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汽車(chē)連桿加工工藝及其夾具設(shè)計(jì)(完整版)

  

【正文】 510一次精鏜21213520擴(kuò)5913毛坯尺寸59() 則連桿兩端面總的加工余量為:A總= =(A粗銑+A精銑+A粗磨+A精磨)2=(+++)2=mm連桿鑄造出來(lái)的總的厚度為H=38+=mm(2)小頭孔各工序尺寸及其公差(根據(jù)《機(jī)械制造技術(shù)基礎(chǔ)課程設(shè)計(jì)指導(dǎo)教程》 表2—29表2—30) 小頭孔各工序尺寸及其公差工序名稱(chēng)工序基本余量工序經(jīng)濟(jì)精度工序尺寸表面粗糙度最小極限尺寸精鏜79鉸69擴(kuò)5913鉆=24101324580 計(jì)算工藝尺寸鏈 連桿體的卡瓦槽的計(jì)算增環(huán)為: ; 減環(huán)為: ;封閉環(huán)為:(1)極限尺寸為: = = mm== mm(2)的上、下偏差為:= ()= mm= = mm3)、的公差為: =()= mm4)、的基本尺寸為:==135 = 8 mm5)、的最終工序尺寸為:= m 工時(shí)定額的計(jì)算 銑連桿大小頭平面選用X52K機(jī)床根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—81選取數(shù)據(jù)銑刀直徑D = 160 mm Z=6 背吃刀量ap = 3 mm主軸轉(zhuǎn)速n = 600r /min進(jìn)給量f=則實(shí)際切削速度V = Dn/(100060) = m/s 銑削工時(shí)為:—10 L= 3 mm L1 = + =50 mm L2 = 3 mm基本時(shí)間tj = L/fm z = (3+50+3)/(60036) = min—46 輔助時(shí)間ta = = min 粗磨大小頭平面選用M7331磨床 根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—170選取數(shù)據(jù)砂輪直徑D = 160 mm 切削深度ap = mm Z = 8主軸轉(zhuǎn)速n = 100 r/min磨削速度V = Dn/(100060) = m/s 磨削工時(shí)為:—11基本時(shí)間tj = zbk/nfr0z = (1)/(1008) = min—40 輔助時(shí)間ta = min 加工小頭孔(1) 鉆小頭孔 選用鉆床Z33s1 根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—38(41)選取數(shù)據(jù)鉆頭直徑D = 20 mm 背吃刀量ap = 10 mm 進(jìn)給量f = mm/r則主軸轉(zhuǎn)速n = 800 r/min鉆削速度V = Dn/(100060) = m/s 鉆削工時(shí)為:—7L = 10 mm L1 = mm L2 = 基本時(shí)間tj = L/fn = (10++)/(800) = min—41 輔助時(shí)間ta = min—42 其他時(shí)間tq = min(2) 擴(kuò)小頭孔 選用鉆床Z33s1根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—53選取數(shù)據(jù)擴(kuò)刀直徑D = 30 mm 切削深度ap = mm 進(jìn)給量 f = mm/r則主軸轉(zhuǎn)速n =400 r/min則實(shí)際切削速度V = Dn/(100060) = m/s 擴(kuò)削工時(shí)為:—7L = 10 mm L1 = 3 mm基本時(shí)間tj=L/fn=(10+3)/(400)= min—41 輔助時(shí)間ta= min(3) 鉸小頭孔 選用鉆床Z33s1根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—81選取數(shù)據(jù)鉸刀直徑D = 30 mm 切削深度ap = mm 進(jìn)給量f = mm/r主軸轉(zhuǎn)速n = 200 r/min則實(shí)際切削速度V = Dn/(100060) = m/s 鉸削工時(shí)為: —7L=10 mm L1 =0 L2=3 mm基本時(shí)間tj = L/fn = (10+3)/(200) = min—41 輔助時(shí)間ta = min 銑大頭兩側(cè)面選用銑床X62W根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—77(88)選取數(shù)據(jù)銑刀直徑D = 16 mm 銑刀齒數(shù)Z = 3 背吃刀量ap = 4 mm F=30mm/min主軸轉(zhuǎn)速n = 750 r/min切削速度V = Dn/(100060) = m/s 銑削工時(shí)為:—10 L=40 mm L1=+= mm L2= mm基本時(shí)間tj = L/fmz = (40++)/(7503)= min—46 輔助時(shí)間ta = = min 擴(kuò)大頭孔選用鉆床床Z575 刀具:擴(kuò)孔鉆根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—54選取數(shù)據(jù)擴(kuò)孔鉆直徑D = 34 mm 進(jìn)給量f = mm/r 背吃刀量ap = mm 主軸轉(zhuǎn)速n = 354 r/min切削速度V=Dn/(100060)= m/s 擴(kuò)削工時(shí)為: —7L = 40 mm L1 = 3 mm L2 =3 mm 基本時(shí)間: 銑開(kāi)連桿體和蓋 選用銑床X62W根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—79(90)選取數(shù)據(jù)銑刀直徑D = 63 mm 切削寬度ae = 3 mm 銑刀齒數(shù)Z = 24 背吃刀量ap = 2 mm af = mm/r d = 40 mm 主軸轉(zhuǎn)速n = 750 r/min切削速度V = Dn/(100060) = m/s 銑削工時(shí)為: —10 L = = 17 mm L1 = +2 = 6 mm L2 = 2 mm基本時(shí)間tj= Li/FM = (17+6+2)/(148) = min—46 輔助時(shí)間ta== min 加工連桿體(1) 粗銑連桿體結(jié)合面 選用銑床X62W根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—74(84)選取數(shù)據(jù)銑刀直徑D = 60 mm 切削寬度ae = mm 銑刀齒數(shù)Z = 8 背吃刀量ap=1 mm af = mm/r主軸轉(zhuǎn)速n = 600r/min切削速度V = Dn/(100060) = m/s 銑削工時(shí)為: —10 L = 38 mm L1 = + = mm L2 = mm基本時(shí)間tj = L/fnz = (38++)/(6008) = min—46 輔助時(shí)間ta== min(2) 精磨結(jié)合面 選用磨床M731根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—170選取數(shù)據(jù)砂輪直徑D = 40 mm 切削深度ap = mm 進(jìn)給量fr0 = mm/r主軸轉(zhuǎn)速n = 157 r/min切削速度V = Dn/(100060) = m/s 磨削工時(shí)為: —11 基本時(shí)間tj= zbk/nfr0z = min (zb= k=1 z=8) 銑、磨連桿蓋結(jié)合面(1) 粗銑連桿上蓋結(jié)合面 選用銑床X62W根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—74(84)選取數(shù)據(jù)銑刀直徑D = 75 mm 切削寬度ae = 3 mm 銑刀齒數(shù)Z = 8 af = mm/r 主軸轉(zhuǎn)速n = 100 r/min切削速度V = Dn/(100060) = m/s 銑削工時(shí)為:—10 L = 38 mm L1 = + = 16 mm L2 = mm基本時(shí)間tj = L/fmz=(38+16+)/(1008) = min—46 輔助時(shí)間ta== min(2) 精銑連桿上蓋結(jié)合面 選用銑床X62W根據(jù)《機(jī)械制造工藝設(shè)計(jì)手冊(cè)》—84選取數(shù)據(jù)銑刀直徑D = 75 mm 切削寬度ae = mm
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