JJF(浙) 1195-2023 60°密封管螺纹量规校准规范

U浙)JJF(浙)1195-2023CalibrationSpecificationf2023-04-17发布2023-07-17实施JJF（浙）1195—2023JJF（浙）1195—2023I 4 4 4 本规范依据JJF1071-2010《国家计量校准规范编写规则》、JJF1001-2011《通用计量术语及定义》和JJF1059.1-2012《测量不确定度评定与表示》进行编JJF（浙）1195—2023160°密封管螺纹量规校准规范在圆锥表面上所形成的具有相同牙型、沿螺在中径圆锥上，两个位置的直径差与这两个位置NPT圆锥螺纹量规是对60°密封管螺纹要素尺寸边界条件进行综合检验的计量器具，用于控制60°密封管螺纹要素的极限尺寸。其主要特征为牙型角呈2国标：NPT1/4-18LH(美标1/4-18NPTLH),没有“LH”的代NPT1/4,NPT1/4-18。JJF（浙）1195—20233表1计量特性及符号参数名称符号参数名称符号基面大径基面小径基面中径ʹʹ中径圆锥锥度牙侧角αͳ,ߙʹ牙型角α螺距基准距离ͳ表2环境温度及被测量规与校准用设备温差要求测量范围室内温度对20℃的允许偏差/℃平衡温度的时间/h≤100mm±22>100mm±13表3被校参数、标准器名称及主要技术参数被校参数标准器名称及主要技术参数基面大小径螺纹综合测量机MPE:±(3+/200)µm万能工具显微镜MPE:±(1+/200)µm基面中径、中径圆锥锥度、螺距螺纹综合测量机MPE:±(3+/200)µm测长仪MPE:±(1+/200)µm+T形球探针、量针（直径测量不确定度≤0.5μm）牙侧角螺纹综合测量机MPE:±1´、万能工具显微镜MPE:±1´JJF（浙）1195—20234基准距离数显测高仪MPE:±(2+/300)μm、1级平板b)用标准环规按式（2）对T型测头的K值进行校准，校准时T型测头的5c)在保留全部螺纹牙槽的范围内，确定基面所在的被测牙槽和被测直径方纹轴向位移示值Z₃和T型测头螺纹轴向浮动位移示值Zs。d)若基面处只能在螺纹一侧测量而另一侧牙槽已不存在，选择尽可能接近基面且两侧均可测量的被测牙槽i(由基面所在牙槽0起向小端面数第i个牙槽),将量球置于被测牙槽i内，分别测量和记录测长仪测量示值X、工作台螺纹轴向被测牙槽0和螺纹另一侧+0.5P牙槽内(图4.1),分别测量和记录测长仪测量值Z。。若基面处螺纹两侧均可测量，被测牙槽i即为基面所在牙槽(图4.2),此时i=0,X;=Xo,Xi+0.5P=Xo+0.5P,Xi-0.5p=Xo-0.5p,Zi=Zo,Zi=Z₀。JJF(浙)1195—20236mK图4.2量球法测量外螺纹基面中径图4.3量球法测量外螺纹的轴向平面图基面中径按式(3)计算。JJF（浙）1195—20237——从基面到小端面的轴向距离；T——圆锥螺纹中径圆锥的锥度。ͳήͳήʹ（4）ήtͳʹήtʹtݐͳhݐή6）——在测量平面内，测量线与牙侧线交点到螺纹轴线的径向距离；i=1表），）； tttXtttߜ——量球（针）直径；——量球与被测牙槽i+0.5P接触，测长仪的——量球与被测牙槽i-0.5P接触，测长仪的测量示值；JJF（浙）1195—20238——T型测头的K值；——T型测头的K值；使用螺纹综合测量仪测量时，端面的位置使用基面规标定获得，对于NPT塞规，由端面往大端偏移一个基准距离，即是基面；对于NPT环规，大端面就图5二维轮廓扫描法测量外螺纹基面中径9基面中径按公式(9)～(15)计算。ͳͳʹʹtʹtXtʹtXXtttߜtȟʹ螺距测量可采用二维轮廓扫描法进行测量。也可采用量球法等其他满足测量准确度要求的方法。螺距测量应尽可能在螺纹全长上至少JJF（浙）1195—2023JJF（浙）1195—2023表A螺纹工作量规的基本尺寸单位：mmhͳ面面面面面面面面270.9414.0647.4397.6937.8546.8887.3036.3376.591270.9414.1029.78510.04110.2039.2339.4899.6528.6828.9381.4115.78613.04013.40213.67812.48712.76411.21111.5733/81.4116.09616.45916.84015.54515.92614.63115.0121.81420.47220.98021.32019.26419.77218.05618.5643/41.8148.61125.78726.32626.65424.57925.44523.37123.90912.20932.29732.93233.38130.82631.46131.91029.35529.9902.20910.66841.02241.68942.14439.55140.21840.67338.08038.7472.20910.66847.09247.75848.24045.62146.28746.76944.15044.81622.20911.07459.79660.30557.63358.32558.83456.8542½817.32371.19172.27372.99769.07670.15970.88266.96268.0443819.45686.96788.87284.85286.06886.75782.73783.9533½820.85399.587100.891101.57297.47398.77699.45795.35896.6614821.438112.208113.548114.272110.093111.433107.978109.3185823.800139.039140.527141.272136.925138.412134.810136.2976824.333165.845167.366168.247163.731165.252161.6168827.000216.328218.015219.047214.213215.901216.932212.099213.786830.734269.966271.886273.022267.851269.772270.907265.736267.657834.544320.448322.607323.822318.333320.492321.707316.219318.378839.675352.000354.479355.572349.885352.365353.457347.770350.250846.025402.482405.359406.372400.368403.244404.257398.253401.130850.800452.965456.140457.172450.850454.025455.057448.735451.91020853.975503.447506.821507.972501.333504.706505.857499.218502.59124860.325604.412608.182609.572602.298606.068607.457600.183603.953表B螺纹工作量规的尺寸偏差单位：mm螺纹尺寸代号牙数塞规环规基面±基面大径-螺距±锥度+半角±基准距离-基面小径+螺距±锥度-半角±基准距离+校对规基面平齐±270.0050.0100.0050.0080.0250.0100.0080.015200.0250.051270.0050.0100.0050.0080.0250.0100.0080.015200.0250.0510.0050.0150.0050.0100.0250.0150.0080.018200.0250.0513/80.0050.0150.0050.0100.0250.0150.0080.018200.0250.0510.0080.0250.0050.0150.0250.0250.0080.0230.0250.0513/40.0080.0250.0050.0150.0250.0250.0080.0230.0250.05110.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.05120.0080.0250.0080.0200.0250.0250.0100.0300.0250.0512½80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076380.0130.0410.0100.02570.0510.0410.0130.0360.0510.0763½80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076480.0130.0410.0100.02570.0510.0410.0130.0360.0510.076580.0130.0410.0100.02570.0510.0410.0130.0360.0510.076680.0130.0410.0100.02570.0510.0410.0130.0360.0510.076880.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.0512080.0200.0760.0130.02570.0510.0760.0130.0360.0512480.0200.0760.0130.02570.0510.0760.0130.0360.051*在基准距离L1范围内的中径圆锥锥度。计算获得基面中径值。取各组计算数据均值为锥管螺ʹt（C.1）式中:ʹ——锥管螺纹塞规基面中径值；t——仪器上被测锥管螺纹塞规基面中径测得值。表A.1实验数据和实验结果（单位：mm）3/4-14NPT管螺纹塞规次数12345读数值25.119825.119825.119825.119725.1197次数6789读数值25.119725.119725.119725.119725.1194平均值25.119701-111/2NPT锥管螺纹环规次数12345读数值31.474631.474831.475031.475031.4751次数6789读数值31.475031.475131.474831.474831.4750平均值31.47492ൎൎൎʹ螺纹综合测量仪的外尺寸最大允许误差MPE:±(2.5+/200)µm，内尺寸最大ൎʹൎ͵Ǥͳͺൎ͵Ǥͳͺttήοߙ——分别是被测锥度螺纹塞规线膨胀系数ߙ、螺纹综合测量仪光栅尺的线根据光滑塞规、光滑环规校准报告，标称直径L<50mm的扩展不确定度JJF（浙）1195—2023ǤJJF（浙）1195—2023表A.2标准不确定度一览表锥螺纹塞规不确定度来源标准不确定度(μm)重复性引入的标准不确定度ݑͳt0.116标准器引入的标准不确定度ݑʹt由温度差引入的标准不确定度分量ݑ͵t0.106光滑塞规引入的标准不确定度分量ݑͶt0.250锥螺纹环规重复性引入的标准不确定度ݑͳt0.161标准器引入的标准不确定度ݑʹt由温度差引入的标准不确定度分量ݑ͵t0.132光滑环规引入的标准不确定度分量ݑͶt0.250ttݑttݑttݑt=1.545μm（C.10）ttݑttݑttݑt=1.852μm（C.11）C.2使用测长仪测量NPT锥螺纹塞规的测ήൎ4μmC.2使用测长仪测量NPT锥螺纹塞规的测ʹttʹttJJF（浙）1195—2023考虑各分量间彼此相互独立，依据间接测量ʹʹʹʹtݑtݑtݑtݑTtݑ͵tʹ定ή͵tʹ影响锥管螺纹塞规基面中径测量结果的主要因素有测长仪引入分量和测球ttߜttʹtt选择规格：NPT3/4-14型号美制圆锥螺纹塞规进行10表A.1实验数据和实验结果(单位：mm)次数12345读数值25.119825.119825.119825.119725.1197次数6789读数值25.119725.119725.119725.119725.1194JJF（浙）1195—2023平均值25.11970ͳ(m)ൎ0.116μm（C.17）ൎ测长仪进行测量时，控制每次测量时测力为0.3N左右，测量力变