EP0684093A1 - Rotor pour tête de formation de boucles - Google Patents

Rotor pour tête de formation de boucles Download PDF

Info

Publication number: EP0684093A1
Authority: EP; European Patent Office
Prior art keywords: loop; forming head; rotor; intake tube; cooperation
Prior art date: 1994-05-25
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

Application number

EP95106556A

Other languages

German (de)

English (en)

Other versions

EP0684093B1 (fr

Inventor

Kurt Lennart Danielsson

Alfredo Poloni

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

Priority date (The priority date 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 date listed.)

1994-05-25

Filing date

1995-05-02

Publication date

1995-11-29

1995-05-02 Application filed by Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA

1995-11-29 Publication of EP0684093A1 publication Critical patent/EP0684093A1/fr

1999-07-14 Application granted granted Critical

1999-07-14 Publication of EP0684093B1 publication Critical patent/EP0684093B1/fr

2015-05-02 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS 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

This invention concerns a rotor for a loop-forming head, as set forth in the main claim.
the loop-forming head to which this invention is applied has a substantially standard structure and conformation and cooperates upstream with a drawing means and with a bar-feeding channel and downstream with a conveyor belt to receive loops or with another means suitable to receive loops.
the rotor of the loop-forming head according to the invention can reach rotation speeds of 160 to 170 metres per second and more.
speed of rotation is meant the peripheral speed of an end of the diameter of the bore of the outlet tube for the loops from the loop-forming head.
the rotor of the loop-forming head is generally supported on conventional rolling-type bearings.
EP-A-0290249 has disclosed an embodiment in which the loop-forming head includes a first hollow shaft rotatably fitted in a first set of bearings secured to a stationary structure and a second hollow shaft, which is associated with the loop-forming head and rotates in a second set of bearings secured to the first hollow shaft.
the two hollow shafts rotate in the same direction but at different speeds; the speed of the second hollow shaft and therefore of the loop-forming head associated with that shaft is equal to the difference in speed between the first and second shafts plus the difference in speed between the first shaft and the stationary structure.
This embodiment has the effect that each set of bearings withstands only a part of the speed of rotation of the loop-forming head.
the rolling-type bearings possess modest capacities for the bearing of static and dynamic loads and also limited capacities of absorbing the vibrations which are generated, in this specific case for instance, by the imbalances due to wear of the loop-forming tube during the rolling.
the rolling-type bearings require constant maintenance and periodical replacement.
the present applicants have designed, tested and embodied this invention to overcome all the above shortcomings and to find a solution to the ever more urgent requirements of businessmen in this field, particularly as regards reliability, increase of speed, reduction of vibrations and maintenance, etc.
the purpose of the invention is to embody a loop-forming head which can reach speeds of rotation of 160 to 170 metres per second or more and of which the rotation mechanism requires little or no maintenance or lubrication.
Another purpose of the invention is to employ a rotation mechanism suitable to absorb efficiently any type of vibration and having a high load-bearing capacity under both static and dynamic conditions.
the loop-forming head to which the rotor of this invention is applied has a substantially standard structure and conformation and can include an actuation system with an independent motor or with an external motor and with an actuation system employing a bevel gear pair.
the loop-forming head are conventionally defined an inlet side facing the bar-feeding channel and an outlet side facing the outlet of the bars and positioned on the opposite side of the drive system of the rotor in relation to the inlet side.
At least one radial bearing of a magnetic type is installed in cooperation with the rotor of the loop-forming head and is positioned in cooperation with the outlet side for the bars, whereas a conventional rolling-type bearing is included in cooperation with the inlet side for the bars.
a radial magnetic bearing is also installed in cooperation with the bar inlet side.
At least one magnetic bearing of an axial type is installed at least in cooperation with the bar inlet side.
the magnetic bearings owing to their peculiar technological properties, make possible the improvement of performance in terms of speed of rotation, reduced maintenance and lubrication, load-bearing capacity and absorption of vibrations.
an initial setting system may be included to determine the correct axial position of the rotor of the loop-forming head in the transient moment of start-up.
the attached figure is given as a non-restrictive example and, with a preferred embodiment, shows diagrammatically a lengthwise section of a loop-forming head to which is applied a rotor with magnetic bearings according to the invention.
a loop-forming head 10 shown in the attached figure cooperates upstream and downstream with means (not shown here) for drawing and feeding bars, for instance a channel, and with means to remove loops, for instance a conveyor to remove loops.
the loop-forming head 10 comprises conventionally in its upstream part an axially-bored intake tube 11, which acts as a rotor for the loop-forming head 10 and is set in rotation at a very high speed.
a bar 12 emerges from the intake tube 11 and is wound by known means about an axial shaft 13 to form a loop.
the loop-forming head 10 is defined by a first segment referenced with 27, which coincides substantially with the intake tube 11 and in which the bar 12 is guided along a substantially axial development, and by a second segment 28, in which the spiral development of the bar 12 begins or has just began.
the figure shows diagrammatically two possible alternative systems for actuation of the loop-forming head 10.
the intake tube 11 can be associated with an independent drive motor 14 (shown in the lower part of the figure) or can cooperate with an external motor (not shown in the figure), which is associated with means 15 transmitting actuation with a bevel gear pair (shown in the upper part of the figure).
a radial bearing 17 of a magnetic type is installed at least in cooperation with the outlet side 16 of the intake tube 11.
the figure shows diagrammatically a core 21 and windings 22 which constitute the magnetic bearing 17.
the magnetic bearing 17 includes a housing 23 solidly associated with the intake tube 11 by means of suitable clamping means 24.
a conventional rolling-type ball-bearing or roller bearing 19, of an oblique type for instance, may be included in cooperation with the inlet side 18 of the intake tube 11, as shown diagrammatically in the lower part of the figure.
a radial magnetic bearing 20 is installed in cooperation with the inlet side 18 of the intake tube 11.
a magnetic bearing of an axial type 25 is installed in cooperation with the inlet side 18 of the intake tube 11.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Rolling Contact Bearings (AREA)
Unwinding Of Filamentary Materials (AREA)
Winding, Rewinding, Material Storage Devices (AREA)
Steering Control In Accordance With Driving Conditions (AREA)
Manufacture Of Motors, Generators (AREA)
Reciprocating, Oscillating Or Vibrating Motors (AREA)
Threshing Machine Elements (AREA)
Iron Core Of Rotating Electric Machines (AREA)
Windings For Motors And Generators (AREA)

EP95106556A 1994-05-25 1995-05-02 Rotor pour tête de formation de boucles Expired - Lifetime EP0684093B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITUD940086		1994-05-25
IT94UD000086A IT1267918B1 (it)	1994-05-25	1994-05-25	Rotore per testa forma spire

Publications (2)

Publication Number	Publication Date
EP0684093A1 true EP0684093A1 (fr)	1995-11-29
EP0684093B1 EP0684093B1 (fr)	1999-07-14

Family

ID=11421584

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95106556A Expired - Lifetime EP0684093B1 (fr)	1994-05-25	1995-05-02	Rotor pour tête de formation de boucles

Country Status (5)

Country	Link
EP (1)	EP0684093B1 (fr)
AT (1)	ATE182091T1 (fr)
DE (1)	DE69510730T2 (fr)
ES (1)	ES2137397T3 (fr)
IT (1)	IT1267918B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1175945A3 (fr) *	2000-07-21	2002-07-31	SMS Demag AG	Tête de formation de boucles avec tube de dépot pour fil laminé
WO2005084842A1 (fr) *	2004-02-24	2005-09-15	Danieli & C. Officine Mecchaniche S.P.A.	Tete d'enroulement avec dispositif d'amortissement des vibrations

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0067127A1 (fr) *	1981-05-20	1982-12-15	DANIELI & C. OFFICINE MECCANICHE S.p.A.	Têtes de pose de machines enrouleuses
EP0290249A2 (fr) *	1987-05-08	1988-11-09	MORGAN CONSTRUCTION COMPANY (a Massachusetts corporation)	Tête à jeter pour un laminoir

1994
- 1994-05-25 IT IT94UD000086A patent/IT1267918B1/it active IP Right Grant
1995
- 1995-05-02 EP EP95106556A patent/EP0684093B1/fr not_active Expired - Lifetime
- 1995-05-02 AT AT95106556T patent/ATE182091T1/de active
- 1995-05-02 DE DE69510730T patent/DE69510730T2/de not_active Expired - Lifetime
- 1995-05-02 ES ES95106556T patent/ES2137397T3/es not_active Expired - Lifetime

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0067127A1 (fr) *	1981-05-20	1982-12-15	DANIELI & C. OFFICINE MECCANICHE S.p.A.	Têtes de pose de machines enrouleuses
EP0290249A2 (fr) *	1987-05-08	1988-11-09	MORGAN CONSTRUCTION COMPANY (a Massachusetts corporation)	Tête à jeter pour un laminoir

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1175945A3 (fr) *	2000-07-21	2002-07-31	SMS Demag AG	Tête de formation de boucles avec tube de dépot pour fil laminé
WO2005084842A1 (fr) *	2004-02-24	2005-09-15	Danieli & C. Officine Mecchaniche S.P.A.	Tete d'enroulement avec dispositif d'amortissement des vibrations
CN100413611C (zh) *	2004-02-24	2008-08-27	达涅利机械工业有限公司	具有减振装置的吐丝机
US8004136B2 (en)	2004-02-24	2011-08-23	Danieli & C. Officine Meccaniche, S.P.A.	Laying head with a vibration damping device

Also Published As

Publication number	Publication date
ITUD940086A0 (it)	1994-05-25
DE69510730T2 (de)	2000-03-16
ATE182091T1 (de)	1999-07-15
EP0684093B1 (fr)	1999-07-14
ITUD940086A1 (it)	1995-11-25
IT1267918B1 (it)	1997-02-18
DE69510730D1 (de)	1999-08-19
ES2137397T3 (es)	1999-12-16

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