CN110523844B

CN110523844B - Progressive die stamping method for tubular thin-wall part

Info

Publication number: CN110523844B
Application number: CN201910835891.5A
Authority: CN
Inventors: 庄严; 王希亮; 江程志; 李志华
Original assignee: Chengdu Homin Technology Co Ltd
Current assignee: Chengdu Homin Technology Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-09-01
Anticipated expiration: 2039-09-05
Also published as: CN110523844A

Abstract

The invention discloses a progressive die stamping method of a tubular thin-wall part, S1, selecting a tube (1) with a height of 3-4 mm, a wall thickness of 2-3 mm and flat upper and lower end surfaces, and arranging the tube (1) on a frame at intervals along a linear direction to form a strip material; s2, the pipe at the upper head end of the strip is assembled on the top surface of the groove (3) of the female die (2), and the through hole (4) of the pipe (1) is ensured to be communicated with the groove (3); s3, pressing the pipe (1) to the top by a punch A (5) with the diameter larger than that of the through hole (4), forming a first upper step (6) in the pipe (1) after pressing to a certain depth, and forming a first lower step (7) on the outer wall of the pipe (1). The invention has the beneficial effects that: the machining efficiency is improved, batch production can be realized, the machining precision is improved, and the process is simple.

Description

Progressive die stamping method for tubular thin-wall part

Technical Field

The invention relates to the technical field of tubular thin-wall part machining, in particular to a progressive die stamping method for a tubular thin-wall part.

Background

At present, electronic products are continuously upgraded, the sizes of electronic parts are smaller, tubular thin-wall parts are put into use in large quantity, the tubular thin-wall parts are in a mesoporous tubular shape, the wall thickness of the tubular thin-wall parts is 0.35mm, and the flatness requirement of end faces is less than 0.05 mm. The tubular thin-walled part is mainly processed by cutting, namely a pipe with the wall thickness of 0.35mm is selected and directly cut by a machining method, although a product can be processed, a large amount of burrs are generated at the cutting part, so that the processing quality of the product is reduced, the requirement of the end face planeness of 0.05mm cannot be met, a subsequent grinding process is required for meeting the requirement, the production process is undoubtedly increased, and the production efficiency is reduced. Therefore, a method for stamping a product, which improves the processing efficiency and the processing precision, can realize mass production and has a simple process, is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the progressive die stamping method for the tubular thin-wall parts, which has the advantages of improving the processing efficiency and the processing precision, realizing batch production and being simple in process.

The purpose of the invention is realized by the following technical scheme: a progressive die stamping method for tubular thin-wall parts comprises the following steps:

s1, selecting a pipe with a height of 3-4 mm, a wall thickness of 2-3 mm and flat upper and lower end faces; arranging the pipes on the frame at intervals along the linear direction to form a belt material;

s2, placing the pipe on the top surface of the groove of the female die, and ensuring that the through hole of the pipe is communicated with the groove;

s3, pressing the punch A with the diameter larger than that of the through hole to the top of the pipe, forming a first upper step in the pipe after pressing to a certain depth, and forming a first lower step on the outer wall of the pipe;

s4, moving the belt material, supporting a first lower step of the semi-finished pipe on the top surface of the groove, pressing the first lower step onto the top surface of the first upper step by using a punch B with the diameter smaller than that of the first upper step, forming a second upper step on the semi-finished pipe after pressing to a certain depth, and simultaneously forming a second lower step on the outer wall of the semi-finished pipe;

s5, along with the continuous movement of the strip, when the horizontal distance between the last-stage lower step and the last-stage upper step is equal to the wall thickness of the required tubular thin-wall part by 0.35mm, stopping pressurizing;

and S6, inserting the punch C with the diameter equal to that of the last-stage upper step into the last-stage upper step from top to bottom, so that the obtained tubular thin-wall part falls off, and finally obtaining the product.

The invention has the following advantages: the invention improves the processing efficiency and the processing precision and has simple process.

Drawings

FIG. 1 is a schematic view of a first stamping operation of a tube;

FIG. 2 is a schematic structural view of the tube after the first punching;

FIG. 3 is a schematic view of a second operation of stamping a tube;

FIG. 4 is a schematic structural view of the tube after the second punching;

FIG. 5 is a schematic structural view of a stamped product;

in the figure, 1-pipe, 2-female die A, 3-groove A, 4-through hole, 5-punch A, 6-first upper step, 7-first lower step, 8-second upper step, 9-second lower step and 10-punch B.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:

as shown in fig. 1 to 5, a progressive die stamping method for a tubular thin-walled part comprises the following steps:

s1, selecting a pipe 1 with a height of 3-4 mm, a wall thickness of 2-3 mm and flat upper and lower end faces;

s2, placing the pipe on the top surface of the groove A3 of the female die A2, and ensuring that the through hole 4 of the pipe 1 is communicated with the groove A3;

s3, pressing the pipe 1 to the top by a punch A5 with the diameter larger than that of the through hole 4, forming a first upper step 6 in the pipe 1 after pressing to a certain depth, and forming a first lower step 7 on the outer wall of the pipe 1;

s4, moving the strip, supporting the bottom surface of a first lower step 7 of the semi-finished pipe on the top surface of a groove B3 of a female die B, pressing the bottom surface of the first lower step onto the top surface of a first upper step 6 by using a punch B10 with the diameter smaller than that of the first upper step 6, forming a second upper step 8 on the semi-finished pipe after pressing to a certain depth, and simultaneously forming a second lower step 9 on the outer wall of the semi-finished pipe;

and S6, inserting the punch C with the diameter equal to that of the last-stage upper step into the last-stage upper step from top to bottom, so that the obtained tubular thin-wall part falls off, and finally obtaining the product. Therefore, the method adopts a stamping form to obtain the thin-wall tubular part, the upper end surface and the lower end surface of the obtained part are flat, the processing precision of the end surfaces is ensured, in addition, the original cutting mode is replaced, the upper end surface and the lower end surface are not required to be ground again, the labor intensity of workers is greatly reduced, and the production efficiency is further improved. In addition, a plurality of products are arranged on the belt material, and the belt material can be processed into a plurality of products in a row at one time, so that the mass production of the products is realized.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A progressive die stamping method for tubular thin-wall parts is characterized by comprising the following steps: it comprises the following steps:

s1, selecting a pipe (1) with a height of 3-4 mm, a wall thickness of 2-3 mm and flat upper and lower end faces; arranging the pipes (1) on a frame at intervals along a linear direction to form a strip;

s2, arranging the pipe at the upper head end of the strip on the top surface of the groove A (3) of the female die A (2), and ensuring that the through hole (4) of the pipe (1) is communicated with the groove A (3);

s3, pressing the punch A (5) with the diameter larger than that of the through hole (4) to the top of the pipe (1), forming a first upper step (6) in the pipe (1) after pressing to a certain depth, and forming a first lower step (7) on the outer wall of the pipe (1);

s4, moving the strip, supporting the bottom surface of a first lower step (7) of the semi-finished pipe on the top surface of a groove B of a female die B, pressing the top surface of the first upper step (6) by using a punch B (10) smaller than the diameter of the first upper step (6), forming a second upper step (8) on the semi-finished pipe after pressing to a certain depth, and forming a second lower step (9) on the outer wall of the semi-finished pipe;