千分尺游标卡尺.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,游标卡尺,螺旋测微器的使用,外测量爪,紧固螺钉,主尺,游标尺,尺身,此时游标尺上,0,刻线与主尺上,0,刻线重合,深度尺,一、游标卡尺,内测量爪,L,拧紧紧固螺钉,将被测物体放于外测量爪内夹紧,被测长度,这样读数与一般的刻度尺没有区别,1,、用,10,分度游标卡尺测外径,总长为,9mm,每一格长度为,0.9mm,精度,0.1mm,A,B,L=A-B=108mm-80.9mm,=,100.8mm,=100mm+8,0.1mm,8,被测长度,=,主尺整数读数,+,游标对齐刻度,精度,42.5mm,53.7mm,91.7mm,133.1mm,读数练习,总长为,19mm,每一格长度为,0.95mm,精度,0.05mm,2,、用,20,分度游标卡尺测外径,L,为被测长度,B,A,L=A-B=115.0mm-150.95mm,=,100.75mm,=100mm+15,0.05mm,被测长度,=,主尺整数读数,+,游标对齐刻度,精度,14mm,170.05mm,读数为,14.85mm,读数练习,总长为,49mm,每一格长度为,0.98mm,精度,0.02mm,3,、用,50,分度游标卡尺测外径,A,B,L=A-B=137mm-370.98mm,=,100.74mm,=100mm+37,0.02mm,被测长度,=,主尺整数读数,+,游标对齐刻度,精度,23mm,230.02mm,23.46mm,二、螺旋测微器,旋螺,旋螺每旋动一周就带动测微螺杆前进或后退,0.5mm,千分尺读数方法,11.5mm,0.492mm,11.992mm,估读到,mm,后千分位,千分尺,1.627mm,8.939mm,13.227mm,