2004 Fiscal Year Final Research Report Summary
Enhancement of the fitness for high speed and high precision machining center
| Project/Area Number |
15560095
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MATSUBARA Atsushi KYOTO UNIVERSITY, Graduate School of Engineering, Professor, 工学研究科, 教授 (80243054)
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| Co-Investigator(Kenkyū-buntansha) |
IBARAKI Soichi KYOTO UNIVERSITY, Graduate School of Engineering, Assistant Professor, 工学研究科, 助手 (80335190)
SUZUKI Yasuhiko Yamazaki Mazak Corporation, Research Engineer, 開発設計事業部加工技術研究センター, 研究員(研究職)
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| Project Period (FY) |
2003 – 2004
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| Keywords | NC Machine Tools / Base vibration / Dynamic model / Vibration / Feed Drive Systems / IIR filter / Servo system / Thermal displacement |
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| Research Abstract |
A dynamic synthesis model, which consist of a base, column, feed drive, and floor foundation, is developed for the enhancement of the performance of machining centers. By using this model, several countermeasures to enhance the dynamic performance are investigated. A thermal synthesis model is investigated for the fitness enhancement as well.
(1)For the enhancement of the dynamic fitness, design strategies for anti-vibration of base-column-feed drive system are proposed. Improvement of the installation, reduction of the column mass, and driving scheme at center of gravity can provide good positioning accuracy.
(2)By adding IIR filters in the velocity loop of the CNC-Servo system, positioning accuracy is improved without changing machine stricture. Second order der IIR filters are investigated to show their anti-vibration mechanism and performance. In the case of lower damping system, robustness is found to be major problems.
(3)Dual actuation driving systems are investigated whether it can improve the dynamic performance of the total machine. The dual actuation system can improve the positioning accuracy without much increment of weight and cost, so it can contribute to the enhancement of the dynamic fitness.
(4)Thermal synthesis is difficult to be established. In a ball screw on which thermal recourse moves and a high speed spindle, typical temperatures and thermal displacements are measured. Thermal distributions and displacements are modeled as the product of thermal modes and time functions in the stationary conditions.
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Research Products
(8 results)
