Traceless bending die

Abstract

The traceless bending die comprises an upper die and a lower die, the upper die is provided with a bending male die, the lower die is provided with a punched hole, the bending male die comprises a supporting block and a bending swing block, the supporting block and the upper die are fixedly installed, the bending swing block is rotatably installed at the bottom end of the supporting block, a workpiece is placed above the punched hole, and the punching hole is formed in the upper die. The bending swing block presses the workpiece to be bent in the punched hole and rotates in the supporting block in the left-right direction of the punched hole. Compared with the prior art, the traceless bending die is compact in layout and simple in structure, the bending swing block is movably installed, the rotating angle of the bending swing block in the supporting block can be changed along with changes of the shape and the position of a workpiece, friction between the workpiece and the bending swing block is reduced, and the bending precision is improved. Therefore, the problem of die marks appearing in the bending process of the workpiece is solved, and the machining quality of the workpiece is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet metal processing, in particular to a traceless bending die. Background Art

[0002] With the popularization of metal casings in various industries, consumers have higher and higher requirements for product appearance. For relatively thick materials such as aluminum and copper, the bending block in the bending die moves vertically toward the workpiece. The workpiece is subjected to force, and part of the workpiece moves vertically downward, causing severe friction between it and the bending block, resulting in scratches on the surface of the workpiece, that is, the bending die mark is relatively serious, and the bending angle is also unstable. The bending die mark cannot be processed by processes such as electroplating and polishing, resulting in unstable product processing quality. Utility Model Content

[0003] The purpose of the utility model is to provide a markless bending die to solve the technical problems in the background technology.

[0004] A markless bending die comprises an upper die and a lower die, wherein the upper die is provided with a bending punch, and the lower die is provided with a punching hole. The bending punch comprises a support block and a bending pendulum block, wherein the support block is fixedly mounted on the upper die, and the bending pendulum block is rotatably mounted on the bottom end of the support block, and the workpiece is placed above the punching hole. The bending pendulum block presses the workpiece to bend in the punching hole and rotates in the support block along the left and right directions of the punching hole.

[0005] A support hole is provided at the bottom of the support block, and the support hole passes through the front and rear ends of the support block. The support hole is a circular hole structure. A mounting opening is provided below the support hole, and the width of the mounting opening is smaller than the diameter of the support hole. The bending swing block includes a punch and a rotating shaft, and the rotating shaft is fixed above the punch and rotates in the support hole. The longitudinal cross-section of the rotating shaft matches the shape of the support hole. The end face of the bottom of the support block and on the left side of the support hole is a first inclined surface inclined upward in the direction away from the support hole, and the end face of the bottom of the support block and on the right side of the support hole is a second inclined surface inclined upward in the direction away from the support hole.

[0006] The lower die comprises a lower die base, a lower die pad and a lower die plate from bottom to top. The lower die plate is provided with a storage groove, in which a bending insert and a lower stopper are installed. The bending insert and the lower stopper are respectively located at the left and right ends of the storage groove, and the distance between the bending insert and the lower stopper forms a punching hole.

[0007] The bending insert is provided with a raised forming protrusion toward the lower stop block, the end surface of the forming protrusion facing the lower stop block is a forming support portion, the top of the forming support portion is an arc surface, and the end surface of the forming support portion toward the lower stop block is a third inclined surface inclined toward away from the lower stop block.

[0008] The top surface of the lower stop block is provided with a first chamfer, and the right side of the bottom end of the bending swing block is provided with a second chamfer that matches the position of the first chamfer.

[0009] Two guide blocks are provided on the top of the bending insert. The two guide blocks are symmetrically installed front and back, and the workpiece is placed between the two guide blocks.

[0010] The upper die comprises an upper die base, an upper die plate, an upper clamping plate and an upper stripping plate from top to bottom. The top end of the support block is fixedly mounted on the upper die plate, and the bending pendulum block passes through the upper stripping plate and contacts and extrude the workpiece.

[0011] Compared with the existing technology, the present application provides a markless bending mold with a compact layout and simple structure. The bending pendulum block is installed in a movable manner, which can change its rotation angle in the support block as the shape and position of the workpiece change, thereby reducing the friction between the workpiece and the bending pendulum block, thereby solving the mold mark problem that occurs during the bending process of the workpiece and effectively ensuring the processing quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : A schematic diagram of the structure of this application;

[0013] Figure 2 : Figure 1 A magnified view of point A;

[0014] Figure 3 : Position structure diagram between bending punch, bending insert and lower stopper;

[0015] Figure 4 : Main view of the bending insert;

[0016] Figure 5 : Main view of support block;

[0017] Figure 6 : The diagram of the bending punch in use for this application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] Specific embodiment 1: Please refer to Figures 1 to 6In the embodiment of the present invention, a markless bending mold includes an upper mold 1 and a lower mold 7. The upper mold 1 is equipped with a bending punch 6. The lower mold 7 is provided with a punching hole 13. The bending punch 6 includes a support block 601 and a bending swing block 602. The support block 601 is fixed to the upper mold 1. The bending swing block 602 is rotatably mounted at the bottom end of the support block 601. The workpiece 16 is placed above the punching hole 13. The bending swing block 602 presses the workpiece 16 to bend in the punching hole 13 and rotates in the support block 601 along the left and right directions of the punching hole 13. The upper mold 1 is moved from the upper mold 1 to the lower mold 1. Going downwards, there are the upper die base 2, the upper template 3, the upper clamping plate 4 and the upper stripping plate 5. The top of the support block 601 is fixedly installed with the upper template 3. The bending swing block 602 passes through the upper stripping plate 5 and contacts and extrudes the workpiece 16. The lower die 7 is composed of the lower die base 8, the lower die pad 9 and the lower template 10 from bottom to top. The lower template 10 is provided with a storage groove, and the storage groove is installed with a bending insert 11 and a bending insert 12. The bending insert 11 and the bending insert 12 are respectively at the left and right ends of the storage groove, and the distance between the bending insert 11 and the bending insert 12 forms a punching hole 13.

[0020] A support hole 601-1 is provided at the bottom of the support block 601, and the support hole 601-1 passes through the front and rear ends of the support block 601. The support hole 601-1 is a circular hole structure. A mounting opening 601-2 is provided below the support hole 601-1. The width of the mounting opening 601-2 is smaller than the diameter of the support hole 601-1. The bending pendulum block 602 includes a punch 602-1 and a rotating shaft 602-2. The rotating shaft 602-2 is fixed above the punch 602-1 and rotates in the support hole 601-1. The longitudinal cross-section of the rotating shaft 602-2 matches the shape of the support hole 601-1. The end face at the bottom of the support block 601 and on the left side of the support hole 601-1 is a first inclined surface 601-3 inclined upward in the direction away from the support hole 601-1. The end face at the bottom of the support block 601 and on the right side of the support hole 601-1 is a second inclined surface 601-4 inclined upward in the direction away from the support hole 601-1. The angles α(β) between the first inclined surface 601-3 and the second inclined surface 601-4 and the horizontal plane where the bottom end of the upper stripping plate 5 is located are both 3-5 degrees. In this embodiment, the angles α(β) between the first inclined surface 601-3 and the second inclined surface 601-4 and the horizontal plane where the bottom end of the upper stripping plate 5 is located are both 3 degrees.

[0021] The bending insert 11 is provided with a raised forming protrusion 1101 toward the bending insert 12. The end surface of the forming protrusion 1101 facing the bending insert 12 is a forming support portion. Above the forming support portion is an arc surface 1102. The end surface of the forming support portion facing the bending insert 12 is a third inclined surface 1103 inclined toward the direction away from the bending insert 12.

[0022] The top surface of the bending insert 12 is provided with a first chamfer 1201, and the right side of the bottom end of the bending pendulum block 602 is provided with a second chamfer 602-3 that matches the position of the first chamfer 1201. The coordination of the first chamfer 1201 and the second chamfer 602-3 is to facilitate the bending pendulum block 602 to be more easily inserted into the punching hole 13 to press and bend the workpiece 16.

[0023] Two guide blocks 14 are provided on the top of the bending insert 11. The two guide blocks 14 are installed symmetrically front and back, and the workpiece 16 is placed between the two guide blocks 14. Since the workpiece 16 processed in this application is also provided with a positioning hole, a positioning column 15 is also provided between the two guide blocks 14 and inserted into the positioning hole for limiting the bending of the workpiece 16.

[0024] Working principle: After the workpiece 16 to be bent is placed between the two guide blocks 14 for positioning, the part to be bent is suspended above the punching hole 13, and the support block 601 drives the bending pendulum block 602 to move downward to squeeze the workpiece 16. When the bending pendulum block 602 contacts the workpiece 16, it is also subjected to the reaction force of the workpiece 16, so that it swings around the axis of the rotating shaft 602-2 at a certain angle, reducing the friction between the side wall of the workpiece 16 and the bending pendulum block 602 during bending, thereby achieving the effect of markless bending.

[0025] Compared with the existing technology, the present application provides a markless bending mold with a compact layout and simple structure. The bending pendulum block is installed in a movable manner, which can change its rotation angle in the support block as the shape and position of the workpiece change, thereby reducing the friction between the workpiece and the bending pendulum block, thereby solving the mold mark problem that occurs during the bending process of the workpiece and effectively ensuring the processing quality of the workpiece.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A seamless bending die, characterized by: It includes an upper die and a lower die, the upper die is equipped with a bending punch, the lower die is provided with a punching hole, the bending punch includes a support block and a bending pendulum block, the support block is fixed to the upper die, the bending pendulum block is rotatably installed at the bottom end of the support block, the workpiece is placed above the punching hole, the bending pendulum block presses the workpiece to bend in the punching hole and it rotates in the support block along the left and right directions of the punching hole.

2. The seamless bending mold according to claim 1, characterized in that: A support hole is provided at the bottom of the support block, and the support hole passes through the front and rear ends of the support block. The support hole is a circular hole structure. A mounting opening is provided below the support hole, and the width of the mounting opening is smaller than the diameter of the support hole. The bending swing block includes a punch and a rotating shaft, and the rotating shaft is fixed above the punch and rotates in the support hole. The longitudinal cross-section of the rotating shaft matches the shape of the support hole. The end face of the bottom of the support block and on the left side of the support hole is a first inclined surface inclined upward in the direction away from the support hole, and the end face of the bottom of the support block and on the right side of the support hole is a second inclined surface inclined upward in the direction away from the support hole.

3. The seamless bending mold according to claim 2, characterized in that: The lower die comprises a lower die base, a lower die pad and a lower die plate from bottom to top. The lower die plate is provided with a storage groove, in which a bending insert and a lower stopper are installed. The bending insert and the lower stopper are respectively located at the left and right ends of the storage groove, and the distance between the bending insert and the lower stopper forms a punching hole.

4. The seamless bending mold according to claim 3, characterized in that: The bending insert is provided with a raised forming protrusion toward the lower stop block, the end surface of the forming protrusion facing the lower stop block is a forming support portion, the top of the forming support portion is an arc surface, and the end surface of the forming support portion toward the lower stop block is a third inclined surface inclined toward away from the lower stop block.

5. The seamless bending die according to claim 4, characterized in that: The top surface of the lower stop block is provided with a first chamfer, and the right side of the bottom end of the bending swing block is provided with a second chamfer that matches the position of the first chamfer.

6. The seamless bending die according to claim 5, characterized in that: Two guide blocks are provided on the top of the bending insert, and the two guide blocks are symmetrically installed front and back, and the workpiece is placed between the two guide blocks.

7. A seamless bending die according to any one of claims 1 to 6, characterized in that: The upper die comprises an upper die base, an upper die plate, an upper clamping plate and an upper stripping plate from top to bottom. The top end of the support block is fixedly mounted on the upper die plate, and the bending pendulum block passes through the upper stripping plate and contacts and extrude the workpiece.

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