roll forming machine

Abstract

In the present invention, the replacement operation of the horizontal rolls in the horizontal roll stand is performed simply and quickly, including the readjustment of the reduction amount. In order to realize this, a horizontal roll stand (10) incorporating a pair of upper and lower horizontal rolls (11) can be retracted to the side across the molding line. A fixed stand (40) is erected on the reverse side of the forming production line, and an overhang (42) of the fixed stand (40) that protrudes above the forming line is equipped with a pair of horizontal rollers (11). A depressing device (43) that applies a depressing force. The horizontal roll stand (10) has a horizontal roll shell (12) with an open upper part, the horizontal roll stand (10) receives a pressing force from the pressing device (43) via its open upper part, and presses the pressing down The device (43) remains on the molding line and is withdrawn from the molding line. The overhang (42) of the fixed stand (40) is matched with the horizontal roll shell (12) of the horizontal roll stand (10) in the forming production line and supports the horizontal roll shell (12).

Description

technical field [0001] The present invention relates to a roll former used for the production of a welded pipe, and more specifically, to a roll former which is easy to change the roll and has excellent economical efficiency. Background technique [0002] In a production line for welded pipes such as electric-resistance welded steel pipes, a strip-shaped metal sheet is formed into a tubular shape while the sheet metal passes through a plurality of roll formers arranged along the forming line, and the butt edges are welded to form a welded pipe . In such a pipe production line, the forming rolls assembled on the roll stand in the roll forming machine are replaced according to the pipe size. Here, the replacement work of the forming rolls requires rapidity of the replacement work, and Patent Document 1 proposes a roll former that satisfies this demand. [0003] The roll forming machine proposed in Patent Document 1 has a structure in which a horizontal roll stand in which a ...

AI Technical Summary

Problems solved by technology

However, since the upper and lower horizontal rollers are in a cantilevered state through the operation side portion of the base frame when the base frame is separated, it is necessary to increase the rigidity of the base frame, which inevitably leads to an increase in size and cost. are limited to rollers with relatively small diameters such restrictions

In addition, the complication of the machine base structure due to the division of the machine base frame cannot be avoided

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