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本文在试验、分析几种升降台铣床垂向滚珠丝杠副结构、性能的基础上，提出了自锁良好、寿命较长的弹性可调轻阻尼自锁的较合理结构。
Based on the experiment and analysis of the structure and performance of vertical ball screw for several kinds of lifting table milling machines, this paper presents a more reasonable structure with self-locking and long-life flexible adjustable light damping and self-locking.