Implementation method for high-precision linear feed motion of large turntable of machine tool

The invention relates to mechanical equipment manufacturing in the machining field, in particular to a method for achieving high-precision linear feeding motion of a large rotary table of a machine tool. The method is realized through the four steps of improving the mechanical precision of the large turntable feed shaft of the machine tool, avoiding thermal deformation based on the structural characteristics of the turntable, compensating the thermal deformation and controlling a heat source. The device can be applied to vertical and horizontal five-axis machining centers, boring and milling machines, vertical turning and milling combined machining centers and other various devices with rotary workbenches capable of moving along the linear axis, and the product precision and performance are improved. 本发明涉及加工领域的机械装备制造，具体涉及一种机床大型转台高精度直线进给运动的实现方法。该方法通过机床大型转台进给轴机械精度的提升、基于转台结构特点的热变形规避、热变形的补偿、热源的控制四个步骤来实现。本发明可应用于立式、卧式五轴加工中心、镗铣床及立式车铣复合加工中心及其他回转工作台可沿直线轴移动的各类设备，提升了产品精度及性能。