碳纤维多层织机打纬机构运动学分析与尺度综合

针对碳纤维多层织造过程中各层纬纱受力一致性需求，提出基于无急回特性曲柄摇杆机构串联转动-转动-移动副型基本杆组的轴向六连杆打纬机构，并给出刚体导引与机构几何关系相结合的尺度综合方法。在考虑钢筘极限位置和力传递性能的情况下，优化设计打纬机构，确定合理的机构尺寸和传动角。运动学仿真结果表明：钢筘极限位置和打纬动程的误差率均为0.06%，且在前死心时钢筘打纬加速度大，在后死心附近加速度变化较小，利于厚重织物打紧和机器降噪。轴向六连杆打纬机构驱动钢筘垂直作用于碳纤维多层织物的各层纬纱，受力均匀，且其尺度综合方法为考虑织造工艺、运动学性能和机构尺寸等特定要求的打纬机构设计与优化提供一定的理论基础和实验数据。

Kinematics analysis and dimension synthesis of beating-up mechanism for carbon fiber multi-layer loom

The axial six-bar linkage beating-up mechanism based on the crank and rocker mechanism with non-quick return characteristics series-connected with the basic linkage group in two revolute joints and one prismatic joint model was proposed aiming at the demand of consistent force-loading to the weft yarn on each layer during the carbon fiber multilayer weaving process. The dimension comprehensive method with the combination of rigid body guidance and the mechanism geometrical relations was also provided. Taking into consideration on the limit position of reed and the force transfer property, the design of beating-up mechanism was optimized, and the feasible size of machine and transmission angle were determined. Simulation results of kinematics show that the error rate of both the reed limit position and the movement of beating-up mechanism is 0 . 06%. The reed beating-up has a high acceleration at the front dead center, and the acceleration has few changes near the back dead center, which is beneficial to the tightening of heavy fabric and machine noise reduction. Driven by the axial six-bar linkage beating-up mechanism, the reed exerts perpendicular force to weft yarn on each layer of carbon fiber multilayer fabric. Each layer of the fabric is subjected to even force. The dimension comprehensive method provides a certain theoretical basis and experimental data for the design and optimization of beating-up mechanism taking account of specific requirements such as weaving technology, kinetic performance and machine size.