EP3645183A1 - Outil de type pont servant à produire des profilés extrudés à section transversale variable - Google Patents

Outil de type pont servant à produire des profilés extrudés à section transversale variable

Info

Publication number
EP3645183A1
EP3645183A1 EP18745490.5A EP18745490A EP3645183A1 EP 3645183 A1 EP3645183 A1 EP 3645183A1 EP 18745490 A EP18745490 A EP 18745490A EP 3645183 A1 EP3645183 A1 EP 3645183A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
wedge
inner displacement
cross
tool according
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
EP18745490.5A
Other languages
German (de)
English (en)
Other versions
EP3645183B1 (fr
Inventor
Sören Müller
Maik NEGENDANK
Vidal SANABRIA
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.)
Technische Universitaet Berlin
Original Assignee
Technische Universitaet Berlin
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 Technische Universitaet Berlin filed Critical Technische Universitaet Berlin
Publication of EP3645183A1 publication Critical patent/EP3645183A1/fr
Application granted granted Critical
Publication of EP3645183B1 publication Critical patent/EP3645183B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/08—Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation
    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/217—Tube 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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/04—Mandrels

Definitions

  • the present invention relates to a bridge tool for producing extruded profiles with varying cross-section.
  • Extrusion is a forming process for the manufacture of
  • a compact (block) heated to forming temperature is pressed with a punch through a die.
  • the block is enclosed by a recipient.
  • the outer shape of the pressed strand is determined by the die.
  • the punch pushes the block along the inner surface of the recipient in the direction of the die.
  • the recipient is closed on one side, and from the other side is pressed onto the block, the die, which is located at the head of a hollow punch.
  • the strand passes through the punch bore. Their diameter thus limits the circumscribing circle of the profile cross-section.
  • the pressing force is not applied directly to the block by a die, but rather by an active medium (water or oil).
  • Extrusion process via chamber or bridge tools are generated, wherein the bridge tools comprise a Matrizen- and a mandrel part.
  • the outer contour as already stated, determined by the die and the internal shaping of the mandrel.
  • the mandrel itself is not directly connected to the extruder, but via support arms or bridges with the mandrel part of the tool. In doing so, the block itself first passes through the into the mandrel part
  • Profile cross section can be generated.
  • the profiles are oversized in many places, since the profiles must always be formed in accordance with the requirements of the highest stress location over their entire length.
  • a disadvantage of a solution according to DE 10 02 18 81 A2 is that although a device comprising a chamber tool is disclosed, which should allow a varying cross-section of the extruded profile, but the entire mandrel, which has a large length for technical reasons, must be moved axially. The resulting long lever arms cause relatively large oscillations of the mandrel. However, such vibrations prevent production of profiles with high precision and tight tolerance requirements. Furthermore, it is disadvantageous that the durability of a mandrel according to DE 10 02 18 81 A1 is reduced. Such a mandrel is subject in use high thermomechanical stresses, which depend in particular on the occurring pressing forces and forming temperatures. Above all, the long Dorntragarm is exposed to alternating tensile and bending forces, which can be superimposed on local thermal stresses.
  • the object of the present invention is now to overcome the drawbacks of the prior art, and in particular to provide a device to produce profiles with a variable profile cross-section with high precision, since only with such a high precision over-dimensioning of the profiles effective can be avoided, wherein the device is designed and set up so as to optimally to the thermo-mechanical stresses
  • a bridge tool for a device for direct extrusion of hollow profiles with variable wall thickness comprising a die and at least one
  • Mandrel element with a die opening facing the first end and an opposite second end, wherein the outer
  • Mandrel element is fixed, wherein the at least one mandrel element has at least one recess in which is mounted movably mounted in the axial direction, an inner displacement mandrel, wherein the inner displacement mandrel in its first end of the mandrel element facing first end region has different cross sections.
  • the invention is based on the surprising finding that a generation of hollow profiles with varying inner diameter can be realized when the mandrel is built in several parts, with a movable inner displacement mandrel with different cross-sections is included at its end portions, the axial movement results in a change of the inner cross section of the hollow profile.
  • Displacement mandrel has the smallest cross-section at its first end, so that an axial displacement of the inner displacement mandrel in the direction of the die or in the die to a lesser extent
  • Wall thickness of the hollow profile leads, since the forming gap between inner displacement mandrel and die is reduced.
  • the disadvantages of the prior art are overcome by the at least two parting of the mandrel.
  • the inner displacement mandrel can by means of connecting elements via short lever arms with
  • Drive elements are brought into operative connection to allow the axial displacement of the same, so that vibrations of the mandrel are minimized. It may also be provided that vibrations of the inner displacement mandrel can be almost completely prevented by special guide elements.
  • the inner sliding mandrel according to the invention thus enables a
  • An axial displacement basically describes a displacement in the pressing direction or parallel to the pressing direction, a radial displacement a radial displacement relative to the pressing direction.
  • Displacement mandrel opposite the second end portion of the inner displacement mandrel extends, wherein one, in particular almost, perpendicular to the at least one mandrel element arranged transverse slide comprises is that in the at least one second recess at least
  • a cross slide according to the invention can be used for transmitting a force from a drive device to the inner displacement mandrel, wherein the drive device preferably outside the actual bridge tool, for example, on the outer wall of the transducer or the holder of the bridge tool, can be arranged.
  • Drive device is engageable or can be brought, wherein the drive device is designed and arranged to move the cross slide and the inner displacement mandrel in the axial direction.
  • a first cross member is disposed at a first radial end of the cross slide and a second cross member at a second, the first radial end opposite radial end of the cross slide is arranged, wherein the first cross member with a first drive device and / or the second cross member with a second drive device in
  • Active compound can be brought or stands.
  • Cross slide arranged cross beams can be a uniform, parallel transmission of power from the drive devices on the inner displacement mandrel and at the same time tilting the same be prevented.
  • both cross members can be connected or connected to a single drive device.
  • the first and / or the second drive device is designed in the form of a linear drive, in particular in the form of a hydraulic cylinder.
  • the inner displacement mandrel in the region of its first end in the axial direction sections a trapezoidal or
  • the present invention is not limited to the exemplified trapezoidal or triangular cross-sections. Instead, their cross section is determined as a function of the number of movable displacement elements.
  • triangular cross-section a value in the range of 5 to 25 °, preferably from 8 to 15 °, particularly preferably of 10 °.
  • the optimal angle can be, even outside of the preferred ranges,
  • the inner displacement mandrel is at or in the region of its first end with at least one wedge-shaped element in operative connection or this in particular, the further pitch angle ⁇ of the inner sliding mandrel facing side of the at least one wedge-shaped element is less than or equal to the pitch angle ß, so that an axial displacement of the inner sliding mandrel in a
  • Displacement mandrel for changing the inner cross section of a hollow profile to be used on at least one wedge-shaped element whose radial displacement relative to the inner displacement mandrel directly affects the wall thickness of the hollow profile.
  • the inner cross section and the wall thickness of the hollow profile can be varied by a virtually free configurability of the at least one wedge-shaped element.
  • the wedge-shaped element according to the invention can be different
  • Have base surfaces and the acute angle of the wedge can be formed by two or more sides.
  • Elements makes it possible to simultaneously change the wall thickness on two sides of a hollow profile. It is obvious that more than 2 wedge-shaped elements can be used, which can be grouped radially around the inner displacement mandrel.
  • wedge-shaped element is connected by means of a first dovetail guide with the mandrel element, wherein the at least one first
  • Dovetail guide allows movement of the at least one wedge-shaped element exclusively in the radial direction, wherein the dovetail guide in particular of the
  • Mandrel element and the at least one wedge-shaped element is formed.
  • Displacement mandrel leads with its varying in the axial direction of cross section exclusively to a radial movement of the at least one wedge-shaped element. Furthermore, tilting of the wedge-shaped element is prevented and reproducibility of the
  • Displacement mandrel and the at least one wedge-shaped element by means of a second formed in the axial direction
  • Dovetail guide are connected, so that an axial
  • the second dovetail guide offers the particular advantage that a secure connection between the inner displacement mandrel and the at least one wedge-shaped element is provided. Furthermore, the second dovetail guide is particularly advantageous because it not only ensures that, when the inner displacement mandrel moves in the direction of or into the die, there is a radial movement of the at least one wedge-shaped one
  • Dorn element and the at least one inner displacement mandrel form a third dovetail guide in the axial direction, so that the inner displacement mandrel and the mandrel member by means of a
  • Dovetail guide are interconnected.
  • Displacement mandrel is prevented even with a concern high forces.
  • the invention also provides a device for direct extrusion comprising a bridge tool according to the invention.
  • the invention provides a use of a
  • Bridge tool for producing one or more extruded profiles with variable in the pressing direction
  • Cross slide which in turn is connected by means of two opposite cross members with linear drives, can be moved axially. If the cross slide is moved axially, thus, so to speak, the inner Displacement pin moved in the axial extrusion direction.
  • Wedge-shaped elements deflect this axial movement, preferably by means of a second dovetail guide, into a radial movement arranged perpendicular to the axial movement. This leads to a spreading of the wedge-shaped elements and this wedge movement of the forming gap between the wedge-shaped element and die is reduced and consequently reduces the wall thickness of the hollow profile.
  • Fig. 1 A perspective view of an embodiment of a bridge tool according to the invention
  • Fig. 2 is a schematic plan view of the bridge tool according to
  • FIG. 1 A first figure.
  • Fig. 3 is a schematic side sectional view of the bridge tool according to Figure 1;
  • FIG. 1 shows a perspective view of an embodiment of a bridge tool according to the invention.
  • This comprises a transducer 1, on whose outer sides two linear drives 2 are arranged in the form of hydraulic cylinders. Each of the linear drives 2 is connected to a cross member 3, which ends at two opposite sides of a cross slide 4 and are positively connected thereto.
  • the gap between a mandrel element 5 and the die 6 defines the wall thickness of the hollow profiles to be produced.
  • the die 6 is attached to a pressure plate 7.
  • the mandrel element 5 additionally comprises wedge-shaped elements 8 and an inner displacement element 9.
  • Recess 10 is arranged, which extends in the axial direction and to which two second recesses 11 for the cross slide. 4
  • Displacement of the inner displacement mandrel 9 leads to a radial movement of the wedge-shaped elements 9 and thus to a change in the gap between the mandrel element 5 and the die 6. By this change in the gap, the cross section of the hollow profile to be produced changes.
  • first dovetail guide 13 for the wedge-shaped elements 8 and two second dovetail guides 14 are shown in FIG.
  • These first dovetail guides 13 ensure that the wedge-shaped elements 8 can move only in the radial direction, while the second dovetail guides 14 allow, in addition to radially outwardly acting pressure forces with a displacement of the inner displacement pin 9 and tensile forces of the inner sliding mandrel 9 and the wedge-shaped elements 8 can be transmitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

L'invention concerne un outil de type pont pour un dispositif servant à extruder directement des profilés creux à épaisseur de paroi variable. L'outil de type pont comprend une matrice (6) et au moins un élément formant mandrin (5) pourvu d'une première extrémité tournée vers l'ouverture de matrice et d'une seconde extrémité opposée. Le contour de profilé extérieur d'un profilé creux est fixé par la géométrie de l'ouverture de matrice, et la section transversale intérieure d'un profilé creux est fixée par l'élément formant mandrin ou les éléments formant mandrin (5). L'invention est caractérisée en ce que l'élément formant mandrin ou les éléments formant mandrin (5) comportent au moins un évidement, dans lequel un mandrin coulissant intérieur est disposé de manière mobile dans une direction axiale. Le mandrin coulissant intérieur présente, dans sa première zone d'extrémité tournée vers la première extrémité de l'élément formant mandrin, des sections transversales différentes.
EP18745490.5A 2017-06-28 2018-06-26 Outil de type pont servant à produire des profilés extrudés à section transversale variable Active EP3645183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017114371.8A DE102017114371A1 (de) 2017-06-28 2017-06-28 Brückenwerkzeug zur erzeugung von strangpressprofilen mit variierendem querschnitt
PCT/DE2018/100586 WO2019001635A1 (fr) 2017-06-28 2018-06-26 Outil de type pont servant à produire des profilés extrudés à section transversale variable

Publications (2)

Publication Number Publication Date
EP3645183A1 true EP3645183A1 (fr) 2020-05-06
EP3645183B1 EP3645183B1 (fr) 2024-04-03

Family

ID=63012772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18745490.5A Active EP3645183B1 (fr) 2017-06-28 2018-06-26 Outil de type pont servant à produire des profilés extrudés à section transversale variable

Country Status (5)

Country Link
US (1) US20200147661A1 (fr)
EP (1) EP3645183B1 (fr)
CN (1) CN110891704B (fr)
DE (1) DE102017114371A1 (fr)
WO (1) WO2019001635A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113020309B (zh) * 2021-04-14 2023-01-20 烟台大学 一种挤压速率、挤压温度和挤压比可连续变化的梯度热挤压装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053274A (en) * 1975-01-28 1977-10-11 Lemelson Jerome H Tube wall forming apparatus
US3997176A (en) * 1975-09-19 1976-12-14 Borg-Warner Corporation Expansible mandrel
JPS57130719A (en) * 1981-02-02 1982-08-13 Sumitomo Metal Ind Ltd Hot extrusion forming method for inside stepped tube
JPH0531525A (ja) * 1991-07-26 1993-02-09 Sumitomo Light Metal Ind Ltd 耐摩耗性アルミニウム合金中空材の押出製造方法
JP3328409B2 (ja) * 1994-01-14 2002-09-24 新日本製鐵株式会社 可変断面押出用ダイスまたは中子
US5836197A (en) * 1996-12-16 1998-11-17 Mckee Machine Tool Corp. Integral machine tool assemblies
DE10021881A1 (de) 2000-05-05 2001-11-15 Honsel Profilprodukte Gmbh Verfahren und Vorrichtung zum Herstellen von Strangpreßprofilen
JP4386322B2 (ja) * 2001-01-31 2009-12-16 本田技研工業株式会社 異形断面を有する管材の押出成形方法および管材押出成形用ダイス
JP4285053B2 (ja) * 2003-04-11 2009-06-24 Ｊｆｅスチール株式会社 高寸法精度管およびその製造方法
CN102500632B (zh) * 2011-09-30 2014-11-05 南京理工大学 利用劈尖原理实现管材高压切变的方法及其装置

Also Published As

Publication number Publication date
US20200147661A1 (en) 2020-05-14
WO2019001635A1 (fr) 2019-01-03
CN110891704A (zh) 2020-03-17
EP3645183B1 (fr) 2024-04-03
CN110891704B (zh) 2022-04-22
DE102017114371A1 (de) 2019-01-03

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