Monitoring Method of Machining Error of Long and Thin Cylinder in Boring Process

An online monitoring method of machining error of the long and thin cylinder during boring process is introduced. Machining errors usually appear as the offset of spatial location of actual cutting path compared to ideal cutting path. In order to monitor machining error of workpiece, the tool actual cutting path on workpiece in boring process was studied. The multi-body system theory and processing information obtained through built-in position sensors of CNC machine tools and external sensors were employed to establish the tool cutting path simulation model. Multiple factors affecting quality of the long and thin cylinder, such as machining distortion of workpiece, clamping error, radial rotation error of the spindle and motion error of machine tools, were took into account in this model. Finally, to verify the proposed method, a machining test has been conducted.