Browsing by Author "Fang, HS"

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Effects of the hob cutter regrinding and setting on ZE-type worm gear manufacture
(1996-10-01)
Fang, HS
;
Tsay, CB
;
機械工程學系
;
Department of Mechanical Engineering
A mathematical model for a ZE-type worm gear set is proposed. The characteristics of a ZE-type worm gear cut with an oversize hob cutter are investigated. Bearing contacts and kinematic errors in the ZE-type worm gear set due to regrinding of oversize hob cutters are also studied. Bearing contacts in the worm gear set were obtained using surface separation topology techniques and tooth contact analysis. It was found that bearing contact locations are sensitive to the hob cutter setting angle and setting distance. Kinematic error minimization was achieved modifying worm normal tooth angle. By applying the optimization theorem and computer simulation programs, optimum hob cutter settings and worm normal tooth angle were determined to improve bearing contact location and minimize the worm gear set kinematic errors. A numerical example is given to demonstrate the results of the investigation. The developed computer-aided manufacture program has successfully been applied to the worm gear manufacture and hob cutter design. Copyright (C) 1996.
Mathematical model and bearing contacts of the ZK-type worm gear set cut by oversize hob cutters
(1996-04-01)
Fang, HS
;
Tsay, CB
;
交大名義發表
;
機械工程學系
;
National Chiao Tung University
An oversize worm-type hob cutter is used to cut worm gears in this study. A mathematical model of the ZK-type worm gear set is developed based on the cutting mechanism and its tool parameters. Variations in bearing contact due to pitch diameter variations of oversize hob cutters and center distance variations of worm gear sets are also investigated. A numerical example is given to demonstrate the paths and dimensions of the bearing contacts of worm gear sets.
Mathematical model and bearing contacts of the ZN-type worm gear set cut by oversize hob cutters
(2000-12-01)
Fang, HS
;
Tsay, CB
;
機械工程學系
;
Department of Mechanical Engineering
The ZN-tyye oversize hob cutter for cutting of worm gears is investigated. The mathematical model of the ZN-type worm gear set is developed based on the cutting mechanism and hob cutter parameters, Influences of oversize hob cutter regrinding, worm-thread number and assembly errors on the bearing contacts and kinematical errors of the ZN-type worm gear set are investigated. A numerical example is given to demonstrate the bearing contacts and kinematical errors of the worm gear set. (C) 2000 Elsevier Science Ltd. All rights reserved.