摘要
针对双锻造操作机吊挂系统在传统刚性假设无理论解的情况,以两台2 t锻造操作机为研究对象,考虑高温锻件的弹性变形和液压系统的刚度,提出和建立了一种双锻造操作机吊挂系统刚柔耦合模型,分析了局部刚度随特征参数的变化规律,研究了刚柔耦合作用对双锻造操作机吊挂系统夹持端运动规律的影响。结果表明:锻件刚度随着弹性模量的下降呈下降趋势,相同弹性模量下,锻件在Y方向上容易产生变形;蓄能器不参与工作时,液压刚度为2.85×10^(8)N/m;蓄能器参与工作时,液压刚度范围为6.7×10^(5)~7.8×10^(5)N/m;若缓冲系统不存在时,双操作机同步提升轨迹对称分布,对锻件产生拖拽行为;当缓冲系统存在且不论蓄能器是否参与工作,同步提升轨迹平行分布,拖拽消失。
Considering the lack of a theoretical solution for the traditional rigid assumption in the hanging system of dual forging manipulators,this study uses two 2-ton forging manipulators as research objects.It proposes and establishes a rigid-flexible coupling mechanism model of the hanging system,taking into account the elastic deformation of high-temperature forgings and the stiffness of the hydraulic system.The study analyzes the variation of local stiffness with characteristic parameters and examines the effect of the rigid-flexible coupling on the motion behavior at the clamping end of the dual forging manipulators hanging system.The results show that the stiffness of the forging decreases with a decline in the elastic modulus,and under the same elastic modulus,the forging tends to deform in the Y direction.When the accumulator is not engaged,the hydraulic stiffness is 2.85×10^(8)N/m.When the accumulator is engaged,the hydraulic stiffness ranges from 6.7×10^(5)~7.8×10^(5)N/m.If the buffer system is absent,the synchronous lifting trajectories of the dual manipulators are symmetrically distributed,causing dragging on the forging.When the buffer system is present,regardless of whether the accumulator is engaged,the synchronous lifting trajectories are parallel,and the dragging disappears.
作者
王晓楠
翟富刚
何志强
邢杨涛
赵艳凤
仇平
WANG Xiaonan;ZHAI Fugang;HE Zhiqiang;XING Yangtao;ZHAO Yanfeng;QIU Ping(School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004;Hebei Innovation Center for Equipment Lightweight Design and Manufacturing,Qinhuangdao,Hebei 066004)
出处
《液压与气动》
北大核心
2024年第12期54-62,共9页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(52175064)
国家科技重大专项(2024ZD0712201)。
关键词
双锻造操作机
吊挂系统
液压刚度
刚柔耦合
dual forging manipulators
hanging system
hydraulic stiffness
rigid-flexible coupling
