Packaging box forming system capable of automatically calibrating folding angle

Abstract

The invention relates to the technical field of packaging processing automatic control, in particular to a packaging box forming system with an automatic folding angle calibration function, which comprises a server, a second arc-shaped plate and a third arc-shaped plate, the second arc-shaped plate and the third arc-shaped plate are oppositely arranged, the second arc-shaped plate is used for controlling the transverse size of a packaging box, and the third arc-shaped plate is used for controlling the longitudinal size of the packaging box; the server is used for acquiring the adjusting signal and adjusting the relative position of the second arc-shaped plate and / or the third arc-shaped plate according to the adjusting signal; and the controller is further used for collecting a first image of the folded plane paperboard after the relative position of the second arc-shaped plate and / or the third arc-shaped plate is changed, judging whether the adjustment of the second arc-shaped plate and / or the third arc-shaped plate is qualified or not according to the first image, and adjusting the relative position of the second arc-shaped plate and / or the third arc-shaped plate again according to the first image when the adjustment is unqualified. By the adoption of the scheme, the folding angle of the packaging box can be automatically calibrated in the production process.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology in packaging processing, specifically to an automatic folding angle calibration packaging box forming system. Background Technology

[0002] Packaging boxes are common packaging tools in daily life, used to protect products and facilitate transport, such as for packaging fruits and gifts. Depending on the items being packaged, packaging boxes come in various styles, including common types such as corrugated boxes, drawer boxes, hinged-top boxes, double-slip boxes, snap-bottom boxes, and flat boxes. With the development of e-commerce platforms, the use of packaging boxes has become even more widespread; they can also be used to package clothing, hats, shoes, and socks, preventing them from being crushed or deformed during transportation. The size of the packaging box is selected according to the size of the product being packaged; therefore, in actual production, it is necessary to produce packaging boxes of the same shape in different specifications.

[0003] In existing technologies, packaging boxes are automatically produced using integrated equipment. When the specifications of the packaging boxes change, the equipment needs to be stopped, and some mechanisms need to be manually replaced or adjusted to change the specifications of the produced packaging boxes. Taking a folding box machine as an example, the folding box machine includes a suction mechanism and a folding mechanism. The suction mechanism is used to suction the flat cardboard that has been pressed along the creases, move it above the folding mechanism, and move and press down the flat cardboard. Working in conjunction with the folding mechanism, the flat cardboard is folded along the creases to obtain a three-dimensional cardboard, which takes the shape of a box. While maintaining the shape of the box, the folding mechanism moves the three-dimensional cardboard to the next process. The next process can be to bond and shape the three-dimensional cardboard, or to flip and snap the sides of the three-dimensional cardboard together.

[0004] When switching packaging box specifications, the folding mechanism needs to be disassembled and replaced, or the structure of the part of the folding mechanism that contacts the flat cardboard needs to be adjusted to change the box shape. Since the folding mechanism needs to work in conjunction with the suction mechanism, a certain level of installation precision is required. Therefore, repeated adjustments are necessary when replacing or adjusting the folding mechanism, and each adjustment requires manual intervention. In summary, when producing packaging boxes of different specifications, manual replacement or adjustment of the folding mechanism is required, which limits efficiency and accuracy, affecting production progress. Furthermore, repeated manual adjustments after replacement or adjustment further impact production schedules. Therefore, there is an urgent need for a packaging box forming system that can automatically calibrate the folding angle during the production process. Summary of the Invention

[0005] The present invention aims to provide an automatic folding angle calibration packaging box forming system that can automatically calibrate the folding angle of the packaging box during the production process.

[0006] This invention provides the following basic solution: A folding angle automatic calibration packaging box forming system includes a server, and a second arc plate and a third arc plate arranged opposite to each other. The second arc plate is used to control the lateral dimension of the packaging box, and the third arc plate is used to control the longitudinal dimension of the packaging box. The server is used to acquire adjustment signals and adjust the relative positions of the second and / or third curved plates according to the adjustment signals; it is also used to acquire the first image of the folded flat cardboard after the relative positions of the second and / or third curved plates change, determine whether the adjustment of the second and / or third curved plates is qualified according to the first image, and if it is not qualified, adjust the relative positions of the second and / or third curved plates again according to the first image.

[0007] Furthermore, the initial image includes the bottom and four sides of the folded flat cardboard, and the server includes: The rule judgment module is used to judge the shape rules of each side in the initial image; The shape matching module is used to perform shape matching on opposite sides in the initial image when all shapes are regular. The tilt judgment module is used to calculate the tilt of each side in the initial image when the shapes are all matched, and to determine whether the tilt meets the preset standard tilt range; when the tilt meets the standard tilt range, the adjustment is deemed qualified.

[0008] Furthermore, when the rule judgment module determines that the shape of any side is irregular, or the shape matching module determines that the shape of the opposite side is mismatched, or the tilt judgment module determines that the tilt of any side exceeds the standard tilt range, the server is also used to determine that the adjustment is unqualified and generate the reason for the unqualified adjustment. The reasons for the unqualified adjustment include adjustment failure, equipment failure and other failures.

[0009] Furthermore, the server is also used to simultaneously adjust the relative position of the second arc plate or the relative position of the third arc plate based on the first image when the cause of non-compliance is a control failure; it is also used to adjust any second arc plate and third arc plate based on the first image when the cause of non-compliance is a device failure.

[0010] Furthermore, the adjustment signal includes switching the packaging box size, and the server includes: The size calculation module is used to calculate the adjustment size based on the current size and the processing size, and to generate control signals. Both the current size and the processing size are the packaging box size.

[0011] Furthermore, the rule judgment module is used to judge the shape rules of each side in the initial image. When the shape of the side is not trapezoidal, it is judged as irregular; otherwise, it is judged as regular.

[0012] Furthermore, the shape matching module is used to perform shape matching on opposite sides in the first image when the shapes are all regular. When the matching degree of the opposite sides is greater than the preset matching threshold, the opposite sides are determined to be shape matched; otherwise, the opposite sides are determined to be shape mismatched.

[0013] Furthermore, the server also includes: The size recognition module is used to calculate the longitudinal distance between the two relative third arc plates and the lateral distance between the two relative second arc plates in the current image based on the first image when the reason for non-compliance is a control failure. The dimension calculation module is also used to calculate adjustment dimensions based on the machining dimensions, as well as the longitudinal and transverse distances, and to generate control signals.

[0014] Beneficial effects: The distance between the relatively positioned second arc-shaped plates is the horizontal dimension of the packaging box, and the distance between the relatively positioned third arc-shaped plates is the vertical dimension of the packaging box. By adjusting the relative positions of the second and third arc-shaped plates, the folding angle of the packaging box can be controlled, thus enabling the production of packaging boxes of different specifications.

[0015] The server is configured to adjust the second and third curved plates when switching packaging box specifications, thereby automatically calibrating the folding angle of the packaging box during production. Simultaneously, based on the initial image captured, image recognition and analysis are performed on the folded flat cardboard to perform secondary adjustments on the second and third curved plates, improving the accuracy of the automated adjustment of the packaging box folding angle. This automatic calibration, achieved while simultaneously improving the accuracy of the adjustment, facilitates subsequent processing of the flat cardboard. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the automatic folding angle calibration packaging box forming system of the present invention; Figure 2 This is a schematic diagram of the bottom plate adjustment mechanism in an embodiment of the automatic folding angle calibration packaging box forming system of the present invention; Figure 3 This is a top view of an embodiment of the automatic folding angle calibration packaging box forming system of the present invention; Figure 4 This is a front view of an embodiment of the automatic folding angle calibration packaging box forming system of the present invention; Figure 5 This is a side view of an embodiment of the automatic folding angle calibration packaging box forming system of the present invention; Figure 6 This is a logic block diagram of an embodiment of an automatic folding angle calibration packaging box forming system of the present invention. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: first arc plate 1, second arc plate 2, third arc plate 3, transmission base plate 401, base plate driver 402, fixed base plate 403, movable base plate 404, limiting plate 405, fixing plate 406, guide rod 407, mounting base plate 501, guide rail 502, mounting strip 503, notch 504, strip driver 601, guide strip hole 602, first driver 701, guide plate 702, second driver 801, and guide slider 802.

[0018] Example An automatic folding angle calibration packaging box forming system includes a second arc-shaped plate 2 and a third arc-shaped plate 3 arranged opposite to each other. The second arc-shaped plate 2 is used to control the lateral dimension of the packaging box, and the third arc-shaped plate 3 is used to control the longitudinal dimension of the packaging box. (See attached image) Figure 1 As shown, this solution is applied to the folding mechanism, longitudinal adjustment mechanism, transverse adjustment mechanism, and bottom plate adjustment mechanism in packaging box production and processing. The folding mechanism is used to fold the flat cardboard. The longitudinal adjustment mechanism is used to change the relative position of the first arc-shaped plate 1 and simultaneously change the relative position of the third arc-shaped plate 3. The transverse adjustment mechanism is used to change the relative position of the first arc-shaped plate 1 and simultaneously change the relative position of the second arc-shaped plate 2. Specifically: The folding mechanism includes a first arc plate 1, a second arc plate 2, and a third arc plate 3 that sequentially contact the flat cardboard. The tops of the first arc plate 1, the second arc plate 2, and the third arc plate 3 are curved. The tops of the first arc plate 1, the second arc plate 2, and the third arc plate 3 abut against the flat cardboard in sequence. The first arc plate 1, the second arc plate 2, and the third arc plate 3 enclose and form a box shape.

[0019] As attached Figure 2 As shown, the base plate adjustment mechanism is used to convey the folded flat cardboard. The base plate adjustment mechanism includes a conveying base plate 401, a base plate driver 402, a fixed base plate 403, a movable base plate 404, and two longitudinally arranged limiting plates 405. The limiting plates 405 are used to limit the folded flat cardboard. The two limiting plates 405 are fixedly connected to the fixed base plate 403 and the movable base plate 404, respectively. The base plate driver 402 is movably connected to the movable base plate 404, and the base plate driver 402 can drive the movable base plate 404 to move along the conveying trajectory of the folded flat cardboard.

[0020] A fixed base plate 403 is fixedly connected to a transmission base plate 401, and a movable base plate 404 is slidably connected to the transmission base plate 401. A base plate driver 402 is mounted on the transmission base plate 401. The base plate driver 402 is a motor, and the output shaft of the motor is fixedly connected to a base plate screw. The free end of the base plate screw passes through the movable base plate 404 and is rotatably connected to the fixed base plate 403. The movable base plate 404 is threadedly connected to the base plate screw. One limiting plate 405 is fixedly connected to the fixed base plate 403, and the other limiting plate 405 is fixedly connected to the movable base plate 404. To connect and enable the movement of the movable base plate 404, a fixed plate 406 is also provided on the transmission base plate 401. The fixed plate 406 is located between the base plate driver 402 and the movable base plate 404, meaning that the base plate screw also passes through the fixed plate 406 and is rotatably connected to the fixed plate 406. A guide rod 407 is also fixedly connected between the fixed plate 406 and the fixed base plate 403. The guide rod 407 passes through the movable base plate 404, and the axis of the guide rod 407 is parallel to the axis of the base plate screw and parallel to the conveying trajectory direction of the folded flat cardboard. In this embodiment, there are two guide rods 407, located on both sides of the base plate screw, so as to make the movable base plate 404 move stably. The motor rotates, driving the base plate screw to rotate. The movable base plate 404 is threadedly connected to the base plate screw. At the same time, the movable base plate 404 is restricted by the guide rod 407, so that the movable base plate 404 moves along the axis of the base plate screw, thereby changing the relative position between the two limiting plates 405.

[0021] The fixed base plate 403 and the movable base plate 404 are respectively provided with a supporting protrusion and a supporting groove on opposite sides. In this embodiment, the supporting groove is located on the side of the fixed base plate 403 facing the movable base plate 404 and is situated in the middle of that side. The supporting protrusion is located on the side of the movable base plate 404 facing the fixed base plate 403 and is situated in the middle of that side. The movable base plate 404 drives the supporting protrusion to move towards the supporting groove, allowing the tops of the fixed base plate 403 and the movable base plate 404 to contact the bottom of the folded flat cardboard. The provision of the supporting protrusion and the supporting groove can improve the support force provided to the folded flat cardboard when processing packaging boxes of different sizes, reducing the probability that the middle of the flat cardboard will be concave due to the excessive size of the processed packaging box, thus affecting the forming effect.

[0022] As attached Figure 3 , 4As shown, it also includes a mounting base plate 501. In use, the mounting base plate 501 is placed on the workbench of the existing equipment. There are two mounting base plates 501, and the space between the two mounting base plates 501 is used for conveying the folded flat cardboard. That is, the base plate adjustment mechanism is located between the two mounting base plates 501. Each mounting base plate 501 is fixedly connected to a guide rail 502. The guide rail 502 is perpendicular to the conveying trajectory of the folded flat cardboard. Each guide rail 502 is slidably connected to a mounting plate 503. The bottom of the mounting plate 503 has a guide groove that cooperates with the guide rail 502. The length direction of the mounting plate 503 is parallel to the conveying trajectory of the folded flat cardboard.

[0023] The lateral adjustment mechanism includes two plate drivers 601, which are respectively mounted on two mounting base plates 501. Each plate driver 601 is a motor with its output shafts facing each other. Each motor output shaft is fixedly connected to a plate screw, the axis of which is perpendicular to the conveying trajectory of the folded flat cardboard. The plate screw passes through the end of the mounting plate 503 and is threadedly connected to it. The mounting of the plate drivers 601 and the plate screws is conventional; for example, two mounting seats are provided, the motor output shaft passes through one mounting seat and is rotatably connected to it, and the end of the plate screw away from the motor is rotatably connected to the other mounting seat.

[0024] There are two second arc-shaped plates 2, which are arranged opposite each other. Each second arc-shaped plate 2 is fixedly connected to one side of each mounting strip 503. The tops of the two second arc-shaped plates 2 are curved in opposite directions from bottom to top and from the inside out. The motor rotates, driving the strip screw to rotate. The mounting strip 503 is threadedly connected to the strip screw, and simultaneously, the mounting strip 503 is restricted by the guide rail 502, causing it to move axially along the strip screw. This changes the relative position between the two mounting strips 503, thereby changing the relative position of the two second arc-shaped plates 2.

[0025] The longitudinal adjustment mechanism includes a front-end fixed structure and a rear-end moving structure. The front-end fixed structure is located on the conveying track of the folded flat cardboard and is positioned at one end of the two second arc-shaped plates 2. The rear-end moving mechanism is positioned on the two second arc-shaped plates 2. The length direction of the front-end fixed structure is perpendicular to the conveying track. The front-end fixed structure can rotate. After rotation, the length direction of the front-end fixed structure is parallel to the conveying track, and the front-end fixed structure is located below the conveying track.

[0026] Specifically, the front-end fixed structure includes two first drivers 701 arranged opposite to each other. The two first drivers 701 are respectively mounted on two mounting base plates 501. The first drivers 701 are motors, and the output shafts of the motors are arranged opposite to each other. The output shafts of the motors are fixedly connected to transmission rods, and the free ends of the transmission rods pass through the mounting strips 503. There are four first arc-shaped plates 1, and three third arc-shaped plates 3 are fixedly connected to each of the four first arc-shaped plates 1. Two of the first arc-shaped plates 1 are connected to the front-end fixed structure, and the other two first arc-shaped plates 1 are connected to the rear-end moving structure.

[0027] Two first actuators 701 are respectively connected to two first arc-shaped plates 1, that is, the transmission rod passes through one end of the mounting strip 503 and is fixedly connected to the bottom of the first arc-shaped plate 1. The top of the first arc-shaped plate 1 fixedly connected to the first actuator 701 is bent from bottom to top and from the inside to the outside in opposite directions. Each of the two mounting strips 503 has a notch 504 on its opposite side, which connects the top and bottom surfaces of the mounting strip 503 and allows the top of the first arc-shaped plate 1 to pass through. The opposite sides of the two first arc-shaped plates 1 are respectively fixedly connected to two third arc-shaped plates 3, that is, the third arc-shaped plates 3 are fixedly connected to the side of the first arc-shaped plates 1 away from the first actuator 701, and the top of the two third arc-shaped plates 3 is bent from bottom to top from the rear moving structure towards the front fixed structure.

[0028] As attached Figure 5 As shown, two first arc-shaped plates 1 are respectively fixedly connected to guide plates 702. The guide plates 702 are located on the side of the first arc-shaped plates 1 that are far apart from each other, and the end of the guide plate 702 facing the second arc-shaped plate 2 has a rounded corner. The rounded corner is designed to prevent interference between the guide plate 702 and the second arc-shaped plate 2 when the first arc-shaped plates 1 rotate. The opposite side of the two guide plates 702 is flush with the opposite side of the two second arc-shaped plates 2, and the side of the two third arc-shaped plates 3 facing the rear moving structure is flush.

[0029] The first driver 701 can drive the first arc plate 1 to rotate. The guide plate 702 is used to limit the folded flat cardboard in conjunction with the limiting plate 405 when the bottom plate adjustment mechanism conveys it. In the initial state, the length direction of the first arc plate 1 and the second arc plate 2 is perpendicular to the conveying trajectory. After the first driver 701 drives the first arc plate 1 to rotate, the length direction of the first arc plate 1 and the second arc plate 2 is parallel to the conveying trajectory. The notch 504 is set to avoid interference between the top of the first arc plate 1 and the mounting strip 503 after the first arc plate 1 rotates. The guide plate 702 is used to limit the folded flat cardboard in conjunction with the limiting plate 405 when the bottom plate adjustment mechanism conveys it.

[0030] The rear-end moving structure includes second drivers 801 respectively disposed on two second arc-shaped plates 2. Each second arc-shaped plate 2 has guide strip holes 602, the length direction of which is parallel to the conveying trajectory of the folded flat cardboard. Each arc-shaped plate has two guide strip holes 602, and the two guide strip holes 602 are arranged in parallel.

[0031] Each of the second actuators 801 is movably connected to a guide slider 802. Specifically, the two second actuators 801 are respectively installed on opposite sides of the two second arc-shaped plates 2. The second actuators 801 are motors, and the output shafts of the motors are arranged in parallel. A slider screw is fixedly connected to each motor output shaft. The slider screw passes through the guide slider 802 and is threadedly connected to the guide slider 802. The axial direction of the slider screw is parallel to the length direction of the guide bar hole 602. The installation of the second actuators 801 and the slider screw is existing technology; for example, two mounting seats are provided. The output shaft of the motor passes through one mounting seat and is rotatably connected to that mounting seat. The end of the slider screw away from the motor is rotatably connected to the other mounting seat.

[0032] The guide slider 802 passes through the guide strip hole 602, and one end of the guide slider 802 is fixedly connected to the two first arc-shaped plates 1. Specifically, the guide slider 802 has two slider protrusions on the side facing the second arc-shaped plate 2. The ends of the two slider protrusions away from the guide slider 802 pass through the two guide strip holes 602 respectively, and are slidably connected to the two guide strip holes 602 respectively. The ends of the two slider protrusions away from the guide slider 802 are fixedly connected to the other two first arc-shaped plates 1, that is, the two first arc-shaped plates 1 are located on opposite sides of the second arc-shaped plate 2. The tops of the two first arc-shaped plates 1 are bent outwards and backwards from bottom to top by the base plate adjustment mechanism.

[0033] Two first arc-shaped plates 1 are fixedly connected to two other third arc-shaped plates 3 on opposite sides, that is, the third arc-shaped plates 3 are fixedly connected to the side of the first arc-shaped plates 1 away from the second arc-shaped plates 2. The tops of the two third arc-shaped plates 3 are bent from bottom to top from the front fixed structure towards the rear moving structure. That is, the tops of the third arc-shaped plates 3 in the front fixed structure and the third arc-shaped plates 3 on the same side in the rear moving structure are bent away from each other from bottom to top, while the first arc-shaped plates 1 in the front fixed structure and the first arc-shaped plates 1 on the same side in the rear moving structure are flush with the side facing the bottom plate adjustment mechanism.

[0034] The second actuator 801 drives the first arc plate 1 to move along the length direction of the guide strip hole 602. The second actuator 801 drives the slider screw to rotate. The guide slider 802 is threadedly connected to the slider screw. The guide slider 802 is constrained by the guide strip hole 602 and moves along the length direction of the guide strip hole 602 when the slider screw rotates, that is, it moves along the conveying trajectory of the folded flat cardboard. The movement of the guide slider 802 drives the two first arc plates 1 and the two third arc plates 3 of the rear moving structure to move along the length direction of the guide strip hole 602, thereby adjusting their relative positions with the two first arc plates 1 and the two third arc plates 3 in the front fixed structure.

[0035] In use, the folding mechanism, longitudinal adjustment mechanism, transverse adjustment mechanism, and bottom plate adjustment mechanism are all properly adjusted. The existing adsorption mechanism adsorbs the flat cardboard that has been pressed along the creases, moving the cardboard above the folding mechanism and pressing it down. During the pressing process, the side tabs of the cardboard contact the first arc plate 1 and bend under force. Subsequently, the opposite left and right sides of the cardboard contact the second arc plate 2 and bend under force, simultaneously causing the connected side tabs to fold. Finally, the opposite front and rear sides of the cardboard contact the third arc plate 3 and bend under force until the cardboard comes into contact with the bottom plate adjustment mechanism. At this point, the four sides and side tabs of the cardboard are folded along the crease lines, and the cardboard is constrained by the limiting plate 405 and the second arc plate 2 to maintain the shape of the box. The first arc plate 1, connected to the front fixing structure, rotates. With the cooperation of the bottom plate adjustment mechanism and the guide plate 702, the cardboard is constrained by the limiting plate 405 and the guide plate 702, maintaining the shape of the box as it moves to the next process.

[0036] An automatic folding angle calibration packaging box forming system, as shown in the attached figure. Figure 6 As shown, it includes a server used to acquire adjustment signals and adjust the relative positions of the second arc-shaped plate 2 and / or the third arc-shaped plate 3 according to the adjustment signals. Specifically: The adjustment signals include switching the packaging box size, and the server includes a storage module and a size calculation module.

[0037] The storage module stores a packaging box record table, which records the dimensions of the processed packaging boxes. These dimensions include the length and width of the box, i.e., its dimensions in the longitudinal and transverse directions. For ease of distinction, the currently processed packaging box dimension is defined as the current dimension, and the next processed packaging box dimension is defined as the processing dimension. Both the current dimension and the processing dimension are packaging box dimensions; therefore, the adjustment signal includes the processing dimension.

[0038] The dimension calculation module is used to calculate the adjustment dimension based on the current dimension and the machining dimension, and generate control signals. The adjustment dimension includes single-sided and double-sided dimensions, and the calculation formula is as follows: (1) (2) In equations (1) and (2), This is a one-sided dimension. This refers to the longitudinal dimension of the processing dimensions, i.e., the length of the packaging box. This is the current dimension in the vertical direction. It is a two-sided size. This refers to the horizontal dimension of the processing dimensions, i.e., the width of the packaging box. This is the current dimension in the horizontal direction. The calculation result includes a sign and a value. The sign "-" indicates that the relative position of the corresponding structure is reduced, and the sign "+" indicates that the relative position of the corresponding structure is increased. The value indicates the specific change in the relative position of the corresponding structure.

[0039] The control signals include a longitudinal control signal generated based on a single-sided dimension and a lateral control signal generated based on both-sided dimensions. The server controls the relative position of the third arc-shaped plate 3 and the relative position of the limiting plate 405 based on the longitudinal control signal, and controls the relative position of the second arc-shaped plate 2 based on the lateral control signal. Specifically: the base plate adjustment mechanism controls the relative position of the limiting plate 405 based on the longitudinal control signal, i.e., it activates the base plate driver 402 and controls the moving base plate 404 to move away from or closer to the fixed base plate 403 based on the longitudinal control signal. For example, if the single-sided dimension is "-2" cm, then the moving base plate 404 is moved 2 cm towards the fixed base plate 403, i.e., the relative position of the two limiting plates 405 is reduced by 2 cm. Similarly, the longitudinal adjustment mechanism controls the relative position of the rear moving structure and the front fixed structure based on the longitudinal control signal, i.e., it activates the two second drivers 801 and controls the rear moving structure to move away from or closer to the front fixed structure based on the longitudinal control signal, changing the relative position of the third arc-shaped plate 3 of the rear moving structure and the third arc-shaped plate 3 of the front fixed structure.

[0040] The lateral adjustment mechanism controls the relative position of the second arc-shaped plates 2 according to the lateral control signal. That is, it simultaneously activates two plate drivers 601, and controls the two second arc-shaped plates 2 to move relative to each other or away from each other according to the lateral control signal. For example, if the bilateral dimension is "-3" cm, then the two second arc-shaped plates 2 are controlled to move relative to each other by 3 cm, that is, the relative position of the two second arc-shaped plates 2 decreases by 6 cm; conversely, if the bilateral dimension is "3" cm, its sign is "+", then the two second arc-shaped plates 2 are controlled to move away from each other by 3 cm, that is, the relative position of the two second arc-shaped plates 2 increases by 6 cm.

[0041] When switching packaging box specifications, the server controls the vertical adjustment mechanism to change the relative position of the third arc plate 3 according to the adjustment signal, thereby changing the vertical dimension of the box shape formed by the enclosure. Simultaneously, it controls the bottom plate adjustment mechanism to change the relative position of the two limit plates 405; and controls the horizontal adjustment mechanism to change the relative position of the second arc plate 2, thereby changing the horizontal dimension of the box shape formed by the enclosure, so as to realize the automatic switching of packaging box specifications.

[0042] The server is also used to acquire the first image of the folded flat cardboard after the relative positions of the second curved plate 2 and / or the third curved plate 3 change. Based on the first image, it determines whether the adjustment of the second curved plate 2 and / or the third curved plate 3 is qualified. If not, it readjusts the relative positions of the second curved plate 2 and / or the third curved plate 3 based on the first image. The server is also used to simultaneously adjust the relative position of the second curved plate 2, or the relative position of the third curved plate 3, based on the first image when the reason for the failure is an adjustment malfunction; and to adjust any second curved plate 2 and the third curved plate 3 based on the first image when the reason for the failure is an equipment malfunction. Specifically: It also includes an image acquisition unit, which uses an industrial camera. The image acquisition unit is located on top of the folding mechanism, longitudinal adjustment mechanism, lateral adjustment mechanism, and bottom plate adjustment mechanism, and is situated on the longitudinal central axis of the lateral adjustment mechanism; that is, the image acquisition unit is equidistant from the two second arc-shaped plates 2. The image acquisition unit is used to capture the initial image and send it to the server. The initial image includes the bottom surface and four sides of the folded flat cardboard. The server also includes a rule judgment module, a shape matching module, a tilt judgment module, a fault analysis module, and a size recognition module.

[0043] The rule judgment module is used to judge the shape rule of each side in the initial image. The shape rule refers to the shape of each side in the initial image being trapezoidal. When the shape of the side is not trapezoidal, it is judged as irregular; otherwise, it is judged as regular.

[0044] The shape matching module is used to perform shape matching on opposite sides in the initial image when all shapes are regular. Opposite sides refer to the left and right sides of the folded flat cardboard. If the matching degree of opposite sides is greater than a preset matching threshold, the opposite sides are determined to be shape-matched; otherwise, they are determined to be shape-mismatched. For example, calculating the matching degree of the left and right sides, if the matching degree of the left and right sides is greater than the matching threshold, the opposite sides are determined to be shape-mismatched. The matching threshold is set by those skilled in the art according to the application scenario requirements.

[0045] The tilt determination module calculates the tilt angle for each side in the initial image when all shapes match, and determines whether the tilt angle meets the preset standard tilt angle range. When the tilt angle meets the standard tilt angle range, the adjustment of the folding mechanism is deemed qualified. A preset height distance from the image acquisition end to the top of the fixed base plate 403 is provided. When calculating the tilt angle, the height distance and the lengths of the upper and lower bases of the side shape are used. The side shape is trapezoidal; the difference between the upper and lower bases of the trapezoid, combined with the height distance, allows the calculation of the tilt angle of the corresponding side. The tilt angle of each side is calculated sequentially, and the tilt angle of each side is determined sequentially to meet the standard tilt angle range.

[0046] When the rule judgment module determines that the shape of any side is irregular, or the shape matching module determines that the shape of the opposite side is mismatched, or the tilt judgment module determines that the tilt of any side exceeds the standard tilt range, the fault analysis module is used to determine that the adjustment of the folding mechanism is unqualified and generate the reasons for the unqualified. The reasons for the unqualified include adjustment faults, equipment faults and other faults.

[0047] When any side has an irregular shape, the fault analysis module will determine the cause of failure by combining the shapes of other sides. If both the left and right sides are irregular, the fault analysis module will generate a failure reason for the control fault. If only the left or right side is irregular, the fault analysis module will generate a failure reason for the equipment fault. If either the front or rear side is irregular, the fault analysis module will generate a failure reason for other faults.

[0048] When the shapes of the opposite sides do not match, the fault analysis module generates the reasons for the equipment failure.

[0049] When the tilt of any side exceeds the standard tilt range, the tilt of other sides is considered for judgment. If the tilt of both the left and right sides exceeds the standard tilt range, and the difference in tilt between the left and right sides is within the allowable range, the fault analysis module generates a non-compliance reason for the control fault. If the tilt of both the left and right sides exceeds the standard tilt range, and the difference in tilt between the left and right sides exceeds the allowable range, or if only the tilt of the left or right side exceeds the standard tilt range, the fault analysis module generates a non-compliance reason for the equipment fault. If the tilt of either the front or rear side exceeds the standard tilt range, the fault analysis module generates a non-compliance reason for other faults. Equipment control and image detection operations will have errors; therefore, allowable ranges are set for error tolerance.

[0050] The server is also used to adjust the relative position of the second arc plate 2 or the third arc plate 3 simultaneously based on the first image when the cause of non-conformity is a control malfunction. Specifically, the size recognition module is used to calculate the longitudinal distance between the two third arc plates 3 and the lateral distance between the two second arc plates 2 in the current image when the cause of non-conformity is a control malfunction. The size calculation module is also used to calculate the adjustment size based on the processing size, as well as the longitudinal and lateral distances, and generate a control signal. At this time, the control signal is used to control the movement of the second arc plate 2 simultaneously, changing its relative position, and the relative position of the first arc plate 1, or to control the movement of the third arc plate 3 simultaneously, changing its relative position.

[0051] The longitudinal distance is the vertical dimension relative to the two third arc-shaped plates 3, which is the longitudinal dimension of the produced packaging box at this point. However, due to improper adjustment, the size of the produced packaging box differs from the expected size. The longitudinal distance and the processing dimension in the longitudinal direction are recalculated, and adjustments are made again based on the calculation results. Similarly, the transverse distance is the horizontal dimension relative to the second arc-shaped plate 2, which is the transverse dimension of the produced packaging box at this point. By adjusting the relative distance between the two third arc-shaped plates 3 and the relative distance between the two third arc-shaped plates 3 in a secondary adjustment, the produced packaging box reaches the processing size.

[0052] The server is also used to adjust any second arc plate 2 and third arc plate 3 based on the initial image when the reason for non-conformity is equipment failure. Specifically, the size recognition module is used to calculate the longitudinal distance between two relative third arc plates 3 and the lateral distance between two relative second arc plates 2 in the current image when the reason for non-conformity is equipment failure, based on the initial image. The size calculation module is also used to calculate the adjustment size based on the processing size, as well as the longitudinal and lateral distances, and generate a control signal. At this time, the control signal controls any second arc plate 2 to move, changing the relative position of the two second arc plates 2 and the relative position of the two first arc plates 1, or controls any third arc plate 3 to move, changing the relative position of the two third arc plates 3. Those skilled in the art can set a threshold for the number of adjustment times, for example, a threshold of three. For the same processing size, when the reason for non-conformity is adjustment failure or equipment failure, the size recognition module counts the number of times the longitudinal or lateral distance is calculated. If the count exceeds the threshold for the number of adjustment times, an alarm signal is generated to remind the staff that the equipment is abnormal and needs to be stopped for maintenance. The threshold for the number of adjustments is reset to zero when the adjustment of the folding mechanism is deemed satisfactory based on the initial image.

[0053] After the packaging box specifications are switched, an initial image is captured when the first airplane box is folded. This initial image is used to determine if the folded shape of the airplane box is acceptable, thereby determining whether the first arc plate 1, the second arc plate 2, and the third arc plate 3 are properly adjusted, i.e., whether the folding mechanism is properly adjusted. If acceptable, production of airplane boxes continues. If unacceptable, the folding mechanism is readjusted until the folded shape of the airplane box is acceptable or the number of adjustments reaches the control threshold. This solution uses image recognition and analysis of the folded flat cardboard based on the acquired initial image to perform secondary adjustments on the second arc plate 2 and the third arc plate 3, improving the accuracy of automated adjustment of the packaging box folding angle. While achieving automated adjustment, it also improves the accuracy of adjustment, thus achieving automatic calibration and facilitating subsequent production processes of the flat cardboard.

[0054] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A folding angle auto-calibration packaging box forming system, characterized in that: The server is configured to obtain an adjustment signal, and adjust the relative positions of the second arc-shaped plate and / or the third arc-shaped plate according to the adjustment signal; and further configured to collect a first image of the folded flat paperboard after the relative positions of the second arc-shaped plate and / or the third arc-shaped plate are changed, determine whether the adjustment of the second arc-shaped plate and / or the third arc-shaped plate is qualified according to the first image, and readjust the relative positions of the second arc-shaped plate and / or the third arc-shaped plate according to the first image when the adjustment is unqualified. The first image includes the bottom surface and four side surfaces of the folded flat paperboard, and the server includes:

2. The folding angle automatic calibration packaging box forming system according to claim 1, characterized in that: a rule determination module configured to determine the shape of each side surface in the first image; a shape matching module configured to match the shapes of the opposite side surfaces in the first image when the shapes of the side surfaces are regular; an inclination determination module configured to calculate the inclination of each side surface in the first image when the shapes of the side surfaces are matched, and determine whether the inclination meets a preset standard inclination range; and determine that the adjustment is qualified when the inclination meets the standard inclination range. When the rule determination module determines that the shape of any side surface is irregular, or the shape matching module determines that the shapes of the opposite side surfaces are not matched, or the inclination determination module determines that the inclination of any side surface exceeds the standard inclination range, the server is further configured to determine that the adjustment is unqualified, and generate an unqualified reason, the unqualified reason including a control failure, a device failure, and other failures.

3. The folding angle automatic calibration packaging box forming system according to claim 2, characterized in that: When the unqualified reason is the control failure, the server is further configured to simultaneously adjust the relative positions of the second arc-shaped plates according to the first image, or simultaneously adjust the relative positions of the third arc-shaped plates according to the first image; and when the unqualified reason is the device failure, the server is further configured to adjust any second arc-shaped plate and third arc-shaped plate according to the first image.

4. The folding angle automatic calibration packaging box forming system according to claim 3, characterized in that: The adjustment signal includes a switched package size, and the server includes:

5. The folding angle automatic calibration packaging box forming system according to claim 4, characterized in that: a size calculation module configured to calculate an adjustment size according to a current size and a processing size, and generate a control signal, the current size and the processing size both being the package size. The rule determination module is configured to determine the shape of each side surface in the first image, and determine that the shape is irregular when the shape of the side surface is a non-trapezoidal shape, and vice versa.

6. The folding angle automatic calibration packaging box forming system according to claim 5, characterized in that: The shape matching module is configured to match the shapes of the opposite side surfaces in the first image when the shapes of the side surfaces are regular, and determine that the shapes of the opposite side surfaces are matched when a matching degree of the opposite side surfaces is greater than a preset matching threshold, and vice versa.

7. The folding angle automatic calibration packaging box forming system according to claim 6, characterized in that: The server further includes:

8. The folding angle automatic calibration packaging box forming system according to claim 7, characterized in that: a size identification module configured to calculate a longitudinal distance between the opposite third arc-shaped plates and a lateral distance between the opposite second arc-shaped plates in a current image according to the first image when the unqualified reason is the control failure; the size calculation module is further configured to calculate the adjustment size according to the processing size, the longitudinal distance, and the lateral distance, and generate the control signal. ​

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