Ship bottom plate welding device

Abstract

The invention relates to the technical field of ship construction, and discloses a ship bottom plate welding device which comprises a lower rail laid along a ship bottom welding seam and a welding gun, the welding seam is positioned through the lower rail and a laser aligner, and the welding precision is guaranteed; the linear moving mechanism is meshed with the base and the gear to achieve stable movement of the welding gun, and the welding progress is adjusted by controlling a hand wheel. The height of the welding gun can be adjusted through the combination of the vertical cylinder, the lifting rod and the screw rod, and different welding height requirements are met; the friction locking mechanism and the double-threaded-rod structure ensure that the elevation angle of the welding gun is stable, and the welding quality is effectively improved; the welding gun is provided with a protection panel and a lighting mechanism, operation safety is guaranteed, the welding visual field is optimized, and the welding precision and efficiency of the ship bottom plate are improved through the device.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, in particular to a ship bottom plate welding device. Background Art

[0002] During the shipbuilding process, welding of the bottom plate is an important process to ensure the strength and sealing of the hull structure. Traditional bottom plate welding usually relies on manual operation, and is limited by the welding environment and the simplicity of welding tools. Problems such as inaccurate joints and uneven welds often occur during the welding process. This traditional welding method not only affects the welding quality, but also reduces production efficiency and increases the rework rate after welding. Since bottom welding needs to be performed on large workpieces, precision control becomes particularly important. Therefore, improving welding efficiency and welding quality has become a technical requirement in this field.

[0003] Although existing welding equipment helps to improve welding accuracy and efficiency, it is often unable to achieve precise control of welding angles, especially when there is a height difference between the bottom of the ship and the ground, it is difficult to adjust the position and angle of the welding gun to ensure the quality of the weld. In addition, the existing equipment lacks effective protection design, which can easily cause harm to operators during welding. At the same time, insufficient lighting in the welding environment may lead to misjudgment of the welding gap, thereby affecting the welding quality. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a ship bottom plate welding device, which solves the problems of the existing ship bottom plate welding device in terms of inaccurate welding angle control, inconvenient height adjustment, insufficient protective measures and insufficient lighting, and effectively improves the welding quality and efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A ship bottom plate welding device, comprising a lower track laid on the ground along the ship bottom weld and a welding gun, laser aligners are fixedly installed at both ends of the lower track, extension plates are arranged below both ends of the lower track, the extension plates are fixed to the ground through connecting pieces, the lower track has an I-shaped cross section, and a linear moving mechanism is installed on the lower track; The linear moving mechanism comprises a base sliding on the surface of the lower track, a vertical cylinder is vertically arranged on the top of the base, a lifting rod is vertically slidably installed on the top of the vertical cylinder, a head is arranged on the top of the lifting rod, a support plate is symmetrically arranged on the upper surface of the head, a fixing bolt is transversely arranged between the two support plates, the welding gun is placed on the top of the lifting rod, an A-shaped connecting plate is arranged at the bottom of the welding gun, and the A-shaped connecting plate is rotatably installed on the fixing bolt; A friction locking mechanism is also provided at the center of the upper surface of the head, and the friction locking mechanism is placed below the fixing bolt. A protective panel is vertically installed on the surface of the welding gun, and a lighting mechanism is also provided on one side of the head.

[0006] Furthermore, the upper surface of the lower track is evenly provided with teeth grooves, a gear is rotatably installed inside the base, the gear is placed above the tooth groove, and the gear and the tooth groove are meshed with each other, and a control handwheel is coaxially installed on the front side of the gear, and the control handwheel is placed on the outside of the base.

[0007] Furthermore, the front surface of the lifting rod is evenly provided with oblique teeth along the axis, and a notch groove is opened above the front surface of the vertical tube. Extension platforms are provided outwardly on the upper and lower sides of the outside of the notch groove. A spiral rod is vertically rotatably installed between the two extension platforms. The spiral rod cooperates with the oblique teeth, and a control end is also provided on the top of the spiral rod.

[0008] Furthermore, the friction locking mechanism includes a horizontally rotating double-threaded rod, the double-threaded rod is perpendicular to the axis of the fixing bolt, and moving blocks are symmetrically screwed on the surface of the double-threaded rod, and two of the moving blocks are screwed on different threaded surfaces respectively.

[0009] Furthermore, a connecting rod is hinged on the top of the moving block, and an extrusion arc plate is hinged on the top of the two connecting rods. The extrusion arc plate is placed directly below the fixing bolt, and the extrusion arc plate is in contact with the lower surface of the A-shaped connecting plate. A knob is also provided at the front end of the double-threaded rod.

[0010] Furthermore, an annular groove is provided on the surface of the head, and positioning holes are symmetrically provided on the inner surface of the annular groove, and two positioning holes are respectively disposed on two sides of the welding gun.

[0011] Furthermore, the lighting mechanism includes a mounting ring rotatably mounted on the surface of the annular groove, a swing plate is hinged on one side of the mounting ring, a searchlight is hinged on the end of the swing plate, and the searchlight is placed on the front side of the moving direction of the welding gun.

[0012] Furthermore, a boss is provided on the side of the mounting ring away from the swing plate, a positioning bolt is slidably installed inside the boss, an end of the positioning bolt close to the swing plate is provided as an arc structure, and the end of the positioning bolt is adapted to the inner size of the positioning hole.

[0013] Furthermore, a spring is arranged inside the boss, and one end of the spring is in contact with the end of the positioning bolt.

[0014] The present invention provides a ship bottom plate welding device having the following beneficial effects: The ship bottom plate welding device of the present invention has significant improvements in welding accuracy and welding efficiency. The combination of the lower track and the laser aligner realizes accurate positioning of the ship bottom plate joint seam, and the I-shaped cross-section structure of the lower track increases the stability of the device, so that the device can accurately slide along the preset path during the welding process, reducing the error caused by manual docking, ensuring the uniformity and consistency of the weld, and thus significantly improving the overall quality of the ship bottom plate welding; The linear movement mechanism of this device uses the sliding meshing design of the base and the gear to enable the welding gun to move smoothly along the straight line of the weld. By using the control hand wheel to adjust the sliding speed and position of the base, the operator can flexibly control the welding progress, especially in the weld position that requires precise docking, which can more effectively implement welding, effectively improve welding efficiency, reduce the difficulty of manual operation, and also reduce the possible rework rate after welding; In terms of height adjustment, the device achieves height adjustment of the welding gun through the cooperation of the vertical cylinder, lifting rod, oblique teeth and spiral rod. The operator adjusts the height of the lifting rod through the control end, so that the device can adapt to the height difference between the bottom of the ship and the ground, thereby ensuring that the welding gun is always at the optimal welding height, solving the defect of traditional welding equipment that is inconvenient to adjust under different height requirements; This device is specially designed with a friction locking mechanism, which adjusts the elevation angle through a double-threaded rod, achieving precise control and locking of the welding gun angle. The friction locking mechanism enables the welding gun to remain stable after the elevation angle is adjusted, and the double-threaded rod drives the extrusion arc plate to fix the elevation angle of the welding gun through the synchronous moving block and the connecting rod, further ensuring the consistency of the welding angle, thereby effectively avoiding the influence of angle deviation on welding quality; To ensure the safety of operators during welding, this device installs a protective panel on the surface of the welding gun, which effectively isolates the spatter that may be generated during welding. The panel can be adjusted along with the welding gun to adapt to welding work at different elevation angles. At the same time, through the design of the lighting mechanism, the gap before welding is fully illuminated to prevent the influence of foreign matter on the welding gap, thereby improving the welding quality. The lighting mechanism can be flexibly adjusted according to the welding direction, so that the operator's field of vision during welding is clearer, which helps to improve work efficiency and welding accuracy; In short, this device comprehensively improves the accuracy, stability and operational safety of ship bottom plate welding through optimization of track positioning, moving mechanism, angle and height adjustment, friction locking and safety protection, and meets the technical requirements of ship bottom plate welding in terms of high quality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the structural diagram of the installation stand of the present invention; Figure 2It is a schematic diagram of the explosion structure of the lifting rod and the mounting ring of the present invention; Figure 3 It is a schematic diagram of the side structure of the welding gun and the lifting rod of the present invention; Figure 4 It is a schematic diagram of the front installation structure of the welding gun and the lifting rod of the present invention; Figure 5 It is a schematic diagram of the lifting rod structure of the present invention; Figure 6 It is a schematic diagram of the mounting ring and searchlight mounting structure of the present invention; Figure 7 It is a schematic diagram of the internal structure of the lower track and the base of the present invention; Figure 8 For the present invention Figure 1 A schematic diagram of the enlarged structure of area A; Fig. 9 For the present invention Figure 5 Schematic diagram of the enlarged structure of area B.

[0016] Among them, 1. lower track; 11. extension plate; 12. laser aligner; 13. tooth groove; 2. linear moving mechanism; 21. base; 22. vertical cylinder; 23. control hand wheel; 24. gear; 25. notch groove; 26. extension platform; 27. screw rod; 28. control end; 3. lifting rod; 31. oblique teeth; 32. head; 33. annular groove; 34. positioning hole; 35. support plate; 36. fixing bolt; 37. friction locking mechanism; 371. double threaded rod; 372. moving block; 373. connecting rod; 374. extrusion arc plate; 4. welding gun; 41. A-shaped connecting plate; 5. protective panel; 6. lighting mechanism; 61. mounting ring; 62. boss; 63. positioning bolt; 64. spring; 65. swing plate; 66. searchlight. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Example 1

[0018] See also Figure 1-9 A ship bottom plate welding device comprises a lower track 1 laid on the ground along the weld of the ship bottom and a welding gun 4; laser aligners 12 are fixedly installed at both ends of the lower track 1, and the laser aligners 12 are used to ensure the accurate positioning of the weld. Extension plates 11 are arranged under both ends of the lower track 1, and the extension plates 11 are fixed to the ground through connecting pieces. The cross-section of the lower track 1 is I-shaped to enhance its structural stability and pressure resistance.

[0019] A linear moving mechanism 2 is installed on the lower track 1, and the linear moving mechanism 2 includes a base 21 sliding on the surface of the lower track 1, a vertical cylinder 22 is vertically arranged on the top of the base 21, a lifting rod 3 is vertically slidably installed on the top of the vertical cylinder 22, a head 32 is arranged on the top of the lifting rod 3, and a support plate 35 is symmetrically arranged on the upper surface of the head 32; a fixing bolt 36 is horizontally arranged between the two support plates 35 for installing a welding gun 4; the welding gun 4 is placed on the top of the lifting rod 3; an A-shaped connecting plate 41 is arranged at the bottom of the welding gun 4, and the A-shaped connecting plate 41 is rotatably installed on the fixing bolt 36 to realize flexible angle adjustment of the welding gun.

[0020] A friction locking mechanism 37 is also provided at the center of the upper surface of the head 32, and the friction locking mechanism 37 is placed below the fixing bolt 36. The stability of the angle of the welding gun is achieved through the locking mechanism; a protective panel 5 is vertically installed on the surface of the welding gun 4 to effectively protect the operator; a lighting mechanism 6 is also provided on one side of the head 32 to provide sufficient light during welding and improve the welding quality.

[0021] See also Figure 1 , Figure 7 and Figure 8 The upper surface of the lower track 1 is evenly provided with tooth grooves 13; the tooth grooves 13 mesh with the gears 24 of the base 21 so as to achieve smooth linear sliding during the welding process; a gear 24 is rotatably installed inside the base 21, the gear 24 is placed above the tooth grooves 13, and the gear 24 meshes with the tooth grooves 13 to ensure the smoothness and accuracy of the linear movement; a control handwheel 23 is coaxially installed on the front side of the gear 24; the control handwheel 23 is placed on the outside of the base 21, and the gear is controlled by rotating the handwheel to adjust the sliding speed and position of the base 21 along the lower track 1, thereby ensuring accurate control of the welding process.

[0022] The control hand wheel 23 can also be replaced by a servo reduction motor to drive the device to move slowly by itself, and the moving speed and distance are always controlled by the staff.

[0023] See also Figure 3 and Figure 8The front side surface of the lifting rod 3 is evenly provided with oblique teeth 31 along the axis, and the oblique teeth 31 are meshed with the spiral rod 27 to achieve the height adjustment of the lifting rod; a notch groove 25 is opened above the front side surface of the vertical cylinder 22, and extension platforms 26 are arranged outward on the upper and lower outer sides of the notch groove 25; a spiral rod 27 is vertically rotatably installed between the two extension platforms 26; the spiral rod 27 cooperates with the oblique teeth 31, and the lifting rod 3 is driven up and down by the rotation of the spiral rod 27; a control end 28 is also provided on the top of the spiral rod 27, and the height of the lifting rod 3 is adjusted by the control end 28 to meet different welding height requirements. The cooperation between the spiral rod 27 and the oblique teeth 31 can make it possible to drive the oblique teeth 31 to rotate only by the spiral rod 27 during adjustment, and cannot rotate in the opposite direction, so as to achieve the purpose of self-locking.

[0024] In this real-time example, a laser rangefinder can be added to one side of the lifting rod 3, and the control end 28 uses a servo motor to control the height of the lifting rod 3. The laser rangefinder can monitor the distance between it and the bottom plate of the ship in real time, and adjust the height through the servo motor, so that the top welding gun 4 is automatically adjusted with the height of the bottom plate of the ship to ensure that the distance between the two is consistent.

[0025] See also Fig. 9 The friction locking mechanism 37 includes a horizontally rotating double-threaded rod 371, which is perpendicular to the axis of the fixing bolt 36; the surface of the double-threaded rod 371 is symmetrically screwed with moving blocks 372; the two moving blocks 372 are respectively screwed on different thread surfaces to ensure that the moving blocks 372 can move synchronously in opposite directions; the design of the double-threaded rod 371 realizes precise control and locking of the elevation angle of the welding gun 4.

[0026] See also Fig. 9 The top of the moving block 372 is hinged with a connecting rod 373, and the top of the connecting rod 373 is hinged with an extrusion arc plate 374; the extrusion arc plate 374 is placed just below the fixing bolt 36, and the extrusion arc plate 374 contacts the lower surface of the A-shaped connecting plate 41; through the rotation of the double-threaded rod 371, the extrusion arc plate 374 can be driven to adjust its height to control the extrusion force. The staff can adjust the extrusion force on the A-shaped connecting plate 41 by using a straw to control the angle of the welding gun 4. When the extrusion force of the two is too large, it will make the angle adjustment difficult. On the contrary, if the extrusion is too small, the angle of the welding gun 4 cannot be fixed. The most suitable extrusion force can ensure that the welding gun 4 maintains an elevation angle when not subjected to external force through the friction between the two. When subjected to external force applied by the staff, the elevation angle may change, so that the angle of the welding gun 4 remains stable and the welding angle is ensured to be consistent; a knob is also provided at the front end of the double-threaded rod 371, which is convenient for the operator to make fine adjustments as needed.

[0027] See also Fig. 9An annular groove 33 is provided on the surface of the head 32, and positioning holes 34 are symmetrically provided on the inner surface of the annular groove 33; the two positioning holes 34 are respectively arranged on both sides of the welding gun 4, that is, the two positioning holes 34 are distributed along the direction of the lower track 1, and the positioning holes 34 are used to fix the positioning bolts 63 of the mounting ring 61 during the welding process to ensure the stability of the lighting mechanism 6.

[0028] See also Figure 3-6 The lighting mechanism 6 includes a mounting ring 61 rotatably mounted on the surface of the annular groove 33; a swing plate 65 is hinged on one side of the mounting ring 61, and a searchlight 66 is hinged on the end of the swing plate 65; the searchlight 66 is placed on the front side of the moving direction of the welding gun 4, and by adjusting the angles of the swing plate 65 and the searchlight 66, the weld can be accurately illuminated during welding; and locking pieces are provided at the hinges of the two to ensure the fixation after the angle is adjusted. This design can improve the welding quality and prevent foreign matter at the weld from affecting the welding effect.

[0029] See also Figure 5-6 A boss 62 is provided on the side of the mounting ring 61 away from the swing plate 65; a positioning bolt 63 is slidably installed inside the boss 62; the end of the positioning bolt 63 close to the swing plate 65 is set as an arc structure; the end of the positioning bolt 63 is adapted to the internal size of the positioning hole 34; the structural design of the boss 62 ensures that the positioning bolt 63 can accurately enter the positioning hole 34 during the adjustment process, thereby fixing the position of the lighting mechanism 6, so that the mounting ring 61 can rotate 180 degrees and automatically get limited.

[0030] See also Figure 6 A spring 64 is arranged inside the boss 62; one end of the spring 64 contacts the end of the positioning bolt 63; the design of the spring 64 realizes the automatic resetting function of the positioning bolt 63; during the welding process, if the position of the lighting mechanism 6 needs to be adjusted, the operator can forcefully rotate the mounting ring 6 to form a shear force on the positioning bolt 63 of the arc-shaped head to shrink the positioning bolt 63, and then adjust the angle of the mounting ring 6 to ensure the accuracy of the lighting position, while improving the convenience of operation.

[0031] When the lighting direction needs to be adjusted, the swing plate 65 can be rotated downward to be in a vertical state to reduce the space required for rotation. Example 2

[0032] See also Figure 1-9This embodiment provides an improved ship bottom plate welding device, which mainly focuses on improving welding accuracy and efficiency. The welding device includes a lower track 1 laid along the ship bottom weld and a welding gun 4, wherein a laser aligner 12 of model YX-500 is used to ensure the accurate positioning of the weld. In order to verify the improvement of the accuracy and efficiency of the welding device during the welding process, 5 groups of comparative experiments were carried out, each group of experiments was carried out under the same welding conditions, and the error of the welding gap, welding speed and rework rate were recorded.

[0033] Welding accuracy measurement: A three-dimensional laser scanning device (model 3D-LS2000) is used to measure the geometric accuracy of the weld. The error of the welding gap is controlled within 0.5mm, which is a significant improvement over the 1.5mm accuracy of traditional manual welding.

[0034] Welding speed: The sliding speed of the base 21 is adjusted by using the frequency conversion control hand wheel 23. In the five groups of experiments, the average welding speed reached 12m / h, which is 35% faster than that of the traditional welding equipment.

[0035] Repair rate: Through X-ray inspection (using model XRD-800) on the welding parts of 5 groups of experiments, it was found that the repair rate was reduced from the traditional 15% to 5%. Example 3

[0036] See also Figure 3-8 , this embodiment focuses on the height adjustment function of the welding gun. The device includes a vertical cylinder 22, a lifting rod 3 and a spiral rod 27. This embodiment uses a vertical cylinder of model HT-1200 and a spiral rod made of high-temperature resistant material to ensure that the lifting rod can operate stably during the welding process. The material of the spiral rod is high-strength alloy steel with an elastic modulus of 200 GPa to adapt to the high temperature and high pressure environment of the welding site.

[0037] In order to verify the adaptability and stability of the welding gun at different heights, five groups of experiments were carried out at different heights, namely 1.0m, 1.5m, 2.0m, 2.5m and 3.0m, and the response time of the lifting rod, welding accuracy and stability during welding were recorded.

[0038] Response time: The height of the lifting rod 3 is adjusted by the control terminal 28. In each group of experiments, the average response time of the lifting rod is 2.5 seconds, which is significantly better than the 4-second response time of the traditional device.

[0039] Welding accuracy: At different heights, the straightness of the weld was measured using a laser rangefinder (model LDM-150). The results showed that the welding accuracy was maintained within 0.6 mm.

[0040] Stability: During the welding process, the vibration frequency of the vertical tube was recorded (using the VMS-500 vibration sensor). The results showed that the vibration frequency was less than 2Hz, ensuring the stability of the welding. Example 4

[0041] See also Fig. 9 This embodiment focuses on the function of the friction locking mechanism 37 and its control of the elevation angle of the welding gun. In this embodiment, a double threaded rod 371 is used to adjust the elevation angle of the welding gun. The threaded rod is made of S45C carbon steel and is subjected to high-frequency quenching treatment to improve its wear resistance and strength. By repeatedly adjusting the angle of the welding gun, precise control of the welding angle is achieved.

[0042] Five groups of welding experiments were conducted at different elevation angles, which were set to 15°, 20°, 25°, 30° and 35° respectively, to measure the welding gun's ability to maintain elevation angle, weld consistency and stability after locking.

[0043] Elevation angle holding capability: The elevation angle is adjusted by rotating the double threaded rod 371. In each set of experiments, the angle deviation of the welding gun is controlled within 0.3°.

[0044] Weld consistency: An ultrasonic weld detector (model UT-3000) was used to test weld consistency. The results showed that the width deviation of the weld was within 0.4 mm.

[0045] Stability test: Use a torque wrench to test the locking force of the friction locking mechanism. The average locking force is 50Nm to ensure the stability of the welding gun during the welding process. Example 5

[0046] See also Figure 3-6 This embodiment focuses on the optimized design of the lighting mechanism 6. The mounting ring 61 and the swing plate 65 are made of high-strength aluminum alloy material, which is light and corrosion-resistant. The searchlight 66 uses a high-brightness LED bulb of model LED-750, with a brightness of up to 1200 lumens to ensure that the welding gap is clearly visible.

[0047] Five groups of welding experiments were conducted under different ambient light intensities, namely 100 lux, 200 lux, 300 lux, 400 lux and 500 lux, to test the effect of searchlight on welds.

[0048] Welding accuracy: Under different light intensity conditions, the welds were tested using a weld quality tester (model WQM-400). The results showed that with the assistance of a searchlight, the weld accuracy was maintained within 0.7mm, regardless of changes in the external ambient light intensity.

[0049] Convenience of operation: By recording the time it takes the operator to adjust the searchlight, the average adjustment time in each group of experiments was 1.2 seconds, which significantly shortened the welding preparation time.

[0050] Illumination range: The illumination range of the test searchlight at different angles was found to cover an average area of ​​1.5 square meters, ensuring adequate illumination of the welding area. Example 6

[0051] See also Figure 5-6 This embodiment focuses on the overall safety protection performance of the welding device. The protective panel 5 is made of high temperature resistant composite material, which can effectively prevent the spatter generated during welding from causing harm to the operator. The panel thickness is 5mm, which meets the ISO 25980 welding protection standard.

[0052] Five groups of protection test experiments were conducted, each group of experiments simulating the impact of spatter under different welding conditions and recording the impact resistance of the protection panel and the safety of the operator.

[0053] Impact resistance: The protective panel was tested using an impact tester (model CIT-1000). The results showed that the panel had no cracks or damage in 5 impact tests, indicating that it has good protective performance.

[0054] Operator safety: The temperature behind the protective panel is measured by an infrared thermometer (model IRT-600), and the average temperature is 45°C, which is far below the safety standard of 60°C, ensuring the safety of operators.

[0055] Working principle: First, after the bottom of the ship is hoisted and docked, the lower track 1 is laid along the bottom of the joint, and then the laser aligners 12 at both ends are used to align with the joint and keep them fixed. The base 21 is installed on the surface of the lower track 1 through one end, and the gear 24 is driven to rotate by rotating the external control hand wheel 23, and then the base 21 is driven to slide along the surface of the lower track 1 through the engagement of the gear 24 with the tooth groove 13. The height of the lifting rod 3 is adjusted according to the height between the bottom of the ship and the ground. At this time, the spiral rod 27 can be driven to rotate through the control end 28, and then the lifting rod 3 is driven to adjust the height through the cooperation of the spiral rod 27 and the oblique teeth 31, and reverse self-locking can be achieved. After the height adjustment is completed, the elevation angle of the welding gun 4 is controlled to make the welding gun 4 correspond to the weld, and then the welding work along the straight line can be achieved, and the welding angle can be controlled by adjusting the angle of the welding gun 4. The protective panel 5 fixed on the surface of the welding gun 4 can effectively protect the staff.

[0056] After the elevation angle of the welding gun 4 is adjusted, the double-threaded rod 371 can be rotated to drive the two moving blocks 372 to move synchronously in the opposite direction, and then the extrusion arc plate 374 can be driven to adjust its height through the connecting rod 373 to control its extrusion force on the A-shaped connecting plate 41, so that the elevation angle of the welding gun 4 remains fixed and the welding angle can be adjusted at any time on the front side.

[0057] During the straight line welding process, the lighting mechanism 6 is rotated so that the swing plate 65 is placed on the front side of the moving welding, and by adjusting the angles of the swing plate 65 and the searchlight 66, the gap before welding can be illuminated, which is convenient for the staff to observe the gap and prevent foreign matter from affecting the welding quality. At the same time, the swing plate 65 can be rotated 180° to adapt to the different moving directions of the linear moving mechanism 2. When adjusting, the rotating mounting ring 61 can be kept fixed by the positioning bolt 63 and the positioning hole 34.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship bottom plate welding device, characterized in that: It comprises a lower track (1) and a welding gun (4) laid on the ground along the weld of the bottom of a ship, laser aligners (12) are fixedly installed at both ends of the lower track (1), extension plates (11) are arranged below both ends of the lower track (1), and the extension plates (11) are fixed to the ground via connecting parts, the cross section of the lower track (1) is I-shaped, and the lower track (1) is installed with a linear moving mechanism (2); The linear motion mechanism (2) comprises a base (21) sliding on the surface of the lower track (1), a vertical cylinder (22) being vertically arranged on the top of the base (21), a lifting rod (3) being vertically slidably mounted on the top of the vertical cylinder (22), a head (32) being arranged on the top of the lifting rod (3), a support plate (35) being symmetrically arranged on the upper surface of the head (32), a fixing bolt (36) being transversely arranged between two of the support plates (35), the welding gun (4) being placed on the top of the lifting rod (3), an A-shaped connecting plate (41) being arranged on the bottom of the welding gun (4), and the A-shaped connecting plate (41) being rotatably mounted on the fixing bolt (36); A friction locking mechanism (37) is also provided at the center of the upper surface of the head (32), and the friction locking mechanism (37) is placed below the fixing bolt (36). A protective panel (5) is vertically mounted on the surface of the welding gun (4), and a lighting mechanism (6) is also provided on one side of the head (32).

2. A ship bottom plate welding device according to claim 1, characterized in that: The upper surface of the lower track (1) is evenly provided with tooth grooves (13); a gear (24) is rotatably mounted inside the base (21); the gear (24) is placed above the tooth groove (13), and the gear (24) and the tooth groove (13) are meshed with each other; a control hand wheel (23) is coaxially mounted on the front side of the gear (24); the control hand wheel (23) is placed outside the base (21).

3. A ship bottom plate welding device according to claim 1, characterized in that: The front surface of the lifting rod (3) is evenly provided with oblique teeth (31) along the axis, and a notch groove (25) is opened above the front surface of the vertical tube (22). Extension platforms (26) are provided outwardly on the upper and lower sides of the outer sides of the notch groove (25). A spiral rod (27) is vertically rotatably installed between the two extension platforms (26). The spiral rod (27) cooperates with the oblique teeth (31), and a control end (28) is also provided at the top of the spiral rod (27).

4. A ship bottom plate welding device according to claim 1, characterized in that: The friction locking mechanism (37) comprises a horizontally rotating double-threaded rod (371), the double-threaded rod (371) being perpendicular to the axis of the fixing bolt (36), and moving blocks (372) being symmetrically screwed on the surface of the double-threaded rod (371), and the two moving blocks (372) being screwed on different threaded surfaces respectively.

5. A ship bottom plate welding device according to claim 4, characterized in that: The top of the moving block (372) is hinged with a connecting rod (373), and the tops of the two connecting rods (373) are hinged with extrusion arc plates (374). The extrusion arc plates (374) are placed directly below the fixing bolts (36), and the extrusion arc plates (374) are in contact with the lower surface of the A-shaped connecting plate (41). A knob is also provided at the front end of the double-threaded rod (371).

6. A ship bottom plate welding device according to claim 1, characterized in that: An annular groove (33) is provided on the surface of the head (32), and positioning holes (34) are symmetrically provided on the inner surface of the annular groove (33), wherein the two positioning holes (34) are respectively disposed on two sides of the welding gun (4).

7. A ship bottom plate welding device according to claim 6, characterized in that: The lighting mechanism (6) comprises a mounting ring (61) rotatably mounted on the surface of the annular groove (33), a swing plate (65) being hingedly connected to one side of the mounting ring (61), a searchlight (66) being hingedly connected to the end of the swing plate (65), and the searchlight (66) being placed on the front side of the moving direction of the welding gun (4).

8. A ship bottom plate welding device according to claim 7, characterized in that: A boss (62) is provided on the side of the mounting ring (61) facing away from the swing plate (65), a positioning bolt (63) is slidably mounted inside the boss (62), an end of the positioning bolt (63) close to the swing plate (65) is arranged in an arc-shaped structure, and an end of the positioning bolt (63) is adapted to the internal dimensions of the positioning hole (34).

9. A ship bottom plate welding device according to claim 8, characterized in that: A spring (64) is arranged inside the boss (62), and one end of the spring (64) is in contact with the end of the positioning bolt (63).

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