Deform Analysis on Fixture for Peripheral Grinding of Indexable Inserts

在高速精密磨削可转位刀片周边时,由于采用双顶尖油压夹紧刀片,再通过在刀片上产生的摩擦力和油压力来约束刀片的6个运动自由度,造成夹具结构刚性相对薄弱。为此,针对极限夹紧工况时夹具的受力变形进行了分析,通过结构改进与误差补偿,提高了夹具定位精度和磨削加工的可靠性。In high speed precision grinding the peripheral of indexable inserts,due to the double chucks clamping the blade by the oil pressure,and through the friction and the oil pressure produced in the blade to restrain the insert'six movement degrees,all these w ill make the fixture structure rigid become relatively w eak.Therefore,the paper analyses the fixture deformation in the limit w orking condition,and improves the accuracy of the fixture location and the reliability of the grinding process through the structure improvement and error compesation.国家国家科技重大专项(2010ZX04001-162

RTCVD工艺制备poly-Si薄膜太阳电池的研究

报道了快速热化学气相沉积(RTCVD)工艺制备多晶硅(poly -Si)薄膜及电池的实验和结果。采用SiH_2Co_2作为原料气体，衬底温度为1030℃时，薄膜的生长速率为10nm/s。发现薄膜的平均晶粒度及载流子迁移率与衬底温度和材料有关。用该薄膜在未抛光重掺杂磷的硅衬底上制备1cm~2的p~+n结样品电池，无减反射涂层，其转换效率为4.54%(AM1.5,100mW/cm~2,25℃)