Method and device for determining the wear of a cutting tool flank

Patent metadata

Field	Value
Publication number	US-2016290906-A1
Application number	US-201415038200-A
Country	US
Kind code	A1
Filing date	Nov 26, 2014
Priority date	Nov 29, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A method of determining the wear of a flank of a cutter tool, in which the wear is determined by a general function calculating a characteristic length of the wear as a function of at least one variable that depends on time, is provided.

First claim

1 . A determination method for determining the wear of a flank of a cutter tool, wherein said wear is determined with a general function calculating a characteristic length of said wear as a function of at least one variable representative of operating conditions of machining performed by the cutter tool, the method comprising the steps of:
calculating a first value of said characteristic length by a first function; calculating a second value of said characteristic length by a second function; and calculating said general function as the maximum of said first value and said second value.

2 . A determination method according to claim 1 , wherein said wear is determined in real time.

3 . A determination method according to claim 1 , wherein the first function and/or the second function depends on constants determined by machining tests.

4 . A determination method according to claim 1 , wherein the characteristic length of the wear of the flank is calculated as a function of cutting speed, feed per revolution and per tooth, depth of cut, cutting energy, and radial force.

5 . A determination method according to claim 1 , wherein the first function depends on time t and the first function is of the form:
f 1( Vc,fz,Ec,t )=10 A1 Vc B1 fz C1 Ecc D1 where Vc is the cutting speed, fz the feed per revolution and per tooth, Ecc the accumulated cutting energy, and A 1 , B 1 , C 1 , and D 1 are four constants.

6 . A determination method according to claim 1 , wherein the second function depends on time t, and the second function is of the form:
f 2( Vc,fz,Fr,t )=10 A2 10 [B2+C2 log(fz)+D2 log(Vc)]·log(Frc) where Vc is the cutting speed, fz the feed per revolution and per tooth, Frc the accumulated radial force, and A 2 , B 2 , C 2 , and D 2 are four constants.

7 . A determination method according to claim 1 , wherein the first function depends on cutting length Lc and the first function is of the form:
f 1( Vc,fz,Lc )=10 A1 Vc B1 fz C1 Lc D1 where Vc is the cutting speed, fz the feed per revolution and per tooth, Lc the cutting length, and A 1 , B 1 , C 1 , and D 1 are four constants.

8 . A computer program including instructions for executing steps of the determination method according to claim 1 , wherein said program is executed by a computer.

9 . A computer readable data medium including a computer program comprising instructions for executing steps of the determination method according to claim 1 .

10 . A device for determining the wear of a flank of a cutter tool for machining a part, the device having means for determining a characteristic length of said wear, said determination means taking account of at least one variable representative of the operating conditions of machining performed by the cutter tool, and said determination means being configured to:
calculate a first value of said characteristic length by a first function; calculate a second value of said characteristic length by a second function; and calculate said characteristic length as the maximum of said first value and said second value.

Assignees

• Snecma

Inventors

• Rancic Mickael
• Batista Nicolas
• Hebuterne Damien

Classifications

• G01N3/58

  Investigating machinability by cutting tools; Investigating the cutting ability of tools · CPC title

• G01N3/56 Primary

  Investigating resistance to wear or abrasion · CPC title