Material pressing device and material pressing method for vehicle back door outer plate

Abstract

The invention discloses a material pressing device and a material pressing method for a vehicle back door outer plate, and relates to the technical field of material pressing, the material pressing device comprises an upper sliding block and a lower working table which are arranged in the vertical direction, the upper sliding block can move towards or away from the lower working table in the vertical direction, and a die pressing structure is located between the upper sliding block and the lower working table; the upper die is fixedly connected with the upper sliding block, the lower die is fixedly connected with the lower workbench, the upper die and the lower die are oppositely arranged in the vertical direction, the first material pressing plate can move in the vertical direction relative to the upper sliding block, and the second material pressing plate can move in the vertical direction relative to the lower workbench. The first pressing plate and the second pressing plate are additionally arranged to participate in pressing at the same time, uniform pressure can be applied in the pressing process, the flowing direction of plates is limited, process fluctuation caused by material movement is reduced, the problems of flowing and forming of the plates, R-angle sliding lines and the like in the forming process of workpieces such as a back door outer plate are solved, and the product quality is improved. And therefore, the product quality and consistency of the workpieces can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of pressing technology, and in particular to a pressing device and pressing method for the outer panel of a vehicle's rear door. Background Technology

[0002] In related technologies, with the widespread popularity of SUVs in China, various automakers have launched SUVs of various sizes and types. The tailgate outer panel is particularly important in SUV models, as it has a strict matching relationship with major components such as the roof and side panels. To achieve the desired shape characteristics of the tailgate outer panel and ensure the forming quality of the product during each process of the stamping die, it is necessary to study the formability of the tailgate outer panel's appearance edges and surface quality, and to make breakthroughs in the stamping process to realize its shape characteristics. However, existing blanking devices used for vehicle tailgate outer panels are prone to cracking and wrinkling during the tailgate outer panel drawing process, and may also cause R-angle slippage problems, resulting in a large overall surface difference in the tailgate outer panel, significantly reducing the product quality of tailgate outer panels and other workpieces. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a pressing device for the outer panel of a vehicle tailgate, which can not only ensure the stability of the pressing state of workpieces such as the outer panel of the tailgate during the production process and improve the fit between the sheet and the molded surface, but also effectively solve the problems of cracking and R-angle slippage during the forming of workpieces such as the outer panel of the tailgate.

[0004] The present invention further proposes a pressing method for use in the above-mentioned pressing device.

[0005] A pressing device for a vehicle tailgate outer panel according to an embodiment of the present invention includes: A press has an upper slide and a lower worktable. The upper slide and the lower worktable are arranged vertically, and the upper slide can move toward or away from the lower worktable in the vertical direction. The die structure is located between the upper slider and the lower worktable. The die structure includes an upper die and a lower die. The upper die is fixedly connected to the upper slider, and the lower die is fixedly connected to the lower worktable. The upper die and the lower die are arranged opposite each other in the vertical direction. The upper die includes a first pressure plate, which is movable in the vertical direction relative to the upper slider. The lower die includes a second pressure plate, which is movable in the vertical direction relative to the lower worktable.

[0006] According to an embodiment of the present invention, a pressing device for a vehicle rear door outer panel can apply uniform pressure and restrict the flow direction of the sheet material by adding a first pressing plate and a second pressing plate to press the material simultaneously. This ensures that workpieces such as the rear door outer panel are deformed uniformly according to the shape of the mold cavity. The first pressing plate and the second pressing plate reduce process fluctuations caused by material movement by fixing the position of the sheet material, making parameters such as pressing force and speed easier to control. This can improve the flow and forming of the sheet material during the forming process of workpieces such as the rear door outer panel, as well as problems such as R-angle slip lines, thereby effectively improving the product quality of the workpiece. According to some embodiments of the present invention, the upper mold further includes a cavity mold, which is disposed around the first pressure plate in the circumferential direction, and the first pressure plate is movably connected to the cavity mold, and the first pressure plate is movable relative to the cavity mold in the vertical direction.

[0007] According to some embodiments of the present invention, the lower die further includes a punch, which is disposed around the second pressure plate in the circumferential direction, and the second pressure plate is movably connected to the punch, and the second pressure plate is movable relative to the punch in the vertical direction.

[0008] According to some embodiments of the present invention, the pressing device further includes a pressing ring, which is disposed around the punch along the circumference of the punch and is movably connected to the punch so that the pressing ring is movable relative to the punch in the vertical direction.

[0009] According to some embodiments of the present invention, the pressing device further includes: a first driving mechanism, the first driving mechanism being connected to a first pressing plate, the first driving mechanism being used to drive the first pressing plate to move relative to the die in a vertical direction.

[0010] According to some embodiments of the present invention, the pressing device further includes: a second driving mechanism, the second driving mechanism being connected to the second pressing plate, the second driving mechanism being used to drive the second pressing plate to move relative to the punch in a vertical direction.

[0011] According to some embodiments of the present invention, the pressing device further includes: a first limiting structure, which is assembled with the first pressing plate and the die, and the first limiting structure is used to limit the range of movement of the first pressing plate in the vertical direction.

[0012] According to some embodiments of the present invention, the pressing device further includes: a second limiting structure, which is assembled with the second pressing plate and the punch, and the second limiting structure is used to limit the range of movement of the second pressing plate in the vertical direction.

[0013] According to some embodiments of the present invention, the pressing device further includes: a third driving mechanism, which is connected to the pressing ring and is used to drive the pressing ring to move relative to the punch in the vertical direction.

[0014] According to an embodiment of the present invention, the pressing method is applied to the pressing device for the outer panel of a vehicle tailgate described above. The pressing method includes: Place the outer panel of the rear door between the upper and lower molds; The upper slider drives the upper die to move vertically toward the lower die until the upper die contacts the pressure ring of the pressure device; The upper slider drives the upper die to move vertically toward the lower die, while simultaneously driving the pressure ring to move vertically toward the punch, so that the first pressure plate contacts the second pressure plate; The upper slider drives the upper die to move vertically toward the lower die, and at the same time drives the pressure ring to move vertically toward the punch, and drives the second pressure plate to move vertically toward the punch until the stroke of the second pressure plate ends; The upper slider drives the die to move vertically toward the punch, while simultaneously driving the pressure ring to move vertically toward the punch.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the material pressing device according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the pressing device according to an embodiment of the present invention; Figure 3 This is another cross-sectional view of the pressing device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the initial state of the pressing device according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the pressing device of this invention performing the pressing of the outer ring of the drawing process; Figure 6 This is a cross-sectional view of the pressing device of this invention performing inner ring pressing during drawing; Figure 7 This is a cross-sectional view of the material pressing device in the completed drawing state according to an embodiment of the present invention; Figure 8 This is a schematic flowchart of the pressing method according to an embodiment of the present invention.

[0017] Figure label: Pressing device 100; Press 10; Slide up 20; Lower workbench 30; Compression molding structure 40; Upper mold 41; First pressure plate 411; Die 412; First drive mechanism 413; First limiting structure 414; First guide plate 415; Lower die 42; second pressure plate 421; punch 422; pressure ring 423; second drive mechanism 424; third limiting structure 425; second guide plate 426; third guide plate 427. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] The following is for reference. Figures 1-8 A pressing device 100 and a pressing method for a vehicle tailgate outer panel are described according to an embodiment of the present invention.

[0020] A pressing device 100 for a vehicle tailgate outer panel according to an embodiment of the present invention includes: Press 10 has an upper slide block 20 and a lower worktable 30. The upper slide block 20 and the lower worktable 30 are arranged in a vertical direction, and the upper slide block 20 can move toward or away from the lower worktable 30 in a vertical direction. The molding structure 40 is located between the upper slider 20 and the lower worktable 30. The molding structure 40 includes an upper mold 41 and a lower mold 42. The upper mold 41 is fixedly connected to the upper slider 20, and the lower mold 42 is fixedly connected to the lower worktable 30. The upper mold 41 and the lower mold 42 are arranged opposite each other in the vertical direction. The upper mold 41 includes a first pressure plate 411, which is movable in the vertical direction relative to the upper slider 20. The lower mold 42 includes a second pressure plate 421, which is movable in the vertical direction relative to the lower worktable 30.

[0021] Among them, the vertical direction is Figure 2 The Z-axis pressing device 100 for the outer panel of a vehicle's rear door includes a press 10. The press 10 has an upper slide block 20 and a lower worktable 30. The upper slide block 20 and the lower worktable 30 are arranged vertically, and the upper slide block 20 can move towards or away from the lower worktable 30 in the vertical direction. The upper slide block 20 is equipped with high-precision guide rails (such as hydrostatic guide rails or linear guide rails), which can ensure the stability of the movement trajectory during the pressing process by reducing friction and vibration. The lower worktable 30 serves as a machining reference surface and can adopt a cast bed (such as a closed four-column frame structure) or a hydrostatic lower worktable 30 design to reduce deformation by enhancing overall rigidity.

[0022] A pressing mold structure 40 is located between the upper slider 20 and the lower worktable 30. The pressing mold structure 40 includes an upper mold 41 and a lower mold 42. The upper mold 41 is fixedly connected to the upper slider 20. In some embodiments of the present invention, the upper mold 41 and the upper slider 20 can be fixedly connected by bolts, or by a clamping mechanism. However, the present invention is not limited to these methods, and the upper mold 41 and the upper slider 20 can also be fixedly connected in other ways, as long as the upper mold 41 and the upper slider 20 are fixedly connected. The upper slider 20 drives the upper mold 41 to move stably, which ensures the stability of the motion trajectory during the pressing process.

[0023] The lower die 42 is fixedly connected to the lower worktable 30. The lower die 42 and the lower worktable 30 can be fixedly connected by welding or by clamping bolts. However, the invention is not limited to these methods; the lower die 42 and the lower worktable 30 can also be fixedly connected in other ways, as long as they are fixedly connected. The lower worktable 30 adopts a high-rigidity material (such as cast iron or welded steel structure) and a closed frame design, which can withstand the huge reaction force during the pressing process. After the lower die 42 is fixed to the lower worktable 30, a stable support system is formed, effectively reducing vibration and deformation during processing. For example, in thick plate stamping or deep drawing processes, the fixed connection can prevent the lower die 42 from tilting due to uneven force, avoiding wrinkles or cracks at the workpiece edges, thereby improving the product quality of the workpiece.

[0024] The upper mold 41 and the lower mold 42 are arranged opposite each other in the vertical direction. The upper mold 41 includes a first pressure plate 411, which is movable in the vertical direction relative to the upper slider 20. The lower mold 42 includes a second pressure plate 421, which is movable in the vertical direction relative to the lower worktable 30. The first pressure plate 411 and the upper slider 20 can be slidably connected by a first guide plate 415. The second pressure plate 421 and the lower worktable 30 can be slidably connected by a third guide plate 427, so that the first pressure plate 411 can be moved in the vertical direction relative to the upper slider 20, and the second pressure plate 421 can be moved in the vertical direction relative to the lower worktable 30, thereby realizing material pressing and restoring the initial state. Furthermore, by having the first pressure plate 411 and the second pressure plate 421 participate in pressing simultaneously, uniform pressure can be applied, restricting the flow direction of the sheet material and ensuring that workpieces such as the rear door outer panel are deformed uniformly according to the shape of the mold cavity. By fixing the position of the sheet material, the first pressure plate 411 and the second pressure plate 421 reduce process fluctuations caused by the movement of the material, making parameters such as pressing force and speed easier to control. This can improve the flow and forming of the sheet material during the forming process of workpieces such as the rear door outer panel, as well as issues such as R-angle slip lines, thereby effectively improving the product quality of the workpiece. According to some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the upper mold 41 also includes a cavity mold 412, which is arranged around the first pressure plate 411 along the circumference of the first pressure plate 411. The first pressure plate 411 and the cavity mold 412 are movably connected, and the first pressure plate 411 can move relative to the cavity mold 412 in the vertical direction.

[0025] The die 412 is arranged around the first pressure plate 411 in the circumferential direction, and the first pressure plate 411 and the die 412 are movably connected. As a specific embodiment of the present invention, the first pressure plate 411 and the die 412 can be slidably connected by the first guide plate 415, so that the first pressure plate 411 can move relative to the die 412 in the vertical direction, and can guide the die 412 to maintain the correct movement trajectory during the pressing process, and can ensure that the sheet metal always flows along the predetermined path during continuous stamping, which can avoid scrap caused by deviation or tilting, and further improve the product quality of the workpiece. The first pressure plate 411 can press the sheet metal against the surface of the die 412 by external force (such as spring or hydraulic pressure), forming a stable frictional resistance. After the die 412 is arranged circumferentially around the first pressure plate 411, the resistance distribution of the sheet metal during the flow process is more uniform, avoiding wrinkling, cracking or springback caused by local stress concentration.

[0026] According to some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the lower die 42 also includes a punch 422, which is arranged around the second pressure plate 421 in the circumferential direction, and the second pressure plate 421 and the punch 422 are movably connected, and the second pressure plate 421 can move relative to the punch 422 in the vertical direction.

[0027] In this invention, the punch 422 is arranged around the second pressure plate 421 circumferentially, and the second pressure plate 421 and the punch 422 are movably connected. The second pressure plate 421 can move relative to the punch 422 in the vertical direction. As a specific embodiment of the invention, the second pressure plate 421 and the punch 422 can be slidably connected by the second guide plate 426, so that the second pressure plate 421 can move relative to the punch 422 in the vertical direction, and can guide the punch 422 to maintain the correct movement trajectory during the pressing process. It can also ensure that the sheet metal always flows along the predetermined path during continuous stamping, which can avoid scrap caused by deviation or tilting, and further improve the product quality of the workpiece. The second pressure plate 421 can press the sheet metal against the surface of the punch 422 by external force (such as spring or hydraulic pressure), forming a stable frictional resistance. After the punch 422 is arranged circumferentially around the second pressure plate 421, the resistance distribution of the sheet metal during the flow process is more uniform, avoiding wrinkling, cracking or springback caused by local stress concentration.

[0028] According to some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the pressing device 100 further includes a pressing ring 423, which is arranged around the punch 422 along the circumference of the punch 422, and the pressing ring 423 is movably connected to the punch 422 so that the pressing ring 423 can move relative to the punch 422 in the vertical direction.

[0029] The pressure ring 423 is arranged around the punch 422 along the circumference of the punch 422, and the pressure ring 423 is movably connected to the punch 422. As an embodiment of the present invention, the pressure ring 423 and the punch 422 can be slidably connected by a third guide plate 427 so that the pressure ring 423 can move relative to the punch 422 in the vertical direction. This ensures that the pressure ring 423 moves strictly along the axis of the punch 422 when moving in the vertical direction, avoiding deviation or jamming caused by lateral force, and significantly reducing wrinkling or cracking caused by uneven pressure.

[0030] The pressure ring 423 can move vertically along the punch 422. During the stamping process, the pressure is adjusted in real time according to the deformation requirements of the sheet metal. The circumferential surrounding structure of the pressure ring 423 cooperates with the punch 422 to guide the sheet metal to flow along a predetermined path. The pressure ring 423 adapts to the deformation requirements of different steps by moving vertically, ensuring that the flow speed of the sheet metal is consistent in each area, avoiding sudden changes in thickness or shape deviations, and thus further improving the product quality of the workpiece.

[0031] According to some embodiments of the present invention, such as Figure 2 As shown, the pressing device 100 further includes a first driving mechanism 413, which is connected to the first pressing plate 411. The first driving mechanism 413 is used to drive the first pressing plate 411 to move relative to the die 412 in the vertical direction.

[0032] The first driving mechanism 413 can be a cylinder, motor, or other type of driving mechanism, which can be selected appropriately according to actual conditions. In a specific embodiment of the invention, the first driving mechanism 413 can be a nitrogen cylinder. A nitrogen cylinder can provide stable and controllable elastic force, optimizing the workpiece forming quality. The elastic force of the nitrogen cylinder can be evenly applied to the contact surface of the first pressure plate 411, dispersing the stamping load and reducing local stress peaks. Furthermore, the nitrogen cylinder is small in size, saving space and cost.

[0033] The first driving mechanism 413 is connected to the first pressure plate 411. The first driving mechanism 413 is used to drive the first pressure plate 411 to move relative to the die 412 in the vertical direction, which enables the first pressure plate 411 to move stably, thereby optimizing the forming quality of the workpiece and improving the consistency of the product.

[0034] According to some embodiments of the present invention, such as Figure 4 As shown, the pressing device 100 further includes a second driving mechanism 424, which is connected to the second pressing plate 421. The second driving mechanism 424 is used to drive the second pressing plate 421 to move relative to the punch 422 in the vertical direction.

[0035] The second drive mechanism 424 can be a cylinder, motor, or other type of drive mechanism, which can be selected appropriately according to actual conditions. In a specific embodiment of the invention, the second drive mechanism 424 can be a nitrogen cylinder. A nitrogen cylinder can provide stable and controllable elastic force, optimizing the workpiece forming quality. The elastic force of the nitrogen cylinder can be evenly applied to the contact surface of the first pressure plate 411, dispersing the stamping load and reducing local stress peaks. Furthermore, the nitrogen cylinder is small in size, saving space and cost.

[0036] The second drive mechanism 424 is connected to the second pressure plate 421. The second drive mechanism 424 is used to drive the second pressure plate 421 to move relative to the punch 422 in the vertical direction, which enables the second pressure plate 421 to move stably, thereby optimizing the forming quality of the workpiece and improving the consistency of the product.

[0037] According to some embodiments of the present invention, such as Figure 3 As shown, the pressing device 100 further includes a first limiting structure 414, which is assembled with the first pressing plate 411 and the die 412. The first limiting structure 414 is used to limit the range of movement of the first pressing plate 411 in the vertical direction.

[0038] The first limiting structure 414 can be a limiting pin, a limiting bolt, or other limiting structure, which can be reasonably selected and set according to the actual situation. The first limiting structure 414 is assembled with the first pressure plate 411 and the die 412. The first limiting structure 414 is used to limit the range of movement of the first pressure plate 411 in the vertical direction, thereby preventing the first pressure plate 411 from moving indefinitely in the vertical direction away from the die 412.

[0039] Specifically, in the vertical direction, the first pressure plate 411 and the die 412 are slidably connected by the first guide plate 415, so that the first pressure plate 411 can move relative to the die 412 in the vertical direction. The first guide plate 415 extends in the vertical direction, and the length of the first guide plate 415 can be the stroke length of the first pressure plate 411 in the vertical direction. The first limiting structure 414 is provided at the end of the first guide plate 415 away from the upper slider 20, so as to restrict the first pressure plate 411 from moving downward in the vertical direction without restriction. The upper end wall of the die 412 is fixedly connected to the upper slider 20. The upper slider 20 can prevent the first pressure plate 411 from moving upward without restriction, thereby preventing the first pressure plate 411 from separating from the die 412, ensuring the safety and reliability of the pressure device 100.

[0040] According to some embodiments of the present invention, such as Figure 3 As shown, the pressing device 100 further includes a second limiting structure, which is assembled in cooperation with the second pressing plate 421 and the punch 422. The second limiting structure is used to limit the range of movement of the second pressing plate 421 in the vertical direction.

[0041] The second limiting structure can be a limiting pin, a limiting bolt, or other limiting structure, which can be reasonably selected and set according to the actual situation. The second limiting structure is assembled with the second pressure plate 421 and the punch 422. The second limiting structure is used to limit the range of movement of the second pressure plate 421 in the vertical direction, thereby preventing the second pressure plate 421 from moving indefinitely in the vertical direction away from the punch 422.

[0042] Specifically, in the vertical direction, the second pressure plate 421 and the punch 422 are slidably connected by the second guide plate 426, so that the second pressure plate 421 can move relative to the punch 422 in the vertical direction. The second guide plate 426 extends in the vertical direction, and the length of the second guide plate 426 can be the stroke length of the second pressure plate 421 in the vertical direction. The second limiting structure is provided at the end of the second guide plate 426 away from the lower worktable 30 to restrict the second pressure plate 421 from moving upward in the vertical direction without restriction. The lower end wall of the punch 422 is fixedly connected to the lower worktable 30. The lower worktable 30 can prevent the second pressure plate 421 from moving downward without restriction, thereby preventing the second pressure plate 421 from separating from the punch 422 and ensuring the safety and reliability of the pressure device 100.

[0043] Furthermore, the pressure ring 423 is arranged around the punch 422 circumferentially, and the pressure ring 423 is movably connected to the punch 422 so that the pressure ring 423 is movable relative to the punch 422 in the vertical direction. The pressure device 100 also includes a third limiting structure 425, which is assembled with the pressure ring 423 and the punch 422, and is used to limit the range of movement of the pressure ring 423 in the vertical direction.

[0044] The third limiting structure 425 can be a limiting pin, limiting bolt, or other limiting structure, which can be reasonably selected and set according to the actual situation. The third limiting structure 425 is assembled with the pressure ring 423 and the punch 422. The third limiting structure 425 is used to limit the range of movement of the pressure ring 423 in the vertical direction. This prevents the pressure ring 423 from moving unrestricted in the vertical direction away from the punch 422.

[0045] Specifically, in the vertical direction, the pressure ring 423 and the punch 422 are slidably connected by the third guide plate 427, so that the pressure ring 423 can move relative to the punch 422 in the vertical direction. The third guide plate 427 extends in the vertical direction, and the length of the third guide plate 427 can be the stroke length of the pressure ring 423 in the vertical direction. The third limiting structure 425 is provided at the end of the third guide plate 427 away from the lower worktable 30, so as to restrict the pressure ring 423 from moving upward in the vertical direction without restriction. The lower end wall of the punch 422 is fixedly connected to the lower worktable 30. The lower worktable 30 can prevent the pressure ring 423 from moving downward without restriction, thereby preventing the pressure ring 423 from separating from the punch 422, ensuring the safety and reliability of the pressure device 100.

[0046] According to some embodiments of the present invention, the pressing device 100 further includes a third driving mechanism, which is connected to the pressing ring 423 and is used to drive the pressing ring 423 to move relative to the punch 422 in the vertical direction.

[0047] The third driving mechanism can be a cylinder, motor, or other type of driving mechanism, which can be selected appropriately according to the actual situation. In a specific embodiment of the invention, the third driving mechanism can be a nitrogen cylinder. A nitrogen cylinder can provide stable and controllable elastic force, optimizing the workpiece forming quality. The elastic force of the nitrogen cylinder can be evenly applied to the contact surface of the pressure ring 423, dispersing the stamping load and reducing local stress peaks. Furthermore, the nitrogen cylinder is small in size, saving space and cost.

[0048] The third drive mechanism is connected to the pressure ring 423. The third drive mechanism is used to drive the pressure ring 423 to move vertically relative to the die 412, which enables the pressure ring 423 to move stably, thereby optimizing the forming quality of the workpiece and improving the consistency of the product.

[0049] The pressing method according to embodiments of the present invention, such as Figure 8 As shown, the pressing device for the outer panel of a vehicle tailgate, applied in the above embodiment, includes the following pressing method: S1, place the rear door outer panel material between the upper mold and the lower mold.

[0050] Placing the rear door outer panel material between the upper and lower dies is a crucial step in the stamping process of automotive body panels. Before operation, the press equipment needs to be inspected, the sheet material prepared, and the rear door outer panel material placed between the upper and lower dies. The position of the rear door outer panel material is then fixed using locating pins, guide pillars, or locating blocks to ensure accurate positioning.

[0051] S2, the upper slider drives the upper die to move vertically toward the lower die until the upper die contacts the pressure ring of the pressure device.

[0052] Among them, such as Figure 4 The diagram shows the initial state of the pressing device. After the outer panel of the rear door is fixed, the upper mold is driven by the upper slider to move vertically towards the lower mold until the upper mold contacts the pressing ring of the pressing device. Figure 5 As shown, the outer ring pressing process of the drawing is completed.

[0053] The pressure ring is used to hold down the outer panel of the tailgate to control the flow of the panel, prevent wrinkling, and ensure uniform flow of the outer panel, thereby obtaining high-quality stamped parts.

[0054] S3, the upper slider drives the upper die to move vertically toward the lower die, and at the same time drives the pressure ring to move vertically toward the punch, so that the first pressure plate and the second pressure plate come into contact.

[0055] Among them, such as Figure 5 As shown, after the upper die contacts the pressure ring of the pressure device, the outer ring pressure process of the drawing is completed. The upper slide block drives the upper die to continue moving vertically toward the lower die, and the drawing process begins. At the same time, the third drive mechanism drives the pressure ring to move vertically toward the punch, so that the first pressure plate contacts the second pressure plate, as shown. Figure 6 As shown, the inner ring pressing process of the drawing is completed.

[0056] S4, the upper slider drives the upper die to move vertically toward the lower die, and at the same time drives the pressure ring to move vertically toward the punch, and drives the second pressure plate to move vertically toward the punch until the stroke of the second pressure plate ends.

[0057] The first pressure plate is in contact with the second pressure plate, such as... Figure 6As shown, the inner ring drawing process is completed. The upper slider drives the upper die to continue moving towards the lower die in the vertical direction. At the same time, the third drive mechanism drives the pressure ring to move towards the punch in the vertical direction, and the second drive mechanism drives the second pressure plate to move towards the punch in the vertical direction until the stroke of the second pressure plate ends. The inner drawing forming process of the rear door outer panel window seal is completed.

[0058] S5, the upper slider drives the die to move vertically toward the punch, and at the same time drives the pressure ring to move vertically toward the punch.

[0059] In this process, after the second pressure plate completes its stroke, both the second and first pressure plates stop moving. The upper slide block drives the die to continue moving vertically toward the punch, while simultaneously driving the pressure ring to continue moving vertically toward the punch. This completes the entire drawing process of the rear door outer panel. Figure 5 As shown in the diagram, at this point, one working stroke of the rear door outer panel drawing die is completed.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pressing device for the outer panel of a vehicle's rear tailgate, characterized in that, include: A press, the press having an upper slide block and a lower worktable, the upper slide block and the lower worktable being arranged in a vertical direction, and the upper slide block being movable toward or away from the lower worktable in the vertical direction; A pressing mold structure is located between the upper slider and the lower worktable. The pressing mold structure includes an upper mold and a lower mold. The upper mold is fixedly connected to the upper slider, and the lower mold is fixedly connected to the lower worktable. The upper mold and the lower mold are arranged opposite each other along the vertical direction. The upper mold includes a first pressure plate, which is movable relative to the upper slider along the vertical direction. The lower mold includes a second pressure plate, which is movable relative to the lower worktable along the vertical direction.

2. The pressing device for the outer panel of a vehicle tailgate according to claim 1, characterized in that, The upper mold further includes a cavity mold, which is arranged around the first pressure plate along the circumference of the first pressure plate, and the first pressure plate is movably connected to the cavity mold, and the first pressure plate can move relative to the cavity mold along the vertical direction.

3. The pressing device for the outer panel of a vehicle tailgate according to claim 1, characterized in that, The lower die further includes a punch, which is arranged around the second pressure plate along the circumference of the second pressure plate, and the second pressure plate is movably connected to the punch. The second pressure plate can move relative to the punch in the vertical direction.

4. The pressing device for the outer panel of a vehicle tailgate according to claim 3, characterized in that, The pressing device further includes a pressing ring, which is arranged around the punch along the circumference of the punch and is movably connected to the punch so that the pressing ring is movable relative to the punch in the vertical direction.

5. The pressing device for the outer panel of a vehicle tailgate according to claim 2, characterized in that, The pressing device further includes: a first driving mechanism, which is connected to the first pressing plate, and the first driving mechanism is used to drive the first pressing plate to move relative to the die along the vertical direction.

6. The pressing device for the outer panel of a vehicle tailgate according to claim 3, characterized in that, The pressing device further includes a second driving mechanism, which is connected to the second pressing plate. The second driving mechanism is used to drive the second pressing plate to move relative to the punch in the vertical direction.

7. The pressing device for the outer panel of a vehicle tailgate according to claim 5, characterized in that, The pressing device further includes a first limiting structure, which is assembled with the first pressing plate and the die, and the first limiting structure is used to limit the range of movement of the first pressing plate along the vertical direction.

8. The pressing device for the outer panel of a vehicle tailgate according to claim 6, characterized in that, The pressing device further includes a second limiting structure, which is assembled with the second pressing plate and the punch, and the second limiting structure is used to limit the range of movement of the second pressing plate along the vertical direction.

9. The pressing device for the outer panel of a vehicle tailgate according to claim 4, characterized in that, The pressing device further includes a third driving mechanism, which is connected to the pressing ring and is used to drive the pressing ring to move relative to the punch in the vertical direction.

10. A pressing method, characterized in that, The pressing device for a vehicle tailgate outer panel according to any one of claims 1-9, the pressing method comprising: The outer panel of the rear door is placed between the upper mold and the lower mold; The upper slider drives the upper die to move along the vertical direction toward the lower die until the upper die contacts the pressure ring of the pressure device; The upper slider drives the upper die to move toward the lower die along the vertical direction, and at the same time drives the pressure ring to move toward the punch along the vertical direction, so that the first pressure plate contacts the second pressure plate; The upper slider drives the upper die to move toward the lower die along the vertical direction, and simultaneously drives the pressure ring to move toward the punch along the vertical direction, and drives the second pressure plate to move toward the punch along the vertical direction until the stroke of the second pressure plate ends; The upper slider drives the die to move toward the punch along the vertical direction, and simultaneously drives the pressure ring to move toward the punch along the vertical direction.

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