镗轴承半精镗 2 孔 精镗 3 镗刀 镗刀 0.5 0.25 0.3 0.4 0.25 0.1 54 54 25 2.4-66 2.4-38 2.4-41 端面螺钻削加1 纹（孔工 蜗麻花钻 25 0.081 0.24 杆） 功丝 2 丝锥 25 0.148 1.25 25 2.4-105 端面螺钻削加1 纹（孔工 蜗麻花钻 25 0.081 0.24 25 2.4-38 2.4-41 轮） 功丝 2 丝锥 25 0.148 1.25 25 2.4-105 轴承孔锪孔 倒角 1 锪刀 1 0.41 0.2 1 2.4-67 7.4 切削的工时定额
粗铣
n1000?Vs?3.14?1000?14.43.14?225
?20.38取53
fti?mz?fznzw?0.4?20?53
?424205?81.5?2424?0.7152
半精铣
ll1l2?270?8.30?2?0.7193?tif424mz 结合面的基本时间
ti?粗铣
l?l1?l2f?mz275?81.5?2?0.845242
ti?半精铣
l?l1?l2f?mz275?8.30?2?0.849424
磨结合面t?2lbzbk1000vaff（见《工艺手册》表6.2-8）
rt?2?220?71?1.11000?42?20?0.028734364 ?24108?1.43min当加工两个面时tm?2.86min 钻?13孔 L=30mm
l1?3mml2?1mm
nw?960r/min
l?l1?l2tm??nwf?430?3?1960?0.1?1.417min
?2?1.417?2当加工两组孔时t=tm
?2.834min钻孔?11 L=14mm
l1?3mm
l2?1mm
nw?960r/min
tm? ?l?l1?l2nwf?414?3?1960?0.1?0.75min
当加工两组孔时t=tm?2?1.50min 钻?19孔 L=25
l1?3
l2?1
nw?960r/min
tm?L?l1?l2nwf?4=
25?3?1?1.208min
960?0.1钻攻5-m6
钻L=18mm
l =3mm l12 =0
nw =960r/min
tm?L?l1?l2nwf?5=
18?3?5?1.0937min
960?0.1攻 L=15
l1?3mm
l2?0
nw?195r/min v=4.9r/min L?l1?l2tm?=
nwf?5
(15?3)?2?5?0.923min
195?1钻攻2-M8 钻L=20
lf1?3mm
l2?1mm
nw?960r/min
tm?攻
L?l1?l2n?2=
w20?3?1?2?0.5min
960?0.1nw?195 v=4.9r/min
1L=20mm
1lL?l?lt?nfmw?3mm
l2?1mm
2?2
=
(20?3?3)?2?2?0.53min
195?1钻攻2-M10 钻 L=25mm
l1?3mm
l1?1mm
nw?960r/min
tm?L?l1?l2nwf?2
25?3?1?2=960?0.1 ?0.604攻L=25mm
l1?3mm
l1?1mm
nw?195 v=4.9r/min
tm?L?l1?l2nwf?2
(25?3?3)?2 195?1?0.636min钻铰?25 f=0.41mm/r v=4.9m/min(见《机械加工工艺手册》表2.4-38;2.4-41)
ns?1000?12.251000?12.25?3.14?dw3.14?25
?155r/minnw?136
3.14dwnw?3.14?25?136实切削速度v=1000 1000?10.68m/mintm?L?l1?l2nwf=
25?5?4?0.61min
136?0.41铰孔?25 f=0.35 v=21m/min
ns?1000?2?267.5r/min
3.14?dwnw?260r/min(按《工艺手册》表4.2-2)
3.14dwnw?3.14?25?260 1000实切削速度v=
1000?20.4m/mintm?L?l1?l2nwf=
25?5?4?0.374min
260?0.35锪沉头孔f=0.21mm/r L=8
nw?44r/min
l1?2mm
=
l2?0
tm?L?l1?l2nwf8?2?1.08min
44?0.21钻攻M6 L=10mm
l1?3