EP3004665A1 - Taraud et matrice de laminage - Google Patents

Taraud et matrice de laminage

Info

Publication number
EP3004665A1
EP3004665A1 EP14719029.2A EP14719029A EP3004665A1 EP 3004665 A1 EP3004665 A1 EP 3004665A1 EP 14719029 A EP14719029 A EP 14719029A EP 3004665 A1 EP3004665 A1 EP 3004665A1
Authority
EP
European Patent Office
Prior art keywords
thread
screw
grooves
furchabschnitts
threads
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Withdrawn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
EP14719029.2A
Other languages
German (de)
English (en)
Inventor
Bernd Werthwein
Werner JOHANNING
Georg Vogel
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.)
Arnold Umformtechnik GmbH and Co KG
Original Assignee
Arnold Umformtechnik GmbH and Co KG
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 Arnold Umformtechnik GmbH and Co KG filed Critical Arnold Umformtechnik GmbH and Co KG
Publication of EP3004665A1 publication Critical patent/EP3004665A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • 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
    • B21H3/027—Rolling of self-tapping screws
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip

Definitions

  • the invention is based on a screw with a self-tapping thread.
  • Such screws produce in the material in which they are screwed, their thread by a deformation, ie without a cutting process, itself.
  • the material flows due to the displacement through the thread edges in the grooves formed by the thread edges between them.
  • a rolling die is already known in which the size of the profile angle enclosed by the flanks of the grooves decreases continuously in a forming region along the grooves (DE 10 201 1 003 252 A1). This should be achieved with high reliability and high production speed a particularly good screw quality.
  • a furrow zone is provided which extends from the front end of the screw and is intended to facilitate the insertion of the screw into an existing hole.
  • the same thread is formed as in the supporting portion of the screw, but its diameter is reduced.
  • the invention is based on the object to provide a thread former or a thread-forming or thread-forming screw in which the load capacity of the counter-thread formed therewith is increased.
  • the invention proposes a thread former, in particular a screw with the features mentioned in claim 1 and / or a rolling die with the features mentioned in claim 14. Further developments of the invention are the subject of the respective subclaims.
  • the screw or a thread former thus contains, starting from its or its front end, a furrow section in which the threads or the grooves formed between the threads are made flatter.
  • the flatter shape of the threads and / or the grooves formed between them gradually approaches the desired final shape of the threads and grooves within the screw-in, in particular gradually.
  • the thread within the Furchabitess have a constant slope, which the kon- - - constant slope within the bearing section of the screw shaft is the same.
  • the thread has an increasing thread height within the Furchabitess, so that the groove formed between the thread edges in the direction from the front end to the supporting portion of the screw shaft is deeper.
  • the thread is formed sharp-edged within the Furchabitess.
  • the Furchabites has the shape of a truncated cone or a cone, so that thus the thread edges of the thread in Furchabites lie on the lateral surface of a cone. This also helps with the invention of the desired continuous deformation of the counter-thread to avoid craters.
  • the cone angle of the furrow section may be in a range of about 8 ° to about 14 °.
  • the length of the furrow section should be such that the desired crater formation is reduced to a level that no longer bothers them.
  • the length of the Furchabitess corresponds approximately to the nominal diameter of the screw. In other words, about 4 to 6 turns of the screw thread may be within the furrow section.
  • the thread is a symmetrical thread, which for - -
  • the formation of the counter thread provides particularly good results.
  • the invention is also applicable to other types of threads, for example in trapezoidal threads, round threads, fine threads, coarse threads, asymmetric threads, etc.
  • flank angle begins at the front end of the screw, for example at 60 °. Then the flanks forming the groove between the thread edges form an angle of 120 °.
  • flank angle of the thread can be at 30 °, so that the two groove flanks form an angle of 60 °. This angle can then continue over the holding portion of the screw shaft.
  • the invention also proposes a rolling jaw or a pair of rolling dies for producing such a screw.
  • the rolling jaw thus includes a first furrow thread portion which has a constant width and adjoins the longitudinal edge of the rolling die, which is associated with the front end of the screw.
  • first furrow thread portion which has a constant width and adjoins the longitudinal edge of the rolling die, which is associated with the front end of the screw.
  • the grooves in - - The furrow thread area are less deep than in bobgewinde Silver.
  • the Furchgewinde Scheme of the rolling die in turn is subdivided into a plurality of subsections of constant width, in which the profile of the grooves for producing the threads increasingly approaches the final shape. Within each subsection, the profile shape is constant.
  • the change and thus approximation between the beginning of the thread form and the final shape should have at least one step, preferably between 2 and 6 steps.
  • the change in the flank angle should preferably be between one-twentieth and one-half of the respective subsequent thread flank angle.
  • the angle change can be linear, or not linear.
  • Figure 1 is a side view of a front end of a screw according to the invention.
  • Figure 3 schematically shows the beginning of the formation of the counter-thread
  • Figure 4 shows the deformation of the counter-thread after another
  • Figure 5 shows the appearance of the counter thread after another
  • Figure 6 shows the formed mating thread at the end of the furrow section
  • FIG. 7 shows the counter thread when reaching the collar section of the screw
  • Figure 8 is a plan view of a rolling die according to the invention.
  • FIG. 9 shows the perspective view of the rolling die of FIG. 8
  • FIG. 1 shows the front end of a screw according to the invention.
  • the screw includes a screw shaft 1, which has a screw drive at its one end, not shown in Figure 1.
  • the opposite front end 2 is formed by a flat, perpendicular to the longitudinal axis of the screw end face.
  • the screw has a thread 3, which extends from the front end of the screw 2 on the screw shaft.
  • the screw shank 1 has a furrow section 4 in a region beginning at the front screw end 2, which extends over approximately four to five turns of the screw thread 3.
  • the grooves 6 formed between the edges 5 of the thread 3 are formed flatter than in the adjoining the Furchabites support portion 16.
  • the grooves formed by the thread flanks are V-shaped in cross section, wherein the groove bottom is rounded.
  • the thread edges 5 are connected by a line which is approximately rectilinear but oblique to the longitudinal axis of the screw.
  • the thread edges 5 are thus on the lateral surface of a cone or with a screw tip having no screw shape on the lateral surface of a truncated cone.
  • the workpiece 10 includes a previously drilled hole in the wall 1 1 is to be formed a thread.
  • the front end 2 of the screw corresponds approximately to the diameter of the hole.
  • FIG. 5 shows the situation at the third turn of the thread 3.
  • the material has flowed into the groove along the two thread flanks, but that a certain depression is formed between the two sections contacting the groove flanks.
  • FIG. 6 shows the situation at the fourth turn of the thread 3.
  • the two arrows F which act perpendicular to the thread flanks - -
  • FIG. 5 shows the situation at the fifth turn 5 of the thread 3.
  • the last groove 6 of the Furchabitess 4 is almost completely filled. Further penetration into the groove is technically hardly possible. The forces are now flatter again.
  • FIG. 8 shows a plan view of the working side of a rolling die. Screws or taps are formed between two dies, which are arranged in mirror image and enclose the wire pin from which the screw is made between them. The rolling jaws are displaced relative to each other, in the longitudinal direction, ie in a direction parallel to the longitudinal edge 17 of the rolling die.
  • the rolling jaw includes a plurality of grooves 18 which extend parallel to each other and obliquely to the longitudinal edge 17 and thus obliquely to the longitudinal direction or direction of movement of the rolling die.
  • the material of the wire pin is deformed into the grooves 18, thereby forming the threads of the thread.
  • the rolling jaw of Figure 8 includes a starting from the longitudinal edge 17 first region B + C + D, which extends over the entire length of the rolling die and has a constant width. At this The first area is then followed by the second area A, which is the screw thread area of the rolling die. In this area A, the grooves 18 have a constant angle between their groove flanks.
  • the first area is, as can be seen from the drawing, in turn divided into three subregions D, C, B, which also have constant width.
  • the grooves 18 are very flat.
  • the shape of the grooves 18 and the remaining parts of the surface of the rolling die are the same within the sub-region D.
  • the grooves 18 are no longer as flat as in the lower region D.
  • the angle between the flanks of the grooves in sub-area D is 120 °
  • sub-area C is 100 °
  • sub-area B is 80 °
  • area A is 60 °.
  • FIG. 9 shows the perspective view of such a rolling die.

Abstract

La présente invention concerne une vis autotaraudeuse, pourvue d'une tige (1) et d'un filet (3), qui comporte une section de taraudage (4) qui part de l'extrémité avant (2) de la vis (4) et qui s'étend sur une longueur axiale qui correspond approximativement à la taille nominale de la vis. Une partie de support du filet est raccordée à la section de taraudage. Dans la section de taraudage, dont la forme est de préférence légèrement conique, les gorges (6), formées par les flancs du filet entre les spires du filet, sont configurées pour être tout d'abord plus plates à partir de l'extrémité avant de la vis puis leur forme se rapproche de façon continue de la forme en coupe transversale plus raide dans la partie de support. Cette transition progressive permet à la vis de former un contre-filet qui autorise des contraintes plus élevées. L'invention concerne également une matrice de laminage destinée à la fabrication d'une telle vis ou d'un tel taraud.
EP14719029.2A 2013-06-06 2014-04-24 Taraud et matrice de laminage Withdrawn EP3004665A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013210527.4A DE102013210527A1 (de) 2013-06-06 2013-06-06 Gewindeformer und Walzbacken
PCT/EP2014/058401 WO2014195061A1 (fr) 2013-06-06 2014-04-24 Taraud et matrice de laminage

Publications (1)

Publication Number Publication Date
EP3004665A1 true EP3004665A1 (fr) 2016-04-13

Family

ID=50543612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14719029.2A Withdrawn EP3004665A1 (fr) 2013-06-06 2014-04-24 Taraud et matrice de laminage

Country Status (3)

Country Link
EP (1) EP3004665A1 (fr)
DE (1) DE102013210527A1 (fr)
WO (1) WO2014195061A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016002905U1 (de) 2016-04-29 2017-08-02 Arnold Umformtechnik Gmbh & Co. Kg Schraube
DE102017103073B4 (de) 2017-02-15 2022-08-11 Hieber & Maier GmbH Werkzeug zum Gewindewalzen einer gewindeformenden Schraube, Verfahren zum Herstellen einer lochformenden und/oder gewindeformenden Schraube, sowie eine gewindeformende und/oder lochformende Schraube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842923A (en) * 1995-06-14 1998-12-01 Minebea Kabushiki-Kaisha Screw and method for its production

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756647A (fr) * 1968-11-08 1971-03-25 Keystone Consolidated Ind Inc Vis taraudeuse.
US4040328A (en) * 1976-03-10 1977-08-09 Research Engineering & Manufacturing, Inc. Thread-forming fastener having dual lobulation and dies for making the same
GB1562385A (en) * 1976-10-11 1980-03-12 Thurston W Thread forming members
US4194430A (en) * 1978-05-05 1980-03-25 Research Engineering & Manufacturing, Inc. Thread-forming screw with step taper
DE4131165A1 (de) * 1991-09-19 1993-03-25 Schumacher Wilhelm Kg Gewindefurchende schraube sowie verfahren zum herstellen derselben und walzbacken zur durchfuehrung des verfahrens
DE29818546U1 (de) * 1998-10-17 1999-01-28 Werkzeugtechnik Niederstetten Flachwalzbacke
DE19857311A1 (de) * 1998-12-11 2000-06-15 Ejot Verbindungstech Gmbh & Co Selbstfurchende Schraube
DE102011003252A1 (de) * 2011-01-27 2012-08-02 Hilti Aktiengesellschaft Walzbacke

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842923A (en) * 1995-06-14 1998-12-01 Minebea Kabushiki-Kaisha Screw and method for its production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014195061A1 *

Also Published As

Publication number Publication date
DE102013210527A1 (de) 2014-12-11
WO2014195061A1 (fr) 2014-12-11

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