摘要
针对旋转式吹瓶机凸轮机构运动平稳性差,不同尺寸高密度聚乙烯瓶合模位置存在差异,及运动过程中移动位置难以准确确定的问题,课题组建立了不同凸轮曲线的运动模型,分析了不同凸轮曲线的运动学、动力学特点,优化了现有圆柱凸轮的凸轮曲线。在摆线运动规律理论基础上以合模始末位置位移、速度和加速度及运动过程两处位移为约束条件建立了七次多项式运动规律曲线,并通过ADAMS建立吹瓶机凸轮机构模型,模拟其实际开合模的情况。仿真结果表明:优化后实现了对两处模具调节位置位移的控制,同时合模点加速度减小至17.15 mm/s2,冲击点由曲线连接点转移至运动过程中,合模点处冲击明显下降。研究使旋转头开合模振动降低,满足了优化的要求,实际使用中能通过调节可适应不同尺寸瓶子的生产。
Aiming at the problem that the rotary mechanism of the rotary bottle blow machine has poor motion stability,the difference of the clamping position of different HDPE bottles and the difficulty in accurately determining the moving position during the movement, the motion models of different cam curves were established, the kinematics and mechanical characteristics of different cam curves were analyzed and compared,and the cam curve of the existing cylindrical cam was optimized. On the basis of the theory of cycloidal motion law,the seventh-order polynomial motion law curve was established with the displacement of the clamping position,the velocity acceleration and the two displacements of the motion process. The model of the blower cam mechanism was established by ADAMS to simulate the actual opening and closing mode. The simulation results show that the optimization of the positional displacement of the two molds is realized after optimization,and the acceleration of the clamping point is reduced to 17. 15 mm/s2. The impact point is transferred from the curve connection point to the movement process,and the impact at the clamping point is significantly reduced. The results show that the vibration of the opening and closing mode of the rotating head can meet the requirements of optimization. In practical use,it can adapt to the production of bottles of different sizes by adjusting.
作者
包钊华
吴明晖
周围
BAO Zhaohua;WU Minghui;ZHOU Wei(School of Mechanical and Automotive Engineering,Shanghai University of Engineeing Science,Shanghai 201620,China;Military Representative Office of the Army Equipment Department in Xiangtan District,Xiangtan,Hunan 411100,China)
出处
《轻工机械》
CAS
2020年第4期64-68,共5页
Light Industry Machinery
