抛光磨头凸轮轮廓设计与运动仿真

发布时间：2018-04-14 01:09

本文选题：抛光磨头 + 圆柱端面凸轮　；参考：《哈尔滨理工大学》2011年硕士论文

【摘要】：抛光磨头是瓷质砖抛光机上的核心部件,其性能优劣直接影响到抛光砖的加工质量和生产效率。随着我国房地产业的迅猛发展、国民生活水平的提高以及国际化建材市场竞争的日益激烈,无论是对抛光砖的产量还是质量都提出了更高的要求。所有的这一切都需要提高国产抛光机的质量才能得以实现。目前,国产抛光机设备主要存在着抛光磨削加工过程中碎砖现象严重,加工噪音大等缺陷,尤其是抛光磨头更存在凸轮局部磨损现象严重,摆杆运动精度低以及返修率高等问题。如何提高抛光机,尤其是抛光磨头的工作性能,提高国产抛光机设备以及抛光砖的国际竞争力已经是摆在我们面前迫切需要解决的问题。在实际调研和查阅大量的相关资料的基础上,本文以瓷质砖抛光机的抛光磨头为研究对象,对其凸轮摆杆机构展开重点研究分析,针对其端面圆柱凸轮轮廓的研究采用将圆柱凸轮展开成平面凸轮的方法,利用坐标变换的原理,计算出其1/6段理论轮廓曲线与实际轮廓曲线点坐标表达式,并在MATLAB中计算轮廓采样点处的坐标值、绘制凸轮轮廓曲线以及输出采样点处的坐标,从而利用采样点凸轮轮廓坐标在SolidWorks中建立凸轮三维模型,并完成抛光磨头其它零件的建模与装配。而针对采用将圆柱凸轮展开成平面凸轮计算凸轮轮廓所存在的误差问题,通过在ADAMS中模拟摆杆和凸轮的实际运动情况,并测量在运动仿真过程中凸轮因误差而上下浮动的数值,从而对凸轮轮廓曲线进行修正。最后,利用修正后的轮廓线建立凸轮的三维模型以及凸轮摆杆机构模型,并进行运动仿真分析。从仿真得出的摆杆运动规律图来看,摆杆的运动规律与理论设计基本相符,从而证明了采用此种方法来设计空间凸轮轮廓曲线的正确性。本文的研究为设计端面圆柱凸轮轮廓提供了一种新的思路,同时在今后对抛光磨头结构的研究以及优化方面也具有重要的参考价值。
[Abstract]:Polishing head is the core part of ceramic tile polishing machine. Its performance directly affects the quality and production efficiency of polished tile.With the rapid development of China's real estate industry, the improvement of national living standards and the increasingly fierce competition in the international building materials market, both the output and quality of polished tiles are required to be higher.All this needs to improve the quality of domestic polishing machine can be achieved.At present, the equipment of domestic polishing machine mainly has some defects, such as broken bricks in the process of polishing and grinding, high noise and so on. Especially, the local wear phenomenon of cam is more serious in polishing grinding head.The precision of swing rod motion is low and the repair rate is high.How to improve the working performance of polishing machine, especially the polishing head, and how to improve the international competitiveness of domestic polishing machine equipment and polishing tile are the urgent problems that need to be solved in front of us.Based on the actual investigation and reference of a large number of related materials, this paper takes the polishing and grinding head of the ceramic tile polishing machine as the research object, and focuses on the research and analysis of the cam swing rod mechanism.In view of the research on the profile of the cylindrical cam on the end face, the method of expanding the cylindrical cam into a plane cam is adopted. By using the principle of coordinate transformation, the coordinate expressions of the theoretical contour curve of 1 / 6 segment and the point coordinate expression of the actual contour curve are calculated.At the same time, the coordinate value of the contour sampling point is calculated in MATLAB, the cam contour curve is drawn and the coordinate at the output sampling point is drawn, and the cam 3D model is established in SolidWorks by using the cam contour coordinate of the sampling point.And finish polishing the other parts of the grinding head modeling and assembly.Aiming at the error problem of using cylindrical cam to expand into plane cam to calculate cam contour, the actual motion of pendulum rod and cam is simulated in ADAMS, and the value of cam floating up and down due to error in motion simulation is measured.Thus the cam contour curve is corrected.Finally, the three dimensional model of cam and the model of cam swing rod mechanism are established by using the modified contour line, and the kinematic simulation analysis is carried out.The simulation results show that the motion law of the pendulum rod is basically consistent with the theoretical design, which proves the correctness of this method in designing the contour curve of the spatial cam.The research in this paper provides a new way to design the profile of cylindrical cam with end face, and also has important reference value in the research and optimization of polishing grinding head structure in the future.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.47

【引证文献】