摘要
介绍了一种先外增厚再缩径的油管管端镦粗新工艺(减径法),通过建立管端镦粗塑性成形工艺有限元模型,模拟了13Cr油管管端加厚传统工艺(累积法)与新工艺的金属流动规律及对成形过程的影响,并将新工艺的模拟结果与实际生产结果进行对比。对比发现:与累积法相比,减径法的成形速度较快,所需顶锻力较小。模拟结果表明:数值模拟结果与实际生产结果基本吻合,模拟结果具有可靠性;利用减径法镦粗变形的13Cr油管管端内外表面光滑平整,无明显的凹坑、波纹、折叠等缺陷。
Described in the article is a new process （reducing process） for tubing end upsetting which consists two steps, i.e., first outer circumferential upsetting, then reducing. A FE model of pipe-end plastic forming process is established to simulate the metal flow laws of the conventional upset process （the cumulative process） and the foresaid new process for the 13Cr tubing end, and the influences thereby on the forming process. The result of simulation of the new upsetting process is compared with that of relevant actual production. And the comparison result demonstrates that the former is basically in coincidence with the latter, which means that the simulation result is reliable. The end of the 13Cr tube as upset and deformed via the said reducing process has smooth and neat outer and inner surfaces free of any obvious defects like pit, ripple and fold, etc.
出处
《钢管》
CAS
2015年第5期66-70,共5页
Steel Pipe
