Method for machining and repairing surface of hydraulic rod through TLP

Abstract

The invention relates to a method for machining and repairing the surface of a hydraulic rod through TLP, and relates to manufacturing, machining and remanufacturing of hydraulic rods. The method is characterized in that a transient liquid phase diffusion method is adopted, a layer of stainless steel sheet is wrapped around the surface of the hydraulic rod, and the problems that a hydraulic rod manufactured by an existing equipment technology pollutes the environment and a corrosion-resistant layer is prone to failure are solved. Technical equipment comprises hydraulic rod surface turning equipment, stainless steel sheet cutting and bending equipment, winding equipment connecting a middle layer, an argon arc welding machine, a pressing clamp, a TLP diffusion connection high-frequency powersupply and control equipment. Austenitic stainless steel or duplex stainless steel can be selected as needed. The layer of stainless steel is welded on the surface of the hydraulic rod manufactured by the technical equipment, so that stable corrosion resistance, mechanical property and usability are achieved; the process is high in automation degree and environment-friendly and pollution-free, the defects of air holes, discontinuous corrosion resistance layer and the like do not exist; and high-frequency heating is adopted, so that the heat influence area is small, and heating efficiency is high.

Description

technical field [0001] The invention relates to a method for processing and repairing the surface of a hydraulic rod by TLP diffusion welding. Background technique [0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). Among them, the coal mine hydraulic rod is the core component of the hydraulic support widely used in coal mines. The surface of the hydraulic rod will scratch against the sealing ring in the hydraulic cylinder during work, so the surface of the hydraulic rod needs to have a good finish, otherwise the sealing ring will be scratched and the hydraulic support will fail; in addition, in coal mining work The hydraulic rod on the surface will be hit by the splashing coal particles, so the surface of the hydraulic rod needs to have a certain hardness, otherwise it will cause pitting or pits and fail; due to the severe corrosion in the coal mine, the ser...

AI Technical Summary

Problems solved by technology

At present, there are two surface repair processes for the piston rod of the coal mine hydraulic support cylinder. The surface of the piston rod of the small oil cylinder is repaired by electroplating, but the electroplating layer is physically combined.

At the same time, electroplating also has serious environmental pollution problems.

For large-diameter piston rods, laser cladding technology is used instead of electroplating to repair the chrome layer, which is expensive and has low repair efficiency. It cannot repair multiple parts at the same time, and it is difficult to repair complex parts.

The laser cladding process does not have repair conditions for piston rod diameters below 120 mm, and it is difficult for companies to promote this repair technology on various hydraulic support pistons

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