A kind of solidification process method of spherical surface self-lubricating liner of spherical plain bearing

Abstract

The invention discloses a process method for curing a self-lubricated liner on the spherical surface of a knuckle bearing. The process method comprises the following steps: only heating an inner ring, controlling the temperature of the inner ring to be the curing temperature of a structural adhesive of the self-lubricated liner, keeping the temperature for a while, and conducting the temperature along a temperature conduction route from the inner ring to the self-lubricated liner, an outer ring and a curing sleeve ring in sequence, wherein the temperature of the inner ring is higher than that of the outer ring, the temperature of the outer ring is higher than that of the curing sleeve ring, the expansion of the curing sleeve ring is smaller than that of the outer ring, the expansion of the outer ring is smaller than that of the inner ring, and thus continuous curing pressure, generated between the outer spherical surface of the inner ring and the inner spherical surface of the outer ring in the curing process, to the self-lubricated liner is realized. The process method utilizes the expansion characteristic of a metal material, the inner ring of the knuckle bearing is expanded in the curing process, meanwhile, the outer ring is not expanded or is less expanded, continuous circumferential curing pressure is provided for the self-lubricated liner through the expansion difference between the inner ring and the outer ring with different spherical surface sizes, and thus the strength and the abrasion resistance of the self-lubricated liner are improved.

Description

technical field [0001] The invention relates to a curing process for a spherical surface self-lubricating liner of a joint bearing. Background technique [0002] Usually, in order to stick the PTFE self-lubricating fabric liner to the flat workpiece with structural adhesives, it is generally necessary to pre-press a pressure plate on the liner and rely on the weight of the pressure plate or apply a certain force on it, and at the same time place it in an oven for use. After reaching the curing temperature, a certain curing pressure is always applied during the curing process, so that the PTFE self-lubricating fabric liner can be reliably bonded to the flat workpiece, so that the strength and wear resistance of the liner after curing can meet the quality requirements . [0003] But for joint bearings, since the outer ring and the inner ring are both spherical structures, when pasting PTFE self-lubricating fabrics on the inner spherical surface of the outer ring, a circumfere...

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Problems solved by technology

[0003] But for joint bearings, since the outer ring and the inner ring are both spherical structures, when PTFE self-lubricating fabric is to be pasted on the inner spherical surface of the outer ring, a circumferential pressure must always be applied during the curing process, and the above method of pasting flat It can only provide pressure in one direction, and the shape of the bonding surface of the outer ring of the spherical plain bearing is an inner spherical surface, which requires a circumferential pressure evenly distributed on the spherical surface. The usual method is to fit the spherical plain bearing into a solidified collar with interference In , the size difference between the inner diameter of the curing collar and the outer diameter of the outer ring is used to generate an interference force, which is used as the circumferential curing pressure during the curing process, but in the actual application process, the structural adhesive is in the At the initial stage of curing temperature, the adhesive is in a softened state, and the interference force at this time will be weakened or even disappeared, and the curing pressure cannot be continuously supplied, resulting in the liner strength and wear resistance of the joint bearing not meeting the expected requirements

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