A multi-station continuous punch forming die device

Abstract

The application discloses a kind of multi-station continuous stamping forming die device, belong to stamping forming die technical field.The machining table is rotatably installed with a plurality of lower molds on the indexing turntable, and the machining table is provided with an oil injection assembly at the flow transfer station.The oil injection assembly includes a lifting plate, a drive rack, a spraying unit, a rotating shaft and a rotating rod connected by a bevel gear set, and the end of the rotating shaft is fixed with a circular gear.The lifting plate is lowered to make the circular gear roll along the meshing toothed segment of the drive rack, which is converted into a rotational force to drive the spraying unit to rotate and spray lubrication inside the lower mold.The device converts linear lifting directly into rotational power using a rack and pinion mechanism, the transmission path is short, and it is suitable for high-frequency automatic flow transfer rhythm;At the same time, by lubrication, the demolding resistance is reduced, the size deformation of the stamping part caused by inward extrusion demolding is avoided, and the positioning accuracy of the workpiece flow and the yield rate of the continuous process are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to a multi-station continuous stamping die device. Background Technology

[0002] In the continuous production of metal stamping parts, in order to improve production efficiency, multi-station continuous stamping dies are usually used to perform multi-process assembly line operations on sheet metal. In order to ensure the smooth flow of workpieces between stations, the stamped parts need to be demolded from the die quickly and without damage so that the automated conveyor can accurately pick them up and deliver them to the next processing station.

[0003] Currently, most existing stamping demolding solutions employ a bottom-side lifting mechanism combined with sidewall separation. For example, invention patent CN110385376B discloses a metal forming stamping die. The working principle of this die is that after the sheet metal is stamped, a lifting cylinder pushes the lower end of the stamped part through a lifting plate. Simultaneously, the lifting cylinder drives a fixed frame to press against a pushing frame, triggering a pneumatic mechanism via a sliding rod and connecting rod. The internal air pressure of the pneumatic mechanism changes, causing the lifting mechanism to move upwards. As the tenon frame inside the lifting mechanism moves upwards, it presses the inclined baffle inwards, squeezing the upper end of the stamped part inwards, causing the upper end of the stamped part to separate from the sidewall of the die frame. Finally, the stamped part is manually removed.

[0004] This method of using inward extrusion to separate the sidewalls of stamped parts has shortcomings. In actual multi-station continuous stamping, metal stamped parts have fixed structural dimensions after forming. When the tenon frame extrudes the edge of the stamped part from the outside inward, the applied lateral extrusion force will change the original opening shape of the stamped part, causing the dimensional parameters of the stamped part to deviate from the initial design tolerance. Multi-station continuous stamping dies have specific requirements for the positioning accuracy of the workpiece between multiple processes. Deformation of the stamped part dimensions will make it difficult for the dies in subsequent stations to close, affecting the yield of multi-process continuous operations. In addition, this method relies on manual removal of the workpiece from inside the lifting frame during the material handling stage, and its demolding and separation action relies on a long transmission chain of mechanical and pneumatic multi-stage linkage, resulting in a long action response cycle, which is difficult to adapt to the high-frequency, automated continuous flow and conveying rhythm of multi-station dies. Summary of the Invention

[0005] The present invention provides a multi-station continuous stamping forming die device to solve the problems of existing demolding schemes, which reduce the accuracy of multi-station flow and mold closing due to workpiece size deformation caused by lateral extrusion, and the demolding linkage mechanism being lengthy and relying on manual material handling, making it difficult to adapt to the cycle time of high-frequency automated continuous stamping.

[0006] The present invention adopts the following technical solution: a multi-station continuous stamping forming die device. It includes a processing table on which an indexing turntable is horizontally rotatable, and the indexing turntable has a plurality of lower dies spaced apart along its circumference; A paint spraying assembly is disposed at a corresponding transfer station on the machining table, the paint spraying assembly comprising: The drive unit includes a vertically movable lifting plate; The rotating unit includes a rotating rod that rotates on the bottom surface of the lifting plate and a rotating shaft that rotates through the side of the lifting plate. The rotating shaft and the rotating rod are connected by a bevel gear set, and a spherical gear is fixed at the outer end of the rotating shaft. A drive rack is vertically fixed on the processing table. The upper and lower ends of the drive rack are smooth, toothless sections, and the middle part is a toothed section that meshes with the spur gear. A spraying unit is connected to the bottom end of the rotating rod; Specifically, during the downward movement of the lifting plate, the spur gear has a toothed segment meshing with the drive rack to drive the spraying unit to rotate, thereby spraying lubricant onto the interior of the lower mold.

[0007] Furthermore, the oil injection assembly also includes a sealing unit, which includes a suspension plate symmetrically and downwardly fixed to the bottom surface of the lifting plate, and a pressure plate with a central hole clearance fit suspended around the rotating rod. A guide shaft is vertically fixed on the top surface of the cover plate. The top end of the guide shaft slides upward through the corresponding suspension plate. A return spring is sleeved on the outside of the guide shaft and abuts against the suspension plate and the cover plate. After the pressure plate moves down to contact and fit the lower mold opening, the overtravel generated by the continued downward pressure of the lifting plate forces the suspension plate to slide relative to the guide shaft and continuously compress the return spring, providing the pressure plate with a dynamic clamping force to counteract the internal spraying air pressure.

[0008] Furthermore, the upper section of the rotating rod has an integrally formed annular protrusion on its outer wall, and the spraying unit also includes a torsion spring coaxially sleeved on the outside of the rotating rod, with the two ends of the torsion spring respectively fixedly connected between the annular protrusion and the bottom surface of the lifting plate; When the sprocket rolls downward along the meshing toothed section, the torsion spring deforms and stores torque accordingly; and when the lifting plate continues to press down, causing the sprocket to disengage from the toothless smooth section at the lower end of the drive rack, the torsion spring releases its elastic potential energy and converts it into a restoring torque, driving the rotating rod and the spraying unit to rotate in the opposite direction.

[0009] Furthermore, the spraying unit includes a T-shaped tube whose vertical end is fixed to the bottom end of the rotating rod, and an extension tube whose one end is sleeved to the horizontal end of the T-shaped tube. A locking element for locking the relative extension length is installed at the overlapping part of the two. The bottom surfaces of the T-shaped tube and the extension tube are connected with fuel injectors at intervals, and the fuel injectors at the outermost two ends are inclined outwards. The horizontal section of the T-shaped tube is also connected with a fuel inlet.

[0010] Furthermore, the side of the lifting plate is fixed with a side plate in a vertical position downwards, and the rotating shaft is horizontally inserted through the side plate via a bearing; The bevel gear set includes a driven bevel gear coaxially fixed to the upper part of the rotating rod, and a driving bevel gear coaxially fixed to the inner end of the rotating shaft. The two maintain perpendicular meshing transmission to achieve positive reversal between the rotating shaft and the rotating rod.

[0011] Furthermore, the drive unit also includes a mounting frame vertically fixed to the processing table, and a lifting cylinder vertically fixed to the top of the mounting frame, with the lifting plate connected to the lower power output end of the lifting cylinder; A guide rod is fixed to the top surface of the lifting plate, and the top end of the guide rod slides upward and passes through the top crossbeam of the mounting frame.

[0012] Furthermore, a buffer spring is vertically abutting between the bottom surface of the lower mold and the top surface of the processing table; The bottom surface of the lower mold is also fixed with the top of a guide seat, and the bottom of the guide seat slides downward through the indexing turntable.

[0013] Furthermore, the processing table is equipped with a feeding assembly at a subsequent station along the rotation direction of the indexing turntable; The feeding assembly includes a feeding conveyor belt mounted on one side of the processing table, an arched frame bridging and fixed above the processing table, a telescopic cylinder fixed to the top of the arched frame, and a lifting slider connected to the lower power output end of the telescopic cylinder. A horizontal cylinder is fixed on the side wall of the lifting slider. The lateral power output end of the horizontal cylinder is connected to a mounting plate. A pneumatic gripper is suspended and fixed at the bottom of the mounting plate.

[0014] Furthermore, the processing table is equipped with a stamping component at the subsequent transfer station of the feeding component; The stamping assembly includes a stamping stand that is fixed above the processing table and a stamping cylinder that is fixed vertically to the top of the stamping stand.

[0015] Furthermore, the drive unit also includes a protective cover, which is installed on and fixed to the bottom periphery of the lifting plate.

[0016] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: This invention discloses a multi-station continuous stamping forming die device. The device utilizes an indexing turntable with several lower dies mounted on a processing table, and oil spraying components are installed at corresponding flow stations. The linear stroke of the lifting plate moving downwards causes a circular gear to roll along the meshing toothed segment of a drive rack. After reversing direction via a rotating shaft and bevel gear set, this drives the bottom spraying unit to rotate, thereby performing rotary spraying lubrication on the interior of the lower dies. This device directly converts the lifting motion into rotary spraying power through the mechanical linkage of the rack and gears, resulting in a short transmission path and fast response, effectively... It is adapted to the high-frequency, automated continuous flow and conveying cycle of multi-station molds; at the same time, the uniform lubrication treatment inside the lower mold reduces the demolding resistance after forming, avoiding the deformation of the opening shape and dimensional tolerance deviation of the stamped parts caused by the reliance on external mechanisms to squeeze the mold inward, ensuring the positioning accuracy of the workpiece between multiple processes and the precise mold closing of the subsequent molds, maintaining the yield rate of the continuous stamping process; in addition, the multi-station continuous flow mechanism based on the indexing turntable replaces the original manual material handling process, meeting the needs of continuous automated production of stamping processing. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention and form part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the multi-station continuous stamping forming die device in this application; Figure 2 For the present invention Figure 1 The main view; Figure 3 For the present invention Figure 1 A partial structural diagram; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 For the present invention Figure 1 A partial structural diagram; Figure 6 For the present invention Figure 1 Schematic diagram of the intermediate fuel injection assembly; Figure 7 For the present invention Figure 6 A partial structural diagram; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C.

[0019] Figure label: 1. Machining table; 11. Indexing turntable; 12. Lower mold; 13. Buffer spring; 14. Guide seat; 2. Oil spraying assembly; 21. Mounting stand; 22. Lifting cylinder; 23. Lifting plate; 231. Guide rod; 24. Protective cover; 25. Rotating rod; 251. Torsion spring; 252. T-tube; 253. Extension tube; 254. Locking component; 255. Oil injector; 256. Oil inlet; 26. Driven bevel gear; 27. Side plate 28. Rotating shaft; 29. ​​Driving bevel gear; 210. Circular gear; 211. Drive rack; 212. Suspension plate; 213. Pressure plate; 214. Guide shaft; 215. Return spring; 3. Feeding assembly; 31. Feeding conveyor belt; 32. Arch frame; 33. Telescopic cylinder; 34. Lifting slider; 35. Horizontal cylinder; 36. Mounting plate; 37. Pneumatic gripper; 4. Stamping assembly; 41. Stamping stand; 42. Stamping cylinder. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1: This example mainly introduces the specific structure of a multi-station continuous stamping forming die device. Specifically: refer to... Figures 1-3 As shown, this application provides a multi-station continuous stamping forming die device, including a processing table 1. A dividing turntable 11 is horizontally rotatable on the processing table 1 via bearings. A plurality of lower dies 12 are evenly distributed along the circumference of the dividing turntable 11 to form multiple independent flow processing stations. In order to provide flexible buffering during die flow and subsequent stamping, a buffer spring 13 is vertically abutting between the bottom surface of the lower die 12 and the top surface of the processing table 1. At the same time, the top end of a guide seat 14 is fixed on the bottom surface of the lower die 12. The bottom end of the guide seat 14 slides downward through the dividing turntable 11 to limit the vertical movement trajectory of the lower die 12 when it is pressed so as not to deviate.

[0023] At each of the flow stations on the processing table 1, along the rotation direction of the indexing turntable 11, an oil spraying component 2, a feeding component 3, and a stamping component 4 are sequentially arranged to perform oil spraying lubrication, fixed-point feeding, and mold closing forming actions of the mold 12 under no-load conditions, respectively.

[0024] Reference Figures 6-9 As shown, in order to provide uniform lubrication to the interior of the unloaded mold before stamping to prevent scattering, this device is equipped with an oil spraying assembly 2 at the first working station. The oil spraying assembly 2 specifically includes a drive unit, a rotation unit, a spraying unit, and a sealing unit.

[0025] The drive unit mainly includes a mounting frame 21, a lifting cylinder 22, a lifting plate 23, a guide rod 231, and a protective cover 24. Specifically, the mounting frame 21 is vertically fixed on the processing table 1 and aligned with the corresponding workstation of the indexing turntable 11, providing support for that workstation; the lifting cylinder 22 is vertically fixed to the top of the mounting frame 21, and its lower power output end is horizontally fixedly connected to the lifting plate 23.

[0026] The lifting cylinder 22 is adapted to be activated and drive its output end to extend downward, thereby driving the lifting plate 23 and the components below it to perform vertical downward pressing and feeding. Among them, the bottom end of the guide rod 231 is fixed to the lifting plate 23, and its top end slides upward to guide and cooperate with the top crossbeam of the mounting frame 21. The sliding guide restricts the horizontal degree of freedom of the mechanism, slides downward synchronously with the lifting plate 23 as it moves down, and provides vertical constraint to counteract the lateral reaction force and ensure the smoothness of the overall lifting action. The protective cover 24 is covered and fixed to the bottom periphery of the lifting plate 23, and moves up and down synchronously with the lifting plate 23 to continuously protect the internal transmission mechanism.

[0027] The rotating unit mainly includes a rotating rod 25, a driven bevel gear 26, a side plate 27, a rotating shaft 28, a driving bevel gear 29, a spur gear 210, and a driving rack 211.

[0028] Specifically, in order to convert the linear motion of the lifting plate 23 into the rotational motion during spraying, the top of the rotating rod 25 is suspended on the bottom surface of the lifting plate 23 by a bearing, and the upper outer wall is integrally formed with an annular protrusion (not shown in the figure). The side plate 27 is fixed vertically downward to the side of the lifting plate 23, and a rotating shaft 28 is inserted on it in a horizontal position by a bearing.

[0029] Driven bevel gear 26 is coaxially sleeved and fixed to the upper middle part of rotating rod 25, and driving bevel gear 29 is coaxially fixed to one end of rotating shaft 28 near the inner side, and maintains perpendicular meshing with driven bevel gear 26, thereby forming a positive reciprocating transmission between rotating shaft 28 and rotating rod 25. At the same time, spur gear 210 is coaxially fixed to the other end of rotating shaft 28 that protrudes from side plate 27, and drive rack 211 is vertically fixed to the inner side wall of mounting bracket 21 by bracket, with toothless smooth sections at the upper and lower ends and a toothed section in the middle that meshes with spur gear 210.

[0030] When the lifting cylinder 22 of the drive unit drives the lifting plate 23 downward, the lifting plate 23 drives the rotating shaft 28 and the spur gear 210 suspended on it to descend synchronously. In the initial stage of descent, the spur gear 210 is directly opposite the smooth section at the upper end of the drive rack 211. At this time, the gear does not rotate but only moves downward in a straight line. As the drive unit continues to press down and feed, the spur gear 210 smoothly cuts into the meshing toothed section in the middle of the drive rack 211.

[0031] At this point, the linear downward displacement forces the spur gear 210 to overcome rotational resistance and roll downward along the fixed rack, thereby converting the linear thrust provided by the drive unit into the rotational torque of the spur gear 210. This torque then achieves a 90-degree reversal through the bevel gear set on the rotating shaft 28, ultimately driving the suspended rotating rod 25 to rotate smoothly, providing a continuous rotational power source for the subsequent painting unit.

[0032] The spraying unit mainly includes a torsion spring 251, a T-shaped tube 252, an extension tube 253, a locking element 254, an oil nozzle 255, and an oil inlet 256. Specifically, in order to receive the rotational power output by the rotating unit and perform the final lubrication action, the vertical end of the T-shaped tube 252 is fixed to the bottom end of the rotating rod 25 and rotates synchronously with it; the extension tube 253, which is L-shaped in shape, has one end of its horizontal section fitted onto one end of the horizontal section of the T-shaped tube 252, forming a sliding pipe that can adjust its width according to the inner diameter of the lower mold 12. The locking element 254 is installed at the overlapping point of the two tubes to lock and fix the working length.

[0033] In terms of the spray flow channel and terminal layout, in order to achieve wide-angle coverage within the cavity, the oil nozzles 255 are distributed in a straight line at intervals on the bottom surface of the T-shaped tube 252 and the extension tube 253. The oil nozzles 255 located at the outermost ends of the bottom surface of the T-shaped tube 252 and the extension tube 253 are set at a certain angle to expand the radial spray surface during rotation spraying. The oil inlet 256 is connected to the other end of the T-shaped tube 252 for horizontal connection to an external high-pressure lubricating oil source.

[0034] Meanwhile, the torsion spring 251 is coaxially sleeved on the outside of the rotating rod 25, with its two ends fixedly connected between the annular protrusion on the upper part of the rotating rod 25 and the bottom surface of the lifting plate 23. When the rotating rod 25 is driven to rotate by the gear and rack mechanism during the downward stroke, the torsion spring 251 deforms and continues to twist and store force. As the downward action continues, until the spur gear 210 smoothly passes through the meshing area and enters the toothless smooth section at the lower part of the drive rack 211, the spur gear 210 disengages from the meshing restriction. At this time, the torsion spring 251 releases the elastic potential energy accumulated during the downward stage, which is converted into a reverse reset torque, driving the bottom spraying unit to rotate in the opposite direction once, thereby cooperating with the high-pressure oil spraying action to achieve circumferential spraying lubrication of the inner wall of the lower mold 12.

[0035] The sealed unit mainly includes a suspension plate 212, a pressure plate 213, a guide shaft 214, and a return spring 215. Specifically, in order to provide an adaptive sealed space to prevent oil mist from scattering and overflowing during high-pressure rotary spraying, the sealed unit utilizes elastic deformation to form a follow-up pressing mechanism. Two suspension plates 212 are symmetrically fixed downwards on both sides of the bottom surface of the lifting plate 23, moving up and down synchronously with the drive unit. The center hole of the pressure plate 213 is suspended and fitted below the outer periphery of the rotating rod 25 with a clearance fit. This clearance fit ensures that the pressure plate 213 can float up and down independently without interfering with the rotation of the internal rotating rod 25. Two guide shafts 214 are respectively fixed vertically upwards on the top surface of the pressure plate 213, and their top ends slide upwards through the corresponding suspension plates 212 with a sliding guide fit. The return spring 215 is coaxially fitted on the outside of the guide shaft 214 and abuts and supports between the suspension plate 212 and the pressure plate 213.

[0036] As the lifting plate 23 descends as a whole, the pressure plate 213 moves down synchronously until its bottom surface contacts and abuts the top opening of the lower mold 12. At this point, the pressure plate 213 stops moving down due to the obstruction of the mold end face, completing the initial positioning and preliminary sealing. However, to meet the transmission requirements of the gear and rack mechanism and the stroke requirements for the release of the torsion spring 251, the lifting plate 23 still needs to continue to press down for an overtravel period under the drive of the cylinder. During this overtravel period, the suspension plate 212 continues to press down with the lifting plate 23, forcing it to slide downward relative to the guide shaft 214, thereby continuously compressing the return spring 215.

[0037] The downward elastic force generated by the compression of the return spring 215 during this process is converted into a flexible clamping force on the pressure plate 213, thereby effectively resisting the outward thrust of the air pressure generated by the internal high-pressure oil spraying, ensuring that the pressure plate 213 can adaptively and tightly press against the mold opening throughout the entire spraying cycle, achieving a stable and reliable dynamic seal.

[0038] Reference Figures 4-5As shown, a feeding assembly 3 is provided at the next transfer station of the oil spraying assembly 2. The feeding assembly 3 mainly includes a feeding conveyor belt 31, an arched frame 32, a telescopic cylinder 33, a lifting slider 34, a horizontal cylinder 35, a mounting plate 36, and a pneumatic gripper 37.

[0039] Specifically, to achieve automatic picking and fixed-point placement of parts to be stamped, a feeding conveyor belt 31 is mounted on one side of the processing table 1 and extends to the loading station for continuous conveying of materials to be processed. An arched frame 32 is fixed above the processing table 1, and its position corresponds to the output end of the feeding conveyor belt 31. A telescopic cylinder 33 is fixed vertically downward on the top crossbeam of the arched frame 32, and its lower power output end is connected to a lifting slider 34 to provide lifting driving force in the Z-axis direction for the transfer action. A horizontal cylinder 35 is fixed horizontally on the side wall of the lifting slider 34, and its lateral power output end is connected to a mounting plate 36 to provide translation driving force in the horizontal direction. A pneumatic gripper 37 is suspended downward and fixed to the bottom of the mounting plate 36 for gripping and releasing. Through the alternating stepping action of the vertical and horizontal cylinders, the cross-station transfer of materials from the end of the conveyor belt to the inside of the lower mold 12 can be smoothly completed.

[0040] Reference Figure 3 As shown, a stamping assembly 4 is installed at the subsequent transfer station of the feeding assembly 3. This assembly mainly includes a stamping stand 41 and a stamping cylinder 42.

[0041] Specifically, the stamping stand 41 is fixedly mounted above the processing table 1, and the stamping cylinder 42 is fixed vertically on top of the stamping stand 41. When the lower die 12, loaded with the material to be processed, is rotated to the final station and positioned by the turntable, the stamping cylinder 42 is activated, driving the upper die (not shown in the figure) fixed at its bottom to perform linear pressure feeding downwards. The upper die and lower die 12 are guided and closed, and the final rolling and metal forming of the internal material is completed by the mechanical pressure output downwards by the stamping cylinder 42.

[0042] The specific workflow is as follows: This device drives the lower mold 12 to pass through three independent stations in sequence: oil spraying, material loading, and stamping, through the intermittent horizontal rotation of the indexing turntable 11 on the processing table 1. When the unloaded lower mold 12 passes under the first oil spraying station, the lifting cylinder 22 drives the lifting plate 23 downward, and the pressure plate 213 of the sealing unit moves down to contact and fit the opening of the lower mold 12. The overtravel generated by the continued downward pressure of the lifting plate 23 forces the suspension plate 212 to slide relative to the guide shaft 214 and compress the return spring 215, generating a clamping force to counteract the internal spraying air pressure and achieve mold sealing.

[0043] Simultaneously, the lifting plate 23 descends, causing the spur gear 210 to move downwards and engage with the meshing section of the drive rack 211, converting the linear thrust into rotational torque. This torque drives the rotating rod 25 and the spraying unit to rotate in the forward direction through the bevel gear set, and causes the torsion spring 251 to deform and store energy. As the lifting plate 23 continues to press down, the spur gear 210 disengages from the toothless smooth section at the bottom of the drive rack 211, and the torsion spring 251 releases its elastic potential energy, which is converted into a restoring torque, driving the spraying unit to rotate in the reverse direction. Combined with the high-pressure lubricating oil, the oil nozzle 255 sprays lubricating oil around the inner wall of the lower mold 12.

[0044] After lubrication, the lower mold 12 rotates with the indexing turntable 11 to the second loading station. At this time, the feeding conveyor belt 31 continuously transports the material to be processed to the corresponding position of the arch frame 32. Subsequently, the pneumatic gripper 37 is controlled by the alternating stepping action of the Z-axis lifting drive force provided by the telescopic cylinder 33 and the horizontal translation drive force provided by the horizontal cylinder 35 to pick up the material from the end of the feeding conveyor belt 31, transfer it across stations, and place it into the lower mold 12 at a fixed point, completing the automated loading action.

[0045] The lower die 12, loaded with material, continues to flow to the bottom of the stamping station and completes its positioning. The stamping cylinder 42 then activates, driving the upper die downwards in a linear pressurized feed until the upper and lower dies 12 are guided and closed. Relying on the downward mechanical pressure output by the stamping cylinder 42, the final rolling and metal forming of the internal material is completed. During the pressure-sealed mold closing process, the buffer spring 13 on the bottom surface of the lower die 12 provides longitudinal cushioning for the die, while the guide seat 14 slides downwards along the indexing turntable 11 to prevent deviation of the vertical movement trajectory of the lower die 12 under pressure, ensuring the stability of the forming process.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-station continuous stamping forming die device, characterized in that, include: A processing table (1) is mounted on which an indexing turntable (11) is rotatably mounted. Several lower molds (12) are distributed at intervals along the circumferential direction on the indexing turntable (11). A paint spraying assembly (2) is disposed at a corresponding transfer station on the processing table (1), and the paint spraying assembly (2) includes: The drive unit includes a vertically movable lifting plate (23). The rotating unit includes a rotating rod (25) that rotates on the bottom surface of the lifting plate (23) and a rotating shaft (28) that rotates through the side of the lifting plate (23). The rotating shaft (28) and the rotating rod (25) are connected by a bevel gear set. A spur gear (210) is fixed at the outer end of the rotating shaft (28). The drive rack (211) is vertically fixed on the processing table (1). The upper and lower ends of the drive rack (211) are smooth sections without teeth, and the middle part is a toothed section that meshes with the spur gear (210). The spraying unit is connected to the bottom end of the rotating rod (25); In the stroke of the lifting plate (23) moving downward, the spur gear (210) has a toothed segment meshing with the drive rack (211) to drive the spraying unit to rotate, so as to spray lubrication on the inside of the lower mold (12).

2. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The oil injection assembly (2) also includes a sealing unit, which includes a suspension plate (212) symmetrically fixed downward to the bottom surface of the lifting plate (23), and a pressure plate (213) with a central hole gap fit suspended around the rotating rod (25). The top surface of the cover plate (213) is vertically fixed with a guide shaft (214). The top end of the guide shaft (214) slides and guides upward through the corresponding suspension plate (212). A return spring (215) is sleeved on the outside of the guide shaft (214) and abuts against the suspension plate (212) and the cover plate (213). After the pressure plate (213) moves down to contact and fit the opening of the lower mold (12), the overtravel generated by the continued downward pressure of the lifting plate (23) forces the suspension plate (212) to slide relative to the guide shaft (214) and continuously compress the return spring (215), providing the pressure plate (213) with a dynamic clamping force to counteract the internal spraying air pressure.

3. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The upper section of the rotating rod (25) has an integrally formed annular protrusion. The spraying unit also includes a torsion spring (251) coaxially sleeved on the outside of the rotating rod (25). The two ends of the torsion spring (251) are respectively fixedly connected between the annular protrusion and the bottom surface of the lifting plate (23). When the sprocket (210) rolls downward along the meshing toothed section, the torsion spring (251) deforms and stores torque accordingly; and when the lifting plate (23) continues to press down, causing the sprocket (210) to disengage from the toothless smooth section at the lower end of the drive rack (211), the torsion spring (251) releases its elastic potential energy and converts it into a restoring torque, driving the rotating rod (25) and the spraying unit to rotate in the opposite direction.

4. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The spraying unit includes a T-shaped tube (252) whose vertical end is fixed to the bottom end of the rotating rod (25), and an extension tube (253) whose one end is sleeved at the end of the horizontal section of the T-shaped tube (252). A locking member (254) for locking the relative telescopic length is installed at the overlapping part of the two. The bottom surfaces of the T-shaped tube (252) and the extension tube (253) are connected with fuel injectors (255) at intervals, and the fuel injectors (255) at the outermost two ends are inclined outward. The horizontal section of the T-shaped tube (252) is also connected with an oil inlet (256).

5. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The side of the lifting plate (23) is fixed with a side plate (27) in a vertical position, and the rotating shaft (28) is horizontally mounted on the side plate (27) through a bearing; The bevel gear set includes a driven bevel gear (26) coaxially fixed to the upper part of the rotating rod (25) and a driving bevel gear (29) coaxially fixed to the inner end of the rotating shaft (28). The two maintain vertical meshing transmission to achieve positive exchange direction between the rotating shaft (28) and the rotating rod (25).

6. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The drive unit also includes a mounting bracket (21) that is vertically fixed on the processing table (1), and a lifting cylinder (22) that is vertically fixed on the top of the mounting bracket (21). The lifting plate (23) is connected to the lower power output end of the lifting cylinder (22). The top surface of the lifting plate (23) is fixed with a guide rod (231), and the top end of the guide rod (231) slides upward and passes through the top crossbeam of the mounting frame (21).

7. The multi-station continuous stamping forming die device according to claim 1, characterized in that: A buffer spring (13) is vertically abutting between the bottom surface of the lower mold (12) and the top surface of the processing table (1). The bottom surface of the lower mold (12) is also fixed with the top of the guide seat (14), and the bottom end of the guide seat (14) slides downward through the indexing turntable (11).

8. The multi-station continuous stamping forming die device according to claim 7, characterized in that: The processing table (1) is provided with a feeding assembly (3) at the subsequent station along the rotation direction of the indexing turntable (11). The feeding assembly (3) includes a feeding conveyor belt (31) mounted on one side of the processing table (1) and an arched frame (32) fixed above the processing table (1). A telescopic cylinder (33) is fixed on the top of the arched frame (32), and a lifting slider (34) is connected to the lower power output end of the telescopic cylinder (33). A horizontal cylinder (35) is fixed on the side wall of the lifting slider (34). The lateral power output end of the horizontal cylinder (35) is connected to a mounting plate (36). A pneumatic gripper (37) is suspended and fixed at the bottom of the mounting plate (36).

9. The multi-station continuous stamping forming die device according to claim 8, characterized in that: The processing table (1) is equipped with a stamping component (4) at the subsequent transfer station of the feeding component (3). The stamping assembly (4) includes a stamping stand (41) that is fixed above the processing table (1) and a stamping cylinder (42) that is fixed vertically to the top of the stamping stand (41).

10. The multi-station continuous stamping forming die device according to claim 1, characterized in that: The drive unit also includes a protective cover (24), which covers and is fixed to the bottom periphery of the lifting plate (23).

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