Stud welding query

Answer no there will not be enough power to complete the weld. The welders you list are for thin sheet metal and will over heat or just cutout if you try.

Buy or rent stud gun. The capacitor bank and the scr to discharge it with will cost you more. Also you are just trying to make a square block act like a round whel with ball bearings.

The capacitors are charged to the required voltage via a multitapped transformer.

What size pins / studs do you need to attach? How many?

< (want to) -- use the capacitor discharge stud welding gun with the transformer of arc/mig/tig welding set. >

• If you have a large Microfarad Capacitor( in the Stud Welder's energy storage Circuit)
• And the diameter of the stud you would weld is small,
• Then 1 pulse could be enough to fuse the stud end( under axial pressure)--and the job is DONE.
• For this1 pulse , any AC source feeding through a suitably rated power diode will charge the energy into the Large Capacitor in a few seconds. 1/2CV² Joules^.
• All you do it now is discarge the stored energy from the Large Capacitor in to the welding current path through a High Capacity Thyristor OR Power -Transistor by triggering OR base-current-passing.
• If this Large Capacitor can take the High Storage Peak Voltage( say 400 Volts DC PEAK)-- and the Discharge Circuit's Thyristor/Power-Transistor can take it before discharging to stud-weld, then you could as well charge the Capacitor from Mains AC -say 240 volt rms.
• The 3 types machines' Transformers' AC open-circuit Volts come much lower -say 30 to 60 VAC.So you Charge say 20% of what energy you will, if you charge direct from AC mains. You will still need the Charging Power Diode .
• Of course you can Charge the large Microfarad Capacitor directly from Dc welding current terminal off any of the 3 types of machines- - You will have to go by the machine's handbook regarding surge current into the Large Capacitor. This will necessarily be slower and lot less-energy than Charging from Mains. So in Summary - charging from your 3 welding machine Types will be hindrance than help.

If of course you go for a dedicated versatile new Stud Welding Machine--all your problems are already taken care of! Do you want one? From China?I have good contacts.

Not to mention each size stud and material combination need a different voltage. The discharge has to be instantanious and the stud pushed in to the puddle at the correct rate. Buy or Rent.

Thanks. Can you plz mail me those contacts from china, i think buying is a better option.

Buy from the best. This Co. makes anything up to 1200Amps SAW welders, 630A Mig/Mags ----.

Ask Ms. Juan Wang

Her E-mail : byshjsales@126.com website > www.byshj.com .Located near Beijing

You can see specs. of their 3 earlier models:

RSR1600 takes 230Volt-1.4KVA GOOD FOR STUDS M3toM8 Weight 35Kg.

RSR2600 takes same 230V,2.5KVA --Will weld Studs M3 -M10. Weight 70Kg

RSR3800 TAKES 380-400Volt ,3.5KVA. Will weld Studs M3 to M12. Weighs 140Kg.

For all 3 models base sheet thickness can be 0.2 to 3mm. Do you want other Specs.?

Ask Ms .Juan Wang if she can offer other special models .

Tell where/how to ship to - ask how to pay through bank-what paperworks needed.

Above all ,please ask her to offer you good terms-that myself MUKUL MAHANT referred to you, and you will spread her Co's name as her brand ambassador if her machines work as promised.

A High tech Co. but most reasonably priced.

I know 4 more makers of Stud and Resistance welders in China-but this one is best.

Thanks. You people rock here on globalspec and your help is really appreciated.