浅析凹印机张力控制的方法（Analysis of tension control method for gravure press）.docVIP

浅析凹印机张力控制的方法（Analysis of tension control method for gravure press） Analysis of tension control method for gravure press 8-2 Tension control refers to the ability to permanently control the tension of a belt when it is delivered on a device. This control must be valid for any running speed of the machine, including acceleration, deceleration, and uniform speed of the machine. Even in the case of emergency parking, it also has the ability to ensure that the belt does not produce any damage. Gravure press tension control basically break up dynamic tension control, open-loop, semi-automatic tension control and closed-loop automatic tension control of three categories. Manual tension control is in the process of winding or unwinding, when the diameter changes to a certain stage, the manual power supply is adjusted by the operator, so as to achieve the purpose of controlling tension. However, modern gravure press manual tension control system has been basically eliminated, but only as a closed loop automatic tension control system in an operation mode exists. Open loop type semi-automatic tension control and roll diameter detection type tension control, it is installed in the place with a scroll, proximity switch to detect the speed of the scroll, and through the initial reel diameter set value and the thickness of the material, the cumulative calculation of winding or put the drum diameter, the corresponding volume output control signal change the size, in order to control the winding or unwinding torque braking torque, so as to adjust the belt tension. Because each reel rotates, the diameter of the reel will change 2 times as much as the thickness of the material. This tension control without outside stimulation, can carry out stable tension control. However, due to the torque changes, linear changes and mechanical losses, the absolute accuracy of the tension control is poor. The closed-loop type automatic tension control by tension sensor for direct determination of th