大口径钢管在线热扩径机  

An online hot-expending machine for large-diameter steel pipe

作　　者：孙念光 魏学荣 曹喜燕 阎善武 

机构地区：[1]陕西多伦科技发展有限公司,陕西西安710072 [2]扬州诚德钢管有限公司,江苏扬州225211

出　　处：《重型机械》2015年第3期9-11,共3页Heavy Machinery

摘　　要：由于大口径无缝钢管生产过程对管坯边加热边扩径,因此加热功率高、扩径效率低、材料组织晶粒粗大的缺点。陕西多伦科技发展有限公司研制的Φ1 300 mm大口径钢管在线热扩径机,具有生产效率高、节能、短流程等特点。同时该扩径机采用了四夹头对中约束装置。减小管坯端部变形量,约束管坯的周向变形,保证了管坯变形过程的圆柱度。Heating-while-expending steel pipe is required in the production process of large-diameter steel pipe, but there are some shortcoming , such as high heating power , poor expending efficiency , and coarse grain.Hot-expending machine for Φ1 300 mm large-diameter steel pipe was developed by shaanxi doron tech-nology development Co., Ltd., it is high production efficiency , energy conservation and short process this expen-der.Centering restraint device with four-jaw independent chuck was used in this expender , which decreased de-formation of end pipe and restrained circumferential deformation .The device does guarantee cylindricality .

关 键 词：大口径钢管 扩径机 短流程 

分 类 号：TG306[金属学及工艺—金属压力加工]