Plasma 3D fast forming and remanufacturing method and equipment of train wheels

Abstract

The invention discloses a plasma 3D fast forming and remanufacturing method and equipment of train wheels. The equipment comprises a monitoring system, a plasma beam machining system, a machining device for machining to-be-repaired train wheels, a three-axis moving mechanism for driving the machining device to move and a horizontal printing platform for placing the to-be-repaired train wheels. The plasma beam machining system comprises a plasma generator, a gas supply device, a feeding device and a printing positioning adjusting device. The monitoring system comprises a horizontal movement controller, a temperature detecting unit, a distance detecting unit, a printing distance adjusting controller and a rotation controller, wherein the temperature detecting unit and the printing distance adjusting controller form a temperature adjusting and control device. The method includes the steps of firstly, detecting train wheel defects; secondly, repairing the train wheels. The plasma 3D fast forming and remanufacturing method and equipment has the advantages that the equipment is reasonable in design, simple to operate, high in efficiency, good in use effect and high in repairing efficiency, a closed forming room is not needed, the repairing process is directly performed under an atmospheric environment, and the repaired train wheels are good in quality.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, and in particular relates to a train wheel plasma 3D rapid prototyping remanufacturing equipment and method. Background technique [0002] The rim of the train wheel is prone to wear during the operation of the train, especially when turning; when the rim of the train wheel is worn to a certain extent, the stable operation of the train cannot be guaranteed, so that the whole train wheel pair is scrapped and replaced with a new train wheel pair. In order to reduce costs and improve resource utilization, surfacing welding is currently used to remanufacture the rims of train wheels with oversized dimensions. [0003] When using the surfacing welding method to manufacture the rim of the train wheel, there are mainly the following three problems: [0004] First, surfacing welding requires preheating and subsequent heat treatment of the train wheels, which requires the train wheels to be dis...

AI Technical Summary

Problems solved by technology

[0004] First, surfacing welding requires preheating and subsequent heat treatment of the train wheels, which requires the train wheels to be disassembled from the train wheel set. Because the equipment of the wheels and shafts is to expand by heating the wheels, then insert them into the shafts and cool them down. The rear shrinkage is firmly combined. Therefore, the disassembly process of the wheel and axle is complicated and special tools must be used, and the disassembly cost is high. At the same time, disassembly and reassembly will inevitably affect the reliability of the train wheel set;

[0005] Second, surfacing welding requires preheating and subsequent heat treatment of the train wheel, and the bearing needs to be disassembled from the shaft. The disassembly process of the bearing is complicated and special tools must be used, and the disassembly cost is high;

[0006] Third, surfacing welding requires preheating and subsequent heat treatment of train wheels, dismantling of wheels and bearings, complex manufacturing process, long time required, and low efficiency of surfacing welding rims

But at present, there are three main problems in the selective electron beam rapid prototyping technology: first, the electron beam rapid prototyping technology needs a vacuum environment to form the energy source electron beam and avoid the oxidation of metal parts during the forming process

This makes the structure of the electron beam rapid prototyping equipment complex, the size of the molded parts is limited, and the molding equipment is expensive; second, the electron beam rapid prototyping technology requires a powder spreading system or a molding material supply system

This makes the structure of the electron beam rapid prototyping equipment complex, not only the size of the formed parts is limited, but also the forming efficiency is low; third, in order to ensure the mechanical properties of the parts, the electron beam rapid prototyping technology requires spherical metal powder with good fluidity

This makes SLM rapid prototyping equipment expensive to run

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