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北华航天工业学院毕业论文
钻L=18mm
l1 =3mm l2 =0
nw =960r/min
t?l1?l2m?Ln5=
18?3960?0.1?5?1.0937min
wf?攻 L=15
l1?3mm
l2?0
nw?195r/min v=4.9r/min
t?L?l1?l2mnwf?5
=
(15?3)?2195?1?5?0.923min
钻攻2-M8 钻L=20
l1?3mm
l2?1mm
nw?960r/min
tL?l1?l220?3?1m?nf?2=
960?0.1?2?0.5min
w攻
nw?195 v=4.9r/min
L=20mm
l1?3mm
l2?1mm
t2m?L?l1?nl?2
wf=
(20?3?3)?2195?1?2?0.53min
钻攻2-M10 钻 L=25mm l1?3mm
l1?1mm
nw?960r/min
t?l1?l2m?Ln2
wf?25?3?1=960?0.1?2 ?0.604攻L=25mm
l1?3mm
l1?1mm
nw?195 v=4.9r/min
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北华航天工业学院毕业论文
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)
n?12.251000?12.s?10003.14?d?25w3.14?25
?155r/minnw?136
3.14dwnw?3.14?25?136实切削速度v=10001000 ?10.68m/mintL?l1?l2m?n=
25?5?4wf136?0.41?0.61min
铰孔?25 f=0.35 v=21m/min
n?2s?10003.14?d?267.5r/min
wnw?260r/min(按《工艺手册》表4.2-2)
3.14dwnw?3.14?25?260实切削速度v=
10001000 ?20.4m/mintL?l1?l225?5?4m?nwf=
260?0.35?0.374min
锪沉头孔f=0.21mm/r nw?44r/min
L=8
l1?2mm l2?0 t?L?l1?l28?2mn?1wf=44?0.21.08min 钻攻M6 L=10mm
l1?3
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北华航天工业学院毕业论文
t?L?nl1?l210?3?0m=?0.135min wf960?0.1L=10mm
l1?3
nw?195r/min v=4.9m/min
tL?l1?l2m?n=
(10?3)?2195?1?0.133min
wf钻攻M16 L=25mm
l1?3mm
l1?1mm
nw?960r/min
tL?l1?l2m?n=
25?3960?0.1?0.29min
wfL=22
l1?3 l2?2 nw?96r0/min t?L?l1?l2mn=(22?3?2)?2wf195?1.5?0.116min 铣端面 v=0.45m/r
dw?225 Z=20 相关手册n1000?2s?3.14?d?38r/min
w查《工艺手册》表4.2-39取nw?53r/min 3.14v=
dwnw1000?3.14?225?531000 ?37.4m/minfm?0.3?20?53?60mm/min
tL?l1?l2110?3?2m?n?0wf=318.3616min 因为有四面，所以t=0.733min 半精铣t=1.4465min 因为有四面，所以t=5.76min 镗孔?110
ap?2mm f =0.4mm/r
相关手册r=100m/min
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北华航天工业学院毕业论文
n1000v1000?100w?3.14?D?3.14?100?318.49r/mm取 318r/minL=53
l1?3 l2?2 t?L?l1?l2mn=53?3?2?0.46min wf318?0.4两个孔加工的机动时间 t=0.46x2=0.92min 半精镗
ap?1 f=0.5mm/r v=100
n1000vw?3.14?D?1000?1003.14?110?289.5r/mm取 318r/minL=53
l1?3 l2?2 t?L?l1?l253?3?2mnwf=
318?0.4?0.46min 两个孔的机动时间 t=0.46x2=0.92min
ap?0.1 f=0.1mm/r
nw?816r/min v=100m/min
t=0.92min 镗前后轴承孔同上 钻攻M12 钻 L=28
l1?3
l2?0 n =960r/min
t3m?L?nl1?l2=
28?wf960?0.24?0.405min
攻L=25
l1?3
l2?2 n=195r/min v=4.9m/min
tL?l1?l2(25?3?2)?2m?n195?2?3?0.462min
wf=
与四面轴承孔端面的孔一样，钻时0.405min ;攻时0.462min。锪轴承倒角：由查表可知n=68r/min v=8.26m/min
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