Title:
METHOD FOR MANUFACTURING REBAR JOINT COUPLER, AND REBAR JOINT COUPLER MANUFACTURED BY SAME
Document Type and Number:
WIPO Patent Application WO/2021/182705
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a rebar joint coupler, and a rebar joint coupler manufactured by same, and, more specifically, to a method for manufacturing a rebar joint coupler, and a rebar joint coupler manufactured by same, which manufacture a rebar joint coupler via firing without machining processing and, thereby, increase economic efficiency by shortening the time spent on manufacturing and reducing the occurrence of failures during a manufacturing process, and improve safety as there is no concern about durability reduction due to machining and durability against fatigue fracture and fatigue stress is improved. To this end, the present invention comprises: a tube cutting step for cutting, according to a design standard, a cylindrical tube with both ends open; a partition plate drawing-in step for drawing into the tube a partition plate for dividing the internal space of the tube; a first tube fixing step for fixing an end of the tube to a first fixing mold; a first part drawing-in step for sequentially drawing into any one space of a pair of internal spaces separated by the partition plate an elastic spring, a piece guide, and a piece; a first firing step for pressing, via a pressing mold, one side into which the elastic spring, the piece guide, and the piece are drawn; a second tube fixing step for fixing the one side of the tube, for which firing is completed, to a second fixing mold; a second part drawing-in step for sequentially drawing into the other space of the pair of internal spaces separated by the partition plate an elastic spring, a piece guide, and a piece; and a second firing step for pressing, via the pressing mold, one side into which the parts are drawn via the second part drawing-in step.
Inventors:
HONG JONG HOA (KR)
KIM KYOUNG SIK (KR)
KIM KYOUNG SIK (KR)
Application Number:
PCT/KR2020/014653
Publication Date:
September 16, 2021
Filing Date:
October 26, 2020
Export Citation:
Assignee:
HONG JONG HOA (KR)
International Classes:
B23P15/00; B21J5/02; B23P13/02; B23P19/12; E04C5/16
Foreign References:
| KR101796538B1 | 2017-11-10 | |||
| KR101838916B1 | 2018-03-15 | |||
| KR20200016147A | 2020-02-14 | |||
| US20150089808A1 | 2015-04-02 | |||
| KR102151795B1 | 2020-09-03 |
Attorney, Agent or Firm:
LEE, Byong Jin (KR)
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