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SE8900358L - PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING - Google Patents

PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING

Info

Publication number
SE8900358L
SE8900358L SE8900358A SE8900358A SE8900358L SE 8900358 L SE8900358 L SE 8900358L SE 8900358 A SE8900358 A SE 8900358A SE 8900358 A SE8900358 A SE 8900358A SE 8900358 L SE8900358 L SE 8900358L
Authority
SE
Sweden
Prior art keywords
drilling
beautiful
search
procedures
item
Prior art date
Application number
SE8900358A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8900358D0 (en
Inventor
A Rystedt
Original Assignee
Sandvik 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 Sandvik Ab filed Critical Sandvik Ab
Priority to SE8900358A priority Critical patent/SE8900358L/en
Publication of SE8900358D0 publication Critical patent/SE8900358D0/en
Priority to AU48607/90A priority patent/AU4860790A/en
Priority to EP90850025A priority patent/EP0381648A1/en
Priority to BR909000355A priority patent/BR9000355A/en
Priority to JP2020538A priority patent/JPH02298478A/en
Priority to CA002009179A priority patent/CA2009179A1/en
Priority to FI900532A priority patent/FI900532A7/en
Publication of SE8900358L publication Critical patent/SE8900358L/en

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/08—Modifying the physical properties of iron or steel by deformation by cold working of the surface by burnishing or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The present invention relates to a method to increase the strength of an element for percussive drilling, said element being made of hardened steel and transferring impact energy in its axial direction, said method involving deep rolling of the surface layer of the element, at least in certain sections. The invention also refers to an element worked in accordance with the method of the invention. Fatigue cracks in elements of the above mentioned kind are initiated in areas having an intensive dislocation motion. Such areas are originated near notches and parts having sharp-edged corners. The aim of the present invention is to remedy the influence that "poor surfaces" have upon the fatigue strength. The main characterizing feature of the invention is that said deep rolling of elements for percussive drilling creates a surface finish </= Ra 1.0.
SE8900358A 1989-02-02 1989-02-02 PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING SE8900358L (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE8900358A SE8900358L (en) 1989-02-02 1989-02-02 PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING
AU48607/90A AU4860790A (en) 1989-02-02 1990-01-18 Method to increase the strength of an element for percussive drilling
EP90850025A EP0381648A1 (en) 1989-02-02 1990-01-19 Method to increase the strength of an element for percussive drilling
BR909000355A BR9000355A (en) 1989-02-02 1990-01-29 PROCESS FOR INCREASING THE STRENGTH OF AN IMPACT DRILLING ELEMENT AND IMPACT DRILLING ELEMENT
JP2020538A JPH02298478A (en) 1989-02-02 1990-02-01 Parts for impulsive drill and its strengthening method
CA002009179A CA2009179A1 (en) 1989-02-02 1990-02-02 Method to increase the strength of an element for percussive drilling
FI900532A FI900532A7 (en) 1989-02-02 1990-02-02 Method for increasing the strength of an element used in impact drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8900358A SE8900358L (en) 1989-02-02 1989-02-02 PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING

Publications (2)

Publication Number Publication Date
SE8900358D0 SE8900358D0 (en) 1989-02-02
SE8900358L true SE8900358L (en) 1990-08-03

Family

ID=20374924

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8900358A SE8900358L (en) 1989-02-02 1989-02-02 PROCEDURES TO ACHIEVE HALF FASTENING SEARCH ON AN ITEM FOR BEAUTIFUL DRILLING

Country Status (7)

Country Link
EP (1) EP0381648A1 (en)
JP (1) JPH02298478A (en)
AU (1) AU4860790A (en)
BR (1) BR9000355A (en)
CA (1) CA2009179A1 (en)
FI (1) FI900532A7 (en)
SE (1) SE8900358L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401630B (en) * 1992-05-25 1996-10-25 Plansee Tizit Gmbh METHOD FOR PRODUCING MOLDED PARTS WITH ROLLED SURFACES OF HIGH FIT ACCURACY
NL1023342C2 (en) * 2003-05-05 2004-11-09 Skf Ab Method for treating the surface of a machine element.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2161155A6 (en) * 1970-11-23 1973-07-06 Stephanois Rech

Also Published As

Publication number Publication date
SE8900358D0 (en) 1989-02-02
FI900532A7 (en) 1990-08-03
EP0381648A1 (en) 1990-08-08
CA2009179A1 (en) 1990-08-02
AU4860790A (en) 1990-08-09
BR9000355A (en) 1990-12-04
FI900532A0 (en) 1990-02-02
JPH02298478A (en) 1990-12-10

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