螺纹攻丝前钻孔直径表
普通螺纹攻丝前底孔尺寸(in)
普通螺纹攻丝前底孔尺寸螺纹的直径和螺距钻孔直径车孔直径螺纹的直径和螺距钻孔直径车孔直径铸铁青铜钢黄铜直径公差铸铁青铜钢黄铜直径公差M4*0.7 M4*0.5 3.33.53.33.5M27**3M27*223.724.723.924.923.5 +0.3M5*0.8 M5*0.5 4.14.44.24.5M27*1.5M27*125.325.825.526M6*1M6*0.75 4.95.155.24.9-+0.3 M30*3.5M30*32626.726.226.926 +0.3M8*1.25 M8*1 6.66.96.776.6-+0.2 M30*2M30*1.527.728.327.928.5M10*1.5 M10*1.25 M10*1 8.48.68.98.58.798.3--+0.25 M33*3.5M33*3M33*22929.730.729.229.930.929 +0.3M12*1.75 M12*1.5 M12*1.25 M12*1 10.110.410.610.910.210.510.71110 +0.25 M33*1.5M36*4M36*3M36*1.531.331.532.734.331.531.732.934.5-31.432.534.3-+0.3+0.17+0.17M14*2 M14*1.5 M14*1 11.812.412.911.912.51311.7 +0.3 M39*4M39*3M39*1.534.635.737.334.835.937.534.435.537.3+0.3+0.17+0.17M16*2 M16*1.5 M16*1 13.814.414.913.914.51513.7 +0.3 M42*4.5M42*3M42*1.537.138.740.337.338.940.536.838.540.3+0.3+0.17+0.17M18*2.5 M18*2 M18*1.5 M18*1 15.315.816.416.915.415.916.51715.1 +0.3 M45*4.5M45*3M45*1.54041.843.340.24243.539.841.543.3+0.3+0.17+0.17M20*2.5 M20*2 M20*1.5 M20*1 17.217.718.318.817.417.918.51917.1 +0.3 M48*5M48*3M48*1.542.544.846.342.74546.542.244.546.3+0.3+0.17+0.17M22*2.5 M22*2 M22*1.5 M22*1 19.219.720.320.819.419.920.52119.1 +0.3 M52*5M52*3M52*1.546.448.850.346.64950.546.248.550.2+0.3+0.17+0.17M24*3 M24*2 M24*1 20.721.722.820.921.92320.5 +0.3 M56*5.5M56*4M56*2------49.751.453.7+0.3+0.2+0.2普通及英制螺纹底孔钻孔尺寸螺纹的直径和螺距车孔直径螺纹的直径和螺距说明车孔直径直径公差直径公差M60*5.5 M60*4 M60*2 53.755.457.7+0.3+0.2+0.2M105*4M105*2P—螺距d—螺纹公称直径d T—螺纹底孔直径P<1时d T=d-PP>1时d T=d-(1.04~1.08)P100.4102.7+0.23+0.23M64*6 M64*4 M64*2 57.159.461.7+0.3+0.2+0.2M110*4M110*2105.4107.7+0.23+0.23M68*6 M68*4 M68*2 61.163.465.7+0.3+0.2+0.2M115*4M115*2M160*3 *110.4112.7156.5+0.23+0.23+0.26M72*4 M72*2 67.469.7+0.2+0.2M120*4M120*2115.4117.7+0.23+0.23M76*4 M76*2 71.473.7+0.2+0.2M125*4M125*2120.4122.7+0.26+0.26M80*4 M80*2 75.477.7+0.2+0.2M130*4M130*2125.4127.7+0.26+0.26M85*4 M85*2 80.482.7+0.23+0.23M135*4M135*2130.4132.7+0.26+0.26M90*4 M90*2 85.487.7+0.23+0.23M140*4M140*2135.4137.7+0.26+0.26M95*4 M95*2 90.492.7+0.23+0.23M145*4M145*2140.4142.7+0.26+0.26M100*4 M100*2 95.497.7+0.23+0.23M150*4M150*2145.4147.7+0.26+0.26螺纹公称直径(in) 牙数/英寸螺纹底孔直径螺纹公称直径牙数/英寸螺纹底孔直径铸铁青铜钢黄铜铸铁青铜钢黄铜3/16 24 3.6 3.7 7/8 9 19.1 19.3 1/4 20 5.0 5.1 1 8 21.9 22.1 5/16 18 6.4 6.5 1⅛7 24.5 24.7 3/8 16 7.8 7.9 1+1/4 7 27.7 27.9 7/16 14 9.1 9.3 1+1/2 6 33.4 33.6 1/2 12 10.3 10.5 1+5/8 5 35.6 35.8 9/16 12 12 12.2 1+3/4 5 38.8 39 5/8 11 13.3 13.5 1+7/8 4+1/4 41.4 41.6 3/4 10 16.2 16.4 2 4+1/4 44.5 44.8王万桃2013-11-14。
攻螺纹前钻底孔直径及底径
以下是常用粗牙公制螺纹钻底孔尺寸对应表。
一般情况等于外径-螺距M1 ① 0.75M2 ① 1.6M3 ① 2.5M4 ① 3.3M5 ① 4.2M6①5M8 ① 6.75M10 ① 8.5M12 ① 10.25M14 ① 12M16 ① 14M18 ① 15.5M20 ① 17.5M22 ① 19.5M24 ① 21M27 ① 24M30 ① 26.5螺纹钻孔底径计算一般按下列公式:1.攻公制螺纹:螺距t<1毫米,dz=d-tt> 1 毫米,dz=d- (1.04 〜* 1.06)t式中t——螺距(毫米)dz ――攻丝前钻孔直径(毫米)d——螺纹公称直径(毫米)2.攻英制螺纹:螺纹公称直径铸铁与青铜钢与黄铜3/16"〜5/8" dz = 25 (d-1/n)dz = 25 (d-1/n)+0.13/4"〜11/2" dz = 25 (d-1/n)dz = 25 (d-1/n) +0.2式中dz——攻丝前钻孔直径(毫米)d——螺纹公称直径(英寸)n -----每英寸牙数首先,要知道螺纹的外径D,螺距T,螺纹底孔直径d=D-T。
攻螺纹前钻底孔直径和深度的确定以及孔口的倒角(1)底孔直径的确定丝锥在攻螺纹的过程中,切削刃主要是切削金属,但还有挤压金属的作用,因而造成金属凸起并向牙尖流动的现象,所以攻螺纹前,钻削的孔径(即底孔)应大于螺纹内径。
底孔的直径可查手册或按下面的经验公式计算:脆性材料(铸铁、青铜等):钻孔直径d0=d(螺纹外径)-1.1p (螺距)塑性材料(钢、紫铜等):钻孔直径d0=d(螺纹外径)-p (螺距)(2 )钻孔深度的确定攻盲孔(不通孔)的螺纹时,因丝锥不能攻到底,所以孔的深度要大于螺纹的长度,盲孔的深度可按下面的公式计算:孔的深度=所需螺纹的深度+0.7d普通螺纹底孔直径简单计算可按下式要攻丝的尺寸乘上0.85如:M3--2.4mmM4--3.1mmM5--4.2mM6--5.1mmM8--6.8mm公制粗牙環丝Metric coarse screw thread绵畦尺h Nominal 恬直悴Dr illldiameter呼世尺寸Nomirul站直帶DfilldiametAfJI惟尺廿Ncmiriail帖直汙Dnlldiame-lef n建尺寸Nomiinal粘直猗Drill diameterMl X{J,25 0 7& M?t&x045 2.10 M9 7 00 M27X3 "(J M' .l xO.250 86M2 6x0 4b 2.20MWX1.5 6 5C M3DK^26 5 M-.2x0.25 0.96M2 2.S0MUX 15 .)h(:29.5 M- .4x0.3 1.10M3.5x0.5 2.90M^x17510.3M36X432.0 Mk6x0.36 1.2S M4 x0 7 3.30 MUx2 12.0 35 0 M*.7x0.35 1.35W4,5J<D 75 3.80 MlGx2 14.0M42X4.537.5 M J .8x0.35 V4S MS xD.S 4.20 M16xZ,515.6M45X4.5 40.5 M2 X0.41,60M6 x 1.95,00M 20x2,517,5LU护543.0 M2.£XO.45 \75 M7 xl.O 6.00 M22M2.5 15.5M2.3XQ.4 1 90MB xi 25 6.80 ?1 Q聲雀尺寸NomimaJ 钛直径Drilldiameteru毎尺寸Ncmirtal钻直径Drilldiameter煤蛙尺寸Nominal鮎直径DNIIdiame-:ef每蛙尺寸Nominal站直径OriUdiamettrMH XO.Z oao Ml 1x0.75 10 3M25X1 5?3 5 M39X1.5 37.5 Ml .1X0,20.30Mljx I $10.5M 鬲、1.3M4QX3.037.D M\2XO.? ).00 1W1 t L2510.H Kin 1.5M40X2.O 38.0 Mil.4X0.2 1.2G M12M 1.0 1.0M27x? 0M4QX1M- .GxO.2 .40Lil < 1.!12.6 M27K1.J 25.S M42X4.0 33.D M\0XO.2 1.60M14X Lt 3.0M27x1 : 2B.C M42K J39.D M2 X0.25 V7S M15X1.5 13,5 >J28x2,0 26.0 M42X2.0 40.0 M2.2x0,2b 1.95M1&XL0■::I M28x1.& 263M42X1&•— !;Ml2.5x0.35 2.20 M16K 1.514.5 M28X1.0 i?.o MME kg 410M3 XO35 2.70M16X1.0 15-0M3OX3.D27.0M45X3.042 0 M3…5X0.35 3 20 M17XK515.5M3Ox2s0 23.0M45^2.0 43.0 M4 XCJ.& 3 50Ml Tx | L Q 5.Q M3OX1 .h XP. t M4&X 1.543.5M4.5x0.^ d 00 MlBx?Q 16-0 M3QX1 0?9 0 M4^X4.Q 44.0 MS >0.5.50MlRx I/ 5.5U32x2.0 30.C M佃2045.0 M 5.5X0.5 5.00 Miaxi.i 7.0 ■ ■30.5 M4ax2.0 46.0 M6 X0.7S 5.30M20X2.018.0M33x3.030.0M+8X 1.546.5 M? X0J5 6.30 M?DX15 13.5 ^33x2,0 31.0 M50X3 0 47.0 x LO7.00M20x 1.019.0M33x1.b 31.5MbOxS.O4B0 MH XO 75 7.30 M22x2.U 200 M 25x1.5 i3.5M50 x 1.5 5M9 X1.0 8.00M22X1.S 20.5M36X3.D33.0M9 XO75 8.30 L1?£xl .021.Q M36X.2.0 340MIO Ki.25 8 00 M?4x2.Q 22.0 M36xl 5 345M'O X1.0 9 00 M24X1 322.5 MHflxl .5斑藪同中」町刚人」M O >0.759 30MZ4x 1.23.0M39X3.0 woMl 1 Xl.D )0.Q M25>c2.O 23.0 M39x2 Q 37.0公制细牙饋銓Metric fine screw thread对六角孔總孔•螺栓孔的尺寸表,D,MEN5,0NS 0FC0UNTERB0R,NG叩HEXAG0N SOCKET HEAD CAP SCREW AND B0LT H0L£SHCWA TOOL CO Bi LTD.ts世尺寸fd)ds dr L>.k H p Hr dzMonwui dmnaBcflnadh/3 34 5.5 氐 2.7 3.3 2.6臥丄 4 4.57e426 4.J 3.45 5.5 05 9.5 5 46 5.4 4 3W6 6.^ 1011&汕MB8 9 1314B7.4 H.e 65M10 111617.5109.210.B a.eM12 12 li IB 20 12 11 1310.4M U 1416212314 12.fi IS 21?.2MIS16 18 24?6 16 U.S17 5 14-2M13 ie2C2?2<51816-5 19 515 JM L2O2Q 22 30 32 20 16 521 5 17.7M>22 223433 35 £220.5 23.519 7M2424 ?G 36 392422.5 25 5 2L2273040 4327ZS2924. ZM30 503345 4830茁32 26.7。
螺纹加工底孔直径对照表
螺纹加工底孔直径对照表
G 英制圆柱管螺纹〔55°〕加工一览表
ZG英制锥管螺纹〔55°〕加工一览表
注意:底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
〔规定为15倍螺距〕Z圆锥管螺纹〔布锥管螺纹〕〔60°〕
美制螺纹〔UNC、UNF〕参数表〔60°〕
注意:in为英寸符号,一英寸等于25.4毫米。
底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
〔规定为15倍螺距〕惠氏螺纹〔BSW、BSF〕参数表〔55°〕
注意:in为英寸符号,一英寸等于25.4毫米。
底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时光孔深度尺寸。
〔规定为15倍螺距〕
惠氏螺纹为紧固件螺纹。
公称直径为螺纹大径。
普通螺纹攻螺纹前底孔的钻头直径
非密封管螺纹攻螺纹前钻底孔的钻头直径
螺纹公称直径〔"〕1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 3/8 1 1/2 每25.4mm内牙数28 19 19 14 14 11 11 11 11 钻头直径〔mm〕8.8 11.7 15.2 18.9 24.4 30.6 39.2 41.3 45.1
英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径
英制锥管螺纹英制锥螺纹
公称直径每25.4mm 钻头直径公称直径每25.4mm 钻头直径
〔"〕内牙数〔mm〕〔"〕内牙数〔mm〕
1/8 28 8.4 1/8 27 8.6
螺纹底孔明细
英制平行管用螺纹〔G、PF〕。
普通螺纹攻丝前底孔尺寸(in)
普通螺纹攻丝前底孔尺寸螺纹的直径和螺距钻孔直径车孔直径螺纹的直径和螺距钻孔直径车孔直径铸铁青铜钢黄铜直径公差铸铁青铜钢黄铜直径公差M4*0.7 M4*0.5 3.33.53.33.5M27**3M27*223.724.723.924.923.5 +0.3M5*0.8 M5*0.5 4.14.44.24.5M27*1.5M27*125.325.825.526M6*1M6*0.75 4.95.155.24.9-+0.3 M30*3.5M30*32626.726.226.926 +0.3M8*1.25 M8*1 6.66.96.776.6-+0.2 M30*2M30*1.527.728.327.928.5M10*1.5 M10*1.25 M10*1 8.48.68.98.58.798.3--+0.25 M33*3.5M33*3M33*22929.730.729.229.930.929 +0.3M12*1.75 M12*1.5 M12*1.25 M12*1 10.110.410.610.910.210.510.71110 +0.25 M33*1.5M36*4M36*3M36*1.531.331.532.734.331.531.732.934.5-31.432.534.3-+0.3+0.17+0.17M14*2 M14*1.5 M14*1 11.812.412.911.912.51311.7 +0.3 M39*4M39*3M39*1.534.635.737.334.835.937.534.435.537.3+0.3+0.17+0.17M16*2 M16*1.5 M16*1 13.814.414.913.914.51513.7 +0.3 M42*4.5M42*3M42*1.537.138.740.337.338.940.536.838.540.3+0.3+0.17+0.17M18*2.5 M18*2 M18*1.5 M18*1 15.315.816.416.915.415.916.51715.1 +0.3 M45*4.5M45*3M45*1.54041.843.340.24243.539.841.543.3+0.3+0.17+0.17M20*2.5 M20*2 M20*1.5 M20*1 17.217.718.318.817.417.918.51917.1 +0.3 M48*5M48*3M48*1.542.544.846.342.74546.542.244.546.3+0.3+0.17+0.17M22*2.5 M22*2 M22*1.5 M22*1 19.219.720.320.819.419.920.52119.1 +0.3 M52*5M52*3M52*1.546.448.850.346.64950.546.248.550.2+0.3+0.17+0.17M24*3 M24*2 M24*1 20.721.722.820.921.92320.5 +0.3 M56*5.5M56*4M56*2------49.751.453.7+0.3+0.2+0.2普通及英制螺纹底孔钻孔尺寸螺纹的直径和螺距车孔直径螺纹的直径和螺距说明车孔直径直径公差直径公差M60*5.5 M60*4 M60*2 53.755.457.7+0.3+0.2+0.2M105*4M105*2P—螺距d—螺纹公称直径d T—螺纹底孔直径P<1时d T=d-PP>1时d T=d-(1.04~1.08)P100.4102.7+0.23+0.23M64*6 M64*4 M64*2 57.159.461.7+0.3+0.2+0.2M110*4M110*2105.4107.7+0.23+0.23M68*6 M68*4 M68*2 61.163.465.7+0.3+0.2+0.2M115*4M115*2M160*3 *110.4112.7156.5+0.23+0.23+0.26M72*4 M72*2 67.469.7+0.2+0.2M120*4M120*2115.4117.7+0.23+0.23M76*4 M76*2 71.473.7+0.2+0.2M125*4M125*2120.4122.7+0.26+0.26M80*4 M80*2 75.477.7+0.2+0.2M130*4M130*2125.4127.7+0.26+0.26M85*4 M85*2 80.482.7+0.23+0.23M135*4M135*2130.4132.7+0.26+0.26M90*4 M90*2 85.487.7+0.23+0.23M140*4M140*2135.4137.7+0.26+0.26M95*4 M95*2 90.492.7+0.23+0.23M145*4M145*2140.4142.7+0.26+0.26M100*4 M100*2 95.497.7+0.23+0.23M150*4M150*2145.4147.7+0.26+0.26螺纹公称直径(in) 牙数/英寸螺纹底孔直径螺纹公称直径牙数/英寸螺纹底孔直径铸铁青铜钢黄铜铸铁青铜钢黄铜3/16 24 3.6 3.7 7/8 9 19.1 19.3 1/4 20 5.0 5.1 1 8 21.9 22.1 5/16 18 6.4 6.5 1⅛7 24.5 24.7 3/8 16 7.8 7.9 1+1/4 7 27.7 27.9 7/16 14 9.1 9.3 1+1/2 6 33.4 33.6 1/2 12 10.3 10.5 1+5/8 5 35.6 35.8 9/16 12 12 12.2 1+3/4 5 38.8 39 5/8 11 13.3 13.5 1+7/8 4+1/4 41.4 41.6 3/4 10 16.2 16.4 2 4+1/4 44.5 44.8王万桃2013-11-14。
螺纹底径表
螺纹底孔直径一、螺纹底孔直径计算式螺纹底孔直径可参照表1、表2的公式计算,也可查表3至表11。
表1 加工米制普通螺纹底孔钻头直径D的计算公式适用范围1D = d – t式中 d:螺纹的公称直径t:螺距(1)螺距t<1;(2)工件材料塑性较大;(3)孔扩张量适中。
2 D = d – (1.04~1.08)t (1)螺距t<1;(2)工件材料塑性较小;(3)孔扩张量较小。
表2 加工英制螺纹底孔钻头直径的计算公式(mm)螺纹公称直径(英寸)铸铁与青铜 钢与黄铜3/16"~5/8" D = 25.4·(d - 1/n) D = 25.4·(d - 1/n) + 0.1 3/4"~1 1/2" D = 25.4·(d - 1/n) D = 25.4·(d - 1/n) + 0.2注:n—每英寸牙数·2·二、螺纹底孔直径表表3 米制粗牙螺纹攻丝前用的钻头直径(mm)螺 纹小 直 径 级 别公称直径 螺距5Hmax 6Hmax7Hmax5H、6H、7Hmin钻头直径1 1.2 1.6 2 2.5 34568 10 12 14 16 18 20 22 24 0.250.250.350.40.450.50.70.811.251.51.75222.52.52.530.7850.9851.3011.6572.1122.5713.3824.2945.0076.8598.61210.37112.13514.13515.64917.64919.64921.1521.3211.6792.1382.5993.4224.3345.1536.9128.67610.44112.21014.21015.74417.74419.74421.2522.6393.4664.3845.2176.9828.75110.53112.31014.31015.85417.85419.85421.3820.7290.9291.2211.5612.0132.4593.2424.1344.9176.6478.37610.10611.83513.83515.29417.29419.29420.7540.750.951.251.602.052.503.304.205.006.808.5010.212.014.015.517.519.521.0·3·表4 米制细牙螺纹攻丝前用的钻头直径(mm)螺 纹小 直 径 级 别公称直径 螺距 5Hmax 6Hmax7Hmax5H、6H、7Hmin钻头直径2.5 3 0.352.2012.7012.2212.7212.1212.6212.152.654 5 0.53.5714.5713.5994.5993.6394.6393.4594.4593.504.5068 10 0.755.3387.3389.3385.3787.3789.3785.4247.4249.4245.1887.1889.1885.707.209.208 10 12 1416 18 20 22 24 17.1079.10711.10713.10715.10717.10719.10721.10723.1077.2179.21711.21713.21715.21717.21719.21721.21723.2177.2179.21711.21713.21715.21717.21719.21721.21723.2176.9178.91710.91712.91714.91716.91718.91720.91722.9177.009.0011.013.015.017.019.021.023.01012 14 1.258.85910.85912.8598.91210.91212.9128.98210.98212.9828.64710.64712.6478.8010.812.812141516 18 20 22 1.510.61212.61213.61214.61216.61218.61220.61210.67612.67613.67614.67616.67618.67620.67610.75112.75113.75114.75116.75118.75120.75110.37612.37613.37614.37616.37618.37620.37610.512.513.514.516.518.520.5·4·螺 纹小 直 径 级 别公称直径 螺距 5Hmax 6Hmax7Hmax5H、6H、7Hmin钻头直径2425 1.522.61223.61222.67623.67622.75123.75122.37623.37622.523.518 20222425 216.13518.13520.13522.13523.13516.21018.21020.21022.21023.21016.31018.31020.31022.31023.31015.83517.83519.83521.83522.83516.018.020.022.023.0表5 英国标准粗牙惠氏螺纹B、S、W攻丝前用的钻头直径(mm)钻 头 直 径公称直径 (英寸) 每英寸牙数铸铁、青铜、黄铜钢、可锻铸铁3/16 1/45/16 3/81/25/83/47/811 1/8 1 1/4 1 1/2 1 3/4 2 242018161211109877654 1/23.85.16.68.010.613.616.619.622.325.028.234.039.545.33.95.26.78.110.713.816.819.722.525.228.434.239.745.6·5·表6 英寸制统一粗牙螺纹UNC 攻丝前用的钻头直径(mm)螺 纹小 直 径 级 别公称直径 (英寸) 每英寸牙 数螺 距2B max 3B max 2B、3B min 钻头 直径 No.1 No.2 No.3 No.4 No.5 64 56 48 40 40 0.397 0.454 0.529 0.635 0.635 1.5821.8722.1462.3852.697 1.5821.8722.1462.3852.697 1.4251.6941.9412.1562.487 1.55 1.85 2.10 2.35 2.65 No.6 No.8 No.10 No.12 1/4 32 32 24 24 20 0.794 0.794 1.058 1.058 1.270 2.8963.5313.9624.5975.268 2.8963.5283.9504.5905.250 2.6423.3023.6834.3434.976 2.85 3.50 3.90 4.60 5.10 5/16 3/8 7/16 1/2 9/16 18 16 14 13 12 1.411 1.588 1.814 1.954 2.117 6.7848.1649.55011.01312.456 6.6808.0829.44110.88112.301 6.4117.8059.14910.58411.996 6.60 8.00 9.40 10.80 12.20 5/8 3/4 7/8 1 1 1/8 11 10 9 8 7 2.309 2.540 2.822 3.175 3.629 13.86816.83319.74822.59825.34913.69316.62419.52022.34425.08213.37616.29919.16921.96324.64813.50 16.50 19.50 22.25 25.00 1 1/4 1 3/8 1 1/2 1 3/4 2 7 6 6 5 4 1/23.6294.233 4.2335.080 5.64428.52431.12034.29539.81445.59828.25830.85134.02639.56045.36727.82330.34333.51938.95144.68928.00 30.75 34.00 39.50 45.00·6· 表7 英寸制统一细牙螺纹UNF 攻丝前用的钻头直径(mm)螺 纹小 直 径 级 别公称直径 (英寸) 每英寸牙 数螺 距2B max 3B max 2B、3B min 钻头 直径 No.0 No.1 No.2 No.3 No.4 80 72 64 56 48 0.318 0.353 0.397 0.454 0.529 1.3061.6131.9132.1972.459 1.3061.6131.9132.1972.459 1.1811.4731.7552.0242.271 1.25 1.55 1.90 2.15 2.40 No.5 No.6 No.8 No.10 No.12 44 40 36 32 28 0.577 0.635 0.706 0.794 0.907 2.7413.0233.6074.1664.724 2.7413.0123.5974.1684.717 2.5502.8193.4043.9624.496 2.70 2.95 3.50 4.10 4.70 1/4 5/16 3/8 7/16 1/2 28 24 24 20 20 0.907 1.058 1.058 1.270 1.270 5.5807.0388.62610.03011.618 5.5636.9958.5659.94711.524 5.3676.7928.3799.73811.326 5.50 6.90 8.50 9.90 11.50 9/16 5/8 3/4 7/8 1 18 18 16 14 12 1.411 1.411 1.588 1.814 2.117 13.08414.67117.68920.66323.56912.96914.55417.54620.49323.36312.76114.34817.33020.26223.10912.90 14.50 17.50 20.40 23.25 1 1/8 1 1/4 1 3/8 1 1/2 12 12 12 122.117 2.117 2.117 2.11726.74429.91933.09436.26926.53829.71332.88836.06326.28429.45932.63435.80926.50 29.50 32.75 36.00·7·表8 GB7307-87、ISO228/1-1982非螺纹密封的管螺纹攻丝前用的钻头直径(mm)螺 纹小 直 径 公称直径 (英寸) 每英寸 牙 数 螺 距 max min 钻头 直径 1/8 1/4 3/8 1/2 5/8 3/4 7/8 1 1 1/4 1 1/2 1 3/4 2 28 19 19 14 14 14 14 11 11 11 11 110.907 1.337 1.337 1.814 1.814 1.814 1.814 2.309 2.309 2.309 2.309 2.3098.848 11.890 16.395 19.172 21.128 24.658 28.418 30.931 39.592 45.485 51.428 75.2968.566 11.445 14.950 18.631 20.587 24.117 27.877 30.291 38.952 44.845 50.788 56.5568.80 11.80 15.25 19.00 21.00 24.50 28.25 30.75 39.50 45.00 51.00 57.00·8· 表9 GB7306-87、ISO7/1-1982用螺纹密封的管螺纹攻丝前用的钻头直径(mm)螺 纹小 直 径 公称直径 (英寸) 每英寸 牙 数 螺 距 max min 钻头 直径 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 28 19 19 14 14 11 11 11 110.907 1.337 1.337 1.814 1.814 2.309 2.309 2.309 2.3098.637 11.549 15.054 18.773 24.259 30.471 39.132 45.025 56.8368.495 11.341 14.846 18.489 23.975 30.111 38.772 44.665 56.4768.60 11.50 15.00 18.50 24.00 30.25 39.00 45.00 56.50·9·表10 美标(NPT、NPSC)管螺纹底孔推荐的麻花钻直径(英寸)锥 螺 纹公称直径使用铰刀 不用铰刀直管螺纹1 2 3 41/161/81/43/81/23/411 1/4 1 1/2 22 1/2 21/6427/649/1611/1657/641 1/21 15/321 23/322 3/162 19/32*0.240*0.328*0.422*0.562*0.688*0.891*1.1251.4691.7192.1882.5947/169/1645/6429/321 9/641 31/641 47/642 13/642 5/8*0.246*0.332*0.438*0.562*0.703*0.906*1.1411.4841.7342.2032.6251/411/327/1637/6423/3259/641 5/321 1/21 3/42 7/322 21/32*0.250*0.344*0.438*0.578*0.719*0.922*1.1561.5001.7502.2192.656注:*为美国标准麻花钻尺寸·10·表11 美标(NPTF、NPSI)干密封管螺纹底孔推荐的麻花钻直径(英寸)锥 螺 纹公称直径使用铰刀 不用铰刀直管螺纹1 2 3 41/161/81/43/81/23/411 1/4 1 1/2 22 1/23 21/6427/649/1611/1657/641 1/81 15/321 45/642 3/162 19/323 7/32*0.234*0.328*0.422*0.562*0.688*0.891*1.1251.4691.7032.1882.5943.2197/1627/6445/6459/641 5/321 1/21 47/642 7/322 41/643 17/64*0.246*0.339*0.436*0.578*0.703*0.922*1.1561.5001.7342.2192.6413.2661/4*11/3227/6423/32*59/641 5/32*0.250*0.344*0.444*0.578*0.719*0.922*1.156注:*为美国标准麻花钻尺寸。
螺纹孔底孔尺寸表
简介:若底孔直径与内螺纹直径一致材料扩张时就会卡住丝锥,这时丝锥容易折断;若过大,就会使攻出的螺纹牙型高度不够而形成废品。
底孔直径:丝锥在攻螺纹的过程中,切削刃主要是切削金属,但还有挤压金属的作用,因而造成金属凸起并向牙尖流动的现象,所以攻螺纹前,钻削的孔径应大于螺纹内径。
底孔的直径可查手册或按下面的经验公式计算:脆性材料:钻孔直径d0=d(螺纹外径)-1.1p(螺距)塑性材料(钢、紫铜等):钻孔直径d0=d(螺纹外径)-p(螺距)钻孔深度:攻盲孔的螺纹时,因丝锥不能攻到底,所以孔的深度要大于螺纹的长度,盲孔的深度可按下面的公式计算:孔的深度=所需螺纹的深度+0.7d公制螺纹的计算方法:底径=大径-1.0825*螺距英制螺纹的计算方法:底径=大径-1.28*螺距攻螺纹:攻螺纹是钳工金属切削中的重要内容之一,包括划线、钻孔、攻螺纹等环节。
攻螺纹只能加工三角形螺纹,属连接螺纹,用于两件或多件结构件的连接。
螺纹的加工质量直接影响到构建的装配质量效果,所以实习教学非常重视攻螺纹各环节的教学。
简介:工作部分是一段开槽的外螺纹。
丝锥的工作部分包括切削部分和校准部分。
手用丝锥一般由两支组成一套,分为头锥和二锥。
两支丝锥的外径、中径和内径均相等,只是切削部分的长短和锥角不同。
头锥较长,锥角较小,约有6个不完整的齿,以便切入。
二锥短些,锥角大些,不完整的齿约为2个。
铰杠是扳转丝锥的工具。
常用的是可调节式,以便夹持各种不同尺寸的丝锥。
划孔位线:划线时,钻孔是攻螺纹的基础。
划线准确,孔位尺寸就能得到保证。
划线前,首先要看懂图样和工艺要求,明确工作任务。
然后,清理划线表面,涂上酒精溶液,选择好划线基准。
选择划线基准时,尽可能使划线基准和设计基准重合,采用划线盘对毛坯进行划线,已加工好的表面则采用高度游标尺进行划线。
划圆线时,先划出十字中心线再划圆线,大直径的园可划多个圆线,用以钻孔时作参考线。
线条要求清晰均匀,划完线后要仔细检查划线的准确性及是否有漏划线条,确认无误后再打上样冲。
螺纹底孔直径对照表
钻头直 径 (mm) 8.6 11.1 14.5 17.9 23.2 29.2 37.9 43.9 56
1/2
3/4
1/2
3/4
1 1 1/4 1 1/2 2
1 1 1/4 1 1/2 2
公制细牙螺纹
螺纹代号 M2× 0.25 M3× 0.35 M4× 0.5 M5× 0.5 M6× 0.75 M8× 1.0 M8× 0.75 M10× 1.0 M10× 1.25 M10× 0.75 M12× 1.5 M12× 1.25 M12× 1.0 M14× 1.5 M14× 1.0 M16× 1.5 M16× 1.0 M18× 1.5 M18× 1.0 M20× 2.0 M20× 1.5 M20× 1.0 M24× 2.0 M24× 1.5 M24× 1.0 M30× 3 钻头直径 HSS 1.75 2.7 3.5 4.5 6.3 7 7.3 9 8.8 9.3 10.5 10.8 11 12.5 13.0 14.5 15.0 16.5 17 18 18.5 19 22.0 22.5 23.0 27 硬质合金 1.75 2.7 3.55 4.55 6.35 7.1 7.35 9.1 8.9 9.35 10.7 10.9 11.1 12.7 13.1 14.7 15.1 16.7 17.1 18.3 18.7 19.1 …… …… …… ……
螺纹代号m202m303m40m50m607m81m807m101m101m100m121m121m121m141m141m161m161m181m181m202m201m201m242m241m241m30m30m301m301m363m36m361m42m42m42m421m45m45m45m451m48m48m48m481攻螺纹前底孔直径的确定1普通螺纹攻螺纹前底孔的钻头直2非螺纹密封的管螺纹攻螺纹前钻底孔的螺纹公称直径每254mm内牙数钻头直径mm18288814191173812141893419152142443英制锥管螺纹和英制锥螺纹攻丝前钻底孔英制锥管螺纹英制锥螺纹公称直径181438每254mm内牙数281919141411111111钻头直径mm84112147183236297383441558公称直径181438每254mm内牙数27181814141112111211121112钻头直径mm8611114517923229237943956123412341114112211141122公制细牙螺纹纹代号2025303540550560758108075101001250075121521251210141514101615161018151810202020152010242024152410m303钻头直径hss17527354563773988931051081112513014515016517181851922022523027硬质合金17527355455635717359189935107109111127131147151167171183187191
螺纹底径表
31.120
34.295
39.814
45.598
28.258
30.851
34.026
39.560
45.367
27.823
30.343
33.519
38.951
44.689
28.00
30.75
34.00
39.50
45.00
4.571
3.599
4.599
3.639
4.639
3.459
4.459
3.50
4.50
6 5.338 5.378 5.424 5.188 5.70
8 0.75 7.338 7.378 7.424 7.188 7.20
10 9.338 9.378 9.424 9.188 9.20
12 1.25 10.859 10.912 10.982 10.647 10.8
14 12.859 12.912 12.982 12.647 12.8
12 10.612 10.676 10.751 10.376 10.5
14 12.612 12.676 12.751 12.376 12.5
No.8
No.10
No.12
1/4
32
32
24
24
20
0.794
0.794
1.058
1.058
1.270
2.896
3.531
3.962
4.597
5.268
2.896
3.528
3.950
4.590
公制螺纹钻底孔用钻头直径尺寸表
公制螺纹钻底孔用钻头直径尺寸表【2 】M1:粗扣螺距0.25=Φ0.75 细扣螺距0.2=Φ0.8M2:粗扣螺距0.4=Φ1.6 细扣螺距0.25=Φ1.8M3:粗扣螺距0.5=Φ2.5 细扣螺距0.35=Φ2.7M4:粗扣螺距0.7=Φ3.3 细扣螺距0.5=Φ3.5M5:粗扣螺距0.8=Φ4.2 细扣螺距0.5=Φ4.5M6:粗扣螺距1.0=Φ5.0 细扣螺距0.75=Φ5.2M8:粗扣螺距1.25=Φ6.7 细扣螺距1.0 ,0.75=Φ7,Φ7.2M10:粗扣螺距1.5=Φ8.5 细扣螺距1.25,1.0 ,0.75=Φ8.7,Φ9,Φ9.2M12:粗扣螺距1.75=Φ10.2 细扣螺距1.5,1.25,1.0=Φ10.5,Φ10.7,Φ11M14:粗扣螺距2.0=Φ11.9 细扣螺距1.5,1.25,1.0=Φ12.5,Φ12.7,Φ13M16:粗扣螺距2.0=Φ14 细扣螺距1.5,1.0=Φ14.5,Φ15M18:粗扣螺距2.5=Φ15.4 细扣螺距2.0 ,1.5,1.0=Φ15.9,Φ16.5,Φ17M20:粗扣螺距2.5=Φ17.4 细扣螺距2.0 ,1.5,1.0=Φ17.9,Φ18.5,Φ19M22:粗扣螺距2.5=Φ19.5 细扣螺距2.0 ,1.5,1.0=Φ19.9,Φ20.5,Φ21M24:粗扣螺距3.0=Φ20.9 细扣螺距2.0 ,1.5,1.0=Φ21.9,Φ22.5,Φ23 临盆中钻螺纹底孔公式:t<1mm: Dz=d-tt>1mm: Dz=d-(1.04~1.06)t式中 t 螺距(毫米)Dz 攻丝前钻头直径(毫米)d 螺纹公称直径(毫米)公制螺纹钻底孔用钻头直径尺寸表公称直径d 螺距t 钻头直径公称直径d 螺距t 公称直径dM1 粗 0.25 =0.75 M2 粗 0.4 =1.6细 0.2 =0.8 细 0.25 =1.75M3 粗 0.5 =2.5 M4 粗 0.7= 3.3细 0.35 =2.65 细 0.5 =3.5M5 粗 0.8 =4.2 M6 粗 1.0 =5.0细 0.5 =4.5 细 0.75 =5.2M8 粗 1.25 =6.7 M10 粗 1.5 =8.5 细 1.0=7.0 细 1.25 =8.7细 0.75 =7.2 细 1.0=9.0细 0.75 =9.2M12 粗 1.75 =10.2 M14 粗 2.0=11.9细 1.5 =10.5 细 1.5 =12.5细 1.25 =10.7 细 1.25 =12.7细 1.0=11.0 细 1.0=13.0M16 粗 2.0=13.9 M18 粗 2.5 =15.4细 1.5 =14.5 细 2.0=15.9细 1.0=15.0细 1.5 =16.5细 1.0=17.0M20 粗 2.5 =17.4 M22 粗 2.5 =19.4 细 2.0=17.9 细 2.0=19.9 细 1.5 =18.5 细 1.5 =20.5 细 1.0=19.0 细 1.0=21.0M24 粗 3.0=20.9 M27 粗 3.0=23.9 细 2.0=21.9 细 2.0=24.9细 1.5 =22.5 细 1.5 =25.5细 1.0=23.0 细 1.0=26.0M30 粗 3.5 =26.3 M33 粗 3.5 =29.3 细 3.0=26.9 细 3.0 =29.9细 2.0=27.9 细 2.0=30.9细 1.5 =28.5 细 1.5 =31.5细 1.0=29.0M36 粗 4.0=31.8 M39 粗 4.0=34.8 细 3.0=32.9 细 3.0=35.9细 2.0=33.9 细 2.0 =36.9细 1.5 =34.5 细 1.5 =37.5M42 粗 4.5 =37.3 M45 粗 4.5 =40.3 细 4.0=37.8 细 4.0=40.8细 3.0=38.9 细 3.0=41.9细 2.0=39.9 细 2.0=42.9细 1.5 =40.5 细 1.5 =43.5M48 粗 5.0=42.7 M52 粗 5.0=46.7细 4.0=43.8 细 4.0=47.8细 3.0=44.9 细 3.0=48.9细 2.0=45.9 细 2.0=49.9细 1.5 =46.5 细 1.5 =50.5。
攻螺纹前钻底孔直径及底径1
以下是常用粗牙公制螺纹钻底孔尺寸对应表。
一般情况等于外径-螺距M1 Φ0.75M2 Φ1.6M3 Φ2.5M4 Φ3.3M5 Φ4.2M6 Φ5M8 Φ6.75M10 Φ8.5M12 Φ10.25M14 Φ12M16 Φ14M18 Φ15.5M20 Φ17.5M22 Φ19.5M24 Φ21M27 Φ24M30 Φ26.5螺纹钻孔底径计算一般按下列公式:1.攻公制螺纹:螺距t<1毫米,dz=d-tt>1毫米,dz=d-(1.04~1.06)t式中t——螺距(毫米)dz——攻丝前钻孔直径(毫米)d——螺纹公称直径(毫米)2.攻英制螺纹:螺纹公称直径铸铁与青铜钢与黄铜3/16"~5/8" dz=25(d-1/n) dz=25(d-1/n)+0.13/4"~11/2" dz=25(d-1/n) dz=25(d-1/n) +0.2式中dz——攻丝前钻孔直径(毫米)d——螺纹公称直径(英寸)n——每英寸牙数首先,要知道螺纹的外径D,螺距T,螺纹底孔直径d=D-T。
攻螺纹前钻底孔直径和深度的确定以及孔口的倒角(1)底孔直径的确定丝锥在攻螺纹的过程中,切削刃主要是切削金属,但还有挤压金属的作用,因而造成金属凸起并向牙尖流动的现象,所以攻螺纹前,钻削的孔径(即底孔)应大于螺纹内径。
底孔的直径可查手册或按下面的经验公式计算:脆性材料(铸铁、青铜等):钻孔直径d0=d(螺纹外径)-1.1p(螺距)塑性材料(钢、紫铜等):钻孔直径d0=d(螺纹外径)-p(螺距)(2)钻孔深度的确定攻盲孔(不通孔)的螺纹时,因丝锥不能攻到底,所以孔的深度要大于螺纹的长度,盲孔的深度可按下面的公式计算:孔的深度=所需螺纹的深度+0.7d普通螺纹底孔直径简单计算可按下式要攻丝的尺寸乘上0.85如:M3--2.4mmM4--3.1mmM5--4.2mM6--5.1mmM8--6.8mm公制螺纹的计算方法:底径=大径-1.0825*螺距英制螺纹的计算方法:底径=大径-1.28*螺距脆性材料钻孔直径D=d(螺纹外径)-1.1p(螺距)塑性材料钻孔直径D=d(螺纹外径)-p(螺距)除了以上的经验公司外,还要考虑螺纹的公差等级. 普通公制螺纹用外径-螺距。
公制螺纹钻底孔用钻头直径尺寸表
公制螺纹钻底孔用钻头直径尺寸表M1:粗扣螺距0.25=Φ0.75 细扣螺距0.2=Φ0.8M2:粗扣螺距0.4=Φ1.6 细扣螺距0.25=Φ1.8M3:粗扣螺距0.5=Φ2.5 细扣螺距0.35=Φ2.7M4:粗扣螺距0.7=Φ3.3 细扣螺距0.5=Φ3.5M5:粗扣螺距0.8=Φ4.2 细扣螺距0.5=Φ4.5M6:粗扣螺距1.0=Φ5.0 细扣螺距0.75=Φ5.2M8:粗扣螺距1.25=Φ6.7 细扣螺距1.0 , 0.75=Φ7,Φ7.2M10:粗扣螺距1.5=Φ8.5 细扣螺距1.25 , 1.0 , 0.75=Φ8.7,Φ9,Φ9.2M12:粗扣螺距1.75=Φ10.2 细扣螺距1.5 , 1.25 , 1.0=Φ10.5,Φ10.7,Φ11 M14:粗扣螺距2.0=Φ11.9 细扣螺距1.5 , 1.25 , 1.0=Φ12.5,Φ12.7,Φ13 M16:粗扣螺距2.0=Φ14 细扣螺距1.5 , 1.0=Φ14.5,Φ15M18:粗扣螺距2.5=Φ15.4 细扣螺距2.0 ,1.5 ,1.0=Φ15.9,Φ16.5,Φ17M20:粗扣螺距2.5=Φ17.4 细扣螺距2.0 , 1.5 , 1.0=Φ17.9,Φ18.5,Φ19M22:粗扣螺距2.5=Φ19.5 细扣螺距2.0 , 1.5 , 1.0=Φ19.9,Φ20.5,Φ21M24:粗扣螺距3.0=Φ20.9 细扣螺距2.0 , 1.5 , 1.0=Φ21.9,Φ22.5,Φ23生产中钻螺纹底孔公式:t<1mm: Dz=d-tt>1mm: Dz=d-(1.04~1.06)t式中 t 螺距(毫米)Dz 攻丝前钻头直径(毫米)d 螺纹公称直径(毫米)公制螺纹钻底孔用钻头直径尺寸表公称直径d 螺距t 钻头直径公称直径d 螺距t 公称直径dM1 粗 0.25 =0.75 M2 粗 0.4 =1.6细 0.2 =0.8 细 0.25 =1.75M3 粗 0.5 =2.5 M4 粗 0.7= 3.3细 0.35 =2.65 细 0.5 =3.5M5 粗 0.8 =4.2 M6 粗 1.0 =5.0细 0.5 =4.5 细 0.75 =5.2M8 粗 1.25 =6.7 M10 粗 1.5 =8.5细 1.0 =7.0 细 1.25 =8.7细 0.75 =7.2 细 1.0 =9.0细 0.75 =9.2M12 粗 1.75 =10.2 M14 粗 2.0 =11.9细 1.5 =10.5 细 1.5 =12.5细 1.25 =10.7 细 1.25 =12.7细 1.0 =11.0 细 1.0 =13.0M16 粗 2.0 =13.9 M18 粗 2.5 =15.4 细 1.5 =14.5 细 2.0 =15.9 细 1.0 =15.0 细 1.5 =16.5 细 1.0 =17.0M20 粗 2.5 =17.4 M22 粗 2.5 =19.4 细 2.0 =17.9 细 2.0 =19.9 细 1.5 =18.5 细 1.5 =20.5 细 1.0 =19.0 细 1.0 =21.0M24 粗 3.0 =20.9 M27 粗 3.0 =23.9 细 2.0 =21.9 细 2.0 =24.9 细 1.5 =22.5 细 1.5 =25.5 细 1.0 =23.0 细 1.0 =26.0M30 粗 3.5 =26.3 M33 粗 3.5 =29.3 细 3.0 =26.9 细 3.0 =29.9 细 2.0 =27.9 细 2.0 =30.9 细 1.5 =28.5 细 1.5 =31.5 细 1.0 =29.0M36 粗 4.0 =31.8 M39 粗 4.0 =34.8 细 3.0 =32.9 细 3.0 =35.9 细 2.0 =33.9 细 2.0 =36.9 细 1.5 =34.5 细 1.5 =37.5M42 粗 4.5 =37.3 M45 粗 4.5 =40.3 细 4.0 =37.8 细 4.0 =40.8 细 3.0 =38.9 细 3.0 =41.9 细 2.0 =39.9 细 2.0 =42.9 细 1.5 =40.5 细 1.5 =43.5M48 粗 5.0 =42.7 M52 粗 5.0 =46.7 细 4.0 =43.8 细 4.0 =47.8 细 3.0 =44.9 细 3.0 =48.9 细 2.0 =45.9 细 2.0 =49.9 细 1.5 =46.5 细 1.5 =50.5欢迎您的下载,资料仅供参考!致力为企业和个人提供合同协议,策划案计划书,学习资料等等打造全网一站式需求。