Commercially slit coils can have often have as much as 35% of their edges that are not cut cleanly; this can be due to many factors such as bad practices, poor quality material and badly worn tooling. The result of this is that edge presentation at the welding point will be poor and welding heat has to be increased to ‘melt’ more material, excessive ‘squeeze pressure’ also has to be applied to avoid defects.
These issues will increase material and energy costs as well as creating an excessively large inside / outside welding flash that then has to be removed.
The Duratrim edge scarfing system removes these problems and trims the strip edges at the required rate thus ensuring clean and parallel faces meet together at the welding station.
This process helps you realise significant benefits:
Duratrim is a simple but effective design with one of the most unique methods of shaving the strip edges. This is due to the ‘floating’ design of the scarfing assemblies which allow the unit to follow the path of the steel strip whilst maintain positive contact pressure on the scarfing inserts.
The system utilises 4 x sets of special scarfing inserts which remove material from the strip edges, top and bottom. The inserts are supported and kept in position by pneumatic cylinders (8 in total), the pressure of which is adjustable enabling different amounts of material to be removed. All sets of inserts are mounted on a floating mechanism ensuring constant material removal even with movements in the strip.
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