ST-22 CUTTING TOOL FOR HARD TURNING WITH COOLING

Compared to grinding, the main advantage of hard turning is its high flexibility and the ability to perform all operations in one part clamping.

This is especially important when machining complex geometrized workpieces (with a large number of short surfaces of different shapes), as well as machining a combination of external and internal surfaces.

Particularly when boring holes, machining planes and tapered surfaces are required.

Economic efficiency of hard turning is based on calculated data that also takes time factor into account.

Hard turning machining time is always shorter than grinding time.

Hard turning is considered a replacement for grinding operations or as a pre-grinding process.

Boring holes, the machining intensity of hard turning is much higher.

Machining disc-type parts, machining time is significantly reduced.

Hard turning means the requirements of accuracy and surface finishing quality.

The high intensity of heat dissipation is achieved by reducing the coolant temperature in the closed circuit, provided by a heat exchanger with an assembly of four TEC Peltier.

The cooling capacity of the TEC assembly of 400 W ensures the coolant temperature to be maintained at 9°C when the turning speed is increased to 300 m/min.

Coolant reduces the maximum temperature in the cutting zone by 12%

and minimum temperature by 32%. 

Closed cooling system usage provides the cleanliness of the machined surface and increases the replacement plate wear resistance.

The increase of heat dissipated from the cutting zone to the tool at higher cutting speeds guarantees high machining quality and tool life.

The internal heat dissipation is the only promising option since hard turning cannot provide external coolant, and the workpiece cooling is inefficient.