锥管螺纹拧紧力矩4篇.docx
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锥管螺纹拧紧力矩4篇.docx
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锥管螺纹拧紧力矩4篇
锥管螺纹拧紧力矩(4篇)
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常用螺纹一般拧紧力矩(N.m)螺纹直径/mm螺栓强度级别
4.65.6
6.6
10.9螺纹直径/mm螺栓强度级别
4.65.6
6.6
10.9
M6
3.43
4.51
5.10
11.37
M8
8.23
10.98
12.35
27.54
M10
16.37
12.05
24.5
54.9
M12
28.4
38.2
43.1
95.1
M14
45.1
60.8
68.6
147
M16
70.6
94.1
106.8
235
M18
98
130
146
323
M20
137
184
208
461
M22
251284
627
M24
235
319
359
794
M30
470
637
715
1588
M36
833
11071245
2764
M48注:
螺母预紧力矩的计算公式为:
T=KFdK=0.15~0.2;F――螺栓预紧力;d――螺纹直径。
3.1螺栓预紧力推荐表
序号强度等级
4.8
6.8
8.8
10.9
12.9最小破断强度392MPa588MPa784MPa941MPa1176MPa材质一般构造用钢机械构造用钢铬铝合金钢镍铬铝合金钢
镍铬合金钢螺栓对边N.mkg.mN.mkg.mN.mkg.mN.mkg.mN.mkg.m
1M14
22
697
98
10
137
14
165
17
226
23
2
M16
24
98
10
137
14
206
21
247
25
353
36
3
M18
27
137
14
206
21
284
29
341
35
481
49
4
M20
30
177
18
275
28
402
41
569
58
677
69
M22
32
226
23
333
34
539
55
765
78
912
93
6
M24
36
314
32
471
48
686
70
10011771207M2741
44145
637651030
1051472
1501765
1808M3046
58860883
9012261251962
2002354
2409M3350
735751128
1151471
1502060
2102452
25010M36
55981
100
1471
150
1765
180
2453
250
2942
300
11
M39
60
1177
120
1765
180
2157
220
2943
300
3628
370
12
M42
65
1520
155
2354
240
2746
280
3826
390
4609
470
13
M45
70
1765
180
2746
280
3138
320
4415
450
5394
550
14
M48
75
2256
230
3432
350
3923
400
5592
570
6669
680
15
M52
80
2746
280
4119
420
4707
480
6573
670
8336
850
16
M56
85
3530
360
5198
530
5982
610
8437
86010297
105017M60
90402141059826107747790107911100132391350
18M64
95500151074537608826
900
19
M68
100
5688
580
8532
870
10787
1100
20
M72
105
6672
660
9807
1000
12651
1290
21
M76
110
7355
750
10787
1100
14710
1500
22
M80
1158140
830
12256
1250
18142
1850
23
M85
120
8826
900
13729
1400
220652250
24
M90
130
10591
1080
16181
1650
24517
2500
25
M100
145
13729
1400
20104
2500
26
M110
155
16377
167025007
2550
27
M120
175
19907
2030
29910
3050
28
M125
180
注:
表中数值为最大力矩值,建议锁紧力矩值为:
表中数据×(70~80)%。
螺纹规则拧紧力矩(N.m)
性能等级5.6性能等级8.8性能等级10.9M65-76-1011-14M812-1519-2422-29M8×114-1821-2824-31M1024-3035-4743-53M101×.2528-3241-5348-59M1013×0-3642-54
51-58M1242-5360-7280-101M121.×544-5666-8288-107
M12×1.2547-6072-8594-114M1472-8796-126144-175M14×1.580-96106-132160-204M16108-127156-200199-234M16×1.5116-144168-204214-252M18156-180192-226240-260M18×1.5162-192204-240250-300M20216-243312-372384-439M201.5×240-264324-384433-480另外还可以根据T=kDF来计算拧紧扭矩,其中,k是扭矩系数,D是公称直径,F是螺栓预紧力
中华人民共和国汽车行业标准
汽车用螺纹紧固件拧紧力矩规范
本标准适用于碳素钢或合金钢制造的螺纹直径为6-20㎜、6
级精度以上的汽车用一般螺栓、螺钉、螺柱和螺母的紧固。
其螺纹尺寸及公差按GB193-1981《普通螺纹直径与螺距系列》、GB196-1981《普通螺纹基本尺寸》和GB197-1981《普通螺纹公差与配合》标准的规范;螺栓、螺钉、螺柱和螺母机械性能,螺栓、螺钉、螺柱与螺母被拧入基体件强度级别的组合按GB3098-1982《紧固件机械性能》标准的规本标准不适用于承受交变载荷或加润滑剂装配的螺栓、螺钉、螺柱和螺母的紧固件,以及紧定螺钉和类似的不规定抗拉强度的螺纹紧固件。
1、汽车用螺纹紧固件拧紧力矩国家机械工业局1999-03-15批准实施
附录
螺纹紧固件的拧紧力矩
在拧紧螺母时,其拧紧扭矩M需要克服被旋合螺纹间的摩擦力矩和螺母与被联接件(或垫圈)支承面之间的摩擦力矩,并使联接产生预紧力P。
,它们的关系为
M=KP。
d×10-3
式中:
M——拧紧扭矩,Nm
K——拧紧扭矩系数;P。
——预紧力,N;d——螺纹直径,㎜。
要想得到规定的预紧力,应进行的量的实验求出拧紧扭矩系数的实际数值,通过以上的关系计算,把一定大小的扭矩施加到螺母上就能得到。
通过实验和数学分析得出,汽车用普通螺纹紧固件拧紧扭矩系数的平均值为0.284。
对于表1-表4中未规定的各级机械性能的螺纹紧固件的拧紧扭矩,可按(A2)、(A3)、(A5)经验公式计算确定。
螺纹紧固件最大拧紧扭矩为
Mmax=0.170σsAsd10×-3式中Mmax——最大拧紧扭矩,Nm
σs——螺纹紧固件的屈服强度N/mm2;As——螺纹部分有效面积,mm2。
AS=(d2+d32
)
42式中:
d2——螺纹中径,㎜;
d3=d1-H/6,㎜;
d1——螺纹小径,㎜;H=0.866p,㎜;p——螺距,㎜。
螺纹紧固件标准拧紧扭矩为
M=0.142σsAsd1×0-3螺纹紧固件最小拧紧扭矩为
Mmin=0.114σsAsd1×0-3
式中:
Mmin——最小拧紧扭矩,Nm。
篇四
螺纹联接的拧紧力矩计算
Mt=K×P0×d×10-3
N.m
K:
拧紧力系数d:
螺纹公称直径P0:
预紧力
P0=σ0×AsAs也可由下面表查出
As=π×ds2/4ds:
螺纹部分危险剖面的计算直径ds=
(d2+d3)/2d3=d1-H/6H:
螺纹牙的公称工作高度
σ0=(0.5~0.7)σsσs――――螺栓材料的屈服极限N/mm2(与强度等级相关,材质决定)
K值查表:
(K值计算公式略)
K值
摩擦表面状况
有润滑
精加工表面一般加工表面表面氧化镀锌干燥的粗加工表面
无润滑
σs查表:
螺纹性能等级σs或σ0.2N/mm2
As查表:
螺纹公称直径d/mm
33.545
6
公称应力截面积
As/mm25.036.788.7814.220.128.936.65884.[***********][1*
]17
通过计算得到螺栓联接拧紧力矩如下表所示:
3.64.64.85.65.86.88.89.810.912.[***********][1**********]0
80
表面被氧化(无润滑)的螺纹联接的拧紧力矩值(单位:
N.m)性能等级3.64.6
4.85.6
5.8
6.8
8.8
9.810.9
12.9
螺纹直径
d/mmmin345678
maxmin0.430.681.012.043.475.838.43max0.610.961.422.864.868.16
min0.580.911.352.734.63
max0.811.281.893.826.48
min0.540.851.262.564.347.2810.5420.8836.4257.96
max0.761.201.773.586.0810.2014.7629.2350.9881.14
min0.721.141.693.415.799.7114.0527.8448.56
max1.011.592.364.778.1013.5919.6838.9867.98
min0.871.372.024.096.9511.6516.8733.4158.27
max1.221.912.835.739.73
min1.161.822.705.459.26
max1.622.553.787.6312.9721.7531.4862.36
min1.302.053.036.1310.4217.4825.3050.11
max1.832.874.258.5914.5924.4735.4270.16
min1.632.563.797.6713.0221.8531.6262.64
max2.283.595.3110.7418.2330.5944.2787.70
min1.963.084.55
max2.744.316.37
0.330.460.761.061.532.152.603.654.376.126.328.85
3.50.510.72
9.2012.8815.6321.8826.2236.7137.9553.1375.17
105.247.7710.8816.3115.5423.6122.4946.7744.54
11.8111.2415.74
1012.5317.5416.7023.3922.2731.181221.8530.5929.1340.79
38.8554.381434.7848.6946.3764.9261.8286.5516
54.2675.9672.35101.2896.46135.05
81.58
77.69108.7787.40122.36109.25152.95131.10183.5477.28108.1
9
92.74129.83123.65173.11139.10194.75173.88243.43208.66292.
1290.43126.60120.58168.81144.69202.57192.92270.09217.043
03.85271.30379.81325.56455.7818
74.65104.5199.53139.35132.71185.79124.42174.18165.89232.2
4199.07278.69265.42371.59298.60418.04373.25522.55447.906
27.0620
105.84148.18141.12197.57188.16263.42176.40246.96235.2032
9.28282.24395.14376.32526.85423.36592.70529.20740.88635.
04889.0622
143.99201.58191.98268.77255.97358.36239.98335.97319.9744
7.96383.96537.55511.95716.73575.94806.32719.931007.90863.
911209.4824
183.00256.19243.99341.59325.32455.45304.99426.99406.6656
9.32487.99683.18650.65910.91731.981024.77914.981280.9710
97.971537.1627
267.69374.76356.92499.69475.89666.25446.15624.61594.8683
2.81713.84999.37951.781332.501070.761499.061338.441873.8
21606.132248.5930
363.53508.94484.70678.59646.27904.78605.88848.23807.8411
30.98969.411357.171292.541809.561454.112035.761817.64254
4.702181.173053.6433
494.68692.56659.58923.41879.441231.21824.471154.261099.3
01539.011319.161846.821758.872462.421978.732770.232473.4
23462.782968.104155.3436
635.30889.42847.071185.891129.421581.191058.831482.36141
1.781976.491694.132371.782258.843162.382541.203557.683176.504447.093811.805336.51表面被氧化(有润滑)的螺纹联接的拧紧力矩值(单位:
N.m)性能等级3.6
4.6
4.8
5.6
5.8
6.8
8.8
9.8
10.9
12.9
螺纹直径
d/mmmin345678
maxmin0.360.570.841.702.894.867.03maxminmax
min0.450.711.052.133.626.078.78
max0.631.001.482.985.078.5012.30
min0.600.951.402.844.828.0911.7123.2040.4664.40
max0.851.331.973.986.7511.3316.4032.4856.6590.16min0.721.141.693.415.799.7114.0527.8448.56max1.011.592.364.778.10
min0.971.522.254.547.72
max1.352.133.156.3610.8118.1326.2351.9790.64
min1.091.712.535.118.6814.5721.0841.76
max1.522.393.547.1612.1620.3929.5158.46
min1.362.143.166.3910.8518.2126.3552.20
max1.902.994.438.9515.2025.4936.8973.08
min1.632.563.797.6713.0221.8531.6262.64
max2.283.595.3110.7418.2330.5944.2787.70
0.270.380.630.891.281.792.173.043.645.105.277.38
0.510.480.680.800.761.061.181.121.572.392.273.184.05
3.865.406.806.479.069.849.3713.12
3.50.430.60
13.5912.9519.6818.7438.9837.1267.9864.74
1010.4414.6213.9219.4918.5625.9817.4024.3612
18.2125.4924.2833.9932.3745.3230.3542.4914
28.9840.5738.6454.1051.5272.1348.3067.62
72.84101.9791.04127.46109.25152.9577.28108.19103.04144.2
6115.92162.29144.90202.86173.88243.4316
45.2263.3060.2984.4080.38112.5475.36105.50100.48140.67120
.58168.81160.77225.08180.86253.21226.08316.51271.30379.81
18
62.2187.0982.94116.12110.59154.83103.68145.15138.24193.54
165.89232.24221.18309.66248.83348.36311.04435.46373.2552
2.5520
88.20123.48117.60164.64156.80219.52147.00205.80196.00274.
40235.20329.28313.60439.04352.80493.92441.00617.40529.20
740.8822
119.99167.98159.98223.98213.31298.64199.98279.97266.6437
3.30319.97447.96426.62597.27479.95671.93599.94839.92719.
931007.9024
152.50213.49203.33284.66271.10379.55254.16355.82338.8847
4.43406.66569.32542.21759.09609.98853.98762.481067.47914
.981280.9727
223.07312.30297.43416.40396.58555.21371.79520.51495.7269
4.01594.86832.81793.151110.41892.301249.211115.371561.52
1338.441873.8230
302.94424.12403.92565.49538.56753.98504.90706.86673.2094
2.48807.841130.981077.121507.971211.761696.461514.702120.581817.642544.7033
412.24577.13549.65769.51732.861026.01687.06961.88916.081
282.511099.301539.011465.732052.021648.942308.522061.182
885.652473.423462.7836
529.42741.18705.89988.24941.181317.66882.361235.301176.481647.071411.781976.491882.372635.322117.662964.732647.083705.913176.504447.09镀锌(无润滑)的螺纹联接的拧紧力矩值(单位:
N.m)性能等级3.6
4.6
4.8
5.6
5.8
6.8
8.8
9.8
10.9
12.9螺纹直径
d/mmmin345678
maxmin0.400.630.931.873.185.347.73max0.560.881.302.624.467.48min0.530.841.242.504.257.12max0.741.171.733.505.949.97min0.500.781.162.343.986.689.66max0.701.101.623.285.579.3513.53min0.661.041.553.125.318.9012.8825.5244.5170.84max0.931.462.164.377.4312.4618.0435.7362.3199.18min0.801.251.853.756.3710.6815.4630.6253.4185.01max1.121.752.605.258.91min1.061.672.475.008.49
max1.492.343.467.0011.8919.9428.8657.1699.70min1.201.882.785.629.5516.0223.1945.9480.12max1.672.633.897.8713.3722.4332.4764.31min1.492.353.487.0311.9420.0328.9957.42max2.093.294.879.8416.7228.0440.5880.39min1.792.824.178.43max2.513.955.8411.81
0.300.420.700.971.411.972.393.
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