千分尺的讀數(shù)課件

1、1,被檢零件圖：,檢測內(nèi)容：,0,05,.,0,30,?,?,尺寸公差：,量具的選用：,外徑千分尺,30 的直徑,0.018,2,千分尺類量具又稱測微類量,具，它是利用螺旋副運動原理進(jìn),行測量和讀數(shù)的一種測微量具。,3,0,05,.,0,30,?,?,固定套筒,固定測砧,測力裝置,微分筒,測微螺桿,尺架,鎖緊扳手,0-25,、,25,50,、,50,75,幾種；,一般每隔,25mm,為一檔。,常用的量程規(guī)格：,4,0,05,.,0,30,?,?,微分筒有,50,格刻度，其,每旋轉(zhuǎn)一周軸,向移動,0.5mm,。,那么每轉(zhuǎn)一小,個格移動,0.01mm,，其分,度值也為,0.01mm,.,固定套筒上

2、刻有基準(zhǔn),線，基準(zhǔn)線上下側(cè)有兩排,刻度線，上下兩條相鄰刻,度線的間隔為每格,0.5mm,.,5,讀數(shù)：,1,、固定套筒讀數(shù)：讀露出刻線的整毫米和半毫米數(shù)。,2,、,微分筒讀數(shù)：讀出與基準(zhǔn)線對準(zhǔn)的微分筒上格數(shù)（估讀一位）分度值,3,、測量結(jié)果,=,固定套筒讀數(shù),+,微分筒格讀數(shù),固定套筒讀數(shù)：,30.5,微分筒讀數(shù)：,29.8,0.01=0.298,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=30.5+0.298=30.798,6,固定套筒讀數(shù)：,31,微分筒讀數(shù)：,25.0,0.01=0.250,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=31+0.250=31.250,微分筒刻度與基準(zhǔn)線

3、對齊,7,固定套筒讀數(shù)：,30.5,微分筒讀數(shù)：,46.3,0.01=0.463,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=30.5+0.463=30.963,固定套筒刻度露出與不露出難以判斷。,注意：,當(dāng),0,刻度在基準(zhǔn)線上屬于沒出，,0,刻度在基準(zhǔn)線下屬于以出。,8,。,固定套筒讀數(shù)：,微分筒讀數(shù),:,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=,32,13.5,0.01=0.135,32+0.135=32.135,9,。,固定套筒讀數(shù)：,微分筒讀數(shù),:,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=,30,14.0,0.01=0.140,30+0.140=30.140,10,。,固定套筒讀數(shù)：,微分筒讀數(shù),:,測量結(jié)果,=,固定套筒讀數(shù),+,微分筒讀數(shù),=,31,4.6,0.01=0.046,31+0.046=31.046,11,1,、先轉(zhuǎn)動千,分尺的微分筒,2,、待測微螺桿,的測量面接近被,測面時改轉(zhuǎn)測力,裝置,3,、鎖緊扳,手、讀數(shù),12,任務(wù)：,用校準(zhǔn)過,的外徑千,分尺檢測,零件的尺,寸！,13,14,從本節(jié)課的內(nèi)容來看，我們在檢,測零件時選用量具的主要依據(jù)是什么？