Improvement of Technology of Vehicle Electric Motors Casing Repair

Electric motors are widely used in modern vehicles to drive various mechanisms (power steering, generators, starters, etc.). Normal operation and traffic safety depend on their reliability. Modern repairing technologies make it possible to obtain 70-80% of the secondary resource of the car electric equipment. The solution to the problem of the electric motor cylindrical casing panel homogenous strain is obtained. It showed that in the repair conditions by flattering or expansion-reduction, the casing diameter does not significantly affect the circumferential deformations equality. The workpiece diameter invariability does not affect the high accuracy of the grooves and flanges zones planned final dimensions. Since the tool is a roll-roller, it is universal for flattening and strain of various diameters of the casing cylinders. This is a feature of this repair method and its adaptability to the conditions of single-piece manufacture. To align the casing cylinders out-of-roundness and the dents on them, it is enough to make the operating stroke of the driven roller by 0.5-1 mm of radial infeed, which will lead to plastic tangential and meridional workpiece strain and its flattening. This process does not require large energy costs, since the strain is carried out by the tool locally, in the roll contact zone, which is of great importance in the conditions of repair workshops.