EP2931450B1 - Spulenschichtkopf - Google Patents

Spulenschichtkopf Download PDF

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Publication number
EP2931450B1
EP2931450B1 EP13820979.6A EP13820979A EP2931450B1 EP 2931450 B1 EP2931450 B1 EP 2931450B1 EP 13820979 A EP13820979 A EP 13820979A EP 2931450 B1 EP2931450 B1 EP 2931450B1
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EP
European Patent Office
Prior art keywords
grooves
laying head
stage
head according
intermediate stage
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
Application number
EP13820979.6A
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English (en)
French (fr)
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EP2931450A1 (de
Inventor
Andrea De Luca
Francesco ADAMI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danieli and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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Publication of EP2931450A1 publication Critical patent/EP2931450A1/de
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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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B21C47/10—Winding-up or coiling by means of a moving guide
    • B21C47/14—Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum
    • B21C47/143—Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum the guide being a tube

Definitions

  • the present invention relates to a coil laying head for continuous and substantially rectilinear semi-finished products coming from the mill or other similar source, such as wire rods, round rods or others.
  • a commonly used solution to obtain coils from metal wires of different diameter is to use a coil laying head comprising a rotor in which a coil forming and laminate conveyor tube is mounted.
  • the rotor is mounted cantilevered on a stator body by means of two rolling bearings or supports, and can thus rotate around its own axis.
  • the stator body is in turn rigidly constrained to a base.
  • the rotor rotates about its own axis generally at high angular speeds, which can exceed 2000 RPM.
  • the rotation of the rotor is generated by an external motor connected by a bevel gear driving system.
  • Types of coil laying heads are also known where the rotors include internally the motor and coaxially mount the motor stator.
  • the laminate during the rotation of the coil laying head, is bent by the tube to form a sequence of coils having a predefined diameter, which are deposited by dropping on a roller discharge belt to be cooled and conveyed to the collecting and stacking well.
  • the coil forming tube Upon the passage of the metal wire, the coil forming tube is subjected to strong mechanical and thermal stresses, shocks and tangential thrusts which determine particularly strong wear conditions inside the tube which limit the lifespan thereof. Moreover, the wear undergone by the tube is often not uniform over its entire length, tending to concentrate in certain areas of greater stress rather than others. The replacement of the entire tube when at least a part thereof is worn therefore implies a non-optimal use of those parts that are not yet worn.
  • document EP-A-779 115 describes a coil laying head which in place of the coil laying tube uses a spiral-shaped conveying groove formed between two bell-shaped rotating members, one internal and one external, integral to each other and secured to the mandrel by a flange.
  • the head is provided with four or more grooves which can be used alternately for conveying and guiding the laminate within the coil laying head.
  • the two bells are generally made of lightweight materials, such as light alloys or composite materials, which allow achieving high rotation speeds. To extend the useful lifespan, the grooves are coated with wear-resistant material.
  • the object of the present invention is to provide a coil laying head provided with a rotor which allows reducing the number of changes required in the grooved bell due to wear of the grooves, and the waste of material for making said grooved bell, thereby reducing the utilization cost of the object.
  • a further object of the present invention is to provide a coil laying head provided with a rotor which allows using each part of the groove where the laminate passes, suitable to the grade of wear to which it is subjected.
  • Another object of the present invention is to provide a coil laying head provided with a rotor which allows using the entire outer surface of said grooved bell.
  • a further object of the present invention is to provide a coil laying head which requires an easy maintenance of the rotor, the latter consisting of relatively manageable and not too heavy parts.
  • the present invention therefore aims to achieve the above objects by implementing a coil laying head, defining a longitudinal axis, which according to claim 1 comprises a fixed supporting structure; a rotor, adapted to rotate about said longitudinal axis and rotatably fixed to said supporting structure; wherein the rotor comprises a bell-shaped member, which is expanded outwards with respect to said longitudinal axis and has an outer surface thereof provided with at least one spiral-shaped groove, for guiding the metal product; wherein feeding means for feeding the metal product to said at least one groove are provided; characterized in that said bell-shaped member consists of at least three stages mutually arranged in sequence along the longitudinal axis so that the outer surfaces of said stages, provided with spiral-shaped grooves, jointly define the outer surface of the bell-shaped member and can be arranged, by turning at least one stage about said longitudinal axis, in at least one respectively relative angular position so as to define at least one continuous spiral-shaped path for said metal product along the entire outer surface of the bell-shaped member.
  • the rotor of the coil laying head of the invention advantageously comprises a substantially bell-shaped member made in stages: in fact, it consists of a plurality of stages or truncated-cone-shaped parts which, arranged in a sequence, form the grooved bell that allows the formation of coils.
  • Grooves are made on each stage of the bell-shaped member of the rotor.
  • the first stage has a very small end diameter on the side of the feeding means for feeding the metal product, allowing the implementation of a small number of grooves.
  • the number of grooves may increase in the next stages as the diameter of the cross section of the bell-shaped member increases.
  • the grooves or channels are again in a small number, preferably equal to or twice the number of grooves of the first stage. This is because in said last stage the helix pitch of the grooves is reduced, resulting in an axial crowding of the grooves and thus making it geometrically impossible to increase the number thereof.
  • the stages are arranged in a relative angular position to each other such as to create at least one continuous and complete spiral path for the rolled product.
  • the number of grooves provided on each stage is maximized based on the geometry of the stage, in order to use the whole surface of the bell-shaped member of the rotor as much as possible.
  • the numbers of grooves on the different stages have a greatest common divisor equal to the number of grooves provided on the first stage: this ensures that the replacement of the stages takes place in a calculated manner and a stage with a large number of grooves is replaced at a change of the first stage.
  • the wear detected on different stages can be very different; in fact, the grooves of some stages may each have a double duration with respect to the grooves of other particularly stressed stages.
  • Worn grooves are generally visibly recognizable but in order to prevent having to move the product again in a groove already worn out, the management of the angular positions of the stages of the bell-shaped member is carried out by control means provided with suitable software, which also allows minimizing the relative rotations required between consecutive stages.
  • the angular position between two adjacent stages is advantageously fixed by means of a pin, which keeps the relative angular position between two consecutive stages of the bell-shaped member and allows identifying the "open” channels to be used and those "closed” which have no continuation in the next stage.
  • the coil laying head object of the present invention is diagrammatically shown according to a cross section along a plane passing by the longitudinal axis X.
  • the coil laying head includes:
  • Rotor 1 in turn comprises a mandrel 4 and a bell-shaped member 6, having a substantially truncated-cone shape, which expands outwards with respect to the longitudinal axis X and axially cooperates with mandrel 4.
  • the bell-shaped member 6 is provided on its outer surface with a plurality of grooves or channels, substantially spiral-shaped, for guiding the metal product to the coil formation.
  • mandrel 4 having a hollow cylindrical shape
  • mandrel 4 is stably connected by means of mechanical coupling to the bell-shaped member 6 according to axis X.
  • the bell-shaped member 6 fits in mandrel 4 by an initial stretch and is inserted in a housing 2 having a shape matching the shape of said member 6.
  • housing 2 has a truncated-cone inner shape.
  • Housing 2 is integral with base or casing 3 of the coil laying head and is therefore fixed, i.e. not rotating.
  • a limited gap for example of at least 1 mm, is left between the bell-shaped member 6 and housing 2, in general sufficient to allow a relative rotation of the bell-shaped member 6 about axis X without causing interference or sliding against housing 2.
  • such a gap is lower than the thickness of the laminate.
  • housing 2 may be openable so as to allow access to the bell-shaped member 6.
  • housing 2 may be sliding along axis X with respect to the bell-shaped member 6 to vary the gap between housing 2 and the bell-shaped member itself.
  • Mandrel 4 rotates inside casing 3, fixed to the ground. Mandrel 4 is rotatably associated with said casing 3 by means of bearings. Casing 3 may be entirely monolithic with housing 2.
  • Mandrel 4 contains internally feeding means 5 for feeding the metal product to at least one of the grooves provided on the bell-shaped member 6.
  • Such feeding means 5 for example comprise a selector tube arranged coaxially to the rotor and provided with an inner conduit 5' for guiding the rolled product to the entrance of a respective groove on the bell-shaped member 6.
  • the inner conduit 5' has an inlet stretch for receiving the rolled product, which enters the head along axis X.
  • Such an inner conduit 5' has an exit stretch that diverges from axis X to guide the rolled product at the entrance of one of the grooves on the bell-shaped member 6.
  • a main control connected with mandrel 4 is provided for driving the bell-shaped member 6 in rotation about axis X, for example by means of a reduction gear or equivalent means.
  • the selector tube always rotates synchronously with bell-shaped member 6 and mandrel 4 during the passage of the laminate, so as to continuously ensure the alignment between the outlet stretch of the inner conduit 5' and one of the grooves provided on the bell-shaped member 6.
  • the selector tube can preferably receive the motion from the same mandrel 4, for example by means of a differential phaser system.
  • the bell-shaped member 6 is made in at least three substantially truncated-cone stages arranged joined and in a sequence along the longitudinal axis X so that the outer surfaces thereof, provided with spiral-shaped grooves, together define the outer surface of member 6.
  • the group of the numbers of spiral-shaped grooves of each stage has a greatest common divisor which is equal to the number of spiral-shaped grooves 7', named first number, of a first end stage 7 of the bell-shaped member 6, proximal to the feeding means 5.
  • a second end stage 11, distal from said feeding means 5, is provided, on an outer surface thereof, with a second number of spiral-shaped grooves 11', either equal to or multiple of said first number of grooves 7'.
  • Said second end stage 11 of the bell-shaped member 6 has a substantially cylindrical end stretch where said second number of spiral-shaped grooves 11' follows approximately an angle of 360°, and wherein it is preferable that the number of grooves 11' is small, for example equal to or at most twice the number of grooves 7', since said grooves must preferably have a very small pitch.
  • At least one intermediate stage is also provided, arranged between said first end stage 7 and second end stage 11 and provided with a respective number of spiral-shaped grooves on the outer surface thereof which advantageously is a multiple of said first number of grooves 7'.
  • the number of grooves of two adjacent stages can advantageously be different, in particular in the case where it is geometrically possible to make a suitable number of grooves on the two stages, or it can equally advantageously be the same if for example the grooves of the two stages, due to their position, undergo different wear and therefore have different lifespan.
  • Angular positioning means are provided for adjusting the angular position of one stage with respect to the next one.
  • said angular positioning means are represented by at least one connecting pin 20, provided in at least one of two adjacent stages constituting the bell-shaped member 6.
  • the bell-shaped member 6 consists of five substantially truncated-cone stages: the two end stages 7, 11 and three intermediate stages 8, 9, 10.
  • the number of grooves 7' is equal to the number of grooves 11', while the number of grooves provided on the intermediate stages 8, 9, 10 is different from one another and is also a multiple of the number of grooves 7'.
  • the first intermediate stage 8 has a third number of grooves 8' which is triple of said first number
  • the second intermediate stage 9 has a fourth number of grooves 9' which is double of said third number
  • the third intermediate stage 10 has a fifth number of grooves 10' which is triple of said third number.
  • variants may include a first number of grooves 7' equal to three or five, which will therefore be the greatest common divisor of the numbers of grooves provided in each of the five stages.
  • the bell-shaped member 6 consists of six substantially truncated-cone stages: the two end stages and four intermediate stages.
  • the number of grooves 7' of the first end stage 7, named first number is equal to the number of grooves 11' of the second end stage 11, while the number of grooves is different between an intermediate stage and the next one and is a multiple of said first number of grooves 7'.
  • first number is equal to the number of grooves 11' of the second end stage 11, while the number of grooves is different between an intermediate stage and the next one and is a multiple of said first number of grooves 7'.
  • the first and the third intermediate stages have an equal number of grooves
  • the second and the fourth intermediate stages have a number of grooves which is different from each other and also different from the number of grooves of the first and third intermediate stages.
  • the second intermediate stage may have a number of grooves twice the number of grooves of the first intermediate stage
  • the fourth intermediate stage may have a number of grooves triple the number of grooves of said first intermediate stage.
  • the number of grooves 7' of the first end stage 7, named first number is equal to the number of grooves 11' of the second end stage 11, while the number of grooves is different or equal between an intermediate stage and the next one and is a multiple of said first number of grooves 7'.
  • first number is equal to the number of grooves 11' of the second end stage 11, while the number of grooves is different or equal between an intermediate stage and the next one and is a multiple of said first number of grooves 7'.
  • the second and the third intermediate stages have an equal number of grooves
  • the first and the fourth intermediate stages have a number of grooves which is different from each other and also different from the number of grooves of the second and third intermediate stages.
  • the fourth intermediate stage may have a number of grooves triple the number of grooves of the first intermediate stage
  • the second and the third intermediate stages may have a number of grooves twice the number of grooves of said first intermediate stage.
  • the bell-shaped member 6 consists of four substantially truncated-cone stages: the two end stages 7, 11 and two intermediate stages.
  • the number of grooves 7' is equal to the number of grooves 11', while the number of grooves provided on the two intermediate stages is different from one another and is a multiple of the number of grooves 7'.
  • All the spiral grooves provided in the different stages constituting the bell-shaped member 6 are open outwards and have a cross-sectional dimension which is a function of the diameter of the rolled product to be wound into coils.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)
  • Dry Shavers And Clippers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (17)

  1. Windungslegekopf, der eine Längsachse (X) definiert, zum Formen von Windungen aus einem im Wesentlichen geraden Metallprodukt, aufweisend:
    - eine feststehende Tragstruktur (3)
    - einen Rotor (1), der um die Längsachse (X) rotieren kann und drehbar auf der Tragstruktur (3) befestigt ist,
    wobei der Rotor ein glockenförmiges Element (6) aufweist, das sich gegenüber der Längsachse (X) nach außen erstreckt und eine äußere Oberfläche aufweist, die dort mit mindestens einer spiralförmigen Nut versehen ist, um das Metallprodukt zu führen, wobei Zuführungsmittel (5) vorgesehen sind, um das Metallprodukt zu der mindestens einen Nut zu führen, dadurch gekennzeichnet, dass
    das glockenförmige Element (6) aus mindestens drei hintereinander angeordneten Stufen entlang der Längsachse (X) besteht, so dass die äußeren Oberflächen der Stufen, die mit spiralförmigen Nuten versehen sind, zusammen die äußere Oberfläche des glockenförmigen Elements (6) definieren und durch Drehung mindestens einer Stufe um die Längsachse (X) in eine entsprechende, relative Drehposition so angeordnet werden können, dass mindestens ein kontinuierlicher spiralförmiger Pfad für das Metallprodukt entlang der gesamten äußeren Oberfläche des glockenförmigen Elements (6) definiert wird.
  2. Windungslegekopf gemäß Anspruch 1, wobei die Anzahl der spiralförmigen Nuten einer jeden Stufe einen größten gemeinsamen Teiler hat.
  3. Windungslegekopf gemäß Anspruch 2, wobei der größte gemeinsame Teiler gleich der Anzahl von Nuten (7') - erste Anzahl genannt - einer ersten Endstufe (7) des glockenförmigen Elements (6) ist, die dem Zuführungsmittel (5) am nächsten ist.
  4. Windungslegekopf gemäß Anspruch 3, wobei eine zweite Endstufe (11) distal des Zuführungsmittels (5) an einer äußeren Oberfläche hiervon vorgesehen ist, mit einer zweiten Anzahl von spiralförmigen Nuten (11'), die entweder gleich der ersten Anzahl oder ein Vielfaches davon ist,
    und wobei mindestens eine zwischen der ersten Endstufe und der zweiten Endstufe angeordnete Zwischenstufe (8, 9, 10) an einer äußeren Oberfläche vorgesehen ist, mit einer entsprechenden Anzahl von spiralförmigen Nuten (8', 9', 10'), die ein Vielfaches der ersten Anzahl ist.
  5. Windungslegekopf gemäß Anspruch 1, wobei Mittel zur Winkelpositionierung vorgesehen sind, um die Drehposition einer Stufe bezüglich der nächsten einzustellen.
  6. Windungslegekopf gemäß Anspruch 5, wobei die Mittel zur Winkelpositionierung aus mindestens einem Verbindungsstift (20) besteht, der in mindestens einer von zwei benachbarten Stufen vorgesehen ist.
  7. Windungslegekopf gemäß einem der vorigen Ansprüche, wobei die äußere Oberfläche des glockenförmigen Elements (6) im Wesentlichen die Form eines Kegelstumpfes hat.
  8. Windungslegekopf gemäß Anspruch 4, wobei die zweite Endstufe (11) des glockenförmigen Elements (6) ein im Wesentlichen zylindrisches Endsegment aufweist, dessen zweite Anzahl von spiralförmigen Nuten (11') in etwa einem Winkel von 360° folgt.
  9. Windungslegekopf gemäß Anspruch 4 oder 8, wobei drei Zwischenstufen (8, 9, 10) hintereinander vorgesehen sind, deren Anzahl von Nuten unterschiedlich, aber ein Vielfaches der ersten Anzahl ist.
  10. Windungslegekopf gemäß Anspruch 9, wobei eine erste Zwischenstufe (8) eine dritte Anzahl von Nuten (8') aufweist, die das dreifache der ersten Anzahl beträgt, eine zweite Zwischenstufe (9) eine vierte Anzahl von Nuten (9') aufweist, die das doppelte der dritten Anzahl beträgt, und eine dritte Zwischenstufe (10) eine fünfte Anzahl von Nuten (10') aufweist, die das dreifache der dritten Anzahl beträgt.
  11. Windungslegekopf gemäß Anspruch 4 oder 8, wobei vier Zwischenstufen hintereinander vorgesehen sind, und wobei eine der Zwischenstufen und die Darauffolgende entweder eine unterschiedliche oder die gleiche Anzahl von Nuten aufweisen, jedoch ein Vielfaches der ersten Anzahl.
  12. Windungslegekopf gemäß Anspruch 11, wobei eine erste Zwischenstufe und eine dritte Zwischenstufe eine dritte Anzahl von Nuten aufweisen, während eine zweite Zwischenstufe und eine vierte Zwischenstufe eine zueinander unterschiedliche Anzahl von Nuten aufweisen, die zudem unterschiedlich zur dritten Anzahl ist.
  13. Windungslegekopf gemäß Anspruch 12, wobei die zweite Zwischenstufe eine vierte Anzahl von Nuten aufweist, die das doppelte der dritten Anzahl beträgt, und die vierte Zwischenstufe eine fünfte Anzahl von Nuten aufweist, die das dreifache der dritten Anzahl beträgt.
  14. Windungslegekopf gemäß Anspruch 11, wobei eine zweite Zwischenstufe und eine dritte Zwischenstufe eine dritte Anzahl von Nuten aufweisen, während eine erste Zwischenstufe und eine vierte Zwischenstufe eine zueinander unterschiedliche Anzahl von Nuten aufweisen, die zudem unterschiedlich zur dritten Anzahl ist.
  15. Windungslegekopf gemäß Anspruch 14, wobei die vierte Zwischenstufe eine vierte Anzahl von Nuten aufweist, die das dreifache der Anzahl der Nuten der ersten Zwischenstufe beträgt, während die dritte Anzahl der Nuten das doppelte der Anzahl der Nuten der ersten Zwischenstufe beträgt.
  16. Windungslegekopf gemäß Anspruch 4 oder 8, wobei zwei Zwischenstufen vorgesehen sind, die eine zueinander unterschiedliche Anzahl von Nuten aufweisen, die ein Vielfaches der ersten Anzahl betragen.
  17. Windungslegekopf gemäß einem der vorigen Ansprüche, wobei das glockenförmige Element (6) koaxial mit einem Dorn (4) zusammenwirkt, der innen die Zuführungsmittel (5) aufweist.
EP13820979.6A 2012-12-10 2013-12-09 Spulenschichtkopf Active EP2931450B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT002100A ITMI20122100A1 (it) 2012-12-10 2012-12-10 Testa forma-spire
PCT/IB2013/060746 WO2014091390A1 (en) 2012-12-10 2013-12-09 Coil laying head

Publications (2)

Publication Number Publication Date
EP2931450A1 EP2931450A1 (de) 2015-10-21
EP2931450B1 true EP2931450B1 (de) 2017-03-22

Family

ID=47683847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13820979.6A Active EP2931450B1 (de) 2012-12-10 2013-12-09 Spulenschichtkopf

Country Status (5)

Country Link
EP (1) EP2931450B1 (de)
CN (1) CN104918723B (de)
ES (1) ES2628406T3 (de)
IT (1) ITMI20122100A1 (de)
WO (1) WO2014091390A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014162275A1 (en) 2013-04-03 2014-10-09 Koninklijke Philips N.V. Interventional x-ray system
ITUB20159695A1 (it) 2015-12-18 2017-06-18 Danieli Off Mecc Testa forma-spire

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1281459B1 (it) * 1995-12-04 1998-02-18 Danieli Off Mecc Testa forma spire per impianti di laminazione
DE19823198A1 (de) * 1998-05-23 1999-11-25 Schloemann Siemag Ag Windungslegerohr
US7011264B2 (en) * 2002-06-19 2006-03-14 Morgan Construction Company Laying head for rod rolling mill
ITMI20050952A1 (it) * 2005-05-25 2006-11-26 Danieli Off Mecc Testa formaspire con rotore multicanale
US20110108652A1 (en) * 2009-11-12 2011-05-12 Morgan Construction Company Rolling mill laying head
ITMI20110344A1 (it) * 2011-03-04 2012-09-05 Danieli Off Mecc Testa forma-spire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2628406T3 (es) 2017-08-02
ITMI20122100A1 (it) 2014-06-11
EP2931450A1 (de) 2015-10-21
CN104918723B (zh) 2016-12-07
CN104918723A (zh) 2015-09-16
WO2014091390A1 (en) 2014-06-19

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