Setting method and control device for initial axial depth of cut of rotating cutting tool

Patent metadata

Field	Value
Publication number	US-9604287-B2
Application number	US-201414300412-A
Country	US
Kind code	B2
Filing date	Jun 10, 2014
Priority date	Jun 10, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

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.

First claim

What is claimed is:

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.

Assignees

• Doosan Infracore Co Ltd
• Doosan Machine Tools Co Ltd

Inventors

• Lee Kang Jae
• Song Jin Suk
• Jang Han Kee

Classifications

• B23C2255/00

  Regulation of depth of cut · CPC title

• B23C3/00 Primary

  Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, {heat assisted machining B23P25/00}) · CPC title

• B23B2260/048

  Devices to regulate the depth of cut · CPC title

• B23B35/00 Primary

  Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods · CPC title

• B23Q15/22 Primary

  Control or regulation of position of tool or workpiece · CPC title