DE633683C - Process for the production of fusion-welded hollow bodies - Google Patents
Process for the production of fusion-welded hollow bodiesInfo
- Publication number
- DE633683C DE633683C DEM122681D DEM0122681D DE633683C DE 633683 C DE633683 C DE 633683C DE M122681 D DEM122681 D DE M122681D DE M0122681 D DEM0122681 D DE M0122681D DE 633683 C DE633683 C DE 633683C
- Authority
- DE
- Germany
- Prior art keywords
- fusion
- hollow bodies
- production
- welded hollow
- welding
- 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
- B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
- B21C37/0811—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off removing or treating the weld bead
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Verfahren zur Herstellung schmelzgeschweißter Hohlkörper Die Erfindung betrifft ein Verfahren zur Herstellung dickwandiger schmelzgeschweißter Hohlkörper, wie z. B. Kesseltrommeln.Process for the manufacture of fusion-welded hollow bodies. The invention relates to a process for the production of thick-walled fusion-welded hollow bodies, such as B. boiler drums.
Die auf normalen Drei- oder Vierwalzenbiegemaschinen gebogenen Bleche (Fig. i ) sind für die Schmelzschweißung nicht ohne weiteres brauchbar, da die Seitenkanten der Bleche je nach der Entfernung der Unterwalzen voneinander und von der Mitte der Öberwalze auf eine gewisse Breite mehr oder weniger von dem gewünschten Radius abweichen bzw. gerade bleiben. Derartige Bleche erfordern eine schwierige und kostspielige Nacharbeit, da die geraden bzw. ungenau gebogenen Blechstreifen abgetrennt, die Kanten des Bleches in vorgebogenem Zustand gehobelt, zusammengebogen und wieder gerichtet werden müssen (Fig. z).The sheets bent on normal three- or four-roll bending machines (Fig. I) are not readily usable for fusion welding because the side edges of the sheets depending on the distance of the lower rolls from each other and from the center the top roller to a certain width more or less of the desired radius deviate or stay straight. Such sheets require a difficult and expensive one Rework, as the straight or imprecisely bent sheet metal strips were cut off Edges of the sheet in the pre-bent state planed, bent together and again must be directed (Fig. z).
Außerdem muß bei allen Druckgefäßen, insbesondere bei denen, die im Betriebe höheren Temperaturen ausgesetzt sind, wie Kesseltrommeln o. dgl., auf die Entfernung der überstehenden Schweißraupe geachtet werden, um einmal Wärmestauungen zu vermeiden und ,außerdem einen gleichmäßigen Spannungsfluß bei Belastung der Druckkörper zu erreichen. Bei wechselnder Belastung der Gefäße ist eine glatte Naht besonders wichtig wegen ihrer gegenüber einer mehr oder weniger rauhen Wulstnaht erhöhten Schwingungsfestigkeit.In addition, all pressure vessels, especially those that are in Operations are exposed to higher temperatures, such as boiler drums o. The like. On the Care should be taken to remove the protruding weld bead to prevent heat build-up to avoid and, moreover, an even flow of tension when the pressure hulls are loaded to reach. A smooth seam is particularly important when the blood vessels are subjected to changing loads important because of their increased compared to a more or less rough bead seam Vibration resistance.
Es ist weiter bereits vorgeschlagen, die vom Biegen her gerade gebliebenen Blechkanten (Fig.3) mittels Schmelzschweißung miteinander zu verbinden (Fig.4), dann wieder zu erwärmen und den Hohlkörper an der Stelle der Schweißnaht zu runden.It has also already been proposed that those that have remained straight from the point of view of bending To connect sheet metal edges (Fig. 3) to one another by means of fusion welding (Fig. 4), then to heat again and to round the hollow body at the point of the weld seam.
Erfindungsgemäß soll nun das Runden durch Schmieden oder Pressen (Fig.5) erfolgen, wobei gleichzeitig, wie es auch sonst bei Schweißnähten bekannt ist, die vorstehenden Schweißraupen auf Materialstärke gebracht werden. Hierfür soll eine Wassergasrollenschweißmaschine zur Erwärmung der Schweißnaht und zum Pressen Verwendung finden. Das Pressen kann absatzweise oder fortlaufend erfolgen. Die Folge dieser Bearbeitung ist eine Vergütung der Naht, da durch die Erwärmung und den nachfolgenden Schmiedeprozeß einmal die vorhandenen Schweißspannungen ausgeglichen und weiterhin die durch die Schrumpfspannungen erzeugten Unrundungen beseitigt werden. Diese würden sonst im Betriebe zu unerwünschten und gefährlichen zusätzlichen Biegungsspannungen in der Naht Anlaß geben.According to the invention, the rounding should now be done by forging or pressing (Fig. 5) take place, at the same time, as is otherwise known for welds, the protruding weld beads are brought to material thickness. For this purpose, a Water gas roller welding machine for heating the weld seam and for pressing use Find. The pressing can be done intermittently or continuously. The consequence of this Processing is a compensation of the seam, because of the heating and the subsequent Forging process once the existing welding stresses are balanced and continue the out-of-rounding produced by the shrinkage stresses can be eliminated. These would otherwise undesirable and dangerous additional bending stresses in the company give cause in the seam.
Neben der erzielten Verbesserung der Güte der Schweißnaht bietet das Verfahren erhebliche fabrikationstechnische und wirtschaftliche Vorteile, die zusammengefaßt darin bestehen i. Eine Materialzugabe, die je nach der Länge und Wandstärke des Körpers bzw. je nach Art der verwendeten Biegewalze bis zu 25% des Blechmantel betragen kann, wird infolge des Wegfalls von Materialverlusten nicht mehr notwendig.In addition to the improvement in the quality of the weld seam, this offers Process significant manufacturing and economic advantages, which are summarized consist i. A material allowance that depends on the length and wall thickness of the Body or, depending on the type of bending roller used, be up to 25% of the sheet metal jacket is no longer necessary due to the elimination of material losses.
z. Ein trotz der Blechzugabe noch erforderliches Nachrichten des ungeschweißten Zylinders fällt fort.z. A news of the unwelded one, which is still necessary despite the sheet metal allowance Cylinder falls away.
3. Für die Entfernung der überstehenden Schweißraupen, die sonst mit spanabhebenden Werkzeugen oder durch Schleifen an der Außen- und Innenseite der Naht zu erfolgen hatte, sind keinerlei Mehrkosten aufzuwenden.3. For the removal of the protruding weld beads, which are otherwise with cutting tools or by grinding on the outside and inside of the There are no additional costs to be incurred.
Diese Ersparnisse an Material- und Lohnkosten überwiegen bei weitem die Aufwendungen für das Anwärmen und Schmieden der Naht.These savings in material and labor costs far outweigh these the expenses for heating and forging the seam.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM122681D DE633683C (en) | Process for the production of fusion-welded hollow bodies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM122681D DE633683C (en) | Process for the production of fusion-welded hollow bodies |
Publications (1)
Publication Number | Publication Date |
---|---|
DE633683C true DE633683C (en) | 1936-08-04 |
Family
ID=7330113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM122681D Expired DE633683C (en) | Process for the production of fusion-welded hollow bodies |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE633683C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982000607A1 (en) * | 1980-08-18 | 1982-03-04 | Ivanoff O | Method and apparatus for manufacturing a metal pipe |
WO1997026096A1 (en) * | 1996-01-17 | 1997-07-24 | Mauser-Werke Gmbh | Process and device for manufacturing a metal container with a longitudinal weld |
US6530254B2 (en) | 1999-05-21 | 2003-03-11 | Mauser-Werke Gmbh & Co. Kg | Rolling machine |
-
0
- DE DEM122681D patent/DE633683C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982000607A1 (en) * | 1980-08-18 | 1982-03-04 | Ivanoff O | Method and apparatus for manufacturing a metal pipe |
US4491004A (en) * | 1980-08-18 | 1985-01-01 | Ivanoff Osmo O | Apparatus for manufacturing a metal pipe |
WO1997026096A1 (en) * | 1996-01-17 | 1997-07-24 | Mauser-Werke Gmbh | Process and device for manufacturing a metal container with a longitudinal weld |
US6530254B2 (en) | 1999-05-21 | 2003-03-11 | Mauser-Werke Gmbh & Co. Kg | Rolling machine |
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