EP2000226B1 - Improved press for extruding non-ferrous metal section members - Google Patents
Improved press for extruding non-ferrous metal section members Download PDFInfo
- 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
- Authority
- 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
Links
- 239000002184 metal Substances 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title abstract description 8
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- 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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, 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)
- Powder Metallurgy (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Presses (AREA)
Abstract
Description
- 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 fromJP-A-013 09 718 - More specifically, 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 above mentioned presses conventionally use variable displacement pumps, coupled to servo-valves and electric motors.
- In such constructions, 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.
- Accordingly, 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 above objects, as well as yet other objects, are achieved by the extruding press according to
claim 1. - Preferred embodiments of the invention are defined in the dependent claims.
- With respect to prior non-ferrous metal section member extruding presses, 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 above objects, as well as yet other objects, advantages and features of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred embodiment of the invention, which is illustrated, by way of a non limitative example, in the accompanying drawings, where:
-
Figure 1 is an operating diagram of a conventional extruding press for extruding non-ferrous material section members; -
Figure 2 shows a schematic diagram of an inventive extruding press;
and -
Figure 3 shows an operating diagram and principle of a low inertia motor used in the extruding press shown infigure 2 . - The extruding
press 1 offigure 1 , which is a conventional type of extruding press, comprises apressing 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 orhydraulic driving cylinders respective driving circuit 5, by a variable displacement pump 6. - In particular, said 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 adriving pump 9, controlled by adedicated motor 10. The rotary movement of the pump 6 plate 7 is controlled with constant R.P.M.'s, by a drivingmotor 11, coupled to theelectric mains 13, through aswitching assembly 12. - In this prior embodiment, 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 thecylinders press 1. - This is provided to overcome the drawbacks related to a slow response of the
electric motor 11 to the operation of the pump 6, the flow-rate or displacement of which is controlled by the inclination of its plate 7. - The extruding press according to the invention, indicated by the
reference number 14 infigure 2 , comprises a pressing or extrudingpunch 2, in which thehydraulic cylinders hydraulic circuit 5, by apiston pump 15. - Said
piston pump 15 is in turn controlled by a low inertiaelectric motor 16, in particular a converter three-phase asynchronous motor, having a forced ventilating system and a square motor casing. - As is clearly shown in the diagram of
figure 3 , saidelectric motor 16 is a four-pole three-phase asynchronous motor, comprising asquare 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 themotor brake 25 and for the encoder, insulatingelements 21, strengthened by vacuum resins, alow inertia rotor 22,thermal probes 23, having a non-linear variable resistance, arranged in the motor windings, and a low leakmagnetic 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 themotor 16 is in turn controlled by aninverter 17 coupled to themains 13. - According to the present invention, the flow-rate of the operating fluid to the
cylinders pump 15 which, in this case, has a constant delivery flow-rate, but by the revolution number of themotor 16 driving saidpump 15. - In fact, 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 extrudingpunch 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. - For further clarifying the advantages of the invention with respect to the above disclosed prior art, a Table is herein enclosed, showing the power drain of a
conventional motor 11 and of alow inertia motor 16, as the flow-rate and pressure of thepumps 6 and 15 change depending on the fluid delivery required by the press oil-dynamic cylinders - In the herein considered example, the
pumps 6 and 15 of theextruding systems motor 10 of thepump 9 of the servo-valve 8 of the system offigure 1 , on the contrary, 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 arespective pump 6 and 15. - The
motor 10 has a power of about 25 kW.TABLE MATERIAL LOADING EXTRUDING PERIOD OF REST OF THE PRESS SERVO- VALVE 8TOTAL CONSUMED POWER/DAY (kWh) Prior art Consumed Power I X 70 I X 130 I X 25 (kW) II X 70 II X 130 II X 25motors 11III X 70 III X 25III X 25Total consumed power (kW) by the motors 11210 285 75 Power consume/day (kWh) 603 5.700 75 360 6.738 Invention I X 70 I X 130 I/ Consumed Power (kW) by the motors 16II X 70 II X 130 II/ III X 70 III/ III/ Total Consumed Power (kW) for the motors 16210 260 / Consumed power/day (kWh) 603 5.200 / / 5.803 - As shown in the above Table, the power saving achieved by the system of
figure 2 (due to the reduction of the number of the operating motors) corresponds to about 14%/day. - This power saving is obviously multiplied as a greater number of
motors 16 andcorresponding pumps 15 are used.
Claims (6)
- An extruding press for extruding nonferrous metal section members, of the type comprising an extruding punch (2), driven by hydraulic driving cylinders (3, 4) in turn driven by at least a pump (15) controlled by a motor (16), characterized in that said motor (16) is an electric low moment of inertia motor.
- An extruding press according to claim 1, characterized in that said motor (16) is a three-phase asynchronous motor for converters.
- An extruding press according to claim 2, characterized in that said motor (16) is a four-pole three-phase asynchronous motor, including a square casing (18) and an independent radial electro-fan (19).
- An extruding press according to claim 3, characterized in that said motor (16) comprises a double-output motor shaft (26) for coupling an encoder, vacuum resin reinforced insulating elements (21), a low inertia rotor (22), a non-linear variable resistance thermal probes (23) arranged in the motor windings and a low leakage magnetic metal sheet element (24).
- An extruding press according to any of the preceding claims 1 to 4, characterized in that said extruding press further comprises an inverter (17) for adjusting the number of revolutions of said motor (16).
- An extruding press according to claim 5, characterized in that said at least a pump is a constant flow-rate pump (15) controlled by said motor (16) without an assistance of a servo-valve device.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001153A ITMI20071153A1 (en) | 2007-06-06 | 2007-06-06 | IMPROVED TYPE PRESS FOR EXTRUSION OF NON-FERROUS METAL PROFILES. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2000226A1 EP2000226A1 (en) | 2008-12-10 |
EP2000226B1 true EP2000226B1 (en) | 2009-10-21 |
Family
ID=39764263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08010226A Revoked EP2000226B1 (en) | 2007-06-06 | 2008-06-05 | Improved press for extruding non-ferrous metal section members |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2000226B1 (en) |
AT (1) | ATE446148T1 (en) |
DE (1) | DE602008000228D1 (en) |
ES (1) | ES2335716T3 (en) |
IT (1) | ITMI20071153A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011009689A1 (en) | 2010-02-25 | 2011-08-25 | SMS Meer GmbH, 41069 | Extruder for producing non-ferrous metal profiles |
Families Citing this family (3)
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 (en) * | 2015-06-11 | 2018-04-18 | Turla S.r.l. | Extrusion press for non-ferrous metal sections |
CN106862291A (en) * | 2017-03-31 | 2017-06-20 | 江苏瑞格新材料有限公司 | A kind of steel alloy building mortion |
Citations (2)
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 (en) | 1980-04-29 | 1981-11-11 | Vmei "Lenin" | Method and apparatus for pressworking a workpiece or material |
Family Cites Families (2)
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 (en) * | 1988-06-08 | 1989-12-14 | Nippon Alum Mfg Co Ltd | Controlling device for extrusion speed |
-
2007
- 2007-06-06 IT IT001153A patent/ITMI20071153A1/en unknown
-
2008
- 2008-06-05 EP EP08010226A patent/EP2000226B1/en not_active Revoked
- 2008-06-05 ES ES08010226T patent/ES2335716T3/en active Active
- 2008-06-05 AT AT08010226T patent/ATE446148T1/en not_active IP Right Cessation
- 2008-06-05 DE DE602008000228T patent/DE602008000228D1/en active Active
Patent Citations (2)
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 (en) | 1980-04-29 | 1981-11-11 | Vmei "Lenin" | Method and apparatus for pressworking a workpiece or material |
Non-Patent Citations (5)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011009689A1 (en) | 2010-02-25 | 2011-08-25 | SMS Meer GmbH, 41069 | Extruder for producing non-ferrous metal profiles |
EP2361700A1 (en) | 2010-02-25 | 2011-08-31 | SMS Meer GmbH | Extrusion press for manufacturing sections from non-ferrous metals |
DE102011009689B4 (en) * | 2010-02-25 | 2012-09-13 | Sms Meer Gmbh | Extruder for producing non-ferrous metal profiles |
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 |
---|---|
ES2335716T3 (en) | 2010-03-31 |
ITMI20071153A1 (en) | 2008-12-07 |
ATE446148T1 (en) | 2009-11-15 |
EP2000226A1 (en) | 2008-12-10 |
DE602008000228D1 (en) | 2009-12-03 |
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