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Centrifugal casting method of bearing bushes

A technology of centrifugal casting and bearing bush, which is applied in the field of centrifugal casting of bearing bush, which can solve problems such as failure to meet high performance requirements, abnormal viscosity of lubricating oil, and damage to sliding bearings, and achieve the effects of less casting defects, improved work efficiency, and reduced costs

Inactive Publication Date: 2014-06-18
SUZHOU JIEDERUI PRECISION MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is direct friction between the bearing bush and the shaft due to poor lubrication, the friction will generate a high temperature. Although the bearing bush is made of a special high temperature resistant alloy material, the high temperature generated by direct friction is still enough to put the bearing bush and If the shaft burns out, it may also be caused by factors such as excessive load, high temperature, impurities in the lubricating oil or abnormal viscosity, etc. The sliding bearing will be damaged after burning the tile.
[0003] At present, most of the functional layers of bearing pads use "lead-tin-copper" electroplating. However, with the advancement of science and technology, the performance requirements for bearing pads are also further improved. The traditional ternary alloy electroplating layer cannot meet the high performance requirements. This requires us to seek a good bearing pad functional layer

Method used

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Embodiment Construction

[0022] Before the bearing bush is cast, pretreatment is carried out to ensure the subsequent casting quality.

[0023] The method steps of preprocessing are as follows:

[0024] 1: Remove oil stains;

[0025] 2: Preheat in a box-type electric furnace at 350°C±20°C for about 1.5 hours or more;

[0026] 3: Immerse in hydrochloric acid solution for about 8-10 seconds to remove rust;

[0027] 4: Keep warm in boiling water at about 100°C;

[0028] 5: Take out the steel tile, and use the waste heat to immediately brush mud on the non-working surface of the workpiece, and apply flux to the working surface.

[0029] The pretreated steel tile can enter the tin immersion process. The temperature of the solution in the pure tin pot should be 360°C±20°C. If the temperature of the tin liquid is too low, the fluidity is poor, the grains are thick, and the billet is not well tinned, which will directly affect the alloy. The bonding quality with the steel tile; if the temperature of the m...

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Abstract

The invention discloses a centrifugal casting method of bearing bushes. The centrifugal casting method comprises the following steps: preprocessing steel brushes; dipping the steel brushes with tin; melting tin-based bearing Babbitt alloys; casting; checking and the like. The products cast by the method are high in size precision, small in machining allowance and few in casting defects. The method has the advantages that the working efficiency is improved and the cost is reduced and plays a role of guiding actual production.

Description

technical field [0001] The invention relates to the casting field, in particular to a bearing pad centrifugal casting method. Background technique [0002] Sliding bearings are generally used in low-speed and heavy-load conditions, such as internal combustion engines, but the frictional resistance of sliding bearings is relatively large. It is necessary to install a bearing bush that matches the journal on the part of the shaft supported by the bearing. When the sliding bearing is working, the bearing bush and the shaft A thin oil film is required between them for lubrication. If there is direct friction between the bearing bush and the shaft due to poor lubrication, the friction will generate a high temperature. Although the bearing bush is made of a special high temperature resistant alloy material, the high temperature generated by direct friction is still enough to put the bearing bush and If the shaft burns out, it may also be caused by factors such as excessive load, ...

Claims

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Application Information

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IPC IPC(8): C23C6/00B22D13/00C23C2/08C23C28/02
Inventor 姚振红
Owner SUZHOU JIEDERUI PRECISION MACHINERY
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