EP0623402A1 - Verfahren zum Strangpressen von Metall und Strangpresse - Google Patents

Verfahren zum Strangpressen von Metall und Strangpresse Download PDF

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Publication number
EP0623402A1
EP0623402A1 EP94400976A EP94400976A EP0623402A1 EP 0623402 A1 EP0623402 A1 EP 0623402A1 EP 94400976 A EP94400976 A EP 94400976A EP 94400976 A EP94400976 A EP 94400976A EP 0623402 A1 EP0623402 A1 EP 0623402A1
Authority
EP
European Patent Office
Prior art keywords
container
billet
housing
spinning
crosspiece
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.)
Granted
Application number
EP94400976A
Other languages
English (en)
French (fr)
Other versions
EP0623402B1 (de
Inventor
Guy Bessey
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.)
KVAERNER CLECIM
Original Assignee
Clecim SAS
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 Clecim SAS filed Critical Clecim SAS
Publication of EP0623402A1 publication Critical patent/EP0623402A1/de
Application granted granted Critical
Publication of EP0623402B1 publication Critical patent/EP0623402B1/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
    • B21C27/00—Containers for metal to be extruded
    • B21C27/04—Venting metal-container chamber

Definitions

  • the subject of the invention is a process for spinning a metal billet in a spinning press and also covers an improved spinning press for implementing the process.
  • an metal billet is generally extruded in a spinning press comprising, in general, a container limiting a tubular housing centered on a spinning axis closed at its ends by two closing pieces and in which is placed a billet of metal to be spun, one of said pieces being provided with a die.
  • the assembly is placed in a frame made up of two fixed crosspieces kept apart from one another by tie rods.
  • One of the closing parts is made up of a grain of the same diameter as the housing and placed at the end of a gland allowing its introduction into the housing under the action of a main spinning cylinder bearing on a fixed cross member, moving closer to the other closing part which bears on the other cross member.
  • the metal compressed between the two closure parts is extruded through the die in the form of a profile of the same section.
  • the container In the so-called direct spinning process, the container is fixed and bears directly, with the closure part carrying the die, on one of the fixed crosspieces.
  • the gland bearing the grain which constitutes the other closing part is actuated by the main spinning jack so as to make the grain penetrate into the housing of the container.
  • the die is mounted on a grain of diameter equal to that of the container housing and placed at the end of a tubular gland bearing on one of the fixed crosspieces.
  • the container is closed at its opposite end by a bottom and the assembly is mounted on a movable cross member actuated by the main extrusion cylinder, so that the housing threads on the grain by determining the extrusion by the die of the metal billet contained inside the housing , the extruded profile being removed by the tubular gland.
  • the metal billets are produced from very long pieces in which pieces having a length slightly shorter than that of the container housing are cut. Each piece has, on the other hand, a cross section slightly smaller than that of the container housing so as to provide, between the internal face of said housing and the external face of each billet, a clearance necessary for the introduction of the billet into housing.
  • this degassing is carried out by controlling, after precompression, a slight recoil of the container with the gland to allow the container to come off the bottom carrying the die, letting the compressed air escape into the housing .
  • auxiliary cylinders provided on the press are used for the operations isolated from the container and the return cylinders. of the main extrusion cylinder which normally is single acting.
  • the invention remedies these drawbacks by means of a new process which makes it possible to practically avoid the dead time which, until now, was necessary for degassing and, thus, to increase the productivity of the press. It is known, in fact, that the recent development of the technique leads to as continuous use as possible of the press while not neglecting any idle time, even short.
  • the invention is intended more specifically for direct spinning presses, but can also find applications in reverse spinning presses.
  • the invention therefore applies, in general, to the spinning of a metal billet in a spinning press comprising a container provided with a tubular housing centered on a spinning axis and in which the billet is placed, a first crosspiece on which the container is supported during spinning, two closure pieces at the two ends of the housing, respectively a bottom carried by a first crosspiece on which the container is supported and a thrust grain, of section substantially equal to that of housing, mounted at the end of a gland and capable of penetrating axially inside the housing, a die centered on the spinning axis and mounted on one of said closing parts, and means for controlling the approximation of these towards each other, by resting on a second crosspiece, for the spinning of the billet by extrusion in the die, the spinning operation being preceded a phase of precompression of the billet between the grain and the bottom to apply the external force against the wall of the housing.
  • the container is prevented from being applied to the bottom by maintaining, between the latter and the corresponding end of the container, a small clearance allowing the progressive evacuation of the air contained in the housing during the precompression of the billet and until the complete application thereof on the wall of the housing.
  • a spacing means capable of exerting on the container a calibrated retaining force directed in the opposite direction to the direction of penetration of the grain in the housing and the value of which is limited so that the spreading means yields under the pressure of the container, allowing the clearance to be removed and the bottom to be closed when the application of the billet on the wall of the housing is sufficient to secure the container with the billet.
  • a hydraulic pressure is relieved for a short time and at the end of the precompression phase in the spinning control means, which determines a slight decline in the billet with the container and the reopening of the bottom under the action of said spacing means, with instantaneous creation of a clearance allowing the escape of residual air.
  • the invention also covers an improved spinning press for implementing the method comprising means for retaining the container interposed between the first cross member and the corresponding end of the container and extending over a distance sufficient to allow it to remain, between said end of the container and the closure bottom, sufficient play to allow the evacuation of the air contained between the billet and the internal face of the housing.
  • said retaining means consist of at least two jacks arranged on either side of the spinning axis and bearing on one side on the first cross member and on the other on the corresponding end of the container.
  • the retaining jacks are associated with means for releasing the pressure when the latter exceeds a limit value.
  • a spinning press comprising two fixed crosspieces 1, 11, spaced from one another by a constant distance maintained by tie rods 12, and between which is mounted sliding a movable cross member 2 carrying a container 3 in which is formed a cylindrical housing 4 centered on a spinning axis 10.
  • the container 3 can move axially with the movable cross member 2 under the action of auxiliary jacks 21 bearing on the fixed cross member 11.
  • the container 3 can thus be applied against a part 13 forming a closure bottom of the corresponding end 41 of housing 4, on which is mounted a die 14 centered on the spinning axis 10.
  • the end 42 of the housing 4 is closed by a thrust grain 5 mounted at the end of an elongated gland 51 fixed on the piston 52 of a main spinning cylinder whose body 53 is formed in the fixed cross member 11.
  • a metal billet 6, of diameter slightly smaller than that of the housing 4, is placed inside the latter and the container is advanced by the auxiliary jacks 21 towards the die-holding part 13 which closes the 'corresponding end 41 of the housing 4.
  • the gland 51 is pushed by the main jack 52 or else under the action of auxiliary jacks not shown, so that the thrust grain 5, which has a roughly identical cross section, to that of the housing 4, enters the corresponding end 42 thereof, and bears against the corresponding face of the billet 6 which is refined, itself on the bottom.
  • the container 3 is applied, by its front face 31, against the closure bottom 13 and the air contained in the existing set, originally, between the billet 6 and the housing 4, is compressed by the swelling of the billet 6.
  • the container 43 is prevented from applying by its face 31 against the die holder part 13 by means of jacks 7 which are interposed between the fixed cross member 1 and the container 3 or the cross member mobile 2.
  • jacks 7 which are interposed between the fixed cross member 1 and the container 3 or the cross member mobile 2.
  • two jacks 7, 7 ′ are used, the body 71 of which is fixed to the fixed cross member 1 and the rod 72 of which comes to bear against the mobile cross member 2.
  • the length of the rods 72 is determined so that, in the extended position of the jacks 7, 7 ′, there is a slight clearance (e) between the front face 31 of the container 3 and the corresponding face 15 of the die holder part. 13.
  • the movable cross member 2 After having loaded the billet 6 in the housing 4 of the container 3, by well known means, the movable cross member 2 is advanced by means of the auxiliary jacks 21 until it comes to bear on the jacks 7, 7 'which are in the fully extended position. In this position, the front face 31 of the container is therefore at a short distance (e) from the die holder part 13.
  • the grain 5 is then advanced under the action of the main cylinder 52 and the billet 6 is applied, by its front face 60, against the die holder bottom 13 and then begins to inflate.
  • the air contained between the internal face 43 of the housing 4 and the external face 61 of the billet escapes progressively through the clearance (e) as the billet 6 swells.
  • each cylinder 7 (7 ′) is calibrated so as to resist the advancement of the container only up to a certain limit of the pressure applied to the billet, from which the metal could seep into the game (e). From this limit, the friction between the billet 6 and the internal face 43 of the housing 4 is such that the container 3 is sufficiently secured to the grain 5 to repel the jacks 7, 7 ′ which yield under the applied thrust, allowing the advancement of the container 3 until its front face 31 comes to bear against the corresponding face 15 of the die holder part 13 by completely closing the end 41 of the housing 4.
  • the second degassing step which, moreover, may not always be essential, it is carried out automatically and almost instantaneously under the action of the jacks 7, 7 ′ maintained in pressure as soon as a trigger is ordered in the main cylinder 54.
  • This is an essential advantage compared to the arrangements used until now, in which the air was allowed to compress in the container during the decompression phase, the degassing being carried out then by controlling the recoil of the container by means of the auxiliary cylinders 21 or else the return cylinders of the main cylinder (not shown in the Figure).
  • Such recoil requires different hydraulic maneuvers which are eliminated in the process according to the invention, which makes it possible to improve productivity by avoiding the corresponding dead time.
  • the invention can also be implemented by a very simple device, which comprises only two jacks 7, 7 'supplied by a hydraulic circuit 74 under a limited pressure, for example, by a calibrated valve 73 whose adjustment can be determined taking into account the characteristics of the press, the nature of the metal and the pressure from which it could escape through the clearance (e) left between the container (3) and the die holder (13).
  • the container in a reverse spinning press, the container is mobile and slides onto the gland which is fixed and carries, at its end, a grain on which the die is mounted and which penetrates into the front end of the housing.
  • the main spinning actuator actuates a mobile crossmember which carries a bottom closing the container and bears on it to push it towards the fixed crossmember carrying the gland, the spun product being discharged through an orifice provided in the axis of the gland.
  • the container retaining jacks would then be placed on the movable cross member to rest on the rear face of the container and prevent the application of the latter against the movable cross member, leaving a clearance between the container and the closure bottom.
  • the gradual evacuation of the air as precompression and until the pressure of application of the billet against the internal face of the housing is such that the container is sufficiently integral with the latter so that the retaining jacks yield while letting the play close.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP94400976A 1993-05-06 1994-05-04 Verfahren zum Strangpressen von Metall und Strangpresse Expired - Lifetime EP0623402B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305463A FR2704783B1 (fr) 1993-05-06 1993-05-06 Procede de filage de metal et presse a filer perfectionnee.
FR9305463 1993-05-06

Publications (2)

Publication Number Publication Date
EP0623402A1 true EP0623402A1 (de) 1994-11-09
EP0623402B1 EP0623402B1 (de) 1997-08-06

Family

ID=9446862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400976A Expired - Lifetime EP0623402B1 (de) 1993-05-06 1994-05-04 Verfahren zum Strangpressen von Metall und Strangpresse

Country Status (6)

Country Link
US (1) US5613393A (de)
EP (1) EP0623402B1 (de)
JP (1) JPH0775823A (de)
DE (1) DE69404732T2 (de)
ES (1) ES2105552T3 (de)
FR (1) FR2704783B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100265362B1 (ko) 1997-12-30 2000-09-15 김영환 직병렬 방식을 이용한 마이크로프로세서의 데이터송수신 방법
US5896772A (en) * 1998-02-19 1999-04-27 Ube Industries, Ltd. Extruder
CN100360252C (zh) * 2002-04-30 2008-01-09 机械工业部西安重型机械研究所 双动挤压机穿孔控制系统
US7591163B2 (en) 2006-03-30 2009-09-22 Ube Machinery Corporation, Ltd. Extrusion molding method and apparatus of extrusion press
JP2009166081A (ja) * 2008-01-16 2009-07-30 Ube Machinery Corporation Ltd 押出プレスの排気押出方法
IT1391753B1 (it) * 2008-11-03 2012-01-27 Danieli Off Mecc Apparato e procedimento di comando della movimentazione del contenitore in una pressa per estrusione
US20120096915A1 (en) * 2010-10-25 2012-04-26 General Electric Company System and method for near net shape forging
JP5834611B2 (ja) * 2011-08-09 2015-12-24 宇部興産機械株式会社 押出プレス
JP5831742B2 (ja) * 2011-08-11 2015-12-09 宇部興産機械株式会社 押出プレス装置
JP5834643B2 (ja) * 2011-09-05 2015-12-24 宇部興産機械株式会社 押出プレス及び押出プレスの制御方法
CN116727476B (zh) * 2023-08-15 2023-11-07 中北大学 一种镁合金尾翼径向同步加载成形方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0531612A1 (de) * 1991-09-13 1993-03-17 INNSE INNOCENTI ENGINEERING S.p.A. Verfahren zum Ausblasen der zwischen Matrize und Knüppel eingesperrten Luft in einer Strangpresse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935286A (en) * 1930-09-30 1933-11-14 Krupp Ag Grusonwerk Extrusion press for the production of rod or tube-shaped bodies
US2822087A (en) * 1953-10-21 1958-02-04 Lorant Hugo Extrusion process
US5445004A (en) * 1993-11-24 1995-08-29 Breda Danieli Extrusion Extrusion method with gas evacuation, and extrusion press

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0531612A1 (de) * 1991-09-13 1993-03-17 INNSE INNOCENTI ENGINEERING S.p.A. Verfahren zum Ausblasen der zwischen Matrize und Knüppel eingesperrten Luft in einer Strangpresse

Also Published As

Publication number Publication date
FR2704783A1 (fr) 1994-11-10
ES2105552T3 (es) 1997-10-16
DE69404732T2 (de) 1998-01-22
JPH0775823A (ja) 1995-03-20
DE69404732D1 (de) 1997-09-11
EP0623402B1 (de) 1997-08-06
US5613393A (en) 1997-03-25
FR2704783B1 (fr) 1995-07-28

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