公开(公告)号：KR101255487B1

公开(公告)日：2013-04-16

申请号：KR1020120031269

申请日：2012-03-27

Applicant: 경일대학교산학협력단

Inventor： 최성종 ,  조현덕 ,  김석수

IPC: B21D9/03

CPC classification number: B21D9/03

Abstract: PURPOSE: A section symmetry type double roller mandrel for pipe-bending is provided to prevent damages caused by the compression and abrasion of a pipe and the generation of noise and heat since the slip phenomena of the upper and lower side of the inside of a pipe is not generated during a pipe-bending. CONSTITUTION: A section symmetry type double roller mandrel for pipe-bending comprises a frame(10), an upper roller(1) and a lower roller(2). The frame is installed on a link(20) equipped on the fore-end part of a rod. The frame is installed with the upper roller contacted to the upper side of a pipe to be rotatable around a shaft. The lower roller is formed on the lower part of the upper roller to be contacted with the lower side of the inside of the pipe, and rotatable around the shaft.

Abstract translation: 目的：提供一种用于管道弯曲的截面对称型双辊心轴，以防止管道的压缩和磨损造成的损坏以及噪声和热量的产生，因为管道内侧的上侧和下侧的滑动现象 在管道弯曲期间不产生。 构成：用于管弯的截面对称型双辊心轴包括框架（10），上辊（1）和下辊（2）。 框架安装在设在杆前端部分上的连杆（20）上。 框架安装有上辊与管的上侧接触以围绕轴旋转。 下辊形成在上辊的下部，与管的内侧的下侧接触，并且能够围绕轴旋转。