Negative angle hole flanging mechanism

Abstract

The utility model provides a negative angle hole flanging mechanism which comprises a lower die hole flanging male die and a lower die movable base, a lower die sliding block is guided on a lower die guide seat, a hole flanging female die function part is integrally arranged in the middle of the lower die movable base, vertical bosses are arranged on the two sides of the lower die movable base, the lower die movable base is guided, and a hole flanging female die function part is arranged on the hole flanging female die function part. A return nitrogen spring is connected to the lower die movable base, and the outer end of the return nitrogen spring is limited through a fixing block. An upper die sliding block for driving the lower die movable base is arranged at the position, corresponding to the vertical boss, of the vertical boss, and an upper die sliding block for driving the lower die sliding block is arranged at the position, corresponding to the lower die sliding block, of the lower die sliding block. The negative angle bending section hole flanging device is applied to hole flanging on a negative angle bending section, hole flanging operation is guaranteed, the percent of pass of parts is improved, cost is further reduced, the rear lower die movable base is far away from the inner end face of the bending section under the action of the return nitrogen spring, the parts with holes flanged can be easily taken down, and working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stamping dies and relates to a negative angle hole-turning mechanism. Background Art

[0002] In the processing of automobile parts, some stamping parts are formed by sheet metal, combined with Figure 1 As shown, there is a stamping part with a bending section, and a bending section C greater than 90º is provided at the end of the flat plate P. The angle A in the figure is an acute angle, which intuitively shows the bending section C greater than 90º. The bending section C forms a negative angle bend greater than 90º relative to the flat plate P, and a punching structure K is provided in the bending section greater than 90º. Usually, when processing this type of stamping part product, the hole is punched first, and then the bending section C is turned down. This punching scheme easily leads to inaccurate punching accuracy of the final product, unstable hole boundaries, resulting in unqualified product quality, and after the stamping is completed, it is difficult for the operator to pick up the part due to the completion of the punching. Summary of the invention

[0003] The utility model proposes a negative angle hole-turning mechanism, which is applied to a stamping die to realize hole-turning on a negative angle bending section after all the forming processes of the stamping product are completed, thus completely solving the problems of product hole-turning accuracy and unstable hole boundaries, reducing the product unqualified rate, and also solving the problem of taking out parts.

[0004] To achieve the purpose, the utility model adopts the following technical scheme: a negative angle hole turning mechanism, including a lower die hole turning punch, the lower die hole turning punch is fixed on a lower die slider, the lower die slider is guided on a lower die guide seat, and is characterized in that it also includes an upper die slider for driving the lower die slider to move, and a lower die movable base,

[0005] The middle position of the lower die movable base is integrally provided with a hole-flanging die functional part, and vertical bosses are arranged on both sides of the lower die movable base. The lower die movable base is guided by an upper guide block, a lower guide block, and a side guide block. A return nitrogen spring is connected to the lower die movable base, and the outer end of the return nitrogen spring is limited by a fixed block.

[0006] An upper die slide block for driving a lower die movable base is arranged at the vertical boss corresponding to its position, and an upper die slide block for driving the lower die slide block is arranged at the lower die slide block corresponding to its position.

[0007] Furthermore, vertical bosses are integrally provided on both sides of the lower mold movable base. This integral structure is convenient for processing and can better ensure the correct position of the vertical bosses on the lower mold movable base during processing without adjustment.

[0008] Furthermore, a lower wear-resistant block is installed on the side of the vertical boss, and an upper wear-resistant block is installed on the upper mold slider that drives the lower mold movable base. During operation, the upper wear-resistant block contacts the lower wear-resistant block, thereby driving the lower mold movable base; upper wear-resistant blocks and lower wear-resistant blocks are set, and after wear, only the upper wear-resistant blocks and the lower wear-resistant blocks need to be replaced, and they can be replaced quickly, thereby reducing the cost of use.

[0009] Furthermore, the number of return nitrogen springs is 2, and the number of fixed blocks is 2; two return nitrogen springs are provided so that the movable base of the lower mold is evenly stressed and can return quickly.

[0010] The beneficial effect of the utility model is that the utility model is applied to punching holes on a negative angle bending section, and the setting of the upper die slide block and the lower die movable base of the lower die movable base is driven to ensure the punching operation, thereby improving the qualified rate of parts and reducing costs. After the hole is punched, the lower die movable base is away from the inner end face of the bending section under the action of the return nitrogen spring, so the parts after the hole is punched can be easily removed, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a stamping part with a bending section in the prior art;

[0012] Figure 2 It is a three-dimensional diagram of the first state of the utility model;

[0013] Figure 3 It is a stereogram of the second state of the utility model.

[0014] As shown in the figure: 1-lower die movable base, 101-hole-flipping die functional part, 2-lower die hole-flipping punch, 3-upper die slider driving the lower die slider, 4-lower die slider, 401-lower die guide seat, 5-vertical boss, 6-lower wear-resistant block, 7-upper guide block, 8-side guide block, 9-lower guide block, 10-upper wear-resistant block, 11-upper die slider driving the lower die movable base, 12-nitrogen spring, 13-fixed block. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings.

[0016] Combination Figure 2 , Figure 3As shown, a negative angle hole turning mechanism comprises a lower die hole turning punch 2, an upper die slider 3 driving the lower die slider to move, and a lower die movable base 1, wherein the lower die hole turning punch 2 is fixed on the lower die slider 4, the lower die slider 4 is guided on the lower die guide seat 401, and a hole turning concave die functional part 101 is integrally provided at the middle position of the lower die movable base 1, vertical bosses 5 are provided on both sides of the lower die movable base 1, the lower die movable base is guided by an upper guide block 7, a lower guide block 9, and a side guide block 8, and a return nitrogen spring 12 is connected to the lower die movable base, and the outer end of the return nitrogen spring is limited by a fixed block 13; an upper die slider 11 driving the lower die movable base is provided at the vertical boss corresponding to its position, and an upper die slider 3 driving the lower die slider is provided at the lower die slider corresponding to its position;

[0017] A lower wear-resistant block 6 is installed on the side of the vertical boss 5, and an upper wear-resistant block 10 is installed on the upper mold slider that drives the lower mold movable base. During operation, the upper wear-resistant block contacts the lower wear-resistant block, thereby driving the lower mold movable base 1; upper wear-resistant blocks and lower wear-resistant blocks are set, and only the upper wear-resistant blocks and the lower wear-resistant blocks need to be replaced after wear, and they can be replaced quickly, thereby reducing the cost of use.

[0018] Combination Figure 2 As shown, vertical bosses 5 are integrally provided on both sides of the lower mold movable base. This integral structure is convenient for processing and can better ensure the correct position of the vertical bosses on the lower mold movable base during processing without adjustment.

[0019] like Figure 3 As shown, there are 2 return nitrogen springs and 2 fixed blocks; 2 return nitrogen springs are provided so that the movable base of the lower die is evenly stressed and can return quickly.

[0020] In the utility model, the upper wear-resistant block and the lower wear-resistant block are not necessary from the working principle. The upper mold slider driving the lower mold movable base is in direct contact with the side of the vertical boss, which can also drive the lower mold movable base to the working position.

[0021] In the utility model, an elastic unloading device is provided in the lower die hole-turning punch 2 to ensure that the lower die hole-turning punch 2 can return to its initial position under the action of the elastic unloading device after turning the hole; the elastic unloading device and its setting structure provided on the lower die hole-turning punch 2 belong to conventional technology in the prior art and will not be described in detail here.

[0022] The use method of the utility model is described as follows: when in use, the upper die slider driving the lower die movable base and the upper die slider driving the lower die movable base are both fixed on the upper die of the mold, and other parts are installed in the lower die of the mold; when working, during the process of closing the upper die and the lower die, the upper die slider driving the lower die movable base first moves the lower die movable base to the working position, and the hole-turning die functional part 101 on the lower die movable base is in close contact with the inner end surface of the bending section (negative angle bending section) of the part with a bending angle greater than 90°; then, the upper die slider driving the lower die slider to move drives the lower die slider to move, thereby driving the lower die hole-turning punch 2 to turn the hole, and after the hole is turned, the lower die hole-turning punch 2 returns to the initial position (non-working position) under the action of the elastic unloading device therein.

Claims

1. A negative angle hole turning mechanism, comprising a lower die hole turning punch, the lower die hole turning punch is fixed on a lower die slide, and the lower die slide is guided on a lower die guide seat, characterized in that: It also includes an upper die slider that drives the lower die slider to move, and a lower die movable base. The middle position of the lower die movable base is integrally provided with a hole-flanging die functional part, and vertical bosses are arranged on both sides of the lower die movable base. The lower die movable base is guided by an upper guide block, a lower guide block, and a side guide block. A return nitrogen spring is connected to the lower die movable base, and the outer end of the return nitrogen spring is limited by a fixed block. An upper die slide block for driving a lower die movable base is arranged at the vertical boss corresponding to its position, and an upper die slide block for driving the lower die slide block is arranged at the lower die slide block corresponding to its position.

2. A negative angle hole turning mechanism according to claim 1, characterized in that: Vertical bosses are integrally arranged on both sides of the lower mold movable base.

3. A negative angle hole turning mechanism according to claim 2, characterized in that: A lower wear block is installed on the side of the vertical boss, and an upper wear block is installed on the upper die slide that drives the lower die movable base. During operation, the upper wear block contacts the lower wear block, thereby driving the lower die movable base.

4. A negative angle hole turning mechanism according to claim 1 or 3, characterized in that: Furthermore, the number of return nitrogen springs is 2, and the number of fixed blocks is 2.

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