基于ADAMS的摆式剪切机的运动学及动力学分析

发布时间：2018-05-20 14:06

本文选题：摆式剪切机 + 运动学　；参考：《内蒙古科技大学》2015年硕士论文

【摘要】：摆式剪切机是连铸连轧生产线上将薄板切断的设备，连铸连轧生产线的生产流程工艺过程复杂，多数企业选用生产流程较精确的CSP生产线，本文中要研究的摆式剪切机是引进德国的CSP薄板连铸连轧生产线上的设备。当摆式剪切机按照规定的正转（从机架侧观察）运行一段时间之后，维护人员检测到滑槽内铜板出现磨损现象，降低了薄板的剪切精度和质量，以此为背景对摆式剪切机进行研究。首先参照摆式剪切机的实体机械和装配图及零件图理清其整体组成，提取出完成剪切运动的主体构件。进而对摆式剪切机的工作原理和运行方式做合理分析，同时了解摆式剪切机的一些重要参数，掌握其与其他剪切机的异同点。其次因为摆式剪切机的构件结构比较复杂，需要在Solidworks软件中建立构件模型并装配，以Parasolid格式保存，后引入ADAMS软件中进行仿真分析。ADAMS软件是进行运动学、动力学和静力学研究的软件。ADAMS软件以多体系统动力学为基础，对机械系统进行建模、数值求解。摆式剪切机的剪切性能直接反应在剪切质量和剪切效果中，为解决其在剪切运行到一定阶段后单侧铜板严重磨损致使不能正常剪切的问题，提出调整偏心曲轴的转向为反转的方案，对比正反转运动中摆式剪切机的运动特性和动力特性。最后在ADAMS中先设置各种参数，施加约束副。根据生产实践中的驱动设置仿真构件的驱动，，该摆式剪切机有两个动力件，需对偏心曲轴和液压缸设置驱动。分析摆式剪切机正转方向的运动学，测出各构件的运动状态及剪切性能。改变偏心曲轴的转向为逆时针反转，对比分析各构件正反转的运动转态和剪切性能。从运动学方向做了分析后，修改仿真模型的约束副，使之符合动力学研究条件。理论上分析出剪切机剪刃的剪切力，运动过程中施加在剪刃上。并对曲轴和摆架接触位置施加接触力，分析各构件的受力变化。对不同间隙对接触力的影响分别作正反转研究，再对比二者之间的差异，从而得出调整偏心曲轴对摆式剪切机剪切性能的影响。本文通过对摆式剪切机的探讨及正反转对摆式剪切机运动学和动力学各方面的影响做分析比较，了解到改变偏心曲轴转向后不会降低摆式剪切机的剪切质量，各构件受到的力及曲轴与摆架的接触力影响微小，因而转向的调整可以起到改善铜板一侧磨损的作用。
[Abstract]:The tilting shearing machine is the equipment to cut off the thin plate in the continuous casting and rolling production line. The production process of the continuous casting and rolling line is complex, and most enterprises choose the CSP production line with more accurate production process. The pendulum shearing machine studied in this paper is the equipment of CSP thin plate continuous casting and rolling production line imported from Germany. When the tilting shearing machine runs in accordance with the prescribed positive rotation (observed from the side of the rack) for a period of time, the maintainer detects the wear phenomenon of the copper plate in the chute, which reduces the shearing accuracy and quality of the thin plate. Based on this background, the tilting shearing machine is studied. Firstly, according to the mechanical and assembly drawings and parts drawing of the pendulum shearing machine, the whole components are sorted out, and the main components that complete the shearing motion are extracted. Then the working principle and operation mode of the pendulum shearing machine are analyzed reasonably. At the same time, some important parameters of the pendulum shearing machine are understood, and the similarities and differences between the tilting shearing machine and other shears are grasped. Secondly, because the component structure of pendulum shearing machine is complex, it is necessary to set up component model and assemble it in Solidworks software, save it in Parasolid format, and then introduce ADAMS software to simulate analysis. Adams software is used for kinematics. The software of dynamics and statics. Adams software is based on the dynamics of multi-body system. The mechanical system is modeled and solved numerically. The shear performance of the pendulum shearing machine is directly reflected in the shear quality and shear effect. In order to solve the problem that the unilateral copper plate can not be shearing normally due to serious wear after the shear operation to a certain stage. A scheme of adjusting the steering of eccentric crankshaft as inversion is proposed, and the kinematic and dynamic characteristics of the pendulum shearing machine in the positive and inverse motion are compared. Finally, a variety of parameters are first set in the ADAMS, and the constraint pair is applied. According to the driving and setting of simulation component in production practice, the pendulum shearing machine has two power parts, which need to be driven by eccentric crankshaft and hydraulic cylinder. The kinematics of the forward turning direction of the pendulum shearing machine is analyzed, and the motion state and shear performance of each component are measured. By changing the eccentric crankshaft turning into counterclockwise inversion, the kinematic and shear behavior of each component is compared and analyzed. After the kinematics analysis, the constraint pair of the simulation model is modified to meet the dynamic research conditions. The shear force of the shear blade is analyzed theoretically and applied to the cutting edge during the movement. The contact force is applied to the contact position of crankshaft and pendulum, and the force change of each component is analyzed. The influence of different clearance on contact force is studied and the difference between them is compared. The influence of adjusting eccentric crankshaft on shear performance of pendulum shearing machine is obtained. Through the discussion of the pendulum shearing machine and the analysis and comparison of the effect of the forward and backward rotation on the kinematics and dynamics of the pendulum shearing machine, it is found that the shear quality of the pendulum shearing machine will not be reduced by changing the eccentric crankshaft steering. The force of each component and the contact force between crankshaft and pendulum have little effect, so the adjustment of steering can improve the wear of one side of copper plate.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG333.21

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