Manufacturing method of steel-aluminum composite section bar used for contact rail in urban railway system

Abstract

The invention discloses a manufacturing method of a steel-aluminum composite section bar used for a contact rail in an urban railway system. The manufacturing method comprises the following steps: 1, molding an aluminum section bar substrate through an extrusion process; 2, molding an integrated stainless steel band crude blank through a rolling way; 3, hooking two sides of the stainless steel band crude blank at two sides of the aluminum section bar substrate; and 4, molding and wrapping a stainless steel band arranged on the aluminum section bar substrate through the rolling way and performing high-frequency heating on the molding part of the stainless steel band during the molding process. According to the invention, the integrated stainless steel band is adopted to replace two ''J''-shaped stainless steel band to hook the two sides of the aluminum section bar substrate, so that the contact surface of the contact rail and a current collector is ensured to be smooth, the electro erosion and the electric abrasion during the current collecting process is reduced, and the service lives of the contact rail and the current collector are prolonged.

Description

technical field [0001] The invention relates to a method for manufacturing a steel-aluminum composite profile, in particular to a method for manufacturing a steel-aluminum composite profile for urban rail transit contact rails. Background technique [0002] With the rapid development of rail transit, the steel-aluminum composite contact rail, as a transmission structure developed on the basis of the traditional low-carbon steel contact rail, has gradually replaced the low-carbon steel contact rail as the third rail and improved the third rail. Due to the technical performance of current flow, it has become a trend to use steel-aluminum composite contact rail as the third rail in newly constructed urban rail transit projects. [0003] As an important part of the steel-aluminum composite contact rail, the steel-aluminum composite profile directly affects the construction quality of the third rail of the entire rail transit. [0004] The ideal product structure and quality for...

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Problems solved by technology

[0007] The disadvantages of this manufacturing method are: complex process, low efficiency, and the welding process may cause local deformation of the aluminum profile matrix, making the bonding surface not tight enough; after welding, the plasticity and corrosion resistance are obviously reduced; the two "J" characters The probability of welding defects such as cracks, trachoma, and damage at the weld seam of the stainless steel strip is relatively high; the surface of the contact rail and the receiver is not smooth enough, and the electrical corrosion and electrical wear are relatively high during the power receiving process, which reduces the contact rail. and service life of the receiver

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