Plasma spray head structure for spraying special-shaped workpieces

Abstract

The invention relates to the technical field of plasma spraying equipment, and discloses a plasma spray head structure for spraying special-shaped workpieces. The plasma spray head structure comprises a fixed mounting plate, a plasma spray head is movably connected with the top end of the fixed mounting plate through a sliding rail, a rectangular through groove extending to the bottom of the fixed mounting plate is formed in the middle part of the fixed mounting plate, a fixing block is fixedly mounted in the middle of the bottom end of the plasma spray head, the bottom end of the fixing block extends to the bottom of the fixing mounting plate through the rectangular through groove in the fixing mounting plate, and a pressure sleeve movably sleeves one side of the bottom end of the fixing mounting plate through a fixing support fixedly mounted at the bottom of the fixing mounting plate. According to the plasma spray head structure for the spraying special-shaped workpieces, by arranging structures on a pressure sleeve and a balance sleeve, the relative position relation of a first linkage piston and a second linkage piston in the balance sleeve is changed, so that the state of relatively constant pressure is kept, and therefore, the uniformity and compactness of the plasma coating on the surface of the part are effectively improved.

Description

technical field [0001] The invention relates to the technical field of plasma spraying equipment, in particular to a structure of a plasma spraying head used for spraying special-shaped workpieces. Background technique [0002] The plasma nozzle is a surface strengthening and modification technology that heats the powder material to a molten or semi-molten state and sprays it on the surface of the substrate at high speed. Compared with other spraying technologies, the temperature of the plasma flame and the concentration of the energy beam are relatively high. High, and can melt most of the spray powder materials with high hardness and high melting point, so it can be used to prepare a variety of coating structures, and the substrate is not charged and melted during the spraying process, so that the structure of the substrate surface It will not change, and will not adversely affect the shape and performance of the substrate due to high temperature heating. Therefore, it has...

AI Technical Summary

Problems solved by technology

[0003] However, because the spray material is sprayed onto the surface of the substrate by means of high-speed jet flow, when spraying the surface of some irregular parts, in the process of rotating and moving parts, due to the gap between the surface and the spray head The change of the distance causes the plasma plume to have different degrees of impact on the surface of the substrate due to the change of the jet length, which leads to a large difference in the compactness of the coating between different surfaces of the irregular parts, which seriously affects The performance and life of the component during use

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