JBT7382-1994吊环螺母.pdf

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1、J13JB/T7382－1994吊环螺母1994-07-26发布1995-07-01实施中华人民共和国机械工业部发布中华人民共和国机械行业标准JB/T7382－1994吊环螺母1主题内容与适用范围本标准规定了螺纹规格为M8～M100×6的吊环螺母。本标准适用于起吊机械、器具等一般装卸用。注：商品紧固件品种，应优先选用。2引用标准GB90紧固件验收检查、标志与包装GB196普通螺纹基本尺寸(直径1～600mm)GB197普通螺纹公差与配合(直径1～355mm)GB230金属洛氏硬度试验方法GB699优质碳素结构钢技术条件GB1237

2、紧固件的标记方法GB5267螺纹紧固件电镀层GB6394金属平均晶粒度测定法3型式、尺寸与最大起吊重量3.1型式和尺寸按图1及表1规定。图1机械工业部1994-07-26批准1995-07-01实施12表1mm螺纹规格DM8M10M12M16M20M24M30M36M42M48M56M64M72×6M80×6M100×6max9.111.113.115.217.421.425.730.034.440.744.751.463.871.879.2d1min7.69.611.613.615.619.623.527.531.237.141

3、.146.958.866.873.6公称20242834404856678095112125140160200D1max20.424.428.434.540.648.656.667.780.996.1113.1126.3141.5161.5201.7min19.023.027.032.938.846.854.665.578.192.9109.9122.3137.0157.0196.7max21.125.129.135.241.449.457.769.082.497.7114.7128.4143.8163.8204.2d2min19

4、.623.627.633.639.647.655.566.579.294.1111.1123.9138.8158.8198.6max9.511.512.514.517.521.526.532374247.552.562.57383h1JB/T7382min89.510.512.515.019.0242934394449586979d3（参考）364452627288104123144171196221260296350h1823263135455565758595105130150165－1994r1446681215182022

5、2525353540b101214161924283238465058728088JB/T7382－19943.2最大起吊重量按表2的规定。表2tM72M80M100螺纹规格DM8M10M12M16M20M24M30M36M42M48M56M64×6×6×6单螺母0.160.250.40.6311.62.546.381016202540起吊双螺母0.080.130.20.320.50.81.323.2458101320起吊4标记4.1标记方法按GB1237规定。4.2标记示例螺纹规格为20mm、材料为20钢、经正火处理、不经表面处

6、理的吊环螺母的标记：螺母JB/T7382M205技术条件5.1技术要求5.1.1吊环螺母应采用20或25钢(GB699)制造。5.1.2吊环螺母必须经整体锻造。锻件应进行正火处理，并清除氧化皮。成品的晶粒度应不低于GB6394中5级的规定。5.1.3锻件的允许错移量和允许残余毛边量按表3规定。表3mm螺纹规格DM8～M20M24～M48M56～M100×6允许错移量（max）0.50.81允许残余毛边量外缘0.61（max）内孔0.250.55.1.4螺纹轴线对支承面的垂直度公差t按表4的规定。表4mm螺纹规格DM8M10M12M

7、16M20M24M30M36t0.280.340.390.470.560.670.780.94螺纹规格DM42M48M56M64M72×6M80×6M100×6t1.121.331.561.751.952.232.793JB/T7382－19945.1.5锻件不准有过烧、裂纹等锻造缺陷。5.1.6螺纹基本尺寸按GB196，公差按GB197的7H级规定。5.1.7机械性能5.1.7.1吊环螺母应进行轴向保证载荷试验，其载荷按表5规定。试验后不允许有裂纹，环部永久变形的变形率不得大于0.5%表5kN螺纹规格DM8M10M12M16M2

8、0M24M30M36轴向保证载荷3.25812.520325080螺纹规格DM42M48M56M64M72×6M80×6M100×6轴向保证载荷1251602003204005008005.1.7.2吊环螺母应进行硬度试验，其硬度值应符合67～95