Cold forging process for rotor and reverse hole extrusion die

A technology of back-extrusion hole and process, which is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problem of high production cost of the rotor powder metallurgy forming method, and achieve the elimination of the risk of fracture and cracking, internal organization Tight, safety-enhancing effect

Inactive Publication Date: 2016-10-12
BINKE AUTOMOBILE FASTENER KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a rotor cold forging forming process, which is used to solve the problems of defects in the rotor prepared by the powder metallurgy forming method and high production cost of the powder metallurgy forming method

Method used

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  • Cold forging process for rotor and reverse hole extrusion die
  • Cold forging process for rotor and reverse hole extrusion die
  • Cold forging process for rotor and reverse hole extrusion die

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Embodiment Construction

[0024] The present invention will be further elaborated below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention, not to limit the scope of application of the present invention.

[0025] Please refer to image 3 , the present invention provides a reverse extrusion hole die, comprising an upper die pad 31, an upper die shell 32, an upper die punching pin 33, a lower die 41, a lower die pad 42 and a lower die punching pin 43, the upper die The punching pin 33 is arranged in the upper die shell 32 and fixed on the upper die pad 31, the inner wall of the lower die 41 surrounds and forms a lower die cavity for forming the rotor, and the lower die punching pin 43 Fixed on the lower die pad 42 and located in the lower die cavity, the upper die punching pin 33 is provided with a cross-shaped punch, and the punch and punch needle junction of the upper die punching pin 33 is covered Set gasket (not shown...

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PUM

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Abstract

The invention discloses a cold forging process for a rotor. The cold forging process comprises the steps of blanking, reverse hole extrusion and machining. The step of reverse hole extrusion specifically comprises the procedures that a blank is arranged in a lower die chamber and is located on a low die punching needle, a volume dividing space is reserved between the lower die punching needle and the inner wall of a lower die, an upper die punching needle punches downwards, a crossed blind hole is formed at one end of the blank, the punch needle of the upper die punching needle is in contact with the inner wall of the lower die by a sleeving washer so as to limit the blank to flow along a direction reverse to the punching direction, the blank flows along the punching direction to fill up the volume dividing space, a cylindrical blind hold is formed at the other end of the blank, an opening is formed along the direction of the diameter of the cylindrical blind hole, the depth of the opening is the same to that of the cylindrical blind hole, the internal tissue of the rotor formed by the cold forging process of the rotor is dense, thus completely eradicating the risk of product breakage and fracture, and improving the safety of vehicle; and the invention further provides a reverse hole extrusion die which is used for forming the rotor.

Description

technical field [0001] The invention relates to a cold forging process of a rotor and a reverse extrusion hole die. Background technique [0002] Such as Figure 1~3 The shown rotor is used for vehicle assembly, the rotor includes a large end and a small end, the large end is provided with a cylindrical blind hole 10, and an opening is arranged along the direction of the diameter of the cylindrical blind hole, and the opening The depth is the same as that of the cylindrical blind hole, the small end is a screw hole 30, and the top of the screw hole 30 is provided with a cross-shaped blind hole 20. At present, the rotor is formed by powder metallurgy. The inside of the molded rotor is loose, even has gaps, and there is a risk of cracking. Each finished product needs magnetic particle inspection to ensure the pass rate, which increases the production cost. Contents of the invention [0003] The invention provides a rotor cold forging molding process, which is used to solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/10B21J13/02
CPCB21J5/002B21J5/10B21J13/02
Inventor 王普龙
Owner BINKE AUTOMOBILE FASTENER KUNSHAN
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