GBT7235-1987-评定圆度误差的方法半径变化量测量.pdf

《GBT7235-1987-评定圆度误差的方法半径变化量测量.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、UDC531.717..I04中华人民共和国国家标准GB7235一87评定圆度误差的方法半径变化量坝量Methodsfortheassessmentofdeparturefromroundness一Measurementofvariationsinradius1987一02一04发布1988一01一01实施国家乖示准熟发布目录1引言··，·······························································································，······⋯⋯(1)2引用标准········

2、···············································。···········································⋯⋯(1)3仪器····································，.·。·····················································、、·········⋯⋯(1)4圆度误差的评定························，······························，··················

3、·············⋯⋯(3)附录A圆度测量···。························。···································，····························⋯⋯(7)附录B校准························，.···················。·····⋯⋯‘·····。················⋯⋯:···········⋯⋯(11)附录C主轴系统误差的确定······················································

4、······················，.··⋯(12)附录D最小二乘方圆和圆心的确定·...........................................................:........·一(15)附录E图形记录和读极坐标图的规则·..............................................................··⋯⋯(16)中华人民共和国国家标准UDC531.717评定圆度误差的方法GB7235-87半径变化量测量Methodsforthe.assessmentofdeparturef

5、romroundness一Measurementofvariationsinradius奋引言本标准规定了用接触式(触头式)仪器测量半径变化来确定圆度误差的方法及仪器的一般特性。本标准适用于在给定条件下、绍踌仑廓变换，以下列任一圆心来评定零件轮廓对理想圆的偏离。a.最小区域圆圆心，b.最小二乘方圆圆心，‘c.最小外接圆圆心，d.最大内接圆圆心。本标准参照采用国际标准ISO4291-1985(评定圆度误差的方法一半径变化量测量》。注:给定条件包括触头、‘电子i>8波器的频率特性(如使用的话)，图形或数字描述轮晓的许可偏心(通常为图形平均半径的7%一15%，见附录E)，测量截面

6、韵位置或与零件某些特征有关的截面位置。2引用标准GB1182-80《形状和位置公差代号及其注法》。3仪器3.1仪器类型和一般要求接触式圆度测量仪分二种:a.传感器旋转式:带有触头的传感器随主轴旋转，放置在工作台上的被侧零件固定不动。b.工作台旋转式:带有触头的传感器固定，放置在工作台上的被测零件随工作台一起旋转。仪器测量结果有二种输出方式:a.·图形记录式，b.参数直接显示式。同一仪器可具有上述一种或两种输出方式。仪器触头应符部.1.1至3.1.3的要求。3.1.1触头型式及其尺寸被测零件的表面特征是选择触头型式的首要条件，为满足测量不同特征和大小的不规则表面的要求，触头有

7、如图1至图4等不同型式。国家标准局1987一02一04发布1988一01一01实施1GB7235-87，协连马孙昌协图1球形触头图2柱形触头议}月尸}‘飞}}y图3斧形触头图4卵形触头各触头尺寸r或R应按下列数值选取，0.25,0.8,2.5，8,25-m注:力满足特定要求，允许制造和使用其它适宜的形状和尺寸的触头。3.1.2触头静压力触头的静压力应能在。一。.25N范围内调整，测量时，触头的测量力应调整到保证触头与被测表面连续接触的最低值。3.1.3仪器的频率响应仪器滤波器的通带范围规定如下:1一15,1一50,