Dual-metal thrust sliding bearing blank preparation method and tooling used by same

Abstract

The invention discloses a dual-metal thrust sliding bearing blank preparation method and a tooling used by the same. The method includes the following steps: in the first step, alloy material and auxiliary materials are mixed: copper alloy particles, copper gas welding flux and charcoal particles are uniformly mixed; in the second step, the mixed alloy material and auxiliary materials are loaded into a mould, and two clamping flange devices respectively press both ends of the mould by means of external force-applying devices; in the third step, an induction heater is arranged on the periphery of the mould, the mould is then rotated, centrifugal rotational speed and the heating power of the induction heater are regulated, and the alloy particle mixture is molten; in the fourth step, the induction heater is removed, the dual-metal blank produced in the third step is put into a movable cooler, a lower water sprayer is first adopted to cool the dual-metal blank for a certain period of time, and an upper water sprayer is then opened to cool the dual-metal blank to room temperature along with the lower water sprayer. The tooling comprises the mould, the clamping flange device and the movable cooler. The process is reasonable, and the defects of dual-metal blanks can be reduced.

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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