簇绒地毯织机耦联轴系的铰链间隙对毯面绒高的影响

为给高质量簇绒地毯的开发提供设备保障，针对运动副铰链中存在间隙的问题，以3处易磨损的铰链间隙，基于虚拟样机ADAMS软件得到不同间隙下簇绒针的位移、速度、加速度及铰链支反力，从而根据针位移分析铰链间隙对毯面绒高的影响。再以铰链点坐标及杆长为设计变量，以铰链副间的冲击力和针行程最小为优化目标，对该簇绒针机构进行多目标优化，得到最优的铰链坐标及杆长，将铰链间隙对绒高的影响降到最低。

Influence of joint clearances of coupling shaft system on pile height in tufting machine

Focusing on tufting machine type of DHUN801D-400 and based on the problem of joint clearances in kinematic pairs, the joint clearances of coupling shafts system in needle mechanism are studied. Firstly, the structure of coupling shaft system in tufting machine is introduced and kinematic analysis is studied. Secondly, the three joints with clearance are considered in needle mechanism. And the displacement, velocity, acceleration and reaction force between kinematic pair in needle mechanism are obtained using the ADMAS software, then the impact on pile height is obtained according to the displacement of needle. Thirdly, regarding the coordinates of hinged points and length of bars as design variables, the reaction force and stroke of needle as objective function, the multi-objective optimization is carried out. Finally, the optimal hinge coordinates and the length of bars are got, and the influence of joints clearance on pile height is decreased to lowest.