Have positive and negative electric welding machine, electric welding pliers with which side up to the
How low-level issues, no matter which wire connection holder can, due to the positive and negative exchange.
Fine！ The manufacturer's instructions are mostly negative!
According to the electrode or work needs to choose positive and negative pole
There are positive and negative output points of the machine, the machine is said: DC welding machine;You mentioned the pliers, you can determine which is a DC arc welder;Want to know the DC hand arc welding machine, which output head ground wire, which output first welding line, please look down;When welding operation, there were two kinds of connection method: straight connection method and reverse connection method two kinds;Positive welding - welding workpiece welding machine output power positive electrode, welding rod welding machine output power negative electrode wiring method, also called positive polarity.Reverse connection - welding workpiece, welding machine output power negative pole, welding rod welding machine output power positive pole wiring method, also called reverse polarity.Generally speaking, the principle of polarity is used:Reverse welding is used for basic electrode welding;Because the basic electrode welding by hand welding, arc combustion instability, splash, arc sound is very hot, and easy to produce porosity. When using reverse connection, arc combustion is stable, splash is small, and the sound is even and even.The positive welding method is adopted for the manual welding of acid welding rod;The welding pool is deep welded by the positive welding method. The weld seam is narrow and the welding height is high;Reverse welding, welding, welding pool shallow, weld width, Han Duiping (short);Connect / reverse connection does not affect the function, only affect the welding effect;For occasions where the requirements are not high, some welders try both positive and negative, and it is good to try them at ease;
