管端外镦粗模设计哈尔滨锅炉有限责任公司（黑龙江哈尔滨１５００４６）蔡多谋赵文利高占滨１引言管端加工工艺是锅炉产品中经常采用的工艺，该工艺一般包括管端的缩口和镦粗。在一般产品中采用如图１所示的镦粗形式，这种镦粗的特点是管子外径基本不变化，镦粗模型腔的尺... (Harbin Heilongjiang 150046) Cai Duomo Zhao Wenli Gao Zhanbin 1 Introduction Pipe-end processing is a commonly used technology in boiler products, and the process generally includes shrinkage and upsetting at the pipe end. In the general product as shown in Figure 1 upsetting form, this upsetting is characterized by the basic tube diameter does not change, the upsetting cavity ...