A pretreatment and straightening device for ship steel plates

Abstract

This invention discloses a pretreatment and straightening device for ship steel plates, relating to the technical field of metal material processing. The invention includes a conveying mechanism, a flattening mechanism, and a deviation detection mechanism. The deviation detection mechanism includes a first detection section and a second detection section spaced apart along the conveying direction. The first detection section detects the position of the steel plate on a first side of the incoming material, and the second detection section detects the position of the steel plate on a second side of the downstream material. A correction mechanism is installed on the conveying mechanism, located downstream of the deviation detection mechanism, and is used to correct the deviation of the steel plate based on the first and second side positions. The flattening mechanism eliminates deformation caused by steel plate stacking and transfer, ensuring uniform shot blasting without missed or over-blasting, thoroughly removing rust residue. Simultaneously, the correction mechanism ensures precise steel plate positioning, guaranteeing full coverage by the spray gun and uniform paint film thickness, improving coating adhesion, adapting to harsh marine conditions, eliminating corrosion entry points, and extending the hull's corrosion protection life.

Description

Technical Field

[0001] This invention relates to the technical field of metal material processing, specifically to a pretreatment and straightening device for ship steel plates. Background Technology

[0002] Before entering the pre-processing line, steel plates used in shipbuilding typically undergo stacking, transfer, and cutting processes. This process is highly susceptible to two main problems affecting the steel plates: Plate shape defects: Due to their own weight or uneven heating, steel plates often exhibit localized unevenness or overall bending, resulting in decreased flatness. Direct shot blasting or spraying will cause uneven surface treatment, affecting coating adhesion and corrosion resistance life.

[0003] Conveyor deviation: During long-distance roller conveyor transport, due to roller wear and the placement of the steel plate itself, the steel plate is prone to deviation in the width direction. If the deviation is too large, it may collide with the frame on the side of the conveyor roller, causing equipment damage. It may also cause the edge of the steel plate to exceed the coverage of the subsequent spray gun, resulting in quality problems such as missed spraying or over-spraying.

[0004] Therefore, designing a pretreatment correction device that can simultaneously solve the problems of steel plate flatness correction and conveying position correction is of great significance for improving the pretreatment quality of ship steel plates and the automation level of the production line. Summary of the Invention

[0005] To solve the above problems, namely the problems mentioned in the background art, the present invention proposes a pretreatment and straightening device for ship steel plates, which includes a conveying mechanism for carrying and conveying steel plates, a flattening mechanism for initially flattening the steel plates is provided above the conveying mechanism, and an offset detection mechanism is installed on the flattening mechanism. The offset detection mechanism includes a first detection section and a second detection section arranged at intervals along the conveying direction. The first detection section is used to detect the first side position of the steel plate on the incoming side, and the second detection section is used to detect the second side position of the steel plate on the downstream side. The conveying mechanism is equipped with a correction mechanism, which is located downstream of the offset detection mechanism and is used to correct the offset steel plate according to the first side position and the second side position.

[0006] A further embodiment of the present invention is that the flattening mechanism includes a bracket mounted above the conveying mechanism, a liftable base installed inside the bracket, a driving component connected to the base for driving the base to rise and fall, at least one pressure roller rotatably mounted on the base for pressing against the surface of the steel plate after the base descends, and an offset detection mechanism mounted on the base and rising and falling synchronously with the base.

[0007] A further configuration of the present invention is as follows: the first detection unit includes a plurality of first detectors arranged in an array along the width direction of the steel plate, and the second detection unit includes a plurality of second detectors arranged in an array along the width direction of the steel plate.

[0008] A further feature of the present invention is that the first detector and the second detector are both photoelectric sensors, and each photoelectric sensor independently detects whether there is a steel plate blocking its corresponding position and outputs a corresponding detection signal.

[0009] A further provision of the present invention includes a controller, which is electrically connected to the first detection unit, the second detection unit, and the correction mechanism. The controller is used to receive a first side position detected by the first detection unit and a second side position detected by the second detection unit, compare the first side position and the second side position, determine the offset direction of the steel plate based on the comparison result, and generate a control command based on the offset direction and send it to the correction mechanism.

[0010] A further configuration of the present invention is as follows: the correction mechanism includes a base, on which a correction roller for contacting and guiding the steel plate is rotatably mounted; the base is connected to a drive motor via two meshing gears; the drive motor receives a control command to drive the base to rotate the correction roller in a horizontal plane. A further provision of the present invention is that the correction mechanism further includes two clamping components arranged opposite to each other, respectively disposed on the lateral sides of the base, for moving towards each other to clamp the steel plate from both sides when the correction roller rotates to correct the deviation, thereby assisting in the straightening of the steel plate.

[0011] A further provision of the present invention is that the controller controls the rotation direction of the drive motor according to the determined steel plate offset direction, so that the drive motor drives the correction roller to rotate to the side opposite to the steel plate offset direction.

[0012] A further configuration of the present invention is as follows: the clamping assembly includes two first connecting rods, the first ends of the two first connecting rods are rotatably connected to the lateral sides of the base, the second ends of the two first connecting rods are rotatably connected to the first end of a second connecting rod, the lateral sides of the conveying mechanism are respectively fixedly provided with limiting housings, the second ends of the two second connecting rods are respectively slidably inserted into the corresponding limiting housings, each of the two second connecting rods is equipped with an installation platform, a multi-stage telescopic rod is installed on the installation platform, the telescopic end of the multi-stage telescopic rod is connected to a limiting clamping plate, and multiple flexible limiting wheels are vertically arranged on the limiting clamping plate.

[0013] The beneficial technical effects of this invention are as follows: by using a flattening mechanism to eliminate the deformation caused by the stacking and transportation of steel plates, it ensures uniform shot blasting without any missed or over-blasting, and thoroughly removes rust residue. At the same time, by using precise correction, it ensures accurate positioning of the steel plates, guarantees full coverage of the spray gun and uniform paint film thickness, significantly improves coating adhesion, adapts to the harsh working conditions of ships and oceans, eliminates corrosion breakthroughs from the source, and extends the anti-corrosion life of the hull.

[0014] The device adopts an automatic closed-loop correction system, which requires no manual intervention. It can effectively avoid equipment interference and downtime caused by steel plate misalignment, reduce maintenance costs, ensure the efficient and safe operation of the ship automation production line, and increase production capacity.

[0015] The device is flexibly adjustable to fit various types of marine steel plates of different thicknesses and specifications. Its flexible design does not damage the plate surface, ensuring the quality of subsequent cutting and welding processes and further ensuring the safety of the ship's structure.

[0016] In summary, this device can effectively solve the problems of steel plate pretreatment deviation and poor flatness, enhance corrosion protection, improve production efficiency, and meet the needs of shipbuilding. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the present invention is shown.

[0018] Figure 2 The bottom view of the first and second detection units is shown.

[0019] Figure 3 A schematic diagram of the correction mechanism is shown.

[0020] Reference numerals: 1. Conveying mechanism; 2. Flattening mechanism; 21. Support; 22. Base; 23. Driving component; 24. Pressure roller; 3. Offset detection mechanism; 31. First detection unit; 311. First detector; 32. Second detection unit; 321. Second detector; 4. Correction mechanism; 41. Base; 42. Correction roller; 43. Gear; 44. Drive motor; 45. Clamping assembly; 451. First connecting rod; 452. Second connecting rod; 453. Limiting housing; 454. Mounting platform; 455. Multi-stage telescopic rod; 456. Limiting clamping plate; 457. Flexible limiting wheel. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] Example 1: As Figure 1As shown in the figure, this embodiment provides a ship steel plate pretreatment straightening device, which is mainly used to correct the flatness and positional deviation of steel plates entering the pretreatment production line (such as before shot blasting and spraying) to ensure the smooth progress of subsequent processes.

[0023] The device mainly includes a conveying mechanism 1, a flattening mechanism 2, an offset detection mechanism 3, a correction mechanism 4, and a controller.

[0024] Conveying mechanism 1 is the foundation of the entire device, used to carry and move along a predetermined direction (such as...). Figure 1 (As indicated by the middle arrow) Conveying steel plates. In this embodiment, the conveying mechanism 1 consists of multiple sets of motor-driven rollers. The roller surfaces may optionally be covered with a material to increase friction, ensuring that the steel plates can move forward smoothly and continuously.

[0025] The flattening mechanism 2 is mounted above the conveying mechanism 1 and is used to initially flatten the passing steel plate, eliminating local bending or waviness deformation caused by storage or transportation. Specifically, the flattening mechanism 2 includes a support 21 spanning above the conveying mechanism 1. A liftable base 22 is installed inside the support 21, and the base 22 is connected to a drive element 23 (e.g., a hydraulic cylinder, pneumatic cylinder, or electric actuator). The drive element 23 is fixedly mounted on the top of the support 21, and its telescopic end is connected to the base 22, used to drive the base 22 to move up and down relative to the conveying plane of the conveying mechanism 1. At least one pressure roller 24 is rotatably mounted below the base 22. When the steel plate is conveyed, the drive element 23 drives the base 22 to descend, causing the pressure roller 24 to press against the upper surface of the steel plate. As the steel plate moves, the pressure roller 24 passively rotates, thereby achieving the rolling and flattening of the steel plate.

[0026] The offset detection mechanism 3 is fixedly mounted on the liftable base 22, maintaining a fixed relative position with the pressure roller. This avoids the risk of detector impact caused by changes in steel plate thickness or front-end warping, improving the reliability and safety of the equipment. At the same time, this installation simplifies the mechanical structure, eliminating the need for a separate bracket and adjustment mechanism for the detector.

[0027] The offset detection mechanism 3 is used to monitor the positional offset of the steel plate during the conveying process in real time. For example... Figure 2 As shown, it consists of a first detection unit 31 and a second detection unit 32 arranged at intervals along the steel plate conveying direction. The first detection unit 31 is located on the side closer to the steel plate in the feeding direction (upstream) and is used to detect the first side position of the steel plate at that location; the second detection unit 32 is located on the side closer to the steel plate in the unfeeding direction (downstream) and is used to detect the second side position of the steel plate at that location. Figure 2As shown, the first detection unit 31 includes a plurality of first detectors 311 mounted through mounting holes and arranged in a uniform array along the width direction of the steel plate. Similarly, the second detection unit 32 also includes a plurality of second detectors 321 mounted through mounting holes and arranged in a uniform array along the width direction of the steel plate. In this embodiment, both the first detectors 311 and the second detectors 321 are photoelectric sensors. Each photoelectric sensor operates independently. When the steel plate passes under it, it blocks the light, and the sensor outputs a high-level signal; if there is no steel plate blocking the light, it outputs a low-level signal. By reading the signal combination of these sensors, the controller can determine the specific position of the steel plate in the width direction, specifically the coordinates of its two side edges.

[0028] The correction mechanism 4 is mounted on the conveying mechanism 1 and located downstream of the offset detection mechanism 3. Its function is to receive commands from the controller and dynamically correct any detected offset in the steel plate. The core component of the correction mechanism 4 is a rotatable base 41 on which a correction roller 42 is rotatably mounted. The correction roller 42 contacts the lower surface of the conveyed steel plate. The base 41 is connected to a drive motor 44 via two meshing gears 43. The drive motor 44 (such as a servo motor) receives control commands from the controller and precisely drives the base 41 to rotate the correction roller 42 by a certain angle in the horizontal plane. When the axis of the correction roller 42 is not perpendicular to the conveying direction of the steel plate, it generates a lateral frictional force on the steel plate passing over it, thereby guiding the steel plate back to the correct running trajectory.

[0029] The controller can be a PLC or an industrial control computer. It is electrically connected to the drive motor 44 of the first detection unit 31, the second detection unit 32, and the correction mechanism 4, respectively. Its operating procedure is as follows: 1. Data acquisition: The first detection unit 31 and the second detection unit 32 are set at intervals along the conveying direction to continuously detect the passing steel plates.

[0030] When the steel plate simultaneously covers the first detection section 31 and the second detection section 32, the controller synchronously reads the output signals of the two detection sections: The left side position L1 and right side position R1 of the steel plate at that location are obtained from the first detection unit 31; The left side position L2 and right side position R2 of the steel plate at this location are obtained from the second detection unit 32; At this moment, L1 and R1 correspond to the side positions of the cross-section of the steel plate passing through the first detection section at the current moment, and L2 and R2 correspond to the side positions of the cross-section of the steel plate passing through the second detection section at the same moment.

[0031] 2. Offset determination: The controller compares L1 with L2 and R1 with R2: If L1 = L2 and R1 = R2, it indicates that the steel plate is in a proper posture without rotational deviation.

[0032] If L1 > L2 and R1 > R2, it indicates that the front end of the steel plate deflects to the left.

[0033] If L1 < L2 and R1 < R2, it indicates that the front end of the steel plate deflects to the right.

[0034] The controller generates a deviation correction instruction according to the judgment result and sends it to the drive motor 44, causing the deviation correction roller to rotate to the side opposite to the deflection direction of the steel plate.

[0035] 3. Deviation correction execution: After receiving the instruction, the drive motor 44 drives the base 41 to rotate the deviation correction roller 42 by a small angle in the horizontal plane, so that the axis of the deviation correction roller forms a certain angle with the steel plate conveying direction. The deflection direction of the deviation correction roller is opposite to the deflection direction of the steel plate.

[0036] When the deviation correction roller deflects, a lateral frictional force will be generated when it contacts the steel plate. The direction of this frictional force is opposite to the deflection direction of the steel plate, thereby guiding the steel plate to gradually return to the correct position.

[0037] For example, when it is detected that the front end of the steel plate deflects to the left, the front end of the deviation correction roller deflects to the right, giving the steel plate a deviation correction force to the right, so that the steel plate gradually returns to the center line during the forward movement.

[0038] It should be noted that when using an array of photoelectric sensors to detect the edge position of the steel plate, the detection accuracy is affected by the arrangement density of the sensors. The distance between adjacent sensors determines the theoretical resolution of the position detection. For the ship steel plate pretreatment and correction device, this resolution can meet the actual production requirements. If higher detection accuracy is required, it can be achieved by reducing the distance between adjacent sensors.

[0039] Embodiment 2: On the basis of Embodiment 1, this embodiment further optimizes the deviation correction mechanism 4 and adds an auxiliary clamping function to improve the deviation correction effect on thick or deformed steel plates.

[0040] As Figure 3 shown, in addition to including the base 41, the deviation correction roller 42, the gear 43 and the drive motor 44, the deviation correction mechanism 4 in this embodiment further includes two oppositely arranged clamping components 45. These two clamping components 45 are respectively arranged on the lateral sides of the base 41 and are used to clamp the steel plate from both sides while the deviation correction roller 42 rotates for deviation correction, assisting the steel plate to be straightened.

[0041] The clamping assembly 45 includes two first connecting rods 451, the first ends of which are rotatably connected to the lateral sides of the base 41. The second ends of the two first connecting rods 451 are rotatably connected to the first end of a second connecting rod 452. A limiting housing 453 is fixedly installed on each lateral side of the frame of the conveying mechanism 1. The second ends of the two second connecting rods 452 pass through their respective limiting housings 453 and can only perform linear reciprocating motion along their axial direction (e.g., via linear bearings or grooves within the limiting housings 453).

[0042] A mounting platform 454 is fixedly installed on the second connecting rod 452. A multi-stage telescopic rod 455 is installed on the mounting platform 454, and a limiting clamping plate 456 is connected to the telescopic end of the multi-stage telescopic rod 455. Multiple flexible limiting wheels 457 are vertically arranged on the limiting clamping plate 456. These flexible limiting wheels 457 can rotate freely when in contact with the steel plate, which can both clamp and guide without scratching the surface of the steel plate.

[0043] The working principle of this embodiment is explained as follows: When the controller determines that the steel plate needs to be corrected, it sends a rotation command to the drive motor 44, and the correction roller 42 begins to deflect. The rotation of the base 41 pulls the first connecting rod 451 connected to it. The first connecting rod 451 acts as the driving rod, transmitting the rotational motion to the second connecting rod 452. Since the other end of the second connecting rod 452 is constrained by the limiting housing 453 and can only move in a straight line, the rotation of the base 41 is ultimately converted into the two second connecting rods 452 moving in opposite directions or away from each other in a straight line on the horizontal plane.

[0044] The movement of the second connecting rod 452 causes the mounting platform 454, multi-stage telescopic rod 455, limiting clamping plate 456, and flexible limiting wheel 457 on it to move together. When the two second connecting rods 452 move towards each other, the flexible limiting wheels 457 on both sides will gently clamp the steel plate from the left and right sides.

[0045] The multi-stage telescopic rod 455 can also be finely adjusted according to the width of the steel plate to adapt to plates of different widths. While clamping, the flexible limiting wheel 457 allows the steel plate to continue moving forward in the conveying direction. At this time, the lateral force generated by the tilt angle of the correcting roller 42, combined with the forced guidance of the flexible limiting wheels 457 on both sides, works together to allow the steel plate to be corrected to the correct position more quickly and accurately. After the correction is completed, the base 41 rotates back to its original position, driving the two second connecting rods 452 to move in opposite directions through the linkage mechanism, causing the clamping components 45 on both sides to release, awaiting the next correction action.

[0046] This linkage design cleverly utilizes the rotational power of the correction roller itself to synchronously drive the opening and closing of the clamping components through a purely mechanical structure. It requires no additional drive source or control program, has a compact structure, and is reliable in operation, making it particularly suitable for correction operations on continuous production lines.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0048] Although the invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0049] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0052] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A pretreatment and straightening device for ship steel plates, characterized in that: It includes a conveying mechanism (1) for carrying and conveying steel plates, and a flattening mechanism (2) for initially flattening the steel plates is provided above the conveying mechanism (1). An offset detection mechanism (3) is installed on the flattening mechanism (2). The offset detection mechanism (3) includes a first detection part (31) and a second detection part (32) arranged at intervals along the conveying direction. The first detection part (31) is used to detect the first side position of the steel plate on the incoming side, and the second detection part (32) is used to detect the second side position of the steel plate on the downstream side. The conveying mechanism (1) is provided with a correction mechanism (4), which is located downstream of the offset detection mechanism (3) and is used to correct the offset steel plate according to the first side position and the second side position.

2. The pretreatment and straightening device for ship steel plates according to claim 1, characterized in that: The flattening mechanism (2) includes a bracket (21) mounted above the conveying mechanism (1). A liftable base (22) is installed inside the bracket (21). The base (22) is connected to a drive component (23). The drive component (23) is used to drive the base (22) to rise and fall. At least one pressure roller (24) is rotatably mounted on the base (22). The pressure roller (24) is used to press against the surface of the steel plate after the base (22) descends. The offset detection mechanism (3) is mounted on the base (22) and rises and falls synchronously with the base (22).

3. The pretreatment and straightening device for ship steel plates according to claim 1, characterized in that: The first detection unit (31) includes a plurality of first detectors (311) arranged in an array along the width direction of the steel plate, and the second detection unit (32) includes a plurality of second detectors (321) arranged in an array along the width direction of the steel plate.

4. The pretreatment and straightening device for ship steel plates according to claim 3, characterized in that: The first detector (311) and the second detector (321) are both photoelectric sensors. Each photoelectric sensor independently detects whether there is a steel plate blocking its corresponding position and outputs a corresponding detection signal.

5. The pretreatment and straightening device for ship steel plates according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the first detection unit (31), the second detection unit (32) and the correction mechanism (4); the controller is used to receive the first side position detected by the first detection unit (31) and the second side position detected by the second detection unit (32), compare the first side position and the second side position, determine the offset direction of the steel plate according to the comparison result, and generate a control command according to the offset direction and send it to the correction mechanism (4).

6. The pretreatment and straightening device for ship steel plates according to claim 5, characterized in that: The correction mechanism (4) includes a base (41) on which a correction roller (42) for contacting and guiding the steel plate is rotatably mounted. The base (41) is connected to a drive motor (44) via two meshing gears (43). The drive motor (44) receives control commands to drive the base (41) to rotate the correction roller (42) in the horizontal plane.

7. The pretreatment and straightening device for ship steel plates according to claim 6, characterized in that: The correction mechanism (4) also includes two clamping components (45) arranged opposite to each other, respectively arranged on the lateral sides of the base (41), for moving towards each other to clamp the steel plate from both sides when the correction roller (42) rotates to correct the deviation, thus assisting in straightening the steel plate.

8. The pretreatment and straightening device for ship steel plates according to claim 6, characterized in that: The controller controls the rotation direction of the drive motor (44) according to the determined steel plate offset direction, so that the drive motor (44) drives the correction roller (42) to rotate to the side opposite to the steel plate offset direction.

9. A pretreatment and straightening device for ship steel plates according to claim 7, characterized in that: The clamping assembly (45) includes two first connecting rods (451). The first ends of the two first connecting rods (451) are rotatably connected to the two transverse sides of the base (41). The second ends of the two first connecting rods (451) are rotatably connected to the first end of a second connecting rod (452). Limiting housings (453) are fixedly provided on the transverse sides of the conveying mechanism (1). The second ends of the two second connecting rods (452) are slidably inserted into the corresponding limiting housings (453). An installation platform (454) is installed on each of the two second connecting rods (452). A multi-stage telescopic rod (455) is installed on the installation platform (454). The telescopic end of the multi-stage telescopic rod (455) is connected to a limiting clamping plate (456). Multiple flexible limiting wheels (457) are vertically arranged on the limiting clamping plate (456).

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