为准确反馈卷取机助卷辊支臂角位移，支臂与轴必须牢固联接。
The wrapper arm with the fulcrum shaft in coilers must be fitted firmly to feedback precisely the angle movement of the wrapper arm.
在理论分析和试验研究的基础上，找出地下卷取机助卷辊冲击负荷过大的主要原因。
Based on theoretical analyses and experiments, main reasons have been discovered that cause excessive impact load on the wrapper roll of down coiler.
助卷辊主要参数包括压紧力、送进力、辊缝值和分布位置的确定，对地下卷取机的设计和控制具有十分重要的意义。
Chief parameters of aided reel roll includes tight pressure, send entrance force, roll gap and distributed position, determination of that is great importance to design and control for down coilers.
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