| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
In the present study, the analytical and experimental investigations are performed to study the effect of workpiece excitation on workpiece chatter in end milling operation. The workpiece is supported by the low rigidity jig and is excited by an exciter in the feed direction of tool. First, the equations of motion of the low rigidity workpiece model which is modeled as a lumped mass system with orthogonal degrees of freedom in the feed and normal directions are derived. The excitation frequencies and excitation amplitudes to effectively reduce workpiece chatter are investigated by the direct numerical integration method. Furthermore, the numerical analysis and the experiments reveal that the workpiece chatter vibration is greatly reduced when the excitation frequency is equal to the natural frequency of workpiece in the feed direction.
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