A kind of automatic coating unit and method of elastic body structure functional coating

Abstract

The invention belongs to the technical field of surface engineering and in particular relates to an automatic coating unit and method for a functional coating of a projectile body structure. The coating unit is used for spraying a coating to the outer surface of a sprayed workpiece which is a rotary body. The unit can achieve continuous coating of various functional coatings on the outer walls ofthe plurality of thin-walled rotary body workpieces in a spray room with a definite area, so that the coating capacity is improved. Non-contact measurement of thickness of a humid film state of the coating is achieved, and the curing waiting time of the coating in the spray room is shortened. The thickness of the coating is precisely controlled, so that the coating is prevented from being polished.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to an automatic coating unit and method for functional coatings on elastic body structures. The workpiece used for spraying by the coating unit is a rotary body, which is sprayed on the outer surface of the rotary body. Background technique [0002] Special functional coatings have the characteristics of strong designability, convenient construction, and easy multi-functional compatibility. Without changing the structural materials, they can endow the overall structure with multiple functions such as heat protection, stealth, anti-corrosion, and high-energy laser resistance. It is a weapon Key technologies for high-performance equipment. A large number of functional coatings are used in the body parts of the new generation of strategic and tactical weapons in my country. [0003] However, due to the characteristics of special functional coatings and environm...

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Problems solved by technology

[0005] (2) The curing period of the coating is long, and the spraying workpiece occupies the spraying station for a long time, which affects the utilization rate of the spray booth

Most of the coatings involved are silicone rubber systems, and the drying time of the coating is more than 48 hours. Due to the manual handling, in order to prevent the coating from being damaged during the handling process, the manual handling can only be carried out after 24 hours of spraying. The workpiece occupies the spraying station for a long time, resulting in waste of resources

[0006] (3) Fine control and testing of coating thickness need to be improved urgently, there are phenomena of over-spraying and grinding, less spraying and re-spraying

Functional coating thickness control is the key to coating. At present, coating thickness testing mainly adopts various methods such as mechanical thickness measurement, needle thickness measurement, and eddy current thickness measurement (metal substrate). It has a certain strength, but the coating cannot reach the required strength in a short time after spraying, so the thickness of the coating cannot be detected in time, so the thickness control of the coating mainly depends on the coating process and experience, but the thickness of the coating is affected by various factors at the same time. Factors such as the viscosity of the paint itself, various spraying parameters, and the influence of different spraying operators make it difficult to achieve the thickness required by the process document at one time, resulting in repeated work problems such as overspraying, grinding, and less spraying.

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