EP3117914A1 - Strangpresse mit einer vorrichtung zum automatischen bürsten des stempels der presse - Google Patents

Strangpresse mit einer vorrichtung zum automatischen bürsten des stempels der presse Download PDF

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Publication number
EP3117914A1
EP3117914A1 EP16179081.1A EP16179081A EP3117914A1 EP 3117914 A1 EP3117914 A1 EP 3117914A1 EP 16179081 A EP16179081 A EP 16179081A EP 3117914 A1 EP3117914 A1 EP 3117914A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
extrusion
press
press according
metal brush
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.)
Withdrawn
Application number
EP16179081.1A
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English (en)
French (fr)
Inventor
Giovanni Corti
Valerio Presezzi
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.)
PRESEZZI EXTRUSION SpA
Original Assignee
PRESEZZI EXTRUSION SpA
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 PRESEZZI EXTRUSION SpA filed Critical PRESEZZI EXTRUSION SpA
Publication of EP3117914A1 publication Critical patent/EP3117914A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/06—Cleaning dies, ducts, containers or mandrels
    • 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
    • B21C23/218—Indirect extrusion presses
    • 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
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied

Definitions

  • the object of the present invention is an extrusion press with a device to automatically remove metal material deposited on a mandrel or spindle of such press during extrusion according to the preamble of the main claim.
  • an extrusion press is provided with a mandrel adapted to penetrate within a container where a metal billet is placed and provided with its own extrusion die in order to extrude an article of desired shape from such billet.
  • a sealing ring or "heel” is provided at such a die.
  • the mandrel moves along its own axis under the thrust action of a pressing member in order to penetrate into the container and extrude the article. After this operation, the mandrel retracts from said container away from it in order to allow the introduction of another billet into the container. Then, the extrusion process resumes.
  • the mandrel is also supported by a rotating body that sets it in rotation about such longitudinal axis at least to lubricate it.
  • the mandrel is separated from the support member thereof and is treated with descaling agents like soda.
  • descaling agents like soda.
  • this operation requires the shutdown of the machine (extrusion press), the intervention of operators thereon, the removal of the mandrel and its cleaning, which usually takes place by immersing it in a bath of such descaling agent, like soda. All of this involves considerable time and thus has considerable costs.
  • DE 31 20 770 describes an extrusion press provided with a device for cleaning the mandrel from the material that has accumulated on the surface thereof during the extrusion.
  • the known device comprises a rotatable mechanism to rotate the mandrel about its axis, a “smoothing or grinding” mechanism (grinder mechanism) adapted to grind the free end portion of the mandrel and a transfer mechanism for moving such grinding mechanism towards and away from the mandrel.
  • the object of the present invention is to provide an extrusion press provided with a device that is automatically and accurately able to remove the metal material that accumulates on the surface of the mandrel of an extrusion press without the need to remove it from the machine.
  • Another object is to provide a press with a device of the above type which can be used without any time constraint between two or more extrusions.
  • a further object is to provide a press with a device of the above type which can allow maintaining an optimal functionality of the machine for long periods without subjecting it to unnecessary shutdown periods.
  • Another object is to provide a press with a device of the above type which allows the lubrication of the mandrel during the removal of the metal material from its surface.
  • an extrusion press 1 is shown in its entirety in figure 1 and comprises a base 2 that is associated with several known parts adapted to allow the extrusion of an aluminum (or other metal) billet, in particular comprising a container 3 where an extrusion die 4 is placed and supported by the base, a main axially movable cylinder 5 in which a rotatable support member 6A of a mandrel 7 moves, provided with a free end or mandrel head 8 and attached at the other end 8A to the support member 6A.
  • the latter is placed inside a fixed body 6.
  • a drilling piston 10 moves mandrel 7 through the action on the support member 6A, said movement being obtained along a longitudinal axis W of the mandrel coincident with the longitudinal axis of piston 10, of container 3, of die 4 and ultimately, of the extrusion press 1.
  • Such support member 6A is set in rotation about axis W by a usual hydraulic motor 6B carried by body 6, a motor that in this way also sets mandrel 7 in rotation about such axis.
  • a device 15 is provided in the vicinity of die 4 and container 3, adapted to automatically remove the metal material that accumulates, with subsequent extrusions, on the surface of mandrel 7. Such removal occurs after (or before) any extrusion, i.e. when the spindle is still outside die 4 with head 8 thereof.
  • Device 15 is attached to container 3 through a casing 18 and is placed on a side 3A of such container facing towards mandrel 7.
  • Said device 15 is radially movable towards axis W of mandrel 7.
  • such device comprises brushing means 20 placed on a side of mandrel 7 and adapted to contact the surface thereof when, as said, it is outside the extrusion die and is preferably in rotation.
  • Such brushing means 20 selectively (i.e. only when desired) contact the outer surface of mandrel 7 and remove therefrom the metal material that has deposited thereon.
  • the intervention on said surface takes place after a relatively large number of operations.
  • the intervention takes place by moving such means with respect to mandrel 7 and towards it.
  • device 15 comprises a body or frame 22 (preferably box-shaped in order to limit the weight thereof) at a face 23 whereof the brushing means 20 are provided, movable away from it.
  • the latter comprise a metal brush 25 integral to a shaft 26 set in rotation by an electric motor 27.
  • the motor has an output shaft 28 on which a pulley 29 is keyed, adapted to move a belt 30; the latter transfers the motion of shaft 28 to a toothed gearing 31 keyed on shaft 26 and thereby to the metal brush 25.
  • motor 27 and brush 25 are associated with a box-shaped support 32 carried by frame 18 and at a distance between them.
  • Members 38 for moving the brush (or the support 32 thereof) along side 23 of said frame are provided at a face 34 of said frame 22, opposite to 23.
  • the motor in the vicinity of brush 25 (on the same side or on opposite sides of the box-shaped support 32) and connect them in a different manner (such as through toothed wheels or pinions in direct coupling).
  • belt 30 is inserted within the box-shaped support 32, as are the toothed gearing or pulley 29. This protects them further from any leakage of metal from the extrusion press and from bumps, and also allows lubricating them during operation with a micro-lubrication system per se known (and not shown). Moreover, support 32 is made since movable parts are contained and these must be closed and safe as much as possible.
  • the output shaft 28 and 26 are supported by the box-shaped support 32 through suitable bearings 40.
  • the metal brush 25 is preferably inserted in a casing 41, open in 42 on a side 43, from which the brush partially protrudes to contact mandrel 7 and remove the metal accumulated on its surface.
  • a corresponding nozzle 47 is provided for dispensing a lubricating product.
  • Such lubricant is not dispersed around the mandrel but it dispensed only on the part on which the metal brush 25 works.
  • the box-shaped support 32 is movable along face 23 of frame 18.
  • such support 32 is associated with sliding blocks or carriages 50 sliding in guides 51 of frame 22 when the moving means 38 are actuated (by a device control unit, not shown, which is connected or is part of a control unit of the extrusion and its single parts).
  • Such moving means comprise a gearmotor or electric motor 55 attached to body 18 and actuating a worm screw 56 (for example, ball recirculating) cooperating with a threaded bush 57 integral with a shelf 58 projecting from support 32.
  • the rotation of the screw generated by the gearmotor or electric motor 55 results in the displacement of bush 57 along the screw itself and thus to the corresponding movement of shelf 58 and support 32 along guides 51.
  • brush 25 can reach (or move away from) mandrel 7 to remove, as said, the material that has deposited thereon.
  • Said movement is also controlled by usual displacement sensors: for example, the vertical movement is controlled by an encoder built into the motor. The whole is controlled and managed by PLC.
  • the brushing means 20 can autonomously move parallel to frame 22 through the movement of support 32 generated by motor 55 so as to reach mandrel 7; during this movement, brush 25 is set in rotation by motor 27.
  • the brush drops to touch the mandrel and is rotated at "high speed”.
  • the mandrel is set in rotation and simultaneously it is axially translated so as to have a "helical” cleaning.
  • the mandrel rotation about axis W or at least that of brush 25 results in a brushing action on the surface of such mandrel 7 which causes the removal of the metal material (or residue) deposited (or hardened) thereon after one or (preferably) multiple extrusions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP16179081.1A 2015-07-13 2016-07-12 Strangpresse mit einer vorrichtung zum automatischen bürsten des stempels der presse Withdrawn EP3117914A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2015A002137A ITUB20152137A1 (it) 2015-07-13 2015-07-13 Dispositivo per asporare in modo automatico materiale metallico depositatosi su un mandrino in una pressa di estrusione

Publications (1)

Publication Number Publication Date
EP3117914A1 true EP3117914A1 (de) 2017-01-18

Family

ID=54477068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16179081.1A Withdrawn EP3117914A1 (de) 2015-07-13 2016-07-12 Strangpresse mit einer vorrichtung zum automatischen bürsten des stempels der presse

Country Status (2)

Country Link
EP (1) EP3117914A1 (de)
IT (1) ITUB20152137A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715716A (zh) * 2020-06-03 2020-09-29 邓煜璋 一种铝型材挤压机的清压余送料装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113967667A (zh) * 2021-09-16 2022-01-25 惠州高康达实业有限公司 铝型材挤压成型设备以及铝型材挤压成型方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491886A (fr) * 1966-09-07 1967-08-11 Davy & United Eng Co Ltd Porte-récepteur pivotant pour presse d'extrusion
DE3120770A1 (de) 1980-05-24 1982-02-11 Kobe Steel, Ltd., Kobe, Hyogo Reinigungsvorrichtung fuer den dorn einer strangpresse
DE3928888A1 (de) * 1989-08-31 1991-03-07 Benteler Werke Ag Vorrichtung zum glaetten der oberflaeche einer dornstange

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491886A (fr) * 1966-09-07 1967-08-11 Davy & United Eng Co Ltd Porte-récepteur pivotant pour presse d'extrusion
DE3120770A1 (de) 1980-05-24 1982-02-11 Kobe Steel, Ltd., Kobe, Hyogo Reinigungsvorrichtung fuer den dorn einer strangpresse
DE3928888A1 (de) * 1989-08-31 1991-03-07 Benteler Werke Ag Vorrichtung zum glaetten der oberflaeche einer dornstange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715716A (zh) * 2020-06-03 2020-09-29 邓煜璋 一种铝型材挤压机的清压余送料装置
CN111715716B (zh) * 2020-06-03 2022-09-27 佛山市粤兴桥达机械有限公司 一种铝型材挤压机的清压余送料装置

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