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Forza, coppia e potenza

Per applicazioni di fresatura a candela

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)

Characteristics of Workpiece Materials

Brinell Hardness: HB

Ultimate strength: PSI N/mm 2

Note: Ultimate Strength shown for generic steel. Please enter the actual value of your workpiece material if available, for better accuracy You may look up this info through websites such as www.matweb.com

End Mill Nomenclature

d1 Effective cutting diameter: in. mm

z Number of inserts/cutter:

Machining Conditions

V_c Cutting speed: sfm m/mm

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

C_w 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

Calcola

Calculated Machining Conditions

n Spindle speed: RPM

V_f Feed rate: IPM (no productivity formula) mm/min (no productivity formula)

Reduced feed per tooth: in. (chip load at the cut) mm/min (chip load at the cut)

F_p Feed rate: IPM (with productivity formula) mm/min (with productivity formula)

Q Metal removal rate: MRR cm3/min

A Cross-sectional area of chip: in.² mm²

z_c Number of flutes in the cut:

a_e/d₁ Ratio of radial width of cut to cutting diameter:

Calculated Required Power

F_t Tangential cutting force: lb N

T Torque at the cutter: in.-lb Nm

Machining Power

P_s at the cutter: HPc kW

P_m at the motor: hp kW

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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