EP2000226B1 - Presse améliorée pour extruder des éléments à section métallique non ferreuse - Google Patents

Presse améliorée pour extruder des éléments à section métallique non ferreuse Download PDF

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Publication number
EP2000226B1
EP2000226B1 EP08010226A EP08010226A EP2000226B1 EP 2000226 B1 EP2000226 B1 EP 2000226B1 EP 08010226 A EP08010226 A EP 08010226A EP 08010226 A EP08010226 A EP 08010226A EP 2000226 B1 EP2000226 B1 EP 2000226B1
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EP
European Patent Office
Prior art keywords
motor
extruding
pump
press
extruding press
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.)
Revoked
Application number
EP08010226A
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German (de)
English (en)
Other versions
EP2000226A1 (fr
Inventor
Valerio Presezzi
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.)
PRESEZZI EXTRUSION SpA
Original Assignee
PRESEZZI EXTRUSION SpA
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Application filed by PRESEZZI EXTRUSION SpA filed Critical PRESEZZI EXTRUSION SpA
Publication of EP2000226A1 publication Critical patent/EP2000226A1/fr
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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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/211—Press driving devices
    • 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
    • B21C31/00—Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses

Definitions

  • the present invention relates to an improved press for extruding non-ferrous metal section members.
  • An extruding press according to the preamble of claim 1 is e.g. known from JP-A-013 09 718 .
  • the field of the invention is that of pressing apparatus using for extruding section members or profiled elements (such as door profiled elements, motor vehicle profiled elements and son on), starting from non-ferrous metals (such as aluminium, bronze, copper, brass and the like.
  • the press cylinder fluid (usually oil) is circulated by the pump, in turn driven at constant R.P.M.'s by the electric motor.
  • the displacement or flow-rate of the pump is changed depending on the press cylinder movement requirements (in particular during the filling of the material to be extruded), while holding the motor R.P.M.'s constant, and by changing the inclination of the pump plate, by means of a specifically designed servo-valve.
  • the above disclosed construction has the drawback that it requires that a servo-valve be used, which, in addition to being a separated component, susceptible to failure and requiring frequent servicing operations, also requires a dedicated driving system.
  • a further drawback of the above mentioned construction is the requirement of holding the electric motor in a rated operation range, even in periods in which the pump is in a rest condition, which negatively affects the overall system managing cost.
  • the main object of the present invention is to provide a novel extruding press for extruding non-ferrous metal section members, which is much more simple than conventional extruding presses and, moreover, comprises a small number of press components.
  • Another object of the present invention is to provide such an extruding press which, differently from prior like extruding presses, allows to achieve a very high power saving, in particular in driving the pump controlling motor.
  • the inventive extruding press provides the advantage of eliminating the requirement to include therein a plurality of servo-valves, and the related driving pump, as well as that to precisely control the cylinder driving pump flow-rate.
  • Yet another advantage of the inventive extruding press is that the cylinder driving pump operating motor is driven only as it is effectively required, while leaving said motor in a rest condition, or at low R.P.M.'s, as the press cylinder is in a rest condition, while discriminating the number of driving motors to be used, depending on the contingent operating requirements.
  • the extruding press 1 of figure 1 which is a conventional type of extruding press, comprises a pressing punch 2 for extruding a non-ferrous metal section member, made, for example, of an aluminium material (not shown).
  • the pressing or extruding punch 2 is in turn driven by oil-dynamic or hydraulic driving cylinders 3 and 4, therethrough the operating or driving fluid is conveyed, inside a respective driving circuit 5, by a variable displacement pump 6.
  • variable displacement pump 6 comprises a pump plate 7, the inclination of which is controlled by a respective servo-valve 8, in turn controlled by a driving pump 9, controlled by a dedicated motor 10.
  • the rotary movement of the pump 6 plate 7 is controlled with constant R.P.M.'s, by a driving motor 11, coupled to the electric mains 13, through a switching assembly 12.
  • the electric motor 11 is a conventional asynchronous motor, rotatively driving the plate 7 of the pump 6 at a constant revolution number, and accordingly independently from the operating status of the cylinders 3 and 4 of the extruding press 1.
  • the extruding press according to the invention comprises a pressing or extruding punch 2, in which the hydraulic cylinders 3 and 4 are driven by a fluid conveyed, inside the respective hydraulic circuit 5, by a piston pump 15.
  • Said piston pump 15 is in turn controlled by a low inertia electric motor 16, in particular a converter three-phase asynchronous motor, having a forced ventilating system and a square motor casing.
  • said electric motor 16 is a four-pole three-phase asynchronous motor, comprising a square casing 18, an independent radial electro-fan 19, a double-output shaft 26 for coupling an encoder assuring a high operating precision, connectors 20 for the motor brake 25 and for the encoder, insulating elements 21, strengthened by vacuum resins, a low inertia rotor 22, thermal probes 23, having a non-linear variable resistance, arranged in the motor windings, and a low leak magnetic sheet element 24, designed for providing a high electromagnetic efficiency.
  • the electric motor 16 in particular, is so designed to be coupled by frequency converters (either of a V/f or of a vectorial type) and is adapted to operate like a D.C. motor and brushless servo-motors, so as to provide a greatly improved performance with respect to a conventional asynchronous type of electric motor.
  • the number of revolutions of the motor 16 is in turn controlled by an inverter 17 coupled to the mains 13.
  • the flow-rate of the operating fluid to the cylinders 3 and 4 is herein controlled not by the pump 15 which, in this case, has a constant delivery flow-rate, but by the revolution number of the motor 16 driving said pump 15.
  • said motor 16 which, as stated, is a three-phase asynchronous motor of a type suitable for converters, has a very small inertia, thereby allowing to provide a quick response for quickly changing, if required, the displacement speed of the extruding punch 2, for example in feeding the metal material to be extruded, to properly distinguish this feeding step from the extruding step of the section member, performed with a constant extruding speed.
  • a Table is herein enclosed, showing the power drain of a conventional motor 11 and of a low inertia motor 16, as the flow-rate and pressure of the pumps 6 and 15 change depending on the fluid delivery required by the press oil-dynamic cylinders 3 and 4.
  • the pumps 6 and 15 of the extruding systems 1 and 2 respectively operate at 690 operating cycles/day, for a period of time of 15 sec during the extruding material loading step, 105 sec in the extruding step proper, and with 1 h of machine rest time.
  • the motor 10 of the pump 9 of the servo-valve 8 of the system of figure 1 operates for 24 h/day.
  • the motors 11 and respectively 16 are herein provided in a number of three, each having a power of 135 kW, for controlling each respectively a respective pump 6 and 15.
  • the motor 10 has a power of about 25 kW.
  • Prior art Consumed Power I X 70 I X 130 I X 25 (kW) II X 70 II X 130 II X 25 motors 11 III X 70 III X 25 III X 25 Total consumed power (kW) by the motors 11 210 285 75 Power consume/day (kWh) 603 5.700 75 360 6.738
  • the power saving achieved by the system of figure 2 corresponds to about 14%/day.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Press Drives And Press Lines (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)
  • Powder Metallurgy (AREA)

Claims (6)

  1. Presse à extruder permettant d'extruder des profilés en métal non ferreux, du type comprenant un poinçon d'extrusion (2), entraîné par des vérins hydrauliques d'entraînement (3, 4) à leur tour entraînés par au moins une pompe (15) commandée par un moteur (16), caractérisée en ce que ledit moteur (16) est un moteur électrique à faible moment d'inertie.
  2. Presse à extruder selon la revendication 1, caractérisée en ce que ledit moteur (16) est un moteur asynchrone triphasé pour convertisseurs.
  3. Presse à extruder selon la revendication 2, caractérisée en ce que ledit moteur (16) est un moteur asynchrone triphasé tétrapolaire, comportant un carter carré (18) et un électro-ventilateur radial indépendant (19).
  4. Presse à extruder selon la revendication 3, caractérisée en ce que ledit moteur (16) comprend un arbre de moteur à double sortie (26) permettant de coupler un codeur, des éléments renforcés en résine d'isolation sous vide (21), un rotor à faible inertie (22), des sondes thermiques non linéaires à résistance variable (23) agencées dans les enroulements du moteur et un élément de tôle métallique magnétique à faible fuite (24).
  5. Presse à extruder selon l'une quelconque des revendications 1 à 4, caractérisée en ce que ladite presse à extruder comprend en outre un inverseur (17) permettant de régler le nombre de tours par minute dudit moteur (16).
  6. Presse à extruder selon la revendication 5, caractérisée en ce que ladite au moins une pompe est une pompe à débit constant (15) commandée par ledit moteur (16) sans aide d'une servo-vanne.
EP08010226A 2007-06-06 2008-06-05 Presse améliorée pour extruder des éléments à section métallique non ferreuse Revoked EP2000226B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001153A ITMI20071153A1 (it) 2007-06-06 2007-06-06 Pressa di tipo migliorato per l'estrusione di profili di metalli non ferrosi.

Publications (2)

Publication Number Publication Date
EP2000226A1 EP2000226A1 (fr) 2008-12-10
EP2000226B1 true EP2000226B1 (fr) 2009-10-21

Family

ID=39764263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08010226A Revoked EP2000226B1 (fr) 2007-06-06 2008-06-05 Presse améliorée pour extruder des éléments à section métallique non ferreuse

Country Status (5)

Country Link
EP (1) EP2000226B1 (fr)
AT (1) ATE446148T1 (fr)
DE (1) DE602008000228D1 (fr)
ES (1) ES2335716T3 (fr)
IT (1) ITMI20071153A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011009689A1 (de) 2010-02-25 2011-08-25 SMS Meer GmbH, 41069 Strangpresse zum Herstellen von Profilen aus Nichteisenmetall

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9580966B2 (en) * 2011-08-24 2017-02-28 Lake Shore Systems, Inc. All electric powered mobile jumbo drill machine
EP3307449A1 (fr) * 2015-06-11 2018-04-18 Turla S.r.l. Presse à extrusion pour sections de métal non ferreux
CN106862291A (zh) * 2017-03-31 2017-06-20 江苏瑞格新材料有限公司 一种合金钢成形装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214464A (en) 1978-12-28 1980-07-29 Alexandrov Valery M Apparatus for controlling the thickness of rolled products
EP0039577A1 (fr) 1980-04-29 1981-11-11 Vmei "Lenin" Procédé et dispositif pour travailler par pressage une pièce ou un matériau

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649816A (en) * 1970-11-09 1972-03-14 Allegheny Ludlum Ind Inc Control system for hydraulic extrusion press
JPH01309718A (ja) * 1988-06-08 1989-12-14 Nippon Alum Mfg Co Ltd 押出し成形速度制御装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214464A (en) 1978-12-28 1980-07-29 Alexandrov Valery M Apparatus for controlling the thickness of rolled products
EP0039577A1 (fr) 1980-04-29 1981-11-11 Vmei "Lenin" Procédé et dispositif pour travailler par pressage une pièce ou un matériau

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
BALDOR, April 2007 (2007-04-01)
PARKER, December 2000 (2000-12-01)
ROCKWELL, 1997
VARIABLE SPEED PUMPING, May 2004 (2004-05-01)
VASCAT, January 2006 (2006-01-01)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011009689A1 (de) 2010-02-25 2011-08-25 SMS Meer GmbH, 41069 Strangpresse zum Herstellen von Profilen aus Nichteisenmetall
EP2361700A1 (fr) 2010-02-25 2011-08-31 SMS Meer GmbH Extrudeuse de fabrication de profilés en métal non ferreux
DE102011009689B4 (de) * 2010-02-25 2012-09-13 Sms Meer Gmbh Strangpresse zum Herstellen von Profilen aus Nichteisenmetall
US9211577B2 (en) 2010-02-25 2015-12-15 Sms Meer Gmbh Extrusion press for making profiles of nonferrous metal

Also Published As

Publication number Publication date
EP2000226A1 (fr) 2008-12-10
ATE446148T1 (de) 2009-11-15
ITMI20071153A1 (it) 2008-12-07
DE602008000228D1 (de) 2009-12-03
ES2335716T3 (es) 2010-03-31

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