JPS5652110A - Rotary cutting tool with bottom blade - Google Patents

Rotary cutting tool with bottom blade

Info

Publication number
JPS5652110A
JPS5652110A JP12704679A JP12704679A JPS5652110A JP S5652110 A JPS5652110 A JP S5652110A JP 12704679 A JP12704679 A JP 12704679A JP 12704679 A JP12704679 A JP 12704679A JP S5652110 A JPS5652110 A JP S5652110A
Authority
JP
Japan
Prior art keywords
cutting
zone
drill
rotation center
cutting tool
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.)
Granted
Application number
JP12704679A
Other languages
Japanese (ja)
Other versions
JPS5822283B2 (en
Inventor
Hideo Negishi
Kaoru Goto
Sueji Takatani
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.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
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 Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP54127046A priority Critical patent/JPS5822283B2/en
Priority to US06/192,627 priority patent/US4373839A/en
Priority to DE3037097A priority patent/DE3037097C2/en
Publication of JPS5652110A publication Critical patent/JPS5652110A/en
Priority to US06/428,717 priority patent/US4565471A/en
Publication of JPS5822283B2 publication Critical patent/JPS5822283B2/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
    • B23B51/04—Drills for trepanning
    • 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
    • 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
    • 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
    • B23B51/063—Deep hole drills, e.g. ejector drills
    • B23B51/066—Gun drills

Landscapes

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

Abstract

PURPOSE:To eliminate various damages by a chisel edge, degradations of rigidity of a tip end by thinning, or difficulties in manufacturing so as to make the cutting tool be opplicable to a superhard alloy by removing a blade from the rotation center of a cutting part. CONSTITUTION:A noncutting zone (gap part) 30 is provided at the tip end of the cutting part and in the rotation center of a drill of a solid type. The width (d) of the zone 30 may be normally 0.2-2.5mm.. In the zone 30, a core is prevented from being produced. The inner edges 30a, 32b of the cutting blade are brought onto the cutting surface of a machining material 34 substantially at the same time. The vibration of the drill occurring during the drilling operation can be effectively restricted. Further, the provision of the noncutting zone 30 in the rotation center of the drill enables a smooth cutting with a reduced thrust load.
JP54127046A 1979-10-02 1979-10-02 drilling tool Expired JPS5822283B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP54127046A JPS5822283B2 (en) 1979-10-02 1979-10-02 drilling tool
US06/192,627 US4373839A (en) 1979-10-02 1980-09-30 Drill bit
DE3037097A DE3037097C2 (en) 1979-10-02 1980-10-01 Solid drilling tools, especially twist drills
US06/428,717 US4565471A (en) 1979-10-02 1982-09-30 Drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54127046A JPS5822283B2 (en) 1979-10-02 1979-10-02 drilling tool

Publications (2)

Publication Number Publication Date
JPS5652110A true JPS5652110A (en) 1981-05-11
JPS5822283B2 JPS5822283B2 (en) 1983-05-07

Family

ID=14950266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54127046A Expired JPS5822283B2 (en) 1979-10-02 1979-10-02 drilling tool

Country Status (1)

Country Link
JP (1) JPS5822283B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834706A (en) * 1981-08-24 1983-03-01 Nippon Yakin:Kk Super-hard drill
JPS59193614U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193612U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193613U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193616U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS6022213U (en) * 1983-07-25 1985-02-15 三菱マテリアル株式会社 Drill
JPS6022212U (en) * 1983-07-25 1985-02-15 三菱マテリアル株式会社 carbide drill
JPS6029017U (en) * 1983-07-27 1985-02-27 三菱マテリアル株式会社 carbide drill
JPH02124207A (en) * 1987-12-14 1990-05-11 Mitsubishi Metal Corp Twist drill
CN107921553A (en) * 2015-08-27 2018-04-17 三菱综合材料株式会社 drill bit

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234484B2 (en) * 1981-08-24 1987-07-27 Nippon Yakin Kk
JPS5834706A (en) * 1981-08-24 1983-03-01 Nippon Yakin:Kk Super-hard drill
JPS59193614U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193612U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193613U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPS59193616U (en) * 1983-05-31 1984-12-22 三菱マテリアル株式会社 carbide drill
JPH0321851Y2 (en) * 1983-05-31 1991-05-13
JPH0318091Y2 (en) * 1983-05-31 1991-04-17
JPH0318090Y2 (en) * 1983-05-31 1991-04-17
JPS6317604Y2 (en) * 1983-05-31 1988-05-18
JPS6144728Y2 (en) * 1983-07-25 1986-12-16
JPS6225292Y2 (en) * 1983-07-25 1987-06-29
JPS6022212U (en) * 1983-07-25 1985-02-15 三菱マテリアル株式会社 carbide drill
JPS6022213U (en) * 1983-07-25 1985-02-15 三菱マテリアル株式会社 Drill
JPS6029017U (en) * 1983-07-27 1985-02-27 三菱マテリアル株式会社 carbide drill
JPH02124207A (en) * 1987-12-14 1990-05-11 Mitsubishi Metal Corp Twist drill
CN107921553A (en) * 2015-08-27 2018-04-17 三菱综合材料株式会社 drill bit
US10471522B2 (en) 2015-08-27 2019-11-12 Mitsubishi Materials Corporation Drill

Also Published As

Publication number Publication date
JPS5822283B2 (en) 1983-05-07

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