A measurement method for the manufacturing accuracy of plunge shaving cutter based on land identification

Abstract The manufacturing accuracy of plunge shaving cutter directly determines the machining error of gear. The plunge shaving cutter has a complex, discontinuous tooth surface structure, with the land being a key feature on the tooth surface. Its boundary causes measuring force fluctuations of the probe and the probe from the land and falls into the serration slot in existing measurement methods, resulting in the measurement results cannot truly reflect the machining accuracy. Therefore, a precision measurement method for the manufacturing accuracy of plunge shaving cutters is proposed in this paper, fully considering the influence of the land. A linkage model for land measurement is established, enabling the measurement of the land across three-teeth three-sections. The parameters of land and its distribution on the tooth surface are accurately determined through land identification, which provides the basis for the measurement of plunge shaving cutter. A linkage model between the probe and the rotary table is constructed based on the dip of land, ensuring that the tooth profile is always measured along the centerline of land by the probe, and the detrimental effect of the probe falling into the serration slot during conventional measurement is avoided. The segment measurement of tooth direction is achieved by controlling the probe using the land parameters, such as the midpoint of land and land width, which the fluctuation of measurement data is effectively reduced. Finally, the correctness of the method is verified through measurement comparison experiments. Based on traditional measurement methods, the influence of the land on the measurement position and path is fully considered in the proposed approach. Accurate measurement and evaluation of the manufacturing accuracy of plunge shaving cutter’s tooth profile and tooth direction are achieved, which provided technical support for the high-precision machining of gears.