The method for determining the amount of interference formed during the assembly of the rim and disk of the wheel of automobile and tractor

The disk-rim system is a complex structure with a variety of properties that have not yet been fully studied. The vehicle wheel is an axisymmetric structure consisting of a rim and a disk for attaching it to the hub. On the one hand, the outer diameter of the disk (flange) is welded around the circumference to the inner diameter of the rim (shelf), forming a rigid one-piece connection. On the other hand, using a bolted connection, the disk is attached to the hub, forming a wheel-hub assembly. The assembly line of the rim and wheel disk of a truck consists of the following technological operations: pressing the disk into the rim, welding the outer seam, welding the inner seam, cleaning the surface from welding spatter, punching the valve hole, curing burrs on the valve hole, and controlling the runout. When pressing the disk into the rim, it is necessary to know the amount of interference, as well as the distribution of radial and tangential stresses. Determining the amount of interference is an urgent task, since this characteristic is fundamental when assembling the rim and wheel disc. It was found that for radial stresses the compression is observed. Its largest value is located at the boundary of the disk and the rim. For tangential stresses the tension is observed. Its largest value is located at the boundary of the disk and the rim. Calculations showed that for a 400 mm wheel disk, a 300 mm wheel rim an elastic modulus is 2∙104 MPa, a force modulus is 600 MPa, an interference fit is 0,0865 mm.

pressing, disk, rim, wheel, interference