At present, the utilization rate of domestic spinning machines in domestic enterprises has accounted for about 90%, and the performance indicators such as output, reliability and stability of the products have been greatly improved. The spinning frame is equipped with a large package for forward spinning, shortening the process flow, spinning less machine, multi-spinning, and the development of automation and continuous production. The technology is integrated with machine, electricity, gas and instrument, digital, intelligent The development of information technology and the application of modern advanced technologies such as online monitoring and information acquisition analysis to the modular design of components, devices and functions on the mechanical structure will be the development trend of the spinning frame.
First, the process introduction and control principle1. Open the cotton:
2. Carding:
3. Articles and volumes:
4. Combing:
5. Side by side:
6. roving;
7. Spun yarn:
8. Winding;
9 and the line:
10. Multiple times:
The spinning frame is a new type of spinning machine that is widely used. It has excellent performance, convenient operation and high degree of mechatronics. It is combined with CO-TRUST CPU and text design: spinning parameter setting, display, automatic control of spinning process, fixed length Yarn, spindle speed curve control and other functions. The spindle speed, the length of the yarn, the twist of the spinning process can be calculated and automatically displayed according to the set conditions, and automatically controlled according to the sensors of the various parts of the machine, especially the fixed length doffing and automatic doffing, which greatly reduces the operator. Labor intensity; spindle curve control improves the quality of the yarn and ensures the formation of the spindle, which increases the output of the whole machine.
Second, control technology programThe electric control system of the spinning frame needs to have the functions of automatic driving, automatic lowering of the program board, automatic tracking drive after midway stop, automatic doffing, automatic head retention, etc., and the process parameters such as the length of the tube yarn can be realized. Fixed length doffing and spindle speed curve control and shift production accumulation. The electrical control system includes: transmission part, data detection part, inverter spindle speed curve control, programmable controller part, TD2X unit and digital communication part.
1. System hardware
1). Transmission part
Including main motor, suction motor, program board lifting motor, automatic lubrication device, frequency converter, doffing power supply, various switches, etc.
2). Data detection part
The function is to automatically detect the running data of the spindle and the front and rear rollers during the spinning process, and to provide calculations for the calculation of the production schedule, the spindle speed, the drafting ratio, the twisting degree, and the control of the spindle speed curve.
3). Automatic detection part
Its function is to automatically stop the parking when the doffing starts, and automatically keep the head, creating conditions for re-driving to reduce the break.
4). Inverter spindle speed control
Its function is that the inverter automatically adjusts the spindle operation according to the spindle speed control curve transmitted by the PLC to improve the yarn quality and output.
5). Programmable controller part
This part is composed of CPU226L main unit and extended switch signal module; completes the whole machine switch input, data detection and calculation and process control, realizes the spinning process automation and monitors the machine operation.
6).TD200 parameter setting display unit
This part is communicated by the PPI protocol between the CPU226L main unit and the CO-TRUST series TD2X. The process parameter display setting of the spinning process is completed, and the operating speed of the spindle can be directly set to realize the control flexibility.
Third, control points The software design of the electric control system of the spinning frame is mainly divided into: control part, parameter setting display part, calculation sampling part, digital communication part and spindle running curve part.
Control part
For the main program part of the software, the spinning process is automatically controlled mainly based on the system switching amount and the input of the sensor.
2. Parameter setting display section
Mainly based on TD2X configuration to complete the parameter setting display menu, the total design menu is: complete production, shift production cumulative display, shift setting, spindle speed, front roller speed, twist, yarn length statistics and other parameters display, as well as some parameter settings The screen can complete the parameter setting, error setting or error alarm prompting function, and edit the system key 5 groups in total.
3. Calculate the sampling part
Mainly based on the spindle, front roller, rear roller data detection sensor sampling results and design parameters to complete the system calculation, to complete various types of display parameter calculation and fixed length doffing function.
Fourth, summary The predecessor of the spinning frame control system is composed of PLC switch quantity control and external parameter meter. The whole machine has low control precision, poor reliability and anti-interference performance, and high system cost. After adopting CO-TRUST CTSC-200 series PLC to form the control system The whole machine control adopts the digital communication mode, which is convenient for programming and convenient communication, control precision and reliability, and excellent anti-interference performance. The principle of “improving the software design level to reduce hardware investment†greatly reduces the system cost. The company has greatly improved the profitability of its products and has been well received by users. The market prospect is very broad.
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