Radial expansion mechanism tool capable of adjusting curing pressure

By using a radial expansion mechanism tooling with adjustable curing pressure, the problem of uncontrollable thermal expansion performance of the polytetrafluoroethylene core rod during repeated heating and cooling is solved, the stability of the curing pressure and the improvement of the bonding quality of the spherical bearing pad are achieved, and the requirements of industrial-scale production are met.

CN223359718UActive Publication Date: 2025-09-19SHANGHAI BEARING TECH RES INST CO LTD
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Patent Information

Application Number
CN202422696389.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-05
Publication Date
2025-09-19
Estimated Expiration
2034-11-05

AI Technical Summary

Technical Problem

In the prior art, the thermal expansion performance of the polytetrafluoroethylene core rod is uncontrollable during repeated heating and cooling, resulting in inconsistent curing pressure of the spherical bearing liner, low reuse rate, and affecting the bonding integrity and processing accuracy of the liner.

Method used

A radial expansion mechanism tooling with adjustable curing pressure is used, including a core shaft, a tapered hole slider, an isolation sleeve, an isolation layer, a baffle and a fastening nut. By adjusting the fastening nut, the tapered hole slider is radially expanded to tighten the isolation sleeve, providing stable curing pressure to ensure that the liner is fully fitted to the outer ring of the spherical bearing.

Benefits of technology

The pressure consistency and bonding quality of the spherical plain bearing liner during curing are improved, the dimensional accuracy control of the parts is improved, the production cost is reduced, and the parts can be reused many times.

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Abstract

The radial expansion mechanism tool capable of adjusting the curing pressure comprises a core shaft, taper hole sliding blocks, an isolation sleeve, an isolation layer, a baffle and a fastening nut, the core shaft is sequentially provided with a clamping section, a taper section and a threaded shaft from left to right, the isolation sleeve is arranged on the taper section in a sleeving mode through the taper hole sliding blocks, and the isolation layer is arranged on the threaded shaft. The taper hole sliding blocks are evenly distributed in the circumferential direction of the taper section and are in sliding fit with the taper section, the isolation layer, the baffle and the fastening nut are sequentially installed on the threaded shaft from left to right, and when the fastening nut moves towards the left side of the threaded shaft, the isolation layer and the baffle can push the isolation sleeve and the taper hole sliding blocks to synchronously move leftwards. According to the utility model, the taper hole slide block expands the spacer sleeve in the radial direction by adjusting the fastening nut, and the spacer sleeve expands the liner to enable the liner to be pressed on the inner side of the outer ring of the knuckle bearing, so that stable pressure can be provided when the liner of the knuckle bearing is cured, and the loading force and demolding requirements when different types of fabric liner type knuckle bearings are cured can be met.
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