发明名称 |
High speed drilling spindle with reciprocating ceramic shaft and double-gripping centrifugal chuck |
摘要 |
<p>A spindle (50) capable of operation at 200,000 revolutions per minute (RPM) with a reciprocating shaft design to minimize the moving mass. The spindle has a ceramic spindle shaft (62) to decrease the moving mass and increase the shaft stiffness for better dynamic stability. The spindle employs a built-in linear motor (110) to provide direct drilling motion to move the shaft along the axis, and a permanent magnet DC brushless motor (80) to rotate the spindle shaft. The linear motor is coupled to the shaft by a combination of an air bearing and a magnetic thrust bearing to reduce the size of the thrust area for better dynamic stability and reduction in stresses of material. A double gripping centrifugal chuck (150) is mounted in the hollow ceramic shaft, and reduces drill bit runout. <IMAGE></p> |
申请公布号 |
EP1475184(A2) |
申请公布日期 |
2004.11.10 |
申请号 |
EP20040077201 |
申请日期 |
1999.09.10 |
申请人 |
WESTWIND AIR BEARINGS LIMITED |
发明人 |
KOSMOWSKI, WOJCIECH B. |
分类号 |
B23B31/14;B23B31/18;B23B47/06;B23Q1/70;B23Q5/04;B23Q5/28;H05K3/00;(IPC1-7):B23Q1/70 |
主分类号 |
B23B31/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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