EP2659151A1 - Vis et procédé de fabrication de ladite vis - Google Patents

Vis et procédé de fabrication de ladite vis

Info

Publication number
EP2659151A1
EP2659151A1 EP12710479.2A EP12710479A EP2659151A1 EP 2659151 A1 EP2659151 A1 EP 2659151A1 EP 12710479 A EP12710479 A EP 12710479A EP 2659151 A1 EP2659151 A1 EP 2659151A1
Authority
EP
European Patent Office
Prior art keywords
screw
tip
cone
screw shaft
shaft
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Withdrawn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
EP12710479.2A
Other languages
German (de)
English (en)
Inventor
Günter Stiebitz
Leander WALLECK
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.)
SWG Schraubenwerk Gaisbach GmbH
Original Assignee
SWG Schraubenwerk Gaisbach 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 SWG Schraubenwerk Gaisbach GmbH filed Critical SWG Schraubenwerk Gaisbach GmbH
Publication of EP2659151A1 publication Critical patent/EP2659151A1/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Withdrawn legal-status Critical Current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
    • F16B25/0015—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 a soft organic material, e.g. wood or plastic
    • 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
    • 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
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action

Definitions

  • the invention relates to a screw with a arranged at one end of the screw shaft screw tip, which has the shape of a cone.
  • a screw for use in deformable materials such as wood, composites, plastic or the like.
  • This screw has a screw tip which is formed in the longitudinal direction of the screw as a section, in particular as half of a cone.
  • the cone tip lies in the longitudinal axis of the screw shaft. This is to reduce the resistance when screwing in the screw and the risk of blasting of the component (EP 1 820 978, EP 1 903224 A2).
  • the recess is machined.
  • the thread continues into the screw tip.
  • the invention proposes a screw with the features of claim 1 and / or a screw with the features of claim 2 and / or a method with the features of the method claim.
  • the invention proposes to produce the special shape of the screw tip, namely a cone only partially formed by pinching between at least two pinch jaws, ie by a deformation of the material and not by a machining process. This reduces the manufacturing effort and also leads to a suitable shape of the recess.
  • the flattening on the side of the conical tip runs obliquely with respect to a plane lying in the longitudinal axis of the screw shank.
  • the lateral planar flattening of the screw tip merges into the outside of the screw shaft via a radius of curvature or a curved shape within the screw shaft. So there is no sharp limitation of the limited by the flattening recess on the side of the apex. The recess continues into the screw shaft.
  • the thread continues into the conical screw tip, can be inventively provided that the screw tip is free of a thread.
  • the thread thus ends at the transition between the screw shaft and the screw tip.
  • the flattening runs slightly curved, in particular concavely curved.
  • the apex angle of the screw tip ie the cone angle, is in the range of about 50 ° to about 70 °, preferably about 60 °.
  • the invention also proposes a method for producing such a screw.
  • a head is formed at one end of the contact pin, for example by upsetting.
  • This head may also have a screw drive recess.
  • An external shape of the screw head for connection to a screw-in tool is also possible.
  • At the other end will be - - The screw tip shaped.
  • the screw tip takes the form of a partial cone, in particular a circular cone with a lateral flattening, which lies in a plane. Only after making the screw tip is a thread rolled on the screw shank.
  • the free end of the wire pin is brought between two pinching jaws and the two pinching jaws moved towards each other to form the cone apex with the lateral flat flattening to form the cone tip.
  • One of the two jaws has a recess which corresponds to the shape of the partial cone, while the other Kneifbacken has a flat counter surface. This mating surface can also be concave or convex.
  • the attachment of the flattening can be done so that the plane in which the flattening lies, with respect to a plane lying in the longitudinal axis of the screw at a distance.
  • the invention also proposes the use of a screw as described herein for oblique screwing into workpieces.
  • Figure 1 is a side view of a screw according to the invention.
  • Figure 3 shows the side view of a blank for the production of
  • FIG. 5 shows the blank after the production of the screw tip with the pincushion jaws
  • FIG. 6 shows, on an enlarged scale, a section through the assembled pincushion jaws
  • Figure 7 is a view of the jaws from above in Figure 5 and FIG.
  • FIG. 9 shows a representation corresponding to FIG. 5 of a second one
  • FIG. 10 shows a representation of the second corresponding to FIG - -
  • Figure 1 1 is a representation corresponding to Figure 7 of the second
  • FIG. 12 shows the illustration of the second, corresponding to FIG.
  • Figure 1 3 is a view of the screw tip from the left in Figure 2 and
  • the screw shown in Figure 1 in side view includes a screw shaft 1 with a screw thread 2.
  • a screw head 3 is formed, for example by upsetting a wire pin from which the screw is made.
  • the screw thread 2 extends in the illustrated case over the entire length of the screw shaft.
  • a screw tip 4 is formed, which is made by deforming the wire pin.
  • the screw tip 4 contains the shape of a cone with a lateral recess.
  • the cone tip has a cone angle of approximately 60 °.
  • a recess 6 is formed which is delimited by a flattening 7.
  • the flattening 7 is rectilinear within the screw tip, so that the flattening 7 is within the screw tip 4 in a plane.
  • This plane encloses an angle of about 5 to 10 ° with a plane lying in the screw longitudinal axis.
  • the conical tip 8 is offset from the longitudinal axis of the screw, which is indicated in Figure 2, laterally, in the direction of the recess 6.
  • the flattening 7 within the screw tip 4 then goes through a curved boundary surface 9 in the outside of the 0 Screw shaft 1 over.
  • the recess 6 extends beyond the screw tip 4 also in the shaft. 1
  • the longitudinal extent of the recess 6 within the screw shaft is approximately the same size as the axial extent of the screw tip 4th
  • This screw is particularly suitable for screwing at an acute angle relative to the surface of a workpiece.
  • the edge between the surface of the apex 4 and the flattening 7 forms a cutting edge, which extends obliquely in a side view from a direction transverse to the view of Figure 2.
  • the edge between the surface 10 of the screw shaft 1 and the recess 6 also forms a cutting edge.
  • FIG. 3 shows a blank for producing the screw, which has already been provided with a screw head 3 and a screw tip 4, but which does not yet have a thread. The thread is therefore rolled up only after the manufacture of the screw tip 4. - -
  • FIG. 4 shows, on an enlarged scale, the front end of the screw blank.
  • the later screw tip 4 has a flat flattening 7, which limits the recess 6 within the conical screw tip 4.
  • the flattening 7 runs parallel to a lying in the longitudinal axis of the blank plane. This plane has a distance from the longitudinal axis of the screw blank.
  • the conical tip 8 is still formed as a full cone within a short distance. The partial cone shape thus arises at a certain distance from the apex eighth
  • FIG. 5 shows the blank for producing the screw immediately after it has been formed in conjunction with two pinching jaws 10, 11.
  • FIG. 6 shows a partial section through the arrangement of the pinching jaws 10 and 11 in FIG. 5.
  • a recess 13 is formed which, in its region 14 extending from the surface 12, is formed as a cylindrical part of a circular cylinder.
  • the median plane 15 of the circular cylinder is indicated by dash-dotted lines.
  • the recess thus goes slightly beyond this center plane 15.
  • a conical portion 16 which also extends beyond the median plane 15 also.
  • the shape of the section 16 thus corresponds to the shape of the future screw tip 4 in FIG. 3 and FIG. 4.
  • the section 16 thus also has a conical tip 18.
  • the second pinching jaw 1 1 has a flat counter surface 19, which is arranged parallel to the median plane 1 5 of the circular cylinder and the circular cone.
  • a view of the jaws 10, 1 1 from above in Figure 5 and 6 shows the figure 7.
  • the recess 13 has a cross section which is slightly larger than a semicircle. This is not apparent from the figure 7 in the scale used here, but from Figure 6.
  • 21 are formed in both Kneifbacken that absorb the resulting pinching of the screw tip 4 slugs.
  • FIG. 8 shows a perspective view of the state during the manufacture of the screw, after the later screw tip 4 has been produced by the pinching jaws 10, 11.
  • FIG. 9 similar to FIG. 5, shows the blank for producing the screw immediately after it has been formed, namely above two pinching jaws 30, 31.
  • the most important part of the two jaws is in - - Enlarged scale shown in Figure 1 0.
  • a recess 33 is formed, which is formed in its outgoing from the surface 12 region 34 as a cylindrical part of a circular cylinder.
  • the center plane of this circular cylinder coincides with the separation point between the two pinching jaws 30, 31 and is identified by the reference numeral 35.
  • a conical portion 36 connects, which extends to the opposite interface.
  • the second jaw 31 has a flat counter surface 39 which lies in the median plane 35 of the circular cylinder 34 and the front cone-shaped portion 36.
  • the jaw 31 has a continuation of the conical portion 36 in such a way that a conical tip 38 is formed, which is offset from the central plane, in the direction of the conical portion 36 gone.
  • the mating jaw 31 having the mating surface 39 has a shallow depression 40 in the region of the surface 12, that is to say on the side where the blank is arranged, in order to facilitate the transition of the flattened tip 4.
  • This shallow depression 40 which corresponds in cross-sectional form to the cylindrical region 34, can also be seen in FIG. 11, which represents the plan view of the surface 12 of the two pinching jaws 30 and 31.
  • the mating surface 39 is flat. It is also within the scope of the invention, this counter surface 39 or in the embodiment of Figure 6, the counter surface 19 concave or convex form.
  • the screw tip is delimited by two edges converging in the direction of the screw tip, which run symmetrically with respect to the longitudinal axis of the screw.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Forging (AREA)

Abstract

L'invention concerne une vis et son procédé de fabrication, le bout pointu (4) de la vis comportant un évidement (7) latéral. Cet évidement (7) s'étend de la zone avant de la tige de la vis jusqu'à l'intérieur du bout conique pointu (4) de la vis. L'étendue axiale de l'évidement (7) à l'intérieur de la tige cylindrique (1) de la vis est sensiblement identique à l'étendue axiale du bout pointu (4) de la vis. L'extrémité du bout conique pointu (4) de la vis est décalée latéralement en direction de l'évidement (7) par rapport à l'axe longitudinal de la vis. Le bout pointu (4) de la vis peut être réalisé par déformation à froid, par serrage entre deux mâchoires.
EP12710479.2A 2011-03-21 2012-03-16 Vis et procédé de fabrication de ladite vis Withdrawn EP2659151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005862A DE102011005862A1 (de) 2011-03-21 2011-03-21 Schraube und Verfahren zu ihrer Herstellung
PCT/EP2012/054655 WO2012126825A1 (fr) 2011-03-21 2012-03-16 Vis et procédé de fabrication de ladite vis

Publications (1)

Publication Number Publication Date
EP2659151A1 true EP2659151A1 (fr) 2013-11-06

Family

ID=45878928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12710479.2A Withdrawn EP2659151A1 (fr) 2011-03-21 2012-03-16 Vis et procédé de fabrication de ladite vis

Country Status (3)

Country Link
EP (1) EP2659151A1 (fr)
DE (1) DE102011005862A1 (fr)
WO (1) WO2012126825A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012219121A1 (de) * 2012-10-19 2014-05-08 Adolf Würth GmbH & Co. KG Verfahren und Kneifbackenpaar zum Herstellen einer Bohrspitze

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7526151U (de) * 1977-03-03 Carl Bauer Gmbh & Co, 5600 Wuppertal Selbstbohrende Schneidschraube
DE2800620A1 (de) * 1978-01-07 1979-07-12 Itw Ateco Gmbh Bohrschraube
DE2913482A1 (de) * 1979-04-04 1980-10-16 Frank Knoche Selbstbohrende schraube
FR2669062B1 (fr) * 1990-11-14 1997-10-24 Prospection Invention Tech Element de fixation pour materiau de type platre.
DE4445806C1 (de) * 1994-12-21 1996-08-29 Sfs Ind Holding Ag Loch- und gewindeformende Schraube sowie Verfahren zum Eindrehen derselben
DE102004018069A1 (de) * 2004-04-08 2004-08-26 Rensburg, Markus, Dipl.-Wirtsch.-Ing. Schraube insbesonder Holzsenkschraube und Verfahren zu deren Herstellung
AT503341B1 (de) 2006-02-16 2008-02-15 Schmid Schrauben Hainfeld Ges Schraube zur verwendung bei verformbaren werkstoffen, wie holz, verbundwerkstoffen und kunststoffen
DE102006026176A1 (de) * 2006-05-29 2007-12-06 Adolf Würth GmbH & Co. KG Selbstbohrende Schraube
EP1903224B1 (fr) 2006-09-22 2012-02-01 Schmid Schrauben Hainfeld Gesellschaft m.b.H. Vis destiné à la fixation d'au moins une première pièce à une deuxième pièce

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012126825A1 *

Also Published As

Publication number Publication date
DE102011005862A1 (de) 2012-09-27
WO2012126825A1 (fr) 2012-09-27

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