精密點焊機電源通過次級電纜把能量傳送給焊點，使工件能夠牢固的焊接起來，經常有客戶來問電纜多長，多粗,電纜如何絕緣等等問題，下面蘇州威爾達焊接為您解答次級電纜如何選配的問題。

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、電纜的選擇應該選擇銅材，畢竟銅的電阻小，導電性能好，相對其他銀基材料適中，發熱量少。

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、電纜結構選擇銅板還是多股銅線，要看使用場合。一般來說電流越大，結構和動作固定，更適合直接選擇銅板。而小電流的情況下，具有獨立輸出變壓器和獨立焊接機構的情況下，一般選擇多股銅線。2萬安培以上的精密逆變點焊機輸出一般直接采用紫銅板，而2萬安培以下輸出的電流情況下，一般采用柔性的多股銅線，而且單股銅絲越細，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、銅線采用多長?理論上來說，是越短越好，因為越短電阻越小，發熱更小。有些客戶一味的要求我們的點焊機配置更長的電纜，其實完全沒有必要。發熱量更多的情況下，可以采用銅板水冷，或者水冷柔性的次級電纜。

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、次級電纜表面的絕緣問題，在使用率不高的情況下，也可以說電纜溫度不高的情況下可以直接采用硅膠管或者熱縮套管絕緣，發熱嚴重的，可以選擇耐高溫的尼龍網管進行絕緣。

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.

總之，如何電阻焊精密點焊機的次級電纜一般使用在低壓大電流場合，不會有觸電風險。在選配的過程中，滿足要求的前提下，使電纜的電阻越小越好，散熱效果越好的電纜，焊機輸出更加穩定。

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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