JPS5440958A - Screw provided with relaxation prevention - Google Patents

Screw provided with relaxation prevention

Info

Publication number
JPS5440958A
JPS5440958A JP10669477A JP10669477A JPS5440958A JP S5440958 A JPS5440958 A JP S5440958A JP 10669477 A JP10669477 A JP 10669477A JP 10669477 A JP10669477 A JP 10669477A JP S5440958 A JPS5440958 A JP S5440958A
Authority
JP
Japan
Prior art keywords
welding
prevented
relaxation
bead
round hole
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
JP10669477A
Other languages
Japanese (ja)
Inventor
Kunio Hasegawa
Shigehiro Shimoyashiki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10669477A priority Critical patent/JPS5440958A/en
Publication of JPS5440958A publication Critical patent/JPS5440958A/en
Pending legal-status Critical Current

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  • Connection Of Plates (AREA)

Abstract

PURPOSE:To prevent crack at the relavation prevention welding part by forming a hole on the welding junction bead of the screw in which relaxation is prevented by welding junction. CONSTITUTION:On the welding bead 5 of which relaxation is prevented by partially welding a fixed material 3 on the head part of a flat head bolt 1b for tightening the fixed material 3, the welding beginning part or welding end part is cut and removed in a round hole form by cutting tools such as drills or grinders, and a round hole 8 is formed which has a diameter larger than the width of a screw gap 6 and a depth at a degree that the welded metal is cut and removed. Thus, the stress concentration coefficient at the welded bead 5 end decreases, and the crack at the relaxation preventing welding part due to stress concentration is prevented, and also stress corrosion crack is prevented, for the round hole 8 has a diameter larger than the width of the screw gap 6.
JP10669477A 1977-09-07 1977-09-07 Screw provided with relaxation prevention Pending JPS5440958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10669477A JPS5440958A (en) 1977-09-07 1977-09-07 Screw provided with relaxation prevention

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10669477A JPS5440958A (en) 1977-09-07 1977-09-07 Screw provided with relaxation prevention

Publications (1)

Publication Number Publication Date
JPS5440958A true JPS5440958A (en) 1979-03-31

Family

ID=14440131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10669477A Pending JPS5440958A (en) 1977-09-07 1977-09-07 Screw provided with relaxation prevention

Country Status (1)

Country Link
JP (1) JPS5440958A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230306A (en) * 2005-02-25 2006-09-07 Kobashi Kogyo Co Ltd Apparatus for fastening tillage tine
JP2015117713A (en) * 2013-12-16 2015-06-25 カヤバ工業株式会社 Shock absorber and method of manufacturing shock absorber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230306A (en) * 2005-02-25 2006-09-07 Kobashi Kogyo Co Ltd Apparatus for fastening tillage tine
JP2015117713A (en) * 2013-12-16 2015-06-25 カヤバ工業株式会社 Shock absorber and method of manufacturing shock absorber

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees