Patent US3739628A successfully refreshed from Google Patents.
US3739628A
Expired / Lapsed
US
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Ultrasonic testing of welds
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1971-06-10
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Granted: 1973-06-19
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Expires: 1991-06-10
Abstract
Abstract In a method of testing for flaws in metallurgical welds using ultrasonic waves, the interval of time between sending a wave and receiving a flaw echo is made constant by appropriately moving the or each ultrasonic wave sensor relative to the workpiece under inspection, for each measurement. The or each sensor is moved along a rectilinear path forming an angle with the surface of the workpiece which is a function of the angle of incidence of the ultrasonic waves and of the speeds of the waves in the workpiece and the medium above the surface.
Inventors
- 👤 R Saglio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:39
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/26; G01N29/265; G01N29/04; G01N29/043; G01N29/07; G01N2291/00; G01N2291/02; G01N2291/023; G01N2291/0234; G01N2291/04; G01N2291/042; G01N2291/0421; G01N2291/0422; G01N2291/044; G01N2291/10; G01N2291/102; G01N2291/26; G01N2291/267; G01N2291/2675
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
129 words
A method of testing for flaws in metallurgical welds by ultrasonic wave inspection using a sensor comprising a transmitter and receiver or unitary transmitter receiver moved toward and away from the weld, wherein the interval of time between each initial echo and any corresponding flaw echo is made constant for each inspection measurement by moving at least one ultrasonic wave sensor relative to the workpiece under inspection along a rectilinear path forming a constant angle Beta with the surface of said workpiece, angle Beta being a function of the angle of incidence Alpha of incident transVerse waves, of the speed V1 of the longitudinal waves in the medium above the surfce of the workpiece, and of the speed Vtm of the transverse waves in the material of the workpiece.
Claim 2
Independent Claim
129 words
A method of testing for flaws in metallurgical welds by ultrasonic wave inspection using a sensor comprising a transmitter and receiver or unitary transmitter receiver moved toward and away from the weld, wherein the interval of time between each initial echo and any corresponding flaw echo is made constant for each inspection measurement by moving at least one ultrasonic wave sensor relative to the workpiece under inspection along a rectilinear path forming a constant angle Beta with the surface of said workpiece, angle Beta being a function of the angle of incidence Alpha of incident transVerse waves, of the speed V1 of the longitudinal waves in the medium above the surfce of the workpiece, and of the speed Vtm of the transverse waves in the material of the workpiece.
Claim 3
Dependent Claim
31 words
A method according to claim 1 wherein said workpiece is steel and said medium is water, Alpha is given an optimum value of 23*30'', Beta is of the order of 31*.
Claim 4
Dependent Claim
31 words
A method according to claim 1 wherein said workpiece is aluminium and said medium is water, Alpha is given an optimum value of 24*30'', Beta is of the order of 34*.
Claim 5
Dependent Claim
23 words
A method according to claim 1, wherein two transmitter-receiver sensors are used which operate with transverse waves which are orthogonal to one another.
Claim 6
Dependent Claim
68 words
A method according to claim 1, wherein two transmitter sensors are used, the first of which operates with transverse waves with a constant path-time at a sensor displacement angle Beta , the second operates with longitudinal waves with a constant path-time and moves normally to said surface, while the two sensors operate in a coupled relationship in accordance with the Delta technique and also with the constant path-time.
Claim 7
Independent Claim
171 words
A method of testing for flaws in metallurgical welds by ultrasonic wave inspection using a transmitter sensor and a receiver sensor moved toward and away from the weld wherein the interval of time between each initial echo and any corresponding flaw echo is made constant for each inspection measurement by moving at least one ultrasonic wave sensor relative to the workpiece under inspection along a rectilinear path forming a constant angle Beta with the surface of said workpiece, angle Beta being a function of the angle of incidence Alpha of incident transverse waves, of the speed V1 of the longitudinal waves in the medium above the surface of the workpiece, and of the speed Vtm of the transverse waves in the material of the workpiece using the Delta inspection technique and wherein the transmitter sensor is moved along the straight line forming an angle Beta with the surface and the angle Beta is also dependent upon the speed V1m of the longitudinal waves in the material of the workpiece under inspection.
Claim 8
Independent Claim
171 words
A method of testing for flaws in metallurgical welds by ultrasonic wave inspection using a transmitter sensor and a receiver sensor moved toward and away from the weld wherein the interval of time between each initial echo and any corresponding flaw echo is made constant for each inspection measurement by moving at least one ultrasonic wave sensor relative to the workpiece under inspection along a rectilinear path forming a constant angle Beta with the surface of said workpiece, angle Beta being a function of the angle of incidence Alpha of incident transverse waves, of the speed V1 of the longitudinal waves in the medium above the surface of the workpiece, and of the speed Vtm of the transverse waves in the material of the workpiece using the Delta inspection technique and wherein the transmitter sensor is moved along the straight line forming an angle Beta with the surface and the angle Beta is also dependent upon the speed V1m of the longitudinal waves in the material of the workpiece under inspection.
Claim 9
Dependent Claim
25 words
A method according to claim 6, wherein the receiver sensor is a focusing sensor operating with its focus superimposed on the weld point under inspection.
Claim 10
Dependent Claim
16 words
A method according to claim 7, wherein the receiver sensor is moved perpendicularly to the surface.
Claim 11
Independent Claim
32 words
A method according to claim and 7, wherein the transmitter sensor comprises two transmitter elements moving symmetrically in relation to the path, perpendicular to said surface, followed by the focusing receiver sensor.
Claim 12
Dependent Claim
43 words
A method according to claim 6, wherein the ratio of the respective speeds of displacement of the transmitter and receiver sensors is a constant gamma for a given material under inspection and for a given value of the angle of incidence Alpha .
Claim 13
Dependent Claim
34 words
A method according to claim 10, wherein said workpiece is steel and said medium is water, Alpha is equal to 23*30'', Beta is of the order of 41* and gamma is equal to 1.033.
Claim 14
Dependent Claim
34 words
A method according to claim 10, wherein said workpiece is aluminium and said medium is water, Alpha is equal to 24*30'', Beta is of the order of 43* and gamma is equal to 1.042.
References Cited (Backward Citations)
US3274822A
Cited
US3302453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |