GB2005171A - Self-piercing and self-tapping screw - Google Patents

Self-piercing and self-tapping screw

Info

Publication number
GB2005171A
GB2005171A GB7839704A GB7839704A GB2005171A GB 2005171 A GB2005171 A GB 2005171A GB 7839704 A GB7839704 A GB 7839704A GB 7839704 A GB7839704 A GB 7839704A GB 2005171 A GB2005171 A GB 2005171A
Authority
GB
United Kingdom
Prior art keywords
self
thread
point
piercing
cutting
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Withdrawn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
GB7839704A
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.)
Terep Techn Res & Prod Eng Co
Original Assignee
Terep Techn Res & Prod Eng 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 Terep Techn Res & Prod Eng Co filed Critical Terep Techn Res & Prod Eng Co
Publication of GB2005171A publication Critical patent/GB2005171A/en
Withdrawn legal-status Critical Current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
    • F16B25/0036—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
    • 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
    • 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
    • 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
    • F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Dowels (AREA)
  • Drilling Tools (AREA)
  • Connection Of Plates (AREA)

Abstract

A self-piercing and self-tapping screw comprises a cone point 3 and a threaded portion 9 along its shank, with between the point and the thread a cylindrical gauging zone 11 having the same diameter as the minor diameter of the threaded portion; one or more cutting lips 4 with flat faces 5 increasing in diameter towards the thread are formed in the longitudinal direction of the point. The cutting lip edges lie in a common diametral plane or on different, spaced radial planes, a cavity being formed on the leading side of each cutting lip for receiving the shavings cut during the tapping operation. At least one projecting tooth 10 is formed on the portion of each cutting lip which is adjacent the screw shank, the section of each tooth corresponding to only one portion of the thread section 9. <IMAGE>
GB7839704A 1977-10-06 1978-10-06 Self-piercing and self-tapping screw Withdrawn GB2005171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1224277A CH616211A5 (en) 1977-10-06 1977-10-06

Publications (1)

Publication Number Publication Date
GB2005171A true GB2005171A (en) 1979-04-19

Family

ID=4381210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839704A Withdrawn GB2005171A (en) 1977-10-06 1978-10-06 Self-piercing and self-tapping screw

Country Status (8)

Country Link
JP (1) JPS5460641A (en)
BR (1) BR7806639A (en)
CH (1) CH616211A5 (en)
DE (1) DE2843470A1 (en)
FR (1) FR2405389A1 (en)
GB (1) GB2005171A (en)
IT (1) IT1099243B (en)
SE (1) SE7810509L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560304A1 (en) * 1984-02-24 1985-08-30 Yamahiro Co Ltd Self-tapping screw and die for forming its thread
GB2305703A (en) * 1995-09-27 1997-04-16 John Michael Pitts Screwthreaded fixing device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3022187C2 (en) * 1980-06-13 1983-08-11 Itw-Ateco Gmbh, 2000 Norderstedt Drilling screw
GB2100628B (en) * 1981-06-25 1985-04-11 Shinjo Seisakusho Yk A drill screw
DE102010041165A1 (en) * 2010-09-22 2012-03-22 Adolf Würth GmbH & Co. KG Drilling screw, has screw thread extending over cylindrical screw shank, drill tip manufactured using reforming procedure and provided with major cutting edges, and minor cutting edges running parallel to longitudinal axis of screw
DE102011085232A1 (en) * 2011-10-26 2013-05-02 Fabricius Fastener Gmbh Plastic screw i.e. nipple screw, for screwing into e.g. window frame, has screw tip formed in conical shape and comprising cutting edge, which is extended from outer surface of screw tip to screw shank

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310858A (en) * 1960-12-19 1962-11-30 Lennewerk Altena Gmbh Self-drilling sheet metal screws
GB957626A (en) * 1961-08-28 1964-05-06 Gen Am Transport Combination hole-drilling and thread-forming screw fasteners
BE620370A (en) * 1961-11-23
FR1331668A (en) * 1962-07-04 1963-07-05 Illinois Tool Works Screw fastener for wall and ceiling constructions
US3463045A (en) * 1966-05-10 1969-08-26 Illinois Tool Works Drilling screw
US3683436A (en) * 1970-01-22 1972-08-15 Textron Inc Method for making a drill screw with an extruded point
US3789725A (en) * 1971-10-06 1974-02-05 B Lindstrom Self-drilling and self-tapping fastener and method of manufacture thereof
US3782056A (en) * 1972-04-27 1974-01-01 Gen Electric Joint structure
US3937120A (en) * 1975-01-28 1976-02-10 Microdot Inc. Drill screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560304A1 (en) * 1984-02-24 1985-08-30 Yamahiro Co Ltd Self-tapping screw and die for forming its thread
GB2305703A (en) * 1995-09-27 1997-04-16 John Michael Pitts Screwthreaded fixing device

Also Published As

Publication number Publication date
IT7828424A0 (en) 1978-10-04
DE2843470A1 (en) 1979-04-12
JPS5460641A (en) 1979-05-16
IT1099243B (en) 1985-09-18
BR7806639A (en) 1979-05-02
FR2405389B1 (en) 1982-12-03
CH616211A5 (en) 1980-03-14
FR2405389A1 (en) 1979-05-04
SE7810509L (en) 1979-04-07

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)