发明名称 |
METHOD OF WORKING CONNECTION END OF DEFORMED BAR FOR REINFORCING CONCRETE, DEFORMED BAR WORKED BY THE METHOD AND STRUCTURE DEFORMED BAR |
摘要 |
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.
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申请公布号 |
CA2268878(A1) |
申请公布日期 |
2000.10.13 |
申请号 |
CA19992268878 |
申请日期 |
1999.04.13 |
申请人 |
YOO, CHUNG KI;CHUNG, GYENG OK |
发明人 |
YOO, CHUNG KI;CHUNG, GYENG OK |
分类号 |
B21H3/02;B21B1/16;B21J5/08;B21K1/56;E04C5/03;E04C5/16;E04C5/18;(IPC1-7):E04C5/01 |
主分类号 |
B21H3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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