Increase of accuracy of processing of non-rigid parts in centrals on the machine with CNC
Keywords:
shaft processing, turning, machine with CNC, shape error, accuracy of machining, deformation of shaft, cutting forceAbstract
The article describes a method of calculating a trajectory of a lathe tool on a CNC machine to compensate elastic deformation during processingof a workpiece. In the process of turning bodies of rotation with a small rigidity under the action of the cutting force Pythe 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.
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