Cold Extrusion Forming Method of Rectangular Spline with Blind Hole

A forming method and cold extrusion technology, applied in the direction of metal extrusion dies, etc., can solve the problems of long processing cycle, reduced product service life, and damaged metal streamline structure

Inactive Publication Date: 2018-06-15
重庆恒望机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing rectangular internal splines are generally processed by slotting. Although it can meet the processing requirements to a certain extent, it has the disadvantages of long processing cycle and low production efficiency, and destroys the metal streamline structure, thereby reducing the cost. product lifespan

Method used

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  • Cold Extrusion Forming Method of Rectangular Spline with Blind Hole
  • Cold Extrusion Forming Method of Rectangular Spline with Blind Hole

Examples

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0028] The cold extrusion forming method of blind hole rectangular splines in this embodiment includes the following processing steps: blanking → heating → pier blank → hot forging rough forming → normalizing → shot blasting → surface treatment → cold extrusion forming;

[0029] Among them, in the heating process, the blank is heated to 1100°C to reduce the deformation resistance of the blank and prevent overheating and overburning, and then use the punch to pier the blank;

[0030] In the hot forging rough forming process, use a friction press or an electric screw press to carry out hot forging rough forming on the billet, so that the billet can reach the required rough billet sta...

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PUM

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Abstract

The invention discloses a blind hole rectangular spline cold extrusion forming method. The blind hole rectangular spline cold extrusion forming method includes the machining procedures of cutting, heating, blank upsetting, hot forging rough forming, normalizing, shot blasting, surface treatment and cold extrusion forming, wherein in the heating procedure, after a blank material is heated to 1100 DEG C, a punch press is utilized for blank upsetting; in the surface treatment procedure, macromolecule phosphating liquid is used for performing phosphating treatment on the blank material, and the surface of the blank material is softened and lubricated; and in the cold extrusion procedure, a cold extrusion forming mold is adopted to performing cold extrusion forming on the blank material. The blind hole rectangular spline cold extrusion forming method can meet the machining forming requirement of a blind hole spline and is high in machining efficiency and good in forming precision, a metal streamline structure can be completely reserved, the product quality is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal extrusion molding dies, in particular to a blind hole rectangular spline cold extrusion molding method. Background technique [0002] Extrusion forming is an advanced manufacturing technology of chipless forming, which has the advantages of high quality, high efficiency and low energy consumption. Rectangular internal splines are widely used in mechanical equipment such as automobiles, tractors, and construction machinery, and are in great demand in actual production. The existing rectangular internal splines are generally processed by slotting. Although it can meet the processing requirements to a certain extent, it has the disadvantages of long processing cycle and low production efficiency, and destroys the metal streamline structure, thereby reducing the cost. The useful life of the product. Contents of the invention [0003] In view of this, the purpose of the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02B21C23/02B21J5/08C21D1/28B24C1/10
CPCB21C23/02B21C25/02B21J5/08B24C1/10C21D1/28
Inventor 杜毅
Owner 重庆恒望机械有限公司
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