Projection welding nuts 2

[7056244]

I need to know what the force required for projection welding an M14 and M12 nut is. Is this something that could be done with air cylinders ,festo etc. As of now I am only familiar with projection welders that are stand alone wiht bowl feeder etc. I would like to incoperate this process within our current clamping welding procedure. Making it fully automated. Any information would be gratly appreciated.

 

[TVP]

The force required for set-down will depend on what type of weld nut you are using, as well as the dimension of the pilot height (if it is a piloted design). I recommend using DaimlerChrysler Corporation Process Standard No: PS-1804, WELD NUTS - PROJECTION WELDING as a guide for this type of process-- it gives details on suitable weld schedules, requirements for push-off forces, torsional strength, etc.

As an example, for a TYPE EE piloted projection weld nut (6 projections), Property Class 10, the weld schedule would should look like this:

Electrode Force Weld Time Current
Newtons (Lbs) cycles K-amps

M12 (1.19 mm pilot) 6670 (1500) 11-13 22-24

(1.178 mm pilot) 8900 (2000) 16-20 23-25

M14 (1.19 mm pilot) 8900 (2000) 14-16 25-27

(1.78 mm pilot) 10680 (2400) 19-23 26-28


I guess everything is relative, but the forces aren't that high, though I don't claim to be an expert in pneumatic cylinders. Good luck with your project.