螺紋緊固件擰緊力矩

1、1.2機械性能為5.6級的螺栓、螺釘和螺柱，其擰緊力矩按表2規(guī)定。中華人民共和國汽車行業(yè)標(biāo)準(zhǔn)汽車用螺紋緊固件擰緊力矩規(guī)范6-20伽、6級精度以上的汽車用一般GB 193-1981普通螺紋直徑與螺GB 197-1981普通螺紋公差與配合螺釘、螺柱和螺母的緊固件，以標(biāo)準(zhǔn)的規(guī)范；螺栓、螺釘、螺柱和螺母機械性能，螺栓、螺釘、螺柱與螺母被擰入基體件強 度級別的組合按GB3098-1982緊固件機械性能標(biāo)準(zhǔn)的規(guī)定。本標(biāo)準(zhǔn)不適用于承受交變載荷或加潤滑劑裝配的螺栓、 及緊定螺釘和類似的不規(guī)定抗拉強度的螺紋緊固件。1、汽車用螺紋緊固件擰緊力矩 1.1機械性能為4.6級的螺栓、螺釘和螺柱，其擰緊力矩按表本標(biāo)準(zhǔn)適用

2、于碳素鋼或合金鋼制造的螺紋直徑為 螺栓、螺釘、螺柱和螺母的緊固。其螺紋尺寸及公差按 距系列、GB 196-1981普通螺紋 基本尺寸和螺紋直徑（伽）螺距（伽）擰緊扭矩標(biāo)準(zhǔn)值最大值最小值N mkgf - mN mkgf - mN mkgf - m614.00.45.50.62.50.381.258.00.811.01.15.00.5818.50.911.51.25.50.6101.519.72.024.72.514.31.5101.2520.82.125.82.616.71.710121.82.226.52.717.01.7121.7537.33.843.34.428.02.9121.538.5

3、3.945.04.629.03.0121.2539.64.048.04.930.03.114261.26.275.07.646.84.8141.574.67.692.09.456.05.716295.09.7115.011.773.07.4161.5105.010.7133.013.676.07.7182.5142.914.6178.018.1107.410.9181.5157.616.1190.019.4124.512.7202.5188.019.2230.023.4135.013.8201.5203.720.8243.024.8149.015.21的規(guī)定。國家機械工業(yè)局1999-03-15

4、批準(zhǔn)實施螺紋直徑（mm）螺距（m）擰緊扭矩標(biāo)準(zhǔn)值最大值最小值N mkgf - mN mkgf - mN mkgf - m614.50.56.00.63.00.381.2510.61.114.01.47.00.78111.01.115.01.58.00.8101.526.02.733.03.419.01.9101.2528.02.934.03.522.02.210129.03.035.03.623.02.3121.7545.04.653.05.437.03.8121.547.04.856.05.738.03.9121.2550.05.160.06.140.04.114281.08.395.09.

5、762.06.3141.590.09.2105.010.768.06.9162124.012.6150.015.398.010.0161.5132.013.5160.016.3101.010.3182.5190.019.4220.022.4161.016.4181.5200.020.4230.023.4165.016.8202.5231.623.6272.027.7190.019.4201.5246.625.1285.029.1197.020.1302793.681950.197637.165.01.3機械性能為8.8級的螺栓、螺釘和螺柱，其擰緊力矩按表3規(guī)定。螺紋直徑（m）螺距（m）擰緊扭矩

6、標(biāo)準(zhǔn)值最大值最小值N mkgf - mN mkgf - mN mkgf - m6190.9121.260.681.25232.3262.7161.681252.5282.9171.7101.5596.0757.6373.8101.25636.4798.1454.6101646.5808.2464.7121.75959.711111.3737.4121.5979.911311.5757.6121.259910.111511.7788.014216016.318518.912212.4141.518018.320520.914614.916221521.924525.018218.6161.524

7、024.527027.519920.3182.526827.329830.422923.3181.531632.234635.328729.3202.543043.847047.938939.7201.544044.948048.939640.41.4機械性能為10.9級的螺栓和螺柱，其擰緊力矩按表4規(guī)定。螺紋直徑（mm）螺距（m）擰緊扭矩標(biāo)準(zhǔn)值最大值最小值N mkgf - mN mkgf - mN mkgf - m101.5747.5909.2525.3101.25788.0939.5636.1101808.2959.7656.6121.7514014.315615.910510.7121.

8、514214.515816.110610.8121.2514514.816116.410811.014217517.820020.414114.4141.521021.423524.017818.116228028.531031.620020.4161.530531.133534.124024.5182.543744.546747.638038.7181.546747.650751.739740.5202.552853.856857.945045.9201.555856.959861.047548.4扭力扳手?jǐn)Q緊力矩的標(biāo)準(zhǔn)范圍:5-25 N m200-600 N m10-50 N m750-2

9、000 N m20-100 N m70-230 N m40-200 N m200-760 N m60-300 N m300-1000 N m120-400 N m400-1200 N m150-500 N m附錄螺紋緊固件的擰緊力矩在擰緊螺母時，其擰緊扭矩M需要克服被旋合螺紋間的摩擦力矩和螺母與被聯(lián)接件 墊圈）支承面之間的摩擦力矩，并使聯(lián)接產(chǎn)生預(yù)緊力P。，它們的關(guān)系為M=KP o d X 10-3（或式中：M 擰緊扭矩，N - m-擰緊扭矩系數(shù)； 預(yù)緊力，N;K -Pod螺紋直徑，mo要想得到規(guī)定的預(yù)緊力，應(yīng)進行的量的實驗求出擰緊扭矩系數(shù)的實際數(shù)值，通過以上 的關(guān)系計算，把一定大小的扭矩施加到螺母上就能得到。通過實驗和數(shù)學(xué)分析得出，汽車用普通螺紋緊固件擰緊扭矩系數(shù)的平均值為0.284o對于表1-表4中未規(guī)定的各級機械性能的螺紋緊固件的擰緊扭矩，可按（ A2 ）、（ A3 ）、（A5 ） 經(jīng)驗公式計算確定。螺紋緊固件最大擰緊扭矩為M max=0.170 T sAsdX 10 3式中M max最大擰緊扭矩，N - mT s螺紋緊固件的屈服強度As螺紋部分有效面積，N/mm2；