SE467567B

SE467567B - Method for making weld connectors for weld joints between pipes made from various metallic materials

Info

Publication number: SE467567B
Application number: SE9003940A
Authority: SE
Inventors: I Persson
Original assignee: Exploweld Ab
Priority date: 1990-12-10
Filing date: 1990-12-10
Publication date: 1992-08-10
Also published as: SE9003940D0; SE9003940L

Abstract

Method for making weld connectors for weld joints between pipes made from various metallic materials. The invention is characterized in that in a first stage a compound pipe 1 is made from two pipes 2,3 of the respective material by means of explosion welding, in that in a later stage a section of the outer pipe 3 of the compound pipe is taken away at the one end of the compound pipe and in that a section of the inner pipe 2 of the compound pipe is taken away at the other end of the compound pipe and in that the compound pipe is given a uniform internal diameter by means of the explosion forming. <IMAGE>

Description

467 567 10 20 25 30 35 2 - figur 2 visar röret enligt figur 1 efter ett andra steg - figur 3 visar röret enligt figur 2 efter ett tredje steg - figur 4 visar röret enligt figur 3 efter ett fjärde steg. 467 567 10 20 25 30 35 2 - figure 2 shows the pipe according to figure 1 after a second step - figure 3 shows the pipe according to figure 2 after a third step - figure 4 shows the pipe according to figure 3 after a fourth step.

Elnligt uppfinningen tillverkas svetsrnellarastycken för svetsförband mellan rör av olika metalliska material, genom att i ett första steg tillverka ett koxrlpouncirör av två rör av respektive material medelst explosions- svetsning, och genom att i senare steg borttaga ett parti av kompoundrörets yttre rör vid kompoundrörets ena ände och borttaga ett parti av kompounci- rörets inre rör vid kompoundrörets andra ände och genom att ge kompound- röret en uniform inre diameter medelst explosionsfonmirxg.According to the invention, welding weld pieces for welding joints between pipes of different metallic materials are manufactured, in a first step manufacturing a coaxial pipe of two pipes of respective materials by explosion welding, and in later steps removing a portion of the outer pipe of the composite pipe at one end of the composite pipe and removing a portion of the inner tube of the compound tube at the other end of the compound tube and by giving the compound tube a uniform inner diameter by means of an explosion mold.

Nedan beskrivas medelst hänvisning till figurerna 1 - 4 ett föredraget sätt enligt uppfinningen att tillverka ett svetsxnellarmstycke.Hereinafter, by reference to Figures 1-4, a preferred method according to the invention for manufacturing a welding accelerator piece is described.

I ett första steg, illustrerat i figur 1, tllverkas ett kompoundrör l av två rör 2,3 av respdctive material medelst explosionssvetsning på konventionellt sätt, d.v.s. exempelvis med en invändigt placerad sprängladdning och ett utarzpåliggaxrie mothåll. Härvid uppnås det i figur 1 visade kompoundröret.In a first step, illustrated in Figure 1, a compound pipe 1 is made of two pipes 2,3 of respective materials by explosion welding in a conventional manner, i.e. for example, with an internally placed explosive charge and a surface-mounted axial bracket. In this case, the compound pipe shown in Figure 1 is achieved.

Konpoundröret kan tillverkas i längre längder än den önskade längden hos svetsrnellalßtyckerxa. Härvid uppkapas konpoundröret till önskade längder.The convex pipe can be manufactured in longer lengths than the desired length of the welding tool. In this case, the concave pipe is cut to the desired lengths.

I ett andra steg, illustrerat i figur 2, borttages ett parti av det inre röret 2 medelst svarvning. Härefter föreligger ett rör som delvis är ett konpomxdrör och som har olika inre diametrar.In a second step, illustrated in Figure 2, a portion of the inner tube 2 is removed by turning. Next, there is a tube which is partly a composite tube and which has different inner diameters.

I ett tredje steg, vilket illustreras i figur 3, ges det sålunda bear- betade kompoundröret en uniform inre diameter medelst explosionsfonming på konventionellt sätt, genom en utanpåliggande sprängladdning och ett inre mothåll 4. Pilarna illustrerar rikmirzg.In a third step, as illustrated in Figure 3, the compound pipe thus processed is given a uniform inner diameter by means of explosion molding in a conventional manner, by an external explosive charge and an inner abutment 4. The arrows illustrate rikmirzg.

I ett fjärde steg, vilket illustreras i figur 4, borttages en del av det yttre röret 3 av kompoundröret 1 vid ändpartiet 5 av kornpouradröret :medelst svarvning. Figur 4 visar det färdiga svetsmellanstycket.In a fourth step, as illustrated in Figure 4, a part of the outer tube 3 of the compound tube 1 at the end portion 5 of the barley purad tube is removed: by turning. Figure 4 shows the finished welding adapter.

Efter dessa steg föreligger således ett rör med konstant inre diameter vars respektive ändar endast består av ett material. 9/ 10 15 20 25 30 35 467 567 Alternativt kan istället för de ovan beslorivna stegen en del av kompound- rörets yttre rör först borttagas vid kompoundrörets ena ände, varefter en del av kolupolnﬁrörets inre rör borttages vid kompoundrörets andra ände, varefter slutligen röret ges en uniform inre diameter medelst explosione- fornming.After these steps there is thus a tube with a constant inner diameter whose respective ends consist of only one material. 9/10 15 20 25 30 35 467 567 Alternatively, instead of the steps described above, a part of the outer tube of the compound tube can first be removed at one end of the compound tube, after which a part of the inner tube of the columnar tube is removed at the other end of the compound tube, after which the tube is finally given a uniform inner diameter by means of an explosion molding.

Enligt en föredragen utföringsform utgöres det ena metallmaterialet av rostfritt stål och det andra metalllnaterialet av någon av metallerna aluminium eller titan.According to a preferred embodiment, one metal material is stainless steel and the other metal material is one of the metals aluminum or titanium.

Enligt en annan föredragen utföringsform utgöres det ena nletallnxaterialet _ av koppar och det andra lrnetalhnaterialet av någon av metallerna aluminium eller titan.According to another preferred embodiment, one of the metal materials is copper and the other metal material is one of the metals aluminum or titanium.

Föreliggande uppfinning anvisar således en metod för tillverkning av svetsmellanstycken, där dessa tillverkas från explosionssvetsade koxupourxi- rör, genom svarvning och fonming.The present invention thus provides a method of making weld spacers, where these are made from explosion-welded coxupourx pipes, by turning and molding.

Till skillnad från den ovan beskrivna kända metoden, där tillverkningen sker från plåt, erfordras endast minimala vid explosionssvets- ningen. Därmed kan smälter een kevireter i fegen undvikas. m nellanelmcn av silver är ej Vidare blir fogplanet orienterat i rörete längdrmmiiig, i ställer för vinkelrätt mer detta, vilket ur hållfasthetssynpunkt är fördelaktigt.Unlike the known method described above, where the production takes place from sheet metal, only minimal requirements are required for explosion welding. Thus, melting a kevireter in the cow can be avoided. m nellanelmcn of silver is not Furthermore, the joint plane is oriented in the tube longitudinally, instead of perpendicular more this, which from a strength point of view is advantageous.

Svetsmellaristyoken tillverkade enl. metoden kan vidare tillverkas utan svårighet i större längder än vid tillverkning ur plåt. Härvid kan all värmepåverkan vid insvetsning till anslutande rör elimineras.The welding smelteryoken manufactured according to the method can furthermore be manufactured without difficulty in greater lengths than in manufacture from sheet metal. In this case, all heat exposure during welding to connecting pipes can be eliminated.

En annan fördel som virmes, är att den explosionssvetsade fogens samman- bindningsyta kan göras Inycket stor, utan att svetslnellanstyclcets ytter- diameter därför behöver ökas.Another advantage that is felt is that the connecting surface of the explosion-welded joint can be made slightly larger, without the outer diameter of the welded piece having to be increased.

Föreliggande uppfinning skall inte anses begränsad till ovan angivna utföringsformer utan kan varieras inom dess av bifogade patentkrav angivna ram.The present invention is not to be construed as limited to the above embodiments, but may be varied within the scope of the appended claims.

Claims

467 567 10 15 20 25 Paten ﬂ crav.

Method of making welding spacers for welded joints between pipes of non-metallic material, characterized in that in the first stage a compound pipe (1) is made of two pipes (2,3) of the respective material by explosion welding, in that in a later stage a portion of the compour pipe outer tube (3) is removed at one end of the compound tube and that a portion of the inner tube (2) of the compound tube (2) is removed at the other end of the compound tube and that the coxound tube is given a uniform inner diameter by means of an explosion molding.

2. A method, characterized in that in the first stage a coupling pipe (1) is made of two pipes (2,3) of the respective material by means of explosion molding, in that in a second stage a portion of the inner pipe (2) of the compound pipe is removed by turning and by that in a third step the machined coxupow tube is given a uniform inner diameter by means of an explosion mold and that in a fourth step a part of the coxpound tube outer tube (3) is removed at the end portion (5) of the compound tube by heating.

3. The metal material is stainless steel and the other metal material is aluminum or titanium.

4. Claims 2 or 2, characterized in that the net metal material is copper and the other: the net metal material is one of the metals aluminine or titanium.