Manufacture method of vehicle rocker arm bearing

Abstract

The invention relates to a manufacture method of a needle roller bearing, in particular to a manufacture method of a rocker arm bearing which is required in the work of an engine valve of a motorcycle. The invention aims at solving problems existing in the current manufacture industry of vehicle rocker arm bearings and providing a manufacture method of a vehicle rocker arm bearing which has high accuracy and resists impact load. The manufacture method of a vehicle rocker arm bearing comprises the following steps of: a) processing an outer sleeve of the bearing, adopting a drum-shaped grindinghead (grinding wheel) to carry out coarse grinding on the inner diameter of the outer sleeve, ensuring that one second of the total length of the grinding head is in the outer sleeve during grinding,and using a small cylindrical grinding wheel for refine grinding; b) processing a cylindrical needle roller of which the chamfer width is smaller than or equal to 1mm; c) processing an inner sleeve (hollow pin shaft) of the bearing, first carrying out thermal refining on the raw materials of the inner sleeve, and then carrying out stress relief processing after coarse grinding and before refine grinding; and d) assembling the needle roller with the inner sleeve and the outer sleeve to obtain the bearing product.

Description

technical field [0001] The invention relates to the manufacture of needle roller bearings, in particular to the manufacture method of rocker arm bearings in the valve operation of automobile and motorcycle engines. Background technique [0002] The rocker arm bearings of automobiles and motorcycles are rocker arm parts in the operation of engine valves. When the valves are working, they are affected by the rotation of the camshaft and the rocker arms are in the unfolded and closed working states. The frequency of opening and closing changes accordingly, and the rocker arm is in a state of knocking up and down, with a rate of 5,000 times per minute. When the rocker arm is working, it relies on the rocker arm bearing to rotate, and the rocker arm bearing needs to bear a huge knocking load. [0003] The rocker arm bearing is composed of an outer ring, rolling elements (needle rollers), and an inner ring (inner sleeve pin). Due to the relatively small dimensions, the measurement...

AI Technical Summary

Problems solved by technology

Since the pin shaft of the inner sleeve (the outer diameter is 8mm, the inner diameter is 5mm) is in the shape of a hollow shaft, and the thickness of the pipe wall is only 1.5mm, the inner sleeve is very easy to follow the medium line during the working process of high-strength impact and extreme pressure. break

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