刀具半径补偿在数控加工中的应用

阐述了如何灵活和合理地运用刀补值，并结合刀补原理正确编制加工程序，以保证数控加工的有效性和准确性。     

NURBS output based tool path generation for freeform pockets

A robust method is proposed to generate tool paths for NURBS-based machining of arbitrarily shaped freeform pockets with islands. Although the input and output are all of higher-degree NURBS curves, only one simple category of geometric entities, i.e., line segments, is required for initial offsetting and for detecting and removing self-intersecting loops. Furthermore, using those linear non-self-intersecting offsets as the legs of NURBS control polygons, NURBS-format tool paths can be smoothly reconstructed with G¹-continuity, no overcutting, no cusps, and global error control. Since all operations involved in computing tool path curves are linear geometric calculations, the method is robust and simple. Examples with integrated rough and finish cutting tool paths of pockets demonstrate the usefulness and effectiveness of this method.     

加工中心的高速化及其应用

1 高速化——加工中心的基本发展趋势 加工中心是数控机床进一步发展的产物,是现代机械加工车间最重要的生产设备之一。随着柔性自动化技术的发展,加工中心上加工零件的辅助工时大为缩短,辅助工时在加工零件的总工时中所占的比例很小。在这     

工程陶瓷材料加工技术的研究进展

简要综述了近年国内外关于陶瓷材料加工技术方面取得的研究进展。包括工程陶瓷材料难加工的理论基础研究，磨削机理，超精密磨削，高效磨削加工等方面的研究动态。     

电熔爆技术发展现状及展望

简述电熔爆技术的基本工作原理 ,介绍该技术目前的发展状况及技术应用领域以及有待于解决的关键技术问题 ,展望了该技术的发展前景     

特种加工技术在精密制造中的应用

简要介绍现代制造技术中特种加工技术的一些应用现状和目前达到的水平,说明特种加工技术是精密机械加工不可或缺的补充手段.     

Theoretical and experimental analysis on super precision grinding of monocrystal silicon

Through investigating the diamond-silicon grinding system, the grinding mechanism, including chip removal and subsurface damage, is discussed with the aid of the molecular dynamics (MD) approach and grinding experiments. Based on MD simulation, nanometric-grinding mechanism is analyzed from the viewpoint of instantaneous distribution of atoms, grinding force, and the potential energy between atoms and the profile of the groove. The simulation results show that some silicon atoms are deformed and piled up in front and on two sides of the abrasive surface because of the extrusion and cutting. When the energy in silicon lattice reaches its maximum value, the bonds of silicon atoms are broken and the material is removed. With the advancement of the abrasive, the silicon lattice under the abrasive surface is fractured, and then the amorphous layers are formed and propagated, which causes the subsurface damage. At the same time, some amorphous atoms are reconstructed and the degenerating layer of the machined surface is formed. Besides, the recovery of elatstic deformation occurs in the machined surface of the workpiece. In addition, the grinding experiment and profile detection with the aid of the measurement for 3D profiling are performed to verify the simulation results. The good agreement in the profile of the groove between the experimental value and the simulating value shows that MD simulation is very effective and reliable, and successful to fulfill the investigation on nanometric machining mechanism.     

基于后刀面磨损的铣削加工误差研究

对铣削加工过程中后刀面磨损对加工精度的影响进行了分析和研究,建立了基于刀具后刀面磨损的铣削加工误差的数学模型。     

CNC机床故障分析及其可靠性

对６台ＣＮＣ机床进行现场跟踪实验研究，对故障数据的分布规律进行探讨，为可靠性考核提供理论依据，在对故障进行统计分析的基础上，提出了可靠性增长的方向。     

基于啮合分析的圆柱凸轮共轭加工研究

针对圆柱凸轮的共轭加工方式,利用共轭曲面原理分析了４类圆柱凸轮机构的滚子接触线特性,得出了圆柱凸轮廓面是不可展曲面的结论．在此基础上,认为圆柱凸轮廓面在理论上只有用等径刀具才能精确加工,非等径刀具只能近似加工,并讨论了等径加工的合理方法以及非等径加工的研究方向．通过对凸轮机构的啮合分析来考虑凸轮廓面的加工问题,有助于弄清凸轮加工的机理,改进凸轮产品的加工质量．