纺织鞋面印花机网框凸轮升降机构设计及优化

摘要

根据对纺织鞋面印花机工艺要求的分析,设计印花机的网框凸轮升降机构,以提高印花机的工作效率.根据凸轮设计的反转法原理,建立摆线运动规律下凸轮轮廓曲线的数学模型,运用MATLAB软件编程设计出摆线运动规律下凸轮推杆的位移、速度和加速度理论运动曲线;在多体动力学软件ADAMS中输入模型和添加约束,得到凸轮推杆的位移、速度和加速度仿真运动曲线;最后,建立优化数学模型求得凸轮升降机构最大压力角和对应的凸轮转角的全局最优解.结果表明,在MATLAB软件中编程设计的运动学曲线与在 ADAMS软件中仿真得出的运动学曲线基本一致,验证了MATLAB软件编程设计的运动学曲线是合理的,优化得到最大压力角为7.7371°,对应的凸轮转角为72.2989°,所设计的凸轮曲线传动效率较高,符合纺织鞋面印花机的工艺要求.结果表明,该设计及优化可行,已应用于实际生产中,有较高的实际应用推广价值.%Based on the analysis of the requirements of textile vamp printing machine,the cam frame lifting mechanism designed for printing machine,to improve the efficiency of the printing machine.According to the principle of reverse design of the cam,a mathematical model is established for the cam profile curve,which is applicable to the law of the motion of the cycloidal motion curve.The displacement,velocity and acceleration theoretical curves are designed by using MATLAB software based on the law of the motion cycloidal motion curve,and in the multi body dynamics software ADAMS input model and add constraints,the dis-placement,velocity and acceleration simulation curves of the cam putter are obtained.Finally,the optimization mathematical mod-el is established to obtain the global optimal solution of the maximum pressure angle and the corresponding cam angle of the cam lift mechanism.The results show that the kinematics curve designed in MATLAB is basically consistent with the motion curve which is simulated in ADAMS,and it is proved that the kinematics curve designed by MATLAB is reasonable,optimization of the maximum pressure angle of 7.737 1 degrees,corresponding to the rotation angle of 72.298 9 degrees,the results show that the de-sign of the cam curve transmission efficiency is high,meets the technical requirements of the textile upper printing machine.So it can be seen that the design optimization is feasible and has been applied in practical production.It has a higher practical value of application.