Chen Jinbing, Lin Jiale, Zhao Xing. Ninglang New Beijing Institute of Technology Automatic Control Department, Beijing 18 Advantages Introduction With the wide application of automation technology, the material transfer is required to be more accurate and more efficient. Flat belt flat belts are traditionally effective. The continuously moving endless material, the conveyor type, and the conveyor belt are both the member carrying the cargo and the member for transmitting the traction. The belt is driven smoothly by the friction between the conveyor belt itself and the drum, and it can be used for the transportation of various materials. A song that is transported in a flat belt requires technical deviation. There are two kinds of dynamic corrections for solving the deviation. The usual method of correcting deviation adopts passive correction, and the correction effect is difficult to guarantee, which affects the application of the flat belt transmission in the high-speed precision object shake transmission device. The dynamic correction has several corrective effects and high reliability. Now it has developed rapidly. The active correcting actuator can be electromagnetically hydraulic or pneumatic. The rapid development of the pneumatic technology of the factory. Pneumatic systems are widely used because of their low cost, simple structure and simple control. Here, a flat belt conveying correction method driven by air pressure is introduced.
1 The reason for the flat belt deviation is that the flat belt conveyor 1 is small, and the conveyor belt bypasses the driving roller and the tension roller. And choose to roll according to the needs of the work. The mountain motor drives the rolling to drive the conveyor belt, and the belt belt is often faulty. There are many reasons for the deviation of the conveyor belt. The cutting and the connection of the conveyor belt are +1. The material of the conveyor belt is made to adhere to the center line of the conveyor + the drum surface of the conveyor, or the inside of the conveyor belt is stuck with foreign matter. The actual diameter of the drum has changed irregularly.
The inflexible rotation of some of the rollers causes the resistance on both sides of the conveyor belt to be unequal.
The material on the conveyor belt is improperly loaded, the material is too concentrated on the side of the conveyor belt, or lateral force may be generated in the actual work due to the design of the plow-type discharger.
When the conveyor belt runs out during the running process, if it is not corrected in time, the edge of the conveyor belt may rub against the frame, causing it to be worn or torn, causing the material on the conveyor belt to spill, so how to The timely and successful rectification of the conveyor belt is an important question in the field of belt conveyor research.
2 Principle of pneumatic rectification Principle of pneumatic rectification method 2. The drum of the conveyor belt is supported by cylinder 1 and cylinder 2, and a photoelectric switch is arranged at the corresponding position of the conveyor belt. Such as the cabinet 2; 1 small 2, 3.14 = photoelectric switch is to detect the position of the conveyor belt. When the conveyor belt is in the normal position, all of the photoelectric switches have no output and the cylinders 12 are in a retracted state. When the conveyor belt is deflected to the right, the photoelectric switch 3 outputs a signal to control the extension of the cylinder 1. If the cabinet 21 is small, the drum is tilted to the left by a fixed angle, so that the flat belt is corrected to the left and returned to the normal position. Similarly, when the conveyor belt is deflected to the left, the photoelectric switch 4 outputs a signal, and the cylinder 2 Extending, 2, the flat belt is subjected to a tensioning force to the right, and the flat belt moves to the right under the action of this component to correct the flat belt back to the normal position.
In particular, when the correction system can not correct the belt to the normal position and the belt continues to shift to the side, there are mainly the following aspects: 1 drum installation is not correct, that is, the axis of the drum and the belt conveyor The position at which the photoelectric switch is installed is determined by the allowable value of the belt deviation.
The cylinder is determined by the roll; 1 is corrected, and the angle of the drum is determined, which is related to the width of the belt.
3 Pneumatic system principle Correction system's pneumatic system principle Ge Rue 3. Cylinder 1 2 is respectively screwed by two two-way solenoid valves, and the cylinder's contradictory mountain one-way throttle valve is adjusted. The use of the outlet throttling mode to adjust the cylinder speed can effectively avoid the sudden change of the flat belt tensioning force when the cylinder is rapidly extended or retracted, and the belt drive should be twisted or slipped.
The differential hanging wheel obtained by the control process is =801=63, 1=30=90, which satisfies the above-mentioned various conditions. 2 Conclusion 86.0 is an object-oriented programming language. The program developed by it is friendly and easy to operate. Easy to maintain. The program has performed well after many experiments, and the most remarkable feature of the program is that it can give a variety of options, so that the best results can be selected according to the conditions of use. Not only ensured the processing quality, but also achieved good results in experimental teaching.
1 Gong Pei has. 886.0 programming tutorial. Higher Education Press.
2 Jia Yanlin. Metal cutting machine tools. Harbin Institute of Technology Press, 20003 Wode Studio. He developed and applied skills with 5.0. 1998. lecturer. The direction of the mortar is fluid drive and control.
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