直缝埋弧焊钢管生产线预弯工艺

Prebending Process of Longitudinal Submerged Arc Welding Production Line

介绍了直缝埋弧焊钢管生产线预弯工艺的目的,分析了辊式预弯和模压式预弯的特点,指出当前直缝埋弧焊钢管生产线中普遍采用模压式预弯工艺。模压式预弯采用渐开线式模具,分步对钢板的两边同时进行折弯。影响预弯质量的主要因素有模具形状、预弯宽度、预弯卷角、模具长度、模具前后端过渡尺寸等。

The purpose of prebending process of longitudinal submerged arc welding pipe production line is introduced;character of roller prebending and mould press type prebending is analyzed.It points out that the mould press type prebending process is greatly adopted among current longitudinal submerged arc welding production line.The mould press prebending adopts involutes types mould and simultaneously fold bending the two edges of plate by steps.The main factor of effecting prebending quality has mould shape,prebending width,prebending roll angle;mould length and transitional dimensions of mould front and back ends,etc..