Общий каталог Tungaloy 2020 - 2021 - страница 1648

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Calculation formulas for milling

Cutting speed

Cutting speed (Calculated from number of revolutions)

nvCutting speed (m/min)
c ：
D ：Effective diameter (mm)〔DC, DCX〕
vn ：Number of revolutions (min- 1)
fπ
5 3.14
a
aeNumber of revolution (Calculated from cutting speed)

p

Feed speed and feed per tooth v f : Feed speed (mm/min) fz : Feed per tooth (mm/t) z : No. of teeth of the cutter n : Number of revolutions (min-1) f Feed speed is relative speed of cutter and Workpiece material and in the z (Feed per tooth)

f (Feed per revolution) normal milling machine, it is the table speed.

In milling, the feed per tooth is very important. The recommended cutting f v condition is expressed by c and fz and using the above equation calculate n and v and input in the machine.

f

Cutting time on face milling

T： Cutting time (min) L ： Total table feed length. (R: Workpieces length (mm) + øD : c Effective cutter diameter (mm) D DC, DCX v ： Feed speed (mm/min) f 〔 〕The notation in the brackets is the one used in the catalog (ISO compliant)

Depth o f cut and width o f cut

Depth of cut Determine by required allowance for machining and capacity of the machine. In case of mill, there are cutting limits according to shape and size of the

insert. Please see spec in the catalogue.aDepth of cut (mm)
p :
Width of cut and engagement angleD ： Cutter diameter (mm)
There is an appropriate engage angleDC, DCX
Center〔〕
cuttingdepending on the cutter diameter, cutting
Vcposition, Workpiece material, etc., andE ： Engage angle
ordinarily the values in the table belowaeWidth of cut (mm)
D：
are used as a guide.〔 〕The notation in the brackets is the
Eone used in the catalog (ISO compliant)

Shoulder Center cutting Shoulder cutting

cutting

Workpiece materialAppropriate ECutter dia. andaeWorkpiece materialAppropriate ECutter dia. and ae
Steel~ 42°2 ae�� D 3Steel~ 30°3 ae�� D 5
Cast iron~ 53°4 ae�� D 5Cast iron~ 40°3 ae�� D 4