Bending die with turnover movable block

Abstract

The utility model provides a bending die with turnover movable blocks, which relates to the field of metal stamping dies and comprises an upper bending cutter, a lower die fixing block and a pair of turnover movable blocks movably connected with the lower die fixing block. The overturning movable block and the lower die fixing block are connected through tension springs on the front side and the rear side. A movable block limiting protrusion is arranged on the outer side of the overturning movable block. A clearance groove is formed between the two grooves and is used for accommodating a bent part of a workpiece; and the bending upper cutter is positioned right above the clearance groove. During bending operation, the overturning movable block can overturn inwards through deformation of the tension spring. According to the improved lower die structure, sliding friction between the lower surface of the workpiece and an opening of the V-shaped groove formed by the lower die is avoided, so that the surface quality of the workpiece is guaranteed, meanwhile, the service life of the lower die fixing block is prolonged, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal stamping die field, specifically is a bending die with turnover movable block. BACKGROUND

[0002] The bending and forming of metal plate are the common procedures in die stamping processing. According to the specific size, surface requirement and processing precision requirement of workpiece, it is very important to design suitable die structure to reduce the procedure and production cost to the greatest extent.

[0003] When the existing general bending die is processed, V-shaped forming groove is formed in the upper part of the lower die, and the workpiece plate is bent and deformed under the pressure of the upper and lower dies. However, while the workpiece plate is bent and deformed, the workpiece material will slide at the opening of the V-shaped groove, causing the V-shaped groove surface of the workpiece and the lower die fixed block to be worn at the same time, and scratches are generated on the contact surface of the workpiece and the V-shaped groove opening. It cannot meet the surface finish requirement of the workpiece, and additional polishing process is required. UTILITARIAN CONTENT

[0004] The utility model aims at providing a bending die with turnover movable block to solve the problems mentioned in the background art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted is as follows: a bending die with turnover movable block, comprising a bending upper knife, a lower die fixed block and a pair of turnover movable blocks movably connected with the lower die fixed block, the turnover movable block is placed in the groove on the upper part of the lower die fixed block, and the turnover movable block and the lower die fixed block are connected by the tension spring on the front and rear sides of the two; the outer side of the turnover movable block is provided with movable block limiting protrusion; an empty knife groove is arranged between the two grooves, and the bending upper knife is located directly above the empty knife groove. During bending operation, the turnover movable block can be turned inward by the deformation of the tension spring.

[0006] Specifically, the lower die fixed block and the turnover movable block are respectively provided with fixed block tension spring fixing pin and movable block tension spring fixing pin for fixing the two ends of the tension spring.

[0007] Specifically, two tension springs are respectively arranged on the front and rear sides of the lower die fixed block.

[0008] Further improvement, the outer side of the groove is provided with movable block limiting table, and the position thereof corresponds to the movable block limiting protrusion.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] The improved die structure avoids the sliding friction of the lower surface of the workpiece and the opening of the V-shaped groove formed by the lower die, thereby ensuring the surface quality of the workpiece, prolonging the service life of the lower die fixed block and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A structure diagram of a bending die in the prior art;

[0012] Figure 2 A schematic diagram of problems existing in the bending process in the prior art, wherein the arrow direction is the sliding direction of the plate-shaped workpiece during bending;

[0013] Figure 3 A structure diagram of an embodiment of the present application;

[0014] Figure 4 A perspective view of the lower die fixed block;

[0015] Figure 5 A front view of the lower die fixed block;

[0016] Figure 6 A perspective view of the turnover movable block;

[0017] Figure 7 A front view of the turnover movable block;

[0018] Figure 8 A working state perspective view of an embodiment of the present application;

[0019] Figure 9 A state diagram of an embodiment of the present application before bending the workpiece;

[0020] Figure 10 A state diagram of an embodiment of the present application when bending the workpiece;

[0021] Figure 11 A workpiece product diagram after two times of bending.

[0022] The signs in the drawings are as follows:

[0023] 1-bending upper knife, 2-lower die fixed block, 3-turnover movable block, 4-tension spring, 5-plate-shaped workpiece, 6-empty knife groove, 7-movable block limiting table, 8-fixed block tension spring fixing pin, 9-movable block tension spring fixing pin, 10-movable block limiting protrusion, 11-V-shaped groove. DETAILED DESCRIPTION

[0024] The present application will be further explained and described below in combination with the drawings and embodiments. It should be pointed out that all other embodiments obtained by those skilled in the art without making creative efforts on the basis of the embodiments in the present application belong to the protection scope of the present application.

[0025] In the prior art, as shown in Figure 1 and Figure 2 , the die structure used in the bending of plate-shaped workpieces is a lower die fixed block 2 with a V-shaped groove 11 in the middle. In the working state of this bending die, the plate-shaped workpiece 5 will slide and rub against the V-shaped groove 11, which will easily scratch the groove and the workpiece. Thus, a subsequent polishing process is required to produce qualified products. In view of this situation, the structure of the lower die is improved and designed.

[0026] Embodiment: As shown in Figures 3-7 , a bending die with a turnover movable block, comprising a bending upper knife 1, a lower die fixed block 2, and a pair of turnover movable blocks 3 movably connected with the lower die fixed block 2. The turnover movable blocks 3 are placed in the grooves on the upper part of the lower die fixed block 2, and the turnover movable blocks 3 and the lower die fixed block 2 are connected by the pull springs 4 on the front and back sides of the two. The outer side of the turnover movable blocks 3 is provided with movable block limiting protrusions 10, and the outer side of the grooves is provided with movable block limiting tables 7, the positions of which correspond to the positions of the movable block limiting protrusions 10. An empty knife groove 6 is provided between the two grooves for accommodating the bending part of the plate-shaped workpiece 5, and the bending upper knife 1 is located directly above the empty knife groove 6. The lower die fixed block 2 and the turnover movable blocks 3 are respectively provided with fixed block pull spring fixing pins 8 and movable block pull spring fixing pins 9, and the two ends of the pull springs 4 are respectively sleeved on the fixed block pull spring fixing pins 8 and the movable block pull spring fixing pins 9.

[0027] Preferably, two pull springs 4 are respectively installed on the front and back sides of the lower die fixed block 2.

[0028] As shown in Figures 8-10 , during the bending operation, the turnover movable blocks 3 can be turned inward by the deformation of the pull springs 4, and after the bending operation is completed, the turnover movable blocks 3 are reset under the action of the pulling force of the pull springs 4. During the forming process, the plate-shaped workpiece 5 will not slide relative to the lower die fixed block 2, so that the sliding friction between the plate-shaped workpiece 5 and the forming groove of the lower die fixed block 2 is avoided, and the subsequent polishing process is reduced.

[0029] Figure 11 The product diagram of the workpiece after being bent twice by the bending die is shown. The bending part near the bending part is relatively smooth.

[0030] When the turnover movable blocks 3 in the embodiment are worn, the pull springs 4 only need to be disassembled for replacement at any time, thereby effectively prolonging the service life of the lower die fixed block 2.

[0031] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary, but not restrictive, the scope of the present application being defined by the appended claims rather than the above description and explanation, and all changes falling within the meaning and the scope of the equivalent elements of the claims are intended to be embraced in the present application. At the same time, no figure reference in the claims should be considered as limiting the claims concerned.

Claims

1. A bending die with turnover movable block, comprising a bending upper die (1), a lower die fixed block (2) and a pair of turnover movable blocks (3) movably connected with the lower die fixed block, the turnover movable blocks (3) being placed in the grooves on the upper part of the lower die fixed block (2), characterized in that: The turnover movable block (3) and the lower mold fixed block (2) are connected by the pull spring (4) on the front and back sides of the two; the outer side of the turnover movable block (3) is provided with a movable block limiting protrusion (10); an empty knife groove (6) is arranged between the two grooves, and the bending upper knife (1) is located directly above the empty knife groove (6); during the bending operation, the turnover movable block (3) can be turned inward by the deformation of the pull spring (4).

2. The bending die with a turnover movable block according to claim 1, characterized in that: The lower mold fixed block (2) and the turnover movable block (3) are respectively provided with a fixed block pull spring fixing pin (8) and a movable block pull spring fixing pin (9), which are used for fixing the two ends of the pull spring (4).

3. The bending die with a turnover movable block according to claim 1, characterized in that: The front and back sides of the lower mold fixed block (2) are respectively provided with two pull springs (4).

4. The bending die with a turnover movable block according to claim 1, characterized in that: The outer side of the groove is provided with a movable block limiting table (7), which corresponds to the movable block limiting protrusion (10).

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