A kind of preparation method of automobile bent pipe

A technology for pipe bends and automobiles, which is applied in the field of preparation of automobile bends, can solve the problems of poor bending performance, strength and brittleness of automobile bends, prone to cracking and damage, etc., and achieves large bending deformation and deformation. Small, well combined effect

Active Publication Date: 2019-09-10
NINGBO SIMING AUTOMOBILE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bending performance of the automobile elbow made of this material is not good, and it is easy to break after being bent at 45-90 degrees, and under the action of external force (such as stretching, impact, etc.), it is easy to crack and break with only a small deformation. Both strength and brittleness need to be improved

Method used

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  • A kind of preparation method of automobile bent pipe
  • A kind of preparation method of automobile bent pipe
  • A kind of preparation method of automobile bent pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Selection of raw materials

[0038] The raw materials are high-purity lead, cadmium, bismuth, and tin metals, and the implementation standards of material composition are as follows.

[0039] Bismuth composition executive standard: GB / T915-2001

[0040]

[0041] Tin composition executive standard: GT / T728-1998

[0042]

[0043] Executive standard for lead composition: GB / T469-2005

[0044]

[0045] Cadmium composition executive standard: YS / T72-2005

[0046]

[0047] 2. The method for preparing the automobile elbow in this embodiment is as follows:

[0048] (1) quickly weigh each component of the following weight percentages: bismuth (Bi) 26%, lead (Pb) 40%, tin (Sn) 21%, cadmium (Cd) 13%, should minimize air and The contact time of raw materials is to avoid oxidation, and the raw materials are stored in sealed tanks for later use.

[0049] (2) Turn on the melting furnace, and set the temperature in the furnace to 620°C.

[0050] (3) Pour lead into ...

Embodiment 2

[0057] The selection of raw material is with embodiment 1.

[0058] The preparation method of the present embodiment automobile bend pipe is as follows:

[0059] (1) quickly weigh each component of the following weight percentages: bismuth (Bi) 10%, lead (Pb) 50%, tin (Sn) 25%, cadmium (Cd) 15%, or bismuth (Bi) 10%, Lead (Pb) 50%, tin (Sn) 24%, cadmium (Cd) 15%, copper (Cu) 0.5%, aluminum (Al) 0.5%, during operation, the contact time between air and raw materials should be minimized to avoid oxidation, The raw materials are stored in airtight jars for later use.

[0060] (2) Turn on the melting furnace, and set the temperature in the furnace to 600°C.

[0061] (3) Pour lead into the crucible in the smelting furnace first, then pour other components, stir evenly, and carry out smelting.

[0062] (4) When the temperature of the melting furnace rises to about 300°C, argon is introduced into the melting furnace so that the gas in the melting furnace is argon.

[0063] (5) Star...

Embodiment 3

[0068] The selection of raw material is with embodiment 1.

[0069] The preparation method of the present embodiment automobile bend pipe is as follows:

[0070] (1) quickly weigh each component of the following weight percentages: bismuth (Bi) 20%, lead (Pb) 45%, tin (Sn) 24%, cadmium (Cd) 11%, or bismuth (Bi) 20%, Lead (Pb) 45%, tin (Sn) 23%, cadmium (Cd) 11%, copper (Cu) 0.5%, aluminum (Al) 0.5%, during operation, the contact time between air and raw materials should be minimized to avoid oxidation, The raw materials are stored in airtight jars for later use.

[0071] (2) Turn on the melting furnace, and set the temperature in the furnace to 630°C.

[0072] (3) Pour lead into the crucible in the smelting furnace first, then pour other components, stir evenly, and carry out smelting.

[0073] (4) When the temperature of the melting furnace rises to about 300°C, argon is introduced into the melting furnace so that the gas in the melting furnace is argon.

[0074] (5) Star...

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Abstract

The invention provides a manufacturing method of an automobile elbow. The manufacturing method of the automobile elbow comprises the following steps that the following components comprising 10%-30% of bismuth, 40%-50% of lead, 20%-25% of tin and 10%-15% of cadmium are obtained through weighing; a smelting furnace is used for smelting, and the temperature is set to be 600-650 DEG C; raw materials are fed, and after the temperature is raised to 290-310 DEG C, argon is fed; when the temperature reaches 350-370 DEG C, timing is conducted, heating is conducted for 10-18 min, a crucible is taken out, stirring is conducted, the crucible is heated again for 10-16 min, the crucible is taken out again, stirring is conducted again, and the temperature is kept for 20-25 min; molten alloy is naturally cooled to solid alloy; melting and straight tube filling are conducted in water bath, wherein the temperature of the smelting water bath is 90-100 DEG C, and the temperature of the filling water bath is 30-35 DEG C; and after filling is completed, the low-temperature alloy tube is placed in a tube bending mold for oil pressing forming. According to the manufacturing method of the automobile elbow, the low-temperature alloy material is poured into a stainless steel tube, and the obtained automobile elbow is free from wrinkling, thinning and cracking.

Description

technical field [0001] The invention relates to the technical field of auto parts preparation, in particular to a method for preparing an auto bent pipe. Background technique [0002] Automobile bending pipes (special-shaped pipe fittings) are important parts of automobiles. At present, the alloy materials used in automobile bending pipes are generally iron metal or aluminum alloy. The bending performance of the automobile elbow made of this material is not good, and it is easy to break after being bent at 45-90 degrees, and under the action of external force (such as stretching, impact, etc.), it is easy to crack and break with only a small deformation. Both strength and brittleness need to be improved. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above prior art problems, and provide a method for preparing an automobile elbow. It will be thinner and less prone to cracking, and can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D7/00C22C1/02C22C11/06C22C30/04C22C30/02
Inventor 吴江葛干辉毛松杰
Owner NINGBO SIMING AUTOMOBILE TECH
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