本龙门焊机是为焊制几十米长的大型箱式结构件而研制的弧焊设备。

This gantry type welding machine is an arc welding equipment developed for welding large box type construction of tens meters long.

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介绍了一种自行研制的焊环自动成形机(简称制环机)的工作原理及结构，并着重分析、说明了其主要设计情况。

This article introduces the working principle, main structure of a kind of Auto-molding Ring-making Machine developed on our own as well as its design and production condition.

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