Die structure for bending swing block

Abstract

The utility model discloses a die structure for bending a swing block, which relates to the field of metal plate bending and comprises an upper die and a lower die, the upper die comprises an upper backing plate, an upper fixing plate, a fixing block and a female die insert, the upper fixing plate and the fixing block are fixed below the upper backing plate, and the female die insert is connected with the upper fixing plate through a rotating shaft. The lower die comprises a material pressing block below the fixing block, bending punches on the two sides of the material pressing block, a lower base plate and a lower die plate, and a square through hole is formed in the middle of the upper fixing plate; the rotating shaft is arranged on the side, close to the fixing block, of the female die insert in a penetrating mode. A gap is formed between the female die insert and the upper base plate; the material pressing block is fixed on the lower die plate through a discharging bolt and a reset spring which are arranged below the material pressing block, and the bending punch is fixed on the lower base plate through a bolt. When the die is opened, the concave die insert is in an inward natural inclined state; when the die is closed, the female die insert is ejected by a workpiece raw material to be perpendicular to the upper end face of the pressing block. According to the swing block bending structure, stripping is achieved through rotation of the female die insert, the structure is simple, machining is convenient, and the stripping effect is good.

Description

Technical Field

[0001] The utility model relates to the field of sheet metal bending, in particular to a die structure for bending a swing block. Background Art

[0002] Bending dies generally have the problem of stripping. Currently, the stripping structures mainly include various slider structures and spring pin structures. The spring pin structure is simple but has limited application scope, and the spring pin is prone to failure after repeated stamping; while the slider structure is relatively complicated to process.

[0003] For example, the patent with publication number CN 213378818 U discloses a stamping, bending and stripping mechanism, including a base, on which a lower limiting column is fixedly arranged in a relative position, a buffer rod is slidably embedded in the top of each lower limiting column, an upper limiting column is fixedly arranged on the top of the buffer rod, a stamping plate is fixedly arranged on the top of the upper limiting column, and the top center of the stamping plate is fixedly arranged on an external stamping lifting device, and a stamping punch is fixedly arranged at the top center of the stamping plate, a sliding block is slidably embedded on the side where the lower limiting columns are close to each other, and a stamping die is fixedly arranged on the side where the sliding blocks are close to each other, a stamping groove is opened at the top center of the stamping die, and a plurality of mounting grooves are opened at the inner side of the top of the stamping groove, and a stripping plate is rotatably arranged on the inner side of each mounting groove through a rotating shaft, and a stripping plug is slidably embedded at the top corners of the stamping die. The top axis of the base is fixed with a stripping cylinder by bolts on both sides, and the top of the stripping cylinder is fixed with a support plate by a connecting rod, and the side of the support plate away from each other is slidably arranged on both sides of the lower limiting column. The stripping mechanism is to push the sheet metal part away from the stamping groove through the cooperation of the sliding block and the stripping cylinder to achieve stripping, and the connection structure of the sliding block is relatively complicated to process. Utility Model Content

[0004] The utility model aims to provide a bending die structure of a pendulum block-shaped concave die, so as to solve the problems of complex processing of the stripping structure and poor stripping effect in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted is: a mold structure for bending a swing block, which is divided into an upper mold and a lower mold, the upper mold comprising an upper pad, an upper fixed plate fixed under the upper pad, a fixed block in the middle of the upper fixed plate, and die inserts on both sides of the fixed block, the lower mold comprising a pressing block directly below the fixed block, bending punches installed on both sides of the pressing block, a lower pad, and a lower template, a square through hole for accommodating the die insert and the fixed block is opened in the middle of the upper fixed plate; the die insert is connected to the upper fixed plate by a rotating shaft, and the rotating shaft is penetrated on the side of the die insert close to the fixed block; the lower part of the fixed block is wide at the top and narrow at the bottom; the pressing block is connected to the lower template through the unloading bolts and the reset spring at the bottom, and the bending punch is fixed to the lower pad with bolts. When the mold is opened, the die insert naturally tilts inward and sticks to the lower part of the fixed block; when the mold is closed, the die insert is pushed by the workpiece raw material into a shape perpendicular to the upper surface of the pressing block, and a gap is generated between the die insert and the lower part of the fixed block.

[0006] Specifically, the die insert is naturally inclined inwardly by 2 to 3 degrees.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] The swing block bending structure realizes material removal by rotating the concave die insert, has a simple structure, is easy to process and has a good material removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 A longitudinal sectional view of the embodiment of the utility model in the mold closing state;

[0010] Attached Figure 2 It is a longitudinal sectional view of the embodiment of the utility model when the stamping is completed and returned to the original position;

[0011] Attached Figure 3 This is a product structure diagram of an embodiment of the utility model;

[0012] In the figure: 1-die insert, 2-fixed block, 3-upper template, 4-upper pad, 5-upper fixed plate, 6-lower fixed plate, 7-bending punch, 8-lower pad, 9-pressing block, 10-lower template, 11-product, 12-unloading bolt. DETAILED DESCRIPTION

[0013] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments.

[0014] Example: See Figure 1 and Figure 2, a mold structure for bending a swing block, divided into an upper mold and a lower mold, the upper mold includes an upper pad 4, a fixed block 2 and an upper fixed plate 5 fixed below the upper pad 4, and a die insert 1 on both sides of the fixed block 2, the lower mold includes a pressure block 9 directly below the fixed block 2, bending punches 7 installed on both sides of the pressure block 9, a lower pad 8, and a lower mold plate 10, and a square through hole for accommodating the die insert 1 and the fixed block 2 is opened in the middle of the upper fixed plate 5; the die insert 1 is connected to the upper fixed plate 5 by a rotating shaft, and the rotating shaft is penetrated on one side of the die insert 1 close to the fixed block 2; the die insert 1 and the upper part of the fixed block 2 are in a contact form with a smooth transition, and the lower part of the fixed block 2 is wide at the top and narrow at the bottom; the pressure block 9 is connected to the lower mold plate 10 through the unloading bolt 12 and the reset spring at the bottom, and the bending punch 7 is fixed to the lower pad 8 with bolts. When the mold is opened, the die insert 1 naturally tilts inward by 2.5°, and the die insert 1 sticks to the lower part of the fixed block 2; when the mold is closed, the die insert 1 is pushed by the workpiece raw material into a shape perpendicular to the upper surface of the pressing block 9, and a gap is generated between the die insert 1 and the lower part of the fixed block 2.

[0015] Working process: In the initial state, the die insert 1 is slightly tilted inward; as the punch press die is pressed down to contact the workpiece raw material, the die insert 1 is pushed into a shape perpendicular to the upper surface of the pressure block 9; then the punch press continues to press down to the bottom dead center, and under the joint action of the bending punch 7 and the pressure block 9, the workpiece raw material is bent into a product 11; then the punch press die moves upward, the pressure block 9 is reset, and the die insert 1 is separated from the product. Under the action of its own gravity, the die insert 1 rotates inward around the rotating axis, and its inner side sticks to the fixed block 2 to complete the material removal.

[0016] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary, but not restrictive, and the scope of the present invention is defined by the appended claims rather than the above explanations and descriptions, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. At the same time, any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A die structure for bending a swing block, comprising an upper die and a lower die, wherein the upper die comprises an upper pad (4), an upper fixed plate (5) and a fixed block (2) fixed below the upper pad, and a female die insert (1) on both sides of the fixed block; the lower die comprises a pressing block (9) directly below the fixed block (2), a bending punch (7) installed on both sides of the pressing block, a lower pad (8), and a lower die plate (10); a square through hole for accommodating the female die insert (1) and the fixed block (2) is opened in the middle of the upper fixed plate (5), characterized in that: The die insert (1) is connected to the upper fixed plate (5) via a rotating shaft, and the rotating shaft is arranged on the side of the die insert (1) close to the fixed block (2); the lower part of the fixed block (2) is wide at the top and narrow at the bottom; the pressing block (9) is connected to the lower mold plate (10) via the unloading bolts (12) and the return spring at the bottom, and the bending punch (7) is fixed to the lower pad (8) by bolts; when the mold is opened, the die insert (1) naturally tilts inward; when the mold is closed, the die insert (1) is pushed by the workpiece raw material into a shape perpendicular to the upper surface of the pressing block (9).

2. A mold structure for bending a swing block according to claim 1, characterized in that: The die insert (1) is naturally inclined inwards by 2 to 3 degrees.

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