EP2804705A1 - Presse pour extrusion directe de produits métalliques - Google Patents
Presse pour extrusion directe de produits métalliquesInfo
- Publication number
- EP2804705A1 EP2804705A1 EP13710020.2A EP13710020A EP2804705A1 EP 2804705 A1 EP2804705 A1 EP 2804705A1 EP 13710020 A EP13710020 A EP 13710020A EP 2804705 A1 EP2804705 A1 EP 2804705A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extrusion
- axis
- shear
- columns
- press
- 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
- 238000004553 extrusion of metal Methods 0.000 title description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 75
- 238000005520 cutting process Methods 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000000463 material Substances 0.000 description 10
- 238000005452 bending Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- 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
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/04—Cutting-off or removing waste
Definitions
- the present invention refers to a press for the direct extrusion of metal section bars, obtained from the extrusion of billets, provided with shear for cutting the bottom.
- Direct extrusion presses essentially comprise a main cylinder which serves the task of providing the push or force required to deform a billet.
- Billets are the starting product on which the process of extrusion is carried out, and may consist of metals or alloys, such as aluminium, copper, brass, steel, etc. The cross-sections thereof may differ in diameter.
- aluminium has a specific pressure between 50 and 80 kg/mm , according to the force of the press and the cross-section of the billet.
- the maximum extrusion speeds achievable also differ based on the metal to be extruded: for example, aluminium may be extruded with die crossing speeds between 0 and 30 mm/sec, copper and brass with speeds between 0 and 65 mm/sec, steel with speeds between 0 and 400 mm/sec.
- Essential elements forming extrusion presses are a main cylinder which, through a pressing stem, pressurizes the billet inside a container and then causes it to cross the hole of a die.
- a shear is provided at the end of the extrusion of the billet, with the task of cutting the last stretch of billet, called "bottom", which remained upstream of the die because the billet impurities are conveyed therein.
- the bottom remains attached to the die itself and is removed and caused to fall by means of the action of a shear with a top-downwards cutting movement orthogonal to the billet axis.
- JP8033917 and JP8010831 disclose solutions for fixing the shear to the press in which the shear is firmly anchored to the reaction crosspiece of the press by means of a frame arranged overhangingly above the die pack.
- the structure for anchoring the shear with the reaction crosspiece of the press is therefore staggered by a given distance with respect to the cutting cross-section, which, during shearing, causes a bending moment on the anchoring structure given by the product of the cutting force multiplied by the distance from the surface of the crosspiece to which the anchoring structure is fixed.
- such a residual protruding material prevents an effective gripping between the container and the die, thus leaving a gap through which the material partly escapes from the successive billet to be extruded, thus causing a waste of material and the need to manage such escapes during the activity of the press.
- the object of the invention is to provide a press equipped with a shear for the direct extrusion of metal products which overcomes the above-mentioned problems and improves the cutting quality of the bottom, thus generating precise and planar cutting surfaces, thus ensuring complete cleaning of the die surface from the bottom, so as to prevent residues of extruded material on the die.
- Another object of the invention is to ensure a clean gripping surface, between die and container, without any flashes so as to prevent discontinuity through which the billet, which is then extruded, may escape thus causing a loss of material and the formation of further flashes.
- Another, no less important object of the invention is the one of providing an extrusion press which is compact while ensuring easy maintenance operations.
- a press for extrusion of a metal product in particular a billet, in which an extrusion axis is defined and which, according to claim 1 comprises: a main cylinder arranged at a first end of the press with respect to the extrusion axis and comprising a piston, a movable crosspiece, mounted on the piston of said main cylinder, a pressing stem coaxial to and actuated by the main cylinder piston, a container having a through hole therein coaxial to the axis and configured to contain the billet during an extrusion operation, a reaction crosspiece ⁇ arranged at a' second end of the press in relation to the extrusion axis, having a througH hole coaxial to the axis to allow the passage of the metal product after the extrusion Operation, having an extrusion die, with a hole coaxial to the axis , and a pressing ring] arranged
- the shear is mounted on the longitudinal columns and more precisely, on the cases of the columns, in a preferred embodiment.
- the structure which restrains the shear to the columns may be equipped with sliding blocks due to which longitudinal movement can be carried out along the columns themselves by means of suitable sliding guides and controlled for example by means of hydraulic or pneumatic cylinders or rack cylinders. Due to such a coupling mode, the shear may be arranged in different axial positions along the columns also during the course of extrusion.
- the shear may be moved parallel to the axis of the columns of the press, and as an approach space for the shear is provided close to the reaction crosspiece, the shear can avoid being a hindrance during the operation for changing the container: indeed, it is possible to retract it within the volume space of the die thus freeing up the space in front of the end plane of the die, thus making a larger space available to carry out the extraction of the container from the top since the shear is no longer a hindrance.
- This further allows the columns to be shortened by a quantity equal to the thickness of the protuberance of the shear structure with respect to the die.
- the solution of the invention allows both movement outside of the working cycle, in which the shear is moved to allow the extraction of the container for maintenance, and during the working cycle, in which the shear is moved from the cutting line during the extrusion step to make room for the container and the related crosspiece.
- a further advantage of the invention consists in the possibility of automatically controlling the axial sliding of the shear during the working cycle, but without excluding the possibility of also automating the movement during maintenance.
- a direct extrusion press may be provided with columns, and accordingly the entire structure, which are shorter in length with respect to known presses, thus ensuring increased rigidity of the press and improved quality of the extrusion product.
- Fig. 1 shows a diagrammatic side view of the extrusion press in accordance with the invention
- Fig. 2 shows a sectional view on a plane orthogonal to the direction of the axis of the press of the invention
- Fig. 3 shows a sectional view on an axial plane of the press of the invention, in a first working position
- Fig. 4 shows a sectional view on an axial plane of the press of the invention, in a second working position
- Fig. 5 shows a sectional view on an axial plane of the press of the invention, in a second working position
- Fig. 6 shows a view from above of the press of the invention.
- the direct extrusion press of the invention comprises a main cylinder 1 , a pressing stem 2 which extends the main cylinder piston 1 and is about the same in diameter as billet 7, before the extrusion operation.
- the pressing stem 2 serves the purpose of transmitting the extrusion pressure generated by the main cylinder 1 onto the billet to cause it to pass inside the axial hole 3' of container 3.
- the diameter of this hole 3' is substantially equal to billet 7 before extrusion so that it does not place resistance to the passage of the billet when it is pushed by the pressing stem 2 against die 4.
- a pressing block 2' which serves to seal hole 3' of the container and prevent metal leakage from the inlet.
- Container 3 serves the purpose of laterally containing billet 7 during the extrusion process, and of totally guiding the metal flow inside die 4.
- Container 3 is kept heated with heating temperatures which depend on the metal to be processed, for example for aluminium it is kept at temperatures of about 450 °C.
- Die 4 consists of a threader with a machined middle hole shaped like the cross-section of the linear product to be obtained at the end of extrusion.
- the cross-section of the surface of the shape of the middle hole of die 4 is smaller than the area of the cross-section of billet 7 before extrusion.
- the flow of the metal mass crosses die 4 under the pushing force exerted by the main cylinder 1 on the rear end of billet 7 thus taking the shape of the cross-section wanted, and lengthening and forming bars also more than 100 m long. Due to the principle of the conservation of mass, the end bar will have the same weight as the billet introduced into the container less the bottom, while its length will be defined according to the area of its end crosswise cross-section with respect to the initial one of billet 7.
- the structure of the extrusion press 100 comprises a reaction crosspiece 5 on which a pressing ring 10 is mounted coaxially to the extrusion axis, which serve the purpose of countering the force of the main cylinder 1 exerted on the billet, thus transmitting it to the columns 9', 9" of the structure, and also to the columns 9 m and 9 lv not shown in fig. 1.
- the longitudinal columns 9', 9", 9'" and 9 1V are preferably four in number and comprise the pre-tensioned tie rods 16', 16", 16'", 16 ,v closed within respective cases 17', 17", 17 111 , 17 1V which also serve as spacers between the two crosspieces 5 and 15 of the extrusion press 100. Head 5 is thereby rigidly connected to the support of the main cylinder 1.
- the structure of shear 6 is restrained to the cases 17' and 17'" of at least two of the columns, for example of the two upper columns 9' and 9 m , by means of restraints which during the cutting operation, only allow it to develop a reaction which is vertical to the cut, which is released onto the columns of the press; due to such restraints, the shear is precisely fixed on the vertical of the cutting plane and is in perfectly orthogonal position to axis X; thereby, the cut obtained is perfectly linear and has no material residuals.
- a second variant of the invention provides that shear 6 is restrained for example to cases 17' and 17 m of the upper columns 9' the 9 1U by means of a kinematic coupling which allows it to slide longitudinally along the columns 9' and 9" 1 , but keeps it stable in a middle position between the two cases 17' and 17 m in direction parallel and crosswise to axis X, thus allowing the execution of the cutting movement along the direction of arrow Z.
- This is obtained by means of the sliding blocks 18' and 18" integral to the shear structure which slide within two longitudinal guides 13', 13" parallel to the extrusion axis X, integral with a respective column 9', 9".
- blade 12 of the shear may be positioned precisely on the vertical of the cutting plane and in position perfectly orthogonal to axis X, thus also minimizing in this case the bending moment which acts on the structure of shear 6 during the cutting, which values are much lower than the ones generated with shear configurations of the state of the art.
- a movement system is provided (not shown in the figures) for sliding shear 6 along the guides 13, for example made by means of a hydraulic or pneumatic cylinder or through a rack, controlled in a completely automated manner. This coupling of shear 6 allows it to be positioned in different axial positions along the columns also during extrusion.
- shear 6 on the extrusion press 100 is carried out in the following way.
- the position of shear 6 is the quiescent one shown in fig. 3.
- container 3 and the pressing stem 2 retract with respect to die 4, i.e. they move to the left with reference to the view of fig. 1 or to the right with reference to fig. 3, thus moving along axis X.
- shear 6 is caused to slide in direction of arrow X' until it reaches the working position, as shown in fig.
- shear 6 Since the structure of shear 6 is fixed to the cases 17', 17'" of the columns in an area immediately above the bottom to be cut, the cutting operation occurs without any significant bending moments on the structure of shear 6, thus ensuring a completely planar and precise cut which does not leave material surpluses protruding from the surface of the die because it is perfectly flush with the top surface of die 4 and therefore it allows a perfect contact surface of the container on the die at each billet extrusion cycle after the bottom cut.
- die 4 is restrained to the reaction crosspiece 5 so as to leave a sufficient approach space above die 4 in axial direction to house shear 6 without it protruding past the cutting plane and therefore without it being intersected by the cutting plane when it is in a position proximal to the reaction crosspiece 5 which corresponds to the quiescent position.
- the guides 13 are designed with a limited length which simply allows shear 6 to go from the working position shown in figure 5, when the press is in extrusion activity and shear 6 cuts the bottom, to the quiescent position shown in figure 3, when shear 6 is in inactive position above die 4 and it is easier to replace container 3 in this position since all the vertical volume band of shear 6 between die 4 and container 3 remains free, unlike known solutions of the state of the art. Therefore, this allows the length of the columns 9', 9", 9" 9 iv and of the cases 17', 17", 17" 1 , 17 1V to be designed smaller with respect to other configurations of extrusion presses of the state of the art, thus increasing the overall rigidity of the entire press structure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
- Shearing Machines (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000053A ITMI20120053A1 (it) | 2012-01-19 | 2012-01-19 | Pressa di estrusione diretta per prodotti metallici |
PCT/IB2013/050474 WO2013108222A1 (fr) | 2012-01-19 | 2013-01-18 | Presse pour extrusion directe de produits métalliques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2804705A1 true EP2804705A1 (fr) | 2014-11-26 |
EP2804705B1 EP2804705B1 (fr) | 2016-03-30 |
Family
ID=45998447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13710020.2A Active EP2804705B1 (fr) | 2012-01-19 | 2013-01-18 | Presse pour extrusion directe de produits métalliques |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140373591A1 (fr) |
EP (1) | EP2804705B1 (fr) |
CN (1) | CN104080553B (fr) |
IT (1) | ITMI20120053A1 (fr) |
RU (1) | RU2577663C1 (fr) |
WO (1) | WO2013108222A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUB20159680A1 (it) * | 2015-12-16 | 2017-06-16 | Turla S R L | Rilevamento automatico dimensione pacco matrice. |
CN106180238A (zh) * | 2016-08-29 | 2016-12-07 | 无锡市源昌机械制造有限公司 | 安装多功能工作端盖的挤压机 |
CN106739124B (zh) * | 2016-12-09 | 2019-02-15 | 西安麦特沃金液控技术有限公司 | 微晶铜球全自动液压成型机 |
WO2020023701A1 (fr) * | 2018-07-25 | 2020-01-30 | Graftech International Holdings Inc. | Presse d'extrusion et procédé d'utilisation |
CN109550802A (zh) * | 2018-12-14 | 2019-04-02 | 江西福格新能源传动技术有限公司 | 一种差速器齿轮轴向分流冷挤压成形装置与方法 |
DE102019134506B3 (de) * | 2019-12-16 | 2021-03-25 | Unterschütz Sondermaschinenbau GmbH | Strangpresse |
CN114210753B (zh) * | 2021-12-09 | 2023-11-03 | 佛山市现代铜铝型材有限公司 | 一种传输效率高的生产铝型材的流水线设备 |
DE102023104739A1 (de) | 2022-11-14 | 2024-05-16 | Sms Group Gmbh | Pressrestschere sowie Verfahren zum Abscheren eines Pressrestes |
Family Cites Families (28)
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 |
US2720970A (en) * | 1950-12-09 | 1955-10-18 | Roux Pierre | Extrusion press |
US2728453A (en) * | 1951-08-17 | 1955-12-27 | Lake Erie Engineering Corp | Extrusion press |
GB829460A (en) * | 1957-08-21 | 1960-03-02 | Loewy Eng Co Ltd | Improvements in or relating to metal extrusion presses |
US3220237A (en) * | 1962-01-29 | 1965-11-30 | Farrel Corp | Adjustable shear mounting for a hydraulic extrusion press |
US3184944A (en) * | 1963-09-18 | 1965-05-25 | Baldwin Lima Hamilton Corp | Extrusion press |
DE1983024U (de) | 1968-01-31 | 1968-04-11 | Commw Scient Ind Res Org | Apparatur zur textilanfaerbung mittels farbbaedern. |
DE1938024A1 (de) * | 1969-07-26 | 1971-02-04 | Karl Gartner | Strangpresse zur Herstellung von Leichtmetallprofilen |
SU379301A1 (ru) * | 1971-07-27 | 1973-04-20 | Псесоюзная | |
JPS595050B2 (ja) | 1977-10-07 | 1984-02-02 | 株式会社神戸製鋼所 | 中間フレ−ム型間接押出プレス |
US4365497A (en) * | 1977-10-07 | 1982-12-28 | Kobe Steel, Ltd. | Intermediate frame type indirect extrusion press |
JPS5856013Y2 (ja) | 1979-04-12 | 1983-12-23 | ワイケイケイ株式会社 | 押出装置 |
DE3120641C2 (de) | 1980-05-24 | 1987-03-12 | Kobe Steel, Ltd., Kobe, Hyogo | Indirekt-Metallstrangpresse |
US4379398A (en) | 1980-06-12 | 1983-04-12 | Kabushiki Kaisha Kobe Seiko Sho | Pull-back type indirect extrusion press |
JPS5728615A (en) * | 1980-07-25 | 1982-02-16 | Kobe Steel Ltd | Indirect extrusion press provided with intermediate frame |
JPS5737507U (fr) | 1980-08-07 | 1982-02-27 | ||
SU1090470A1 (ru) * | 1982-10-22 | 1984-05-07 | Научно-Исследовательский Институт Тяжелого Машиностроения Производственного Объединения "Уралмаш" | Устройство дл отделени и передачи пресс-шайбы к горизонтальному прессу |
JPS60141911U (ja) | 1984-02-25 | 1985-09-20 | 株式会社神戸製鋼所 | 間接押出プレス |
JPH0833917B2 (ja) | 1986-05-23 | 1996-03-29 | 日本電信電話株式会社 | 知的会話処理による図形入力処理装置 |
JPH0810831B2 (ja) | 1987-06-11 | 1996-01-31 | 日本電気株式会社 | 並列比較型a―d変換回路 |
IT1251438B (it) | 1991-10-24 | 1995-05-09 | Gian Matteo Tornese | Pressa per estrusione di metalli, con cesoia per il taglio di fondelli di profilati estrusi |
CN2171429Y (zh) * | 1992-09-28 | 1994-07-13 | 无锡县胜华冶金机械厂 | 卧式液压挤压机 |
JP2943970B2 (ja) | 1994-05-31 | 1999-08-30 | 宇部興産株式会社 | 押出プレスのディスカード切断方法および装置 |
CN1186005A (zh) * | 1996-12-26 | 1998-07-01 | 陈武雄 | 改良结构的铝挤压型材机械 |
DE10231328B4 (de) | 2002-07-11 | 2005-03-24 | Erbslöh Aluminium Gmbh | Strangpresse und Stangpressverfahren |
CN100577317C (zh) * | 2008-07-10 | 2010-01-06 | 周家镳 | 合金钢卧式反向挤压机 |
IT1391752B1 (it) * | 2008-11-03 | 2012-01-27 | Danieli Off Mecc | Pressa multifunzione per estrusione con attrezzamento multiplo e relativo procedimento di estrusione |
US8490453B2 (en) | 2009-04-15 | 2013-07-23 | Ube Machinery Corporation, Ltd. | Extrusion press |
-
2012
- 2012-01-19 IT IT000053A patent/ITMI20120053A1/it unknown
-
2013
- 2013-01-18 WO PCT/IB2013/050474 patent/WO2013108222A1/fr active Application Filing
- 2013-01-18 EP EP13710020.2A patent/EP2804705B1/fr active Active
- 2013-01-18 CN CN201380005945.6A patent/CN104080553B/zh active Active
- 2013-01-18 RU RU2014133954/02A patent/RU2577663C1/ru active
- 2013-01-18 US US14/372,964 patent/US20140373591A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2013108222A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2577663C1 (ru) | 2016-03-20 |
US20140373591A1 (en) | 2014-12-25 |
CN104080553A (zh) | 2014-10-01 |
CN104080553B (zh) | 2016-07-06 |
ITMI20120053A1 (it) | 2013-07-20 |
WO2013108222A1 (fr) | 2013-07-25 |
EP2804705B1 (fr) | 2016-03-30 |
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