发明名称 |
Steam generator tubesheet face machining apparatus |
摘要 |
An adjustable face milling cutter is carried on a turntable rotatable about a central axis that is coaxial with the cylindrical shell of the steam generator in which the tubesheet is located, to machine a circular path on the upper tubesheet surface. For complete circle-by-circle scanning of the tubesheet surface, the radius of the circular machined path is variable by virtue of mounting the milling cutter on the outer periphery of a circular mounting member turnable to different locked rotary positions about an off-center pivot axis on the turntable. The rotary support for the turntable is at its outer periphery, as provided by an encircling support ring which in turn is supported by a ball bearing assembly having an inner race secured to the turntable top and an outer race secured to the support ring top; teeth on the inner race being provided to accommodate a motor-operated drive gear. The support ring is centered in the steam generator shell by jack screws and is supported by such shell via a circular array of support lugs welded to the inner wall of such shell.
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申请公布号 |
US4362447(A) |
申请公布日期 |
1982.12.07 |
申请号 |
US19790061227 |
申请日期 |
1979.07.27 |
申请人 |
WESTINGHOUSE ELECTRIC CORP. |
发明人 |
PEKAR, FRANK M.;COOPER, JR., FRANK W. |
分类号 |
B23B3/26;B23C3/00;F22B37/00;(IPC1-7):B23C1/20;B23B3/22;B23F21/03 |
主分类号 |
B23B3/26 |
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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