锻压技术

核电站用超级管道管嘴的热挤压成形工艺研究

英文标题：Research on the hot extrusion forming technology of super-pipe nozzles used in nuclear power station

作者：孙立明彭先宽郭磊徐广信

分类号：TG376

出版年,卷(期):页码：2014,39(9):48-52

摘要：

在传统三通支管翻边制造工艺的基础上，研究了核电站用超级管道管嘴的热挤压成形工艺。对超级管道管嘴的成形预制孔开孔尺寸、顶头（凸模）相关结构尺寸进行不同挤压工艺方案设计，并进行大量的管嘴热挤压成形工艺试验，获得了管嘴成形最佳关键工艺参数。试验结果表明：管嘴的预制孔直径可以按照体积不变的原则进行计算；顶头与凹模之间的间隙是决定管嘴壁厚的关键因素，管嘴壁厚约为间隙的92%～96%。通过理论计算可以估算管嘴成形高度，计算偏差一般在±10%以内。

Based on the traditional flanging process of tee, the hot extrusion forming technology of the super-pipe nozzles used in nuclear power station was studied. The different extrusion process schemes were designed with respect to the diameter of the prefabricated hole and the punch structure of the super-pipe nozzles, and the best technological parameters were obtained through a lot of technological experiments. The experimental results show that the prefabricated hole diameter of the nozzles can be calculated according to the principle of constant volume; the thickness of nozzles is primarily determined by the gap between the punch and die, as the thickness of nozzles is about 92%~96% of the gap. The forming height of the nozzles can be estimated by theoretic calculation, with a deviation between plus or minus 10%.

基金项目：

孙立明（1982-），男，硕士，工程师

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