EP0998359A1 - Procede et dispositif pour mouler une structure cannelee dans une piece tubulaire - Google Patents

Procede et dispositif pour mouler une structure cannelee dans une piece tubulaire

Info

Publication number
EP0998359A1
EP0998359A1 EP98938688A EP98938688A EP0998359A1 EP 0998359 A1 EP0998359 A1 EP 0998359A1 EP 98938688 A EP98938688 A EP 98938688A EP 98938688 A EP98938688 A EP 98938688A EP 0998359 A1 EP0998359 A1 EP 0998359A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
pressure
rollers
wall thickness
pressure rollers
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Withdrawn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
EP98938688A
Other languages
German (de)
English (en)
Inventor
Bernd Stein
Karl-Heinz Pütz
Heinz Steinhauer
Wilhelm Zimmermann
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.)
Dynaform GmbH
Original Assignee
Dynamit Nobel GmbH
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 Dynamit Nobel GmbH filed Critical Dynamit Nobel GmbH
Publication of EP0998359A1 publication Critical patent/EP0998359A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • 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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves

Definitions

  • the invention relates to a pressure-rolling device and a method for forming a groove structure, such as a thread or a toothing, into the inner surface of a tubular workpiece.
  • the workpiece is placed on a cylindrical molding tool provided with a thread or a toothing, while several pressure rollers run around the outside of the molding tool and the workpiece, thus pressing the workpiece into the contour of the molding tool and stretching it under a feed.
  • a flow forming process of the metal takes place between the molding tool and the pressure rollers, the original wall thickness of the workpiece being reduced and the length being increased.
  • DE-OS 24 20 014 describes a so-called ironing press method.
  • a workpiece located on a tool mandrel is pressed by at least three pressure rollers rotating around the workpiece and subject to an axial feed against the molding tool, which has an external thread or toothing, so that an internal thread or toothing is formed in the workpiece.
  • the driven pressure rollers are located in a radial plane of the molding tool, ie the three identical pressure rollers act on the same peripheral area of the workpiece. Since the molding tool is rotated relative to the pressure rollers, a relatively large torsional force acts on the workpiece, which leads to twisting of the workpiece during the plastic deformation by the pressure rollers. The torsion of the workpiece results in a loading 'stung the forming structure of the mold, whereby the life of the mold considerably reduced becomes. Under certain circumstances, the shape structure may shear.
  • the invention has for its object to improve the production of tubular workpieces with an inner groove structure in such a way that the torsion of the workpiece and thus the load on the mold is significantly reduced.
  • the last pressure roller of at least 30 °, in particular of the inlet angle is about 50% greater than that of the first pressure roller.
  • Fig. 2 is a rear view according to the arrow II in Figure 1
  • Fig. 3 shows a longitudinal section through the pressure rolling device.
  • the pressure rolling device 1 shown in FIG. 1 has a cylindrical molding tool 2, on the outer surface of which a helical groove structure 3 is applied.
  • the molding tool 2 consists of hardened steel or hard metal.
  • Three pressure rollers 4, 5, 6 run around the molding tool 2.
  • the pressure rollers 4, 5, 6 are slightly axially spaced from one another, so that the first pressure roller 4 in the feed direction first hits a workpiece 7 located on the molding tool 2.
  • the pressure rollers 4,5,6 are each about 0.1 to 5 mm apart, which in contrast to a roller width of e.g. 70 to 80 mm is slight. Offset does not mean that the rollers have a distance between them, but that e.g. the respective points of attack of the pressure rollers 4,5,6 are offset by 0.1 to 5 mm ⁇ i.e. that the orbits of the pressure rollers 4,5,6 overlap.
  • the workpiece 7 is hollow cylindrical in the unprocessed initial state and is placed on the end of the molding tool 2, its inside diameter being dimensioned such that it rests on the raised groove structures 3.
  • the molding tool 2 rotates, taking the workpiece 7 fastened to it, and the pressure rollers 4, 5, 6, which are fastened to a feed slide (not shown here), are subject to feed in the axial direction.
  • the pressure rollers 4, 5, 6 are pressed radially against the workpiece 7 so that it is plastically deformed.
  • the pressure rollers 4,5,6 are pivoted into the plane of the drawing for better illustration.
  • the actual arrangement is shown in FIG. 2.
  • the three pressure rollers 4, 5, 6 are circumferentially equidistant, ie there is a circumferential angle of 120 ° between them.
  • the pressure rollers 4, 5, 6 are rotatably mounted, the three pressure rollers 4, 5, 6 being driven in the same direction with the molding tool 2 (in FIG. 2 counterclockwise). This leads to the fact that under the contact pressure e.g. the pressure roller 4 material of the workpiece 7, which has become plastic, is to a certain extent slowed down between the pressure roller 4 and the molding tool 2 and is thereby better pressed into the roller structure 3.
  • the first pressure roller 4 first comes into contact with the workpiece 7. It lies against the workpiece 7 with a conical pressing surface 8. By axial feed, the wall thickness of the workpiece 7 is reduced by the first pressure roller 4 by the thickness d 4 , starting from an original wall thickness S 0 .
  • the first pressure roller 4 runs on helical paths over the surface of the workpiece 7.
  • the feed and the rotational speed at which the pressure roller 4 turns the workpiece 7 are matched to one another such that the pressure roller 4 covers the entire surface of the workpiece 7.
  • the Inlet angle ⁇ 4 of the first pressure roller 4 lies in an angular range from 5 to 30 ° and is preferably 20 °.
  • the entry angle is the angle between the pressing surface 8 and the outer surface of the workpiece 7.
  • the pressing surface 9 of the second pressure roller 5 has the same geometry.
  • the pressing surface 10 of the third pressure roller 6 runs at an entry angle o 6 that is greater than the entry angle or 4 ( C- 5 of the first pressure rollers 4, 5 ).
  • the entry angle 6 is in the range from 10 ° to 40 ° and is preferably 30 ° .
  • a contact area 11 adjoins the pressing surface 10 and merges into an outlet surface 12 of the pressure roller 6.
  • the first and second spinning rollers 4, 5 also each have a transition region with the radii R 4 and R 5 , where these radii correspond to the radius R 6 .
  • the run-out surfaces run at a run-out angle ß u ßs i ßs with respect to the outer wall of the workpiece 7.
  • the run-out angles ß of the pressure rollers 4, 5, 6 are of the same size and lie in an angular range from 0 ° to 15 °, preferably 3 ° to 5 °.
  • the offset w4, w5, w6, that is to say the respective axial distance between the pressure rollers 4, 5, 6 is in each case 0.1 to 5 mm.
  • the pressure rollers 4, 5, 6 have a different radial distance from the forming tool 2 or from the workpiece 7.
  • the first pressure roller 4 has the greatest distance since it processes the workpiece 7 first.
  • the original wall thickness S 0 of the workpiece 7 is reduced by the amount d 4 .
  • the input end of the pressing surface 9 of the second pressure roller 5 now engages.
  • the wall thickness is reduced by the amount d 5 through the pressing surface 9 of the second pressure roller 5.
  • the last pressure roller 6 reduces the wall thickness by the amount d 6 until the desired target wall thickness S 1 of the workpiece 7 is reached.
  • the wall thickness of the workpiece 7 is thus reduced from the original wall thickness S 0 to the target wall thickness S- L .
  • the reduction in wall thickness d is composed of the individual reductions d 4 , d 5 , d 6 , each individual reduction being 0.2 to 0.4 times the total reduction d.
  • the shape of the inner groove structure also runs in sections. At the beginning of the press-rolling operation, the workpiece 7 rests on the raised groove structure 3 of the molding tool 2 ′′ .
  • the wall thickness S 0 of the workpiece 7 corresponds to the following formula:
  • S x is the end wall thickness and m is the tooth module of the molding tool 2, which corresponds to the flank spacing of two adjacent grooves divided by ⁇ .
  • the first pressure roller 4 presses the material of the workpiece 7 somewhat into the groove structure 3 of the molding tool 2.
  • the pressure roller 5 presses the material further into the groove structure 3, while the last pressure roller 6 completely fills the groove structure 3 with the material of the workpiece 7 and sets the desired target wall elements S x .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'emboutissage au tour (1) servant à mouler une structure cannelée dans une pièce tubulaire (7), qui présente plusieurs rouleaux presseurs (4, 5, 6) tournant autour d'un outil de façonnage (2) et décalés les uns par rapport aux autres dans le sens axial et dont au moins deux rouleaux presseurs (4, 5) sont entraînés en sens inverse l'un par rapport à l'autre. Cette configuration permet d'éviter dans une large mesure toute torsion de la pièce.
EP98938688A 1997-07-19 1998-07-04 Procede et dispositif pour mouler une structure cannelee dans une piece tubulaire Withdrawn EP0998359A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19731055A DE19731055A1 (de) 1997-07-19 1997-07-19 Vorrichtung und Verfahren zum Einformen einer Rillenstruktur in ein rohrförmiges Werkstück
DE19731055 1997-07-19
PCT/EP1998/004148 WO1999003618A1 (fr) 1997-07-19 1998-07-04 Procede et dispositif pour mouler une structure cannelee dans une piece tubulaire

Publications (1)

Publication Number Publication Date
EP0998359A1 true EP0998359A1 (fr) 2000-05-10

Family

ID=7836252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98938688A Withdrawn EP0998359A1 (fr) 1997-07-19 1998-07-04 Procede et dispositif pour mouler une structure cannelee dans une piece tubulaire

Country Status (5)

Country Link
US (1) US6295854B1 (fr)
EP (1) EP0998359A1 (fr)
JP (1) JP2001510093A (fr)
DE (1) DE19731055A1 (fr)
WO (1) WO1999003618A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062002B4 (de) * 2000-12-13 2006-11-09 Leifeld Metal Spinning Gmbh Verfahren zum Drückwalzen sowie Drückwalzvorrichtung
DE10217848A1 (de) * 2002-04-22 2003-11-06 Hay Tec Automotive Gmbh & Co K Verfahren zur Herstellung von Schiebemuffen für Schaltgetriebe
US7165430B2 (en) * 2004-03-03 2007-01-23 Makino, Inc. Method and apparatus for patterning of bore surfaces
US7316142B2 (en) * 2004-05-21 2008-01-08 Lancaster Paul B Metal spin forming head
US7090445B2 (en) * 2005-01-18 2006-08-15 Makino, Inc. Tool with selectively-biased member
US7717652B2 (en) * 2005-01-18 2010-05-18 Makino, Inc. Tool with selectively-biased member having an adjustment feature
US8042370B2 (en) * 2006-02-07 2011-10-25 Ronjo, Llc Flow formed gear
US7806635B2 (en) * 2007-03-07 2010-10-05 Makino, Inc. Method and apparatus for producing a shaped bore
CN105880440B (zh) * 2016-05-18 2018-09-11 常州市环华机械有限公司 内螺纹管的冷轧方法
CN111229834A (zh) * 2020-02-25 2020-06-05 沈阳时代传感器科技有限公司 一种自收缩带筋紧固管套及其制备方法

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US3149512A (en) * 1960-06-30 1964-09-22 William H Leinbach Method of rolling a tubing with a controlled wall thickness
DE2420014A1 (de) * 1973-06-07 1975-01-02 France Etat Verfahren zur herstellung von zuegen oder riefen in der innenflaeche von koerpern mit gerader oder gebogener mantellinie waehrend einer verformung durch abstreckdruekken, sowie vorrichtung zur durchfuehrung dieses verfahrens
DE2551156A1 (de) * 1975-11-14 1977-05-26 Hermanns Gebr Kremo Werke Verfahren und vorrichtung zur herstellung von kreisquerschnitt-hohlkoerpern mit in laengsachse verlaufenden inneren nuten, rillen oder kerben
SU893361A1 (ru) * 1979-07-09 1981-12-30 Предприятие П/Я В-2869 Способ холодной поперечной прокатки полых профильных изделий
SU1294444A2 (ru) * 1982-03-16 1987-03-07 Предприятие П/Я Р-6758 Способ изготовлени полых осесимметричных деталей
DE3402301A1 (de) * 1984-01-24 1985-08-01 Fritz Prof. Dr.-Ing. 5450 Neuwied Fischer Vorrichtung und verfahren zum drueckwalzen
JPS6127109A (ja) * 1984-07-18 1986-02-06 Nippon Steel Corp 長柱体成形装置
DE3700758A1 (de) * 1987-01-13 1988-07-21 Gd Anker Gmbh & Co Kg Verfahren zur formung eines gewindes und rohrkoerper mit gewinde
DE4007406C2 (de) * 1990-03-06 1994-01-20 Mannesmann Ag Verfahren zur Herstellung von mittel- und dünnwandigen nahtlosen Rohren und Walzeinrichtung zur Durchführung des Verfahrens
US5428980A (en) * 1991-08-26 1995-07-04 Iidaka; Tsuguo Method and apparatus for producing cap for drink bottle
DE4446919A1 (de) * 1994-12-28 1996-07-04 Dynamit Nobel Ag Verfahren zur Herstellung von innenverzahnten Teilen
DE19636567C2 (de) * 1996-09-09 2001-07-26 Leico Werkzeugmaschb Gmbh & Co Verfahren zum Drückwalzen eines Getriebeteiles mit einer Innenverzahnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9903618A1 *

Also Published As

Publication number Publication date
JP2001510093A (ja) 2001-07-31
DE19731055A1 (de) 1999-01-21
US6295854B1 (en) 2001-10-02
WO1999003618A1 (fr) 1999-01-28

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