EP3838434A1 - Presse d'extrusion - Google Patents

Presse d'extrusion Download PDF

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Publication number
EP3838434A1
EP3838434A1 EP20214124.8A EP20214124A EP3838434A1 EP 3838434 A1 EP3838434 A1 EP 3838434A1 EP 20214124 A EP20214124 A EP 20214124A EP 3838434 A1 EP3838434 A1 EP 3838434A1
Authority
EP
European Patent Office
Prior art keywords
spar
extrusion press
pressure
cylinder
counter
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
EP20214124.8A
Other languages
German (de)
English (en)
Other versions
EP3838434B1 (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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 extruder with the features mentioned in the preamble of claim 1.
  • Extrusion presses of the generic type have a press frame which is formed by a cylinder spar, an opposing spar and tie rods connecting the cylinder spar and the opposing spar.
  • the side of the extrusion press that receives a press cylinder that is usually hydraulically or electrically driven is referred to as the cylinder spar.
  • the side of the extrusion press on which a block to be pressed, usually a metal block, is arranged in a corresponding receptacle, is referred to as the counter bar.
  • a die which determines the profile to be pressed is assigned to the pick-up in a known manner.
  • Such extrusions are used, for example, to reshape aluminum.
  • Bolts made of aluminum / aluminum alloy produced in continuous casting are preheated and placed in the receiver of the extrusion press. This recipient is closed with the die, which is usually made of high-strength steel and carries the opening corresponding to the profile. 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 invention is based on the object of creating an extrusion press of the generic type in which a play of 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 that can be adjusted in length in the longitudinal direction of the pressure columns, it is advantageously possible to compensate for any play between the pressure columns and the cylinder spar or counter spar that occurs during commissioning or operation of the extrusion press. This compensation of play can take place at any time without dismantling components of the entire extrusion press. Because the pressure pieces are also arranged between the cylinder spar and the counter spar, additional installation space is not required for the extrusion press.
  • the pressure pieces are continuously adjustable in length. In this way, a very precise adjustment can be made in a simple manner for the purpose of compensating for play between the pressure columns and the cylinder spar or counter spar.
  • the pressure piece has two tensioning disks which are positively connected to one another and which grip around the tie rods. This enables the pressure pieces to be arranged in a particularly simple manner.
  • the outside diameter of the tension washers corresponds essentially to the outside diameter of the pressure columns and they hold the tie rod inside.
  • the tensioning disks have coaxial guide webs which engage in corresponding guide grooves of the pressure columns on the one hand and of the cylinder spar or the counter spar on the other. This enables an exact, centered arrangement of the pressure pieces.
  • the mutually facing end faces of the tensioning disks have corresponding run-up surfaces, which preferably have a self-locking slope. This advantageously makes it possible to achieve the variability in length of the pressure piece by simply turning the tensioning disks relative to one another. Due to the self-locking slope of the run-on surfaces, automatic resetting of the tensioning disks due to axially acting forces is not possible. The backlash compensation is thus achieved safely during operation of the extruder.
  • the tensioning disks each have four run-up surfaces which each preferably cover 90 ° in the circumferential direction of the tensioning disks and which further preferably have a pitch angle in the area of self-locking.
  • Such a configuration achieves a secure tilt-free adjustment of the pressure pieces with ensured self-locking.
  • Figure 1 shows an extrusion press designated as a whole by 10 in a schematic sectional view.
  • the extrusion press 10 comprises a cylinder spar 12 and a counter bar 14.
  • the cylinder bar 12 and counter bar 14 are connected to one another by tie rods 16.
  • tie rods 16 As a rule, four tie rods 16 are provided.
  • the cylinder spar 12, counter spar 14 and tie rod 16 together form a press frame 18.
  • a press cylinder 20 and a receiver 22 are arranged within the press frame 18.
  • the receptacle 22 serves to receive a block to be pressed, for example an aluminum bolt.
  • a die 24 is arranged between the pick-up 22 and the counter member 14.
  • the press cylinder 20 has a press piston 26.
  • the tie rods 14 are surrounded by pressure columns 28, which are on the one hand on the counter member 14 and on the other hand, support on a pressure piece 30.
  • the pressure piece 30 in turn is supported on the cylinder spar 12.
  • the extrusion press 10 shown has the following function: A block to be pressed, for example a bolt made of aluminum or an aluminum alloy, is introduced into the receiver 22. This is heated beforehand if necessary. 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 here changes into 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 designated here by the arrow 32.
  • the cylinder spar 12 and the counter spar 14 are held in position by means of the tie rods 14.
  • 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. That is to say in this case they are arranged in contact with both the cylinder spar 12 and the counter spar 14.
  • the pressure piece 30 is arranged approximately in the middle and thus the pressure columns 28 are divided into two sections, one of which is assigned to the cylinder spar 12 and the other to the counter spar 14.
  • FIG 2 the arrangement of a pressure piece 30 in the extrusion press 10 is initially shown in an enlarged detail. Same parts as in Figure 1 are provided with the same reference symbols and are not explained again. It is clear that the pressure piece 30 consists of two tension disks 34 and 36. An outer diameter of the tensioning disks 34 and 36 corresponds essentially to the outer diameter of the pressure columns 28. An inner diameter of the tensioning disks 34 and 36 essentially corresponds to the outer diameter of the tie rods 14.
  • the tensioning disk 34 has a coaxial guide web 38 which engages in a corresponding groove 40 of the cylinder spar 12.
  • the tensioning 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 tension disks 34 and 36 also form a common annular groove 50 within which an annular spring 52 is arranged.
  • clamping disks 34 and 36 of the pressure piece 30 are designed to be rotationally symmetrical. These have the inner through opening 54 for receiving the ring anchor 14 ( Figure 2 ) on.
  • the tensioning disk 34 is shown individually. This makes it clear that it has four run-up 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 a slope so that they extend from a base 58 to an end point 60.
  • the end point 60 here has an axial distance X from the end face 46, so that a step 62 results in the area of the end point 60 to the base 58 of the adjoining run-up surface 56.
  • the height of the step 62 determines the slope of the run-up surface 56.
  • the height of the step that is to say the distance X, is selected here in such a way that a slope angle in the area of self-locking results.
  • the tensioning disk 36 On its end face 48, the tensioning disk 36 has bearing surfaces corresponding to the bearing surfaces 56 of the tensioning disk 34. The run-up surfaces of the clamping disks 34 and 36 thus rest against one another.
  • the tensioning disks 34 and 36 are arranged with respect to one another in such a way that the smallest possible gap is obtained between the end faces 46 and 48.
  • the explained pressure piece 30 shows the following functions:
  • the illustrated initial state of the extruder 10 results in a form fit between the cylinder spar 12 and the counter spar 16 via the pressure piece 30 and the pressure columns 28.
  • the cylinder spar 12 and the counter spar 14 are pushed apart and held in position by the tie rods 14.
  • the tie rods 14 are subjected to a certain stretching due to the inherent material properties, so that a certain amount of play is established between the pressure columns 28 and the cylinder spar 12 or counter spar 14.
  • the pressure pieces 30 are now provided.
  • the contact 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 system contact, but the gap between the clamping disks 34 and 36 increases. This enlargement of this gap leads to the compensation of the play between the pressure column 28 and the cylinder spar 12 or the counter spar 14.
  • the design of the run-on surfaces enables a stepless adjustment.
  • 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 form fit between the cylinder spar 12 and the opposing spar 14 via the pressure piece 30 and the pressure column 28.
  • the chosen slope of the run-up surfaces is chosen in such a way that self-locking occurs. This means that when an axial force occurs on the tensioning disks 34 and 36, they do not change their spacing. In particular, this means that the tensioning disks 34 and 36 are not turned back 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)
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 true EP3838434A1 (fr) 2021-06-23
EP3838434B1 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)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021527A1 (fr) 1995-01-11 1996-07-18 Sms Schloemann Gmbh Presse horizontale d'extrusion pour metal
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
EP2804705B1 (fr) * 2012-01-19 2016-03-30 Danieli & C. Officine Meccaniche SpA Presse pour extrusion directe de produits métalliques
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

Family Cites Families (1)

* 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021527A1 (fr) 1995-01-11 1996-07-18 Sms Schloemann Gmbh Presse horizontale d'extrusion pour metal
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
EP2804705B1 (fr) * 2012-01-19 2016-03-30 Danieli & C. Officine Meccaniche SpA Presse pour extrusion directe de produits métalliques
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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 2017-128494, XP002802860, "Extruder pull rod structure and installation method" *
DATABASE WPI Derwent World Patents Index; AN 2019-35913V, XP002802861, "Static liquid extruder structure of prestress framework" *

Also Published As

Publication number Publication date
ES2912198T3 (es) 2022-05-24
DE102019134506B3 (de) 2021-03-25
EP3838434B1 (fr) 2022-04-06

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