COMPUTER-SIMULATION OF THE DEFORMATION OF SLENDER, MULTIDIAMETER ROLLERS DURING GRINDING

The paper presents an easily implemented computer simulation method for grinding to high accuracy a class of long slender rollers with a wide variety of multidiameter structures used in the plastic film industry, the cost of which compares favourably with normal trial-and-error in situ grinding. Mathematical models have been developed to describe the deformation of the roller when grinding conditions such as the rigidity of the supporting centres, the grinding force and also the oscillation of the workpiece in high speed rotation are taken into account. The proposed method has been verified by comparing it with the analytical results of a simple beam and also by verification from an in situ experiment. Based on the results of simulation, a modified control method, which is used to compensate the deflections in order to achieve the required accuracy of parallelism, is also proposed in order to cope with different types of rollers and different grinding conditions.