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The application scheme of direct control wire drawing machine system
Straight into the system of drawing machine introduction: straight wiredrawing machine is the continuous production equipment is composed of a plurality of drawing head, step by step drawing, the steel wire, copper wire and other one-time cold drawn to the desired specifications, and finished wire winding, high working efficiency, small occupied area. Through multiple motors at the same time stretching of metal wire, wire wound on the reel in the first few laps, directly into the next drawing die and wound on a reel, not through any intermediate wire guide wheel, therefore the motor synchronization and dynamic response have higher requirements. Through the drawing of each level, the wire diameter of the wire has changed, so the speed of each drawing line also changes. Every moment through the die metal wire flow volume, each drawing head straight wiredrawing machine the working speed is based on this principle, to ensure that all the drawing head line speed proportional synchronous operation.
Schematic diagram of straight wire drawing machine system
A bus communication scheme
Straight wire drawing machine system based on Profibus-DP bus communication
The touch screen control JK3 PLC RS485 series of good communication and control based on JK500 inverter drive motor, by PLC according to the system of the fixed line speed, through the mold compression rate and mechanical transmission ratio calculation speed as constant speed pulley line at all levels, as well as close contact traction feedforward given volume, through the bus communication control system. Stop sending speed given instructions, read the state of each part of the system parameters. And each level of the swing rod feedback to the inverter, the inverter itself PID adjustment, to ensure that the swing rod position unchanged, constant material tension.
- use JK500 drive motor
Support synchronous machine and asynchronous machine closed loop vector control, more rapid response, high control accuracy
- use JK500 drive motor
Support asynchronous machine open loop SVC control, reduce equipment investment
- bus communication program features
Full digital given, no error in synchronization speed, high control accuracy;
No need to configure expensive AD, DA module;
Optimal tension control algorithm;
Independent wire control;
Make full use of its own virtual terminal, saving PLC I/O module;
The utility model can realize the constant line speed winding in the speed mode, and can also realize the torque winding.
System scheme two economic model
The program is well controlled JK3 series PLC RS485 communication and good control touch screen, DA output module. Drive motor using JK500 inverter. Through the Modbus communication to the inverter parameters change, real-time monitoring. The output of the DA module is given to each frequency converter, and the feed rate of the feedforward gain adjustment system is calculated by PLC. PID regulation by the inverter itself
- economic solution characteristics
Strong configurability:
Can be configured directly into the number of straight wire drawing machine, up to 13 (excluding volume);
Can be configured five kinds of point, before and after the combination of switch form, convenient configuration according to need;
Analog synchronization can be used, but also the use of communication synchronization.
It can automatically detect the die wear and optimize the synchronization gain in real time.
No need for PLC equipped with expensive AD modules.
Can show the fluctuation of the tension, to solve the problem of the swing rod can not be seen after the cover is closed.
Display the output frequency and output frequency of the converter, easy to monitor. .
Support fast stop, stop line.
Protection mode when the protective cover is open.
Free roll:
After the roll selection, the system automatically calculates the speed coefficient according to the current machine speed ratio and the die.
Characteristics of frequency converter for JK500 transducer tension control
High performance
Torque control precision, FVC control mode + 5%;
Wide speed range, FVC control mode under 1:1000.
Support four kinds of tension control mode
Closed loop velocity model;
Open loop torque mode;
Closed-loop torque model;
Constant linear velocity model.
Support a variety of calculation methods
Linear velocity method, thickness accumulation method, encoder feedback pulse method, simulation method, open loop vector calculation.
Friction and inertia compensation function
Mechanical inertia, inertia of material, static, dynamic and high-speed friction compensation.
For more information please call the service hotline 0755-28916839, 13640994287, we have a professional customer service staff to respond quickly to your needs.