利用电流变液双电极复合结构改变切削系统特性的研究

针对轴类工件切削颤振的特点 ,对所设计的一种电流变液双电极复合结构切削颤振抑制装置 ,通过静加载实验和激振实验分别对其静态和动态特性进行了实验研究和理论分析 ,证明这种结构可以用于车削颤振抑制     

外圆车削表面纹理建模与仿真分析

提出了一种描述外圆车削加工表面纹理的建模方法，考虑刀尖圆弧半径、进给速度以及刀具一工件之间的相对振动等因素，并通过Matlab软件进行仿真，直观地反映出零件表面纹理的变化规律。     

车削中心刀具磨破损的监控

论述了用主轴切削电流作为监控参量，采用自学习法对车削中心进行刀具磨破损监控的技术。     

关于逆向车削加工细长轴误差的力学分析

针对细长轴车削加工，分别在两种不同装夹条件下(一端卡盘夹紧、一端顶尖支承和两端顶尖支承)进行正向切削和逆向切削时的工件变形进行了力学分析，建立了正逆向切削工件在切削力作用下产生弯曲变形的解析模型。具体算例表明：逆向切削时工件的弯曲变形以及由此引起的加工误差远小于同等条件下正向切削的变形和误差。该模型及分析结果可用于细长轴加工的工艺设计。     

Self-organizing fuzzy control of constant cutting force in turning

Constant force control is gradually becoming an important technique in the modern manufacturing process. Especially, constant cutting force control is a useful approach in increasing the metal removal rate and the tool life for turning systems. However, turning systems generally have nonlinear with uncertainty dynamic characteristics. Designing a model-based controller for constant cutting force control is difficult because an accurate mathematical model in the turning system is hard to establish. Hence, this study employed a model-free fuzzy controller to control the turning system in order to achieve constant cutting force control. Nevertheless, the design of the traditional fuzzy controller (TFC) presents difficulties in finding control rules and selecting an appropriate membership function. Moreover, the database and fuzzy rules of a TFC are fixed after the design step and then cannot appropriately regulate ones real time according to the system output response and the desired control performance. To solve the above problem, this work develops a self-organizing fuzzy controller (SOFC) for constant cutting force control to evaluate control performance of the turning system. The SOFC continually updates the learning strategy in the form of fuzzy rules, during the turning process. The fuzzy rule table of this SOFC can be begun with zero initial fuzzy rules which not only overcome the difficulty in the TFC design, but also establish a suitable fuzzy rules table, and support practically convenient fuzzy controller applications in turning systems control. To confirm the applicability of the proposed intelligent controllers, this work retrofitted an old lathe for a turning system to evaluate the feasibility of constant cutting force control. The SOFC has a better control performance in constant cutting force control than does the TFC, as verified in experimental results.     

W-Fe-Ni合金车削残余应力正交试验研究

采用极差分析法分析基于正交试验的W-Fe-Ni合金车削试验结果。结果表明:加工表面切向残余应力为拉应力,其主要影响因素是切削深度;轴向残余应力为压应力,其主要影响因素是进给量。并讨论了获得较小车削表面残余应力的合理切削条件。     

城市设计与建筑空间形态--北京世纪城市

单体建筑应嵌入城市的节点，为所在城市整体环境做出贡献。建筑空间形态设计更应从所在城市片断中寻找创作契机，在设计表达中需要经历理性分析与感性升华两个相互交织的过程。     

高锰钢的研究与应用进展

综述了高锰钢研究与应用的进展,重点介绍了高锰钢的成分设计、组织性能、铸造、热处理及车削加工的研究进展。     

影响工件车削加工质量的因素分析

为提高工件车削加工表面质量,解决振动和切削条件对工件表面粗糙度的影响,通过对加工误差影响因素与影响工件表面粗糙度的因素分析,得到了产生加工误差与影响工件表面粗糙度的因素的原理图,试验得到表明对于刀尖带有圆弧的车刀,当进给量较大时,理论粗糙度与实际加工粗糙度比较接近的结论。     

基于切削力的模糊PID控制器的设计与仿真

针对硬态切削过程中径向力较大的特点,采用MATLAB仿真工具设计了切削力模糊PID控制系统,并对该系统进行了恒力控制,分析了它的性能和精度.