GB997525A - Drilling tool and method of making the same - Google Patents

Drilling tool and method of making the same

Info

Publication number
GB997525A
GB997525A GB1743564A GB1743564A GB997525A GB 997525 A GB997525 A GB 997525A GB 1743564 A GB1743564 A GB 1743564A GB 1743564 A GB1743564 A GB 1743564A GB 997525 A GB997525 A GB 997525A
Authority
GB
United Kingdom
Prior art keywords
heated
rod
rockwell
drill
heat
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
Application number
GB1743564A
Inventor
Floyd Rienold Anderson
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.)
Gardner Denver Inc
Original Assignee
Gardner Denver Inc
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 Gardner Denver Inc filed Critical Gardner Denver Inc
Priority to GB1743564A priority Critical patent/GB997525A/en
Publication of GB997525A publication Critical patent/GB997525A/en
Expired legal-status Critical Current

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
    • E21B10/58—Chisel-type inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Heat Treatment Of Articles (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)

Abstract

<PICT:0997525/C6-C7/1> <PICT:0997525/C6-C7/2> A drill, e.g. a percussive rock drill, comprises a hardened rod thermally joined to a cutting element, the application of heat to effect thermal joining being so controlled as to thermally position an annealed and so weakened zone at that portion of the rod that has maximum cross-sectional area. The drill may be solid or hollow with passages 22, 26 for air or water. A steel rod 12 is provided with an enlarged end 14 by forging and is provided with one or more slots to receive tungsten carbide tips 30. After the rod 12 has been hardened by heat treatment, the bore 22 is closed by a plug 24 and the tip 30 and plates 40 of silver solder are inserted in the slot. The steel rod 12, which after hardening has a hardness of 60 Rockwell C, if heated to 1300 DEG F. and air cooled is annealed to a hardness of 20 Rockwell C, and if heated to 1500 DEG F. and air cooled is rehardened to 40 Rockwell C. The application of heat to the end 14 by a flame torch or by induction during brazing is so controlled that the end is heated to the rehardening temperature for a sufficient distance that the zone 44a which is heated only to the annealing temperature is located at the upper part of the enlarged end 14 which part has the greatest cross-sectional area. The melting point of the solder is 1350 DEG F.
GB1743564A 1964-04-27 1964-04-27 Drilling tool and method of making the same Expired GB997525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1743564A GB997525A (en) 1964-04-27 1964-04-27 Drilling tool and method of making the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1743564A GB997525A (en) 1964-04-27 1964-04-27 Drilling tool and method of making the same

Publications (1)

Publication Number Publication Date
GB997525A true GB997525A (en) 1965-07-07

Family

ID=10095148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1743564A Expired GB997525A (en) 1964-04-27 1964-04-27 Drilling tool and method of making the same

Country Status (1)

Country Link
GB (1) GB997525A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4995801A (en) * 1973-01-18 1974-09-11
GB2153727A (en) * 1984-01-31 1985-08-29 Nl Industries Inc A method of mounting a cutter in a drill bit body
WO2006015666A1 (en) * 2004-08-05 2006-02-16 Arvinmeritor Emissions Technologies Gmbh Exhaust system and method for joining components of an exhaust system
US10352484B2 (en) 2004-08-05 2019-07-16 Faurecia Emissions Control Technologies Germany Gmbh Exhaust system
CN110461518A (en) * 2017-09-20 2019-11-15 株式会社芝技研 Jig drill head

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4995801A (en) * 1973-01-18 1974-09-11
JPS5313562B2 (en) * 1973-01-18 1978-05-11
GB2153727A (en) * 1984-01-31 1985-08-29 Nl Industries Inc A method of mounting a cutter in a drill bit body
WO2006015666A1 (en) * 2004-08-05 2006-02-16 Arvinmeritor Emissions Technologies Gmbh Exhaust system and method for joining components of an exhaust system
US10352484B2 (en) 2004-08-05 2019-07-16 Faurecia Emissions Control Technologies Germany Gmbh Exhaust system
CN110461518A (en) * 2017-09-20 2019-11-15 株式会社芝技研 Jig drill head
US11325194B2 (en) * 2017-09-20 2022-05-10 Shiba R&D Co., Ltd Thin drill

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