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埋弧焊在农机旧件修复工作中,得到了广泛的应用,各地农机修造厂正在陆续推广使用埋弧焊新工艺。在推广使用埋弧焊过程中,遇到的较为普遍的问题,是电源问题。目前,国内农机系统中许多资料介绍的埋弧焊电源,多强调采用平的或缓降的外特性直流电源,不采用具有陡降外特性的直流电焊机。我们在外地参观学习埋弧焊时,一些兄弟单位也强调要求采用平硬外特性的直流电源。然而,大多数县农机修造厂都没有这种电源,还需另外购置或改制,无疑会
Submerged arc welding in the old agricultural machinery repair work, has been widely used around the farm machinery repair plant is being gradually promoted the use of submerged arc welding new technology. In the promotion of submerged arc welding process, the more common problem encountered is the power problem. At present, many information in the domestic agricultural machinery system submerged arc welding power supply, and more emphasis on the use of flat or slow down the DC characteristics of external power, do not use steep descending characteristics of DC welding machine. When we visited the study of submerged arc welding in the field, some brothers units also stressed the requirement of using flat-hard DC characteristics of the DC power supply. However, most county farm machinery repair factories do not have such a power supply, and need to purchase or reform separately.