为了对多弧旁路gmaw (DB - GMAW)焊接过程中的熔滴过渡特征信息深入研究提供条件，对该种焊接方法下熔滴过渡图像颈缩部分边缘提取算法进行了研究。

In order to study metal transfer characteristics during dual bypass GMAW (DB-GMAW) process, many kinds of edge extraction algorithms were used to process the necking images of DB-GMAW metal transfer.

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然后主要从双丝或多丝电弧焊工艺和双焊炬组合焊接工艺两个大的方面着重介绍了纵列式熔化极气体保护焊、等离子弧-熔化极气体保护焊和双电极熔化极气体保护焊等高速弧焊工艺。

Then, high-speed arc welding processes are introduced, such as tandem GMAW, PAW-GMAW and DE-GMAW, based on two categories:twin or more wires arc welding process and two-torch combined welding process.

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