旋转式喇叭嘴与虎克式切刀干涉机理与规避方法

为解决烟条切割过程中因旋转式喇叭嘴与虎克式切刀干涉而造成烟支端面不整齐等问题，以ZJ119卷接机组烟条切割装置为对象，对烟条切割运动过程进行分析。通过研究喇叭嘴与切刀发生干涉的机理，建立烟条切割装置的等效运动学模型，并结合数值分析与Adams仿真计算3种喇叭嘴调整方法中喇叭嘴与切刀不产生干涉的最小间隙。结果表明:①在烟条切割过程中，切刀在切入与切出时刻与喇叭嘴在烟条轴线方向上存在位移差是产生干涉的主要原因；②单侧间隙调整、双侧间隙调整和前后排间隙调整3种方法中不发生干涉的最小间隙分别为0.63、0.69和0.51 mm。该方法可为提高烟条切割质量提供支持。 

Interference mechanism of rotary ledger and Hooke cutter and methods of interference prevention

In order to avoid the rough cut edge of tobacco rod caused by the interference between rotary ledger and Hooke cutter, the cutoff process of tobacco rod in ZJ119 filter cigarette maker was analyzed. The equivalent kinematic model for tobacco rod cutting unit was established via studying the interference mechanism between ledger and cutting blade. Three ledger settings were investigated, and corresponding minimum clearances, under which the interference was preventable, were calculated by numerical analysis combining with Adams simulation. The results showed that: 1) In the cutoff process of tobacco rod, the interference was mainly caused by the displacement difference between the blade and the ledger in the axial direction of tobacco rod at the points of cutting in and cutting out. 2) The minimum clearances for one-side, both-side, and front- and rear-row clearance settings were 0.63, 0.69 and 0.51 mm respectively. This method provides a support for improving the cut edge appearance of tobacco rod.