A welding system for heat welding a component to the contact surface workpiece is provided with a carriage and a component holding positioning unit and workpiece melting unit. The component holding unit and workpiece melting unit each include a respective hooked-shaped holding arm assembly and an associated support assembly used to secure and movably mount the holding arm assembly and an associated support assembly used to secure and movably mounted the holding arm assembly to the carriage. A heating or welding unit is mounted towards a distal end of the holding arm assembly, and which is operable to melt the contact surface when moved thereagainst. The component holding unit is provided with a component holder operable to fixedly grasp or release the selected component in its mounting to the workpiece. The carriage is provided for rotatable movement relative to a rotation axis to selectively move the component holding unit and workpiece melting units between melt operations position, wherein the heating or welding unit is brought into contact with the workpiece and activated to soften or partially melt the contact surface in advance of the component being moved thereagainst; and a fixture placement position, where the component holder moves the component into juxtaposition with the softened contact surface to cool and fuse with the workpiece.