焊机的用途很广泛。在造船企业、工矿企业和各种建筑企业电焊机都是不可缺少的工具。焊机是用于材料焊接的，在使用时是带电的，尤其是一些小的施工单位为节省成本购买便宜的电焊机，在施工现场恶劣的环境下使用很容易引起触电、着火、脱焊的现象发生，会危及人身安全和财产安全。因为焊接质量不好也会造成“豆腐渣”工程。所以在选购焊机时要注意以下几点要求：

Welding machines are widely used. In shipbuilding enterprises, industrial and mining enterprises and various construction enterprises, electric welding machines are indispensable tools. The welder is for welding material, when in use is charged, especially some small construction units to buy cheap electric welding machine in order to save costs, the use of prone to cause electric shock, fire, sealing off phenomenon at the construction site of the bad environment, will endanger the personal safety and property safety. Because the quality of welding is not good, it will cause "bean curd residue" project. Therefore, when purchasing welding machines, we should pay attention to the following requirements:

一、在选购焊机产品时，要到正规的生产企业或大商场去选购，并且要选购市场占有率较高的品牌名优产品。千万不要贪图便宜到小商店去购买，电焊机质量无法达到保证。

First, in the purchase of welding products, to regular production enterprises or shopping malls to buy, and to buy a higher market share of famous brand products. Do not covet cheap to small shops to buy, welding machine quality can not be guaranteed.

二、选购时，检查产品上的铭牌是否有生产厂家的名称、生产地址、规格型号、焊接电流调节范围、负载持续率及输入电压电流等一些内容，随后根据工作需要来确定自己要购买的焊机。

Two, the purchase, check the product nameplate whether the manufacturer's name, address, production specifications, welding current adjusting range and load duration factor and input current and voltage of some of the content, then according to the needs of the work to determine the machine you want to buy.

三、购买时可以要求经销商提供产品质量检验报告或合格证。因焊机产品是强制性认证产品，所以购买时一定要确认该产品是否通过“3C”认证。

Three, when buying, you can ask the dealer to provide product quality inspection report or certificate. Because welding machine products are compulsory certification products, so when purchasing must confirm whether the product through "3C" certification.

四、购买时一定要检查该产品是否有接地螺钉，接地螺钉连接处应无油漆，接地良好。机芯是否清洁缘、是否有损坏，以保证使用安全，必要时也可检测一下。

Four, the purchase must check whether the product has a grounding screw, grounding screw connection should be no paint, grounding is good. Is the movement clean, insulated and damaged to ensure safe use and can be detected when necessary.

五、购买前可以通电检查一下面板上的开关操作，转换以及安装情况，电源指示灯的亮灭，风扇是否正常，电源部分是否有异常的振动及蜂鸣声，是否有异味，外观上是否有变色等发热现象，以保证焊机的质量，充分发挥电焊机的性能。

Five, before the purchase can check the power switch operation under a board, conversion and installation, the power indicator lights off, the fan is normal, if power supply has abnormal vibration and the buzzing sound, whether there is a smell, if there is a color fever phenomenon appearance, in order to ensure the welding quality, full performance use of electric welding machine.

六、如要购买气体保护焊机，在购买前还要检查配件是否齐全，送丝机是否有油污，转动是否平稳，连接电缆是否匹配外表缘、是否有损坏，以保证电弧的稳定性。

Six, if you want to buy gas protectionwelder before buying also check whether the complete accessories, wire feeding machine whether there is oil, the rotation is stable, connecting cable, insulation, whether appearance whether there is damage to ensure the stability of arc.