Adjustment of Axis Offset Errors during Reaming

Abstract

The reaming process normally takes place at the end of manufacturing processes when a lot of value has already been added. Therefore, reaming plays an important role for the quality of the finished product. To achieve this high quality, the occurring process errors caused by the machine tool and the reamer or incorrect workpiece handling have to be minimised. Measured data of the reaming process allow the prediction of occurring process errors without the need to evaluate the bore with a coordinate measuring machine. However, manufacturing is already completed at this stage and the correction of errors is either no longer possible or very costly. This paper presents an approach to detect axis offsets within the entry phase of the reamer by analysing the process forces. The calculated offset is then compensated by adjusting the nominal value of the motion control.

Strategies for Mastering Uncertainty

“…Thus, we can compensate the axial misalignment, before the actual reaming process is conducted. Despite a disrupted cut in the entry phase of the reamer, due to the compensation of the axial misalignment the countersinking process does not lead to a significant deterioration of the bore [28]. The proposed method is therefore suitable for compensating axial displacements and thus reaming the bores at the desired location.…”

“…An alternative approach based on the active process control to reduce the effects of uncertainty in reaming is to apply suitable machining strategies [28]. The axis-offset is determined by the forces during the penetration phase with a sensor-integrated reaming tool.…”