material at high temperatures for subsequent assembly and fixation after the leaf spring is formed. In the production process of leaf springs, the punching of the sheet material is generally carried out at high temperatures, so the positioning is often not accurate during punching, and the waste generated during punching cannot be treated, which makes the waste affect the punching.

[0003] In a positioning and punching device for automotive leaf springs with application number CN202310934777.4, the feeding assembly includes a track housing fixedly installed on an outer plate assembly. A sliding rod is installed on the track housing, and a sliding seat is movably installed on the sliding rod. The sliding seat is installed on the outer plate assembly. Through the cooperation of the clamping assembly and the transfer assembly, the sheet metal is accurately positioned and clamped, and the sheet metal is continuously loaded and unloaded through the transfer assembly.

[0004] However, in actual use, during the high-temperature punching process of automotive leaf springs, the sheet metal undergoes thermal deformation due to the high temperature, resulting in thermal expansion and displacement, which leads to deviations in the positioning holes. Moreover, existing technologies mostly use fixed rigid positioning, which cannot compensate for the thermal expansion and deformation of the sheet metal during high-temperature punching. The positioning accuracy can only reach ±0.2mm or more, which easily leads to fatal defects such as hole position misalignment and coaxiality deviation. With the use of stamping dies, especially under high temperature conditions, the metal of the sheet metal and the die cutting edge melts and adheres, increasing the frictional resistance during the punching process, resulting in more punching burrs and increasing the punching defect rate.

[0005] Therefore, this invention proposes a positioning and punching device for automotive leaf spring sheet to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a positioning and punching device for automotive leaf spring sheets to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a positioning and punching device for automotive leaf spring sheet material, comprising a conveyor frame, a feeding frame on the outside of the conveyor frame, a support frame correspondingly mounted above the conveyor frame, a hydraulic cylinder mounted on the support frame, a punching head mounted on the output end of the hydraulic cylinder, a positioning component mounted on the outside of the output end of the hydraulic cylinder, the positioning component comprising two sets of fixing plates, guide rails fixedly connected to the outer ends of the two sets of fixing plates, a positioning rod slidably mounted on the outer side of each set of guide rails, and an electric sliding plate slidably mounted on the front and rear side walls of each set of guide rails, a clamping plate fixed at the end of each set of electric sliding plates, a positioning plate fixed on the inner side wall of the clamping plate, and a laser displacement sensor fixed on the bottom outer side of each set of electric sliding plates; The top of the support frame is equipped with a cooling assembly, which includes a cooling water tank and a cooling pipe sleeve fixedly fitted on the outer wall of the stamping head. The cooling pipe sleeve is equipped with an inlet pipe and an outlet pipe. A water pump is mounted on the cooling water tank. The output end of the water pump is connected to the inlet pipe, and the other end of the outlet pipe is connected to the cooling water tank.

[0008] Preferably, the top of the conveyor frame is provided with a punching platform that corresponds directly to the punching head, and the top of the conveyor frame is provided with conveying rollers at intervals.

[0009] Preferably, the unloading rack includes a guide rack perpendicular to the conveyor rack, the top of the guide rack is equipped with guide rollers, a support platform is provided between two adjacent sets of guide racks, and an unloading plate flush with the top of the conveyor rollers is welded to the side of the guide rack near the conveyor rack.

[0010] Preferably, the support frame includes a fixed frame, a supporting steel beam is fixed to the bottom of the fixed frame, the hydraulic cylinder is fixed to the fixed frame, and the hydraulic cylinder is a multi-stage telescopic cylinder.

[0011] Preferably, the positioning assembly further includes a fixing ring, which is fixed to the outside of the second-to-last output cylinder on the hydraulic cylinder. Two sets of fixing plates are symmetrically installed on the left and right sides of the fixing ring. A slide rail matching the positioning rod is provided on the outer side wall of the guide rail, and the positioning rod is installed in the slide rail by an electric slider. Slide grooves matching the electric sliding plate are provided on the front and rear side walls of the guide rail, and a positioning stop is fixed on the positioning rod.

[0012] Preferably, the cooling sleeve is fixedly installed at the end of the last stage output cylinder of the hydraulic cylinder, and the punch head is fixedly installed inside the cooling sleeve. A spiral water guiding channel is opened inside the cooling sleeve, and a temperature sensor is installed on the cooling sleeve.

[0013] Preferably, the waste cleaning assembly is fixedly installed on the punching table, which has a discharge hole corresponding to the punching head. A base is fixed above the discharge hole, and a rotating seat is rotatably mounted on the top of the base. A gear ring is mounted on the top of the rotating seat, and a buffer groove is evenly opened along the circumferential direction at the bottom of the gear ring. A guide cylinder extending into the buffer groove is fixed on the top of the rotating seat, and a support spring is fixed inside the guide cylinder. The top of the support spring is fixed to the top of the inner cavity of the buffer groove. A drive motor is fixed on the top of the punching table, and a gear meshing with the gear ring is fixed at the output end of the drive motor. Scrapers are evenly fixed along the circumferential direction on the inner sidewall of the gear ring.

[0014] Preferably, the top of the scraper is passivated and is slightly higher than the top of the conveyor roller, while the top of the gear is lower than the top of the conveyor roller.

[0015] Preferably, the waste cleaning assembly further includes a material collection hood disposed at the bottom of the punching platform, the bottom of the material collection hood is connected to a chip collection pipe, the bottom end of the chip collection pipe is connected to a material collection box, and a negative pressure fan is fixedly installed inside the material collection box, and an arc-shaped guide plate is disposed on the inner side wall of the material collection hood.

[0016] The technical effects and advantages of this invention are as follows: This invention addresses the specific scenario of high-temperature punching in automotive leaf springs, overcoming the limitations of existing technologies that rely on isolated improvements and fragmented approaches. With a core concept of closed-loop collaborative control throughout the entire process, it constructs an integrated operational system encompassing guaranteed conveying standards, tiered sequential positioning, dynamic thermal expansion compensation, closed-loop precise cooling of the punching head, and simultaneous safe collection of chips during punching. This invention is not a simple optimization of existing single structures, but rather addresses the industry-specific characteristic of automotive leaf springs being prone to thermal deformation during high-temperature punching by organically coordinating technological improvements across five major processes: conveying, positioning, punching, cooling, and chip removal. It resolves process sequence conflicts at the mechanical structural level, addresses precision degradation under high-temperature conditions through closed-loop control, and resolves mutual interference between processes through integrated design. Ultimately, it simultaneously overcomes four core industry pain points that have long plagued existing equipment, achieving high-precision, long-life, high-safety, and continuous production of automotive leaf springs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the support frame, positioning component, and cooling component of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the conveyor, unloading rack, and waste cleaning component of the present invention; Figure 4 This is a schematic diagram of a partial assembly structure of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the positioning component and the cooling component of the present invention; Figure 6 This is a schematic diagram of the waste cleaning component structure of the present invention; Figure 7 This is a cross-sectional view of the waste cleaning component of the present invention.

[0018] In the diagram: 10. Conveyor frame; 11. Punching table; 12. Conveyor roller; 20. Unloading frame; 21. Guide frame; 22. Support platform; 30. Support frame; 31. Fixing frame; 32. Supporting steel beam; 33. Hydraulic cylinder; 34. Punching head; 40. Positioning assembly; 41. Fixing plate; 42. Guide rail; 43. Positioning rod; 44. Electric sliding plate; 45. Clamping plate; 46. Positioning plate; 50. Cooling assembly; 51. Cooling water tank; 52. Water pump; 53. Inlet pipe; 54. Outlet pipe; 55. Cooling sleeve; 60. Waste chip cleaning assembly; 61. Base; 62. Rotating seat; 63. Gear ring; 64. Guide cylinder; 65. Support spring; 66. Scraper; 67. Drive motor; 68. Gear; 69. Collection hood; 610. Chip collection pipe; 611. Collection box. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 7As shown, this embodiment discloses a positioning and punching equipment for automotive leaf springs, including a conveyor frame 10, a feeding rack 20 on the outside of the conveyor frame 10, a support frame 30 correspondingly mounted above the conveyor frame 10, a hydraulic cylinder 33 mounted on the support frame 30, a punching head 34 mounted on the output end of the hydraulic cylinder 33, and a positioning component 40 mounted on the outside of the output end of the hydraulic cylinder 33. The positioning component 40 includes two sets of fixing plates 41, and guide rails 42 are fixedly connected to the outer ends of the two sets of fixing plates 41. A positioning rod 43 is slidably mounted on the outer side of each set of guide rails 42, and an electric sliding plate 44 is slidably mounted on the front and rear side walls of each set of guide rails 42. A clamping plate 45 is fixed to the end of each set of electric sliding plates 44, and a positioning plate 46 is fixed to the inner side wall of the clamping plate 45. A laser displacement sensor is fixed to the bottom outer side of each set of electric sliding plates 44. All the above components are electrically connected to the PLC control system of the equipment. The system achieves fully automated and collaborative control throughout the entire process. During actual operation, the conveyor frame 10 and the unloading frame 20 ensure stable horizontal transport of the long strip leaf spring sheet. The positioning component 40 enables pre-positioning of the sheet and dynamic compensation for thermal expansion. The cooling component 50 achieves real-time closed-loop cooling of the punching head 34. The waste cleaning component 60 enables synchronous cleaning and safe collection of punching waste. All components are coordinated and linked throughout the entire process through the PLC control system, forming a fully closed-loop operation system of conveying, positioning, punching, cooling, and waste cleaning. At the same time, it solves the four core technical problems of existing automotive leaf spring punching equipment: insufficient positioning accuracy, inability to compensate for thermal expansion, short life of punching head, and incomplete waste cleaning. It significantly improves the product qualification rate and production efficiency of automotive leaf spring punching, reduces production and maintenance costs, and is fully adapted to the needs of large-scale and continuous industrial production of automotive leaf springs.

[0021] The conveyor frame 10 is an integral steel structure frame that extends along the sheet material conveying direction. The top of the conveyor frame 10 is provided with a punching table 11 that corresponds to the punching head 34. Conveying rollers 12 are spaced apart on the top of the conveyor frame 10. The axial direction of the conveying rollers 12 is horizontally arranged along the width direction of the sheet material to provide low-resistance rolling support for the long strip leaf spring sheet material to be processed, and to avoid surface scratches during the sheet material conveying process.

[0022] Please see Figure 1 and Figure 3 The unloading rack 20 includes a guide rack 21 that is vertically corresponding to the conveyor rack 10. The top of the guide rack 21 is equipped with a guide roller. A support platform 22 is provided between two adjacent sets of guide racks 21. The side of the guide rack 21 closest to the conveyor rack 10 is welded with an unloading plate that is flush with the top of the conveyor roller 12.

[0023] The long strip of automotive leaf spring material to be processed is placed on the conveyor roller 12 and moved along the material conveying direction by an external traction mechanism. It is continuously conveyed by the conveyor roller 12 to the punching station of the punching table 11 for processing. Considering the processing characteristics of the long and heavy automotive leaf spring material, the guide frame 21 supports the material and avoids the sagging deformation caused by the weight of the long strip material. It ensures the levelness of the material during the conveying process from the source and provides a consistent reference surface for subsequent positioning and punching. The flush transition design of the blanking plate eliminates the problem of jamming and warping at the end of the material at the conveying junction, ensuring the continuity and stability of the material conveying and adapting to the needs of large-scale continuous production of automotive leaf springs.

[0024] The support frame 30 includes a fixed frame 31, with a supporting steel beam 32 fixed at the bottom of the fixed frame 31. The hydraulic cylinder 33 is fixed on the fixed frame 31 and is a multi-stage telescopic cylinder, which can achieve staged telescopic movement. While ensuring sufficient punching stroke, the overall installation height of the hydraulic cylinder 33 is greatly reduced, which is suitable for the spatial layout of the automotive leaf spring production line. At the same time, it provides a structural basis for the staged action of the positioning component 40 and the punching head 34. The design of the multi-stage telescopic cylinder not only meets the large stroke punching requirements of the thick automotive leaf spring sheet, but also realizes the separation of the timing of the positioning action and the punching action through the staged telescopic structure. Structurally, it ensures the operation logic of positioning first and then punching, and eliminates the hole position displacement defect caused by the sheet material movement during the punching process.

[0025] Please see Figure 4 and Figure 5 The positioning component 40 also includes a fixing ring, which is fixed on the outside of the penultimate output cylinder of the hydraulic cylinder 33. Two sets of fixing plates 41 are symmetrically installed on the left and right sides of the fixing ring. The outer side wall of the guide rail 42 is provided with a slide rail that matches the positioning rod 43, and the positioning rod is installed in the slide rail by an electric slider. The front and rear side walls of the guide rail 42 are provided with slide grooves that match the electric slide plate 44, and a positioning stop is fixed on the positioning rod 43.

[0026] In actual operation, when the hydraulic cylinder 33 moves downward to perform the punching operation, because the fixing ring is installed on the penultimate output cylinder of the hydraulic cylinder 33, the multi-stage output end of the hydraulic cylinder 33 extends in stages. The penultimate output cylinder first drives the positioning assembly 40 to move downward as a whole, so that the positioning stop on the positioning rod 43 reaches the end of the sheet metal first, achieving pre-positioning. At this time, the PLC control system controls the electric slider to drive the positioning rod 43 to move, so that the positioning rod 43 contacts the end of the sheet metal to complete the clamping and positioning. At the same time, it controls the two sets of electric sliding plates 44 to move the clamping plate 45 and the positioning plate 46 along the slide groove to move towards the front and rear sides of the sheet metal until the positioning plate 46 is tightly attached to the side of the sheet metal, completing the side clamping and positioning of the sheet metal. Simultaneously, the positioning stop of the positioning rod 43 abuts against the feed end of the sheet metal, completing the axial reference positioning of the sheet metal. During the process, the laser displacement sensor at the bottom of the electric sliding plate 44 collects the actual displacement data of the side of the sheet metal in real time, and detects the thermal expansion of the sheet metal under high temperature punching conditions in real time, and feeds the detection data back to the PLC control system. The system adjusts the stroke of the electric slide plate 44 in real time according to the thermal expansion to compensate for the positioning deviation caused by thermal expansion. After positioning, the last stage output cylinder of the hydraulic cylinder 33 drives the punch head 34 downward to complete the punching operation. This method can overcome the technical limitations of the existing fixed rigid positioning that cannot adapt to the thermal expansion deviation of the sheet metal. By installing the positioning component 40 on the penultimate stage output cylinder of the hydraulic cylinder 33, the operation sequence of positioning before punching is realized structurally, avoiding the sheet metal from moving during the punching process. At the same time, the axial reference positioning of the positioning rod 43 and the side clamping positioning of the clamping plate 45 form a two-way positioning constraint. With the real-time thermal expansion detection of the laser displacement sensor, the positioning coordinates are dynamically corrected, which greatly improves the positioning accuracy of high-temperature punching of automotive leaf springs and avoids quality defects such as hole position deviation and coaxiality deviation. In addition, the adjustable design of the electric slider and the electric slide plate 44 can be adapted to automotive leaf springs of different widths and lengths, improving the versatility and adaptability of the equipment.

[0027] In existing technologies, to ensure that the sheet metal does not shift during punching, the conventional improvement approach for those skilled in the art is to add an independent positioning drive mechanism. This involves first using an independent cylinder to drive the positioning mechanism to clamp the sheet metal, and then driving the stamping hydraulic cylinder to complete the punching. This solution requires two independent drive systems and a complex timing control program, resulting in a complex structure, high manufacturing costs, and difficulty in ensuring the synchronization of the two drive systems, making timing deviations highly likely. However, this invention innovatively utilizes the graded telescopic characteristics of a multi-stage telescopic cylinder, mounting the positioning component and the punching head on different stages of the output cylinder. Without the need for any additional independent drive mechanism, the absolute timing control of the positioning component moving downwards to its designated position and the punching head moving downwards to punch—achieved naturally through the graded action of a single hydraulic cylinder—fundamentally eliminates timing deviations. Simultaneously, it significantly simplifies the equipment structure and reduces control difficulty and manufacturing costs. The prior art has never provided a technical inspiration for using different output cylinders of a multi-stage telescopic cylinder to install positioning components and stamping heads to achieve mechanical timing control of positioning and stamping. At the same time, it solves the two related problems of sheet metal movement and thermal expansion deviation, and breaks through the positioning limitations of the prior art. This embodiment breaks through the conventional design thinking of those skilled in the art and is not obvious to those skilled in the art, and has outstanding substantive features.

[0028] Please see Figure 2 and Figure 5 The top of the support frame 30 is equipped with a cooling assembly 50, which includes a cooling water tank 51 and a cooling tube sleeve 55 fixedly sleeved on the outer wall of the punch head 34. The cooling tube sleeve 55 is equipped with an inlet pipe 53 and an outlet pipe 54. The cooling water tank 51 is equipped with a water pump 52. The output end of the water pump 52 is connected to the inlet pipe 53, and the other end of the outlet pipe 54 is connected to the cooling water tank 51. The cooling tube sleeve 55 is fixedly installed at the end of the last stage output cylinder of the hydraulic cylinder 33, and the punch head 34 is fixedly installed inside the cooling tube sleeve 55. A spiral water guiding channel is opened inside the cooling tube sleeve 55, and a temperature sensor is installed on the cooling tube sleeve 55.

[0029] The temperature sensor's detection end is attached to the inner wall of the cooling sleeve 55 to detect the actual working temperature of the cooling sleeve 55 and the punching head 34 in real time. Both the temperature sensor and the water pump 52 are bidirectionally electrically connected to the PLC control system. Throughout the punching process, the PLC control system continuously starts the water pump 52, pumping the cooling medium from the cooling water tank 51 into the spiral water channel of the cooling sleeve 55 via the inlet pipe 53. As the cooling medium flows along the spiral water channel, it undergoes thorough heat exchange with the outer wall of the punching head 34, absorbing the heat generated by the punching head 34's continuous contact with the high-temperature sheet metal. After heat exchange, the cooling medium flows back to the cooling water tank 51 via the outlet pipe 54 for cooling, completing the circulating cooling process. During this process, the temperature sensor detects the temperature data of the cooling sleeve 55 in real time and feeds it back to the PLC control system. When the detected temperature exceeds a preset threshold, the PLC control system automatically increases the output power of the water pump 52, increases the flow rate of the cooling medium, enhances the cooling effect, and ensures the cooling of the punching head 34. The operating temperature is consistently controlled within a reasonable range below 200℃. Addressing the core pain points of softening of the cutting edge, thermal fatigue wear, and short service life caused by the continuous contact of the stamping head 34 with 800-1000℃ high-temperature sheet metal during high-temperature punching of automotive leaf springs, the design of the enclosed cooling sleeve 55 ensures full circumferential contact between the cooling medium and the main body of the stamping head 34. The spiral water guide channel significantly extends the flow path and heat exchange time of the cooling medium, significantly improving heat exchange efficiency and achieving real-time, precise cooling of the stamping head 34. This fundamentally avoids thermal fatigue wear and cutting edge deformation caused by high temperatures, extending the service life of the stamping head 34 by more than double. Simultaneously, closed-loop feedback control via a temperature sensor enables dynamic adjustment of the cooling effect, ensuring the stability of the cooling effect at different punching frequencies. This eliminates quality defects such as punching burrs and sheet metal adhesion caused by excessively high stamping head 34 temperatures, eliminating the need for frequent machine shutdowns to change molds and improving continuous production efficiency.

[0030] Please see Figure 3 , Figure 4 , Figure 6 and Figure 7The waste cleaning component 60 is fixedly installed on the punching table 11. The punching table 11 has a discharge hole corresponding to the punching head 34. A base 61 is fixed above the discharge hole. A rotating seat 62 is rotatably mounted on the top of the base 61. A gear ring 63 is mounted on the top of the rotating seat 62. Buffer grooves are evenly distributed along the circumference at the bottom of the gear ring 63. A guide cylinder 64 extending into the buffer groove is fixed on the top of the rotating seat 62. A support spring 65 is fixed inside the guide cylinder 64. The top of the support spring 65 is fixed to the top of the inner cavity of the buffer groove. A drive motor 67 is fixed on the top of the punching table 11. The output end of the drive motor 67 is fixed with the gear ring 63. The gear 68 is meshed with a tooth ring 63. Scrapers 66 are evenly fixed on the inner side wall of the gear ring 63 along the circumferential direction. The top of the scraper 66 is blunted and slightly higher than the top of the conveyor roller 12. The top of the gear 68 is lower than the top of the conveyor roller 12. The waste cleaning assembly 60 also includes a material collection hood 69 set at the bottom of the punching table 11. The bottom of the material collection hood 69 is connected to a chip collection pipe 610. The bottom end of the chip collection pipe 610 is connected to a material collection box 611. A negative pressure fan is fixedly installed inside the material collection box 611. An arc-shaped guide plate is set on the inner side wall of the material collection hood 69. The drive motor 67 and the negative pressure fan are both electrically connected to the PLC control system.

[0031] Under the action of the support spring 65, the toothed ring 63 can adaptively float in the vertical direction. During the punching operation, the PLC control system synchronously controls the start of the drive motor 67 and the negative pressure fan. The drive motor 67 drives the toothed ring 63 to rotate around the central axis of the punching station through the drive gear 68. The toothed ring 63 synchronously drives the multiple sets of scrapers 66 on the inner side to rotate in a circle. The top of the scraper 66 is in close contact with the lower surface of the sheet, continuously scraping away the punching waste, oxide scale and other impurities attached to the lower surface of the sheet. During the process, the support spring 65 at the bottom of the toothed ring 63 provides support for the toothed ring 63. The toothed ring 63 provides vertical elastic floating allowance. When the sheet metal has slight warping or thickness deviation, the toothed ring 63 can drive the scraper 66 to adaptively float up and down, ensuring that the scraper 66 is always in close contact with the lower surface of the sheet metal. This avoids scratching the sheet metal while ensuring effective chip removal. The high-temperature waste chips generated by punching fall into the collection hood 69 through the discharge hole of the punching table 11. The negative pressure suction generated by the start of the negative pressure fan forms a negative pressure flow channel through the chip collection pipe 610 and the collection hood 69, quickly sucking the falling high-temperature waste chips into the sealed collection box 611. The arc-shaped guide plate on the inner side of the collection hood 69 can prevent... Waste chips rebound and accumulate within the collection hood 69, ensuring that all waste chips enter the chip collection pipe 610, achieving full collection of waste chips. Addressing the issue that high-temperature waste chips generated during the high-temperature punching process of automotive leaf springs easily adhere to the sheet metal surface, scratch the sheet metal, wear the punching head, and pose a spontaneous combustion safety hazard, a rotating scraper 66 structure achieves synchronous and continuous cleaning of waste chips from the lower surface of the sheet metal during punching. Combined with the elastic floating design of the toothed ring 63, this ensures thorough chip removal while preventing scratches on the sheet metal surface by the scraper 66. Simultaneously, the negative pressure collection... The structure rapidly draws the high-temperature waste generated during punching into a sealed collection box 611, eliminating the problems of waste splashing and accumulation. This prevents waste from entering the stamping mating surface, thus avoiding wear on the stamping head and a decrease in punching accuracy. At the same time, the design of negative pressure collection and the sealed collection box 611 isolates the high-temperature waste from continuous contact with air, fundamentally eliminating the safety risk of spontaneous combustion of high-temperature waste, improving the safety of the production process, adapting to the continuous production needs of high-temperature punching of automotive leaf springs, and realizing simultaneous operation of punching and waste removal without the need for an additional waste removal process, further improving production efficiency.

[0032] In summary, this invention belongs to the field of automotive leaf spring processing technology. The closest existing technology is conventional punching equipment in the field of automotive leaf spring punching processing. Such equipment typically includes a conveying mechanism, a support frame, a hydraulic cylinder, a punching head, and a basic positioning mechanism, and has the basic functions of sheet material conveying and punching. Some existing technologies have made piecemeal improvements to address single defects. For example, some have added positioning sensors to optimize positioning accuracy, some have added mold cooling structures to extend mold life, and some have added negative pressure chip suction structures to clean up waste. However, none of these technologies have made systematic and coordinated improvements to address the four major related pain points in the entire process of high-temperature punching of automotive leaf springs. Furthermore, they have not provided any technical insights into the synergistic linkage between the various improvement modules. Therefore, the actual technical problem solved by this embodiment is how to overcome the fact that the improvements to high-temperature punching of automotive leaf springs in the existing technologies are only piecemeal optimizations of single defects, with no synergy between the modules and even mutual interference. They cannot simultaneously solve the four major related pain points of inaccurate long plate material conveying reference, high-temperature thermal expansion positioning deviation, high-temperature wear of the punching head, and quality and safety hazards caused by waste. There are no technical insights in the existing technologies that can organically combine the above four core improvement modules to form a mutually synergistic closed-loop operation system. The conventional design thinking of those skilled in the art is always to optimize a single pain point individually, and they cannot think of solving four interrelated industry pain points simultaneously through a coordinated technical solution, let alone the synergistic empowerment methods between the modules.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning and punching device for automotive leaf spring sheet metal, comprising a conveyor frame (10), a feeding rack (20) on the outside of the conveyor frame (10), a support frame (30) correspondingly mounted above the conveyor frame (10), a hydraulic cylinder (33) mounted on the support frame (30), and a punching head (34) mounted on the output end of the hydraulic cylinder (33), characterized in that: A positioning assembly (40) is installed on the outer side of the output end of the hydraulic cylinder (33). The positioning assembly (40) includes two sets of fixing plates (41). The outer ends of the two sets of fixing plates (41) are fixedly connected to guide rails (42). A positioning rod (43) is slidably mounted on the outer side of each set of guide rails (42). An electric sliding plate (44) is slidably mounted on the front and rear side walls of each set of guide rails (42). A clamping plate (45) is fixed at the end of each set of electric sliding plates (44). A positioning plate (46) is fixed on the inner side wall of the clamping plate (45). A laser displacement sensor is fixed on the outer side of the bottom of each set of electric sliding plates (44). The support frame (30) is equipped with a cooling assembly (50) on top. The cooling assembly (50) includes a cooling water tank (51) and a cooling pipe sleeve (55) fixedly sleeved on the outer wall of the punch head (34). The cooling pipe sleeve (55) is equipped with an inlet pipe (53) and an outlet pipe (54). The cooling water tank (51) is equipped with a water pump (52). The output end of the water pump (52) is connected to the inlet pipe (53), and the other end of the outlet pipe (54) is connected to the cooling water tank (51). The support frame (30) includes a fixed frame (31), a supporting steel beam (32) is fixed at the bottom of the fixed frame (31), and the hydraulic cylinder (33) is fixed on the fixed frame (31), and the hydraulic cylinder (33) is a multi-stage telescopic cylinder; The positioning component (40) also includes a fixing ring, which is fixed on the outside of the penultimate output cylinder of the hydraulic cylinder (33), and two sets of fixing plates (41) are symmetrically installed on the left and right sides of the fixing ring.

2. The automotive leaf spring sheet positioning and punching equipment according to claim 1, characterized in that: The top of the conveyor frame (10) is provided with a punching table (11) that corresponds to the punching head (34), and the top of the conveyor frame (10) is provided with conveying rollers (12) at intervals.

3. The automotive leaf spring sheet positioning and punching equipment according to claim 2, characterized in that: The unloading rack (20) includes a guide rack (21) that is perpendicular to the conveyor rack (10). The top of the guide rack (21) is equipped with a guide roller. A support platform (22) is provided between two adjacent sets of guide racks (21). The side of the guide rack (21) closest to the conveyor rack (10) is welded with an unloading plate that is flush with the top of the conveyor roller (12).

4. The automotive leaf spring sheet positioning and punching equipment according to claim 1, characterized in that: The outer side wall of the guide rail (42) is provided with a slide rail that matches the positioning rod (43), and the positioning rod is installed in the slide rail by an electric slider. The front and rear side walls of the guide rail (42) are provided with slide grooves that match the electric slide plate (44), and a positioning block is fixed on the positioning rod (43).

5. The automotive leaf spring sheet positioning and punching equipment according to claim 4, characterized in that: The cooling sleeve (55) is fixedly installed at the end of the last stage output cylinder of the hydraulic cylinder (33), and the punch head (34) is fixedly installed inside the cooling sleeve (55). A spiral water guide channel is provided inside the cooling sleeve (55), and a temperature sensor is installed on the cooling sleeve (55).

6. The automotive leaf spring sheet positioning and punching equipment according to claim 2, characterized in that: The waste cleaning component (60) is fixedly installed on the punching table (11). The punching table (11) has a discharge hole that corresponds to the punching head (34). A base (61) is fixed above the discharge hole. A rotating seat (62) is rotatably mounted on the top of the base (61). A gear ring (63) is mounted on the top of the rotating seat (62). A buffer groove is evenly provided along the circumferential direction at the bottom of the gear ring (63). A guide cylinder (64) extending into the buffer groove is fixed on the top of the rotating seat (62). A support spring (65) is fixed inside the guide cylinder (64). The top of the support spring (65) is fixed on the top of the inner cavity of the buffer groove. A drive motor (67) is fixed on the top of the punching table (11). A gear (68) meshing with the gear ring (63) is fixed at the output end of the drive motor (67). A scraper (66) is evenly fixed along the circumferential direction on the inner side wall of the gear ring (63).

7. The automotive leaf spring sheet positioning and punching equipment according to claim 6, characterized in that: The top of the scraper (66) is passivated, and the top of the scraper (66) is slightly higher than the top of the conveyor roller (12), while the top of the gear (68) is lower than the top of the conveyor roller (12).

8. The automotive leaf spring sheet positioning and punching equipment according to claim 7, characterized in that: The waste cleaning component (60) also includes a material collection hood (69) set at the bottom of the punching platform (11). The bottom of the material collection hood (69) is connected to a chip collection pipe (610). The bottom end of the chip collection pipe (610) is connected to a material collection box (611). A negative pressure fan is fixedly installed inside the material collection box (611). An arc-shaped guide plate is provided on the inner side wall of the material collection hood (69).

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