Setting method and control device for initial axial depth of cut of rotating cutting tool
Disclosed are a setting method and a control device of a depth of cut in an initial axial direction for a rotating cutting tool. A setting method of a depth of cut in an initial axial direction for a rotating cutting tool according to the present disclosure includes when a tool T is mounted on a spindle S, receiving an overhang length L of the tool T, the diameter D of the tool T, an overhang length ratio reference value C, and an axial depth of cut reference value E; calculating an axial depth of cut Y; and setting the axial depth of cut Y as an initial axial depth of cut of a cutting process.
1. A method for setting a depth of cut in an initial axial direction for a rotating cutting tool and operating the tool accordingly, comprising:
when a tool T is mounted on a spindle S, receiving, an overhang length L of the tool T, a diameter D of the tool T, an overhang length ratio reference value C, and an axial depth of cut reference value E;
calculating an axial depth of cut Y by Equations 1, 2, 3, and 4,
wherein Equation 1 is
A
=
L
D
A: Overhang length ratio
L: Overhang length
D: Tool diameter,
wherein Equation 2 is
B
=
C
A
B: Ratio of overhang length to reference value
A: Overhang length ratio
C: Overhang length ratio reference value,
wherein Equation 3 is
κ=B −3
κ: Rigidity weight
B: Ratio of overhang length to reference value, and
wherein Equation 4 is
Y=E×κ
Y: Axial depth of cut
κ: Rigidity weight
E: Axial depth of cut reference value (15);
setting the axial depth of cut Y as an initial axial depth of cut of a cutting process; and initiating the cutting process at the initial axial depth.
2. The method of claim 1 , further comprising:
subtracting a corrected constant n from the axial depth of cut by Equation 5 to calculate a corrected axial depth of cut Ad, wherein Equation 5 is
Ad=Y−n
Ad: Corrected axial depth of cut
Y: Axial depth of cut
n: Corrected constant; and
setting the corrected axial depth of cut Ad as an initial axial depth of cut of the cutting process.
3. The method of claim 2 , wherein
when the axial depth of cut Y is equal to or more than 10 mm, calculating and setting of the corrected axial depth of cut Ad is not performed,
when the axial depth of cut Y is less than 10 mm and equal to or more than 5 mm, 0.1 mm is the corrected constant n subtracted for calculating the corrected axial depth of cut Ad,
when the axial depth of cut Y is less than 5 mm and equal to or more than 2 mm, 0.2 mm is the corrected constant n subtracted for calculating the corrected axial depth of cut Ad, and
when the axial depth of cut Y is less than 2 mm, 0.3 mm is the corrected constant n subtracted for calculating the corrected axial depth of cut Ad.
4. A control device for implementing the method of claim 1 , comprising:
a processor; and
a non-transitory computer readable medium including:
first instructions executable by the processor to calculate an axial depth of cut Y by the Equations 1, 2, 3, and 4;
second instructions executable by the processor to set an axial depth of cut Y as an initial axial depth of cut of a cutting process; and
third instructions executable by the processor to initiate a cutting process at an initial axial depth.
5. A control device for implementing the method of claim 2 , comprising:
a processor; and
a non-transitory computer readable medium including:
first instructions executable by the processor to calculate an axial depth of cut Y by the Equations 1, 2, 3, and 4;
second instructions executable by the processor to set an axial depth of cut Y as an initial axial depth of cut of a cutting process;
third instructions executable by the processor to initiate a cutting process at an initial axial depth;
fourth instructions executable by the processor to subtract a corrected constant n from an axial depth of cut by the Equation 5 to calculate a corrected axial depth of cut Ad; and
fifth instructions executable by the processor to set a corrected axial depth of cut Ad as an initial axial depth of cut of a cutting process.
6. A control device for implementing the method of claim 3 , comprising:
a processor; and
a non-transitory computer readable medium including:
first instructions executable by the processor to calculate an axial depth of cut Y by the Equations 1, 2, 3, and 4;
second instructions executable by the processor to set an axial depth of cut Y as an initial axial depth of cut of a cutting process;
third instructions executable by the processor to initiate a cutting process at an initial axial depth;
fourth instructions executable by the processor to subtract a corrected constant n from an axial depth of cut by the Equation 5 to calculate a corrected axial depth of cut Ad; and
fifth instructions executable by the processor to set a corrected axial depth of cut Ad as an initial axial depth of cut of a cutting process, wherein the fourth and fifth instructions include:
respective instructions executable by the processor to prohibit calculating and setting a corrected axial depth of cut Ad when an axial depth of cut Y is equal to or more than 10 mm;
respective instructions executable by the processor to set 0.1 mm as the corrected constant n subtracted for calculating a corrected axial depth of cut Ad when an axial depth of cut Y is less than 10 mm and equal to or more than 5 mm;
respective instructions executable by the processor to set 0.2 mm as the corrected constant n subtracted for calculating a corrected axial depth of cut Ad when an axial depth of cut Y is less than 5 mm and equal to or more than 2 mm; and
respective instructions executable by the processor to set 0.3 mm as the corrected constant n subtracted for calculating a corrected axial depth of cut Ad when an axial depth of cut Y is less than 2 mm.