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