af=0.7 mm/r 切削宽度ae=0.5 mm 则主轴转速n = 1000v/?D =107 r/min 按机床选取n = 750 r/min
则实际切削速度V = ?Dn/(1000×60) = 2.94 m/s 铣削工时为:
L = 38 mm L1 = ae(d-ae)+1.5 = 7.5 mm L2 = 2.5 mm 基本时间tj = L/fmz = (38+7.5+2.5)/(2.96×60×8) = 0.03 min (10) 粗锪连杆两螺栓底面
选用钻床Z3025
根据《切削手册》表2.5,《工艺手册》表4.2-35选取数据 锪刀直径D = 28 mm 切削速度V = 0.2 m/s 锪刀齿数Z = 6 切削深度ap = 3 mm 进给量f = 0.10 mm/r 则主轴转速n = 1000v/?D = 50.9 r/min 按机床选取n = 750 r/min
则实际切削速度V = ?Dn/(1000×60) = 2.94 m/s 锪削工时为:
L = 28 mm L1 = 1.5 mm
基本时间tj = L/fn = (28+1.5)/(0.10×750×8) = 0.04 min (11) 铣轴瓦锁口槽
选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 63 mm 切削速度V = 0.31 m/s 铣刀齿数Z = 24 切削深度ap = 2 mm 切削宽度ae = 0.5 mm af = 0.02 mm/r 则主轴转速n = 1000v/?D = 94 r/min 按机床选取n=100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.33 m/s 铣削工时为:
L = 5 mm L1=0.5×63+1.5 = 33 mm L2 = 1.5 mm
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基本时间tj=L/fmz=(5+33+1.5)/(100×24)=0.02 min (12) 精铣螺栓座面 选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 63 mm 切削速度V = 0.47 m/s 铣刀齿数Z = 24 切削深度ap = 2 mm 切削宽度ae = 5 mm af=0.015 mm/r 则主轴转速n = 1000v/?D = 142 r/min 按机床选取n = 150 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.49 m/s 铣削工时为:
L = 28 mm L1 = ae(d?ae)+1.5 = 19 mm L2 = 3 mm 基本时间tj=L/fmz = (28+19+3)/(150×24) = 0.02 min (13) 精磨结合面
选用磨床M7130
根据《切削手册》表2.1,《工艺手册》表4.2-32选取数据 砂轮直径D = 40 mm 切削速度V = 0.330 m/s 切削深度ap = 0.1 mm 进给量fr0 = 0.006 mm/r 则主轴转速n = 1000v/?D = 157 r/min 根据表3.1—48 按机床选取n = 100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.20 m/s 磨削工时为: 按表2.5—11 基本时间tj=
zbk/nfr0z=0.02 min (
zb=0.1 k=1 z=8)
(14) 粗铣连杆上盖结合面
选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 75 mm 切削速度V = 0.35 m/s 切削宽度ae = 3 mm 铣刀齿数Z = 8 af = 0.12 mm/r 则主轴转速n = 1000v/?D = 89 r/min
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按机床选取n = 100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.39 m/s 铣削工时为:
L = 38 mm L1 = ae(d-ae)+1.5 = 16 mm L2 = 2.5 mm 基本时间tj = L/fmz=(38+16+2.5)/(100×8) = 0.07 min
(15) 精铣连杆上盖结合面 选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据
铣刀直径D = 75 mm 切削速度V = 0.42 m/s 切削宽度ae = 0.5 mm 铣刀齿数Z = 8 进给量f = 0.7 mm/r 则主轴转速n = 1000v/?D = 107 r/min 按机床选取n = 110 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.43 m/s 铣削工时为:
L = 38 mm L1 = ae(d-ae)+1.5 = 7.5 mm L2 = 2.5 mm 基本时间tj = L/fmz = (38+7.5+2.5)/(110×8) = 0.6 min (16)粗铣螺母座面
选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 63 mm 切削速度V = 0.34 m/s 铣刀齿数Z = 24 切削宽度ae = 5 mm af = 0.15 mm/r 则主轴转速n = 1000v/?D = 103 r/min 按机床选取n = 100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.39 m/s 铣削工时为:
L = 28mm L1 = ae(d-ae)+1.5 = 17.5 mm L2 = 2.5 mm 基本时间tj = L/fmz = (28+17.5+2.5)/(100×24) = 0.02 min
(17)铣轴瓦锁口槽
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选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 63 mm 切削速度V = 0.31 m/s 铣刀齿数Z = 24 切削深度ap = 2 mm 切削宽度ae = 0.6 mm af = 0.02 mm/r 则主轴转速n = 1000v/?D = 94 r/min 按机床选取n = 100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.33 m/s 铣削工时为:
L = 5 mm L1 = 0.5×63+1.5 = 33 mm L2 = 1.5 mm 基本时间tj =L/fmz = (5+33+1.5)/(100×24) = 0.02 min (18) 精磨结合面 选用磨床M7350
根据《切削手册》表2.1,《工艺手册》表4.2-33选取数据 砂轮直径D = 40 mm 切削速度V = 0.330 m/s 切削深度ap = 0.1 mm 进给量fr0 = 0.006 mm/r 则主轴转速n = 1000v/?D = 157 r/min 按机床选取n = 100 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.20 m/s 磨削工时为: 基本时间tj =
zbk/nfr0z= 0.02 min (
zb=0.1 k=1 z=8)
(19) 精铣连杆盖上两螺母座面
选用铣床X62W
根据《切削手册》表3.1,《工艺手册》表4.2-35选取数据 铣刀直径D = 63 mm 切削速度V = 0.47 m/s 切削宽度ae = 5 mm 铣刀齿数Z = 24 切削深度ap = 2 mm af = 0.015 mm/r 则主轴转速n = 1000v/?D = 142 r/min 按机床选取n = 150 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.49 m/s
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铣削工时为:
L = 28 mm L1 = ae(d-ae)+1.5 = 17.5 mm L2 = 2.5 mm 基本时间tj = L/fmz = (28+17.5+2.5)/(150×24) = 0.02 min (20) 钻螺栓孔
选用钻床Z3025
根据《切削手册》表2.1,《工艺手册》表4.2-11选取数据
切削速度V = 0.99 m/s 切削深度ap = 5 mm 进给量f = 0.08 mm/r 钻头直径D = 10 mm 则主轴转速n = 1000v/?D = 1910 r/min 按机床选取n = 910 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.99 m/s 钻削工时为:
L = 34 mm L1 = 1.5 mm L2 = 2 mm 基本时间tj = L/fn = (34+1.5+2)/(0.08×1910) = 0.23 min (21) 扩螺栓孔
选用钻床Z3025
根据《切削手册》表2.5《工艺手册》表4.2-11选取数据
扩刀直径D = 10 mm 切削速度V = 0.40 m/s 切削深度ap = 1.0 mm 进给量f = 0.6 mm/r 则主轴转速n = 1000v/?D = 764 r/min 按机床选取n=764 r/min
则实际切削速度V = ?Dn/(1000×60) = 0.40 m/s 扩削工时为: L = 34 mm L1 = 2 mm
基本时间tj = L/fn = (34+2)/(0.6×764) = 0.07 min (22) 铰螺栓孔
根据《切削手册》表2.6,《工艺手册》表4.2-11选取数据 铰刀直径D = 12.2 mm 切削速度V = 0.22 m/s 切削深度ap = 0.10 mm 进给量f = 0.2 mm/r
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