Analysis on magnetic control stud welding device with the open-close Structure

Abstract

Arc stud welding is widely used to fix joints like studs, screws, pins, or similar elements on various products. The main defects in the process of large diameter stud welding are arc offset and non-uniform melting. In order to solve the problems, which seriously affect the installation strength of stud, the magnetic confinement device with the open-close structure is used to improve the quality of stud welding. An open-close magnetic confinement device suitable for robotic stud welding system is designed to create rotatable magnetic field. Rotating magnetic field can drive arc deflection. The magnetic field produced by magnetic confinement device is simulated. The distribution and intensity of magnetic field is analyzed. The influence of the design parameters of magnetic confinement device on the magnetic field is studied. According to the practicability and the size limitation of the magnetic confinement device, the appropriate parameters are selected. The prototype of the magnetic confinement device is tested by stud welding. The results show that the open-closed magnetic confinement device designed with reasonable parameters has good inhibitory effect on the arc offset.