Water - cooled argon arc welding machine is a common cooling method.
In the ordinary self-cooling argon arc welding process, the tungsten rod is continuously welded at high temperature, resulting in slow heat loss, and it is easy to burn and damage the welding handle. Ordinary self-cooled welder and handle can only use small current for welding.
As a result, the tungsten electrode can only be used with a diameter below 2.4. However, in case of large thick pipes or welding seams, in order to speed up heat dissipation and increase welding current, the efficiency can be improved. Self-cooled welder and handle can not be continuous operation time, therefore, the choice of water-cooled welder is the best choice.
Because the specific heat capacity of water is greater than that of air, and the flow ability is good, so in the high current welding state. The temperature of argon arc welding handle is not high, which can not only avoid scald, but also give off heat better. While increasing the current, the coarse tungsten electrode with diameter of 3.2 can be replaced. Welding speed increases exponentially, especially in semi-automatic welding, water-cooled welding handle and welding machine penetration rate is the highest.
However, due to the complexity of the water cooling system and the need for additional equipment corresponding to the welding handle. Water - cooled welding machine failure rate and maintenance complexity is also a lot of difficulties. Today, we introduce the use of this kind of welding machine notes.
1. Water cooling system
The core of a water-cooled welder is that the flow of liquid must be supplemented by a pump system or external water source. Through the pressure into the welding machine inside the pipeline, pipeline through the welding of copper wire.
The heat generated around the tungsten electrode is removed from the outside of the tungsten electrode jacket after argon arc welding, and the heat is recycled into the pump through the backwater pipeline.
The water cooling system can be divided into one or two parts. Integrated cooling system. Supplied directly by the welding equipment manufacturer, the water-cooled circulating module is connected in series with the welding machine. After the welding machine is started, the cooling system must be opened at any time. After the series action of this step, it can directly protect the welding handle of the welding machine from burning damage caused by forgetting to open the cooling.
The system pipeline is divided into 1. Inlet waterway 2. Return waterway 3. Argon gas route. Among them, argon channels are independent of a tube that cannot penetrate into each other.
After opening the pump body, the thrust is generated to pressurize the water flow into the inlet pipe. The incoming water wraps the copper wire around the hose and into the handle to keep the heat out of the water. After argon arc welding, it goes into the backwater hose to take away the heat and enter the pump again. When wiring, inlet and return water cannot be connected inversely. Gas separate solenoid valve and hose. You can blow the gas when you take the pipe, if the gas is connected by a second pipe. This indicates that the water pipeline is water, and if the gas does not pass through the argon gas pipeline. After the pipe head is connected, the circulating water tank is opened, and the flow of water body indicates that the circulation path is unobstructed.
2. Split system
The split-body system is directly connected to argon arc welding handle without welding machine. The split-body water tank can be made by ourselves. Fill the water in plastic buckets or boxes.
Then, an additional pump or circulator is added for water exchange. Such cooling systems are flexible and easy to use. However, due to the need for additional control circuits, if you forget to turn on the pump after starting the welder, it will cause the burn through of the welder.
Water bodies need to be replaced after each week of use. Water should be purified and impurities are not allowed. Gas should be used every once in a while to prevent water pipes from being blocked. In the process of use, the water pipe should be prevented from being blocked and leaking. Once leaking occurs, it can only be replaced and cannot be used again.