切削抵抗

For Turning Application

Unit:

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

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

Hardness HRB OR HRC into Brinell Hardness (HB)

Characteristics of Workpiece Materials

D Diameter: in mm

HB Brinell Hardness: HB

p Power Constant: hp/ln.³/min. kW/cm³/min

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
	AISI 316L	147	0.81	0.73	0.73	0.03822	0.03185	0.03322
	AISI 410	243	0.81	0.71	0.74	0.03868	0.03367	0.03413
	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

Machining Conditions

a_p Depth of cut: in mm

L Length of cut: in mm

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

計算

Calculated Machining Conditions

n Spindle speed: rpm 1/min

Q Metal removal rate: ln.3/min. cm³/min

t Cutting time: min

Cutting Forces Calculation

F_t Tangential force: lb N

F_f Feed force: lb N

F_r Radial force: lb N

R Resultant force: lb N

Horse Power Calculation

P_s Horsepower at the cutting tool: hp KW

P_m Horsepower at the motor: hp KW

F_f Torque: ft. lbs. N-m

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