1987 Fiscal Year Final Research Report Summary
Study on Rolling Friction between a Ceramics Ball and Ceramics Tracks
| Project/Area Number |
61550105
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
機械要素
|
|---|
| Research Institution | SAITAMA University |
|---|
Principal Investigator |
ISHIKAWA Yoshio SAITAMA University, Professor, 工学部, 教授 (30008825)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
OHTAKI Hideyuki SAITAMA University, Professor, 工学部, 教授 (90160522)
|
|---|
| Project Period (FY) |
1986 – 1987
|
| Keywords | Rolling Friction / Ceramics Ball / Ceramics Track / Variation of Rolling Force / V-Shaped Groove / V溝軌道 |
|---|
| Research Abstract |
Ceramics are used widely as machine elements. In order to investigate the rolling friction between a ceramics ball and two ceramics tracks, some experiments were performed. For measuring of the friction behavior of a ceramics ball rolling on a ceramics flat plate and a V-shaped groove with changing the radial load and the viscosity of lubricant at a low speed, the great variation in the friction force was found.
The main results obtained are as follows.
(1) With repeated traversals on the same track, the plastic deformation gradually comes to saturated, and the equilibrium state is reached, then the deformation becomes primarily elastic. In both stages of the rolling process, large variations of the rolling force occur which are due to the surface wave and irregularities, but these magniiudes of the variation are almost the same.
(2) When a ball rolls in a V-shaped groove, the rolling friction is caused by the differential slipping taking place in the contact area between the groove surface and the ball. The calculated values of the rolling friction force approximately agreed with the experimental values for respective radial loads and viscosities of the lubricant.
(3) The differential slipping friction depends on the coefficient of the sliding friction between the ceramics ball and ceramics flat surface and varies largely according to the presence of the lubricant.
|
