CN112296115A

CN112296115A - Deep conical part rotary extrusion method

Info

Publication number: CN112296115A
Application number: CN202011045720.1A
Authority: CN
Inventors: 谷成渝
Original assignee: Chongqing Changan Industry Group Co Ltd
Current assignee: Chongqing Changan Industry Group Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-02-02

Abstract

A deep conical part rotary extrusion method is characterized in that a set of spiral guide device is additionally arranged on an original extrusion die and comprises a guide sleeve (3), a spring (2), a top plate (1), a fixing plate (4) and a lining (5), a workpiece is placed into a female die (8) during extrusion, a male die (7) is pressed down by a pressure head (6) fixed on a press sliding block, rotary extrusion is carried out, after the deep conical workpiece (9) is extruded and formed, the pressure head (6) moves upwards together with the press sliding block, meanwhile, the male die (7) returns to the position before extrusion under the action of the top plate (1) and the spring (2), the deep conical workpiece (9) is ejected upwards by an ejector rod (11) and a bottom punch (10) of the ejection device, the deep conical workpiece (9) is taken out, and one-time extrusion processing is completed. The invention effectively solves the problem that the cone angle part of the male die is broken off due to concentrated extrusion force in the extrusion process of the deep conical piece.

Description

Deep conical part rotary extrusion method

Technical Field

The invention belongs to the technical field of pressure processing, and particularly relates to a rotary extrusion method of a deep conical piece with a conical inner hole.

Background

The deep conical part is mainly characterized in that the conical hole is deep, the angle of the conical hole is small, particularly when the depth of the conical hole is more than 3 times larger than the diameter of the conical hole, and the angle of the conical hole is less than 20 degrees, the conical angle part of the male die is directly impacted by the male die in the extrusion process and is easily broken, and due to the fact, the deep conical part cannot be processed by extrusion forming, usually a bar machine is used for processing, but the production efficiency is low, the material utilization rate is low, and the utilization rate is less than 15%.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a method for rotationally extruding a deep tapered member.

The rotary extrusion method of the deep conical part is characterized in that a set of spiral guide device is added on an original extrusion die, the spiral guide device has the functions of guiding and demoulding after extrusion, the spiral guide device comprises a guide sleeve 3, a spring 2, a top plate 1, a fixed plate 4 and a lining 5, a raised spiral guide track is arranged in a hole of the guide sleeve 3 and is matched with a guide groove on a male die 7, and the guide groove on the surface of the male die 7 is acted with the spiral guide track in the hole of the guide sleeve 3 fixed on the fixed plate 4 during extrusion to carry out rotary extrusion; during extrusion, a workpiece is placed into the female die 8 firstly, the male die 7 is pressed down by the pressure head 6 fixed on the press sliding block, in the process, the guide groove on the surface of the male die 7 and the spiral guide rail of the inner hole of the guide sleeve 3 act to carry out rotary extrusion, after the workpiece 9 is extruded and formed, the pressure head 6 and the press sliding block move upwards together, meanwhile, the male die 7 returns to the position before extrusion under the action of the top plate 1 and the spring 2, the workpiece 9 is ejected upwards by the ejector rod 11 and the bottom punch 10 of the ejector device, the workpiece 9 is taken out, and one-time extrusion processing is completed.

The rotary extrusion method of the deep conical part is beneficial to demoulding of the male die from a workpiece, and does not need a part unloading device.

Drawings

FIG. 1 deep taper

FIG. 2 Male die 7

FIG. 3 drawing of an extrusion die

In the above figures: the device comprises a top plate 1, a spring 2, a guide sleeve 3, a fixing plate 4, a bushing 5, a pressing head 6, a male die 7, a female die 8, a deep conical workpiece 9, a bottom punch 10 and an ejector rod 11.

Detailed Description

The invention is further described below with reference to the following figures and examples.

Examples

The deep cone rotary extrusion method of the embodiment is that a set of spiral guide device is added on the original extrusion die, the spiral guide device has the functions of guiding and demoulding after extrusion, and the structure of the spiral guide device is shown in figures 2 and 3; the spiral guide device comprises a guide sleeve 3, a spring 2, a top plate 1, a fixed plate 4 and a bush 5, wherein a raised spiral guide track is arranged in a hole of the guide sleeve 3 and is matched with a guide groove on the male die 7, and the guide groove on the surface of the male die 7 is acted with the spiral guide track of the inner hole of the guide sleeve 3 fixed on the fixed plate 4 during extrusion to carry out rotary extrusion; when in extrusion, a workpiece is firstly placed into the female die 8, the male die 7 is pressed down by the pressing head 6 fixed on the press slide, in the process, the guide groove on the surface of the male die 7 is acted with the spiral guide track of the inner hole of the guide sleeve 3 to carry out rotary extrusion, after the deep conical workpiece 9 is extruded and formed, the pressing head 6 moves upwards together with the press slide, meanwhile, the male die 7 returns to the position before extrusion under the action of the top plate 1 and the spring 2, the deep conical workpiece 9 is upwards ejected by the workpiece 9 through the ejector rod 11 and the bottom punch 10 of the ejector device, the deep conical workpiece 9 is taken out, and one-time extrusion processing is completed.

Claims

1. A deep cone rotary extrusion method is characterized in that: a set of spiral guide device is added on the original extrusion die, the spiral guide device has the functions of guiding and demoulding after extrusion, the spiral guide device comprises a guide sleeve (3), a spring (2), a top plate (1), a fixed plate (4) and a bush (5), a raised spiral guide track is arranged in a hole of the guide sleeve (3) and is matched with a guide groove on a male die (7), and the guide groove on the surface of the male die (7) is acted with the spiral guide track of the inner hole of the guide sleeve (3) fixed on the fixed plate (4) during extrusion to carry out rotary extrusion; when in extrusion, a workpiece is firstly placed into a female die (8), a pressure head (6) fixed on a press machine sliding block presses down a male die (7), in the process, a guide groove on the surface of the male die (7) and a spiral guide rail of an inner hole of a guide sleeve (3) act to carry out rotary extrusion, after a deep conical workpiece (9) is extruded and formed, the pressure head (6) and the press machine sliding block move upwards together, meanwhile, the male die (7) returns to the position before extrusion under the action of a top plate (1) and a spring (2), the deep conical workpiece (9) is ejected upwards through an ejector rod (11) and a bottom punch (10) of an ejector device, the deep conical workpiece (9) is taken out, and one-time extrusion processing is completed.