方矩形管孔型的钝角设计-《焊管》

文章信息/Info

Author(s):: CAO Guo-fu; (Guangdong Foshan Wansheng Industry Co.,Ltd.,Foshan 528316,Guangdong,China)

Keywords:: pass of rectangular pipe; obtuse angle design method; right angle design method; deformation resistance

摘要:: 针对现有方矩形管直角设计法孔型的缺陷，提出方矩形管孔型的钝角设计方法。该方法的基本思路是：在不影响方矩形管变形的前提下，通过将孔型顶角由直角改为按一定规律变化的钝角，让呈卧菱形状的平辊孔型接纳呈立菱形状的管坯，接着让卧菱形状的管坯进入立菱形状的立辊孔型，随着变形的继续，逐渐缩小菱形孔型对角线之差直至为零，成为正方形。这样设计的方矩形管孔型优点突出，不仅孔型开口大、深度浅、线速度差小，而且孔型磨损小、变形阻力小、打滑程度轻、方矩形管表面质量好。这种避空孔型边缘的设计方法和设计思想对多种异型管孔型设计都有借鉴作用。

Abstract:: It pointed out pass defect of current rectangular pipe designed by right angle method,raised obtuse angle design method of rectangular pipe pass.This approach is base on the following idea:under not effect to the deformation of rectangular pipe,to change right angle to obtuse angle which is variant as some regular,make plain-barreled roll pass receive vertical roll shape pipe blank,and then let pipe blank entering into vertical roll pass.With continuous deformation, the difference between diagonal line of rhombus pass will be reduced to zero,finally changed into a square.This kind of rectangular pass is with significant characteristics,not only large hatch,shallow depth,small difference of velocity,but also less wear,small deformation resistance,light spin degree and with good appearance.This kind of pass design method avoiding the edge of space and design idea will provide reference to design heteromorphosis pipe pass.