A method for connecting ship bow round steel and outer plate

Abstract

The present invention discloses a method for connecting a bow column round steel and an outer plate of a ship. The method includes cutting a connection portion between the bow round steel and a first outer plate to obtain an overlap surface, then overlapping and connecting the first outer plate and the bow round steel, then beveling the lower end of the bow round steel, and welding and fixing the connection between the bow round steel and the first outer plate. The present invention increases the connection area between the first outer plate and the bow round steel by changing the connection between the first outer plate and the bow round steel from butt joint to overlap connection, reduces stress concentration between the first outer plate and the bow round steel, is conducive to the conduction and release of stress, improves the connection strength, and improves the shipbuilding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of ship construction, and in particular relates to a method for connecting a bow column round steel and an outer plate of a ship. Background Art

[0002] During the voyage, the bow of a ship is subject to a greater impact from the water flow. The bow of a ship is located at the front end of the ship and bears the maximum water pressure, wave impact and external collision force of the ship. Therefore, the bow of the ship needs to have sufficient rigidity and strength. On the other hand, for some ships that have speed requirements, in order to ensure good speed, the bow of the ship generally adopts a smaller angle outer plate structure, which is conducive to reducing the resistance of the ship. In order to ensure that the bow of the ship can obtain sufficient structural strength and the smooth transition of the outer plates on both sides of the bow, round steel is generally used for part of the bow structure.

[0003] Conventional round steel and outer plate are connected by butt joint, that is, the end of the round steel is directly against the edge of the outer plate, and then the two sides are beveled for welding. Alternatively, a notch corresponding to the round steel is opened on the outer plate, and the round steel is extended at the same time, so that the round steel is smoothly embedded in the outer plate, and then butt welding is performed. These two connection methods are relatively simple and direct, but they have high requirements on the force and construction quality of the ship, and are not conducive to the aesthetic appearance of the ship. Since the round steel and the outer plate are directly butt jointed, it is easy to produce stress concentration points at the connection due to the special shape of the round steel. At this time, if the welding quality is flawed or the external force is too large, it is very easy to cause defects such as cracks, which is easy to cause safety accidents. On the other hand, the direct butt joint of the round steel and the outer plate will make the transition of the ship's appearance not smooth enough, which seriously affects the beauty of the ship. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a method for connecting a bow column round steel and an outer plate of a ship. The method of the present invention increases the connection area of ​​the first outer plate and the bow round steel by changing the butt connection between the first outer plate and the bow round steel to an overlap connection, reduces the stress between the first outer plate and the bow round steel, improves the connection strength, and improves the shipbuilding quality.

[0005] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0006] A method for connecting a bow column round steel and an outer plate of a ship, wherein a bow column is arranged in a bow area of ​​the ship, the bow column comprises a bow column round steel, the bow column round steel is connected to a hull butt outer plate, the butt outer plate comprises a first outer plate, a second outer plate and a third outer plate, the side surface of the first outer plate is respectively connected to the side surfaces of the second outer plate and the third outer plate, the first outer plate is connected to the front of the bow round steel, the second outer plate and the third outer plate are respectively welded and fixed to both sides of the rear end of the bow round steel, and the method specifically comprises the following steps:

[0007] The first step is to cut the upper side surface of the bow round steel to obtain a lap joint surface, and the lower end of the first outer plate is connected to the lap joint surface of the bow round steel;

[0008] The second step is to bevel the lower side of the front end of the bow round steel connected to the first outer plate, so that an inclined plane is obtained after the bevel treatment of the lower side of the front end of the bow round steel, and grind both sides of the front end of the bow round steel;

[0009] The third step is, after the bow round steel is beveled and both sides of the front end of the bow round steel are polished, the first outer plate is connected to the bow round steel, the lower end surface of the first outer plate is connected to the lap surface of the bow round steel, and the first outer plate covers the lap surface; the lower end surface of the first outer plate is overlapped with the lap surface of the bow column round steel, and the end of the lap surface away from the front end of the bow round steel is butt-connected with the side surface of the first outer plate;

[0010] Step 4: Both sides of the overlapped surface of the bow round steel connected to the first outer plate are connected and fixed to the first outer plate by welding, and one end of the overlapped surface away from the front end of the bow round steel is welded and fixed to the side surface of the first outer plate;

[0011] The fifth step is to grind the welding seam between the bow round steel and the first outer plate after the welding is completed, and then weld and fix the second outer plate and the third outer plate to both sides of the bow round steel to complete the connection between the bow column round steel and the outer plate.

[0012] The shape of the overlapping surface obtained by cutting the bow round steel in the first step is the same as the shape of the area where the lower end surface of the first outer plate connected to the overlapping surface is located, and the depth of the overlapping surface is the same as the thickness of the first outer plate.

[0013] The length of the inclined plane obtained after the lower side of the front end of the bow round steel in the above second step is beveled is smaller than the length of the lap joint, and the difference between the length of the inclined plane and the length of the lap joint is not less than 50 mm; the distance between one end of the inclined plane close to the front end of the bow cylinder and the first outer plate is 15 mm-25 mm, and the angle between the inclined plane and the horizontal plane is 30°.

[0014] In the above second step, both sides of the front end of the bow round steel are ground into arc angles for connection.

[0015] When welding the first outer plate side surface and the overlapping surface, the outer plate groove surface of the first outer plate side surface and the round steel groove surface of the overlapping surface of the bow column round steel are respectively opened before welding, and the outer plate groove surface of the first outer plate side surface and the round steel groove surface on the overlapping surface form a V-shaped groove.

[0016] The two sides where the overlapped surface is connected to the first outer plate and the connection between the front end of the bow round steel and the first outer plate are welded by fillet welding.

[0017] Based on the above technical solution, the connection method between the bow round steel and the outer plate of the ship patent of the present invention has achieved the following technical advantages through practical application:

[0018] 1. A method for connecting a bow column round steel and an outer plate of a ship according to the present invention changes the connection between the first outer plate and the bow round steel from a butt connection to an overlap connection, and cuts the bow round steel to increase the connection area between the first outer plate and the bow round steel, reduces the stress concentration between the first outer plate and the bow round steel, is beneficial to the conduction and release of stress, improves the connection strength, and enhances the shipbuilding quality.

[0019] 2. The present invention provides a method for connecting a bow column round steel and an outer plate of a ship. By beveling the lower end of the bow round steel, the stress distribution at the front end of the bow round steel is uniform, which is beneficial to the stress conduction and release of the bow round steel, improves the connection stability between the bow round steel and the first outer plate, and improves the construction quality of the ship.

[0020] 3. The method for connecting the bow column round steel and the outer plate of a ship of the present invention performs cutting processing on the position where the bow round steel is connected to the first outer plate, and does not set a notch groove on the first outer plate, thereby improving the processing efficiency of the first outer plate, ensuring the continuity of the first outer plate, and enhancing the aesthetics of the ship's appearance.

[0021] 4. The method for connecting the bow column round steel and the outer plate of the present invention forms a V-shaped groove when welding the side surface of the first outer plate and the overlapping surface, and then welds, thereby improving the stability of the connection between the first outer plate and the bow round steel and improving the connection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The invention discloses a structural diagram of a connection between a bow round steel and a first outer plate in a method for connecting a bow column round steel and an outer plate of a ship according to the present invention.

[0023] Figure 2 The invention is a method for connecting a ship bow round steel and an outer plate. Figure 1 AA view of the .

[0024] Figure 3 The invention is a method for connecting a ship bow round steel and an outer plate. Figure 1 BB view.

[0025] Figure 4 The invention is a method for connecting a ship bow round steel and an outer plate. Figure 1 A magnified view of CC. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0027] A method for connecting a bow round steel and an outer plate of a ship, wherein a bow is arranged in a bow area of ​​the ship, the bow comprises a bow round steel 1, the bow round steel 1 is connected to a butt outer plate of a hull, the butt outer plate comprises a first outer plate 2, a second outer plate 21 and a third outer plate 22, the side surfaces of the first outer plate 2 are respectively connected to the side surfaces of the second outer plate and the third outer plate 22, the first outer plate 2 is connected to the front of the bow round steel, the second outer plate 21 and the third outer plate 22 are respectively welded and fixed to both sides of the rear end of the bow round steel.

[0028] like Figure 1-4 A method for connecting a bow round steel and an outer plate of a ship specifically comprises the following steps:

[0029] In the first step, the upper side surface of the bow round steel 1 is cut to obtain a lap joint surface 3, and the lower end of the first outer plate 2 is connected to the lap joint surface 3 of the bow round steel 1;

[0030] The second step is to bevel the lower side of the front end of the bow round steel connected to the first outer plate 2, and obtain an inclined plane 4 after the lower side of the front end of the bow round steel is beveled, and grind both sides of the front end of the bow round steel;

[0031] The third step is, after the bow round steel is beveled and both sides of the front end of the bow round steel are polished, the first outer plate 2 is connected to the bow round steel, the lower end surface of the first outer plate 2 is connected to the lap surface 3 of the bow round steel, and the first outer plate 2 covers the lap surface 3; the lower end surface of the first outer plate 2 is overlapped and connected with the lap surface 3 of the bow column round steel 1, and the end of the lap surface 3 away from the front end of the bow round steel is butt-connected with the side of the first outer plate 2;

[0032] Step 4: Both sides of the overlapped surface 3 of the bow round steel connected to the first outer plate 2 are connected and fixed to the first outer plate 2 by welding, and one end of the overlapped surface 3 away from the front end of the bow round steel is welded and fixed to the side surface of the first outer plate 2;

[0033] The fifth step is to grind the welding seam between the bow round steel and the first outer plate 2 after the welding is completed, and then weld and fix the second outer plate 21 and the third outer plate 22 to both sides of the bow round steel to complete the connection between the bow column round steel 1 and the outer plate.

[0034] The shape of the lap surface 3 obtained by cutting the bow round steel in the first step is the same as the shape of the area where the lower end surface of the first outer plate 2 connected to the lap surface 3 is located, and the depth of the lap surface 3 is the same as the thickness of the first outer plate 2; the first outer plate 2 and the bow round steel are changed from butt-jointed to overlapped, and the bow round steel is cut to increase the connection area between the first outer plate 2 and the bow round steel, reduce the stress concentration between the first outer plate 2 and the bow round steel, which is beneficial to the conduction and release of stress, improve the connection strength, and improve the quality of ship construction.

[0035] The length of the inclined plane 4 obtained after the lower side of the front end of the bow round steel in the above-mentioned second step is beveled is smaller than the length of the lap surface 3, and the difference between the length of the inclined plane 4 and the length of the lap surface 3 is not less than 50mm; the distance between the end of the inclined plane 4 close to the front end of the bow cylinder and the first outer plate 2 is 15mm-25mm, and the angle between the inclined plane 4 and the horizontal plane is 30°; by beveling the lower end of the bow round steel, the stress distribution at the front end of the bow round steel is uniform, which is beneficial to the stress conduction and release of the bow round steel, thereby improving the connection stability between the bow round steel and the first outer plate 2 and improving the shipbuilding quality.

[0036] In the above second step, both sides of the front end of the bow round steel are ground into arc angles for connection.

[0037] When the side surface of the first outer plate 2 is welded to the lap surface 3, an outer plate groove surface 51 is opened on the side surface of the first outer plate 2 and a round steel groove surface 52 is opened on the lap surface 3 of the bow column round steel 1 before welding. The outer plate groove surface 51 on the side surface of the first outer plate 2 and the round steel groove surface 52 on the lap surface 3 form a V-shaped groove 5. By forming the V-shaped groove 5 when welding the side surface of the first outer plate 2 to the lap surface 3 and then welding, the stability of the connection between the first outer plate 2 and the bow round steel is improved, and the connection quality is improved.

[0038] The two sides where the lap joint 3 is connected to the first outer plate 2 and the connection between the front end of the bow round steel and the first outer plate 2 are welded by fillet welding.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for connecting a bow column round steel and an outer plate of a ship, wherein a bow column is arranged in a bow area of ​​the ship, the bow column comprises a bow column round steel (1), the bow column round steel (1) is connected to a hull butt outer plate, the butt outer plate comprises a first outer plate (2), a second outer plate (21) and a third outer plate (22), the side surface of the first outer plate (2) is respectively connected to the side surface of the second outer plate (21) and the third outer plate (22), the first outer plate (2) is connected to the front of the bow column round steel (1), the second outer plate (21) and the third outer plate (22) are respectively welded and fixed to both sides of the rear end of the bow column round steel (1), characterized in that: The method specifically comprises the following steps: The first step is to cut the upper side surface of the bow round steel (1) to obtain a lap joint surface (3), and the lower end of the first outer plate (2) is connected to the lap joint surface (3) of the bow round steel (1); The shape of the overlapping surface (3) obtained by cutting the bow column round steel (1) in the first step is the same as the shape of the area where the lower end surface of the first outer plate (2) connected to the overlapping surface (3) is located, and the depth of the overlapping surface (3) is the same as the thickness of the first outer plate (2); The second step is to bevel the lower side of the front end of the bow round steel (1) connected to the first outer plate (2), so that the lower side of the front end of the bow round steel (1) is beveled to obtain an inclined plane (4), and grind both sides of the front end of the bow round steel (1); The length of the inclined plane (4) obtained after the lower side of the front end of the bow round steel (1) is beveled in the second step is less than the length of the overlapping surface (3), and the difference between the length of the inclined plane (4) and the length of the overlapping surface (3) is not less than 50 mm; the distance between the end of the inclined plane (4) close to the front end of the bow round steel (1) and the first outer plate (2) is 15 mm-25 mm, and the angle between the inclined plane (4) and the horizontal plane is 30°; The third step is, after the bow column round steel (1) is beveled and both sides of the front end of the bow column round steel (1) are polished, the first outer plate (2) is connected to the bow column round steel (1), the lower end surface of the first outer plate (2) is connected to the lap surface (3) of the bow column round steel (1), and the first outer plate (2) covers the lap surface (3); the lower end surface of the first outer plate (2) is lap-connected with the lap surface (3) of the bow column round steel (1), and the end of the lap surface (3) away from the front end of the bow column round steel (1) is butt-connected with the side of the first outer plate (2); Step 4: both sides of the overlapped surface (3) of the bow column round steel (1) connected to the first outer plate (2) are connected and fixed to the first outer plate (2) by welding, and one end of the overlapped surface (3) away from the front end of the bow column round steel (1) is welded and fixed to the side surface of the first outer plate (2); In the fifth step, after the welding of the bow round steel (1) and the first outer plate (2) is completed, the welding seam between the bow round steel (1) and the first outer plate (2) is polished, and then the second outer plate (21) and the third outer plate (22) are welded and fixed to both sides of the bow round steel (1), thereby completing the connection work between the bow round steel (1) and the outer plate of the ship.

2. A method for connecting a ship bow round steel and an outer plate according to claim 1, characterized in that: In the second step, both sides of the front end of the bow column round steel (1) are ground into arc angles for connection.

3. The method for connecting the bow round steel and the outer plate of a ship according to claim 1, characterized in that: When welding the side surface of the first outer plate (2) and the overlapping surface (3), an outer plate groove surface (51) is formed on the side surface of the first outer plate (2) and a round steel groove surface (52) is formed on the overlapping surface (3) of the bow column round steel (1) before welding, and the outer plate groove surface (51) on the side surface of the first outer plate (2) and the round steel groove surface (52) on the overlapping surface (3) form a V-shaped groove (5).

4. The method for connecting the bow round steel and the outer plate of a ship according to claim 1, characterized in that: The two sides where the lap joint (3) is connected to the first outer plate (2) and the connection between the front end of the bow column round steel (1) and the first outer plate (2) are welded by fillet welding.

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