焊接设备的维修
Maintenance of welding equipment
1．先问后动
1. ask first and move later.
对于有故障的焊接设备，在不明真相的情况下，不要急于动手，应该先了解设备的性能，询问操作人员产生故障的前后经过及故障现象。对于生疏、复杂的焊接设备，还应先熟悉设备的电路原理和结构特点，遵守相应的规定。拆卸前要充分熟悉每个部件的功能、位置、连接方式以及与周围其他器件的关系。在没有焊接设备线路图和组装图的情况下，应该一边拆卸，一边画草图，一边进行标记，并对拆卸的实物作好标识，注意安全。
For faulty welding equipment, in the case of unknown facts, do not rush to start, should first understand the performance of the equipment, ask the operator before and after the fault and fault phenomenon. For unfamiliar and complicated welding equipment, we should be familiar with the circuit principle and structure characteristics of the equipment and abide by the corresponding regulations. Before disassembly, be familiar with the function, LOCAIION, connection mode of each component and the relationship with other devices around it. In the absence of welding equipment circuit diagram and assembly drawings, should be disassembled, while drawing sketches, while marking, and the disassembly of the physical marking, pay attention to safety.
2．先外后里
2. first out, then behind.
一般应先检查焊接设备外部有无明显受伤的痕迹、电焊机部件有否缺损，并了解其维修史、使用年限、观察使用场所环境和焊接工艺等，然后再对电焊机进行检查。拆前应排除周边的故障因素，如接线、接地、配电容量以及使用的焊接工艺是否正确，只有在确定是电焊机内部故障后才能拆卸，否则，盲目拆卸可能将焊接设备越修越坏，如焊条电弧焊、埋弧焊、钨极气体保护电弧焊、等离子弧焊及熔化极气体保护焊机等。
Generally, it is necessary to check whether there are obvious signs of injury on the outside of the welding equipment, whether there are defects in the parts of the welding machine, and to know its maintenance history, service life, observe the environment of the use place and welding technology, and then to inspect the welding machine. Peripheral faults such as wiring, grounding, distribution capacity and welding process should be removed before disassembly. Disassembly can only be carried out after the internal faults of the welder are determined. Otherwise, blind disassembly may worsen the repair of welding equipment, such as electrode arc welding, submerged arc welding, tungsten gas shielded arc welding, etc. Sub arc welding and gas shielded arc welding machine.
3．先机后电
3. opportunities and later electricity
检查焊接设备的机械部件和零件、润滑、气路、水路、油路系统是否存在问题，只有在确定这些系统无故障后，再进行电气方面的检查。在检查电路故障时，应利用检测仪器仪表寻找故障部位，确认无接触不良故障后，再有针对性地查看线路与机械的运作关系，以免误判，如点焊、缝焊、凸焊及对焊等设备。

Check the mechanical parts and parts of the welding equipment, lubrication, air, water, oil system is there any problem, only to determine that these systems are fault-free, then conduct electrical inspection. When checking circuit faults, we should use testing instruments to find the fault LOCAIION, confirm the non-contact faults, and then check the operation relationship between the line and machinery to avoid misjudgment, such as spot welding, seam welding, projection welding and butt welding equipment.

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