The task is the modernization and series production by the industrial partner of five different types of welding equipment, furthermore, the agreement about the license fee of production. In the past 7-8 years the welding equipment of different types AC/DC-TIG, field and MIG-MAG have been developed in the Department. Their series production started in 1998-2001. But the modernization of AC/DC-TIG types, first of all, became timely in 2005. This is the main aim of the present project.