JPS569111A - Core drill for hammer and for producing vibration - Google Patents
Core drill for hammer and for producing vibrationInfo
- 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
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.
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)
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 |
-
1979
- 1979-06-26 JP JP8115279A patent/JPS569111A/en active Pending
Cited By (4)
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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