| Project/Area Number |
06452334
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Material processing/treatments
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| Research Institution | Yokohama National University |
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Principal Investigator |
AZUSHIMA Akira Yokohama National University, Department of Mechanical Engineering and Material Science, Professor, 工学部, 教授 (30111462)
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| Co-Investigator(Kenkyū-buntansha) |
AOKI Koshiro Yokohama National University, Department of Mechanical Engineering and Material, 工学部, 助手 (70262409)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥4,900,000 (Direct Cost: ¥4,900,000)
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| Keywords | Fluorescer / Direct Observation / Tribology / Metal Forming / Lubrication Mechanism |
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| Research Abstract |
In metal forming, the tribological behavior at the interface between tool and workpiece is an important phenomenon, because it effects the coefficient of friction, the surface quality of productions and so on. If this phenomenon is understood, it will be possible to control the surface quality and tool life. In particular, the micro contact condition at the interface must be quantitatively understood. In order to make direct observation of the micro contact condition at the interface in drawing and extrusion, a transparent quartz glass is used. However, it is impossible to make direct observation of the roll-workpiece interface.
In this study, the lubricant with fluorescer is used to make clear the micro contact condition in rolling. In experiment, tribological facters such as rolling speed, viscosity of lubricant, surface roughness of material are varied. The results obtained as follows.
1. The lubricant with fluorescer is useful to make clear the micro contact condition in rolling.
2. The micro distribution of lubricant on the workpiece surface is made clear by the photograph.
3. The inlet film thickness in emulsion decreases with increasing viscosity of lubricant.
4. In emulsion with high viscosity of lubricant, an unevenness of lubricant is observed.
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