Slitting machine unwinding tension detection system
(1) Tension sensor detection: It is a direct detection of tension, closely combined with the machine, and has a detection method for moving parts. Usually two sensors are used in pairs, and they are installed on the end shafts on both sides of the detection guide roller. By detecting the applied load on both sides of the guide roller, the strip detects the actual tension value and converts the tension data into a tension signal to feed back to the tension controller;
(2) Floating roller indirect tension detection system: install a floating roller in front of the aluminum foil tracking roller, the position of the floating roller is detected by a potentiometer, and the tension control method is to keep the tension constant by maintaining the position of the floating roller;
(3) Use the magnetic powder clutch to control the rotational torque of the input winding roller to achieve tension control: the magnetic powder clutch is composed of a driving part and a driven part, connected to the winding roller through a transmission mechanism such as a universal coupling, and filled with fine iron in the middle. Magnetic powder acts as a torque transmission medium. A certain current is passed into the excitation coil to form a magnetic field, and the magnetic powder is magnetized. The melted magnetic powder attracts each other to form a chain arrangement. When the active part rotates at a constant speed, the coupling force between the magnetic powder is destroyed to form a circumferential tangential force. The product of the tangential force and the radius of the magnetic powder ring is the driven part. The winding torque realizes the coupling of the output torque from the active part to the driven part in continuous rotation, so as to achieve the purpose of tension control;
(4) Slitting and unwinding capacity and speed tension detection system mainly uses magnetic powder tension brake to control the unwinding speed. Its working principle is that a coupling is installed in the magnetic powder brake, and input parts and output parts with magnetic coils . Below the magnetic coil is an annular groove, and below the groove is an annular rotor, that is, the output component. An annular groove is located in the center of the output part, and the groove is filled with magnetic powder. When there is excitation current in the magnetic coil, the coil will generate magnetic flux to arrange the magnetic powder along the direction of the magnetic field, so that damping will be generated between the input part and the output part, and the magnitude of the torque will be transmitted. If the tension and speed applied to the aluminum foil are increased or decreased, the tension and speed can be effectively controlled by changing the magnitude of the excitation current, or changing the current value or voltage value applied to the coupling coil by the amplifier.
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Post time: Apr-25-2023
