U浙)JJF(浙)1195-2023CalibrationSpecificationf2023-04-17發布2023-07-17實施JJF（浙）1195—2023JJF（浙）1195—2023I 4 4 4 本規范依據JJF1071-2010《國家計量校準規范編寫規則》、JJF1001-2011《通用計量術語及定義》和JJF1059.1-2012《測量不確定度評定與表示》進行編JJF（浙）1195—2023160°密封管螺紋量規校準規范在圓錐表面上所形成的具有相同牙型、沿螺在中徑圓錐上，兩個位置的直徑差與這兩個位置NPT圓錐螺紋量規是對60°密封管螺紋要素尺寸邊界條件進行綜合檢驗的計量器具，用于控制60°密封管螺紋要素的極限尺寸。其主要特征為牙型角呈2國標：NPT1/4-18LH(美標1/4-18NPTLH),沒有“LH”的代NPT1/4,NPT1/4-18。JJF（浙）1195—20233表1計量特性及符號參數名稱符號參數名稱符號基面大徑基面小徑基面中徑??中徑圓錐錐度牙側角α?,??牙型角α螺距基準距離?表2環境溫度及被測量規與校準用設備溫差要求測量范圍室內溫度對20℃的允許偏差/℃平衡溫度的時間/h≤100mm±22>100mm±13表3被校參數、標準器名稱及主要技術參數被校參數標準器名稱及主要技術參數基面大小徑螺紋綜合測量機MPE:±(3+/200)μm萬能工具顯微鏡MPE:±(1+/200)μm基面中徑、中徑圓錐錐度、螺距螺紋綜合測量機MPE:±(3+/200)μm測長儀MPE:±(1+/200)μm+T形球探針、量針（直徑測量不確定度≤0.5μm）牙側角螺紋綜合測量機MPE:±1′、萬能工具顯微鏡MPE:±1′JJF（浙）1195—20234基準距離數顯測高儀MPE:±(2+/300)μm、1級平板b)用標準環規按式（2）對T型測頭的K值進行校準，校準時T型測頭的5c)在保留全部螺紋牙槽的范圍內，確定基面所在的被測牙槽和被測直徑方紋軸向位移示值Z?和T型測頭螺紋軸向浮動位移示值Zs。d)若基面處只能在螺紋一側測量而另一側牙槽已不存在，選擇盡可能接近基面且兩側均可測量的被測牙槽i(由基面所在牙槽0起向小端面數第i個牙槽),將量球置于被測牙槽i內，分別測量和記錄測長儀測量示值X、工作臺螺紋軸向被測牙槽0和螺紋另一側+0.5P牙槽內(圖4.1),分別測量和記錄測長儀測量值Z。。若基面處螺紋兩側均可測量，被測牙槽i即為基面所在牙槽(圖4.2),此時i=0,X;=Xo,Xi+0.5P=Xo+0.5P,Xi-0.5p=Xo-0.5p,Zi=Zo,Zi=Z?。JJF(浙)1195—20236mK圖4.2量球法測量外螺紋基面中徑圖4.3量球法測量外螺紋的軸向平面圖基面中徑按式(3)計算。JJF（浙）1195—20237——從基面到小端面的軸向距離；T——圓錐螺紋中徑圓錐的錐度。?????（4）?t???t?t??h??6）——在測量平面內，測量線與牙側線交點到螺紋軸線的徑向距離；i=1表），）； tttXttt?——量球（針）直徑；——量球與被測牙槽i+0.5P接觸，測長儀的——量球與被測牙槽i-0.5P接觸，測長儀的測量示值；JJF（浙）1195—20238——T型測頭的K值；——T型測頭的K值；使用螺紋綜合測量儀測量時，端面的位置使用基面規標定獲得，對于NPT塞規，由端面往大端偏移一個基準距離，即是基面；對于NPT環規，大端面就圖5二維輪廓掃描法測量外螺紋基面中徑9基面中徑按公式(9)～(15)計算。????t?tXt?tXXttt?t??螺距測量可采用二維輪廓掃描法進行測量。也可采用量球法等其他滿足測量準確度要求的方法。螺距測量應盡可能在螺紋全長上至少JJF（浙）1195—2023JJF（浙）1195—2023表A螺紋工作量規的基本尺寸單位：mmh?面面面面面面面面270.9414.0647.4397.6937.8546.8887.3036.3376.591270.9414.1029.78510.04110.2039.2339.4899.6528.6828.9381.4115.78613.04013.40213.67812.48712.76411.21111.5733/81.4116.09616.45916.84015.54515.92614.63115.0121.81420.47220.98021.32019.26419.77218.05618.5643/41.8148.61125.78726.32626.65424.57925.44523.37123.90912.20932.29732.93233.38130.82631.46131.91029.35529.9902.20910.66841.02241.68942.14439.55140.21840.67338.08038.7472.20910.66847.09247.75848.24045.62146.28746.76944.15044.81622.20911.07459.79660.30557.63358.32558.83456.8542?817.32371.19172.27372.99769.07670.15970.88266.96268.0443819.45686.96788.87284.85286.06886.75782.73783.9533?820.85399.587100.891101.57297.47398.77699.45795.35896.6614821.438112.208113.548114.272110.093111.433107.978109.3185823.800139.039140.527141.272136.925138.412134.810136.2976824.333165.845167.366168.247163.731165.252161.6168827.000216.328218.015219.047214.213215.901216.932212.099213.786830.734269.966271.886273.022267.851269.772270.907265.736267.657834.544320.448322.607323.822318.333320.492321.707316.219318.378839.675352.000354.479355.572349.885352.365353.457347.770350.250846.025402.482405.359406.372400.368403.244404.257398.253401.130850.800452.965456.140457.172450.850454.025455.057448.735451.91020853.975503.447506.821507.972501.333504.706505.857499.218502.59124860.325604.412608.182609.572602.298606.068607.457600.183603.953表B螺紋工作量規的尺寸偏差單位：mm螺紋尺寸代號牙數塞規環規基面±基面大徑-螺距±錐度+半角±基準距離-基面小徑+螺距±錐度-半角±基準距離+校對規基面平齊±270.0050.0100.0050.0080.0250.0100.0080.015200.0250.051270.0050.0100.0050.0080.0250.0100.0080.015200.0250.0510.0050.0150.0050.0100.0250.0150.0080.018200.0250.0513/80.0050.0150.0050.0100.0250.0150.0080.018200.0250.0510.0080.0250.0050.0150.0250.0250.0080.0230.0250.0513/40.0080.0250.0050.0150.0250.0250.0080.0230.0250.05110.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.0510.0080.0250.0080.0200.0250.0250.0100.0300.0250.05120.0080.0250.0080.0200.0250.0250.0100.0300.0250.0512?80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076380.0130.0410.0100.02570.0510.0410.0130.0360.0510.0763?80.0130.0410.0100.02570.0510.0410.0130.0360.0510.076480.0130.0410.0100.02570.0510.0410.0130.0360.0510.076580.0130.0410.0100.02570.0510.0410.0130.0360.0510.076680.0130.0410.0100.02570.0510.0410.0130.0360.0510.076880.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0130.0510.0100.02570.0510.0510.0130.0360.0510.07680.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.05180.0200.0760.0130.02570.0510.0760.0130.0360.0512080.0200.0760.0130.02570.0510.0760.0130.0360.0512480.0200.0760.0130.02570.0510.0760.0130.0360.051*在基準距離L1范圍內的中徑圓錐錐度。計算獲得基面中徑值。取各組計算數據均值為錐管螺?t（C.1）式中:?——錐管螺紋塞規基面中徑值；t——儀器上被測錐管螺紋塞規基面中徑測得值。表A.1實驗數據和實驗結果（單位：mm）3/4-14NPT管螺紋塞規次數12345讀數值25.119825.119825.119825.119725.1197次數6789讀數值25.119725.119725.119725.119725.1194平均值25.119701-111/2NPT錐管螺紋環規次數12345讀數值31.474631.474831.475031.475031.4751次數6789讀數值31.475031.475131.474831.474831.4750平均值31.47492????螺紋綜合測量儀的外尺寸最大允許誤差MPE:±(2.5+/200)μm，內尺寸最大????????????tt?ο?——分別是被測錐度螺紋塞規線膨脹系數?、螺紋綜合測量儀光柵尺的線根據光滑塞規、光滑環規校準報告，標稱直徑L<50mm的擴展不確定度JJF（浙）1195—2023?JJF（浙）1195—2023表A.2標準不確定度一覽表錐螺紋塞規不確定度來源標準不確定度(μm)重復性引入的標準不確定度??t0.116標準器引入的標準不確定度??t由溫度差引入的標準不確定度分量??t0.106光滑塞規引入的標準不確定度分量??t0.250錐螺紋環規重復性引入的標準不確定度??t0.161標準器引入的標準不確定度??t由溫度差引入的標準不確定度分量??t0.132光滑環規引入的標準不確定度分量??t0.250tt?tt?tt?t=1.545μm（C.10）tt?tt?tt?t=1.852μm（C.11）C.2使用測長儀測量NPT錐螺紋塞規的測??4μmC.2使用測長儀測量NPT錐螺紋塞規的測?tt?ttJJF（浙）1195—2023考慮各分量間彼此相互獨立，依據間接測量????t?t?t?t?Tt??t?定??t?影響錐管螺紋塞規基面中徑測量結果的主要因素有測長儀引入分量和測球tt?tt?tt選擇規格：NPT3/4-14型號美制圓錐螺紋塞規進行10表A.1實驗數據和實驗結果(單位：mm)次數12345讀數值25.119825.119825.119825.119725.1197次數6789讀數值25.119725.119725.119725.119725.1194JJF（浙）1195—2023平均值25.11970?(m)?0.116μm（C.17）?測長儀進行測量時，控制每次測量時測力為0.3N左右，測量力變