Worm type central powder feeding type plasma cladding head

Abstract

The invention discloses a worm type central powder feeding type plasma cladding head. The worm type central powder feeding type plasma cladding head comprises a central powder feeding part, a plasma spraying gun part and a water cooled jacket part, wherein the central powder feeding part is formed by a powder hopper, a powder feeding screw and a control system; the powder feeding screw is arrangedon a center shaft of the central powder feeding part and matched with the inner wall of the hopper, the powder feeding purpose is achieved in a rotating mode, and the powder feeding method belongs toa mechanical powder feeding mode and is a central powder feeding method. The plasma spraying gun part and the water cooled jacket part act together to generate three plasma beams which are gathered at the intersection point of the axes of three plasma spraying guns and the axis of a worm to melt alloy powder and the surface of a metal part. The problems in the prior art are solved, and the powderutilization rate and the cladding quality of plasma cladding are further improved.

Description

technical field [0001] The invention belongs to the technical field of plasma cladding, and in particular relates to a design scheme of a worm screw type central powder feeding type plasma cladding head. Background technique [0002] Plasma cladding refers to a micro-beam plasma arc with high energy density obtained through a specific device. Using the plasma beam, various alloy powders are instantaneously heated and accelerated to form particle rays, which are sprayed onto the surface of the part to be processed. After melting, mixing, Physical and chemical changes such as solidification are finally combined with metallurgy on the surface of the part to realize the process of repairing, strengthening and remanufacturing the surface of the part. This technology can combine two materials with different or very different properties at the atomic level, and the heating and cooling speed is lower than that of laser, and the molten state is maintained for a long time, which is co...

AI Technical Summary

Problems solved by technology

However, when this method is used to feed powder, each powder flow will collide with each other when it converges to the center, and there are differences in the speed of each powder flow when it converges, so the uniformity and aggregation of the powder will be greatly affected during the convergence. impact, thus splashing around, reducing the utilization rate of powder and affecting the quality of cladding

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