EP0281515B1 - Vorrichtung zum Kühlen einer Leichtmetall-Strangpresse - Google Patents

Vorrichtung zum Kühlen einer Leichtmetall-Strangpresse Download PDF

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Publication number
EP0281515B1
EP0281515B1 EP88810090A EP88810090A EP0281515B1 EP 0281515 B1 EP0281515 B1 EP 0281515B1 EP 88810090 A EP88810090 A EP 88810090A EP 88810090 A EP88810090 A EP 88810090A EP 0281515 B1 EP0281515 B1 EP 0281515B1
Authority
EP
European Patent Office
Prior art keywords
cooling
ring
die
press
bore
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.)
Expired - Lifetime
Application number
EP88810090A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0281515A3 (en
EP0281515A2 (de
Inventor
Hannes Baumann
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.)
Aluminium AG
Original Assignee
Aluminium AG
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.)
Filing date
Publication date
Application filed by Aluminium AG filed Critical Aluminium AG
Priority to AT88810090T priority Critical patent/ATE92799T1/de
Publication of EP0281515A2 publication Critical patent/EP0281515A2/de
Publication of EP0281515A3 publication Critical patent/EP0281515A3/de
Application granted granted Critical
Publication of EP0281515B1 publication Critical patent/EP0281515B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work

Definitions

  • the invention relates to a device for cooling a light metal extrusion press, wherein at least one cooling ring is provided in the forming zone area in the direction of movement in front of the pressing die, in which a coolant circulates closed for dissipating the forming heat, with lines for the supply and discharge of the Coolant are connected.
  • Extruded light metal extruded profiles are particularly critical with regard to the pressing temperature and extrusion speed because hot short cracking easily occurs.
  • a flawless, smooth surface of the extruded strand is particularly disturbed if a critical temperature is exceeded in the material to be pressed, at which the eutectic components present as residues become liquid and as a result lead to a rough strand surface.
  • a cooling device for light metal extrusion presses in which a cooling channel is arranged in a so-called antechamber upstream of the die, which follows the contour of the particular profile shape to be produced.
  • the area immediately in front of the die and the end face of the die are cooled.
  • the matrices are stressed to the limit of their resilience. Due to the non-uniform cooling, additional stresses of thermal origin arise in the die, which in many cases lead to breakage or at least to a reduced service life of the tools.
  • EP-A-01210 256 relates to a process for continuous casting in which the material to be formed is cooled in front of the die. For this purpose there is a plate with a cooling channel open towards the face of the die.
  • the cooling system the shape of which is determined by the profile shape to be produced, is located here in the pre-dies and in the main die.
  • the cooling system has to be incorporated into the dies and adapted to the respective extruded profile shape.
  • the die is weakened and susceptible to cracking due to the temperature gradient.
  • the main purpose of this cooling device is to regulate the exit speed of the individual strands in order to obtain strands that are as long as possible.
  • cooling is carried out at the end of the die.
  • This type of construction is particularly suitable for the use of liquid nitrogen as a cooling medium, which escapes in gas form and is directed onto the strand.
  • the shape and effect of the cooling system depends on the profile shape to be produced.
  • US-A-4 462 234 shows a two-stage die that is cooled outside the press room.
  • Such a cooling device is practically only suitable for single-hole matrices.
  • the cooling device is also not independent of the die.
  • the object to be achieved by the invention is to provide an effective cooling device in a light metal extrusion press, which can be produced with simple means, is independent of the die and thus of the extrusion profile forms to be produced, and the cooling is effective in the area of the largest material forming.
  • the device according to the invention with which this object is achieved is characterized in that the cooling ring, which consists of one or more coaxial rings and is independent of the pressing die, has a bore of the same diameter as the receiving bore of the pressing bolt, and a plurality of rings which are distributed in the ring surface in the axial direction and run to bore the There are radially distanced pairs of pressbore receptacles, which are connected at their area facing away from the die-side mouth by a radial bore which is closed to the outside, and the cooling ring is surrounded radially on the outside by at least one shrunk-on pressure ring which is rigidly connected to the pressbolt pickup.
  • the cooling device is a component that is independent of the die, no additional cooling channels or other changes need to be provided on the exchangeable dies themselves, which simplifies their manufacture and permits the further use of existing dies.
  • the cooling ring does not have to be changed for different profile shapes.
  • the highly stressed die is not affected by temperature jumps charged.
  • the largest possible extrusion diameter is not affected by the cooling device.
  • the same cooling device can be used for different types of profiles, such as solid or hollow profiles, single or multi-hole matrices and for pipes with cooled or uncooled mandrel.
  • the design of the cooling elements around the die-side end of the press pin receiver bore allows the cooling medium to be brought close to the material to be cooled in the forming zone and thus to achieve a rapidly reacting and effective cooling of this forming zone. By removing the friction and forming heat directly from the forming zone, a higher inlet temperature of the press bolt can be used.
  • a press die 3 contains single or multiple openings 4, corresponding to the cross-sectional shape of extruded profiles 5 to be produced in a one-step operation closed circulates.
  • “Closed circulation” is to be understood to mean that the cooling medium does not come into contact with the goods to be cooled, but is supplied via a feed line and is led away from the cooling ring via a return line.
  • This cooling ring 12 sits coaxially on a one-piece inner ring 8.
  • the cylindrical bore 10 of this inner ring 8 is the axial continuation of the diameter of the pressing pin receiver bore 9 and thus corresponds to the diameter of the punch 13.
  • the cooling ring 12 are all over Annular ring-shaped and evenly distributed several, in the axial direction extending pairs of holes 14, 15, the mutual distance on their inner pitch circle 15-50 mm, depending on the diameter of the bore 9.
  • Each pair of holes 14, 15 is close to the inside of the cooling ring 12 its end facing away from the die each flow-connected through a radial bore 16.
  • These radial bores 16 are each closed at their outer ends by a plug 17. This results in a circulation for the cooling medium inside the cooling ring 12, the cooling medium not coming into direct contact with the material to be pressed 1.
  • the pairs of holes 14, 15 are each connected to a feed line or return line, which are each in an annular housing 18.
  • annular housing there are two concentric annular chambers 27, 28 with different diameters on the end face 6 of the cooling ring 12, with all of the openings of the bores 14 lying radially outside and the other all openings of the bores 15 being radially further into the other lie inside, flow into.
  • 18 connecting nipples 29 are provided in the annular housing for connecting pipe or hose lines.
  • a controllable throttle valve V is preferably installed, with which the flow and thus the cooling capacity can be continuously adapted to the requirements so that the temperature of the pressed material 1 in the forming zone can be kept at its optimal temperature level, for example using of a temperature sensor. If, for reasons of space, the preferred arrangement of the supply and discharge of the cooling medium at the die-side end of the cooling ring is not possible for existing presses, the lines for supply and discharge of the cooling medium can also be designed as radial bores on the pressing pin receiver side.
  • the cooling medium can be water, but other liquids, vapors or gases can also be used.
  • the die rests on the face against the cooling ring 12 and the inner ring 8.
  • the axial length of the cooling ring 12 is preferably 0.25-2 times the diameter of the press pin bore 9.
  • the wall thickness of the ring 8 is less than half the wall thickness of the cooling ring 12.
  • the wall thickness is Ring 8 preferably less than 1/4 of the diameter of the press pin bore 9.
  • the radially innermost, approximately horizontal axes of the cooling bores 15 are arranged on a ring, the diameter of which is less than 1 1/2 times, preferably less than 1 1/4 times of the diameter of the press pin receiver bore 9.
  • a radially outer shrunk-on pressure ring 20 surrounds the cooling ring 12 on the outside. It is fastened with screws 24 to the end face 32 of the press pin receiver 2. For reasons of strength, it is also possible to provide a plurality of pressure rings 20 lying coaxially one above the other, which are shrunk onto one another. The cooling ring 12 is also shrunk onto the inner ring 8. For the transmission of axial forces, the inner ring 8 and the cooling ring 12 and the pressure ring 20 are each provided with ring shoulders 11 and 22, respectively. Instead of ring shoulders, the rings 8, 12, 20 could also be conical on their interlocking parts.
  • FIG. 3 an embodiment is shown in which the cooling ring 12 ⁇ is formed with the omission of the inner ring 8 directly as the same diameter coaxial limitation of the die-near press pin bore 9. At least one pressure ring 20 is shrunk onto the contact ring 12 auf in a coaxial arrangement. Otherwise, the same reference numerals correspond to the same parts and the same functions as in the exemplary embodiment according to FIGS. 1 and 2.
  • the inner ring 8 and / or the cooling ring 12, 12 'to be conical over part of its length in the region on the die side, but the entry-side end of the bore 10 being of the same diameter as the press bolt bore 9.
  • the forming and frictional heat can thus be dissipated directly from the main forming zone in front of the press die 3 by cooling in order to keep the temperature of the pressed material 1 at an optimal level. This enables a sudden increase in the pressing speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Magnetic Heads (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP88810090A 1987-03-02 1988-02-15 Vorrichtung zum Kühlen einer Leichtmetall-Strangpresse Expired - Lifetime EP0281515B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88810090T ATE92799T1 (de) 1987-03-02 1988-02-15 Vorrichtung zum kuehlen einer leichtmetallstrangpresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH78487 1987-03-02
CH784/87 1987-03-02

Publications (3)

Publication Number Publication Date
EP0281515A2 EP0281515A2 (de) 1988-09-07
EP0281515A3 EP0281515A3 (en) 1990-08-29
EP0281515B1 true EP0281515B1 (de) 1993-08-11

Family

ID=4195107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810090A Expired - Lifetime EP0281515B1 (de) 1987-03-02 1988-02-15 Vorrichtung zum Kühlen einer Leichtmetall-Strangpresse

Country Status (7)

Country Link
US (1) US4829802A (no)
EP (1) EP0281515B1 (no)
JP (1) JPS63230221A (no)
AT (1) ATE92799T1 (no)
CA (1) CA1317910C (no)
DE (1) DE3883027D1 (no)
NO (1) NO167264C (no)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2735171B2 (ja) * 1993-12-27 1998-04-02 本田技研工業株式会社 軽合金の押出し加工方法
JPH07284841A (ja) * 1994-04-12 1995-10-31 Yano Eng:Kk 押出用ホローダイス及びコンフォーム押出装置
US5894751A (en) * 1997-03-11 1999-04-20 Bourgoine; Jeffrey J. Shroud canister
NO316161B1 (no) 1998-11-23 2003-12-22 Norsk Hydro As Anordning ved kjöleutstyr for kjöling av pressbolt
US6349688B1 (en) 2000-02-18 2002-02-26 Briggs & Stratton Corporation Direct lever overhead valve system
KR100366856B1 (ko) * 2000-12-06 2003-01-09 표문기 열전도 냉각형 슬리브
US6598451B2 (en) 2001-11-02 2003-07-29 Sequa Can Machinery, Inc. Internally cooled tool pack
US20040069036A1 (en) * 2002-10-09 2004-04-15 Klil Industries Ltd. Extruder and method of extrusion
SE529456C2 (sv) * 2005-11-21 2007-08-14 Iut Ind Ugnsteknik Ab Förfarande vid temperaturbehandling av strängpressningsverktyg
BR112015014954A8 (pt) 2012-12-21 2019-10-15 Exco Tech Limited recipiente para prensa de extrusão e manto para o mesmo
CN103143586B (zh) * 2013-03-06 2015-07-15 佛山市三水凤铝铝业有限公司 一种铝型材挤压模具的液氮冷却方法及装置
CN103817166B (zh) * 2014-02-28 2016-08-24 金川集团股份有限公司 一种水冷挤压模套及其制作方法
CN106694595B (zh) * 2017-01-24 2018-06-19 四川阳光坚端铝业有限公司 一种铝型材等温挤压系统及其挤压方法
CN108480413B (zh) * 2018-05-16 2019-11-29 河南大润新材料有限公司 一种铝型材挤压成型模具冷却机构
CN111235500B (zh) * 2020-02-28 2024-08-09 株洲中车天力锻业有限公司 一种铝合金环去应力装置
CN112642874A (zh) * 2020-12-04 2021-04-13 马鞍山市华冶铝业有限责任公司 一种加热式工业铝型材挤出模具

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429376C (de) * 1922-10-14 1926-05-25 Siemens & Halske Akt Ges Verfahren zum Strangpressen von Metallen und Legierungen
US2135193A (en) * 1935-04-12 1938-11-01 Aluminum Co Of America Extrusion
FR980781A (fr) * 1943-03-03 1951-05-17 Duralumin Soc Du Perfectionnement au filage à chaud des métaux
US3042195A (en) * 1957-12-18 1962-07-03 Hydraulik Gmbh Receiver for metal extrusion presses and like power-driven machines
US3112828A (en) * 1959-02-09 1963-12-03 Fred L Hill Extrusion dies
US3364707A (en) * 1965-02-16 1968-01-23 Dow Chemical Co Extrusion forming member and method
US3369385A (en) * 1965-07-07 1968-02-20 Reynolds Metals Co Metal extrusion apparatus
US3360975A (en) * 1965-12-16 1968-01-02 Babcock & Wilcox Co Water cooled container for hot working metal
CH540076A (de) * 1971-03-18 1973-08-15 Alusuisse Verfahren und Vorrichtung zum Strangpressen von Werkstücken insbesondere aus Aluminiumlegierungen
JPS5319160A (en) * 1976-08-06 1978-02-22 Hitachi Metals Ltd Internal cooling container
US4462234A (en) * 1980-06-19 1984-07-31 Battelle Development Corporation Rapid extrusion of hot-short-sensitive alloys
JPS5731408A (en) * 1980-06-19 1982-02-19 Battelle Development Corp Double extruding die and its extruding method
DE3527864A1 (de) * 1985-08-02 1987-02-05 Linde Ag Verfahren zum strangpressen bzw. strangziehen

Also Published As

Publication number Publication date
NO880898L (no) 1988-09-05
CA1317910C (en) 1993-05-18
NO167264B (no) 1991-07-15
US4829802A (en) 1989-05-16
JPS63230221A (ja) 1988-09-26
EP0281515A3 (en) 1990-08-29
EP0281515A2 (de) 1988-09-07
DE3883027D1 (de) 1993-09-16
NO880898D0 (no) 1988-03-01
ATE92799T1 (de) 1993-08-15
NO167264C (no) 1991-10-23
JPH0436765B2 (no) 1992-06-17

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