1993 Fiscal Year Final Research Report Summary
Research on sliding accuracy and precision design of externally pressurized gas-lubricated linear guide way
| Project/Area Number |
04650131
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
機械要素
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
YABE Hiroshi Kyoto Univ.Faculty of Engrg.Professor, 工学部, 教授 (30025936)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Aerostatic linear guide way / Air-slide / Sliding accuracy / Machining error / Precision design / Groove compensation |
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| Research Abstract |
The sliding accuracy characteristics of externally pressurized gas-lubricated linear guide way are investigated in this research with a special attention paid to the relation between the sliding accuracy and the machning error of the mating surface of the guide-way rail. The obtained results are summarized as follows :
(1) Theoretical analysis method of sliding accuracy characteristics, such as the variation of floating height and the pitching-mode angular fluctuation of the bearing pad, is established on the basis of the pressure distribution in the bearing gap obtained by divergent formulation scheme.
(2) The sliding attitude of the bearing pad is characterized by the ratio of the pitch of waviness of the rail surface to the length of the bearing pad. According to the change of this value, either a state with maximum variation in gap height during the travel of the pad on the rail or a state with maximum angular fluctuation of the pad appears in turn.
(3) The experimental results with using a square shaft with step-type undulation on its surface coincide well with theoretical ones, which may verify the theoretical analysis.
(4) A simple model for the analysis of the sliding accuracy of the bearing pad is introduced ; some characteristic quantities, which relates the waviness of the rail surface with the pad attitude, are formulated with the aid of this model.
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