Sixteenmo folding adjusting device and adjusting method of roll paper folding machine

Abstract

The sixteenmo folding adjusting device of the roll paper folding machine comprises a servo motor, the servo motor is connected with a phase supporting shaft, the phase supporting shaft is connected with a double-rigid-wheel differential harmonic reducer, and the double-rigid-wheel differential harmonic reducer is connected with a phase input gear and a phase output gear. The phase output gear is meshed with an intermediate gear, the intermediate gear is connected with a power transmission shaft, the power transmission shaft is connected with a bevel gear II, the bevel gear II is meshed with a bevel gear I, the bevel gear I is connected with a crankshaft, the crankshaft is connected with a connecting rod, the connecting rod is connected with a swing arm, the swing arm is connected with a chopper arm, and a chopper is arranged on the chopper arm. The invention further discloses a sixteenmo folding adjustment method of the roll paper folding machine, data are collected through the sensor and transmitted to the PLC, the phase adjustment amount needed by the chopper is calculated, an instruction is sent to the servo motor, and therefore the phase adjustment of the chopper is achieved. By optimizing a power source and a transmission structure, high efficiency, stability and accuracy of power transmission are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of printing equipment, and in particular relates to a sixteen-page folding adjustment device for a roll paper folding machine, and also relates to a sixteen-page folding adjustment method for a roll paper folding machine. Background Art

[0002] With the continuous upgrading of the printing industry and the increasingly fierce market competition, the requirements for folding accuracy and production efficiency have reached unprecedented heights. Traditional folding technology has exposed many difficult problems in dealing with complex and changing production environments and high quality standards, and innovative solutions are urgently needed to achieve breakthroughs.

[0003] At present, the way to adjust the chopping action of the 16-fold folding chopper of the web-fed folding machine is mainly divided into the following stages. In the initial debugging of the machine, the interaction between the chopper and the paper is directly observed by the human eye. This method is limited by the physiological characteristics of the human eye and it is difficult to accurately capture subtle movement deviations. Long-term observation is prone to visual fatigue, thereby increasing the probability of misjudgment, making it difficult to ensure the accuracy of the initial debugging. During the operation of the machine, the action moment is captured with the help of a high-speed camera. However, the subsequent analysis of the image data involves a large amount of data, and the processing process is extremely complicated. Another method is to adjust the chopping action based on the actual folding effect of the output, and make improvements after discovering problems such as page number confusion, uneven paper folding or damage in the folding. However, during this period, a large number of unqualified products have been produced, resulting in serious waste of raw materials. At the same time, the production process is frequently interrupted for adjustment, which greatly reduces the overall operating efficiency of the equipment.

[0004] In addition, the paper relies on belt transmission in the 16-page folding. In actual production, the speed of the belt will change due to various factors such as motor performance fluctuations, load changes, belt aging and uneven tension. When the belt speed changes, there will be a relative displacement between the paper and the belt. If the chopper phase cannot be adjusted in time to match the real-time speed of the paper, the folding position will be inaccurate, resulting in a large amount of folding waste and increased production costs. Summary of the invention

[0005] The purpose of the present invention is to provide a sixteen-fold folding adjustment device for a roll paper folding machine, which improves the accuracy of the chopper phase adjustment.

[0006] Another object of the present invention is to provide a method for adjusting the sixteen-page folding of a web paper folding machine.

[0007] The technical solution adopted by the present invention is that the sixteen-page folding adjustment device of the roll paper folding machine includes a servo motor, the output shaft of the servo motor is connected to the phase support shaft, the phase support shaft is connected to the double rigid wheel differential harmonic reducer, the double rigid wheel differential harmonic reducer is respectively connected to the phase input gear and the phase output gear; the phase output gear is meshed with an intermediate gear, the intermediate gear is connected to the power transmission shaft, the power transmission shaft is connected to the bevel gear II, the bevel gear II is meshed with the bevel gear I, the bevel gear I is connected to the crank shaft, the crank shaft is connected to the connecting rod, the connecting rod is connected to the swing arm, the swing arm swings back and forth around the swing arm support shaft, the swing arm is connected to the chopper arm, and the chopper arm is provided with a chopper.

[0008] The present invention is also characterized in that:

[0009] It also includes a 16-page table top, on which a belt shaft a and a belt shaft b are arranged, and the belt shaft a and the belt shaft b are connected by a transmission belt; the 16-page table top is also provided with a paper stopper.

[0010] An inclination sensor is arranged on the swing arm; a piezoelectric pressure sensor is arranged in the middle of the paper stopper; a laser displacement sensor is installed on the sixteen-opening table, and the laser displacement sensor is close to the paper stopper.

[0011] The inclination sensor, the laser displacement sensor and the piezoelectric pressure sensor are all connected to the PLC controller; the PLC controller is also connected to the servo motor.

[0012] A belt gear is also included, the belt gear meshing with the phase input gear.

[0013] The phase support shaft is connected to the double rigid wheel differential harmonic reducer through a key.

[0014] The rigid wheel D in the double rigid wheel differential harmonic reducer is connected to the phase input gear through screws, and the rigid wheel S in the double rigid wheel differential harmonic reducer is connected to the phase output gear through screws.

[0015] Another technical solution adopted by the present invention is a method for adjusting the 16-fold folding of a web-paper folding machine, which is specifically as follows:

[0016] After the servo motor is started, its output shaft drives the support shaft to rotate, which in turn drives the double rigid wheel harmonic reducer to rotate. The phase input gear and phase output gear connected to it will also undergo differential motion, that is, there will be a phase difference between the two, thereby realizing the 16-page phase adjustment of the folder; the laser displacement sensor can accurately monitor the position changes of the paper on the table in real time; the piezoelectric pressure sensor can sense whether the paper has reached the paper stop block; the inclination sensor can monitor the movement posture of the chopping knife; the collected data will be transmitted to the PLC controller, which will calculate the phase adjustment amount required for the chopper and send control instructions to the servo motor to achieve the phase adjustment of the chopper.

[0017] The beneficial effects of the present invention are:

[0018] (1) The sixteen-fold folding adjustment device of the web paper folding machine of the present invention ensures the high efficiency, stability and accuracy of power transmission by optimizing the power source and transmission structure; at the same time, it simplifies the mechanism design, reduces the size and weight of the equipment, improves the convenience of installation and maintenance, reduces production costs and equipment failure rate, and meets the urgent needs of the modern printing industry for high-quality printed products and efficient production.

[0019] (2) The 16-page folding adjustment device of the roll paper folding machine of the present invention is equipped with a sensor to automatically, accurately and efficiently adjust the chopper phase according to the real-time status of the paper (including position, quality, etc.) and the dynamic changes of the belt speed, thereby significantly improving the folding quality, greatly reducing the waste of folding and pasting, reducing the dependence on the workers' operating experience, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a sixteen-fold folding adjustment device of a roll paper folding machine of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a sixteen-page table in a sixteen-page folding adjustment device of a web paper folding machine of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a paper stop block in a sixteen-fold folding adjustment device of a roll paper folding machine of the present invention;

[0023] Figure 4 It is a flow chart of adjusting the position and movement state of paper in the 16-page folding adjustment method of the web paper folding machine of the present invention;

[0024] Figure 5 The present invention is a flow chart of paper quality adjustment in the sixteen-page folding adjustment method of a roll paper folding machine.

[0025] In the figure, 1. belt gear, 2. phase input gear, 3. double rigid wheel differential harmonic reducer, 4. servo motor, 5. phase support shaft, 6. phase output gear, 7. intermediate gear, 8. inclination sensor, 9. swing arm support shaft, 10. swing arm, 11. chopper arm, 12. connecting rod, 13. crank shaft, 14. bevel gear I, 15. bevel gear II, 16. power transmission shaft, 17. belt shaft a, 18. sixteen-opening table, 19. laser displacement sensor, 20. paper stopper, 21. transmission belt, 22. belt shaft b, 23. piezoelectric pressure sensor. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] The invention discloses a 16-fold folding adjustment device for a roll paper folding machine, Figure 1 As shown, it includes a servo motor 4, the output shaft of the servo motor 4 is connected to the phase support shaft 5 through a coupling, the phase support shaft 5 is connected to the double rigid wheel differential harmonic reducer 3 through a key, the rigid wheel D in the double rigid wheel differential harmonic reducer 3 is connected to the phase input gear 2 through screws, and the rigid wheel S of the double rigid wheel differential harmonic reducer 3 is connected to the phase output gear 6 through screws; the phase output gear 6 is meshed with an intermediate gear 7, the intermediate gear 7 is connected to a power transmission shaft 16, the end of the power transmission shaft 16 is connected to a bevel gear II 15, the bevel gear II 15 is meshed with a bevel gear I 14, the bevel gear I 14 is connected to a crankshaft 13, the crankshaft 13 is connected to a connecting rod 12, the connecting rod 12 is connected to a swing arm 10, the swing arm 10 swings back and forth around the swing arm support shaft 9, and an inclination sensor 8 is arranged on the swing arm 10; it also includes a belt gear 1, the belt gear 1 is meshed with the phase input gear 2; the swing arm 10 is connected to a chopper arm 11, and a chopper is arranged on the chopper arm 11;

[0029] Example 2

[0030] Further, if Figure 2 and Figure 3 As shown, it also includes a 16-open table 18, on which a belt shaft a17 and a belt shaft b22 are arranged, and the belt shaft a17 and the belt shaft b22 are connected by a transmission belt 21; a paper stopper 20 is also arranged on the 16-open table 18; and three piezoelectric pressure sensors 23 are arranged in the middle of the paper stopper 20;

[0031] A laser displacement sensor 19 is installed on the 16-opening table 18. The laser displacement sensor 19 is close to the paper stopper 20, with the paper feed axis as the symmetry axis, two on each side, and a total of four sensors are placed;

[0032] The inclination sensor 8, the laser displacement sensor 19, and the piezoelectric pressure sensor 23 are all connected to the PLC controller; the PLC controller is also connected to the servo motor 4;

[0033] The servo motor 4 is a high-precision servo motor. As the core power source, it has the ability to accurately control the speed and torque, and can provide stable and accurate power support for the entire phase adjustment process.

[0034] Example 3

[0035] The working principle of the dual rigid wheel differential harmonic reducer 3 is as follows: it is mainly composed of a wave generator, a rigid wheel D, a rigid wheel S and a flexible wheel. Among them, the number of teeth of the rigid wheel D is the same as that of the flexible wheel, and the number of teeth of the rigid wheel S is 2 more than that of the D wheel. When the wave generator starts to rotate under the drive of the servo motor, it will cause the flexible wheel to produce elastic deformation, thereby causing the flexible wheel to mesh with the rigid wheels D and S. Due to the difference in the number of teeth between the rigid wheels S and D, differential motion will be generated during the elastic deformation and meshing process of the flexible wheels. This differential motion not only realizes the deceleration function, but also can cleverly change the size and direction of the output torque, so it is effectively used for phase adjustment in the present invention. The manufacturer of the dual rigid wheel differential harmonic reducer 3 is Cancer Intelligent Drive Technology Co., Ltd., and the model is CMFD-40-50-DR0100.

[0036] The precise control characteristics of the servo motor combined with the unique differential principle of the dual rigid wheel differential harmonic reducer can achieve high-precision adjustment of the folding machine phase. During the folding process, the folding position of each sheet of paper is ensured to be accurate.

[0037] Example 4

[0038] The specific working process of the 16-fold folding adjustment device of the roll paper folding machine of the present invention is as follows:

[0039] (1) Working process of the 16-fold folding machete: The power of the mechanism is input through the belt gear 1. While driving the belt to run, the power is transmitted to the phase input gear 2 through gear meshing. The phase input gear 2 is connected to the phase output gear 6 through the dual rigid wheel differential harmonic reducer 3. Under the premise that the servo motor 4 is not working, the phase input gear 2 and the phase output gear 6 can be regarded as a whole, and then the power is transmitted to the phase output gear 6. The subsequent power is transmitted to the intermediate gear 7, the power transmission shaft 16, the bevel gear II 15 and the bevel gear I 14 in sequence, and finally transmitted to the crank shaft 13. The crank shaft 13, the connecting rod 12, the swing arm 10 and the machete arm 11 constitute a crank-connecting rod mechanism. Driven by the crank shaft 13, the swing arm 10 can achieve regular swinging, thereby driving the machete to perform rhythmic chopping actions.

[0040] (2) The specific working process of phase adjustment is as follows: after the servo motor 4 is started, its output shaft drives the support shaft 5 to rotate, which in turn drives the wave generator in the double rigid wheel harmonic reducer 3 to rotate, and the flexible wheel meshes with the rigid wheel D and the rigid wheel S under the action of the wave generator. Due to the difference in the number of teeth of the two rigid wheels, differential motion will occur between the two rigid wheels, and the phase input gear 2 and the phase output gear 6 connected to them will also undergo differential motion, that is, there will be a phase difference between the two, and finally the precise control of the 16-open phase of the folder is achieved, ensuring the high precision and stability of the folding process.

[0041] (3) Adaptive adjustment mechanism

[0042] like Figure 4 As shown, adjustment based on the position and motion state of the paper: a laser displacement sensor 19 is installed on the 16-page table, which can accurately monitor the position change of the paper on the table in real time. A piezoelectric pressure sensor 23 is set on the paper stop block 20, which can sense whether the paper has reached the paper stop block. The two sets of sensor signals simultaneously identify the position of the paper and complement each other. At the same time, an inclination sensor 8 is installed on the swing arm 10, which can accurately monitor the motion posture of the chopping knife through high-precision measuring elements and algorithms. The rich data collected by these sensors will be transmitted to the control system in real time. The intelligent algorithm program built into the control system quickly analyzes, processes and compares the received data. According to the preset logical rules and mathematical models, the phase adjustment amount required for the chopper is accurately calculated, and accurate control instructions are sent to the servo motor 4 to drive the motor to operate, thereby realizing real-time and automatic adjustment of the chopper phase, ensuring that the folding action always matches the actual position and motion state of the paper.

[0043] like Figure 5 As shown, adjustment based on paper quality: three piezoelectric pressure sensors 23 are symmetrically arranged on the middle paper baffle of the paper baffle 20. The sensors are based on the principle of piezoelectric effect and can keenly sense the pressure of the paper hitting the paper baffle. Since the impact force of paper products with different gram weights hitting the paper baffle at the same speed is significantly different, the control system can quickly determine the quality type of the paper by acquiring the pressure size data and combining it with the preset database of pressure thresholds for different paper products. Then, according to the paper quality, the corresponding chopper phase adjustment amount and the rotation amount of the servo motor output shaft are given, and the operation of the servo motor 4 is controlled in real time to achieve real-time and automatic adjustment of the chopper phase. At the same time, once the pressure exceeds the normal range, it means that there may be quality problems with the paper or the chopper action is abnormal. The sensor will quickly feed back the abnormal signal to the control system, and the control system will immediately issue an alarm message to prompt the operator to check and handle it, effectively reducing the waste of folding and pasting caused by it.

[0044] Example 5

[0045] The 16-fold folding adjustment method of the web paper folding machine of the present invention is specifically as follows:

[0046] After the servo motor 4 is started, its output shaft drives the support shaft 5 to rotate, which in turn drives the wave generator in the double rigid wheel harmonic reducer to rotate, and the flexible wheel meshes with the rigid wheel D and the rigid wheel S under the action of the wave generator. Due to the difference in the number of teeth of the two rigid wheels, differential motion will occur between the two rigid wheels, and the phase input gear 2 and the phase output gear 6 connected to them will also have differential motion, that is, there will be a phase difference between the two, and finally the precise control of the 16-open phase of the folder is achieved, ensuring the high precision and stability of the folding process.

[0047] The mathematical model algorithm of phase adjustment is as follows:

[0048] (1) Variable definition

[0049] Δθ is the phase adjustment of the chopper; θ servo is the rotation amount of the servo motor output shaft; Z D is the number of teeth of the rigid wheel D; Z S is the number of teeth of the steel wheel S; Z R is the number of teeth of the flexspline;

[0050] (2) Calculate the transmission ratio

[0051]

[0052] Where: i 52 is the transmission ratio from the phase support shaft 5 to the phase input gear 2; i 56 is the transmission ratio from the phase support shaft 5 to the phase output gear 6; ω5 is the phase support shaft angular velocity; ω2 is the phase input gear angular velocity; ω6 is the phase output gear angular velocity.

[0053] The number of teeth on the rigid wheel D is equal to that on the flexible wheel, so i 52 = 1. There is a tooth difference between the rigid wheel S and the flexible wheel, so i 56 ≠1;

[0054] (3) Phase adjustment calculation

[0055] In the crank-rocker mechanism, let the length of the crank (the crankshaft 13 in the present invention) be r1, the length of the connecting rod 12 be r2, the length of the rocker (the swing arm 10) be r3, the length of the frame (equivalent to the wall panel in the present invention) be r4, the angle between the crank and the frame be θ1 (i.e., the crank swing angle), and the angle between the rocker and the frame be θ3 (i.e., the rocker swing angle). According to the law of cosines, the analytical relationship between the crank swing angle and the rocker swing angle can be derived. The rearranged expression is as follows:

[0056]

[0057] Further we can get:

[0058]

[0059] Finally, the chopper phase adjustment Δθ and the servo motor output shaft rotation θ are obtained. servo The algebraic relationship of .

[0060] The algorithm of adaptive adjustment mathematical model is as follows:

[0061] (1) Variable definition

[0062] x paper(t) is the position of the paper on the 16-page table at time t (obtained by the laser displacement sensor 19), in millimeters (mm);

[0063] v paper (t) is the speed of the paper at time t, in millimeters per second (mm / s), which can be obtained by paper (t) Take the derivative and get;

[0064] x target It is the ideal position where the chopper should act when the paper reaches the paper stopper. It is a fixed value in millimeters (mm).

[0065] θ(t) is the inclination angle of the swing arm (connected to the chopper arm 11) at time t, which is obtained by the inclination sensor 8 and the unit is radian (rad).

[0066] ω(t) is the angular velocity of the swing arm at time t, in radians per second (rad / s), which can be obtained by differentiating θ(t);

[0067] α(t) is the angular acceleration of the swing arm at time t, in rad / s2 2 ), which can be obtained by differentiating ω(t);

[0068] t is the current time in seconds (s);

[0069] Δt is the time interval used for discretization processing, and its unit is second (s). It is usually a small value, such as 0.01s, to ensure calculation accuracy.

[0070] Assuming that the paper moves in a straight line at a uniform speed in a short time (within the local time period of the folding process), the position prediction formula of the paper at a certain time t+Δt in the future is:

[0071] x paper (t+Δt)=x paper (t)+v paper (t)·Δt

[0072] The movement of the chopper can be regarded as a rotational movement around the fulcrum of the swing arm 10. The angle change of the swing arm 10 is closely related to the position and phase of the chopper. Assuming the length of the swing arm is L (in millimeters, mm), the horizontal position x of the end point of the chopper is machete The relationship between (t) and the swing arm inclination angle θ(t) is:

[0073] x machete (t) = L sin(θ(t))

[0074] Taking its derivative, we can get the horizontal velocity of the end point of the chopper:

[0075] v machete(t) = L·ω(t)·cos(θ(t))

[0076] In order to make the machete reach the ideal position x on the paper target In order to accurately fold the leaves at the same time, it is necessary to calculate the phase adjustment required by the chopper.

[0077] First, calculate the remaining time t required for the paper to reach the ideal position remaining :

[0078]

[0079] Then, according to the current motion state of the machete, it is predicted that remaining The position x of the end point of the chopper at time machete (t+t remaining ): Set at t remaining During this time, the angular velocity and angular acceleration of the machete remain unchanged, then at t+t remaining The angle of the arm swing at any moment is:

[0080]

[0081] Accordingly, the horizontal position of the end point of the chopper is:

[0082] x machete (t+t remaining )=L·sin(θ(t+t remaining ))

[0083] Ideally, when the paper reaches x target When the chopper end point is at this position, that is, x machete (t+t remaining )=x target However, the actual calculation result may be biased, so the phase adjustment amount Δθ can be calculated using the following formula:

[0084]

[0085] According to the calculated phase adjustment Δθ, the chopper phase adjustment Δθ and the servo motor output shaft rotation θ servo The algebraic relationship of is finally used to determine the rotation amount of the motor output shaft, and then send control instructions to the servo motor.

[0086] Adjustment based on paper quality: The pressure of the paper hitting the paper stopper 20 is obtained through the piezoelectric pressure sensor 23, and combined with the preset database of pressure thresholds for different paper products, the quality type of the paper can be quickly determined. Then, according to the paper quality, the corresponding chopper phase adjustment amount and the rotation amount of the servo motor output shaft are given, and the operation of the servo motor 4 is controlled in real time to adjust the chopper phase. At the same time, once the pressure exceeds the normal range, it means that there may be quality problems with the paper or the chopper action is abnormal. The sensor will quickly feed back the abnormal signal to the control system, and the control system will immediately issue an alarm message to prompt the operator to check and handle it, effectively reducing the waste of folding and pasting caused by it.

[0087] Example 6

[0088] The present invention adopts a phase adjustment mechanism that cooperates with a double rigid wheel differential harmonic reducer 3, a phase input gear 2, a phase output gear 6 and a servo motor 4. Its innovative structural design and precise connection mode, combined with advanced differential harmonic transmission principle, achieve high-precision and rapid adjustment of the chopper phase under complex working conditions, ensuring the accuracy and stability of the folding action.

[0089] The intelligent sensor system composed of the laser displacement sensor 19, the piezoelectric pressure sensor 23 and the inclination sensor 8, and the intelligent control system based on the advanced algorithm deeply integrated therewith. The system can collect the key operating parameters of the paper and the equipment in real time and accurately, and realize the adaptive adjustment of the chopping knife phase through efficient data processing and intelligent decision-making mechanism, which is the key supporting technology for the present invention to realize automatic and intelligent folding.

[0090] The entire folding machine transmission system structure includes the precise matching and power transmission path between the belt gear 1, the intermediate gear 7, the bevel gear I 14, the bevel gear II 15, the power transmission shaft 16, the crank shaft 13, the connecting rod 12, the swing arm 10 and the chopper arm 11. It ensures the high efficiency, stability and accuracy of power transmission and provides a solid mechanical foundation for accurate folding.

[0091] Compared with the traditional complex gear transmission structure, the transmission mechanism of the present invention reduces unnecessary energy loss links and improves power transmission efficiency. At the same time, due to the non-stop phase adjustment function, production interruption caused by shutdown adjustment is avoided, which greatly improves the continuity and efficiency of production and reduces production costs.

Claims

1. A 16-fold folding adjustment device for a web folding machine, characterized in that: The invention comprises a servo motor (4), the output shaft of the servo motor (4) is connected to a phase support shaft (5), the phase support shaft (5) is connected to a double rigid wheel differential harmonic reducer (3), the double rigid wheel differential harmonic reducer (3) is respectively connected to a phase input gear (2) and a phase output gear (6); the phase output gear (6) is meshed with an intermediate gear (7), the intermediate gear (7) is connected to a power transmission shaft (16), the power transmission shaft (16) is connected to a bevel gear II (15), the bevel gear II (15) is meshed with a bevel gear I (14), the bevel gear I (14) is connected to a crankshaft (13), the crankshaft (13) is connected to a connecting rod (12), the connecting rod (12) is connected to a swing arm (10), the swing arm (10) swings back and forth around a swing arm support shaft (9), the swing arm (10) is connected to a chopper arm (11), and a chopper is provided on the chopper arm (11).

2. The 16-fold folding adjustment device for a web folding machine according to claim 1, characterized in that: The invention also comprises a 16-page table top (18), on which a belt shaft a (17) and a belt shaft b (22) are arranged, and the belt shaft a (17) and the belt shaft b (22) are connected via a transmission belt (21); and a paper stop block (20) is also arranged on the 16-page table top (18).

3. The 16-fold folding adjustment device for a web folding machine according to claim 2, characterized in that: The swing arm (10) is provided with a tilt sensor (8); the middle of the paper stopper (20) is provided with a piezoelectric pressure sensor (23); the sixteen-opening table surface (18) is installed with a laser displacement sensor (19), and the laser displacement sensor (19) is close to the paper stopper (20).

4. The sixteen-fold folding adjustment device for a web folding machine according to claim 3, characterized in that: The inclination sensor (8), the laser displacement sensor (19), and the piezoelectric pressure sensor (23) are all connected to a PLC controller; the PLC controller is also connected to a servo motor (4).

5. The sixteen-fold folding adjustment device for a web folding machine according to claim 1, characterized in that: It also includes a belt gear (1), wherein the belt gear (1) is meshed with the phase input gear (2).

6. The sixteen-fold folding adjustment device for a roll paper folding machine according to claim 1, characterized in that: The phase support shaft (5) is connected to the dual rigid wheel differential harmonic reducer (3) via a key.

7. The sixteen-fold folding adjustment device for a roll paper folding machine according to claim 1, characterized in that: The rigid wheel D in the dual rigid wheel differential harmonic reducer (3) is connected to the phase input gear (2) via screws, and the rigid wheel S in the dual rigid wheel differential harmonic reducer (3) is connected to the phase output gear (6) via screws.

8. A method for adjusting the folding of sixteen pages of a web-folding machine, using the device for adjusting the folding of sixteen pages of a web-folding machine as claimed in claim 4, characterized in that: Specifically: After the servo motor (4) is started, its output shaft drives the support shaft (5) to rotate, which in turn drives the double rigid wheel harmonic reducer (3) to rotate, and the phase input gear (2) and phase output gear (6) connected thereto also undergo differential motion, that is, a phase difference will appear between the two, thereby achieving adjustment of the sixteen-page phase of the folding machine; the laser displacement sensor (19) can accurately monitor the position change of the paper on the table in real time; the piezoelectric pressure sensor (23) can sense whether the paper has reached the paper stop block (20); the inclination sensor (8) can monitor the movement posture of the chopping knife; the collected data will be transmitted to the PLC controller, the phase adjustment amount required for the chopping knife will be calculated, and the control instruction will be sent to the servo motor (4), thereby achieving adjustment of the chopping knife phase.

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