千分尺和游标卡尺的读数方法

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2024-11-29 06:06:53
推荐回答(5个)
回答(1):

千分尺的使用

1.使用千分尺时,必需首先归零,深度千分尺需在1级平台上归零,内径千分

尺校准时必须用专用校正规,归零时假如是带有测力装置的千分尺,归零

时所用的力须和测量时保持一致

2.深度千分尺归零时,首先将测量杆收回基座,将千分尺的基座置於平台,缓慢

使测量杆向下移动至平台,然

3.外径千分尺归零时,缓慢地使测量杆与测砧接触,如是需要校正的应加用校%5

正杆,所用的力度为不使校正杆滑落国家规范规定用力为2~3N

4.丈量时,为了考虑到丈量的不确定性,一般都要置零两次以上,

5.使用外径千分尺进行外径千分尺进行测量时,严禁单手操纵,最好采用千分

尺底座或辅助设备.

6.由於千分尺为精确测量仪器,考虑到其测量时的重复性因素,丈量时应多取

几次测量值

7.内径千分尺测量多为三点接触式,丈量时应留意其上下位置和垂直情况

8.丈量完成后,应对千分尺再次回零观察是否可以归零,其示值零位误差不

可超过0.002mm,否则需要重新丈量或校准

游标卡尺是利用游标原理对两测量面相对移动分隔的距离进行读数的丈量用具.简称卡尺或普通卡尺.具有四个功能:1.外尺寸测量2.内尺寸测量3.深度和高度尺寸测量4.用於划直线和平行线,有时也称四用卡尺.游标卡尺分为三个类型,Ⅰ型,Ⅱ型,Ⅲ型卡尺.

其结构部件主要有内量爪,外量爪,深度丈量杆,紧固镙丝,主尺框和游标尺框等.

Ⅰ型卡尺如下:

Ⅱ型卡尺与Ⅰ型卡尺在结构上没有区别,Ⅱ型卡尺没有深度测量杆.其情形如下:

Ⅲ型卡尺与Ⅰ,Ⅱ型比拟除了没有深度丈量杆外,而且还没有内量爪.

回答(2):

一、普通外径千分尺读数比较简单,微分套筒一周均匀刻有50的分度,微分螺丝的螺距一般为0.5mm,所以其分度值为0.01mm。毫米刻度在固定套筒上,每0.5mm一个刻度。因此,大于0.5mm的整个数(大数)在固定套筒上读取,小于0.5mm的读数(小数),在微分筒上读出:如微分筒转过了34个分度数,(小于0.5mm)即读数为34*0.01mm=0.34mm.
二、带游标的千分尺和游标卡尺的读数机理基本相同,大数分别从千分尺的固定套筒和卡尺的主尺上读出,小数部分则依赖于第几根游标分度刻线与指标线(千分尺)或主刻线(卡尺)对准(齐)。对于分度值为0.02mm的卡尺,如主尺上的某根刻线与第7根游标刻线对准,则此时小数读数为7*0.02=0.14mm。(要注意的是:卡尺的游标尺上一般会按0.1mm的间隔标度在其刻度面上)此时如主尺上的读数(也即大数部分)为62mm,则测量值为62+0.14=62.14mm。

回答(3):

常用量具~游标卡尺 千分尺 百分表 使用动画课件。谁能读出测量的数据是多少

回答(4):

回答(5):

http://wenku.baidu.com/view/62cb6f0ef12d2af90242e633.html
希望对你有帮助

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