Preparation method of automobile bend 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. Long life, combined with good results

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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  • Preparation method of automobile bend pipe
  • Preparation method of automobile bend pipe
  • Preparation method of automobile bend pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Selection of raw materials

[0035] The raw materials are high-purity lead, cadmium, bismuth, and tin metals, and the implementation standards of material composition are as follows.

[0036] Bismuth composition executive standard: GB / T 915-2001

[0037]

[0038] Tin composition executive standard: GT / T 728-1998

[0039]

[0040] Executive standard for lead composition: GB / T 469-2005

[0041]

[0042] Cadmium composition executive standard: YS / T 72-2005

[0043]

[0044] 2. The method for preparing the automobile elbow in this embodiment is as follows:

[0045] (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.

[0046] (2) Turn on the melting furnace, and set the temperature in the furnace to 620°C.

[0047] (3) Pour lead i...

Embodiment 2

[0055] The selection of raw material is with embodiment 1.

[0056] The preparation method of the present embodiment automobile bend pipe is as follows:

[0057](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.

[0058] (2) Turn on the melting furnace, and set the temperature in the furnace to 600°C.

[0059] (3) Pour lead into the crucible in the smelting furnace first, then pour other components, stir evenly, and carry out smelting.

[0060] (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.

[0061] (5) Start...

Embodiment 3

[0067] The selection of raw material is with embodiment 1.

[0068] The preparation method of the present embodiment automobile bend pipe is as follows:

[0069] (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.

[0070] (2) Turn on the melting furnace, and set the temperature in the furnace to 630°C.

[0071] (3) Pour lead into the crucible in the smelting furnace first, then pour other components, stir evenly, and carry out smelting.

[0072] (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.

[0073] (5) Star...

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Abstract

The present invention provides a vehicle bending pipe preparation method, which comprises: weighing the following components: 10-30% of bismuth, 40-50% of lead, 20-25% of tin, and 10-15% of cadmium; smelting with a smelting furnace, and setting a temperature at 600-650 DEG C; adding the raw materials, and introducing argon when heating is performed to achieve a temperature of 290-310 DEG C; timing when the temperature is 350-370 DEG C, heating for 10-18 min, taking out, stirring, heating for 10-16 min, taking out, stirring, and carrying out thermal insulation for 20-25 min; naturally cooking to form a solid alloy; placing the solid alloy into a water bath with a temperature of 90-100 DEG C, and melting into a liquid; taking a straight pipe, placing in a water bath with a temperature of 30-35 DEG C, injecting the liquid alloy into the straight pipe, and cooling in the water bath; and placing into a bending pipe mold, and carrying out oil pressure molding. According to the present invention, the low temperature alloy material is injected into the stainless steel pipe, such that the obtained vehicle bending pipe cannot produce 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): B21D7/00C22C30/04B22C9/24B21D9/05
Inventor 吴江葛干辉毛松杰
Owner NINGBO SIMING AUTOMOBILE TECH
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