A.T.Male
,
Y.W.Chen
,
P.J.Li
,
C.Pan
,
Y.M.Zhang
材料科学技术（英）
Plasma-jet forming is a newly proposed flexible sheet metal forming process. A non-transferred arc plasma torch is used as a controllable heat source to produce internal stress in sheet metals, causing plastic deformation without the necessity of hard tooling. This method has potential for rapid prototyping of sheet metal parts by reducing development costs and lead times. A robotic system has been used to perform simple linear bends in several different alloys. In order to develop a controllable process and to improve the forming accuracy, the effects of various process parameters on the obtained shape changes and ton the resulting structure and properties have been studied. The overall goal is to understand the roles of the forming parameters and their inter-relationship in optimizing the forming procedure-a high forming speed without damage to the material structure or properties.
关键词:
潘春旭
,
Y.M.Zhang
,
A.T.Male
金属学报
探索了一种新的焊接方法--双面电弧焊在焊接各种材料时的特点.该方法利用两个常规的电弧在工件两侧同时施焊.焊接电流从一个焊炬通过工件流入另一个焊炬.除了具有会聚电弧、提高焊接熔透能力外.该焊接工艺还能够促进焊接凝固时的"柱状晶向等轴晶的转变".改善焊缝组织.减少焊接气孔率.这些特点对于提高焊接接头的机械性能具有重要的意义.
关键词:
双面电弧焊.焊接组织.凝固行为.气孔
