DE952294C - Process for additional heating of resistance welds between weak and thick-walled components - Google Patents
Process for additional heating of resistance welds between weak and thick-walled componentsInfo
- Publication number
- DE952294C DE952294C DEST5131A DEST005131A DE952294C DE 952294 C DE952294 C DE 952294C DE ST5131 A DEST5131 A DE ST5131A DE ST005131 A DEST005131 A DE ST005131A DE 952294 C DE952294 C DE 952294C
- Authority
- DE
- Germany
- Prior art keywords
- thick
- heat
- substances
- additional heating
- walled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Verfahren zum zusätzlichen Erwärmen von Widerstands-Schweißstellen zwischen schwach- und starkwandigen Bauteilen Die Erfindung betrifft die Warmbehandlung von Widerstands-Schweißverbindungen zwischen Bauteilen geringer und großer Wandstärke, insbesondere zwischen Rohren bzw. Rohrstutzen oder ähnlichen kleinen Bauteilen und der dicken Wandung von Druckbehältern bzw. Rohrplatten.Method for additional heating of resistance welds Between weak-walled and thick-walled components The invention relates to heat treatment of resistance welded connections between components with small and large wall thicknesses, in particular between pipes or pipe sockets or similar small components and the thick walls of pressure vessels or tube plates.
Bei Schweißungen der genannten Art, bei denen also verhältnismäßig dünnwandige Bauteile unmittelbar mit solchen von wesentlich größerer Wandstärke verbunden werden, ergibt sich immer die Schwierigkeit, daß der schwere Bauteil wegen der bedeutend größeren Wärmeableitung von der Schweißstelle weg nicht die dort zum Schweißen erforderliche Temperatur annimmt, während der leichte Bauteil häufig schon überhitzt wird. Man hat sich bei derartigen Verbindungen daher zumeist so geholfen, Saß man mittels zum Teil sehr erheblicher Werkstoffzerspannung oder mittels spanloser Formung aus dem schweren Bauteil eine der Schweißstelle entsprechende ziemlich lange Verjüngung herausarbeitet. Dadurch wird aber die Wandung des Druckbehälters örtlich geschwächt, so daß die Behälterwandsbärke von vornherein um so stärker ausgelegt werden muß. Daß hierdurch erhebliche Kostenentstehen" liegt auf der Hard.In the case of welds of the type mentioned, which are therefore proportionate thin-walled components directly with those of significantly greater wall thickness are connected, there is always the difficulty that the heavy component because of the significantly greater heat dissipation away from the welding point not there to Welding assumes the required temperature, while the lightweight component often already does becomes overheated. With such connections, one has mostly helped oneself in such a way that One sat by means of sometimes very considerable material machining or by means of non-cutting Formation from the heavy component to a point corresponding to the welding point for quite a long time Rejuvenation works out. As a result, however, the wall of the pressure vessel becomes local weakened, so that the container walls are designed to be stronger from the outset must become. The fact that this results in considerable costs "is on the hard drive.
Man hat daher auch schon vorgeschlagen, den Übergang von der Schweißstelle zu der wärmeaufnehmenden Masse des schweren Bauteiles während des Schweißvorganges auf elektrischem Wege (durch Ohmsche Wärme oder elektroinduktiv) oder mittels besonderer Heizflammen zusätzlich so hoch zu erhitzen, daß die an der Schweißstelle zugeführte Wärme nicht mehr wie bisher in den Bereich der anschließenden starken Wandung abfließen konnte.It has therefore already been suggested that the transition from the weld point to the heat-absorbing mass of the heavy component during the welding process by electrical means (by ohmic heat or electro-inductive) or by means of special heating flames to heat it so high that the Heat supplied to the weld point no longer as before in the area of the subsequent strong wall could flow off.
Um die hierzu erforderlichen verfahrenstechnisch hinderlichen und teilweise kostspieligen Hilfsapparaturen zu vermeiden, wird erfindungsgemäß vorgeschlagen, die die Schweißwärme am raschesten ableitenden Stellen mit Hilfe körniger oder plastischer Gemische von Stoffen zusätzlich zu beheizen, die miteinander unter Wärmeentbindung chemisch reagieren. Dabei kann das als Heizmittel verwendete Stoffgemisch mit oder ohne Bindemittel durch Brikettierung etwa als den jeweiligen Verhältnissen in Form und Größe angepaßte Patrone vorbehandelt und verwendet werden. Diese Patronen können vorteilhaft zugleich als eine Art Stützgerüst für die miteinander zu verschweißenden Zeile dienen.To the procedurally obstructive and necessary for this To avoid sometimes expensive auxiliary equipment, it is proposed according to the invention, the places that dissipate the heat of sweat most quickly with the help of granular or plastic ones Mixtures of substances to be heated in addition to each other with the release of heat react chemically. The mixture of substances used as a heating medium can with or without binding agent by briquetting about as the respective proportions in the form and sized cartridge can be pretreated and used. These cartridges can advantageous at the same time as a kind of support structure for those to be welded together Serve row.
Das Bindemittel kann dabei gleichzeitig zur Beschleunigung oder Verzögerung des chemischen Vorganges sowie insbesondere zur Aufkohlung, Reduktion, Legierung oder sonstigen Beeinflussung des Werkstoffes der zu verbindenden Teile verwendet werden. Die Zündung kann entweder durch die erste Schweißhitze, elektrisch oder in jeder sonst üblichen Weise zum jeweils richtigen Zeitpunkt erfolgen.The binding agent can simultaneously accelerate or decelerate the chemical process and especially for carburization, reduction, alloying or other influencing of the material of the parts to be connected will. The ignition can either be through the first welding heat, electrical or in any other usual way at the correct time.
Bei Anwendung des vom Thermit-Schweißverfahren her bekannten Stoffgemisches besteht schließlich die Möglichkeit, den aufschmelzenden bzw. sich aufschweißenden Zusatzwerkstoff zur Verstärkung der Schweißstelle bzw. des Überganges von derselben zum schweren und/oder leichten Bauteil heranzuziehen.When using the mixture of substances known from the Thermit welding process Finally, there is the possibility of melting or welding Filler material to reinforce the weld or the transition from the same to be used for the heavy and / or light component.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEST5131A DE952294C (en) | 1952-07-26 | 1952-07-26 | Process for additional heating of resistance welds between weak and thick-walled components |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEST5131A DE952294C (en) | 1952-07-26 | 1952-07-26 | Process for additional heating of resistance welds between weak and thick-walled components |
Publications (1)
Publication Number | Publication Date |
---|---|
DE952294C true DE952294C (en) | 1956-11-15 |
Family
ID=7453724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEST5131A Expired DE952294C (en) | 1952-07-26 | 1952-07-26 | Process for additional heating of resistance welds between weak and thick-walled components |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE952294C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1064170B (en) * | 1958-07-21 | 1959-08-27 | Licentia Gmbh | Procedure for initiating the welding process in electro-slag welding |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR392579A (en) * | 1908-07-23 | 1908-11-30 | Laurence Sylvan Lachman | Welding process of objects furnished with points or teeth, such as rakes and forks, and the resulting products |
FR506753A (en) * | 1919-11-29 | 1920-08-30 | Francis Gilbert Gale | Improvements to blank welding using electricity |
DE712963C (en) * | 1938-05-14 | 1941-10-29 | Siemens Schuckertwerke Akt Ges | Electrical flash welding process for joining workpieces whose cross-sectional properties differ in places due to the design or the type of material |
US2276643A (en) * | 1938-08-03 | 1942-03-17 | Westinghouse Electric & Mfg Co | System for preheating and annealing |
GB615790A (en) * | 1946-08-21 | 1949-01-11 | Almin Ltd | Improvements relating to the butt welding of aluminium or magnesium or alloys of these metals |
-
1952
- 1952-07-26 DE DEST5131A patent/DE952294C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR392579A (en) * | 1908-07-23 | 1908-11-30 | Laurence Sylvan Lachman | Welding process of objects furnished with points or teeth, such as rakes and forks, and the resulting products |
FR506753A (en) * | 1919-11-29 | 1920-08-30 | Francis Gilbert Gale | Improvements to blank welding using electricity |
DE712963C (en) * | 1938-05-14 | 1941-10-29 | Siemens Schuckertwerke Akt Ges | Electrical flash welding process for joining workpieces whose cross-sectional properties differ in places due to the design or the type of material |
US2276643A (en) * | 1938-08-03 | 1942-03-17 | Westinghouse Electric & Mfg Co | System for preheating and annealing |
GB615790A (en) * | 1946-08-21 | 1949-01-11 | Almin Ltd | Improvements relating to the butt welding of aluminium or magnesium or alloys of these metals |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1064170B (en) * | 1958-07-21 | 1959-08-27 | Licentia Gmbh | Procedure for initiating the welding process in electro-slag welding |
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