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Stainless steel miniature pipe welding process

A welding process and micro-tube technology, which is applied in stainless steel tube welding and stainless steel micro-tube welding fields, can solve the problems that the service life of the connection joint is lower than that of the base metal body, the tensile strength, plasticity and toughness are poor, and the labor intensity is high. Reduce connection cost and labor intensity, good plasticity and toughness, fast welding speed

Active Publication Date: 2021-10-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above problems, the present invention provides a welding process for stainless steel microtubes, which is used to solve the problems of poor tensile strength, plasticity and toughness, high welding cost and high labor intensity in the welding of stainless steel microtubes in the prior art. The problem that the service life of the joint is much lower than that of the base metal body

Method used

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  • Stainless steel miniature pipe welding process
  • Stainless steel miniature pipe welding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1-2 Described, a stainless steel microtube 7 welding process, comprises the following steps:

[0034] Step S1: fixing the stainless steel micro-tube 7, respectively fixing the two stainless steel micro-tubes 7 to be welded on the welding equipment, which is convenient for assembly, adjustment, welding and grinding;

[0035] Step S2: Assembling the stainless steel microtubes 7 so that the two stainless steel microtubes 7 to be welded are located on the same straight line;

[0036] Step S3: adjust the interface, adjust the interface of the stainless steel microtube 7 to be welded to ensure that there is no misalignment, and the gap is within the expansion coefficient of the stainless steel microtube 7;

[0037] Step S4: igniting the miniature welding torch 8, igniting the miniature welding torch 8 and adjusting the flame so that the flame of the miniature welding torch 8 is a neutral flame, and testing the flame core temperature of the miniature welding t...

Embodiment 2

[0047] Such as Figure 1-2 , on the basis of above-mentioned embodiment 1 common welding equipment, a kind of stainless steel microtube 7 welding process comprises the following steps:

[0048] Step S1: fixing the stainless steel micro-tube 7, respectively fixing the two stainless steel micro-tubes 7 to be welded on the welding equipment, which is convenient for assembly, adjustment, welding and grinding;

[0049] Step S2: Assembling the stainless steel microtubes 7 so that the two stainless steel microtubes 7 to be welded are located on the same straight line;

[0050] Step S3: adjust the interface, adjust the interface of the stainless steel microtube 7 to be welded to ensure that there is no misalignment, and the gap is within the expansion coefficient of the stainless steel microtube 7;

[0051] Step S4: igniting the miniature welding torch 8, igniting the miniature welding torch 8 and adjusting the flame so that the flame of the miniature welding torch 8 is a neutral flame...

Embodiment 3

[0060] Such as Figure 1-2 , on the basis of above-mentioned embodiment 1 common welding equipment, a kind of stainless steel microtube 7 welding process comprises the following steps:

[0061] Step S1: fixing the stainless steel micro-tube 7, respectively fixing the two stainless steel micro-tubes 7 to be welded on the welding equipment, which is convenient for assembly, adjustment, welding and grinding;

[0062] Step S2: Assembling the stainless steel microtubes 7 so that the two stainless steel microtubes 7 to be welded are located on the same straight line;

[0063] Step S3: adjust the interface, adjust the interface of the stainless steel microtube 7 to be welded to ensure that there is no misalignment, and the gap is within the expansion coefficient of the stainless steel microtube 7;

[0064] Step S4: ignite the miniature welding torch 8, ignite the miniature welding torch 8 and adjust the flame so that the flame of the miniature welding torch 8 is a neutral flame, and...

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Abstract

The invention relates to the technical field of miniature pipe welding, in particular to a stainless steel miniature pipe welding process which is used for solving the problems of poor tensile strength, plasticity and toughness, high welding cost and high labor intensity in welding of stainless steel miniature pipes in the prior art. The stainless steel miniature pipe welding process comprises the following steps that S1, stainless steel miniature pipe fixing, S2, stainless steel miniature pipe assembling, S3, connector adjusting, S4, miniature welding gun igniting, S5, cleaning, S6, stainless steel miniature pipe preheating, S7, judging of the temperature of the stainless steel miniature pipe, S8, copper nanowire melting, S9, copper nanowire molten drop spreading, S10, adjusting, and S11, inspecting. The stainless steel miniature pipe welded through the stainless steel miniature pipe welding process has better connecting quality, tensile strength, plasticity and toughness, meanwhile, the connecting cost and labor intensity are effectively reduced, and the service life of a connecting joint of the stainless steel miniature pipe is guaranteed.

Description

technical field [0001] The invention relates to the technical field of stainless steel tube welding, in particular to the technical field of stainless steel micro tube welding, and more specifically relates to a stainless steel micro tube welding process. Background technique [0002] The material is a stainless steel microtube with a diameter of less than 0.2mm and a thickness of less than 0.2mm. This kind of microtube, which is as small as a needle, generally appears in the key parts of precision equipment such as instruments, instruments, and air conditioners. Expansion joints and other connection methods are difficult to achieve permanent complete bonding and complete sealing. The commonly used hot-melt welding process is even more difficult to complete, mainly because the workpiece is too small and requires very little heat, and the heat dissipation is slow and the temperature rises very quickly. It is not easy to control, and it is easy to cause collapse, welding bumps...

Claims

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Application Information

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IPC IPC(8): B23K5/00B23K5/213B23K37/053
CPCB23K5/006B23K5/213B23K37/053
Inventor 杨永磊陈俊李玲徐海涛杨旭杜亮帅宇陈军舰谢文奋刘永华陈文忠付伟
Owner PETROCHINA CO LTD
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