What Is a Welding Torch?
The welding torch refers to the part that performs the welding operation during the welding process. It is a tool used for gas welding. It is shaped like a gun with a nozzle at the front end and emits a high-temperature flame as a heat source. It is flexible to use, convenient and quick, and the process is simple. [1]
- According to the different wire feeding methods, welding torches can be divided into two types: wire drawing torches and push wire torches.
- The angle between the axis of the welding torch and the axis of the welding seam during the welding process is called the inclination of the torch, and is simply referred to as the inclination of the torch. The torch angle is a factor that cannot be ignored. When the torch angle is between 80 ° and 110 °, whether it is tilted forward or backward, it has no obvious impact on the welding process and the formation of the weld. However, if the inclination angle is too large (such as forward inclination angle> 115 °), the melting width will be increased and the penetration depth will be reduced, and the splash will be increased
- Effect of torch angle on weld formation
- As can be seen from the figure on the right, when the welding torch and the weldment form a backward inclination (the arc always points to the welded part), the weld is narrow, the remaining height is large, the penetration is large, and the weld is not well formed; At the inclination angle (the arc always points to the part to be welded), the weld is wide, the remaining height is small, the penetration depth is shallow, and the weld is well formed.
- Usually welders are accustomed to holding the welding torch with the right hand. When using the left welding method (welding from right to left), the welding torch uses a forward inclination angle, which can not only obtain better weld formation, but also clearly observe and control the molten pool. therefore