Магистерская диссертация тема работы Разработка цифрового двойника технологического процесса с использованием производственных данных

1.7.1 Tension roll

The function of this roll, mounted on both sides on the high precision electronic load cell, is to permanently monitor the film tension just ahead of the contact roll and to wind the film at a constant tension.

Winding with tension control is possible in gap or contact modes.

The software calculates of the AC motor torque according to the tension setpoint and the mill roll diameter.

The load cell (located on the tension roll) measures the film tension and corrects the torque of the motor to have a tension equivalent to the set point.

The tension is set on the CPCS winder tension view according to the mill roll diameter. The winding is done in torque regulation with speed control to avoid having over-speed in case of film break.

1.7.2 Contact roll

The function of this roll, is to remove air between the film layers and to maintain the layers.

1.7.3 Contact winding

The film is wound with the contact roll pressing the mill roll.

A pneumatic regulator controls the pressure applied to the mill roll to ensure a constant contact pressure (the contact pressure is defined in the CPCS winder pressure view according to the mill roll diameter).

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Every time the carriage reaches the detection switch it starts moving backward till it pulls away again. The contact mode used for a thin film with thickness < 36µ.

As the film is thin, there is air between the layers when winding. So, to remove it, it is necessary to apply more pressure on the roll (air gives bad characteristics to the film (waves)).

Winding with tension control is possible in gap or contact modes.

The software calculates of the AC motor torque according to the tension setpoint and the mill roll diameter.

The load cell (located on the tension roll) measures the film tension and corrects the torque of the motor to have a torque equivalent to the set point.

The tension is set on the CPCS (Computerized Process Control System) winder tension view according to the mill roll diameter.

The winding is done in torque regulation with speed control to avoid having over-speed in case of film break.