A method for curing self-lubricating spherical plain bearings using release shrink film

Abstract

The invention discloses a method for solidifying a self-lubricating joint bearing by using a release shrink film, which comprises: making the release shrink film into a cylindrical shape; placing the cylindrical release shrink film on the outer spherical surface of the inner ring; The inner ring of the release shrink film is baked in an oven so that the release shrink film shrinks and sticks tightly to the outer spherical surface of the inner ring; paste the PTFE fabric gasket to the inner spherical surface of the outer ring, and then put the inner ring into the In the outer ring; cure the inner ring and the outer ring with the liner together; rotate the cured self-lubricating joint bearing inner ring around the radial direction of the outer ring by 60°~90°, remove the release shrink film, Make the self-lubricating joint bearing form the required uniform radial clearance value. It has the following advantages: the release shrink film can effectively protect the outer spherical surface of the inner ring from bonding with the PTFE fabric liner during the curing process; the release shrink film has good toughness and will not It is scratched and damaged, and it is guaranteed to be completely released from the mold.

Description

technical field [0001] The invention relates to a method for solidifying a self-lubricating joint bearing by using a release shrink film. Background technique [0002] In the existing self-lubricating joint bearings, the front and back sides of the PTFE fabric liner are coated with adhesive. The release agent is coated on the outer spherical surface of the inner ring. In addition, self-lubricating spherical plain bearings usually require a certain radial clearance, but the radial clearance between the inner and outer rings after the existing processing method is cured is basically zero, so it is necessary to remove the cured inner ring from Take out the outer ring, and then replace the inner ring with a smaller outer ball diameter according to the design radial clearance requirements of the bearing. The difference in diameter of the inner ball is the radial clearance value of the bearing. [0003] Problems in this method: 1. The release agent coated on the outer spherical...

AI Technical Summary

Problems solved by technology

[0003] Problems in this method: 1. The release agent coated on the outer spherical surface of the inner ring is attached to the outer spherical surface of the inner ring by soaking in a liquid release agent, but it cannot ensure that a protective film with uniform thickness is formed on the spherical surface, resulting in coating The layer is uneven, and when it is in contact with the sticky fabric pad, it will be partially unable to be released from the mold when it is cured, resulting in curing failure; 2. In order to prevent the above-mentioned local non-release situation, it needs to be soaked multiple times, generally more than three times , the processing efficiency is low; 3. Even if the method of multiple soaking is adopted, spherical friction will occur during the assembly process of putting the inner ring into the outer ring, and part of the release agent coating layer on the outer spherical surface of the inner ring will still be scratched Wipe off, resulting in poor demoulding effect or even curing failure; 4. The release agent is expensive, and it is a volatile chemical, which pollutes the environment and is harmful to the health of operators; 5. The existing processing methods cannot To obtain the required radial clearance after the bearing is cured, it is necessary to replace the inner ring with a smaller outer ball diameter, which is inefficient, and because the outer spherical surface tolerance of the inner ring for curing and the newly replaced inner ring is not the same may be exactly the same, so it will cause the final spherical coupling accuracy of the inner and outer rings to be unsatisfactory, which will eventually lead to a low service life of the bearing