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How to calculate the feed value of the machining center? - PTJ Manufacturing Shop

calculate feed value of the machining center

How is the feed value of the cnc machining center calculated? It is very important for programmers and practitioners.

feed value of the machining centerTo correctly calculate the feed value of the cnc machining center, we can look at the following two points:

  • It depends on the machine that the machining center actually works. Knife high speed, low feed, large knife low speed, high feed. The amount of hard material under the knife is small, the amount of knife under the soft material is large, and the sticking knife should pay attention to cooling.
  • in addition, it has a theoretical value, that is, the line speed multiplied by 1000 divided by 3.14 in addition to the knife diameter, this is told to me, but I don't know if it is right, about this problem, don't care too much about the so-called absolute value of the machining center. There is tolerance between theory and practice, so it is said that the students coming out of the school can't mix it. The real processing is that no one is going to calculate the line speed.
The following formula can be used as a reference. Actually, look at the hardness of the material in the machining center.
Spindle speed setting during machining:
N=1000×V/(π×D)
Note: N------ Spindle speed (rpm/min)
V-------cutting speed (m/min)
D-------Tool diameter (mm)
Processing feed rate setting:
Note: F-----feed rate (mm/min)
M-----Tool edge number
Fn-----Cutter size of the tool (mm/rev)
Setting per blade:
Fn=Z×Fz
Note: Z-----number of blades
Fz-----cutting amount per tool (mm/rev)

Parameters when ordinary steel is roughed

Tool diameter margin Undercut Rotating speed(S) Feed(F) Normal processing depth
D21R0.8 0.3 0.3 1800 2500 70
D16R0.8 0.3 0.3 2000 2500 70
D12 0.15 0.25 2500 2500 50
D10 0.15 0.25 2800 2200 45
D8 0.15 0.25 3600 2200 40
D6 0.15 0.25 4000 2200 35
D4 0.15 0.13 4500 1800 20

The parameters of flat knife and flying knife for ordinary steel light knife

Tool diameter Margin Rotating speed(S) Feed(F) Feed in the light plane
D50R5 0.18 1500 1500 600
D30R0.8 0.15 2000 1500 600
D20R0.8 0.15 2000 1500 500
D16R0.8 0.15 2200 1500 500
D12 0.1 2000 1500 500
D10 0.1 2000 1500 500
D8 0.1 2200 1500 500
D6 0.08 3500 1500 500
D4 0.07 4500 1500 500
D3 0.07 6000 1200 400
D2 0.06 10000 800 400
D1 0.04 12000 500 300

Ball cutter parameters for ordinary steel light knife

Tool diameter Step Rotating speed(S) Feed(F)
R6 0.15 3600 1700
R5 0.14 4000 1700
R4 0.13 4500 1700
R3 0.13 5000 1500
R2 0.1 5500 1500
R1.75 0.08 6000 1500
R1.5 0.08 6000 1500
R1 0.06 10000 1200
R0.5 0.05 12000 800

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