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Heat treatment of cam shaft for diesel engine

A camshaft, diesel engine technology, applied in heat treatment furnace, heat treatment equipment, heat treatment process control and other directions, can solve the problems of pollution, product quality is not stable enough, cost increase and so on

Inactive Publication Date: 2007-04-04
YANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this kind of coolant has certain pollution to the environment and certain harm to the operator; in the process of coolant preparation, auxiliary equipment and raw and auxiliary materials need to be added, resulting in increased costs, and the product quality is not stable enough

Method used

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Examples

Experimental program
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Embodiment Construction

[0007] Take the Y380Q diesel engine camshaft as an example, its blank is No. 45 steel. The main process flow of the heat treatment process of the present invention is: pass the camshaft through the sensor inner hole matching the radial dimension of the camshaft, and install it vertically between the upper and lower thimbles of a 30KHZ super-audio frequency quenching machine tool, press from bottom to bottom In the above sequence, first heat the cam gear to about 860°C one by one, spray water to quench (stop cooling when it cools to about 160°C), and then heat and quench the outer circle of the bearing gear one by one. The operation is the same as above. After the two processes are completed , put it into an oven that has been heated to 150 ° C ~ 170 ° C, and keep the temperature for tempering for 4 hours; then after the gear is machined, use the above method to heat the gear to about 850 ° C, spray quenching and cool to 160 ° C Then put it in an oven at 150℃~170℃ for tempering...

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PUM

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Abstract

Treatment of diesel engine cam shaft is carried out by high-frequency heating for cam gear, bearing gear and gear, spraying cooling liquid, quenching, taking water as cooling liquid, coating magnetic-conductive powder onto surface of inductor, stopping cooling at 160degree, controlling temper temperature and time and eliminating heat stress. It's cheap, has no crack and environmental pollution.

Description

technical field [0001] The invention relates to a heat treatment process for a diesel engine camshaft, which is applied in the field of diesel engine processing. Background technique [0002] A diesel camshaft includes a bearing file, a cam file, and a gear file. Its traditional heat treatment process is to install the camshaft vertically between the upper and lower thimbles of the quenching machine tool, and carry out high-frequency heating on the cam gear, bearing gear, and gear gear of the camshaft in a certain order and spray coolant to quench them; due to the cam and The shape of the gear is relatively complicated. The shape of the cross-section of the cam is "heart" shape. The gear is helical, and the tooth thickness is only about two millimeters. It is easy to generate a large stress during the quenching process, resulting in cracks in the above-mentioned parts. . The coolant used in the traditional process generally uses water plus a certain proportion of polyvinyl...

Claims

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Application Information

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IPC IPC(8): C21D9/30C21D1/18C21D1/10C21D11/00
CPCY02P10/25
Inventor 谢小芳
Owner YANGDONG CO LTD
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