Research Of The Welding Method And Technics On Rotating Arc Of Hollow Stud

In the paper,the different affects of the horizontal,vertical,and the cusp magnetic field to the arc of stud are compared and analyzed.Use vertical magnetic field to make the arc can move along the direction of hollow stud tangent.Through analyzing the structures of the Germany SOYER stud welding STG-1 spin-arc device,the work processes and the circuit principle, develop specialized Rotary Coil,and choose the right diameter of a winding enameled wire, calculate out the relationship of the input voltage of the coil and the magnetic field strength. Design the Rotary arc device structure,the size,the diameter and the coil turns.Design a special Rotary Coil device.Realize the arc of hollow stud rotating uniformly.Its properties are better than the SOYER stud arc welding equipment.In order to realize the welding process automation,design the PLC control procedures of the Rotary arc welding process, and develop a welding torch run institutions.By using the SOYER BMH-22SV3000A with the pull-stud arc welder and PH-5L stud welding torch,the STG-1 spin-arc power and self-developed spin Coil devices,do a large number of welding process tests on the hollow studs of outer-diameter 12 mm,and obtain high quality welding joint.The tests get a Welding Technology normalized window:welding current 850-1000 A,welding time 500-800 ms,pre-welding time 60 ms,Rotary arc current 0-2 A,upgrading a high degree of 2 mm,pre-compression of 3 mm.The tests and inspection results show that in the magnetic field,the hollow stud welded joint appears uniform and beautiful and the stud wall-lap fusion rate reaches to 100%,the interface strength reaches to 390 MPa greater than its own strength.Through a lot of welding technology and inspections,the rotary arc stud weld exists "internal adsorption phenomenon" phenomenon.In the welding process,the molten metal in the magnetic field assembles to the inside wall of the hollow stud,and a complete cladding layer is formed,and the size of stud and the matrix increase.The wall cladding layer of metal cladding and the rotation are proportional to current arc.