Numerical analysis of induction heating-based assembly and disassembly fo shrink fits

Abstract

The paper deals with mathematical modelling of assembly and disassembly of structural parts that are coupled with interference fit by means of induction heating. The process is formulated as a quasi-coupled electromagnetic-thermoelastic problem in 2D arrangement. Its solution is based on time stepping with built-in internal iterative processes for improvement of accuracy of parameters of linearised equations describing all three involved fields that are in each time step solved by the finite element techniques. The suggested methodology is illustrated on an example of fixing and disassembly of a drill in a chuck. Considered are real characteristics such as radial interference between the drill shank and chuck, power of the inductor, physical parameters of used materials, conditions of cooling and other quantities responsible for reliable operation of the system.