《小五金工程评估细则介绍.docx》由会员分享，可在线阅读，更多相关《小五金工程评估细则介绍.docx（52页珍藏版）》请在课桌文档上搜索。
1、1.螺钉61.1螺纹标志及尺寸61.1.1米制细牙螺纹71.L2米制粗牙螺纹81.1.3英制细牙螺纹81.14英制粗牙螺纹91.2通孔孔径101.3攻螺纹孔孔径111.3.1米制细牙螺纹11132米制粗牙螺纹111.3.3英制细牙螺纹12134英制粗牙螺纹131.3.5板材上孔与板边间巨131.4配合尺寸131.5机械性能131.6 钢板厚度141.7 特殊螺钉151.7.1自攻螺钉151.7.1.1硬化层深度151.7.1.2 硬度161.7.1.3 尺寸161.7.1.4 工作扭力171.7.1.5 结合比与预冲孔寸关181.7.1.6钢板孔径及抽牙rj191.7.2塑料螺钉201.7.2
2、.1螺纹形状201.7.2.2 硬度211.7.2.3 螺纹IR寸211.7.3浮动螺1.7.3.1浮动螺钉形状211.7.3.2基本要求211.8螺钉验证方法22资料:23A.螺钉常见穴型简介23B.常用板材硬度23C.电镀层232.螺母242.1 制造材料242.1.1 材料牌号242.1.2材质化学成份242.1.3机械性能242.1.4螺母材料的选取242.2尺寸及公差252.2.1型号为“S.SS.CLS以及CLSS的自佛螺母尺寸25222型号为SP,专用于不锈钢冲压板件上的自钾螺母尺寸282.2.3型号为H,HN,HNL之易削钢制自锁和防锁螺母的尺寸30224型号为F的自钾螺母尺寸
3、302.2.5尺寸公差322.3压抑要求322.4 配合IR寸352.5 螺母验证方法353.螺柱363.1制造螺柱材料363.1.1材料牌号363.1.2化学成份363.1.3机械性能363.1.4螺柱材料的选取373.2尺寸373.2.1 型号为“SO.SON.SOA.SOS.,的通孔螺柱373.2.1.1 一般尺寸383.2.1.2 螺纹规格和螺柱长度393.2.2 型号为“BSO.BSON.BSOA.BSOS.”的盲孔螺柱403.2.2.1 一般尺寸403.2.2.2 螺纹规格和螺柱长度413.3公差433.4压钟要求433.5螺柱验证方法444.支柱454.1型号为“SO.SON.S
4、OA.SOS”的通孔支柱454.1.1材料牌号454.1.2材质化学成份454.1.3机械性能454.1.4螺柱材料的选取464.1.5一般尺寸464.1.6支柱规格和支柱长度474.1.7公差494.2其它异型支柱494.2.1制造材料49422尺寸494.2.3板材厚度及孔径514.3压抑要求514.4支柱验证方法525.拉钉535.1拉钉制造材料545.2尺寸545.3拉钉验证方法556.弹簧566.1 弹簧制造材料566.2 弹簧钢丝IR寸566.2.1制造弹簧用不锈钢钢丝标准直径56622标准钢丝尺寸偏差576.3弹簧自由长度576.4弹簧外径D576.5弹簧的总圈数576.6弹簧的
5、方编号：时间：2021年X月X日书山有路勤为径，学海无涯苦作舟页码：第5页共48页向576.7弹簧验证方法571.螺钉定义：由头部和螺杆两部份构成的一类紧固件.本手册中包括的螺钉主要有机械螺钉、自攻螺钉、塑料螺钉和浮动螺钉等.机械螺钉：由头部和螺杆两部份构成的一类金属紧固件.主要用于一个带有内螺纹孔的零件与带有通孔的零件之间的紧固联接，不需要螺母配合；也用于带有通孔的零件之间的紧固联接，但要与螺母配合.属可拆卸连接.自攻螺钉：由头部和螺杆两部份构成的一类金属紧固件，但螺杆上的螺纹为专用的自攻螺钉用螺纹.用于紧固联接两个薄的金属构件，使之成为一体，构件上需事先制出小孔.这种螺钉具有较高的硬度,可
6、直接旋入构件的孔中，使构件孔中形成相应的内螺纹.塑料螺钉：由头部和螺杆两部份构成的一类金属紧固件，但螺杆上的螺纹为专用的塑料螺钉用螺纹.可直接旋入塑料件中，用于把一个带通孔的金属（或非金属）零件与一个塑料件紧固联接在一起.浮动螺钉：压抑于冲件预制孔内，用于经常拆装之冲压件的把手螺钉，其结构特点是螺钉本体内包含弹性体.1.1 螺纹标志及尺寸（除非特别指明，适用于所有的螺钉、螺母和螺柱）螺纹分为外螺纹和内螺纹两种，一般螺钉为外螺纹形式，螺母或螺柱为内螺纹形式，常用的螺纹如图示.H：原始三角形高度P：螺距D：内螺纹公称直Hi：螺纹牙高Di：内螺纹小径d2：外螺纹中径di：径d：外螺纹公称直径D2：内
7、螺纹中径外螺纹小径n为每英寸牙数.1.1.1 米制细牙螺纹H=0.866025P4=/0.649519尸D=dH=0.541266Pd=d-1.082532PDl=ChD=d单位mm螺纹标志PHid(D)d2(D2)d(D)Ml0.20.20.1081.0000.8700.783Ml.l0.20.20.1081.1000.9700.883M1.20.20.20.1081.2001.0700.983M1.40.20.20.1081.4001.2701.183M1.60.20.20.1081.6001.4701.383M1.80.20.20.1081.8001.6701.583M20.250.25
8、0.1352.0001.8381.729M2.20.250.250.1352.2002.0381.929M2.50.350.350.1892.5002.2732.121M30.350.350.1893.0002.7732.621M3.50.350.350.1893.5003.2733.121M40.50.50.2714.0003.6753.459M4.50.50.50.2714.5004.1753.959M50.50.50.2715.0004.6754.459M5.50.50.50.2715.0005.1754.959M60.750.750.4066.0005.5135.1881.1.2米制粗
9、牙螺纹7=0.866025P4=40.649519PD=d=0.541266PJ=J-1.082532PD2=d2D=d单位mm螺纹标志PHd(D)d2(D2)d(D)Ml0.250.1351.0000.8380.729MLl0.250.1351.1000.9380.829M1.20.250.1351.2001.0380.929M1.40.30.1621.4001.2051.075M1.60.350.1891.6001.3731.221M1.80.350.1891.8001.5731.421M20.40.2172.0001.7401.567M2.20.450.2442.2001.9081.71
10、3M2.50.450.2442.5002.2082.013M30.50.2713.0002.6752.459M3.50.60.3253.5003.1102.850M40.70.3794.0003.5453.242M4.50.750.4064.5004.0133.688M50.80.4335.0004.4804.134M610.5416.0005.3504.9171.1.3英制细牙螺纹P=25An”=0.866025Pd=(d)25.4D=dHi=0.541266Pd2=(d-0.649519n)X25.4D2=d2J=(J-1.082532n)25.4D=d单位mm螺纹标志(Reference
11、)nPHid(D)d2(D2)No.0-80UNF0.0600-80UNF800.31750.1721.5241.3181.181No.1-72UNF0.0730-72UNF720.35280.1911.8541.6261.473No.2-64UNF0.0860-64UNF640.39690.2152.1841.9281.755No.3-56UNF0.0990-56UNF560.45360.2462.5152.2202.024No.4-48UNF0.1120-48UNF480.52920.2862.8452.5022.271No.5-44UNF0.1250-44UNF440.57730.312
12、3.1752.7992.550No.6-40UNF0.1380-40UNF400.63500.3443.5053.0942.817No.8-36UNF0.1640-36UNF360.70560.3824.1663.7083.401No.10-32UNF0.1900-32UNF320.79380.4304.8264.3104.967No.12-28UNF0.2160-28UNF280.90710.4915.4864.8974.5031.1.4英制粗牙螺纹P=25AnH=0.866025Pd=(d)25.4D=d/=0.541266PJ2=(r7-0.649519n)X25.4D2=d2J=(J-
13、1.082532n)25.4D=d单位mm螺纹标志(Reference)nPHd(D)d2(D2)d(D)No.1-64UNC0.0730-64UNC640.39690.2151.8541.5981.425No.2-56UNC0.0860-56UNC560.45360.2462.1841.8901.694No.3-48UNC0.0990-48UNC480.52920.2862.5152.1721.941No.4-40UNC0.1120-40UNC400.63500.3442.8452.4332.156No.5-40UNC0.1250-40UNC400.63500.3443.1752.7642.
14、487No.6-32UNC0.1380-32UNC320.79380.4303.5052.9902.647No.8-32UNC0.1640-32UNC320.79380.4304.1663.6503.307No.10-24UNC0.1900-24UNC241.05830.5734.8264.1383.680No.12-24UNC0.2160-24UNC241.05830.5735.4864.7984.3411.2通孔孔径WL螺钉连接零件上预制之通孔如图示：通孔孔径之尺寸如下表(单位mm)：螺钉公称直径通孔直径(d)mm1级2级3级4级11.11.21.31.21.31.41.51.41.51.
15、61.81.61.71.821.71.822.11.82.02.12.222.22.42.62.22.42.62.82.32.52.72.92.52.72.93.12.62.833.233.23.43.63.53.73.94.244.34.54.85.54.54.855.3655.35.55.86.566.46.677.81.3攻螺纹孔孔径与螺钉相配的螺纹攻丝孔孔径取决于外内螺纹结合比之大小.螺纹结合比()=(螺钉公称直径攻丝孔直径)(2X螺纹结合高度)X100(%)1.3.1米制细牙螺纹(单位mm)螺纹标志公称直径螺纹结合比()1009590858075706560Ml1.0000.780.
16、790.810.820.830.840.850.860.87Ml.11.1000.880.890.910.920.930.940.950.960.97M1.21.2000.980.991.011.021.031.041.051.061.07M1.41.4001.181.191.211.221.231.241.251.261.27M1.61.6001.381.391.411.421.431.441.451.461.47M1.81.8001.581.591.611.621.631.641.651.661.67M22.0001.731.741.761.771.781.801.811.821.84M2
17、.22.2001.931.941.961.971.982.002.012.022.04M2.52.5002.122.142.162.182.202.222.242.252.27M33.0002.622.642.662.682.702.722.742.752.77M3.53.5003.123.143.163.183.203.223.243.253.27M44.0003.463.493.513.543.573.593.623.653.68M4.54.5003.963.994.014.044.074.094.124.154.18M55.0004.464.494.514.544.574.594.624
18、.654.68M5.55.5004.964.995.015.045.075.095.125.155.18M66.0005.195.235.275.315.355.395.435.475.511.3.2米制粗牙螺纹（单位mm）螺纹标志公称直径10095908580757Ml1.0000.730.740.760.770.780.800MlJ1.1000.830.840.860.870.880.900M1.21.2000.930.940.960.970.981.001M1.41.4001.081.091.111.121.141.161ML61.6001.221.241.261.281.301.321
19、M1.81.8001.421.441.461.481.501.521M22.0001.571.591.611.631.651.681M2.22.2001.711.741.761.791.811.831M2.52.5002.012.042.062.092.112.132M3*0.53.0002.462.492.512.542.572.592M3.53.5002.852.882.922.952.983.013M4*0.74.0003.243.283.323.363.393.433M4.54.5003.693.733.773.813.853.893M5*0.85.0004.134.184.224.2
20、64.314.354M66.0004.924.975.035.085.135.1951.3.3英制细牙螺纹（单位mm）螺纹标志公称直径1009590858075706560No.0-80UNF1.5241.181.201.211.231.251.271.281.301.32No.1-72UNF1.8541.471.491.511.531.551.571.591.611.62No.2-64UNF2.1841.751.781.801.821.841.861.881.901.93No.3-56UNF2.5152.022.052.072.102.122.152.172.202.22No.4-48UNF
21、2.8452.272.302.332.362.392.422.442.472.50No.5-44UNF3.1752.552.582.612.642.682.712.742.772.80No.6-40UNF3.5052.822.852.892.922.962.993.023.063.09No.8-36UNF4.1663.403.443.483.523.553.593.633.673.71No.10-32UNF4.8263.974.014.054.104.144.184.224.274.31No.12-28UNF5.4864.504.554.604.654.704.754.804.854.901.
22、3.4英制粗牙螺纹（单位mm）螺纹标志公称直径1009590858075No.1-64UNC1.8541.421.451.471.491.511.53No.2-56UNC2.1841.691.721.741.771.791.82No.3-48UNC2.5151.941.972.002.032.062.09No.4-40UNC2.8452.162.192.232.262.302.33No.5-40UNC3.1752.492.522.562.592.632.66No.6-32UNC3.5052.652.692.732.772.822.86No.8-32UNC4.1663.313.353.393.4
23、43.483.52No.10-24UNC4.8263.683.743.793.853.913.97No.12-24UNC5.4864.344.404.454.514.574.631.3.5板材上孔与板边间距（对所有螺钉适用）板材上螺纹孔与板边间距如图要求bH2t（b为孔与板边的距离，t为板材厚度）1.4 配合尺寸同种规格的螺钉需与同种规格螺纹的螺母或与预攻同规格螺纹孔的钢板配合.如对M3的螺钉需与M3的螺母相配合，或者与在钢板上攻出M3的螺纹孔相配合.1.5 机械性能（包括材质与热处理）一般用CMl0.61.7Ml.10.61.7M1.20.61.7Ml.40.72M1.60.82.6M1.8
24、0.82.6M21.03M2.21.33.8M2.51.33.8M31.54.5M3.51.75M426M4.52.26.7M52.27.5M639Ml0.20.51.4Ml.l0.20.51.4M1.20.20.51.4M1.40.20.51.4M1.60.20.51.5M1.80.20.51.5M20.250.61.9M2.20.250.61.9M2,50.350.82.6M30.3513M3.50.3513M40.51.54.5M4.50.51.54.5M50.51.54.5M5.50.51.54.5M60.752.47.1注：对薄材，钢板厚度至少应大于23个螺距.1.7 特殊螺钉1.7
25、.1 自攻螺钉1.7.1.1 硬化层深度一般应进行表面硬化处理.表面渗碳或碳氮共渗层深度如下表（单位mm）：螺纹标志硬化层深度MinMax1-642-563-480.040.104-405-406-320.050.188-3210-2412-240.100.231.7.1.2硬度表面渗碳或碳氮共渗处理后硬度之一般要求:表面硬度不小于45HRC或450HV芯部硬度26-40HRC270-390HV1.7.1.3 尺寸自攻螺钉截面应为弧形三角形，如图（L为导引长度，a为收尾长度）.A-A（单位inch）螺纹标志CMaxMinMax00-900.04810.04610.04590-800.06130
26、.05930.05881-640.07450.07250.07102-560.08750.08400.08403-480.10100.09750.09704-400.11450.11150.10955-400.12750.12400.12256-320.14100.13600.13508-320.16700.16200.161010-240.19400.18900.185010-320.19300.18800.187012-240.22000.21500.2110.对螺纹长度大于l6inch,L应为23个螺距；对螺纹长度小于l6inch,L应为12个螺距.对螺纹收尾长度应小于1个螺距.1.7.
27、1.4 工作扭力对不同厚度钢板及预制孔，自攻螺钉之工作扭力如下表(单位lbf.inch)：螺纹标志钢板厚(inch)孔径(inch)攻牙扭力第一次拆卸扭力攻螺纹后安装扭力破坏扭力2-560.04690.07540.5-112670.06250.07640.5-1128100.09380.07950.5-11-211-143-480.06250.08761-23414750.09380.0897123515-160.12500.0907124615-184-400.03120.098612238110.06250.1029123415-180.09380.10211123422-275-400.
28、06250.11112234522-290.09380.11318344734-410.12500.11620456838-466-320.06250.12014344725-300.09380.12020356935-450.12500.12522466939-458-320.09380.147305-7I(M365-750.12500.150454711-1475-850.18750.1504581116-2075-9510-240.09380.172355814-1865-800.12500.1724558147880-900.18750.172559-1317-22100-11510-
29、320.09380.173359-1311-1480-950.12500.1775091312-161001200.18750.1777012-1619-2511514012-240.12500.1966597219-2495-1150.18750.199759-1321-26135-1550.25000.2038510-1421-26150-1701.7.1.5结合比()与预冲孔寸(单位inch)关系如表所示:结合比()100959085807570656055502-560.07440.07500.07560.07610.07670.07730.07790.07850.07900.0796
30、0.08023-480.08550.08610.08680.08750.08820.08880.08950.09020.09090.09160.09224-400.09580.09660.09740.09820.09900.09980.10060.10140.10230.10310.10395-400.10880.10960.11040.11120.11200.11280.11360.11440.11530.11610.11696-320.11770.11870.11970.12070.12180.12280.12380.12480.12580.12680.12788-320.14370.14
31、470.14570.14670.14780.14880.14980.15080.15180.15280.153810-240.16290.16430.16560.16700.16830.16970.17100.17240.17380.17510.176510-320.16970.17070.17170.17270.17380.17480.17580.17680.17780.17880.179812-240.18890.19030.19160.19300.19430.19570.19700.19840.19980.20110.2025对不同的金属材料应选用不同的旋合比，建议选用范围如下：粉末合金
32、或铸铁50-65%冷轧钢板65-70%铝材70-80%金属薄材80-95%171.6钢板孔径及抽牙高不同规格自攻螺钉所需钢板预制孔孔径及抽牙孔高寸如下（单位inch）：钢板厚度T0.020.030.040.060.09螺纹标志抽牙孔孔径D6-320.1180.1200.118-0.1210.1190.1220.1200.1230.122-0.1258-32O.144o.1460.1440.1470.145-0.1480.146-0.1490.147-0.15010-240.163-0.1650.163-0.1660.164-0.1670.165-0.1680.166-0.17010-320.1
33、70-0.1720.170-0.1730.171-0.1740.1720.1750.173-0.17612-240.189-0.1910.189-0.1920.190-0.1930.191-0.1940.192-0.196板厚T(inch)0.0240.0350.042-0.0480.0600.0900.1060.122孔径D(inch)HRHRHRHRHRHR0.081-0.1000.0400.0050.0400.0050.0400.0060.0430.0100.101-0.1300.0470.0050.0470.0050.0470.0060.0520.0100.0540.0100.1310
34、.1500.0530.0050.0530.0050.0530.0060.0600.0100.0630.0100.0720.0130.1510.1800.0600.0050.0600.0060.0700.0100.0750.0100.0870.0130.181-0.2200.0700.0050.0700.0060.0900.0100.0950.0100.1040.0130.2210.2600.0750.0060.1000.0100.1050.0100.1200.0130.261-0.3000.0830.0060.1160.0100.1250.0100.1400.0130.301-0.3400.1300.0100.1400.0100.1640.0130.341-0.3800.1400.0100.1550.0100.1700.0130.3810.4300.1500.0100.1700.0100.1840.0131.7.2 塑料螺钉1.7.2.1 螺纹形状1.7.2.2 硬度一般要求硬度范围在3339HRC310370HV（必要时可采用表面渗碳或碳氮共渗处理）1.7.2.3螺纹寸（单位mm）公称直径d螺纹小径dl螺距Pb(Max)公称直径d螺纹小径dl螺距Pb(Max)尺寸偏差尺寸偏差1.61.20/-0.250.80.2542.8
