數(shù)控加工參數(shù)表(共6頁(yè))

1、一、主軸轉(zhuǎn)速n(r/min)主軸轉(zhuǎn)速一般根據(jù)切削速度V來(lái)選定，計(jì)算公式為：n=1000V（×d）式中，d為刀具直徑（mm），V為刀具切削速度（m/min）。對(duì)于球頭銑刀，工作直徑要小于刀具直徑，故其實(shí)際轉(zhuǎn)速應(yīng)大于計(jì)算轉(zhuǎn)速n。表  銑刀的切削速度V                        (單位：m/min)工件材料銑刀材料碳素鋼高速鋼超硬高速

2、鋼硬質(zhì)合金碳化鈦碳化鎢鋁合金75150180300300600鎂合金180270150600硬鋁合金45100120190黃銅（軟）12252025100180青銅1020204060130青銅（硬）101515204060鑄鐵（軟）10121520182575100鑄鐵（硬）101510204560冷硬鑄鐵10153060可鍛鑄鐵10152030254075110鋼（低碳）1014182820304570鋼（中碳）1015152518284060鋼（高碳）101512203045合金鋼3580合金鋼（硬）3060高速鋼12254570二、進(jìn)給速度Vf (mm/min)  

3、  Vf = fz×z×n式中n為主軸轉(zhuǎn)速，z為銑刀齒數(shù)，fz為每齒進(jìn)給量（mm/齒）.    每齒進(jìn)給量fz的選取主要取決于工件材料的力學(xué)性能、刀具材料、工件表面粗糙度等因素。工件材料的強(qiáng)度和硬度越高，fz越??；反之則越大。硬質(zhì)合金銑刀的每齒進(jìn)給量高于同類(lèi)高速鋼銑刀。工件表面粗糙度要求越高，fz就越小。1銑削加工表2  銑刀每齒進(jìn)給量fz                

4、60;                             (單位：mm/齒)     銑刀工件材料面銑刀立銑刀成形銑刀高速鋼鑲?cè)械队操|(zhì)合金鑲?cè)械惰T鐵0.20.050.040.30.1可鍛鑄鐵0.150.050.040.30.09低碳鋼0.20.050.040.30.09中高

5、碳鋼0.150.040.030.20.08鑄鋼0.10.050.040.20.08鎳鉻鋼0.10.020.020.150.06高鎳鉻鋼0.10.020.020.10.05黃銅0.20.050.040.030.21青銅0.150.050.040.030.1鋁0.10.060.040.020.1Al-Si合金0.10.050.040.180.08Mg-Al-Zn0.10.050.030.150.08Al-Cu-Mg0.10.050.040.020.1Al-Cu-Si2鏜削加工 表3  鏜孔切削用量工序鑄鐵鋼鋁及鋁合金V(m/min)f(mm/r)V(m/min)f(mm/r)V(m/mi

6、n)f(mm/r)粗鏜高速鋼20250.20.625300.20.61001500.51.5硬質(zhì)合金303511.535550.20.61002500.81.5半精鏜高速鋼20350.150.4525350.10.51002000.20.5硬質(zhì)合金50700.20.555850.150.551203000.30.6精鏜高速鋼22400.080.3525370.10.351202500.10.4硬質(zhì)合金70900.120.3560800.150.351504000.10.43、攻螺紋   攻螺紋前底孔直徑的確定：攻米制螺紋   螺距P<1mm：d0=

7、dP                 P>1mm：d0=d（1.041.06）P式中  P 螺距(mm)      d0 鉆頭直徑(mm)       d 螺紋公稱(chēng)直徑(mm)攻不通孔螺紋        鉆孔深度=所需螺孔深度0.7 d表4&#

8、160; 攻普通螺紋前的底孔直徑螺紋公稱(chēng)直徑d螺距P鉆頭直徑d0鑄鐵、青銅黃銅、鋁及鋁合金鋼、紫銅可鍛鑄鐵20.40.251.61.751.61.752.50.450.352.052.152.052.1530.50.352.52.652.52.6540.70.53.33.53.33.550.80.54.14.54.24.5610.754.95.255.281.2510.756.66.97.16.777.2101.51.2510.758.48.68.99.18.58.799.2121.751.51.25110.110.410.610.910.210.510.711螺紋公稱(chēng)直徑d螺距P鉆頭直徑d0

9、鑄鐵、青銅黃銅、鋁及鋁合金鋼、紫銅可鍛鑄鐵1421.5111.812.412.91212.5131621.5113.814.414.91414.515182.521.5115.315.816.416.915.51616.517202.521.5117.317.818.418.917.51818.519222.521.5119.319.820.420.919.52020.52124321.5120.721.822.422.9212222.523表5  攻英制螺紋前的底孔直徑公稱(chēng)直徑/非螺紋密封管螺紋英制錐管螺紋英制錐螺紋每25.4內(nèi)的牙數(shù)鉆頭直徑/每25.4內(nèi)的牙數(shù)鉆頭直徑/每25.4

10、內(nèi)的牙數(shù)鉆頭直徑/1/8288.8288.4278.61/41911.71911.21811.13/81915.21914.71814.51/21418.91418.31417.93/41424.41423.61423.211130.61129.71129.21141139.21138.31137.91381141.61121145.11144.11143.921155.81156表6  攻螺紋切削速度（單位：m/min）工件材料鑄鐵鋼及合金鋼鋁及鋁合金切削速度V2.551.555154、鉆孔加工表7  用高速鋼鉆頭鉆孔切削用量    

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12、;     (f單位：mm/r)工件材料牌號(hào)或硬度切削用量鉆頭直徑1661212222250鑄鐵HB160-200V1624f0.070.120.120.20.20.40.40.8HB200-241V1018f0.050.10.10.1800.180.250.250.4HB300-400V512f0.030.080.080.150.150.20.20.3鋼35、45V825f0.050.10.10.20.20.30.30.4515Cr、40CrV1230f0.050.10.10.20.20.30.30.45合金鋼V818f0.030.080.080.15

13、0.150.250.250.35鋁純鋁V2050f0.020.150.050.30.080.50.150.8鋁合金V2050f0.020.10.040.20.080.40.10.7銅黃銅青銅V6090f0.020.10.10.20.20.250.250.75硬青銅V2545f0.030.050.050.150.120.250.250.5（用合金鉆頭進(jìn)行孔加工時(shí)，可適當(dāng)提高轉(zhuǎn)速和進(jìn)給量。）5、鉸孔加工鉸孔屬于精加工工序，加工過(guò)程中應(yīng)合理選擇鉸刀的類(lèi)型及材質(zhì)，高速鋼鉸刀屬于通用鉸刀，硬質(zhì)合金鉸刀一般用于加工鋼、鑄鋼、灰鑄鐵和冷硬鑄鐵。為了達(dá)到較高的孔徑精度和表面質(zhì)量，應(yīng)采用較低的切削速度和進(jìn)給量并合理選擇切削液。鉸孔前應(yīng)留有鉸削余量，一般為0.10.2mm 底孔直徑=鉸刀直徑（0.10.2）mm鉸削加工時(shí)切削速度V取315m/min進(jìn)給