Local inert gas protection device for laser deposition repair of metal parts

Abstract

The invention relates to a gas protection device, and in particular relates to a local inert gas protection device for the laser deposition repair of metal parts, belonging to the technical field of laser processing. The local inert gas protection device is compact in structure and stable in performances, can meet the space requirement of test installation, and is low in design and manufacture costs, simple and practical; a stand column of a movement executing mechanism at the upper end of a coaxial powder feeding nozzle is connected with the to-be-repaired part of a titanium alloy part by a soft seal cover. Therefore, a locally sealed flexible atmosphere protection chamber is formed between the part and the stand column, and an inert gas inlet, an inert gas outlet and interfaces of various gas sensors are reserved in the soft seal cover, so that the contents of all gases in the sealed atmosphere chamber can be conveniently detected, the whole titanium alloy part can be repaired in the presence of the purer inert gas, and a better laser repair effect can be further achieved.

Description

technical field [0001] The invention relates to a gas protection device, in particular to a local inert gas protection device for laser deposition repair of metal parts, which belongs to the technical field of laser processing. Background technique [0002] Titanium alloy has the characteristics of high specific strength, good corrosion resistance, high heat resistance and good biological activity. In recent years, it has been widely used in aviation, aerospace, navigation, automobile, metallurgy, chemical industry, medicine and other fields. However, the characteristics of high melting point, high melting state activity and large deformation resistance of titanium alloy itself make the cost of titanium alloy from raw material to preparation and forming greatly increased. In addition, certain mistakes will inevitably occur during the processing of parts, resulting in the scrapping of semi-finished parts or near-final parts. Moreover, the harsh service environment of parts w...

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Problems solved by technology

However, using the atmosphere protection environment obtained by the above method not only requires a large investment in the design and manufacture of the equipment in the early stage, but also requires repeated vacuuming and inert gas filling during the use of the equipment to achieve the purpose of reducing the content of oxygen, nitrogen and water.

However, this method does not have a high utilization rate of inert gas, and the working time is long, which reduces the efficiency of laser repair

At the same time, the size of the airtight atmosphere protection box limits the size range of the repairable parts, so this method cannot adapt to the characteristics of the wide range of repair parts size, thereby reducing the utilization rate of equipment and increasing production costs

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