Bimetal thrust sliding bearing blank preparation method and used tooling

Abstract

The invention discloses a method for preparing a blank of a bimetallic thrust sliding bearing and the tooling used. The method includes the following steps: the first step, mixing alloy materials and auxiliary materials: uniformly mixing copper alloy particles, copper gas flux, and charcoal particles; The second step is to put the mixed alloy material and auxiliary materials into the mold, and press the two clamping flange devices on the two ends of the mold respectively through the external force application device; the third step is to place the induction heating device on the outer periphery of the mold , then rotate the mold, adjust the centrifugal speed and the heating power of the induction heating device, and melt the alloy particle mixture; the fourth step, remove the induction heating device, and place the bimetallic blank prepared in the third step in a mobile cooling device, First use the lower water spray device to cool for a certain period of time, and then turn on the upper water spray device to work together to cool the bimetallic blank to room temperature. Tooling consists of moulds, clamping flange units and mobile cooling units. The invention has reasonable process and can reduce the defects of bimetallic blanks.

Description

technical field [0001] The invention relates to a centrifugal casting method of a bimetallic thrust sliding bearing blank and the used tooling. Background technique [0002] Induction heating-particle centrifugal casting process is to put prefabricated alloy particles with qualified components into the steel shell, place them in the intermediate frequency inductor and rotate around the axis, the current input to the intermediate frequency inductor generates a strong surface eddy current on the steel shell and It penetrates into the inner layer of the steel shell layer by layer, so that the steel shell heats up rapidly and melts the alloy particles. The centrifugal force generated by the rotation evenly adheres the alloy liquid to the inner surface of the steel shell, and at the same time separates the non-metallic inclusions and metal oxides from the alloy body. After the heating is stopped, rapid cooling is performed to completely solidify the alloy liquid on the steel matr...

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Problems solved by technology

[0003] Due to the high technical requirements of the bimetallic thin-walled cylindrical blank, the entire process is difficult to control, and the effective combination of the thrust surface steel back and the alloy in the bimetallic thrust sliding bearing blank is considered impossible to achieve. At present, domestic Most of the products rely on imports. After many products adopt the conventional static casting method and the conventional centrifugal casting method, various defects often appear on the thrust surface, and the performance is difficult to meet the requirements. Therefore, reasonable process equipment and reasonable process methods are used to It is of practical significance to prepare high-performance bimetallic thrust sliding bearing blanks

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