DE1552013A1 - Process for the production of pipe walls or pipe panels - Google Patents

Process for the production of pipe walls or pipe panels

Info

Publication number
DE1552013A1
DE1552013A1 DE19661552013 DE1552013A DE1552013A1 DE 1552013 A1 DE1552013 A1 DE 1552013A1 DE 19661552013 DE19661552013 DE 19661552013 DE 1552013 A DE1552013 A DE 1552013A DE 1552013 A1 DE1552013 A1 DE 1552013A1
Authority
DE
Germany
Prior art keywords
welding
pipe
flanges
production
panels
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.)
Pending
Application number
DE19661552013
Other languages
German (de)
Inventor
Tadeusz Meczynski
Hans Waengsjoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KJELLBERG ESAB GmbH
Original Assignee
KJELLBERG ESAB GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KJELLBERG ESAB GmbH filed Critical KJELLBERG ESAB GmbH
Publication of DE1552013A1 publication Critical patent/DE1552013A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/101—Tubes having fins or ribs
    • F22B37/102—Walls built-up from finned tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/225—Making finned or ribbed tubes by fixing strip or like material to tubes longitudinally-ribbed tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • 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
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/004—Welding of a small piece to a great or broad piece
    • B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates
    • 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
    • B23K11/08—Seam welding not restricted to one of the preceding subgroups
    • B23K11/087—Seam welding not restricted to one of the preceding subgroups for rectilinear seams
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B23K9/0052—Welding of pipe panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Description

Verziehungen der Rohrwände mit sich bringen können. Can bring distortions of the pipe walls with it.

Das erfindungegemäße Verfahren zeichnet sich demgegenüber dadurch aus, daß zuerst auf jedes einzelne Rohr Längsflansche durch Widerstandaschweißen aufgeschweißt werdeng und daß danach die Flansche benachbarter Rohre miteinander durch Widerstandsschweißen verbunden werden. Dieses Verfahren weist mehrere Vorteile gegenüber den bekannten Verfahren auf. Der Schweißvorgang geht schneller vor sich und die Wärmeeinwirkung auf den Rohrwerkstoff ist wesentlich geringer alsbei der Lichtbogenschweißung. Auch die Schweißspannungen, sind wesentlich geringer und können sich im übrigen, da sie symmetrisch wirken, nient in Verwerfüngen der Rohrwand auswirken.In contrast, the method according to the invention is distinguished by this from that first on each individual pipe longitudinal flanges by resistance welding are welded and that then the flanges of adjacent pipes with one another be connected by resistance welding. This method has several advantages compared to the known methods. The welding process is faster and the effect of heat on the pipe material is much less than that of the Arc welding. The welding tensions are also much lower and can In addition, since they act symmetrically, they do not have the effect of distorting the pipe wall.

Das Aufschweißen der Längsflansche auf die Rohre wird vorzugsweise schrittweise unter Verwendung des Buckelschweißverfahrens durchgeführt. Es hat sich nämlich erwiesen, daß die sonst unter der Einwirkung des Schweißdrucks auf den durch die Strömwärme erweichten Rohtwerkstoff eintretende Verformung des Rohrquerschnitts sich in dieser Weise vermeiden oder in zuläs_ sigen Grenzen halten läßt.Welding the longitudinal flanges onto the pipes is preferred performed gradually using the projection welding process. It has namely proved that the otherwise under the action of the welding pressure on the through the heat of the flow softened the raw material and the deformation of the pipe cross-section can be avoided in this way or kept within permissible limits.

Für das Verschweißen der Plansche benachbarter Rohre wird vorzugsweise dap Foliennahtschweißverfahren verwendet. Es ist darunter ein Verfahren zu verstehen, bei welchem die zu ver- Stahlbändern etwa 0,2 mm) bedeckt wird, wonach das Verschweißen--der Naht mittels eines Elektrodenpaares erfolgt, wobei die eine Elektrode oder beide Elektroden als Rollenelektroden ausgeführt sind.Foil seam welding is preferably used to weld the puddles of adjacent pipes. It is to be understood as a process in which the Steel strips about 0.2 mm) is covered, after which the welding - the seam is carried out by means of a pair of electrodes, one or both electrodes being designed as roller electrodes.

Der Erfindungzgegenstand wird nachstehend an Hand eines Aus--.# führungebeispieles unter Bezug auf die Zeichnung näher erläutertt Die Fig. 1 zeigt im Querschnittein Rohr während des Aufschweißens der Längsflansche. Die Fig. 2 zeigt in-ähnlicher Weise zwei benachbarte Rohre während des Verschweißens der Flansche.The subject matter of the invention is explained in more detail below using an exemplary embodiment with reference to the drawing. Fig. 1 shows in cross section a pipe during the welding of the longitudinal flanges. FIG. 2 shows in a similar manner two adjacent tubes during the welding of the flanges.

Das Rohr 15 (Fig. 1), welches einen Teil einer Rohrwa#ci oder Rohrtafel bilden sollg wird zuerst mit zwei Längsflanachen oder Stegen 11,12 verschweißt. Die Flansche oder Stege 11,12 sind fÜr das unter Verwendung des Buckelacaweißverfahrens durchzufünrende Aufschweißen.so vorzubereiten, daß ihre dem Rohre zugewandten Kante im #;uerschnitt etwas auswärts gewölbt-oder abgeschrägt wird, damit das Rohr und der Plansch sien anfänglich nur.in einer scamalen, mittleren Kontaktzone berühren. Das Schweißen wird vorzugsweise schrittweise durchgeführt, wobei der Abstand' der aufeinanderfolgenden Schweißpunkte genügend klein sein Xuß, um eine ununterbrochene Schweißnaht zu ergeben. Dieser Abstand wird am besten experimentell ermittelt,- nur als Beispiel sei erwähnt% daß beim Aufschweißen von F lanschen, deren Dicke 5 mm betrug, auf Rohre, deren Wanddicke ebenfalls 5 mm betrug, der Abstand der Schweißpunkte bis zu 60 mm'betragen konnte. Die-Schweißelektroden 13,14 sind als Rollen angedeutet; es ist aber möglich und unter Umständen sogar vorteilhaft, statt Rollen Punktelektroden zu verwenden.The tube 15 (FIG. 1), which is intended to form part of a tube wall or tube sheet, is first welded to two longitudinal flanges or webs 11, 12. The flanges or webs 11, 12 are to be prepared for welding on using the humpback welding process so that their edge facing the pipe is curved or beveled slightly outward in the cross section, so that the pipe and the puddle are initially only in one scamalen, touch the middle contact zone. The welding is preferably carried out step-by-step, the distance between the successive welding points being small enough to result in an uninterrupted weld seam. This distance is best determined experimentally - it should only be mentioned as an example that when welding flanges with a thickness of 5 mm to tubes with a wall thickness of 5 mm, the distance between the welding points could be up to 60 mm. The welding electrodes 13, 14 are indicated as roles; however, it is possible and in some cases even advantageous to use point electrodes instead of rollers.

Fig. 2 veranschaulicht das Verbinden von zwei im voraus mit aufgeoahweißten Flanschen versehenen Rohren. Die Flansche, werden stumpf aneinandergelegt, und die Nahtzone wird mit einem dünnen Stahlband 16 bzw. 17 bedeckt, dessen Dicke 0,2 mm beträgt. Bei dem-mittels des Elektrodenrollenpaares 18,19 durchgeführten SchweißVorgang werden die Stahlbänder 16, 17 mit den Flanschen verschweißt; es erfolgt gleichzeitig auch eine Verschmelzung wenigstens der den Stahlbändern benachbarten Teile der stumpf aneinanderliegenden Kantenflächen der Flansche.Fig. 2 illustrates the joining of two pipes pre-welded with flanges. The flanges are butted together and the seam zone is covered with a thin steel strip 16 or 17 , the thickness of which is 0.2 mm. In the welding process carried out by means of the pair of electrode rollers 18 , 19, the steel strips 16, 17 are welded to the flanges; At the same time, at least the parts of the butt-lying edge surfaces of the flanges adjacent to the steel strips are also merged.

Es ist möglich, die Stahlbänder vo r Beginn des Schweißens Über die ganze Länge der Naht anzubringen; praktisch zieht man aber vor, das einer Bandspule entnommene Band kurz voroder in dem Schweiß punkte fortschreitend auf die Flansche abzulegen.It is possible to use the steel straps before starting welding to apply the entire length of the seam; in practice, however, one prefers that of a tape reel removed tape just before or in the welding points progressively on the flanges to discard.

Die Dicke der Flansche ist vorzugsweise nicht wesentlich kleiner als die Wandstärke der zu verschweißenden Rohre zu wählen. Auch die (re#diale) Breite der Flansche sollte nicht kleiner als die Wandstärke'der Roure sein.The thickness of the flanges is preferably not significantly less than to choose the wall thickness of the pipes to be welded. Also the (re # diale) width the flange should not be smaller than the wall thickness of the Roure.

In Bezug aüf den Rohrwerkstoff und die Rohrabmessungen gelten für das erfindungsgemäße Verfahren*keine besonderen Besehränkungen. Die untenstehenden Angaben mögen lediglich als ein Beispiel dienen-, Rohrwerkstoff: Kesselstahl-mit-der folgenden Zusammensetzung:- 0 0915 - 0918 % Cr 2,5 % Mo. 1,5 % Rest Eisen mit Üblichen Gehalten-an Si und Mn und mit oder ohne übliche Verun- reinigungen. Durchmesser.- -1 bis-411 (25 bis WO mm) Wandstärke: 2,5 bis 12 mm; Bei d ein Aufschweißen der Flansche auf die Rohre läßt sich eine Schweißgeschwindigkeit von 1,5 bis 3-m/min. erreichen. Die bei dem Foliennahtschweißen der Flansche erreichbare Schweißgeschwindigkeit hängt von der Dicke der Flansche ab.With regard to the pipe material and the pipe dimensions, no special restrictions apply to the method * according to the invention. The information below may only serve as an example, pipe material: Boiler steel-with-the following composition: - 0 0915 - 0918% Cr 2.5% Mon 1.5% Remainder iron with usual contents of Si and Mn and with or without the usual cleanings. Diameter. -1 to -411 (25 to WO mm) Wall thickness: 2.5 to 12 mm; When d is a welding of the flanges on the pipes, a welding speed of 1.5 can be up to 3 m / min. reach. The welding speed that can be achieved with foil seam welding of the flanges depends on the thickness of the flanges.

Im allgemeinen ist mit einer erreichbaren Schweißgeschwindigkeit von mindestens 1,5 m/min. zu rechnen. Unter günstigen Bedingungen lassen sich Schweißgeschwindigkeiten bis zu 3 oder 4 m/min. erreichen.In general, an achievable welding speed of at least 1.5 m / min. to be expected. Under favorable conditions, welding speeds of up to 3 or 4 m / min can be achieved. reach.

Claims (2)

Patentanspräche: Verfahren zum Herstellen von Rohrwänden oder Rohrtafeln für Dampfkessel, Närmeaustauscher u.dgl., bestehend aus'paralle 1 zueinander verlaufenden, durch aufgeschweißte Längsflanscne miteinander verbundenen Rohren, dadurch gekennzeichnet, daß zuerst auf jedes einzelne Rohr Längsflansene durch Widerstands-_ schweißen aufgeschweißt-werden, und daß danacu die Ylansche benachbarter Rohre miteinander durch diderstandsschweißen verbunden werden. Patent claims: A process for the production of pipe walls or pipe panels for steam boilers, heat exchangers and the like, consisting of 1 parallel pipes connected to one another by welded longitudinal flanges, characterized in that longitudinal flanges are first welded onto each individual pipe by resistance welding. and that then the ylanes of adjacent pipes are connected to one another by resistance welding. 2. Verfahren nach Anspruch 1, dadurch gekennzeierinet, daß das Aufschweißen der Längsflansche auf die Ronre scnrittweise unter Verwendung des Buckelschweißverfahrens durchgeführt wird. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Flansche benachbarter Rohre miteinander dureil Foliennahtschweißen verbunden werden.,2. The method according to claim 1, characterized gekennzeierinet that the welding of the longitudinal flanges on the Ronre is carried out step by step using the projection welding process. 3. The method according to claim 1 or 2, characterized in that the flanges of adjacent pipes are connected to one another by film seam welding.
DE19661552013 1965-06-14 1966-06-08 Process for the production of pipe walls or pipe panels Pending DE1552013A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE777765 1965-06-14

Publications (1)

Publication Number Publication Date
DE1552013A1 true DE1552013A1 (en) 1970-11-26

Family

ID=20272275

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661552013 Pending DE1552013A1 (en) 1965-06-14 1966-06-08 Process for the production of pipe walls or pipe panels

Country Status (2)

Country Link
DE (1) DE1552013A1 (en)
GB (1) GB1136736A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555722B1 (en) * 1983-11-25 1988-07-29 Stein Industrie DEVICE FOR SUSPENDING A BEAM OF HORIZONTAL TUBES IN A VERTICAL PLANE, AND METHOD FOR MANUFACTURING THIS DEVICE
CN105149884B (en) * 2015-09-22 2017-06-06 东方电气集团东方锅炉股份有限公司 A kind of processing method of long radius face of cylinder tube panel
CN110030545B (en) * 2019-03-27 2023-11-28 华电电力科学研究院有限公司 Corrosion-resistant and wear-resistant membrane type water-cooled wall structure

Also Published As

Publication number Publication date
GB1136736A (en) 1968-12-18

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