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EP2367645A1 - Method and rolling die for producing a screw having a variable thread pitch - Google Patents

Method and rolling die for producing a screw having a variable thread pitch

Info

Publication number
EP2367645A1
EP2367645A1 EP11701451A EP11701451A EP2367645A1 EP 2367645 A1 EP2367645 A1 EP 2367645A1 EP 11701451 A EP11701451 A EP 11701451A EP 11701451 A EP11701451 A EP 11701451A EP 2367645 A1 EP2367645 A1 EP 2367645A1
Authority
EP
European Patent Office
Prior art keywords
thread pitch
implemented
screw
producing
thread
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
EP11701451A
Other languages
German (de)
French (fr)
Other versions
EP2367645B1 (en
Inventor
Ulrich Hettich
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.)
Ludwig Hettich and Co
Original Assignee
Ludwig Hettich and Co
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 Ludwig Hettich and Co filed Critical Ludwig Hettich and Co
Priority to PL11701451T priority Critical patent/PL2367645T3/en
Publication of EP2367645A1 publication Critical patent/EP2367645A1/en
Application granted granted Critical
Publication of EP2367645B1 publication Critical patent/EP2367645B1/en
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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Transmission Devices (AREA)
  • Metal Rolling (AREA)

Abstract

The invention relates to a method for producing a screw (26) having a continuous thread (28) of variable thread pitch, wherein a blank (16) is rolled between two rolling dies (24), wherein a roller profile is implemented in each rolling die, comprising a group of curved, non-parallel recesses (34). The recesses (34) are implemented and arranged so that zero or as little as possible volume transport takes place in the axial direction during rolling, or a volume transport from an area of the blank at which a thread segment having greater thread pitch is to be implemented, into an area in which a thread segment having a smaller thread pitch is to be implemented.
EP11701451A 2010-01-14 2011-01-14 Method and rolling die for producing a screw having a variable thread pitch Active EP2367645B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11701451T PL2367645T3 (en) 2010-01-14 2011-01-14 Method and rolling die for producing a screw having a variable thread pitch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010000084A DE102010000084A1 (en) 2010-01-14 2010-01-14 Method and means for producing a variable pitch screw
PCT/EP2011/000154 WO2011085999A1 (en) 2010-01-14 2011-01-14 Method and rolling die for producing a screw having a variable thread pitch

Publications (2)

Publication Number Publication Date
EP2367645A1 true EP2367645A1 (en) 2011-09-28
EP2367645B1 EP2367645B1 (en) 2012-11-14

Family

ID=43735749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701451A Active EP2367645B1 (en) 2010-01-14 2011-01-14 Method and rolling die for producing a screw having a variable thread pitch

Country Status (8)

Country Link
US (1) US9017176B2 (en)
EP (1) EP2367645B1 (en)
CA (1) CA2786923A1 (en)
DE (1) DE102010000084A1 (en)
ES (1) ES2397625T3 (en)
MX (1) MX2012008224A (en)
PL (1) PL2367645T3 (en)
WO (1) WO2011085999A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9511414B2 (en) * 2010-07-14 2016-12-06 Illinois Tool Works Inc. Thread forming die and method
CN104289646B (en) * 2013-07-17 2015-12-23 卢小璇 Forming mold for anti-loosening screws
JP6472120B2 (en) * 2014-02-18 2019-02-20 株式会社ＮｅｊｉＬａｗ Die structure for rolling both screw bodies, rolling method for both screw bodies
US9757792B1 (en) * 2014-04-09 2017-09-12 Mark Doll Method for making a die for roll forming a dual threaded bolt
CN110216425B (en) * 2019-06-18 2020-08-07 湖南工学院 Machining method for precisely machining variable-groove-width threads through single teeth

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE57269C (en) * THE AMERICAN screw COMPANY in Providence, Rhode Island, V. St. A Work piece and roller plate for the production of screws
JPS4838066B1 (en) * 1970-04-15 1973-11-15
DE2941507A1 (en) * 1979-10-12 1980-10-23 Jungheinrich Kg ARRANGEMENT FOR GUIDING A FREE-MOVING VEHICLE ALONG A GUIDELINE DESIGNED AS A GUIDE WIRE
DE602004004057T2 (en) * 2004-01-26 2007-07-12 Ho, Jen-Tong Screw with a variety of helixes and dies for their manufacture
DE102007035183B4 (en) 2007-07-27 2010-05-12 Ludwig Hettich & Co. Generation of a systematic residual stress distribution in components by introducing screws or threaded rods with a longitudinally variably changing thread pitch
US9511414B2 (en) * 2010-07-14 2016-12-06 Illinois Tool Works Inc. Thread forming die and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011085999A1 *

Also Published As

Publication number Publication date
EP2367645B1 (en) 2012-11-14
US9017176B2 (en) 2015-04-28
CA2786923A1 (en) 2011-07-21
WO2011085999A1 (en) 2011-07-21
DE102010000084A1 (en) 2011-07-21
US20120309548A1 (en) 2012-12-06
MX2012008224A (en) 2012-08-17
PL2367645T3 (en) 2013-03-29
ES2397625T3 (en) 2013-03-08

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