DE930720C - Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace - Google Patents

Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace

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Publication number
DE930720C
DE930720C DEK15754A DEK0015754A DE930720C DE 930720 C DE930720 C DE 930720C DE K15754 A DEK15754 A DE K15754A DE K0015754 A DEK0015754 A DE K0015754A DE 930720 C DE930720 C DE 930720C
Authority
DE
Germany
Prior art keywords
gas furnace
protective gas
handlebars
soldering
hollow
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
Application number
DEK15754A
Other languages
German (de)
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.)
Krumm & Co
Original Assignee
Krumm & 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 Krumm & Co filed Critical Krumm & Co
Priority to DEK15754A priority Critical patent/DE930720C/en
Application granted granted Critical
Publication of DE930720C publication Critical patent/DE930720C/en
Expired legal-status Critical Current

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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
    • B23K1/00Soldering, e.g. brazing, or unsoldering
    • B23K1/008Soldering within a furnace

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Description

Verfahren zum Löten von hohlen oder rohrförmigen Bauteilen aus Stahl, insbesondere von Fahrradgabeln und Lenkstangen, im Schutzgasofen Beim Löten von hohlen oder rohrförmnigen Bauteilen aus Stahl, insbesondere von Fahrradgabeln und Lenkstangen im Schutzgasofen tritt regelmäßig eine der und der im Schutzgasofen herrschenden Atmosphäre entsprechende E-rwei@chung der Stahlteile ein. Hierbei hat es sich gezeigt, d@aß besondiers .dünnwandlige rohrförmige Bauteile, wie beispielsweise Fahrradgabeln und Lenkstangen, nach .dem Löten infolge Oberflächenschichtentkohlung eine Verminderung der Festigkeit in Höhe von: ro his 25'% der bei diesen Stahlbauteilen gewünschten und ursprünglichen Festigkeit aufweisen.Process for soldering hollow or tubular components made of steel, especially of bicycle forks and handlebars, in a protective gas furnace when soldering hollow or tubular components made of steel, in particular of bicycle forks and Steering rods in the protective gas furnace regularly occurs one of the and the in the protective gas furnace The steel parts are softened in accordance with the prevailing atmosphere. Here has It has been shown that particularly thin-walled tubular components, such as Bicycle forks and handlebars, after soldering as a result of surface layer decarburization a reduction in strength of: ro to 25% of that of these steel components have the desired and original strength.

Ein bekanntes Verfahren zum Löten von rohrförmni,gen Teilen ans Stähl im Schutzgasofen unter Einführung von Holzkohle in düse Hoihlräurne der zu lötenden Teile hat den Nachteil, daß ihre, naeh dem Erhitzen noch verbleibenden Rückstände das lästige Klingeln oder Rasseln der .bewegten Hohlteile verursachen.A well-known method for soldering tubular parts to steel in a protective gas furnace with the introduction of charcoal in the nozzle of the hollow to be soldered Parts has the disadvantage that their residues still remaining after heating cause the annoying ringing or rattling of the moving hollow parts.

Auch ist es beikamst, die Oberflä,chenschichtentkohlung beim Löten: von hohlen Bauteilen aus Stahl im Schutzgasofen dadurch auszugleichen, daß von außen her dem Schutzgasofen Propangas zugeleitet wird, das eine entsprechende Aufkohlung bewirkt. Dieses Verfahren hat aber den Nachteil, daß der Schutzgasofen und insbesondere aber seine Heizwilderstände in der Atmosphäre dieses Mischgases leiden, so daß eine öftere Auswechslung der beschädigten Teile nötig ist. Auch wird die- Ob@erfläche :dier so behandelten Bauteile rußig und unanisehn@kch.It is also a problem, the surface layer decarburization during soldering: to compensate for hollow steel components in the inert gas furnace that from the outside Propane gas is fed into the protective gas furnace, which causes a corresponding carburization causes. This method has the disadvantage that the protective gas furnace and in particular but his heating wilders suffer in the atmosphere of this mixed gas, so that a Frequent replacement of the damaged parts is necessary. The surface is also : The components treated in this way are sooty and unanisehn @ kch.

Gegenstand der Erfindung ist ein Verfahren zum :Löten von hohlen oder Bauteilen aus Stahl, insbesondere von Fahrradgabeln und Lenksta:nbgen im Schutzgasofen, bei dem vor dem Einbringen der zu lötenden Teile in den Schutzgaiso,fen die Hohlräume mit Schamotte verschlossen werden-Gemäß Ausfühnunigsbeli@spiel wird wie folgt verfahren: Der offene Hohlraum einer nachher zum Zwecd<e des Vemlötens in einer vornehmlich aus Was-serstoff und Säckstoff bestehendjen SchutzgasatmosphäTe, bei einer dem Hartlötenentsprechenden Temperatur zu,gefüh:rten hohlen oder .roihrförmi@gen dünnwandiigen Fahrradgabel oder deren Teiile aus Stahl wird mit einer Mischung vorn Schmierfett oder flüsismgen Koihlenwasserstoffen ausgefüttert. Danach wird die Einführungsöffnung .mit Soihamotte verschIoissem. Der Hohlraum einer solchen aus mehreren Teilen bestehenden FahrradIgabel mißt etwa 5o bd!s 6o ccm. Eine Gabe von etwa io g eines soilchen Aufkohlungsfettes bewirkt während des Zusammenlötens im S,ohutzgaso@fen eine ausreichende Aufkohlung für die Einhaltung der wüns!chens:werten. Festigkeit. Brei eineu bis auf etwa 0,20°/o Kohlenstoff entkohlten Randschicht von o,3omIm Stärke tritt eirneAufkohl4ng biss auf 0,30°/o Köhlensito@ff -innerhalb einer Schicht von o,25 min Stärke bei einer,der.airtigen dünmwand@igen Fahr:radgab:el ein. Die Aufkoihlung i,st im Schl.iffb@ild ioo : i deutl,i h zu erdienn en.The invention relates to a method for: soldering hollow or Components Steel, especially from bicycle forks and handlebars in the protective gas furnace, in which before the parts to be soldered are brought into the protective gas furnace the cavities are closed with fireclay - according to Ausfühnunigsbeli @ game Proceed as follows: The open cavity one afterwards for the purpose of soldering in a protective gas atmosphere consisting primarily of hydrogen and sack, at a temperature appropriate for brazing, hollow or tubular thin-walled bicycle fork or its parts made of steel is front with a mixture Lined with grease or liquid hydrocarbons. After that, the insertion opening .with Soihamotte different. The cavity of one consisting of several parts Bicycle fork measures around 5o bd! S 6o ccm. A dose of about 10 g of a soil carburizing fat causes sufficient carburization during soldering in the S, ohutzgaso @ fen for compliance with the wishes: evaluate. Strength. Pulp to about 0.20 per cent Carbon decarburized surface layer of o, 3om In the starch occurs a carburization bit to 0.30 ° / o Köhlensito @ ff -within a layer of 0.25 min thickness with one of the.airtigen thin wall @ igen Fahr: radgab: el a. The Aufkoihlung i, st in the Schl.iffb@ild ioo: i clear, i h to earn.

Die Aufkohlunig findet in .dem Hohlranmkörper durch allmähliche Verbrennung des teigigen Aufk ohlunigssitoffes unter Luftabischluß, und zwar ohne merkbare Verbrennungsrückstände, statt.The carburization takes place in the hollow body through gradual combustion of the doughy carbonizing agent in the absence of air, without noticeable combustion residues, instead of.

Claims (1)

PATENTANSPRUCH: Verfahren zum Löten von hohlen. oder rohrförmnigen Bauteilen .aus Stahl"insbesondere von Fahrradgabeln und Lenkstangen, im "Schutzgasofen, dadurch gekennzeichnet, .daß vor dem Einbringen. in den Schutzgasofen die Hohlräume mit einer Mischung von Schmierfett oder flüssngen Kohlenwas.serstoffen ausgefüttert und -,durch einten feuerfesten Stopfen, beispielsweise Schamotte, verschlossen werden. .Deutsche Angezogene Patentschrift Druckschriften: Nr. 157 683; schweizerische Patentschrift Nr. io8 533-PATENT CLAIM: Method for soldering hollow. or tubular Components. Made of steel "in particular of bicycle forks and handlebars, in the" inert gas furnace, characterized by .that before the introduction. the cavities in the protective gas furnace lined with a mixture of grease or liquid hydrocarbons and - be closed by a refractory stopper, for example chamotte. .German attracted patent publications: No. 157 683; Swiss patent specification No. IO8 533-
DEK15754A 1952-10-10 1952-10-10 Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace Expired DE930720C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK15754A DE930720C (en) 1952-10-10 1952-10-10 Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK15754A DE930720C (en) 1952-10-10 1952-10-10 Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace

Publications (1)

Publication Number Publication Date
DE930720C true DE930720C (en) 1955-07-21

Family

ID=7214679

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK15754A Expired DE930720C (en) 1952-10-10 1952-10-10 Method for soldering hollow or tubular steel components, in particular bicycle forks and handlebars, in a protective gas furnace

Country Status (1)

Country Link
DE (1) DE930720C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157683C (en) *
CH108533A (en) * 1923-10-15 1925-01-16 Maria Schwab Hanna Method of making a curing agent.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE157683C (en) *
CH108533A (en) * 1923-10-15 1925-01-16 Maria Schwab Hanna Method of making a curing agent.

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