Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1982-06-28
1985-01-01
Albritton, C. L.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
2191241, 21912434, B23K 916, B23K 932
Patent
active
044917155
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to the welding and welding equipment, and more particularly, it deals with apparatus for gas-shielded arc welding.
DESCRIPTION OF THE PRIOR ART
A large number of apparatus for gas-shielded arc welding are known in the art which comprise a mechanism for guiding the electrode and for feeding it to the welding zone, a nozzle for feeding a shielding gas to the welding zone and a TV transmission camera which is employed for obtaining information on the welding performance (cf., for example, an article by I. V. Shergov et al. "Nabludenie protsessa svarki s pomoschju televisionnoi apparatury", magazine "Svarochnoe proizvodstvo", No. 5, 1969, page 24). In the prior art apparatus TV transmission cameras are provided with special attachments enabling the provision of the image of the welding zone in the open-arc welding. The use of this prior art method for welding thick plate materials is not possible since limited size of the groove space between edges of workpieces being welded does not enable an operative visual monitoring of the process, and the installation of a TV camera directly adjacent to the welding bath is impossible.
Known in the art is also an apparatus for gas-shielded arc welding for making long welds in which two TV cameras are used for monitoring the process. (cf., for example, F. V. Voronin, I. V. Shergov "Distantsionnoe vedenie i vizualny kontrol protsessov svarki plavleniem", NIIinformtyazhmash, issue 10-74-2,Moscow, 1974, pages 25-27, FIG. 9).
The employment of such apparatus for welding thick plate materials is also impossible because the TV cameras are made in the form of individual structural components arranged in the front end part of the apparatus. Since welding in a narrow welding groove is accompanied with an intensive directive release of combustion products (soot, smoke), monitoring the process becomes virtually impossible owing to a rapid formation of dust deposit on the surfaces of optical components of TV transmission camera. The absence of monitoring during the welding makes the process impossible owing to a large number of uncontrollable deviations from the performance resulting in flaws in the form of undercuts, slagging, cold welds and the like.
DISCLOSURE OF THE INVENTION
The invention is based on the problem of providing an apparatus for gas-shielded arc welding of thick plate materials with TV monitoring of the conditions in the welding zone and deviations from preset welding conditions during the welding.
This problem is solved by that in an apparatus for gas-shielded arc welding, comprising a mechanism for guiding and feeding an electrode to the welding zone, a nozzle for feeding a shielding gas to the welding zone and a TV transmission camera for monitoring the welding performance, according to the invention, a cover plate made of an optically transparent material is provided at the end of the nozzle remote from the welding zone, and a lens of the TV transmission camera is installed on the cover plate coaxially with the nozzle, the distance from the cover plate to the lens being selected in such a manner that the zone of sharpness of the lens is located beyond the edge of the nozzle adjacent to the welding zone and extends over the components of the welding process to be monitored.
In applications where grids are arranged within the nozzle in superposed relation to one another for forming a flow of shielding gas the grids are preferably arranged in an offset position relative to one another so that meshes of upstream grids are overlapped by bridges forming meshes of downstream grids to form, in combination, a filter attenuating light flux emitted by components of the welding process.
The apparatus for gas-shielded arc welding according to the invention ensures monitoring of the process through a gas nozzle and makes it possible to obtain complete information on the condition of components participating in the welding process, such as electrode, welding arc, metal bath, as well as on deviations of parameters of th
REFERENCES:
patent: 3671707 (1972-06-01), Cunningham
patent: 3696230 (1972-10-01), Friedrich
A. M. Godridge, "Development and Use of a TV System for Viewing Flames", Conference on the Operation of Instruments in Adverse Environment, 1977, pp. 95-102.
Gorb Vyacheslav F.
Shergov Igor V.
Sidorov Viktor V.
Voronin Felix V.
Albritton C. L.
Nauchno-Proizvodstvennoe Obiedinenie PO Tekhnologii Mashinostroe
Sigda Catherine M.
LandOfFree
Apparatus for gas-shielded arc welding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for gas-shielded arc welding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for gas-shielded arc welding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-578484