摘要
为降低高速工业平缝机的振动响应,应用机构动平衡方法,对其组成机构进行了优化设计。在某型平缝机高速运转时整机振动测试实验基础上,对采集的振动位移和加速度数据进行了分析,实验结果显示:平缝机中刺布挑线机构特性对整机的振动性能影响最大。对刺布挑线机构进行动力学分析,以振动力和振动力矩的组合构造优化目标函数,选取合理的权重系数,对该六杆机构的构件质量、质心位置等参数进行了动平衡优化设计。仿真结果表明:该平缝机高速运转时的整机动态性能得到了有效改善。
In order to reduce the vibration response produced by a high-speed industrial sewing machine, a method of dynamic balance and optimization was applied to improve the mechanisms of the sewing machine. Based on the vibration experiment for a certain type of sewing machine under high-speed rotating condition, data of the vibration displacement and acceleration were collected and analyzed, the needle bar mechanism and thread take-up mecha- nism were found to play a dominating role in the vibration of the sewing-machine according to the results of experi- ment. The dynamics analysis of the needle bar mechanism and the thread take-up mechanism was carried out. The optimal objective function considering the vibration force and vibration moment was built in order to optimize the pa- rameters such as mass and the placement of the mass centroid of the thread take-up mechanism. The reasonable values for weight coefficients were assigned and confirmed. The simulation result of optimization shows that the presented method is effective in improving the dynamic performance of the sewing machine working in high speed.
出处
《机械科学与技术》
CSCD
北大核心
2011年第3期448-452,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家科技重大专项计划项目(2009ZX04014-015)
国家自然科学基金项目(50575180)
陕西省重点学科建设专项资金项目资助
关键词
高速工业平缝机
动平衡优化
振动力
振动力矩
high-speed industrial sewing machine
dynamic balance and optimization
vibration torce
vibration moment
