用户名: 密码: 验证码:
平面凸轮设计及运动仿真系统的研究
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
针对机构学领域发展趋势和当前实际需求,建立了新的平面凸轮设计理论模型,并在此基础上研制了平面凸轮设计及运动仿真系统,为凸轮设计提供了更通用、简便的方法,确保从动件实现特定运动规律或特定轨迹。
     论文基于高副低代原理,将平面凸轮机构设计与再现函数的平面连杆机构设计统一为同一种方法,运用圆向量函数建立代换机构的位移、速度、加速度矢量方程式,求取虚拟连杆杆长和方向,由此展开凸轮理论廓线、实际廓线、曲率半径和压力角的求解,并得出用圆形刀具加工凸轮时刀具中心的轨迹方程。针对实现特定轨迹的凸轮一连杆组合机构设计问题,文中首先选取轨迹上有代表性的节点,采用样条插值法绘出光滑的轨迹曲线,进而具体分析从动件的位移、类速度、类加速度,最后对凸轮-连杆组合机构进行设计。
     系统运用VB6.0以及相关接口函数构建了良好的人机交互界面,实现运动特性曲线绘制、数据文档的输出以及机构的运动仿真;基于ActiveX技术调用AutoCAD中对象,实现了凸轮廓线的图形绘制。该系统针对平面凸轮机构、凸轮-连杆组合机构中的凸轮进行设计,可应用于工程模拟、设计和计算机辅助教学。
Based on the analysis of the advance treads in the field of mechanics and the practical requirement, a new planar cam design theory model was proposed. And then using the new model, the planar cam design and simulation system were developed. It provided a more general and simple method for cam designs, and could ensure the follower follow the special movement rule or the special track.
    In the paper, based on the method of low pair replacing with high pair, the problem of cam design was transferred to that of linkage design. By means of rotary unit vectors, the equations of displacement, velocity and acceleration of the replacement mechanisms were developed. And then, the virtual linkage's length and direction were deduced. Based on that, the theoretical and practical cam profile, curvature radius and pressure angle were calculated. Then the center's track equation of the circular cutter which was used to manufacture the cam was presented. For the problem of designing on combined cam mechanism which follows the given track, typical nodes in the track were selected at first. Then the spline interpolation method was employed to plot the smooth track. Finally, the combined cam mechanism was designed. This method could avoid the input of many trace points, and decrease the work times.
    Using VB6.0 and related interface functions, a user-friendly interface of the design and dynamic simulation system of cam mechanism was developed. It could plot the track of the movement, produce the related documents and simulate the cam movement dynamically. By using ActiveX techniques to call the objects in AutoCAD software, the cam profile could be plotted interactively, the system could used to design the cam for planar and combined cam mechanisms in the fields of engineering simulation, design, and computer aided instruction(CAI).
引文
[1] 邹慧君,董师予.凸轮机构的现代设计.上海:上海交通大学出版社,1991:87~152
    [2] 赵韩,丁爵曾,梁锦华.凸轮机构设计.北京:高等教育出版社,1993
    [3] 彭国勋,肖正扬.自动机械的凸轮机构设计.北京:机械工业出版社.1989:82~95
    [4] 石永刚,徐振华.凸轮机构设计.上海:上海科学技术出版社,1995
    [5] 姚海蓉 张云文.机械原理教学体系的框架重构,教育教学改革实践与探索.北京:中国农业大学出版社2003:135~137
    [6] 高英敏.平面连杆机构多媒体分析系统的研究.北京:中国农业大学[硕士学位论文],2003.9
    [7] 葛正浩,冯涛,澎国勋.可以任意增加局部控制条件的凸轮机构通用多项式运动规律,机械科学与技术,1998,17(6):986~987
    [8] K Yoon, S S Rao. Cam motion synthesis using cubic splines. Trans. AS ME, J. Of Mech. Des., 1993, 115 (9)
    [9] 葛正浩,杨芙莲,彭国勋等.凸轮机构运动学研究综述.机械设计,2001,(3):4~5
    [10] 申永胜,机械原理基础教程.北京:清华大学出版社,1999:80~107
    [11] 孙恒,傅则绍.机械原理.北京:高等教育出版社,1989:338~367
    [12] 高慧琴,谢江,郑文林等.基于图解法的凸轮廓线CAD设计.河北工业科技,2004,(1):14~15
    [13] 曹晓明,张云飞.Auto CAD在图解法中的应用.机械设计与研究.2003,(5):19~21
    [14] 叶仲和.用瞬心法求滚子摆动从动件圆柱凸轮机构压力角和最小平均圆柱半径.机械科学与技术,1996,(2):191~194
    [15] 吴炎辉,李刚炎,杨明忠等.凸轮轮廓设计的速度瞬心法.机械科学与技术,1998,(3):397~398
    [16] Shin J H, Lee C M, Kim J S. Shape design of disk cam mechanisms using instant velocity centers. In: Proceedings of 6th international Symposium on Transport Phenomena and Dynamics of Rotating Machinery, 1996:178~186
    [17] Fan Y Chen. Mechanics and Design of Cam Mechanisms. New York: Pergamon Press Inc,1992
    [18] Tsay D M. Wei H M. A general approach to determination of planar and spatial cam profiles. ASME Journal of Mechanical Design, 1996,118(1):259-265
    [19] 何有钧,邹慧君,郭为忠等.圆柱滚子从动件凸轮廓面的等距曲面设计方法.上海交通大学学报,2000,(10):1336~1337
    [20] 张玉华,徐致让,包家汉等.确定盘形凸轮曲率半径的相对加速度法及其应用.安徽工业大学学报,2003,20(4):303~307
    [21] 张玉华,辛重镐.设计平面凸轮轮廓的新方法.机械工程学报,2004,(1):33~374
    [22] 吴天星,周美立.平面凸轮机构与平面四杆机构压力角特性相似性研究.现代机械,2003,(3):47~48
    [23] 胡爱萍,沈惠平.用高副低代法快速求解偏心轮凸轮机构最大压力角.江苏石油化工学院学报,2002,(2):1~3
    
    
    [24] 胥光申.直动从动件盘形凸轮廓线曲率半径的确定.机械设计,2000,(6):14~15
    [25] 冯志华,胡海岩.高速机构动力学研究进展.力学进展,2002,(2):196~204
    [26] 唐少雄,马力,杨代华等.内燃机凸轮机构摩擦学仿真设计建模研究.内燃机工程,2002,(6)
    [27] 孙均强.滚子直动盘形凸轮的优化设计.上海铁道大学学报,1998,(6):63~66
    [28] 赵丽颖.平面凸轮CAD/CAPP/CAM集成系统的研制.西安:西安理工大学[硕士学位论文]2000
    [29] 茅健.共轭凸轮机构CAD/CAM软件系统开发研究.西安:西安理工大学[硕士学位论文]2002
    [30] 余蔚荔.二维与三维凸轮CAD/CAM系统的研究与开发.广州:广东工业大学[硕士学位论文],2003
    [31] 黄安清.柔性化平面凸轮机构CAD/CAM集成系统的研究.广州:广东工业大学[硕士学位论文],2003
    [32] 郑俊峰.面向公差的凸轮机构设计理论与应用研究.武汉理工大学[硕士学位论文],2003
    [33] 张志成,李克天,区锐相.凸轮CAD/CAM软件的设计与开发.精密制造与自动化.2003,(3):43~45
    [34] 白海清.盘形凸轮CAD/CAM系统.陕西工学院学报.2001,(4):4~6
    [35] 董学朱.齿轮啮合理论基础.北京:机械工业出版社,1989:1~30
    [36] 张晋西 用凸轮连杆组合机构精确实现轨迹机械设计与制造工程,2001.6:12~16
    [37] 丁丽娟.数值计算方法.北京:北京理工大学出版社,1997:112~118
    [38] 郜焕平,马希荣.Visual Basic 6.0程序设计.北京:北京大学出版社,2000
    [39] visual Basic编程精选集锦北京:科学出版社2003:401~408
    [40] 刘炳文,李风华.Visual Basic6.0 Win32 hPI北京:清华大学出版社,2001:267~313
    [41] 王文奎,陆雨田,胡企铨.用VB6.0实现曲柄连杆机构在AutoCAD中的仿真.机械设计与制造.2001,4:11~12

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700