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IE781274L - Exposing worn carbide tips in drill bits - Google Patents

Exposing worn carbide tips in drill bits

Info

Publication number
IE781274L
IE781274L IE781274A IE127478A IE781274L IE 781274 L IE781274 L IE 781274L IE 781274 A IE781274 A IE 781274A IE 127478 A IE127478 A IE 127478A IE 781274 L IE781274 L IE 781274L
Authority
IE
Ireland
Prior art keywords
exposing
drill bits
milling head
peg
button
Prior art date
Application number
IE781274A
Other versions
IE47422B1 (en
Original Assignee
Fagersta Ab
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 Fagersta Ab filed Critical Fagersta Ab
Publication of IE781274L publication Critical patent/IE781274L/en
Publication of IE47422B1 publication Critical patent/IE47422B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/10—Bits for countersinking
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00—Accessories for drilling tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Milling Processes (AREA)

Abstract

A device for exposing worn button pegs in drill bits comprising a milling head (1) with an axial recess (3) accommodating a centering pin (2) displaceable in the axial direction of the milling head. Said pin has an inner end (5) acted on by a compression spring means (4), and an outer end projecting from the milling head. The outer end (8) of the centering pin has a bowl-shaped recess (9) with a shape which is preferably hemispherical and corresponds to the shape of the button end of the carbide peg extending out of the drill bit. The button end of said peg is enclosed by the bowl-shaped recess when exposing the body portion of the peg. <IMAGE> [SE7707478L]
IE1274/78A 1977-06-28 1978-06-26 Device for exposing worn carbide tips in drill bits IE47422B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7707478A SE406283B (en) 1977-06-28 1977-06-28 DEVICE FOR EXPOSED DROUGHT CARRIED METAL PINS IN DRILL CROWN

Publications (2)

Publication Number Publication Date
IE781274L true IE781274L (en) 1978-12-28
IE47422B1 IE47422B1 (en) 1984-03-07

Family

ID=20331713

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1274/78A IE47422B1 (en) 1977-06-28 1978-06-26 Device for exposing worn carbide tips in drill bits

Country Status (11)

Country Link
JP (1) JPS5417306A (en)
AT (1) AT357500B (en)
AU (1) AU3731878A (en)
BR (1) BR7804089A (en)
CA (1) CA1077921A (en)
DE (1) DE2826957A1 (en)
FR (1) FR2395809A1 (en)
GB (1) GB2000461B (en)
IE (1) IE47422B1 (en)
SE (1) SE406283B (en)
ZA (1) ZA783634B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941041C2 (en) * 1979-10-10 1981-07-09 Daimler-Benz Ag, 7000 Stuttgart Spot weld milling cutter

Also Published As

Publication number Publication date
FR2395809B3 (en) 1981-03-06
BR7804089A (en) 1979-01-16
AT357500B (en) 1980-07-10
GB2000461A (en) 1979-01-10
SE406283B (en) 1979-02-05
FR2395809A1 (en) 1979-01-26
CA1077921A (en) 1980-05-20
SE7707478L (en) 1978-12-29
AU3731878A (en) 1980-01-03
ATA457678A (en) 1979-12-15
DE2826957A1 (en) 1979-01-18
ZA783634B (en) 1979-06-27
IE47422B1 (en) 1984-03-07
GB2000461B (en) 1982-01-06
JPS5417306A (en) 1979-02-08

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