Method for producing pulley for belt-type continuously variable transmission
US8517801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2010 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/56
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method includes a grinding step of forming the shape of a contact surface, a grooving step of roughening the shaped contact surface to form grooves therein, and a contact surface lapping step of lapping the contact surface having the grooves with a lapping film to form oil grooves for holding a lubricant oil. The surface roughness of the contact surface is such that the maximum height roughness Rz is 4 μm or less, the mean length RSm of the roughness profile elements is 30 to 60 μm, the skewness Rsk of the roughness profile is −2.7 to −0.6 (no unit), the reduced peak height Rpk is 0.09 μm or less, and the reduced valley depth Rvk is 0.4 to 1.3 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.