Answers go – no go test after projection nut welding

Withstands breaking torque nearly twice that of standard specification

In Projection Nut Welding, to achieve error free results it is very important to apply constant and accurate current. In case the current is less than required it may lead to brittle welding. This kind of nut welding requires retapping. Also if the current is more than required it causes adverse effects like weakening the strength of metal or distortion of thread etc.

As the FORWEL – Kirti Constant Current welding controller assures constant current supply of the previously set current, it has no adverse effects on the thread and thus responds to go-no go test positively.

In this kind of projection nut welding, welded nut withstands breaking torque nearly twice that of standard specification.

The nut welding is strong and thus no retapping is required. This ensures proper locking torque and distortion in thread profile.

No Co₂ welding is required which results in minimizing rework and cost reduction.
Avoids frequent destruction testing.

Nut Size	Sheet Thickness (mm)	Standard Torque Peel strength (kgf-cm)	Minimum Torque Peel (kgf-cm)
			square nut	hex nut
m5	1.0 to 1.2	118	280	200
m6	1.2 to 2.0	149	350	250
m8	1.6 to 2.0	209	450	400

*  comparison chart for typical projection nut welding results on kirti Resistance Welding Machines with Forwel controllers

**  precise settings are required for getting the results