Design on Electronic control of Silk Spinning production line
Abstract
Silk industry was developed from the full manual production in home to the semi – automatization production in now. But most of the key steps in production are manual operation because of the low degree automation. Therefore, this situation has restricted the productivity and the development of silk enterprises greatly.
This paper aims to design reasonable and efficient electric control for the silk industry to automatically fetching and dropping splint automatically . Electric control design of production line is using the theory of electrical automation to simplify the human labor and improve productivity. The main work and innovation are as follows:
1.Appling variable frequency speed regulation of the motor to completion of the production line to control the conveyor belt`s running speed. Analysis the two cases of the base frequency up and down and using “Sumlink” software to simulate the frequency conversion speed regulation of the motor. The simulation results show the feasibility of the variable frequency speed regulation scheme.
2.The auxiliary clamping device and a key position conveyor require precise speed control. So designing the servo motor speed control scheme based on PLC.
Also designing the closed-loop system composed PID control which can adjust the output value according to the difference between the input value and actual speed.
3.In the design that automatic cotton device in the practical application has problem because of pure mechanical structure. For this designs the control motor positive inversion under the PLC to achieve the Automatic cotton picking
In the end, we also prospected the future development direction.
Keywords: Spun silk spinning; speed control; Electric control design ; PLC control technology; PLC;PID; Servomotor.
