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Leakproof welding method of stainless steel pipe and copper fin

A welding method, stainless steel pipe technology, applied in welding equipment, welding/welding/cutting articles, tubular articles, etc., can solve the problems of lack of independence and universality, complicated process, etc.

Inactive Publication Date: 2010-06-16
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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  • Abstract
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  • Claims
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Problems solved by technology

The stainless steel plate and the copper plate can be welded together, and then the stainless steel plate and the stainless steel pipe can be welded, the process is complicated, lacks independence and universality

Method used

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  • Leakproof welding method of stainless steel pipe and copper fin
  • Leakproof welding method of stainless steel pipe and copper fin

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Embodiment Construction

[0021] The welding of copper fins and stainless steel tubes belongs to the welding of dissimilar metals, which is one of the key processes in the manufacture of heat sinks. The schematic diagram of the welding sequence of copper fins and stainless steel tubes is as follows figure 1 shown. The barrel fins are numbered according to the welding sequence, and the copper fins are welded to the stainless steel pipe 7 according to the sequence of the copper fins 1-6. To this end, a series of welding process tests are required. The welding process currently used is the welding process of melting the base material (copper fin). When welding, fold the welded copper fins to a 90° 5mm edge, and use special welding fixtures to fix the copper fins and stainless steel pipes. During the welding process, the welding sequence adopted is: spot welding fixation-segmented intermittent welding-full welding, so as to minimize welding deformation and correct the shape after welding.

[0022] In ord...

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Abstract

The invention relates to a welding method of a heterogenous metal between a stainless steel pipe and a copper fin, which comprises the following steps of: carrying out necessary tests and leak detection for parts to be welded; finishing the welding of the parts by applying a special argon arc welding process; and inspecting according to a corresponding inspection condition to ensure that a product satisfies the use requirement of a space environment simulation test. The method is particularly beneficial to the splice welding of the stainless steel pipe and the red copper fin in a heat sink, and an obtained weld can still keep vacuum tightness under the condition of long-term cool-heat exchange at high and low temperatures.

Description

technical field [0001] The invention relates to a heterogeneous metal welding method between copper fins and stainless steel pipes, belonging to the field of welding technology in mechanical manufacturing. The method involves the welding of the stainless steel tube and the copper plate in the heat sink, which is a key part of the space environment simulation test equipment. Background technique [0002] With the development of combined applications between dissimilar metals, dissimilar metal welding has been widely used. In the development process of space environment simulation test equipment, the welding of copper fins and stainless steel tubes is one of the key processes in the manufacture of heat sinks. In the welding of dissimilar metals, especially when welding copper fins to stainless steel pipes, the commonly used welding techniques have the following disadvantages: [0003] (1) Oxygen-acetylene welding. Strict cleaning is required after welding, the materials use...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/095B23K103/22B23K101/08
Inventor 魏仁海张立伟佟永利张文杰王克文卜京怀李罡
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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