7799国产精品久久久久99,欧美成人精品一区二三区在线观看,好紧好湿好滑好爽好大,国产嘿嘿嘿视频在线观看

  ŸáéTêP(gu¨¡n)æIÔ~£º
”µ(sh¨´)¿Ø™C(j¨©)´²ÍâÎÄÙYÁÏ
  • Ô“Îļþžédoc¸ñʽ
  • Îļþ´óС£º183.30K
  • ÏÂÝd´Î”µ(sh¨´)£º
  • ÎļþÔu(p¨ªng)¼‰(j¨ª)£º
  • ¸üЕr(sh¨ª)ég£º2013-03-10
  • °l(f¨¡) ²¼ ÈË£ºŸý°×Ò»‚€(g¨¨)ÈË
  • ÎļþÏÂÝd£º
  • Á¢¼´ÏÂÝd

  • Îļþ½é½B£º
  • Ô“Îļþžé doc ¸ñʽ£¬ÏÂÝdÐèÒª 1 ·e·Ö
  • ”µ(sh¨´)¿Ø™C(j¨©)´²ÍâÎÄÙYÁÏ

    Abstract£º ¡¡A method for improving accuracy of CNC machine tools through compensation for the thermal errors is studied. The thermal errors are obtained by 1-D ball array and characterized by an auto regressive model based on spindle rotation speed. By revising the workpiece NC machining program , the thermal errors can be compensated before machining. The experiments on a vertical machining center show that the effectiveness of compensation is good.
    Key words : CNC machine tool ¡¡¡¡Thermal error ¡¡¡¡Compensation
    ...
ÎÄ™nÁôÑÔ
òž(y¨¤n)×C´a: Õˆ(q¨«ng)?ji¨¡n)ÚÓÒ‚?c¨¨)Ý”Èëòž(y¨¤n)×C´a ¿´²»Çå³þ,“QÒ»‚€(g¨¨)
¸ü¶à..ÏàêP(gu¨¡n)ÎÄ™n
    Ÿo(w¨²)ÏàêP(gu¨¡n)ÐÅÏ¢