Expertise and industry situation analysis of coil web guide system

The web guiding system is a fully automatic intelligent control system consisting of sensors, controllers and actuators. It is mainly used for coil control in various industries to ensure that the deviation of the coil is within the controllable range, ensuring quality, reducing waste and improving efficiency. .
Classification and common sense of web guide system
1. Correction is divided into: electromechanical guiding, gas-liquid guiding, electro-hydraulic guiding, etc.;

(1) Electromechanical: It is the mainstream of the current application. It is characterized by high precision of guide, compact structure, simple installation and debugging, low energy consumption and environmental protection.

(2) Gas-liquid type: It is a relatively early product. The main feature is that the thrust is large, but it has been constantly shaking during the use process, which has great damage to the machine and materials. It is easy to leak oil and has high energy consumption. Factors such as large size have been eliminated by the market;

(3) Electro-hydraulics: web guide is characterized by electromechanical control and hydraulic pushing, which solves the problem of gas-liquid oil leakage and sensor identification limitations, but the response is still slow, high energy consumption, large volume and other factors do not get a wide range. application;


2. Knowledge of electromechanical correction:

(1) Guide sensor: It is divided into ultrasonic, infrared, photoelectric, CCD and other types, each with advantages and disadvantages;

A. Ultrasonic is applicable to all materials except mesh materials; however, the response time and accuracy are slightly worse;

B. The performance of infrared and photoelectric is similar. It is suitable for all materials except transparent materials, and the correction time and accuracy are high.

C, CCD sensor is mainly for the recognition of color difference, especially the printing line and other marking lines, the recognition range is wide, especially the liquid crystal display is more intuitive, high precision and fast response;

(2) Actuator: It is divided into AC synchronous motor, DC brush motor, stepping motor, DC brushless motor, servo motor, etc. The control methods of different types of motors are also different;

A. AC synchronous rectification is a kind of rectification with more application. Its technical content is not high, the correction accuracy and the response speed are not high. Therefore, it is mainly used in occasions where the accuracy of rectification accuracy is not high and the cost is extremely high.

B. The main characteristic of DC brush motor is that it is easy to control, and the precision is higher than that of synchronous motor. However, there are loss parts such as carbon brushes, which will often fail after a long time;

C. The characteristics of stepping motor are: wide application range and large market holding capacity. Therefore, the control technology is relatively mature and the cost is low. However, the shortcoming is that its response is poor, there is a certain acceleration time, the noise is large, and the load capacity is also Insufficient, relatively few applications in the field of rectification;

D, DC brushless motor features: Simply put, the servo motor removes the encoder, solves the problem that the DC brush motor has carbon brush wearing parts, and also solves the problem of noise and acceleration of the stepping motor. The product between the stepper motor and the servo motor.


3. If the signal type is divided: there are switching guide, analog guide, digital communication web guide;

A. From the performance point of view, the digital communication class is the best, the analog quantity is second, and the switch quantity is poor;

B. From the simple point of view of operation: the switch quantity is the simplest, the digital communication class is second, and the analog quantity is poor;

C. From the perspective of stability: the stability of the three types depends on whether the design is reasonable, whether the technology is mature, whether the materials are good or not, and there is no essential difference;

D. From the perspective of cost: digital communication is the most expensive, analog is second, and the switch is the cheapest.


Why is the import correction mainly DC brushed and the domestic correction is mainly DC brushless?

This is mainly due to the early development of the foreign motor industry, mature technology, and good durability. The failure rate is relatively low in the correction application, and our domestic DC brush motor failure rate is very high, leading everyone to explore new technologies. The solution, therefore, has been developed in the direction of brushlessness. After nearly ten years of application, it has been very mature, completely solving the problem of high motor failure rate in the past. In this respect, domestically produced brands have surpassed imported brands; (people often encounter problems Only to find a solution to the problem, the problem is the opportunity)

Application form of web guide system
1, unwinding class guide

2, winding type guide

3. Deviation guide during travel

The initial stage of industry development
The web guide system mainly exists as one of the important accessories of various coil equipment. The most demanding application in our country is the printing and packaging industry. In the era of planned economy, it basically relies on imports. After China's reform and opening up, it entered the era of market economy, and people lived on life. The diversified demand has led to a diversification of the packaging of the products, which has higher requirements for printing and packaging, and the printing and packaging industry has thus begun to develop rapidly. The demand for web guide systems in the industry has also increased rapidly, but it is mainly based on imported brands. There are fewer manufacturers in China to guide the rectification, and it is mainly based on the comparison of low-end products, but the quality and performance are not relevant;

The current stage of industry development
After nearly 20 years of development, domestic correction has achieved a qualitative leap, and there are many manufacturers, but there are really no R&D capabilities, but there are not many independent property rights; foreign brands mainly focus on occupying high-end markets, of which the low-end market is basically Domestic brands have been replaced, and domestic corrections and import guide are basically the same in the application of the heel. Even the domestic web guide is applied in the motor, and the operation is better than the foreign brands. Most of the follow-up applications are mainly imported brands, but recently In the year, domestic CCD-based products have been successfully developed, and will enter a comprehensive maturity period in the next two years, which will gradually replace imported brands as the replacement of the border market;

Future prospects for industry development
In the future, there will be profound changes in the field of rectification. Domestic brands will replace imported brands with local service advantages, product advantages, cost advantages, etc., and will go global with the domestic equipment manufacturing industry; the industry will form 3-5 more influential The first brand group of Lili will survive on a smaller scale in the market segment;

Web Guiding system technology will also have great development, and it will develop towards more humanized, intelligent and material-oriented. We look forward to the independent brand web guiding system going global, leading the mainstream and welcoming respect!