精密定位技术在等离子显示器精密对板中的应用

介绍了一种等离子显示器的自动精密检测定位装置.采用激光莫尔信号进行高精密位置检测.工控机根据检测到的莫尔信号发出控制脉冲给步进电机,驱动工作台,实现等离子体显示器基板之间的全自动精密定位.控制系统采用了多线程,采用Visual Basic制作软件平台界面,通过Borland C++编写信号采集、定位控制、设备驱动、数据管理等功能模块,完成系统的精密定位,定位精度可达±1μm.

镍铝青铜表面腐蚀损伤精密脉冲等离子粉末堆焊修复可行性研究

9-4-4-2以镍铝青铜合金板材为研究对象,配用与其成分相近的合金粉末进行了铸态铜合金精密脉冲等离子粉末堆焊探索性试验,从宏观形貌、显微组织、显微硬度、残余应力和耐腐蚀性能等各方面对堆焊层进行了评价,探讨了使用该技术修复舰船螺旋桨等铜质装备零部件表面腐蚀损伤的可行性。研究结果表明:精密脉冲等离子粉末堆焊能够在镍铝青铜合金表面制备出连续均匀、组织致密的堆焊层,堆焊层残余应力较小,耐腐蚀性能、硬度满足生产要求,可应用于装备制造、修复螺旋桨等零部件的表面腐蚀损伤。

钢轨变形在线修复问题研究

针对铁路钢轨肥边切割和钢轨硬度、强度高属于难切削材料的情况,分析几种钢轨在线加工方法,提出利用精密等离子弧切割钢轨肥边的方法,并通过精密等离子弧与普通等离子弧切割钢轨技术的比较,精密等离子弧的工作原理、加工速度、精度、经济性等方面的研究,证明此加工方法是可行的。

有效改善车桥的功效

大众Touareg轿车和保时捷Cavenne轿车的车桥采用了新的技术．从而使车桥的功效得到了进一步的改善。KuKa公司研制出了改善车桥功效的种种生产设备／技术．可以说．此类生产设备/技术具有革新的意义。采用此类设备／技术可使生产的汽车车桥的热输入值降至微乎其微。例如．精密等离子切削便是此类生产设备／技术中所采用的一种。

Microstructural study of the ablation behaviors of 3D fine weave pierced Carbon/Carbon composites using plasma torch at ultra-high temperature

A simple and effective method of testing ablation behaviors of carbon/carbon composites at high temperature was provided, which used plasma torch as the heater. The ablation resistance of 3D fine weave pierced carbon/carbon composites at high temperature was also studied. The results show that temperature of the plasma flame is very high which is much closer to the real work environment of carbon/carbon composites. The factors that affect the ablation characters of carbon/carbon composites depend on both the properties of their components and the environmental conditions in which the material is placed. The ablation behaviors of C/C composites change from the center flame region predominantly influenced by sublimation of graphite to the region close to the outer flame influenced mainly by oxidization of graphite. The sublimation ability of carbon matrix is equal to that of carbon fibers but the oxidization ability of carbon fibers is significantly enhanced compared to that of carbon matrix.