Fixture and method for partial coating of small parts

Abstract

The invention provides a clamp for local coating of a thin and small part. The thin and small part is in a shape of a bottom box lack of edges, and required coatings are obtained from the local inner sides of three edges. The clamp comprises a base plate, a fixing press piece, a bottom limiting plate and an upper cover. The upper cover comprises a main plate and an E-shaped limiting plate. The main plate is provided with multiple through holes, and a partition strip is arranged between every two adjacent through holes. The E-shaped limiting plate is provided with multiple zigzag convex strips, and every two adjacent convex strips form a U-shaped area. Each convex strip is downward provided with the blocking face in the U-shaped area. The E-shaped limiting plate is fixed above the main plate. The bottom limiting plate is provided with a base, and an outward-protruding tongue plate is arranged on the base. The fixing press piece is fixed above the base plate. The tongue plate is arranged on the inner bottom face of the thin and small part, the blocking face is in butt joint with the inner wall face of the thin and small part, the main plate, the base plate, the fixing press piece and the bottom limiting plate are respectively provided with at least two positioning holes, and fixing parts respectively penetrates the positioning holes to be positioned. The clamp is simple and convenient to assemble, simple in operation and capable of improving the production efficiency.

Description

technical field [0001] The invention relates to coating technology, in particular to a fixture and method for partial coating of small parts. Background technique [0002] Coating is a kind of surface modification technology, which is divided into ordinary coating and special coating, including insulating coating, conductive coating, wear-resistant coating, matting coating, lubricating coating, anti-corrosion coating...etc. etc. Coating technology has been widely used in various industries such as automobiles, aviation, petrochemicals, and communications. [0003] For small parts, it is necessary to apply an insulating coating locally. Due to the small size of the parts and the strict requirements on the thickness, position and performance of the coating, the coating is very difficult. Usually, parts are painted before forming, such as repeated silk screen printing method or flat plate masking method. This kind of coating method has a relatively simple process, and the pai...

AI Technical Summary

Problems solved by technology

Due to the small size of the parts and strict requirements on the thickness, position and performance of the coating, it is very difficult to paint

Usually, parts are painted before forming, such as repeated silk screen printing method or flat plate masking method. This kind of coating method is relatively simple, and the paint film will be damaged during the forming process.

The coating after the parts are formed is usually wrapped and masked, but because it is a partial coating, the coating is easily damaged when the mask is removed, and the dimensional accuracy of the coating position cannot be effectively guaranteed, which seriously affects the product quality

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