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1、高速鋼鉆頭的切削用量(推薦值)硬質(zhì)合金鉆頭的切削用量(推薦值)鉆頭直徑切削速度進(jìn)給量進(jìn)給速度鉆頭直徑切削速度進(jìn)給量進(jìn)給速度加工材料加工材料(?d)V(m/min)f(mm/r)F(mm/min)(?d)V(m/min)f(mm/r)F(mm/min)623.60.11251075.40.15360825.50.12122碳素結(jié)構(gòu)1589.50.183421025.10.14112鋼和優(yōu)質(zhì)20103.60.22363碳素結(jié)構(gòu)15260.1899碳素結(jié)構(gòu)25117.80.25375鋼和優(yōu)質(zhì)2025.50.2289鋼(HB125301130.28336～225）碳素結(jié)構(gòu)25240.2576
2、351040.3285鋼(HB12530220.286540100.50.33264～225）35200.35540190.35531062.80.240045170.42501584.80.2239660150.540鑄鐵2094.20.25375(HB120251020.28364620.70.15165～225）3094.20.3300823.90.21903593.40.332801023.60.261954087.90.352451525.90.32176鑄鐵2025.10.38152(HB1202527.50.42147～225）3026.40.48134注：1.以上切削
3、參數(shù)使用條件：孔深=3?d；硬質(zhì)合金鉆頭3519.80.5294內(nèi)冷充分冷卻。40150.55662.對孔的精度要求較高或孔表面粗糙度要求較高時，4514.10.660可適當(dāng)提高轉(zhuǎn)速，降低進(jìn)給量。6014.10.6549鉆頭直徑mm<φ15<φ15~φ30<φ30~φ50進(jìn)給量mm/r0.05~0.150.15~0.250.20~0.30硬質(zhì)合金鉆頭線速度ν=100~120m/min高速鋼鉆頭(HSS)1>Q235-Aν=30m/min2>16Mnν=20m/min切削速度ν：刀類相對于工件的線速度ν=π?d?n即圓周長×轉(zhuǎn)速高速鋼鉆頭線速度：ν=25~30m/min進(jìn)給量（吃刀量）
4、mm/r鉆頭每轉(zhuǎn)一轉(zhuǎn)走的長度（軸向），取：0.2mm/rmm/刃×Z（齒數(shù)）取0.1~0.2mm/刃硬質(zhì)合金鉆頭線速度ν=100~120m/min孔的精度：孔徑公差；孔的表面光潔度鉆孔精度：孔距公差；孔的垂直度THETWISTDRILLSThetwistdrillisthemoresimpletoolfordrillingholescylindrical,usuallyfromsolid.Thetwistdrillisformedby:?byacylindricalorconicalshanktocenteronthespindleofthemachineandtransmitthe
5、cuttingtorque(byfrictionordragtooth)?byacylindricalpartinwhicharecarriedtwoopposinghelicalgrooves,whichintersectwithsurfaceendsformthetwomaincuttingedges.Thetwohelicalgroovesallowtheevacuationofthechipthatisformedatthecuttingedges,andleadnearthesame,thelubricating/coolantfluid.Characteristicele
6、mentsofendsThecheckordrivingsurfaces(withrakeanglelowerbyabout2°)areformedbytwooff-setdiametricallyopposedtothelimitofthehelicalgroovesandhaveadualfunction:?drivingthetipintotheholewithouteventhejamduringdrilling,becausethecontactbetweenthedrillandsidesoftheholeislimited.?finishingthecylindrica
7、lsurfaceofthehole.Thecentralcore(centralscrapingedge)betweenthetwogrooveshasadiameter(0.1~0.2)×Dandprovidestogivethetorsionalstrengthtothedrillduringmachining.HoweverforaholemadebyatwistdrillwecanbeobtainedthemaximumstandardofIT10
