A device for detecting the flatness of aluminum alloy ship hull welding

Abstract

This utility model discloses a welding flatness detection device for aluminum alloy ship hulls, including a support frame, a guide rail mounted on the support frame, a movable guide rail mounted on the guide rail, and a slide block mounted on the movable guide rail. An ultrasonic detector is fixed to the bottom of the slide block via a connecting mechanism. The connecting mechanism includes a motor, with a mounting plate mounted on the bottom of the motor output shaft via an adjusting mechanism. The ultrasonic detector is fixed below the mounting plate. The adjusting mechanism includes a second connecting frame, with downward-facing telescopic cylinders fixed on both sides of the second connecting frame. The bottom of the telescopic cylinders is connected to the top surface of the mounting plate via a movable joint. The ultrasonic detector performs omnidirectional detection by moving the slide block on the movable guide rail and the movable guide rail moving along the guide rail. Different degrees of extension and retraction of the telescopic cylinders on both sides allow for different heights of the mounting plate and the ultrasonic detector. Combined with the rotation adjustment of the motor, the tilt accuracy of the ultrasonic detector is controlled, achieving omnidirectional detection.

Description

Technical Field

[0001] This utility model belongs to the field of ship hull flatness detection technology, specifically relating to a device for detecting the welding flatness of aluminum alloy ship hulls. Background Technology

[0002] With the rapid development of industrial technology, aluminum alloy materials have emerged in the market. Due to their low density, high strength, and good plasticity, aluminum alloys can be processed into various profiles, making them widely used in the shipbuilding industry. This is mainly due to their low specific gravity and strong corrosion resistance. During ship navigation, they can increase ship speed, and their low density effectively reduces ship weight, ensuring stability. For the shipbuilding industry, they are considered a material with high utilization value.

[0003] The welding process is a critical aspect of building aluminum alloy hulls, and it remains the biggest obstacle to successful aluminum alloy ship construction. Compared to steel, aluminum alloys are more prone to deformation during welding, making fully welded aluminum alloy ships significantly more difficult to build than those constructed from other materials.

[0004] Therefore, weld flatness needs to be checked after welding. Currently, weld flatness is generally checked by using a ruler. The ruler is placed parallel to the weld and checked section by section starting from one end. If there is a gap or poor overlap between the ruler and the weld, it indicates that there is a flatness problem with the weld. The ruler test is inefficient and has poor accuracy. Utility Model Content

[0005] This utility model provides a welding flatness detection device for aluminum alloy ship hulls. The device uses a sliding block that moves on a movable guide rail, which allows for omnidirectional detection by an ultrasonic detector. Different degrees of extension and retraction of the two telescopic cylinders on both sides allow for different heights of the mounting plate and the ultrasonic detector. Combined with the rotation adjustment of the motor, the tilt accuracy of the ultrasonic detector is controlled, achieving omnidirectional detection and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding flatness detection device for aluminum alloy ship hulls, comprising a support frame, a guide rail running forward and backward on the support frame, a movable guide rail perpendicular to the guide rail on the guide rail, the movable guide rail being movable along the guide rail by a traveling mechanism; a slide block is mounted on the movable guide rail, the slide block being movable along the guide rail by the traveling mechanism, and an ultrasonic detector is fixed at the bottom end of the slide block by a connecting mechanism, the ultrasonic detector having its detection head facing downward.

[0007] Preferably, the connecting mechanism includes a first connecting frame, on which a motor is fixedly mounted. The bottom end of the motor output shaft is fitted with a mounting plate via an adjustment mechanism, and the ultrasonic detector is fixed below the mounting plate.

[0008] Preferably, the adjustment mechanism includes a second connecting frame, on both sides of which are fixed downward telescopic cylinders, and the bottom end of the telescopic cylinder is connected to the top surface of the mounting plate through a movable joint.

[0009] Preferably, the movable joint includes a first mounting base, the first mounting base having a ball cavity inside, the top of the ball cavity being narrowed, that is, the diameter of the top opening being smaller than the inner diameter of the ball cavity, the ball cavity containing a first ball, the top of the first ball having a connecting rod at its top end, the top end of the connecting rod being hinged to the bottom end of the telescopic cylinder piston rod.

[0010] Preferably, the bottom of the first mounting base is provided with a mounting edge and a mounting hole, and the mounting plate is fixedly connected by fixing screws.

[0011] Preferably, the bottom center of the second connecting frame is provided with a telescopic cylinder, the inner wall of the telescopic cylinder is provided with a telescopic cavity, the top surface of the mounting plate is fixed with a limiting plate, the limiting plate and the center of the mounting plate form a ball groove, and a second ball is installed thereon, the top of the limiting plate is open, and the second ball is fixed with a shaft that extends into the telescopic cylinder.

[0012] Preferably, the limiting plate is fixed to the top surface of the mounting plate by fastening screws.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The ultrasonic detector can perform omnidirectional detection by moving the slide block on the movable guide rail, and the movable guide rail moves along the guide rail.

[0014] 2. By extending and retracting the telescopic cylinders on both sides to different degrees, the mounting plate and the ultrasonic detector can be adjusted to different heights. Combined with the rotation adjustment of the motor, the tilt accuracy of the ultrasonic detector can be controlled to achieve all-round detection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front sectional view of the present invention; Figure 2 This is a top view of the two parts of the outer mold of this utility model; Figure 3 This is a partial structural diagram of the annular flow divider of this utility model.

[0016] In the diagram: 1. Support frame; 2. Guide rail; 3. Moving guide rail; 4. Slide; 5. Ultrasonic detector; 6. First connecting frame; 7. Motor; 8. Mounting plate; 9. Second connecting frame; 10. Telescopic cylinder; 11. First mounting base; 12. First sphere; 13. Connecting rod; 14. Telescopic cylinder; 15. Limiting plate; 16. Second sphere; 17. Shaft. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a welding flatness detection device for aluminum alloy ship hulls, including a support frame 1. The support frame 1 is equipped with a guide rail 2 running forward and backward. The guide rail 2 is equipped with a movable guide rail 3 perpendicular to its direction. The movable guide rail 3 can move along the guide rail 2 via a walking mechanism. A slide 4 is mounted on the movable guide rail 3. The slide 4 moves along the slide via the walking mechanism. An ultrasonic detector 5 is fixed to the bottom end of the slide 4 via a connecting mechanism. The ultrasonic detector 5 is set with its detection head facing downward. In use, the support frame 1 is installed according to the site conditions. Similarly, the guide rail 2 and the movable guide rail 3 are installed. The guide rail 2 and the movable guide rail 3 can be conventional walking servo guide rails. The ultrasonic detector 5 can perform omnidirectional detection by moving the slide 4 on the movable guide rail 3 and the movable guide rail 3 moving along the guide rail 2.

[0019] Specifically, the connecting mechanism includes a first connecting frame 6, on which a motor 7 is fixedly mounted. The bottom end of the output shaft of the motor 7 is fitted with a mounting plate 8 via an adjustment mechanism. The ultrasonic detector 5 is fixed below the mounting plate 8. In this embodiment, since the welding conditions may vary in different parts of the hull, the motor 7 drives the second connecting frame 9 to rotate, which in turn drives the mounting plate 8 to rotate, thereby causing the ultrasonic detector 5 to rotate by an angle.

[0020] Specifically, the adjustment mechanism includes a second connecting frame 9, with downward-facing telescopic cylinders 10 fixed on both sides of the second connecting frame 9. The bottom end of the telescopic cylinder 10 is connected to the top surface of the mounting plate 8 through a movable joint. In this embodiment, when the telescopic rods 10 on both sides drive the mounting plate 8 to rise and fall, the movable joint compensates for lateral displacement.

[0021] Specifically, the movable joint includes a first mounting base 11, the first mounting base 11 having a ball cavity inside, the top of the ball cavity being narrowed, that is, the diameter of the top opening is smaller than the inner diameter of the ball cavity, the ball cavity containing a first ball 12, the top of the first ball 12 having a connecting rod 13, the top of the connecting rod 13 being hinged to the bottom end of the piston rod of the telescopic cylinder 10; in this embodiment, when the telescopic rods 10 on both sides drive the mounting plate 8 to move up and down, lateral displacement will occur, and through the lateral movable hinge of the connecting rod 13 to the piston rod of the telescopic cylinder 10, and the hinge of the first ball 12, the corresponding movement can be made to compensate for the lateral displacement.

[0022] Specifically, the first mounting base 11 has a mounting edge and a mounting hole at its bottom, and is fixedly connected to the mounting plate 8 by fixing screws; in this embodiment, the first mounting base 11 is conveniently installed and removed from the mounting plate 8.

[0023] Specifically, the bottom center of the second connecting frame 9 is provided with a telescopic cylinder 14, the inner wall of the telescopic cylinder 14 is provided with a telescopic cavity, the top surface of the mounting plate 8 is fixed with a limiting plate 15, the limiting plate 15 and the center of the mounting plate 8 form a ball groove, and a second ball 16 is installed thereon. The top of the limiting plate 15 is open, and the second ball 16 is fixed with a shaft 17 that extends into the telescopic cylinder 14. In this embodiment, when the mounting plate 8 tilts at an angle, the second ball 16 rotates so that the shaft 17 can still remain vertical, and the shaft 17 and the telescopic cylinder 14 can extend and retract without interference.

[0024] Specifically, the limiting plate 15 is fixed to the top surface of the mounting plate 8 by fastening screws; in this embodiment, the limiting plate 15 can be easily installed and removed.

[0025] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0026] Working principle: During use, the support frame 1 is installed according to the site conditions, and the guide rail 2 and moving guide rail 3 are also installed. Conventional servo guide rails can be used for guide rail 2 and moving guide rail 3. The slide 4 moves on the moving guide rail 3, and the moving guide rail 3 moves along the guide rail 2 to achieve omnidirectional detection by the ultrasonic detector 5. Simultaneously, due to the different welding conditions in different parts of the hull (e.g., when welding two plates on the same plane, the weld seam is at a flat gap, while when welding two perpendicular plates, the weld seam is at an angle), the ultrasonic detector 5 needs to present different angles for detection. At this time, the motor 7 drives... The rotation of the second connecting frame 9 can drive the mounting plate 8 to rotate, which in turn drives the ultrasonic detector 5 to rotate by an angle. At the same time, the extension cylinders 10 on both sides drive the piston rod to extend and retract to different degrees, so as to achieve different heights of the mounting plate 8 and the ultrasonic detector 5 on both sides, and to control the tilt, so as to realize the detection of the bevel weld. The ultrasonic detector 5 generates high-frequency ultrasonic waves, which are transmitted into the welded workpiece through the probe. When the ultrasonic waves encounter defects in the weld, they will generate reflected waves. The ultrasonic detector 5 receives these reflected waves and analyzes them. Based on the time, amplitude and other characteristics of the reflected waves, it judges the flatness of the defects in the weld.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the flatness of aluminum alloy ship hull welding, comprising a support frame (1), characterized in that, The support frame (1) is equipped with a front-to-back guide rail (2), and the guide rail (2) is equipped with a moving guide rail (3) perpendicular to its direction. The moving guide rail (3) can move along the guide rail (2) through a walking mechanism. The moving guide rail (3) is equipped with a slide (4), and the slide (4) moves along it through a walking mechanism. The bottom end of the slide (4) is fixed with an ultrasonic detector (5) through a connecting mechanism. The ultrasonic detector (5) is set with its detection head facing downward.

2. The aluminum alloy hull welding flatness detection device according to claim 1, characterized in that, The connecting mechanism includes a first connecting frame (6), on which a motor (7) is fixedly installed. The bottom end of the output shaft of the motor (7) is fitted with a mounting plate (8) through an adjustment mechanism. The ultrasonic detector (5) is fixed below the mounting plate (8).

3. The aluminum alloy hull welding flatness detection device according to claim 2, characterized in that, The adjustment mechanism includes a second connecting frame (9), and both sides of the second connecting frame (9) are fixed with downward telescopic cylinders (10). The bottom end of the telescopic cylinder (10) is connected to the top surface of the mounting plate (8) through a movable joint.

4. The aluminum alloy hull welding flatness detection device according to claim 3, characterized in that, The movable joint includes a first mounting base (11), the first mounting base (11) has a ball cavity inside, the top of the ball cavity is narrowed, that is, the diameter of the top opening is smaller than the inner diameter of the ball cavity, the ball cavity contains a first ball (12), the top of the first ball (12) is provided with a connecting rod (13), the top of the connecting rod (13) is hinged to the bottom end of the piston rod of the telescopic cylinder (10).

5. The aluminum alloy hull welding flatness detection device according to claim 4, characterized in that, The first mounting base (11) has a mounting edge at the bottom and a mounting hole, and is fixedly connected to the mounting plate (8) by fixing screws.

6. The aluminum alloy hull welding flatness detection device according to claim 3, characterized in that, The bottom center of the second connecting frame (9) is provided with a telescopic cylinder (14), the inner wall of the telescopic cylinder (14) is provided with a telescopic cavity, the top surface of the mounting plate (8) is fixed with a limiting plate (15), the limiting plate (15) and the center of the mounting plate (8) form a ball groove, and a second ball (16) is installed thereon. The top of the limiting plate (15) is open, and the second ball (16) is fixed with a shaft (17) that extends into the telescopic cylinder (14).

7. The aluminum alloy hull welding flatness detection device according to claim 6, characterized in that, The limiting plate (15) is fixed to the top surface of the mounting plate (8) by fastening screws.

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