EP1265719A2 - Utilisation de tubes en zinc-titane selon en 988 et procede de pliage permettant de produire des tubes coudes - Google Patents
Utilisation de tubes en zinc-titane selon en 988 et procede de pliage permettant de produire des tubes coudesInfo
- Publication number
- EP1265719A2 EP1265719A2 EP01925482A EP01925482A EP1265719A2 EP 1265719 A2 EP1265719 A2 EP 1265719A2 EP 01925482 A EP01925482 A EP 01925482A EP 01925482 A EP01925482 A EP 01925482A EP 1265719 A2 EP1265719 A2 EP 1265719A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- pipe
- titanium zinc
- pipes
- weld seam
- 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.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 41
- YJVLWFXZVBOFRZ-UHFFFAOYSA-N titanium zinc Chemical compound [Ti].[Zn] YJVLWFXZVBOFRZ-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000013067 intermediate product Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 230000007704 transition Effects 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
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
- B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
- B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member
Definitions
- sheet steel has a ratio B of the ratio of width to thickness change of about 1.7.
- the ratio B is used to characterize the flowability of a material, the ratio B resulting from a change in width to thickness in the tensile test.
- the invention further relates to a method of bending of titanium zinc to EN 988 existing pipes with a nominal diameter between 90 and 150 mm for pipe bends with a bend angle between 30 ° and 90 °, which are butt-welded by a plane extending parallel to the tube axis weld " and which are intended in particular for downpipes according to EN 612, with a pipe bending device as is known per se for the bending of steel pipes, the titanium zinc according to EN 988 being anisotropic in a sense that the ratio of change in width to thickness is compared with steel, is relatively low and the existing weld seam of the output tube during bending lies in the area of the non-elongated layer.
- the initial thickness of the downpipes according to EN 612 is from nominal diameters between 50 and 150 mm between 0.65 and 1.2 mm.
- a bending radius of 175 mm with a metal thickness of 0.7 mm to 1 mm can be assumed as typical values for a pipe bend with a bending angle of 60 °.
- a range from 0.6 to 1.5 mm forms the range of the metal thickness for thin-walled sheet metal tube bends.
- Methods are known to the person skilled in the art for forming such steel sheet tubes into a tube bend (cf. WD FRANZ: The cold bending of tubes; Springer-Verlag, 1961).
- Preferred is a tube bending process in which the tube is bent using a mandrel. The forming can be facilitated by an additional internal pressure and the friction between mandrel and tube can be reduced by means of lubricant. This process, which is known per se, can be used with particular advantage on pipes made of titanium zinc in accordance with EN 988.
- a titanium zinc pipe with a nominal diameter of 100 mm which has a butt welded longitudinal seam, becomes a continuous sequence of each other hanging pipe pieces bent.
- the tube wall thickness is 1.0 mm.
- the pipe is clamped at one end with a clamping device.
- the clamping device has an inner core 1 and outer jaws 2. It is only clamped over a length of approximately 50 mm.
- a piston rod 3 is guided through the inner core of the clamping device and can be pushed as well as pulled and to which an internal mandrel 4 is attached.
- the piston rod with the internal mandrel is located inside the tube.
- the pipe to be bent is also clamped at the other end.
- a spreading segment is introduced and mechanically spread for this purpose. From the outside, the tube is clamped between the clamping jaw and the bending mold 7 by closing a clamping jaw 6.
- the combination of clamping jaw and bending shape rotates about the axis of the bending shaft 8 and thus bends the tube.
- the spreading segment prevents the tube from collapsing.
- the bending mandrel 4 in the interior of the tube consists of several, preferably 2 to 6, members. It is designed to prevent the tube from collapsing or folding during bending.
- a smoothing shoe 9 which has the task of closing the tangential transition from the tube to the bending roller 7 and preventing wrinkling.
- a sliding segment 10 supports the reflow of the material during the bending on the outside of the tube. With the aid of a hydraulic cylinder 11, the bending mandrel 7 can be advanced or retarded via the piston rod 3.
- the clamping jaw 6 and the sliding segment are retracted radially.
- the bending shape swings back into the starting position.
- the bending mandrel is also pulled back into its starting position via the hydraulic cylinder 11.
- the tube is rotated axially through 180 ° via the rear clamping 1.2.
- the bending process is repeated, so that another pipe section is created.
- the expansion segment is only required for the first bending process of each tube.
- the process is repeated until the exit pipe is completely processed.
- the repeatedly bent pipe is then cut into suitable pipe pieces.
- the length of the pipe can also be chosen so that only a single pipe bend is created.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK01925482T DK1265719T3 (da) | 2000-03-23 | 2001-03-16 | Anvendelse af rör og titanzink ifölge EN 988 og böjningsfremgangsmåde til fremstilling af rörbukninger |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10014519 | 2000-03-23 | ||
| DE10014519A DE10014519A1 (de) | 2000-03-23 | 2000-03-23 | Verwendung von Rohren aus Titanzink nach EN 988 und Biegeverfahren zur Herstellung von Rohrbögen |
| PCT/EP2001/003060 WO2001070426A2 (fr) | 2000-03-23 | 2001-03-16 | Utilisation de tubes en zinc-titane selon en 988 et procede de pliage permettant de produire des tubes coudes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1265719A2 true EP1265719A2 (fr) | 2002-12-18 |
| EP1265719B1 EP1265719B1 (fr) | 2005-01-05 |
Family
ID=7636105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01925482A Expired - Lifetime EP1265719B1 (fr) | 2000-03-23 | 2001-03-16 | Utilisation de tubes en zinc-titane selon en 988 et procede de pliage permettant de produire des tubes coudes |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1265719B1 (fr) |
| AT (1) | ATE286440T1 (fr) |
| AU (1) | AU2001252217A1 (fr) |
| DE (2) | DE10014519A1 (fr) |
| ES (1) | ES2234831T3 (fr) |
| WO (1) | WO2001070426A2 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10156475A1 (de) * | 2001-11-16 | 2003-06-05 | Rheinzink Gmbh | Verfahren zur Herstellung von dunklen Schutzschichten auf Flacherzeugnissen aus Titanzink |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2957229A (en) * | 1954-12-23 | 1960-10-25 | Allan W Beatty | Method of fabricating curved fittings |
| DE3709784A1 (de) * | 1987-03-25 | 1988-10-06 | Rheinzink Gmbh | Verfahren und vorrichtung zur herstellung von duennwandigen rohren |
| DE19633423A1 (de) * | 1996-08-20 | 1998-02-26 | Rheinzink Gmbh | Verfahren zur Herstellung von dünnwandigen Rohren |
| US6009737A (en) * | 1997-07-17 | 2000-01-04 | Arvin Industries, Inc. | Tube bender |
-
2000
- 2000-03-23 DE DE10014519A patent/DE10014519A1/de not_active Withdrawn
-
2001
- 2001-03-16 ES ES01925482T patent/ES2234831T3/es not_active Expired - Lifetime
- 2001-03-16 AT AT01925482T patent/ATE286440T1/de active
- 2001-03-16 WO PCT/EP2001/003060 patent/WO2001070426A2/fr not_active Ceased
- 2001-03-16 EP EP01925482A patent/EP1265719B1/fr not_active Expired - Lifetime
- 2001-03-16 DE DE50105029T patent/DE50105029D1/de not_active Expired - Lifetime
- 2001-03-16 AU AU2001252217A patent/AU2001252217A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0170426A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001252217A1 (en) | 2001-10-03 |
| ES2234831T3 (es) | 2005-07-01 |
| ATE286440T1 (de) | 2005-01-15 |
| DE50105029D1 (de) | 2005-02-10 |
| EP1265719B1 (fr) | 2005-01-05 |
| DE10014519A1 (de) | 2001-10-11 |
| WO2001070426A3 (fr) | 2002-03-14 |
| WO2001070426A2 (fr) | 2001-09-27 |
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