新型弯管机关键机构设计及相关工艺的开发  

Design of the Key Mechanism of a New Type of Pipe Bender and Development of Related Processes

作　　者：白振华 林威[1] 胡万通 张佳胜 BAI Zhenhua;LIN Wei;HU Wantong;ZHANG Jiasheng(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Hebei Qinhuangdao 066004,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Hebei Qinhuangdao 066004,China)

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004

出　　处：《机械设计与制造》2025年第1期369-373,共5页Machinery Design & Manufacture

基　　金：中央引导地方科技发展资金项目(206Z1004G);唐山市科技计划(20140209C)。

摘　　要：针对新型弯管机组在生产弯管的过程中,由于管材弯曲变形的特殊性和复杂性,使得弯管的成形过程中容易产生管壁失稳起皱、减薄拉裂、横截面畸变等各种缺陷等重要问题,以外径60.3mm、壁厚3.05mm规格的不锈钢管材为对象,在机械设计理论的基础上,对其管状毛坯的定位机构进行了设计并通过有限元分析实现管状毛坯两端倾角,管状毛坯上下端长度以及管状毛坯的中心长度变形率的确定。使新型弯管机的弯管成形机构、管状毛坯和液压推杆的中轴线保持在同一水平高度上面,以保证管状毛坯在液压推杆的推动下能够准确地进入成形模具之中。可以代替原本的设备,提高弯管的成形质量,提高生产效率,具有进一步推广应用的价值。Aiming at the production process of the new pipe bending unit,due to the particularity and complexity of the bending deformation of the pipe,the pipe wall is prone to instability wrinkling,thinning and cracking,cross-sectional distortion,etc.during the forming process of the pipe.This article takes the stainless steel pipe with an outer diameter of 60.3mm and a wall thick⁃ness of 3.05mm as the object.Based on the mechanical design theory,the positioning mechanism of the tubular blank is designed and the two tubular blanks are realized through finite element analysis.Determination of the end inclination angle,the length of the upper and lower ends of the tubular blank and the deformation rate of the central length of the tubular blank.The central axis of the pipe bending forming mechanism,the tubular blank and the hydraulic push rod of the new pipe bender are maintained at the same level to ensure that the tubular blank can accurately enter the forming mold under the push of the hydraulic push rod.It can replace the original equipment,improve the forming quality of the elbow,and increase the production efficiency,which has the value of further popularization and application.

关 键 词：新型弯管机组 不锈钢 管材 有限元分析 管状毛坯 定位机构 

分 类 号：TH16[机械工程—机械制造及自动化] TG375[金属学及工艺—金属压力加工]