摘要
针对三维织机中打纬机构存在的纬纱受力不均、极限位置停歇时间短及打纬力不足等问题,提出一种通过二臂摇杆串联曲柄摇杆机构与RRP型Ⅱ级杆组构成的新型六连杆平行打纬机构。分析了钢筘处于极限位置和力最佳传递性能的条件,根据刚体导引理论和近似停歇要求设计出合理的机构尺寸,利用Matlab对结果进行运动学分析仿真。仿真结果表明:该打纬机构各连杆运动平缓,在后死心位置主轴转动120°范围内钢筘近似停歇,在前死心位置钢筘加速度大。该平行打纬机构保证了纬纱所受打纬力一致和极限位置钢筘近似停歇时间长的要求,提供了织物打紧所需的打纬力,满足打纬工艺要求。
In view of the problems of uneven weft force,short rest time at limit position and insufficient wefting force in the weft mechanism of 3D loom,a new six-bar parallel wefting mechanism was proposed through the series connection of a two-arm rocker crank rocker and an RRP type II level rod group.The conditions for the steel reed to be in the limit position and the force to be optimally transmitted were analyzed.The proper mechanism size was designed according to the rigid body guidance theory and the approximate rest requirement.The results were simulated by Matlab for kinematic analysis.The simulation results showed that the motion each link of the wefting mechanism was gentle,the steel reed was approximately at rest within the range of 120°rotation of the main shaft at the rear dead center position,and the acceleration of the steel reed was large at the front dead center position.The parallel wefting mechanism ensured that the wefting force acting on theft was consistent and that the steel reed was approximately at rest at the limit position for a long time.It provided the wefting force needed to tighten the fabric and meet wefting process requirements.
作者
何家明
闫红霞
孙志军
叶音平
张阳
刘川
HE Jiaming;YAN Hongxia;SUN Zhijun;YE Yinping;ZHANG Yang;LIU Chuan(Donghua University,Shanghai,201620,China)
出处
《棉纺织技术》
2025年第8期72-77,共6页
Cotton Textile Technology
基金
江苏省重点研发计划项目(BE2023070)。
