Blind hole rectangular spline cold extrusion forming method

A molding method and cold extrusion technology, applied in metal extrusion dies, metal processing equipment, etc., can solve the problems of reducing product service life, destroying metal streamline structure, and long processing cycle.

Inactive Publication Date: 2017-02-22
重庆恒望机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 ...

Method used

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  • Blind hole rectangular spline cold extrusion forming method
  • Blind hole rectangular spline cold extrusion forming method

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Embodiment Construction

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

[0028] In the method for cold extrusion molding of blind hole rectangular splines of this embodiment, the processing steps are: blanking→heating→pier billet→hot forging rough forming→normalizing→shot blasting→surface treatment→cold extrusion molding;

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

[0030] In the hot forging rough forming process, a friction press or an electric screw press is used to hot forge the blank to make the blank reach the required rough state;

[0031] In the normalizing process, the continuous mesh belt mult...

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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 molds, and specifically is a blind hole rectangular spline cold extrusion molding method. Background technique [0002] Extrusion is a kind of advanced manufacturing technology without chip forming, it has the advantages of high quality, high efficiency, low energy consumption and so on. 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 they can meet the processing requirements to a certain extent, they have the shortcomings of long processing cycle and low production efficiency during production, and the metal streamline structure is destroyed, thereby reducing The service life of the product. Summary of the invention [0003] In view of this, the purpose of the present invent...

Claims

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Application Information

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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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