Customized Rail Driven Forging And Casting Wheel Block Assembly for Crane

Cast steel wheel set is the wheel set with the widest application and the largest consumption in China at present. It is mainly composed of four parts: wheel axle, cast steel wheel, bearing and bearing box. Generally, wheel axle is made of two materials: 45 steel and 40Cr. When the load is relatively large, the company adopts other alloy steel, the driving wheel shaft and spline wheel shaft need to be modulated, and the wheel shaft of the motor car is generally not subject to heat treatment.

The cast steel wheel group generally has the following materials: cast steel 55 cast steel 50SiMn, cast steel 42CrMo. Because defects are easy to appear in the casting process, the yield of the wheel group is not as high as that of the forged wheel group. No defects are allowed on the wheel tread, and no large defects are allowed on the side. If there are small defects, they can be welded before reheating treatment.

Luoyang bearing, a famous domestic manufacturer, is used as the bearing. When the load is small, cylindrical tapered bearing is used. When the load is large, cylindrical self-aligning bearing is used. There are generally two kinds of bearing boxes, angular bearing box and circular bearing box. The prototype bearing box is generally used for 45 degree split structure. The bearing box is made of ductile iron and cast steel. When the load is large or in metallurgical occasions, we usually use cast steel bearing box. This kind of product has been more popular in China, our company generally uses spot supply.

Crane wheel group is a mechanical equipment composed of wheel and shaft, bearing and bearing box. The wheel set of crane is generally used to support the crane and load, and at the same time, it is a device for the crane to travel back and forth on the specified track. The application of crane wheel group is more complex, which is based on different product structure and different technical methods. However, the application center of gravity of the crane wheel group is still to control the wheel horizontal deflection value of the running crane wheel group. The design structure which is more commonly used in the schedule work and relatively simple in technological measures is to assemble the wheel on the bracket to form the wheel group of the crane.

The component material of wheel group is generally high-quality cast steel, because the general damage way of wheel is wear, pitting and crushing of hardened layer, so in order to increase the wear resistance and service life of wheel surface, the hard and hardened material is generally used, and the material of wheel is generally zg430-640 cast steel. In order to improve the wear resistance and service life of the wheel surface, the tread shall be subject to surface heat treatment, and the surface hardness shall be hb300-350, and the quenching depth shall not be less than 20 mm.

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