Automatic deviation correction feeding and forming equipment for composite paperboard

Abstract

This invention relates to the field of composite paperboard processing technology, specifically an automatic alignment and feeding forming device for composite paperboard. It includes a guide assembly frame and its corresponding feeding support frame. The guide assembly frame has a guide sliding platform, a pushing and turnover module installed on one side, and a lateral limiting unit installed on the other side. The feeding support frame has a feeding worktable with a lateral adjustment mechanism along its side. A lifting and adjusting mechanism is slidably installed on the lateral adjustment mechanism, and a two-layer alignment detection combination bracket is mounted on the lifting and adjusting mechanism, located at the upper and lower positions of the feeding worktable's surface. Several fine-tuning pushers are located along the side edge of the feeding worktable's outlet area. The lateral adjustment mechanism, lifting and adjusting mechanism, alignment detection combination bracket, and fine-tuning pushers form a multi-level linkage alignment closed-loop system, significantly improving the positional accuracy and operational stability during the composite paperboard forming process.

Description

Technical Field

[0001] This invention relates to the field of composite paperboard processing technology, specifically to an automatic alignment feeding and forming equipment for composite paperboard. Background Technology

[0002] Composite paperboard is widely used in packaging, construction, transportation, and other fields. In the continuous production process of composite paperboard, multiple layers of paper or paperboard need to be precisely stacked, glued, and pressed according to predetermined relative positions to form a composite board with specific thickness and properties. Among these, the positioning accuracy in the feeding stage directly determines the edge neatness and composite strength of the final product.

[0003] Currently, common composite paperboard feeding equipment typically includes a guide table, a conveyor belt, and lateral limiting baffles. Existing sensors can usually only detect whether the paperboard has crossed the boundary, but cannot distinguish the source of the deviation—whether it is the conveyor belt itself running off track or experiencing tension fluctuations, or the paperboard itself being skewed or warped, causing misadjustment or overadjustment. If there are positional deviations between the layers of paperboard fed into the laminating station, it can lead to edge misalignment, poor overlap, material waste, or even scrapping the entire roll. Therefore, how to achieve automatic deviation correction feeding of composite paperboard during high-speed conveying has become a key technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic alignment feeding and forming device for composite paperboard to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic correction and feeding forming device for composite paperboard includes a guide assembly frame and a feeding support frame connected to the guide assembly frame. The guide assembly frame includes a load-bearing column frame, a bottom support module is provided on the load-bearing column frame, and a guide sliding platform for paperboard feeding input is provided on the bottom support module. A left wing support plate is provided on one side of the load-bearing column frame, and a pusher turnover module for pushing the composite cardboard along the guide sliding platform is installed on the left wing support plate; A right-side wing support plate is provided on the other side of the load-bearing column frame, and a lateral limiting unit for limiting the other side of the composite paperboard is installed on the right-side wing support plate. The feeding support frame is connected to the guide assembly frame through a docking connector. The feeding support frame is provided with a main support part, and a feeding worktable is mounted on the main support part. Auxiliary support parts are provided on the bottom edge and side edge of the main support part. A transverse adjustment mechanism is provided on the side edge of the auxiliary support part. A lifting adjustment mechanism is slidably installed on the transverse adjustment mechanism. A double-structured calibration and detection combination bracket is provided on the lifting adjustment mechanism in a lifting manner. The calibration and detection combination bracket has two layers and is located at the upper and lower positions of the belt surface of the feeding worktable, respectively. Several fine-tuning actuators are provided along the side edge of the outlet area of ​​the feeding workbench; The material pushing and turnover module and the lateral limiting unit form a positioning defense line that combines coarse and fine positioning. The lateral adjustment mechanism, the lifting and adjusting mechanism, the positioning detection combination bracket and the fine adjustment pusher constitute a multi-level linkage correction closed-loop system.

[0006] As a further aspect of the present invention: the lateral limiting unit includes: The base support plate is fixed to the right wing support plate. The right wing support plate is provided with several locking grooves. The base support plate is slidably installed in the corresponding locking grooves by several assembly positioning plates and fixed by locking bolts to achieve lateral coarse adjustment. Several adjustable support assemblies are installed on the base support plate. Each adjustable support assembly is equipped with a vertical adjustment rod and a horizontal adjustment rod. The horizontal adjustment rod adjusts the installation position through the adjustable support assembly. A side stop limiting plate is fixedly installed at the front end of the vertical adjustment rod. The side stop limiting plate is located on the side edge of the guide sliding platform and is used for horizontal fine adjustment of the position of the side stop limiting plate to adapt to cardboard of different widths.

[0007] As a further aspect of the present invention: the material pushing and turnover module includes: Linear translation module; Precision guide rails are installed on the linear motion module; Side wing sliding seat that is slidably mounted on a precision guide rail; The pusher plate, which is L-shaped and located on the side wing sliding seat, is used to abut the edge of the composite paperboard. Top mounting bracket is installed on the pusher contact plate; The visual monitoring probe, mounted on the top mounting bracket, is used to collect real-time data on the edge position of the cardboard, forming a visual-mechanical composite positioning with the lateral limiting unit.

[0008] As a further aspect of the present invention: the alignment detection combined bracket includes an upper detection bracket and a lower detection bracket, and both the upper and lower detection brackets include: Test reference plate; The detection cantilever is mounted on the detection reference plate; The detection contact plate is installed on the detection cantilever via the detection connector; The lower detection touch plate is attached to the bottom plane of the belt on the feeding workbench to sense belt tension fluctuations, while the upper detection touch plate has a slightly curved edge for non-contact sensing of cardboard warping or thickness changes. Edge sensing units are installed on both the upper and lower detection cantilever arms to distinguish between two types of deviations: belt misalignment and cardboard skewness.

[0009] As a further aspect of the present invention: the edge sensing unit includes: The sensor mounting bracket is installed on the detection cantilever and its position can be adjusted along the detection cantilever. Sensor mounting bracket installed on sensor mounting base; Two sensor probes are mounted on the sensor mounting bracket, and the ends of the two sensor probes are respectively equipped with a small-diameter elastic contact wheel and a large-diameter elastic contact wheel. The edge of the belt on the feeding table is located between the small-diameter elastic contact wheel and the large-diameter elastic contact wheel, forming a wheel gap detection mechanism to convert the belt edge offset into an electrical signal.

[0010] As a further aspect of the present invention: a transverse adjustment mechanism is provided at the top of a transverse mounting base, and a transverse guide rail is provided on the transverse mounting base; The lifting and adjusting mechanism is slidably mounted on the transverse guide rail, and the transverse adjusting mechanism and the lifting and adjusting mechanism form a motion adjustment in the XY axis direction; The lifting and adjusting mechanism includes: Lifting base; A lifting movable plate is installed on the lifting base; Several lifting drive components are installed on the lifting movable plate. The upper and lower detection brackets of the calibration detection combination bracket are independently driven and adjusted by the corresponding lifting drive components. The precision fine-tuning seat is located on the top of the lifting base. The precision fine-tuning seat is equipped with a fine-tuning screw, which is used to precisely control the position of the upper and lower detection brackets.

[0011] As a further aspect of the present invention: the auxiliary support portion is provided with: Base support block; The pusher telescopic rod is installed in the middle of the base support block; Sliding tracks are installed on both sides of the base support block; The bottom bracket is mounted above the base support block. The bottom bracket slides through the sliding track and is pushed by the pusher telescopic rod. The lateral adjustment mechanism is fixedly installed on the pusher telescopic rod.

[0012] As a further aspect of the present invention: the feeding workbench includes: Feeding host frame; The bottom support frame is installed at the bottom of the feeding host frame; A circular conveyor belt spread out on the feeding host frame; The end driven roller and the beginning driven roller are respectively installed at both ends of the feeding host frame; The drive roller is located at the bottom of the bottom support frame. The annular conveyor belt is supported by the drive roller, the end driven roller, and the beginning driven roller. The tensioning support roller is located near the end driven roller and provides a contact support to the outside of the annular conveyor belt so that the belt is taut into a planar structure. An elastic force sensor located at the bottom of the bottom support frame is used to sense the tension of the belt.

[0013] As a further aspect of the present invention: a micro pusher is installed on the fine-tuning pusher, and a telescopic pusher is provided at the pushing end of the micro pusher. The telescopic pusher is used to perform pulse-type touch correction on the side edge of the cardboard with a high-frequency, small-stroke motion. The alignment and detection assembly bracket is equipped with an edge sensing unit. The sensing end of the edge sensing unit feeds back to the controller. The controller drives the corresponding fine-tuning pusher to extend the telescopic push head according to the feedback signal, so as to perform end fine adjustment on the small tilt of the composite paperboard.

[0014] As a further embodiment of the present invention: the guiding sliding stage includes: Main load-bearing plate surface; A feed side guide port is provided on one inclined side of the main bearing plate, and the feed side guide port is used for connecting paperboard equipment; A rotary hinge section is located at the end of the main bearing plate, and the rotary hinge section is connected to the feeding worktable.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the guiding stage, the feeding and turnover module and the lateral limiting unit form the first line of defense for positioning, combining coarse and fine adjustments. The lateral limiting unit achieves coarse lateral adjustment through locking grooves, and precise fine adjustment in combination with vertical and lateral adjusting rods, which can quickly adapt to different widths of cardboard. The L-shaped feeding contact plate provides stable pushing force, and its top visual monitoring probe collects cardboard edge position data in real time, forming a visual-mechanical composite positioning with the lateral limiting unit, effectively solving the feeding deviation of long-sized composite cardboard caused by inertia or initial skew. The lateral adjustment mechanism and the lifting and adjusting mechanism on the feeding support frame constitute an XY axis full-range adjustment platform, which is deeply coupled with the dual-structure calibration and detection combination bracket: the lower detection bracket is in contact with the bottom surface of the conveyor belt to sense belt tension fluctuations, and the upper detection bracket has a slightly curved edge on the edge to sense cardboard warping or sudden thickness changes; the edge sensing unit uses differential wheel gap detection with small-diameter and large-diameter elastic contact wheels to convert belt offset into an electrical signal, which can distinguish between "belt misalignment" and "cardboard skew".

[0016] The fine-tuning actuator in the feed table exit area uses high-frequency, short-stroke pulse-type contact to perform end-point micro-correction on the side edge of the cardboard, avoiding edge damage to the high-speed moving cardboard caused by traditional rigid baffles. Overall, this invention significantly improves the positional accuracy and operational stability during the composite cardboard forming process through a four-level progressive correction architecture of coarse guidance, fine positioning, dynamic detection, and end-point micro-adjustment, effectively solving the problem of uneven edges caused by cumulative deviations when laminating multi-layer cardboard.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the automatic alignment feeding and forming equipment for composite paperboard provided in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the guide sliding stage provided in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the pusher turnover module provided in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the feeding workbench provided in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the side cross-sectional structure of the feeding workbench provided in an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the transverse adjustment mechanism and the lifting adjustment mechanism provided in the embodiments of the present invention.

[0025] Figure 7 This is a schematic diagram of the structure of the alignment and testing combination bracket provided in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of an edge sensing unit provided in an embodiment of the present invention.

[0027] In the diagram: 1. Guide assembly frame; 2. Guide sliding platform; 3. Material pushing and turnover module; 4. Lateral limiting unit; 5. Material feeding support frame; 6. Lateral adjustment mechanism; 7. Lifting and positioning mechanism; 8. Positioning and detection combination bracket; 9. Feeding workbench; 11. Load-bearing column frame; 12. Bottom support module; 13. Sheet material inlet connecting bracket; 14. Left wing support plate; 15. Module fixing base plate; 16. Right wing support plate; 17. Outer protective frame plate; 21. Main support plate surface; 22. Inlet... 23. Material side guide port; 31. Rotary hinge section; 32. Linear push module; 33. Precision guide rail; 34. Side wing sliding seat; 35. Push contact plate; 36. Top mounting bracket; 47. Vision monitoring probe; 48. Base support plate; 49. Assembly positioning plate; 40. Locking groove; 41. Adjustable support assembly; 42. Vertical adjustment rod; 53. Horizontal adjustment rod; 44. Side stop limiting plate; 55. Butt joint connecting seat; 56. Main load-bearing part; 57. Auxiliary support part; 68. Horizontal sliding mounting seat; 62. Transverse guide rail; 71. Lifting base; 72. Lifting movable plate; 73. Lifting drive component; 74. Precision fine-tuning seat; 75. Fine-tuning screw; 81. Upper detection bracket; 82. Lower detection bracket; 83. Detection reference plate; 84. Detection cantilever; 85. Detection connector; 86. Detection touch plate; 87. Edge sensing unit; 90. Circular conveyor belt; 91. Feeding main frame; 92. Bottom support frame; 93. Driven roller; 94. End driven roller; 95. Head driven roller; 9 6. Tensioning support roller; 98. Elastic force sensor; 99. Fine adjustment pusher; 531. Base support block; 532. Pusher telescopic rod; 533. Sliding track; 534. Bottom bracket; 871. Sensor mounting base; 872. Sensor mounting bracket; 873. Sensor detection rod; 874. Small diameter elastic contact wheel; 875. Large diameter elastic contact wheel; 981. Sensor base; 982. Spring bearing seat; 983. Elastic force sensing contact; 991. Miniature pusher; 992. Telescopic pusher. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. In the following description relating to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are schematic and not strictly drawn to scale, and the same or similar reference numerals denote the same or similar elements. In the following embodiments, the feeding direction of the composite paperboard is considered the front, and the left and right sides when the operator faces the equipment are considered the sides, to facilitate the description of the positional relationships of the components.

[0031] Example 1, please refer to Figures 1 to 5 An automatic alignment and feeding forming device for composite paperboard is provided. The device includes a guide assembly frame 1 serving as the overall supporting foundation, and a feeding support frame 5 connected to the rear end of the guide assembly frame 1. The guide assembly frame 1 is mainly composed of load-bearing uprights 11, which are frame structures welded from rectangular steel pipes. Anchor bolt holes are provided at the bottom for fixing to the workshop floor. A bottom support module 12 is horizontally installed on the upper part of the load-bearing uprights 11. This bottom support module 12 consists of multiple parallel I-beams, the upper surfaces of which are machined to ensure flatness. A guide sliding platform 2 is mounted above the bottom support module 12 for feeding the composite paperboard. The main body of the guide sliding platform 2 is a main bearing plate 21 made of a wear-resistant steel plate with a thickness of not less than 15mm. The left side of the main bearing plate 21 (with the feeding direction as the front, the left side when facing the equipment) extends obliquely to form a feeding side guide port 22. The opening angle of the feeding side guide port 22 is designed to be 30° to 45° to facilitate docking with the discharge end of the upstream cardboard feeding equipment (such as a cutting machine or unwinding rack). The end (i.e., the rear end) of the main bearing plate 21 is provided with a rotary hinge section 23. The rotary hinge section 23 includes a hinge shaft and a bearing seat, which allows the rear end of the guide sliding platform 2 to be tilted at a small angle relative to the feeding worktable 9 on the feeding support frame 5, thereby adapting to the transition connection of cardboard of different thicknesses.

[0032] A left wing support plate 14 is welded to the left side edge of the load-bearing column frame 11 (i.e., the left side when facing the equipment). The left wing support plate 14 is a triangular reinforcing rib plate with a horizontal upper surface and mounting screw holes. A module fixing base plate 15 is bolted to the left wing support plate 14. The module fixing base plate 15 is a precision-cast aluminum alloy plate, on which a pushing and turnover module 3 is mounted. The pushing and turnover module 3 is used to push the composite cardboard along the guide sliding table 2 from front to back and transfer the cardboard to the feeding worktable 9 on the subsequent feeding support frame 5. A right wing support plate 16 is also welded to the right side edge of the load-bearing column frame 11 (i.e., the right side when facing the equipment). A lateral limiting unit 4 is mounted on the right wing support plate 16. The lateral limiting unit 4 is used to limit the right edge of the composite cardboard to prevent the cardboard from tilting to the right during the pushing process.

[0033] The feeding support frame 5 is connected to the rear frame of the guide assembly frame 1 via a docking connector 51 at its front end. The docking connector 51 is a connecting plate with an elongated hole, which is connected to the corresponding screw hole on the rear side of the load-bearing column frame 11 by bolts, allowing for a small range of horizontal positional adjustments. The feeding support frame 5 is provided with a main support section 52, which is a rectangular frame welded from channel steel. The upper surface of the frame is used to support the feeding worktable 9. Auxiliary support sections 53 are provided on the bottom edge and side edges of the main support section 52 (i.e., the lower part and left and right sides of the frame). The auxiliary support sections 53 include vertical struts and diagonal braces to enhance the rigidity of the entire feeding support frame 5.

[0034] The feeding workbench 9 includes a feeding main frame 91, a bottom support frame 92 located at the bottom of the feeding main frame 91, and an annular conveyor belt 90 spread out on the feeding main frame 91. The feeding main frame 91 is a rectangular frame assembled from aluminum alloy profiles, and its length direction is consistent with the cardboard conveying direction. The front and rear ends of the feeding main frame 91 are respectively equipped with an end driven roller 94 and a first driven roller 95, wherein the first driven roller 95 is close to the rotary hinge section 23 of the guide sliding platform 2. A drive roller 93 is installed at the center of the bottom of the bottom support frame 92, and the drive roller 93 is driven by a servo motor through a reducer. The belt of the annular conveyor belt 90 passes around the drive roller 93, the end driven roller 94, and the first driven roller 95, forming a closed loop. The drive roller 93 is the power end, driving the belt movement through friction; the end driven roller 94 and the first driven roller 95 are supported at both ends of the belt and move accordingly. A tensioning support roller 96 is also provided on one side near the end driven roller 94. The tensioning support roller 96 is installed below the feeding host frame 91 and forms a contact support to the annular conveyor belt 90 from the outside of the belt (i.e. the non-bearing surface of the belt). By adjusting the vertical position of the tensioning support roller 96, the tension of the belt can be changed so that the belt remains taut on the working surface, avoiding unstable paperboard conveying due to slack.

[0035] During operation, the composite cardboard cut by the upstream equipment is first fed, either individually or continuously, into the feed side guide port 22 of the guide sliding table 2. Since the feed side guide port 22 is angled, it can initially guide the angle of entry of the cardboard, preventing the corners of the cardboard from colliding with the edge of the guide sliding table 2. Once the cardboard is fully inside the main support plate 21, the pushing and turnover module 3 begins to operate: the linear pushing module 31 (e.g., a linear motor or lead screw module) drives the side wing sliding seat 33 to move backward (i.e., towards the feeding support frame 5) along the precision guide rail 32. The pushing contact plate 34, fixedly installed on the side wing sliding seat 33, has an L-shaped structure, and its vertical surface abuts against the tail edge of the cardboard, thereby pushing the cardboard backward along the main support plate 21. Simultaneously, the lateral limiting unit 4 on the right side has been pre-adjusted, with its side stop limiting plate 47 maintaining a gap of approximately 1-2 mm with the right side edge of the cardboard, serving as an anti-deviation guide. After the cardboard is pushed past the rotary hinge section 23, its front end enters the annular conveyor belt 90 of the feeding worktable 9. The drive roller 93 starts under controller command, and the annular conveyor belt 90 begins to move forward (in the same direction as the push), further conveying the cardboard backward. During the conveying process, a dual-structure alignment and detection combination bracket 8 (not detailed in this embodiment) located above and below the surface of the annular conveyor belt 90 monitors the position of the cardboard and the belt's deviation. When the cardboard reaches the exit area of ​​the feeding worktable 9, several fine-tuning pushers 99 arranged along the side edge can perform micro-corrections at the end based on the detection signals. Finally, the cardboard enters the subsequent laminating or forming station with accurate position and orientation.

[0036] The core technology of this embodiment lies in constructing a basic channel from guiding to conveying, and introducing a coarse positioning defense line composed of a pushing and turnover module 3 and a lateral limiting unit 4. The pushing and turnover module 3 adopts a linear pushing method, which can provide a more stable and controllable pushing force compared with traditional roller friction feeding, especially suitable for composite paperboard with larger thickness and stronger rigidity. The design of the L-shaped pushing contact plate 34 ensures that the pushing force acts on the entire edge of the paperboard at the tail end, avoiding the crushing or skewing of the paperboard edge that may be caused by point contact. Although the adjustment structure of the lateral limiting unit 4 is not detailed in Embodiment 1, its existence itself provides a mechanical anti-deviation boundary. The rotary hinge section 23 at the end of the guide sliding platform 2 allows a smooth transition between the platform and the conveyor belt, reducing paperboard jamming caused by steps or sudden angle changes. The annular conveyor belt 90 is driven by an active roller 93 and cooperates with a tensioning support roller 96 to ensure constant tension of the belt during long-distance conveying, thereby reducing the probability of deviation caused by belt stretching deformation.

[0037] Example 2, this example is based on Example 1 above, such as... Figure 2 and Figure 3As shown, the specific structure of the lateral limiting unit 4 and the material pushing and turnover module 3 and their collaborative working method are further refined.

[0038] A base support plate 41, made of thick steel plate, is provided at the bottom of the lateral limiting unit 4. Its lower surface is in contact with the upper surface of the right wing support plate 16. Several parallel locking grooves 43 are formed on the right wing support plate 16 in the transverse direction (i.e., left-right direction). The grooves 43 are 12mm wide and 50mm apart. Several assembly positioning plates 42 are fixed below the base support plate 41. The shape of the assembly positioning plates 42 matches the locking grooves 43 and can slide into the corresponding locking grooves 43. When a coarse transverse adjustment is required, the locking bolt is loosened, and the base support plate 41 can move the entire lateral limiting unit 4 left and right along the locking grooves 43. After reaching the desired position, the locking bolt is tightened to fix it. This structure allows the lateral limiting unit 4 to quickly adapt to composite cardboard of different widths.

[0039] On the upper surface of the base support plate 41, two adjusting support assemblies 44 are spaced apart along the front-to-back direction. Each adjusting support assembly 44 includes an L-shaped support and two locking handles. A vertical adjusting rod 45 and a horizontal adjusting rod 46 are mounted on the adjusting support assembly 44. Specifically, the horizontal adjusting rod 46 is a precision screw with external threads, which passes through the horizontal hole of the adjusting support assembly 44 and is locked at both ends with nuts. By changing the extension length of the horizontal adjusting rod 46 relative to the adjusting support assembly 44, fine horizontal adjustment can be achieved. The vertical adjusting rod 45 is a lifting screw with scale markings. Its lower end is connected to the middle of the horizontal adjusting rod 46 through a cross connecting block, and its upper end passes through the vertical guide hole of the adjusting support assembly 44. A long strip-shaped side stop plate 47 is fixedly installed at the front ends of the two vertical adjusting rods 45 (i.e., on the side near the guide sliding table 2). The side stop plate 47 is made of wear-resistant nylon material, with a smooth surface and self-lubricating properties. The length of the side stop plate 47 is slightly greater than the length of the main bearing plate 21 of the guide sliding table 2, thereby continuously limiting the right side of the cardboard throughout the entire pushing stroke. By rotating the adjusting nut on the vertical adjusting rod 45, the height of the side stop plate 47 relative to the upper surface of the guide sliding table 2 can be changed to accommodate the side limit requirements of cardboard of different thicknesses.

[0040] The feeding and turnover module 3 is further refined as follows: The linear feeding module 31 adopts a rodless cylinder or ball screw type linear module, and its stroke matches the length of the guide sliding table 2. The precision guide rail 32 is a double-rail four-slider structure, ensuring that the straightness error of the side wing sliding seat 33 is less than 0.05mm / m. The feeding contact plate 34 installed on the side wing sliding seat 33 is an L-shaped structure. The height of its vertical part is 1.5 times the thickness of the cardboard, and the horizontal part is used to support the bottom of the cardboard tail end to prevent the cardboard from tilting during feeding. A layer of polyurethane elastic pad is pasted on the inner side of the vertical part of the feeding contact plate 34 to buffer the feeding impact and increase friction. The top of the feeding contact plate 34 (i.e., the horizontal upper surface of the L-shaped structure) is fixed with a top mounting bracket 35 by screws. The top mounting bracket 35 is an inverted L-shaped aluminum alloy bracket, and its cantilever end faces the direction of cardboard movement. A vision monitoring probe 36 is mounted on the lower side of the cantilever end of the top mounting bracket 35. This vision monitoring probe 36 is a high-resolution industrial camera, equipped with a ring light source, and its field of view covers the gap area between the right edge of the cardboard and the side stop limit plate 47. The vision monitoring probe 36 is connected to the controller via a data cable, which can acquire the position image of the cardboard edge in real time and calculate the deviation value between the cardboard edge and the baseline through image processing algorithms.

[0041] Before starting the equipment, the operator first performs a rough adjustment of the lateral limiting unit 4 according to the width of the composite paperboard to be processed: loosen the locking bolt on the locking groove 43, move the base support plate 41 in the left and right direction so that the side limit plate 47 is approximately located at the theoretical position of the right edge of the paperboard (for example, the width of the paperboard minus 5mm of the gap), and then tighten it. Next, a fine adjustment is performed: rotate the nuts at both ends of the transverse adjustment rod 46 to bring the side limit plate 47 closer to the edge of the paperboard until the gap is reduced to 0.5-1mm; then adjust the height of the side limit plate 47 by rotating the vertical adjustment rod 45 so that its lower edge is slightly higher than the upper surface of the guide sliding table 2 by 1-2mm to avoid scratching.

[0042] After the cardboard is fed into the guide slide table 2, the pusher turnover module 3 begins to push it. During the pushing process, the vision monitoring probe 36 continuously captures images of the right edge of the cardboard at a frequency of more than 30 frames per second. The controller analyzes the images in real time to obtain the actual position of the cardboard edge. If the gap between the cardboard edge and the side stop limit plate 47 is detected to be beyond the set range (e.g., greater than 2mm or less than 0.2mm), the controller will determine that the cardboard has been skewed. At this time, the controller sends a compensation signal to the drive motor of the linear push module 31 according to the skew direction, so that the side wing slide seat 33 generates a small lateral swing while moving in a straight line (e.g., by superimposing a lateral vibration or adjusting the pushing angle), thereby dynamically correcting the posture of the cardboard. This process forms a vision-mechanical composite positioning closed loop, that is, the vision monitoring probe 36 acts as the "eye" to perceive the deviation in real time, the pusher turnover module 3 acts as the "hand" to perform the correction action, and the lateral limit unit 4 acts as the "track" to provide the physical boundary.

[0043] The technical principle of this embodiment is based on a three-level composite positioning strategy of "coarse adjustment positioning + fine adjustment limiting + visual feedback". The sliding cooperation between the locking groove 43 and the assembly positioning plate 42 enables rapid and wide-range coarse adjustment, which is suitable for production scenarios where product specifications are frequently changed. The adjusting support assembly 44, together with the horizontal adjusting rod 46 and the vertical adjusting rod 45, can achieve micron-level fine position adjustment, ensuring the relative positional accuracy between the side limit plate 47 and the guide sliding stage 2. The visual monitoring probe 36 adopts non-contact detection, which will not damage the cardboard surface and can detect the dynamic skew trend of the cardboard during movement, rather than just the static position. The controller uses visual feedback signals to correct the pushing path of the pusher contact plate 34 in real time, which is equivalent to actively "straightening" the cardboard during the pushing process, rather than passively waiting for the cardboard to hit the side limit plate 47. This active correction method greatly reduces the frictional resistance between the edge of the cardboard and the side limit plate 47, avoiding burrs or breakage caused by friction on the edge of the cardboard. Meanwhile, the elastic pad design of the L-shaped pusher contact plate 34 makes the pushing force gentler and reduces the deflection caused by impact inertia.

[0044] Example 3, based on the above examples, such as Figure 7 and Figure 8As shown, the alignment and detection combination bracket 8 is designed with a dual structure, including an upper detection bracket 81 and a lower detection bracket 82, which are arranged in a mirror image. The combination bracket is mounted on the lifting movable plate 72 of the lifting and adjusting mechanism 7 (the specific structure of the lifting and adjusting mechanism 7 will be detailed in Embodiment 4). Each of the upper detection bracket 81 and the lower detection bracket 82 includes a detection reference plate 83, which is a precision-machined aluminum alloy plate with an anodized surface. Two detection cantilever arms 84 are bolted to each detection reference plate 83. The detection cantilever arms 84 are stainless steel rectangular tubes, with their length direction perpendicular to the cardboard conveying direction and extending towards the centerline of the circular conveyor belt 90. A detection contact plate 86 is installed at the end of each detection cantilever arm 84 via a detection connector 85. The detection connector 85 is an adjustable clamp, allowing the detection contact plate 86 to be finely adjusted in height and angle relative to the detection cantilever arm 84.

[0045] The detection contact plate 86 of the lower detection bracket 82 is a thin plate with a thickness of 1 mm and its lower surface is polished. The upper surface of the detection contact plate 86 is attached to the bottom plane of the lower belt body (i.e., the return section) of the annular conveyor belt 90, and the two maintain a slight contact pressure (about 0.5-1 N). To reduce friction, the upper surface of the detection contact plate 86 is coated with Teflon. The detection contact plate 86 of the upper detection bracket 81 adopts a different design: it is made of wear-resistant nylon, 3 mm thick, and is plate-shaped with a hollow structure (multiple circular or elliptical through holes to reduce the contact area with the cardboard). The edges of the upper detection contact plate 86 (especially the leading edge near the cardboard in the feeding direction) are provided with slightly curved edges, that is, the edges are raised about 0.5 mm, forming a smooth transition surface. This design allows the cardboard edge to contact the slightly curved edges first when there is warping or abrupt change in thickness, generating a flexible lifting force instead of a rigid collision.

[0046] Edge sensing units 87 are installed on both the upper and lower detection cantilever arms 84. Each edge sensing unit 87 includes a sensing mounting base 871, which is mounted on the detection cantilever arm 84 via a slider and can slide along the length direction (i.e., laterally) of the detection cantilever arm 84. After sliding into place, it is locked by a set screw. A sensing mounting bracket 872 is installed on the sensing mounting base 871. The sensing mounting bracket 872 has a C-shaped opening structure. Two sensing probes 873 are respectively installed on the upper and lower opposing arms of the sensing mounting bracket 872, one located at the top and the other at the bottom, coaxially opposite each other. A small-diameter elastic contact wheel 874 is installed at the end of the upper sensing probe 873, and a large-diameter elastic contact wheel 875 is installed at the end of the lower sensing probe 873. The diameter of the small-diameter elastic contact wheel 874 is approximately 10 mm, and the diameter of the large-diameter elastic contact wheel 875 is approximately 20 mm. Both are made of polyurethane material and have a certain degree of elasticity. During installation, the position of the sensor mounting base 871 is adjusted so that the edge of the lower layer of the annular conveyor belt 90 is precisely positioned within the gap between the small-diameter elastic contact wheel 874 and the large-diameter elastic contact wheel 875. The small-diameter elastic contact wheel 874 presses against the edge of the upper surface of the belt, while the large-diameter elastic contact wheel 875 supports the edge of the belt from below. The gap between the two elastic contact wheels is slightly smaller than the belt thickness (e.g., if the belt thickness is 2mm, the gap is set to 1.8mm), forming a "gap detection" structure. The sensor probe 873 integrates a high-precision displacement sensor (such as an LVDT or optical encoder). When the edge of the belt shifts vertically or horizontally, it pushes the small-diameter elastic contact wheel 874 or the large-diameter elastic contact wheel 875, thereby causing a minute displacement of the sensor probe 873. This displacement is converted into a 0-10V analog electrical signal or a digital pulse signal.

[0047] An elastic force sensor 98 is also installed at the bottom of the bottom support frame 92 of the feeding workbench 9. This elastic force sensor 98 includes a sensor base 981, a spring support 982 mounted on the sensor base 981, and an elastic force sensing contact 983 mounted on the spring support 982. A pre-compression spring is installed inside the spring support 982, and the elastic force sensing contact 983 presses upward against the lower layer of the annular conveyor belt 90 to sense changes in belt tension in real time. When the belt tension fluctuates due to temperature, wear, or loosening of the tensioning mechanism, the compression of the elastic force sensing contact 983 changes accordingly, outputting a corresponding signal.

[0048] Before operating the equipment, the lateral position of the edge sensing unit 87 needs to be adjusted according to the width of the cardboard and the position of the conveyor belt. Loosen the set screw of the sensing fixing seat 871 and slide it along the detection cantilever 84 so that the edge of the annular conveyor belt 90 accurately enters the gap between the small-diameter elastic contact wheel 874 and the large-diameter elastic contact wheel 875, and then lock it. Next, adjust the overall height of the upper detection bracket 81 and the lower detection bracket 82 through the lifting and adjusting mechanism 7 so that the lower detection contact plate 86 just contacts the bottom plane of the belt body, and the distance between the upper detection contact plate 86 and the upper surface of the belt body is slightly greater than the thickness of the cardboard (for example, if the cardboard thickness is 5mm, the spacing is set to 6mm).

[0049] When the equipment is operating normally, the annular conveyor belt 90 circulates under the drive of the drive roller 93. The lower detection contact plate 86 is always in contact with the bottom plane of the belt to sense changes in the flatness of the belt. If the belt develops local bumps or waves due to fatigue or uneven tension, the lower detection contact plate 86 will produce slight undulations, which are transmitted to the edge sensing unit 87 through the detection cantilever 84, manifesting as fluctuations in the vertical direction of the belt edge. At the same time, the elastic force sensor 98's elastic force sensor contact 983 continuously monitors the average value and instantaneous fluctuations of the belt tension. The upper detection contact plate 86 does not directly contact the cardboard (the gap is about 1 mm under normal circumstances). Only when the cardboard warps (e.g., the edge curls up) or there is a local change in thickness (e.g., at the overlap of multiple layers of cardboard) will the cardboard touch the slightly curved edge of the upper detection contact plate 86, generating a gentle contact force, which is also sensed by the edge sensing unit 87.

[0050] The two sensing probes 873 of the edge sensing unit 87 detect the vertical and horizontal offsets of the belt edge, respectively. Specifically, the differential arrangement of the small-diameter elastic contact wheel 874 and the large-diameter elastic contact wheel 875 can distinguish between in-plane offset (deviation) and out-of-plane offset (warping) of the belt. When the belt deviates laterally, the belt edge simultaneously pushes the small-diameter elastic contact wheel 874 and the large-diameter elastic contact wheel 875 to move laterally, and the two sensing probes 873 output displacement signals in the same direction. When the belt bounces vertically or the tension changes, causing the belt to tilt, the small-diameter elastic contact wheel 874 and the large-diameter elastic contact wheel 875 will generate opposite displacement signals (one is pressed in, and the other is released). The controller receives multiple signals from the upper and lower edge sensing units 87 and the elastic force sensor 98, and through algorithm decoupling, can accurately distinguish different types of deviations such as "belt deviation", "belt tension fluctuation", "cardboard skew", and "cardboard warping".

[0051] Traditional single-sided photoelectric sensors can only detect whether the belt edge has crossed the boundary, and cannot distinguish between offset direction and disturbances caused by multiple factors. This design, however, employs a differential elastic contact wheel structure. Utilizing the geometric differences and relative positions of the large and small diameter contact wheels, it converts the two-dimensional motion (lateral + vertical) of the belt edge into independent displacements of two sensing rods, achieving two-dimensional decoupled detection. Simultaneously, two sets of detection brackets, mirrored vertically, target the belt (lower) and cardboard (upper) respectively. The lower detection bracket primarily monitors the stability of the conveyor system itself (e.g., belt deviation, tension fluctuations), while the upper detection bracket monitors the state of the conveyed cardboard (e.g., skewness, warping). This layered detection allows the control system to pinpoint the source of deviation: if the lower detection bracket signal is abnormal while the upper bracket is normal, it indicates a problem with the conveyor belt itself, requiring adjustment of the fine-tuning motor of the drive roller 93 or the tension support roller 96; if the lower detection bracket signal is normal while the upper detection bracket signal is abnormal, it indicates skewness or deformation of the cardboard itself, requiring correction via the lateral adjustment mechanism 6 or the fine-tuning pusher 99. The elastic force sensor 98 provides global information on the belt tension, which can be used to determine whether the tension support roller 96 needs adjustment or whether the drive roller 93 is slipping.

[0052] Example 4, based on the above examples, such as Figure 6 and Figure 7 As shown, this embodiment describes in detail the structure and working principle of the horizontal adjustment mechanism 6, the lifting and lowering adjustment mechanism 7, and the fine adjustment pusher 99.

[0053] Inside the auxiliary support section 53 of the feeding support frame 5, a base support block 531 is provided. This base support block 531 is a cast iron square box, fixed to the ground by anchor bolts. A pusher telescopic rod 532 is installed in the middle of the base support block 531. This pusher telescopic rod 532 is an electric push rod or a hydraulic cylinder. A sliding rail 533 is provided on each of the two sides (left and right sides) of the base support block 531. The sliding rail 533 is a linear guide rail pair. A bottom bracket 534 is mounted above the base support block 531. The bottom bracket 534 is a rectangular steel plate frame, and its lower surface slides in contact with the sliding rail 533 via a slider. The extended end of the pusher telescopic rod 532 is hinged to the rear end of the bottom bracket 534. When the pusher telescopic rod 532 extends or retracts, it drives the bottom bracket 534 to move back and forth along the sliding rail 533. The horizontal adjustment mechanism 6 is fixedly installed on the upper surface of the bottom bracket 534, so the horizontal adjustment mechanism 6 can move back and forth with the bottom bracket 534 as a whole.

[0054] The transverse adjustment mechanism 6 includes a transverse mounting base 61, which is a U-shaped channel steel with its opening facing upwards. A transverse guide rail 62 is mounted on the top of the transverse mounting base 61 along the transverse (left-right) direction. The transverse guide rail 62 is a precision ball-bearing linear guide rail, the length of which matches the width of the feeding worktable 9. The lifting base 71 of the lifting and positioning mechanism 7 is slidably mounted on the transverse guide rail 62 via a slider and is driven by a transverse drive motor (not shown in the figure) through a lead screw to achieve precise positioning in the left-right direction. The transverse adjustment mechanism 6 and the lifting and positioning mechanism 7 together constitute the XY-axis (transverse and longitudinal) motion adjustment platform. It should be noted that the longitudinal movement is provided by the pusher telescopic rod 532, and the transverse movement is provided by the transverse adjustment mechanism 6.

[0055] The lifting and adjusting mechanism 7 includes a lifting base 71 and a lifting movable plate 72 mounted on the lifting base 71. The lifting base 71 is a rectangular box, inside which are installed two independent lifting drive components 73, each of which is a ball screw jack driven by a stepper motor. The upper detection bracket 81 and the lower detection bracket 82 of the calibration and detection combination bracket 8 are respectively fixed on two different lifting movable plates 72, and each lifting movable plate 72 is independently driven to rise and fall by the corresponding lifting drive component 73. In this way, the height of the upper detection bracket 81 and the lower detection bracket 82 can be adjusted independently without interference. A precision fine-tuning seat 74 is also provided on the top of the lifting base 71. This precision fine-tuning seat 74 is a manual fine-tuning platform with a fine-tuning screw 75 mounted on it, used to precisely calibrate the initial position of the upper detection bracket 81 and the lower detection bracket 82 during installation or maintenance, with an adjustment accuracy of up to 0.01mm.

[0056] Several independent fine-tuning actuators 99 are respectively installed on the side edges (left and right sides) of the exit area of ​​the feeding workbench 9 (i.e., the rear end of the circular conveyor belt 90, near the end driven roller 94). Each fine-tuning actuator 99 includes a micro actuator 991, which is a piezoelectric ceramic actuator or voice coil motor with a response frequency of over 1000Hz. The pushing end of the micro actuator 991 is equipped with a telescopic push head 992, the end of which is hemispherical and made of wear-resistant ceramic to reduce friction with the side edge of the cardboard. The fine-tuning actuators 99 are arranged along the conveying direction with a spacing of about 50-100mm, forming a "finger-tip" correction array. All fine-tuning actuators 99, edge sensing unit 87, vision monitoring probe 36, elastic force sensor 98, drive motor of pusher turnover module 3, drive motor of active roller 93, and drive motor of transverse adjustment mechanism 6 are connected to the same central controller (PLC or industrial computer).

[0057] During equipment operation, the controller first automatically calculates the initial positions of each actuator based on preset cardboard parameters (width, thickness, material). The pusher telescopic rod 532 extends, sending the bottom bracket 534, along with the lateral adjustment mechanism 6 and the lifting adjustment mechanism 7, to a suitable front-to-back position (i.e., Y-axis position), so that the alignment detection combination bracket 8 is located in the middle-to-rear section of the circular conveyor belt 90, ensuring sufficient detection distance. The lateral drive motor drives the lifting adjustment mechanism 7 to move along the lateral guide rail 62, aligning the alignment detection combination bracket 8 with the width center of the circular conveyor belt 90 or the theoretical edge position of the cardboard (X-axis position). Then, the lifting drive component 73 adjusts the heights of the upper detection bracket 81 and the lower detection bracket 82 respectively, so that the lower detection contact plate 86 lightly touches the bottom surface of the belt, while the upper detection contact plate 86 maintains a set gap with the upper surface of the belt.

[0058] Once the cardboard enters the annular conveyor belt 90 from the guide slide table 2, the drive roller 93 starts, driving the cardboard backward. During this process, the edge sensing unit 87 of the lower detection bracket 82 continuously monitors the conveyor belt's deviation. If belt deviation is detected (e.g., the belt edge shifts to the right by 0.5mm), the controller sends a command to the fine-tuning motor of the drive roller 93 (the drive roller 93 is mounted on a laterally swingable bearing seat), causing a slight tilt of the drive roller 93's axis, thereby guiding the conveyor belt to automatically return to the correct position. Simultaneously, the elastic force sensor 98 monitors the belt tension; if the tension fluctuation exceeds a threshold, the controller adjusts the clamping force of the tension support roller 96.

[0059] When the front end of the cardboard passes the upper detection bracket 81, the detection touch plate 86 and edge sensing unit 87 of the upper detection bracket 81 begin to detect the position and orientation of the cardboard. If an overall cardboard skew is detected (e.g., the front end of the cardboard is skewed to the left and the rear end to the right), the controller will calculate the skew angle and direction. Depending on the degree of skew, the controller will take a three-level response: for slight skew less than 0.5°, no active correction is performed, only recording is performed; for moderate skew between 0.5° and 2°, the controller will drive the lateral adjustment mechanism 6 to make the entire alignment detection combination bracket 8 move laterally synchronously with the skew trend of the cardboard, while adjusting the differential speed on both sides of the active roller 93 (if the active roller 93 is driven by dual motors) to achieve flexible guidance of the cardboard orientation; for severe skew greater than 2°, the controller will send a signal to the feeding and turnover module 3 to perform compensation during the feeding stage.

[0060] As the cardboard continues to be conveyed to the exit area of ​​the feeding table 9, if the edge sensing unit 87 detects a residual skew angle (typically a small skew of less than 0.5°) at the end of the cardboard, the controller triggers the fine-tuning pushers 99 for dynamic micro-correction at the end. Specifically, the controller selectively triggers one or more fine-tuning pushers 99 on the corresponding side (left or right) based on the direction and magnitude of the cardboard skew. The micro-pushers 991 drive the telescopic pushers 992 to extend and retract at frequencies up to several hundred hertz, with an extension length of only 0.1-0.5 mm, performing pulsed, high-frequency touch correction on the side edge of the cardboard. This "tapping" correction does not cause a violent impact on the cardboard, but rather gradually corrects the cardboard's heading angle through accumulated small displacements. The array of fine-tuning pushers 99 arranged along the conveying direction can select different triggering sequences according to the shape of the cardboard skew (such as an S-shaped bend), for example, triggering the pushers at the front end first, and then triggering the pushers at the rear end, forming a "wave-like" correction.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic correction feeding and forming equipment for composite paperboard, comprising a guide assembly frame (1) and a feeding support frame (5) connected to the guide assembly frame (1). The guide assembly frame (1) includes a load-bearing column frame (11), a bottom support module (12) is provided on the load-bearing column frame (11), and a guide sliding platform (2) for cardboard feeding input is mounted on the bottom support module (12); characterized in that: A left wing support plate (14) is provided on one side of the load-bearing column frame (11). A pusher turnover module (3) for pushing the composite cardboard along the guide sliding platform (2) is installed on the left wing support plate (14). A right wing support plate (16) is provided on the other side of the load-bearing column frame (11), and a lateral limiting unit (4) for limiting the other side of the composite paperboard is installed on the right wing support plate (16). The feeding support frame (5) is connected to the guide assembly frame (1) through the docking connection seat (51). The feeding support frame (5) is provided with a main support part (52), and a feeding worktable (9) is mounted on the main support part (52). The bottom edge and side edge of the main support part (52) are provided with auxiliary support parts (53). A transverse adjustment mechanism (6) is provided on the side edge of the auxiliary support part (53). A lifting adjustment mechanism (7) is slidably installed on the transverse adjustment mechanism (6). A double-structured calibration and detection combination bracket (8) is provided on the lifting adjustment mechanism (7) in a lifting manner. The calibration and detection combination bracket (8) has two layers and is located at the upper and lower positions of the belt surface of the feeding workbench (9). Several fine-tuning actuators (99) are provided on the side edge of the outlet area of ​​the feeding workbench (9). The material pushing and turnover module (3) and the lateral limiting unit (4) form a positioning defense line that combines coarse and fine positioning. The transverse adjustment mechanism (6), the lifting and adjusting mechanism (7), the alignment and detection combination bracket (8), and the fine adjustment pusher (99) constitute a multi-level linkage correction closed-loop system.

2. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The lateral limiting unit (4) includes: The base support plate (41) is fixed on the right wing support plate (16). The right wing support plate (16) is provided with several locking grooves (43). The base support plate (41) is slidably installed in the corresponding locking grooves (43) by several assembly positioning plates (42) and fixed by locking bolts to achieve lateral coarse adjustment. Several adjustable support assemblies (44) are provided on the base support plate (41). The adjustable support assembly (44) is provided with a vertical adjustment rod (45) and a horizontal adjustment rod (46). The horizontal adjustment rod (46) adjusts the installation position through the adjustable support assembly (44). A side stop limiting plate (47) is fixedly installed at the front end of the vertical adjustment rod (45). The side stop limiting plate (47) is located on the side edge of the guide sliding platform (2) and is used to adjust the position of the side stop limiting plate (47) laterally to adapt to cardboard of different widths.

3. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The material pusher turnover module (3) includes: Linear translation module (31); Precision guide rail (32) is set on the linear motion module (31); Side wing sliding seat (33) is slidably mounted on precision guide rail (32); The pusher plate (34) with an L-shaped structure is set on the side wing sliding seat (33) and is used to abut against the edge of the composite paperboard; Top mounting bracket (35) is provided on the pusher contact plate (34); The visual monitoring probe (36) installed on the top mounting bracket (35) is used to collect the edge position data of the cardboard in real time and form a visual-mechanical composite positioning with the lateral limiting unit (4).

4. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The calibration detection assembly bracket (8) includes an upper detection bracket (81) and a lower detection bracket (82), both of which include: Test reference plate (83); The detection cantilever (84) is set on the detection reference plate (83); The detection contact plate (86) is installed on the detection cantilever (84) via the detection connector (85); Among them, the detection touch plate (86) located on the lower layer is attached to the bottom plane of the belt of the feeding worktable (9) to sense the belt tension fluctuation, and the detection touch plate (86) located on the upper layer has a slightly curved edge on the edge for non-contact sensing of cardboard warping or thickness change. Edge sensing units (87) are provided on the detection cantilever (84) on both the upper and lower sides to distinguish between two types of deviations: belt misalignment and cardboard skewness.

5. The automatic alignment feeding and forming equipment for composite paperboard according to claim 4, characterized in that: The edge sensing unit (87) includes: The sensor mounting base (871) is installed on the detection cantilever (84) and its position can be adjusted along the detection cantilever (84); The sensor mounting bracket (872) is mounted on the sensor mounting base (871). Two sensor probes (873) are mounted on the sensor mounting bracket (872), and the ends of the two sensor probes (873) are respectively provided with a small-diameter elastic contact wheel (874) and a large-diameter elastic contact wheel (875). The edge of the belt of the feeding table (9) is located between the small-diameter elastic contact wheel (874) and the large-diameter elastic contact wheel (875), forming a wheel gap detection mechanism to convert the belt edge offset into an electrical signal.

6. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The top of the transverse adjustment mechanism (6) is provided with a transverse mounting base (61), and a transverse guide rail (62) is provided on the transverse mounting base (61). The lifting and adjusting mechanism (7) is slidably installed on the transverse guide rail (62), and the transverse adjusting mechanism (6) and the lifting and adjusting mechanism (7) form a motion adjustment in the XY axis direction; The lifting and adjusting mechanism (7) includes: Lifting base (71); The lifting movable plate (72) is installed on the lifting base (71); Several lifting drive components (73) are set on the lifting movable plate (72). The upper detection bracket (81) and lower detection bracket (82) of the calibration detection combination bracket (8) are independently driven and adjusted by the corresponding lifting drive components (73). A precision fine-tuning seat (74) is set on the top of the lifting base (71). A fine-tuning screw (75) is set on the precision fine-tuning seat (74) for precisely controlling the position of the upper detection bracket (81) and the lower detection bracket (82).

7. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The auxiliary support part (53) is provided with: Base support block (531); The pusher telescopic rod (532) is installed in the middle of the base support block (531); Sliding rails (533) are provided on both sides of the base support block (531). The bottom bracket (534) is mounted on the base support block (531). The bottom bracket (534) slides through the sliding track (533) and is pushed by the pusher telescopic rod (532). The lateral adjustment mechanism (6) is fixedly installed on the pusher telescopic rod (532).

8. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The feeding workbench (9) includes: Feeding host frame (91); Bottom support frame (92) is installed at the bottom of the feeding host frame (91); A circular conveyor belt (90) is laid out on the feeding host frame (91). The end driven roller (94) and the beginning driven roller (95) are respectively set at both ends of the feeding host frame (91). The drive roller (93) is located at the bottom of the bottom support frame (92), and the annular conveyor belt (90) is supported by the drive roller (93), the end driven roller (94), and the beginning driven roller (95); The tensioning support roller (96) is located on the side near the end driven roller (94). The tensioning support roller (96) forms a contact support on the outside of the annular conveyor belt (90) so that the belt body is taut into a planar structure. An elastic force sensor (98) is installed at the bottom of the bottom support frame (92) to sense the tension of the belt.

9. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The fine-tuning pusher (99) is equipped with a micro pusher (991), and the push end of the micro pusher (991) is provided with a telescopic pusher (992). The telescopic pusher (992) is used to perform pulse-type touch correction on the side edge of the cardboard with a high-frequency small stroke action. The alignment and testing combination bracket (8) is equipped with an edge sensing unit (87). The sensing end of the edge sensing unit (87) feeds back to the controller. The controller drives the corresponding fine adjustment pusher (99) to extend the telescopic pusher (992) according to the feedback signal to perform end fine adjustment on the small tilt of the composite paperboard.

10. The automatic alignment feeding and forming equipment for composite paperboard according to claim 1, characterized in that: The guide sliding platform (2) includes: Main load-bearing plate surface (21); A feed side guide (22) is provided on one oblique side of the main bearing plate (21), the feed side guide (22) being used for connecting paperboard equipment; A rotary hinge section (23) is provided at the end of the main bearing plate (21), and the rotary hinge section (23) is connected to the feeding worktable (9).

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