CN216937990U - Efficient negative angle precision bending die - Google Patents

Abstract

An efficient negative angle precision bending die comprises an upper die, a lower die and a lower die base, wherein the upper die comprises an upper die base, an upper base plate, an upper male plate and an upper sliding block; the upper surface of the upper sliding block is propped against and provided with a first elastic component; a first negative angle inclined plane is arranged on the first side surface of the upper sliding block; the upper sliding block is connected with the upper male plate through a sliding rail structure; the lower die comprises a lower die base, a lower backing plate, a lower die plate and a lower floating plate, and the lower die plate is provided with a floating plate mounting groove; a lower floating plate is arranged in the floating plate mounting groove, and an elastic part is arranged between the lower floating plate and the lower die holder; the upper part of the first side surface of the lower floating plate is provided with a boss edge, and the lower part of the first side surface of the lower floating plate is provided with a swing block pressing groove; a lower swing block is arranged outside the first side surface of the lower floating plate, an arc-shaped corner is arranged at the corner below the first side surface of the lower swing block, and a pivot shaft is horizontally arranged in a penetrating manner and pivoted to the lower template; a second elastic component is propped against the lower part of the lower swinging block; the upper part of the lower swing block is provided with a second negative angle inclined plane, and the lower end of the lower swing block is provided with a swing block pressing plate in an outward protruding mode. The utility model can form the negative angle by one-time stamping, thereby saving the cost and improving the production efficiency.

Description

Efficient negative angle precision bending die

Technical Field

The utility model relates to the technical field of stamping dies, in particular to an efficient negative angle precise bending die.

Background

With the development of science and technology and the progress of society, the application of stamping dies is more and more extensive. The existing stamping products have the problems that the requirements on precise and high-precision negative angle bending dies are increased day by day, and the existing bending dies are high in cost, difficult to maintain, low in efficiency, complex in structure and the like. Aiming at a negative angle bending structure, the prior art generally adopts two steps of forming, the first step is bent to 90 degrees, the second step is bent again to form a negative angle on the basis of the first step, not only are the working procedures increased, the number of machines also increased, the processing efficiency is low, the forming size and the angle of a part are also difficult to accurately control, the manufacturing cost of a die is increased, and the production and the manufacturing of the negative angle part are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of providing an efficient negative angle precision bending die, which can form a negative angle through one-time stamping, save cost, improve production efficiency and improve the precision of a bent product.

The technical solution of the utility model is as follows:

an efficient negative angle precise bending die, which comprises an upper die and a lower die,

the upper die comprises an upper die base, an upper backing plate, an upper male plate and an upper sliding block which are sequentially arranged from top to bottom, the upper backing plate is fixed on the lower surface of the upper die base, the upper male plate is fixed on the lower surface of the upper backing plate, and the upper sliding block is arranged on the lower surface of the upper backing plate at one side of the upper male plate at an interval of a movable distance; the upper surface of the upper sliding block is propped against and provided with a first elastic component which is limited between the upper die holder and the upper backing plate and extends vertically; the length of the upper sliding block in the vertical direction is smaller than or equal to the length of the upper male plate in the vertical direction; a first negative angle inclined plane which inclines outwards is arranged on a first side surface of the upper sliding block, which is far away from the upper male plate; the upper sliding block is connected with the upper male plate through a sliding rail structure which inclines towards the inside of the upper male plate;

the lower die comprises a lower die base, a lower backing plate, a lower die plate and a lower floating plate which are sequentially arranged from bottom to top, the lower backing plate is fixed on the upper surface of the lower die base, the lower die plate is fixed on the upper surface of the lower backing plate, and floating plate mounting grooves are formed in the positions, corresponding to the upper male plate and the upper sliding block, of the lower die plate;

the lower floating plate is arranged in the floating plate mounting groove, and an elastic part is arranged between the lower floating plate and the lower die holder; the upper part of the first side surface of the lower floating plate is provided with a boss edge, and the lower end part of the lower floating plate is provided with a swing block pressing groove; the upper surface of the lower floating plate is used for placing a plate to be bent;

a lower swing block is arranged outside the first side surface of the lower floating plate in the floating plate mounting groove, an arc-shaped corner is arranged at the lower corner of the lower swing block, which is far away from the first side surface of the lower floating plate, and a pivot is horizontally arranged in the arc-shaped corner in a penetrating manner and is pivoted to the lower template; the lower swinging block is propped against a second elastic assembly which extends vertically below one end far away from the arc-shaped corner; a second negative angle inclined plane matched with the first negative angle inclined plane is arranged at the upper part of a second side surface, opposite to the first side surface, of the lower swing block, and a swing block pressing plate correspondingly matched with the swing block pressing groove is arranged at the lower end of the second side surface of the lower swing block in an outward protruding mode;

the bending part of the plate to be bent corresponds to the positions of the first negative angle inclined plane and the second negative angle inclined plane, the swing block pressing groove of the lower floating plate downwards extrudes the swing block pressing plate, the second negative angle inclined plane of the lower swing block rotates around the pivot shaft to the direction of the first negative angle inclined plane, and the bending part is extruded to the first negative angle inclined plane.

The efficient negative angle precision bending die is characterized in that a second upper sliding block and a second lower swinging block are symmetrically arranged on the other side faces of the upper male plate and the lower floating plate.

The efficient negative angle precision bending die comprises a first elastic assembly cavity, a first elastic piece and an upper ejector pin, wherein the first elastic assembly comprises a first elastic assembly cavity, a first elastic piece and an upper ejector pin; the upper die holder and the upper backing plate are provided with first elastic component cavities extending along the vertical direction, the first elastic components and the upper ejector pins are sequentially installed in the first elastic component cavities from top to bottom, the lower ends of the first elastic components abut against the tops of the upper ejector pins, and the bottoms of the lower ejector pins protrude out of the lower surface of the upper backing plate and are connected with the upper surface of the upper sliding block in a sliding manner;

the second elastic assembly comprises a second elastic assembly cavity, a second elastic piece and a lower thimble; the lower die base and the lower backing plate are provided with second elastic component cavities extending in the vertical direction, the second elastic components and the lower ejector pins are sequentially installed in the second elastic component cavities from bottom to top, the upper ends of the second elastic components abut against the bottoms of the upper ejector pins, and the tops of the lower ejector pins protrude out of the upper surface of the lower backing plate and abut against the lower surface of the lower swing block.

The efficient negative angle precision bending die is characterized in that the upper surface of the lower die plate is provided with an elastic positioning column for positioning the plate to be bent, and the inner side of the elastic positioning column is provided with an elastic part for abutting and limiting the edge of the plate to be bent.

The efficient negative angle precision bending die is characterized in that the lower die plate is provided with limit stops corresponding to the two ends of the pivot.

The efficient negative angle precise bending die is characterized in that the upper die holder is provided with guide posts extending vertically downwards, and the upper base plate, the lower die plate and the lower base plate are provided with guide holes corresponding to the guide posts.

From the above description, it is known that the present invention can actually achieve the following effects compared with the prior art:

according to the efficient negative angle precise bending die, the first negative angle inclined plane which inclines outwards is arranged on the first side surface of the upper sliding block, the second negative angle inclined plane is arranged on the second side surface of the lower swing block corresponding to the first negative angle inclined plane, when the swing block pressing plate of the lower swing block is pressed downwards by the swing block pressing groove of the lower floating plate, the second negative angle inclined plane of the lower swing block rotates towards the direction of the first negative angle inclined plane around the pivot, and the bending part of the plate to be bent is pressed onto the first negative angle inclined plane, so that the negative angle formed by punching and bending the plate at one time is realized, the problem of the original complex process that the plate needs to be bent to form the negative angle in two steps is solved, the cost is greatly saved, the production efficiency is improved, and the precision of a bent product is improved.

Drawings

FIG. 1 is a schematic view of a separated upper die and lower die of a preferred embodiment of the efficient negative angle precision bending die of the present invention;

FIG. 2 is a schematic diagram illustrating a closed state of an upper mold and a lower mold of a preferred embodiment of the efficient negative angle precision bending mold according to the present invention;

fig. 3 is a schematic top view of a negative angle precision bending mold according to a preferred embodiment of the utility model.

Main element number description:

the utility model comprises the following steps:

11: an upper die holder 12: the upper cushion plate 13: upper male board

14: the upper slider 141: first negative angle slope 2: first elastic component

21: first elastic member 22: an upper thimble 3: sliding rail structure

41: the lower die holder 42: lower pad 43: lower template

431: the elastic positioning column 432: the limit stopper 44: lower floating plate

441: boss side 442: and (5) swinging block pressing groove: elastic piece

6: lower swing block 61: arc-shaped corner 62: pivot shaft

63: second negative angle slope 64: the swinging block pressing plate 7: second elastic component

71: second elastic member 72: a lower thimble 8: guide post

9: plate 91 to be bent: bent part

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

The utility model provides an efficient negative angle precision bending die, which realizes that a plate is bent by one-time stamping to form a negative angle structure, saves cost, improves production efficiency and improves the precision of a bent product. In a preferred embodiment of the efficient negative angle precise bending die of the present invention, please refer to fig. 1 to 3, which are schematic structural views of the preferred embodiment of the efficient negative angle precise bending die of the present invention, the efficient negative angle precise bending die comprises an upper die and a lower die, the upper die comprises an upper die holder 11, an upper backing plate 12, an upper male plate 13 and an upper sliding block 14, which are sequentially arranged from top to bottom, the upper backing plate 12 is fixed on the lower surface of the upper die holder 11, the upper male plate 13 is fixed on the lower surface of the upper backing plate 12, and the upper sliding block 14 is arranged on the lower surface of the upper backing plate 12 at a movable distance from one side of the upper male plate 13; the upper surface of the upper slide block 14 is propped against a first elastic component 2 which is limited between the upper die holder 11 and the upper backing plate 12 and vertically extends; the length of the upper sliding block 14 in the vertical direction is less than or equal to the length of the upper male plate 13 in the vertical direction; a first negative angle inclined plane 141 which inclines outwards is arranged on a first side surface of the upper sliding block 14 away from the upper male plate 13; the upper sliding block 14 is connected with the upper male plate 13 through a sliding rail structure 3 which inclines towards the inside of the upper male plate 13; the lower die comprises a lower die base 41, a lower cushion plate 42, a lower die plate 43 and a lower floating plate 44 which are sequentially arranged from bottom to top, the lower cushion plate 42 is fixed on the upper surface of the lower die base 41, the lower die plate 43 is fixed on the upper surface of the lower cushion plate 42, and floating plate mounting grooves are formed in the positions, corresponding to the upper male plate 13 and the upper slide block 14, of the lower die plate 43; the lower floating plate 44 is installed in the floating plate installation groove, and an elastic part 5 is arranged between the lower floating plate 44 and the lower die holder 41; the upper part of the first side surface of the lower floating plate 44 is provided with a boss edge 441, and the lower end part of the first side surface is provided with a swing block pressing groove 442; the upper surface of the lower floating plate 44 is used for placing the plate 9 to be bent; a lower swing block 6 is arranged outside the first side surface of the lower floating plate 44 in the floating plate mounting groove, an arc-shaped corner 61 is arranged at the lower corner of the first side surface of the lower swing block 6 away from the lower floating plate 44, and a pivot 62 is horizontally arranged in the arc-shaped corner 61 in a penetrating manner and pivoted to the lower template 43; the lower swinging block 6 is propped against a second elastic component 7 which extends vertically below one end far away from the arc-shaped corner 61; a second negative angle inclined plane 63 matched with the first negative angle inclined plane 141 is arranged at the upper part of a second side surface, opposite to the first side surface, of the lower swing block 6, and a swing block pressing plate 64 correspondingly matched with the swing block pressing groove 442 is arranged at the lower end of the second side surface of the lower swing block 6 in an outwards protruding mode; the bending part 91 of the plate 9 to be bent is arranged at a position corresponding to the first negative angle inclined plane 141 and the second negative angle inclined plane 63, the swing block pressing groove 442 of the lower floating plate 44 downwards extrudes the swing block pressing plate 64, and the second negative angle inclined plane 63 of the lower swing block 6 rotates around the pivot 62 towards the first negative angle inclined plane 141 and extrudes the bending part 91 to the first negative angle inclined plane 141. As shown in fig. 1 to 3, the efficient negative angle precision bending die of the utility model includes an upper die including an upper die base 11, an upper backing plate 12 and an upper male plate 13 sequentially arranged from top to bottom, wherein an upper slider 14 is arranged on a lower surface of the upper backing plate 12 at a distance from one side of the upper male plate 13, a first elastic component 2 which is limited between the upper die base 11 and the upper backing plate 12 and vertically extends is arranged on an upper surface of the upper slider 14 in an abutting manner, and an upper surface of the upper slider 14 is slidably connected with a lower end of the first elastic component 2, so that the upper slider 14 can perform a sliding motion close to or far away from the upper male plate 13; the upper slide block 14 is connected with the upper male plate 13 through the slide rail structure 3 inclined towards the interior of the upper male plate 13, when the upper die moves downwards, and the upper slide block 14 presses the lower floating plate 44, the first elastic component 2 is compressed, and the upper slide block 14 can slide outwards along the slide rail structure 3, so that the first negative angle inclined plane 141 of the upper slide block 14 can be aligned with the bending position of the plate 9 to be bent; the lower die comprises a lower die base 41, a lower backing plate 42 and a lower die plate 43 which are sequentially arranged from bottom to top, a lower floating plate 44 is arranged in a floating plate mounting groove formed in the lower floating plate 44, a boss edge 441 is arranged at the upper part of the first side surface of the lower floating plate 44, and a swing block pressing groove 442 is arranged at the lower part of the first side surface of the lower floating plate 44; the first side of lower kickboard 44 is provided with down pendulum piece 6 outward, the lower corner that the first side of lower kickboard 44 was kept away from to lower pendulum piece 6 sets up to arc corner 61, and wear to be equipped with pivot 62 pivot joint to lower bolster 43 in arc corner 61 horizontally, lower pendulum piece 6 has second elastic component 7 in the lower extreme of keeping away from arc corner 61 supports the top, the second side upper portion of lower pendulum piece 6 is equipped with the second negative angle inclined plane 63 with first negative angle inclined plane 141 complex, its lower extreme outwards protruding be equipped with pendulum piece indent 442 corresponding complex pendulum piece clamp plate 64. After the plate 9 to be bent is placed on the lower floating plate 44, the lower die moves downwards, the upper sliding block 14 contacts the plate firstly and continues to press downwards, when the upper sliding block 14 slides outwards to the position where the first negative angle inclined plane 63 aligns with the bending position of the plate 9 to be bent, the upper male plate 13 contacts the plate, the upper male plate 13 and the upper sliding block 14 simultaneously punch downwards and press the lower floating plate 44 to move downwards together, when the swing block pressing groove 442 of the lower floating plate 44 presses the swing block pressing plate 64 of the lower swing block 6, the second negative angle inclined plane 63 of the lower swing block 6 rotates around the pivot 62 towards the direction of the first negative angle inclined plane 141 and presses the bending part 91 onto the first negative angle inclined plane 141, and the negative angle bending process of the plate is completed; when the material is taken off, the upper die moves upwards to separate from the lower die, and the upper sliding block 14 also moves inwards along the sliding rail structure 3 to separate from the negative angle bending part 91 of the bent plate along with the upward moving process of the upper die, so that the bent plate is prevented from being adhered to the upper sliding block 14, and the material is taken off under the influence. The utility model realizes the one-time stamping and bending of the plate to form the negative angle, solves the problem of the original complex process of bending the plate to form the negative angle by two steps, greatly saves the cost, improves the production efficiency and improves the precision of a bent product.

In the above-mentioned efficient negative angle precision bending mold of the present invention, in the preferred embodiment, the other side surfaces of the upper male plate 13 and the lower floating plate 44 are symmetrically provided with a second upper sliding block and a second lower swinging block. As shown in fig. 1 to fig. 3, the second lower swing blocks of the second upper slider are symmetrically arranged on the other side surfaces of the upper male plate 13 and the lower floating plate 44, and the stamping and bending of the bending portion 91 at the other end of the plate are realized, so that the bending efficiency is improved.

In the preferred embodiment of the efficient negative angle precise bending die of the present invention, the first elastic element 2 includes a first elastic element cavity, a first elastic member 21 and an upper thimble 22; the upper die holder 11 and the upper backing plate 12 are provided with the first elastic assembly cavity extending in the vertical direction, the first elastic piece 21 and the upper thimble 22 are sequentially installed in the first elastic assembly cavity from top to bottom, the lower end of the first elastic piece 21 abuts against the top of the upper thimble 22, and the bottom of the upper thimble 22 protrudes out of the lower surface of the upper backing plate 12 and is slidably connected with the upper surface of the upper slide block 14; the second elastic assembly 7 comprises a second elastic assembly cavity, a second elastic piece 71 and a lower thimble 72; the lower die holder 41 and the lower backing plate 42 are provided with second elastic component cavities extending in the vertical direction, the second elastic components 71 and the lower ejector pins 72 are sequentially installed in the second elastic component cavities from bottom to top, the upper ends of the second elastic components 71 abut against the bottoms of the lower ejector pins 72, and the tops of the lower ejector pins 72 protrude out of the upper surface of the lower backing plate 42 and abut against the lower surface of the lower swing block 6. As shown in fig. 1, the first elastic component 2 of the present invention includes an upper die holder 11 and a first elastic component cavity formed in the upper pad 12 along the vertical direction, the inner diameter of the upper end of the first elastic component cavity is greater than the inner diameter of the lower end of the first elastic component cavity, the upper end of the first elastic component cavity is provided with a first elastic element 21, the lower end of the first elastic component cavity is provided with an upper thimble 22, the upper end of the upper thimble 22 abuts against the lower end of the first elastic element 21 in the upper end of the first elastic component cavity, the lower end of the upper thimble 22 extends out of the lower surface of the upper pad 12, and the diameter of the upper end of the upper thimble 22 is greater than the inner diameter of the lower end of the first elastic component cavity. The second elastic assembly 7 of the present invention includes a second elastic assembly cavity formed in the lower die base 41 and the lower pad 42 along the vertical direction, the inner diameter of the lower end of the second elastic assembly cavity is larger than the inner diameter of the upper end thereof, the lower end thereof is mounted with a second elastic member 71, the upper end thereof is mounted with a lower thimble 72, the lower end of the lower thimble 72 abuts against the upper end of the second elastic member 71 in the lower end of the second elastic assembly cavity, the upper end of the lower thimble 72 extends out of the upper surface of the lower pad 42, and the diameter of the lower end of the upper thimble 22 is larger than the inner diameter of the upper end of the second elastic assembly cavity.

In the above-mentioned high-efficiency negative-angle precise bending die of the present invention, in a preferred embodiment of the utility model, the upper surface of the lower die plate 43 is provided with an elastic positioning column 431 for positioning the plate 9 to be bent, and an inner side of the elastic positioning column 431 is provided with an elastic portion for abutting and limiting an edge of the plate 9 to be bent. As shown in fig. 3, in the present invention, the elastic positioning column 431 is disposed at the periphery of the bending portion 91 of the plate 9 to be bent, and the elastic portion abutting against the bending portion 91 is disposed inside the elastic positioning column 431, so that the plate 9 to be bent can be positioned and limited.

In the above-mentioned efficient negative angle precision bending mold of the present invention, in the preferred embodiment, the lower mold plate 43 is provided with limit stops 432 at two ends corresponding to the pivot 62. As shown in FIG. 3, the present invention can limit the position of the pivot shaft 62 by providing limit stoppers 432 at both ends of the pivot shaft 62, thereby preventing the pivot shaft from being displaced during the rotation.

In the above-mentioned efficient negative-angle precise bending mold of the present invention, in the preferred embodiment, the upper mold base 11 is provided with the guide posts 8 extending vertically and downwardly, and the upper pad 12, the lower template 43 and the lower pad 42 are provided with the guide holes corresponding to the guide posts 8. As shown in fig. 1, the guide post 8 extending vertically and downwardly is arranged on the upper die holder 11, so that the position of the upper die is not deviated in the process of pressing down the upper die, the stability is improved, and the precision of a bent product is ensured.

As shown in fig. 1 to fig. 3, the working process and principle of the efficient negative angle precision bending die of the present invention are explained by taking the above preferred embodiment as an example, which is specifically as follows:

the efficient negative angle precise bending die comprises an upper die, an upper backing plate 12 and an upper male plate 13, wherein the upper die is sequentially provided with an upper die holder 11, the upper backing plate 12 and the upper male plate 13 from top to bottom, an upper sliding block 14 is arranged on the lower surface of the upper backing plate 12 at one side of the upper male plate 13 at an interval of a moving distance, a first elastic component 2 which is limited between the upper die holder 11 and the upper backing plate 12 and extends vertically is arranged on the upper surface of the upper sliding block 14 in an abutting mode, and the upper surface of the upper sliding block 14 is connected with the lower end of the first elastic component 2 in a sliding mode, so that the upper sliding block 14 can perform sliding motion close to or far away from the upper male plate 13; the upper slide block 14 is connected with the upper male plate 13 through the slide rail structure 3 which is inclined towards the interior of the upper male plate 13, when the upper die moves downwards, and the upper slide block 14 presses the lower floating plate 44, the first elastic component 2 is compressed, and the upper slide block 14 can slide outwards along the slide rail structure 3, so that the first negative-angle inclined plane 141 of the upper slide block 14 can be aligned with the bending position of the plate 9 to be bent; the lower die comprises a lower die base 41, a lower backing plate 42 and a lower die plate 43 which are sequentially arranged from bottom to top, a lower floating plate 44 is arranged in a floating plate mounting groove formed in the lower floating plate 44, a boss edge 441 is arranged at the upper part of the first side surface of the lower floating plate 44, and a swing block pressing groove 442 is arranged at the lower part of the first side surface of the lower floating plate 44; the first side of lower kickboard 44 is provided with down pendulum piece 6 outward, the lower corner that the first side of lower kickboard 44 was kept away from to lower pendulum piece 6 sets up to arc corner 61, and wear to be equipped with pivot 62 pivot joint to lower bolster 43 in arc corner 61 horizontally, lower pendulum piece 6 has second elastic component 7 in the lower extreme of keeping away from arc corner 61 supports the top, the second side upper portion of lower pendulum piece 6 is equipped with the second negative angle inclined plane 63 with first negative angle inclined plane 141 complex, its lower extreme outwards protruding be equipped with pendulum piece indent 442 corresponding complex pendulum piece clamp plate 64. After the plate 9 to be bent is placed on the lower floating plate 44, the lower die moves downwards, the upper sliding block 14 contacts the plate firstly and continues to press downwards, when the upper sliding block 14 slides outwards until the first negative angle inclined plane 63 aligns to the bending position of the plate 9 to be bent, the upper male plate 13 contacts the plate, the upper male plate 13 and the upper sliding block 14 simultaneously punch downwards and press the lower floating plate 44 to move downwards together, when the swing block pressing groove 442 of the lower floating plate 44 presses the swing block pressing plate 64 of the lower swing block 6, the second negative angle inclined plane 63 of the lower swing block 6 rotates around the pivot 62 towards the first negative angle inclined plane 141, and presses the bending part 91 onto the first negative angle inclined plane 141, so that the negative angle bending process of the plate is completed; when the material is taken off, the upper die moves upwards to separate from the lower die, and the upper sliding block 14 also moves inwards along the sliding rail structure 3 to separate from the negative angle bending part 91 of the bent plate along with the upward moving process of the upper die, so that the bent plate is prevented from being adhered to the upper sliding block 14, and the material is taken off under the influence. The utility model realizes the one-time stamping and bending of the plate to form the negative angle, solves the problem of the original complex process of bending the plate to form the negative angle by two steps, greatly saves the cost, improves the production efficiency and improves the precision of a bent product. In a further embodiment, the second lower swing blocks of the second upper slide block are symmetrically arranged on the other side surfaces of the upper male plate 13 and the lower floating plate 44, and meanwhile, the bending part 91 at the other end of the plate is stamped and bent, so that the bending efficiency is improved.

According to the efficient negative angle precision bending die, the first negative angle inclined plane 141 which inclines outwards is arranged on the first side surface of the upper sliding block 14, the second negative angle inclined plane 63 is arranged on the second side surface of the lower swing block 6 corresponding to the first negative angle inclined plane 141, when the swing block pressing plate 64 of the lower swing block 6 is pressed downwards by the swing block pressing groove 442 of the lower floating plate 44, the second negative angle inclined plane 63 of the lower swing block 6 rotates towards the first negative angle inclined plane 141 around the pivot 62, and the bending part 91 of the plate 9 to be bent is pressed onto the first negative angle inclined plane 141, so that the negative angle formed by punching and bending the plate at one time is realized, the problem of the original complex process of forming the negative angle by bending the plate at two steps is solved, the cost is greatly saved, the production efficiency is improved, and the precision of a bent product is improved.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.

Claims (6)

1. An efficient negative angle precise bending die is characterized by comprising an upper die and a lower die,

the upper die comprises an upper die base, an upper backing plate, an upper male plate and an upper sliding block which are sequentially arranged from top to bottom, the upper backing plate is fixed on the lower surface of the upper die base, the upper male plate is fixed on the lower surface of the upper backing plate, and the upper sliding block is arranged on one side of the upper male plate on the lower surface of the upper backing plate at a certain interval; the upper surface of the upper sliding block is propped against and provided with a first elastic assembly which is limited between the upper die holder and the upper backing plate and extends vertically; the length of the upper sliding block in the vertical direction is smaller than or equal to the length of the upper male plate in the vertical direction; a first negative angle inclined plane which inclines outwards is arranged on the first side face, far away from the upper male plate, of the upper sliding block; the upper sliding block is connected with the upper male plate through a sliding rail structure which inclines towards the inside of the upper male plate;

the lower die comprises a lower die base, a lower backing plate, a lower die plate and a lower floating plate which are sequentially arranged from bottom to top, the lower backing plate is fixed on the upper surface of the lower die base, the lower die plate is fixed on the upper surface of the lower backing plate, and floating plate mounting grooves are formed in the positions, corresponding to the upper male plate and the upper sliding block, of the lower die plate;

the lower floating plate is arranged in the floating plate mounting groove, and an elastic part is arranged between the lower floating plate and the lower die holder; the upper part of the first side surface of the lower floating plate is provided with a boss edge, and the lower end part of the lower floating plate is provided with a swing block pressing groove; the upper surface of the lower floating plate is used for placing a plate to be bent;

a lower swing block is arranged outside the first side face of the lower floating plate in the floating plate mounting groove, an arc-shaped corner is arranged at the corner of the lower part of the lower swing block, which is far away from the first side face of the lower floating plate, and a pivot is horizontally arranged in the arc-shaped corner in a penetrating manner and is pivoted to the lower template; the lower swinging block is propped against a second elastic assembly which extends vertically below one end far away from the arc-shaped corner; a second negative angle inclined plane matched with the first negative angle inclined plane is arranged at the upper part of a second side surface, opposite to the first side surface, of the lower swing block, and a swing block pressing plate correspondingly matched with the swing block pressing groove is arranged at the lower end of the second side surface of the lower swing block in an outward protruding mode;

the bending part of the plate to be bent corresponds to the positions of the first negative angle inclined plane and the second negative angle inclined plane, the swing block pressing groove of the lower floating plate downwards extrudes the swing block pressing plate, the second negative angle inclined plane of the lower swing block rotates around the pivot shaft to the direction of the first negative angle inclined plane, and the bending part is extruded to the first negative angle inclined plane.

2. The efficient negative angle precision bending die according to claim 1, wherein a second upper sliding block and a second lower swinging block are symmetrically arranged on the other side surface of the upper male plate and the lower floating plate.

3. The efficient negative angle precision bending die of claim 2, wherein the first elastic assembly comprises a first elastic assembly cavity, a first elastic member and an upper ejector pin; the upper die holder and the upper backing plate are provided with first elastic component cavities extending along the vertical direction, the first elastic components and upper thimbles are sequentially installed in the first elastic component cavities from top to bottom, the lower ends of the first elastic components abut against the tops of the upper thimbles, and the bottoms of the upper thimbles protrude out of the lower surface of the upper backing plate and are connected with the upper surface of the upper sliding block in a sliding manner;

the second elastic assembly comprises a second elastic assembly cavity, a second elastic piece and a lower thimble; the lower die base and the lower backing plate are provided with second elastic component cavities extending in the vertical direction, the second elastic components and the lower ejector pins are sequentially installed in the second elastic component cavities from bottom to top, the upper ends of the second elastic components abut against the bottoms of the lower ejector pins, and the tops of the lower ejector pins protrude out of the upper surface of the lower backing plate and abut against the lower surface of the lower swing block.

4. The efficient negative angle precision bending die of claim 3, wherein an elastic positioning column for positioning the plate to be bent is arranged on the upper surface of the lower die plate, and an elastic part for abutting and limiting the edge of the plate to be bent is arranged on the inner side of the elastic positioning column.

5. The efficient negative angle precision bending die of claim 4, wherein limit stops are arranged on the lower die plate corresponding to two ends of the pivot.

6. The efficient negative angle precision bending die of claim 5, wherein the upper die holder is provided with guide posts extending vertically downwards, and the upper backing plate, the lower die plate and the lower backing plate are provided with guide holes corresponding to the guide posts.

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