(高清版)GB∕T 37462-2019 30°楔形防松螺纹

ICS21.040.30Lockingthreadswith30degree国家市场监督管理总局中国国家标准化管理委员会IGB/T37462—2019本标准按照GB/T1.1—2009给出的规则起草。请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别这些专利的责任。本标准由全国螺纹标准化技术委员会(SAC/TC108)提出并归口。本标准起草单位：上海施必牢机械设备有限公司、中机生产力促进中心。1GB/T37462—2019本标准适用于防松紧固螺纹联接。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文GB/T192普通螺纹基本牙型GB/T196普通螺纹基本尺寸GB/T197普通螺纹公差GB/T3934普通螺纹量规技术条件GB/T14791螺纹术语GJB3.1AMJ螺纹第1部分：通用要求HB4228MJ螺纹环规(MJ1.6×0.35～MJ39×2)3术语和代号GB/T14791界定的术语和定义适用于本文件。d———外螺纹大径d₂p——塞规螺纹中径d₃-—外螺纹小径dsp——塞规螺纹(牙顶)斜面小径d₅t——丝锥螺纹(牙顶)斜面小径dp——塞规螺纹平顶大径d,——丝锥螺纹(牙顶)斜面大径D—-—内螺纹(牙底)斜面大径D₁——内螺纹牙顶小径2GB/T37462—2019D₂——内螺纹中径D₅———内螺纹(牙底)斜面小径P———螺距Tp——内螺纹涂镀前的斜面大径和斜面小径公差以及中径公差Tp₁——内螺纹涂镀前的牙顶小径公差Tdp——塞规螺纹直径公差4牙型30°楔形防松内螺纹的牙型应符合图1的规定(粗实线)。外螺纹有普通螺纹(M)和MJ螺纹两种，其牙型应分别符合GB/T192和GJB3.1A的规定。5公差和极限尺寸30°楔形防松螺纹有两种配合公差：精密级(4H/4h)和中等级(30°楔形防松内螺纹斜面大径和斜面小径与其中径具有相同的公差值(4H或6H)。30°楔形防松内螺纹公差带位置见图2(剖面线部分)。精密级和中等级内螺纹涂镀前的公差和直径极限尺寸应分别符合表1和表2的规定。表1和表2内的斜面大径和斜面小径数值是牙底斜面与牙侧延长相交所形成的理论直径值。本标准不规定涂镀后内螺纹的直径极限尺寸及其检验方法。M外螺纹的基本尺寸和公差(4h和6g)应分别符合GB/T196和GB/T197的规定。MJ外螺纹的基本尺寸和公差(4h和6g)应符合GJB3.1A的规定。注：在用户允许条件下，内螺纹斜面小径的最小值可以小于表1和表2的规定下限。3GB/T37462—2019P内螺纹表1精密级(4H)内螺纹的涂镀前公差和直径极限尺寸单位为毫米螺纹规格斜面大径D斜面小径D₅牙顶小径D₁斜面大径和斜面小径公差牙顶小径公差公称直径螺距maxminmaxminmaxmin55.1545.0744.71]4.6314.4044.3040.0800.100616.1886.0935.6465.5515.2395.1190.0950.120717.1887.0936.6466.5516.2396.1190.0950.120818.1888.0937.6467.5517.2397.1190.0950.12088.2168.1167.5437.4437.0306.8940.1000.13619.6469.5519.2399.1190.0950.1209.5439.4439.0308.8940.1000.1369.4609.3488.8098.6570.1120.1520.1120.1360.1180.1520.1250.1700.1180.15220.1320.1890.1180.15220.1320.1890.1180.15220.1320.1890.1400.22420.25720.1390.1180.1524GB/T37462—2019表1(续)单位为毫米螺纹规格斜面大径D牙顶小径D₁斜面大径和斜面小径公差牙顶小径公差Tpi公称直径螺距maxminmaxminmaxmin220.31820.1860.1320.18920.37220.2320.1400.22422.25722.13921.46021.34220.81520.6630.1180.152222.31822.18621.30021.16820.42420.2350.1320.18922.37222.23221.11720.97720.0000.1400.22424.26424.13923.46023.33522.82222.6700.1250.152224.32624.18623.30023.16022.43222.2430.1400.189324.44824.27822.95922.78921.56521.3130.1700.25227.26427.13926.46026.33525.82225.6700.1250.152227.32627.18626.30026.16025.43225.2430.1400.189327.44827.27825.95925.78924.56524.3130.1700.25230.26430.13929.46029.33528.82228.6700.1250.152230.32630.18629.30029.16028.43228.2430.1400.18930.50530.32528.76528.58527.15326.8690.1800.284233.32633.18632.30032.16031.43231.2430.1400.18933.50533.32531.76531.58530.15329.8690.1800.284236.32636.18635.30035.16034.43234.2430.1400.189336.44836.27834.95934.78933.56533.3130.1700.252436.56136.37134.59134.40132.70332.4030.1900.300239.32639.18638.30038.16037.43237.2430.1400.189339.44839.27837.95937.78936.56536.3130.1700.252439.56139.37137.59137.40135.70335.4030.1900.300注：螺纹牙侧位置决定螺纹中径的大小；螺纹中径决定牙底斜面的长短。在30°牙侧角和斜面倾角条件下，斜面大径和斜面小径与螺纹中径的数学关系为D₂=2D-D₅—0.866025404P。表2中等级(6H)内螺纹涂镀前的公差和直径极限尺寸单位为毫米螺纹规格斜面小径D₅牙顶小径D₁斜面大径和斜面小径公差牙顶小径公差公称直径螺距maxminmaxminmaxmin9.4289.2488.8938.6570.1800.2360.1900.2360.2000.2655GB/T37462—2019表2(续)单位为毫米螺纹规格斜面大径D斜面小径D;牙顶小径D₁斜面大径和斜面小径公差牙顶小径公差公称直径螺距maxminmaxminmaxmin0.1900.23620.2120.3000.1900.23620.2120.3000.1900.23620.2120.3000.2240.35520.27920.0890.1900.236220.33020.1180.2120.30020.37220.1480.2240.35522.27922.08921.43221.24220.89920.6630.1900.236222.33022.11821.24421.03220.53520.2350.2120.30022.37222.14821.03320.80920.1310.2240.355224.34224.11823.24823.02422.54322.2430.2240.300324.44224.17722.85222.58721.71321.3130.2650.400227.34227.11826.24826.02425.54325.2430.2240.300327.44227.17725.85225.58724.71324.3130.2650.400230.34230.11829.24829.02428.54328.2430.2240.30030.48730.20728.62928.34927.31926.8690.2800.450233.34233.11832.24832.02431.54331.2430.2240.30033.48733.20731.62931.34930.31929.8690.2800.450336.44236.17734.85234.58733.71333.3130.2650.400436.53636.23634.43134.13132.87832.4030.3000.475339.44239.17737.85237.58736.71336.3130.2650.400439.53639.23637.43137.13135.87835.4030.3000.475中等级公差只用于螺距不小于1.5mm的螺纹规格。注：螺纹牙侧位置决定螺纹中径的大小；螺纹中径决定牙底斜面的长短。在30°牙侧角和斜面倾角条件下，斜面大径和斜面小径与螺纹中径的数学关系为D₂=2D—D₅—0.866025404P。6螺纹配合位置要保证外螺纹牙顶与内螺纹牙底斜面接触配合，应按图3箭头方向施加预紧力。6GB/T37462—20197.1基本标记30°楔形防松内螺纹的特征代号为“RL螺纹尺寸代号为“公称直径×螺距”,公称直径和螺距的数值单位为毫米。精密级内螺纹的公差带代号为4H;中等级内螺纹的公差带代号为6H。旋合长度分组方法应符合GB/T197的规定。对短旋合长度组和长旋合长度组螺纹，应在公差带代号后分别标注“S”和“L”代号。旋合长度代号与公差带代号间用“-”号分开。中等旋合长度组螺纹不标注旋合长度代号(N)。(RH)。示例1:RLM12×1.5-6H示例2:RLM12×1.5-4H-S示例3:RLM12×1.5-6H-LHM和MJ外螺纹的标记方法应分别符合GB/T197和GJB3.1A的规定。7.2螺纹副7GB/T37462—2019内螺纹塞规的种类和螺纹尺寸参见附录A。M和MJ外螺纹环规应分别符合GB/T3934和HB4228的规定。可使用通用检具检验外螺纹大径。9螺纹丝锥丝锥的螺纹尺寸参见附录B。10小直径楔形防松螺纹公称直径范围为1mm～4mm的30°楔形防松螺纹应符合附录C的规定。8GB/T37462—2019(资料性附录)A.1螺纹塞规螺纹通端塞规检验内螺纹涂镀前的最小斜面大径和最小牙槽宽度。螺纹止端塞规检验内螺纹涂镀前的最大斜面大径。通端和止端塞规的螺纹牙型分别见图A.1和图A.2(粗实线)。斜面倾角和螺纹牙侧角为30°。螺纹塞规直径公差带位置见图A.3。精密级和中等级螺纹塞规的公差和直径极限尺寸分别参见表A.1和表A.2。螺纹塞规的累积螺距及斜面倾角和牙侧角极限偏差参见表A.3。螺纹通端塞规应旋合通过工件内螺纹；螺纹止端塞规旋入工件内螺纹的长度应不超过两个螺距。通端塞规Y图A.1螺纹通端塞规的螺纹牙型c3…c3…ax二ammh内螺纹止端寒规图A.2螺纹止端塞规的螺纹牙型9GB/T37462—2019通规图A.3塞规直径的公差带位置表A.1精密级(4H)螺纹塞规的公差和直径极限尺寸单位为毫米螺纹规格量规直径公差平顶大径dp中径d₂p通规磨损下限平顶大径dp斜面小径ds(中径d2p)止规磨损下限公称直径螺距minminminminminminmaxminmin5617181812222表A.1(续)单位为毫米二螺纹规格量规直径公差Tdp平顶大径dp斜面小径dsp中径d₂p通规磨损下限平顶大径dp斜面小径dsp(中径d₂p)止规磨损下限螺距maxmaxmaxmaXmax2232322234234螺纹规格量规直径公差Tdp平顶大径dp中径d₂p通规磨损下限平顶大径dp斜面小径ds(中径d2p)止规磨损下限螺距222222323螺纹规格量规直径公差Tdp平顶大径dp斜面小径dsp中径d2p通规磨损下限平顶大径dp斜面小径dsp(中径d₂p)止规磨损下限公称直径螺距maxminmaxminmaxminminminmaxminmaxminmin223434注：螺纹中径尺寸是塞规的验收参数。GB/T37462—2019表A.3螺纹塞规的累积螺距及斜面倾角和牙侧角极限偏差极限偏差斜面倾角和牙侧角极限偏差螺纹规格累积螺距极限偏差斜面倾角和牙侧角极限偏差公称直径螺距公称直径螺距5士0.00561士0.004士152士107181士0.004士15士128士0.0042士0.00513士0.005士9士0.0042士0.004士133士0.005士9士0.004士0.005士0.0042士10士0.004士122士0.0042士0.0052士0.005士102士0.006324士0.0052士0.00532士0.005士104士0.006士8士0.005士10A.2光滑塞规用通用检具或光滑塞规检验内螺纹涂镀前的牙顶小径。光滑塞规的直径公差带位置见图A.3。光滑通端塞规应通过工件内螺纹；光滑止端塞规进入工件内螺纹的长度应不超过一个螺距。GB/T37462—2019(资料性附录)丝锥螺纹尺寸B.1丝锥螺纹牙型丝锥螺纹牙型见图B.1。斜面倾角和螺纹牙侧角为30°。B.2丝锥螺纹公差丝锥螺纹有两种公差：H1和H2。H1和H2丝锥分别用于加工4H和6H内螺纹。丝锥螺纹的公差带位置见图B.1。B.3丝锥螺纹的极限尺寸和极限偏差丝锥螺纹的直径极限尺寸参见表B.1。丝锥螺纹的累积螺距和牙侧角极限偏差参见表B.2。内螺纹公差带丝锥螺纹公差带内螺纹最小实体牙型内螺纹最大实体牙型丝锥牙型公差带图B.1丝锥螺纹的牙型和公差带位置GB/T37462—2019表B.1丝锥螺纹的直径极限尺寸单位为毫米螺纹规格公称直径螺距斜面小径ds中径d₂b斜面小径ds中径d₂.bmaxminmaxminmaxminmaxminmaxminmaxmin55.1045.0844.6614.6414.8544.834616.1286.1055.5865.5635.8045.781717.1287.1056.5866.5636.8046.781818.1288.1057.5867.5637.8047.78188.1548.1297.4817.4567.7447.71919.5869.5639.8049.7819.4819.4569.7449.7199.3909.3629.6739.6459.3189.2909.7019.67322220.18420.15420.16420.134220.23720.20320.20320.16920.28620.25020.23820.20222.18422.15421.38721.35721.68221.65222.16422.13421.31721.28721.71221.682222.23722.20321.21921.18521.52321.48922.20322.16921.11721.08321.55721.52322.28622.25021.03120.99521.37621.34022.23822.20220.89920.86321.41221.37624.18724.15523.38323.35123.69223.660224.24024.20423.21423.17823.53423.49824.20824.17223.11423.07823.57023.534324.34224.29922.85322.81023.23323.19024.28324.24122.69322.65123.27523.23327.18727.15526.38326.35126.69226.660227.24027.20426.21426.17826.53426.49827.20827.17226.11426.07826.57026.534327.34227.29925.85325.81026.23326.19027.28327.24125.69325.65126.27526.23330.18730.15529.38329.35129.69229.660—————230.24030.20429.21429.17829.53429.49830.20830.17229.11429.07829.57029.53430.39230.34728.65228.60729.10129.05630.31930.27428.46128.41629.14629.101233.24033.20432.21432.17832.53432.49833.20833.17232.11432.07832.57032.534螺纹规格公称直径螺距斜面小径ds中径d₂b斜面大径da斜面小径ds中径d₂tbminminminminminmin33.39233.34731.65231.60732.10132.05633.31933.27431.46131.41632.14632.101236.24036.20435.21435.17835.53435.498———336.34236.29934.85334.81035.23335.19036.28336.24134.69334.65135.27535.233436.44236.39534.47234.42534.94834.90136.35436.30734.24934.20234.99534.948239.24039.20438.21438.17838.53438.498—————339.34239.29937.85337.81038.23338.19039.28339.24137.69337.65138.27538.233439.44239.39537.47237.42537.94837.90139.35439.30737.24937.20237.99537.948在确保螺纹可装配条件下，可采用圆弧牙顶丝锥。最大圆弧半径为(dmin-dmax)/30-5。为确定丝锥制造工艺，本表给出丝锥螺纹中径极限尺寸。它不是丝锥的验收参数。螺纹规格累积螺距牙侧角极限偏差螺纹规格累积螺距牙侧角极限偏差公称直径螺距极限偏差mm累计牙数公称直径螺距极限偏差mm累计牙数5士0.0089士30士0.008761士0.008927士2071士0.0089士0.0107819士257士2589士252士0.0107士20193士0.0127士0.00897士0.0087士252士0.0107士20士0.0089士253士0.0127士20士0.0087士257士0.0097士20277士25士0.01372727士0.0087士25士0.01372士0.0107士202士0.0107士20士0.0087士2537士20274士0.0147士0.010727士20士0.00873士0.01272士0.0107士204士0.0147士15士0.0107士20(规范性附录)公称直径范围为1mm～4mm的30°楔形防松螺纹C.1小直径楔形防松螺纹代号d₁st——丝锥螺纹小径d₂sp——塞规螺纹中径d2st——丝锥螺纹中径dsp——塞规螺纹大径dgt——丝锥螺纹大径D₁s—--内螺纹小径D₂s——内螺纹中径Tdsp——塞规螺纹直径公差C.2内螺纹牙型P内螺纹DDP/8图C.1小直径30°楔形防松内螺纹的牙型和公差带位置C.3内螺纹公差和极限尺寸GB/T37462—2019小直径30°楔形防松内螺纹的公差带位置见图C.1(剖面线部分)。小直径30°楔形防松内螺纹涂镀前的公差和直径极限尺寸应符合表C.1的规定。表C.1小直径30°楔形防松内螺纹涂镀前的公差和直径极限尺寸单位为毫米螺纹规格直径公差Tps公称直径螺距maxminmaxminmaxmin10.250.9640.9190.8830.8380.0450.250.0450.0480.350.0530.350.05322.0992.0430.0560.452.6092.5492.4142.3542.2682.2080.06033.1173.0542.9002.8372.7382.6750.0633.6363.5653.3763.3053.1813.1100.07144.1514.0763.8483.7733.6213.5460.075C.4内螺纹量规小直径螺纹塞规的公差和直径极限尺寸应符合表C.2和表C.3的规定。螺纹塞规的累积螺距和牙侧角极限偏差应符合表C.4的规定。螺纹通端塞规应旋合通过工件内螺纹；螺纹止端塞规旋入工件内螺纹的长度应不超过两个螺距。用通用检具或光滑塞规检验内螺纹涂镀前的小径。光滑塞规的直径公差带位置见图A.3。光滑通端塞规应通过工件内螺纹；光滑止端塞规进入工件内螺纹的长度应不超过一个螺距。表C.2小直径螺纹通端塞规的公差和直径极限尺寸单位为毫米螺纹规格中径d₂sp大径dsp小径d1s直径公差Tdsp新塞规磨损公称直径螺距maxminminmaxminmax10.250.9250.9190.9160.8380.0060.250.0060.0060.350.0070.350.00722.0072.0000.0070.452.3612.3542.3512.5072.5002.2080.00732.8442.8372.8343.0073.0002.6750.0073.3123.3053.30