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KM 可转位扭矩和功率

适用于带 KM 快换刀具的可转位刀片立铣刀

These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.

Conversion of Workpiece Material Rockwell (Optional)

Skip this step if you already know the Brinell hardness number(HB)

Hardness HRB OR HRC into Brinell Hardness (HB)

Rockwell HRCRockwell HRB

Characteristics of Workpiece Materials

Brinell Hardness

Ultimate strength

PSI N/mm 2

End Mill Nomenclature

d1 Effective cutting diameter

in.mm.

d_KM Input KM size

d1 Distance from the centerline to the nose radius of the insert

in. mm.

l2 Distance from the flange face to the nose radius of the insert

in. mm.

z Number of inserts

Machining Conditions

V_c Cutting speed

sfm m/min

a_p Axial Depth of cut

in.(DOC) mm (DOC)

a_e Radial width of cut

in.(WOC) mm(WOC)

f_z Required feed per tooth

in. IPT (chip load) mm

C_m Machinability factor

Most Common Workpiece Materials	Cm at W/D ratios:
Most Common Workpiece Materials	W/D < = 0.66	0.66 < W/D < 1.0	W/D = 1.0
Aluminum alloys	1.0	1.05	1.1
Carbon and alloy steels	1.0	1.15	1.3
Cast irons	1.0	1.15	1.3
Titanium alloys	1.0	1.20	1.4
Stainless steel, High-temperature alloys	2.0	2.15	2.3

Tool wear factor

Milling	Depth of cut	Feed per tooth	C_w
Category	(min-max), in.	(min-max), in.
Light	0.020-0.100	0.003-0.006	1.1
Medium	0.100-0.200	0.006-0.010	1.2
Heavy duty	0.200-0.400	0.010-0.020	1.3

E Machine efficiency factor

Direct Belt Drive	.9
Back Gear Drive	.75
Geared Head Drive	.7-.8
Oil - Hydraulic Drive	.6-.9

Safe Operating Conditions

C_L Empirical coefficient for load

F_max Maximum permissible load applied to KM joint

lbN

F_tmax Maximum permissible tangential force

lbN

C_T Empirical coefficient for torque

T_max Maximum permissible torque applied to KM joint

ft lbNm

T_p Maximum permissible actual torque

ft lbNm

Calculated Machining Conditions

n Spindle speed

RPM

V_f Feed rate

(IPM)(no productivity formula)mm/min

Reduced feed per tooth

in (chip load at the cut) mm/min

F_p Feed rate

(IPM)(with productivity formula)mm/min

Q Metal removal rate

in.³/min MRRcm3/min³

A Cross-sectional area of chip

in.²mm²

Number of flutes in the cut

Ratio of radial width of cut to cutting diameter

Calculated Required Power

F_t Tangential cutting force

lbf should not exceed Ft maxN

T Actual torque

ft-lb should not exceed TpNm

Machining Power

at the cutter

HPckW

at the motor

hpkW

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