Flat-to-flat die cutting and stamping equipment and related methods

Abstract

This application relates to the field of die-cutting and hot stamping technology, and provides a flatbed die-cutting and hot stamping equipment and related methods. The cardboard posture adjustment method includes: acquiring a posture image through an image acquisition device; obtaining an analysis image based on the posture image; wherein, the analysis image reflects the relative positional relationship of the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, the active area corresponding to each adjusting wheel, and the waste removal hole projected onto a plane parallel to the cardboard surface; obtaining control information based on the analysis image; wherein, the control information is used to control the rotational speed of the adjusting wheels. The flatbed die-cutting and hot stamping equipment provided by this application can improve the technical problem in related technologies where the posture of the die-cut cardboard tilts or deflects during transportation, which affects the product processing accuracy, finished product yield, and production efficiency during the waste removal process.

Description

Technical Field

[0001] This application relates to the field of die-cutting and hot stamping technology, and in particular to a flatbed die-cutting and hot stamping equipment and related methods. Background Technology

[0002] In the packaging and printing industries, flatbed die-cutting and hot stamping equipment is widely used in the processing of high-end paper products such as gift boxes, cigarette packs, and cosmetic boxes because it can simultaneously perform hot stamping decoration and die-cutting. Existing equipment typically consists of a hot stamping unit, a die-cutting unit, a waste removal unit, and a conveying unit arranged sequentially along the processing direction. After hot stamping and die-cutting, the cardboard is conveyed to the waste removal unit, where waste is removed through waste removal holes to separate the finished product from the waste.

[0003] However, in actual production, die-cut cardboard (especially irregularly shaped, multi-layer composite cardboard or high-precision products) is prone to tilting or deflection during the conveying process due to factors such as uneven friction of the conveyor belt, shift of the cardboard's center of gravity, and release of interlayer stress. This causes misalignment between the waste material position on the cardboard and the waste removal hole of the waste removal device. Existing conveying devices often lack precise posture adjustment functions or can only achieve simple guiding and limiting, making it difficult to ensure that the waste center and the waste removal hole center are collinear in the processing direction. This leads to problems such as incomplete waste removal, waste residue, scratches on the finished product surface or scratches on the hot stamping layer, affecting product processing accuracy, finished product yield and production efficiency. Summary of the Invention

[0004] This application provides a flatbed die-cutting and hot stamping equipment and related methods, which can improve the technical problems existing in the related technology where the die-cut cardboard tilts or deflects during transportation, which affects the product processing accuracy, finished product yield and production efficiency during the waste removal process.

[0005] In a first aspect, embodiments of this application provide a flatbed die-cutting and hot stamping equipment, including a frame and a hot stamping section, wherein the hot stamping section is disposed on the frame and is used for hot stamping paperboard; the flatbed die-cutting and hot stamping equipment further includes: The die-cutting unit, located on the frame, is used to receive the cardboard output from the hot stamping unit and to die-cut the cardboard. A conveying and adjusting unit, mounted on the frame, is used to receive the die-cut cardboard output from the die-cutting unit, convey the cardboard along the processing direction, and adjust the orientation of the cardboard; and The waste removal section is installed on the frame and has a waste removal hole. The waste removal section is used to receive the cardboard output by the conveying adjustment section and remove the waste material on the cardboard through the waste removal hole to separate the finished cardboard from the waste material. The conveying adjustment unit adjusts the posture of the cardboard so that the center of the waste material to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the processing direction.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: The flatbed die-cutting and hot stamping equipment provided in this application embodiment receives the hot-stamped cardboard from the hot stamping section in the die-cutting part, completing the die-cutting process and providing cardboard with a preset waste area for the subsequent waste removal process. The conveying and adjusting part receives the die-cut cardboard and adjusts its posture while stably conveying it along the processing direction. This corrects any tilting or deflection caused by uneven friction or center of gravity shift during conveying, ensuring that the center of the waste to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the waste removal part in the processing direction, laying the foundation for accurate waste removal. The waste removal part receives the cardboard after posture adjustment and removes the accurately aligned waste through the waste removal hole, achieving separation of the finished cardboard and waste. This improves problems such as incomplete waste removal and finished product damage, ensuring product processing accuracy and yield.

[0007] Secondly, embodiments of this application provide a method for adjusting the posture of cardboard, applied to the flatbed die-cutting and hot stamping equipment described in the first aspect, the method comprising: An attitude image is acquired through an image acquisition device; wherein, the attitude image reflects the attitude of the cardboard before it enters the adjustment device and the position of the cardboard on the conveying device, and the attitude image includes the cardboard and waste material marked on the cardboard that needs to be removed; An analysis image is obtained based on the posture image; wherein, the analysis image reflects the relative positional relationship of the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, the active area corresponding to each adjusting wheel, and the waste removal hole projected onto a plane parallel to the surface of the cardboard; Control information is obtained based on the analyzed image; wherein, the control information is used to control the rotational speed of the regulating wheel.

[0008] The technical solutions described in this application embodiment have at least the following technical effects: The device acquires posture images to gather the posture and position information of the cardboard before it enters the adjustment device, capturing the tilt / deflection state of the cardboard and the specific position of the waste to be removed, providing reliable data support for subsequent posture analysis and adjustment. Then, an analysis image is generated based on the posture image, projecting the cardboard, waste, adjustment wheel, moving area, and waste removal hole onto the same plane to establish the relative positional relationship of each component. This eliminates judgment errors caused by spatial dimensional differences and provides an analytical basis for determining the fit position of the adjustment wheel and the cardboard, and the alignment deviation between the waste and the waste removal hole. Finally, control information is generated based on the analysis image. By combining the relative positional relationship, the speed adjustment command of the adjustment wheel is calculated. By controlling the speed difference of the adjustment wheel, the posture of the cardboard is corrected, ensuring that the center of the waste and the center of the waste removal hole are collinear in the processing direction. This improves problems such as incomplete waste removal and finished product damage caused by posture deviation, ensuring processing accuracy and yield. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the flatbed die-cutting and hot stamping equipment provided in the embodiments of this application; Figure 2 A schematic diagram of the structure of the conveying adjustment section provided in the embodiments of this application; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 A schematic flowchart illustrating the cardboard posture adjustment method provided in this application embodiment; Figure 5 A flowchart illustrating step S200 in the cardboard posture adjustment method provided in this application embodiment; Figure 6 A flowchart illustrating step S300 in the cardboard posture adjustment method provided in this application embodiment.

[0011] The following are the labeling elements in the figure: 100. Flatbed die-cutting and hot stamping equipment; 10. Frame; 20. Die-cutting section; 30. Conveying and adjusting section; 31. Conveying device; 32. Adjusting device; 321. Lateral drive mechanism; 3211. Lateral drive component; 3212. Lateral drive rod; 322. Adjusting mechanism; 3221. Support platform; 3222. Adjusting drive component; 3223. Adjusting wheel; 33. Image acquisition device; 40. Waste removal section. Detailed Implementation

[0012] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0014] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0015] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0017] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0018] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0019] In the packaging and printing industries, flatbed die-cutting and hot stamping equipment is widely used in the processing of high-end paper products such as gift boxes, cigarette packs, and cosmetic boxes because it can simultaneously perform hot stamping decoration and die-cutting. Existing equipment typically consists of a hot stamping unit, a die-cutting unit, a waste removal unit, and a conveying unit arranged sequentially along the processing direction. After hot stamping and die-cutting, the cardboard is conveyed to the waste removal unit, where waste is removed through waste removal holes to separate the finished product from the waste.

[0020] However, in actual production, die-cut cardboard (especially irregularly shaped, multi-layer composite cardboard or high-precision products) is prone to tilting or deflection during the conveying process due to factors such as uneven friction of the conveyor belt, shift of the cardboard's center of gravity, and release of interlayer stress. This causes misalignment between the waste material position on the cardboard and the waste removal hole of the waste removal device. Existing conveying devices often lack precise posture adjustment functions or can only achieve simple guiding and limiting, making it difficult to ensure that the waste center and the waste removal hole center are collinear in the processing direction. This leads to problems such as incomplete waste removal, waste residue, scratches on the finished product surface or scratches on the hot stamping layer, affecting product processing accuracy, finished product yield and production efficiency.

[0021] Based on this, in order to improve the technical problem in the related technology that the die-cut cardboard tilts or deflects during transportation, which affects the product processing accuracy, finished product yield and production efficiency during the waste removal process, the embodiments of this application provide the following solutions.

[0022] Please see Figure 1 This application provides a flatbed die-cutting and hot stamping equipment 100, including a frame 10 and a hot stamping section. The hot stamping section is disposed on the frame 10 and is used to hot stamp paper. The flatbed die-cutting and hot stamping equipment 100 also includes a die-cutting section 20, a conveying and adjusting section 30, and a waste removal section 40, wherein: The die-cutting section 20 is mounted on the frame 10 and is used to receive the cardboard output from the hot stamping section and to die-cut the cardboard.

[0023] The conveying adjustment unit 30 is mounted on the frame 10 and is used to receive the die-cut cardboard output from the die-cutting unit 20, convey the cardboard along the processing direction, and adjust the posture of the cardboard.

[0024] The waste removal unit 40 is installed on the frame 10 and has a waste removal hole. The waste removal unit 40 is used to receive the cardboard output by the conveying adjustment unit 30 and remove the waste material on the cardboard through the waste removal hole to separate the finished cardboard from the waste material.

[0025] The conveying adjustment unit 30 adjusts the posture of the paperboard so that the center of the waste material to be removed on the paperboard is collinear with the center of the corresponding waste removal hole in the processing direction.

[0026] It is understood that the frame 10 is the basic support unit of the equipment, used to fix the hot stamping section, die-cutting section 20, conveying and adjusting section 30, and waste removal section 40, and to prevent positional displacement caused by vibration during operation. For example, the material of the frame 10 can be aluminum alloy, copper alloy, etc., but is not limited to these.

[0027] A hot stamping section is a device that can create hot stamping patterns on the surface of cardboard. For example, a hot stamping section can be a flatbed hot stamping machine, a rotary hot stamping machine, or a rotary hot stamping machine driven by a servo motor, but it is not limited to these.

[0028] The die-cutting section 20 is used to receive the cardboard output from the hot stamping section and complete the die-cutting process for the product outline and waste area. For example, the die-cutting section 20 can be a hydraulically driven flatbed die-cutting machine, a motor-driven rotary die-cutting machine, etc., but is not limited to these.

[0029] The conveying adjustment unit 30 is a device capable of receiving the die-cut cardboard output from the die-cutting unit 20 and conveying it to the waste removal unit 40 along the processing direction. During conveying, it changes the orientation of the cardboard so that the center of the waste material to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the processing direction. For example, the conveying adjustment unit 30 may include a conveying device (synchronous belt conveyor, vacuum suction conveyor, etc.) and multiple cylinders (double-acting cylinders, straight rod cylinders, etc.), but is not limited to these. The conveying device can be mounted on the frame 10 to receive and convey the cardboard along the processing direction. The cylinders can be symmetrically distributed on both sides of the conveyor belt to abut against the sides of the cardboard and drive it to move, thereby changing the orientation of the cardboard.

[0030] The waste removal section 40 is used to receive the cardboard for attitude calibration and to separate the finished product from the waste. For example, the waste removal section 40 can be a pneumatic ejector type waste removal machine or a roller pressing type waste removal machine, and can also include a waste removal plate (copper plate, aluminum plate, etc.) and a pneumatic ejector (double-acting cylinder with rubber head, straight rod cylinder, etc.), but is not limited to these. The waste removal plate can be set on the frame 10 and has a waste removal hole for receiving the cardboard for attitude calibration; the pneumatic ejector can be set on the frame 10 and located above the waste removal hole for ejecting the waste material located above the waste removal hole through the waste removal hole so as to separate the waste material from the finished cardboard.

[0031] As can be seen from the above, the flatbed die-cutting and hot stamping equipment 100 provided in this application embodiment receives the hot-stamped cardboard output from the hot stamping section through the die-cutting section 20, completes the die-cutting and forming process, and provides cardboard with a preset waste area for the subsequent waste removal process. The conveying adjustment section 30 receives the die-cut cardboard and adjusts its posture while stably conveying the cardboard along the processing direction. This corrects the tilting or deflection of the cardboard caused by uneven friction and center of gravity shift during the conveying process, ensuring that the center of the waste to be removed on the cardboard is collinear with the center of the corresponding waste removal hole of the waste removal section 40 in the processing direction, laying the foundation for accurate waste removal. The waste removal section 40 receives the cardboard after posture adjustment and removes the accurately aligned waste through the waste removal hole, realizing the separation of the finished cardboard and waste, improving problems such as incomplete waste removal and finished product damage, and ensuring product processing accuracy and yield.

[0032] In some embodiments, please refer to the following: Figure 2 and Figure 3 The conveying and adjusting unit 30 includes a conveying device 31, two adjusting devices 32, and an image acquisition device 33.

[0033] The conveying device 31 is mounted on the frame 10 and is used to receive the die-cut cardboard output from the die-cutting unit 20 and convey the cardboard to the waste removal unit 40 along the processing direction.

[0034] Two adjusting devices 32 are mounted on the frame 10 and are used to engage with the paperboard conveyed by the conveying device 31 through friction transmission. The paperboard is rotated by the speed difference between the two adjusting devices 32, thereby adjusting the posture of the paperboard.

[0035] The image acquisition device 33 is mounted on the frame 10 and close to the adjustment device 32, and is used to acquire an image of the cardboard posture before it enters the adjustment device 32.

[0036] It is understood that the conveying device 31 is a device capable of receiving the cardboard with waste material output from the die-cutting section 20 and conveying it to the waste removal section 40 at a uniform speed and smoothly along the processing direction. The input end of the conveying device 31 can be precisely connected to the output end of the die-cutting section 20, and the output end can be precisely connected to the feed port of the waste removal section 40. For example, the conveying device 31 can be a synchronous belt conveyor, a vacuum adsorption conveyor, etc., but is not limited to these.

[0037] The adjusting device 32 is a device that can drive the cardboard to rotate by frictional contact with the cardboard and by utilizing the speed difference between the two adjusting devices 32, thereby correcting the tilt and deflection posture deviation of the cardboard. The two adjusting devices 32 can be symmetrically arranged on both sides of the conveying device 31. For example, the adjusting device 32 can be a rubber wheel driven by a servo motor, and the rotation of the cardboard can be achieved by the speed difference between the two rubber wheels. It can also be a double-acting cylinder, which directly pushes one side of the cardboard to achieve the rotation of the cardboard, etc., but is not limited to these.

[0038] The image acquisition device 33 is a device that acquires images of the cardboard's posture in real time before it enters the adjustment device 32, clearly capturing feature information such as the cardboard's edge contour and positioning marks, providing quantitative data for posture adjustment. The shooting direction of the image acquisition device 33 can be perpendicular to the surface of the cardboard. For example, the image acquisition device 33 can be a CCD camera, a CMOS camera, a black and white camera, etc., but is not limited to these.

[0039] With this setup, the die-cut cardboard is conveyed at a constant speed by the conveyor 31. When the cardboard is about to enter the adjusting device 32 or is completely output from the die-cutting device, the image acquisition device 33 starts capturing a real-time posture image of the cardboard. Based on control commands obtained from the real-time posture image of the cardboard, the two adjusting devices 32 set different rotation speed parameters to create a speed difference. When the cardboard contacts the adjusting device 32, it drives the cardboard to rotate, changing its posture so that the center of the waste material to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the processing direction. The cardboard, having completed posture calibration, continues to be conveyed by the conveyor 31 to the waste removal section 40 to complete the separation of waste material from the finished cardboard.

[0040] In some embodiments, please refer to the following: Figure 2 and Figure 3 The frame 10 has multiple moving slots perpendicular to the processing direction, and the adjustment device 32 includes a transverse drive mechanism 321 and two adjustment mechanisms 322.

[0041] The lateral drive mechanism 321 is mounted on the frame 10.

[0042] Two adjustment mechanisms 322 are movably mounted on the transverse drive mechanism 321 and are located on the upper and lower sides of the processing direction along the direction of gravity, respectively. They are respectively engaged with two moving grooves. The two adjustment mechanisms 322 are used to cooperate with each other to clamp the cardboard conveyed by the conveying device 31 and to engage with the cardboard conveyed by the conveying device 31 through friction transmission. They also adjust the posture of the cardboard by rotating the cardboard through the speed difference with the other two adjustment mechanisms 322.

[0043] The transverse drive mechanism 321 is used to drive the two adjustment mechanisms 322 to move along the moving groove.

[0044] It can be understood that the lateral drive mechanism 321, as the power source for the lateral movement of the two adjustment mechanisms 322, can drive the two adjustment mechanisms 322 to move along the moving groove according to the width of the cardboard to be processed, and adjust the distance between the two adjustment mechanisms 322 to adapt to the clamping requirements of cardboard of different widths. For example, the lateral drive mechanism 321 can be a double-acting cylinder, a lead screw slide mechanism, etc., but is not limited to these.

[0045] Two adjusting mechanisms 322 can adjust their spacing under the drive of the transverse drive mechanism 321 to achieve stable clamping of cardboard of different widths. The clamping pressure of the adjusting mechanisms 322 is adjustable to avoid scratching the hot stamping layer on the cardboard surface or deforming the cardboard due to excessive clamping, while also preventing slippage caused by friction transmission due to excessive clamping. The two adjusting mechanisms 322 drive the clamped cardboard to rotate through the speed difference with the other two adjusting mechanisms 322, thereby correcting the tilt and deflection posture deviation of the cardboard. For example, the adjusting mechanism 322 may include a servo motor and a rubber wheel. The servo motor can be set on the transverse drive mechanism 321 to drive the rubber wheel to rotate. The rubber wheel clamps the cardboard and drives the clamped cardboard to rotate through the speed difference.

[0046] With this setup, based on the width parameters of the cardboard to be processed, the horizontal drive mechanism 321 drives the two upper and lower adjustment mechanisms 322 to move along the moving groove until the distance between the two adjustment mechanisms 322 and the other two adjustment mechanisms 322 matches the width of the cardboard, thus completing the setting of the clamping distance. When the cardboard does not deviate, the two adjustment mechanisms 322 form a stable clamp on the cardboard, and the linear velocity corresponding to the rotation speed is the same as the conveying speed of the conveying device 31, so that the cardboard is stably conveyed to the waste removal section 40. When the cardboard deviates, the rotation speed of the two adjustment mechanisms 322 located on the left and right sides of the cardboard is adjusted by the four adjustment mechanisms 322 located on the left and right sides of the cardboard (two adjustment mechanisms 322 form a group, and the two groups of adjustment mechanisms 322 are located on the left and right sides of the cardboard respectively, and the same group of adjustment mechanisms 322 is synchronized when changing the rotation speed), so as to form a rotation speed difference, thereby driving the cardboard to rotate and correcting the posture deviation; after the cardboard posture reaches the standard state (the center of the waste to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the processing direction), the rotation speed difference returns to zero, and each adjustment mechanism 322 conveys the cardboard synchronously with the conveying device 31 at the same rotation speed.

[0047] In some embodiments, please refer to the following: Figure 2 and Figure 3 The lateral drive mechanism 321 includes a lateral drive member 3211 and two lateral drive rods 3212.

[0048] The lateral drive unit 3211 is mounted on the frame 10.

[0049] Two transverse drive rods 3212 are rotatably mounted on the frame 10 and are connected to the transverse drive member 3211. The two transverse drive rods 3212 are located on the upper and lower sides of the machining direction along the direction of gravity, respectively.

[0050] The two adjustment mechanisms 322 are movably mounted on the two transverse drive rods 3212, and the transverse drive member 3211 is used to drive the two transverse drive rods 3212 to rotate, thereby driving the two adjustment mechanisms 322 to move.

[0051] It can be understood that the lateral drive component 3211 acts as a power source, driving the two lateral drive rods 3212 to rotate synchronously by outputting stable and controllable rotational power. For example, the lateral drive component 3211 can be a servo motor, a brushless motor, etc., but is not limited to these.

[0052] Two transverse drive rods 3212 are parallel to each other and located on the upper and lower sides along the direction of gravity in the cardboard processing direction. The two transverse drive rods 3212 are connected to the rotating shaft of the transverse drive member 3211 via gears and rotate at the same speed under the drive of the transverse drive member 3211. The transverse drive rods 3212 are rotatably engaged with the frame 10 via bearings. For example, the transverse drive rods 3212 can be lead screws, racks, etc., but are not limited to these.

[0053] With this configuration, when the width of the cardboard to be processed changes and the position of the adjustment mechanism 322 at its contact point with the cardboard needs to be adjusted, the transverse drive member 3211 drives the two transverse drive rods 3212 to rotate synchronously, causing the two adjustment mechanisms 322 located on the upper and lower sides respectively to move along the moving groove until the adjustment mechanism 322 moves to the position where it needs to contact the cardboard. After the adjustment mechanism 322 moves to the target position, the transverse drive member 3211 stops driving the rotating rod to rotate and locks the rotation state of the drive rod, ensuring that the distance between the two adjustment mechanisms 322 remains stable and without deviation during the clamping process.

[0054] In some embodiments, please refer to the following: Figure 2 and Figure 3 The adjustment mechanism 322 includes a support platform 3221, an adjustment drive component 3222, and an adjustment wheel 3223.

[0055] The support platform 3221 is movably mounted on the transverse drive mechanism 321 and is located on the upper and lower sides along the direction of gravity in the processing direction, and is respectively engaged with two moving grooves. The adjustment drive component 3222 is mounted on the support platform 3221.

[0056] The adjusting wheel 3223 is rotatably mounted on the support platform 3221 and connected to the rotating shaft of the adjusting drive 3222. The two adjusting mechanisms 322 are used to clamp the cardboard conveyed by the conveying device 31 and are in frictional transmission cooperation with the cardboard conveyed by the conveying device 31.

[0057] The adjusting drive 3222 is used to drive the adjusting wheel 3223 to rotate. The two adjusting wheels 3223 of the same adjusting device 32 are used to clamp the cardboard conveyed by the conveying device 31 and engage with the cardboard conveyed by the conveying device 31 through friction transmission. The cardboard is rotated by the speed difference between the two adjusting wheels 3223 of the other adjusting device 32, thereby adjusting the posture of the cardboard.

[0058] It is understood that the support platform 3221 serves as the mounting base for the adjusting drive component 3222 and the adjusting wheel 3223, and is movably mounted on the transverse drive rod 3212 of the transverse drive mechanism 321, and forms a sliding groove engagement with the moving slot of the frame 10. For example, the support platform 3221 can be a block structure or a plate structure processed from aluminum alloy profiles, but is not limited to these.

[0059] The adjustment drive 3222 drives the adjustment wheel 3223 to rotate by outputting controllable rotational power. For example, the adjustment drive 3222 can be a servo motor, a brushless motor, etc., but is not limited to these.

[0060] The adjusting wheel 3223 can be rotatably mounted on the support platform 3221 via bearings, and can be rigidly fixed to the rotating shaft of the adjusting drive component 3222 via a key connection. For example, the adjusting wheel 3223 can be a rubber wheel, a plastic wheel, etc., but is not limited to these. The surface of the adjusting wheel 3223 can be treated with anti-slip fine texture and wear-resistant coating to ensure reliable friction transmission with the cardboard surface and improve service life.

[0061] With this configuration, when the cardboard is not misaligned, the linear velocity corresponding to the rotational speed of the adjusting wheel 3223 is the same as the conveying speed of the conveying device 31. The cardboard fed by the conveying device 31 is clamped and conveyed by the two adjusting wheels 3223 located on the upper and lower sides of the cardboard as it moves along the processing direction, and the cardboard's posture remains unchanged. When the cardboard misaligns, the rotational speed of the two adjusting wheels 3223 of the adjusting device 32 near the lagging side of the cardboard is increased by the adjusting drive 3222, and the two adjusting wheels 3223 of the same adjusting device 32 rotate at the same speed, while the rotational speed of the two adjusting wheels 3223 near the leading side of the cardboard remains unchanged. This creates a speed difference between the adjusting wheels 3223 of the two adjusting devices 32 located on the left and right sides of the cardboard. Through frictional transmission between the adjusting wheels 3223 and the cardboard, the cardboard is driven to rotate until the center of the waste material in the cardboard is collinear with the center of the waste removal hole. After the posture adjustment is completed, the speed difference of the adjustment drive 3222 of the two adjustment devices 32 is synchronously returned to zero, and the adjustment wheel 3223 rotates at a speed matching the conveying device 31, driving the cardboard to be smoothly conveyed to the waste removal section 40.

[0062] Please see Figure 4 This application also provides a paperboard posture adjustment method, applied to the flatbed die-cutting and hot stamping equipment 100 of any of the above claims. The paperboard posture adjustment method includes: An attitude image is acquired through an image acquisition device; wherein, the attitude image reflects the attitude of the cardboard before it enters the adjustment device and the position of the cardboard on the conveying device, and the attitude image includes the cardboard and the waste material marked on the cardboard that needs to be removed; An analysis image is obtained based on the posture image; the analysis image reflects the relative positional relationship of the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, the active area corresponding to each adjusting wheel, and the waste removal hole projected onto a plane parallel to the cardboard surface; Control information is obtained based on the analyzed image; this control information is used to control the rotational speed of the regulating wheel.

[0063] As described above, the cardboard posture adjustment method provided in this application acquires posture images through an image acquisition device, collects the posture and position information of the cardboard before it enters the adjustment device, captures the tilt / deflection state of the cardboard and the specific position of the waste to be removed, providing reliable data support for subsequent posture analysis and adjustment. Then, by generating an analysis image based on the posture image, the cardboard, waste, adjustment wheel, active area, and waste removal hole are projected onto the same plane, establishing the relative positional relationship of each component, eliminating judgment errors caused by spatial dimensional differences, and providing an analytical basis for determining the matching position of the adjustment wheel and the cardboard, and the alignment deviation between the waste and the waste removal hole. Finally, control information is generated based on the analysis image, and the speed adjustment command of the adjustment wheel is calculated by combining the relative positional relationship. By controlling the speed difference of the adjustment wheel, the posture of the cardboard is corrected, ensuring that the center of the waste and the center of the waste removal hole are collinear in the processing direction, improving problems such as incomplete waste removal and finished product damage caused by posture deviation, and ensuring processing accuracy and yield.

[0064] To better understand the cardboard posture adjustment method provided in the embodiments of this application, the specific implementation process of the cardboard posture adjustment method provided in the embodiments of this application will be described by way of example below.

[0065] Figure 4 A schematic flowchart of a cardboard posture adjustment method provided in an embodiment of this application is shown. The cardboard posture adjustment method includes: S100, an attitude image is acquired through an image acquisition device; wherein, the attitude image reflects the attitude of the cardboard before entering the adjustment device and the position of the cardboard on the conveying device, and the attitude image includes the cardboard and the waste material marked on the cardboard that needs to be removed.

[0066] It is understood that an image acquisition device is a device capable of capturing images of cardboard. For example, the image acquisition device can be a CCD camera, CMOS camera, or monochrome camera that is pre-set on a frame and located above the conveyor, capturing images of cardboard in a direction perpendicular to the cardboard surface, but is not limited to these. The methods for identifying the contours of the cardboard body and the waste material can include first performing preprocessing operations on the posture image (including grayscale conversion, noise filtering, contrast enhancement, and binarization segmentation), and then using edge detection algorithms (such as the Canny operator, Sobel operator, etc.) to extract the contour features of the cardboard surface or waste material edges in the image, distinguishing the boundary between the waste area formed by die-cutting and creasing and the finished cardboard area. Alternatively, the posture image can be input into an image recognition model pre-trained through machine learning, and the data transmitted by the image recognition model after recognizing the posture image can be received, but is not limited to these methods. The image acquisition device captures images that reflect the spatial position of the cardboard on the conveying device and its real-time posture (such as tilt angle and deflection direction) before entering the adjustment device. The images clearly show the complete outline of the cardboard body and the geometric outline and position information of the waste material to be removed marked on the cardboard surface, providing data support for the subsequent analysis and adjustment of the cardboard posture.

[0067] S200, an analysis image is obtained based on the posture image; wherein, the analysis image reflects the relative positional relationship of the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, the active area corresponding to each adjusting wheel, and the waste removal hole projected onto a plane parallel to the cardboard surface.

[0068] It is understandable that, based on the pre-processed cardboard posture image, an analytical image is generated through 3D space-to-2D plane mapping, accurately representing the cardboard body, the waste to be removed from the cardboard surface, each posture adjustment wheel, the corresponding active area of ​​each adjustment wheel, and the waste removal orifice of the waste removal device. The analytical image reflects the relative positional relationship of five types of objects—the cardboard body, the waste to be removed from the cardboard surface, each posture adjustment wheel, the corresponding active area of ​​each adjustment wheel, and the waste removal device—on a 2D projection plane parallel to the cardboard surface. The projected contours and coordinate distribution of each type of object are calibrated, providing a basis for the subsequent formulation of adjustment wheel speed control strategies.

[0069] In one possible implementation, please refer to Figure 5 S200, Based on the pose image, an analysis image is obtained, including: S210, the attitude image is mapped onto the processing environment, and then the cardboard, the waste to be removed from the cardboard, each adjusting wheel and each waste removal hole in the processing environment are projected along the Z-axis of the processing environment onto the plane composed of the X-axis and Y-axis of the processing environment, and the projected image is confirmed as the analysis image; wherein, the processing environment includes a three-dimensional coordinate system and a conveying adjustment unit and a waste removal unit pre-placed in the three-dimensional coordinate system according to the actual processing environment, the Z-axis direction of the processing environment is perpendicular to the cardboard surface, and the Y-axis direction of the processing environment is parallel to the processing direction.

[0070] It is understandable that the cardboard posture image is mapped to a pre-constructed three-dimensional processing environment coordinate system at a 1:1 scale. Then, the cardboard body, the waste to be removed from the cardboard surface, each posture adjustment wheel, and each waste removal hole in the processing environment are orthogonally projected along the Z-axis of the processing environment coordinate system onto a two-dimensional plane composed of the X-axis and Y-axis (parallel to the cardboard surface). The resulting two-dimensional projection image is confirmed as the analysis image, which can realize the accurate mapping and position calibration of three-dimensional spatial objects to two-dimensional planes, providing a basis for subsequent steps.

[0071] S220, the area swept by each adjustment wheel on the analysis image as it moves along the X-axis of the three-dimensional coordinate system is identified as the active area.

[0072] It is understandable that the two-dimensional projection of each adjusting wheel in the analysis image is used to scan the two-dimensional area covered by the trajectory when it moves along the X-axis direction (perpendicular to the machining direction) of the three-dimensional machining environment coordinate system (the moving distance of the two-dimensional projection of the adjusting wheel corresponds to the moving distance of the adjusting wheel when it is driven by the lateral drive mechanism). This is identified as the active area corresponding to each adjusting wheel, and the boundary of the movable range of the adjusting wheel is accurately marked, providing a spatial range basis for the subsequent selection and confirmation of the clamping position.

[0073] S300 obtains control information based on the analyzed image; the control information is used to control the rotational speed of the regulating wheel.

[0074] It is understandable that the method of obtaining control information based on the analysis image can be as follows: First, extract the projection position parameters of the cardboard, the waste to be rejected, and the waste removal hole from the analysis image; determine the coordinates of the center point of the waste and the center point of the waste removal hole; draw a dividing line along the processing direction with the center point of the hole as the starting point; determine the leading and lagging sides of the cardboard posture based on the contact between the dividing line and the center point of the waste; and then distinguish the acceleration wheel that needs to be accelerated and the constant speed wheel that maintains the speed. Subsequently, within the active area corresponding to each adjustment wheel, move the candidate position along the vertical processing direction and extend it as a ray; calculate the overlap area with the cardboard; and select the position with a contact area exceeding a preset threshold, without touching the waste and hot stamping area, and farthest from the center of the cardboard as the clamping position. Then, calculate the correction length and deflection angle of the cardboard based on the clamping position, and further calculate the correction displacement difference, the passage time, and the linear velocity increase rate. Finally, derive the speed adjustment value of the adjustment wheel. Alternatively, the analysis image can be sent to the user and the control information transmitted by the user can be received, but it is not limited to these methods. Based on the image analysis, the speed adjustment parameters corresponding to each adjustment wheel are obtained. This information is used to precisely control the adjustment drive to achieve differentiated control of the speed of different adjustment wheels, thereby completing the correction and calibration of the cardboard posture.

[0075] In one possible implementation, please refer to Figure 6 S300, based on the analyzed image, obtains control information, including: S310, based on the analysis image, the acceleration wheel and the constant speed wheel are obtained; among them, the acceleration wheel is the adjustment wheel whose speed needs to be increased, and the constant speed wheel is the adjustment wheel whose speed does not need to be changed.

[0076] It can be understood that the rotational speed does not need to be changed, meaning the linear velocity corresponding to the rotational speed is the same as the speed at which the conveyor transports the cardboard. The method for determining the acceleration and constant-speed wheels based on the image analysis can be as follows: First, accurately locate and extract the coordinates of the center point of the cardboard to be removed and the center point of the waste removal hole from the image analysis; then, starting from the center point of the waste removal hole, draw a ray along the processing direction towards the cardboard, defining this ray as a dividing line; subsequently, perform a judgment based on the contact relationship between the dividing line and the center point of the waste. If the dividing line contacts the center point of the waste, it indicates that the cardboard posture is without deviation, and all adjusting wheels are identified as constant-speed wheels that do not require speed adjustment; if the dividing line does not contact the center point of the waste, first determine the leading and lagging sides of the cardboard based on the relative position of the cardboard and the waste removal hole, then designate the adjusting wheel closest to the leading side as a constant-speed wheel, and the adjusting wheel closest to the lagging side as an acceleration wheel that needs speed increase. Alternatively, the analysis image can be sent to the user and data transmitted by the user can be received, but this is not limited to these methods. Determining the acceleration and constant-speed wheels based on the image analysis provides a clear wheel type classification basis for adjusting the drive components to perform differentiated speed control.

[0077] In one possible implementation, please refer to Figure 6S310, based on the analyzed image, obtains the acceleration wheel and the constant speed wheel, including: S311, obtain the waste center point and the hole center point based on the analysis image; wherein, the waste center point is the center point of the waste on the analysis image, and the hole center point is the center point of the waste-clearing hole on the analysis image.

[0078] It can be understood that the waste center point is the geometric center of the projected area of ​​the waste to be removed in the analysis image, and the hole center point is the geometric center of the projected area of ​​the waste hole in the analysis image. The waste center point and hole center point can be determined using image feature extraction algorithms (centroid method, geometric center calculation method, edge fitting algorithm, etc.). Obtaining the waste center point and hole center point based on the analysis image can provide a coordinate reference for determining the leading and lagging sides of the cardboard posture, and provide a basis for adjusting the wheel shape.

[0079] S312, starting from the center point of the hole, draw a ray along the processing direction onto the cardboard, and identify the ray as the dividing line.

[0080] It is understandable that taking the center point of the waste removal hole in the analysis image as the starting coordinate, drawing a ray along the paperboard processing and conveying direction towards the paperboard body, and confirming this ray as the attitude determination dividing line can provide a judgment benchmark for judging the contact relationship between the dividing line and the waste center point, and analyzing the leading and lagging sides of the paperboard attitude.

[0081] S313, if the dividing line is in contact with the center point of the waste, then all the adjusting wheels are identified as uniform speed wheels; if the dividing line is not in contact with the center point of the waste, then the leading side and the lagging side are obtained based on the analysis image, and the adjusting wheel closest to the leading side is identified as a uniform speed wheel, and the adjusting wheel closest to the lagging side is identified as an acceleration wheel.

[0082] It is understandable that the method for obtaining the leading and lagging sides based on the analysis image can be to establish a local coordinate system with the center point of the waste removal hole in the analysis image as the origin, take the dividing line extending along the processing direction as the Y-axis baseline, extract the X-axis coordinate of the center point of the waste to be removed and calculate the difference with the X-axis coordinate of the dividing line. If the X-axis coordinate of the waste center point is greater than the X-axis coordinate of the dividing line, then the cardboard is determined to be the leading side in the positive X-axis direction and the lagging side in the negative X-axis direction. Conversely, the negative X-axis direction is determined to be the leading side and the positive X-axis direction to be the lagging side. Alternatively, the side of the cardboard projection outline that first reaches the active area corresponding to the projection outline of the adjusting wheel along the processing direction can be identified as the leading side, and the side that reaches the active area corresponding to the projection outline of the adjusting wheel later can be identified as the lagging side, etc., but it is not limited to these methods. If the attitude determination dividing line is in contact with the center point of the waste, it indicates that the cardboard attitude is not deflected and the waste and the waste removal hole are accurately aligned. At this time, all adjusting wheels are defined as uniform speed wheels to ensure that the cardboard is transported smoothly to the waste removal section. If the attitude determination dividing line is not in contact with the center point of the waste, it indicates that the cardboard has an attitude deviation. Based on the analysis image, the leading side and the lagging side are obtained. The adjusting wheel closest to the leading side is identified as the uniform speed wheel, and the adjusting wheel closest to the lagging side is identified as the acceleration wheel. This can provide a wheel type classification basis for subsequent differential speed control and cardboard attitude correction.

[0083] S320, based on the acceleration wheel, the constant speed wheel and the analysis image, obtain the clamping positions corresponding to the acceleration wheel and the constant speed wheel respectively; wherein, the clamping position reflects the position where the adjusting wheel corresponding to the acceleration wheel or the constant speed wheel contacts the cardboard.

[0084] It is understandable that the clamping position reflects the position area of ​​different types of adjusting wheels when they first come into contact with the cardboard surface. The method for obtaining the clamping positions corresponding to the accelerating and constant-speed wheels based on the accelerating wheel, the constant-speed wheel, and the analysis image can be as follows: first, define the projection range of each adjusting wheel as a candidate position, and use its corresponding active area as the analysis range; then, move the candidate positions at preset intervals along a direction perpendicular to the processing direction, extending them radially towards the cardboard after each movement; count the overlapping contact area between the candidate positions and the cardboard after the extension; finally, select the positions from multiple sets of contact area data that meet the following three conditions: contact area greater than a preset threshold, no contact with the waste material to be removed or the hot stamping area on the cardboard, and the furthest distance from the center of the cardboard along the perpendicular processing direction. These positions are then used as the clamping positions corresponding one-to-one with the accelerating and constant-speed wheels. Alternatively, the accelerating wheel, the constant-speed wheel, and the analysis image can be sent to the user, and data transmitted by the user can be received, but this is not limited to these methods. The clamping positions corresponding to the acceleration wheel and the constant speed wheel, obtained from the analysis image, can prevent the adjustment wheel from touching the waste material and hot stamping area on the cardboard, providing a stable clamping reference for subsequent differentiated speed control and ensuring the accuracy and reliability of cardboard posture correction.

[0085] In one possible implementation, please refer to Figure 6 S320, based on the acceleration wheel, the constant speed wheel, and the analysis image, obtains the clamping positions corresponding to the acceleration wheel and the constant speed wheel, respectively, including: S321, the range of the acceleration wheel or constant speed wheel on the analysis image is identified as the candidate position, and the active area corresponding to the candidate position is identified as the analysis area.

[0086] It is understandable that identifying the two-dimensional projection range of the acceleration wheel or the constant speed wheel in the analysis image as candidate positions, and determining the corresponding adjustment wheel activity area as the analysis area, can provide a basis for subsequent steps.

[0087] S322, the candidate positions are moved sequentially within the analysis area at preset intervals along a direction perpendicular to the processing direction, and after each movement, the candidate positions are extended radially toward the cardboard along the processing direction, so that the area formed by the extended candidate positions overlaps with the cardboard.

[0088] It is understandable that the preset interval can be 1 cm, 5 cm, or a value set by the user based on the width of the cardboard, but it is not limited to these. The candidate position is moved sequentially at preset intervals within the corresponding analysis area along a direction perpendicular to the cardboard processing direction. After each translation, the candidate position is extended radially towards the cardboard body along the processing direction, so that the extended coverage area partially overlaps with the cardboard, providing a basis for subsequent steps.

[0089] S323, calculate the area of ​​the area formed by the movement and extension of the candidate position each time and the overlapping part of the cardboard, to obtain multiple contact areas.

[0090] It is understandable that methods for calculating the area of ​​the overlapping portion between the candidate position and the cardboard after each movement and extension can include pixel statistics, geometric fitting, etc., but are not limited to these. Calculating the overlapping area between the coverage area formed by each candidate position after each translation and ray extension along the processing direction and the cardboard area in the analysis image, thereby obtaining multiple sets of contact area data corresponding to different positions, can provide a basis for subsequent steps.

[0091] S324, the candidate position corresponding to the contact area that is larger than the preset area and does not contact the waste material and hot stamping area to be removed on the cardboard, and is farthest from the center of the cardboard in the direction perpendicular to the processing direction, is identified as the clamping position; wherein, the hot stamping area is the area range of the hot stamping layer on the cardboard.

[0092] It is understandable that the preset area can be 200mm², 500mm², or set by the user according to the type of cardboard (for example, the preset area for small-format cardboard (such as packaging cardboard and label paper within 300mm×200mm) can be set to 200mm²–500mm², and the preset area for medium and large-format cardboard (such as corrugated cardboard and thick cardboard above 500mm×400mm) can be set to 500mm²–1000mm²), but is not limited to these. The hot stamping area is the actual coverage area of ​​the hot stamping layer on the cardboard surface. By comprehensively screening the candidate positions corresponding to multiple contact areas, the clamping position can ensure the clamping stability of the adjusting roller pair on the cardboard by improving the static friction reliability, while avoiding damage to the functional areas of the cardboard, and providing a reliable clamping reference for subsequent differentiated speed control.

[0093] S330 obtains control information based on the clamping position and the analyzed image.

[0094] It is understandable that the control information obtained based on the clamping position and the analysis image can be obtained by first drawing a ray along the processing direction from the midpoint of the clamping position corresponding to the acceleration wheel, penetrating the cardboard, and determining the length of the part of the ray in contact with the cardboard as the correction length. Then, the center point of the waste material and the center point of the hole are connected by a straight line as the two endpoints to obtain the correction line. A ray is drawn along the processing direction with the center point of the hole as the endpoint to obtain the baseline. The angle formed by the correction line and the baseline is determined as the deflection angle. Subsequently, the width of the cardboard is multiplied by the sine of the deflection angle to obtain the correction displacement difference, which reflects the additional distance that the cardboard needs to move on the lagging side corresponding to the acceleration wheel. The correction length is divided by the basic conveying speed of the conveying device to obtain the transit time, which reflects the time it takes for the cardboard to pass through the adjustment wheel. The correction displacement difference is divided by the transit time to obtain the linear velocity increase rate. The value obtained by multiplying 60 by the linear velocity increase rate is divided by π and then divided by the diameter of the adjustment wheel to obtain the speed adjustment value. Finally, the control information is obtained to instruct the adjustment drive to increase the speed of the acceleration wheel by the speed adjustment value. Alternatively, the clamping position and analysis image can be sent to the user and then the control information transmitted by the user can be received, but it is not limited to these methods. The control information obtained from the clamping position and image analysis can provide data support for controlling the rotation speed of the adjustment wheel, ensuring the rapid correction of the cardboard posture and the stable operation of the die-cutting and hot stamping processes.

[0095] In one possible implementation, please refer to Figure 6 S330, based on the clamping position and analyzed image, obtains control information, including: S331, make a ray through the paperboard along the processing direction from the midpoint of the clamping position corresponding to the acceleration wheel, and determine the length of the part of the ray that contacts the paperboard as the correction length.

[0096] It is understandable that, starting from the midpoint of the clamping position corresponding to the acceleration wheel, a ray is drawn along the paperboard processing and conveying direction and penetrates the paperboard body. The length of the contact section between the ray and the paperboard is defined as the correction length, which can provide a basis for subsequent calculation of the correction displacement difference, linear velocity increase and rotational speed adjustment value in combination with the deflection angle.

[0097] S332, connect the center point of the waste material and the center point of the hole with a straight line to obtain the correction line, draw a ray along the processing direction with the center point of the hole as the endpoint to obtain the reference line, and confirm the angle between the correction line and the reference line as the deflection angle.

[0098] It is understandable that a correction line is constructed by connecting the center point of the waste to be removed and the center point of the waste removal hole as two endpoints with a straight line. Then, a ray is drawn along the paperboard processing direction with the center point of the waste removal hole as the starting endpoint to form a baseline. The angle between the correction line and the baseline is defined as the deflection angle of the paperboard, which can provide a basis for subsequent calculation of the paperboard attitude deviation and derivation of speed adjustment parameters.

[0099] S333 obtains control information based on the correction length and deflection angle.

[0100] It is understandable that the control information obtained based on the correction length and deflection angle can be calculated by first multiplying the cardboard width by the sine of the deflection angle to obtain the correction displacement difference, reflecting the additional movement required on the lagging side of the cardboard. Then, the correction length is divided by the basic conveying speed of the conveyor to obtain the passage time of the cardboard through the adjusting wheel. Subsequently, the correction displacement difference is divided by the passage time to obtain the linear velocity increase rate. Then, the speed adjustment value is calculated by (60 × linear velocity increase rate) / (π × adjusting wheel diameter). Finally, control information is generated to instruct the adjusting drive to increase the speed of the acceleration wheel by this adjustment value. Alternatively, the correction length and deflection angle can be sent to the user and then the user's data can be received, but this is not limited to these methods. The control information obtained based on the correction length and deflection angle for regulating the speed of the acceleration wheel can provide instruction support for correcting the cardboard's posture by rotating the cardboard through the speed difference.

[0101] In one possible implementation, please refer to Figure 6 S333, based on the correction length and deflection angle, obtains control information, including: S3331, multiply the width of the cardboard by the sine of the deflection angle to obtain the correction displacement difference.

[0102] It can be understood that the width of the cardboard is the maximum distance between the two edges of the cardboard perpendicular to the processing direction, and the correction displacement difference represents the additional distance that the lagging side of the cardboard corresponding to the acceleration wheel needs to move to compensate. Multiplying the cardboard width by the sine of the deflection angle to obtain the correction displacement difference can provide a basis for the subsequent increase in the speed of the push-lead and the adjustment of the rotation speed.

[0103] For example, assuming the cardboard width is 800mm and the deflection angle is 0.5°, the correction displacement difference is approximately 800 × sin0.5° ≈ 6.98mm.

[0104] S3332, divide the correction length by the basic conveying speed to obtain the transit time.

[0105] It is understandable that time represents the duration it takes for the cardboard to completely pass through the clamping area of ​​the adjusting wheel, and the base conveying speed is the reference operating speed of the conveying device. The base conveying speed can be obtained by calculating it based on the motor speed parameters of the conveying device, combined with mechanical parameters such as the reduction ratio of the transmission system and the diameter of the conveying rollers. Alternatively, it can be determined by setting the conveying speed of the conveying device in the processing technology, but it is not limited to these methods. Dividing the correction length by the base conveying speed to obtain the cardboard's passage time provides a basis for subsequently deriving the linear velocity increase of the acceleration wheel.

[0106] For example, assuming the correction length is 200mm and the basic conveying speed is 500mm / s, the transit time = 200 / 500 = 0.4s.

[0107] S3333, divide the difference in correction displacement by the time to obtain the linear velocity increase rate.

[0108] It is understandable that dividing the difference in correction displacement by the time to obtain the linear velocity increase required by the acceleration wheel can provide a basis for subsequent steps.

[0109] For example, assuming the correction displacement difference is 6.98 mm and the transit time is 0.4 s, the linear velocity increase rate is 17.45 mm / s.

[0110] S3334, the value obtained by multiplying 60 by the linear velocity increase rate, dividing it by π, and then dividing it by the diameter of the adjusting wheel, is confirmed as the speed adjustment value; where the diameter of the adjusting wheel is the diameter of the adjusting wheel.

[0111] It is understandable that multiplying 60 by the linear velocity increase rate, dividing the result by π, and then dividing by the diameter of the adjusting wheel, and confirming the result as the speed adjustment value, can provide accurate quantitative parameters for indicating the driving component to perform speed compensation operation.

[0112] For example, assuming the linear velocity increase rate is 17.45 mm / s and the adjusting wheel diameter is 50 mm, the speed adjustment value is (60 × 17.45) / (π × 50) = 6.6 r / min.

[0113] S3335, control information is received indicating that the drive unit will increase the speed of the acceleration wheel by the speed adjustment value.

[0114] It is understandable that obtaining the control information indicating the adjustment drive to increase the speed of the acceleration wheel by the speed adjustment value can provide a clear execution basis for driving the adjustment wheel to perform differentiated speed compensation actions and realize cardboard posture correction.

[0115] The flatbed die-cutting and hot stamping equipment 100 provided in this application embodiment may further include a control unit. The control unit may be mounted on the frame and communicatively connected to the image acquisition device, the lateral drive component, and the adjustment drive component. The control unit is used to receive images transmitted by the image acquisition device, control the lateral drive component to drive the adjustment wheel to move, and control the adjustment drive component to drive the adjustment wheel to rotate. The control unit may include at least one processor, at least one memory, and a computer program stored in at least one memory and executable on at least one processor. When the processor executes the computer program, it causes the flatbed die-cutting and hot stamping equipment 100 to implement the steps in any of the above-described paperboard posture adjustment method embodiments.

[0116] For example, a computer program can be divided into one or more modules / units, one or more of which are stored in memory and executed by a processor to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the control unit.

[0117] The control unit can be a computing device such as an industrial computer, programmable logic controller, control box, desktop computer, laptop, handheld computer, and cloud server. This control unit may include, but is not limited to, a processor and memory. Those skilled in the art will understand that the above embodiments are merely examples of control units and do not constitute a limitation on the control unit. It may include more or fewer components, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0118] The processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0119] In some embodiments, the memory may be an internal storage unit of the control unit, such as the hard disk or RAM of the control unit. In other embodiments, the memory may be an external storage device of the control unit, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control unit. Furthermore, the memory may include both internal storage units and external storage devices of the control unit. The memory is used to store the operating system, applications, bootloader, data, and other programs, such as program code for computer programs. The memory can also be used to temporarily store data that has been output or will be output.

[0120] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0121] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of adjusting the attitude of a paperboard, characterized by, This equipment is applied to flatbed die-cutting and hot stamping machines. The flatbed die-cutting and hot stamping machine includes a frame and a hot stamping section, the hot stamping section being mounted on the frame and used for hot stamping cardboard. The flatbed die-cutting and hot stamping machine also includes: The die-cutting unit, located on the frame, is used to receive the cardboard output from the hot stamping unit and to die-cut the cardboard. A conveying and adjusting unit, mounted on the frame, is used to receive the die-cut cardboard output from the die-cutting unit, convey the cardboard along the processing direction, and adjust the orientation of the cardboard; and The waste removal section is installed on the frame and has a waste removal hole. The waste removal section is used to receive the cardboard output by the conveying adjustment section and remove the waste material on the cardboard through the waste removal hole to separate the finished cardboard from the waste material. The conveying adjustment unit adjusts the posture of the cardboard so that the center of the waste material to be removed on the cardboard is collinear with the center of the corresponding waste removal hole in the processing direction. The cardboard posture adjustment method includes: An attitude image is acquired through an image acquisition device; wherein, the attitude image reflects the attitude of the cardboard before it enters the adjustment device and the position of the cardboard on the conveying device, and the attitude image includes the cardboard and waste material marked on the cardboard that needs to be removed; An analysis image is obtained based on the posture image; wherein, the analysis image reflects the relative positional relationship of the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, the active area corresponding to each adjusting wheel, and the waste removal hole projected onto a plane parallel to the surface of the cardboard; Control information is obtained based on the analyzed image; wherein, the control information is used to control the rotational speed of the regulating wheel; The control information obtained based on the analyzed image includes: Based on the analyzed image, an acceleration wheel and a constant speed wheel are obtained; wherein, the acceleration wheel is an adjustment wheel whose rotational speed needs to be increased, and the constant speed wheel is an adjustment wheel whose rotational speed does not need to be changed; Based on the acceleration wheel, the constant speed wheel, and the analysis image, clamping positions corresponding to the acceleration wheel and the constant speed wheel are obtained respectively; wherein, the clamping position reflects the position where the adjusting wheel corresponding to the acceleration wheel or the constant speed wheel contacts the cardboard; The control information is obtained based on the clamping position and the analyzed image; The step of obtaining clamping positions corresponding to the acceleration wheel and the constant speed wheel based on the acceleration wheel, the constant speed wheel, and the analysis image includes: The range of the acceleration wheel or the constant speed wheel on the analysis image is identified as a candidate position, and the active area corresponding to the candidate position is identified as the analysis area; The candidate positions are moved sequentially within the analysis area at preset intervals along a direction perpendicular to the processing direction. After each movement, the candidate positions are extended radially toward the cardboard along the processing direction, so that the area formed by the extended candidate positions partially overlaps with the cardboard. Calculate the area of ​​the overlapping portion of the region formed by each movement and extension of the candidate position with the cardboard to obtain multiple contact areas; The candidate position corresponding to the contact area that is larger than the preset area and does not contact the waste material and hot stamping area to be removed on the cardboard, and is farthest from the center of the cardboard in a direction perpendicular to the processing direction, is identified as the clamping position; wherein, the hot stamping area is the area range of the hot stamping layer on the cardboard.

2. The cardboard posture adjustment method as described in claim 1, characterized in that, The conveying adjustment unit includes: A conveying device, mounted on the frame, is used to receive the die-cut cardboard output from the die-cutting section and convey the cardboard to the waste removal section along the processing direction; Two adjusting devices, mounted on the frame, are used to engage with the cardboard conveyed by the conveying device via friction drive, and the cardboard's posture is adjusted by rotating it through the speed difference between the two adjusting devices; and An image acquisition device is mounted on the frame and close to the adjustment device, for acquiring an image of the cardboard's posture before it enters the adjustment device.

3. The cardboard posture adjustment method as described in claim 2, characterized in that, The frame has multiple moving slots, which are perpendicular to the processing direction. The adjustment device includes: A lateral drive mechanism is mounted on the frame; and Two adjustment mechanisms are movably mounted on the transverse drive mechanism and are located on the upper and lower sides of the processing direction along the direction of gravity, respectively. They are respectively engaged with the two moving grooves. The two adjustment mechanisms are used to cooperate with each other to clamp the cardboard conveyed by the conveying device and to engage with the cardboard conveyed by the conveying device through friction transmission. They also adjust the posture of the cardboard by rotating the cardboard through the speed difference with the other two adjustment mechanisms. The lateral drive mechanism is used to drive the two adjustment mechanisms to move along the moving groove.

4. The cardboard posture adjustment method as described in claim 3, characterized in that, The lateral drive mechanism includes: A lateral drive element, mounted on the frame; and Two transverse drive rods are rotatably mounted on the frame and are connected to the transverse drive component. The two transverse drive rods are located on the upper and lower sides of the processing direction along the direction of gravity, respectively. The two adjustment mechanisms are movably mounted on the two transverse drive rods, and the transverse drive member is used to drive the two transverse drive rods to rotate, thereby driving the two adjustment mechanisms to move.

5. The cardboard posture adjustment method as described in claim 3, characterized in that, The adjustment mechanism includes: The support platform is movably mounted on the transverse drive mechanism and is located on the upper and lower sides of the processing direction along the direction of gravity, respectively, and cooperates with the two moving grooves respectively. Adjustment drive components are mounted on the support platform; and An adjusting wheel is rotatably mounted on the support platform and connected to the rotating shaft of the adjusting drive. The two adjusting mechanisms are used to clamp the cardboard conveyed by the conveying device and engage with the cardboard conveyed by the conveying device through friction transmission. The adjusting drive is used to drive the adjusting wheel to rotate. The two adjusting wheels of the same adjusting device are used to clamp the cardboard conveyed by the conveying device and engage with the cardboard conveyed by the conveying device through friction transmission. The cardboard is rotated by the speed difference between the two adjusting wheels of the other adjusting device, thereby adjusting the posture of the cardboard.

6. The cardboard posture adjustment method as described in claim 1, characterized in that, The process of obtaining the analysis image based on the pose image includes: The posture image is mapped onto the processing environment. Then, the cardboard, the waste material to be removed from the cardboard, each adjusting wheel, and each waste removal hole in the processing environment are projected onto the plane formed by the X and Y axes of the processing environment along the Z-axis of the processing environment. The projected image is then confirmed as the analysis image. The processing environment includes a three-dimensional coordinate system and a conveying adjustment unit and a waste removal unit that are pre-placed in the three-dimensional coordinate system according to the actual processing environment. The Z-axis of the processing environment is perpendicular to the cardboard surface, and the Y-axis of the processing environment is parallel to the processing direction. The area swept by each adjustment wheel on the analysis image as it moves along the X-axis of the three-dimensional coordinate system is identified as the active area.

7. The cardboard posture adjustment method as described in claim 1, characterized in that, The process of obtaining the acceleration wheel and the constant speed wheel based on the analyzed image includes: The waste center point and the hole center point are obtained based on the analysis image; wherein, the waste center point is the center point of the waste on the analysis image, and the hole center point is the center point of the waste-clearing hole on the analysis image; Starting from the center point of the hole, draw a ray along the processing direction toward the cardboard, and identify the ray as the dividing line; If the dividing line is in contact with the center point of the waste, then all the adjusting wheels are identified as the constant speed wheels; if the dividing line is not in contact with the center point of the waste, then the leading side and the lagging side are obtained based on the analysis image, and the adjusting wheel closest to the leading side is identified as the constant speed wheel, and the adjusting wheel closest to the lagging side is identified as the acceleration wheel.

Images