Full-automatic production line for shock-absorbing and sound-damping sheet

Abstract

This invention relates to the field of vibration damping and sound-absorbing sheet processing, and more particularly to a fully automated production line for vibration damping and sound-absorbing sheets. The production line includes a sheet feeding device, a stamping device, a straightening device, and a bending device. The sheet feeding device stores the sheet material, transfers it to the stamping device, and moves the sheet material horizontally within the stamping device. The stamping device stamps the sheet material to obtain a blank and transfers the blank to the straightening device. The straightening device detects the flatness of the blank, straightens any bent blanks, and transfers the blank to the bending device. The bending device bends the blank and then sends it out as a finished product. This fully automated production line for vibration damping and sound-absorbing sheets can automatically complete the sheet feeding, stamping, straightening, bending, and blank transfer between processes during the production of vibration damping and sound-absorbing sheets, achieving a high degree of automation.

Description

Technical Field

[0001] This invention relates to the field of vibration damping and noise reduction sheet processing technology, and in particular to a fully automated production line for vibration damping and noise reduction sheets. Background Technology

[0002] Automotive brake pads consist of a steel backing and a friction block mounted together. A damping and sound-absorbing diaphragm is also installed between the steel backing and the friction block to absorb the vibrations generated by the friction block during operation.

[0003] To allow the vibration damping and sound-absorbing plates to be installed between the steel backing and the friction block, mounting structures, such as holes and bending structures, need to be machined into the plates. Vibration damping and sound-absorbing plates are made of composite materials, and their production process generally involves punching blanks from the sheet metal and bending the blanks, requiring stamping and bending equipment. In existing technologies, stamping and bending are performed manually by workers on corresponding equipment. Furthermore, the blanks need to be stored and transferred between different processes, resulting in low overall automation in the production of vibration damping and sound-absorbing plates. Due to the high degree of manual intervention, production efficiency is low, and product quality is inconsistent.

[0004] Therefore, it is necessary to improve existing technologies to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a fully automated production line for vibration damping and noise reduction sheets, which aims to solve the problem of low overall automation in the production of vibration damping and noise reduction sheets in the prior art.

[0006] To achieve the above objectives, the present invention provides a fully automated production line for vibration damping and sound absorption sheets, comprising a sheet feeding device, a stamping device, a straightening device, and a bending device; the sheet feeding device is used to store sheet metal, transfer sheet metal to the stamping device, and move sheet metal horizontally within the stamping device; the stamping device is used to stamp the sheet metal to obtain a blank, and transfer the blank to the straightening device; the straightening device is used to detect the flatness of the blank, straighten any bent blanks to make them straight, and also to transfer the blank to the bending device; the bending device is used to bend the blank and then send it out as a finished product.

[0007] Furthermore, the sheet metal feeding equipment includes a feeding frame, a feeding platform slidably connected to the feeding frame, a sheet metal frame located beside the feeding platform, and a sheet metal transfer mechanism mounted above the feeding platform. The sheet metal transfer mechanism is used to transfer the sheet metal from the sheet metal frame to the feeding platform. The feeding platform is equipped with multiple clamping and pushing mechanisms. The clamping and pushing mechanisms slide on the feeding platform in directions close to and away from the stamping equipment. The end of the clamping and pushing mechanism close to the stamping equipment is equipped with a chuck for clamping the sheet metal. The sliding direction of the feeding platform on the feeding frame is perpendicular to the sliding direction of the clamping and pushing mechanisms.

[0008] Furthermore, the stamping equipment includes a stamping press, a lower die holder mounted on the stamping press, a lower die connected above the lower die holder, an upper die holder mounted on the stamping press and driven to rise and fall by the stamping press, an upper die connected below the upper die holder, and a material receiving and conveying mechanism slidably connected to the stamping press; the upper die is a concave die with a cavity, the lower die is a convex die, and a demolding ejector block that slides up and down is provided in the cavity of the upper die, the demolding ejector block communicating with the top surface of the upper die; a demolding mechanism is connected above the upper die holder, the demolding mechanism including a demolding push rod, the demolding push rod being able to After passing through the upper mold frame, the ejector pin pushes the material from top to bottom against the ejector block. During the stamping operation, before each stamping, the ejector pin rises and moves away from the ejector block inside the upper mold, allowing the ejector block to slide upwards. After each stamping, the ejector pin descends and pushes the ejector block downwards to allow the blank in the mold cavity to fall out of the mold cavity. The receiving and conveying mechanism can slide to a position partially below the upper mold to receive the blank falling out of the mold cavity. The receiving and conveying mechanism can also slide to a position completely below the upper mold and connect with the straightening equipment to transfer the blank to the straightening equipment.

[0009] Furthermore, the stamping equipment also includes an automatic die-mounting device, which is used to transfer the die to the stamping machine and to retrieve and store the die after it has been removed from the stamping machine. The stamping machine also includes a stamping power source and a stamping slide that is driven to rise and fall by the stamping power source. The upper die holder is connected to the stamping slide, and an adjustment mechanism for adjusting the height of the stamping slide is provided between the stamping power source and the stamping slide. Both the upper die holder and the lower die holder are equipped with a die-locking structure. A die detection mechanism is provided in the upper die holder, which is triggered when the upper die holder contacts the upper die. When installing the die, the automatic die-mounting device places the die in the lower die holder, the stamping power source moves to the bottom dead center, and then the adjustment mechanism lowers the stamping slide. When the upper die holder contacts the upper die, the die detection mechanism is triggered, and the die-locking structures in the upper and lower die holders are activated and lock the upper and lower dies respectively.

[0010] Furthermore, the upper mold frame includes an upper mounting plate, and the mold detection mechanism includes two movable blocks that slide vertically on the upper mounting plate, a transmission block that slides horizontally on the upper mounting plate, and a first positioning detection element that can be triggered by the transmission block; the two movable blocks are arranged along the width direction of the mold and are located on both sides of the demolding push rod, and each movable block has a hook-shaped structure at its top, with a bottoming plane below the hook-shaped structure. A spring is provided between the movable block and the upper mounting plate to make the movable block tend to protrude downwards from the upper mounting plate; the transmission block is bifurcated and includes two bifurcated sections and a single-headed section. The two bifurcated sections are connected to the two movable blocks respectively, and the single-headed section is used to trigger the first positioning detection element. Each bifurcated section has a limit post at its end, and the limit post slides between the hook-shaped structure and the bottoming plane; when the two movable blocks rise simultaneously and the hook-shaped structure disengages from the limit post, the two bottoming planes simultaneously abut against the two bifurcated sections, and the transmission block slides to the triggering position that can trigger the first positioning detection element; when the limit post is located inside the hook-shaped structure, the transmission block moves away from the triggering position.

[0011] Furthermore, the straightening equipment includes a receiving conveyor belt, a vision inspection device, a first transfer mechanism, a qualified product conveyor belt, a straightening conveyor belt, a straightening device, a second transfer mechanism, and a temporary storage table. The receiving conveyor belt is used to receive the blanks transferred from the stamping equipment. The vision inspection device is located beside the conveying path of the receiving conveyor belt to detect whether the blanks need straightening. The qualified product conveyor belt and the straightening conveyor belt are arranged side by side. Straightening conveyor belts are set at both ends of the straightening device. The first transfer mechanism is located at the end of the receiving conveyor belt to transfer the blanks to the qualified product conveyor belt or the straightening conveyor belt. The second transfer mechanism is located between the end of the qualified product conveyor belt and the end of the straightening conveyor belt to transfer the blanks on the qualified product conveyor belt and the straightening conveyor belt to the temporary storage table.

[0012] Furthermore, the straightening equipment also includes a stacking and transfer mechanism mounted above the temporary storage platform. The temporary storage platform is equipped with a stacking position and a temporary storage position. The second transfer mechanism can stack the billets at the stacking position. The stacking and transfer mechanism can transfer the entire stack of billets from the stacking position to the temporary storage position. The stacking and transfer mechanism can also transfer the entire stack of billets from the temporary storage position to the bending equipment. A bending equipment is installed on each side of the straightening equipment.

[0013] Furthermore, the bending equipment includes a billet frame, a feeding device, a positioning device, two transfer devices, two bending devices, and two discharging devices. The positioning device serves as a boundary, with one transfer device, bending device, and discharging device located on one side of the positioning device, and the other transfer device, bending device, and discharging device located on the other side. The billet frame is used to receive stacks of billets. The feeding device is used to transfer individual billets from the billet frame to the positioning device. The positioning device is used to horizontally position the billets. The transfer devices are used to remove the billets from the positioning device, transfer the billets to the bending devices located on the same side as the transfer devices, rotate the billets 90° and then 180° on a horizontal plane so that both ends of the billets face the bending devices respectively, and place the billets on the discharging devices located on the same side as the transfer devices. The bending devices are used to bend the two ends of the billets sequentially. The discharging devices are used to receive finished products from the transfer devices and to discharge finished products.

[0014] Furthermore, the positioning device includes a placement position, a lateral positioning mechanism, and a longitudinal positioning mechanism. The lateral positioning mechanism includes two sets of lateral pushing components located on both sides of the placement position and capable of approaching each other laterally. When the two sets of lateral pushing components approach each other, they perform lateral positioning of the billet. The longitudinal positioning mechanism includes a longitudinal blocking component and a longitudinal pushing component. The longitudinal blocking component can abut the billet from the front of the placement position, and the longitudinal pushing component can slide from back to front to push the billet toward the longitudinal blocking component. Each lateral pushing component is provided with a lateral pushing block that is driven to slide laterally relative to the placement position. The lateral pushing block is connected to a floating slider, which contacts the billet with the help of the floating slider. The floating slider can slide longitudinally relative to the lateral pushing block. A return spring is provided between the floating slider and the lateral pushing block to reset the floating slider in the longitudinal direction. The longitudinal pushing component is also provided with a second positioning detection element. When the billet is clamped during the process of the longitudinal pushing component approaching the longitudinal blocking component, the second positioning detection element is triggered as the longitudinal pushing component continues to approach the longitudinal blocking component. When the second positioning detection element is triggered, the two sets of lateral pushing components perform an action of first moving away from each other by a certain distance and then moving closer to each other.

[0015] Furthermore, the transverse push block is provided with a sliding groove with its opening facing the placement position and extending longitudinally. The floating slider is strip-shaped and slidably connected in the sliding groove. The transverse push block is provided with an auxiliary sliding groove with its opening facing vertically. The auxiliary sliding groove is connected to the sliding groove via a long through hole. The floating slider is connected to an auxiliary slider that passes through the long through hole and extends into the auxiliary sliding groove. The auxiliary slider slides longitudinally in the long through hole. The auxiliary slider is connected to an auxiliary pulley. The axis of the auxiliary pulley extends vertically. The auxiliary pulley makes rolling contact with the auxiliary sliding groove. The two ends of the return spring abut against the groove wall of the auxiliary sliding groove and the auxiliary slider, respectively. The transverse push block is also provided with two mounting holes with their openings facing vertically. The two mounting holes are located in front of and behind the auxiliary sliding groove, respectively. The mounting holes are connected to the sliding groove via notches. A resisting pulley is installed in the mounting holes. The axis of the resisting pulley extends vertically. A part of the resisting pulley extends into the sliding groove from the notch. The part of the resisting pulley that extends into the sliding groove can make rolling contact with the floating slider.

[0016] The present invention provides a fully automated production line for vibration damping and sound absorbing sheets, which can automatically complete the sheet feeding, stamping, straightening, bending and blank transfer between various processes in the production of vibration damping and sound absorbing sheets. The high degree of automation makes the entire production process less manual, thus achieving high production efficiency and ensuring product quality. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the fully automated production line for vibration damping and noise reduction sheets of the present invention;

[0018] Figure 2 This is a top view of the fully automated production line for vibration damping and noise reduction sheets of the present invention;

[0019] Figure 3 This is a 3D structural diagram of the sheet metal feeding equipment;

[0020] Figure 4 It is a three-dimensional structural diagram of the loading platform and the clamping and pushing mechanism;

[0021] Figure 5 It is a 3D structural diagram of the stamping equipment;

[0022] Figure 6 This is an anatomical view of the mold;

[0023] Figure 7 It is a three-dimensional structural diagram of some components in the stamping equipment;

[0024] Figure 8 It is a three-dimensional structure of the upper mold frame. Figure 1 ;

[0025] Figure 9 It is a three-dimensional structure of the upper mold frame. Figure 2 ;

[0026] Figure 10 This is a 3D structural diagram showing the upper mold frame concealing the upper mounting plate.

[0027] Figure 11 This is a 3D structural diagram of some components in the mold inspection mechanism;

[0028] Figure 12 This is a three-dimensional structural diagram of the straightening equipment;

[0029] Figure 13 It is a three-dimensional structural diagram of some components in the straightening equipment;

[0030] Figure 14 It is a three-dimensional structural diagram of straightening and bending equipment;

[0031] Figure 15 It is a 3D structural diagram of the bending equipment;

[0032] Figure 16 This is a top view of some components in the bending equipment;

[0033] Figure 17 It is a three-dimensional structural diagram of some components in the bending equipment;

[0034] Figure 18 This is a three-dimensional structural diagram of the transfer device;

[0035] Figure 19 It is a three-dimensional structure of the positioning device. Figure 1 ;

[0036] Figure 20 It is a three-dimensional structure of the positioning device. Figure 2 ;

[0037] Figure 21 This is a 3D structural diagram of the transverse pusher component;

[0038] Figure 22 This is an exploded structure diagram of the transverse push component;

[0039] Figure 23 It is a three-dimensional sectional view of the horizontal push block.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Sheet material feeding equipment; 11. Feeding frame; 12. Feeding platform; 13. Sheet material frame; 14. Sheet material transfer mechanism; 15. Clamping and pushing mechanism; 151. Chuck;

[0042] 2. Stamping equipment; 21. Stamping machine; 22. Lower die holder; 23. Lower die; 24. Upper die holder; 241. Mold locking structure; 242. Mold detection mechanism; 2421. Movable block; 2422. Transmission block; 2423. First positioning detection element; 2424. Hook-shaped structure; 2425. Abutting plane; 2426. Limiting post; 243. Upper mounting plate; 25. Upper die; 251. Mold cavity; 252. Demolding ejector block; 26. Material receiving and conveying mechanism; 27. Demolding mechanism; 271. Demolding push rod; 28. Automatic die mounting device; 281. Mold storage rack; 282. Picking and releasing arm; 29. ​​Stamping slide block; 291. Adjustment mechanism; 210. Scrap receiving and conveying device; 211. Guillotine station; 212. Edge material guide plate; 213. Scrap frame;

[0043] 3. Straightening equipment; 31. Receiving conveyor belt; 32. Vision inspection device; 33. First transfer mechanism; 34. Qualified product conveyor belt; 35. Straightening conveyor belt; 36. Straightening device; 37. Second transfer mechanism; 38. Temporary storage platform; 381. Stacking position; 382. Temporary storage position; 39. Stacking transfer mechanism;

[0044] 4. Bending equipment; 41. Blank frame; 42. Feeding device; 43. Positioning device; 431. Placement position; 432. Lateral positioning mechanism; 4320. Lateral push assembly; 4321. Lateral push block; 4322. Floating slider; 4323. Return spring; 4324. Sliding groove; 4325. Auxiliary sliding groove; 4326. Through hole; 4327. Auxiliary slider; 4328. Auxiliary pulley; 4329. Mounting hole; 43210. Notch; 43 211. Top pulley; 433. Longitudinal positioning mechanism; 4331. Longitudinal push assembly; 4332. Longitudinal blocking assembly; 4333. Second positioning detection element; 4334. Roller; 44. Transfer device; 441. Rotary clamp; 442. Active rotating head; 443. Passive rotating head; 444. Clamping seat; 445. Rotary motor; 446. Transmission belt; 447. Lifting frame; 448. Lifting cylinder; 45. Bending device; 46. Discharge device. Detailed Implementation

[0045] The present invention will be described in detail below with reference to specific embodiments.

[0046] In this invention, unless otherwise explicitly specified and limited, terms such as "set in," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The directional terms appearing in this invention are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the orientation of this invention changes, the orientation of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute spatial limitation on the characteristics of the features and the relationships between them, but only a relative limitation.

[0047] This embodiment provides a fully automated production line for vibration damping and noise reduction sheets, such as... Figure 1 and Figure 2 As shown, it includes a sheet metal feeding device 1, a stamping device 2, a straightening device 3, and a bending device 4.

[0048] The sheet material feeding device 1 is used to store sheet materials, transfer sheet materials to the stamping device 2, and move the sheet materials horizontally within the stamping device 2. The sheet material feeding device 1 is used to store a large number of composite material sheet materials, and then transfer the sheet materials to the stamping device 2. One sheet material can be stamped into multiple blanks. Therefore, the sheet material feeding device 1 also has the function of moving the sheet materials horizontally, so that different positions of the sheet materials are sequentially located at the stamping positions of the stamping machine 21.

[0049] The stamping equipment 2 is used to stamp the sheet metal to obtain a blank and transfer the blank to the straightening equipment 3. After each blank is stamped out, the stamping equipment 2 sends the blank to the straightening equipment 3.

[0050] The straightening device 3 is used to detect the flatness of the billet, straighten the curved billet to make it straight, and also to transfer the billet to the bending device 4. Some billets may be warped, and the warped billets need to be straightened before bending. If they are not straightened in advance, they will be difficult to straighten after bending. Therefore, this embodiment sets up the straightening device 3. The straightening device 3 detects each billet and straightens those that are warped.

[0051] The bending equipment 4 is used to bend the blank and then send it out as a finished product. Both sides of the shock-absorbing and sound-absorbing sheet are provided with bending structures. The bending equipment 4 is used to bend both sides of the blank.

[0052] Based on the above structural design, this fully automated production line for vibration damping and sound absorption sheets can automatically complete the sheet feeding, stamping, straightening, bending, and blank transfer between various processes during the production of vibration damping and sound absorption sheets, with a high degree of automation.

[0053] In this embodiment, as Figure 3 and Figure 4 As shown, the sheet metal feeding device 1 includes a feeding frame 11, a feeding platform 12 slidably connected to the feeding frame 11, a sheet metal frame 13 located beside the feeding platform 12, and a sheet metal transfer mechanism 14 mounted above the feeding platform 12. The sheet metal transfer mechanism 14 is used to transfer the sheet metal from the sheet metal frame 13 to the feeding platform 12. The feeding platform 12 is provided with a plurality of clamping and pushing mechanisms 15. The clamping and pushing mechanisms 15 slide on the feeding platform 12 in the direction of approaching and moving away from the stamping equipment 2. The end of the clamping and pushing mechanism 15 near the stamping equipment 2 is provided with a chuck 151 for clamping the sheet metal. The sliding direction of the feeding platform 12 on the feeding frame 11 is perpendicular to the sliding direction of the clamping and pushing mechanisms 15. Based on the above structural configuration, after the sheet metal transfer mechanism 14 transfers the sheet metal from the sheet metal frame 13 to the loading platform 12, the clamping and pushing mechanism 15 approaches the sheet metal and clamps its edge. Preferably, the surface of the loading platform 12 is provided with a blocking block that can be raised and lowered to protrude from the loading platform 12. After the blocking block is raised, it can block the sheet metal. When the clamping and pushing mechanism 15 clamps the sheet metal, it first approaches the sheet metal and then pushes the sheet metal until the sheet metal is blocked by the blocking block and its position is fixed. Then the clamping and pushing mechanism 15 clamps the edge of the sheet metal. After that, the blocking block descends and no longer blocks the sheet metal from being fed into the stamping machine 21. Then the clamping and pushing mechanism 15 clamps the sheet metal and slides it towards the stamping equipment 2, so that part of the sheet metal is located in the stamping position of the stamping machine 21. After the stamping of one blank is completed, the entire loading platform 12 slides, so that another position of the sheet metal is located in the stamping position. After the stamping of one row of blanks is completed, the clamping and pushing mechanism 15 clamps the sheet metal and slides it towards the stamping equipment 2 for another row of blanks to be stamped. Through the above structure and operation, multiple blanks can be punched out sequentially in a square array on the sheet metal without human intervention, resulting in a high degree of automation.

[0054] It is easy to understand that a translation drive mechanism, such as a lead screw and nut pair, is provided between the loading platform 12 and the loading frame 11; a translation drive mechanism, such as a lead screw and nut pair, is provided between the clamping and pushing mechanism 15 and the loading platform 12; the translation drive mechanism is a common mechanism in the mechanical field, so its specific structure will not be described in detail.

[0055] In this embodiment, as Figures 5 to 11As shown, the stamping equipment 2 includes a stamping machine 21, a lower die holder 22 disposed on the stamping machine 21, a lower die 23 connected above the lower die holder 22, an upper die holder 24 disposed on the stamping machine 21 and driven to rise and fall by the stamping machine 21, an upper die 25 connected below the upper die holder 24, and a material receiving and conveying mechanism 26 slidably connected to the stamping machine 21. The upper die 25 is a concave die with a mold cavity 251, and the lower die 23 is a convex die. A demolding ejector block 252 that slides up and down is disposed in the mold cavity 251 of the upper die 25, and the demolding ejector block 252 is connected to the top surface of the upper die 25. In this structure, the blank will remain in the upper die 25 during stamping. A demolding mechanism 27 is connected above the upper die holder 24. The demolding mechanism 27 includes a demolding push rod 271, which can pass through the upper die holder 24 and push against the demolding ejector block 252 from top to bottom. During the stamping operation, before each stamping, the ejector pin 271 rises, moving away from the ejector block 252 inside the upper die 25, allowing the ejector block 252 to slide upwards. After each stamping, the ejector pin 271 descends, pushing the ejector block 252 downwards to allow the blank in the die cavity 251 to fall out. This eliminates the need for push springs on each die and for manual removal of the product, simplifying the structure of all dies. The receiving and conveying mechanism 26 can slide partially below the upper die 25 to receive the blank falling from the die cavity 251, and can also slide completely away from below the upper die 25 and dock with the straightening device 3 to transfer the blank to the straightening device 3.

[0056] It is easy to understand that a translation drive mechanism, such as a cylinder, is provided between the stamping machine 21 and the material receiving and conveying mechanism 26. This is a common mechanism in the mechanical field, so its specific structure will not be described in detail.

[0057] Preferably, such as Figure 7As shown, a scrap receiving and conveying device 210 is provided below the lower mold frame 22 to receive scrap falling from the lower mold 23 and then convey it to the scrap box 213. Meanwhile, an edge material guillotine (obscured and not shown) is provided behind the upper mold frame 24, a guillotine station 211 is provided behind the lower mold frame 22, and an edge material guide plate 212 is provided behind the guillotine station 211. The scrap receiving and conveying device 210 is located below the edge material guide plate 212. As mentioned above, under the drive of the sheet material feeding device 1, multiple blanks are punched out sequentially in a square array, leaving edge material after the blanks are punched out. When the loading platform 12 moves the sheet metal horizontally, the edge material that goes too deep into the stamping machine 21 may collide with the stamping machine 21, affecting production. Therefore, this embodiment also provides an edge material guillotine and a guillotine platform 211 for cutting off the edge material. During each stamping die closing, the edge material guillotine and the guillotine platform 211 close to cut off the edge material that goes too deep. After the edge material is cut off, it will fall into the scrap receiving and conveying device 210 under the guidance of the edge material guide plate 212 and is also conveyed to the scrap frame 213. At the same time, a scrap frame 213 is also provided on the side of the stamping machine 21. The last scrap material of each sheet metal is moved horizontally by the loading platform 12 to the scrap frame 213 on the side and then put down. The last scrap material also falls into the scrap frame 213.

[0058] In this embodiment, the stamping equipment 2 further includes an automatic die-loading device 28, which is used to transfer the die to the stamping machine 21 and to retrieve and store the die after it has been removed from the stamping machine 21. The automatic die-loading device 28 includes a die storage rack 281 and a pick-and-place arm 282 connected to the die storage rack 281. The pick-and-place end of the pick-and-place arm 282 has three sliding degrees of freedom in the lateral, longitudinal, and vertical directions, and one rotational degree of freedom about a vertical axis. Three sliding degrees of freedom and one rotational degree of freedom ensure that the pick-up and put-down end of the pick-up and put-down arm 282 can slide to any position of the mold storage rack 281 to pick up and put down the mold. In this embodiment, due to equipment layout requirements, the automatic mold loading device 28 is set on the side of the press 21. Therefore, the pick-up and put-down arm 282 needs to be able to rotate in order to put the mold into the press 21 from the side. The three sliding degrees of freedom are realized by translation drive mechanisms in the horizontal, vertical and vertical directions, respectively, while the one rotational degree of freedom is realized by rotation drive mechanism. Translation drive mechanism and rotation drive mechanism are common mechanisms in the mechanical field, so their specific structures will not be described in detail.

[0059] The stamping press 21 also includes a stamping power source and a stamping slide 29 driven to rise and fall by the stamping power source. The stamping power source generally adopts a crank-rocker mechanism. The upper die holder 24 is connected to the stamping slide 29. An adjustment mechanism 291 for adjusting the height of the stamping slide 29 is provided between the stamping power source and the stamping slide 29. The adjustment mechanism 291 is existing technology and typically includes a ball end screw located between the stamping slide 29 and the crank-rocker mechanism. By rotating the ball end screw, the height of the stamping slide 29 relative to the bottom dead center of the crank-rocker mechanism can be adjusted through the threaded connection pair. Both the upper die holder 24 and the lower die holder 22 are provided with a mold locking structure 241. Since different dies have different heights, and the position of the bottom dead center of the crank-rocker mechanism is fixed, the height of the upper die holder 24 when the crank-rocker mechanism is at the bottom dead center must be changed by using the adjustment mechanism 291 to ensure that the die can work normally. This is a problem that must be solved when installing the die. In this embodiment, the mold replacement is also performed automatically, so the adjustment action of the adjustment mechanism 291 also needs to be performed automatically.

[0060] Therefore, in this embodiment, a mold detection mechanism 242 is provided in the upper mold frame 24. The mold detection mechanism 242 is triggered when the upper mold frame 24 contacts the upper mold 25. When installing the mold, the automatic mold mounting device 28 places the mold in the lower mold frame 22, the stamping power source moves to the bottom dead center, and then the adjusting mechanism 291 causes the stamping slide 29 to descend. When the upper mold frame 24 contacts the upper mold 25, the mold detection mechanism 242 is triggered, and the mold locking structure 241 in the upper mold frame 24 and the lower mold frame 22 is activated and locks the upper mold 25 and the lower mold 23 respectively.

[0061] Preferably, the upper mold frame 24 includes an upper mounting plate 243, and the mold detection mechanism 242 includes two movable blocks 2421 that slide vertically on the upper mounting plate 243, a transmission block 2422 that slides horizontally on the upper mounting plate 243, and a first positioning detection element 2423 that can be triggered by the transmission block 2422; the two movable blocks 2421 are arranged along the width direction of the mold and are respectively located on both sides of the demolding push rod 271, and each movable block 2421 has a hook-shaped structure 2424 at its top, and a bottom surface 2425 below the hook-shaped structure 2424; a spring is provided between the movable block 2421 and the upper mounting plate 243 to make the movable block 2421 tend to protrude downward from the upper mounting plate 243; the transmission block 2421... 422 is forked and includes two forked segments and a single-headed segment. The two forked segments are connected to two movable blocks 2421 respectively. The single-headed segment is used to trigger the first positioning detection element 2423. Each forked segment has a limit post 2426 at its end. The limit post 2426 slides between the hook-shaped structure 2424 and the abutting plane 2425. When the two movable blocks 2421 rise simultaneously and the hook-shaped structure 2424 disengages from the limit post 2426, the two abutting planes 2425 abut against the two forked segments simultaneously. The transmission block 2422 slides to the trigger position that can trigger the first positioning detection element 2423. When the limit post 2426 is located inside the hook-shaped structure 2424, the transmission block 2422 moves away from the trigger position. Based on the above structural configuration, before the upper mold frame 24 contacts the upper mold 25, the spring causes the movable block 2421 to move downwards and protrude from the upper mounting plate 243. As the upper mold frame 24 continues to descend, causing the movable block 2421 to contact the upper mold 25, the movable block 2421 is continuously pushed upwards, pushing the transmission block 2422 towards the trigger position. When the transmission block 2422 reaches the trigger position, the first positioning detection element 2423 is triggered and sends a trigger signal to the production line controller. The controller then activates the mold clamping structure 241, clamping the mold. After the mold is removed, the movable block 2421 is pushed downwards again by the spring, awaiting the installation of the next mold. The first positioning detection element 2423 can be a contact sensor, distance sensor, or through-beam sensor, used to detect whether the transmission block 2422 has reached the set position. Setting the transmission block 2422 in a bifurcated shape, with the two bifurcated sections arranged separately on both sides, provides installation space for the demolding mechanism 27. The hook-shaped structure 2424 can pull the transmission block 2422 back away from the trigger position. Through the above structure, it can be ensured that the mold locking structure 241 only moves after the upper mold frame 24 has moved into place, ensuring the success rate of mold locking, and no worker intervention is required during the process, resulting in a high degree of automation.When the upper mold 25 disengages from the upper mounting plate 243, the movable block 2421 returns to its original position under the action of the spring. During the process of the movable block 2421 returning to its original position, the hook structure 2424 hooks back the limiting post 2426, causing the transmission block 2422 to also return to its original position. A more preferred method is to provide a reset elastic element between the transmission block 2422 and the upper mounting plate 243. This reset elastic element causes the transmission block 2422 to tend to return to its original position. In practical applications, the first positioning detection element 2423 is preferably a press-type detection element. This type of press-type detection element has a built-in springback function. Therefore, the springback of the press-type detection element can also cause the transmission block 2422 to move in the direction of resetting and cause the limiting post 2426 to re-enter the hook structure 2424.

[0062] The mold-locking structure 241 includes a positioning ejector pin and a mold clamping device. The positioning ejector pin can be driven to extend from the mold frame and insert into the positioning hole of the mold to horizontally position the mold. The mold clamping device is used to clamp the mold on the mold frame after approaching the mold in the horizontal direction to vertically position the mold. Both the upper mold frame 24 and the lower mold frame 22 are provided with the mold-locking structure 241.

[0063] In this embodiment, as Figures 12 to 14 As shown, the straightening device 3 includes a receiving conveyor belt 31, a vision inspection device 32, a first transfer mechanism 33, a qualified product conveyor belt 34, a straightening conveyor belt 35, a straightening device 36, a second transfer mechanism 37, and a temporary storage table 38. The receiving conveyor belt 31 is used to receive the blanks transferred from the stamping equipment 2. The vision inspection device 32 is located beside the conveying path of the receiving conveyor belt 31 to detect whether the blanks need to be straightened. The qualified product conveyor belt 34 and the straightening conveyor belt 35 are arranged side by side. The straightening device 36 has straightening conveyor belts 35 at both ends. The first transfer mechanism 33 is located at the end of the receiving conveyor belt 31 to transfer the blanks to the qualified product conveyor belt 34 or the straightening conveyor belt 35. The second transfer mechanism 37 is located between the end of the qualified product conveyor belt 34 and the end of the straightening conveyor belt 35 to transfer the blanks on the qualified product conveyor belt 34 and the straightening conveyor belt 35 to the temporary storage table 38. Based on the above structural configuration, the flatness of the billet is checked during transmission on the receiving conveyor belt 31. If warping is found, it is transferred by the first transfer mechanism 33 to the straightening conveyor belt 35, which then feeds the billet into the straightening device 36 for straightening. If there is no warping, it is transferred by the first transfer mechanism 33 to the qualified product conveyor belt 34 for normal transmission. When the billet reaches the end of both the qualified product conveyor belt 34 and the straightening conveyor belt 35, it is transferred by the second transfer mechanism 37 to the temporary storage table 38. The pick-and-place ends of both the first transfer mechanism 33 and the second transfer mechanism 37 can be raised, lowered, and rotated to meet the requirements of a one-to-two pick-and-place and transfer operation. The pick-and-place ends are generally suction cups. The straightening device 36 is a prior art device for straightening composite material sheets, where the sheet is straightened simultaneously during internal transmission; its specific structure will not be described in detail.

[0064] In this embodiment, the straightening device 3 also includes a stacking transfer mechanism 39 mounted above the temporary storage platform 38. The temporary storage platform 38 is provided with a stacking position 381 and a temporary storage position 382. The second transfer mechanism 37 can stack the billet at the stacking position 381, and the stacking transfer mechanism 39 can transfer the entire stack of billet from the stacking position 381 to the temporary storage position 382. The stacking transfer mechanism 39 can also transfer the entire stack of billet from the temporary storage position 382 to the bending device 4. A bending device 4 is provided on each side of the straightening device 3. In actual production, the stamping operation is faster than the bending operation. To compensate for the difference in operating speed, this embodiment uses one stamping machine 21 paired with two bending devices 4. At the same time, as shown below, each bending device 4 is equipped with two bending devices 45 (or more). With one stamping machine 21 driving multiple bending devices 45, the overcapacity of the stamping machine 21 can be avoided. Meanwhile, in order to avoid frequent back-and-forth transfer of billets, in this embodiment, the billets are stacked and then transferred from the straightening device 3 to the bending device 4. The stacked billets are picked up as a whole and temporarily stored in the temporary storage position 382. When the billets in the bending device 4 are almost used up, the whole stack of billets is transferred from the temporary storage position 382 to the bending device 4. The whole process of billet transfer is simple, orderly and highly automated.

[0065] In this embodiment, as Figures 15 to 23As shown, the bending equipment 4 includes a billet frame 41, a feeding device 42, a positioning device 43, two transfer devices 44, two bending devices 45, and two discharge devices 46. The positioning device 43 serves as a boundary, with one transfer device 44, bending device 45, and discharge device 46 located on one side of the positioning device 43, and the other transfer device 44, bending device 45, and discharge device 46 located on the other side. The billet frame 41 is used to receive stacks of billets. The feeding device 42 is used to transfer single billets from the billet frame 41 to the positioning device 43. The positioning device 43 is used to horizontally position the billets. Positioning includes both horizontal and vertical orientations; accurate positioning is crucial for ensuring accurate subsequent bending. The transfer device 44 removes the blank from the positioning device 43, transfers it to the bending device 45 on the same side, rotates the blank 90° and then 180° on a horizontal plane so that both ends face the bending device 45, and places the blank on the discharge device 46 on the same side. The bending device 45 bends both ends of the blank sequentially. The discharge device 46 receives the finished product from the transfer device 44 and discharges it. Based on this structure, the bending equipment 4 has two symmetrical sets of transfer devices 44, bending devices 45, and discharge devices 46, allowing simultaneous processing of two blanks, resulting in higher production efficiency. The entire machine integrates feeding, positioning, transfer, bending, and discharge functions, achieving fully automated processing from blank receipt and storage to finished product output, with a high degree of automation.

[0066] It should be noted that the bending device 45 is existing technology. It is used to bend the ends of the blank. When the ends of the blank are inserted into the bending opening of the bending device 45, the bending device 45 performs the bending operation. By inserting both ends of the blank into the bending opening in sequence, the bending of both ends of the blank is completed.

[0067] like Figure 18As shown, the transfer device 44 itself is slidable. For example, a translation drive mechanism, such as a lead screw and nut pair, is provided between the transfer device 44 and the bending device 4. The transfer device 44 includes a rotating clamp 441 that can slide vertically and in a direction close to the positioning device 43. The rotating clamp 441 is used to clamp the blank. The rotating clamp 441 includes an active rotating head 442 located below and capable of active rotation, and a passive rotating head 443 located above and capable of free rotation. The passive rotating head 443 can descend to press the blank against the active rotating head 442. The purpose of the transfer device 44 being able to slide is to allow the rotating clamp 441 to be aligned with the positioning device 43, the bending device 45, and the discharge device 46, respectively. The purpose of the rotating clamp 441 sliding vertically is to ensure that the height of the rotating clamp 441 is consistent with the height required for picking up and placing the blank. The purpose of the rotating clamp 441 sliding in a direction close to the positioning device 43 is to bring it closer to the positioning device 43, the bending device 45, and the discharge device 46 for picking up and placing operations. Preferably, the rotary clamp 441 includes a clamping base 444, a rotary motor 445, a transmission belt 446, a lifting frame 447, and a lifting cylinder 448. An active rotating head 442 is rotatably connected to the clamping base 444. The rotary motor 445 is mounted on the clamping base 444 and drives the active rotating head 442 to rotate via the transmission belt 446. The lifting frame 447 is slidably connected vertically to the clamping base 444 and is driven to rise and fall by the lifting cylinder 448. A passive rotating head 443 is rotatably connected to the lifting frame 447. Before the rotary clamp 441 clamps the billet, the lifting frame 447 rises, and the passive rotating head 443 moves away from the active rotating head 442. The rotary clamp 441 approaches the billet and rises, causing the active rotating head 442 to support the bottom of the billet. Then, the lifting frame 447 descends, and the passive rotating head 443 cooperates with the active rotating head 442 to clamp the billet. When it is necessary to rotate the billet, the rotary motor 445 drives the active rotating head 442 to rotate.

[0068] In this embodiment, as Figures 19 to 23As shown, the positioning device 43 includes a placement position 431, a transverse positioning mechanism 432, and a longitudinal positioning mechanism 433. The transverse positioning mechanism 432 includes two sets of transverse push components 4320 located on both sides of the placement position 431 and capable of approaching each other in the transverse direction. When the two sets of transverse push components 4320 approach each other, they perform transverse positioning of the billet. The longitudinal positioning mechanism 433 includes a longitudinal blocking component 4332 and a longitudinal push component 4331. The longitudinal blocking component 4332 can abut the billet from the front of the placement position 431. Specifically, the longitudinal blocking component 4332 consists of two blocking rods that can approach and move away from each other. The relative distance between the two blocking rods is adjustable to accommodate different types of billets. When the two blocking rods approach each other, they act as a block; when the two blocking rods move away from each other, they do not affect the transfer device 44's approach to the placement position 431, making it convenient for the transfer device 44 to remove the billet. The longitudinal push component 4331 can slide from back to front to push the billet toward the longitudinal blocking component 4332. Each horizontal push assembly 4320 is provided with a horizontal push block 4321 that is driven to slide horizontally relative to the placement position 431. The horizontal push block 4321 is connected to a floating slider 4322. The horizontal push block 4321 contacts the blank with the help of the floating slider 4322. The floating slider 4322 can slide vertically relative to the horizontal push block 4321. A return spring 4323 is provided between the floating slider 4322 and the horizontal push block 4321 to reset the floating slider 4322 in the vertical direction.

[0069] The positioning action of the positioning device 43 is as follows: the two horizontal pushing components 4320 approach each other until the horizontal pushing components 4320 clamp the billet and maintain the clamping; the vertical pushing component 4331 pushes the billet towards the vertical blocking component 4332. During this process, since the horizontal pushing block 4321 contacts the billet with the help of the floating slider 4322, and the floating slider 4322 can slide along the longitudinal direction, both sides of the horizontal pushing block 4321 are provided with floating sliders 4322, so both sides of the billet can slide longitudinally, making the billet relatively easy to push until the vertical pushing component 4331 and the vertical blocking component 4332 clamp the billet; at this point, the billet is accurately positioned and there is no skew in the billet. If the floating slider 4322 is not provided, the following situation may occur in actual production: after the horizontal pushing component 4320 clamps the billet, due to friction, the vertical pushing component 4331 may not be able to push the billet, or the pushing may be stuck, or the billet may be worn. This embodiment can solve the above problems.

[0070] Preferably, the longitudinal pushing assembly 4331 is further provided with a second positioning detection element 4333. When the longitudinal pushing assembly 4331 approaches the longitudinal blocking assembly 4332, after the billet is clamped, as the longitudinal pushing assembly 4331 continues to approach the longitudinal blocking assembly 4332, the second positioning detection element 4333 is triggered. At this time, the billet is accurately positioned, the longitudinal pushing assembly 4331 stops approaching, and the transfer device 44 can clamp the billet in this state. A more preferred approach is that, when the second positioning detection element 4333 is triggered, the two sets of lateral push components 4320 first move away from each other by a certain distance and then move closer together. This moving away action releases the elastic force of the return spring 4323, allowing the floating slider 4322 to reset and no longer bear the elastic force of the return spring 4323. After the floating slider 4322 resets, the two sets of lateral push components 4320 move closer together again to clamp the billet for secondary lateral positioning. The positioning accuracy is higher during the secondary positioning, and at this time, the floating slider 4322 will not provide longitudinal thrust to the billet. Furthermore, when the subsequent positioning device 43 releases the billet, the billet will not be accidentally pushed due to the reset of the floating slider 4322. Preferably, a roller 4334 is provided at the end of the longitudinal push component 4331 that contacts the billet to reduce the friction between the longitudinal push component 4331 and the billet. Preferably, one of the transverse push components 4320 is also provided with a positioning detection element. After the two transverse push components 4320 clamp the billet, the positioning detection element is triggered, and the two transverse push components 4320 stop approaching each other to avoid damaging the billet.

[0071] In this embodiment, the transverse push block 4321 is provided with a sliding groove 4324 that opens towards the placement position 431 and extends longitudinally. The floating slider 4322 is strip-shaped and slidably connected within the sliding groove 4324. The transverse push block 4321 is provided with an auxiliary sliding groove 4325 that opens vertically. The auxiliary sliding groove 4325 communicates with the sliding groove 4324 via a through hole 4326. The floating slider 4322 is connected with an auxiliary slider 4327 that passes through the through hole 4326 and extends into the auxiliary sliding groove 4325. The auxiliary slider 4327 slides longitudinally within the through hole 4326. The auxiliary slider 4327 is connected to an auxiliary pulley 4328, the axis of which extends vertically. The auxiliary pulley 4328 rolls in contact with the auxiliary groove 4325. The two ends of the return spring 4323 abut against the groove wall of the auxiliary groove 4325 and the auxiliary slider 4327, respectively. Based on the above structure, the floating slider 4322 will not fall out after being installed in the sliding groove 4324. Moreover, the rolling contact between the auxiliary pulley 4328 and the auxiliary groove 4325 can reduce friction and make the sliding resistance of the floating slider 4322 smaller. The transverse push block 4321 is also provided with two vertically facing mounting holes 4329. The two mounting holes 4329 are located in front of and behind the auxiliary slide groove 4325, respectively. The mounting holes 4329 are connected to the slide groove 4324 via notches 43210. A push pulley 43211 is installed in the mounting hole 4329. The axis of the push pulley 43211 extends vertically, and a part of the push pulley 43211 extends into the slide groove 4324 through the notches 43210. The part of the push pulley 43211 extending into the slide groove 4324 can make rolling contact with the floating slider 4322. Based on this structure, there are a total of three rolling contact points between the floating slider 4322 and the transverse push block 4321. In this way, regardless of whether the floating slider 4322 slides forward or backward, there are two rolling contact points to achieve rolling contact, which greatly reduces friction.

[0072] The positioning device 43 in this embodiment can achieve precise positioning of the blank, which greatly improves the bending accuracy and enhances the stability of product quality.

[0073] In summary, this type of fully automated production line for vibration damping and sound absorption sheets has a high degree of automation and low human intervention in the entire production process, thus achieving high production efficiency and ensuring product quality.

[0074] Where there is no conflict, the above embodiments and features can be combined with each other.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A fully automated production line for vibration damping and sound absorption sheets, characterized in that: It includes sheet metal feeding equipment (1), stamping equipment (2), straightening equipment (3) and bending equipment (4); The sheet material feeding device (1) is used to store sheet materials, transfer sheet materials to the stamping device (2), and move sheet materials within the stamping device (2); The stamping equipment (2) is used to stamp the sheet metal to obtain a blank and transfer the blank to the straightening equipment (3); The straightening equipment (3) is used to detect the flatness of the billet, straighten the bent billet to make it flat, and also to transfer the billet to the bending equipment (4). The bending equipment (4) is used to bend the blank and then send out the finished product; the bending equipment (4) includes a blank frame (41), a feeding device (42), a positioning device (43), a transfer device (44), a bending device (45), and a discharge device (46); the blank frame (41) is used to receive the entire stack of blanks; the feeding device (42) is used to transfer a single blank from the blank frame (41) to the positioning device (43); the positioning device (43) is used to horizontally position the blank; the transfer device (44) is used to remove the blank from the positioning device (43), transfer the blank to the bending device (45), and rotate the blank 90° and then 180° on the horizontal plane to allow the blank to be The two ends are respectively facing the bending device (45) and the blank is placed on the discharge device (46); the bending device (45) is used to bend the two ends of the blank in sequence; the discharge device (46) is used to receive the finished product sent by the transfer device (44) and send out the finished product; the positioning device (43) includes a placement position (431), a transverse positioning mechanism (432) and a longitudinal positioning mechanism (433). The transverse positioning mechanism (432) includes two sets of transverse push components (4320) located on the transverse sides of the placement position (431) and able to approach each other in the transverse direction. When the two sets of transverse push components (4320) approach each other, they perform transverse positioning of the blank. The longitudinal positioning mechanism (433) includes a longitudinal... The longitudinal blocking assembly (4332) and the longitudinal pushing assembly (4331) are configured such that the longitudinal blocking assembly (4332) can abut the billet from the front of the placement position (431), and the longitudinal pushing assembly (4331) can slide from back to front to push the billet toward the longitudinal blocking assembly (4332); each transverse pushing assembly (4320) is provided with a transverse pushing block (4321) that is driven to slide laterally relative to the placement position (431), the transverse pushing block (4321) is connected to a floating slider (4322), the transverse pushing block (4321) contacts the billet by means of the floating slider (4322), and the floating slider (4322) can slide longitudinally relative to the transverse pushing block (4321); in the floating A reset spring (4323) is provided between the slider (4322) and the transverse push block (4321) to reset the floating slider (4322) in the longitudinal direction; the longitudinal push assembly (4331) is also provided with a second positioning detection element (4333). When the longitudinal push assembly (4331) approaches the longitudinal blocking assembly (4332), after the billet is clamped, as the longitudinal push assembly (4331) continues to approach the longitudinal blocking assembly (4332), the second positioning detection element (4333) is triggered; when the second positioning detection element (4333) is triggered, the two sets of transverse push assemblies (4320) perform the action of first moving away from each other by a certain distance and then moving closer to each other.

2. The fully automated production line for vibration damping and noise reduction sheets according to claim 1, characterized in that: The board feeding equipment (1) includes a feeding frame (11), a feeding platform (12) slidably connected to the feeding frame (11), a board frame (13) located on the side of the feeding platform (12), and a board transfer mechanism (14) erected above the feeding platform (12). The board transfer mechanism (14) is used to transfer the board from the board frame (13) to the feeding platform (12). The loading platform (12) is equipped with multiple clamping and pushing mechanisms (15). The clamping and pushing mechanisms (15) slide on the loading platform (12) in the direction of approaching and moving away from the stamping equipment (2). The end of the clamping and pushing mechanism (15) that is close to the stamping equipment (2) is equipped with a chuck (151) for clamping the sheet metal. The sliding direction of the loading platform (12) on the loading frame (11) is perpendicular to the sliding direction of the clamping and pushing mechanism (15).

3. The fully automated production line for vibration damping and noise reduction sheets according to claim 1, characterized in that: The stamping equipment (2) includes a stamping machine (21), a lower die frame (22) set on the stamping machine (21), a lower die (23) connected above the lower die frame (22), an upper die frame (24) set on the stamping machine (21) and driven to rise and fall by the stamping machine (21), an upper die (25) connected below the upper die frame (24), and a material receiving and conveying mechanism (26) slidably connected to the stamping machine (21); The upper mold (25) is a concave mold and has a mold cavity (251), and the lower mold (23) is a convex mold. A demolding top block (252) that slides up and down is provided in the mold cavity (251) of the upper mold (25). The demolding top block (252) is connected to the top surface of the upper mold (25). A demolding mechanism (27) is connected above the upper mold frame (24). The demolding mechanism (27) includes a demolding push rod (271). The demolding push rod (271) can pass through the upper mold frame (24) and push the demolding top block (252) from top to bottom. In the stamping operation, before each stamping, the ejector rod (271) rises and moves away from the ejector block (252) in the upper mold (25), and the ejector block (252) can slide upward; after each stamping, the ejector rod (271) descends and pushes the ejector block (252) downward so that the blank in the mold cavity (251) falls out of the mold cavity (251); the receiving and conveying mechanism (26) can slide to be partially located below the upper mold (25) to receive the blank falling out of the mold cavity (251), and the receiving and conveying mechanism (26) can slide to be completely away from the upper mold (25) and dock with the straightening device (3) to convey the blank to the straightening device (3).

4. The fully automated production line for vibration damping and noise reduction sheets according to claim 3, characterized in that: The stamping equipment (2) also includes an automatic die-mounting device (28), which is used to transfer the die to the stamping machine (21) and to retrieve and store the die after it is taken from the stamping machine (21); the stamping machine (21) also includes a stamping power source and a stamping slide (29) that is driven to rise and fall by the stamping power source. The upper die frame (24) is connected to the stamping slide (29). An adjustment mechanism (291) for adjusting the height of the stamping slide (29) is provided between the stamping power source and the stamping slide (29). Both the upper die frame (24) and the lower die frame (22) are provided with a die-locking structure (241). A mold detection mechanism (242) is provided in the upper mold frame (24). The mold detection mechanism (242) is triggered when the upper mold frame (24) contacts the upper mold (25). When installing the mold, the automatic mold mounting device (28) places the mold on the lower mold frame (22), the stamping power source moves to the bottom dead center, and then the adjusting mechanism (291) causes the stamping slide (29) to descend. When the upper mold frame (24) contacts the upper mold (25), the mold detection mechanism (242) is triggered, and the mold locking structure (241) in the upper mold frame (24) and the lower mold frame (22) is activated and locks the upper mold (25) and the lower mold (23) respectively.

5. The fully automated production line for vibration damping and noise reduction sheets according to claim 4, characterized in that: The upper mold frame (24) includes an upper mounting plate (243), and the mold detection mechanism (242) includes two movable blocks (2421) that slide vertically on the upper mounting plate (243), a transmission block (2422) that slides horizontally on the upper mounting plate (243), and a first positioning detection element (2423) that can be triggered by the transmission block (2422). Two movable blocks (2421) are arranged along the width of the mold and located on both sides of the demolding push rod (271). Each movable block (2421) has a hook-shaped structure (2424) at its top and a bottoming plane (2425) below the hook-shaped structure (2424). A spring is provided between the movable block (2421) and the upper mounting plate (243) to make the movable block (2421) tend to protrude downwards from the upper mounting plate (243). The transmission block (2422) is bifurcated and includes two bifurcated sections and a single-head section. The two bifurcated sections are connected to the two movable blocks (2421) respectively. The single-head section is used to trigger the first positioning detection element (2423). Each bifurcated section has a limit post (2426) at its end. The limit post (2426) slides between the hook-shaped structure (2424) and the bottoming plane (2425). When the two movable blocks (2421) rise simultaneously, causing the hook structure (2424) to disengage from the limiting post (2426), the two abutting planes (2425) simultaneously abut against the two bifurcated sections, and the transmission block (2422) slides to the trigger position that can trigger the first positioning detection element (2423); when the limiting post (2426) is located inside the hook structure (2424), the transmission block (2422) moves away from the trigger position.

6. The fully automated production line for vibration damping and noise reduction sheets according to claim 1, characterized in that: The straightening equipment (3) includes a receiving conveyor belt (31), a vision inspection device (32), a first transfer mechanism (33), a qualified product conveyor belt (34), a straightening conveyor belt (35), a straightening device (36), a second transfer mechanism (37), and a temporary storage table (38); The receiving conveyor belt (31) is used to receive the blanks transferred from the stamping equipment (2), and the vision inspection device (32) is set on the side of the conveying path of the receiving conveyor belt (31) to detect whether the blanks need to be straightened. The qualified product conveyor belt (34) and the straightening conveyor belt (35) are arranged side by side. The straightening device (36) has straightening conveyor belts (35) at both ends. The first transfer mechanism (33) is located at the end of the receiving conveyor belt (31) to transfer the billet to the qualified product conveyor belt (34) or the straightening conveyor belt (35). The second transfer mechanism (37) is located between the end of the qualified product conveyor belt (34) and the end of the straightening conveyor belt (35) to transfer the billet on the qualified product conveyor belt (34) and the straightening conveyor belt (35) to the temporary storage table (38).

7. The fully automated production line for vibration damping and noise reduction sheets according to claim 6, characterized in that: The straightening device (3) also includes a stacking transfer mechanism (39) mounted above the temporary storage platform (38). The temporary storage platform (38) is provided with a stacking position (381) and a temporary storage position (382). The second transfer mechanism (37) can stack the billet at the stacking position (381). The stacking transfer mechanism (39) can transfer the entire stack of billet from the stacking position (381) to the temporary storage position (382). The stacking transfer mechanism (39) can also transfer the entire stack of billet from the temporary storage position (382) to the bending device (4). A bending device (4) is installed on each side of the straightening device (3).

8. The fully automated production line for vibration damping and noise reduction sheets according to claim 1, characterized in that: The bending equipment (4) includes two transfer devices (44), two bending devices (45) and two discharge devices (46), with the positioning device (43) as the boundary. One transfer device (44), bending device (45) and discharge device (46) are located on one side of the positioning device (43), and the other transfer device (44), bending device (45) and discharge device (46) are located on the other side of the positioning device (43). The transfer device (44) is used to take the blank from the positioning device (43), transfer the blank to the bending device (45) located on the same side as the transfer device (44), rotate the blank 90° and then 180° on the horizontal plane so that the two ends of the blank face the bending device (45) respectively, and place the blank on the discharge device (46) located on the same side as the transfer device (44).

9. The fully automated production line for vibration damping and noise reduction sheets according to claim 1, characterized in that: The transverse push block (4321) is provided with a sliding groove (4324) with an opening facing the placement position (431) and extending longitudinally. The floating slider (4322) is strip-shaped and slidably connected in the sliding groove (4324). The transverse push block (4321) is provided with an auxiliary slide groove (4325) with its opening facing vertically. The auxiliary slide groove (4325) is connected to the sliding groove (4324) through a long through hole (4326). The floating slider (4322) is connected to an auxiliary slider (4327) that passes through the long through hole (4326) and extends into the auxiliary slide groove (4325). The auxiliary slider (4327) slides longitudinally in the long through hole (4326). The auxiliary slider (4327) is connected to an auxiliary pulley (4328). The axis of the auxiliary pulley (4328) extends vertically. The auxiliary pulley (4328) makes rolling contact with the auxiliary slide groove (4325). The two ends of the return spring (4323) abut against the groove wall of the auxiliary slide groove (4325) and the auxiliary slider (4327) respectively. The transverse push block (4321) is also provided with two vertically facing mounting holes (4329). The two mounting holes (4329) are located in front of and behind the auxiliary slide groove (4325) respectively. The mounting holes (4329) are connected to the slide groove (4324) through notches (43210). A top pulley (43211) is installed in the mounting hole (4329). The axis of the top pulley (43211) extends vertically. A part of the top pulley (43211) extends into the slide groove (4324) from the notches (43210). The part of the top pulley (43211) that extends into the slide groove (4324) can roll in contact with the floating slider (4322).

Images