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Device and method for preparing bimetallic radial thrust sliding bearing blanks

The invention relates to a sliding bearing and bimetal technology, which is applied in the field of preparation devices for bimetal bearing blanks, and can solve the problems of poor bonding strength between a spray coating and a steel back, inconvenient step-by-step production methods, and unsatisfactory bonding strength. Achieve the effect of simple structure, long service life and high production efficiency

Active Publication Date: 2016-02-24
CRRC QISHUYAN INSTITUTE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this step-by-step approach is inconvenient
At the same time, the bonding strength between the sprayed layer and the steel back obtained by this method of external spraying is not very good; and if the method of electroplating deposition is used, it is not only time-consuming, but also pollutes the environment. At the same time, when the electroplating layer exceeds a certain thickness , the bonding strength between the steel base and the covered metal is not ideal

Method used

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  • Device and method for preparing bimetallic radial thrust sliding bearing blanks
  • Device and method for preparing bimetallic radial thrust sliding bearing blanks

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Embodiment Construction

[0024] Such as figure 1 As shown, a device for preparing a bimetallic radial thrust sliding bearing blank of the present invention includes a mandrel 1, a billet 3, a graphite brick 4, a refractory brick 5 and an induction heater 6, and the billet 3 has a bottom plate 3- 1. The upper inner cavity 3-3 with a larger diameter and the lower inner cavity 3-2 with a smaller diameter, the mandrel 1 is inserted into the upper inner cavity 3-3 with a larger diameter and the lower inner cavity 3 with a smaller diameter -2 and fixed on the bottom plate 3-1 of the billet 3, an annular gap 2 is formed between the outer periphery of the mandrel 1 and the inner wall of the billet 3, the graphite brick 4 is placed at the bottom of the billet 3, and the refractory brick 5 is placed At the bottom of the graphite brick 4, the induction heater 6 surrounds the outer circumference of the billet 3, the graphite brick 4 and the refractory brick 5.

[0025] Such as figure 1 As shown, the mandrel 1 i...

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Abstract

The invention discloses a preparation device for thermometal radial direction thrust sliding bearing blank and preparation method thereof, the preparation device comprises a core rod, billet, graphite brick, refractory brick and induction heater; the method comprises the following steps: scrubbing, degreasing, descaling and drying the fixed core rod and billet; starting the power supply of the induction heater, pre-heating the billet to 200-500 degrees centigrade and stopping heating; locating the copper alloy particle with diameter of 0.5mm-3mm and auxiliary material in the gap formed by the core rod and billet; starting the power supply of the induction heater again for melting alloy particle, stirring the alloy liquid through thin stick, deslagging and degassing and closing the power supply of the induction heater; locating the combined body of the core rod, billet and alloy liquid in the cooling pool and cooling to room temperature. The binding ability of the bearing blank, billet and alloy layer prepared by the preparation device is high, the component segregation, air hole and slag inclusion defect is little, the operation technology is simple and the production efficiency is high.

Description

technical field [0001] The invention relates to a device and method for preparing a casting blank, especially a device and a method for preparing a bimetallic bearing blank. Background technique [0002] Bimetallic sliding bearing blanks are produced by centrifugal casting process, which can better guarantee the bonding strength between bimetallic layers, but bimetallic radial thrust sliding bearing blanks have large differences in diameters of various parts, so it is difficult to guarantee each component by conventional centrifugal casting process. The performance of the part, while the conventional static pouring method is difficult to ensure the quality of the joint surface, and component segregation, pores and slag inclusion defects often occur. The more conventional method for this type of product is to use two steps: firstly, copper alloy is compounded on the axial or radial surface of the steel base, and then a layer of copper alloy is sprayed, sintered or electroplat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16
Inventor 李娄明
Owner CRRC QISHUYAN INSTITUTE CO LTD
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