CN211839854U - A kind of inner hook and curling part forming die - Google Patents

Abstract

The utility model relates to a forming die for inner hook and curling parts, which comprises an upper die and a lower die. The upper die comprises an upper die seat, an upper die fixing plate, an upper die pressing material plate, a pressing material core driving punch and a first nitrogen gas The lower mold includes a lower mold base, a lower mold fixing plate and a plurality of lower molding material cores. When the mold is closed, the pressing material core driving punch moves downward under the driving of the first nitrogen gas spring. Before the upper molding material plate is pressed, the pressing material core driving punch is advanced in advance with the lower mold. The lower molding material core is contacted, so that the lower molding material core moves to the closed state in advance, so that in the process of pressing the material, first ensure that the inner hook curling edge is pressed by the lower molding material core, so as to effectively ensure the wall of the part. Deformation and dimensional stability of hook hemming in parts.

Description

A kind of inner hook and curling part forming die

technical field

The utility model relates to a mould, in particular to a mould for forming an inner hook curling part.

Background technique

Some electromechanical parts drive rotors or mechanical drive rotors with precision casings, and the bottom end of the casing is in the shape of an inner hook and crimp. At present, in the existing production technology, in the actual production process of such parts in large quantities, the left and right parts are usually symmetrical and a set of progressive dies is used to complete the production of the parts. From the consideration of the production cost and efficiency of the parts, there are two situations in the shape of the parts in the bottom shrinking process after the mold is stretched: (1) The mold structure is formed without pressing the core inside the part, and this mold structure is used in actual production. The deformation of the barrel wall of the part and the stability of the size of the hook and crimp inside the part cannot be guaranteed. (2) There is a pressure core forming mold structure inside the part. This mold structure can ensure the deformation of the barrel wall of the part and the stability of the size of the hook and crimp inside the part. This mold structure must ensure the internal pressure core during the actual forming process of the mold. The mold parts should complete the pressing of the parts before the mold forming starts. When the mold is opened, the internal pressing core mold parts should return to the initial state to complete the return, but the existing molds are difficult to meet the requirements.

Utility model content

The purpose of this utility model is to solve the above problems and provide an inner hook and crimping part forming mold, which has the stability of production, can realize automatic material return, and return the inner pressing material core to the initial state, which is convenient for production.

The purpose of the present utility model is achieved through the following technical solutions:

An inner hook and crimping part forming mold includes an upper mold and a lower mold, the upper mold includes an upper mold base, an upper mold fixing plate, an upper mold pressing material plate, a pressing material core driving punch and a first nitrogen gas spring, the The upper die fixing plate is arranged at the lower part of the upper die seat, the upper die pressing plate is arranged at the lower part of the upper die fixing plate, and the pressing material core driving punch is arranged in the upper die so as to move up and down. , the upper end of the pressing material core driving punch is connected to the first nitrogen gas spring, and the lower end of the pressing material core driving punch can extend out of the upper molding material plate;

The lower mold includes a lower mold base, a lower mold fixing plate and a plurality of lower molding material cores, the lower mold fixing plate is arranged on the upper part of the lower mold base, the lower mold fixing plate is provided with a mold cavity, and the lower mold fixing plate is provided with a mold cavity. The lower molding material core is movably arranged in the cavity, a second nitrogen gas spring is correspondingly arranged outside the lower molding material core, and gathers inward under the action of the second nitrogen gas spring, and the lower molding material core is in the middle formation of mesopores;

Under the action of the first nitrogen gas spring, the end of the pressing material driving punch extends into the middle hole, and the lower molding material core moves outward to compress the inner hook and crimping parts.

When the mold is closed, the pressing material core driving punch moves downward under the driving of the first nitrogen gas spring. Before the upper molding material plate is pressed, the pressing material core driving punch is advanced in advance with the lower mold. The lower molding material core is in contact with the lower molding material core, so that the lower molding material core moves to the closed state in advance, so that during the molding process of the part, first ensure that the inner hook and curling edge is pressed by the lower molding material core, so as to effectively ensure the wall of the part. Deformation and dimensional stability of hook and crimping in parts.

Further, the lower molding material core is provided with four pieces, which are in the shape of 1/4 disc, and the second gas springs are arranged on the outer side of the lower molding material core in a one-to-one correspondence.

Further, a guide limit block is also provided in the mold cavity in a one-to-one correspondence with the lower molding material core.

Further, the lower end of the pressure core driving punch is tapered, and the upper part of the pressure core driving punch is arranged in a thick and thin cone, so that the further down the pressure core driving punch is, the greater the force is, and the parts are pressed. the tighter.

Further, the shape of the mold cavity matches the shape of the inner hook curling part, and is substantially circular.

Further, the upper part of the upper die base is provided with an upper die pad, and the first nitrogen gas spring is arranged inside the upper die base and the upper die pad.

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

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

Further, the upper mold pressing plate is also provided with a pressing plate insert.

The specific working principle of this mold is that the pressure source of nitrogen gas spring is added to the tail of the pressing material core to drive the punch to provide pressing force to the lower molding material core. The pressing material core driving punch can move up and down to change the lower molding material core and the upper molding material. The time difference of the pressing material of the plate balances the time difference between the working stroke of the lower molding material core and the upper molding material plate, that is, the movement stroke of the driving punch is greater than that of the die pressing plate (and the driving punch is active, during the movement of the mold) The upper and lower molds can be moved up and down), so that when the upper and lower molds are closed, the lower mold pressing material core moves to the closed state in advance, so that the parts can ensure that the inner hook and curling edges have a pressing material core in advance during the mold forming process; and the mold is in the mold opening. At the same time, the pressing material core can move to the initial state in advance, which is convenient for the part to be ejected from the mold, achieves the structure setting of the first-in first-out forming of the inner hook part, and realizes the pressing material first-in first-out principle in the forming process of the part.

This mold makes the part in the process of pressing the material to first ensure that its inner hook and curling edge is pressed by the lower molding material core, so as to effectively ensure the deformation of the part barrel wall and the dimensional stability of the part's inner hook curling edge, suitable for inner hook curling The production of parts, and the mold structure is simple, easy to assemble, easy to maintain and match the mold, and the production efficiency is high.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model mould;

2 is a partial cross-sectional view of the mold of the present utility model along the length direction;

Figures 3 and 4 are cross-sectional views of the mold of the present utility model along the width direction;

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

Detailed ways

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

Example

Referring to Figures 1-5, an inner hook and crimping part forming mold includes an upper mold 100 and a lower mold 200. As shown in Figure 2, the upper mold includes an upper mold base 101, an upper mold fixing plate 102, an upper mold pressing material plate 103, a press The core driving punch 104 and the first nitrogen gas spring 105, the upper die fixing plate 102 is arranged on 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, and the pressing core driving punch 104 can The upper end of the pressing core driving punch 104 is connected to the first nitrogen gas spring 105 , and the lower end of the pressing core driving punch 104 can extend out of the upper moulding plate 103 .

4 and 5, the lower mold includes a lower mold base 201, a lower mold fixing plate 202 and a plurality of lower molding material cores 203. The lower mold fixing plate 202 is provided on the upper part of the lower mold base 201, and the lower mold fixing plate 202 is provided with a mold. cavity, the lower molding material core 203 is movably provided in the mold cavity, the lower molding material core 203 is correspondingly provided with a second nitrogen gas spring 204, and is gathered inward under the action of the second nitrogen gas spring 204, and the lower molding material core 203 is formed in the middle Medium hole. Under the action of the first nitrogen gas spring 105 , the end of the pressing core driving punch 104 extends into the middle hole, and the lower molding core 203 moves outward to press the inner hook crimping part 300 tightly.

Specifically, the lower molding material core 203 is provided with four pieces, which are in a 1/4 disc shape, and the second nitrogen gas springs 204 are arranged on the outer side of the lower molding material core 203 in a one-to-one correspondence. In the mold cavity, there is also a guide limit block 205 corresponding to the lower molding material core 203 one-to-one, which has a guiding function and makes the movement of the lower molding material core more accurate. The lower end of the pressure core driving punch 104 is tapered, and the upper part of the pressure core driving punch 104 is arranged in a thick and thin cone, so that the further down the pressure core driving punch 104 is, the greater the force is, and the more the part is pressed. tight. The shape of the cavity matches the shape of the inner hook and crimping part, and is roughly circular. The upper die base 101 is provided with an upper die pad 106 , and a first gas spring 105 is arranged inside the upper die holder 101 and the upper die pad. In addition, 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 pressing plate insert is also provided on the upper die pressing plate 103 .

The specific working principle is that when the upper die and the lower die are clamped, the pressing core drives the punch 104 to move downward under the driving of the first nitrogen gas spring 105. Before the upper die presses the material plate 103, the pressing core drives the punch. 104 is in contact with the lower molding material core 203 in the lower mold in advance, so that the lower molding material core 203 is moved to the closed state in advance, so that in the process of molding the part, first ensure that its inner hook curling edge is pressed by the lower molding material core 203 Therefore, it can effectively ensure the deformation of the barrel wall of the part and the dimensional stability of the hook and crimp inside the part.

Because the pressure source of nitrogen gas spring is added at the tail of the pressing material core driving punch 104 to provide pressing force to the lower moulding material core 203; the lower moulding material core 203 drives the punch 104 to move up and down to change the lower moulding material core 203 and the upper moulding material The time difference of the pressing material of the plate 103 balances the time difference of the working stroke of the lower molding material core 203 and the upper molding material plate 103, that is, the movement stroke of the driving punch is greater than the movement stroke of the die pressing plate and the driving punch is active. During the process, it can move up and down to achieve that when the upper and lower molds are closed, the lower mold pressing material core 203 moves to the closed state in advance, so that the part can ensure that the inner hook and curling edge has a pressing material core pressing material in advance during the mold forming process; When the mold is opened, the pressing material core can move to the initial state in advance, which is convenient for the part to be released from the mold and achieves the structure setting of the first-in first-out forming of the inner hook part.

The above description of the embodiments is for the convenience of those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (9)

1. An inner hook crimping part forming die, comprising an upper die (100) and a lower die (200), wherein the upper die comprises an upper die seat (101), an upper die fixing plate (102), an upper die A molding material plate (103), a pressing material core driving punch (104) and a first nitrogen gas spring (105), the upper mold fixing plate (102) is arranged at the lower part of the upper mold seat (101), the upper mold A molding material plate (103) is arranged at the lower part of the upper mold fixing plate (102), and the molding material core driving punch (104) can be moved up and down in the upper mold, and the molding material core drives the punching punch (104). The upper end of the head (104) is connected to the first nitrogen gas spring (105), and the lower end of the pressing material core driving punch (104) can extend out of the upper molding material plate (103); The lower mold comprises a lower mold seat (201), a lower mold fixing plate (202) and a plurality of lower mold pressing material cores (203), and the lower mold fixing plate (202) is arranged on the lower mold seat (201). In the upper part, the lower mold fixing plate (202) is provided with a mold cavity, the lower molding material core (203) is movably arranged in the mold cavity, and a second nitrogen gas spring is correspondingly arranged outside the lower molding material core (203). (204), and gathers inward under the action of the second gas spring (204), and the lower molding material core (203) forms a middle hole in the middle; Under the action of the first nitrogen gas spring (105), the end of the pressing material core driving punch (104) extends into the middle hole, and the lower molding material core (203) moves outward to move the inner The hook crimping part (300) is pressed tightly. 2. The inner hook and crimping part forming mold according to claim 1, characterized in that, the lower molding material core (203) is provided with four pieces, which are in the shape of 1/4 disc, and the second nitrogen The springs (204) are arranged on the outer side of the lower molding material core (203) in a one-to-one correspondence. 3. The inner hook and crimping part forming mold according to claim 2, characterized in that, there is also a guide limit block ( 205). 4 . The inner hook curling part forming die according to claim 1 , wherein the lower end of the blanking core driving punch ( 104 ) is tapered. 5 . 5 . The inner hook and beaded part forming mold according to claim 1 , wherein the shape of the cavity matches the shape of the inner hook and beaded part. 6 . 6. An inner hook curling part forming mold according to claim 1, characterized in that, an upper mold foot (106) is provided on the upper part of the upper mold base (101), and the first gas spring (105) It is arranged inside the upper die base (101) and the upper die pad. 7 . The inner hook curling part forming die according to claim 1 , wherein an upper die pad is arranged between the upper die seat ( 101 ) and the upper die fixing plate ( 102 ). 8 . 8. The inner hook curling part forming die according to claim 1, wherein a lower die pad (202) is provided between the lower die fixing plate (202) and the lower die seat (201). 206). 9 . The inner hook curling part forming mold according to claim 1 , characterized in that, the upper mold pressing plate ( 103 ) is further provided with a pressing plate insert. 10 .

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