Influence of continuously variable lateral force on thickness of the material during strip thinning

Abstract

In this research a tribological model of the sliding of sheet metal between the two contact elements that perform thinning was investigated. Unlike usual thinning procedures, here are applied previously set variable functional dependences of the lateral force on the stroke, which are given simultaneously during the thinning procedure. In this way authors tried to better manage the process of deep drawing with thinning as well as to manage the change in thickness by application of variable lateral force. The investigation was done using one functional dependency of variable lateral force, one type of lubricant and one material. Besides, an original computerized testing device was developed. Based on the obtained diagrams it was possible to calculate the coefficient of friction and evaluate the obtained results, especially possibility to achieve certain thickness of the sample across the cross section after the thinning.