No.1013E 2016Special Edition on Steering and Drive Unit Technologies Clarification of Tribological Behavior on Tooth Surface of Resin Worm Gear for Electric Power Steering |
| Category | TECHNICAL PAPER |
|---|---|
| Author | T. KUNISHIMA K. MIYAKE T. KUROKAWA H. ARAI Material R&D Dept., Research & Development Headquarters |
| Abstract | We have clarifi ed the tribological behavior on tooth surface by devising a simplifi ed sliding test which simulates a resin worm gear. It was confi rmed that the main factor of tooth surface deformation was creep deformation, and increase of molecular mass of the polyamide contributed to long-term durability. In addition, surface roughness and temperature dependence of the friction coeffi cient were gathered through variation of fi lm thickness ratio using EHL theories and applied to rotating torque reduction by controlling tooth surface roughness. |
| Keyword | polyamide, worm gear, simplifi ed test, abrasion, creep deformation, EHL, torque reduction |
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