DE263547C - - Google Patents
Info
- Publication number
- DE263547C DE263547C DENDAT263547D DE263547DA DE263547C DE 263547 C DE263547 C DE 263547C DE NDAT263547 D DENDAT263547 D DE NDAT263547D DE 263547D A DE263547D A DE 263547DA DE 263547 C DE263547 C DE 263547C
- Authority
- DE
- Germany
- Prior art keywords
- caps
- cap
- tube
- tip
- compressed
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
- B21C37/283—Making U-pieces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Es ist bekannt, bei Überhitzerrohren u. dgl. die Rückkehrbogen aus einem Rohr in der Weise herzustellen, daß dasselbe von einer Seite bis zur gegenüberliegenden Rohrwand, wie in der Zeichnung in Fig. ι ersichtlich, eingeschnitten und dann um die undurchschnittene Rohrwand c bis zur gewünschten Parallelstellung, wie in Fig. 2 dargestellt, umgebogen wird. Auf die so entstehende, inIt is known, in superheater tubes and the like Way to make the same thing from one side to the opposite pipe wall, As can be seen in the drawing in Fig. ι, incised and then around the uncut Pipe wall c up to the desired parallel position, as shown in Fig. 2, bent will. The resulting in
ίο Fig. 3 in Draufsicht dargestellte Schnittfläche g wird dann eine entsprechend geformte Kappe b aufgeschweißt.ίο Fig. 3 cut surface g, shown in plan view, a correspondingly shaped cap b is then welded on.
Die Herstellung dieser Kappen erfolgte bisher in der Weise, daß für jede Kappe ein kurzes Rohrstück über einem Dorn an einem Ende zusammengepreßt bzw. -gestaucht und die Spitze dann verschweißt wurde.The manufacture of these caps has so far been carried out in such a way that one for each cap short piece of pipe compressed or compressed at one end over a mandrel and the tip was then welded.
Dieses Verfahren ist nicht nur umständlich, sondern es besteht vor allem die Gefahr, daß die Kappe an der Spitze, wo das Rohr am meisten zusammengestaucht wird, nur dünnwandig ist und unter Umständen, namentlich, wenn diese Teile der Uberhitzerrohre im Feuerzug liegen, leicht undicht wird.This process is not only cumbersome, but above all there is a risk that the cap at the tip, where the tube is most compressed, only thin-walled is and under certain circumstances, especially if these parts of the superheater tubes in the Fire draft lies, leaks easily.
Vorliegende Erfindung betrifft nun ein Verfahren zur Herstellung von Rückkehrbogenkappen, welches nicht nur den eben erwähnten Nachteil beseitigt, sondern auch gleichzeitig den wichtigen Vorteil erzielt, daß bei jedem Arbeitsgang zwei solcher Kappen erzeugt werden.The present invention now relates to a method of making return bow caps, which not only eliminates the disadvantage just mentioned, but also at the same time achieved the important advantage that two such caps are produced in each operation.
Dies neue Verfahren besteht darin, daß ein Stück Rohr, wie aus Fig. 4 ersichtlich, in der Mitte eingeschnürt wird, so daß zwei kappenartige Teile entstehen. Wichtig ist dabei, daß das Einschnüren dieses Rohres auf einer beliebigen langen Strecke x-y (Fig. 4) geschehen kann, so daß beim hierauf folgenden Abschneiden, Schweißen und Pressen jedes Teiles über einem Dorn die Kappe an der den Heizgasen am meisten ausgesetzten Spitze, wie aus Fig. 5 ersichtlich, zugespitzt und verdickt ist. Selbstverständlich müssen die Kappen entsprechend der aus Fig. 3 ersichtlichen Rohrumbiegestelle entsprechend flachgedrückt werden, was zweckmäßig erfolgt, solange die Kappen noch, wie aus Fig. 4 ersichtlich, zusammenhängen, so daß auch dieser Arbeitsgang für je zwei Kappen gemeinsam durchgeführt werden kann.This new method consists in that a piece of tube, as shown in FIG. 4, is constricted in the middle, so that two cap-like parts are formed. It is important that the constriction of this tube can be done on any long distance xy (Fig. 4), so that when this is followed by cutting, welding and pressing each part over a mandrel, the cap on the tip most exposed to the hot gases, such as can be seen from Fig. 5, is pointed and thickened. Of course, the caps must be correspondingly flattened according to the tube bending point shown in FIG. 3, which is expediently carried out as long as the caps are still connected, as can be seen from FIG. 4, so that this operation can also be carried out together for two caps.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE263547C true DE263547C (en) |
Family
ID=520932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT263547D Active DE263547C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE263547C (en) |
-
0
- DE DENDAT263547D patent/DE263547C/de active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2657269A1 (en) | PROCESS FOR INCREASING THE TENSILE STRENGTH OF STEEL PIPES | |
DE263547C (en) | ||
DE2311279A1 (en) | Electrically heated pipe coupling sleeve - having latent tensile stress to cause shrinkage when heated | |
DE120314C (en) | ||
DE2927135B1 (en) | Method and device for producing bevel gears | |
DE99405C (en) | ||
DE532919C (en) | Manufacture of pipes with inwardly reinforced ends by upsetting | |
WO2012035086A1 (en) | Pressure measuring device having an improved arrangement of a measuring spring | |
DE276537C (en) | ||
DE102004028078B4 (en) | Method and apparatus for forming a collar portion on a workpiece | |
DE247579C (en) | ||
EP0070406A2 (en) | Method of producing a pipework duct having at least one elbow between two straight lengths of pipe | |
DE899444C (en) | Telescopic front wheel fork with sliding tubes connected by a bridge to form a sliding bracket and a method for producing this sliding bracket | |
DE1261102B (en) | Method and device for the manufacture of pipe bends with a cross section that tapers evenly from one end to the other | |
DE510568C (en) | Process for the production of fork heads | |
DE274600C (en) | ||
DE2758138C2 (en) | Process for the production of precision steel tubes from individually cut sheet metal | |
DE928929C (en) | Process for the production of tubular hollow bodies, in particular hollow piston slide rods for steam locomotives | |
DE938906C (en) | Device for the production of a pipe fork | |
CH369091A (en) | Process for the production of elbows | |
DE611648C (en) | Device for guiding and blowing on the heated edges of slotted tubes that are to be butt welded together | |
EP0072402B1 (en) | Method of and device for the elimination or reduction of the edge mismatch in joining pipes together end-to-end by welding | |
DE2646741C2 (en) | Method for producing a hermetically sealed ball head end on a tubular workpiece | |
DE750730C (en) | Method of making flat rings | |
DE295294C (en) |