CN-117735311-B - Control system and control method for displaying material film tension in real time through electric-air converter

Abstract

The invention discloses a control system for displaying material film tension in real time through an electro-pneumatic transducer, which comprises an unreeling unit, a reeling unit and a driving roller, wherein a compression roller is arranged above the driving roller, a swinging roller a and a main swinging roller b are arranged on two sides of the driving roller, guide rollers are arranged on two sides of the swinging roller a and the swinging roller b, angle detection sensors are connected to the two sides of the swinging roller a and the two ends of the swinging roller a and the swinging roller b respectively, the angle detection sensors are connected with a PLC through common signals, the PLC is connected with the electro-pneumatic transducer, the electro-pneumatic transducer is connected with a cylinder, and the telescopic end of the cylinder acts on the swinging roller. The control system and the control method for displaying the tension of the material film in real time through the electric-air converter have the characteristics of displaying the tension of the material film in real time and saving cost.

Inventors

• LI BO
• WANG CHAO
• SUN ZHIWEI
• JIAO YU
• Peng anxin

Assignees

• 陕西北人印刷机械有限责任公司

Dates

Publication Date

20260505

Application Date

20231229

Claims (3)

1. 1. The control method for displaying the material film tension in real time through the electric air transformer is characterized in that a control system for displaying the material film tension in real time through the electric air transformer is adopted, the system structure comprises an unreeling unit (1) and a reeling unit (7), a driving roller (4) is arranged between the unreeling unit (1) and the reeling unit (7), a compression roller (5) for ensuring that a material film and the driving roller (4) run at the same speed is arranged above the driving roller (4), a swinging roller a (2) is arranged between the driving roller (4) and the unreeling unit (1), a swinging roller b (6) is arranged between the driving roller (4) and the reeling unit (7), guide rollers (3) for changing the material running direction are arranged on two sides of the swinging roller a (2) and two sides of the swinging roller b (6), angle detection sensors (9) are connected to each other through common signals, the PLC is electrically connected with the electric air transformer, and the electric air transformer is connected with a telescopic air cylinder controller (8) through a telescopic air channel (2) and a telescopic air channel (6); The method is implemented according to the following steps: step 1, an angle detection sensor (9) detects and collects information of an included angle between an axis and an axis when the swinging roller moves and the swinging roller is in a vertical position, and sends the information to a PLC (programmable logic controller), and the PLC calculates angular acceleration of the swinging roller in each three continuous scanning periods; step 2, calculating the thrust of the air cylinder (8) acting on the swing roller according to the air pressure value of the current air cylinder (8); Step 3, calculating an actual tension value of the material film according to the angular acceleration in the step 1 and the thrust value in the step 2, and outputting the actual tension value to a human-computer interface for display through a PLC (programmable logic controller); The step 1 specifically comprises the steps that an angle detection sensor (9) detects and collects an included angle beta between an axis when the swinging roller moves and an axis when the swinging roller is in a vertical position, detection data are transmitted to a PLC (programmable logic controller), every three scanning periods, the PLC records an angle beta 1 、β 2 、β 3 in the three continuous scanning periods and a time interval T 12 、T 23 between the three scanning periods, average angular speeds in corresponding time interval periods are calculated respectively, Average angular velocity ω 23 =(β 3 -β 2 )/T 23 in the period T 12 and average angular velocity ω 12 =(β 2 -β 1 )/T 12 ;T 23 ; And then calculating the angular acceleration alpha of the swinging roller in three scanning periods: α=2×(ω 23 -ω 12 ）/（T 12 +T 23 )(1); The step 3 specifically comprises the steps that the swinging roller rotates around a swinging roller rotating shaft (10), all external forces are balanced with the supporting force F Support of the shaft seat to the whole system, only the residual force is even, and the combined moment M Closing device is calculated: M Closing device =2×F Tension force ×L 3 －F Cylinder ×L 1 ＋G Gravity force ×L 2 ×sinβ(2) Wherein F Cylinder represents the thrust force of the air cylinder (8) on the swinging roller, F Tension force represents the pulling force of the material film on the system, the gravity of the swinging part of the swinging roller a (2) or the swinging roller b (6) represents G Gravity force ;L 1 and represents the force arm of F Cylinder , L 2 represents the force arm of G Gravity force , namely the distance between the gravity center of the whole system and the swinging roller rotating shaft (10), and beta represents the included angle between the swinging roller axis and the swinging roller axis in the vertical state; When the clockwise direction of the couple is positive, and when the telescopic rod of the air cylinder (8) stretches out to half to the middle position, the swinging roller is in a vertical state, beta is 0, beta is positive in the extension state of the air cylinder (8), and beta is negative in the retraction state of the air cylinder (8); under the action of the couple, the swinging roller rotates, and the following formula is adopted: M Closing device =α×J(3) wherein J is the rotational inertia of the swing roller system; And (3) solving the materials in a simultaneous manner according to the formulas (1) and (3), calculating the F Tension force value, and obtaining the actual tension value of the material film, and outputting the actual tension value to a human-computer interface for display through a PLC.
2. 2. The method for controlling the material film tension real-time display through the electric-air converter according to claim 1, wherein the air cylinder (8) is a low-friction air cylinder, one end, close to the angle detection sensor (9), of the swinging roller a (2) and the swinging roller b (6) is embedded with a deep groove ball bearing, and a swinging roller rotating shaft (10) is arranged in the deep groove ball bearing in a penetrating mode.
3. 3. The method for controlling the material film tension displayed in real time through the electro-pneumatic transducer according to claim 1, wherein the step 2 is specifically to check a cylinder sample manual according to the feedback air pressure value of the electro-pneumatic transducer at the current moment to obtain the thrust value of the cylinder (8).

Description

Control system and control method for displaying material film tension in real time through electric-air converter Technical Field The invention belongs to the technical field of roll swinging roller control of roll material equipment, and particularly relates to a control system for displaying material film tension in real time through an electro-pneumatic transducer, and a method for displaying material film tension in real time through the electro-pneumatic transducer. Background The winding and unwinding units of the winding and unwinding equipment generally use swinging rollers to control tension, the tension at the swinging rollers is set through an electric-to-air converter, when the whole machine is in operation, a user can only know the tension set value at the swinging rollers, the specific tension cannot be obtained, the traditional technology is to add a tension sensing roller in a related feeding route to serve as tension display, the feeding route is often complicated, and the price of a tension sensor is high, so that the cost is increased. Disclosure of Invention The invention aims to provide a control system for displaying the tension of a material film in real time through an electric-air converter, which has the characteristics of displaying the tension of the material film in real time and saving cost. The invention further aims at a control method for displaying the tension of the material film in real time through the electric-air converter. The technical scheme includes that the control system for displaying the tension of a material film in real time through an electric air transducer comprises an unreeling unit and a reeling unit, a driving roller is arranged between the unreeling unit and the reeling unit, a compression roller for ensuring the material film and the driving roller to run at the same speed is arranged above the driving roller, a swinging roller a is arranged between the driving roller and the unreeling unit, a swinging roller b is arranged between the driving roller and the reeling unit, guide rollers for changing the feeding direction are arranged on two sides of the swinging roller a and two sides of the swinging roller b, angle detection sensors are connected to the end parts of the swinging roller a and the swinging roller b, a PLC (programmable logic controller) is connected to the two angle detection sensors in a common signal mode, the PLC is electrically connected with the electric air transducer, the electric air transducer is connected with air cylinders through air paths, and the telescopic ends of the two air cylinders are respectively connected with the swinging roller a and the swinging roller b. The invention is also characterized in that: The PLC controller is connected with a human-computer interface through a line. The cylinder is a low-friction cylinder, and one ends of the swing roller a and the swing roller b, which are close to the angle detection sensor, are embedded with deep groove ball bearings, and swing roller rotating shafts are arranged in the deep groove ball bearings in a penetrating mode. The invention adopts another technical scheme that the control method for displaying the tension of the material film in real time through the electric-air converter is implemented by using the control system for displaying the tension of the material film in real time through the electric-air converter, and specifically comprises the following steps of: step 1, an angle detection sensor detects and collects information of an included angle between an axis and an axis when the swinging roller moves and the swinging roller is in a vertical position and sends the information to a PLC (programmable logic controller), and the PLC calculates angular acceleration of the swinging roller in every three continuous scanning periods; Step2, calculating the thrust of the air cylinder on the swing roller according to the air pressure value of the current air cylinder; And step 3, calculating an actual tension value of the material film according to the angular acceleration in the step 1 and the thrust value in the step 2, and outputting the actual tension value to a human-computer interface for display through a PLC (programmable logic controller). The other technical scheme of the invention is characterized in that: The step 1 is specifically that an angle detection sensor 9 detects and collects an included angle beta between an axis when the swinging roller moves and an axis when the swinging roller is in a vertical position, detection data are transmitted to a PLC (programmable logic controller), the PLC records angles beta 1、β2、β3 in three continuous scanning periods and time intervals T 12、T23 between the three scanning periods, average angular speeds in corresponding time interval periods are calculated respectively, Average angular velocity ω 23=(β3-β2)/T23 in the period T 12 and average angular velocity ω 12=(β2-β1)/T12;T23; And then calculating the angul