JPS5519478A - Production of bit - Google Patents

Production of bit

Info

Publication number
JPS5519478A
JPS5519478A JP9280078A JP9280078A JPS5519478A JP S5519478 A JPS5519478 A JP S5519478A JP 9280078 A JP9280078 A JP 9280078A JP 9280078 A JP9280078 A JP 9280078A JP S5519478 A JPS5519478 A JP S5519478A
Authority
JP
Japan
Prior art keywords
electron
bit
welded along
weld line
welding
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
JP9280078A
Other languages
Japanese (ja)
Inventor
Tsutomu Kameyama
Tadao Takizawa
Susumu Goto
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.)
KAMEYAMA BITSUTO KK
Jeol Ltd
Original Assignee
KAMEYAMA BITSUTO KK
Jeol Ltd
Nihon Denshi KK
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 KAMEYAMA BITSUTO KK, Jeol Ltd, Nihon Denshi KK filed Critical KAMEYAMA BITSUTO KK
Priority to JP9280078A priority Critical patent/JPS5519478A/en
Publication of JPS5519478A publication Critical patent/JPS5519478A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)

Abstract

PURPOSE:To improve weld strength and enable welding to be performed with ease by electron-beam-welding a blade tip portion to the body portion of the bit. CONSTITUTION:The separated body portion 1 and blade tip portion 2 are admitted into the working chamber of an electron beam welding device, after which both are contacted and are electron-beam-welded along the weld line 3. Depending upon cases, the portion 5 of the blade formed of bearing steel and the support part 6 formed of tough and hard steel are electron-beam-welded along the weld line 7, thence the support part 6 and body 1 are electron-beam-welded along the weld line 8, whereby the bit is obtained.
JP9280078A 1978-07-29 1978-07-29 Production of bit Pending JPS5519478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9280078A JPS5519478A (en) 1978-07-29 1978-07-29 Production of bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9280078A JPS5519478A (en) 1978-07-29 1978-07-29 Production of bit

Publications (1)

Publication Number Publication Date
JPS5519478A true JPS5519478A (en) 1980-02-12

Family

ID=14064481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9280078A Pending JPS5519478A (en) 1978-07-29 1978-07-29 Production of bit

Country Status (1)

Country Link
JP (1) JPS5519478A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918533A (en) * 1982-07-23 1984-01-30 株式会社東芝 Vacuum breaker
JPS5932310U (en) * 1982-08-23 1984-02-28 住友電気工業株式会社 Composite small diameter drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918533A (en) * 1982-07-23 1984-01-30 株式会社東芝 Vacuum breaker
JPS5932310U (en) * 1982-08-23 1984-02-28 住友電気工業株式会社 Composite small diameter drill

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