A method of welding a hull platform panel to an outer panel

Abstract

The present application relates to the technical field of shipbuilding, and discloses a welding method for a ship platform plate and an outer plate, which comprises the following steps: S1, measuring the thickness t of the platform plate; S2, butting the platform plate and the outer plate, with the outer edge of the lower end surface of the platform plate being connected to the outer plate; S3, measuring the maximum gap G between the inner side wall of the outer plate and the outer edge of the upper end surface of the platform plate and the included angle θ formed between the inner side wall of the outer plate and the lower end surface of the platform plate; S4, cutting the outer edge of the platform plate under the conditions of the thickness t, the maximum gap G and the included angle θ; S5, abutting the platform plate and the outer plate, with the first welding position being formed between the inner side wall of the outer plate and the outer edge of the upper end surface of the platform plate and the second welding position being formed between the inner side wall of the outer plate and the outer edge of the lower end surface of the platform plate; S6, opening a groove on the first welding position; and S7, sequentially welding along the first welding position and the second welding position to form the first weld and the second weld respectively. The welding method for the ship platform plate and the outer plate can reduce the workload of welding and ensure the welding quality.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a welding method for ship platform plates and outer plates. Background Technology

[0002] Ship outer plating is generally linear, not straight; especially the bow and stern sides of the ship are more linear. In existing technology, platform plates and ship outer plating are generally not placed perpendicular to each other, and platform plates have a certain thickness, so the welding points between them are usually at an angle, resulting in a gap between them. The greater the thickness of the platform plate, the larger the maximum gap, requiring more welding wire to fill the gap, and the welding quality is difficult to guarantee. Summary of the Invention

[0003] The purpose of this invention is to provide a welding method between a ship hull platform plate and an outer plate that can reduce the amount of welding work and ensure welding quality.

[0004] To achieve the above objectives, the present invention provides a welding method for a ship hull platform plate and an outer plate, comprising the following steps:

[0005] S1, Measure the thickness t of the platform plate;

[0006] S2. Connect the platform plate to the outer plate, with the outer edge of the lower end face of the platform plate connected to the outer plate;

[0007] S3. Measure the maximum gap G between the inner sidewall of the outer plate and the outer edge of the upper end face of the platform plate, and the included angle θ between the inner sidewall of the outer plate and the lower end face of the platform plate.

[0008] S4. Using the thickness t, the maximum gap G, and the included angle θ as conditions, select a cutting height and cut the outer edge of the platform plate;

[0009] S5. The cut platform plate and the outer plate abut against each other, and a first welding position is formed between the inner sidewall of the outer plate and the outer edge of the upper end face of the platform plate, and a second welding position is formed between the inner sidewall of the outer plate and the outer edge of the lower end face of the platform plate.

[0010] S6. Make a bevel at the first welding position;

[0011] S7. Weld along the first welding position and the second welding position to form the first weld and the second weld respectively.

[0012] Furthermore, in S4, when the maximum gap G ≤ 3mm, the platform plate is not cut.

[0013] Furthermore, in S4, when the maximum gap G > 3mm, the outer edge of the platform plate is cut from bottom to top to form a connecting portion, and the end face of the connecting portion is parallel to the inner sidewall of the outer plate.

[0014] Furthermore, when the included angle θ ≥ 50°, the cutting height is 0.9t~t.

[0015] Furthermore, when the included angle is 45°≤θ<50° and the thickness t>12mm, the cutting height is 0.4t~0.6t.

[0016] Furthermore, the weld leg height of the first weld is greater than 0.25t.

[0017] Furthermore, when the included angle θ < 45° and the thickness t > 12mm, the cutting height is 0.3t to 0.35t.

[0018] Furthermore, the weld leg height of the first weld is 0-2mm.

[0019] Furthermore, in S6, the bevel angle can be selected as 20°, 35°, 45°, or 60°.

[0020] Compared with the prior art, the welding method for platform plate and outer plate of a ship hull according to an embodiment of the present invention has the following advantages: by cutting the outer edge of the platform plate to shorten the gap between the platform plate and the outer plate, the welding is more compact, the number of welding times is reduced, the connection strength is high, and the welding quality is good. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the welding method between the hull platform plate and the outer plate according to an embodiment of the present invention;

[0022] Figure 2 A flowchart illustrating the welding method between the hull platform plate and the outer plate in an embodiment of the present invention ( Figure 2 The conditions A, B, C, D, and E in the text are labeled and Figure 1 (corresponding in the text);

[0023] In the diagram, 1 is the platform plate; 11 is the inner bottom plate; and 1101 is the offset point.

[0024] 2. Outer panel;

[0025] 3. First weld;

[0026] 4. Second weld;

[0027] 5. Connecting parts; Detailed Implementation

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] In the description of this invention, the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "lateral," and "longitudinal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0030] In the description of this invention, the terms "provided with," "set up," "connected," and "placed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0032] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0033] like Figure 1 , 2As shown in the preferred embodiment of the present invention, a welding method for a hull platform plate and an outer plate includes the following steps: S1, measuring the thickness t of the platform plate 1; S2, butt-jointing the platform plate 1 and the outer plate 2, with the lower end surface of the platform plate 1 connected to the outer plate 2; S3, measuring the maximum gap G between the inner wall of the outer plate 2 and the upper end surface of the platform plate 1, and the included angle θ between the inner wall of the outer plate 2 and the lower end surface of the platform plate 1; S4, selecting a cutting height based on the thickness t, the maximum gap G, and the included angle θ, and cutting the outer edge of the platform plate 1; S5, abutting the cut platform plate 1 and the outer plate 2 together, forming a first welding position between the inner wall of the outer plate 2 and the upper end surface of the platform plate 1, and a second welding position between the inner wall of the outer plate 2 and the lower end surface of the platform plate 1; S6, beveling at the first welding position; S7, sequentially welding along the first welding position and the second welding position to form a first weld 3 and a second weld 4, respectively.

[0034] Based on the above technical solution, the maximum gap G, the included angle θ, and the thickness t are measured before welding. Then, the outer edge of the platform plate 1 is cut according to the above data. By cutting the outer edge of the platform plate 1, the gap distance between the platform plate 1 and the outer plate 2 is shortened, making the welding more compact, reducing the number of welding times, increasing the connection strength, and improving the welding quality.

[0035] Preferably, in S4, when the maximum gap G ≤ 3mm, the platform plate 1 is not cut (corresponding to...). Figure 1 (Condition A) Since the maximum gap G≤3mm, that is, the distance between platform plate 1 and outer plate 2 is very small, the welding is compact enough and multiple welding is avoided, so there is no need to cut platform plate 1, and welding can be done directly.

[0036] Preferably, in step S4, when the maximum gap G > 3mm, the outer edge of the platform plate 1 is cut from bottom to top to form a connecting portion 5, and the end face of the connecting portion 5 is parallel to the inner sidewall of the outer plate 2. In step S4, the end face of the connecting portion 5 formed after the platform plate 1 is cut is parallel to the inner sidewall of the outer plate 2, which facilitates the connection portion 5 to abut against the inner sidewall of the outer plate 2. After abutting, the gap distance between the outer edge of the platform plate 1 and the inner sidewall of the outer plate 2 is shortened, making the welding more compact; and the shape of the connecting portion 5 matches the inner sidewall of the outer plate 2, which facilitates welding and makes the welding more stable.

[0037] Specifically, see the attached document. Figure 1 It is understandable that the included angle θ is in the range of 0 to 90°. The larger the included angle θ is, the closer the outer edge of the platform plate 1 is to the inner wall of the outer plate 2 until it is completely attached to the inner wall of the outer plate 2.

[0038] More preferably, when the included angle θ ≥ 50° (corresponding to Figure 1Under condition B), the cutting height is 0.9t to t. When the included angle θ ≥ 50°, that is, the outer edge of the platform plate 1 is relatively close to the inner side wall of the outer plate 2, the preferred cutting height is t. The cutting height is large, and at the same time, since the included angle θ is also large, the cutting amount of the platform plate 1 is small, which can meet the requirements of compact welding and reduced welding amount without excessive consumption of plate material.

[0039] More preferably, when the included angle is 45° ≤ θ < 50° and the thickness t > 12 mm (corresponding to...) Figure 1 Under condition C), the cutting height is 0.4t to 0.6t. When the included angle is 45°≤θ<50° and the thickness t>12mm, that is, the outer edge of the platform plate 1 is relatively far from the inner wall of the outer plate 2, and the gap between the outer edge of the platform plate 1 and the inner wall of the outer plate 2 is large, the cutting height is preferably 0.5t. If a large cutting height is maintained at this time, the cutting amount of the outer edge of the platform plate 1 will be large, which will not only waste the plate material, but may also lead to the risk that the dimensions after cutting will not meet the assembly requirements. Therefore, the cutting height is reduced to ensure that the connecting part 5 can fit with the inner wall of the outer plate 2 while ensuring the assembly dimensions.

[0040] More preferably, the weld leg height of the first weld 3 is greater than 0.25t. Since the cutting height is relatively small, the contact area between the connecting part 5 and the inner sidewall of the outer plate 2 is small. Therefore, it is necessary to set the weld leg height of the first weld 3 to be greater than 0.25t during welding to increase the connection strength of the first weld 3 and ensure the welding quality.

[0041] Preferably, when the included angle θ < 45° and the thickness t > 12 mm (corresponding to...) Figure 1 Under condition D), the cutting height is 0.3t to 0.35t. When the included angle θ < 45° and the thickness t > 12mm, that is, the outer edge of the platform plate 1 is relatively further away from the inner wall of the outer plate 2, the gap distance between the outer edge of the platform plate 1 and the inner wall of the outer plate 2 is larger. Therefore, the preferred cutting height is 0.33t. If a larger cutting height is maintained at this time, the cutting amount of the outer edge of the platform plate 1 will be large, which will not only waste the plate material, but may also lead to the risk that the dimensions after cutting will not meet the assembly requirements. Therefore, the cutting height is further reduced to ensure that the connecting part 5 can fit with the inner wall of the outer plate 2 while ensuring the assembly dimensions.

[0042] More preferably, the weld leg height of the first weld 3 is 0-2 mm. Since the cutting height is relatively small, the contact area between the connecting part 5 and the inner sidewall of the outer plate 2 is smaller. Therefore, the weld leg height of the first weld 3 is preferably 0.1 mm. If the weld height is further increased, more welding work will be required because the gap between the platform plate 1 and the outer plate 2 is large. This ensures the connection strength of the first weld 3 while minimizing the amount of welding work.

[0043] Preferably, in S6, the bevel angle can be selected as 20°, 35°, 45°, or 60°. Since the platform plate 1 and the outer plate 2 may have different angles at different positions (the outer plate 2 may have linear changes), in order to avoid frequent angle adjustments when beveling on site, a maximum of three bevel angles can be taken on the same platform plate 1 to improve construction efficiency.

[0044] In one specific embodiment, the platform plate 1 further includes an inner bottom plate 11. It should be noted that the following method is only applied to the inner bottom plate 11. In S4, when the angle θ between the inner bottom plate 11 and the outer plate 2 is < 50° and the thickness t of the inner bottom plate 11 is ≤ 12mm (corresponding to...) Figure 1 In condition E), in the horizontal direction, the outer edge of the lower end face of the inner base plate 11 is offset inward by an offset point 1101. The offset distance between the offset point 1101 and the outer edge of the lower end face of the inner base plate 11 is α = t / tan70°. A cutting line is provided between the offset point 1101 and the outer edge of the upper end face of the inner base plate 11. After cutting along the cutting line, in S5, the platform plate 1 is abutted against the outer plate 2 through the offset point 1101. A 20° bevel is opened at the first welding position, and the first weld 3 and the second weld 4 are formed sequentially along the first welding position and the second welding position, respectively. The welding height of the first weld 3 is preferably 4mm.

[0045] In summary, the present invention provides a welding method for a ship hull platform plate and an outer plate. By cutting a connecting part 5 parallel to the inner wall of the outer plate on the platform plate, the connecting part 5 is fitted to the inner wall of the outer plate, shortening the gap distance between the outer edge of the platform plate and the inner wall of the outer plate, making the welding more compact, reducing the number of welding operations, resulting in high connection strength and good welding quality.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for welding a ship hull platform plate to an outer plate, characterized in that, Includes the following steps: S1, Measure the thickness t of the platform plate; S2. Connect the platform plate to the outer plate, with the outer edge of the lower end face of the platform plate connected to the outer plate; S3. Measure the maximum gap G between the inner sidewall of the outer plate and the outer edge of the upper end face of the platform plate, and the included angle θ between the inner sidewall of the outer plate and the lower end face of the platform plate. S4. Using the thickness t, the maximum gap G, and the included angle θ as conditions, select a cutting height and cut the outer edge of the platform plate; S5. The cut platform plate and the outer plate abut against each other, and a first welding position is formed between the inner sidewall of the outer plate and the outer edge of the upper end face of the platform plate, and a second welding position is formed between the inner sidewall of the outer plate and the outer edge of the lower end face of the platform plate. S6. Make a bevel at the first welding position; S7. Weld along the first welding position and the second welding position to form the first weld and the second weld respectively; In S4, when the maximum gap G ≤ 3mm, the platform plate is not cut. In S4, when the maximum gap G > 3mm, the outer edge of the platform plate is cut from bottom to top to form a connecting part, and the end face of the connecting part is parallel to the inner sidewall of the outer plate. When the included angle θ ≥ 50°, the cutting height is 0.9t~t; When the included angle is 45°≤θ<50° and the thickness t>12mm, the cutting height is 0.4t~0.6t, and the weld leg height of the first weld is greater than 0.25t; When the included angle θ < 45° and the thickness t > 12mm, the cutting height is 0.3t~0.35t, and the weld leg height of the first weld is 0~2mm.

2. The welding method for the hull platform plate and the outer plate according to claim 1, characterized in that, In S6, the bevel angle can be selected as 20°, 35°, 45°, or 60°.

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