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Low-melting point alloy for machining connecting conduct, its production and use

A low melting point, alloy technology, applied in the direction of metal processing equipment, turning equipment, milling machine equipment, etc., can solve the problems of fragility, affecting the accuracy of machine tools, and difficult to process qualified parts, so as to achieve the effect of ensuring strength and convenient processing

Active Publication Date: 2007-04-04
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of filling the pipe with rosin is generally used to enhance its strength before bending and machining, but the rosin is brittle and fragile due to force during processing, which affects the internal support effect of the pipe, and the crushed rosin at the end of the pipe affects the accuracy of the machine tool, which is very difficult. Difficult to process qualified parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of low melting point alloy as described above is characterized in that the steps are as follows:

[0020] (1) preparing materials, cutting each metal raw material (more than 99.9% of purity) into rice grains or mung bean-shaped granules; weighing each component raw material in proportion;

[0021] (2) To smelt the alloy, turn on the power switch of the heating smelting furnace, mix the elements in proportion and put them into the smelting furnace for smelting, adjust the temperature of the smelting furnace to 400-500°C, when the elements are heated to 400-500°C, Stir for 2 to 3 minutes. After the melt is still, use a spoon to remove the suspended impurities from the surface, and then slowly pour the melt into another clean container. Be careful not to mix the impurities at the bottom, so that the impurities at the bottom can be cleaned. Repeat this process for 3 to 5 times of stirring and cleaning, and finally cast into small pieces to cool.

[0...

Embodiment

[0027] Alloys with different melting points can be obtained according to the following different proportions:

[0028] Example 1. Bismuth 48%, lead 32%, tin 15%, antimony 5%, melting point 95 degrees.

[0029] Example 2, bismuth 50%, lead 26.7%, tin 13.3%, cadmium 10%, melting point 70 degrees.

[0030] Example 3, bismuth 48%, lead 25.63%, tin 12.77%, cadmium 9.6%, zinc 4%, melting point 61 degrees.

[0031] Example 4, bismuth 50%, lead 25%, tin 12.5%, cadmium 12.5%, melting point 68 degrees.

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PUM

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Abstract

This invention belongs to the machinery processing technology, it relates to the improvement of the bending and machining method of the tubing especially to the thin-wall tubing or the similar thin-wall part. The low-melting alloy in this invention, whose proportion by weight of the component contents is as following: Lead 25- 32%, tin 12- 15%, cadmium 9- 13%, zinc 0- 4%, stibium 0- 5%, bismuth margin. The low-melting alloy can ensure the request of ellipse degree of the pipe after processing, and it can eliminate cockles, corrugation.

Description

technical field [0001] The invention belongs to mechanical processing technology, and relates to the improvement of the bending and machining method of pipes, especially thin-walled pipes or similar thin-walled parts. Background technique [0002] Catheters, especially thin-walled pipes or similar thin-walled parts, are prone to oval deformation, wrinkles, and corrugations when they are bent. When it is machined, such as milling the surface or turning the mouth, it is prone to deformation and gaps. At present, the method of filling the pipe with rosin is generally used to enhance its strength before bending and machining, but the rosin is brittle and fragile due to force during processing, which affects the internal support effect of the pipe, and the crushed rosin at the end of the pipe affects the accuracy of the machine tool, which is very difficult. It is difficult to process qualified parts. Contents of the invention [0003] The purpose of the present invention is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C12/00C22C30/04C22C1/02B21D7/03B23C3/00B23B5/00
Inventor 杨卓勇陈卫刘广新
Owner AECC AVIATION POWER CO LTD
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