Finite element modeling of thermoelastic contact interaction in the abrasive surface treatment of machine components

Abstract

The method of centrifugal-rotary machining of metal components in the abrasive medium, which is one of the effective methods of final surface processing, is considered.  The Interaction of abrasive particle with surface of workpiece studying within through a dynamic task of the theory of thermoelasticity, based on friction and surface heating in the contact area. The objective of work is research the stress-strain state and temperature field  in accordance with process parameters (penetration depth , sliding speed and friction coefficient). The action of  abrasive particle is being replaced by the introduction of a round hard stamp that slides at a constant speed along of component surfaces. The task is done by a three-dimensional formulation in moving coordinate system associated with a stamp. The component is a rectangular parallelepiped, the dimensions  that are considerably larger than the diameter of a stamp. In the contact area, the Coulomb friction model is used. The coherence of  mechanical and temperature fields is due to the presence of the temperature term in the mechanical defining relations and the dependence on the friction forces of the heat source in the temperature boundary condition in the region of a stamp. The task is done numerically using the finite element method. The dependences of the force contact interaction , the stress fields and temperature in vicinity of the punch are found when the penetration depth, punch sliding speed and friction coefficient change. The results are presented in the form  tables and graphs that allow you to select rational parameters of the process, such as rotational speed, volume of abrasive medium.