Regarding the question of whether the "-" level (usually refers to the negative pole or ground wire) is connected separately when welding cables, it is first necessary to make it clear that during the welding process, especially when using an electric welder for cable welding, it is indeed necessary to ensure that the positive and negative poles (i.e., the "+" and "-" levels) of the electric welder are correctly and firmly connected to the weldment.
This is because the working principle of the electric welder is to discharge between two workpieces, generate high heat and fuse them together to achieve welding. The positive and negative poles of the electric welder are responsible for providing the current and voltage required for this discharge.
Specifically for welding cables, the "-" level (negative pole) here is usually connected to a specific point of the weldment through the welding cable, while the "+" level (positive pole) is connected to another point of the weldment or the welding gun. In this way, when the electric welder is working, the current will flow out from the positive pole, pass through the weldment and welding materials, and finally flow back to the negative pole to form a complete circuit.
Therefore, the "-" level (negative pole) of the welding cable needs to be connected to the weldment separately. When connecting, you need to pay attention to the following points:
1. Ensure a firm connection: The negative pole (and positive pole) of the welding cable must be firmly connected to the weldment to prevent it from falling off or loosening during the welding process, affecting the welding effect and equipment safety.
2. Choose suitable cables and connectors: According to the welding needs and equipment requirements, choose suitable welding cables and connectors to ensure that they can withstand the current and voltage generated during the welding process.
3. Take good safety protection: When performing welding operations, personal protective equipment such as protective glasses, protective masks, protective gloves, etc. must be worn to prevent splashing sparks and molten metal from causing damage to the eyes and skin.
4. Follow the operating procedures: Strictly follow the operating procedures of the electric welder to perform welding operations to ensure the safety and effectiveness of the welding process.
In summary, the "-" level (negative pole) of the welding cable needs to be connected to the weldment separately, and during the connection process, attention should be paid to the firmness of the connection, the selection of suitable cables and connectors, safety protection, and compliance with operating procedures.