Poka Yoke your Torque Assembly Process with the Kolver Electric Screwdriver
“Stupid thing, doesn’t work to its full potential!”
How many times have you said or heard someone say this? This problem most likely occurred during the final assembly process of tightening the screws. Manufacturers spend countless thousands, even millions, of dollars developing a product. Dollars spent on design, material, moulding machines, robotic assembly systems, jigs and fixtures, work stations… only to see all their hard work undone due to missing or incorrectly tightened screws!
Kolver DC Electric Screwdrivers and Nutrunners will make sure every screw is installed and it is correctly tightened. Learn how to get the most out of your Kolver units:
1. Screws missing
Tell the Kolver controller how many screws are in your assembly and it will count each screw, giving an OK/NOK (Not OK) signal after each screw is tightened. When all screws are correctly fastened, it will give a separate ‘cycle complete’ signal.
2. Under/over torqued screws
You can program the target torque you wish to achieve and set control limits. If the screw is tightened within the control limits, an OK signal is given. Any screw tightened outside the control limits will get an NOK signal.
3. Crossed threads
Crossed threads are detected with the inbuilt angle encoder. The degree of an angle for a correctly tightened screw are compared against a cross-threaded screw. Angle control limits are programmed so if the screw is tightened within the control limits, an OK signal is given.
4. Stripped threads
Stripped threads are detected and given an NOK signal when the screwdriver does not reach the temperature within the screw tightening time limit.
5. In complete rundowns
Incomplete rundowns are detected and given an NOK signal when the screwdriver is disengaged without reaching the target torque.
6. Re-hits
If the operator chooses to tighten the same screw twice, an NOK signal will be given when the angle encoder determines the screw is not within the pre-programmed angle control limits.
7. Missing spring washers or gaskets
Missing spring washers or gaskets are detected with the inbuilt angle encoder. The degrees of angle are compared against a screw tightened with the gasket against a screw tightened without the gasket. Angle control limits are programmed. If the screw is tightened within the control limits, an OK signal is given. Any screw tightened outside of the control limits will get an NOK signal.
Using a Kolver screwdriver is like having a quality control inspector checking every screw tightened. Contact Hawker Richardson today.
