CN211839854U

CN211839854U - Forming die for inward-hooking curled edge part

Info

Publication number: CN211839854U
Application number: CN202020229057.XU
Authority: CN
Inventors: 郑明喜; 郝俏; 尤佳佳
Original assignee: Aolin Auto Parts Changshu Co ltd
Current assignee: Aolin Auto Parts Changshu Co ltd
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2020-11-03
Anticipated expiration: 2030-02-28

Abstract

The utility model relates to an inner hook crimping part forming die, which comprises an upper die and a lower die, wherein the upper die comprises an upper die base, an upper die fixing plate, an upper die pressing plate, a pressing core driving punch and a first nitrogen spring; the lower die comprises a lower die base, a lower die fixing plate and a plurality of lower die pressing material cores. When the die is closed, the material pressing core drives the punch to move downwards under the driving of the first nitrogen spring, before the upper die pressing plate presses materials, the material pressing core drives the punch to contact with a lower die pressing core in the lower die in advance, so that the lower die pressing core moves to a closed state in advance, the inward hooking curled edge of the part is firstly guaranteed to be pressed by the lower die pressing core in the material pressing and forming process of the part, and the deformation of the wall of the part cylinder and the dimensional stability of the inward hooking curled edge of the part are effectively guaranteed.

Description

Forming die for inward-hooking curled edge part

Technical Field

The utility model relates to a mould, concretely relates to collude turn-up part forming die in.

Background

Some electromechanical parts drive the rotor or machinery drives the accurate housing of rotor, and the housing bottom is the inside hook turn-up shape. In the prior art, the production of parts like the parts is generally finished by adopting a set of progressive dies with symmetrical left and right parts in a large-batch actual production process. From the aspects of production cost, efficiency and the like of parts, the shape of the part has two conditions in the bottom retraction process after the die drawing is finished: (1) the die structure for forming the material core without pressure in the part cannot ensure the deformation of the wall of the part cylinder and the stability of the size of the hook curling edge in the part in actual production. (2) The die structure can ensure that the inner material pressing core die part can finish pressing the part before the die forming starts in the actual forming process of the die, and when the die is opened, the inner material pressing core die part returns to the initial state to finish material returning at the beginning, but the existing die is difficult to meet the requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an collude turn-up part forming die in order to solve above-mentioned problem, possess the stability of production, can realize automatic material returned and make inside pressure material core get back to initial condition, convenient production.

The purpose of the utility model is realized through the following technical scheme:

the upper die comprises an upper die base, an upper die fixing plate, an upper die pressing plate, a pressing core driving punch and a first nitrogen spring, wherein the upper die fixing plate is arranged at the lower part of the upper die base;

the lower die comprises a lower die seat, a lower die fixing plate and a plurality of lower die pressing material cores, the lower die fixing plate is arranged at the upper part of the lower die seat and is provided with a die cavity, the lower die pressing material cores are movably arranged in the die cavity, second nitrogen springs are correspondingly arranged outside the lower die pressing material cores and are inwardly gathered under the action of the second nitrogen springs, and the lower die pressing material cores form a middle hole in the middle;

the material pressing core drives the punch to extend into the middle hole under the action of the first nitrogen spring, and the material pressing core of the lower die moves outwards to press the inward-hooking curled edge part tightly.

When the die is closed, the material pressing core drives the punch to move downwards under the driving of the first nitrogen spring, before the upper die pressing plate presses materials, the material pressing core drives the punch to contact with a lower die pressing core in the lower die in advance, so that the lower die pressing core moves to a closed state in advance, the inward hooking curled edge of the part is firstly guaranteed to be pressed by the lower die pressing core in the material pressing and forming process of the part, and the deformation of the wall of the part cylinder and the dimensional stability of the inward hooking curled edge of the part are effectively guaranteed.

Furthermore, the lower die pressing material core is provided with four round discs of 1/4 shape, and the second nitrogen springs are arranged on the outer side of the lower die pressing material core in a one-to-one correspondence mode.

Furthermore, a guide limiting block is further arranged in the die cavity in one-to-one correspondence with the lower die pressing cores.

Furthermore, the lower end of the pressing core driving punch is conical, and the pressing core driving punch is arranged in a conical manner with the upper part being thick and the lower part being thin, so that the pressing core driving punch is more downward, the acting force is larger, and the part is pressed more tightly.

Furthermore, the shape of the die cavity is matched with the shape of the inward hooking and curling part and is approximately circular.

Furthermore, an upper die pad is arranged on the upper portion of the upper die base, and the first nitrogen spring is arranged inside the upper die base and the upper die pad.

Further, an upper die base plate is arranged between the upper die base and the upper die fixing plate.

Further, a lower die base plate is arranged between the lower die fixing plate and the lower die base.

Further, a material pressing plate insert is further arranged on the upper die material pressing plate.

The specific working principle of the die is that a nitrogen spring pressure source is added at the tail of a material pressing core driving punch to provide pressing force for a lower die material pressing core, the material pressing core driving punch can move up and down to change the pressing time difference between the lower die material pressing core and an upper die material pressing plate and balance the time difference of the working strokes of the lower die material pressing core and the upper die material pressing plate, namely, the moving stroke of the driving punch is greater than the moving stroke of the die material pressing plate (and the driving punch is movable and can move up and down in the moving process of the die), so that when the upper die and the lower die are closed, the lower die material pressing core moves to a closed state in advance, and therefore, the inward-hooking curled edge is ensured to press the material of the material pressing core in advance in the forming process; when the die is opened, the material pressing core can move to an initial state in advance, so that the part can be conveniently discharged from the die, the structural arrangement of first-in first-out in the forming process of the inner hook part is achieved, and the material pressing first-in first-out principle in the forming process of the part is realized.

The die ensures that the inner hook crimping of the part is pressed by the lower die pressing core in the process of pressing and forming the part, thereby effectively ensuring the deformation of the wall of the part cylinder and the dimensional stability of the inner hook crimping of the part, being suitable for the production of the inner hook crimping part, and having simple structure, easy assembly, easy die maintenance and high production efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the mold of the present invention;

FIG. 2 is a partial sectional view of the mold of the present invention along the length direction;

fig. 3 and 4 are cross-sectional views of the mold of the present invention along the width direction;

fig. 5 is a cross-sectional top view of the lower mold of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

Referring to fig. 1-5, an inside hooking curled part forming die comprises an upper die 100 and a lower die 200, as shown in fig. 2, the upper die comprises an upper die base 101, an upper die fixing plate 102, an upper die pressing plate 103, a pressing core driving punch 104 and a first nitrogen spring 105, the upper die fixing plate 102 is arranged at the lower part of the upper die base 101, the upper die pressing plate 103 is arranged at the lower part of the upper die fixing plate 102, the pressing core driving punch 104 can be movably arranged in the upper die up and down, the upper end of the pressing core driving punch 104 is connected with the first nitrogen spring 105, and the lower end of the pressing core driving punch 104 can extend out of the upper die pressing plate 103.

As shown in fig. 4 and 5, the lower mold comprises a lower mold base 201, a lower mold fixing plate 202 and a plurality of lower mold pressing cores 203, the lower mold fixing plate 202 is arranged on the upper portion of the lower mold base 201, the lower mold fixing plate 202 is provided with a mold cavity, the lower mold pressing cores 203 are movably arranged in the mold cavity, a second gas spring 204 is correspondingly arranged outside the lower mold pressing cores 203 and inwardly gathered under the action of the second gas spring 204, and a middle hole is formed in the middle of the lower mold pressing cores 203. The material pressing core driving punch 104 is under the action of the first nitrogen spring 105, the end part of the punch extends into the middle hole, and the lower die material pressing core 203 moves outwards to press the inner hook crimping part 300 tightly.

Specifically, four lower mold material pressing cores 203 are arranged, each lower mold material pressing core is in the shape of 1/4 discs, and the second nitrogen springs 204 are arranged on the outer sides of the lower mold material pressing cores 203 in a one-to-one correspondence mode. The mould cavity is also provided with a guide limiting block 205 corresponding to the lower mould material pressing core 203 one by one, which has a guiding function and enables the lower mould material pressing core to move more accurately. The lower end of the material pressing core driving punch 104 is conical, and the material pressing core driving punch 104 is arranged in a conical manner with a thick upper part and a thin lower part, so that the material pressing core driving punch 104 is more downward, the acting force is larger, and the part is pressed more tightly. The shape of the die cavity is matched with the shape of the inward hooking curled edge part and is approximately circular. An upper die pad 106 is arranged at the upper part of the upper die holder 101, and a first nitrogen spring 105 is arranged inside the upper die holder 101 and the upper die pad. An upper die pad is provided between the upper die base 101 and the upper die fixing plate 102. A lower die backing plate 206 is arranged between the lower die fixing plate 202 and the lower die base 201, and a pressure plate insert is further arranged on the upper die pressure plate 103.

The specific working principle is that when the upper die and the lower die are closed, the material pressing core driving punch 104 moves downwards under the driving of the first nitrogen spring 105, before the material pressing of the upper die pressing material plate 103 is carried out, the material pressing core driving punch 104 contacts with the lower die pressing material core 203 in the lower die in advance, so that the lower die pressing material core 203 moves to a closed state in advance, the inward hooking curled edge of a part is firstly guaranteed to be pressed by the lower die pressing material core 203 in the material pressing forming process, and the deformation of the wall of the part cylinder and the dimensional stability of the inward hooking curled edge of the part are effectively guaranteed.

As the tail of the material pressing core driving punch 104 is added with a nitrogen spring pressure source, the material pressing core 203 of the lower die is provided with a material pressing force; the lower die pressing core 203 drives the punch 104 to move up and down to change the pressing time difference between the lower die pressing core 203 and the upper die pressing plate 103 and balance the time difference of the working strokes of the lower die pressing core 203 and the upper die pressing plate 103, namely, the moving stroke of the drive punch is larger than that of the die pressing plate and the drive punch is movable and can move up and down in the moving process of the die to achieve the aim that the lower die pressing core 203 moves to a closed state in advance when the upper die and the lower die are closed, so that the inward-hooking curled edge of a part is ensured to press the pressing core in advance in the forming process of the die; when the die is opened, the pressing core can move to an initial state in advance, so that the part can be conveniently demoulded, and the first-in first-out structural arrangement for forming the internally-hooked part is achieved.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The forming die for the inward-hooking curled part comprises an upper die (100) and a lower die (200), and is characterized in that the upper die comprises an upper die base (101), an upper die fixing plate (102), an upper die pressing plate (103), a pressing core driving punch (104) and a first nitrogen spring (105), the upper die fixing plate (102) is arranged at the lower part of the upper die base (101), the upper die pressing plate (103) is arranged at the lower part of the upper die fixing plate (102), the pressing core driving punch (104) can be movably arranged in the upper die up and down, the upper end of the pressing core driving punch (104) is connected with the first nitrogen spring (105), and the lower end of the pressing core driving punch (104) can extend out of the upper die pressing plate (103);

the lower die comprises a lower die seat (201), a lower die fixing plate (202) and a plurality of lower die pressing material cores (203), the lower die fixing plate (202) is arranged at the upper part of the lower die seat (201), the lower die fixing plate (202) is provided with a die cavity, the lower die pressing material cores (203) are movably arranged in the die cavity, second nitrogen springs (204) are correspondingly arranged outside the lower die pressing material cores (203) and are gathered inwards under the action of the second nitrogen springs (204), and middle holes are formed in the middle of the lower die pressing material cores (203);

and under the action of the first nitrogen spring (105), the end part of the pressing core driving punch (104) extends into the middle hole, and the lower pressing core (203) moves outwards to press the inward hooking and curling part (300).

2. The forming die for inward hooking curled part of claim 1, wherein the lower molding core (203) is provided with four pieces of 1/4 circular discs, and the second gas springs (204) are provided at the outer side of the lower molding core (203) in a one-to-one correspondence.

3. The forming die for the inward-hooking curled edge part according to claim 2, wherein a guiding stopper (205) is further provided in the die cavity in one-to-one correspondence with the lower die core (203).

4. The forming die for internally hooked curled parts of claim 1, wherein the lower end of the plunger driving punch (104) is tapered.

5. The tooling of claim 1 wherein the cavity is shaped to match the profile of the female crimped part.

6. The forming die for the inward hooking curled part according to claim 1, wherein an upper die pad (106) is provided on the upper portion of the upper die holder (101), and the first nitrogen spring (105) is provided inside the upper die holder (101) and the upper die pad.

7. The forming die for the inward-hooking curled part according to claim 1, wherein an upper die backing plate is arranged between the upper die holder (101) and the upper die fixing plate (102).

8. The forming die for the inward-hooking curled edge part according to claim 1, wherein a lower die backing plate (206) is arranged between the lower die fixing plate (202) and the lower die base (201).

9. The forming die for inward-hooking curled part according to claim 1, wherein the upper die pressing plate (103) is further provided with a pressing plate insert.