螺栓预紧力
8.8级螺栓预紧力
最小抗拉强度σb 最小屈服强度σs 螺纹公称直径螺距
外螺纹中径外螺纹小径螺纹原始三角形高度H=31/2/2*p
螺纹公称应力截面积As=(π/4)*(d1)2螺栓预紧力最大值F0=0.75*σs*As
考虑载荷系数 0.75拧紧力矩系数取值
mm
1.0831.2991.5161.7322.1652.5982.5983.0313.4643.897
4.334.763
800 MPa640 MPa
d (mm)M 8M 10M 12M 16M 20M 24M 27p (mm)1.251.51.7522.533d2 (mm)7.1889.02610.8614.718.3822.0525.05d1 (mm)6.6478.37610.1113.8317.2920.7523.75
M 30M 36M 42M 48M 563.544.555.527.7333.439.0844.7552.4326.2131.6737.1342.5950.05
mm234.755.180.21150.3234.9338.2443.1539.6787.[1**********]67
kN 16.6626.4538.572.16112.7162.4212.7259378.1519.7683.7944.2t 1.72.6993.9287.36311.516.5721.726.4338.5853.0369.7796.35k= 0.12
扳手力矩T=K*F0*dN*mkg*m15.9931.7455.44138.5270.6467.6689.1932.[***********].6323.2395.65714.1427.6147.7170.3295.14166.7267.3401.9647.5
10.9级螺栓预紧力
最小抗拉强度σb 最小屈服强度σs 螺纹公称直径螺距
外螺纹中径外螺纹小径螺纹原始三角形高度H=31/2/2*p
螺纹公称应力截面积As=(π/4)*(d1)2螺栓预紧力最大值F0=0.75*σs*As
考虑载荷系数 0.75拧紧力矩系数取值
mm
1.0831.2991.5161.7322.1652.5982.5983.0313.4643.897
4.334.763
1000 MPa900 MPa
d (mm)M 8M 10M 12M 16M 20M 24M 27p (mm)1.251.51.7522.533d2 (mm)7.1889.02610.8614.718.3822.0525.05d1 (mm)6.6478.37610.1113.8317.2920.7523.75
M 30M 36M 42M 483.544.5527.7333.439.0844.7526.2131.6737.1342.59
M 565.552.4350.05
mm234.755.180.21150.3234.9338.2443.1539.6787.[1**********]67
kN 23.4237.254.14101.5158.6228.3299.1364.2531.7730.8961.51328t 2.393.7955.52410.3516.1823.330.5237.1754.2674.5798.11135.5k= 0.12
扳手力矩T=K*F0*dN*mkg*m22.4944.6377.96194.8380.5657.5969.[***********]9232.2944.5557.95519.8838.8367.198.88133.8234.4375.9565.1910.5
12.9级螺栓预紧力
最小抗拉强度σb 最小屈服强度σs 螺纹公称直径螺距
外螺纹中径外螺纹小径螺纹原始三角形高度H=31/2/2*p
螺纹公称应力截面积As=(π/4)*(d1)2螺栓预紧力最大值F0=0.75*σs*As
考虑载荷系数 0.75拧紧力矩系数取值
mm
1.0831.2991.5161.7322.1652.5982.5983.0313.4643.897
4.334.763
1200 MPa1080 MPa
d (mm)M 8M 10M 12M 16M 20M 24M 27p (mm)1.251.51.7522.533d2 (mm)7.1889.02610.8614.718.3822.0525.05d1 (mm)6.6478.37610.1113.8317.2920.7523.75
M 30M 36M 42M 483.544.5527.7333.439.0844.7526.2131.6737.1342.59
M 565.552.4350.05
mm234.755.180.21150.3234.9338.2443.1539.6787.[1**********]67
kN 28.1144.6364.97121.8190.3274358.9437.1638.[1**********]3t 2.8684.5556.62912.4319.4127.9636.6244.665.1189.49117.7162.6k= 0.12
扳手力矩T=K*F0*dN*mkg*m26.9853.5693.55233.8456.[**************]62.7535.4659.54623.8646.5980.52118.7160.6281.[***********]78.21093