Plasma 3D printing remanufacturing equipment and method for train wheel

Abstract

The invention discloses plasma 3D printing remanufacturing equipment and method for a train wheel. The plasma 3D printing remanufacturing equipment consists of a monitoring system, a plasma beam processing system, a machining device for machining a train wheel to be repaired, a triaxial moving mechanism used for driving the machining device to move and a horizontal printing platform used for placing the train wheel to be repaired, wherein the plasma beam processing system consists of a plasma generator, a printing position adjusting device, an air supply device and a powder feeder; and the monitoring system comprises a horizontal movement controller, a temperature detection unit, a distance detection unit, a printing distance adjustment controller and a rotation controller, and the temperature detection unit and the printing distance adjustment controller constitute a temperature adjustment and control device. The plasma 3D printing remanufacturing method comprises the following steps: firstly, detecting defects of the train wheel; and secondly, repairing the train wheel. The plasma 3D printing remanufacturing equipment is reasonable in design, simple and convenient to operate, high in efficiency and good in using effect, the repair process is directly carried out in the atmospheric environment without a closed molding room, the repaired train wheel is good in quality, and the repair efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, and in particular relates to a train wheel plasma 3D printing 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 disassembled...

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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