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Low-frequency and low-power laser welding method for oxygen-free copper

A technology of laser welding and oxygen-free copper, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of graphite coating affecting welding strength, uneven coating of graphite coating, etc., and achieve smooth weld joints Good looking and comprehensive performance

Pending Publication Date: 2021-01-15
中国船舶集团有限公司第七二四研究所
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Problems solved by technology

[0005] The purpose of the present invention is to: provide the application and welding method of laser welding in oxygen-free copper welding, to solve the common low-frequency low-power laser welding equipment welding oxygen-free copper, existing graphite coating uneven coating and graphite coating penetration welding The problem that the seam affects the welding strength

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  • Low-frequency and low-power laser welding method for oxygen-free copper
  • Low-frequency and low-power laser welding method for oxygen-free copper
  • Low-frequency and low-power laser welding method for oxygen-free copper

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Embodiment Construction

[0019]In order to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments. The size of the oxygen-free copper cavity in this embodiment is 21mm×20mm×4mm, and the cover thickness is 0.5mm. The laser welding equipment preferably has a power of 300W and a frequency of 10Hz, and the sealing and welding meets the requirements of GJB air tightness.

[0020]Before coating the light-absorbing layer material at the welding seam of the oxygen-free copper cavity, use n-bromopropane and anhydrous ethanol to wipe the welded area in order to remove oxides, organics, pollutants, etc. indicated by oxygen-free copper;

[0021]When coating the light-absorbing layer material on the welding seam of the oxygen-free copper cavity, use a brush to uniformly coat the light-absorbing layer material on the portion to be welded of the oxygen-f...

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Abstract

The invention discloses a low-frequency and low-power laser welding method for oxygen-free copper, and belongs to the technical field of welding. The method comprises the technological processes of cleaning, coating, drying, welding recleaning and the like. According to the method, the oxygen-free copper welding problem of low-frequency and low-power laser equipment is solved, the welding processis safe and reliable, the conditions of uniform coating of a graphite coating and welded joint penetration before and after welding are well controlled, and welded joints are flat, attractive and goodin comprehensive performance.

Description

Technical field[0001]The invention relates to a welding method and belongs to the technical field of welding.Background technique[0002]Oxygen-free copper has the advantages of excellent electrical conductivity, corrosion resistance and processing performance. It is widely used in electrical appliances, machinery, vehicles, shipbuilding and civil appliances, and is indispensable for modern industry, agriculture, national defense, and science and technology. metal. For a long time, the commonly used welding methods for oxygen-free copper include brazing, gas welding, arc welding, TIG (Tungsten Inert GasWelding, non-melting inert gas tungsten protection welding) welding, etc. These welding methods often have pre-existing heat due to insufficient heat concentration. The problem of higher heat temperature; with the development of welding technology, high-energy heat sources such as electron beam and laser welding have been used for oxygen-free copper welding, and have achieved certain re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/60
CPCB23K26/21B23K26/60
Inventor 聂要要杨帆王亚松邝小乐许红祥
Owner 中国船舶集团有限公司第七二四研究所
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