* 用1000去除,为将mm换算成m Dividing by 1000 is to convert mm into m
(例题) 主轴转速1350min-1钻头直径φ12.求切削速度 (Example) rotation speed of spindle is 1350min-1 and drill bit diameter isφ2, calculate cutting speed.
(答) 将π=3.14, D1=12, n=1350代入公式, (Answer) integrateπ=3.14,D1=12,N=1350 in the formula;
据此,得出切削速度为50.9m/min. Therefore, derive that cutting speed is 50.9m/min
◆.主轴进给量Feed of spindle( vf ):
vf=fr·n (mm/min)
vf(mm/m)
: 主轴(Z轴)进给速度 Feeding speed (Z-axis) of spindle
fr (mm/rev)
: 每转进给量 Feed per revolutions
n (min-1)
: 主轴转速 Rotation speed of spindle
(例题) 每转进给量为0.2 mm/rev.转速为1350 min-1 求主轴进给速度 (Example)Feed per revolution is 0.2mm/rev and rotation speed is 1350min-1,calculate feeding speed of spindle.
(答) 将π=3.14, D1=12, n=1350代入公式, (Answer) integrateπ=3.14,D1=12,N=1350 in the formula;
vf=fr×n = 0.2 ×1350=270 mm/min
由此得出主轴每分钟进给量为270mm/min. From here, it is derived that feeding distance of spindle is 270mm/min
◆.孔加工时间Hole machining time( Tc )
Tc(min)
: 加工时间 Machining time
n (min-1)
: 主轴转速 Rotation speed of spindle
Id(mm)
: 钻孔深 Depth of drilled holes
fr(mm/rev)
: 每转进给量 Feed per revolution
I
: 孔数 Number of hole
(例题) 在SCM440 钢上钻φ15,深30mm的孔。切削速度为
50m/min,每转进给量为0.15 mm/rev,求钻削时间
(Example) Drill bit a hole ofφ15 and 30mm deep in SCM440 steel,
cutting speed is 50m/min, and feed per revolution is 0.15mm/rev. Calculate cutting time.