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Formulas for Cutting Power切削功率计算公式


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Formulas for Cutting Power

Formulas for Cutting Power
Cutting power in turning (Pc)
Pc(kW) ap(mm) Ac

tual Cutting Power Depth of Cut Input the values ap (mm) f (mm/rev) vc (m/min) Kc (MPa) η

f (mm/rev) Feed per Revolution vc (m/min) Cutting Speed Kc(MPa) η Specific Cutting Force (Machine Coefficient)

Calculate

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Pc (kw)

(Example) speed 120m/min with depth of cut 3mm and feed 0.2mm/rev (When the machine coefficient is 80%)?

(Answer) formula. Pc=(3×0.2×120×3100)÷(60×103×0.8)=4.65(kw)

What is cutting power required for machining mild steel at cutting Substitute the specific cutting force Kc=3100MPa into the

Values of Kc
Tensile strength (MPa) and hardness 520 620 720 670 770 770 630 730 600 900 352HB 46HRC 360 200HB Specific cutting force Kc(MPa) 0.1 0.2 0.3 0.4 0.6

Workpiece Material

(mm/rev) (mm/rev) (mm/rev) (mm/rev) (mm/rev) 3610 3080 4050 3040 3150 3830 4510 4500 3610 3070 3310 3190 2300 2110 3100 2700 3600 2800 2850 3250 3900 3900 3200 2650 2900 2800 1930 1800 2720 2570 3250 2630 2620 2900 3240 3400 2880 2350 2580 2600 1730 1600 2500 2450 2950 2500 2450 2650 2900 3150 2700 2200 2400 2450 1600 1400 2280 2300 2640 2400 2340 2400 2630 2850 2500 1980 2200 2270 1450 1330

Mild steel Medium steel Hard steel Tool steel Tool steel Chrome Manganese Steel Chrome Manganese Steel Chrome Molybdenum Steel Chrome Molybdenum Steel Nickel Chrome Molybdenum Steel Nickel Chrome Molybdenum Steel Hard Cast Iron Meehanite Cast Iron Gray Cast Iron

Cutting power in milling (Pc)
Pc(kW) ap(mm) ae(mm) Actual Cutting Power Depth of Cut Cutting Width Input the values ap (mm) ae (mm)

2011-08-19

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vf(mm/min) Table Feed per Min Kc(MPa) η Specific Cutting Force (Machine Coefficient)

vf (mm/min) Kc (MPa) η

Calculate

Reset
Pc (kw)

(Example) What is the cutting power required for milling tool steel at cutting speed 80m/min.With depth of cut 2mm,cutting width 80mm,and table feed 280mm/min by ?250cutter with 12 insert. Machine coefficient of 80%.

(Answer) First calculate the spindle speed in order to obtain feed per tooth. n=1000vc÷π D1=(1000×80)÷(3.14×250)=101.91min-1 Feed per tooth; fz=vf÷(z×n)=280÷(12×101.9)=0.228mm/tooth Substitute specific cutting force into the formula Pc=(2×80×280×1800)÷(60×106×0.8)=1.68kw

Values of Kc
Tensile strength (MPa) and hardness 520 620 720 670 770 770 630 730 600 940 352HB 520 46HRC 360 200HB 500 160 200 Specific cutting force Kc(MPa) 0.1 0.2 0.3 0.4 0.6

Workpiece Material

mm/tooth mm/tooth mm/tooth mm/tooth mm/tooth 2200 1980 2520 1980 2030 2300 2750 2540 2180 2000 2100 2800 3000 2180 1750 1150 580 700 1950 1800 2200 1800 1800 2000 2300 2250 2000 1800 1900 2500 2700 2000 1400 950 480 600 1820 1730 2040 1730 1750 1880 2060 2140 1860 1680 1760 2320 2500 1750 1240 800 400 490 1700 1600 1850 1700 1700 1750 1800 2000 1800 1600 1700 2200 2400 1600 1050 700 350 450 1580 1570 1740 1600 1580 1660 1780 1800 1670 1500 1530 2040 2200 1470 970 630 320 390

Mild steel Medium steel Hard steel Tool steel Tool steel Chrome Manganese Steel Chrome Manganese Steel Chrome Molybdenum Steel Chrome Molybdenum Steel Nickel Chrome Molybdenum Steel Nickel Chrome Molybdenum Steel Cast Iron Hard Cast Iron Meehanite Cast Iron Gray Cast Iron Brass Light Alloy(Al-Mg) Light Alloy(Al-Si)

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2011-08-19


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