A back door drawing die support device and method

Abstract

A back door drawing die support device and method, belonging to the field of drawing die technology, solves the problem in the prior art that due to the great influence of air tightness of the air pipe, air leakage will cause the support action to react slowly, and under normal operation, the support action rhythm is difficult to keep consistent with the press action rhythm. The device includes a support rod, a support rod driving block, a lifting device, a locking device and a lower die base cast iron surface; the support rod is fixed on the support rod driving block; the top of the lifting device is connected to the support rod driving block, and the bottom is fixed on the lower die base cast iron surface; both sides of the lifting device are connected to the locking device; the bottom of the locking device is fixed on the lower die base cast iron surface.

Description

Technical Field

[0001] The invention relates to the technical field of drawing dies, and in particular to a material supporting device and method for a rear door drawing die. Background Art

[0002] During the stamping production process of the inner panel of the rear door of the car, the sheet material will collapse and deform after the drawing die is fed, resulting in wrinkles in the drawing forming and unstable forming state. In the prior art, if the sheet material is too large, the support rod will directly retreat after the pressure ring contacts, and the middle may collapse. If the retreat is too late, the support rod will participate in the punch forming, which is incorrect. It is difficult to find the balance point between the two. At the same time, the prior art generally adopts a pneumatic support structure, which is greatly affected by the air tightness of the air pipe. Sometimes air leakage will make the support action slow to respond, and under normal operation, the support action rhythm is difficult to keep consistent with the press action rhythm.

[0003] Prior art, patent document CN112317616A discloses "a back door inner panel drawing die with a supporting device", comprising an upper die and a lower die seat facing each other, a punch mounted on the lower die seat, a pressure ring mounted between the punch and the lower die seat, characterized in that it also includes a supporting device, the supporting device is mounted on the lower die seat through the buckling of the punch, the supporting device comprises: a body, a pier block, a lifting insert, a travel limit bolt and a bottom push rod, the body is provided with a stepped through hole, the lower die seat is provided with a connecting The threaded hole is connected, the travel limit bolt is arranged in the stepped through hole and the lower end is connected to the lower die seat through the connecting threaded hole, the body can move axially along the travel limit bolt, one end of the jacking insert is fixed to the top of the body, the punch is provided with a jacking through hole, one end of the bottom push rod is fixed to the bottom of the body, the lower die seat is provided with a push rod through hole, the pier block is fixed to the bottom of the body, and when the jacking insert and the bottom push rod move in the jacking through hole and the push rod through hole respectively, the pier block can contact or disengage from the top of the lower die seat. Patent document CN207629023U discloses "a drawing die support positioning mechanism", the positioning mechanism includes a support body, a positioning block, a support block and an adjustable reset device, an adjustment block for adjusting the position and the rotation direction is provided directly below the support body, a positioning block for positioning is installed on the side wall of the support body, the support block is rotatably connected to the top of the support, the support block includes a support end for supporting and a reset end for maintaining the level, and an adjustable reset device is provided at the reset end of the support block. The invention is a self-adjustable counterweight drawing die support positioning mechanism. The weight of all the plates borne on the support block is controlled by installing a reset device on the bracket.

[0004] In summary, the prior art is greatly affected by the air tightness of the air pipe, and air leakage will cause the support action to react slowly, and under normal operation, the support action rhythm is difficult to keep consistent with the press action rhythm. Summary of the invention

[0005] The present invention solves the problem in the prior art that, due to the great influence of the air tightness of the air pipe, air leakage will cause the material support action to react slowly, and under normal operation, the material support action rhythm is difficult to keep consistent with the press action rhythm.

[0006] The back door drawing die support device of the present invention comprises a support rod 2, a support rod driving block 3, a lifting device, a locking device and a lower die base cast iron surface 13;

[0007] The support rod 2 is fixed on the support rod driving block 3;

[0008] The top of the lifting device is connected to the support rod driving block 3, and the bottom is fixed on the cast iron surface 13 of the lower die base;

[0009] Both sides of the lifting device are connected to the locking device;

[0010] The bottom of the locking device is fixed on the cast iron surface 13 of the lower die base.

[0011] Furthermore, in one embodiment of the present invention, the initial state of the supporting rod 2 is an ejection state.

[0012] Further, in one embodiment of the present invention, the lifting device comprises a lifting spring body movable device 4, a lifting spring body fixing device 5 and a lifting spring core 6;

[0013] The lifting spring body movable device 4 is connected to the lifting spring body fixing device 5 through the lifting spring core 6.

[0014] Furthermore, in one embodiment of the present invention, locking triangle blocks are provided on both sides of the lifting spring body movable device 4.

[0015] Further, in one embodiment of the present invention, the locking device comprises a locking spring body movable device 7, a locking spring body fixing device 8, a locking spring core 9, a cast iron column 10 and a spring driving device;

[0016] The locking spring body movable device 7 is connected to the locking spring body fixing device 8 through the locking spring core 9;

[0017] The locking spring body fixing device 8 is fixed on the cast iron column 10;

[0018] The spring driving device is connected with the locking spring body movable device 7 by pushing.

[0019] Further, in one embodiment of the present invention, the spring driving device includes a locking spring driving block 11 and a press push rod 12;

[0020] The locking spring driving block 11 is fixed on the press top rod 12 .

[0021] Furthermore, in one embodiment of the present invention, a driving triangle block is provided at the bottom of the locking spring body movable device 7 .

[0022] The present invention discloses a back door drawing die supporting method, which is implemented by using a back door drawing die supporting device described in the above method, and comprises the following steps:

[0023] Step S1, when the press slide moves downward and the upper die contacts the blank holder, the cast iron block 1 extending outward from the lowest point of the drawing die pressing surface contacts the support rod driving block 3 and continues to move downward;

[0024] Step S2, the support rod driving block 3 and the lifting spring body movable device 4 compress the lifting spring core 6, and when the press slide approaches the bottom dead point, the lifting spring body movable device 4 is locked. After the molding is completed, the robot takes away the workpiece;

[0025] Step S3, after the workpiece is removed, the press slide continues to move upward, and when the blank holder is lifted up by the press push rod 12, the lifting locking spring drive block 11 is synchronously driven to unlock the lifting spring body movable device 4;

[0026] Step S3, the lifting spring body movable device 4 moves upward to the initial position under the stretching action of the lifting spring core 6, while driving the support rod driving block 3 and the support rod 2 back to the initial position, and the robot places the sheet metal into the drawing process positioning to complete the sheet metal support.

[0027] Further, in one embodiment of the present invention, in step S2, the process of locking the lifting spring body movable device 4 is:

[0028] After the two locking triangle blocks on the lifting spring body movable device 4 pass over the locking spring body movable device 7, the lifting spring body movable device 4 is locked by the spring-pushing action of the locking spring core 9.

[0029] Further, in one embodiment of the present invention, in step S3, the process of unlocking the lifting spring body movable device 4 is:

[0030] The locking spring driving block 11 presses the driving triangle block on the locking spring body movable device 7 to compress the locking spring core 9 , so that the locking spring body movable device 7 releases the locking of the lifting spring body movable device 4 .

[0031] The present invention solves the problem in the prior art that due to the great influence of the air tightness of the trachea, air leakage will cause the material support action to react slowly, and under normal operation, the material support action rhythm is difficult to keep consistent with the press action rhythm. Specific beneficial effects include:

[0032] 1. The back door drawing die supporting device described in the present invention pushes the mechanical mechanism to drive the supporting rod downward by the downward movement of the slider, and triggers the mechanical mechanism when the press top rod moves upward to release the locked state, so that the supporting rod moves upward. The mechanical structure is completely triggered by the press action to drive the supporting rod to realize the lifting action. Because it is the same mechanical system rather than two systems of mechanical and pneumatic circuits, the consistency of the supporting action can be guaranteed.

[0033] 2. The back door drawing die supporting device described in the present invention is a simple mechanical system with little exposure, so the probability of failure caused by human contact with the air pipeline is small.

[0034] 3. In the back door drawing die supporting device described in the present invention, the supporting rod driving block and the supporting rod are driven to move downward synchronously, and the supporting rod always supports the sheet material. The supporting rod is detachable by threaded connection, and not only can the height be adjusted by adding or removing gaskets, but also does not need to participate in forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 This is a diagram of a back door drawing die supporting device as described in a specific implementation method, wherein 1 is a cast iron surface at the same height, 2 is a supporting rod, 3 is a supporting rod driving block, 4 is a lifting spring body movable device, 5 is a lifting spring body fixing device, 6 is a lifting spring core, 7 is a locking spring body movable device, 8 is a locking spring body fixing device, 9 is a locking spring core, 10 is a cast iron column, 11 is a locking spring driving block, 12 is a press top rod, and 13 is a lower die base cast iron surface. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe various embodiments of the present invention in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] A back door drawing die support device according to this embodiment includes a support rod 2, a support rod driving block 3, a lifting device, a locking device and a lower die base cast iron surface 13;

[0039] The support rod 2 is fixed on the support rod driving block 3;

[0040] The top of the lifting device is connected to the support rod driving block 3, and the bottom is fixed on the cast iron surface 13 of the lower die base;

[0041] Both sides of the lifting device are connected to the locking device;

[0042] The bottom of the locking device is fixed on the cast iron surface 13 of the lower die base.

[0043] In this embodiment, the initial state of the supporting rod 2 is an ejection state.

[0044] In this embodiment, the lifting device includes a lifting spring body movable device 4, a lifting spring body fixing device 5 and a lifting spring core 6;

[0045] The lifting spring body movable device 4 is connected to the lifting spring body fixing device 5 through the lifting spring core 6.

[0046] In this embodiment, locking triangle blocks are provided on both sides of the lifting spring body movable device 4.

[0047] In this embodiment, the locking device includes a locking spring body movable device 7, a locking spring body fixing device 8, a locking spring core 9, a cast iron column 10 and a spring driving device;

[0048] The locking spring body movable device 7 is connected to the locking spring body fixing device 8 through the locking spring core 9;

[0049] The locking spring body fixing device 8 is fixed on the cast iron column 10;

[0050] The spring driving device is connected with the locking spring body movable device 7 by pushing.

[0051] In this embodiment, the spring driving device includes a locking spring driving block 11 and a press push rod 12;

[0052] The locking spring driving block 11 is fixed on the press top rod 12 .

[0053] In this embodiment, a driving triangle block is provided at the bottom of the locking spring body movable device 7 .

[0054] A back door drawing die supporting method described in this embodiment is implemented by using a back door drawing die supporting device described in the above embodiment, and includes the following steps:

[0055] Step S1, when the press slide moves downward and the upper die contacts the blank holder, the cast iron block 1 extending outward from the lowest point of the drawing die pressing surface contacts the support rod driving block 3 and continues to move downward;

[0056] Step S2, the support rod driving block 3 and the lifting spring body movable device 4 compress the lifting spring core 6, and when the press slide approaches the bottom dead point, the lifting spring body movable device 4 is locked. After the molding is completed, the robot takes away the workpiece;

[0057] Step S3, after the workpiece is removed, the press slide continues to move upward, and when the blank holder is lifted up by the press push rod 12, the lifting locking spring drive block 11 is synchronously driven to unlock the lifting spring body movable device 4;

[0058] Step S3, the lifting spring body movable device 4 moves upward to the initial position under the stretching action of the lifting spring core 6, while driving the support rod driving block 3 and the support rod 2 back to the initial position, and the robot places the sheet metal into the drawing process positioning to complete the sheet metal support.

[0059] In this embodiment, in step S2, the process of locking the lifting spring body movable device 4 is as follows:

[0060] After the two locking triangle blocks on the lifting spring body movable device 4 pass over the locking spring body movable device 7, the lifting spring body movable device 4 is locked by the spring-pushing action of the locking spring core 9.

[0061] In this embodiment, in step S3, the process of unlocking the lifting spring body movable device 4 is as follows:

[0062] The locking spring driving block 11 presses the driving triangle block on the locking spring body movable device 7 to compress the locking spring core 9 , so that the locking spring body movable device 7 releases the locking of the lifting spring body movable device 4 .

[0063] This embodiment is based on a back door drawing die support device, combined with Figure 1 To better understand this implementation, a practical implementation is provided:

[0064] A back door drawing die support device includes a support rod 2 fixed on a support rod driving block 3, the upper part of the support rod driving block 3 is at the same height as the highest part of the drawing die pressure ring, the main body is located outside the lower die pressure ring, and the equal-height cast iron block 1 extending outside the lowest part of the drawing die pressure surface is used to press down the support rod driving block 3. The lifting spring body movable device 4 has two locking triangle blocks, the lifting spring body fixing device 5 is fixed to the inner surface 13 of the lower die seat of the die by welding or screw connection, the lifting spring body movable device 4 is connected to the lifting spring body fixing device 5 through the lifting spring core 6, and realizes the rebound reset after being pressed down. The locking spring body movable device 7 has a driving triangle block below, which is connected to the locking spring body fixing device 8 through the locking spring core 9, and realizes the compression and rebound action under the action of the press top rod 12 pushing the locking spring driving block 11. The locking spring body fixing device 8 is fixed to the cast iron column 10 by welding or screw connection, and the cast iron column 10 is welded and fixed to the inner surface 13 of the lower die base of the mold.

[0065] This embodiment is based on a back door drawing die support method and provides a practical implementation method:

[0066] Working principle: The support rod 2 is initially in the ejection state, supporting the upper sheet material and preventing it from collapsing. When the press slide moves downward, the cast iron block 1 of equal height extending outward from the lowest point of the drawing die pressing surface moves downward synchronously with the upper die. When the upper die contacts the blank holder, the cast iron block 1 of equal height extending outward from the lowest point of the drawing die pressing surface moves downward synchronously with the support rod driving block 3, and then continues to move downward. The support rod driving block 3 moves downward synchronously with the support rod 2, and the state presented is that the support rod always supports the sheet material, but does not participate in the forming. In order to accurately realize this function, the support rod 2 is detachable with threaded connection, and the height can be adjusted by adding or subtracting gaskets. The support rod driving block 3 and the lifting spring body movable device 4 compress the lifting spring core 6. When the press is close to the lower dead point, the two locking triangle blocks on the lifting spring body movable device 4 pass over the locking spring body movable device 7 and are locked by the locking spring core 9, so that the support rod no longer actively moves upward after the lower dead point. After the molding is completed, the robot arm will not be affected by the upward movement of the press slide to take away the workpiece.

[0067] After the workpiece is removed, the slider continues to move upward. When the blank holder is lifted by the drawing push rod, the locking spring drive block 11 is lifted synchronously. The locking spring drive block 11 presses the driving triangle block on the locking spring body movable device 7, compressing the locking spring core 9, so that the locking spring body movable device 7 unlocks the lifting spring body movable device 4. The lifting spring body movable device 4 moves upward to the initial position under the tensile effect of the lifting spring core 6, driving the support rod drive block 3 and the support rod 2 to return to the initial position. The manipulator places the sheet from the centering table to the drawing process positioning, and the sheet can be supported. In this way, the support action and the press action rhythm can be completely consistent, preventing the sheet from collapsing during the forming process.

[0068] The above is a detailed introduction to a rear door drawing die support device and method proposed in the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A back door drawing die support device, characterized in that: The device comprises a support rod (2), a support rod driving block (3), a lifting device, a locking device and a lower die base cast iron surface (13); The support rod (2) is fixed on the support rod driving block (3); The top of the lifting device is connected to the support rod driving block (3), and the bottom is fixed on the cast iron surface (13) of the lower die base; Both sides of the lifting device are connected to the locking device; The bottom of the locking device is fixed on the cast iron surface (13) of the lower die base; The locking device comprises a locking spring body movable device (7), a locking spring body fixing device (8), a locking spring core (9), a cast iron column (10) and a spring driving device; The locking spring body movable device (7) is connected to the locking spring body fixing device (8) via a locking spring core (9); The locking spring body fixing device (8) is fixed on the cast iron column (10); The spring driving device is connected to the locking spring body movable device (7) by pushing; The lifting device comprises a lifting spring body movable device (4), a lifting spring body fixing device (5) and a lifting spring core (6); The lifting spring body movable device (4) is connected to the lifting spring body fixing device (5) via the lifting spring core (6); Locking triangle blocks are provided on both sides of the lifting spring body movable device (4); The spring drive device comprises a locking spring drive block (11) and a press push rod (12); The locking spring driving block (11) is fixed on the press top rod (12); A driving triangle block is arranged at the bottom of the locking spring body movable device (7).

2. A back door drawing die support device according to claim 1, characterized in that: The initial state of the supporting rod (2) is an ejection state.

3. A method for supporting a back door drawing die, characterized in that: The method is implemented by using a back door drawing die support device according to claim 1, comprising the following steps: Step S1, when the press slide moves downward and the upper die contacts the blank holder, the cast iron block (1) extending outward from the lowest point of the drawing die pressing surface contacts the support rod driving block (3) and continues to move downward; Step S2, the support rod driving block (3) and the lifting spring body movable device (4) compress the lifting spring core (6), when the press slide approaches the lower dead point, the lifting spring body movable device (4) is locked, and after the molding is completed, the robot takes away the workpiece; Step S3, after the workpiece is removed, the press slide continues to move upward, and when the blank holder is lifted up by the press push rod (12), the lifting locking spring drive block (11) is synchronously driven to unlock the lifting spring body movable device (4); In step S3, the lifting spring body movable device (4) moves upward to the initial position under the tensile action of the lifting spring core (6), while driving the support rod driving block (3) and the support rod (2) back to the initial position, and the robot places the sheet metal into the positioning of the drawing process, completing the sheet metal support.

4. A back door drawing die support method according to claim 3, characterized in that: In step S2, the process of locking the lifting spring body movable device (4) is as follows: After the two locking triangle blocks on the lifting spring body movable device (4) pass over the locking spring body movable device (7), the lifting spring body movable device (4) is locked by the spring-pushing action of the locking spring core (9).

5. A back door drawing die support method according to claim 3, characterized in that: In step S3, the process of unlocking the lifting spring body movable device (4) is as follows: The locking spring driving block (11) presses the driving triangle block on the locking spring body movable device (7) to compress the locking spring core (9), so that the locking spring body movable device (7) releases the locking of the lifting spring body movable device (4).

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