Study on tube shell transverse displacements under its machining based on computer simulation

The possibility to increase parameter accuracy (pitch of thread, pressure angle, external and internal thread diameter) for various kinds of thread on the seamless casing is studied. As a means of achieving the target goal, the vibration amplitude contraction arising in the system ‘machine - widget - tool - part' is considered (MWTP). To solve the problem, a model which describes tube shell oscillations in the course of its processing and allows defining the impact on the work end of shell oscillations arising in its loose part is offered. The study is resulted in a mathematical model based on the initial parameters method. The calculations found the best (of the considered in the paper) support location diagram under which the arising oscillations are the lowest. The obtained results can be used at any enterprise dealing with thread cutting on the casing tubes. The investigation results in the following: - optimum quantity of supports for the considered equipment is five; - expansion in the number of supports by no means always leads to the vibration amplitude contraction; - changing in the relative position of supports is an effective means of the vibration amplitude contraction that acts to increase thread parameters accuracy.