Process for manufacturing steel-aluminum composite conductor rail

Abstract

The invention relates to a process for manufacturing a steel-aluminum composite conductor rail, which has the following technical characteristics: processing stainless strips into hook-type stainless strips with 180 degrees of radians at bending ends by a special numerical control gradient cold-rolling cold-bending unit; covering the two hook-type stainless strips on the upper surface and two sides of the upper end of an I-shaped aluminum rail base, and embedding the bending ends of the two hook-type stainless strips in grooves on two sides of the upper end of the I-shaped aluminum rail base;welding interfaces of the two hook-type stainless strips covered on the I-shaped aluminum rail base and performing double-pressing to the I-shaped aluminum rail base covered by the hook-type stainlessstrips by a special extrusion device at the same time; and performing mark milling and polishing treatments to the upper surface of the welded conductor rail to obtain a finished product. By adoptingthe ways of the scientific welding process and the automation treatment, the invention ensures the tight compound of the hook-type stainless strips and the aluminum rail base, thereby improving the welding performance, reducing the cost and improving the electric conduction performance, the weather-proof performance and the corrosion protection performance.

Description

technical field [0001] The invention relates to a manufacturing method of a composite conductive rail, in particular to a manufacturing process of a steel-aluminum composite conductive rail. Background technique [0002] Steel-aluminum composite conductor rail has become the leading direction of urban rail development due to its good conductivity, high safety factor, low maintenance cost, long power supply distance, and convenient installation, and has very important practical significance and economic value. The existing steel-aluminum composite conductor rail mainly has two structures: 1. The U-shaped stainless steel strip is embedded into the two grooves provided on the aluminum rail base by riveting, and the stainless steel strip and the aluminum rail base are riveted together by rivets. Together, there are two problems with this riveted steel-aluminum composite conductor rail: on the one hand, there is the problem of complex manufacturing process, and on the other hand,...

AI Technical Summary

Problems solved by technology

The existing steel-aluminum composite conductor rail mainly has two structures: 1. The U-shaped stainless steel strip is embedded into the two grooves provided on the aluminum rail base by riveting, and the stainless steel strip and the aluminum rail base are riveted together by rivets. Together, there are two problems with this riveted steel-aluminum composite conductor rail: on the one hand, there is the problem of complex manufacturing process, and on the other hand, there is the problem of poor composite effect, which affects the consistency of steel-aluminum composite, resulting in its normal utilization rate 2. The stainless steel strip is covered on the aluminum rail base by welding and the stainless steel strip is welded. This welded steel-aluminum composite conductor rail solves the problem of composite consistency to a certain extent, but still There are the following problems: (1). The manufacturing process is backward. When welding the hook type (ie J type) steel strip, it is usually welded under normal pressure, which makes the lattice at the weld joint loose, resulting in wear resistance, high temperature resistance, etc. Poor performance and stress concentration problems, therefore, the composite conductive rail is easily damaged under high-speed friction and high temperature conditions; (2). When manufacturing hook-shaped stainless steel strips, it is necessary to process stainless steel strips with a certain wall thickness into curved For the hook-shaped stainless steel strip with an end radian of 180°, due to the large radius of curvature of the hook-shaped stainless steel strip, the existing manufacturing process has the problem of large consumables, which increases the manufacturing cost

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