Каталог Stellram токарный инструмент - страница 196
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Каталог Stellram материалы и сплавы
Каталог Stellram твердосплавные цельные фрезы
Каталог Stellram фрез со сменными пластинами
Каталог Stellram высокопроизводительные фрезерные системы
Каталог Stellram системы со сменными пластинами для фрезерования с высокими подачами
Calculations of Cutting Forces & Power
Calculations of Cutting Forces Terminology
The main force F can be split into 3 different forces: F Ft(N)= Tangential force, downward and
f
usually the largest
Direction of feed F (N)= Axial force or feed force, toward the
Direction of feed p Ff
longitudinal axis of the workpiece Fp (N)= Radial force on the perpendicular of the centre line of the workpiece F
t
Cutting Force in Turning
F
Formula
| * The specific cutting force (kc) is constant for each material. It | Values F | are affected by the | |
| f and Fp | |||
| is unique for each material and it refers to the material | approach angle, the cutting depth and the | ||
| machinability. See catalog page C196. | nose radius of the tool. The following |
formula can be used for the tangential cutting force: Fc=Kcxarxf Calculations of Power
in which:
| The availability for the power calculation for the material | Kc = Specific cutting force(N/mm2)* |
| ar = Cutting depth (mm) | |
| removal is particularly important for roughing, so it is | = Feed (mm/rev) |
f necessary to verify if the machine’s power is enough for the application. The parameters for the power calculation are v .
c and Fc Formula The machine efficiency ŋ, is also a factor to be considered The formula for the net cutting power referring to the energy loss because of the drive and the calculation is: motor efficiency. This value is between 0,7-0,9 depending on the machine. Vc x Fc P = (KW)
- x 60 x 1000
Where Fc = apxfxKc = VcxapxfxKc (KW) then P
- x 60 x 1000
KW to HP conversion: 1 KW = 1.34102209 hp