INCREASE OF ACCURACY OF PROCESSING OF NON-RIGID PARTS IN CENTRALS ON THE MACHINE WITH CNC
The article describes a method of calculating a trajectory of a lathe tool on a CNC machine to compensate elastic deformation during processing of a workpiece. In the process of turning bodies of rotation with a small rigidity under the action of the cutting force <i>P<sub>y</sub></i> the elastic deformation take place, which adversely affects the accuracy of the machined surface. As a result, you receive the error in the form of barrel-shaped, celebratory or a combination of these errors depending on the stiffness of the machine and its individual parts. Based on the calculation of deformation at a constant depth of cut is proposed to determine error, which should further offset using the given calculation method. It allows for compensation by pre-emphasis of the trajectory in the programming phase of the control program. Thus in the process of turning is obtained the desired diameter with a minimum error, which is lead a positively influence the reduction additional treatment for removal of errors of form and improvement of quality of processing parts.