JPS569111A - Core drill for hammer and for producing vibration - Google Patents

Core drill for hammer and for producing vibration

Info

Publication number
JPS569111A
JPS569111A JP8115279A JP8115279A JPS569111A JP S569111 A JPS569111 A JP S569111A JP 8115279 A JP8115279 A JP 8115279A JP 8115279 A JP8115279 A JP 8115279A JP S569111 A JPS569111 A JP S569111A
Authority
JP
Japan
Prior art keywords
cutters
core drill
bit
impacts
drill bit
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.)
Pending
Application number
JP8115279A
Other languages
Japanese (ja)
Inventor
Masaaki Miyanaga
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP8115279A priority Critical patent/JPS569111A/en
Publication of JPS569111A publication Critical patent/JPS569111A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/08—Brazed connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

PURPOSE:To prevent uneven wear of bit metal and to improve efficiency of drilling operation, by fixing cutters to the top of a cylindrical core drill bit with uneven intervals, so that impacts of the cutters may not be applied to the same point on an article to be drilled. CONSTITUTION:Twelve drilling cutters 2 are fixed to the top of cylindrical core drill bit 1 having, for instance, a caliber of 100mm.. These cutters 2 are disposed such that their intervals are uneven as shown by D1, D2, D3-D12 in the drawing. Here, the number of cutters attached to the bit, speed of the core drill bit and number of impacts are derived from Formulas I and II shown in the drawing. By thus imparting impacts and rotation to an article to be drilled by cutters 2, it is enabled to prevent uneven wear of the bit metal by reason of irregular disposition of cutters, to prolong the service life and to improve efficiency of drilling operation.
JP8115279A 1979-06-26 1979-06-26 Core drill for hammer and for producing vibration Pending JPS569111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8115279A JPS569111A (en) 1979-06-26 1979-06-26 Core drill for hammer and for producing vibration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8115279A JPS569111A (en) 1979-06-26 1979-06-26 Core drill for hammer and for producing vibration

Publications (1)

Publication Number Publication Date
JPS569111A true JPS569111A (en) 1981-01-30

Family

ID=13738455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8115279A Pending JPS569111A (en) 1979-06-26 1979-06-26 Core drill for hammer and for producing vibration

Country Status (1)

Country Link
JP (1) JPS569111A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146112U (en) * 1984-08-30 1986-03-27 株式会社 ミヤナガ Core drill bit for rotary hammer
US5417526A (en) * 1992-12-16 1995-05-23 Hilti Aktiengesellschaft Hollow crown drill with end face cutting members
WO2013053541A1 (en) * 2011-10-13 2013-04-18 Robert Bosch Gmbh Core drill bit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146112U (en) * 1984-08-30 1986-03-27 株式会社 ミヤナガ Core drill bit for rotary hammer
JPS6322008Y2 (en) * 1984-08-30 1988-06-17
US5417526A (en) * 1992-12-16 1995-05-23 Hilti Aktiengesellschaft Hollow crown drill with end face cutting members
WO2013053541A1 (en) * 2011-10-13 2013-04-18 Robert Bosch Gmbh Core drill bit

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