JPS57177922A - Bolt - Google Patents

Bolt

Info

Publication number
JPS57177922A
JPS57177922A JP6137681A JP6137681A JPS57177922A JP S57177922 A JPS57177922 A JP S57177922A JP 6137681 A JP6137681 A JP 6137681A JP 6137681 A JP6137681 A JP 6137681A JP S57177922 A JPS57177922 A JP S57177922A
Authority
JP
Japan
Prior art keywords
bolt
moved
heat treatment
irradiated
oscillator
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
JP6137681A
Other languages
Japanese (ja)
Inventor
Masaaki Kikuchi
Atsuro Itagaki
Hidekazu Aoki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6137681A priority Critical patent/JPS57177922A/en
Publication of JPS57177922A publication Critical patent/JPS57177922A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To obtain a bolt of high strength while producing a very small strain by heat treatment by irradiating the surface of the screw part with beams of light from a heat source with high energy density to carry out surface hardening. CONSTITUTION:A bolt 1 is attached to a miving device 11, and it is rotated and moved in the axial direction so that the screw bottom of the bolt 1 is irradiated with laser beams 9a emitted from a laser oscillator 8 and condensed through a lens 10. The irradiation is carried out while properly controlling the heat treatment conditions such as the density of laser beams from the oscillator 8, the emitting time and the spirally moving speed of the bolt 1 moved with the device 11 by means of a controller 12. The irradiated part of the bolt is rapidly heated and rapidly cooled to obtain a surface hardened layer by local hardening.
JP6137681A 1981-04-24 1981-04-24 Bolt Pending JPS57177922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6137681A JPS57177922A (en) 1981-04-24 1981-04-24 Bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6137681A JPS57177922A (en) 1981-04-24 1981-04-24 Bolt

Publications (1)

Publication Number Publication Date
JPS57177922A true JPS57177922A (en) 1982-11-01

Family

ID=13169391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6137681A Pending JPS57177922A (en) 1981-04-24 1981-04-24 Bolt

Country Status (1)

Country Link
JP (1) JPS57177922A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63157818A (en) * 1986-12-19 1988-06-30 Ishikawajima Harima Heavy Ind Co Ltd Heat treatment of thread part
DE10315957A1 (en) * 2003-04-08 2004-10-28 Ejot Gmbh & Co. Kg Screw with a partially hardened functional tip and process for its manufacture
DE102017117257A1 (en) 2017-07-31 2019-01-31 Fischerwerke Gmbh & Co. Kg concrete screw
WO2019131685A1 (en) * 2017-12-25 2019-07-04 株式会社松尾工業所 Fastening nut

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63157818A (en) * 1986-12-19 1988-06-30 Ishikawajima Harima Heavy Ind Co Ltd Heat treatment of thread part
DE10315957A1 (en) * 2003-04-08 2004-10-28 Ejot Gmbh & Co. Kg Screw with a partially hardened functional tip and process for its manufacture
US7247099B2 (en) 2003-04-08 2007-07-24 Ejot Gmbh & Co. Kg Screw with a partially hardened functional tip and process for the production thereof
DE102017117257A1 (en) 2017-07-31 2019-01-31 Fischerwerke Gmbh & Co. Kg concrete screw
EP3438475A1 (en) 2017-07-31 2019-02-06 fischerwerke GmbH & Co. KG Concrete screw
WO2019131685A1 (en) * 2017-12-25 2019-07-04 株式会社松尾工業所 Fastening nut
JPWO2019131685A1 (en) * 2017-12-25 2021-02-04 株式会社松尾工業所 Fastening nut

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