MILLING OF THIN WALLED COMPONENTS FROM ALUMINUM ALLOYS BY CONSIDERING THE CONDITIONS OF RIGIDITY AND AUTOMATION ASSIGNMENT ELEMENTS OF A CUTTING MODE ON CNC MACHINES
The current tendency to reduce the material consumption of manufactured products, the growing industry needs for the elastic elements of various devices have led to a continuous increase in the production of non-rigid body parts of high accuracy. In addition to non-rigid parts, which are deformed after manufacture to such an extent that in a free state they can go beyond the tolerances of size and shape, but consisting of a large number of difficult to combine “non-rigid elements”, the processing of which individually causes significant difficulties, and in combination with similar the rigidity of the elements, make the technology of their manufacture is very time-consuming. The most laborious process is not the machining itself, but the process of technological preparation of production, especially the design of control programs for CNC machines. The work is devoted to the problems of manufacturing thin-walled parts on modern CNC machines. The main reasons for going beyond the tolerance range of the linear dimensions of non-rigid elements of the workpiece are determined. The aim of the work is to develop a system for the automated appointment of the cutting mode when milling non-rigid blanks of machine parts. A mathematical model proposed for calculating the elastic squeezing of a thin wall during the milling process, the operability of which confirmed by the calculations in the Siemens NX CAE module. The boundary conditions necessary for the search for a rational cutting mode are determined. An algorithm proposed for calculating quality indicators for all available combinations of elements of the cutting mode, with the subsequent selection of the most suitable set of elements for the case in question. The selection criteria set by the requirements of the drawing for the manufactured part. An approach to automating this process presented. The result of calculation of a rational cutting mode taking into account conditions of rigidity of a preparation shown.