CH187750A

CH187750A - Brazing process.

Info

Publication number: CH187750A
Authority: CH
Inventors: Nouvelle Zesar S A
Original assignee: Nouvelle Zesar S A
Priority date: 1935-01-28
Filing date: 1936-01-27
Publication date: 1936-11-30

Description

Proef de brasage. Actuellement 1e brasage (soudure au cui- vre) s'effectue en utilisant des baguettes ou des pastilles de laiton, ou au bain. Brazing proef. Currently, brazing (copper soldering) is done using rods or brass pellets, or in a bath.

Ces differents procedes presentent 1'incon- v6nient de donner ä la surface des pieces sou- dees des coulees de cuivre ou de fondant (Bo rax), ce qui necessite un travail supplemen- taire pour leur enlevement; de plus, 1e cuivre ne peut pas atteindre tonte la surface ä son der. These various processes have the disadvantage of giving the surface of the welded parts copper or flux (Borax) flows, which requires additional work for their removal; moreover, the copper cannot reach all the surface at its end.

Le procede suivant 1'invention remedie ä cet inconvenient; ce procAde est caracterise en ce qu'on insere entre les surfaces ä sonder une feuille de brasure et en ce qu'on chauffe les pieces ä sonder ä une temperature appropriee pour obtenir la fusion de la brasure. De pre- ference, la feuille de brasure (laiton ou ana- logue) est prealablement enduite sur ses faces avec du Borax ou matiere similaire. En pro- cedant de cette fagon, la soudure a lieu sur tonte la surface ä sonder et an obtient par consequent une reunion intime de deux pie- ces. D'autre pari, an evite par ce procede une coulee de metal ou de fondant, ce qui sup- prime tont parachevement ulterieur; elle per- met en outre une economie appreciable (50 % ) de brasure et de main-d'oeuvre qualifiee pour 1e brasage proprement dit. The process according to the invention overcomes this drawback; this process is characterized in that a sheet of solder is inserted between the surfaces to be probed and in that the parts to be probed are heated to an appropriate temperature in order to obtain the fusion of the solder. Preferably, the solder sheet (brass or the like) is previously coated on its faces with Borax or similar material. By proceeding in this way, the welding takes place on the entire surface to be probed and an intimate union of two parts is therefore obtained. On the other hand, this process avoids a flow of metal or flux, which eliminates all subsequent finishing; it also allows an appreciable saving (50%) of solder and skilled labor for the actual soldering.

Daus 1e cas particulier de brasage de tubes de velos, motos, etc., raccordes par emboite- ment, an garnit le tube interieur ä son extre- mite dune douille en f euille de brasure (lai- ton, par exemple) qui vieret s'interposer dann 1'emboitement entre 1a face interieure du tube ou raccord exterieur et la face exterieure du tube ou raccord interieur. In the particular case of brazing tubes of bicycles, motorcycles, etc., connected by interlocking, the inner tube is lined at its end with a sleeve made of sheet brazing (brass, for example) which interpose dann 1'emboitement between 1a inner face of the tube or outer fitting and the outer face of the tube or inner fitting.

0n peut egalement enlever une mince cou- che de matiere ä la surface exterieure du tube interieur ou ä 1'int6rieur du tube exte- rieur, de fagon ä menager entre ces deux tu- bes un espace annulaire pour recevoir la feuille de laiton. Dans 1e meme but, an peut aussi diminuer 1e diametre exterieur du tobe interieur ou augmenter 1e diametre interieur du tube exterieur par une autre opäration m6- canique, c'est-à-dire sans affaiblir le tube en question. It is also possible to remove a thin layer of material from the outer surface of the inner tube or from the inside of the outer tube, so as to provide between these two tubes an annular space to receive the brass sheet. For the same purpose, an can also decrease the outer diameter of the inner tube or increase the inner diameter of the outer tube by another mechanical operation, that is to say without weakening the tube in question.

Par le procédé suivant l'invention, on peut, en donnant à la feuille de brasure une surface égale à celle des surfaces à souder, ob tenir un brasage intime dans la masse de la jonction entre les deux pièces. By the method according to the invention, it is possible, by giving the solder sheet a surface equal to that of the surfaces to be soldered, to obtain intimate soldering in the mass of the junction between the two parts.

L'invention n'est, bien entendu, limitée ni à la forme des pièces à souder, ni à la forme des surfaces de soudure, ni à la destination des pièces à souder. The invention is, of course, limited neither to the shape of the parts to be welded, nor to the shape of the welding surfaces, nor to the destination of the parts to be welded.

Claims

Brazing process, characterized in that a sheet of solder is inserted between the surfaces to be soldered and in that the parts to be soldered are heated to a suitable temperature to obtain the fusion of the solder. SUB-CLAIMS 1 Brazing process according to claim, characterized in that the brazing sheet is coated beforehand with an ingredient facilitating its fusion.

2 Brazing method according to claim and sub-claim 1 for tubes of bicycles, motorcycles, etc., connected by interlocking, characterized in that the ex tremity of the inner tube is lined with a sleeve made of sheet of solder which is interposed in the socket between the inner and outer faces in contact with the tube and the outer part.

3 A method according to claim and sub-claim 2, characterized in that the outer diameter of the inner part is modified so as to leave between the tube and the fitting an annular space to receive the solder sheet.

4 A method according to claim and sub-claim 2, characterized in that the inner diameter of the outer part is modified so as to leave between the latter and the inner tube an annular space to receive the solder sheet.

5 A method according to claim, characterized in that brass is used as solder.