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- W20008663 abstract "This paper describes a newly developed lathe for machining numerious non-circular profile article with high accuracy and high efficiency. In general, the machining of non-circular profile articles, such as camshafts and rotary engines, has conventionally been carried out by means of a copying lathe. This method sets upper bounds to machining speed owing to mechanical factors. In order to machine a non-circular profile object by a lathe with high efficiency, a lathe has been developed whose the cutting tool is positioned in-phase with the rotation of the spindle by the use of an electro-hydraulic servo-mechanism controlled numerically. When the speed of the spindle is increased to improve machining efficiency, the positioning of the cutting tool tends to become out of phase with the rotation owing to the delay caused in the servo-system. The inverse transfer function compensation, which is a kind of feed-forward control, has been applied to the system in order to overcome the problem of the delay. And application of this compensation has enabled improvement in positioning accuracy of ±0.5 mm to ±0.1 mm at a spindle rotation of 180 rpm. This result and some examples of the products machined by the developed lathe are shown in the paper." @default.
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- W20008663 date "1988-01-01" @default.
- W20008663 modified "2023-09-25" @default.
- W20008663 title "Study of non-circular machining. (1st report). The application of inverse transfer function compensation." @default.
- W20008663 doi "https://doi.org/10.2493/jjspe.54.145" @default.
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