摘要
对机械压力机的平面六杆机构摆动力部分平衡后的动力学性能进行计算与分析比较,以验证摆动力部分平衡的优势。首先,利用矢量法分析了机构的位移、速度和加速度曲线;其次,运用牛顿-欧拉法建立了该机构的动力学方程,并得到该机构的驱动力矩及运动副内约束反力的理论计算公式;最后,针对机构摆动力部分平衡前后因构件质量和质心的变化引起的驱动力矩及运动副内约束反力的变化,分别进行了编程计算。结果表明:曲轴驱动力矩的最大波动减少了1.8713%,而曲轴支撑处约束反力在x、y方向上的最大波动分别减少了2.5013%、4.0707%,其余运动副内的约束反力几乎无变化,从而验证了机械压力机机构摆动力部分平衡优化的有效性及优势。
The calculation and comparative analysis on the dynamic performance of planar six-bar mechanism for mechanical press after partial balancing of swing force were conducted to verify the advantages of partial balancing of swing force.Firstly,the displacement,velocity and acceleration curves of the mechanism were analyzed by vector method,then the dynamics equation of the mechanism was established by Newton-Euler method to obtain the theoretical calculation formulas for driving torque and constraint reaction force in the kinematic pair of the mechanism.Finally,the changes in driving torque and constraint reaction force in the kinematic pair caused by the changes in component mass and center of mass before and after partial balancing of swing force for the mechanism were programmed and calculated separately.The results show that the maximum fluctuation of crankshaft driving torque is reduced by 1.8713%,while the maximum fluctuations of the constraint reaction force at the crankshaft support in the x and y directions are 2.5013%and 4.0707%,respectively.The constraint reaction forces in other kinematic pairs remained almost unchanged,thus verifying the effectiveness and advantages of the optimization on the partial balancing of swing force for the mechanical press mechanism.
作者
孔祥超
沈惠平
李霞
张清林
江秀花
司大强
尤佳琪
于勇涛
Kong Xiangchao;Shen Huiping;Li Xia;Zhang Qinglin;Jiang Xiuhua;Si Daqiang;You Jiaqi;Yu Yongtao(Research Center of Advanced Mechanism,Changzhou University,Changzhou 213016,China;Jiangsu Xingduan Intelligent Equipment Technology Co.,Ltd.,Liyang 213300,China)
出处
《锻压技术》
北大核心
2025年第2期195-203,共9页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(52375007)。
关键词
压力机
摆动力部分平衡
运动学
动力学
驱动力矩
运动副
press
partial balancing of swing force
kinematics
dynamics
driving moment
kinematic pairs
