EP3838434A1 - Extruder - Google Patents
Extruder Download PDFInfo
- 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
Links
- 238000001125 extrusion Methods 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 241000251131 Sphyrna Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Die Erfindung betriff eine Strangpresse (10) mit einem Zylinderholm (12), einem Gegenholm (14) und mindestens einen diese zu einem Pressrahmen (18) verbindenden Zuganker (16), eine den Zuganker umgebende Drucksäule (28), die zwischen dem Zylinderholm (12) und dem Gegenholm (14) angeordnet ist.Es ist vorgesehen, dass die Drucksäule (28) jeweils zumindest ein Druckstück (30) umfasst, das in Längsrichtung der Drucksäule (28) längenveränderlich einstellbar ist.The invention relates to an extrusion press (10) with a cylinder spar (12), a counter spar (14) and at least one tie rod (16) connecting them to a press frame (18), a pressure column (28) surrounding the tie rod, which is positioned between the cylinder pillar ( 12) and the counter spar (14). It is provided that the pressure column (28) each comprises at least one pressure piece (30) which can be adjusted in length in the longitudinal direction of the pressure column (28).
Description
Die Erfindung betrifft eine Strangpresse mit den im Oberbegriff des Anspruchs 1 genannten Merkmalen.The invention relates to an extruder with the features mentioned in the preamble of claim 1.
Strangpressen der gattungsgemäßen Art sind bekannt. Diese besitzen einen Pressrahmen, der von einem Zylinderholm, einem Gegenholm und von Zylinderholm und Gegenholm verbindende Zuganker gebildet wird. Als Zylinderholm wird die Seite der Strangpresse bezeichnen, die einen in der Regel hydraulisch oder elektrisch antreibbaren Presszylinder aufnimmt. Als Gegenholm wird die Seite der Strangpresse bezeichnet, an der ein zu verpressender Block, in der Regel Metallblock in einem entsprechenden Aufnehmer (Rezipient) angeordnet ist. Ferner ist dem Aufnehmer in bekannter Weise noch eine das zu pressende Profil bestimmende Matrize zugeordnet.Extrusion presses of the generic type are known. These 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. In addition, a die which determines the profile to be pressed is assigned to the pick-up in a known manner.
Derartige Strangpressen dienen beispielsweise dem Umformen von Aluminium. Im Strangguss hergestellte Bolzen aus Aluminium/Aluminiumlegierung werden vorgewärmt und in den Aufnehmer (Rezipient) der Strangpresse eingebracht. Dieser Rezipient ist mit der Matrize abgeschlossen, die in der Regel aus hochfestem Stahl besteht und die dem Profil entsprechende Öffnung trägt. Mit einem Druck von 750 und mehr N/mm2 wird dann mittels eines Stempels der Bolzen durch die Matrizenöffnung gepresst, sodass ein Strang mit dem gewünschten Profil entsteht.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.
Die bei Strangpressen auftretenden hohen Drücke müssen durch die Zuganker abgefangen werden. Insbesondere beim erstmaligen Inbetriebnehmen einer Strangpresse werden die Zuganker mit einer Streckkraft beaufschlagt, die zu Längenänderungen der Zuganker führen. Hierdurch erhalten die zwischen den Zylinderholm und Gegenholm die Zuganker umgreifenden Drucksäulen ein Spiel, das dazu führen kann, dass eine hochexakte horizontale und vertikale Ausrichtung der Strangpresse nicht sichergestellt werden kann. Insbesondere durch die hohen auf die Zuganker wirkenden Kräfte kann eine Verlagerung von Zylinderholm und Gegenholm relativ zueinander durch das vorhandene Spiel zwischen Drucksäulen und Zylinderholm bzw. Gegenholm nicht mehr ausreichend abgefangen werden. Dies wirkt sich auf die Maßtoleranzen der zu fertigenden Pressstränge aus.The high pressures that occur in extrusion presses must be absorbed by the tie rods. In particular, when an extrusion press is started up for the first time, a stretching force is applied to the tie rods, which leads to changes in the length of the tie rods. As a result, the pressure columns encompassing the tie rods between the cylinder spar and the counter spar are given a play which can lead to the fact that a highly precise horizontal and vertical alignment of the extrusion press cannot be ensured. In particular, due to the high forces acting on the tie rods, a displacement of the cylinder spar and opposing spar relative to one another can no longer be adequately absorbed by the existing play between the pressure columns and the cylinder spar or opposing spar. This affects the dimensional tolerances of the extruded strands to be produced.
Aus
Der Erfindung liegt die Aufgabe zugrunde, eine Strangpresse der gattungsgemäßen Art zu schaffen, bei der in einfacher weise eine aufgrund von Presskräften auftretendes Spiel von Drucksäulen ausgeglichen werden kann.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.
Erfindungsgemäß wird diese Aufgabe durch eine Strangpresse mit den im Anspruch 1 genannten Merkmalen gelöst. Dadurch, dass die Drucksäulen jeweils zumindest ein Druckstück umfassen, das in Längsrichtung der Drucksäulen längenveränderlich einstellbar ist, ist in vorteilhafter Weise möglich, ein durch die Inbetriebnahme oder im Betrieb der Strangpresse auftretendes Spiel zwischen Drucksäulen und Zylinderholm bzw. Gegenholm jederzeit auszugleichen. Dieser Spielausgleich kann ohne Demontage von Komponenten der gesamten Strangpresse jederzeit erfolgen. Dadurch, dass die Druckstücke auch zwischen Zylinderholm und Gegenholm angeordnet sind, ist zusätzlicher Bauraum für die Strangpresse nicht erforderlich.According to the invention, this object is achieved by an extruder with the features mentioned in claim 1. Because 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.
In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die Druckstücke stufenlos längenveränderlich einstellbar sind. Hierdurch kann in einfacher Weise eine sehr genaue Anpassung zum Zwecke des Spielausgleichs zwischen Drucksäulen und Zylinderholm bzw. Gegenholm erfolgen.In a preferred embodiment of the invention it is provided that 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.
In weiterer bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass das Druckstück zwei formschlüssig miteinander verbundene Spannscheiben aufweist, die die Zuganker umgreifen. Hierdurch wird in besonders einfacher Weise die Anordnung der Druckstücke möglich. Die Spannscheiben entsprechen ihrem Außendurchmesser im Wesentlichen dem Außendurchmesser der Drucksäulen und nehmen im Inneren den Zuganker auf.In a further preferred embodiment of the invention it is provided that 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.
Ferner ist in bevorzugter Ausgestaltung der Erfindung vorgesehen, dass die Spannscheiben koaxiale Führungsstege besitzen, die in korrespondierende Führungsnuten der Drucksäulen einerseits und des Zylinderholms bzw. des Gegenholms andererseits eingreifen. Hierdurch wird eine genaue zentrierte Anordnung der Druckstücke möglich.Furthermore, in a preferred embodiment of the invention it is provided that 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.
In weiterer bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die einander zugewandten Stirnseiten der Spannscheiben korrespondierende Auflaufflächen besitzen, die vorzugsweise eine selbsthemmende Steigung aufweisen. Hierdurch wird vorteilhaft möglich, durch einfaches Verdrehen der Spannscheiben zueinander die Längenveränderlichkeit des Druckstückes zu erreichen. Durch die selbsthemmende Steigung der Auflaufflächen ist ein selbsttätiges Rückstellen der Spannscheiben aufgrund axial wirkender Kräfte nicht möglich. Der Spielausgleich wird somit während des Betriebs der Strangpresse sicher erzielt.In a further preferred embodiment of the invention it is provided that 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.
In weiterer bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die Spannscheiben jeweils vier Auflaufflächen aufweisen, die jeweils bevorzugt 90° in Umfangsrichtung der Spannscheiben betrachtet abdecken und die weiter vorzugsweise einen Steigungswinkel im Bereich der Selbsthemmung aufweisen.In a further preferred embodiment of the invention it is provided that 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.
Durch eine derartige Ausgestaltung wird eine sichere verkippfreie Verstellung der Druckstücke bei sichergestellter Selbsthemmung erreicht.Such a configuration achieves a secure tilt-free adjustment of the pressure pieces with ensured self-locking.
Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred embodiments of the invention emerge from the other features mentioned in the subclaims.
Die Erfindung wir nachfolgend in einem Ausführungsbeispiel anhand der zugehörigen Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine schematische Schnittansicht durch eine Strangpresse;
- Fig. 2
- eine vergrößerte Detailansicht im Bereich eines Druckstückes;
- Fig. 3
- eine schematische Perspektivansicht eines Druckstückes; und
- Fig. 4
- eine schematische Perspektivansicht einer Spannscheibe des Druckstückes.
- Fig. 1
- a schematic sectional view through an extruder;
- Fig. 2
- an enlarged detailed view in the area of a pressure piece;
- Fig. 3
- a schematic perspective view of a pressure piece; and
- Fig. 4
- a schematic perspective view of a tensioning disk of the pressure piece.
Innerhalb des Pressrahmens 18 ist ein Presszylinder 20 sowieso ein Aufnehmer (Rezipient) 22 angeordnet. Der Aufnehmer 22 dient zur Aufnahme eines zu pressenden Blockes, beispielsweise einen Aluminiumbolzen. Zwischen Aufnehmer 22 und Gegenholm 14 ist eine Matrize 24 angeordnet.A
Der Presszylinder 20 weist einen Presskolben 26 auf.The
Die Zuganker 14 sind von Drucksäulen 28 umgeben, die sich einerseits an dem Gegenholm 14 und andererseits an einem Druckstück 30 abstützen. Das Druckstück 30 wiederrum stützt sich an dem Zylinderholm 12 ab.The
Die in
In den Aufnehmer 22 wird ein zu pressender Block, beispielsweise ein Bolzen aus Aluminium oder Aluminiumlegierung eingebracht. Dieser wird zuvor gegebenenfalls erwärmt. Mittels des Presszylinders 20, der hydraulisch oder elektrisch antreibbar ist, wird der Pressbolzen 26 auf den zu pressenden Materialbock gedrückt. Das Material des Blockes geht hierbei in einen Fließzustand über und wird durch die Matrizenöffnung der Matrize 24 gedrückt und tritt an der hier mit dem Pfeil 32 bezeichneten Seite der Strangpresse 10 als Strang aus.In the
A block to be pressed, for example a bolt made of aluminum or an aluminum alloy, is introduced into the
Mittels der Zuganker 14 wird der Zylinderholm 12 und der Gegenholm 14 in Position gehalten. Hierbei müssen die hohen Presskräfte, die 750 N/mm2 und mehr betragen können, abgefangen werden.The
Nachfolgend wird auf die erfindungsgemäß vorgesehene Anordnung der Druckstücke 30 Bezug genommen.Reference is made below to the arrangement of the
Diese Druckstücke 30 sind jedem der Zuganker 16 zugeordnet. Nach einem weiteren, nicht dargestellten Ausführungsbeispiel, können pro Zuganker auch zwei Druckstücke 30 vorgesehen sein. Das heißt in diesem Fall sind diese sowohl am Zylinderholm 12 als auch am Gegenholm 14 anliegend angeordnet. Auch kann nach einem weiteren, nicht dargestellten Ausführungsbeispiel vorgesehen sein, dass das Druckstück 30 in etwa mittig angeordnet ist und somit die Drucksäulen 28 in zwei Abschnitte unterteilt sind, von dem einer dem Zylinderholm 12 und der andere dem Gegenholm 14 zugeordnet ist.These
Unabhängig von der Anordnung und der Anzahl der Druckstücke 30 weisen diese den anhand der nachfolgenden
In
Die Spannscheibe 34 besitzt einen koaxialen Führungssteg 38, der in eine korrespondierende Nut 40 des Zylinderholms 12 eingreift. Die Spannscheibe 36 besitzt einen koaxialen Führungssteg 42, der in eine korrespondierende Nut 44 der Drucksäule 28 eingreift.The
Die Spannscheiben 34 und 36 besitzen einander zugewandte Stirnseiten 46 und 48.The clamping
Die Spannscheiben 34 und 36 bilden ferner eine gemeinsame Ringnut 50 aus, innerhalb der eine Ringfeder 52 angeordnet ist.The
In
Anhand der
In
Die Spannscheibe 36 weist an ihrer Stirnseite 48 mit den Auflaufflächen 56 der Spannscheibe 34 korrespondierende Auflaufflächen auf. Die Auflaufflächen der Spannscheiben 34 und 36 liegen somit aneinander an.On its
Im Ausgangszustand sind die Spannscheiben 34 und 36 so zueinander angeordnet, dass sich zwischen den Stirnseiten 46 und 48 das geringstmögliche Spaltmaß ergibt.In the initial state, the
Das in den
Im in
In the in
Ein Kraftschluss zwischen Zylinderholm 12 und Gegenholm 14 besteht über die Zuganker 14, die jeweils an der der Drucksäule 28 abgewandten Seite über Spannmuttern 64 fest verspannt sind.There is a frictional connection between the
Durch Aufbringen der Presskraft werden Zylinderholm 12 und Gegenholm 14 auseinander gedrängt und von den Zugankern 14 in Position gehalten. Insbesondere bei erstmaliger Inbetriebnahme werden die Zuganker 14 aufgrund der innewohnenden Materialeigenschaften einer gewissen Streckung unterzogen, sodass sich zwischen den Drucksäulen 28 und dem Zylinderholm 12 beziehungsweise Gegenholm 14 ein gewisses Spiel einstellt.By applying the pressing force, the
Zum Ausgleich dieses Spieles sind nunmehr die Druckstücke 30 vorgesehen. Durch Verdrehen der Spannscheiben 34 und 36 gegeneinander, wirken die im Anlagenkontakt stehenden Auflaufflächen der Spannscheiben 34 und 36 als Führungsflächen. Die Spannscheiben 34 und 36 bleiben somit in formschlüssigen Anlagenkontakt, wobei sich jedoch der Spalt zwischen den Spannscheiben 34 und 36 vergrößert. Diese Vergrößerung dieses Spaltes führt zum Ausgleich des Spiels zwischen Drucksäule 28 und Zylinderholm 12 beziehungsweise Gegenholm 14. Durch die Gestaltung der Auflaufflächen ist eine stufenlose Verstellung möglich. Die Druckstücke 30 sind somit in Längsrichtung der Drucksäule 28 längenveränderlich einstellbar. Diese Verstellung erfolgt soweit, dass wieder ein Formschluss zwischen Zylinderholm 12 und Gegenholm 14 über Druckstück 30 und Drucksäule 28 gegeben ist.To compensate for this play, the
Die während des Pressens auftretenden Presskräfte führen somit nicht zu einer eventuellen Verkantung des Zylinderholms 12 und des Gegenholms 14 zueinander.The pressing forces occurring during pressing therefore do not lead to any tilting of the
Die gewählte Steigung der Auflaufflächen ist hierbei so gewählt, dass eine Selbsthemmung eintritt. Dies bedeutet bei Auftreten einer axialen Kraft auf die Spannscheiben 34 und 36 verändern diese Ihren Abstand nicht. Insbesondere erfolgt hierdurch kein Rückdrehen der Spannscheiben 34 und 36 zueinander.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
- 1010
- StrangpresseExtrusion press
- 1212th
- ZylinderholmCylinder spar
- 1414th
- GegenholmCounter spar
- 1616
- ZugankerTie rod
- 1818th
- PressrahmenPress frame
- 2020th
- PresszylinderPress cylinder
- 2222nd
- AufnehmerTransducer
- 2424
- Matrizedie
- 2626th
- PressbolzenPress bolt
- 2828
- DrucksäulePressure column
- 3030th
- DruckstückPressure piece
- 3232
- Pfeilarrow
- 3434
- SpannscheibeWasher
- 3636
- SpannscheibeWasher
- 3838
- FührungsstegGuide bar
- 4040
- NutGroove
- 4242
- FührungsstegGuide bar
- 4444
- NutGroove
- 4646
- StirnseiteFront side
- 4848
- StirnseiteFront side
- 5050
- RingnutRing groove
- 5252
- RingfederRing spring
- 5454
- Öffnungopening
- 5656
- AuflaufflächeRamp surface
- 5858
- BasisBase
- 6060
- EndpunktEnd point
- 6262
- Stufestep
- 6464
- SpannmutterClamping nut
Claims (9)
dadurch gekennzeichnet, dass
die Drucksäule (28) jeweils zumindest ein Druckstück (30) umfasst, das in Längsrichtung der Drucksäule (28) längenveränderlich einstellbar ist.Extrusion press (10) with a cylinder spar (12), a counter spar (14) and at least one tie rod (16) connecting them to form a press frame (18), a pressure column (28) surrounding the tie rod and located between the cylinder spar (12) and the Counter bar (14) is arranged,
characterized in that
the pressure column (28) each comprises at least one pressure piece (30) which is adjustable in length in the longitudinal direction of the pressure column (28).
dadurch gekennzeichnet, dass
das Druckstück (30) zwei formschlüssig miteinander verbundene Spannscheiben (34, 36) aufweist, die die Zuganker (16) umgreifen.Extrusion press (10) according to claim 1,
characterized in that
the pressure piece (30) has two tensioning disks (34, 36) connected to one another in a form-fitting manner, which grip around the tie rods (16).
dadurch gekennzeichnet, dass
die Druckstücke (30) stufenlos längenveränderlich einstellbar sind.Extrusion press (10) according to one of the preceding claims,
characterized in that
the pressure pieces (30) are continuously adjustable in length.
dadurch gekennzeichnet, dass
die einander zugewandten Stirnseiten (46, 48) der Spannscheiben (34, 36) korrespondierende Auflaufflächen (56) besitzen.Extrusion press (10) according to one of the preceding claims,
characterized in that
the facing ends (46, 48) of the clamping disks (34, 36) have corresponding run-up surfaces (56).
dadurch gekennzeichnet, dass
die Auflaufflächen (56) eine selbsthemmende Steigung aufweisen.Extrusion press (10) according to claim 4,
characterized in that
the ramp surfaces (56) have a self-locking slope.
dadurch gekennzeichnet, dass
die Spannscheiben (34, 36) jeweils vier Auflaufflächen (56) aufweisen.Extrusion press (10) according to one of the preceding claims,
characterized in that
the clamping disks (34, 36) each have four run-up surfaces (56).
dadurch gekennzeichnet, dass
die Auflaufflächen (56) sich jeweils über einen Winkel von 90° erstrecken.Extrusion press (10) according to claim 6,
characterized in that
the ramp surfaces (56) each extend over an angle of 90 °.
dadurch gekennzeichnet, dass
die Auflaufflächen (56) einen Steigungswinkel von im Bereich der Selbsthemmung aufweisen.Extrusion press (10) according to one of the preceding claims,
characterized in that
the run-up surfaces (56) have an angle of inclination in the area of self-locking.
dadurch gekennzeichnet, dass
die Spannscheiben (34, 36) Führungsstege (38, 42) aufweisen, die mit korrespondierenden Führungsnuten (40, 44) der Drucksäule (28) und des Zylinderholms (12) und/oder des Gegenholms (14) zusammenwirken.Extrusion press (10) according to one of the preceding claims,
characterized in that
the clamping disks (34, 36) have guide webs (38, 42) which interact with corresponding guide grooves (40, 44) of the pressure column (28) and of the cylinder spar (12) and / or of the counter spar (14).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019134506.5A DE102019134506B3 (en) | 2019-12-16 | 2019-12-16 | Extrusion press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3838434A1 true EP3838434A1 (en) | 2021-06-23 |
EP3838434B1 EP3838434B1 (en) | 2022-04-06 |
Family
ID=73838983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20214124.8A Active EP3838434B1 (en) | 2019-12-16 | 2020-12-15 | Extruder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3838434B1 (en) |
DE (1) | DE102019134506B3 (en) |
ES (1) | ES2912198T3 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021527A1 (en) | 1995-01-11 | 1996-07-18 | Sms Schloemann Gmbh | Horizontal metal bar extrusion press |
WO2013064250A1 (en) * | 2011-10-31 | 2013-05-10 | Sms Meer Gmbh | Method for producing metal extrusion press products, and extrusion and tube press |
EP2804705B1 (en) * | 2012-01-19 | 2016-03-30 | Danieli & C. Officine Meccaniche SpA | Press for direct extrusion of metal products |
CN106391742A (en) * | 2016-11-21 | 2017-02-15 | 考迈托(佛山)挤压科技股份有限公司 | Extruder pull rod structure and installation method |
CN109604362A (en) * | 2018-11-21 | 2019-04-12 | 中国重型机械研究院股份公司 | A kind of hydrostatic extruder structure of prestressed frame |
Family Cites Families (1)
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 |
-
2019
- 2019-12-16 DE DE102019134506.5A patent/DE102019134506B3/en active Active
-
2020
- 2020-12-15 ES ES20214124T patent/ES2912198T3/en active Active
- 2020-12-15 EP EP20214124.8A patent/EP3838434B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021527A1 (en) | 1995-01-11 | 1996-07-18 | Sms Schloemann Gmbh | Horizontal metal bar extrusion press |
WO2013064250A1 (en) * | 2011-10-31 | 2013-05-10 | Sms Meer Gmbh | Method for producing metal extrusion press products, and extrusion and tube press |
EP2804705B1 (en) * | 2012-01-19 | 2016-03-30 | Danieli & C. Officine Meccaniche SpA | Press for direct extrusion of metal products |
CN106391742A (en) * | 2016-11-21 | 2017-02-15 | 考迈托(佛山)挤压科技股份有限公司 | Extruder pull rod structure and installation method |
CN109604362A (en) * | 2018-11-21 | 2019-04-12 | 中国重型机械研究院股份公司 | A kind of hydrostatic extruder structure of prestressed frame |
Non-Patent Citations (2)
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 (en) | 2022-05-24 |
DE102019134506B3 (en) | 2021-03-25 |
EP3838434B1 (en) | 2022-04-06 |
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