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1. WO2013005172 - APPARATUS AND METHOD FOR DETERMINING THE EFFECTIVE CEMENTATION OR NITRIDING DEPTH OF STEEL COMPONENTS, IN PARTICULAR GEARS

Publication Number WO/2013/005172
Publication Date 10.01.2013
International Application No. PCT/IB2012/053422
International Filing Date 04.07.2012
Chapter 2 Demand Filed 29.05.2013
IPC
G01B 11/06 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
02for measuring length, width, or thickness
06for measuring thickness
G01B 21/08 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
21Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the other groups of this subclass
02for measuring length, width, or thickness
08for measuring thickness
G01N 25/18 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
25Investigating or analysing materials by the use of thermal means
18by investigating thermal conductivity
CPC
C21D 9/32
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
32for gear wheels, worm wheels, or the like
G01B 21/085
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
21Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups
02for measuring length, width, or thickness
08for measuring thickness
085using thermal means
G01J 2005/0048
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
5Radiation pyrometry
0048Calibrating; Correcting
G01J 5/52
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
5Radiation pyrometry
50using techniques specified in the subgroups below
52using comparison with reference sources, e.g. disappearing-filament pyrometer
G01J 9/00
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
9Measuring optical phase difference
G01N 21/84
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
84Systems specially adapted for particular applications
Applicants
  • GE AVIO S.R.L. [IT]/[IT] (AllExceptUS)
  • MILLETARI, Salvatore [IT]/[IT] (UsOnly)
  • GIUNTA, Salvatore [IT]/[IT] (UsOnly)
Inventors
  • MILLETARI, Salvatore
  • GIUNTA, Salvatore
Agents
  • JORIO, Paolo
Priority Data
TO2011A00058904.07.2011IT
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) APPARATUS AND METHOD FOR DETERMINING THE EFFECTIVE CEMENTATION OR NITRIDING DEPTH OF STEEL COMPONENTS, IN PARTICULAR GEARS
(FR) APPAREIL ET PROCÉDÉ POUR DÉTERMINER LA PROFONDEUR EFFECTIVE D'UN DURCISSEMENT SUPERFICIEL OU NITRURATION DE COMPOSANTS MÉTALLIQUES, NOTAMMENT D'ENGRENAGES
Abstract
(EN)
An apparatus (1) for determining the effective case-hardening or nitriding depth of a steel component comprises a measuring head (2), including a laser source (10) generating a variable frequency radiation for the scanning of pre-determined portions of the component to be measured (20); an infrared detector (16), configured so as to detect infrared radiation generated by the component to be measured; and computing means (17) of spectra of the infrared radiation received; and an evolventimeter (3), connected to the measuring head (2) and including first computing means (26, 40-56) suitable for computing a hardness profile of the component to be measured on the basis of a launch profile and spectra of the infrared radiation received and second computing means (26, 58) suitable for computing the effective case-hardening depth from the hardness profile computed.
(FR)
Selon l'invention, un appareil (1) servant à déterminer la profondeur effective d'un durcissement superficiel ou nitruration d'un composant métallique comprend: une tête de mesure (2) munie d'une source laser (10) émettant un rayonnement de fréquence variable pour l'exploration de parties prédéterminées du composant à mesurer (20); un détecteur infrarouge (16) conçu pour détecter le rayonnement infrarouge émis par le composant à mesurer; des moyens de calcul (17) de spectres du rayonnement infrarouge reçu; et un évolumètre (3) relié à la tête de mesure (2) et comprenant de premiers moyens de calcul (26, 40-56) conçus pour calculer un profil de dureté du composant à mesurer sur la base d'un profil de lancement et des spectres du rayonnement infrarouge reçu, et de seconds moyens de calcul (26, 58) conçus pour calculer la profondeur effective du durcissement superficiel à partir du profil de dureté calculé.
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