EP1706222A1 - Procede permettant d'ajuster la position d'un mandrin d'une extrudeuse pour produire des profiles creux - Google Patents

Procede permettant d'ajuster la position d'un mandrin d'une extrudeuse pour produire des profiles creux

Info

Publication number: EP1706222A1
Authority: EP; European Patent Office
Prior art keywords: mandrel; cylinder; piercing; extrusion press; punch
Prior art date: 2004-01-15
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

EP05706681A

Other languages

German (de)

English (en)

Other versions

EP1706222B1 (fr

Inventor

Ewald Hagen

Arnold Schwippe

Andreas Wershofen

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.)

SMS Group GmbH

Original Assignee

SMS Eumuco GmbH

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.)

2004-01-15

Filing date

2005-01-14

Publication date

2006-10-04

2005-01-14 Application filed by SMS Eumuco GmbH filed Critical SMS Eumuco GmbH

2006-10-04 Publication of EP1706222A1 publication Critical patent/EP1706222A1/fr

2007-09-12 Application granted granted Critical

2007-09-12 Publication of EP1706222B1 publication Critical patent/EP1706222B1/fr

2025-01-14 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, rods or tubes
- B21C23/085—Making tubes
- 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
- B21C23/217—Tube extrusion presses

Definitions

the invention relates to a method for controlling the position of a piercing mandrel, arranged in a hydraulic punching device, consisting of a cylinder and a piston, which form a piercing mandrel cylinder, an extrusion press for producing pipes which are loaded from a receiver upstream of the extrusion tool and by means of the Pin punch punched blocks are pressed out.
a metal extrusion press for the production of hollow profiles or tubes has become known from DE patent specification 1 227 858.
the piston of the piercing mandrel cylinder is connected to a perforated cross-beam which is slidably guided in the barrel of the press.
the perforated mandrel In order to position the perforated mandrel guided by the press punch in the tool / die during the extrusion of hollow profiles or pipes and to maintain this position with high accuracy during pressing, the perforated mandrel is held in position by the piercing mandrel cylinder during the pressing process in practical operation of the extrusion press , In order for this position of the punch to be held in the tool, the cylinder has to move the punch back at exactly the same speed as the press punch is moving forward.
disturbances due to forming forces, friction and hydraulic compressibility come into play, which must be compensated for by the control system in a highly dynamic manner.
the invention is therefore based on the object of providing a method of the type mentioned at the outset which, in a simple manner and in particular without requiring servo valves, enables a mandrel position control which corresponds to all requirements.
This object is achieved in that the punch cylinder is driven directly by pumps set to a pre-calculated delivery rate depending on the pressing speed and an additional delivery rate is given to the pre-calculated pump delivery rate, with the Regulating the position of the piercing mandrel, a control valve acting on the ring side of the piercing mandrel cylinder is connected to a tank. Due to the direct drive, ie without an intermediate control valve, so that there is no servo valve between the pump and mandrel cylinder, rather only conventional, cost-effective and inexpensive cartridge valves can be used for the direction of movement, no pressure losses are generated for the pump volume flow. It can thus be achieved that the pump pressure corresponds to the working pressure at the piercing cylinder. In addition, there are almost no energy losses and the working pressures on the pumps are lower.
the direct drive only requires a single, small, with very high accuracy and fast-working control valve for the entire speed range. This is accompanied by a very large cost saving.
the pumps are set to a delivery rate as a function of the pressing speed, which produces an approximately equal retraction speed of the punch cylinder.
the piercing mandrel thus assumes approximately a constant position in the tool during the entire pressing process.
an additional delivery rate is added to the pump demand rate. This additional delivery rate precludes the punch cylinder from moving out of the tool position backwards against the pressing direction.
the small control valve provided for regulation on the ring side of the piercing cylinder creates the connection from the ring surface of the cylinder to the tank and regulates the amount of oil required for positional positioning to the tank.
the punch is moved back out of the tool; if, on the other hand, the amount of oil to the tank is larger, the piercing mandrel is pushed further into the tool.
the control valve maintaining the position via a controller thus compensates for the disturbance variables.
the outlet pressure of the piercing cylinder be regulated to a fixed pressure is set.
a mandrel position control can also be implemented when the tensile forces on the mandrel decrease or when the forces are reversed.
a proportional pressure relief valve on the cylinder outlet side or on the piston surface side of the piercing cylinder. A stable control behavior can thus be achieved even with reversing or falling forces on the mandrel.
the pressures on both sides of the mandrel cylinder are monitored, for example by means of pressure load cells arranged both on the ring side and on the outlet side of the mandrel cylinder, it is possible to switch on a second regulator and monitor the pressures on both cylinder sides when the pressure falls below one the outlet pressure so that the set pressure is set on the retracting side of the mandrel cylinder.
the hydraulic system is therefore always in a clamped state and enables regulation independent of the direction of force.
the punch cylinder 8 is driven directly by pumps 11.
its ring side 12 is connected to the pump 11 shown via a hydraulic line 13 connected, which is assigned an inlet valve 14 in the conveying direction.
a tank line 15 branching off from the hydraulic line 13 has an integrated small control valve (NG10) 16 connected to a regulator (not shown) and opens into a tank 17.
NG10 integrated small control valve
the delivery quantity of the pumps 11, which is precalculated depending on the pressing speed, is fed in to the ring side 12 of the piercing mandrel cylinder 8 to correct disturbance variables.
the piercing pin 10 is immediately moved out of the tool 3 when the amount of oil to the tank 17 is less than the value of the additional delivery amount.
the punch 10 is moved further into the tool 3 when the amount of oil to the tank 17 becomes greater than the value of the additional delivery amount.
the piercing mandrel 10 thus always finds an approximately constant position in the tool 3 during the entire pressing process.
the two cylinder sides 12, 18 of the piercing cylinder 8 are monitored for pressure.
both its ring side 12 and its outlet side 18 are assigned a pressure cell 19a or 19b.
a proportional pressure relief valve or pressure control valve 21 is connected to a further regulator, not shown.
the pressure on the outlet side 18 can be raised so far when the pressure falls below a predetermined value that the pressure established on the ring side 12 or retraction side of the piercing pin cylinder 8 is established ,
the hydraulic system is thus always in a clamped state and enables regulation independent of the Direction of force, so that reaction to falling tensile forces on the mandrel 10 or when the forces are reversed.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Extrusion Of Metal (AREA)
Control Of Presses (AREA)
Press Drives And Press Lines (AREA)
Heat Treatment Of Steel (AREA)
Heat Treatment Of Articles (AREA)

EP05706681A 2004-01-15 2005-01-14 Procede permettant d'ajuster la position d'un mandrin d'une extrudeuse pour produire des profiles creux Expired - Lifetime EP1706222B1 (fr)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
DE102004002377		2004-01-15
DE102005001764A DE102005001764A1 (de)	2004-01-15	2005-01-13	Verfahren zur Regelung der Lage eines Lochdorns einer Strangpresse zum Herstellen von Hohlprofilen
PCT/DE2005/000049 WO2005068100A1 (fr)	2004-01-15	2005-01-14	Procede permettant d'ajuster la position d'un mandrin d'une extrudeuse pour produire des profiles creux

Publications (2)

Publication Number	Publication Date
EP1706222A1 true EP1706222A1 (fr)	2006-10-04
EP1706222B1 EP1706222B1 (fr)	2007-09-12

Family

ID=34796605

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP05706681A Expired - Lifetime EP1706222B1 (fr)	2004-01-15	2005-01-14	Procede permettant d'ajuster la position d'un mandrin d'une extrudeuse pour produire des profiles creux

Country Status (7)

Country	Link
US (1)	US8011219B2 (fr)
EP (1)	EP1706222B1 (fr)
JP (1)	JP4416799B2 (fr)
AT (1)	ATE372836T1 (fr)
DE (2)	DE102005001764A1 (fr)
ES (1)	ES2294678T3 (fr)
WO (1)	WO2005068100A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102011009689B4 (de) *	2010-02-25	2012-09-13	Sms Meer Gmbh	Strangpresse zum Herstellen von Profilen aus Nichteisenmetall
CN101773947B (zh) *	2010-03-25	2011-09-07	中南大学	一种数字式水压挤压机速度控制系统和方法
JP5538096B2 (ja) *	2010-06-30	2014-07-02	三菱アルミニウム株式会社	油圧装置の制御方法と油圧装置
CN103157689B (zh) *	2011-12-15	2016-08-03	广东科达洁能股份有限公司	精确定位的液压装置
JP5945953B2 (ja) *	2012-10-11	2016-07-05	宇部興産機械株式会社	複動型押出プレス装置
JP5979491B2 (ja) *	2012-11-12	2016-08-24	宇部興産機械株式会社	複動型押出プレス
JP6232745B2 (ja) *	2013-05-24	2017-11-22	宇部興産機械株式会社	複動型押出プレス
CN104653525A (zh) *	2015-02-16	2015-05-27	梁润明	一种型材挤压机闭式供油系统
CN104690102B (zh) *	2015-03-10	2018-04-10	梁润明	一种改进型采用闭式加压供油型材挤压机
CN107497872A (zh) *	2017-09-13	2017-12-22	兴发铝业（成都）有限公司	新型铝型材挤压机节能系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1102085B (de) *	1959-11-16	1961-03-16	Schloemann Ag	Hydraulische Metallrohrpresse
DE1227858B (de)	1960-01-23	1966-11-03	Schloemann Ag	Liegende Metallstrangpresse mit einem in einem Zylinder gefuehrten Hauptpresskolben
DE1452452A1 (de) *	1962-12-06	1969-04-24	Schloemann Ag	Hydraulische Rohr- und Strangpresse mit hinter dem Pressenzylinder angeordneter Lochvorrichtung
US3362208A (en) *	1965-01-07	1968-01-09	Reynolds Metals Co	Extruding metal members of varying wall thickness
GB1312703A (en) *	1969-05-29	1973-04-04	Sack Gmbh Maschf	Extrusion press
US3868841A (en) *	1973-03-30	1975-03-04	Aluminum Co Of America	Process and means for making thick end tube and pipe
US3950979A (en) *	1974-10-04	1976-04-20	Western Electric Company, Inc.	Apparatus and method for tube extrusion
JPS5456967A (en) *	1977-10-15	1979-05-08	Kobe Steel Ltd	Indirect extrusion method
US4397175A (en) *	1981-04-24	1983-08-09	The Gleason Works	Apparatus for controlling the movement of a reciprocatory hydraulically driven element
US4523444A (en) *	1982-12-13	1985-06-18	Fuchs Jr Francis J	Methods of and apparatus for controlling the gap between a mandrel and die during extrusion

2005
- 2005-01-13 DE DE102005001764A patent/DE102005001764A1/de not_active Withdrawn
- 2005-01-14 EP EP05706681A patent/EP1706222B1/fr not_active Expired - Lifetime
- 2005-01-14 ES ES05706681T patent/ES2294678T3/es not_active Expired - Lifetime
- 2005-01-14 WO PCT/DE2005/000049 patent/WO2005068100A1/fr not_active Ceased
- 2005-01-14 US US10/586,202 patent/US8011219B2/en active Active
- 2005-01-14 AT AT05706681T patent/ATE372836T1/de active
- 2005-01-14 DE DE502005001481T patent/DE502005001481D1/de not_active Expired - Lifetime
- 2005-01-14 JP JP2006548109A patent/JP4416799B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005068100A1 *

Also Published As

Publication number	Publication date
ES2294678T3 (es)	2008-04-01
EP1706222B1 (fr)	2007-09-12
US20080245125A1 (en)	2008-10-09
DE102005001764A1 (de)	2005-10-06
DE502005001481D1 (de)	2007-10-25
JP4416799B2 (ja)	2010-02-17
WO2005068100A1 (fr)	2005-07-28
US8011219B2 (en)	2011-09-06
ATE372836T1 (de)	2007-09-15
JP2007517669A (ja)	2007-07-05

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