The photoelectric sensor adopts Omron to say that it is difficult to reflect light (3). The emitted infrared light = 081 light source 4 receiver is made in + interface. This type of device should be placed in the strip to avoid contamination such as rolling oil. The two photoelectric pairs are respectively symmetrically placed on the sides of the rolling center line. The distance is determined by the width of the strip and the strip. The signal is passed to the amplifier. It is sent to the servo valve, and the servo valve acts to drive the movement of the unwinder. Hydraulic system 4. Qiao control valve model is 08404046 position servo valve. Because the linear median stops and stays unstable. So 4 uses a 40-non-linear valve that adds a voltage and a flow to the 08 amplifier. In order to drive the servo, the regulating valve is to adjust the flow to push the movement speed of the base. The valve is adjusted to adjust the stomach to the right weeping force to make the servo valve. The nonlinearity is adjusted by the manufacturer. 60 can be selected according to the actual situation, using Siemens 7300 system, using the 732 lfl 4 automatic in the hydraulic system transformation 6! Automatic right photoelectric to the right shift hand shift left moved the age of Li, forgive & 4 å–” 6 6 æ¤ ä¹ ä¹ ä¹ ä¹ , 镨 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Where, the position of the nut on the beam is about 180, the stress is about compressive stress; on the 40 arc, according to the above finite element analysis results, it can be known that the maximum principal stress occurs in the 40 arc, and its specific position can be Determined by 9 and 10. 9 is the beam from the center to the front 3, to, 1 stress distribution, the stress occurs from the center to the right 4951 from the center forward two. 3 Conclusion According to the above results, it can be seen that the maximum stress of the beam occurs at the position of the orifice pressure nut. Although the allowable stress is exceeded, the stress property is compressive stress and is not much exceeded. According to the Saint-Villeland principle, the stress on the product is used. The effect is not large; and 40 arc parts are the maximum tensile stress occurrence position, the specific position is from the center to the right 495, such as 1 from the center to the front 2 coffee, where the 1 stress pit is 95 less than the stress used; The stress values ​​are less than the allowable stress, so the beam is designed to meet the job requirements.
2 æ¿® good. Mechanical Design. Beijing Higher Education Press. 1996 3 Liu Hongwen. Material mechanics. Beijing Higher Education Press. 1985 4 Li Runfang. Wang Jianjun. Structure analysis program 3 person principle and application. Chongqing receives the signal input from the optoelectronic pair, and uses the 6157 3323100 analog 0 analog output board as the output. Since the output current of the die board is only 20, it is recognized, so the output stage is added with an amplifying circuit to Guarantee the drive of the servo valve, the trapezoidal part of the center part.
3 Application example On the rolling line between the uncoiler and the rolling mill frame, the centering frame is installed, and the screw with the root pitch is used on the frame. The center position of the screw is on the dairy center line, and the screw is mounted on the screw. 2 photoelectric pairs, before rolling, according to the width of the strip, the position of the two photoelectric pairs on the screw is adjusted, so that the two photoelectric pairs are simultaneously moved or close together on both sides of the rolling center line, due to The infrared beam with a diameter of 1 is emitted from the light source, and the distance between the two photoelectric pairs is slightly larger than the bandwidth, so that the beam is emitted outside the two edges of the strip without obstruction, so there is no reflection on the strip, no signal is received, and no signal is output. The amplifier has no output, the servo valve does not work, and the unwinding machine base does not move. If the pressure difference or tension deviation causes the strip to deviate from the rolling center line during the milking process, the centering frame is moving. The beam of the 屯 屯 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 就有 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分 部分Drive the servo valve, the servo valve opens according to the curve Drive the cylinder to push the unwinding machine base, so that the belt returns to the dairy center line; when the strip is biased to the other side, the signal from the other side is output to the river, and then the reverse voltage is output by the amplifier. The valve drives the cylinder from the other direction to push the unwinding base back from the other direction so that the strip still moves in the rolling center line. Because the beam is narrow, it is controlled by digital quantity, so the precision is high, and the effect is better than 0. The buckle centering is the light source on the top, received below, and the light flux change is used to find the relative amount. Due to the easy contamination and resolution of the lens surface, the error and boundary + stability phenomenon are large. And the effect on the effect. With digital control, there are only two states of signal and no signal and analog amplification, so that the electro-hydraulic servo valve can be driven without causing excessive conditions.
4 Conclusions The bilateral photoelectric centering device driven by the nonlinear servo valve is improved in accuracy, reliability and sensitivity due to the use of numerical control technology and process control. Due to the use of reflected light sensing, the system device is prevented from being under the strip. It is polluted by rolling oil, which improves the precision and prolongs the service life. The device is developed in the case of a small amount of money, but it has a good effect. Because there are systems in the milk machine with the same precision requirements, Several inputs of the system can be used to transfer the mountain. Do not have to buy 4 eve 1 = receiving time 2001
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