EP2481496A1 - Matrice de laminage - Google Patents

Matrice de laminage Download PDF

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Publication number
EP2481496A1
EP2481496A1 EP12150701A EP12150701A EP2481496A1 EP 2481496 A1 EP2481496 A1 EP 2481496A1 EP 12150701 A EP12150701 A EP 12150701A EP 12150701 A EP12150701 A EP 12150701A EP 2481496 A1 EP2481496 A1 EP 2481496A1
Authority
EP
European Patent Office
Prior art keywords
grooves
angle
profile
forming
profile angle
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
EP12150701A
Other languages
German (de)
English (en)
Other versions
EP2481496B1 (fr
Inventor
Jürgen Gebhard
Mirco Fleige
Corinna Achleitner
Simon Oppeneiger
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.)
Hilti AG
Original Assignee
Hilti AG
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP2481496A1 publication Critical patent/EP2481496A1/fr
Application granted granted Critical
Publication of EP2481496B1 publication Critical patent/EP2481496B1/fr
Active legal-status Critical Current
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Classifications

    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls

Definitions

  • An inventive rolling jaw is characterized in that at least a part of the grooves has a forming area in which the size of a profile angle enclosed by the flanks decreases continuously along the grooves.
  • the inventive type of tool design can be achieved by the inventive type of tool design that the thread precursors are built early in the vicinity of the inlet region, so that the highly stressed calibration area is relieved and thus the service life of the tools is increased.
  • the depth of the closing fold between the material beads, which are pushed by the adjacent webs can be reduced by improved material extension, so that the quality of the thread is increased.
  • the invention allows the production of screws with a large pitch and simultaneously large thread flank height without the tool length must be significantly increased, and without the production speed suffers significantly.
  • the profile angle ⁇ in the inlet region can be 80 ° to 120 °.
  • the size of the profile angle ⁇ changes over the forming range from large to small values to the value of the desired thread profile, i. preferably to values between 30 ° and 60 °.
  • the width of at least part of the grooves along the grooves preferably hyperbolic, varies. Accordingly, the width follows a predetermined, preferably hyperbolic, function in which the path is taken along the grooves. In particular, it may be provided that the width of at least part of the grooves along the grooves decreases steadily in the forming area. As a result, the thread quality can be further increased.
  • both the profile angle and the width of the grooves vary as described herein.
  • a further improvement, in particular in the reduction of Schliessfaltenianae, can be achieved by adjusting the profile depth Z of the grooves at each point of Umform Schemes the enclosed volume, in which case an influence of the pin elongation during rolling must be taken into account.
  • Such an auxiliary angle can by a still larger initial angle a further improved material flow in the Cause thread flank in, for example, to achieve a particularly good thread formation for large pitches and large thread flank heights.
  • the auxiliary angle (head area profile angle) can follow a predetermined function whose course can be defined depending on the foot profile angle ⁇ .
  • the auxiliary angle (head area profile angle) ⁇ can be, for example, between 100 ° and 140 °.
  • the depth of the head area can also be designed variably over the forming area. Suitable values for the depth of the head region may be, for example, 0.1-1 mm.
  • a pitch angle ⁇ between the grooves and the rolling jaw longitudinal axis varies at least in the forming region along the grooves. Accordingly, the pitch angle follows a predetermined function in which the path is taken along the grooves.
  • the invention also relates to a method for forming a screw thread on a screw blank, wherein the screw blank is reshaped by means of at least one rolling die according to the invention and in this case the screw thread is formed, and the screw produced thereby.
  • the screw blank is formed between two dies.
  • variable parameters which determine the geometry of the grooves are interpreted variably over the entire deformation range of the rolling die.
  • the variable parameters for the design of the wedge-shaped grooves can be in particular: ⁇ (profile angle), a (groove width) and Z (groove depth).
  • the initial values of the parameters are defined depending on the requirements of the desired thread profile and follow over the entire forming range of a defined, suitably continuous, function, preferably taking into account the volume constancy.
  • the parameters correspond to the desired thread profile.
  • the profile angle ⁇ and the groove width a preferably follow a hyperbolic function, which can be defined depending on the requirements of the desired thread profile.
  • the groove depth Z is defined. Due to the variable design of the profile angle ⁇ and the groove width a over the forming area, it is possible to generate an optimal material delay depending on the requirements of the desired thread profile.
  • the grooves in the forming area can be designed with a variable pitch angle ⁇ to the tool longitudinal axis.
  • ⁇ the pitch angle
  • the variably dimensioning of the profile parameters according to the invention offers on the one hand more possibilities in the production of screw threads with a large thread pitch and at the same time a large thread flank height, without enlarging the tool length or the forming area, and on the other hand relieving the deformation area in the vicinity of the calibration area, which leads to an increase in the Tool life contributes. This increases the production possibilities on existing capacities, whereby the production speed can be kept at a higher level.
  • FIG. 2 shows the course of the cross section of a groove 10 from FIG. 1 in the longitudinal direction 15 of the groove 10, the view bottom left in FIG. 2 the groove 10 at the section AA FIG. 1 shows, and the top right view in FIG. 2 the groove 10 at the section BB FIG. 1 , Accordingly, in FIG. 1 denotes the variables associated with the section AA with the index "A" and the variables associated with the section "BB” with the index "B".
  • the cross section of the groove 10 is in FIG. 2 hatched, and the course of the groove between the sections AA and BB results from the dotted lines which the cuts in FIG. 2 connect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Metal Rolling (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Extrusion Of Metal (AREA)
EP12150701.6A 2011-01-27 2012-01-11 Matrice de laminage Active EP2481496B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011003252A DE102011003252A1 (de) 2011-01-27 2011-01-27 Walzbacke

Publications (2)

Publication Number Publication Date
EP2481496A1 true EP2481496A1 (fr) 2012-08-01
EP2481496B1 EP2481496B1 (fr) 2013-12-04

Family

ID=45497848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12150701.6A Active EP2481496B1 (fr) 2011-01-27 2012-01-11 Matrice de laminage

Country Status (6)

Country Link
US (1) US9586255B2 (fr)
EP (1) EP2481496B1 (fr)
CN (1) CN102615226B (fr)
DE (1) DE102011003252A1 (fr)
ES (1) ES2443880T3 (fr)
TW (1) TWI593481B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014195061A1 (fr) * 2013-06-06 2014-12-11 Arnold Umformtechnik Gmbh & Co. Kg Taraud et matrice de laminage
IT202000032609A1 (it) * 2020-12-29 2022-06-29 F Lli Mauri Spa Coppia di utensili di rullatura di tiranti cilindrici e procedimento di rullatura tramite detti utensili

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210476C5 (de) * 2013-06-04 2021-04-29 Baier & Michels Gmbh & Co. Kg Verfahren zur Herstellung einer Schraube, insbesondere zur Verwendung in Kunststoffbauteilen
JP6472121B2 (ja) * 2014-02-18 2019-02-20 株式会社ＮｅｊｉＬａｗ 両ねじ体転造用ダイス構造、両ねじ体転造方法、両ねじ体転造用ねじ素材
JP6268471B2 (ja) * 2014-02-18 2018-01-31 株式会社ＮｅｊｉＬａｗ 両ねじ体転造用ダイス構造
JP6472120B2 (ja) * 2014-02-18 2019-02-20 株式会社ＮｅｊｉＬａｗ 両ねじ体転造用ダイス構造、両ねじ体転造方法
JP6278312B2 (ja) * 2014-04-08 2018-02-14 株式会社ＮｅｊｉＬａｗ 両ねじ体転造用ダイス構造、両ねじ体調整用ダイス構造、両ねじ体転造方法、両ねじ体調整方法。

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US618262A (en) * 1899-01-24 Die for rolling screw threads
US3069941A (en) 1960-01-06 1962-12-25 Elastic Stop Nut Corp Screw threading tool
DE1283791B (de) 1963-07-30 1968-11-28 Illinois Tool Works Walzbacken zum Herstellen eines Gewindes mit zwei Gaengen unterschiedlicher Gangtiefe auf einem Schraubenrohling
JPS4838066B1 (fr) * 1970-04-15 1973-11-15
GB2063740A (en) * 1979-11-30 1981-06-10 Gkn Fasteners Ltd Milling thread rolling dies
EP0533456B1 (fr) 1991-09-17 1996-04-03 PCC Specialty Products, Inc. Méthode et appareil de formation de filets
JPH1029030A (ja) * 1996-07-15 1998-02-03 Minebea Co Ltd ねじ転造用平ダイス
US6324887B1 (en) * 2000-05-02 2001-12-04 Lake Erie Screw Corp. Thread rolling dies and process for forming same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920693A1 (de) * 1968-04-25 1970-07-16 Jllinois Tool Works Inc Schraube sowie Verfahren und Vorrichtung zur Herstellung derselben
US3589157A (en) * 1969-01-31 1971-06-29 Burdsall & Ward Co Die mechanism for rolling threads on screw blanks
JPS4838066A (fr) 1971-09-16 1973-06-05
US3910099A (en) * 1973-12-26 1975-10-07 Standard Pressed Steel Co Die member
US4034586A (en) * 1976-05-24 1977-07-12 Colt Industries Operating Corporation Thread rolling die and method of thread rolling
US4798070A (en) * 1983-07-01 1989-01-17 Colt Industries Operating Corporation Combined thread rolling dies
US5182937A (en) * 1991-09-17 1993-02-02 Quamco, Inc. Seam-free thread rolling dies
US5735658A (en) * 1993-12-13 1998-04-07 Haerle; Anton Thread forming tool
US5943904A (en) * 1995-03-08 1999-08-31 Ingersoll Cutting Tool Company Thread-rolling die
FR2828419B1 (fr) * 2001-08-07 2003-10-24 Escofier Tech Sa Outil, machine et procede de formage a froid, perfectionnes
JP2005186129A (ja) * 2003-12-26 2005-07-14 Asmo Co Ltd ウォーム付きシャフトの製造方法、ウォーム付きシャフト、回転子及び回転電機
CN201015808Y (zh) * 2007-02-07 2008-02-06 常进工业股份有限公司 螺丝牙板组

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US618262A (en) * 1899-01-24 Die for rolling screw threads
US3069941A (en) 1960-01-06 1962-12-25 Elastic Stop Nut Corp Screw threading tool
DE1283791B (de) 1963-07-30 1968-11-28 Illinois Tool Works Walzbacken zum Herstellen eines Gewindes mit zwei Gaengen unterschiedlicher Gangtiefe auf einem Schraubenrohling
JPS4838066B1 (fr) * 1970-04-15 1973-11-15
GB2063740A (en) * 1979-11-30 1981-06-10 Gkn Fasteners Ltd Milling thread rolling dies
EP0533456B1 (fr) 1991-09-17 1996-04-03 PCC Specialty Products, Inc. Méthode et appareil de formation de filets
JPH1029030A (ja) * 1996-07-15 1998-02-03 Minebea Co Ltd ねじ転造用平ダイス
US6324887B1 (en) * 2000-05-02 2001-12-04 Lake Erie Screw Corp. Thread rolling dies and process for forming same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FLANAGAN J D ET AL: "FLACHBACKEN-GEWINDEWALZEN OHNE OBERFLACHENFEHLER. ÖFLAT DIE THREAD ROLLING WITHOUT SURFACE FAILURES", UMFORMTECHNIK, MEISENBACH, BAMBERG, DE, vol. 27, no. 4, 1 August 1993 (1993-08-01), pages 288/289, XP000396772, ISSN: 0300-3167 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014195061A1 (fr) * 2013-06-06 2014-12-11 Arnold Umformtechnik Gmbh & Co. Kg Taraud et matrice de laminage
IT202000032609A1 (it) * 2020-12-29 2022-06-29 F Lli Mauri Spa Coppia di utensili di rullatura di tiranti cilindrici e procedimento di rullatura tramite detti utensili

Also Published As

Publication number Publication date
EP2481496B1 (fr) 2013-12-04
ES2443880T3 (es) 2014-02-20
DE102011003252A1 (de) 2012-08-02
TW201242686A (en) 2012-11-01
CN102615226B (zh) 2016-04-27
TWI593481B (zh) 2017-08-01
US20120328393A1 (en) 2012-12-27
US9586255B2 (en) 2017-03-07
CN102615226A (zh) 2012-08-01

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