Jan
03
New Energy Material Manufacturers introduces the upgrade case of the electric control system of the slitting machine:
1) Upgrading of automatic tension control system
The early slitting machines were simple in structure, and the technology and control methods were backward. The tension in the winding control relies on manually adjusting the spring clutch or potentiometer to control the execution unit, which is affected by the linear change of the torque and the mechanical error, and the accuracy is very poor. This kind of open-loop tension control makes the tension fluctuate greatly in each process of the slitting equipment, and cannot guarantee a constant tension during the winding and unwinding process, which eventually leads to uneven width and winding diameter of the finished coil, making it difficult to meet the specifications. For some materials that are easy to stretch, it may even cause tear damage, greatly reducing the yield rate and increasing the reject rate.
The solution is to add a tension controller, a tension sensor, and a magnetic powder clutch on the basis of the original equipment to form a closed-loop control system to achieve high-precision slitting machine tension control. The estimated cost of the renovation project is about tens of thousands of yuan. Compared with the high cost of hundreds of thousands of yuan for a new slitting machine, it saves capital investment and can meet production needs. Generally, a pair of tension sensors are respectively installed at both ends of the detection roller. When the film material passes through, the pressure is transmitted to the pressure sensitive sensor through the detection roller, and the actual tension value is measured by the size of the deformation, and then converted into a standard signal by the tension amplifier and output to the PLC. , the PLC compares the received signal with the set value, and generates a control signal for the magnetic powder brake to adjust the tension, so that the system tension is always equal to the preset value and reaches a constant state. This method does not need to consider related compensation or mechanical error, and the control accuracy is very high.
2) Upgrading of automatic deviation correction control system
The deviation correction system of the slitting machine can timely correct the phenomenon of horizontal serpentine deviation during the rotation process due to the unevenness of the coil. The faster the speed, the more serious the deviation. The early slitting equipment was corrected by manually fine-tuning the guide rollers horizontally. Due to uncontrollable factors such as roller axis accuracy errors, mechanical vibrations or tension changes, it was time-consuming and laborious and had large errors. Especially in some high-speed film cutting occasions, the operator has no time to respond, resulting in uneven or even damage to the film coil, resulting in a large number of waste products, which cannot meet the needs of the automated production line.
The solution is to add an automatic deviation correction control system on the basis of the original equipment, which generally includes a deviation correction sensor, controller and actuator. The sensor monitors the lateral position of the material on the slitting machine. When the position deviates, the controller sends instructions to the drive mechanism through analysis and calculation, so as to adjust the deviation correction frame to move laterally to the reference position, forming an automatic closed-loop control. The detection methods include infrared, ultrasonic, laser, inductive or CCD devices. The correction objects include the opposite side, the mark line and the middle position. The correction position includes unwinding correction, middle correction and winding correction. Which solution to use needs to be determined in combination with the cause of deviation and the characteristics of the material.
As the level of intelligence of the slitting machine is getting higher and higher, automation upgrading and transformation can not only reduce material waste and labor costs, reduce the operating burden of workers, but most importantly, create significant economic benefits for enterprises. Even so, there are certain risks in the automation transformation of slitting machines. The failure of transformation will not only lose investment costs but also cause shutdown and production stoppage. Lipu Machinery has a large number of operation cases in the field of slitting machine upgrading and transformation, and has accumulated rich transformation over the years Experience helps slitting machine manufacturers to realize the transformation of automation and intelligence.
Through the above introduction, Medical Healthcare Material Manufacturers hopes that you can simply refer to the content of this article in future use.
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