Gas circulation device for laser cladding and method thereof

Abstract

The invention discloses a gas circulation device for laser cladding, and relates to the field of laser cladding. The gas circulation device comprises a laser room and a laser cladding mechanism and a workpiece positioning mechanism arranged in the laser room, wherein an inert gas conveying device used for conveying inert gas to a position of the laser cladding mechanism in the laser room is arranged outside the laser room; an exhaust port of a heat exchanger at the top of the laser room communicates with a gas circulating device through a pipeline; and the gas circulating device is used for guiding gas from a lower portion in the laser room. According to the invention, it is guaranteed that laser cladding work is in an inert protective atmosphere, parts are prevented from making contact with air in a forming process and being seriously oxidized, and the machining efficiency of the parts is improved; and then the gas circulating device is started, smoke and other gas generated in a cladding process are blown upwards, a waste heat recovery function is achieved through the heat exchanger, and the gas and heat generated in the cladding process are discharged in time.

Description

technical field [0001] The invention relates to the field of laser cladding, in particular to a gas circulation device for laser cladding and a method thereof. Background technique [0002] With the development of industrial technology, laser cladding technology has been more and more widely used. Laser cladding is to add cladding materials on the surface of the substrate, and use high-energy-density laser to melt and solidify the powder and form a metallurgical process with the surface of the substrate. The combined cladding layer greatly improves the hardness, wear resistance and corrosion resistance of the surface of the parts. [0003] During laser cladding work, in order to avoid serious oxidation of components in contact with air during the forming process and affect the quality of components, an inert gas protection system needs to be installed, and the direct discharge of smoke and other gases generated during the laser cladding process is likely to cause pollution. ...

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Problems solved by technology

[0003] During laser cladding work, in order to avoid serious oxidation of components in contact with air during the forming process and affect the quality of components, an inert gas protection system needs to be installed, and the direct discharge of smoke and other gases generated during the laser cladding process is likely to cause pollution. And the heat contained in the smoke and other gases is discharged in vain, which causes a waste of resources to a certain extent.

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