Laser cladding powder feeder

Abstract

The invention discloses a laser cladding powder feeder. The laser cladding powder feeder comprises a powder cylinder, a base portion, a cover plate, a rotating disc, a powder suction pipe and a rotating disc motor. Relatively accurate powder feeding operation can be achieved by a relatively simplified structure on the basis of the laser cladding powder feeder.

Description

technical field [0001] The invention relates to a laser cladding powder feeder. Background technique [0002] The laser cladding process refers to a surface treatment process in which the cladding material is pre-coated on the surface of the substrate, and then the pre-coated cladding material and the surface material of the substrate are melted by a laser beam. At present, the laser cladding process has become one of the important technologies for preparing coatings. [0003] The main problem in the current laser cladding process is that the fluidity of the fine powder is poor, and the powder barrel usually has a cylindrical part and a tapered part located at the lower end of the cylindrical part. During the feeding process, the descending material gradually changes due to the cross-sectional diameter Small, the support force between powder particles becomes larger, there may be suspension, when the suspension becomes larger, it may collapse, so repeated, resulting in unev...

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Problems solved by technology

[0003] The main problem in the current laser cladding process is that the fluidity of the fine powder is poor, and the powder barrel usually has a cylindrical part and a tapered part located at the lower end of the cylindrical part. During the feeding process, the descending material gradually changes due to the cross-sectional diameter Small, the supporting force between the powder particles becomes larger, there may be suspension, when the suspension becomes larger, it may collapse, so repeated, resulting in uneven direct feeding of the powder cylinder

[0004] Chinese patent document CN208532933U discloses a laser cladding powder feeder. In order to ensure the uniformity of powder feeding, an air inlet is provided on the powder storage tank, in order to make the powder feeding speed stable and reliable through positive pressure powder feeding. However, when there is a lot of powder in the powder storage tank, the compressed gas introduced through the air inlet is not enough to affect the discharge stability of the bottom powder, but only provides a relatively high discharge pressure

[0005] Chinese patent document CN208560678U discloses a powder feeder with a heating resistor inside the powder feeder body, which tries to dry the powder by heating the powder, so as to solve the problems of powder blockage and uneven feeding

Heating powder is a better technical direction to solve powder congestion. However, since powder is not a fluid, it will not generate heat convection like a fluid. Although the thermal conductivity of metal powder itself is relatively good, the uniformity of heating is still relatively high. poor

In addition, the post-drying cannot disperse the previously generated clusters, and heating can only solve the problem of new clusters generated during the powder feeding process

[0006] The powder feeder disclosed in the Chinese patent document CN109468582A reduces the generation of powder congestion by installing a vibrator on the support of the powder feeder, but the vibration will inevitably increase the vibration of the powder feeder and affect the accuracy of spraying

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