精密点焊机电源通过次级电缆把能量传送给焊点，使工件能够牢固的焊接起来，经常有客户来问电缆多长，多粗,电缆如何绝缘等等问题，下面苏州威尔达焊接为您解答次级电缆如何选配的问题。

The power supply of precision spot welding machines transfers energy to the welding points through secondary cables, enabling the workpiece to be firmly welded. Customers often ask questions about the length and thickness of the cable, how to insulate it, and so on. Below, Suzhou Verda Welding will answer your questions about how to choose secondary cables.

1、电缆的选择应该选择铜材，毕竟铜的电阻小，导电性能好，相对其他银基材料适中，发热量少。

1. The selection of cables should be made of copper material, as copper has low resistance, good conductivity, and is relatively affordable compared to other silver based materials, with less heat generation.

2、电缆结构选择铜板还是多股铜线，要看使用场合。一般来说电流越大，结构和动作固定，更适合直接选择铜板。而小电流的情况下，具有独立输出变压器和独立焊接机构的情况下，一般选择多股铜线。2万安培以上的精密逆变点焊机输出一般直接采用紫铜板，而2万安培以下输出的电流情况下，一般采用柔性的多股铜线，而且单股铜丝越细，柔性越好。

2. The choice of cable structure between copper plate or multi stranded copper wire depends on the usage situation. Generally speaking, the higher the current, the more stable the structure and action, making it more suitable to directly choose copper plates. In the case of low current, with independent output transformers and independent welding mechanisms, multi stranded copper wires are generally chosen. Precision inverter spot welding machines with an output of over 20000 amperes generally use copper plates directly, while for current output below 20000 amperes, flexible multi stranded copper wires are generally used, and the finer the single stranded copper wire, the better the flexibility.

3、铜线采用多长?理论上来说，是越短越好，因为越短电阻越小，发热更小。有些客户一味的要求我们的点焊机配置更长的电缆，其实完全没有必要。发热量更多的情况下，可以采用铜板水冷，或者水冷柔性的次级电缆。

3. How long is the copper wire used? In theory, the shorter the better, because the shorter the resistance, the smaller the heat generation. Some customers blindly request that our spot welding machine be equipped with longer cables, which is actually completely unnecessary. When generating more heat, copper plate water-cooled or water-cooled flexible secondary cables can be used.

4、次级电缆表面的绝缘问题，在使用率不高的情况下，也可以说电缆温度不高的情况下可以直接采用硅胶管或者热缩套管绝缘，发热严重的，可以选择耐高温的尼龙网管进行绝缘。

4. The insulation problem on the surface of secondary cables can be directly solved by using silicone tubing or heat shrink tubing when the usage rate is not high or the cable temperature is not high. For severe heat generation, high-temperature resistant nylon mesh tubing can be selected for insulation.

总之，如何电阻焊精密点焊机的次级电缆一般使用在低压大电流场合，不会有触电风险。在选配的过程中，满足要求的前提下，使电缆的电阻越小越好，散热效果越好的电缆，焊机输出更加稳定。

In short, the secondary cables of precision spot welding machines for resistance welding are generally used in low-voltage and high current situations, and there is no risk of electric shock. In the selection process, under the premise of meeting the requirements, the cable with lower resistance and better heat dissipation effect can achieve more stable output of the welding machine.

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