紧固件进厂检验规程

---贵阳高原矿山机械股份有限公司企业标准紧固件进厂检验规程目的规范及指导检验人员对紧固件的进厂检验工作，确保紧固件的质量。适用范围本规程适用于紧固件的进厂检验。检验依据标准GB/T5783《六角头螺栓一全螺纹-A和B级》标准GB/T6170《1型六角头螺母一A和B级》标准GB/T6171《1型六角头螺母一细牙一A和B级》标准GB93《标准型弹簧垫圈》抽样抽样方法对于批量，按5%进行抽样，如全部合格，则批件合格；其中有不合格者，加倍抽检；仍有不合格，则该批不合格。检验内容及方法供方资质检查检查供方提供的产品质量合格证书、合格的质量保证体系证书。螺栓、螺母外观、尺寸检查用游标卡尺、钢板尺和卷尺进行尺寸检查应符合表1、表2、表3的规定。表面质量检查目测螺栓头、螺母表面等级标识，螺栓、螺母的螺纹表面不允许有妨碍螺纹自由旋入的碰伤和毛刺；不允许有影响使用的双牙尖，划痕和扣不完整，不允许有影响使用的凹痕、毛刺、裂纹、斑疤、条痕和氧化皮，不允许有浮锈和烧伤。硬度试验只用与于螺栓8.8级，用洛氏硬度机测量其硬度，测量值应符合dWM16HRC为22~32；d>M16HRC为25~35。垫圈外观、尺寸检查目测垫圈表面不允许有裂缝、浮锈和氧化皮。不允许有影响使用的纵向裂缝、凹痕、毛刺。用游标卡尺和台秤检查尺寸和重量，结果应符合表4的规定。贵阳高原矿山机械股份有限公司2013-04-10批准2013-04-15实施

弹性试验标准型、轻型和重型垫圈应按5.4.2条进行弹性试验，试验后的自由高度应不小于1.67S（公称尺寸）。先将弹簧垫圈置于台虎钳上，连续三次压平。再用平垫圈隔开穿在螺栓上，拧紧螺母直至压平。至少保持24小时，取下弹簧垫圈检查其高度（H）。韧性试验将垫圈夹于虎钳和扳手之间，虎钳和扳手之间的距离等于垫圈外径的二分之一，将扳手向顺时针方向缓慢扭转至45°，不允许有裂缝。检验判定5.1~5.4条按4.1抽样方法逐项检查，全部满足要求方为合格。

表1mm螺栓螺纹规格dM3M4M5M6M8M10M12amax1.52.12.433.754.55.25k公称22.83.545.36.47.5Amin1.682.683.353.855.156.227.32max2.122.923.654.155.456.587.68Bmin3.263.765.066.117.21max3.744.245.546.697.79smax5.57810131618minA5.326.787.789.7812.7315.7317.73B7.649.6412.5715.5717.57长度L公称产品等级ABminmaxminmax65.76.3687.78.388109.710.31010101211.612.4121212121615.616.416161616161817.618.418181818182019.620.42020202020202524.625.4252525252525253029.630.4303030303030303534.535.533.736.33535353535354039.40.538.741.3404040404040

54544.545.543.746.345454545455049.550.548.751.35050505050(55)54.455.653.556.3(55)(55)(55)(55)6059.460.658.561.560606060(65)64.465.663.566.5(65)(65)(65)7069.470.668.571.57070708079.480.678.581.58080809089.390.788.391.7909010099.3100.798.3101.7100100续表1mm螺栓螺纹规格dM16M20M24M30M36amax67.5910.512k公称1012.51518.722.5产品等级Amin9.8212.2814.78max10.1812.7215.22Bmin9.7115.1514.6518.2822.08max10.2912.8515.3519.1222.92smax2430364655产品等级A23.6729.6735.384553.8B23.1629.1635长度L公称产品等级ABminmaxminmax65.76.3

87.78.3109.710.31211.612.41615.616.42019.620.42524.625.43029.630.43534.535.533.736.3354039.540.538.741.340404040404544.545.543.746.345454545455049.550.548.751.350505050505554.455.653.556.555555555556059.460.658.561.560606060606564.465.663.566.565656565657069.470.668.571.570707070708079.480.678.581.580808080809089.390.788.391.7909090909010099.3100.798.3101.7100100100100100表2mm长度L公称minmax8078.581.59088.391.710098.3101.7110108.3111.7120118.3121.7130128132140138142150148152160156164180176184200195.4204.6220215.4224.6

240235.4244.6260254.8265.2280274.8285.2300294.8305.2320314.3325.7340334.3345.7360357.3365.7380374.3385.7400394.3405.7420413.7426.3440433.7446.3460453.7466.3480473.7486.3500493.7506.3表3mm螺母螺纹规格DM6M8M10M12(M14)M16(M18)M20DXpM8X1M10X1M12X1.5M14X1.5M16X1.5M18X1.5M20X2mmax5.26.88.410.812.814.815.818Smax10131618212427301000个重量/kg2.325.6710.9916.3225.2834.1244.1961.9螺母螺纹规格DM24(M27)M30M36M42M48M56M64DXpM24X2M27X2M30X2M36X3M42X3M48X3M56X4M64X4mmax21.523.825.63134384551Smax36414655657585951000个重量/kg111.9168234.2370.6598.6957.314201912表4mm垫圈规格（螺纹大径）dS(b)HmWminmax公称minmaxminmax55.15.41.31.21.42.63.250.65

66.16.681.61.51.73.240.888.18.682.122.24.25.251.051010.210.92.62.452.575.26.51.31212.212.93.12.953.256.27.751.55(14)14.214.93.63.43.87.291.81616.216.94.13.94.38.210.252.05(18)18.219.044.54.34.7911.252.252020.221.0454.85.21012.52.5(22)22.523.345.55.35.71113.752.752424.525.565.86.212153(27)27.528.56.86.57.113.6173.43030.531.57.57.27.81518.753.75(33)33.534.78.58.28.81721.254.253636.537.798.79.31822.54.5注：1.尽可能不采用括号内的规格；2.m应大于0表5规格mm22.5345681012(14)