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Indexed by:期刊论文

Date of Publication:2012-04-01

Journal:MEASUREMENT SCIENCE AND TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:23

Issue:4

ISSN No.:0957-0233

Key Words:closure measuring technique; end-tooth indexing table; measurement uncertainty; error separation

Abstract:The end-tooth indexing table (EIT) is widely used as angular reference in precision measurement or precision manufacturing fields. In order to improve the pitch accuracy of ultra-precision master gears, we designed an automatic end-tooth indexing system on a specific gear grinder. Theoretically, the indexing accuracy of an EIT can reach +/- 0.2 '' or even more, which can meet the machining requirements of ultra-precision gears with pitch deviation up to grade 0 (ISO1328-1:1995). However, the axial and radial misalignment of an EIT to the spindle will decrease the indexing accuracy of the gear grinder. In order to solve this difficulty, precision measurement and lapping on the datum face of an EIT will be necessary. How to measure the parallelism deviation correctly at the datum of the mating face of the EIT will be another difficulty. Using the closure measuring technique which allows error separation, in this paper the measurement platform is set up, the data acquisition and handling method are presented and an experimental measurement is carried out. The maximum parallelism deviation, which is between the target face of an EIT and its mating face, was reduced from about 4 to 0.29 mu m by adopting the closure measuring technique and precision lapping. It confirms that the closure measuring technique can implement precision measurement of dimensional measurands for an axisymmetric part.