Measurement of Spindle Rigidity by using a Magnet Loader
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概要
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The static rigidity of a rotating spindle in the radial direction is investigated in this research. A magnetic loading device (magnet loader) has been developed for the measurement. The magnet loader, which has coils and iron cores, generates the electromagnetic force and attracts a dummy tool attached to the spindle. However, the eddy current is generated in the dummy tool with the spindle rotation and reduces the attractive force at high spindle speed. In order to understand the magnetic flux and eddy current in the dummy tool, the electromagnetic field analysis by FEM was carried out. Grooves on the attraction surface of the dummy tool were designed to cut the eddy current flow. The dimension of the groove were decided based on the FEM analysis, and the designed tool were manufactured and tested. The test result shows that the designed tool successfully reduces the eddy current and recovers the attractive force. By using the magnet loader and the grooved tool, the spindle rigidity can be measured when the spindle rotates with a speed up to 10,000 min-1.
著者
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YAMAZAKI Taku
Product Development Dept., Yamazaki Mazak Corporation
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MATSUBARA Atsushi
Dept. of Micro Engineering, Kyoto University
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FUJITA Tomoya
Dept. of Micro Engineering, Kyoto University
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MURAKI Toshiyuki
New Technology Development Dept., Yamazaki Mazak Corporation
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ASANO Kohei
New Technology Development Dept., Yamazaki Mazak Corporation
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KAWASHIMA Kazuyuki
Servo Motor Manufacturing Dept., Mitsubishi Electric Corporation
関連論文
- Measurement of Spindle Rigidity by using a Magnet Loader
- B3 Measurement of Spindle Stiffness by using a Magnet Loader(Advanced machine tool)