Manufacture method of tunnel cantilever base capable of improving anti-fatigue performance

Abstract

The invention relates to the field of support devices for overhead contact systems on railway lines, and aims to provide a manufacture method of a tunnel cantilever base capable of improving anti-fatigue performance. According to the technical solution, the tunnel cantilever base comprises a base, an adjustment base and a rotating shaft. At least one of the base, the adjustment base and the rotating shaft is processed according to the following steps: (S1) shearing blanking and removing rust; (S2) heating a blank part; (S3) performing hot forging; (S4) performing ultrasonic flaw detection; (S5) performing cold pressing and bending of a plate obtained after the processing of the step 4, and folding two sides of the plate to form a groove; (S6) performing normalizing; (S7) sequentially performing rough processing and semifinishing of obtained parts; (S8) carburizing the parts processed according to the step 7, then quenching, and performing low temperature tempering; (S9) performing chromium plating; (S10) performing finishing again and adjusting the size. The cantilever base after being processed according to the manufacture method has good wear resistance and high fatigue resistance.

Description

technical field [0001] The invention relates to the field of catenary support devices for railway lines, in particular to a method for manufacturing a tunnel arm base that improves fatigue resistance. Background technique [0002] The wrist-arm base plays an important role in the electrified railway catenary, especially in the contemporary era of rapid development of high-speed rail, new requirements are put forward for the fatigue resistance of the wrist-arm base to ensure the normal operation of the railway network; the single-track tunnel wrist Arm base, due to the large clearance in the tunnel, the arm base needs to be adjustable during installation, and the insulating string on the arm is installed at a certain angle with the tunnel wall through the ears, which increases the force of the arm base . [0003] The existing arm bases for tunnels are basically hinged with angle steel and channel steel, and adjusted by the bolts hinged on the other side, while the existing a...

AI Technical Summary

Problems solved by technology

[0003] The existing arm bases for tunnels are basically hinged with angle steel and channel steel, and adjusted by the bolts hinged on the other side, while the existing angle steel and channel steel are basically rolled with Q235 steel, and the surface is plated after the rough processing is completed. Zinc treatment; although it is simple and easy to implement and low in production cost, the tensile strength of the entire wrist arm base is low, low in fatigue resistance, and insufficient in wear resistance; the galvanized layer of the rotating pair is not hard enough, and it is easy to fall off, so that the joints It loses the anti-rust performance, reduces the tensile strength of the single ear, poses a safety hazard, and increases the friction at the hinge, which makes it inconvenient to adjust and maintain the wrist arm in the tunnel.

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