弧焊设备.第7部分:焊炬

[中文适用范围]： “IEC 60974 的这一部分规定了用于弧焊和相关工艺的焊枪的安全和结构要求。IEC 60974 的这一部分适用于手动@机械引导@风冷@液冷@电动@卷轴式和排烟焊枪. 在IEC 60974的本部分中，火炬由火炬本体@电缆软管组件和其他部件组成。IEC 60974的这一部分也适用于连接在电源和辅助设备之间的电缆软管组件。这部分IEC 60974 的标准不适用于手工金属电弧焊或气弧切割/气刨的焊钳。注 1 典型的联合工艺是电弧切割和电弧喷涂。注 2 其他组件列于表 A.1 中。注 3 IEC 60974@ 的这一部分中，术语“火炬”和“枪”可以互换。为方便起见，下文中使用了“火炬”。 [外文原描述]： IEC 60974-7:2013 specifies safety and construction requirements for torches for arc welding and allied processes. This part of IEC 60974 is applicable to manual, mechanically guided, air-cooled, liquid-cooled, motorized, spool-on and fume extraction torches. In this part of IEC 60974, a torch consists of the torch body, the cable-hose assembly and other components. This part of IEC 60974 is also applicable to a cable-hose assembly connected between a power source and ancillary equipment. This part of IEC 60974 is not applicable to electrode holders for manual metal arc welding or air-arc cutting/gouging. This third edition cancels and replaces the second edition published in 2007 and constitutes a technical revision. The significant changes with respect to the previous edition are listed below: - new requirement for degree of protection of torch coupling device (see Table 1); - scope is extended to cable-hose assembly connected between a power source and ancillary equipment (see Clause 1); - torch parts, as recommended by the manufacturer, are included in the safe plasma cutting system design (see 7.4.2); - new flammability requirement for handle material (see 11.3). This publication is to be read in conjunction with IEC 60974-1:2012 .