Odkształcenie wytaczaka

Odkształcenie wytaczaka, siły skrawania i wymagana moc

Unit:

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)

Boring Bar Dimensions

D_o Outside diameter: in mm

D_i Inside Diameter / Coolant Hole Size: in mm

If bar does not have a coolant hole use 0

L Unsupported length: in mm

Boring Bar Material Properties

Em_c Modulus of elasticity: psi N/mm2

Workpiece

d Bore diameter: in mm

BHN Brinell Hardness:

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
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

Machining Conditions

a_p Depth of cut: in mm

f_n Feed rate: ipr mm/rev

V_c Cutting speed: sfm mm/min

E Machine tool efficiency factor:

Machine Tool Efficiency Factors

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

Calculate

Your Results

L/D_o Ratio of unsupported length to outside diameter:

I Moment of inertia of the boring bar cross section: in mm ⁴

n Spindle speed: rpm

Q_z Metal removal rate: in. cm ³/min

Dynamics of Boring

F_t Tangential force: lb N

F_f Radial force: lb N

F_r Resultant force: lb N

Y_t Maximum deflection: in mm

Horse Power Calculation

P_s Horsepower at the cutting tool: hp KW

P_m Horsepower at the motor: hp KW

T Torque: ft-lbs Nmm

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

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Odkształcenie wytaczaka