Apparatus and method for determining the effective cementation or nitriding depth of steel components, in particular gears
First Claim
1. Apparatus for determining the effective case-hardening or nitriding depth of a steel gear to be measured, comprising:
- an evolventimeter suitable for identifying a portion of said gear to be measured and of a reference gear of the non case-hardened non-nitrided type; and
a measuring head connected to the evolventimeter and including a laser source configured to generate a variable frequency radiation for scanning portions of the gear to be measured and of the reference gear identified by the evolventimeter;
and wherein said measuring head furthermore comprises;
an infrared detector configured to detect infrared radiation generated by the gear to be measured and by the reference gear in response to scanning by the laser source;
first processing means configured to determine, on the basis of the infrared radiation detected, at least one between a first and a second measured spectrum, the first measured spectrum indicating the difference between the phase of the infrared radiation generated by the gear to be measured and the phase of the infrared radiation generated by the reference gear, the second measured spectrum indicating the difference between the amplitude of the infrared radiation generated by the gear to be measured and the amplitude of the infrared radiation generated by the reference gear;
first computing means configured to compute a calculated hardness profile of the gear to be measured, on the basis of a launch profile equal to a first hardness profile, and of said at least one between the first and the second measured spectrum; and
second computing means configured to compute the effective case-hardening or nitriding depth, on the basis of the calculated hardness profile.
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Accused Products
Abstract
An apparatus for determining the effective case-hardening or nitriding depth of a steel component comprises a measuring head, including a laser source generating a variable frequency radiation for the scanning of pre-determined portions of the component to be measured; an infrared detector, configured so as to detect infrared radiation generated by the component to be measured; and computing means of spectra of the infrared radiation received; and an evolventimeter, connected to the measuring head and including first computing means 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 suitable for computing the effective case-hardening depth from the hardness profile computed.
5 Citations
12 Claims
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1. Apparatus for determining the effective case-hardening or nitriding depth of a steel gear to be measured, comprising:
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an evolventimeter suitable for identifying a portion of said gear to be measured and of a reference gear of the non case-hardened non-nitrided type; and a measuring head connected to the evolventimeter and including a laser source configured to generate a variable frequency radiation for scanning portions of the gear to be measured and of the reference gear identified by the evolventimeter; and wherein said measuring head furthermore comprises; an infrared detector configured to detect infrared radiation generated by the gear to be measured and by the reference gear in response to scanning by the laser source; first processing means configured to determine, on the basis of the infrared radiation detected, at least one between a first and a second measured spectrum, the first measured spectrum indicating the difference between the phase of the infrared radiation generated by the gear to be measured and the phase of the infrared radiation generated by the reference gear, the second measured spectrum indicating the difference between the amplitude of the infrared radiation generated by the gear to be measured and the amplitude of the infrared radiation generated by the reference gear; first computing means configured to compute a calculated hardness profile of the gear to be measured, on the basis of a launch profile equal to a first hardness profile, and of said at least one between the first and the second measured spectrum; and second computing means configured to compute the effective case-hardening or nitriding depth, on the basis of the calculated hardness profile. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining the effective case-hardening or nitriding depth of a steel gear, comprising the steps of:
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identifying a portion of said gear to be measured and of a reference gear of non case-hardened non-nitrided type; scanning with a variable frequency laser radiation the identified portions of the gear to be measured and of the reference gear; detecting infrared radiation generated by the gear to be measured and by the reference gear in response to the laser scanning; determining, on the basis of the infrared radiation detected, at least one between a first and a second measured spectrum, the first measured spectrum indicating the difference between the phase of the infrared radiation generated by the gear to be measured and the phase of the infrared radiation generated by the reference gear, the second measured spectrum indicating the difference between the amplitude of the infrared radiation generated by the gear to be measured and the amplitude of the infrared radiation generated by the reference gear; acquiring a first hardness profile; generating a launch profile on the basis of said first hardness profile; determining a computed hardness profile of the gear to be measured, modifying the launch profile on the basis of said at least one between the first and the second measured spectrum; and determining the effective case-hardening or nitriding depth, on the basis of the hardness profile computed. - View Dependent Claims (9, 10, 11, 12)
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Specification