FR2398211A1 - Vis autoforeuse et autotaraudeuse - Google Patents

Vis autoforeuse et autotaraudeuse

Info

Publication number
FR2398211A1
FR2398211A1 FR7735246A FR7735246A FR2398211A1 FR 2398211 A1 FR2398211 A1 FR 2398211A1 FR 7735246 A FR7735246 A FR 7735246A FR 7735246 A FR7735246 A FR 7735246A FR 2398211 A1 FR2398211 A1 FR 2398211A1
Authority
FR
France
Prior art keywords
self
cutting edges
drilling
adequate support
drill
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
FR7735246A
Other languages
English (en)
Other versions
FR2398211B1 (fr
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.)
Mustad & Figlio SpA
Original Assignee
Mustad & Figlio SpA
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 Mustad & Figlio SpA filed Critical Mustad & Figlio SpA
Publication of FR2398211A1 publication Critical patent/FR2398211A1/fr
Application granted granted Critical
Publication of FR2398211B1 publication Critical patent/FR2398211B1/fr
Granted 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
    • F16B25/0036—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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Drilling Tools (AREA)

Abstract

Cette vis est caractérisée en ce que l'intersection de la surface de dépouille arrière 32, 34, 36 de chaque arête racleuse 22 avec chaque plan perpendiculaire à l'axe X-X de la pointe 18 est définie, selon le sens opposé au sens normal de rotation normal F de la vis, en partant du point anguleux d'intersection de l'arête 22 avec le plan, par une ligne composite qui comprend un premier segment 32 de faible longueur à angle de dépouille faible, un second segment 34 de faible longueur à grand angle de dépouille et une troisième segment incurvé 36 qui se rapproche progressivement du cercle fictif, centré sur l'axe X-X de la vis, sur lequel se trouve ledit point anguleux, jusqu'à devenir tangent à ce cercle C en un point 38 situé à une distance angulaire de ce point anguleux égale ou peu inférieure à 90 degrés .
FR7735246A 1977-07-21 1977-11-23 Vis autoforeuse et autotaraudeuse Granted FR2398211A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6870377A IT1083022B (it) 1977-07-21 1977-07-21 Vite autoforante ed autofilettante

Publications (2)

Publication Number Publication Date
FR2398211A1 true FR2398211A1 (fr) 1979-02-16
FR2398211B1 FR2398211B1 (fr) 1982-05-28

Family

ID=11310335

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7735246A Granted FR2398211A1 (fr) 1977-07-21 1977-11-23 Vis autoforeuse et autotaraudeuse

Country Status (2)

Country Link
FR (1) FR2398211A1 (fr)
IT (1) IT1083022B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521234A1 (fr) * 1982-02-05 1983-08-12 Usm Corp Vis perforante et auto-taraudeuse
US5074729A (en) * 1990-07-23 1991-12-24 Kokubu Kagaku Kogyo Co., Ltd. Drill screw having cutting edges each forming an arc curving to a head side
US6142719A (en) * 1998-03-30 2000-11-07 Hilti Aktiengesellschaft Self-drilling screw

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1075971A (fr) * 1952-04-19 1954-10-21 Raimondi Acciai S P A Mèche hélicoïdale et son procédé de fabrication
DE2060051A1 (de) * 1969-12-23 1971-07-01 Schraubenkombinat Veb Bohrtreibschraube
US4016795A (en) * 1973-08-18 1977-04-12 Gkn Screws & Fasteners Limited Self-drilling screws

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1075971A (fr) * 1952-04-19 1954-10-21 Raimondi Acciai S P A Mèche hélicoïdale et son procédé de fabrication
DE2060051A1 (de) * 1969-12-23 1971-07-01 Schraubenkombinat Veb Bohrtreibschraube
US4016795A (en) * 1973-08-18 1977-04-12 Gkn Screws & Fasteners Limited Self-drilling screws

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521234A1 (fr) * 1982-02-05 1983-08-12 Usm Corp Vis perforante et auto-taraudeuse
US5074729A (en) * 1990-07-23 1991-12-24 Kokubu Kagaku Kogyo Co., Ltd. Drill screw having cutting edges each forming an arc curving to a head side
US6142719A (en) * 1998-03-30 2000-11-07 Hilti Aktiengesellschaft Self-drilling screw

Also Published As

Publication number Publication date
FR2398211B1 (fr) 1982-05-28
IT1083022B (it) 1985-05-21

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Legal Events

Date Code Title Description
ST Notification of lapse