MY115943A - Surface decarburization of a drill bit - Google Patents

Surface decarburization of a drill bit

Info

Publication number
MY115943A
MY115943A MYPI94003041A MYPI19943041A MY115943A MY 115943 A MY115943 A MY 115943A MY PI94003041 A MYPI94003041 A MY PI94003041A MY PI19943041 A MYPI19943041 A MY PI19943041A MY 115943 A MY115943 A MY 115943A
Authority
MY
Malaysia
Prior art keywords
rake
intersection
flutes
cutting tip
flank
Prior art date
Application number
MYPI94003041A
Inventor
Fang Zhigang
W Britzke Robert
Eason Jimmy
Original Assignee
Rogers Tools
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
Priority claimed from US08/314,511 external-priority patent/US5628837A/en
Priority claimed from US08/314,510 external-priority patent/US5609447A/en
Application filed by Rogers Tools filed Critical Rogers Tools
Publication of MY115943A publication Critical patent/MY115943A/en

Links

Landscapes

  • Drilling Tools (AREA)

Abstract

A DRILL BUT HAVING A DRILL BODY (13) WITH A CUTTING TIP (14), AN AXIS OF SYMMETRY (16), AND A PLURALITY OF FLUTES (15) WHEREIN SAID FLUTES (15) HAVE A RAKE SURFACE (17) AT SAID CUTTING TIP (14). THE CUTTING TIP (14) INCLUDES A PLURALITY OF SIDE BLADES (22) BETWEEN SAID FLUTES (15) AND JOINED AT A WEB (23), A PLURALITY OF FLANK SURFACES (27) EXTENDING FROM AN OUTER DIAMETER (25) OF SAID CUTTING TIP (14) TO SAID AXIS OF SYMMETRY (16), AND A PLURALITY OF PRIMARY CUTTING EDGES (20) AT THE INTERSECTION OF SAID FLANK SURFACES (27) WITH SAID RAKE SURFACES (17). BOTH THE RAKE AND FLANK SURFACES (27) HAVE EXTENSIONS WHICH WOULD INTERSECT EACH OTHER AT AN INTERSECTION. THE PRIMARY CUTTING EDGES (20) INCLUDE AN ANGULAR SURFACE (41) FORMED ON THE FORWARD END OF SAID RAKE SURFACES (17) WHICH IS LOCATED SUCH THAT THE LENGTH OF SAID EXTENSION OF SAID RAKE SURFACE (17) MEASURED BETWEEN SAID ANGULAR SURFACE (41) AND SAID INTERSECTION IS A FIRST PREDETERMINED VALUE AND THE LENGTH OF SAID EXTENSION OF SAID FLANK SURFACE (27) MEASURED BETWEEN SAID ANGULAR SURFACE (41) AND SAID INTERSECTION IS A SECOND PREDETERMINED VALUE. THE PRIMARY CUTTING EDGES (20) ALSO HAVE A HARDENED LAYER FORMED FROM THE OUTER SURFACE (25) OF THE PRIMARY CUTTING EDGE (20). (FIGURE 3)
MYPI94003041A 1994-09-28 1994-11-15 Surface decarburization of a drill bit MY115943A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/314,511 US5628837A (en) 1993-11-15 1994-09-28 Surface decarburization of a drill bit having a refined primary cutting edge
US08/314,510 US5609447A (en) 1993-11-15 1994-09-28 Surface decarburization of a drill bit

Publications (1)

Publication Number Publication Date
MY115943A true MY115943A (en) 2003-10-31

Family

ID=51565644

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI94003041A MY115943A (en) 1994-09-28 1994-11-15 Surface decarburization of a drill bit

Country Status (2)

Country Link
MY (1) MY115943A (en)
TW (1) TW300922B (en)

Also Published As

Publication number Publication date
TW300922B (en) 1997-03-21

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