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Mold and method for manufacturing bimetal composite sliding bearing

A technology for sliding bearings and manufacturing methods, which is applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., and can solve the problems of multiple sintering and rolling composite coil welding processes, low bonding strength of bimetallic bearings, and unstable quality of welds and other problems, to achieve the effect of firm interface, low scrap rate and wide application range

Inactive Publication Date: 2011-10-12
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the bimetallic bearings manufactured by the centrifugal casting method have low bonding strength, the lining layer obtained by the lost foam method has low density, and the sintering and rolling composite roll welding method has many procedures, high cost and unstable quality of the weld seam The problem

Method used

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  • Mold and method for manufacturing bimetal composite sliding bearing
  • Mold and method for manufacturing bimetal composite sliding bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] A method for manufacturing a bimetallic composite sliding bearing, the preparation method comprising the steps of:

[0040] Step 1: Put the steel sleeve 3 with a preheating temperature of 200°C into the lower mold 4, and pour the alloy liquid 6 with a temperature of 1160°C into the pressure chamber 5. Steel sleeve 3 is Q235 steel, and alloy liquid 6 is copper-based alloy ZCuPb5Sn5Zn5.

[0041] Step 2: While the upper mold 2 is moving downward and the lower mold 4 is closed and kept under pressure, the indenter 8 is moved up to press the alloy liquid 6 into the annular space formed by the steel sleeve 3 and the steel core 1, and keep the pressure until the alloy liquid 6 is completely Solidification, holding pressure 21MPa, forming the lining layer of bimetallic composite sliding bearing.

[0042] Step 3: The steel core 1 is moved downward by 5mm to pressurize the lining layer, so that the lining layer is further combined with the steel sleeve 3 until the solidified lay...

Embodiment approach 2

[0046] The difference between the second embodiment and the first embodiment

[0047] Step 1: Put the steel sleeve 3 with a preheating temperature of 500°C into the lower mold 4, and pour the alloy liquid 6 with a temperature of 1200°C into the pressure chamber 5. The steel sleeve 3 is stainless steel, and the alloy liquid 6 is copper-based alloy CuZn37Mn2Al2Si.

[0048] Step 2: While the upper mold 2 is moving downward and the lower mold 4 is closed and kept under pressure, the indenter 8 is moved up to press the alloy liquid 6 into the annular space formed by the steel sleeve 3 and the steel core 1, and keep the pressure until the alloy liquid 6 is completely Solidification, holding pressure 150MPa, forming the lining layer of bimetallic composite sliding bearing.

[0049] Step 3: The steel core 1 moves downward for 20 mm to pressurize the liner, so that the liner is further combined with the steel sleeve 3 until the solidified layer at the bottom of the steel core 1 is sep...

Embodiment approach 3

[0051] The difference between the third embodiment and the first embodiment

[0052] Step 1: Put the steel sleeve 3 with a preheating temperature of 350°C into the lower mold 4, and pour the alloy liquid 6 with a temperature of 1180°C into the pressure chamber 5. Steel sleeve 3 is Q235 steel, and alloy liquid 6 is copper-based alloy ZCuPb10Sn10.

[0053] Step 2: While the upper mold 2 is moving downward and the lower mold 4 is closed and kept under pressure, the indenter 8 is moved up to press the alloy liquid 6 into the annular space formed by the steel sleeve 3 and the steel core 1, and keep the pressure until the alloy liquid 6 is completely Solidification, holding pressure 80MPa, forming the lining layer of bimetallic composite sliding bearing.

[0054]Step 3: The steel core 1 is moved downward by 10mm to pressurize the lining layer, so that the lining layer is further combined with the steel sleeve 3 until the solidified layer at the bottom of the steel core 1 is separat...

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Abstract

The invention discloses a mold and a method for manufacturing a bimetal composite sliding bearing, and relates to a mold and a method for manufacturing a sliding bearing. The mold and the method are suitable for manufacturing bimetal composite sliding bearings of various specifications, and solve the problems that the conventional bimetal bearing has low bonding strength, high cost and unstable weld seam quality. The method comprises the following steps of: putting a steel sleeve with the preheating temperature of between 200 and 500 DEG C into a lower mold, and pouring alloy liquid with the temperature of between 250 and 1,200 DEG C into a pressure chamber; closing the mold, and keeping the pressure; making a steel core move downwards 5 to 20mm to pressurize a lining layer so as to obtain a blank of the bimetal composite sliding bearing; and pulling the steel core out, taking the blank out, and processing to achieve the required size so as to obtain the bimetal composite sliding bearing. A gap between a pressure head and the pressure chamber of the used mold is +0.08 to +0.30mm; the upper section of the steel core is a straight-line section, and the lower section of the steel core is a round table with the taper of 0.1 to 1 degree; the diameter of a through hole of an upper mold at room temperature is equal to that of a large end of the steel core at room temperature, namely +0.20 to +0.60mm; and the taper of a through hole of the lower mold is 0.1 to 1 degree.

Description

technical field [0001] The invention relates to a manufacturing mold of a bimetallic composite sliding bearing and a manufacturing method thereof, which are suitable for the preparation of bimetallic composite sliding bearings of various specifications. Background technique [0002] Bimetallic composite bearings are double-layer bearings with steel as the outer layer and alloy as the inner layer. The inner layer plays the role of anti-wear lubrication and heat dissipation, and the outer layer provides the necessary mechanical properties. compared to single layer bearings. It has the outstanding advantages of material saving and good comprehensive performance, and is widely used in mechanical equipment in various industries such as metallurgy, mining, chemical industry, electric power, coal, and building materials. In the prior art, there are many methods for preparing bimetallic composite sliding bearings, which can be summarized into three categories: centrifugal casting,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/08B22D19/16F16C17/00F16C33/02
Inventor 邢书明于冬鲍培玮
Owner BEIJING JIAOTONG UNIV