EP2343138A1 - Dispositif et procédé destinés au formage de pièces - Google Patents

Dispositif et procédé destinés au formage de pièces Download PDF

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Publication number
EP2343138A1
EP2343138A1 EP10000210A EP10000210A EP2343138A1 EP 2343138 A1 EP2343138 A1 EP 2343138A1 EP 10000210 A EP10000210 A EP 10000210A EP 10000210 A EP10000210 A EP 10000210A EP 2343138 A1 EP2343138 A1 EP 2343138A1
Authority
EP
European Patent Office
Prior art keywords
forming
preform
workpiece
forming tool
tool
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
EP10000210A
Other languages
German (de)
English (en)
Other versions
EP2343138B1 (fr
Inventor
Karl-Heinz Köstermeier
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.)
REPKON MACHINE AND TOOL INDUSTRY AND TRADE INC.
Original Assignee
Repkon Machine And Tool Industry & Trade Ltd
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.)
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Publication date
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Application filed by Repkon Machine And Tool Industry & Trade Ltd filed Critical Repkon Machine And Tool Industry & Trade Ltd
Priority to ES10000210.4T priority Critical patent/ES2543005T3/es
Priority to EP20100000210 priority patent/EP2343138B1/fr
Priority to PCT/EP2011/000035 priority patent/WO2011085948A1/fr
Priority to CN201180004696XA priority patent/CN102712023A/zh
Priority to US13/521,298 priority patent/US10124388B2/en
Publication of EP2343138A1 publication Critical patent/EP2343138A1/fr
Application granted granted Critical
Publication of EP2343138B1 publication Critical patent/EP2343138B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/06—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a discontinuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions

Definitions

  • the invention relates to a device for forming workpieces according to the preamble of claim 1 and a method for forming workpieces according to claim 8.
  • a workpiece is set in rotation and then formed by rolling or rolling from outside to the workpiece.
  • these workpieces are designed as rotationally symmetrical hollow body.
  • the hollow bodies may have unilaterally closed bottoms.
  • this transformation takes place in such a way that the outer forming rollers press the shell of the hollow body-shaped workpiece against an internal mandrel, so that the material is made to flow within a forming zone between the forming tools axially, radially and tangentially.
  • the wall thickness of the shell is reduced.
  • the reshaped hollow body is guided over its entire length on the inner mandrel, so that at least 50% of the finished workpiece are on the inner mandrel after the forming. Depending on the process, 100% of the length of the workpiece may also be on the inner mandrel.
  • the pressing of the material against the inner mandrel during the forming has the disadvantage that a very high friction arises between the inner surface of the workpiece and the surface of the inner mandrel.
  • the friction in turn leads to adverse heating of the workpiece and inner mandrel.
  • the wear of the surface during the forming process due to the friction stress.
  • the ideal outer diameter of the inner mandrel must be found by experiments, which makes expensive subsequent corrections to the outer diameter of the inner mandrel required.
  • the production of workpieces with different inner diameters at different wall thicknesses within a workpiece with an internal mandrel is excluded.
  • a split internal mandrel which is attached to each of the main spindle and tailstock spindle, is required.
  • such a device with split internal mandrel is expensive.
  • the possible contour of the workpiece is also limited, since even a split mandrel allows only a limited design freedom of the inner contour of the workpiece to be formed.
  • the object of the invention is to provide a method that makes the shaping of rotationally symmetrical workpieces with constant and different wall thicknesses at different outside and inside diameters possible, and to provide an apparatus for performing this method, in which the mentioned disadvantages do not occur or to a lesser extent.
  • the device has an inner forming tool that is rotatable about a main machine axis and is mounted coaxially with the machine main axis of the device.
  • the inner forming tool is fastened to a holder which can be displaced in the axial longitudinal direction and which can itself be rotatably mounted with or independently of the inner forming tool.
  • a number of outer forming rollers which can be moved and positioned according to a predetermined workpiece contour, engage in the region of the inner forming tool from the outside against the lateral surface of the preform.
  • the preform is received by a pick-up device, which is preferably simultaneously a centering device that also centers the preform.
  • the internal forming tool is provided with an outer contour, which allows to specify by the axial positioning of the outer forming tools relative to the inner forming tool, the axial position of the forming zone on the inner forming tool and thus due to the contouring of the inner forming tool specify the inner diameter of the workpiece by the relative axial position of the outer and the inner forming tool to each other. Due to the radial positionability of the outer forming tools, the outer workpiece diameter and thus the wall thickness at each position along the machine main axis x can be predetermined in addition to the inner workpiece diameter.
  • the inner forming tool 9 preferably consists essentially of an inner forming roller or has at least one roller which represents the element of the forming tool 9 that acts on the workpiece 4 from the inside.
  • the outer contour 9.2 of the inner forming tool 9 can be cylindrical, conical, convex or concave, depending on how the workpiece 4 to be formed requires it.
  • the inner diameter of the workpiece Depending on the relative axial position of the inner forming tool 9 to the outer forming tools 8, the forming zone migrates in the axial direction on the surface contour of the inner forming tool 9.
  • the relative position can be chosen so that at the forming zone always engages a region of the outer contour of the inner Umfortechnikmaschines 9, in which the effective outer diameter of the inner forming tool 9 is equal to or minimally smaller than the desired inner diameter of the workpiece 4 at the respective position.
  • the inner forming roller 9 is guided axially to the position of the outer forming rollers 8 by a holder 5 centrally in the main spindle 1.1 and continuously movable in relation to the outer forming rollers 8.
  • the inner forming roller 9 and outer forming rollers 8 can be performed in a constant axial position to each other during the forming.
  • the inner forming roller 9 moves axially relative to the outer forming rollers 8 until the desired inner diameter at the respective point of the workpiece 4 is reached.
  • the preform 3 can be kept centered by a driven carrier 11 of the axially movable main spindle box 1 and axially, for example, with the centering 7 of the tailstock 2, braced.
  • a suitable tensioning device 14 which is preferably a pressure cylinder, may be provided.
  • the outer forming tools 8 may be radially guided in a housing, not shown, and may, preferably by means of CNC axes, which specify the radial position of the forming tools 8, follow predetermined travel movements. In this case, the outer contour of the desired workpiece 4 results from the radial positions at the respective axial position of the preform.
  • the number of possible outer forming tools 8 results from the geometric outer dimensions of the forming tools in relation to the outer diameter of the workpiece 4.
  • the maximum diameter of the inner forming tool 9 is limited by the inner diameter of the preform.
  • outer forming rollers 8 The axial position of the outer forming rollers 8 to the inner forming tool 9, for example, by manual adjustment of the outer forming tools 8 to be matched and with each other.
  • these outer forming rollers 8 in the axial direction in fixed position to each other, preferably at least as long as the desired contour of the workpiece 4 no adjustment of the axial Positions of individual forming tools to each other during the forming requires.
  • the clamped preform 3 can be centered by the driver 11 of the main spindle 1.1 and / or the internal forming tool 9.
  • the tension can be effected by a pressure device 14, for example a pressure cylinder, of the tailstock 2.
  • the outer Umformtechnikzuge 8 can be moved back to an initial position.
  • the inner forming tool 9 is located axially in the forming position in the area of the outer forming tools 8.
  • the unit formed by the bias can now be moved axially by the feed device 15 of the main spindle box 1, which is preferably designed as a feed cylinder against the pressure of the pressure device 14 in the forming position.
  • the unit may already be offset in rotation about the main machine axis or be.
  • the inner forming tool 9 can stand axially in forming position to the outer forming rollers 8.
  • the outer forming tools 8 can then be moved radially in the forming position.
  • Main spindle box 1 with rotating main spindle 1.1, preform 3 and tailstock 2 can thus form a unit which together by the axial force of the feed device 15, which is preferably a feed cylinder, with a controlled feed in the axial direction relative to the outer forming tools 8 can be moved.
  • the feed device 15 which is preferably a feed cylinder
  • the forming tools 8 As soon as the forming tools 8 are in the forming position, they can cause the material of the wall thickness W0 of the preform 3 to flow in the radial, tangential and axial directions due to the radial contact pressure of the outer forming tools 8 and the resistance of the inner forming tool 9.
  • the radial distance of the engaging to the inner contour of the workpiece 4 area 9.1 of the outer contour of the mecanicumformwerkmaschines 9 and the outer contour of the workpiece 4 engaging portion of the outer forming tools 8 to each other results in the forming wall thickness W1 of the workpiece to be manufactured in the respective axial position of Preform 3 before.
  • the desired outer diameter with the predetermined wall thickness W1 can form in this axial position.
  • the inner diameter of the workpiece 4 to be produced in each axial position of the workpiece 4 is predetermined by the contact diameter 9.1 of the distance of the engaging to the contour of the workpiece 4 region of the outer contour of the mecanicumformwerkmaschines 9 of the machine main axis x in the respective axial position results.
  • the pressure device 14 which is preferably a pressure cylinder, press back.
  • the pressure device 14 may be designed so that the back pressure is regulated and / or controllable. It is also possible to provide a Andschreibverinrung 10, which is preferably guided centrally to the main axis.
  • the outer diameter of the workpiece to be manufactured with the wall thickness W1 is specified at the respective axial position of the workpiece 4 by the respective radial position and dimensioning of the outer forming tools 8.
  • the wall thickness W1 of the workpiece 4 to be produced results at the respective axial position of the workpiece 4 through the contact diameter 9.1 of the internal forming tool 9.
  • the inner diameter of the workpiece 4 to be formed can be set in the respective axial position.
  • the inner diameter is smaller when the contact diameter 9.1 is smaller, that is, the axial position of the mecanicalmaschinemaschines 9 relative to the axial position of the outer forming tools 8 changes such that the forming zone on the outer contour of the inner forming tool in a region with smaller, on the Shapes inner contour of the workpiece 4 attacking, effective tool diameter.
  • a greater wall thickness can be formed without the outer forming rollers 8 changing their radial position.
  • the molded wall thickness W1 can be reduced without the outer forming tools 8 changing their radial position.
  • the outer forming rollers 8 also change their radial position to a larger shaped outer diameter corresponding to the inner diameter of the workpiece 4 resulting from the new axial relative position of the inner forming roller 9 due to the outer contour of the inner forming tool 9, then with a constant wall thickness a larger outer diameter than before Changing the radial position of the outer forming rollers 8 and the axial position of the inner forming roller 9 are formed.
  • the outer forming tools 8 can go back to the starting position. Subsequently, the unit of main spindle box 1, tailstock and finished part 4 can go back to the unloading position. The finished workpiece 4 can now be relaxed and removed.
  • the inner forming tool 9 it is also possible for the inner forming tool 9 to have a shape on the inner contour of the workpiece 4, which makes it possible to contour the inner contour not only axially but also in the circumferential direction.
  • Such circumferential inner contouring 4.1 can be, for example, axially extending inner ribs.
  • One possibility of realizing such an inner forming tool is a forming tool, preferably a roller, with a surface contoured on the inner contour of the workpiece 4 in the circumferential direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP20100000210 2010-01-12 2010-01-12 Dispositif et procédé destinés au formage de pièces Active EP2343138B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES10000210.4T ES2543005T3 (es) 2010-01-12 2010-01-12 Dispositivo y procedimiento para el moldeado de piezas de trabajo
EP20100000210 EP2343138B1 (fr) 2010-01-12 2010-01-12 Dispositif et procédé destinés au formage de pièces
PCT/EP2011/000035 WO2011085948A1 (fr) 2010-01-12 2011-01-07 Dispositif et procédé de façonnage de pièces
CN201180004696XA CN102712023A (zh) 2010-01-12 2011-01-07 用于成形工件的装置和方法
US13/521,298 US10124388B2 (en) 2010-01-12 2011-01-07 Device and method to shape worked pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100000210 EP2343138B1 (fr) 2010-01-12 2010-01-12 Dispositif et procédé destinés au formage de pièces

Publications (2)

Publication Number Publication Date
EP2343138A1 true EP2343138A1 (fr) 2011-07-13
EP2343138B1 EP2343138B1 (fr) 2015-04-22

Family

ID=42236356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100000210 Active EP2343138B1 (fr) 2010-01-12 2010-01-12 Dispositif et procédé destinés au formage de pièces

Country Status (5)

Country Link
US (1) US10124388B2 (fr)
EP (1) EP2343138B1 (fr)
CN (1) CN102712023A (fr)
ES (1) ES2543005T3 (fr)
WO (1) WO2011085948A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3025802A1 (fr) 2014-11-28 2016-06-01 Repkon Machine and Tool Industry and Trade Inc. Dispositif et procédé pour le fluotournage de pièces à usiner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184676A (en) * 1985-12-20 1987-07-01 Man Technologie Gmbh Rolling tube walls
US20030046803A1 (en) * 2001-08-10 2003-03-13 Ryuichi Kaneko Manufacturing method of cylinder
DE102007002228A1 (de) * 2007-01-10 2008-07-31 Benteler Automobiltechnik Gmbh Verfahren und Vorrichtung zur Herstellung von innenprofilierten Rohren
EP2210682A1 (fr) 2009-07-09 2010-07-28 Leifeld Metal Spinning GmbH Méthode et appareil de fluotournage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5435190B2 (ja) * 2007-03-30 2014-03-05 日立オートモティブシステムズ株式会社 管体の加工方法及びシリンダ装置の製造方法
EP2127775B1 (fr) * 2008-05-26 2010-02-24 Repkon Machine and Tool Industry & Trade Ltd. Procédé et maschine de fluotournage pour la fabrication de pièces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184676A (en) * 1985-12-20 1987-07-01 Man Technologie Gmbh Rolling tube walls
US20030046803A1 (en) * 2001-08-10 2003-03-13 Ryuichi Kaneko Manufacturing method of cylinder
DE102007002228A1 (de) * 2007-01-10 2008-07-31 Benteler Automobiltechnik Gmbh Verfahren und Vorrichtung zur Herstellung von innenprofilierten Rohren
EP2210682A1 (fr) 2009-07-09 2010-07-28 Leifeld Metal Spinning GmbH Méthode et appareil de fluotournage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3025802A1 (fr) 2014-11-28 2016-06-01 Repkon Machine and Tool Industry and Trade Inc. Dispositif et procédé pour le fluotournage de pièces à usiner
US10569321B2 (en) 2014-11-28 2020-02-25 Repkon Machine and Tool Industry and Trade Inc. Device and method for flow-forming workpieces

Also Published As

Publication number Publication date
US10124388B2 (en) 2018-11-13
US20120285215A1 (en) 2012-11-15
ES2543005T3 (es) 2015-08-13
EP2343138B1 (fr) 2015-04-22
WO2011085948A8 (fr) 2012-06-07
WO2011085948A1 (fr) 2011-07-21
CN102712023A (zh) 2012-10-03

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