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Method for producing large bimetal regulating nut

A technology for adjusting nuts and manufacturing methods, applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve the problems of high production cost, poor reliability, short life, etc., to reduce weak bonding force, increase reliability, improve The effect of mechanical properties

Inactive Publication Date: 2007-01-24
DALIAN SANHUAN COMPOSITE MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of high production cost, poor reliability, low efficiency and short life in the prior art, and provides a method for manufacturing large bimetallic nuts with low manufacturing cost, reliable quality and high production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] a. Cast a nut blank with carbon steel as raw material and rough machine the inner cylindrical surface to make a carbon steel nut matrix;

[0018] b. Derust, degrease and dry the carbon steel nut base according to conventional methods;

[0019] c. Put the dried carbon steel nut matrix into the borax melt used in the existing centrifugal casting, and heat it to 850-900°C;

[0020] d. Take out the carbon steel nut matrix from the borax melt, remove the excess borax melt on the inner and outer surfaces of the nut and quickly fix the carbon steel nut on the centrifuge, and centrifugally pour the brass alloy onto the inner cylindrical surface of the carbon steel nut matrix, The raw materials and weight ratio of the brass alloy are as follows: Cu60-65%, Zn25-30%, Sn1.5-5%, Mn2.5-4%, Fe1.5-3%, Ni1-3%;

[0021] e. Take out the bimetallic nut blank from the centrifuge and cool it to room temperature with water;

[0022] f. According to the conventional method of stress relief t...

Embodiment 2

[0024] Others are the same as in Example 1, except that the borax melt used is a mixed solution of borax, boric acid, potassium fluoride, and the weight ratio of raw materials is as follows: borax 40-60%, boric acid 25-45%, potassium fluoride 5-15% .

Embodiment 3

[0026] Others are the same as in Example 1 or Example 2, except that the carbon steel nut is taken out from the borax melt, the excess borax melt on the inner and outer surfaces of the nut is removed, and the carbon steel nut matrix is ​​fixed on the centrifuge for 1 to 2 minutes for centrifugal casting. The rotating speed of the machine is 800r / min, and after 5-8 minutes of centrifugal rotation, a copper alloy layer with a thickness of 5-20mm is formed on the surface of the inner cylinder of the carbon steel substrate.

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Abstract

The method includes following steps: casting and roughening inner cylindrical face from carbon steel to prepare basal body of nut in carbon steel; carrying out rust removing, degreasing, and drying processes for the basal body; putting the basal body into borax liquation, and heating to 850-900 deg.C; taking the basal body out from the borax liquation, removing redundant borax liquation from outer and inner surface of basal body of nut; then fixing nut in carbon steel on centrifuge rapidly, centrifugal casting brass alloy onto surface of inner cylindrical face of basal body of nut in carbon steel, materials and proportioning by weight of brass alloy are as following: Cu 60-65%, Zn 25-30%, Sn 1.5-5%, Mn 2.5-4%, Fe 1.5-3%, Ni 1-3%; taking bi metallic nut rough out from centrifuge, water cooling it to room temperature; process of removing stress, and shaping. Advantages are: low cost, reliable quality of product, and high production efficiency.

Description

Technical field: [0001] The invention relates to a manufacturing method of a bimetallic adjusting nut, in particular to a manufacturing method of a large bimetallic adjusting nut applied to heavy mechanical equipment. Background technique: [0002] In the past, the large adjusting nuts used in heavy machinery equipment were mainly made of copper alloy or cast iron. The disadvantages of copper alloy nuts are high manufacturing cost and low strength; the disadvantages of cast iron nuts are poor friction and wear resistance and high noise during operation. In order to overcome the existing problems of copper alloy nuts and cast iron nuts, people have developed bimetallic nuts. [0003] The base material of the bimetallic nut is carbon steel, and the thread part material is non-ferrous metal (ZQA19-4, ZQSn6-6-3 cast aluminum bronze, aluminum-based rare earth and other materials) compounded on the carbon steel base. Since the existing non-ferrous metals cannot be firmly compound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B37/00C01B35/12B22D13/00
Inventor 王子明郑东旭
Owner DALIAN SANHUAN COMPOSITE MATERIAL TECH DEV
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