A PC-Based Synchronous Controller for NC Gear Grinding Machines Using Multithread CBN Wheel

[+] Author and Article Information
T. Emura, L. Wang

Department of Mechatronics and Precision Engineering, The Graduate School of Engineering, Tohoku University, 01 Aramaki-Aza Aoba, Aoba-Ku, Sendai, 980-8579, Japan

M. Yamanaka

Department of Machine Intelligence and Systems Engineering, The Graduate School of Engineering, Tohoku University 01 Aramaki-Aza Aoba, Aoba-Ku, Sendai, 980-8579, Japane-mail: yamanaka@elm.mech.tohoku.ac.jp

H. Nakamura

Division of New Products Designing, Toyoda Machine Works, Ltd. 1-1 Asahimachi, Kariya, Aichi, 448-0032, Japan

Y. Kato

KUBOTA Corp. 64 Ishizu-Kitamachi, Sakai, Osaka, 590-0823, Japan

Y. Teshigawara

NEC Ibaraki Ltd. 367-2 Sekidate, Sekijyomachi, Makabe-gun, Ibaraki, 308-0113, Japan

J. Mech. Des 123(4), 590-597 (May 01, 1999) (8 pages) doi:10.1115/1.1416481 History: Received May 01, 1999
Copyright © 2001 by ASME
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Schematic of the gear grinding machine that uses screw-shaped CBN wheel; (a) Front view; (b) Lateral view
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Block diagram of two-phase type PLL
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Block diagram of two-phase type PLL interpolator
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Block diagram of two-phase type PLL servo-controller
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Block diagram of control system
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Characteristics of servo-spindles; (a) Step response of grinding spindle; (b) Step response of work spindle
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Gear meshing; (a) Before meshed; (b) After meshed
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Detection of bottom of teeth using linear approximate sensors; (a) Output waveforms of linear approximate sensors; (b) Calculation of the center of bottom
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Detected pitch error of bottom position
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Reduction of position error using torque feed-forward compensation
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Procedure for final meshing
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Tracking errors under final meshing before grinding and after ground
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Gear grinding with two-thread screw-shaped CBN wheel
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Measured accuracy of gears ground with normal method; (a) 37-tooth gear; (b) 38-tooth gear
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Accuracy of ground gears (a) Profile error; (b) Lead error; (c) Adjacent pitch error
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Measured gear accuracy; Number of teeth: 38, Proposed method



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