A method of manufacturing molded self-lubricating joint bearings

Abstract

The invention discloses a manufacturing method of a molding type self-lubricating knuckle bearing. The manufacturing method comprises the following steps that an outer ring semi-finished product and an inner ring are machined, wherein the outer ring semi-finished product is provided with a through hole; an auxiliary gasket layer is placed in the through hole, the inner ring is placed in the through hole, the auxiliary gasket layer is located between the inner ring and the outer ring semi-finished product, the outer ring semi-finished product is extruded, and the extruded auxiliary gasket layeris filled with a cavity formed between the inner ring and the outer ring semi-finished product; an outer rotative surface of outer ring semi-finished product is machined, two ends of the outer ring semi-finished product are machined to remove margin at the two ends of the outer ring semi-finished product, the auxiliary gasket layer is removed, and a lubricating material is a cavity filled betweenan outer ring and the inner ring. The manufacturing method has the following advantages that the auxiliary gasket layer is introduced, the deformation effect of the outer ring is supported in the extrusion process, so that the shape of extrusion forming shape is accurate, the size precision is high, the outer ring ellipse is small after extrusion, twisting is avoided, the gasket layer can eliminate the gap between the inner ring and the outer ring after extruded, and the coaxiality and the cavity symmetry degree of the inner ring and the outer ring in the extruded machining are easy to control, so that the radial sealing degree and the circumferential sealing degree of the bearing can be accurately controlled.

Description

Technical field [0001] The invention relates to a method for manufacturing joint bearings, in particular to a method for manufacturing molded self-lubricating joint bearings. Background technique [0002] The molded self-lubricating layer joint bearing is a spherical plain bearing. Its typical feature is that a layer is injected into the cavity between the inner ball of the outer ring and the outer spherical surface of the inner ring, which is low friction, high load, and resistant to the outer ring. Grinding lubricating material, the inner ring can swing flexibly during use without lubrication. In the manufacturing process of molded self-lubricating radial joint bearings, the outer ring of the bearing needs to be precisely processed to create a cavity with a large gap and high precision before injecting lubricating materials. The existing manufacturing methods of molded self-lubricating joint bearings are described in CN201110361372.3, CN201710198042.4, and CN201310061370.1. A...

AI Technical Summary

Problems solved by technology

Due to the existence of the cavity, subsequent processing and positioning are difficult, resulting in poor coaxiality and symmetry of the processed product, and poor precision of the radial and circumferential tightness of the bearing.

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