Method for manufacturing brake drum for automobile

A production method and brake drum technology, applied in the direction of brake drums, etc., can solve the problems of reducing the safety factor of the whole vehicle and reducing the service life of brake drums, so as to improve the driving safety factor, prolong the service life, and solve the problems of easy cracking and easy The effect of loss

Inactive Publication Date: 2010-01-06
河南省汤阴县华兴机械制造有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

This greatly reduces the service life of the brake drum and reduces the safety factor of the vehicle.

Method used

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  • Method for manufacturing brake drum for automobile
  • Method for manufacturing brake drum for automobile

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Embodiment Construction

[0009] First make the brake sleeve 1, make it into a hollow circular drum shape with gray cast iron HT250, the wall thickness of the upper part is not less than 20mm, the lower part is not less than 10mm, and an annular groove 1 is processed on the outer surface 20mm below the top edge of the brake sleeve 1 -1, it is 20mm wide and 10mm deep. Ten protruding longitudinal reinforcing ribs 1-2 integrated with the brake sleeve 1 are evenly distributed on the lower part of the outer annular surface of the brake sleeve 1 . Put the brake sleeve 1 into the casting molding cavity of the outer sleeve 2 casting mold, and then pour the ring graphite cast iron QT450-15 to form the outer sleeve 2 by using the inlay casting technology. The lower part makes the combination between the brake sleeve 1 and the overcoat 2 firm and difficult to disengage. Brake sleeve 1 is used as the lining of overcoat 2 top, and its bottom is apart from overcoat 2 bottom about 1 / 5th place. A high-performance br...

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Abstract

The invention provides a method for manufacturing a brake drum for an automobile, which relates to a method for manufacturing a brake drum which is a part of an automobile. The brake drum uses a hollow circular drum which is made of gray cast iron HT250 as a brake sleeve of an inner lining, and an outer sleeve which is made of ductile cast iron QT450-15 is tightly coated outside the brake sleeve. The method for manufacturing the brake drum comprises the following steps: firstly, processing the brake sleeve; putting the brake sleeve into a casting forming cavity of an outer sleeve casting mold; and then, casting the outer sleeve by thermal inlaying and casting technology. An annular groove is formed at the upper part of the side surface outside the brake sleeve, and a plurality of convex longitudinal strengthening ribs are arranged at the lower part. The invention has the advantages that the brake drum is made of two kinds of materials and takes respective advantages of the materials, thereby effectively solving the problems of easy cracking and each loss of the brake drum, prolonging the service life of the brake drum by 80-300%, and greatly improving the safety coefficient of the automobile in the running process.

Description

1. Technical field [0001] The invention relates to a method for manufacturing a brake drum of an automobile part. 2. Background technology [0002] The brakes used in automobiles are divided into two types: drum type and disc type. Drum brakes are the most commonly used brakes on automobiles. Its working side surface is the inner surface of a cylinder, and its fixed element is an arc-shaped brake pad with friction pads. Its advantages are low cost and dustproof. The brake drum applies a braking torque to the rotating element through the fixed element in it to reduce the rotational angular velocity of the latter, and at the same time relies on the adhesion between the wheel and the ground to generate the braking force of the road on the wheel to slow down the car. [0003] For a long time, the material of the brake drum is mainly gray cast iron HT250. Practice has proved that the temperature of the brake drum will rise due to friction during braking, and then it will cool do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16F16D65/10
Inventor 罗庆国刘天平王爱丽马保生罗学峰王有林王沛清
Owner 河南省汤阴县华兴机械制造有限公司
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