DE576168C - Process for expanding pipes - Google Patents
Process for expanding pipesInfo
- Publication number
- DE576168C DE576168C DEM97692D DEM0097692D DE576168C DE 576168 C DE576168 C DE 576168C DE M97692 D DEM97692 D DE M97692D DE M0097692 D DEM0097692 D DE M0097692D DE 576168 C DE576168 C DE 576168C
- Authority
- DE
- Germany
- Prior art keywords
- mandrel
- wall thickness
- pipes
- adjustment
- point
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/08—Enlarging tube diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Control Of Metal Rolling (AREA)
Description
Verfahren zum Auf-weiten von Rohren Die Erfindung betrifft eine weitere Ausbildung des Verfahrens zum Aufweiten von Rohren nach Patent 57¢ 626. Nach dem Hauptpatent soll die Stellung des Dornres zwischen den Walzen während des Aufweitens je nach Bedarf geändert werden können, um den Dorn während des Aufweitens wieder für die richtige Wandstärke einzustellen, d. h. seine Stellung zwischen den Walzen zu regeln, falls diese sich beispielsweise durch schwankenden Arbeitsdruck verändert haben sollte. Die Einstellbarkeit des Dornes ist also vorgesehen, um dauernd .die gleiche Wandstärke zu erzielen.Method for expanding pipes The invention relates to another Formation of the method for expanding pipes according to patent 57 [626] The main patent is the position of the mandrel between the rollers during expansion Can be changed as needed to reassemble the mandrel during the flaring set for the correct wall thickness, d. H. its position between the reels to regulate, if this changes, for example, due to fluctuating working pressure should have. The adjustability of the mandrel is therefore provided to permanently .die to achieve the same wall thickness.
Man kann nun aber die Einstellbarkeit auch dazu benutzen, um den Dorn während des Arbeitsvorganges absichtlich zu verstellen, um ein Rohr mit an verschiedenen Stellen verschiedener Wandstärke zu erhalten, also beispielsweise ein Rohr mit streckenweise verdickter oder verdünnter Wand zu erzeugen.But you can now also use the adjustability to adjust the mandrel to be intentionally adjusted during the working process in order to have a pipe with at different To get places of different wall thickness, for example a pipe with stretches to produce thickened or thinned wall.
Wandverstärkungen sind in vielen Fällen notwendig, etwa bei Rohren, die ein verdicktes Ende erhalten müssen, z. B. Bohrrohre.Wall reinforcements are necessary in many cases, for example with pipes, which must have a thickened end, e.g. B. drill pipes.
Die Wandstärke kann nicht nur durch die Dornverstellung erreicht werden, man kann gegebenenfalls, wenn es sich um größere Stärkeunterschiede. handelt, auch noch die Scheibenwalzen verstellen. Zur Verstellung des Dornes zwecks Erzeugung verschiedene Wandstärken können sowohl die in der Haupterfindung beschriebene Vorrichtung als auch hydraulische Einstellvorrichtungen oder andere geeignete Vorrichtungen benutzt werden.The wall thickness can not only be achieved by adjusting the mandrel, you can, if necessary, if there are major differences in strength. acts, too adjust the disc rollers. To adjust the mandrel for the purpose of production Both the device described in the main invention can have different wall thicknesses as well as hydraulic adjustment devices or other suitable devices to be used.
In welcher Weise durch die Dornverstellung verschiedene Wandstärken erzielt werden können, zeigen die Abb. i, 2 und 3 der Zeichnung, die die verschiedenen Dornlagen und ihre Einwirkung auf die Wandstärken zeigen.In what way through the mandrel adjustment different wall thicknesses can be achieved, Figs. i, 2 and 3 of the drawing show the various Show thorn layers and their effect on the wall thickness.
Abb. i gibt die als normal zu bezeichnende Stellung des Dornes zur Walzscheibe x an, bei dieser Stellung würde also die normale Wandstärke des Rohres )v erzeugt werden.Fig. I shows the normal position of the mandrel Rolling disk x on, in this position the normal wall thickness of the pipe would be ) v can be generated.
Die Scheibenstellung und somit auch die Stellung des charakteristischen Punktes a der Scheibe bleibt bei i, 2 und 3 immer dieselbe. Punkt a bleibt also konstant in dem Abstand e! von der Rohrachse.The position of the target and thus also the position of the characteristic Point a of the disk always remains the same for i, 2 and 3. So point a remains constant at the distance e! from the pipe axis.
Die Verstellung des Dornes mit dem Punkt :b nach der Einführungsseite hin ist in Abb. 2 angegeben. Die Entfernung des Punktes b in Abb. i =e, wird um die Größe x verkürzt=e-X= e2. Die Wirkung auf die Rohrwandstärke geht aus der Abbildung hervor; die Wandstärke w1 wird entsprechend der Vorbewegung des Dornes kleiner als die normale Wand w. Die Verstellung des Dornes nach der Aus. führungsseite ist in Abb.3 angegeben. Der Punkt b verschiebt sich um die Größe x nach der Ausführungsseite hin = e 1- x = e3. Auch hier ist die Einwirkung dieser Verstellung auf die Wandstärken ersichtlich. w2 wird entsprechend der Verstellung stärker als w.The adjustment of the mandrel with the point: b after the introduction side is indicated in Fig. 2. The distance of point b in Fig. I = e, is around the size x shortened = e-X = e2. The effect on the pipe wall thickness is shown in the figure forth; the wall thickness w1 becomes smaller than according to the forward movement of the mandrel the normal wall w. The adjustment of the mandrel after the end. management side is given in Figure 3. The point b shifts by the amount x towards the execution side hin = e 1- x = e3. Here, too, is the effect of this adjustment on the wall thickness evident. w2 becomes stronger than w according to the adjustment.
Durch die Verstellung des Dornes hat man es also in der Hand, die Wandstärke auch während des Walzvorganges beliebig zu ändern.By adjusting the mandrel, you have it in your hand, the Wall thickness can also be changed as required during the rolling process.
Man kann nun auch durch Verstellung des Dornes und der Walze, Wandstärkenärnderungen bewirken. Es ist dies in der Abb. q. und 5 angegeben. In der Abb. q. hat der Dorn dieselbe Stellung wie in Abb. 2, er ist also nach der Einführungsseite hin verschoben, wogegen der Punkt der Walze al um die Größe y nach der Rohrachse hilf (also enger) auf die Entfernung = c - y = c2 eingestellt worden ist. Die Wirkung dieser beiderseitigen Verstellung ist ebenfalls eine Verminderung der Wandstärke in w3.You can now also change the wall thickness by adjusting the mandrel and the roller. It is this in Fig. Q. and 5 indicated. In Fig. Q. the mandrel has the same position as in Fig. 2, i.e. it is shifted towards the insertion side, whereas the point of the roller a1 has been adjusted by the size y to the pipe axis (i.e. closer) to the distance = c - y = c2 . The effect of this mutual adjustment is also a reduction in the wall thickness in w3.
In Abb.5 'ist die Dornstellung wie in Abb. 3. Der Punkt ai ist um die Größe y von der Rohrachse entfernt (weitergestellt) worden = c + y = c3. Die Wirkung ist eine Verstärkung der Wandstärke w in w4.In Fig.5 'the mandrel position is as in Fig. 3. The point ai has been removed (moved further) from the pipe axis by the size y = c + y = c3. The effect is an increase in the wall thickness w in w4.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM97692D DE576168C (en) | 1926-12-31 | 1926-12-31 | Process for expanding pipes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM97692D DE576168C (en) | 1926-12-31 | 1926-12-31 | Process for expanding pipes |
GB1743427A GB299741A (en) | 1927-06-30 | 1927-06-30 | Improvements in tube-expanders |
Publications (1)
Publication Number | Publication Date |
---|---|
DE576168C true DE576168C (en) | 1933-05-08 |
Family
ID=10095113
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM92641D Expired DE574626C (en) | 1925-12-30 | 1925-12-30 | Angled rolling device for expanding metal pipes by means of a mandrel |
DEM97692D Expired DE576168C (en) | 1926-12-31 | 1926-12-31 | Process for expanding pipes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM92641D Expired DE574626C (en) | 1925-12-30 | 1925-12-30 | Angled rolling device for expanding metal pipes by means of a mandrel |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE342654A (en) |
DE (2) | DE574626C (en) |
FR (1) | FR636849A (en) |
GB (1) | GB299741A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1115288B (en) * | 1977-05-05 | 1986-02-03 | Innocenti Santeustacchio Spa | SPINDLE DEVICE IN CONTINUOUS LAMINATE WITH SPINDLE RETAINED |
FR2455927A1 (en) * | 1979-05-07 | 1980-12-05 | Vallourec | Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit |
DE4428530C5 (en) * | 1994-08-12 | 2005-11-10 | Kocks Technik Gmbh & Co. Kg | Method and rolling stand for the oblique rolling of pipes |
ITMI20081012A1 (en) | 2008-06-03 | 2009-12-04 | Danieli Off Mecc | LAMINATE OF THE ROTATING EXPANDER TYPE, FOR TUBULAR BODIES, WITH TIP POINTING SYSTEM |
CN109396192B (en) * | 2018-11-20 | 2023-08-29 | 北京京诚瑞信长材工程技术有限公司 | Centering machine |
-
0
- BE BE342654D patent/BE342654A/xx unknown
-
1925
- 1925-12-30 DE DEM92641D patent/DE574626C/en not_active Expired
-
1926
- 1926-12-31 DE DEM97692D patent/DE576168C/en not_active Expired
-
1927
- 1927-06-30 FR FR636849D patent/FR636849A/en not_active Expired
- 1927-06-30 GB GB1743427A patent/GB299741A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR636849A (en) | 1928-04-17 |
DE574626C (en) | 1933-04-18 |
GB299741A (en) | 1928-10-30 |
BE342654A (en) |
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