In automation in the application of automatic high-speed shear folding machine

Pick to: based on the analysis of shear folding machine, on the basis of embedded control system is put forward based on the table of mechanical and electrical automation platform automatic folding machine solution. Given frequency converter main drive motor revolutions; PLC controller driving a stepper motor pulse frequency; Stepper motor speed governing such important control technology design. Keywords: trademark 1 introduction shear folding machine is fully automatic PLC trademark machining equipment clothing, footwear and other industries. Shear folding machine to cut and fold belt trademark hot forming, first by cutting knife to cold cut or eager of trademark, and then through the mould complete trademark for a variety of shapes on shear folding very hot, can realize to the trademark slice, among both pack, folded in half, fold, etc. , to realize ribbon trademark processing. Automatic folding machine appearance is shown in figure 1. Mold and various way to fold as shown in figure 2. Traditional shear folding machine is the meter is given priority to, use the special embedded system such as single machine control and trademark length by mechanical adjustment. In order to market demand and its own development requirements, the application of PLC controller and frequency converter and touch screen such as general electric automation platform technology to develop fully automated shear folding machine, is the urgent demand of the folding machine equipment manufacturer. Figure 1 automatic folding machine appearance tutu 2 molds and all kinds of way to fold system design 2. A systematic analysis of the folding machine is driven by a motor make the conveying mechanism feed CAM mechanism, the mold movement back and forth and up and down movement of the blade and a trip to complete feed, cut and fold the hot action, such as motor speed, hand automatic start-stop control, state detection and fault diagnosis is controlled by MCU, every time before processing of the different lengths of the trademark, need to manually adjust the rotary table, thus set up the required length size, users should be electrical accessories procurement exist problems, poor control panel electric protection, maintenance difficulties shortcomings, hope to be able to improve the performance of the machine by electric transformation and using convenience. 2. 2 sets of automation platform design according to the characteristics of the machine and user needs, the project design platform based on the platform of automatic system. Choose in SC series PLC to replace the control board as a control, frequency converter for motor control, 3. 8 inch touch screen instead of panel button; Counter, fixed-length feeding is controlled by step motor. ( 1) PLC controller parts: choose up to 12 sc11t hosts, as shown in figure 3. Figure 3 SC host appearance figure is the host in the S series in favour of a motion control, very suitable for need high speed control positioning occasions, such as servo position control, numerical control processing, etc. , the machine configuration points is more compact, easily through its powerful extensions can realize more points, plus 16 sp in this project, DI 8 points, DO8) Used as I / 0 extension. ( 2) Inverter parts: choose a type 015 m21a M series inverter, as shown in figure 4. Figure 4 sets of M series inverter features: · 0 output frequency. 1 ~ 400 hz, can be set V/F and vector control, carrier frequency can reach 15 KHZ, support the MODBUS communication, embedded PID feedback function, zero velocity moment keep function M series in inverter family of miniature high functional, wide application, this project mainly USES the frequency conversion and function of communication, through the MODBUS communication can easily realize the upper machine for inverter parameter setting and reading, so as to realize the accurate real-time monitoring of the machine speed. （ 3) The man-machine interface: choose up to 3. 8 inches AS3. 8 BSTD type touch screen, as shown in figure 5. Figure 5 in the AS touch screen features: · 8 gray blue and white the STN, 256 color resolution: 320 * 240 pixels, support RS232 / RS422 / RS485 communication, support USB storage, mouse, printed in the man-machine can easily control and monitoring, the original button and counter function can be realized through the picture, make a control box panel more concise, improve the level of the product, to adapt to the market demand. 3 3 control system design. 1 main drive motor host asked cut rate of 0 ~ 150 / cent, feed length control in 0. 2 mm accuracy and working range in 40 mm - length 240mm。 Motor reduction ratio design for 1:10, cut/if you want to reach 200 points, when the motor speed: n = 150 * 10 = 1500 r/min, required output frequency is: f = n, p / 60 = 1500, 2/60 = 50 hz, meet the speed requirement. 3. 2 feed stepper motor feed length controlled by step motor, control accuracy is 0. 2 mm, 115 mm, feed roller circumference reduction ratio 1:2, set the stepper drive fine points of each corresponding to one revolution of the pulse number is 600, feed roller per turn 1 coil actuator to turn 2 laps, each pulse corresponds to the feeding length is: L = 115/2 * 600 = 0. 096mm
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