Hard-surface build-up welding strain roller and manufacture method thereof

Abstract

The invention relates to a hard-surface bead welding stretching roller and a production method thereof. The stretching roller comprises a drum and round side covers which are fixedly and closely covered at the openings of the two ends of the drum; the centers of the two side covers are in coupling connection with a left shaft head and a right shaft head respectively; the outer surface of the drum is covered with a spraying layer; the external sides of the two side covers are provided with sockets which stretch from the middle of the side covers to the edge; the external sides of the two sides covers are provided with chamfer angles in a surrounding way; the two side covers are welded with the inner walls at the two ends of the drum by the chamfer angles and the sockets; the spraying layer uses a functional metal ceramic coat which is composed of composite metal ceramic formed by WC / Co metal ceramics and metal or alloy. The roller solves the technical problems that as the external surface of the existing product roller surface is sprayed with hard plating, in the process of use, the coat is easy to produce pits or bumps owing to the press of sundries such as iron oxide, etc., and drawing stamps or stains are formed on the surface of finished product, strip steel, therefore, the surface quality of the strip steel is influenced; simultaneously, the technical problem that in the process of use, heat is easy to enter the inner side of the drum from the joint between the drum and the close cover is solved, therefore, the solution of the problems is beneficial to the longer service life of the stretching roller.

Description

technical field [0001] The invention relates to a tension roll used in a cold rolling production line, in particular to a hard surface surfacing tension roll and a manufacturing method thereof. Background technique [0002] With the commissioning of Baosteel's Baori Automobile Sheet Cold Rolling Production Line, high-end, high-value-added automotive sheets have been widely used in car manufacturers such as Shanghai Volkswagen, Shanghai GM, FAW-Volkswagen, and BMW Brilliance. More and more steel manufacturers in China The company will use Baosteel Baori Automobile Sheet Cold Rolling Production Line as a template to establish a high-end cold-rolling production line. For example, Baosteel No. 5 cold-rolled CAPL and CGL production lines are the most advanced cold-rolling production lines at home and abroad, mainly producing high-end automotive sheets. The quality requirements of the strip surface are getting higher and higher, and the speed of the strip is getting higher and hig...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a hard surface welding tension roller and its manufacturing method, which mainly solves the problem of spraying hard chrome plating on the outer surface of the existing product roller surface, In the process of use, it is easy to be pressed into pits or protrusions by iron oxide and other sundries, forming pull marks or imprints on the surface of the finished strip steel, which affects the technical problems of the surface quality of the strip steel, and at the same time solves the problem that the heat is easily released from the roller and the cover during use. The technical problem of the joint entering the roller, which is conducive to the long-term use of the tension roller

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