No.1019E 2023Special Edition on Automotive Technologies Analysis of Hobbing Tooth Surface Polygonal Error |
| Category | TECHNICAL REPORT |
|---|---|
| Author | H. ITAYA Driveline Production Engineering Dept., Production Engineering Division S. OBATA S. NAKAGAWA Steering Production Engineering Dept., Production Engineering Division |
| Abstract | Hob gear cutting is widely used as an inexpensive and highly accurate processing method. Even in the rack and pinion type used in electric power steering, the pinion is machined by hob gear cutting, which has a major impact on performance. Hob processing is an extremely complicated processing in which a large number of cutting edges process the tooth surface, so analysis and evaluation are commensurately difficult. The authors clarified the mechanism of tooth surface creation for hob gear cutting and developed analysis software. We also proposed a new evaluation method. Finally, we prototyped and evaluated gears using this method, actually mounted them on an electric power steering system, and confirmed the usefulness of this method. |
| Keyword | hob, polygonal error, electric power steering, rack and pinion gear, friction force, tooth surface |
| Reference | 1) T. KOBAYASHI, H. SHIBATA: Estimation of Rack Swing Torque for Rack and Pinion Steering Gear, JTEKT ENGINEERING JOURNAL, No. 1006E (2009) 24. |
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