EP1088605B1 - Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres - Google Patents
Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres Download PDFInfo
- Publication number
- EP1088605B1 EP1088605B1 EP00120973A EP00120973A EP1088605B1 EP 1088605 B1 EP1088605 B1 EP 1088605B1 EP 00120973 A EP00120973 A EP 00120973A EP 00120973 A EP00120973 A EP 00120973A EP 1088605 B1 EP1088605 B1 EP 1088605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- corrugating
- axis
- mandrel
- fixtures
- 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 - Lifetime
Links
Images
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
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/205—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with annular guides
-
- 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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/06—Corrugating tubes transversely, e.g. helically annularly
Definitions
- the invention relates to the field of production of corrugated metal pipes.
- corrugated metal pipes on the market at present has a spiral corrugation obtained continuously by means of corrugating fixtures also having a spiral shape.
- metal pipes particularly in stainless or tempered steel, provided with a ring-type or parallel ridge-type corrugation, in that it has been found that they have greater flexibility and are therefore more desirable.
- corrugated pipes with parallel-ridge corrugation on the market at present are generally obtained by means of a discontinuous process which uses dies on a press, or by means of a process of hydroforming, again discontinuous, which provides for introduction of water into sections of pipe wherein the water, under pressure, presses the pipe against an outer die.
- the object of the present invention is to simplify and speed up the production of metal corrugated pipes with parallel ridges.
- Another object is to form corrugated metal pipes with parallel ridges that have constant properties along their entire length.
- a further object is to make an apparatus for production of corrugated metal tubes with parallel ridges that can operate completely automatically.
- a pipe to be corrugated (fed inside a corrugating assembly at a first speed or input speed and extracted from the corrugating assembly at a second speed, or output speed, lower than the input speed) is subjected to the combined action of at least three idle, offset, spiral corrugating toothings, with a greater diameter than the pipe, rotationally driven around the axis of the pipe; the pitch of the thread of the corrugating toothings and the feed speed of the pipe being correlated with each other.
- the new process includes the further step of adjusting the distance of the rotation axes of the corrugating toothings from the axis of the pipe.
- the corrugating apparatus comprises at least three corrugating fixtures with an inner corrugating thread, having an inner diameter greater than the diameter of the pipe on which they must operate, and disposed one after the other along the axis of travel of the pipe, offset with respect to said axis and preferably adjustable in position at right angles to said axis. It further comprises a mandrel containing said fixtures and rotatable around an axis coinciding with the axis of the pipe, means for rotating said mandrel around the tube axis and means for adjusting the distance of the rotation axes of said fixtures from the mandrel axis. It then comprises an upstream draft device and a downstream draft device to determine an input pipe speed and an output pipe speed.
- the new procedure and the new apparatus make it possible to obtain corrugated metal pipes with parallel ridges in a continuous process and with substantially constant characteristics along the length of the pipe. Furthermore, they allow the height of the corrugation ridge to be regulated.
- a production line for corrugated pipes comprises a first upstream drive or draft device, referenced 2, a second downstream drive or draft device, referenced 4, and a corrugating assembly referenced 10.
- the upstream and downstream drive devices 2, 4 are of a per se known type and generally comprise two collaborating tracks, 2a, 2b and 4a, 4b, respectively, of rubber or similar material; the facing portions of the tracks of each device move at the same speed to convey a pipe in the direction of the arrow F.
- a smooth incoming pipe T generally comes from an upstream forming device, not shown, which can be, for example, a longitudinal welder, per se known.
- the smooth pipe T is gripped between the tracks 2a, 2b of the drive device 2 and fed at a first speed, or input speed, through a guide bushing 9 to the corrugating assembly 10.
- a tubular member 22 having its axis coincident with a is mounted within sleeve 20.
- the member 22 is carried on the sleeve 20 by means of bearings 23, and is thus free in rotation with respect to the sleeve.
- the seat 14 carries integrally a mandrel denoted as a whole by 24, which will be further described below, which carries two corrugating devices denoted respectively by 26 and 28.
- the corrugating devices are carried by the mandrel on respective slides 30, 32 and precisely the device 26 is fixed on the slide 30 and 28 on the slide 32.
- the device 26 carries a corrugating fixture 34 by means of a bearing 36; the corrugating fixture has an inner spiral shaped corrugating surface 37 with its axis b parallel and at a distance with respect to the axis a .
- the corrugating device 28 carries a corrugating fixture 38 by means of a bearing 40 and the corrugating fixture 38 is similar to 34, that is to say it has a spiral-shaped inner surface 39, and it has a longitudinal axis c spaced from axis a and axis b ; in particular in this case it is coplanar with said two axes and on the opposite side of a with respect to b .
- Each corrugating fixture 34 and 38 is thus idle around its own axis a or c and is rotationally driven around axis a .
- the mandrel further carries a guide bushing 42, generally made of bronze or a low-friction material, to guide an outgoing corrugated pipe.
- the smooth incoming pipe T has its own axis aligned and coinciding with the axis a .
- Rotation around the axis a is imparted to the sleeve 20, the mandrel 24 and the connected parts from a motor 44, through a shaft 46, a double pulley 48, belts 50 and a further pulley 52 integral with the sleeve.
- the slides 30, 32 are preferably radially adjustable in position on the mandrel 24, that is to say, it is possible to adjust the distance between the axes b , c and the axis a by a certain amount, according to the diameter of the pipe T to be corrugated.
- a position adjustment device is shown in Figure 4 and comprises a sleeve 54, applied to one end of the tubular member 22 by means of a threaded coupling 55.
- the sleeve 54 has a conical tongue 56 that is received in a corresponding groove, respectively 57 in the slide 30 and 58 in the slide 32.
- the grooves 57 and 58 extend only for an arc of the conical surface.
- a rotation imparted to the member 22 in any way causes extension or retraction respectively of the sleeve 54.
- Extension (towards the left in Figure 3) of the sleeve 54 reduces the distance between the axes b and c (which remain symmetrical with respect to the axis a ); movement of the sleeve 54 towards the right in Figure 3 increases the distance between the axes b and c (symmetrically with respect to the axis a ).
- the fixtures 34 and 38 (axes b and c ) are adjusted according to the diameter of the pipe T to be corrugated.
- the speeds of the upstream draft device and the downstream draft device are then adjusted according to the pitch of the spirals of the fixtures 34 and 38, generally on an tentative basis.
- the sleeve and the connected parts are then rotated around axis a from the motor 44.
- the smooth pipe T is introduced continuously, at the end on the left in the figures, advances in the direction of the arrow F and exits as a corrugated pipe TC.
- the spirals of the corrugating fixtures 34 and 38 cause a deformation of the side wall of the pipe turning all around it. It is seen that in practice each fixture provides a force contrasting the force exerted by the other fixture at all times.
- the correlation between the feeding speed of the pipe, the rotational speed of the spirals of the fixtures and the pitch of the spirals thereof determines the corrugation with parallel ridges of the pipe TC.
- the pitch of the parallel ridges of the pipe TC can be increased or decreased by increasing or decreasing the speed of the downstream draft device 4.
- references 31 are the axes of fixing means for fixing the device 26 on the slide 30 and references 33 are the axes of fixing means for fixing the corrugating device 28 on the slide 32.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Catalysts (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Claims (10)
- Verfahren zur Herstellung eines Metallwellrohrs (TC) mit parallelen Rippen, für welches eine erste Geschwindigkeit (oder Einlaufgeschwindigkeit) des Rohrs (T), das gewellt werden soll, und eine zweite Geschwindigkeit (oder Auslaufgeschwindigkeit) des Wellrohrs (TC), die niedriger als die Eingangsgeschwindigkeit ist, festgesetzt sind,
dadurch gekennzeichnet, dass die Rohrfläche den kontrastierenden Einwirkungen von mindestens drei Spiralprofilen - oder Arbeitsflächen - unterliegt, die in einem Dorn (24) angeordnet sind, welcher um die Achse (a) des Rohrs (T) drehangetrieben wird, aber um zugehörige Achsen, die verschieden gestaltet und in Bezug auf die Achse (a) des Rohrs (T) versetzt sind, antriebsfrei ist,
und dass der Achsenabstand der Spiralprofile von der Rotationsachse (a) des Doms (24) justiert wird über ein Justiermittel mit:- einer Gleitfläche für jedes Wellenbefestigungsorgan, wobei jede Gleitfläche eine schräge Rille aufweist;- einem Justierelement (54), das entlang der Rotationsachse (a) des Doms (24) axial übertragbar ist und mit schrägen Federn (56) in Gleiteingriff mit den schrägen Rillen versehen ist. - Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Auslaufgeschwindigkeit des Wellrohrs (TC) justiert wird, um den Abstand der Wellen mit parallelen Rippen des hergestellten Rohrs (TC) anzupassen.
- Vorrichtung zur Baudferbigung von Metallwellrohren (TC) mit parallelen Rippen, umfassend:- einen Dorn (24), der um eine Rotationsachse (a) rotierbar ist, wobei der Dorn (24) freie Wellenbefestigungen aufnimmt mit zugehörigen, verschiedenartigen Achsen parallel und abstandsgleich zu einer Rotationsachse (a) des Doms (24),- Mittel für die Rotationsbevcregung des Dorns (24) um die Rotationsachse (a) und- Antriebsmittel (2, 4), die dem Dorn (24) vor- und nachgeschaltet sind, um den Vorschub des Rohrs (T, TC) zu bewirken,dadurch gekennzeichnet, dass sie ferner umfassen:- mindestens drei Wellenbefestigungen, welche jeweils mit einer inneren Spiralwellenfläche ausgerüstet sind, deren Durchmesser größer als der Durchmesser des zu bearbeitenden Rohrs (T) ist, wobei jede Wellenbefestigung antriebsfrei um ihre eigene Achse befestigt ist, sowie- Mittel zum Justieren des Abstands der Achsen der Wellenbefestigungen von der Rotationsachse (a) des Dorns, wobei die Justiermittel umfassen:- eine Gleitfläche für jede Wellenbefestigung, wobei jede Gleitfläche eine schräge Rille aufweist;- ein Justierelement (54), das entlang der Rotationsachse (a) des Doms (24) axial übertragbar ist und mit schrägen Federn (56) in Gleiteingriff mit den schrägen Rillen ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Antriebsmittel (2, 4) für das Rohr (T, TC) eine vorgeschaltete Antriebs- oder Konzepteinrichtung (2) und eine nachgeschaltete Antriebs- oder Konzepteinrichtung (4) aufweisen, welche an die einzelnen Vorschubgeschwindigkeiten anpassbar sind.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Wellenbefestigungen in angrenzenden Stellungen entlang einer Laufrichtung des Rohrs (T) angebracht sind.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Wellenbefestigungen auf dem Dorn (24) austauschbar sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein rohrförmiges Element (22) umfässt, das mit seiner Achse, die identisch mit oder parallel zur Achse (a) des Dorns (24) verläuft und in das Justierelement (54) eingreift, um dessen Vorschub zu verursachen.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass mindestens drei Wellenbefestigungen mit ihren Achsen in Bezug auf die Rotationsachse (a) des Doms (24) versetzt angeordnet sind und winklig abstandsgleich um die Achse (a).
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass sie eine Führungsbuchse (9) zur Führung des Rohrs (T) vor den Wellenbefestigungen und eine Führungsbuchse (42) zur Führung des Rohres (TC) nach den Wellenbefestigungen aufweist.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die nachgeschaltete Führungsbuchse (42) mit dem Dorn (20) rotiert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1999MI002053A IT1313765B1 (it) | 1999-10-01 | 1999-10-01 | Procedimento e apparecchiatura per produzione in continuo di tubometallico corrugato a onde parallele. |
ITMI992053 | 1999-10-01 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1088605A2 EP1088605A2 (de) | 2001-04-04 |
EP1088605A3 EP1088605A3 (de) | 2002-01-16 |
EP1088605B1 true EP1088605B1 (de) | 2006-05-03 |
Family
ID=11383707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00120973A Expired - Lifetime EP1088605B1 (de) | 1999-10-01 | 2000-09-27 | Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1088605B1 (de) |
AT (1) | ATE324950T1 (de) |
DE (1) | DE60027658T2 (de) |
ES (1) | ES2264412T3 (de) |
IT (1) | IT1313765B1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10146807A1 (de) * | 2001-09-22 | 2003-04-10 | Nexans | Verfahren zur Herstellung längsnahtgeschweisster schraubenlinienförmig gewellter Metallrohre |
CN109226332B (zh) * | 2018-11-15 | 2024-04-12 | 宁波市狮山管业有限公司 | 一体式波纹管连续密波成型设备 |
CN112091027B (zh) * | 2020-09-04 | 2021-04-16 | 航天晨光股份有限公司 | 一种定尺寸长度的无缝薄壁波纹管滚压成型机 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3572074A (en) * | 1968-01-09 | 1971-03-23 | Pirelli General Cable Works | Corrugating methods and apparatus |
US3486357A (en) * | 1968-06-21 | 1969-12-30 | Universal Metal Hose Co | Annular corrugating apparatus for tubing |
DE2060024A1 (de) * | 1970-12-05 | 1972-06-08 | Kabel Metallwerke Ghh | Verfahren zur Herstellung ringfoermig gewellter Metallrohre |
US3780556A (en) * | 1971-09-27 | 1973-12-25 | Andrew Corp | Tube corrugating apparatus and method |
DE2400842C2 (de) * | 1974-01-09 | 1982-08-19 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Verfahren und Vorrichtung zur Herstellung flexibler Metallrohre |
YU42981A (en) * | 1980-08-02 | 1983-09-30 | Kabel Metallwerke Ghh | Device for transforming even tubes to wave-shaped tubes |
DE4137275A1 (de) * | 1991-11-13 | 1993-05-19 | Kabelmetal Electro Gmbh | Verfahren zur kontinuierlichen herstellung schraubenlinien- oder ringfoermig gewellter metallrohre |
-
1999
- 1999-10-01 IT IT1999MI002053A patent/IT1313765B1/it active
-
2000
- 2000-09-27 AT AT00120973T patent/ATE324950T1/de not_active IP Right Cessation
- 2000-09-27 EP EP00120973A patent/EP1088605B1/de not_active Expired - Lifetime
- 2000-09-27 DE DE60027658T patent/DE60027658T2/de not_active Expired - Lifetime
- 2000-09-27 ES ES00120973T patent/ES2264412T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1088605A3 (de) | 2002-01-16 |
ITMI992053A1 (it) | 2001-04-01 |
DE60027658D1 (de) | 2006-06-08 |
EP1088605A2 (de) | 2001-04-04 |
IT1313765B1 (it) | 2002-09-17 |
ATE324950T1 (de) | 2006-06-15 |
ES2264412T3 (es) | 2007-01-01 |
DE60027658T2 (de) | 2007-04-05 |
ITMI992053A0 (it) | 1999-10-01 |
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