异型管管面凹凸成因分析与调整  

Investigation of Causes for Development of Surface Concave and Convex Defects of Shaped Tube and Relevant Adjustment Measures

作　　者：曹国富 

机构地区：[1]广东省江门市俭美实业有限公司,广东江门529100

出　　处：《钢管》2016年第2期33-39,共7页Steel Pipe

摘　　要：将圆变异型管管面不平整分为凹面、凸面和凹凸面3种类型,分析其各自的产生原因:形成凸面的主要原因是管坯边长短于对应孔型边长,凹面的形成原因与凸面的则完全相反,形成凹凸面的主要原因是焊管在成型、焊接、定径过程中产生的各类压痕、孔型错位、"噘嘴"和"转角"等缺陷。针对管面各不平整类型,提出了一系列调整措施。When the round tube as the blank is processed into a shaped one, three different concave and convex surface defects are developed to form the unevenness of the tube, including concave defect, convex defect and concave- convex defect. Causes for these type of surface defects are investigated. As a result, it is revealed that the major cause for the convex defect is the blank tube＇ s side length is shorter than that of the correspondent groove, whereas the cause for the concave defect is completely on the contrary to that for the convex one, and that formation of the concave-convex defect is mainly due to various defects like different impresses, groove dislocation, ＂wry mouth＂ and ＂cornering＂ etc. which occur during the weld pipe manufacturing processes like forming, welding and sizing. According to the above mentioned tube surface unevenness defect types, a number of adjustment measurements are proposed.

关 键 词：异型管 圆变异 凹面 凸面 凹凸面 成因分析 调整措施 孔型调整 

分 类 号：TG335.75[金属学及工艺—金属压力加工]