作　　者： ; ; ; ;

机构地区： 燕山大学机械工程学院

出　　处： 《塑性工程学报》 2012年第6期59-62,共4页

摘　　要： 在分析大型直缝焊管四点弯曲JCO成形力学原理的基础上,对缩径矫圆的理论和实验进行研究,提出了四点弯曲JCOC成形新工艺。该工艺具有成形道次少、生产效率高、无需预弯边、残余应力小、柔性程度高、成形质量好和防止缺陷扩大等成形特点和优势。按照相似性原理,采用JCOC成形新工艺,以X80钢级Φ1219mm×22mm钢管为原型,同比例缩小模具和管件尺寸,制成缩径矫圆后Φ260.4mm×4.7mm管坯。该批管坯的椭圆度最大值≤0.5%,满足生产技术要求。JCOC成形新工艺具有良好的市场推广和工程应用价值。 Based on the analysis of the mechanical principles of the ＂four-point bending JCO （J-Forming C-Forming O-Forming）＂ process for LSAW （longitudinal submerged ard welding） pipe as well as theoretical and experimental researches on ＂compression to make round＂, this paper presented a new technology called the ＂four-point bending JCOC （J-Forming C-Forming O-Forming and Compression to make round） process＂. The advantages of the new technology included fewer steps of formation, higher productivity, the dispensing with crimping process, less residual stress, higher flexibility, better forming quality and preventing the expansion of flaws. Scaling down the mold and pipe dimensions in accordance with the principle of similarity, this experiment used the new technology to make Ф260.4mm× 4.7mm pipe samples from Ф1219mm× 22mm of X80 steel pipe. The samples made by the new process met production requirements with the ovality up to 0.5 %. This indicated that the new technology had good marketing and engineering applications.

关 键 词： 成形 四点弯曲 缩径矫圆 新工艺

领　　域： [金属学及工艺]