Milling calculation formula
- 1. Processing time Tc [sec]
- Tc
- =
- 60 x L x π x DC
- fz x z x vc x 1,000
- =
- 60 x L
- vf
- 2. Required power Pc [kW]
- Pc
- =
- Q x kc
- 60 x 1,000 x (Ƞ ÷100)
- =
- ap x ae x vf x kc
- 60 x 106 x (Ƞ ÷100)
- 3. Cutting speed vc [m/min]
- vc
- =
- π x DC x n
- 1,000
- 4. Spindle speed n [min-1]
- n
- =
- vc x 1,000
- π x DC
- 5. Feed per edge fz [mm/t]
- fz
- =
- vf x π x DC
- z x vc x 1,000
- =
- vf
- z x n
- 6. Feed rate vf [mm/min]
- vf
- =
- fz x z x vc x 1,000
- π x DC
- =
- fz x z x n
- 7. Horsepower required H [HP]
- H
- =
- Pc
- 0.75
- 8. Maximum chip thickness hex1 [mm]
【 ae ≦ DCx0.5 】
- Hex1
- =
- ae
- DC
- -
- ae
- DC
- 2
- x fz x 2 x sin(KAPR)
【 DCx0.5 ＜ ae ≦ DC 】
- Hex1
- =
- fz x sin(KAPR)
- 9. Maximum chip thickness ( Circular blade ) hex2 [mm]
- Hex1
- =
- ap
- IC
- -
- ap
- IC
- 2
- x fz x 2
- 10. Chip discharge Q [cm3 /min]
- Q
- =
- ap x ae x fz x z x vc
- π x DC
- =
- ap x ae x vf
- 1,000
Specific cutting resistance Kc Approximate value
- P
- Non-alloy steel1,500 MPa
- Low-alloy steel2,000 MPa
- High alloy steel3,000 MPa
- M
- Austenite system2,000 MPa
- Ferritic system2,500 MPa
- K
- Malleable cast iron900 MPa
- Gray cast iron1,200 MPa
- Nodular cast iron1,500 MPa
- N
- Aluminum alloy500 MPa
- Copper alloy900 MPa
- S
- Ti base1,400 MPa
- Fe base2,500 MPa
- Ni base2,800 MPa
- Co base3,000 MPa
- H
- High hardness steel 50-55HRC3,300 MPa
- High hardness steel 60-63HRC4,500 MPa
- High hardness cast iron3,500 MPa
- Tc
- Processing time[sec]
- Pc
- Required power[kW]
- vc
- Cutting speed[m/min]
- n
- Spindle speed[min-1]
- fz
- Feed per edge[mm/rev]
- vf
- Feed rate[mm/min]
- H
- Horsepower required[HP]
- hex1
- Maximum chip thickness[mm]
- hex2
- Maximum chip thickness ( Circular blade )[mm/min]
- Q
- Chip discharge[cm3/min]
- L
- Processing length[mm]
- DC
- Milling cutter diameter[mm]
- IC
- Blade diameter[mm]
- KAPR
- Principal deflection angle[°]
- ap
- Cut deep[mm]
- ae
- Cutting width[mm]
- z
- Number of blades[pcs]
- Kc
- Specific cutting resistance[MPa]
- Ƞ
- Mechanical power[%]（70~85）
- ※ π ≒ 3.14
Consulting
