GB1484567A - Fasteners - Google Patents
FastenersInfo
- Publication number
- GB1484567A GB1484567A GB3915673A GB3915673A GB1484567A GB 1484567 A GB1484567 A GB 1484567A GB 3915673 A GB3915673 A GB 3915673A GB 3915673 A GB3915673 A GB 3915673A GB 1484567 A GB1484567 A GB 1484567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flutes
- fasteners
- intersecting
- same operation
- drill point
- 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.)
- Expired
Links
- 238000005553 drilling Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/56—Making machine elements screw-threaded elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/48—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools threading tools
- B23P15/52—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools threading tools taps
-
- 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
- F16B15/00—Nails; Staples
-
- 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)
- Forging (AREA)
- Drilling Tools (AREA)
Abstract
1484567 Self - drilling fasteners GKN SCREWS & FASTENERS Ltd 8 Nov 1974 [18 Aug 1973 20 Dec 1973] 39156/73 and 59142/73 Heading F2H [Also in Division B3] A drill point is provided on a fastener (e.g. a screw) blank by forming two diametrically opposed straight (not helical flutes 12 and two planar faces 17 intersecting each other at 18 and intersecting the sides of the flutes to form cutting edges at 19 and lip clearance angles behind each cutting edge. The drill point 18 may be made where the flutes most nearly approach each other or slightly above or below that region. Further planar surfaces 20 may be provided parallel to the axis, or slightly inclined to give a greater width at the free end and a turning operation may be carried out to reduce the diameter as indicated at 23 and this also may have a slight taper. The flutes 12 are formed hot or cold between dies and the surfaces 20 may be formed in the same operation. Alternatively the surfaces 20 may be machined, possibly in the same operation as the faces 17.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3915673A GB1484567A (en) | 1973-08-18 | 1973-08-18 | Fasteners |
AU78185/75A AU494783B2 (en) | 1973-08-18 | 1975-02-13 | Improvements relating to screws |
NL7501721A NL7501721A (en) | 1973-08-18 | 1975-02-13 | PROCESS FOR MANUFACTURE OF A SELF-TAPPING SCREW AND SCREW MADE UNDER APPLICATION OF THE PROCEDURE. |
US05/623,612 US4016795A (en) | 1973-08-18 | 1975-10-20 | Self-drilling screws |
HK22778A HK22778A (en) | 1973-08-18 | 1978-05-04 | Improvements relating to fasteners |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3915673A GB1484567A (en) | 1973-08-18 | 1973-08-18 | Fasteners |
GB5814273A GB1453306A (en) | 1972-12-29 | 1973-12-14 | Method for assembling by adhesion with synthetic resins |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1484567A true GB1484567A (en) | 1977-09-01 |
Family
ID=26264021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3915673A Expired GB1484567A (en) | 1973-08-18 | 1973-08-18 | Fasteners |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1484567A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2576068A1 (en) * | 1985-01-17 | 1986-07-18 | Usm Corp | DRILLING AND TAPPING ASSEMBLY |
US4781506A (en) * | 1984-10-05 | 1988-11-01 | W. A. Deutsher Pty. Ltd. | Self-drilling screw |
EP0475712A2 (en) * | 1990-09-10 | 1992-03-18 | RESEARCH ENGINEERING & MANUFACTURING INC. | Thread-forming screw fastener |
US6142719A (en) * | 1998-03-30 | 2000-11-07 | Hilti Aktiengesellschaft | Self-drilling screw |
-
1973
- 1973-08-18 GB GB3915673A patent/GB1484567A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4781506A (en) * | 1984-10-05 | 1988-11-01 | W. A. Deutsher Pty. Ltd. | Self-drilling screw |
FR2576068A1 (en) * | 1985-01-17 | 1986-07-18 | Usm Corp | DRILLING AND TAPPING ASSEMBLY |
EP0475712A2 (en) * | 1990-09-10 | 1992-03-18 | RESEARCH ENGINEERING & MANUFACTURING INC. | Thread-forming screw fastener |
EP0475712A3 (en) * | 1990-09-10 | 1992-12-09 | Research Engineering & Manufacturing Inc. | Thread forming screw fastener and blank |
US6142719A (en) * | 1998-03-30 | 2000-11-07 | Hilti Aktiengesellschaft | Self-drilling screw |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931108 |