摘要
针对以往基于钢丝与滑轮传力的凸轮提综的性能缺陷问题,将平面杆组、齿轮传动、拉伸弹簧与摆动滚子从动件盘形凸轮相结合,设计和开发了一种新型消极式弹簧回综凸轮开口机构。通过机构学分析、力学模型推导和经纱张力计算,确定了针对粗平布纯棉织物的回综弹簧刚度及初张力,建立了基于ADAMS/View平台的功能型仿真样机;考虑到真实工况下的开口承载情况,将由Step函数模拟的动态经纱张力加载至综框,有效地提高了综框升降过程的动力设计精度及可靠性;通过运动学、动力学仿真分析,验证了凸轮提综和弹簧回综的可行性。研究结果表明:在开口闭合过程中,综框行程约14.5 mm,凸轮摆杆角动程为12.4°,符合消极式凸轮开口工艺要求。
Aiming at the problem of force transmission through wire-steel and pulley in previous cam lifting,a new type of negative cam shedding mechanism with spring return was designed and developed on the basis of plane bar group,gear drive,tension spring and disk-cam mechanism with swinging roller follower.The stiffness and initial tension of the spring for coarse cotton fabric were determined through mechanism analysis,derivation of mechanical model and warp tension calculation.Functional simulation prototype of the mechanism was established on ADAMS/View platform.In view of real work situation on the mechanism,dynamic warp tension simulated by Step function was loaded into the heald frame which effectively improved dynamic design accuracy and reliability for lifting process of the heald frame.Based on that,the feasibility of cam lifting and spring return were verified by kinematic and dynamic simulation analysis.The results indicate that in the process of opening and closing,the travel range of heald frame is about 14.5 mm and angular range of swing bar on the cam is 12.4°,which can meet the technological requirements of negative cam shedding.
作者
邱海飞
党波
QIU Hai-fei;DANG Bo(College of Mechanical Engineering,Xijing University,Xi'an 710123,China)
出处
《机电工程》
CAS
北大核心
2021年第1期119-123,共5页
Journal of Mechanical & Electrical Engineering
基金
陕西省自然科学基础研究计划资助项目(2019JQ-923)
陕西省教育厅科研计划资助项目(15JK2177)
西京学院高层次人才专项基金资助项目(XJ20B09)
西京学院横向课题资助项目(2019610002001915)。
关键词
凸轮
弹簧
开口机构
Step函数
综框
cam
spring
shedding mechanism
Step function
heald frame
作者简介
邱海飞(1983-),男,陕西宝鸡人,副教授,主要从事机电产品数字化开发方面的研究。E-mail:qhf8386@163.com。
