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1. 发明授权

US4233834A Method and apparatus for producing zircaloy tubes and zircaloy tubes thus produced 失效
标题翻译：用于生产如此生产的氧化锆管和氧化锆管的方法和设备
公开(公告)号：US4233834A
公开(公告)日：1980-11-18
申请号：US6757
申请日：1979-01-26
申请人： Ulf A. Matinlassi
发明人： Ulf A. Matinlassi
IPC分类号： B21B3/00 , B21B21/00 , G21C3/06 , B21B17/06
CPC分类号： G21C21/02 , B21B21/005 , G21C3/06 , B21B3/00 , Y02E30/40
摘要： Improved zircaloy tubes for PWR reactors are produced by a method and apparatus by controlling spirality, that is, the spiral formation of the wall-thickness eccentricity. In the past, that spiral formation has caused the tubes to bow during use, and the present invention permits the maintenance of that spiral formation to acceptable limits. The hollow or workpiece is positioned upon a cylindrical mandrel and is advanced step-by-step through a work zone between a pair of rolls having grooves which define the work zone. The workpiece is turned through a predetermined angle on the mandrel prior to each rocking cycle. The present invention involves controlling the angle at which the metal working forces are exerted so as to minimize the turning moment or torque effect which results in producing the spiral formation.
摘要翻译：用于PWR反应器的改进的氧化锆管由通过控制螺旋度的方法和装置产生，即壁厚偏心的螺旋形成。在过去，这种螺旋形状使得管在使用过程中弯曲，并且本发明允许维持该螺旋形成到可接受的极限。中空或工件定位在圆柱形心轴上，并且一步一步地穿过具有限定工作区的凹槽的一对辊之间的工作区。在每个摆动循环之前，工件在心轴上转动预定的角度。本发明涉及控制施加金属加工力的角度，以使得产生螺旋形成的转矩或扭矩效应最小化。

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