• Conweld Engineering Services

Capacitor Discharge Welding Studs

Conweld Engineering Services, an ISO 9001: 2008 certified company, manufactures speciality weldable fasteners for stud welding and projection welding, as well as products and consumables for arc stud and capacitor discharge stud welding systems. The company offers Capacitor Discharge Welding Studs. The welding of fasteners to light-gauge metals demands a system, which minimises the depth of penetration of the weld. The capacitor discharge range of studs, which has been specially developed for this purpose, have found increasing application in almost every type of sheet-metal fabrication, in many cases providing a spectacular cost saving over alternative production processes. Employing a weld time cycle of less than 1/100th of a second so that only the outer skin of the component/job and the end of the stud are melted, results in a shallow but nonetheless strong weld. Consistent results are obtained in a wide range of materials, even on very light-gauge sheet, low-carbon and stainless steels down to 26 gauge and all weldable non-ferrous materials down to 22 gauge. In most cases, the reverse face can be pre-finished by painting, plastic coating, plating or anodising, before welding, without fear of heat damage. How it works: in capacitor discharge stud welding, the welding energy is obtained from banks of capacitors that have previously been charged to the voltage selected for the particular application. Energy is discharged through the stud itself, giving a high density current which disintegrates the small pip/projection on the base of the stud. This leaves an ionised gap between stud and work piece across which the welding current continues to flow, in the form of work piece, completing the weld. The system operates on a single-phase 50 Hz AC mains supply at 220/240 V.