A composite forming transfer die and method for a vehicle tailgate

Abstract

The present application relates to a composite forming transfer die and method for a rear tail plate of an automobile, comprising an upper die and a lower die, a shearing station and a draw bag forming station are sequentially arranged on the lower die; a shearing cutter and a draw bag die are arranged on the upper die; a floating profiling block, a guide assembly and an elastic reset piece are arranged on the draw bag forming station; a groove for floating of the floating profiling block is arranged on the lower die, an integrally formed draw bag protruding block matched with the draw bag die is arranged at the bottom of the groove, and a through groove matched with the draw bag protruding block is arranged on the floating profiling block; the draw bag die comprises a die seat, and a forming groove is arranged on the lower surface of the die seat; the edge positioning, draw projection forming and flange shearing are combined into one, the positioning is performed by means of the edge of the flange, the precision of the draw projection can be well ensured, the integrally formed draw bag protruding block is adopted, the mold design difficulty can be effectively reduced and the product quality can be improved, and the flange after the draw projection is completed will be sheared, so that the subsequent action is not affected and the process is not increased.

Description

Technical Field

[0001] This invention relates to the field of automotive hardware processing technology, and more specifically, to a composite forming transfer mold and method for automotive rear tailgate. Background Technology

[0002] The rear tailgate of an automobile is a relatively large hardware component. The typical processing technology used is shearing forming followed by one-piece pull-out forming. Currently, the hardware forming molds used for pull-out forming usually consist of a forming punch and a forming die. The forming punch is usually composed of multiple protrusions assembled together. Due to the long length of the rear tailgate itself, the application of this mold structure places high demands on the positioning of the workpiece and the fit between the multiple protrusions. Any precision error in any area will directly affect the quality of the final product, resulting in a high defect rate and difficulty in mold debugging. Therefore, a composite forming transfer mold and method for automobile rear tailgates that can improve this situation is needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a transfer mold for composite molding of automobile rear tailgate, and a method for composite molding of automobile rear tailgate, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A composite forming transfer mold for a car rear tailgate is constructed, comprising an upper mold and a lower mold. The lower mold is sequentially provided with a shearing station and a forming station. The upper mold is provided with a shearing cutter corresponding to the shearing station and a forming die corresponding to the forming station. The forming station is provided with a floating contour block, a guide assembly for guiding the floating contour block's upward movement, and an elastic reset component for resetting the floating contour block. A workpiece positioning pin is provided on the upper surface of the floating contour block, and the forming die is provided with clearance holes to avoid the workpiece positioning pin. The lower mold is provided with a spacer for the floating contour block... The workpiece has a floating groove, the bottom of which is provided with an integrally formed pulling protrusion that mates with the pulling die. The floating contour block is provided with a through groove that mates with the pulling protrusion. The pulling die includes a die base, the lower surface of which is provided with a forming groove. After the workpiece is sheared at the shearing station, multiple discontinuous flanges are left on the edge. The lower die is provided with a flanging unit that sets an upward flanging angle for the multiple flanges and a cutting unit that cuts off the flanged flanges. The flanging operation occurs before the pulling operation, and the cutting operation occurs after the pulling operation and is triggered by the completion of the pulling operation.

[0006] The automotive rear tail panel composite molding transfer mold of the present invention includes a plurality of force-bearing blocks distributed on the upper surface of the floating contour block to bear the pressure of the die seat. The upper surface of the force-bearing blocks is flush with the upper surface of the floating contour block, and in the mold-open state, the upper surface of the force-bearing blocks is higher than the upper end point of the pull-out protrusion, and the longitudinal distance of the difference is the flanging stroke of the flanging unit.

[0007] The composite molding and transfer mold for automobile rear tailgate of the present invention, wherein the flange and the force-receiving block are arranged in a one-to-one correspondence.

[0008] The composite molding and transfer mold for automobile rear tailgate of the present invention includes a flanging unit comprising a plurality of flanging forming blocks corresponding one-to-one with the force-bearing blocks, wherein the flanging forming blocks are fixedly disposed on the lower mold.

[0009] The automotive rear tailgate composite forming transfer mold of the present invention includes a cutting unit comprising a shearing blade disposed directly below the flanging forming block and a cylinder for driving the shearing blade to move longitudinally.

[0010] The automotive rear tailgate composite molding transfer mold of the present invention includes a mounting cavity for mounting the cutting unit on the lower mold, and a plurality of cutting edges corresponding one-to-one with the shearing blade on the side of the concave mold base.

[0011] The automotive rear tailgate composite molding transfer mold of the present invention includes a touch switch at the bottom of the groove that triggers the cutting unit, and the touch switch is triggered by the floating contour block.

[0012] A method for composite molding of a car rear tailgate, using the aforementioned car rear tailgate composite molding transfer mold, wherein the method includes the following steps:

[0013] The sheet-shaped workpiece is fed into the shearing station by the robot arm. The upper and lower dies separate and join once. The shearing cutter cuts the workpiece into the required shape and leaves multiple discontinuous flanges on the sheared workpiece.

[0014] After shearing, the workpiece is fed into the forming station by the robot and placed on the floating contour block. The workpiece is positioned by the workpiece positioning system. The upper and lower dies open and close once. The die holder holds the edge of the workpiece and pushes the floating contour block downward. The flanging unit sets the angle for the flange to be turned upward. The flange after multiple flanging segments surrounds the die holder to complete the positioning. The forming protrusion and the forming groove cooperate to pull the workpiece. After the pulling is completed, the cutting unit is triggered to perform the cutting operation to cut off the flanged flange.

[0015] The beneficial effects of this invention are as follows: A sheet-like workpiece is fed into a shearing station by a robotic arm; the upper and lower dies perform a single mold separation and assembly; the shearing cutter cuts the workpiece into the required shape, leaving multiple discontinuous flanges on the sheared workpiece; the sheared workpiece is then fed into a forming station by a robotic arm and placed on a floating contour block, where a workpiece positioning device positions the workpiece; the upper and lower dies perform a single mold separation and assembly; the die holder presses the workpiece edge and pushes the floating contour block downwards; the flanging unit flanging the flange upwards at a set angle; the multi-flanged flanges surround the die holder for positioning; the forming groove and forming block cooperate to form a forming block; after forming, the cutting unit is triggered to cut off the flanged flanges; By applying the method of this application, flanging positioning, forming, and flange shearing are integrated into one unit. Positioning is achieved by flanging the flanges, which effectively ensures the accuracy of forming. Furthermore, the use of an integrated forming block effectively reduces mold design difficulty and improves product quality. Moreover, the flanges are sheared after forming, which does not affect subsequent actions or add any steps. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0017] Figure 1 This is a cross-sectional view of the composite molding transfer mold for the rear tailgate of an automobile according to a preferred embodiment of the present invention.

[0018] Figure 2 This is a top view of the floating contour block and the pull-out protrusion of the composite molding transfer mold for the rear tail section of an automobile according to a preferred embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the automotive rear tailgate composite molding transfer mold workpiece (with flange) according to a preferred embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0021] The preferred embodiment of the automobile rear tailgate composite molding transfer mold of the present invention, such as Figure 1 As shown, see also Figure 2 and Figure 3 The assembly includes an upper mold 1 and a lower mold 2. The lower mold 2 is provided with a shearing station and a pouch forming station in sequence. The upper mold 1 is provided with a shearing cutter corresponding to the shearing station and a pouch forming die 10 corresponding to the pouch forming station. The pouch forming station is provided with a floating contour block 20, a guide component for guiding the floating contour block 20 to float, and an elastic reset component 22 for resetting the floating contour block 20. The upper surface of the floating contour block 20 is provided with a workpiece positioning pin 23, and the pouch forming die 10 is provided with a clearance hole 100 to avoid the workpiece positioning pin. The lower mold 2 is provided with a groove 24 for the floating contour block to float, and the bottom of the groove 24 is provided with... There is an integrally formed packing protrusion 25 that mates with the packing die. The floating contour block 20 is provided with a through groove 200 that mates with the packing protrusion 25. The packing die 10 includes a die base 101, and the lower surface of the die base 101 is provided with a forming groove 102. After the workpiece 3 is sheared at the shearing station, multiple discontinuous flanges 30 are left on the edge. The lower die 2 is provided with a flanging unit that sets the angle for the multiple flanges 30 to be turned upward and a cutting unit 27 that cuts off the flanges 30 after they are turned. The flanging operation occurs before the packing operation, and the cutting operation occurs after the packing operation and is triggered by the completion of the packing operation.

[0022] The sheet-shaped workpiece is fed into the shearing station by a robot arm. The upper mold 1 and the lower mold 2 perform a mold opening and closing operation. The shearing cutter cuts the workpiece into the required shape and leaves multiple discontinuous flanges 30 on the cut workpiece 3. The cut workpiece is fed into the pouch forming station by a robot arm and placed on the floating contour block 20. The workpiece is positioned by the workpiece positioning pin 23. The upper mold 1 and the lower mold 2 perform a mold opening and closing operation. The die holder 101 presses the edge of the workpiece and pushes the floating contour block 20 downward. The flanging unit flanging the flanges 30 upward at a set angle. The multi-flanged flanges 30 surround the die holder to complete the positioning. The pouch forming protrusion 25 cooperates with the forming groove 102 to pouch the workpiece. After pouching is completed, the cutting unit 27 is triggered to perform the cutting operation to cut off the flanged flanges 30.

[0023] By applying the method of this application, the flange positioning, embossing and flange shearing are integrated into one. The positioning is achieved by the flange, which can ensure the accuracy of embossing. At the same time, the use of an integrated embossing block can effectively reduce the difficulty of mold design and improve product quality. Moreover, the flange is sheared after embossing, which will not affect subsequent operations and will not add any processes.

[0024] It should be noted that the shearing blade is an existing blade, which only needs to be slightly modified to leave a flange, and will not be elaborated on here.

[0025] Preferably, the upper surface of the floating contour block 20 is also provided with a plurality of force-bearing blocks 201 that bear the pressure of the die holder 101. The upper surface of the force-bearing blocks 201 is flush with the upper surface of the floating contour block 20, and the upper surface of the force-bearing blocks 201 is higher than the upper end point of the pull-out protrusion 25 when the mold is open. The longitudinal distance of the difference is the flanging stroke of the flanging unit. The purpose of using force-bearing blocks 201 is to ensure the strength of the force-bearing position and to facilitate leveling and adjustment. Preferably, the flange 30 is provided in a one-to-one correspondence with the force-bearing blocks 201 to ensure the strength of the flanging.

[0026] Preferably, the flanging unit includes multiple flanging forming blocks 260 corresponding one-to-one with the force-bearing blocks, and the flanging forming blocks are fixedly set on the lower mold 2. Before the mold is closed, the workpiece is located on the upper surface of the floating contour block 20. At this time, the lower surface of the flange 30 will abut against the upper end of the flanging forming block 260. When the mold is closed, the die holder 101 and the floating contour block 20 clamp the workpiece and drive the workpiece downward. The flange 30 and the flanging forming block 260 move relative to each other to complete the flanging. It should be noted that the flanging here does not need to be 90 degrees. A certain angle is sufficient to achieve the purpose of positioning. At the same time, a small angle flanging also facilitates the subsequent cutting operation.

[0027] Preferably, the cutting unit 27 includes a shearing blade 270 disposed directly below the flanging forming block and a cylinder 271 for driving the shearing blade to move longitudinally. The lower mold 2 is provided with a mounting chamber 28 for mounting the cutting unit. The side of the die holder 101 is provided with a plurality of cutting edges 103 corresponding one-to-one with the shearing blade 270. The bottom of the groove 24 is provided with a touch switch 240 for triggering the cutting unit. The touch switch is triggered by the floating contour block 20. When the convex shape is completed, the floating contour block 20 moves down to the position that triggers the touch switch 240. The cylinder drives the shearing blade to extend upward and cooperate with the corresponding cutting edge to cut the flange after flanging. The structure is simple, and the touch switch 240 is located in a relatively closed space, which makes it less likely to be accidentally triggered.

[0028] A method for composite molding of a car rear tailgate, using the aforementioned car rear tailgate composite molding transfer mold, includes the following steps:

[0029] The sheet-shaped workpiece is fed into the shearing station by the robot arm. The upper and lower dies separate and join once. The shearing cutter cuts the workpiece into the required shape and leaves multiple discontinuous flanges on the sheared workpiece.

[0030] After shearing, the workpiece is fed into the forming station by the robot and placed on the floating contour block. The workpiece is positioned by the workpiece positioning system. The upper and lower dies open and close once. The die holder holds the edge of the workpiece and pushes the floating contour block downward. The flanging unit sets the angle for the flange to be turned upward. The flange after multiple flanging segments surrounds the die holder to complete the positioning. The forming protrusion and the forming groove cooperate to pull the workpiece. After the pulling is completed, the cutting unit is triggered to perform the cutting operation to cut off the flanged flange.

[0031] By applying the method of this application, the flange positioning, embossing and flange shearing are integrated into one. The positioning is achieved by the flange, which can ensure the accuracy of embossing. At the same time, the use of an integrated embossing block can effectively reduce the difficulty of mold design and improve product quality. Moreover, the flange is sheared after embossing, which will not affect subsequent operations and will not add any processes.

[0032] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A composite forming transfer mold for a car rear tailgate, comprising an upper mold and a lower mold, characterized in that, The lower die is sequentially provided with a shearing station and a pouch forming station; the upper die is provided with a shearing cutter corresponding to the shearing station and a pouch forming die corresponding to the pouch forming station; the pouch forming station is provided with a floating contour block, a guide component for guiding the floating contour block to float, and an elastic reset component for resetting the floating contour block; the upper surface of the floating contour block is provided with a workpiece positioning pin, and the pouch forming die is provided with a clearance hole to avoid the workpiece positioning pin; the lower die is provided with a groove for the floating contour block to float, and the bottom of the groove is provided with a clearance hole to avoid the pouch forming die. The mold includes a pull-out protrusion, the bottom of which is integrally formed with the pull-out protrusion. The floating contour block has a through groove that mates with the pull-out protrusion. The pull-out die includes a die base, the lower surface of which has a forming groove. After the workpiece is sheared at the shearing station, multiple discontinuous flanges remain on its edge. The lower die is equipped with a flanging unit that sets an upward angle for the multiple flanges and a cutting unit that cuts off the flanged flanges. The flanging operation occurs before the pull-out operation, and the cutting operation occurs after the pull-out operation and is triggered by the completion of the pull-out operation.

2. The automotive rear tailgate composite molding transfer mold according to claim 1, characterized in that, The upper surface of the floating contour block is also provided with a plurality of force-bearing blocks that bear the pressure of the die seat. The upper surface of the force-bearing blocks is flush with the upper surface of the floating contour block, and in the mold opening state, the upper surface of the force-bearing blocks is higher than the upper end point of the pull-out protrusion, and the longitudinal distance of the difference is the flanging stroke of the flanging unit.

3. The automotive rear tailgate composite molding transfer mold according to claim 2, characterized in that, The flanges are configured in a one-to-one correspondence with the force-bearing blocks.

4. The automotive rear tailgate composite molding transfer mold according to claim 2 or 3, characterized in that, The flanging unit includes multiple flanging forming blocks that correspond one-to-one with the force-bearing block, and the flanging forming blocks are fixedly mounted on the lower mold.

5. The automotive rear tailgate composite molding transfer mold according to claim 4, characterized in that, The cutting unit includes a shearing blade disposed directly below the flanging forming block and a cylinder for driving the shearing blade to move longitudinally.

6. The automotive rear tailgate composite molding transfer mold according to claim 5, characterized in that, The lower die is provided with a mounting chamber for installing the cutting unit, and the side of the die holder is provided with a plurality of cutting edges corresponding one-to-one with the shearing blade.

7. The automotive rear tailgate composite molding transfer mold according to claim 1, characterized in that, The bottom of the groove is provided with a touch switch that triggers the cutting unit, and the touch switch is triggered by the floating contour block.

8. A method for composite molding of a car rear tailgate, using the car rear tailgate composite molding transfer mold as described in any one of claims 1-7, characterized in that, The method includes the following steps: The sheet-shaped workpiece is fed into the shearing station by the robot arm. The upper and lower dies separate and join once. The shearing cutter cuts the workpiece into the required shape and leaves multiple discontinuous flanges on the sheared workpiece. After shearing, the workpiece is fed into the forming station by the robot and placed on the floating contour block. The workpiece is positioned by the workpiece positioning system. The upper and lower dies open and close once. The die holder holds the edge of the workpiece and pushes the floating contour block downward. The flanging unit sets the angle for the flange to be turned upward. The flange after multiple flanging segments surrounds the die holder to complete the positioning. The forming protrusion and the forming groove cooperate to pull the workpiece. After the pulling is completed, the cutting unit is triggered to perform the cutting operation to cut off the flanged flange.

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