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Duratrim Edge Scarfing Equipment

Duratrim edge scarfing system

Duratrim is a unique edge scarfing system for welded tube mills, it enables the manufacturer to trim and clean the steel coil edges as it enters the tube mill prior to the forming station.

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:

  • Reduced welding energy
  • Consistent homogenous weld integrity
  • Reduced strip width /costs
  • Ability to weld more challenging materials
  • Reduced rejects
  • Less OD /ID welding flash (bead)
  • Less ‘splatter’ from weld zone
  • Consistent strip width leading to fewer rejects
  • Unit runs ‘dry’ without emulsion
  • Increased life of Impedors and OD / ID scarfing tools
  • Increased yield
  • Correct all slitting problems

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.


About the system.


In Tube Mill Line