Camshaft argon arc remelting production and machining process

A processing technology, camshaft technology, applied in the direction of cams, belts/chains/gears, components with teeth, etc., can solve the problems of insufficient depth of chilling layer, low hardness of camshafts, low processing efficiency, etc., to achieve crystal The effect of small particles, low scrap rate and low cost

Inactive Publication Date: 2015-10-07
ANQING JIAN AUTO PART FORGING & ROLLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness of the camshaft produced by the prior art is not high, the depth of the chilling layer is not enough

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0011] A camshaft argon arc remelting production and processing technology, the camshaft processing technology includes the following steps: placing a long round material on a punching machine to cut it; placing the cut round material on Preheating in the heating equipment, induction heating to 950°C, the heating rate is 75°C / s; then induction heating the preheated camshaft to 1100°C, the heating rate is 60°C / s; Satisfy 28~30HRC; place the heated material in the forming mold, and forge the material by punching; then under the action of arc high temperature (6000-8000K), use the protection of argon laminar flow to form a small melting point on the surface of the cam. pool, after the arc transfer, the molten pool is quenched by the workpiece itself to absorb heat to obtain a fine ledeburite structure, and the turning and deburring processes are performed. Turning and fine grinding are processed according to cam rough grinding and fine grinding, and helical gears are processed ac...

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PUM

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Abstract

The invention discloses a camshaft argon arc remelting production and machining process. The camshaft machining process includes the following steps that a strip round material is placed on a punch to be cut off; the cut-off round material is placed in a heating device to be preheated, and the round material is heated to 900 DEG C to 1000 DEG C in an induction mode, wherein the heating rate ranges from 70 DEG C/s to 80 DEG C/s; then a preheated camshaft is heated to 1000 DEG C to 1200 DEG C in an induction mode, wherein the heating rate ranges from 50 DEG C/s to 60 DEG C/s; thermal refining is conducted, and hardness is made to range from 28 HRC to 30 HRC; the heated material is placed in a forming die, and the material is formed through punch forging; then under the arc high-temperature effect, tiny molten pools are formed on the surface of a cam through protection of argon laminar flow, after arc transfer, the molten pools are chilled through heat absorption of a workpiece, fine ledeburite tissue is obtained, and turning and deburring are conducted. The grains of the camshaft are fine, abrasion resistance of the camshaft is higher than that of chilled cast iron, mechanization is easy to achieve, quality is stable, the rejection rate is low, and cost is low.

Description

technical field [0001] The invention relates to the technical field of camshaft processing, in particular to a camshaft argon arc remelting production and processing technology. Background technique [0002] The camshaft is one of the key parts in the gas distribution system of an internal combustion engine. The entire gas distribution mechanism is driven by the camshaft. The design of the cam plays a decisive role in the performance of the entire gas distribution system. The camshaft has poor rigidity and is easy to deform; it has high precision and is difficult to process; with the continuous development of the automobile industry and the demand for accessories, the demand for camshafts has remained high. [0003] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (the speed of the camshaft is the same as that of the cran...

Claims

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Application Information

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IPC IPC(8): B23P15/14
CPCB23P15/14B23P2700/02
Inventor 査凌宇
Owner ANQING JIAN AUTO PART FORGING & ROLLING
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