游标卡尺原理和使用 (2)

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,*,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,10,游标卡尺的原理和使用,新洲一中,结构与功能,原理与读数,1,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,10,游标尺,主尺,外径测脚,深度窄片,内径测脚,被测球体,锁定旋钮,一,.,结构与功能,两条零刻线的间距等于各测量点的间距,2,二、基本工作原理,错位放大法,0,1,2,3,4,5,6,7,8,9,10,0,1,2,3,4,5,6,7,8,9,10,3,二、基本工作原理,错位放大法,0,1,2,3,4,5,6,7,8,9,10,将主尺的,9,小格,9,毫米长度平均分成,10,份，做成游标尺，游标尺的每小格即为,0.9,毫米,比主尺相应小,0.1,毫米,根据游标尺和主尺的刻度错位可测量不足一毫米的长度,5,5,4,0,1,2,3,4,5,6,7,8,9,10,0,5,10,三、读数练习,(,一,),0,5,10,0,5,10,0,5,10,0,5,10,0,5,10,0,5,10,0,5,10,5,四、原理拓展,(,一,),0,1,2,3,4,5,6,7,8,9,10,将主尺的,19,小格,19,毫米长度平均分成,20,份，做成游标尺，游标尺的每小格即为,0.95,毫米,比主尺相应小,0.05,毫米,根据游标尺和主尺的刻度错位可测量不足一毫米的长度,10,0,2,4,6,8,10,0,2,4,6,8,6,0,1,2,3,4,5,6,7,8,9,10,三、读数练习,(,二,),0,10,20,0,10,20,0,10,20,0,10,20,0,10,20,7,四、原理拓展,(,二,),0,1,2,3,4,5,6,7,8,9,10,将主尺的,49,小格,49,毫米长度平均分成,50,份，做成游标尺，游标尺的每小格即为,0.98,毫米,比主尺相应小,0.02,毫米,根据游标尺和主尺的刻度错位可测量不足一毫米的长度,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,0,0,1,2,3,4,5,6,7,8,9,0,8,六,.,读数方法归纳,1.,确认游标格数,算出每格代表示数,x mm,2.,从主尺读出游标尺零刻线前的示数,L,1,3.,看游标尺的第几条刻线跟主尺上某一 条刻线对齐,毫米以下的读数就是几乘,x mm,得游标尺示数,L,2,4.,结论为,L,1,+L,2 ,5.,注意单位和有效数字“,0”,游标尺不需要估读。,9,谢谢！,二零零五年元月,10,