projection welding  - Resistance Welding Controller

 

 

Bullet Heading Get perfect Projection Nut Welding

projection welding - Answers Go - No Go Test

  • Answers go - no go test after projection nut welding

projection welding withstands twice breaking torque

  • 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

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Comparisions With CD Machines:

Sr. No. CD Machines Resistance Welding Machine with
FORWEL- Kirti Weld Controller
     
1. No control during process Controlled feedback
2. Very slow, takes long time to get ready for next weld Fast, instantly ready for next cycle
3. Heavy cost of capacitor replacement each year. No such Hidden Cost
4. More down time due to cap maintenance Fit and Forget
5. Gives faulty output at the instant of capacitor short. Fit and Forget
6. No air required Air / water required
7. Costly initial setup Machines cost less
8. Limited to Projection welding Versatile for spot welding, projection welding with little or no modification
9. Low connected load Higher connected load
10. Claims low energy for spot Higher energy for spot
Offset by continuous runnig of hydraulic motor and capacitor life.
11. No computer networking PC interface possible for reliable data collection.
12. Better for non ferrous welds Non ferrous welds can be made with few changes.

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Designed By - Rutuj Worth Concepts