Hot shears

High cutting power

The hydraulic shears for hot cutting plants are designed to be used with integrated systems for the whole automation of the bar cutting cycle

The typical cutting plant consists of:
■ Automatic loading bench receiving the bar bundles; it loads one bar at the time on the roller table.
■ Roller table leading the bars to the induction furnace with an adjustable speed according to the heating needs.
■ I nduction furnace for the progressive heating of the bars up to the molding temperature.
■ Hydraulic shears

The shears are power supplied by a power unit with a tank whose capacity reaches 1200 liters.

The hydraulic driving system has been dimensioned to achieve high cutting powers with a maximum pressure of 350 bars.

The flow rate is delivered by variable flow rate pumps with a constant power, flow rates up to 250 l/min and a maximum of three motor-pump groups.

In addition to the control of the main cutting cylinder and of the pressing cylinder, the hydraulic system, through the gauge cylinder, controls also the length of the piece to be cut.

The measurement precision is ensured by the use of a servo-valve which allows at maximum a decimal error.

In order to avoid interferences due to pressure drops, the servo-valve driving is operated by an auxiliary pump. Furthermore an accumulator is required for the flow rate storage in order to avoid possible tracking errors while the bar is pushed into the furnace.