床身刮研时,刮平导轨Ao以A1导轨为基准测量两导轨的扭曲度,在专用桥板上放水平仪,要求( ),直线只许中凸,要求直线度0.005mm/1000mm,0.01mm/全长。A.0.002mm/1000mm,0.01mm/全长B.0.003mm/1000mm,0.015mm/全长C.0.005mm/1000mm,0.01mm/全长D.0.004mm/1000mm,0.02mm/全长
床身刮研时,刮平导轨Ao以A1导轨为基准测量两导轨的扭曲度,在专用桥板上放水平仪,要求( ),直线只许中凸,要求直线度0.005mm/1000mm,0.01mm/全长。
A.0.002mm/1000mm,0.01mm/全长
B.0.003mm/1000mm,0.015mm/全长
C.0.005mm/1000mm,0.01mm/全长
D.0.004mm/1000mm,0.02mm/全长
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床身刮研时,先刮V形导轨A1两面,水平仪作为半精测量,光学平直仪作为精测量。垂直面内和水平面内的直线度要求0.005mm/1000mm,0.01mm/全长。垂直面内( ),刮研点数(20~22)点/(25mm×25mm)。A.只许内凹B.不许外凸C.只许外凸D.不许内凹
加工机床床身时,应首先以床身底面为粗基准加工导轨面。