Paperboard right-angle position cutting method, device and equipment and storage medium

Abstract

The invention relates to the technical field of paperboard cutting, in particular to a right-angle position cutting method, device and equipment for paperboards and a storage medium. According to the method, through a closed-loop feedback mechanism of a first encoder and a second encoder, in combination with independent control of an angle cutter servo driver and a main motor, the fixed linkage limitation of an angle cutter and a grooving cutter in the prior art is broken through, and the cutting efficiency is improved. Flexible adjustment of the rotating speed and the track of the angle cutter and high-precision synchronous control of the grooving cutter and the angle cutter are achieved, the right-angle cutting precision is remarkably improved, and the angle cutter can adapt to paperboards of different specifications and has the advantage of being high in universality. By means of four-stage S-shaped acceleration curve control, rigid impact and vibration in the angle knife starting and stopping stage are effectively eliminated, linear speed fluctuation in the cutting process is reduced, and the phenomenon of paperboard conveying blockage is reduced, so that the cutting dislocation rate caused by blockage is reduced, and the yield is increased; in addition, through self-adaptive calculation of cutting core parameters, the equipment remodeling time can be shortened, then the production efficiency is improved, and the flexible production requirement is met.

Description

Technical Field

[0001] This invention relates to the field of cardboard cutting technology, and in particular to a method, apparatus, equipment and storage medium for cutting cardboard at right angles. Background Technology

[0002] In the production process of corrugated boxes, existing corrugated box printing machines generally use a fixed linkage control method for the corner knife and the slotting knife when performing the slotting box forming process. That is, the two usually share a transmission system and are not equipped with independent servo devices. The linkage control method of the corner knife and the slotting knife makes it impossible to adjust the rotation speed and cutting trajectory of the corner knife independently. They can only keep in sync with the movement of the slotting knife, resulting in a single corner cutting trajectory, which is difficult to meet diverse production needs.

[0003] Corrugated cardboard printing machines that use a fixed linkage control method for corner knives and slotting knives produce larger cardboard sizes. As the slotting knife length increases accordingly, the L-shaped redundant area formed by a single cut by the corner knife increases significantly, resulting in wide and long paper scraps. The width of the paper scraps is related to the lateral dimension of the corner redundancy, while the length of the paper scraps corresponds to the longitudinal dimension in the slotting direction, exhibiting an overall wide and long characteristic. The wide and long paper scraps formed after cutting the L-shaped redundant area are prone to getting stuck in the gaps of the conveyor rollers and the blade shaft bearings due to their large volume and light weight, leading to a series of production problems: First, the equipment needs to be stopped frequently for paper scrap cleaning, resulting in a significant reduction in overall production efficiency; second, paperboard conveying jams will cause paperboard misalignment, resulting in misalignment in subsequent cutting and folding processes, leading to an increase in the product defect rate; third, paper scraps wrapped around the blade shaft will increase bearing friction, shorten the blade shaft's service life, and thus increase equipment maintenance costs.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a method for cutting cardboard at right angles. By using real-time feedback from dual encoders and S-shaped acceleration curve control, the core problems of low synchronization accuracy, high cutting misalignment rate and low changeover efficiency in traditional cutting processes are solved.

[0006] The first aspect of this invention provides a method for right-angle cutting of cardboard. A corrugated box printing machine includes a slotting knife, a corner knife, a main motor driven by the slotting knife, and a corner knife servo driver driven by the corner knife. A first encoder is mounted on the cutter shaft of the slotting knife, and a second encoder is mounted on the cutter shaft of the corner knife. The right-angle cutting method includes: acquiring the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine; determining core cutting parameters based on the specifications and equipment parameters; generating an S-shaped acceleration curve based on the core cutting parameters, the S-shaped acceleration curve including four sequentially executed adjustment stages, namely a first cutting stage, an acceleration transition stage, a second cutting stage, and a cycle reset stage; acquiring the real-time feedback of the slotting knife rotation distance from the first encoder; confirming the current adjustment stage based on the slotting knife rotation distance and the S-shaped acceleration curve; and adjusting the operating parameters of the main motor and the corner knife servo driver based on the confirmed current adjustment stage, the real-time feedback of the slotting knife rotation distance from the first encoder, the real-time feedback of the corner knife rotation distance from the second encoder, and the S-shaped acceleration curve.

[0007] Optionally, in a first implementation of the first aspect of the present invention, the step of obtaining the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine, and determining the core cutting parameters based on the specifications and the equipment parameters, includes: obtaining the specifications of the cardboard to be cut, the specifications including cardboard size, cardboard material, and cardboard thickness; obtaining the equipment parameters of the corrugated box printing machine, the equipment parameters including corner blade diameter, grooving blade diameter, and corner blade maximum acceleration; and determining the core cutting parameters based on the specifications and the equipment parameters, the core cutting parameters including corner blade rotation circumference, grooving blade rotation circumference, paper scrap length from two cuts, and a cutting distance with consistent linear velocity; wherein the corner blade rotation circumference is calculated based on the corner blade diameter, the grooving blade rotation circumference is calculated based on the grooving blade diameter, the paper scrap length from two cuts is determined based on the cardboard size, and the cutting distance with consistent linear velocity is determined based on the cardboard material and cardboard thickness.

[0008] Optionally, in a second implementation of the first aspect of the present invention, the step of generating an S-shaped acceleration curve based on core cutting parameters, wherein the S-shaped acceleration curve includes four sequentially executed adjustment stages, namely a first cutting stage, an acceleration transition stage, a second cutting stage, and a cycle reset stage, includes: determining four stage switching anchor points based on core cutting parameters, namely a first cutting end anchor point, an acceleration transition end anchor point, a second cutting end anchor point, and a cycle reset end anchor point; determining four sequentially executed adjustment stages based on the four stage switching anchor points, and determining rotation distance information corresponding to each adjustment stage, wherein the rotation distance information includes the grooving blade rotation distance and the corner blade rotation distance; calculating the corner blade average acceleration corresponding to each adjustment stage based on the corner blade rotation distance and the core cutting parameters; and constructing an S-shaped acceleration curve with the grooving blade rotation distance as the abscissa and the corner blade rotation distance as the ordinate based on the rotation distance information and the corner blade average acceleration.

[0009] Optionally, in a third implementation of the first aspect of the present invention, determining four stage switching anchor points based on core cutting parameters, wherein the four stage switching anchor points are a first-stage cutting end anchor point, an accelerated transition end anchor point, a second-stage cutting end anchor point, and a cycle reset end anchor point, includes: determining the abscissa and ordinate of the first-stage cutting end anchor point based on the cutting distance with consistent linear speed; determining the abscissa of the accelerated transition end anchor point based on the cutting distance with consistent linear speed and the paper scrap length of the two cuts, and determining the ordinate of the transition end anchor point based on the rotation circumference of the corner blade; determining the abscissa of the second-stage cutting end anchor point based on the cutting distance with consistent linear speed and the paper scrap length of the two cuts, and determining the ordinate of the second-stage cutting end anchor point based on the rotation circumference of the corner blade and the cutting distance with consistent linear speed; determining the abscissa of the cycle reset anchor point based on the rotation circumference of the grooving blade, and determining the ordinate of the cycle reset anchor point based on the rotation circumference of the corner blade.

[0010] Optionally, in a fourth implementation of the first aspect of the present invention, obtaining the grooving blade rotation distance fed back by the first encoder in real time, and confirming the current adjustment stage based on the grooving blade rotation distance and the S-shaped acceleration curve, includes: when the grooving blade rotation distance fed back by the first encoder in real time is less than the cutting distance with the same linear speed, the current adjustment stage is the first cutting segment; when the cutting distance with the same linear speed is less than or equal to the grooving blade rotation distance and the sum of the cutting distance with the same linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the acceleration transition segment; when the cutting distance with the same linear speed and the sum of the length of the paper scraps from the two cuts is less than or equal to the grooving blade rotation distance and the sum of the cutting distance with twice the same linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the second cutting segment; when the cutting distance with twice the same linear speed and the sum of the length of the paper scraps from the two cuts is less than or equal to the grooving blade rotation distance and the circumference of the grooving blade, the current adjustment stage is the cycle reset segment.

[0011] Optionally, in a fifth implementation of the first aspect of the present invention, adjusting the operating parameters of the main motor and the corner knife servo driver based on the confirmed current adjustment stage, the real-time rotation distance of the grooving cutter fed back by the first encoder, the real-time rotation distance of the corner knife fed back by the second encoder, and the S-shaped acceleration curve includes: calculating the baseline linear velocity based on the circumference of the grooving cutter; when the current adjustment stage is the first cutting segment, adjusting the operating parameters of the main motor and the corner knife servo driver based on the real-time rotation distance of the grooving cutter fed back by the first encoder and the real-time rotation distance of the corner knife fed back by the second encoder, so that the real-time linear velocity of the grooving cutter and the real-time linear velocity of the corner knife are consistent with the baseline linear velocity; when the current adjustment stage is the acceleration transition segment, adjusting the operating parameters of the main motor based on the real-time rotation distance of the grooving cutter fed back by the first encoder, so that the real-time linear velocity of the grooving cutter is consistent with the baseline linear velocity, and adjusting the corner knife servo driver based on the S-shaped acceleration curve. The operating parameters of the knife servo driver are adjusted to ensure that when the acceleration transition end anchor point is reached, the rotation distance of the corner knife fed back in real time by the second encoder is consistent with the rotation circumference of the corner knife. When the current adjustment stage is the secondary cutting stage, the operating parameters of the main motor and the corner knife servo driver are adjusted based on the rotation distance of the grooving knife fed back in real time by the first encoder and the rotation distance of the corner knife fed back in real time by the second encoder, so that the real-time linear velocity of the grooving knife is consistent with the baseline linear velocity, and the real-time linear velocity of the corner knife is reduced to be consistent with the baseline linear velocity. When the current adjustment stage is the cyclic reset stage, the operating parameters of the main motor are adjusted based on the rotation distance of the grooving knife fed back in real time by the first encoder, so that the real-time linear velocity of the grooving knife is consistent with the baseline linear velocity, and the operating parameters of the corner knife servo driver are adjusted based on the S-shaped acceleration curve to ensure that when the acceleration cyclic reset end anchor point is reached, the rotation distance of the corner knife fed back in real time by the second encoder is consistent with twice the rotation circumference of the corner knife.

[0012] Optionally, in a sixth implementation of the first aspect of the present invention, adjusting the operating parameters of the corner cutter servo driver based on the S-shaped acceleration curve to ensure that the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference when the acceleration transition end anchor point is reached includes: generating a control sequence corresponding to time and rotation speed according to the S-shaped acceleration curve; adjusting the operating parameters of the corner cutter servo driver according to the generated control sequence to ensure that the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference when the acceleration transition end anchor point is reached; during the adjustment of the operating parameters of the corner cutter servo driver, the rotation speed of the corner cutter servo driver is corrected in real time based on the corner cutter rotation distance fed back by the second encoder, and ensuring that the real-time acceleration of the corner cutter servo driver is ≤ the maximum acceleration of the corner cutter.

[0013] A second aspect of the present invention provides a right-angle cutting device for cardboard, comprising: a parameter determination module, configured to acquire specification parameters of the cardboard to be cut and equipment parameters of a corrugated carton printing machine, and determine core cutting parameters based on the specification parameters and the equipment parameters; a generation module, configured to generate an S-shaped acceleration curve based on the core cutting parameters, the S-shaped acceleration curve including four sequentially executed adjustment stages, the four adjustment stages being a first cutting stage, an acceleration transition stage, a second cutting stage, and a cycle reset stage; a stage determination module, configured to acquire the grooving knife rotation distance fed back in real time by a first encoder, and confirm the current adjustment stage based on the grooving knife rotation distance and the S-shaped acceleration curve; and an adjustment module, configured to adjust the operating parameters of the main motor and the corner knife servo driver based on the confirmed current adjustment stage, the grooving knife rotation distance fed back in real time by the first encoder, the corner knife rotation distance fed back in real time by the second encoder, and the S-shaped acceleration curve.

[0014] A third aspect of the present invention provides a right-angle cutting device for cardboard, the right-angle cutting device for cardboard comprising: a memory and at least one processor, the memory storing instructions; at least one processor calling the instructions in the memory to cause the right-angle cutting device for cardboard to perform the various steps of the right-angle cutting method for cardboard described in any of the preceding claims.

[0015] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when executed by a processor, implement the steps of the right-angle cutting method for cardboard described in any of the preceding claims.

[0016] The technical solution of this invention solves the core problems of low synchronization accuracy, high cutting misalignment rate, and low changeover efficiency in traditional cutting processes by using real-time feedback from dual encoders and S-curve acceleration control. Specifically, through the closed-loop feedback mechanism of the first and second encoders, combined with the independent control of the corner knife servo driver and the main motor, the fixed linkage limitation between the corner knife and the slotting knife in the prior art is broken, realizing flexible adjustment of the corner knife speed and trajectory and high-precision synchronous control of the slotting knife and the corner knife, significantly improving the right-angle cutting accuracy, and adapting to different specifications of cardboard. Through four-stage S-curve acceleration control, the rigid impact and vibration during the corner knife start-up and stop stages are effectively eliminated, reducing linear speed fluctuations in the cutting process and reducing cardboard conveying jams, thereby reducing the cutting misalignment rate caused by jams and improving the yield rate. In addition, through adaptive calculation of the core cutting parameters, the equipment changeover time can be shortened, thereby improving production efficiency and meeting the needs of flexible production. Attached Figure Description

[0017] Figure 1 A logic flowchart of a paperboard right-angle cutting method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the right-angle cutting device for cardboard provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a right-angle cutting device for cardboard provided in an embodiment of the present invention. Detailed Implementation

[0018] This invention provides a method, apparatus, device, and storage medium for right-angle cutting of cardboard. In this invention, the terms "first," "second," "third," "fourth," etc. (if present)," in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" or "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] This technical solution focuses on the slotting and box-forming process of corrugated cardboard box printing machines. It provides a precise motion control and cutting logic solution to address the paper scrap accumulation problem in the corner cutting step of this process. Slotting and box-forming is a key process in corrugated cardboard box forming, requiring the completion of two core actions: slot opening and corner cutting. These two actions are synchronized and coordinated, as detailed below: 1. After printing, the corrugated cardboard is first processed by a slotting knife to create the slots required for the box shape, such as the side wall slots and flap folding slots. The length and position parameters of the slots directly determine the height and width of the box after it is assembled. Then, the corner knife needs to cut the four corners of the cardboard simultaneously or in succession. Since the corners of the cardboard form an L-shaped redundant area after slotting, if they are not cut, wrinkles will appear at the corners when folding into a box, and a standard right angle cannot be formed. Therefore, the corner cutting accuracy directly affects the flatness of the right angles after the box is assembled. Moreover, the cutting action needs to be coordinated with the movement rhythm of the slotting knife to avoid deviation during the cardboard conveying process. 2. Both the grooving knife and the corner knife are driven by the equipment's transmission system. The cardboard moves at a constant speed with the conveyor rollers. The rotational linear speed of the grooving knife must be consistent with the cardboard conveying speed to ensure that the groove length is accurately controllable. At the same time, the cutting trajectory of the corner knife must be precisely aligned with the groove position processed by the grooving knife to ensure that there is no misalignment between the corner and the groove after cutting. The coordination of their movements directly affects the boxing quality and the amount of paper scraps generated during the cutting process.

[0020] To achieve the right-angle cutting method for cardboard according to this application, a corrugated carton printing machine with the following structure is adopted: It includes a frame, a cardboard conveying mechanism mounted on the frame, a slotting knife assembly, a corner knife assembly, and a main drive system. The slotting knife assembly includes a horizontally arranged slotting knife shaft and at least two slotting knives fixed on the shaft. The corner knife assembly includes a corner knife shaft arranged parallel to the slotting knife shaft and at least two corner knives fixed on the shaft. The main drive system includes a main motor that drives the slotting knife shaft to rotate, and the main motor is connected to the slotting knife shaft via a pulley assembly. It also includes a corner knife servo driver connected to the corner knife shaft, which is connected to the corner knife shaft via a planetary gear reducer. A first encoder is coaxially arranged at the input end of the slotting knife shaft. The first encoder is an incremental rotary encoder and is electrically connected to the control module of the main motor. A second encoder is coaxially arranged at the output end of the corner knife shaft. The second encoder is an absolute rotary encoder and is electrically connected to the feedback port of the corner knife servo driver.

[0021] For ease of understanding, the specific process of the embodiments of the present invention is described below. Please refer to [link / reference]. Figure 1 One embodiment of the paperboard right-angle cutting method in this invention includes: 101. Obtain the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine, and determine the core cutting parameters based on the specifications and equipment parameters; In this embodiment, the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine are collected first. Through the correlation calculation between the two, the core cutting parameters for subsequent control are obtained, providing a data basis for the subsequent generation and control of the S-shaped acceleration curve.

[0022] 102. Generate an S-shaped acceleration curve based on core cutting parameters. The S-shaped acceleration curve includes four sequentially executed adjustment stages, namely, a first cutting stage, an acceleration transition stage, a second cutting stage, and a loop reset stage. In this embodiment, based on the core cutting parameters, an S-shaped acceleration curve is constructed, which includes a first cutting segment, an acceleration transition segment, a second cutting segment, and a cycle reset segment. The core of the S-shaped acceleration curve is to avoid motor impact through smooth acceleration changes. The four stages correspond to the complete cycle of cardboard cutting. Compared with the traditional linear acceleration curve, the acceleration of the S-shaped acceleration curve gradually increases from 0 to the maximum value and then decreases to 0, which can reduce the impact of motor start-stop and avoid cardboard conveying vibration.

[0023] 103. Obtain the grooving cutter rotation distance fed back by the first encoder in real time, and confirm the current adjustment stage based on the grooving cutter rotation distance and the S-shaped acceleration curve; 104. Based on the confirmed current adjustment stage, the grooving cutter rotation distance fed back in real time by the first encoder, the corner cutter rotation distance fed back in real time by the second encoder, and the S-shaped acceleration curve, adjust the operating parameters of the main motor and the corner cutter servo driver. In this embodiment, the rotation distance of the slotting knife is read in real time by the first encoder, and the rotation distance is compared with the stage anchor point on the S-shaped acceleration curve to determine which adjustment stage the corrugated carton printing machine is currently in. Combining the current adjustment stage, the real-time rotation distance fed back by the two encoders and the S-shaped acceleration curve, the operating parameters of the main motor for controlling the slotting knife and the corner knife servo driver for controlling the corner knife are dynamically adjusted to ensure that the two move in coordination.

[0024] This application discloses a method for right-angle cutting of cardboard. Through real-time feedback from dual encoders and S-curve acceleration control, it solves core problems in traditional cutting processes such as low synchronization accuracy, high cutting misalignment rate, and low changeover efficiency. Specifically, by using a closed-loop feedback mechanism between the first and second encoders, combined with independent control of the corner knife servo driver and the main motor, it breaks through the fixed linkage limitation of the corner knife and slotting knife in existing technologies. This enables flexible adjustment of the corner knife speed and trajectory, as well as high-precision synchronous control of the slotting knife and corner knife, significantly improving right-angle cutting accuracy and adapting to different cardboard specifications. Through four-stage S-curve acceleration control, it effectively eliminates rigid impact and vibration during the corner knife start-up and stop phases, reduces linear speed fluctuations during the cutting process, and reduces cardboard conveying jams, thereby lowering the cutting misalignment rate caused by jams and improving yield. Furthermore, through adaptive calculation of core cutting parameters, it can shorten equipment changeover time, thereby improving production efficiency and meeting the needs of flexible production.

[0025] In this embodiment of the invention, obtaining the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine, and determining the core cutting parameters based on the specifications and the equipment parameters, includes: 201. Obtain the specifications of the cardboard to be cut, including cardboard size, cardboard material and cardboard thickness; In this embodiment, the cardboard size, material, and thickness of the cardboard to be cut are collected. The cardboard size usually refers to large-sized cardboard with a side length ≥ 1.2m, and the cardboard size affects the length of paper scraps. The cardboard material affects the cutting resistance. The cardboard thickness is generally 3-8mm, which affects the cutting distance with consistent linear speed.

[0026] 202. Obtain the equipment parameters of the corrugated cardboard box printing machine, including the corner knife diameter, the slotting knife diameter, and the maximum acceleration of the corner knife; In this embodiment, the diameter of the corner knife, the diameter of the slotting knife, and the maximum acceleration of the corner knife of the corrugated carton printing machine are collected. The diameter of the corner knife is used to calculate the rotational circumference of the corner knife, the diameter of the slotting knife is used to calculate the rotational circumference of the slotting knife, and the maximum acceleration of the corner knife is a physical limitation of the equipment to avoid motor overload.

[0027] 203. Determine the core cutting parameters based on the specifications and equipment parameters. The core cutting parameters include the rotation circumference of the corner blade, the rotation circumference of the grooving blade, the length of paper scraps from the two cuts, and the cutting distance with consistent linear speed. The rotation circumference of the corner blade is calculated based on the diameter of the corner blade, the rotation circumference of the grooving blade is calculated based on the diameter of the grooving blade, the length of paper scraps from the two cuts is determined based on the cardboard size, and the cutting distance with consistent linear speed is determined based on the cardboard material and cardboard thickness. In this embodiment, the operator can input the cardboard specifications via the equipment's touchscreen, and the PLC derives the core cutting parameters through physical formulas and process logic: Let the circumference of the corner knife be C1, where C1 = π × corner knife diameter, and let the circumference of the grooving knife be C2, where C2 = π × grooving knife diameter. The circumferences of the corner knife and the circumference of the grooving knife need to be matched with the cardboard conveying speed. For example, when the cardboard conveying speed is 20m / min, a grooving knife circumference of 200mm corresponds to a rotation speed of 100r / min. The length of the paper scraps from the two cuts is determined according to the size of the cardboard, and is set as L. The length of the paper scraps L = the side length of the cardboard × 5% to ensure that the paper scraps can be discharged smoothly after cutting. It is usually 10-30mm. Let D be the cutting distance with consistent linear speed. D is determined based on the cardboard material or thickness, and its value ranges from 3 to 10 mm. For example, the cutting distance with consistent linear speed for thin cardboard is 3 to 5 mm to avoid overcutting and tearing; the cutting distance with consistent linear speed for thick cardboard is 6 to 10 mm to ensure a thorough cut. In this embodiment, the core cutting parameters are dynamically matched with the cardboard specifications and equipment performance, solving problems such as tearing of thin cardboard and incomplete cutting of thick cardboard caused by fixed parameters in traditional processes. The core cutting parameters are calculated by inputting cardboard parameters, replacing the traditional parameter setting method that relies on manual experience. This significantly reduces the error of the core cutting parameters, provides a precise data foundation for the subsequent generation of S-shaped acceleration curves, and avoids parameter setting errors caused by insufficient operator experience, thereby improving the ease of operation of the equipment and the accuracy of parameter settings.

[0028] In this embodiment of the invention, the generation of an S-shaped acceleration curve based on core trimming parameters includes four sequentially executed adjustment stages: a first trimming segment, an acceleration transition segment, a second trimming segment, and a loop reset segment. 301. Based on the core trimming parameters, four stage switching anchor points are determined. The four stage switching anchor points are the first trimming end anchor point, the accelerated transition end anchor point, the second trimming end anchor point, and the cycle reset end anchor point. 302. Based on the four stage switching anchor points, determine four sequentially executed adjustment stages, and determine the rotation distance information corresponding to each adjustment stage, wherein the rotation distance information includes the grooving cutter rotation distance and the corner cutter rotation distance; 303. Based on the corner blade rotation distance and the core cutting parameters, calculate the average acceleration of the corner blade corresponding to each adjustment stage; 304. Based on the rotation distance information and the average acceleration of the corner cutter, construct an S-shaped acceleration curve with the rotation distance of the grooving cutter as the abscissa and the rotation distance of the corner cutter as the ordinate; In this embodiment, the stage switching anchor point serves as the dividing point between the four adjustment stages. The four sequentially executed adjustment stages are divided using each stage switching anchor point as the boundary. The rotation distance of the grooving cutter within each adjustment stage is determined, i.e., the range of the horizontal coordinate X, and the rotation distance of the corner cutter, i.e., the range of the vertical coordinate Y. Based on the corner cutter rotation distance ΔY and the stage duration t of each adjustment stage, the stage duration t is calculated from the grooving cutter rotation distance ΔX and the baseline linear velocity V2, using the formula t = ΔX / V2. This is then applied using the average acceleration formula. Calculate the average acceleration of the corner cutter and ensure that a_avg ≤ the maximum acceleration of the corner cutter; finally, with the rotation distance of the grooving cutter as the abscissa and the rotation distance of the corner cutter as the ordinate, combine the calculated average acceleration and smooth transition logic to generate an S-shaped acceleration curve. The acceleration of the S-shaped acceleration curve has a smooth transition characteristic of first increasing and then decreasing.

[0029] In this embodiment, by quantitatively dividing the stage anchor points and smoothly controlling the transition of the S-shaped acceleration curve, the motor start-stop impact during the traditional process stage switching is effectively avoided, thus improving the stability of the cardboard conveying. During the generation of the S-shaped acceleration curve, the maximum acceleration limit of the corner knife is introduced to avoid the corner knife speed running out of control during the actual adjustment process based on the S-shaped acceleration curve, thereby significantly reducing the adjustment error of the corner knife rotation distance.

[0030] In this embodiment of the invention, the step of determining four stage switching anchor points based on core trimming parameters, wherein the four stage switching anchor points are the first trimming end anchor point, the accelerated transition end anchor point, the second trimming end anchor point, and the loop reset end anchor point, includes: 401. Based on the cutting distance with consistent linear velocity, determine the horizontal and vertical coordinates of the anchor point at the end of a single cutting operation; 402. Based on the cutting distance with consistent linear speed and the length of the paper scraps from the two cuttings, determine the horizontal coordinate of the acceleration transition end anchor point, and determine the vertical coordinate of the transition end anchor point based on the circumference of the corner blade rotation. 403. Based on the cutting distance with consistent linear speed and the length of the paper scraps from the two cuttings, determine the horizontal coordinate of the anchor point at the end of the second cutting, and based on the circumference of the corner blade rotation and the cutting distance with consistent linear speed, determine the vertical coordinate of the anchor point at the end of the second cutting. 404. Determine the abscissa of the cyclic reset anchor point based on the circumference of the grooving cutter, and determine the ordinate of the cyclic reset anchor point based on the circumference of the corner cutter; In this embodiment, the core logic of the first cutting end anchor point is as follows: the first cutting segment needs to maintain the same linear speed between the corner knife and the grooving knife. Therefore, the horizontal and vertical coordinates of the first cutting end anchor point are both equal to the cutting distance D with the same linear speed. The horizontal coordinate of the acceleration transition end anchor point is D+L to ensure that the grooving knife travels a distance L and matches the length of the paper scrap. Its vertical coordinate is length C1, so that the corner knife completes one rotation and resets to prepare for the second cutting. The horizontal coordinate of the second cutting end anchor point is D+L+D, so that the grooving knife enters the stage of consistent linear speed again. Its vertical coordinate is C1+D, so that the corner knife travels a distance D from the reset position and synchronizes with the linear speed of the grooving knife. The horizontal coordinate of the cycle reset end anchor point is C2, so that the grooving knife completes one grooving cycle. Its vertical coordinate is 2×C1, so that the corner knife's two rotations match the grooving knife's one-cycle movement, ensuring the initial position alignment of the cycle.

[0031] Specific parameter examples are as follows (unit: mm): Let D=5, L=20, C1=200, C2=300, then the coordinates of each anchor point are: Anchor point at the end of a single cut: (D, D) = (5, 5); Accelerated transition end anchor point: (D+L, C1) = (25, 200); Secondary cutting end anchor point: (D+L+D, C1+D) = (30, 205); End of cycle reset anchor point: (C2, 2×C1) = (300, 400).

[0032] In other embodiments, when the cardboard size changes, such as when the side length of the box increases from 1.2m to 1.5m, the length of the paper scraps L needs to be adjusted synchronously according to the process requirement of 10-30mm. For example, if it increases from 20mm to 25mm, the horizontal coordinate of each anchor point is dynamically updated with the value of L to maintain cutting accuracy.

[0033] In this embodiment, the quantitative calculation of anchor points enables precise matching of the rotation distance between the corner cutter and the grooving cutter. Compared with the positioning deviation caused by the reliance on manual visual alignment in traditional processes, this solution effectively avoids quality defects such as rough edges, missing right angles, and cutting offsets on cardboard caused by mechanical linkage errors and differences in human operating experience. At the same time, it reduces equipment downtime for adjustment due to poor alignment and improves cutting consistency and product qualification rate in continuous production.

[0034] In this embodiment of the invention, obtaining the real-time feedback rotation distance of the grooving cutter from the first encoder, and confirming the current adjustment stage based on the rotation distance of the grooving cutter and the S-shaped acceleration curve, includes: 501. When the grooving blade rotation distance fed back by the first encoder in real time is less than the cutting distance with the same linear speed, the current adjustment stage is the first cutting segment; 502. When the cutting distance with consistent linear speed is less than the rotation distance of the grooving knife and less than the sum of the cutting distance with consistent linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the acceleration transition stage. 503. When the sum of the cutting distance with consistent linear speed and the length of the paper scraps from the two cuts is less than the rotation distance of the grooving knife and less than twice the sum of the cutting distance with consistent linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the second cutting segment. 504. When the sum of the cutting distance at twice the linear speed and the length of the paper scraps from the two cuts is less than the grooving blade rotation distance and less than the grooving blade rotation circumference, the current adjustment stage is the cyclic reset stage. In this embodiment, the rotation distance of the grooving blade fed back by the first encoder is set to X0. The X0 value of the first encoder is read in real time and compared with the preset stage switching thresholds D, D+L, 2D+L, and C2 in sequence. When X0 < D, the device is in the first cutting stage. At this time, the angle blade and the grooving blade need to maintain the same linear speed to complete the first right-angle cutting. When D ≤ X0 < D+L, the device is in the acceleration transition stage. At this time, the grooving blade maintains a uniform speed, and the angle blade performs an acceleration action according to the S-shaped acceleration curve to complete the reset. When D+L≤X0<2D+L, the equipment is in the second cutting stage. At this time, the corner blade decelerates to synchronize with the baseline speed, completing the secondary cutting. When 2D+L≤X0<C2, the equipment is in the cycle reset stage. At this time, the corner blade performs speed compensation control to ensure that the corner blade rotation distance Y0=2×C1 fed back by the second encoder when X0=C2, preparing for the next cycle. If the X0 value exceeds the threshold range, such as X0>C2 but Y0 does not reach 2×C1, an alarm is triggered and the corner blade speed is automatically adjusted to avoid cycle interruption.

[0035] In this embodiment, a dynamic judgment mechanism that compares real-time sampling with thresholds shortens the stage switching control delay. Compared with the traditional fixed timing switching mode, it can effectively avoid stage overlap problems and adapt to the working conditions of different cardboard conveying speeds.

[0036] In this embodiment of the invention, adjusting the operating parameters of the main motor and the corner cutter servo driver based on the confirmed current adjustment stage, the real-time rotation distance of the grooving cutter fed back by the first encoder, the real-time rotation distance of the corner cutter fed back by the second encoder, and the S-shaped acceleration curve includes: 601. Calculate the baseline velocity based on the circumference of the grooving cutter's rotation; In this embodiment, the baseline speed is equal to the circumference of the grooving knife rotation C2 × the rotation speed of the grooving knife. The baseline speed is consistent with the paperboard conveying speed, which is usually 15-30 m / min and is a reference standard for the corner knife speed.

[0037] 602. When the current adjustment stage is the first cutting stage, based on the grooving knife rotation distance fed back in real time by the first encoder and the corner knife rotation distance fed back in real time by the second encoder, adjust the operating parameters of the main motor and the corner knife servo driver so that the real-time linear speed of the grooving knife and the real-time linear speed of the corner knife are consistent with the baseline linear speed. 603. When the current adjustment stage is the acceleration transition stage, the operating parameters of the main motor are adjusted based on the grooving cutter rotation distance fed back by the first encoder in real time, so that the real-time linear velocity of the grooving cutter is consistent with the baseline linear velocity. Based on the S-shaped acceleration curve, the operating parameters of the corner cutter servo driver are adjusted to ensure that when the acceleration transition end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference. 604. When the current adjustment stage is the secondary cutting stage, based on the grooving knife rotation distance fed back in real time by the first encoder and the corner knife rotation distance fed back in real time by the second encoder, adjust the operating parameters of the main motor and the corner knife servo driver so that the real-time linear speed of the grooving knife is consistent with the baseline linear speed, and reduce the real-time linear speed of the corner knife to be consistent with the baseline linear speed. 605. When the current adjustment stage is the cyclic reset stage, the operating parameters of the main motor are adjusted based on the grooving cutter rotation distance fed back by the first encoder in real time, so that the real-time linear velocity of the grooving cutter is consistent with the baseline linear velocity. Based on the S-shaped acceleration curve, the operating parameters of the corner cutter servo driver are adjusted to ensure that when the acceleration cyclic reset end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with twice the corner cutter rotation circumference. In this embodiment, in the first cutting section, based on the rotational distance feedback from the first and second encoders, the main motor and the corner knife servo driver are adjusted in real time to ensure that their real-time linear velocities are consistent with the baseline linear velocity, thus ensuring the accuracy of the first right-angle cutting. In the acceleration transition section, the main motor maintains the grooving knife's linear velocity equal to the baseline linear velocity, and the corner knife servo driver adjusts its speed according to an S-shaped acceleration curve to ensure that when the grooving knife rotates X=D+L, the corner knife rotates Y=C1, meaning the corner knife completes one revolution of rotation and resets. In the second cutting section, the main motor maintains the baseline linear velocity, and the corner knife servo driver performs deceleration control to reduce the corner knife's linear velocity to the baseline velocity, ensuring that the second cutting is completed when X=2D+L. In the cyclic reset section, the main motor maintains the baseline speed, and the corner knife servo driver performs speed compensation control to ensure... When X=C2, Y=2×C1, meaning the corner cutter completes 2 revolutions. Specifically: the linear speed error between the first and second cutting sections is controlled to be ≤0.1m / min, and the rotational distance error is ≤0.2mm. For example, when X=5mm, Y needs to be within the range of 4.8-5.2mm. During the acceleration transition section, the corner cutter speed increases from the reference speed to the target speed according to an S-shaped acceleration curve. During the cyclic reset section, the corner cutter speed is dynamically adjusted based on the real-time deviation of Y. For example, when Y=380mm and X=290mm, the speed needs to be increased to ensure that Y=400mm when X=300mm. During the main motor adjustment process, the speed is adjusted in real-time via the frequency converter: if the real-time linear speed of the grooving cutter fed back by the first encoder is greater than the reference linear speed, the frequency converter reduces the output frequency; conversely, it increases the output frequency to ensure stable grooving cutter speed.

[0038] In this embodiment, the coordinated speed control at each stage can avoid cardboard pulling caused by speed differences, thereby preventing groove deformation and corner tearing; the targeted speed adjustment of the acceleration transition section and the cycle reset section can reduce the corner knife idling time, shorten the reset cycle, and increase the single machine's production capacity; the stable speed control of the main motor and the smooth acceleration and deceleration process of the corner knife can reduce the mechanical friction of the knife shaft bearing, extend the bearing's service life, and reduce equipment maintenance costs.

[0039] In this embodiment of the invention, adjusting the operating parameters of the angle cutter servo driver based on the S-shaped acceleration curve to ensure that when the acceleration transition end anchor point is reached, the angle cutter rotation distance fed back in real time by the second encoder is consistent with the angle cutter rotation circumference includes: 701. Generate a control sequence corresponding to time and speed based on the S-shaped acceleration curve; In this embodiment, a control sequence corresponding to the time and rotation speed is generated based on the S-shaped acceleration curve to avoid secondary cutting misalignment caused by incomplete corner cutter reset. The time refers to the total duration of the stage and the time interval of the rotation speed at each moment. The total duration of the stage = grooving cutter rotation distance ÷ baseline speed, and the time interval = stage grooving cutter rotation distance ÷ baseline speed. The control sequence specifically generates a rotation speed command every 1ms, for example: 100r / min at 0ms; 125r / min at 50ms; and 150r / min at 100ms. During the generation of the control sequence, the maximum acceleration limit of the corner cutter needs to be considered. If the calculated theoretical acceleration exceeds the maximum acceleration of the corner cutter, the acceleration time is automatically extended to reduce the acceleration, ensuring that the actual acceleration does not exceed the maximum acceleration of the corner cutter.

[0040] 702. Based on the generated control sequence, adjust the operating parameters of the corner cutter servo driver to ensure that when the acceleration transition end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference. 703. During the adjustment of the operating parameters of the corner cutter servo drive, the rotation speed of the corner cutter servo drive is corrected in real time based on the corner cutter rotation distance fed back by the second encoder, and the real-time acceleration of the corner cutter servo drive is ensured to be less than or equal to the maximum acceleration of the corner cutter. In this embodiment, during the adjustment process, the Y value fed back by the second encoder in real time is compared with the theoretical Y value of the S-shaped acceleration curve. If there is a deviation, the angle knife speed is corrected in real time. At the same time, it is ensured that the real-time acceleration of the angle knife is less than or equal to the maximum acceleration of the angle knife. Through real-time acceleration monitoring and overload protection, the angle knife motor is prevented from burning out due to excessive acceleration.

[0041] The above describes the method for cutting paperboard at right angles in an embodiment of the present invention. The following describes the device for cutting paperboard at right angles in an embodiment of the present invention. Please refer to [link to relevant documentation]. Figure 2 One embodiment of the cardboard right-angle cutting device of the present invention includes: The parameter determination module 801 is used to obtain the specification parameters of the cardboard to be cut and the equipment parameters of the corrugated carton printing machine, and determine the core cutting parameters based on the specification parameters and the equipment parameters. The generation module 802 is used to generate an S-shaped acceleration curve based on the core cutting parameters. The S-shaped acceleration curve includes four adjustment stages executed sequentially. The four adjustment stages are a first cutting segment, an acceleration transition segment, a second cutting segment, and a loop reset segment. The stage determination module 803 is used to obtain the grooving cutter rotation distance fed back by the first encoder in real time, and to confirm the current adjustment stage based on the grooving cutter rotation distance and the S-shaped acceleration curve. The adjustment module 804 is used to adjust the operating parameters of the main motor and the corner knife servo drive based on the confirmed current adjustment stage, the grooving knife rotation distance fed back in real time by the first encoder, the corner knife rotation distance fed back in real time by the second encoder, and the S-shaped acceleration curve.

[0042] Based on the same ideas as the methods in the above embodiments, the apparatus provided in this application can implement the methods in the above embodiments.

[0043] above Figure 2 The right-angle cutting device for cardboard in this embodiment of the invention is described in detail from the perspective of modular functional entities. The right-angle cutting device for cardboard in this embodiment of the invention is described in detail from the perspective of hardware processing.

[0044] Figure 3 This is a schematic diagram of a right-angle cutting device for cardboard provided in an embodiment of the present invention. The right-angle cutting device 900 can vary significantly due to different configurations or performance characteristics. It may include one or more central processing units (CPUs) 910 (e.g., one or more processors) and a memory 920, and one or more storage media 930 (e.g., one or more mass storage devices) storing application programs 933 or data 932. The memory 920 and storage media 930 can be for short-term or long-term storage. The program stored in the storage media 930 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the right-angle cutting device 900. Furthermore, the processor 910 may be configured to communicate with the storage media 930 and execute the series of instruction operations in the storage media 930 on the right-angle cutting device 900 to implement the steps of the right-angle cutting method for cardboard provided in the above-described method embodiments.

[0045] The right-angle cutting device 900 for cardboard may also include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input / output interfaces 960, and / or one or more operating systems 931, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 3 The illustrated right-angle cutting device structure for cardboard does not constitute a limitation on the right-angle cutting device for cardboard, and may include more or fewer parts than illustrated, or combine certain parts, or have different part arrangements.

[0046] The present invention also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the right-angle cutting method for cardboard.

[0047] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system, device, or unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0048] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for cutting cardboard at right angles, the corrugated cardboard printing machine comprising a slotting knife, a corner knife, and a main motor connected to the slotting knife for transmission, characterized in that, It also includes a corner cutter servo driver connected to the corner cutter drive; a first encoder is provided on the cutter shaft of the grooving cutter, and a second encoder is provided on the cutter shaft of the corner cutter; the right-angle cutting method includes: Obtain the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine, and determine the core cutting parameters based on the specifications and equipment parameters; An S-shaped acceleration curve is generated based on the core cutting parameters. The S-shaped acceleration curve includes four adjustment stages executed sequentially. The four adjustment stages are the first cutting segment, the acceleration transition segment, the second cutting segment, and the loop reset segment. Obtain the grooving cutter rotation distance fed back in real time by the first encoder, and confirm the current adjustment stage based on the grooving cutter rotation distance and the S-shaped acceleration curve; Based on the confirmed current adjustment stage, the grooving cutter rotation distance fed back in real time by the first encoder, the corner cutter rotation distance fed back in real time by the second encoder, and the S-shaped acceleration curve, adjust the operating parameters of the main motor and the corner cutter servo drive.

2. The method for cutting cardboard at right angles according to claim 1, characterized in that, The process of obtaining the specifications of the cardboard to be cut and the equipment parameters of the corrugated box printing machine, and determining the core cutting parameters based on the specifications and equipment parameters, includes: Obtain the specifications of the cardboard to be cut, including cardboard size, cardboard material, and cardboard thickness; Obtain the equipment parameters of the corrugated cardboard box printing machine, including the corner knife diameter, the slotting knife diameter, and the maximum acceleration of the corner knife; The core cutting parameters are determined based on the specifications and equipment parameters. These core cutting parameters include the rotation circumference of the corner blade, the rotation circumference of the grooving blade, the length of paper scraps from the two cuts, and the cutting distance with consistent linear speed. The rotation circumference of the corner blade is calculated based on the diameter of the corner blade, the rotation circumference of the grooving blade is calculated based on the diameter of the grooving blade, the length of paper scraps from the two cuts is determined based on the cardboard size, and the cutting distance with consistent linear speed is determined based on the cardboard material and cardboard thickness.

3. The method for cutting cardboard at right angles according to claim 2, characterized in that, The S-shaped acceleration curve generated based on core trimming parameters includes four sequentially executed adjustment stages: a first trimming segment, an acceleration transition segment, a second trimming segment, and a loop reset segment. Based on the core trimming parameters, four stage switching anchor points are determined. The four stage switching anchor points are the first trimming end anchor point, the accelerated transition end anchor point, the second trimming end anchor point, and the cycle reset end anchor point. Based on the four stage switching anchor points, four adjustment stages to be executed sequentially are determined, and the rotation distance information corresponding to each adjustment stage is determined, including the rotation distance of the grooving cutter and the rotation distance of the corner cutter. Based on the corner blade rotation distance and the core cutting parameters, calculate the average acceleration of the corner blade corresponding to each adjustment stage; Based on the rotation distance information and the average acceleration of the corner cutter, an S-shaped acceleration curve is constructed with the rotation distance of the grooving cutter as the abscissa and the rotation distance of the corner cutter as the ordinate.

4. The method for cutting cardboard at right angles according to claim 3, characterized in that, The process involves determining four stage switching anchor points based on core trimming parameters. These four anchor points are: the first trimming end anchor point, the accelerated transition end anchor point, the second trimming end anchor point, and the loop reset end anchor point. Based on the cutting distance with consistent linear velocity, determine the horizontal and vertical coordinates of the anchor point at the end of a single cutting operation; Based on the cutting distance with consistent linear speed and the length of paper scraps from the two cuts, the horizontal coordinate of the acceleration transition end anchor point is determined, and the vertical coordinate of the transition end anchor point is determined based on the circumference of the corner blade rotation. Based on the cutting distance with consistent linear speed and the length of the paper scraps from the two cuts, the horizontal coordinate of the anchor point at the end of the second cut is determined, and based on the circumference of the corner blade rotation and the cutting distance with consistent linear speed, the vertical coordinate of the anchor point at the end of the second cut is determined. The horizontal coordinate of the cyclic reset anchor point is determined based on the circumference of the grooving cutter, and the vertical coordinate of the cyclic reset anchor point is determined based on the circumference of the corner cutter.

5. The method for cutting cardboard at right angles according to claim 3, characterized in that, The step of obtaining the grooving cutter rotation distance fed back in real time by the first encoder, and confirming the current adjustment stage based on the grooving cutter rotation distance and the S-shaped acceleration curve, includes: When the rotation distance of the grooving knife, which is fed back in real time by the first encoder, is less than the cutting distance with the same linear speed, the current adjustment stage is the first cutting segment. When the cutting distance with consistent linear speed is less than or equal to the rotation distance of the grooving knife and less than the sum of the cutting distance with consistent linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the acceleration transition stage. When the sum of the cutting distance at the same linear speed and the length of the paper scraps from the two cuts is less than the rotation distance of the grooving knife and less than twice the sum of the cutting distance at the same linear speed and the length of the paper scraps from the two cuts, the current adjustment stage is the second cutting segment. When the sum of the cutting distance at twice the linear speed and the length of the paper scraps from the two cuts is less than the grooving blade rotation distance and less than the grooving blade rotation circumference, the current adjustment stage is the cyclic reset stage.

6. The method for cutting cardboard at right angles according to claim 3, characterized in that, The step of adjusting the operating parameters of the main motor and the corner cutter servo drive based on the confirmed current adjustment stage, the real-time rotation distance of the grooving cutter fed back by the first encoder, the real-time rotation distance of the corner cutter fed back by the second encoder, and the S-shaped acceleration curve includes: Calculate the baseline velocity based on the circumference of the grooving cutter's rotation; When the current adjustment stage is the first cutting stage, the operating parameters of the main motor and the corner knife servo driver are adjusted based on the real-time feedback of the grooving knife rotation distance from the first encoder and the real-time feedback of the corner knife rotation distance from the second encoder, so that the real-time linear speed of the grooving knife and the real-time linear speed of the corner knife are consistent with the baseline linear speed. When the current adjustment phase is the acceleration transition phase, the operating parameters of the main motor are adjusted based on the grooving cutter rotation distance fed back by the first encoder in real time, so that the real-time linear velocity of the grooving cutter is consistent with the baseline linear velocity. Based on the S-shaped acceleration curve, the operating parameters of the corner cutter servo driver are adjusted to ensure that when the acceleration transition end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference. When the current adjustment stage is the secondary cutting stage, based on the grooving knife rotation distance fed back in real time by the first encoder and the corner knife rotation distance fed back in real time by the second encoder, the operating parameters of the main motor and the corner knife servo driver are adjusted so that the real-time linear speed of the grooving knife is consistent with the baseline linear speed, and the real-time linear speed of the corner knife is reduced to be consistent with the baseline linear speed. When the current adjustment phase is the cyclic reset phase, the operating parameters of the main motor are adjusted based on the grooving cutter rotation distance fed back by the first encoder in real time, so that the real-time linear velocity of the grooving cutter is consistent with the baseline linear velocity. Based on the S-shaped acceleration curve, the operating parameters of the corner cutter servo driver are adjusted to ensure that when the acceleration cyclic reset end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with twice the corner cutter rotation circumference.

7. The method for cutting cardboard at right angles according to claim 6, characterized in that, The step of adjusting the operating parameters of the angle cutter servo driver based on the S-shaped acceleration curve to ensure that when the acceleration transition end anchor point is reached, the angle cutter rotation distance fed back in real time by the second encoder is consistent with the angle cutter rotation circumference includes: A control sequence corresponding to time and speed is generated based on the S-shaped acceleration curve; Based on the generated control sequence, the operating parameters of the corner cutter servo driver are adjusted to ensure that when the acceleration transition end anchor point is reached, the corner cutter rotation distance fed back by the second encoder in real time is consistent with the corner cutter rotation circumference. During the adjustment of the operating parameters of the corner cutter servo drive, the rotational speed of the corner cutter servo drive is corrected in real time based on the corner cutter rotation distance fed back by the second encoder, and the real-time acceleration of the corner cutter servo drive is ensured to be less than or equal to the maximum acceleration of the corner cutter.

8. A right-angle cutting device for cardboard, characterized in that, include: The parameter determination module is used to obtain the specification parameters of the cardboard to be cut and the equipment parameters of the corrugated carton printing machine, and determine the core cutting parameters based on the specification parameters and the equipment parameters. The generation module is used to generate an S-shaped acceleration curve based on the core cutting parameters. The S-shaped acceleration curve includes four adjustment stages executed sequentially. The four adjustment stages are a first cutting segment, an acceleration transition segment, a second cutting segment, and a loop reset segment. The stage determination module is used to obtain the grooving cutter rotation distance fed back by the first encoder in real time, and to confirm the current adjustment stage based on the grooving cutter rotation distance and the S-shaped acceleration curve. The adjustment module is used to adjust the operating parameters of the main motor and the corner knife servo drive based on the confirmed current adjustment stage, the grooving knife rotation distance fed back in real time by the first encoder, the corner knife rotation distance fed back in real time by the second encoder, and the S-shaped acceleration curve.

9. A cardboard right-angle cutting device, characterized in that, The cardboard right-angle cutting device includes: a memory and at least one processor, wherein the memory stores instructions; At least one of the processors invokes the instructions in the memory to cause the cardboard right-angle cutting device to perform the various steps of the cardboard right-angle cutting method as claimed in any one of claims 1-7.

10. A computer-readable storage medium storing instructions thereon, characterized in that, When the instructions are executed by the processor, they implement the steps of the right-angle cutting method for cardboard as described in any one of claims 1-7.

Images