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Closed-extrusion and molding method of flange

A technology of occlusion extrusion and extrusion forming, which is applied in the field of metal pressure processing, can solve the problems of low utilization rate of parts material, many subsequent processing procedures, and high manufacturing cost, and achieves low manufacturing cost, compact production process, and reduced processing. The effect of the process

Inactive Publication Date: 2012-09-12
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is formed by the common die forging process, the material utilization rate of the produced parts is low, there are many subsequent processing procedures, the processing allowance is large, and the manufacturing cost is high.

Method used

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  • Closed-extrusion and molding method of flange
  • Closed-extrusion and molding method of flange
  • Closed-extrusion and molding method of flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The concrete steps of a kind of occlusive extrusion forming method of flange are as follows:

[0017] (1) Prepare the flange blank: the raw material is cut into the flange blank, and the diameter of the blank is calculated according to the diameter of the flange journal, D b =D p +C, where D p , journal diameter, blank diameter D b， C=0-6mm, the size of the axial height h of the blank is determined by the condition that the volume of the blank is equal to the volume of the flange forging.

[0018] (2) Upsetting at the end: Inductively heat the flange blank, and perform local upsetting at the end to obtain the upset flange blank, and provide a preform for radial extrusion.

[0019] (3) Occlusion radial extrusion forming process:

[0020] When the mold is opened, the flange upsetting piece is placed into the cavity of the floating die 5, the upper mold base 2 moves downward, and the upper and lower floating dies are pressed together under the action of the clamping...

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Abstract

The invention discloses a closed-extrusion and molding method of a flange and belongs to the technical field of pressure machining of metal. The molding method comprises the specific steps of: firstly, preparing a flange blank; then carrying out induction heating on the flange blank at a temperature in range of 950-1200 DEG C to obtain a flange upset piece with an upset end part; putting the flange upset piece into a closed-extrusion and molding mould and then carrying out primary molding by utilizing a closed radial extrusion method to obtain an extruding piece of the flange; and carrying out shaft neck reverse extrusion and molding on the extruding piece, and punching inner holes and fins, and finally machining to obtain the flange. The closed-extrusion and molding method disclosed by the invention utilizes a double-floating concave mould structure of a belt lock hook mould closing device, and the flange upsetting piece in a closed type cavity can be extruded in a radial direction by upper and lower convex moulds. The method disclosed by the invention has the characteristics of compact production process, high material utilization rate, good flange quality and low production and manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of metal pressure processing, and in particular relates to an occluded extrusion forming method of a flange. Background technique [0002] The flange is an important part of the automobile transmission system, and its shape feature is a cylindrical piece with a flange. The basic production method of flange forming is currently ordinary forging. It is formed by the common die forging process, the material utilization rate of the produced parts is low, the subsequent processing procedures are many, the processing allowance is large, and the manufacturing cost is high. In order to improve quality and reduce cost, precision forming is used instead of traditional rough forging. The new type of occluded extrusion can carry out precise radial extrusion on such parts, and basically realize hollow forming. The method can significantly improve material utilization rate, reduce machining allowance and reduce manufac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/04B21C23/20B21C25/02
Inventor 郑光文白凤梅
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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