EP3838434B1 - Presse d'extrusion - Google Patents

Presse d'extrusion Download PDF

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Publication number
EP3838434B1
EP3838434B1 EP20214124.8A EP20214124A EP3838434B1 EP 3838434 B1 EP3838434 B1 EP 3838434B1 EP 20214124 A EP20214124 A EP 20214124A EP 3838434 B1 EP3838434 B1 EP 3838434B1
Authority
EP
European Patent Office
Prior art keywords
extruder
pressure
counter
cylinder
run
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.)
Active
Application number
EP20214124.8A
Other languages
German (de)
English (en)
Other versions
EP3838434A1 (fr
Inventor
Uwe Philipp Unterschütz
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.)
Unterschuetz Sondermaschinenbau GmbH
Original Assignee
Unterschuetz Sondermaschinenbau 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.)
Filing date
Publication date
Application filed by Unterschuetz Sondermaschinenbau GmbH filed Critical Unterschuetz Sondermaschinenbau GmbH
Publication of EP3838434A1 publication Critical patent/EP3838434A1/fr
Application granted granted Critical
Publication of EP3838434B1 publication Critical patent/EP3838434B1/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 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
    • B21C23/212—Details
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/26—Extrusion presses; Dies therefor using press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides

Definitions

  • the invention relates to an extrusion press with the features mentioned in the preamble of claim 1.
  • Extruders of the generic type have a press frame which is formed by a cylinder beam, a counter beam and tie rods connecting the cylinder beam and counter beam.
  • the side of the extruder that accommodates a hydraulically or electrically driven press cylinder is referred to as the cylinder beam.
  • the side of the extrusion press on which a block to be pressed, usually a metal block, is arranged in a corresponding holder (recipient) is called the counter beam.
  • a die that determines the profile to be pressed is assigned to the pickup in a known manner.
  • Such extrusion presses are used, for example, to shape aluminum.
  • Aluminum/aluminum alloy billets produced in continuous casting are preheated and placed in the receiver of the extrusion press.
  • This recipient ends with the die, which is usually made of high-strength steel and has an opening corresponding to the profile.
  • the bolt With a pressure of 750 and more N/mm 2 the bolt is then pressed through the die opening by means of a punch, so that a strand with the desired profile is created.
  • the high pressures that occur during extrusion must be absorbed by the tie rods.
  • the tie rods are subjected to a stretching force that leads to changes in the length of the tie rods.
  • the pressure columns gripping the tie rods between the cylinder beam and the counter beam have play, which can result in a highly precise horizontal and vertical alignment of the extruder not being able to be ensured.
  • a displacement of the cylinder beam and counter beam relative to one another can no longer be adequately absorbed by the existing clearance between the pressure columns and the cylinder beam or counter beam. This affects the dimensional tolerances of the press strands to be produced.
  • the invention is based on the object of creating an extrusion press of the generic type in which play in pressure columns that occurs due to pressing forces can be compensated for in a simple manner.
  • the pressure columns each include at least one pressure piece, which can be adjusted to be variable in length in the longitudinal direction of the pressure columns, is advantageously possible at any time to compensate for any play between the pressure columns and cylinder beam or counter beam that occurs when the extruder is started up or during operation. This play compensation can be done at any time without dismantling components of the entire extrusion press. Due to the fact that the pressure pieces are also arranged between the cylinder beam and the counter beam, no additional installation space is required for the extrusion press.
  • the pressure pieces can be continuously adjusted in length. This allows a very precise adjustment to be made in a simple manner for the purpose of compensating for play between the pressure columns and the cylinder beam or counter beam.
  • the pressure piece has two clamping disks which are connected to one another in a form-fitting manner and which encompass the tie rods. This enables the pressure pieces to be arranged in a particularly simple manner.
  • the outside diameter of the clamping disks essentially corresponds to the outside diameter of the pressure columns and accommodates the tie rod on the inside.
  • the clamping disks have coaxial guide webs which engage in corresponding guide grooves of the pressure columns on the one hand and of the cylinder beam or the counter beam on the other hand. This enables a precise, centered arrangement of the pressure pads.
  • the end faces of the clamping disks facing one another have corresponding ramp surfaces, which preferably have a self-locking gradient. This advantageously makes it possible to achieve the length variability of the pressure piece by simply twisting the clamping disks relative to one another. Due to the self-locking incline of the ramp surfaces, an automatic reset of the clamping disks due to axially acting forces is not possible. The equalizer is thus surely achieved during the operation of the extruder.
  • the clamping disks each have four contact surfaces, which each preferably cover 90° viewed in the circumferential direction of the clamping disks and which more preferably have a pitch angle in the self-locking region.
  • FIG. 12 shows an extruder denoted overall by 10 in a schematic sectional view.
  • the extrusion press 10 comprises a cylinder beam 12 and a counter beam 14.
  • Cylinder beam 12 and counter beam 14 are connected to one another by tie rods 16 .
  • tie rods 16 As a rule, four tie rods 16 are provided. Cylinder beam 12, counter beam 14 and tie rod 16 together form a press frame 18.
  • a press cylinder 20 and a receiver (recipient) 22 are arranged inside the press frame 18 .
  • the receiver 22 is used to hold a block to be pressed, for example an aluminum bolt.
  • a die 24 is arranged between the pickup 22 and the counter beam 14 .
  • the press cylinder 20 has a press piston 26 .
  • the tie rods 16 are surrounded by pressure columns 28, which are on the one hand on the counter beam 14 and on the other hand supported on a pressure piece 30.
  • the pressure piece 30 in turn is based on the
  • extruder 10 shown shows the following function: A block to be pressed, for example a bolt made of aluminum or aluminum alloy, is introduced into the receiver 22 . This is optionally heated beforehand. By means of the press cylinder 20, which can be driven hydraulically or electrically, the press bolt 26 is pressed onto the material block to be pressed. The material of the block is in this case in a flow state and is pressed through the die opening of the die 24 and emerges as a strand on the side of the extruder 10 indicated here by the arrow 32 .
  • the cylinder beam 12 and the counter beam 14 are held in position by means of the tie rods 16 .
  • the high pressing forces which can amount to 750 N/mm 2 and more, have to be absorbed.
  • pressure pieces 30 are assigned to each of the tie rods 16 .
  • two pressure pieces 30 can also be provided for each tie rod. In this case, this means that they are arranged in contact with both the cylinder beam 12 and the counter beam 14 .
  • the pressure piece 30 is arranged approximately in the middle and the pressure columns 28 are thus divided into two sections, one of which is assigned to the cylinder beam 12 and the other to the counter beam 14 .
  • FIG 2 the arrangement of a pressure piece 30 in the extruder 10 is first shown in an enlarged detail. Same parts as in figure 1 are provided with the same reference symbols and are not explained again. It becomes clear that the pressure piece 30 consists of two clamping disks 34 and 36 . An outside diameter of the clamping disks 34 and 36 essentially corresponds to the outside diameter of the pressure columns 28. An inside diameter of the clamping disks 34 and 36 essentially corresponds to the outer diameter of the tie rods 14.
  • the clamping disk 34 has a coaxial guide web 38 which engages in a corresponding groove 40 of the cylinder spar 12 .
  • the clamping disk 36 has a coaxial guide web 42 which engages in a corresponding groove 44 of the pressure column 28 .
  • the clamping disks 34 and 36 have end faces 46 and 48 facing one another.
  • the clamping disks 34 and 36 also form a common annular groove 50 within which an annular spring 52 is arranged.
  • FIG 3 the pressure piece 30 is shown in an enlarged perspective view. Same parts as in figure 2 are provided with the same reference symbols and are not explained again. Based on figure 3 it becomes clear that the clamping discs 34 and 36 of the pressure piece 30 are rotationally symmetrical. These have the inner through opening 54 for receiving the tie rod 16 ( figure 2 ) on.
  • the clamping disc 34 is shown individually. This makes it clear that it has four ramp surfaces 56 distributed uniformly over the circumference on its end face 46 . Each of the ramp surfaces 56 extends over an angular range of approximately 90°. The ramp surfaces 56 each have an incline, so that they extend from a base 58 to an end point 60 . The end point 60 has an axial distance X to the end face 46, so that in the region of the end point 60 to the base 58 of the adjoining ramp surface 56 there is a step 62. The height of the step 62 determines the gradient of the run-on surface 56. The height of the step, ie the distance X, is selected here in such a way that a gradient angle results in the area of self-locking.
  • the clamping disk 36 has on its end face 48 corresponding ramp surfaces 56 of the clamping disk 34 .
  • the run-on surfaces of the clamping disks 34 and 36 are thus in contact with one another.
  • the clamping disks 34 and 36 are arranged relative to one another in such a way that the smallest possible gap dimension results between the end faces 46 and 48 .
  • pressure piece 30 shows the following functions: in figure 1
  • the initial state of the extruder 10 shown in the figure results in a form fit between the cylinder beam 12 and the counter beam 14 via the pressure piece 30 and the pressure columns 28.
  • a non-positive connection between the cylinder beam 12 and the counter beam 14 is provided by the tie rods 16, which are firmly braced by clamping nuts 64 on the side facing away from the pressure column 28.
  • the tie rods 16 are subjected to a certain stretching due to the inherent material properties, so that a certain amount of play occurs between the pressure columns 28 and the cylinder beam 12 or counter beam 14 .
  • the pressure pads 30 are now provided.
  • the ramp surfaces of the clamping disks 34 and 36 that are in contact with the system act as guide surfaces.
  • the clamping disks 34 and 36 thus remain in form-fitting contact, but the gap between the clamping disks 34 and 36 increases. This enlargement of this gap leads to compensation of the play between pressure column 28 and cylinder beam 12 or counter beam 14. Continuous adjustment is possible due to the design of the ramp surfaces.
  • the pressure pieces 30 are thus adjustable in length in the longitudinal direction of the pressure column 28 . This adjustment takes place to such an extent that there is again a positive fit between the cylinder beam 12 and the counter beam 14 via the pressure piece 30 and the pressure column 28 .
  • the selected slope of the run-up surfaces is chosen so that self-locking occurs. This means that when an axial force occurs on the clamping disks 34 and 36, they do not change their distance. In particular, this does not result in the clamping disks 34 and 36 rotating back relative to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Claims (9)

  1. Presse d'extrusion (10) pourvue d'un montant cylindrique (12), d'un contre-montant (14) et d'au moins un tirant (16) reliant ceux-ci pour former un cadre de presse (18), d'une colonne de pression (28) entourant le tirant, laquelle est disposée entre le montant cylindrique (12) et le contre-montant (14),
    caractérisée en ce que
    la colonne de pression (28) comprend respectivement au moins une pièce de pression (30), qui peut être réglée de façon à en modifier la longueur dans le sens de la longueur de la colonne de pression (28).
  2. Presse d'extrusion (10) selon la revendication 1,
    caractérisée en ce que
    la pièce de pression (30) présente deux disques tendeurs (34, 36) reliés l'un à l'autre par complémentarité de forme, lesquels encerclent les tirants (16).
  3. Presse d'extrusion (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que
    les pièces de pression (30) peuvent être réglées en continu de façon à en modifier la longueur.
  4. Presse d'extrusion (10) selon la revendication 2,
    caractérisée en ce que
    les faces frontales (46, 48) orientées l'une vers l'autre des disques tendeurs (34, 36) possèdent des surfaces de contact (56) correspondantes.
  5. Presse d'extrusion (10) selon la revendication 4,
    caractérisée en ce que
    les surfaces de contact (56) présentent une inclinaison autobloquante.
  6. Presse d'extrusion (10) selon la revendication 4,
    caractérisée en ce que
    les disques tendeurs (34, 36) présentent respectivement quatre surfaces de contact (56).
  7. Presse d'extrusion (10) selon la revendication 6,
    caractérisée en ce que
    les surfaces de contact (56) s'étendent respectivement sur un angle de 90°.
  8. Presse d'extrusion (10) selon la revendication 4,
    caractérisée en ce que
    les surfaces de contact (56) présentent un angle d'inclinaison dans la zone du blocage automatique.
  9. Presse d'extrusion (10) selon la revendication 2,
    caractérisée en ce que
    les disques tendeurs (34, 36) présentent des nervures de guidage (38, 42), qui coopèrent avec des rainures de guidage (40, 44) correspondantes de la colonne de pression (28) et du montant cylindrique (12) et/ou du contre-montant (14).
EP20214124.8A 2019-12-16 2020-12-15 Presse d'extrusion Active EP3838434B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019134506.5A DE102019134506B3 (de) 2019-12-16 2019-12-16 Strangpresse

Publications (2)

Publication Number Publication Date
EP3838434A1 EP3838434A1 (fr) 2021-06-23
EP3838434B1 true EP3838434B1 (fr) 2022-04-06

Family

ID=73838983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20214124.8A Active EP3838434B1 (fr) 2019-12-16 2020-12-15 Presse d'extrusion

Country Status (3)

Country Link
EP (1) EP3838434B1 (fr)
DE (1) DE102019134506B3 (fr)
ES (1) ES2912198T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577759A (en) * 1968-03-13 1971-05-04 Cerro Corp Method of and apparatus for preparing copper and brass billets for extrusion into hollow shells
DE19500555C1 (de) * 1995-01-11 1996-08-22 Hasenclever Maschf Sms Liegende Metallstrangpresse
WO2013064250A1 (fr) * 2011-10-31 2013-05-10 Sms Meer Gmbh Procédé de production de produits métalliques filés ainsi que presse à filer pour produits pleins et tubulaires
ITMI20120053A1 (it) * 2012-01-19 2013-07-20 Danieli Off Mecc Pressa di estrusione diretta per prodotti metallici
CN106391742A (zh) * 2016-11-21 2017-02-15 考迈托（佛山）挤压科技股份有限公司 一种挤压机拉杆结构及安装方法
CN109604362A (zh) * 2018-11-21 2019-04-12 中国重型机械研究院股份公司 一种预应力框架的静液挤压机结构

Also Published As

Publication number Publication date
EP3838434A1 (fr) 2021-06-23
ES2912198T3 (es) 2022-05-24
DE102019134506B3 (de) 2021-03-25

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