What is the function of the torch in gas welding?

The function of the torch in gas welding is to mix and control the flow of gas and oxygen, which is essential for producing the flame that melts the base material and filler material. The torch is designed to allow the welder to adjust the ratios of acetylene (or other fuels) and oxygen to create the appropriate flame needed for the specific welding application. This precise control over the gas mixtures is critical for achieving successful welds, as different metals and thicknesses require specific flame characteristics to ensure clean, strong joints.

While holding the welding wire, providing an electric arc, or shielding the welder from sparks are important in various welding contexts, they do not pertain to the primary function of the torch in gas welding. The torch’s role in mixing and supplying the right gases directly influences the quality and effectiveness of the welding process.