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弧面凸轮数控加工的算法研究-高占华-2008

2013年06月17日 11:52 高占华 点击:[]

 

 作者姓名  高占华
 中文论文题名  弧面凸轮数控加工的算法研究
 外文论文题名  RESEARCH ON NUMERICAL CONTROL PROCESSING ALGORITHM OF GLOBOID CAM
 论文提交日期  2008-05-05
 学位年度  2008
 中文论文关键词  弧面分度凸轮;数控加工;运动规律反求;逐点坐标变换
 外文论文关键词  globoid indexing cam;Numerical control processing; anti-programming of follower motion specification; coordinate parallel move method point by point

 

中文论文文摘


    本文以弧面分度凸轮为研究对象,从工程实际出发,以微分几何和空间啮合理论为工具,对弧面凸轮的啮合原理、从动件的运动规律反求方法及凸轮的数控加工方法进行了深入的理论分析和研究。
    弧面分度凸轮机构是实现高速、高精度间歇分度运动的新型传动装置,广泛应用于各种自动机械的间歇转位机构及自动生产线的步进输送机构中。弧面凸轮分度机构制造的关键是弧面凸轮的加工,数控技术的发展以及制造模式的转变。
详细探讨了弧面凸轮机构从动件运动规律反求问题。为克服弧面凸轮运动段曲面加工时进给量随机构运动速度加快而过量增大问题,进行反求运动规律的算法研究,实现了实际进给量的均匀进给。
    根据弧面凸轮机构空间啮合曲面的特点,分析现行范成法加工过程中的空间限制和干涉问题,以及工件偏离中心安装的问题,提出了“逐点坐标平移法”的编程算法,用以消除工件偏离中心安装,减小空间限制和干涉。最后,以此作为理论基础,采用Visual C++ 6.0作为开发工具,编制了弧面凸轮轮廓面加工软件。
基于上述弧面凸轮轮廓设计方法、运动规律反求方法的研究结论,分别进行了验证及分析,结果表明,上述方法正确可行。证明了本文所提出的理论及方法的正确性,具有重要的理论意义和实际应用价值。

 

外文论文文摘


    Focusing on the globoid indexing cam, the dissertation, starting with the practical processing, analyzes and researches the meshing theory of globoid index cam, the reverse design of follower motion specifications and numerical control of cam profile deeply by differential coefficient geometry and special meshing theory.
    Globoid indexing cam is a new gearing to achieve high speed and high degree of accuracy indexing motion. It is extensive used in various kinds of automatic mechanism interval dislocation mechanism and stepping moving institution of automatic production line. The key of manufacturing globoid indexing cam mechanism is the processing of globoid cam, the development of NC technique and the change of manufacturing mode.
    The reverse design of follower motion specification for globoid indexing cam mechanisms is studied in detail. Research on anti-programming of follower motion specification in order to overcome the problem that cutting feed excess accretion following institution movement velocity when processing curved surface, And finally achieved well-distributed of actual cutting feed.
    Based on the characteristic of spatial meshing curved surface of globoid cam mechanism, analyzing special limitation and interfere problem in active processing and departure center installation of work piece, programming arithmetic named “coordinate parallel move method point by point” is raised to eliminate departure center installation of work piece and minis special limitation and interfere. At last, based on this theory, a processing program for globoid cam profile is programmed using Visual C++ 6.0.
    Based on the achievement of the design of globoid cam profile, the reverse method of motion specifications, each experiment and analysis are done. The results show that this technology is correct and feasible. Thereby, the theory and methods proposed in this dissertation are correct and have important theoretical and actual value.

    

 

 

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