Abstract: This paper introduces the application of UniMAT PLC on the non-woven slitter. Non-woven fabric cutting machine is a kind of equipment for cutting wide material according to different needs in the production process. Non-woven fabric slitter is mainly used to slit wide coil into various narrow coil suitable for production needs. Slitting process includes two processes: unwinding material and winding material. Tension control of unwinding material and winding material is the key link of the striping machine. The machine is based on the original electronic control system to add automatic edge control, achieved the desired effect, improved machine performance, so that the machine in high-speed operation more stable, winding flat, simple and convenient operation, safe and reliable, durable.
Keywords: UniMAT PLC, automatic control, slitting machine
1 Introduction
Non-woven fabric cutting machine is mainly used for cutting edge of non-woven cloth and other wide coil. The paper tube diameter is 75, the non-woven cloth outer diameter is 600, the length is 1600, non-woven cloth base material non-woven cloth, cut into actual size of several rolls, the narrowest can be cut to 18.
2 working principle
The system is composed of several parts, such as billionaire PLC, magnetic powder brake device, tension sensor, rectifying device, angular displacement sensor, traction spindle (driven by servo motor), two servos driving A-axis B-axis winding and cylinder respectively. The traction spindle and the magnetic powder brake device transmit the nonwoven fabric with constant tension. The deviation correction device is responsible for the deviation correction during the operation of the nonwoven fabric. The spindle is controlled by position mode and the AB shaft is limited by speed in analog torque mode. The speed and torque are adjusted continuously to achieve synchronous winding and control the strength of winding. The whole system is precise, stable and reliable. It adopts PLC intelligent design and has powerful functions, such as automatic zero stabilization, digital display, over-limit alarm, transducer output, current regulation output or time proportional output. As follows:
3. system composition
(1) rack part
It is welded by thick steel plate.
2) winding up part
There are two coiling A and B shafts, both driven by a 5KW servo motor and three inch inflatable shafts, and the speed of A and B shafts can be adjusted separately.
3) unwinding part
The 3 inch bloating reel and tension sensor and magnetic powder clutch are used to control tension.
(4) cutting part
The knife can be manufactured with either an industrial blade or a flat blade (artistic blade), and the knife pitch can be adjusted between 18mm and 1600mm.
(5) host part
The spindle adopts 5 KW servo motor.
(six) guide roller part
The whole machine adopts chrome plated steel pipe, each of which is treated by dynamic balancing.
(seven) electrical part
It is composed of billion-dimensional PLC system (224 CPU, 16DI/16DO, 8AI and 2AO), HMI system, low-voltage electrical appliances, sensors, actuators, etc. One billion PLC system configuration is shown in table 1..
Table 1: configuration of PLC system:
Compared with the similar products on the market, the Uyghur CPU224-2Q has the following outstanding features: adding additional PPI communication ports, eliminating the trouble that customers can not use touch screen and programming cable communication ports at the same time, and can only plug and unplug ports constantly; no batteries, power-down data can be provided for up to 10 years to maintain; faster command execution speed A single Boolean operation instruction is three times that of a similar Siemens product; it is compatible with the Siemens S7200 instruction set; it can directly replace the Siemens 224 controller module. The appearance of UniMAT CPU224 product is shown in Figure 2.
4 control process
A. the system is divided into two parts: manual and automatic. When wearing non-woven fabric, switch the system to manual mode. Spindle, A axis and B axis can be moved. When the nonwovens are finished, everything is ready, and click the button to run automatically. Speed range 0--150m/min.
B. length and fixed length function. The counter-length is installed on a guide cloth stick with a code plate. The high-speed counter is used to realize the function of counting length. The real-time length is displayed on the touch screen. Fixed length, set on the touch screen to cut the length of non-woven fabrics, when the length of the set length, the sound and light alarm to remind the operator.
C. tension control. Actual tension and setting tension touch screen display. The tension control is composed of a tension sensor and a magnetic powder clutch. The tension sensor detects the current tension, compares it with the set tension, and controls the unwinding device by controlling the suction degree of magnetic powder clutch through the deviation, thus realizing the constant tension control. Control tension accuracy: + / - 5N.
D. coil diameter control. The roll diameter control function is realized by angular displacement sensor, and the rolling diameter is 100mm--1200mm.
E. synchronous control. The synchronization of spindle and A axis B is the core of the system, which affects the quality of finished products. The A axis and the B axis are swinging up and down from the cylinder control, or they can be stopped at any position in the middle. The speed of the spindle is set according to the on-site technology, starting with the A and B axles down close to the spindle, at this time the coil diameter is the smallest, the speed is the fastest. With the increase of coil diameter, the torque of A and B axis increases slowly, and the speed is slower and slower. When the spindle is accelerated or decelerated, the speed of A and B axes will increase or decrease correspondingly to keep the spindle synchronized.
F. main technical parameters:
1) supply voltage: 220V/380V, 50/60Hz
2) effective width of cut 18: -1600
3) production speed: 0--150m/min
4) spindle power 5KW; A axis power 5KW; B axis power 5KW.
5 system effectiveness
The main effects are: winding, trimming, and solid. As shown in figures 6 and 7:
6 concluding remarks
The application of billion-dimension PLC in the system of non-woven fabric cutting machine shows the high compatibility with Siemens PLC and the excellent characteristics of stable performance. It can completely replace Siemens products and reduce the production cost of the manufacturer while ensuring the stability of the products.
