A continuous stamping die for automobile seat slide rail strip production

Abstract

The present application relates to the technical field of automobile parts processing, and discloses a continuous stamping die for automobile seat slide rail sheet production, which comprises a stamping table, a die holder, a pressing plate, a frame, a first telescopic part, a cutting position, a blanking position and a stamping position formed between the die holder and the pressing plate, and further comprises a blanking plate, a supporting plate, a supporting part, a pressing ring, a guide assembly and a lower pressing assembly, the guide assembly is installed in the perforation, the lower pressing assembly is installed in the punch, when the punch moves downward, the guide assembly cooperates with the lower pressing assembly to push the released inner ring pressing ring downward, so as to adjust the blanking gap. Through the cooperation of the pressing ring, the adjusting rod, the guide assembly and the lower pressing assembly, the gap can be dynamically adjusted during blanking, which smoothly transitions from a micro-negative gap to a micro-positive gap, ensures that the material is in a plastic shearing state throughout the process, eliminates the cross-section tear band and burr from the principle, improves the proportion of hole wall bright band and size accuracy, saves the subsequent deburring process, and reduces the processing cost.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and more specifically to a continuous stamping die for producing automotive seat slide rail sheet materials. Background Technology

[0002] Seat rails are important mechanical components of car seats. Commonly, they are installed under the seat to allow for positional adjustments in the fore-aft, left-right, and other directions. These mechanisms typically consist of an upper rail, a lower rail, a locking mechanism (manual), an adjustment mechanism (electric), ball bearings, and ball bearing retainers.

[0003] The core process of seat slide rail stamping includes raw material preparation and blanking, multiple stamping forming processes, and post-stamping processing. In the raw material preparation and blanking stage, the steel plate must first be leveled and straightened to eliminate internal stress and prevent deformation after stamping. In the multiple stamping forming process, the slide rail's groove structure cannot be completed in one stamping operation; it must be formed gradually through multiple processes. Typical processes include: punching and trimming, where mounting holes, limiting holes, and weight-reducing holes are punched out first, while excess edges of the blank are removed to prepare for subsequent forming; bending and deep drawing, where the sheet metal is bent into a U-shaped basic cross-section using a bending die, and then through multiple deep drawing and shaping stations, the guide rail groove, reinforcing ribs, and other structures of the slide rail are gradually formed to ensure dimensional accuracy; pressing and shaping, where reinforcing ribs are pressed onto the slide rail surface to improve structural strength and rigidity; and finally, the springback deformation of the stamped part is corrected through the shaping station to ensure that the straightness and cross-sectional dimensions of the slide rail meet tolerance requirements. In the post-stamping process, the slide rail stamping parts need to be deburred. Since burrs will be generated on the edges and holes of the stamping parts, they are usually removed by sanding with a belt, cleaning with a roller brush or chemical deburring to avoid affecting subsequent assembly and sliding performance.

[0004] In the blanking process of slide rail sheet stamping, traditional fine blanking cannot precisely control the blanking clearance when dealing with high-strength steel or complex contours, resulting in localized burrs on the cross-section inside the hole. These burrs directly affect product quality and necessitate an additional deburring process, thus increasing processing costs. Furthermore, current blanking generally employs a one-step blanking method with a punch, which requires the punch to withstand significant blanking forces, leading to substantial wear and frequent punch replacements. This not only impacts production efficiency but also further increases die usage costs. Therefore, reducing burrs and minimizing punch wear during slide rail sheet blanking has become a pressing technical problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a continuous stamping die for the production of automotive seat slide rail sheets, thereby reducing burrs on the blanking surface, reducing punch wear, and saving processing costs.

[0006] The objective of this invention can be achieved through the following technical solutions: A continuous stamping die for producing automotive seat slide rail sheet material includes a stamping table, a die base, a pressure plate, a frame, a telescopic component, and a cutting position, a blanking position, and a stamping position formed between the die base and the pressure plate, and further includes: A blanking plate is installed at the blanking position of the pressure plate. A telescopic component 2 that drives the blanking plate to move up and down is also installed on the pressure plate. Several punches are provided at the bottom of the blanking plate. The pressure plate is equipped with a synchronous moving component three on its side and a support plate on its other end. The support plate is located below the stamping table and has several support components on its top that are longitudinally aligned with the punching holes on the die base. The support components are used to support the material sheet. The pressure plate has several through holes, and several punches and several through holes are longitudinally aligned. Several pressure rings with proportionally increasing sizes are arranged in the through holes from the inside to the outside. Adjacent pressure rings fit together, and the innermost pressure ring fits against the outer wall of the punch. The bottom ends of several pressure rings are flush with the bottom surface of the pressure plate and are used to press the top surface of the material sheet. Several adjusting rods that pass through several pressure rings are movably installed in the pressure plate at the positions corresponding to the through holes. By moving the position of the adjusting rods, the inner pressure rings are released and used to adjust the punching gap. The guide assembly and the pressing assembly are installed inside the perforation and the pressing assembly is installed inside the punch. When the punch moves down, the guide assembly and the pressing assembly cooperate to push the inner ring pressure ring, which has been released from restriction, down, thereby adjusting the punching gap.

[0007] As a further aspect of the present invention: the outer periphery of the pressure ring is provided with a plurality of fixing holes for fixing the adjusting rod, and the outer periphery of the pressure ring is provided with a plurality of guide blocks. Except for the innermost pressure ring, the inner walls of the other pressure rings are provided with a plurality of guide grooves II, and the through holes are provided with a plurality of guide grooves I. The guide blocks on the inner ring are slidably installed in the plurality of guide grooves II on the outer wall of the outer pressure ring, and the guide blocks on the outermost pressure ring are slidably installed in the plurality of guide grooves I.

[0008] As a further aspect of the present invention: an elastic element 2 is connected between the guide block and the guide groove 2 or the guide groove 1, and the sides of the guide block and the guide groove 2 or the guide groove 1 opposite to each other are provided with magnetic elements with opposite magnetic properties.

[0009] As a further aspect of the present invention: the guide assembly includes several push rods and wedge seats, the perforated outer ring has several movable grooves, the push rods extend through into the movable grooves, the end of the push rods is provided with wedge seats, the bottom of the wedge seats is in contact with the tops of several pressure rings, the push rods are connected to the adjusting rods through connectors, the adjusting rods move to make the push rods move synchronously, the line formed longitudinally by the inclined bottom end of the wedge seat side coincides with the line formed longitudinally by the end face of the adjusting rod, the pressing assembly includes several telescopic plates, the punch has an installation cavity, the telescopic plates are laterally movable in the installation cavity, and the telescopic plates are in contact with the inclined surface of the wedge seats.

[0010] As a further aspect of the present invention: a synchronous moving component two is installed inside the mounting cavity, several telescopic plates are connected to the synchronous moving component two, and an elastic element three is connected between the end face of the telescopic plate and the inner wall of the mounting cavity. A connecting plate is provided on the telescopic plate through a support plate, and ball bearings are symmetrically installed on the connecting plate. The longitudinal projection of the ball bearings is located outside the outer end face of the telescopic plate. Movable inclined plates are symmetrically slidably installed on both sides of the wedge-shaped seat, and fixed inclined plates are symmetrically fixedly arranged in the movable groove. The fixed inclined plates are located below the movable inclined plates, and the bottom end of the movable inclined plate is in contact with the inclined surface of the top end of the fixed inclined plate. The ball bearings move along the trajectory formed by the movable inclined plate and the fixed inclined plate. Several storage cavities are opened around the punch.

[0011] As a further embodiment of the present invention: the support member includes a fixed cylinder and a top rod. The fixed cylinder is fixed to the top of the support plate. A piston rod is longitudinally and movably installed inside the fixed cylinder. A top rod is provided at the top of the piston rod. The top rod is used to support the material sheet. An inflation valve is installed on the side of the fixed cylinder. The inflation valve is connected to an external inflation unit. The inflation valve is a one-way valve.

[0012] As a further embodiment of the present invention: the fixed cylinder is provided with a telescopic groove and an exhaust hole. A wedge block is movably installed in the telescopic groove. The wedge block is located below the piston rod and its inclined surface faces upward. A linkage plate is provided at one end of the wedge block in the telescopic groove. An elastic element is connected between the linkage plate and the telescopic groove. A sealing plate is movably installed at the exhaust hole. A step is provided at the exhaust hole to prevent the sealing plate from moving outward. Four sets of guide frames corresponding to the four corners of the sealing plate are also provided. A synchronous moving component for connecting the linkage plate and the sealing plate is also installed in the exhaust hole.

[0013] As a further aspect of the present invention: a cutting knife is provided at the cutting position of the pressure plate, and a stamping die is provided at the stamping position of the pressure plate and the die holder.

[0014] The beneficial effects of this invention are: (1) The present invention can dynamically adjust the gap during the punching process by cooperating the pressure ring, adjusting rod, guide assembly and pressing assembly, so that it can smoothly transition from a slightly negative gap to a slightly positive gap, ensuring that the material is in a plastic shear state throughout the process, thereby eliminating the tearing band and burrs on the cross section in principle, increasing the proportion of bright band on the hole wall and dimensional accuracy, eliminating the need for subsequent deburring process, and reducing processing costs.

[0015] (2) The present invention utilizes the sealed cavity formed between the pressure ring and the punch to pre-press the sheet, so that the central area of ​​the sheet is pre-stretched and thinned and enters the plastic yield state in advance, effectively reducing the peak value of the punching force, reducing the impact load on the punch, reducing the wear of the punch, extending the service life of the punch, and at the same time, making the separation crack stable and further improving the cross-sectional quality.

[0016] (3) The present invention provides a gradually increasing pneumatic reaction force in the early stage of punching by working together with the piston rod, wedge block, sealing plate and air valve in the support to strengthen the triaxial compressive stress and suppress the premature initiation of microcracks; in the final stage of punching, it automatically exhausts and relieves pressure, reduces reaction force, makes the waste material separate cleanly, avoids secondary tearing and burr generation, and facilitates waste material discharge, thereby improving punching stability and yield. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from another perspective; Figure 3 This is a schematic diagram of the structure of the mold base, pressure plate, and support plate in this invention; Figure 4 This is a schematic diagram of the structure of the pressure plate and the punching plate after disassembly in this invention; Figure 5 This is a partial structural diagram of the mold base and pressure plate in this invention; Figure 6 This is a schematic diagram of the cross-sectional structure of a portion of the mold base and pressure plate in this invention; Figure 7 This is a schematic diagram of the internal structure of the pressure plate in this invention; Figure 8 This is a schematic diagram of the guide component structure in this invention; Figure 9 This is a schematic diagram of the downward pressing component structure in this invention; Figure 10 This is a schematic diagram of the pressure ring connection structure in this invention; Figure 11 This is a schematic diagram of the cross-sectional structure of the support member in this invention; Figure 12 yes Figure 11Enlarged structural diagram at point A in the middle.

[0019] In the picture: 1. Stamping table; 2. Die base; 21. Punching hole; 3. Pressure plate; 31. Through hole; 32. Movable groove; 33. Guide groove one; 4. Punching plate; 41. Punch; 411. Mounting cavity; 412. Storage cavity; 5. Support plate; 6. Support component; 61. Fixed cylinder; 611. Telescopic groove; 612. Vent hole; 613. Guide frame; 62. Piston rod; 63. Push rod; 64. Air valve; 65. Wedge block; 651. Linkage plate; 652. Elastic component one; 66. Sealing plate; 67. Synchronous movement assembly one; 7. Pressure ring; 71. Fixed hole; 72. Guide block 73. Elastic component II; 74. Magnetic component; 75. Guide groove II; 8. Guide assembly; 81. Push rod; 82. Connector; 83. Wedge seat; 84. Movable inclined plate; 85. Fixed inclined plate; 9. Pressing assembly; 91. Telescopic plate; 92. Support plate; 93. Connecting plate; 94. Ball bearing; 95. Synchronous movement assembly II; 96. Elastic component III; 10. Adjusting rod; 11. Frame; 12. Telescopic component I; 13. Telescopic component II; 14. Cutting position; 141. Cutting knife; 15. Punching position; 16. Stamping position; 161. Stamping die; 17. Synchronous movement assembly III. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-10 As shown, a continuous stamping die for producing automotive seat slide rail sheet material includes a stamping table 1, a die base 2, a pressure plate 3, a frame 11, a telescopic component 12, and a cutting position 14, a blanking position 15, and a stamping position 16 formed between the die base 2 and the pressure plate 3. It also includes: The blanking plate 4 is installed at the blanking position 15 of the pressure plate 3. The pressure plate 3 is also equipped with a telescopic component 13 that drives the blanking plate 4 to move up and down. The bottom of the blanking plate 4 is provided with several punches 41. Support plate 5 and support member 6, synchronous moving component 3 17 is installed on the side of pressure plate 3, and support plate 5 is installed at the other end of synchronous moving component 3 17. Support plate 5 is located below stamping table 1, and its top is provided with several support members 6 that longitudinally overlap with the punching hole 21 on mold base 2. Support members 6 are used to support the material sheet. The pressure ring 7 and the pressure plate 3 have several through holes 31. Several punches 41 and several through holes 31 overlap longitudinally. Several pressure rings 7 with proportionally increasing size are provided in the through holes 31 from the inside to the outside. Adjacent pressure rings 7 are in close contact with each other. The innermost pressure ring 7 is in close contact with the outer wall of the punch 41. The bottom end of several pressure rings 7 is flush with the bottom surface of the pressure plate 3 and is used to press the top surface of the material sheet. Several adjusting rods 10 are movably installed in the pressure plate 3 at the position corresponding to the through holes 31, which pass through several pressure rings 7. By moving the position of the adjusting rods 10, the inner pressure rings 7 are released and used to adjust the punching gap. The guide assembly 8 and the pressing assembly 9 are installed inside the through hole 31. The guide assembly 8 is installed inside the punch 41. When the punch 41 moves down, the guide assembly 8 and the pressing assembly 9 cooperate to push the inner ring pressure ring 7, which has been released from restriction, down, thereby adjusting the punching gap.

[0022] In one embodiment, the adjusting rod 10 can be connected to an external hydraulic closed-loop mechanism, which drives the adjusting rod 10 to move. The corresponding connecting pipe is installed inside the pressure plate 3. Alternatively, the adjusting rod 10 can be a screw, allowing multiple partitions to be set at the bottom of the pressure plate 3 corresponding to several holes. A gap exists between each partition, and the screw is located within the gap. The position of the adjusting rod 10 is adjusted by rotating the screw. The synchronous moving assembly 17 can consist of a gear and two sets of gear plates symmetrically aligned along the gear's centerline. The synchronous moving assembly 17 causes the pressure plate 3 and the support plate 5 to move synchronously in the same direction or synchronously in opposite directions. Furthermore, it should be noted that since the size and shape of the holes to be punched on the sheet material vary, the pressure ring 7 can be set to be similar in shape to the hole, and the shape of the punch 41 can also be similar to the hole shape. This ensures that holes of different shapes have the same quality after punching.

[0023] In practical application, the wound material sheet is straightened and leveled before being moved to the cutting position 14. At this time, the telescopic component 12 causes the pressure plate 3 to move downward, thereby cutting the material sheet into sheet pieces. After the pressure plate 3 moves upward, the sheet pieces are moved to the punching position 15 by an external translational robot. At this time, the pressure plate 3 moves downward to punch holes in the sheet pieces. After punching, the pressure plate 3 moves upward, and the punched sheet pieces are moved to the stamping position 16 by an external translational robot. At this time, the pressure plate 3 moves downward to stamp and shape the sheet pieces. After multiple stampings, the original sheet pieces are formed into slide rails. Continuous stamping is achieved by the reciprocating movement of the pressure plate 3, in conjunction with the movement of the sheet pieces by the external translational robot.

[0024] During punching, the pressure plate 3 and several pressure rings 7 are first used to press the sheet material onto it. A V-shaped toothed ring is also provided at the bottom of the pressure ring 7. The pressure plate 3 and the pressure rings 7 apply pressure FR, causing the V-shaped toothed ring to press the sheet material tightly onto the die base 2. This generates lateral pressure on the inner surface of the V-shaped toothed ring, preventing the sheet material from tearing in the shearing zone and preventing the metal from flowing laterally. While the punch 41 presses the sheet material downwards, the support member 6 provides support, generating a reaction force FG to press the sheet material tightly. Under this pressed state, The punching force FS generated by the punch 41 is used for punching, which puts the sheet in the shearing area under triaxial compressive stress. According to plasticity mechanics, the higher the hydrostatic pressure (compressive stress equal in all directions), the better the plasticity of the material. Triaxial compressive stress can effectively inhibit the initiation and propagation of microcracks, allowing the sheet to withstand greater deformation before failure. This will significantly increase the proportion of bright bands in the final cross-section and reduce the rough part of the fracture band, thereby effectively avoiding burrs on the cross-section and eliminating the need for subsequent grinding or trimming processes.

[0025] Before stamping, the position of the adjusting rod 10 is adjusted so that one or more pressure rings 7 are in an unrestricted state. The gap between the outermost of the one or more pressure rings 7 in the unrestricted state and the punching hole 21 is the punching gap. The size of the punching gap is adjusted by adjusting the number of pressure rings 7 in the unrestricted state, so that the punching gap can be precisely controlled and burrs on the cross-section can be avoided. Specifically, during punching, the punch 41 moves downward, and through the cooperation of the guide assembly 8 and the pressing assembly 9, pushes the unrestricted inner ring pressure ring 7 downward. At this time, the unrestricted inner ring pressure ring 7 makes the punching clearance a slightly negative clearance, an elastic negative clearance, or an effective negative clearance. The inner ring pressure ring 7 first squeezes the sheet material, and the sheet material is subjected to strong compressive stress at the hole edge. Cracks will be delayed or suppressed. The hole wall is mainly subjected to plastic shearing, extrusion, and shaping at this time. Therefore, the hole opening collapse angle will be reduced, the bright band will be increased, and the perpendicularity and dimensional accuracy of the hole wall will be further improved. When the inner ring pressure ring 7 is pressed into about 1 / 4 to 1 / 3 of the sheet material thickness, the pressing assembly 9 releases the pressure on the inner ring pressure ring 7. At this time, the punching... The head 41 moves down to perform punching. At this time, the punching clearance becomes a slightly positive clearance. The sheet begins to crack and separate in a positive clearance manner. This avoids excessive punching force, scrap jamming, die wear and die cracking caused by a negative clearance throughout the process. It also makes it easier for scrap to fall off. At the same time, it avoids rough tearing and large and thick burrs on the cross-section caused by a positive clearance throughout the process. Thus, the punching clearance is dynamically adjusted during the punching process, so that the punching clearance is finely adjusted from a slightly negative clearance to a slightly positive clearance. In conjunction with the adjustment of the punching pressure by the telescopic component 13, the combined dynamic control of pressure and clearance ensures that the cross-section is in a plastic shear state throughout the process, thus eliminating tearing and burrs in principle. Furthermore, when the inner ring pressure ring 7 presses down on the sheet, an annular groove is formed on the sheet. When the punch 41 moves down along the innermost pressure ring 7, a sealed cavity is formed between the innermost pressure ring 7, the sheet, and the punch 41. During the downward movement of the punch 41, the pressure inside the sealed cavity increases, and the pressure is applied to the central area surrounded by the annular groove of the sheet. This causes the central area to bulge downward, forming a small dome-shaped pre-deformation. This stretches and thins the thickness of the central area, and it is already in a state of plastic yielding or close to yielding. When the punch 41 contacts... There is no need to start extruding the sheet from scratch. Instead, the cutting can be completed with less force by continuing to cut into the pre-stretched and "softened" weak area. This improves the punching efficiency and reduces the impact load on the punch 41, thus reducing its wear. When the punch 41 cuts in, this pre-stretching causes the lower surface crack (fracture source) to be generated in advance and stably at the designated location. This helps to obtain a more uniform ratio of shear band to fracture band, thereby further improving the brightness of the cross-section and reducing the randomness of tear seams and burrs.

[0026] The inner ring pressure ring 7 first punches the sheet with a slight negative gap, and then the punch 41 punches the sheet with a slight positive gap. This causes the sheet to be subjected to two punching forces sequentially during punching. Compared to the traditional punching process where the punch 41 bears both pressing and shearing forces simultaneously, the pressure ring 7 here bears the pressing force, thereby pre-pressing and changing the stress state of the sheet. This transforms the punch 41 from pure shearing to shearing with compressive stress, which effectively reduces the peak value of the punching force, making the shearing process smoother, thereby reducing the impact load on the punch 41 and thus reducing the wear of the punch 41.

[0027] Furthermore, the outer periphery of the pressure ring 7 is provided with several fixing holes 71 for fixing the adjusting rod 10, and the outer periphery of the pressure ring 7 is provided with several guide blocks 72. Except for the innermost pressure ring 7, the inner walls of the other pressure rings 7 are provided with several guide grooves 75, and the through hole 31 is provided with several guide grooves 33. The guide blocks 72 on the inner ring 7 are slidably installed in the guide grooves 75 on the outer wall of the outer pressure ring 7, and the guide blocks 72 on the outermost pressure ring 7 are slidably installed in the guide grooves 33. The guide blocks 72 are connected to the guide grooves 75 or the guide grooves 33 by elastic elements 73. The side of the guide block 72 opposite to the guide grooves 75 or the guide grooves 33 is provided with magnetic elements 74 with opposite magnetic properties.

[0028] In practical application, the up-and-down movement of the pressure ring 7 can be restricted by inserting the adjusting rod 10 into the fixing hole 71 on the pressure ring 7. Thus, by adjusting the position of the adjusting rod 10, the number of pressure rings 7 in the unrestricted state can be changed, thereby changing the punching gap. By cooperating with the guide block 72 and the guide groove 33 or the guide groove 75, the rotation of the pressure ring 7 can be restricted. On the one hand, this ensures that the adjusting rod 10 can pass smoothly through the fixing hole 71 when adjusting the position. On the other hand, it prevents the pressure ring 7 from rotating and causing wear, which would lead to changes in its size and reduce its ability to adjust the punching gap. By using the elastic element 73 and the magnetic element 74 with opposite magnetic properties, the inner ring pressure ring 7 can quickly return to its original position when the pressing component 9 pushes the inner ring pressure ring 7 down a certain distance and the pressing component 9 releases the restriction on the inner ring pressure ring 7. This ensures that the punching gap is dynamically adjusted from a slightly negative gap to a slightly positive gap, thus ensuring the punching effect.

[0029] Furthermore, the guide assembly 8 includes several push rods 81 and wedge seats 83. Several movable grooves 32 are provided on the outer ring of the through hole 31. The push rods 81 extend through into the movable grooves 32. The end of the push rod 81 is provided with a wedge seat 83. The bottom of the wedge seat 83 is in contact with the top of several pressure rings 7. The push rod 81 is connected to the adjusting rod 10 through the connector 82. The movement of the adjusting rod 10 causes the push rod 81 to move synchronously. The line formed longitudinally by the inclined bottom end of the wedge seat 83 coincides with the line formed longitudinally by the end face of the adjusting rod 10. The pressing assembly 9 includes several telescopic plates 91. An installation cavity 411 is provided in the punch 41. The telescopic plates 91 are laterally movable in the installation cavity 411. The telescopic plates 91 are in contact with the inclined surface of the wedge seat 83.

[0030] A synchronous moving component 2 95 is installed inside the mounting cavity 411. Several telescopic plates 91 are connected to the synchronous moving component 2 95. An elastic element 3 96 is connected between the end face of the telescopic plate 91 and the inner wall of the mounting cavity 411. A connecting plate 93 is provided on the telescopic plate 91 through the support plate 92. Ball bearings 94 are symmetrically installed on the connecting plate 93. The longitudinal projection of the ball bearings 94 is located outside the outer end face of the telescopic plate 91. Movable inclined plates 84 are symmetrically slidably installed on both sides of the wedge-shaped seat 83. Fixed inclined plates 85 are symmetrically fixedly arranged in the movable groove 32. The fixed inclined plates 85 are located below the movable inclined plates 84, and the bottom end of the movable inclined plate 84 is in contact with the inclined surface of the top end of the fixed inclined plate 85. The ball bearings 94 move along the trajectory formed by the movable inclined plate 84 and the fixed inclined plate 85. Several storage cavities 412 are opened around the punch 41.

[0031] In one embodiment, the second synchronous movement component 95 may consist of a gear and two sets of toothed plates symmetrically arranged along the center axis of the gear. The second synchronous movement component 95 causes several telescopic plates 91 to move synchronously inward or outward. When the position of the wedge seat 83 changes, the movable inclined plate 84 slides along the side of the wedge seat 83, ensuring that the bottom end of the movable inclined plate 84 always abuts against the inclined surface of the fixed inclined plate 85, thus ensuring that the balls 94 always roll along the trajectory formed by the movable inclined plate 84 and the fixed inclined plate 85.

[0032] In practical application of this embodiment, during punching, the first telescopic component 12 first drives the pressure plate 3 to press onto the sheet material. Then, the second telescopic component 13 causes the punching plate 4 to move downwards. The punching plate 4 then drives several punches 41 of different shapes to insert into the through hole 31. Initially, the ball bearing 94 contacts the movable inclined plate 84. During the downward movement of the punches 41, the ball bearing 94 causes the telescopic plate 91 to gradually retract into the mounting cavity 411, and several telescopic plates 91 move synchronously. When the telescopic plate 91 contacts the top of the pressure ring 7, the telescopic plate 91 will squeeze the unrestricted inner ring pressure ring 7 downwards, thereby making the initial punching gap a slightly negative gap state, so that the inner ring pressure ring 7... First, the sheet material is squeezed. At the same time, the telescopic plate 91 moves downward and into the mounting cavity 411, so that the contact area between the telescopic plate 91 and the pressure ring 7 becomes smaller and smaller. When the telescopic plate 91 separates from the top of the pressure ring 7, the ball 94 is still rolling on the fixed inclined plate 85. When the punch 41 continues to move downward, the ball 94 will retract into the receiving cavity 412. At this time, the punch 41 punches the sheet material with a slight positive gap, thereby dynamically adjusting the punching gap during the punching process. In conjunction with the telescopic part 13 to adjust the punching pressure, the combined dynamic control of pressure and gap is achieved, ensuring that the cross-section is in a plastic shear state throughout the process, thus eliminating tear strips and burrs in principle. During the downward pressing of the pressure ring 7, the telescopic plate 91 will successively separate from one or more unrestricted pressure rings 7 from the outside in. When there are multiple unrestricted pressure rings 7, when the telescopic plate 91 separates from the outermost pressure ring 7, the outermost pressure ring 7 will spring back to its original position. This allows the punching clearance to gradually transition from a slightly negative clearance to a slightly positive clearance during dynamic adjustment and remain stable. This results in better hole quality, smoother cross-sectional transition, and reduced burrs and secondary shear marks. Specifically, in the slightly negative clearance, the edge of the blank hole is subjected to more... Under strong compressive stress and extrusion shaping, cracks are less likely to occur prematurely. The material is more subjected to plastic shearing and extrusion flow, resulting in a smaller orifice collapse angle and a significant increase in the bright band. As the gap gradually changes from slightly negative to zero and then to slightly positive, the stress state of the material changes continuously, and cracks will start and propagate more naturally. This is less likely to form obvious "cutting line", "step mark" or annular tear mark in the middle of the hole wall than when suddenly switching to a positive gap. Maintaining a slightly positive gap in the later stage allows for smooth separation and discharge of waste material.

[0033] like Figure 3 , Figure 11 and Figure 12 As shown, the support member 6 includes a fixed cylinder 61 and a top rod 63. The fixed cylinder 61 is fixed to the top of the support plate 5. A piston rod 62 is longitudinally and movably installed inside the fixed cylinder 61. A top rod 63 is provided at the top of the piston rod 62. The top rod 63 is used to support the material sheet. An inflation valve 64 is installed on the side of the fixed cylinder 61. The inflation valve 64 is connected to an external inflation unit. The inflation valve 64 is a one-way valve.

[0034] The fixed cylinder 61 has a telescopic groove 611 and an exhaust hole 612. A wedge block 65 is movably installed in the telescopic groove 611. The wedge block 65 is located below the piston rod 62 with its inclined surface facing upward. A linkage plate 651 is provided at one end of the wedge block 65 in the telescopic groove 611. An elastic element 652 is connected between the linkage plate 651 and the telescopic groove 611. A sealing plate 66 is movably installed at the exhaust hole 612. A step is provided at the exhaust hole 612 to prevent the sealing plate 66 from moving outward. Four sets of guide frames 613 corresponding to the four corners of the sealing plate 66 are also provided. A synchronous movement component 67 for connecting the linkage plate 651 and the sealing plate 66 is also installed in the exhaust hole 612.

[0035] In one embodiment, the synchronous movement component 67 may consist of a gear and two sets of toothed plates symmetrically arranged along the center axis of the gear. The synchronous movement component 67 enables the wedge block 65 and the sealing plate 66 to move synchronously in the same direction or synchronously in opposite directions.

[0036] In practical application, during the punching process, the pressure plate 3 moves downward and, through the transmission of the synchronous moving component 67, the support plate 5 drives several support members 6 to move upward synchronously, so that the support members 6 are inserted into the punching hole 21. The support members 6 support the material sheet during the punching process. Specifically, when the pressure ring 7 or punch 41 cuts the sheet material, the push rod 63 provides an upward reaction force, thus placing the sheet material in a triaxial compressive stress state. When the material at the orifice is squeezed downward, the push rod 63 also moves downward. At this time, the air inside the fixed cylinder 61 is compressed, causing the pressure in the fixed cylinder 61 to increase. This increases the upward reaction force provided by the push rod 63, further strengthening the triaxial compressive stress capability and thus further inhibiting the premature initiation and propagation of microcracks. When the piston rod 62 moves down to the wedge block 65, the wedge block 65 gradually retracts into the telescopic groove 611. Through the transmission of the synchronous moving component 67, the sealing plate 66 moves towards the fixed cylinder 61, thus gradually opening the vent hole 612, and the size of the vent hole 612 becomes larger and larger. This causes the compressed air inside the fixed cylinder 61 to be discharged from the exhaust port 612, thereby gradually reducing the reaction force of the ejector rod 63. At the end of the punching process, the remaining connecting part of the material is very thin. Excessive punching force and reaction force may squeeze the material into the gap between the pressure plate 3 and the die holder 2, generating axial tensile stress, which may cause secondary tearing or large burrs. Reducing the reaction force at this time can make the final separation process more decisive, thereby further avoiding the generation of burrs. During the process of the pressure plate 3 moving upward after punching, the support plate 5 drives several support members 6 to move downward, and the waste generated by punching will be discharged from the punching hole 21. During this process, under the rebound action of the elastic member 652, in conjunction with the external inflation unit, air is injected into the fixed cylinder 61 through the inflation valve 64, so that the sealing plate 66 and the ejector rod 63 return to their original positions.

[0037] like Figure 1and Figure 2 As shown, a cutting knife 141 is provided at the cutting position 14 of the pressure plate 3, and a stamping die 161 is provided at the stamping position 16 of the pressure plate 3 and the die holder 2.

[0038] In practical application, the cutter 141 cuts the leveled material plate into pieces, and the stamping die 161 is equipped with multiple sets of dies of different shapes to bend the material pieces into a U-shaped basic cross section. After multiple drawing and shaping stations, the guide rail groove, reinforcing ribs and other structures of the slide rail are gradually formed.

[0039] Working principle: After leveling, the material plate enters the cutting position 14. The telescopic component 12 pushes the pressure plate 3 downward, and the cutter 141 cuts the material plate into sheet pieces. After the pressure plate 3 moves upward, the external translation robot transfers the sheet pieces to the punching position 15. The telescopic component 12 presses down again, and at the same time, the synchronous moving component 17 drives the support plate 5 to rise, so that the push rod 63 of the support component 6 extends into the punching hole 21 of the die base 2 and supports the bottom surface of the sheet piece. The pressure plate 3 and the pressure ring 7 on its bottom surface press against the top surface of the sheet piece and apply a clamping force. According to the characteristics of the sheet piece, the adjusting rod 10 is moved in advance to disengage part of the fixing hole 71 of the pressure ring 7, the number of pressure rings 7 in the unrestricted state is set, and the initial punching gap is determined. Subsequently, the telescopic component 13 drives the punching plate 4 to descend, and the punch 41 enters the through hole 31. The balls 94 of the pressing component 9 roll along the movable inclined plate 84 and the fixed inclined plate 85 of the guide component 8, pushing the telescopic plate 91 and pressing down on the top of the inner ring pressure ring 7, which has been released from its restraint. This forces the pressure ring 7 to move downward and press into the sheet material first with a slight negative gap. The sheet material undergoes plastic deformation under triaxial compressive stress. At the same time, a sealed cavity is formed between the pressure ring 7, the punch 41, and the sheet material. The punch 41 continues to move downward and compresses the air in the cavity, causing the central area of ​​the sheet material to be pre-stretched and thinned. The punch 41 continues to descend, and the balls 94 move on the fixed inclined plate 85, causing the telescopic plate 91 to gradually retract into the mounting cavity 411 under the action of the elastic component 96 and the synchronous moving component 95, until it separates from the top surface of the pressure ring 7. The pressure ring 7 is reset under the action of the elastic component 73 and the magnetic component 74, and the punching gap dynamically switches to a slight positive gap. The punch 41 completes the final shearing separation. During the punching process, the push rod 63 is pressed to push the piston rod 62 to compress the air inside the fixed cylinder 61, providing a gradually increasing reaction force to strengthen the triaxial compressive stress. When the piston rod 62 touches the wedge block 65, the wedge block 65 retracts into the telescopic groove 611. Through the synchronous moving component 67, the sealing plate 66 is moved to open the exhaust port 612, the gas inside the fixed cylinder 61 is discharged, the reaction force is reduced, and the scrap is separated smoothly. After the punching is completed, the pressure plate 3 and the support plate 5 are reset, the scrap falls from the punching hole 21, and the robot sends the punched sheet into the stamping position 16. Through the stamping die 161, it undergoes multiple bending, drawing and shaping, and is finally formed into a seat slide rail.

Claims

1. A continuous stamping die for producing automotive seat slide rail sheet material, comprising a stamping table (1), a die base (2), a pressure plate (3), a frame (11), a telescopic component (12), and a cutting position (14), a blanking position (15), and a stamping position (16) formed between the die base (2) and the pressure plate (3), characterized in that, Also includes: The blanking plate (4) is installed at the blanking position (15) of the pressure plate (3). The pressure plate (3) is also equipped with a telescopic component (13) that drives the blanking plate (4) to move up and down. The bottom of the blanking plate (4) is provided with several punches (41). Support plate (5) and support member (6), the side of the pressure plate (3) is equipped with a synchronous moving component three (17), the other end of the synchronous moving component three (17) is equipped with a support plate (5), the support plate (5) is located below the stamping table (1), and its top is provided with several support members (6) that longitudinally overlap with the punching holes (21) on the mold base (2), the support members (6) are used to support the material sheet; The pressure ring (7) is provided with several through holes (31) on the pressure plate (3). Several punches (41) and several through holes (31) overlap longitudinally. Several pressure rings (7) with increasing size are provided in the through holes (31) from the inside to the outside. Adjacent pressure rings (7) fit together. The innermost pressure ring (7) fits against the outer wall of the punch (41). The bottom end of several pressure rings (7) is flush with the bottom surface of the pressure plate (3) to press the top surface of the material sheet. Several adjusting rods (10) that pass through several pressure rings (7) are movably installed in the pressure plate (3) at the position corresponding to the through holes (31). By moving the position of the adjusting rods (10), the inner pressure rings (7) are released from restriction and used to adjust the punching gap. The guide assembly (8) and the pressing assembly (9) are installed in the through hole (31) and the pressing assembly (9) is installed in the punch (41). When the punch (41) moves down, the guide assembly (8) and the pressing assembly (9) cooperate to push the inner ring pressure ring (7) which has been released from restriction to press down, thereby adjusting the punching gap.

2. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 1, characterized in that, The pressure ring (7) has several fixing holes (71) for fixing the adjusting rod (10) on its outer periphery. The pressure ring (7) has several guide blocks (72) on its outer periphery. Except for the innermost pressure ring (7), the inner walls of the other pressure rings (7) have several guide grooves (75). The through hole (31) has several guide grooves (33). The guide blocks (72) on the inner ring (7) are slidably installed in the guide grooves (75) on the outer wall of the outer pressure ring (7). The guide blocks (72) on the outermost pressure ring (7) are slidably installed in the guide grooves (33).

3. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 2, characterized in that, The guide block (72) is connected to the guide groove 2 (75) or the guide groove 1 (33) by an elastic element 2 (73), and the guide block (72) and the guide groove 2 (75) or the guide groove 1 (33) are provided with magnetic elements (74) with opposite magnetic properties on opposite sides.

4. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 2, characterized in that, The guide assembly (8) includes several push rods (81) and wedge seats (83). Several movable grooves (32) are provided on the outer ring of the perforation (31). The push rods (81) extend through into the movable grooves (32). The end of the push rod (81) is provided with a wedge seat (83). The bottom of the wedge seat (83) is in contact with the top of several pressure rings (7). The push rod (81) is connected to the adjusting rod (10) through the connector (82). The adjustment rod (10) moves to make the push rod (81) move synchronously. The line formed in the longitudinal direction of the inclined bottom end of the wedge seat (83) coincides with the line formed in the longitudinal direction of the end face of the adjusting rod (10). The pressing assembly (9) includes several telescopic plates (91). An installation cavity (411) is provided in the punch (41). The telescopic plates (91) are installed in the installation cavity (411) laterally. The telescopic plates (91) are in contact with the inclined surface of the wedge seat (83).

5. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 4, characterized in that, A synchronous moving assembly two (95) is installed inside the mounting cavity (411). Several telescopic plates (91) are connected to the synchronous moving assembly two (95). An elastic element three (96) is connected between the end face of the telescopic plate (91) and the inner wall of the mounting cavity (411). A connecting plate (93) is provided on the telescopic plate (91) through a support plate (92). Ball bearings (94) are symmetrically installed on the connecting plate (93). The longitudinal projection of the ball bearings (94) is located on the outer end face of the telescopic plate (91). On the outside, movable inclined plates (84) are symmetrically slidably installed on both sides of the wedge-shaped seat (83), and fixed inclined plates (85) are symmetrically fixed in the movable groove (32). The fixed inclined plates (85) are located below the movable inclined plates (84), and the bottom end of the movable inclined plates (84) is in contact with the inclined surface of the top end of the fixed inclined plates (85). The ball (94) moves along the trajectory formed by the movable inclined plates (84) and the fixed inclined plates (85). Several storage cavities (412) are opened around the punch (41).

6. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 1, characterized in that, The support member (6) includes a fixed cylinder (61) and a top rod (63). The fixed cylinder (61) is fixed to the top of the support plate (5). A piston rod (62) is longitudinally and movably installed inside the fixed cylinder (61). A top rod (63) is provided at the top of the piston rod (62). The top rod (63) is used to support the material sheet. An inflation valve (64) is installed on the side of the fixed cylinder (61). The inflation valve (64) is connected to an external inflation unit. The inflation valve (64) is a one-way valve.

7. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 6, characterized in that, The fixed cylinder (61) is provided with a telescopic groove (611) and an exhaust hole (612). A wedge block (65) is movably installed in the telescopic groove (611). The wedge block (65) is located below the piston rod (62) and its inclined surface faces upward. A linkage plate (651) is provided at one end of the wedge block (65) in the telescopic groove (611). An elastic element (652) is connected between the linkage plate (651) and the telescopic groove (611). A sealing plate (66) is movably installed at the exhaust hole (612). A step is provided at the exhaust hole (612) to prevent the sealing plate (66) from moving outward. Four sets of guide frames (613) corresponding to the four corners of the sealing plate (66) are also provided. A synchronous moving component (67) for connecting the linkage plate (651) and the sealing plate (66) is also installed in the exhaust hole (612).

8. The continuous stamping die for producing automotive seat slide rail sheet material according to claim 1, characterized in that, The pressure plate (3) is provided with a cutting knife (141) at the cutting position (14), and the pressure plate (3) and the die holder (2) are provided with a stamping die (161) at the stamping position (16).

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