1206 内歯車歯面のラッピング仕上げ(OS-04 歯車の加工・製造)

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  • 1206 Tooth flank finishing of internal gears with lapping

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The objective of this research is to develop a gear lapping machine which can simultaneously make all tooth flanks of an internal gear smooth in a short time. A work gear is meshing with two lap gears as crossed helical gears and supported by a guide gear during the lapping. The two lap gears and the guide gear are made of nylon. Lapping slurry containing abrasive grains is supplied to the meshing teeth. The structure of the lapping machine designed and manufactured by the authors is shown. The work gears are lapped using lap gears which have tooth trace modified based on the calculated results to prevent the interference. They are evaluated with regard to the tooth roughness and the accuracy of the tooth profile. The results are as follows. (1) A work gear meshed with lap gears without the occurrence of the interference. (2) Tooth flanks of work gears were finished smooth as a maximum peak-valley height (Rz) of less than 1μm by this process. (3) It is necessary to enable to finish in shorter lapping time.

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