DE939627C - Process for the production of welded hollow bodies, in particular tubes made from tubular sheet metal strips - Google Patents
Process for the production of welded hollow bodies, in particular tubes made from tubular sheet metal stripsInfo
- Publication number
- DE939627C DE939627C DER5316A DER0005316A DE939627C DE 939627 C DE939627 C DE 939627C DE R5316 A DER5316 A DE R5316A DE R0005316 A DER0005316 A DE R0005316A DE 939627 C DE939627 C DE 939627C
- Authority
- DE
- Germany
- Prior art keywords
- sheet metal
- metal strips
- production
- hollow bodies
- oxygen
- 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
Links
Classifications
-
- 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/083—Supply, or operations combined with supply, of strip material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
Verfahren zur Herstellung von geschweißten Hohlkörpern, insbesondere von Rohren aus rohrförmig gebogenen Blechstreifen Bei der Herstellung von Hohlkörpern, insbesondere von Rohren aus rohrförmig gebogenen Blechstreifen, ist es bekannt, die Kanten der im Ofen erhitzten Blechstreifen vor Durchlaufen der Formwalzen bzw. sonstiger Formwerkzeuge durch Anblasen atmosphärischer Luft von Walzsinter oder sonstigen anhaftenden Unreinlichkeiten zu befreien, wobei gleichzeitig die Kanten durch die angeblasene Luft eine sich für die Verschweißung günstig auswirkende erhöhte Erhitzung erfahren. Dabei ist es weiterhin bekannt, zusätzlich zu der atmosphärischen Luft Sauerstoff auf die Kanten der im Ofen erhitzten Blechstreifen zu blasen, und den Sauerstoff zweckmäßig mit der Luft zu vermischen, wobei das Verhältnis von Luft und Sauerstoff zueinander in bezug auf Menge, Druck und Geschwindigkeit sowie Blasweg verschiedenartig regelbar ist.Process for the production of welded hollow bodies, in particular of tubes made of tube-shaped bent sheet metal strips In the manufacture of hollow bodies, in particular of pipes made of tubular bent sheet metal strips, it is known the edges of the sheet metal strips heated in the furnace before they pass through the forming rollers or other molding tools by blowing atmospheric air from rolled sinter or to rid other adhering impurities, at the same time the edges due to the blown air, an increased one which has a beneficial effect on the welding Experience heating. It is still known, in addition to the atmospheric Air to blow oxygen onto the edges of the sheet metal strips heated in the oven, and to mix the oxygen expediently with the air, the ratio of air and oxygen to each other in terms of amount, pressure and velocity and blowing path can be regulated in various ways.
Bekannt sind ferner Anlagen zur Herstellung geschweißter Rohre durch Verformen von Bandstreifen zum Schlitzrohr, dessen Kanten durch elektrische Widerstandserhitzung vorgewärmt und durch die zusätzliche Hitze eines autogenen Schweißbrenners fertiggeschweißt werden. Es handelt sich hier um Rohrschweißanlagen, bei denen der eigentliche Schweißvorgang nur durch die zusäzliche Erhitzung der Randkanten des Schlitzrohres durch einen autogenen Schweißbrenner erfolgt und die elektrische Erwärmung nur zur Vorwärmung und damit zur Beschleunigung des autogenen Schweißvorganges dient.Systems for the production of welded pipes are also known Deformation of tape strips to form a slotted tube, the edges of which are heated by electrical resistance preheated and finish-welded with the additional heat of an oxy-fuel welding torch will. These are pipe welding systems in which the actual welding process only by the additional heating of the edge of the slotted tube by a oxy-fuel welding torch takes place and the electrical heating only serves to preheat and thus to accelerate the autogenous welding process.
Es wurde nun gefunden, daß man nicht nur die im Ofen, erhitzten Streifenkanten durch Anblasen mit Luft oder einem Luft-Sauerstoff-Gemisch reinigen und die Erhitzung der Kanten verbessern kann, sondern in gleich guter Weise auch die Kanten der zum Schlitzrohr geformten. Blechstreifen, die induktiv oder durch elektrischen Widerstand eine Erhitzung erfahren und, rein elektrisch verschweißt werden. Damit wird ein völlig neuer Weg beschritten, den man bisher bei der Induktions- und Widerstandsschweißung nicht gegangen ist und den man auch nicht für zweckmäßig oder erforderlich hielt. Auch erzielt man dadurch bei den. in der erwähnten Weise erhitzten Rohrstreifen im fertigen Rohr eine Güte der Schweißnaht, die weit über der normalen Schweißnahtgüte liegt. Gleichzeitig kann hierdurch die Schweißgeschwindigkeit wesentlich gesteigert werden. Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung von geschweißten Rohren oder sonstigen Hohlkörpern, aus rohrförmig gebogenen Blechstreifen, die oder deren Kanten induktiv oder- durch elektrischen Widerstand erhitzt werden, wobei die Erfindung darin besteht, daß die Kanten der Blechstreifen zum Zwecke der Reinigung von etwaigem anhaftendem- Walzsinter und sonstigen Unreinlichkeiten sowie zur gleichzeitigen Erhöhung der Erhitzung mit atmosphärischer Luft angeblasen werden, deren Sauerstoffgehalt notfalls eine Anreicherung durch den Zusatz von Sauerstoff erfährt.It has now been found that not only the strip edges heated in the oven can be removed Clean by blowing air or an air-oxygen mixture and heating can improve the edges, but also the edges of the to Shaped slotted tube. Sheet metal strips that are inductive or by electrical resistance experience heating and be welded purely electrically. This becomes a Tread a completely new path that was previously used with induction and resistance welding did not go and which was also not considered appropriate or necessary. This also achieves the. tube strips heated in the manner mentioned in the finished pipe a quality of the weld seam that is well above the normal weld seam quality lies. At the same time, this can significantly increase the welding speed will. The invention therefore relates to a method for producing welded Pipes or other hollow bodies, made of tubular bent sheet metal strips that or the edges of which are heated inductively or by electrical resistance, whereby the invention consists in that the edges of the metal strips for cleaning purposes of any adhering roll sinter and other impurities as well as the simultaneous Increase the heating with atmospheric air blown, its oxygen content if necessary, experiences an enrichment through the addition of oxygen.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER5316A DE939627C (en) | 1951-02-03 | 1951-02-03 | Process for the production of welded hollow bodies, in particular tubes made from tubular sheet metal strips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER5316A DE939627C (en) | 1951-02-03 | 1951-02-03 | Process for the production of welded hollow bodies, in particular tubes made from tubular sheet metal strips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE939627C true DE939627C (en) | 1956-03-01 |
Family
ID=7396871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DER5316A Expired DE939627C (en) | 1951-02-03 | 1951-02-03 | Process for the production of welded hollow bodies, in particular tubes made from tubular sheet metal strips |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE939627C (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE340026C (en) * | 1918-12-03 | 1921-08-29 | Douglas Whimster Chisholm | Device for the production of butt-welded tubes by drawing a heated strip through a drawing die provided with a welding roller |
| DE380573C (en) * | 1923-09-14 | Douglas Whimster Chisholm | Device for the production of welded iron or steel pipes | |
| DE459968C (en) * | 1926-02-02 | 1928-05-16 | Birchfield Engineering Company | Pipe welding machine |
| DE472187C (en) * | 1926-02-02 | 1929-03-06 | Birchfield Engineering Company | Pipe welding machine |
| DE517095C (en) * | 1927-07-22 | 1931-04-23 | Hugo Mayweg | Electrical system for welding metal pipes |
| DE554637C (en) * | 1929-05-01 | 1932-07-09 | Hugo Mayweg | Electric welding system for welding metal pipes |
| DE584446C (en) * | 1931-05-19 | 1933-09-20 | Gewerkschaft Kronprinz | Process for gas fusion welding of pipes |
| DE611648C (en) * | 1935-04-02 | Ver Stahlwerke Akt Ges | Device for guiding and blowing on the heated edges of slotted tubes that are to be butt welded together |
-
1951
- 1951-02-03 DE DER5316A patent/DE939627C/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE380573C (en) * | 1923-09-14 | Douglas Whimster Chisholm | Device for the production of welded iron or steel pipes | |
| DE611648C (en) * | 1935-04-02 | Ver Stahlwerke Akt Ges | Device for guiding and blowing on the heated edges of slotted tubes that are to be butt welded together | |
| DE340026C (en) * | 1918-12-03 | 1921-08-29 | Douglas Whimster Chisholm | Device for the production of butt-welded tubes by drawing a heated strip through a drawing die provided with a welding roller |
| DE459968C (en) * | 1926-02-02 | 1928-05-16 | Birchfield Engineering Company | Pipe welding machine |
| DE472187C (en) * | 1926-02-02 | 1929-03-06 | Birchfield Engineering Company | Pipe welding machine |
| DE517095C (en) * | 1927-07-22 | 1931-04-23 | Hugo Mayweg | Electrical system for welding metal pipes |
| DE554637C (en) * | 1929-05-01 | 1932-07-09 | Hugo Mayweg | Electric welding system for welding metal pipes |
| DE584446C (en) * | 1931-05-19 | 1933-09-20 | Gewerkschaft Kronprinz | Process for gas fusion welding of pipes |
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