GB1282327A - Improvements in methods of sharpening twist drills for drilling metals and alloys - Google Patents

Improvements in methods of sharpening twist drills for drilling metals and alloys

Info

Publication number
GB1282327A
GB1282327A GB50132/69A GB5013269A GB1282327A GB 1282327 A GB1282327 A GB 1282327A GB 50132/69 A GB50132/69 A GB 50132/69A GB 5013269 A GB5013269 A GB 5013269A GB 1282327 A GB1282327 A GB 1282327A
Authority
GB
United Kingdom
Prior art keywords
drill
planes
ground
intersect
lips
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
GB50132/69A
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of GB1282327A publication Critical patent/GB1282327A/en
Expired 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
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
    • B24B3/32—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills for thinning the point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Drilling Tools (AREA)

Abstract

1282327 Grinding drills; drills REGIE NATIONALE DES USINES RENAULT 13 Got 1969 [18 Oct 1968] 50132/69 Headings B3C and B3D A method of sharpening a twist drill having a point comprising at least two symmetrical lips 3, 3<SP>1</SP> each formed with a cutting edge is characterized in that the drill is ground to impart a pyramidal configuration thereto, the vertex of the pyramid being centred automatically to the twist drill axis. Each lip is ground with three planes 4, 5, 6 and 4<SP>1</SP>, 5<SP>1</SP>, 61 so as to form a point 1 on the drill. Planes 4, 4<SP>1</SP> provide a negative rake to the lips 3, 3<SP>1</SP>, planes 5, 5<SP>1</SP> provide relieffor the lips, and planes 6, 6<SP>1</SP> are ground in the region of the web; planes 5, 6 and 5<SP>1</SP>, 6<SP>1</SP> intersect the planes 4, 4<SP>1</SP> along common lines 7 on a diameter of the drill, and planes 6, 4<SP>1</SP> and 6<SP>1</SP>, 4 intersect to form chisel edges 8, 8<SP>1</SP> which intersect the line 7 at the point 1. In apparatus for carrying out the method, the drill 2, Fig. 3, is mounted in a carrier 13 adjustable about a pivot 15 on an E-shaped support 12 rockable about an axis B, B<SP>1</SP> on a bed 14. The axis B, B<SP>1</SP> passes through the operative surface 11 of a cup-shaped grindlng wheei which may be dressed by a diamond 17. A stop 16 is provided for angularly adjusting the drill to predetermined angular positions for grinding the plane surfaces on the drill. In an alternative embodiment, the planes are ground on the drill by three grinding wheels 18, 19, 20 adjustable to predetermined angular positions.
GB50132/69A 1968-10-18 1969-10-13 Improvements in methods of sharpening twist drills for drilling metals and alloys Expired GB1282327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR170457 1968-10-18

Publications (1)

Publication Number Publication Date
GB1282327A true GB1282327A (en) 1972-07-19

Family

ID=8655818

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50132/69A Expired GB1282327A (en) 1968-10-18 1969-10-13 Improvements in methods of sharpening twist drills for drilling metals and alloys

Country Status (10)

Country Link
US (1) US3626645A (en)
JP (1) JPS505433B1 (en)
BG (1) BG21002A3 (en)
DE (1) DE1952217C3 (en)
ES (1) ES372264A1 (en)
FR (1) FR1589568A (en)
GB (1) GB1282327A (en)
HU (1) HU165984B (en)
NL (1) NL6915658A (en)
YU (1) YU33151B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146925A (en) * 1983-09-23 1985-05-01 Microcut Machine Tools Limited Drill point grinding machine

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838540A (en) * 1972-06-05 1974-10-01 J Steinmetz Apparatus for sharpening drills and other cutting tools
IT1006980B (en) * 1973-02-10 1976-10-20 Kapp & Co DEVICE FOR THE SUPPORT OF A WHEEL DRESSER DEVICE SERVING IN PARTICULAR FOR THE GRINDING OF THE FRONT SPO GLIA SURFACES OF CREATORS
FR2234749A5 (en) * 1973-06-20 1975-01-17 Costil Marcel
DE3066700D1 (en) * 1980-08-29 1984-03-29 Christen Ag Wabern Drill point grinding machine
IL64173A (en) * 1981-10-30 1984-03-30 Etm Eng Tool Mfg Co Ltd Machine for grinding points of drills
DE3202362C2 (en) * 1982-01-26 1986-05-22 Fa. Gottlieb Gühring, 7470 Albstadt Device for sharpening a twist drill
US5146669A (en) * 1991-07-31 1992-09-15 Fabiano Joseph F Method of manufacturing an insert drill
KR950031335A (en) * 1994-05-13 1995-12-18 아키모토 유우미 drill
WO2000044530A1 (en) * 1999-01-29 2000-08-03 Intertool Machines Ltd. Universal sharpening apparatus employing pair of arcuate bearings
DE19955172A1 (en) * 1999-11-16 2001-05-23 Kennametal Inc Method of grinding a drill bit and drill bit
US6450864B1 (en) * 2000-10-13 2002-09-17 Raphael W. Smith End mill grinder with two independently adjustable grinding wheels
JP5273896B2 (en) * 2002-08-08 2013-08-28 サージビット アイピー ホールディングス プロプライエタリー リミテッド Drill bit and method for manufacturing drill bit
AU2002950673A0 (en) * 2002-08-08 2002-09-12 Liam Patrick Ellis Surgical drill bit
JP5217031B2 (en) * 2008-07-01 2013-06-19 ニシガキ工業株式会社 Drill chuck and drill grinding machine
DE102014204700B4 (en) 2014-03-13 2022-02-17 Kennametal Inc. Rotary tool, in particular drilling tool and method for producing a rotary tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146925A (en) * 1983-09-23 1985-05-01 Microcut Machine Tools Limited Drill point grinding machine

Also Published As

Publication number Publication date
JPS505433B1 (en) 1975-03-04
DE1952217B2 (en) 1979-09-20
DE1952217C3 (en) 1980-05-29
ES372264A1 (en) 1971-09-16
NL6915658A (en) 1970-04-21
FR1589568A (en) 1970-03-31
HU165984B (en) 1974-12-28
YU251569A (en) 1975-12-31
US3626645A (en) 1971-12-14
YU33151B (en) 1976-06-30
BG21002A3 (en) 1976-01-20
DE1952217A1 (en) 1971-03-25

Similar Documents

Publication Publication Date Title
GB1282327A (en) Improvements in methods of sharpening twist drills for drilling metals and alloys
GB1443726A (en) Devices adaptable to automatic lathes for cutting tubular workpieces
GB1426678A (en) Methods of grinding cutting tools operating by axial thrust and having at least one cutting edge coplanar with the axis and jig for carrying out siad method
ES2114714T3 (en) SHARPENING MACHINE TOOLS.
US4043080A (en) Die lapping apparatus
GB1013750A (en) Device for grinding compound-convex surfaces
GB1358419A (en) Cutting tool and a machine including the same
ES8104033A1 (en) Machines for sharpening machining tools.
US4263754A (en) Shaping an arcuate surface on a wheel blank
GB986427A (en) High-performance grinding process, more particularly for the machining of metals of all degrees of hardness
US2897810A (en) Wheel dressing tool
US2199053A (en) Means for dressing grinding wheels
JPS57132955A (en) Cabochon copying abrasive device
JPS5830111B2 (en) forming dresser
JPS5542719A (en) Grinding machine provided with grind stone correcting device
SU123049A1 (en) The method of sharpening multiblade cutting tools with a screw or inclined tooth
GB690047A (en) Method for treating surfaces by means of diamonds and tools for the performance of said method
CS175585A2 (en) Zpusob tvaroveho brouseni s velkou rychlosti rotacne symetrickych obrobku a bruska k provadeni zpusobu
SU427852A1 (en) GRINDING GRINDER
GB731095A (en) Improvements in or relating to a tool for form dressing grinding wheels and method of making the same
CN106737190A (en) A kind of sliding sharpener
Skinner New Angle in Wheel-Dressing Tools
Jablonowski Will Creep-Feed Grinding Catch On?
JPH10180638A (en) Grinding wheel with helical groove
GB989244A (en) An improved method for the sharpening or re-sharpening of integral tooth profiled milling cutters

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years