What is capacitor discharge welding?

Capacitive discharge welding, particularly for large-scale systems, is typically done using film-type capacitors. These capacitors store energy along alternating plates separated by a dielectric film. Charge is stored statically along the lengths of the plates. The basic configuration of the film capacitor is provided in Figure 1.

Does a film capacitor provide a similar voltage tolerance for CD welding?

Performance was evaluated based on current range behavior and metallographic response. Conclusions from this work include: to film capacitors – An array was developed to provide similar voltage tolerance and system capacitance to a standard film variant conventionally used for CD welding.

Can electrolytic capacitors be used in large-scale CD welding applications?

In this study, the suitability of electrolytic capacitor arrangements for use in large-scale CD welding applications was investigated. Baseline for the study was a set-up using a 1280-μF main capacitor. The application was a mild steel weld nut with three projections attached to a similar material substrate.

What are plastic film capacitors?

Plastic film capacitors are generally subdivided into film/foil capacitors and metalized film capacitors. Film/foil capacitors basically consist of two metal foiI electrodes that are separated by an insulating plastic film also called dielectric. The terminals are connected to the end-faces of the electrodes by means of welding or soldering.

What temperature should a film capacitor be stored?

Burning droplets or glowing parts falling down shall not ignite the tissue paper. Burning droplets or glowing parts falling down shall not ignite the tissue paper. Film capacitors should be stored under temperatures conditions from - 25 °C up to 35 °C, with relative humidity of 75 %.

Do electrolytic capacitors yield identical weld performance results?

The results presented here indicate that electrolytic capacitors, configured to provide similar charge voltage and energy storage, can yield identical weld performance results. Process, mechanical strength, and metallographic results are all identical for the two capacitor arrangements.