EP 0947642 A2 19991006 - Method of working connection end of deformed bar for reinforcing concrete
Title (en)
Method of working connection end of deformed bar for reinforcing concrete
Title (de)
Verfahren zur Herstellung eines Anschlussendes an einem verformten Bewehrungsstab für Stahlbeton
Title (fr)
Procédé de réalisation d'une extrémité de jonction à une barre déformée pour béton armé
Publication
Application
Priority
- CA 2268878 A 19990413
- KR 19980011278 A 19980331
- TW 88109033 A 19990601
Abstract (en)
With an object of providing a method of working a connection end portion of deformed bar for reinforcing concrete considerably reducing working expense by enhancing easiness of working by promoting mechanical strength of a connection portion by being able to work the connection portion without destructing a steel skeleton structure of a connection portion between pieces of steel bar, deformed bar worked by the method and a connection structure of deformed bar, the invention provides a method of working a connection end portion of deformed bar for reinforcing concrete featured in comprising a swaging step in which in deformed bar for reinforcing concrete featured in swaging at least a connection end portion at normal temperature and forming a rolled thread portion at an outer peripheral face of the connection end portion of the deformed bar subjected to the swaging step in which at least one connection end portion is swaged at a normal temperature such that a maximum diameter of the connection end portion is equal to or slightly larger than a diameter of a cylindrical body of the deformed bar or slightly smaller than a diameter of the deformed bar depending on a degree of working; and a rolling step of forming a thread portion having a diameter substantially equal to a swaging diameter at an outer peripheral face of the connection end portion of the deformed bar which has been subjected to the swaging step. <IMAGE>
IPC 1-7
IPC 8 full level
E04C 5/18 (2006.01); B21B 1/16 (2006.01); B21H 3/02 (2006.01); B21J 5/08 (2006.01); B21K 1/56 (2006.01); E04C 5/03 (2006.01); E04C 5/16 (2006.01)
CPC (source: EP)
B21B 1/163 (2013.01); E04C 5/03 (2013.01); E04C 5/165 (2013.01)
Citation (applicant)
- KR 940008311 B1 19940912 - TECHNIPORT SA [FR]
- US 5158527 A 19921027 - BERNARD ALAIN [FR]
- GB 2286782 A 19950830 - CCL SYSTEMS LTD [GB]
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0947642 A2 19991006; EP 0947642 A3 20000112; EP 0947642 B1 20060531; AU 2257499 A 19991014; CA 2268878 A1 20001013; CA 2268878 C 20030429; CN 1239172 A 19991222; JP H11342448 A 19991214; KR 100248963 B1 20000315; KR 19990076461 A 19991015; TW 440482 B 20010616
DOCDB simple family (application)
EP 99302528 A 19990331; AU 2257499 A 19990331; CA 2268878 A 19990413; CN 99104528 A 19990331; JP 9176499 A 19990331; KR 19980014746 A 19980424; TW 88109033 A 19990601