铜包装生产线双杆曲柄滑块升降台优化设计

发布时间：2018-04-02 06:38

本文选题：双杆曲柄滑块升降台　切入点：有限元　出处：《兰州理工大学》2011年硕士论文

【摘要】：阴极铜板自动包装生产线项目是综合应用机械、电子、液压、精密计量、计算机控制等不同学科理论研制完成的全自动包装生产线。在该生产线中,上料、配重和整形三个工位用到升降平台,是生产线组成的关键设备。现场使用过程中升降台存在刚度低、变形大、动态特性不稳定等现象。本课题旨在通过对升降台承载条件下的静、动态力学性能研究,发现其薄弱环节,并进行优化改进。本文主要进行了以下工作: (1)根据升降台的工作要求,合理设计升降台的传动机构,利用0.618法优化设计了连杆和曲柄的长度,建立了升降台的机构运动简图、等效力学模型并进行了数学分析;利用PRO/E,建立了升降台的三维实体模型; (2)根据受力分析结果,得出升降台的底座和主轴受力情况相对复杂,在PRO/E中建立的三维实体模型导入有限元分析软件ANSYS中,重点对这两个核心零件进行有限元静力学分析,得到其等效位移数值和等效应力数值,提取了该条件下的等效位移、等效应力云图; (3)对底座有限元模型进行动态分析。通过模态分析,采用兰索斯法提取得到底座的前10阶固有频率、主振型图。依此为依据,选取液压缸的工作频率尽量远离底座的固有频率,使震动的危害降到最低。 (4)通过静力学分析和动态分析的数据,可对底座进一步进行优化。在有限元分析软件ANSYS中建立底座的参数化模型,运用ANSYS参数化设计语言,采用一阶法,以底座的各钢板壁厚为优化对象,以底座的体积变化为优化目标进行优化。优化后的底座体积减小了26.54%,最大等效位移较优化前增大了3mm;最大等效力为22.4 Mpa。
[Abstract]:The project of automatic packaging production line for cathode copper plate is a fully automatic packaging production line which is developed and completed by comprehensive application of mechanical, electronic, hydraulic, precision measurement, computer control and other disciplines.In this production line, feed, counterweight and shaping are used in lifting platform, which is the key equipment of production line.There are some phenomena such as low stiffness, large deformation, unstable dynamic characteristics and so on.The purpose of this paper is to find out the weak links and optimize and improve the static and dynamic mechanical properties of the lift platform under loading condition.The main work of this paper is as follows:1) according to the working requirements of the lifting platform, the transmission mechanism of the lift platform is designed reasonably, the length of the connecting rod and the crank is optimized by 0.618 method, the kinematic diagram of the lifting platform is established, the equivalent mechanical model and the mathematical analysis are carried out.The 3D solid model of lifting platform is established by using PROP / E.2) according to the result of stress analysis, it is concluded that the load of base and spindle of lift platform is relatively complex. The three-dimensional solid model established in PRO/E is introduced into the finite element analysis software ANSYS, and the two core parts are emphatically analyzed by finite element statics.The equivalent displacement value and equivalent stress value are obtained, and the equivalent displacement and equivalent stress cloud map are extracted under this condition.3) dynamic analysis of the finite element model of the base.Through modal analysis, the first 10 natural frequencies and the main mode shapes of the base are extracted by the Lanzos method.According to this, the working frequency of hydraulic cylinder is chosen away from the natural frequency of the base as far as possible, so that the damage of vibration is minimized.4) the base can be further optimized by static analysis and dynamic analysis.The parametric model of the base is established in the finite element analysis software ANSYS. By using ANSYS parametric design language, the first-order method is adopted. The thickness of each steel plate of the base is taken as the optimization object, and the volume change of the base is taken as the optimization objective.After optimization, the volume of the base decreases by 26.54, the maximum equivalent displacement increases by 3 mm, and the maximum equivalent force is 22.4 Mpa.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH211.6

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