Welding is a manufacturing process and technology that uses heat, high temperature or high pressure to join metal or other thermoplastic materials such as plastics. According to the state of the metal in the welding process and the characteristics of the process, the welding methods can be divided into three categories: welding, pressure welding and braze welding.

Welding refers to the joining or fusing of workpieces by heating and/or compression to form a continuum. The fusion of weldments can be based entirely on the heat generated by the arc to fuse the weldments.

Welding is a technique and process for joining metals or other thermoplastics by heating or pressing.

The main advantages of the SAW process are high quality and high productivity. The process can be implemented in three different operating modes-semi-automated, mechanized and automated.