发明名称 |
High speed drilling spindle with reciprocating shaft and double-gripping centrifugal chuck |
摘要 |
A spindle 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 to decrease the moving mass and increase the shaft stiffness for better dynamic stability. The spindle employs a built-in linear motor to provide direct drilling motion to move the shaft along the axis, and a permanent magnet DC brushless motor 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 is mounted in the hollow ceramic shaft, and reduces drill bit runout.
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申请公布号 |
US6227777(B1) |
申请公布日期 |
2001.05.08 |
申请号 |
US19990436817 |
申请日期 |
1999.11.09 |
申请人 |
ELECTRO SCIENTIFIC INDUSTRIES, INC. |
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):B23C1/02 |
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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