摘要
为了提高平面运输设备的传送效率与定位精度,针对x‑y轴平面滚珠丝杠副的多机械装配界面,应用吉村允效法确定螺栓联接界面的法向压缩刚度和切向运动刚度,采用赫兹接触理论确定丝杠螺母、轴承和导轨内接触界面的径向或法向压缩刚度。基于ABAQUS软件建立x‑y直线进给系统的动力学模型,通过锤击法模态试验和文献对比研究,证明了所提理论模型以及结合面刚度计算的正确性。数值仿真了工作台质量、滑块间距及导轨间距对于系统动态行为的影响,并给出设计建议值。通过医疗剪刀毛坯平面进给机床设计试验,验证了所获得动态系统设计规律的有效性。
Aiming to improve the transmission efficiency and positioning accuracy of the plane transportation equipment,the normal compression stiffness and tangential motion stiffness of bolt connection interface are determined by using Takashi Yoshimura method for the multi-element assembly interface in x-y axis plane ball screw pair.Hertzian contact theory is used to determine the radial or normal compression stiffness of the contact interface for screw nut,bearing and guide rail.The dynamic model of x-y linear feed system is established based on ABAQUS software.Modal test with hammering method and comparison of literature verify the correctness of the theoretical model and the calculation of the joint surface stiffness in this paper.The influences of the changes of the worktable quality,the distance between the sliding blocks and the distance between the guide rails on the dynamic characteristics of the plane feed system are studied using numerical analysis methods.More-over,the design parameters are recommended.The design example of a plane feeding machine tool for medical scissors material verifies the validity of the obtained dynamic system design rules.
作者
李中凯
孙冉
邹光宇
LI Zhongkai;SUN Ran;ZOU Guangyu(School of Mechatronics Engineering,China University of Mining and Technology Xuzhou,221116,China;Xuzhou WIKA Electronic Control Technology Co.,Ltd.Xuzhou,221009,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2023年第5期960-966,1040,1041,共9页
Journal of Vibration,Measurement & Diagnosis
基金
江苏高校优势学科建设工程资助项目(PAPD)。
关键词
滚珠丝杠
平面进给系统
结合面建模
动态特性
ball screw
plane feed system
joint surface modeling
dynamic characteristics
