Micro rolling and ultrasonic-assisted laser cladding device

Abstract

The invention relates to a micro rolling and ultrasonic-assisted laser cladding device, in particular to strengthening to the surface of a cladding layer. The device comprises a workbench, a fixed check block, a workpiece, a first mechanical arm, a synchronous powder feeder, a laser device, a micro roller, a rotating device, an amplitude-change pole, a second mechanical arm and an ultrasonic generator. During laser cladding, the micro rolling technology and the ultrasonic technology are used for assistance, and adverse effects left during pure laser scanning can be eliminated to the largest degree by means of the combination. By means of micro rolling, dendritic crystalline lenses generated during cooling of the cladding layer are ground through the micro roller, the crystal structure is refined, and air pores are effectively suppressed. By means of the ultrasonic technology, residual tension generated during temperature decrease of the cladding layer is eliminated, and cracks are effectively reduced. The micro rolling technology and the ultrasonic technology are applied to the laser cladding layer, and compactness, isotropy and other properties of the cladding layer are further improved.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a micro-rolling and ultrasonic-assisted laser cladding device. Background technique [0002] With the development of economy and the advancement of science and technology, people urgently need higher performance and higher quality equipment, which requires the parts themselves to have better strength, stiffness and stability, and the surface of the parts to have better wear resistance and oxidation resistance. performance and resistance to shock loads. Common preparation methods to increase the surface properties of parts include laser cladding, induction cladding, electroplating, etc., and the cladding process has the advantages of thick coating, easy formation of metallurgical bonding, and high coating performance. However, the cladding layer prepared by a single method has many defects, so it is a good idea to use multiple methods to make up for the de...

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Problems solved by technology

However, the cladding layer prepared by a single method has many defects, so it is a good idea to use multiple methods to make up for the defects.

At present, a large number of studies have shown that the method of ultrasonic vibration composite laser cladding, only introducing ultrasonic vibration, although it can reduce residual stress, reduce pores and crack defects, but the density of the cladding layer has not improved; some studies use micro-rolling Process composite laser cladding, although it can improve the density of the cladding, but this process will add new residual stress to the cladding layer

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