Sawing machines

Sawing machines

As compared to other machines, for example band saw machines, the circular cold saw machines for the cutting of tubes, bars and profiles offer qualitative, technological and processing advantages. In particular they are featured by a higher cutting accuracy and repeatability, a better quality of the surface finishing with a higher productivity and a reduced scrap quantity.

In order to guarantee a higher cutting accuracy and repeatability, Duplomatic Oleodinamica has
developed for this machines a special direct operated proportional valve with integrated electronics capable to allow a better control of the cutting head during the machining procedure.

According to the different kind of material to be processed, for example aluminium, brass or high tensile alloy steel, the shifting speed of the cutting head can vary from a maximum of 130 mm/sec to a minimum of 0.3 mm/sec. At the end of the machining process the head must go back to its starting position ready to restart for a new cycle with a position speed of 250 mm/sec.

Apart from personalizing the electronics of this specific application, Duplomatic Oleodinamica has studieda special spool capable to control both very small flow rates (right for these kinds of speeds) up to a minimum of 0.02 l/min, and bigger flow rates up to a maximum of 20 l/min. Considering the different speeds required by the present application, the use of a normal proportional valve with a standard asymmetric spool would have caused speed and repeatability controlling problems.