Asymmetric control method for deviation rectification and conveying of ZB48 lining paper

Abstract

The invention discloses an asymmetric control method for deviation rectifying and conveying of ZB48 lining paper. The control method comprises the following steps that S1, a deviation rectifying roller pair is installed; s2, when color code detection and machine phase comparison find that the position average value of continuous 10 bags of lining paper is larger than a set phase interval, namely, a deviation rectifying interval is reached, the difference value between the position average value and a set value is calculated and recorded as X mm, meanwhile, the deviation rectifying process of lining paper conveying starts to be slowed down, and a controller drives a servo motor to reduce the rotating speed of a driving deviation rectifying roller pair; s3, when it is found through color code detection and machine phase comparison that the average value of the positions of continuous 10 bags of lining paper is smaller than a set phase interval, namely, a deviation rectifying interval is reached, the difference value between the average value of the positions and a set value is calculated and recorded as Y mm, meanwhile, the deviation rectifying process of conveying of the lining paper starts to be accelerated, and a controller drives a servo motor to increase the rotating speed of a deviation rectifying roller; and S4, when the moving average value gradually rises until the moving average value reaches a set value, the motor gradually recovers the original rotating speed, and the purpose of deviation correction is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fine control of embossing conveying of liner paper of ZB48 equipment, and in particular relates to an asymmetric control method for deviation-correcting conveying of liner paper of ZB48. Background Art

[0002] In recent years, the ZB48 packaging machine has been used more and more widely in the industry, and has gradually become the main model for domestic ultra-high-speed equipment production enterprises.

[0003] The inner lining paper embossing device of ZB48 equipment adopts the form of active roller and passive roller to emboss and convey the two inner lining papers. Figure 1 It is explained that a pair of embossing rollers for inner lining paper are provided in the housing 2 of the inner frame paper embossing assembly, which consists of a fixed roller 3 and a movable roller 5. The purpose is to extrude certain lines on the smooth inner lining paper. The lines are used to facilitate folding and as a requirement for the appearance of the product. In the preparation stage, the airbag 7 is exhausted, and the slider 6 moves to the left under the rebound force of the compression spring 8. The movable roller 5 and the fixed roller 3 are separated, and the user can insert the inner lining paper 1 into the embossing roller pair. During operation, the air supply of the airbag 7 causes the slider 6 to move forward, the compression spring 8 is compressed, and the movable roller 5 and the fixed roller are close to each other and produce a certain pressure. At this time, the fixed roller 3 moves under the gear drive of the equipment, and a pair of fixed gears are provided at the end thereof to connect with the gear at the end of the movable roller. Under the action of the movable gear at the end, the movable roller 5 moves synchronously with the fixed roller 3 in the opposite direction. Since the two squeeze the inner lining paper 1, the inner lining paper can be transported at the linear speed of the fixed roller. The embossed inner lining paper is input into the equipment to complete the subsequent product packaging work. Summary of the invention

[0004] In order to solve the above technical problems existing in the prior art, the present invention provides a ZB48 inner liner paper deviation correction and conveying asymmetric control method. During the inner liner paper conveying process, the inner liner paper is shortened to a certain extent after embossing, so when using patterned inner liner paper, it is necessary to use a servo motor to control the position of the inner liner paper according to the conveying roller speed and running direction of the embossing roller. The present invention can realize the function of precise movement of the inner liner paper pattern before and after embossing, and has the advantages of simple structure and no influence on the original performance of the equipment.

[0005] The technical solution adopted by the present invention is:

[0006] A ZB48 liner paper deviation correction and conveying asymmetric control method, characterized in that the control method comprises the following steps:

[0007] S1. Install the deviation correction roller pair;

[0008] A deflection correction device is installed at the front end of the inner lining paper embossing assembly. The deflection correction device is a pair of deflection correction rollers, and there is pressure between the deflection correction rollers to clamp the inner lining paper. During normal production, the speed signal fed back by the equipment encoder is used, and the deflection correction roller pair is driven by the servo motor to maintain the normal transportation of the inner lining paper. A color mark sensor is installed at the entrance of the deflection correction device, and the interval of the signal fed back by the color mark sensor to the color mark on the inner lining paper is used to determine whether the inner lining paper is in a normal position.

[0009] S2. When the color mark detection and machine phase comparison find that the position average value of 10 consecutive packs of liner paper is greater than the set phase interval, the correction interval is reached. The difference between the position average value and the set value is calculated and recorded as X mm. At the same time, the correction process of slowing down the liner paper conveying begins. The controller drives the servo motor to reduce the speed of the driving correction roller pair and slow down the speed in the next cycle. The specific algorithm is:

[0010] Single pack production speed = πDR (1)

[0011] Actual color mark feedback speed = (πD+X)R (2)

[0012] To make the speeds of the two match, the correction motor needs to be decelerated to R 1 ,

[0013] R 1 =RπD / (πD+X) (3)

[0014] In the actual process, due to the fact that there is a certain deviation and delay between the deceleration effect and the actual situation, K is introduced. 1 To adjust the correction parameters, the final correction speed is:

[0015] R 1 =K 1 RπD / (πD+X) (4)

[0016] Where: D is the diameter of the deviation correction roller, R is the speed of the equipment, R 1 is the speed of the correction roller, K 1 It is the proportional constant for regulation when deceleration is required;

[0017] S3. When the color mark detection and machine phase comparison find that the average position of 10 consecutive packs of liner paper is smaller than the set phase interval, the correction interval is reached. The difference between the position average and the set value is calculated and recorded as Y mm. At the same time, the correction process of the liner paper delivery is accelerated. The controller drives the servo motor to increase the speed of the driving correction roller and increase the speed in the next cycle. The specific algorithm is:

[0018] Single pack production speed = πDR (1)

[0019] Actual color mark feedback speed = (πD-Y)R (4)

[0020] To make the speeds of the two match, the correction motor needs to be accelerated to R 2 ,

[0021] R 2 =RπD / (πD-Y) (5)

[0022] In the actual process, there is a certain deviation and delay between the acceleration effect and the actual situation, so K is introduced 2 To adjust the correction parameters, the final correction speed is:

[0023] R 2 =K 2 RπD / (πD+Y) (6)

[0024] Where: D is the diameter of the deviation correction roller, R is the speed of the equipment, R 2 is the speed of the correction roller, K 2 It is the proportional constant for regulation when acceleration is required.

[0025] S4. When the moving average value gradually increases until it reaches the set value, the motor gradually returns to its original speed to achieve the purpose of deviation correction.

[0026] Furthermore, the color mark detection is triggered by a fixed phase interval. If a signal is detected within this interval, the X and Y data are recorded, otherwise the device stops.

[0027] Specifically, in order to prevent the situation where the color mark is not triggered, the detected contrast phase difference X, Y values ​​will be very large. If this value is used at this time, it will cause control failure. Therefore, the abnormal data is eliminated. If there is no color mark in the fixed phase interval of the continuous production line color mark detection, it is judged that it has exceeded the adjustable range, the equipment stops, and manual intervention begins.

[0028] Furthermore, since the inner lining paper will have a certain deformation after embossing, K 1 K 2 The results were obtained by adopting the method of step-by-step field tests.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The present invention uses a servo motor to control an additional deviation correction roller to control the position of the liner paper according to the conveying roller speed and running direction of the embossing roller, thereby solving the position deviation caused by a certain degree of shortening of the liner paper after embossing, and realizing fixed-length positioning cutting of the liner paper.

[0031] 2. The present invention solves the problem of inconsistent appearance of the box cover after the printed lining paper is wrapped on the ZB48 machine, opens up the production of printed lining paper products on this machine model, and improves the production flexibility of the equipment. The device also has the advantages of simple structure, no impact on the original performance of the equipment, easy installation, low transformation cost, and can be promoted in the entire industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the prior art;

[0033] Among them, 1. lining paper base paper; 2. inner frame paper embossing assembly shell; 3. fixed roller; 4. embossed lining paper; 5. movable roller; 6. slider; 7. airbag; 8. compression spring; 9. moving direction of movable roller; 10. moving direction of fixed roller; 11. moving direction of embossed lining paper;

[0034] Figure 2 It is a schematic diagram of the structure of the present invention after the correction of the correction inner lining paper is added;

[0035] Among them, 17: patterned lining paper with color mark 18: conveying reversing roller 19: deviation correction roller 20: deviation correction device 21: fixed interval color mark on the lining paper 22: color mark detection device;

[0036] Figure 3 It is a schematic diagram of the asymmetric deviation correction process of the present invention;

[0037] Figure 4 It is an accelerated example of the present invention. DETAILED DESCRIPTION

[0038] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0041] refer to Figures 2 to 4In order to adjust the front and rear positions of the inner lining paper, a set of correction rollers 19 are designed and installed at the front end of the inner lining paper embossing assembly. There is a certain pressure between the rollers to clamp the inner lining paper. During normal production, the speed signal fed back by the equipment encoder is used to drive the correction rollers 19 through the servo motor to maintain the normal transportation of the inner lining paper. At the same time, when the inner lining paper enters the correction device 20, a color mark sensor 22 is installed at the entrance. The interval of the signal feedback from the color mark sensor 22 to the color mark 21 on the inner lining paper is used to determine whether the inner lining paper is in a normal position.

[0042] Specifically, the present invention provides a ZB48 liner paper deviation correction and conveying asymmetric control method, the control method comprising the following steps:

[0043] S1. Install the deviation correction roller pair;

[0044] A deflection correction device is installed at the front end of the inner lining paper embossing assembly. The deflection correction device is a pair of deflection correction rollers, and there is pressure between the deflection correction rollers to clamp the inner lining paper. During normal production, the speed signal fed back by the equipment encoder is used, and the deflection correction roller pair is driven by the servo motor to maintain the normal transportation of the inner lining paper. A color mark sensor is installed at the entrance of the deflection correction device, and the interval of the signal fed back by the color mark sensor to the color mark on the inner lining paper is used to determine whether the inner lining paper is in a normal position.

[0045] S2. When the color mark detection and machine phase comparison find that the position average value of 10 consecutive packs of liner paper is greater than the set phase interval, the correction interval is reached. The difference between the position average value and the set value is calculated and recorded as X mm. At the same time, the correction process of slowing down the liner paper conveying begins. The controller drives the servo motor to reduce the speed of the driving correction roller pair and slow down the speed in the next cycle. The specific algorithm is:

[0046] Single pack production speed = πDR (1)

[0047] Actual color mark feedback speed = (πD+X)R (2)

[0048] To make the speeds of the two match, the correction motor needs to be decelerated to R 1 ,

[0049] R 1 =RπD / (πD+X) (3)

[0050] In the actual process, due to the fact that there is a certain deviation and delay between the deceleration effect and the actual situation, K is introduced. 1 To adjust the correction parameters, the final correction speed is:

[0051] R 1 =K 1 RπD / (πD+X) (4)

[0052] Where: D is the diameter of the deviation correction roller, R is the speed of the equipment, R 1 is the speed of the correction roller, K 1 It is the proportional constant for regulation when deceleration is required;

[0053] S3. When the color mark detection and machine phase comparison find that the average position of 10 consecutive packs of liner paper is smaller than the set phase interval, the correction interval is reached. The difference between the position average and the set value is calculated and recorded as Y mm. At the same time, the correction process of the liner paper delivery is accelerated. The controller drives the servo motor to increase the speed of the driving correction roller and increase the speed in the next cycle. The specific algorithm is:

[0054] Single pack production speed = πDR (1)

[0055] Actual color mark feedback speed = (πD-Y)R (4)

[0056] To make the speeds of the two match, the correction motor needs to be accelerated to R 2 ,

[0057] R 2 =RπD / (πD-Y) (5)

[0058] In the actual process, there is a certain deviation and delay between the acceleration effect and the actual situation, so K is introduced 2 To adjust the correction parameters, the final correction speed is:

[0059] R 2 =K 2 RπD / (πD+Y) (6)

[0060] Where: D is the diameter of the deviation correction roller, R is the speed of the equipment, R 2 is the speed of the correction roller, K 2 It is the proportional constant for regulation when acceleration is required.

[0061] S4. When the moving average value gradually increases until it reaches the set value, the motor gradually returns to its original speed to achieve the purpose of deviation correction.

[0062] Color mark detection is triggered in a fixed phase interval. If a signal is detected within this interval, the X and Y data are recorded, otherwise the device stops.

[0063] Specifically, in order to prevent the situation where the color mark is not triggered, the detected contrast phase difference X, Y values ​​will be very large. If this value is used at this time, it will cause control failure. Therefore, the abnormal data is eliminated. If there is no color mark in the fixed phase interval of the continuous production line color mark detection, it is judged that it has exceeded the adjustable range, the equipment stops, and manual intervention begins.

[0064] In the present invention, when the color mark sensor detects that the color mark is not in the required range, the correction system works, driving the correction roller to increase / decelerate under the premise of normal conveying, so as to change the position of the liner paper. Since the correction roller is always in a state of uniform speed operation during normal operation, when the liner paper is faster or slower by the same magnitude, the correction parameters are different, so a set of asymmetric liner paper pattern correction control methods is invented to correct the liner paper under different conditions.

[0065] After embossing, the inner lining paper will have a certain deformation, so K 1 K 2 The results were obtained by adopting the method of step-by-step field tests.

[0066] Specifically, when the pattern is detected to be fast (+), K 1 Used to control the motor deceleration offset, by running 500 bags / minute on site, only opening the fast one-way control, by assigning different K 1 Value, find the appropriate control ratio parameters as shown in the following table:

[0067] When only one direction is opened for correction, the offset of the mark on the sequential cigarette pack

[0068] Similarly, under the condition of running 500 bags / minute on site, only the slow pattern control is turned on, and the appropriate K2 proportional coefficient is found to be 1.3.

[0069]

[0070] like Figure 4 As shown, in the marked box, the moving average value shifts downward. When it is lower than the set value, the motor starts to accelerate. The detection position of the color mark feedback after acceleration changes. The moving average value gradually increases until it reaches the set value. Then the motor gradually returns to its original speed to achieve the purpose of deviation correction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A ZB48 liner paper deviation correction and conveying asymmetric control method, characterized in that: The control method comprises the following steps: S1. Install the deviation correction roller pair; A deflection correction device is installed at the front end of the inner lining paper embossing assembly. The deflection correction device is a set of deflection correction roller pairs. There is pressure between the deflection correction roller pairs to clamp the inner lining paper. A color mark sensor is installed at the entrance of the deflection correction device. The range of the signal feedback from the color mark sensor to the color mark on the inner lining paper is used to determine whether the inner lining paper is in a normal position. S2. When the color mark detection and machine phase comparison find that the position average value of 10 consecutive packs of liner paper is greater than the set phase interval, the correction interval is reached. The difference between the position average value and the set value is calculated and recorded as X mm. At the same time, the correction process of slowing down the liner paper conveying begins. The controller drives the servo motor to reduce the speed of the driving correction roller pair and slow down the speed in the next cycle. The specific algorithm is: Single pack production speed = πDR (1) Actual color mark feedback speed = (πD+X)R (2) To make the speeds of the two match, the correction motor needs to be decelerated to R1. R1=RπD / (πD+X) (3) In the actual process, due to the deviation and delay between the deceleration effect and the actual situation, K1 is introduced to adjust the correction parameters. The final correction speed is: R1=K1RπD / (πD+X) (4) Where: D is the diameter of the correction roller, R is the operating speed of the equipment, R1 is the speed of the correction roller, and K1 is the adjustment proportional constant when deceleration is required; S3. When the color mark detection and machine phase comparison find that the average position of 10 consecutive packs of liner paper is smaller than the set phase interval, the correction interval is reached. The difference between the position average and the set value is calculated and recorded as Y mm. At the same time, the correction process of the liner paper delivery is accelerated. The controller drives the servo motor to increase the speed of the driving correction roller and increase the speed in the next cycle. The specific algorithm is: Single pack production speed = πDR (1) Actual color mark feedback speed = (πD-Y)R (4) To make the speeds of the two match, the correction motor needs to be accelerated to R2. R2=RπD / (πD-Y) (5) In the actual process, there is a certain deviation and delay between the acceleration effect and the actual situation, so K2 is introduced to adjust the correction parameters. The final correction speed is: R2=K2RπD / (πD+Y) (6) Where: D is the diameter of the correction roller, R is the operating speed of the equipment, R2 is the speed of the correction roller, and K2 is the adjustment proportional constant when acceleration is required. S4. When the moving average value gradually increases until it reaches the set value, the motor gradually returns to its original speed to achieve the purpose of deviation correction.

2. A ZB48 liner paper deviation correction and conveying asymmetric control method as claimed in claim 1, characterized in that: Color mark detection is triggered in a fixed phase interval. If a signal is detected within this interval, the X and Y data are recorded, otherwise the device stops.

3. A ZB48 liner paper deviation correction and conveying asymmetric control method as claimed in claim 1, characterized in that: The K 1、 K2 is obtained by using the method of step-by-step field testing.

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