CH103023A - Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of electrical resistance welding. - Google Patents

Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of electrical resistance welding.

Info

Publication number
CH103023A
CH103023A CH103023DA CH103023A CH 103023 A CH103023 A CH 103023A CH 103023D A CH103023D A CH 103023DA CH 103023 A CH103023 A CH 103023A
Authority
CH
Switzerland
Prior art keywords
renewing
boiling
attaching
resistance welding
electrical resistance
Prior art date
Application number
Other languages
German (de)
Inventor
Co Braun-Bruening
Original Assignee
Braun Bruening & Co
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 Braun Bruening & Co filed Critical Braun Bruening & Co
Publication of CH103023A publication Critical patent/CH103023A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/06Resistance welding; Severing by resistance heating using roller electrodes
    • B23K11/065Resistance welding; Severing by resistance heating using roller electrodes for welding curved planar seams
    • B23K11/066Resistance welding; Severing by resistance heating using roller electrodes for welding curved planar seams of tube sections

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Description

  

  



   Verfahren zum Erneuern der beschädigten   Enden von Siede-und Rauchrohren    für Flammrohrkessel durch Ansetzen eines Ersatzrohrstüekes mittelst elektrischer
Widerstandsschweissung.



   Die Erfindung bezieht sich auf ein Ver fahren zum Erneuern der beschädigten En den von Siede-und Rauchrohren für   Flamm-    rohrkessel, zum Beispiel Lokomotivkessel, durch Ansetzen eines Ersatzrohrstückes unter   Nutzbarmachung    der elektrischen Wider  standsschweissung.   



   Das Wesen der Erfindung besteht darin,    da#    die sich überlappenden Stossenden der zu vereinigenden Rohrstiieke dem radialen Druck zweier Rollenelektroden ausgesetzt werden, von denen die eine am äussern Umfang   der Uberlappung,    die andere am innern Umfang der Überlappung sich abwälzt.



   Hierdurch ist bei geringstem Energieverbrauch eine glatte und   wulstlose    Schwei ssung für beliebige Rohrweiten ohne jedwede weitere Nachbearbeitung ermöglicht.



   Die Zeichnung   veranschaulicht Anwen-      dungsbeispiele des Verfahrens.   



   Nach Fig.   1    und 2 der Zeichnung werden die einander zugekehrten Enden der zu vereinigenden Rohrstücke a,   b,    von denen a das von dem beschädigten Stück befreite    Siederohr,    b das Erneuerungsstück bezeich net, bei c, c'entweder abgesetzt (Fig.   1)    oder abgeschrägt (Fig. 2), so    da#    die   ineinander-    geschobenen Enden sich    #berlappen.   



   Die so zum Beispiel nach Fig.   1    vorbereiteten Enden der Rohrstiicke werden sodann gemäss Fig. 3 zwischen zwei   Rollen-    elektroden d, d'einer Widerstandsschweiss maschine gebracht, so daB die eine Rolle d am äussern Umfang der Überlappung, die andere Rolle d'am innern Umfang der    #ber-    lappung sich abwälzt.



   Da man die Überlappung beliebig breit wählen kann, so ist es möglich, auch zwei oder mehrere   Ringnähte    nebeneinander zu legen, wodurch eine beliebig hohe Sicherheit für Dichtheit erreicht werden kann.



   Das Gleiche gilt für die in Fig. 4 ge  zeigte Anschlussart, gem ss welcher    der Ersatzteil b in eine Aufweitung e des Siede. rohres a eingefügt ist, in welchem Falle die Rollenelektrode am äussern Umfang der Aufweitung e, die Rollenelektrode   d'am    innern Umfang des Rohrstückes b sich    abw#lzen.  



  



   Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of an electrical one
Resistance welding.



   The invention relates to a method for renewing the damaged end of the boiling and smoke tubes for flame tube boilers, for example locomotive boilers, by attaching a replacement pipe section using the electrical resistance welding.



   The essence of the invention is that the overlapping butt ends of the pipe sections to be joined are exposed to the radial pressure of two roller electrodes, one of which rolls on the outer circumference of the overlap, the other on the inner circumference of the overlap.



   This enables a smooth and bead-free weld for any pipe width without any further reworking with the lowest possible energy consumption.



   The drawing illustrates application examples of the process.



   According to Fig. 1 and 2 of the drawing, the mutually facing ends of the pipe pieces a, b to be united, of which a is the boiler pipe freed from the damaged piece, b denotes the renewal piece, at c, c 'are either set off (Fig. 1) or beveled (Fig. 2), so that # the nested ends #overlap.



   The ends of the pipe sections prepared in this way according to FIG. 1, for example, are then placed between two roller electrodes d of a resistance welding machine according to FIG. 3, so that one roller d is on the outer circumference of the overlap, the other roller on the inside circumference of the overlap rolls off.



   Since the overlap can be chosen as wide as desired, it is also possible to place two or more ring seams next to one another, whereby an arbitrarily high level of security for tightness can be achieved.



   The same applies to the type of connection shown in FIG. 4, according to which the replacement part b in a widening e of the boil. tube a is inserted, in which case the roller electrode on the outer circumference of the widening e, the roller electrode d roll on the inner circumference of the pipe section b.

 

Claims (1)

PATENTANSPRUCH : Verfahren zum Erneuern der beschädigten Enden von Siede-und Rauchrohren f#r Flammrohrkessel durch Ansetzen eines Er- satzrohrstüekes mittelst elektrischer Wider standsschweissung, dadurch gekennzeichnet, dass die sich überlappenden StoBenden der zu vereinigenden Rohrst#cke durch radialen Druck zweier Rollenelektroden (d, d') ver- schweisst werden, von denen die eine (d) auf dem #u#ern, die andere (#) auf dem innern Umfange der Überlappung sich ab- w#lzt. PATENT CLAIM: Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of electrical resistance welding, characterized in that the overlapping butt ends of the tube pieces to be joined by the radial pressure of two roller electrodes (d, d ' ) are welded, of which one (d) rolls off on the outer, the other (#) on the inner circumference of the overlap.
CH103023D 1923-02-13 1923-02-13 Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of electrical resistance welding. CH103023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH103023T 1923-02-13

Publications (1)

Publication Number Publication Date
CH103023A true CH103023A (en) 1924-01-16

Family

ID=4361717

Family Applications (1)

Application Number Title Priority Date Filing Date
CH103023D CH103023A (en) 1923-02-13 1923-02-13 Process for renewing the damaged ends of boiling and smoke tubes for flame tube boilers by attaching a replacement tube piece by means of electrical resistance welding.

Country Status (1)

Country Link
CH (1) CH103023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269761A1 (en) * 2009-06-30 2011-01-05 Honda Access Corporation Method and apparatus for manufacturing an exhaust pipe assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269761A1 (en) * 2009-06-30 2011-01-05 Honda Access Corporation Method and apparatus for manufacturing an exhaust pipe assembly
US8610023B2 (en) 2009-06-30 2013-12-17 Honda Motor Co., Ltd Method and apparatus for manufacturing for fixing a mounting ring to an exhaust pipe assembly

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