Patent US3431508A successfully refreshed from Google Patents.
US4507540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding method combining laser welding and MIG welding
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1983-03-15
•
Granted: 1985-03-26
•
Expires: 2003-03-15
Abstract
Abstract Welding of deep penetration is obtained in a sustrate by a method which comprises first melting the joint portion of the substrates by MIG welding and then focusing a laser beam in the bottom surface of a crater formed in consequence of the MIG welding thereby effecting laser welding of the crater.
Inventors
- 👤 Masanobu Hamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:37
CPC Classifications
B; B23; B23K; B23K28/00; B23K28/02; B23K26/00; B23K26/20; B23K26/21; B23K26/24; B23K26/346; B23K26/348
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A welding method, which comprises setting a laser beam source and a MIG welding torch thereby allowing MIG welding first to melt the joint portion of substrates and subsequently enabling the laser beam to be focused near the bottom surface of a crater dug to a great depth by the impulsive force of molten metal particles and the force of arc plasma stream to attain the welding with deep penetration.
Claim 2
Dependent Claim
70 words
A welding method, which comprises setting a laser beam source and a MIG welding torch thereby allowing MIG welding first to melt the joint portion of substrates and subsequently enabling the laser beam to be focused near the bottom surface of a crater dug to a great depth by the impulsive force of molten metal particles and the force of arc plasma stream to attain the welding with deep penetration.
Claim 3
Dependent Claim
86 words
A welding method combining laser welding with MIG welding, which comprises: interposing between the upper portions of the opposed surfaces of two substrates a groove large enough to be filled up with the molten metal resulting from MIG welding, adjusting the focal point of the laser beam to the root portion of said groove, and subjecting the molten metal formed by the laser beam at the root portion of said groove to MIG welding before said molten metal is allowed to solidify thereby obtaining deep penetration.
Claim 4
Dependent Claim
86 words
A welding method combining laser welding with MIG welding, which comprises: interposing between the upper portions of the opposed surfaces of two substrates a groove large enough to be filled up with the molten metal resulting from MIG welding, adjusting the focal point of the laser beam to the root portion of said groove, and subjecting the molten metal formed by the laser beam at the root portion of said groove to MIG welding before said molten metal is allowed to solidify thereby obtaining deep penetration.
Claim 5
Dependent Claim
20 words
A method according to claim 2, wherein the angle of said groove is in the range of 35° to 50°.
References Cited (Backward Citations)
SU187894A1
Cited
US3165619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |