Punch die suitable for cold forging and reverse extruding of joint yoke

A joint fork and cold forging technology, applied in the direction of manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machinery, etc., can solve the problems of wasting manpower and material resources, affecting efficiency, affecting product quality, etc. small effect

Inactive Publication Date: 2017-09-22
JIANGSU SUNWAY PRECISION FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Affect product quality, waste manpower and material resources, affect efficiency

Method used

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  • Punch die suitable for cold forging and reverse extruding of joint yoke

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Embodiment Construction

[0017] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] Such as figure 1 As shown, the present invention discloses a punch die suitable for cold forging and reverse extrusion of the fork, including a working ligament, which adds an auxiliary ligament behind the working ligament, and the length L of the auxiliary ligament from the bottom end is less than the effective segment length of the reverse extrusion fork. The secondary extrusion is performed on the upper mouth of the fork through the auxiliary ligament, which enlarges the size. Under the action of the auxiliary ligament, the punch die suitable for cold forging and reverse extrusion of the fork disclosed by the present invention performs secondary extrusion on the fork to enlarge the size, thereby effectively solving the problem of undersized size caused by stress release. The length L of the auxiliary lig...

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Abstract

The invention discloses a punch die suitable for cold forging and reverse extruding of a joint yoke. The punch die comprises a working ligament, and is characterized in that an auxiliary ligament is additionally arranged behind the working ligament, the length L of the auxiliary ligament from the bottom end is smaller than the effective length of a reverse extrusion fork part, and secondary extrusion is carried out on an upper opening of the joint yoke through the auxiliary ligament. According to the punch die suitable for cold forging and reverse extruding of the joint yoke, under the action of the auxiliary ligament, the fork part is subjected to secondary extrusion, the size is enlarged, and therefore the problem of size reduction caused by stress release is effectively solved.

Description

technical field [0001] The invention relates to the field of punch die design in the technical field of metal pressure processing, in particular to a punch die suitable for fork cold forging and back extrusion. Background technique [0002] In the prior art, a single working ligament is generally designed for the back-extrusion punch of the fork. When the ear of the fork is reverse-extruded, the fork of the fork far away from the main working ligament will shrink in size due to stress release. way to obtain the qualified size. Affect product quality, waste manpower and material resources, and affect efficiency. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, solve the problems in the prior art, and provide a punch die suitable for cold forging and reverse extrusion of joint forks. Through simple die design, it can effectively solve the problems caused by stress release. The size of the fork fork is...

Claims

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Application Information

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IPC IPC(8): B21J13/02
CPCB21J13/02
Inventor 袁海兵李明明姚杨华杨益王维张卫
Owner JIANGSU SUNWAY PRECISION FORGING
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