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절삭력

선삭 애플리케이션을 위한 절삭 부하, 토크 및 마력

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

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

D Diameter

in mm

HB Brinell Hardness

p Power Constant

Workpiece			"p" Values (hp/in.³/min) for machining conditions:			"p" Values (kW/cm³/min) for machining conditions:
Type of material	Designation	Calculate Hardness	Finishing	Roughing	General	Finishing	Roughing	General
Carbon steel	AISI 1018	141	0.70	0.66	0.62	0.03322	0.03094	0.02867
Carbon steel	AISI 1045	195	0.74	0.70	0.72	0.03458	0.03140	0.03276
Alloy steel	AISI 4140	194	0.79	0.74	0.73	0.03777	0.03322	0.03367
Alloy steel	AISI 4340	214	0.76	0.72	0.73	0.03822	0.03322	0.03367
Alloy steel	AISI 4140	258	0.85	0.77	0.79	0.04004	0.03504	0.03595
Alloy steel	AISI 4142	277	0.84	0.77	0.75	0.04050	0.03504	0.03595
Alloy steel	AISI 4340	485	1.31	1.00	1.05	0.05961	0.04687	0.04869
Tool steel	AISI H11	205	0.78	0.73	0.76	0.03822	0.03367	0.03504
Stainless steel	AISI 316L	147	0.81	0.73	0.73	0.03822	0.03185	0.03322
Stainless steel	AISI 410	243	0.81	0.71	0.74	0.03868	0.03367	0.03413
Stainless steel	AISI 17-4 PH	294	0.99	0.70	0.72	0.04551	0.03367	0.03458
Gray cast iron	SAE G3000	195	0.53	0.48	0.47	0.02730	0.02184	0.02184
Ductile cast iron	ASTM 65-45-12	165	0.58	0.55	0.51	0.03003	0.02366	0.02366
Titanium alloy	AMS Ti-6Al-4V	287	0.64	0.62	0.62	0.03094	0.02776	0.02867
Nickel alloy	Inconel 718	277	1.20	1.01	1.02	1.05961	0.04596	0.04733
Aluminum alloys	AMS 2024	139	0.31	0.29	0.30	0.01547	0.01320	0.01365

hp/ln.³/min. kW/cm³/min

Machining Conditions

a_p Depth of cut

inmm

L Length of cut

inmm

f_n Feed rate

ipr.mm/rev

V_c Cutting speed

sfm.m/min

E Machine tool efficiency factor

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

Calculated Machining Conditions

n Spindle speed

rpm1/min

Q Metal removal rate

ln.3/min.cm³/min

t Cutting time

min

Cutting Forces Calculation

F_t Tangential force

lbN

F_f Feed force

lbN

F_r Radial force

lbN

R Resultant force

lbN

Horse Power Calculation

P_s Horsepower at the cutting tool

hpKW

P_m Horsepower at the motor

hpKW

F_f Torque

ft. lbs.N-m

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