A method for butt welding of different height ellipsoidal transition sections

Abstract

The application discloses a kind of methods for butt welding of different height ball flat steel transition section, and the method specifically includes the following steps: S1, the height size of two ball flat steels for butt welding is determined;S2, the size of transition section ball flat steel is determined;S3, the cutting angle θ is obtained;S4, the first cutting size A is obtained, the second cutting size B is obtained and the third cutting size C is obtained;According to the cutting angle θ and the height H1 of the first ball flat steel, the fourth cutting size D is obtained;S5, determine the size of blanking ball flat steel;S6, transition section ball flat steel cutting;S7, the first cutting line is obtained, the second cutting line is obtained and the third cutting line is obtained;S8, the transition section ball flat steel is obtained, and the butt welding of ball flat steel is completed.The application realizes the butt welding of different height ball flat steel by using transition section ball flat steel, avoids cutting and fire attack processing to the butt joint ball flat steel, reduces the construction difficulty, and improves the overall strength after the butt welding of ball flat steel.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a method for butt welding of transition sections of spherical flat steel at different heights. Background Technology

[0002] With the continuous development of society, China's shipbuilding industry is receiving increasing attention from countries around the world. New technologies and processes are constantly emerging. To keep pace with or even surpass the world's leading shipbuilding standards, it is essential to continuously improve the technological content, making shipbuilding more intelligent, automated, and efficient. "Digital shipbuilding" will permeate all aspects of shipbuilding. In ship production and construction, the problem of joining bulb flats of different heights is often encountered. To ensure a smooth transition, a transition section is typically added between the two heights of bulb flats, ensuring that the ship's structural strength and aesthetic appearance are not affected.

[0003] Currently, most shipyards typically cut a triangular piece from the web near the bulb head of higher-specification bulb flat steel, then bend the bulb head down to the remaining web, thus joining bulb flat steel of different heights. This process is convenient for the initial design phase and material sourcing, but extremely difficult for on-site assembly workers. This method essentially requires on-site assembly personnel to perform a secondary cutting after receiving the bulb flat steel transition section, and direct welding is not possible. Traditionally, construction workers cut off the triangle under the bulb head before bending it down. The bulb head of the bulb flat steel is much thicker than the web, and its triangular shape provides high rigidity and strength. Even after heat treatment, direct bending is time-consuming and labor-intensive, essentially relying on brute force with tools. After bending, welding is still required to complete the transition section cutting. With the new method, by calculating the bulb flat steel transition section, on-site construction workers can accurately cut the shape of the transition section directly based on the cutting data and the cutting data drawn from the construction sketches. Assembly workers can then install it directly without secondary material marking. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for butt welding of transition sections of spherical flat steel with different heights. The method of this invention achieves butt welding of spherical flat steel with different heights by using transition section spherical flat steel, avoiding cutting and heat treatment of the butt spherical flat steel, reducing construction difficulty, improving construction efficiency, and improving the overall strength of the butt welded spherical flat steel.

[0005] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows:

[0006] A method for butt welding of transition sections of bulb flat steel with different heights, the method specifically includes the following steps:

[0007] S1, determine the height dimensions of the two ball flats to be butt-welded, with the height of the first ball flat being H1 and the height of the second ball flat being H2;

[0008] S2, determine the dimensions of the transition section bulb flat steel. The length of the transition section bulb flat steel is the design length L1. The height dimension of one side of the transition section bulb flat steel is equal to the height of the first bulb flat steel, and the height dimension of the other side of the transition section bulb flat steel is equal to the height of the second bulb flat steel.

[0009] S3. Based on the height of the first ball flat bar being H1, the height of the second ball flat bar being H2, and the design length being L1, obtain the cutting angle θ.

[0010] S4, obtain the first cutting dimension A based on the cutting angle θ and the height H2 of the second spherical flat steel; obtain the second cutting dimension B based on the obtained first cutting dimension A and the height H1 of the first spherical flat steel; obtain the third cutting dimension C based on the cutting angle θ and the height H2 of the second spherical flat steel; obtain the fourth cutting dimension D based on the cutting angle θ and the height H1 of the first spherical flat steel.

[0011] S5, determine the size of the blanking ball flat steel, obtain the height H of the blanking ball flat steel according to the cutting angle θ, the second cutting dimension B and the height H2 of the second ball flat steel, and obtain the length L of the blanking ball flat steel according to the design length L1, the cutting angle θ and the third cutting dimension C;

[0012] S6, Cutting of transition section ball flat steel: Select the ball flat steel of the corresponding size according to the determined size of the ball flat steel. Measure the first cutting dimension A on one side of the ball head of the ball flat steel and mark the first cutting point. Measure the second cutting dimension B on the side of the web of the ball flat steel below the first cutting point and mark the second cutting point. Measure the third cutting dimension C on the bottom edge of the web of the ball flat steel on the other side and mark the third cutting point.

[0013] S7, connect the first cutting point and the second cutting point to obtain the first cutting line, connect the third cutting point to the ball head of the blanking section of the bulb flat steel on the same side to obtain the second cutting line; starting from the third cutting point, measure the fourth cutting dimension D along the second cutting line and mark the fourth cutting point, connect the second cutting point and the fourth cutting point to obtain the third cutting line;

[0014] S8. Cut the blanking section bulb flat steel along the first cutting line, the second cutting line and the third cutting line to obtain the transition section bulb flat steel. The transition section bulb flat steel on one side of the first cutting line is welded and fixed to the side of the second bulb flat steel. The transition section bulb flat steel on one side of the second cutting line is welded and fixed to the side of the first bulb flat steel, thus completing the butt welding of the bulb flat steel.

[0015] Furthermore, the length of the transition section bulb flat steel is the designed length L1, which is 500 mm.

[0016] Further, the formula for obtaining the cutting angle θ is specifically:

[0017] tanθ = (H1-H2) ÷ L1,

[0018] The cutting angle θ is calculated according to the tangent value of the cutting angle.

[0019] Further, the formula for obtaining the first cutting size A is specifically A = H2 sin θ, the formula for obtaining the second cutting size B is specifically B = H1-H2 cos θ, the formula for obtaining the third cutting size C is specifically C = H1 tan θ, and the formula for obtaining the fourth cutting size D is specifically D = H1 ÷ cos θ-H1.

[0020] Further, the formula for obtaining the length L of the blanked bulb flat steel is specifically L = A + cos θ L1.

[0021] Further, the first cutting line is perpendicular to the third cutting line, and the second cutting line is perpendicular to the third cutting line.

[0022] Further, the angle between the first cutting line and the side surface of the blanked bulb flat steel is equal to the cutting angle θ, and the length of the third cutting line is equal to the designed length L1.

[0023] Based on the above technical solution, the method for butt welding of transition sections of bulb flat steels with different heights has the following technical advantages after practical application:

[0024] 1. The method for butt welding of transition sections of bulb flat steels with different heights realizes butt welding of bulb flat steels with different heights by using transition section bulb flat steels, avoids cutting and fire attack processing of the butt-jointed bulb flat steels, reduces the construction difficulty, improves the construction efficiency, and improves the overall strength of the bulb flat steels after butt welding.

[0025] 2. The method for butt welding of transition sections of bulb flat steels with different heights can calculate and determine the size of the transition section bulb flat steel according to the height of the butt-jointed bulb flat steel, facilitate cutting processing of the transition section bulb flat steel, and improve the efficiency of butt welding of bulb flat steels with different sizes of ships.

[0026] 3. The method for butt welding of transition sections of bulb flat steels with different heights ensures the integrity of the butt-jointed bulb flat steels by using the transition section bulb flat steels, reduces the processing amount of the butt-jointed bulb flat steels, and improves the strength of the welded butt joint. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a conventional bulb flat steel butt welding cutting structure in the method for butt welding of transition sections of bulb flat steels with different heights.

[0028] Fig. 2 is a different height ball flat steel butt welding structure diagram in a method for butt welding of different height ball flat steel transition sections.

[0029] Fig. 3 is a transition section ball flat steel cutting structure diagram in a method for butt welding of different height ball flat steel transition sections. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described below by specific examples shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0031] As shown in Figs. 1-3 , the present application belongs to a method for butt welding of different height ball flat steel transition sections, which specifically comprises the following steps:

[0032] S1, determining the height size of the two ball flat steels for butt welding, the height of the first ball flat steel 1 is H1, and the height of the second ball flat steel 2 is H2;

[0033] S2, determining the size of the transition section ball flat steel 3, the length of the transition section ball flat steel 3 is the design length L1, the height size of one side of the transition section ball flat steel 3 is equal to the height of the first ball flat steel 1, and the height size of the other side of the transition section ball flat steel 3 is equal to the height of the second ball flat steel 2;

[0034] S3, obtaining the cutting angle θ according to the height H1 of the first ball flat steel 1, the height H2 of the second ball flat steel 2 and the design length L1;

[0035] S4, obtaining the first cutting size A according to the cutting angle θ and the height H2 of the second ball flat steel 2; obtaining the second cutting size B according to the obtained first cutting size A and the height H1 of the first ball flat steel 1; obtaining the third cutting size C according to the cutting angle θ and the height H2 of the second ball flat steel 2; obtaining the fourth cutting size D according to the cutting angle θ and the height H1 of the first ball flat steel 1;

[0036] S5, determining the size of the blanking ball flat steel 4, obtaining the height H of the blanking ball flat steel 4 according to the cutting angle θ, the second cutting size B and the height H2 of the second ball flat steel 2, and obtaining the length L of the blanking ball flat steel 4 according to the design length L1, the cutting angle θ and the third cutting size C;

[0037] S6, the transition section of the ball flat steel 3 is cut, the blanking ball flat steel 4 corresponding to the size is selected according to the determined size of the blanking ball flat steel 4, the first cutting size A is measured at the ball head side of the blanking ball flat steel 4, and the first cutting point 41 is marked, the second cutting size B is measured at the web side of the blanking ball flat steel 4 at the lower end of the first cutting point 41, and the second cutting point 42 is marked, and the third cutting size C is measured at the bottom edge of the web on the other side of the blanking ball flat steel 4, and the third cutting point 43 is marked;

[0038] S7, the first cutting point 41 and the second cutting point 42 are connected to obtain the first cutting line 51, and the third cutting point 43 is connected with the ball head of the blanking section of the ball flat steel to obtain the second cutting line 52; the fourth cutting size D is measured from the third cutting point 43 along the second cutting line 52, and the fourth cutting point 44 is marked, and the second cutting point 42 and the fourth cutting point 44 are connected to obtain the third cutting line 53;

[0039] S8, the blanking section of the ball flat steel is cut along the first cutting line 51, the second cutting line 52 and the third cutting line 53 to obtain the transition section of the ball flat steel 3, the transition section of the ball flat steel 3 on one side of the first cutting line 51 is welded and fixed with the side surface of the second ball flat steel 2, the transition section of the ball flat steel 3 on one side of the second cutting line 52 is welded and fixed with the side surface of the first ball flat steel 1, and the butt welding of the ball flat steel is completed; the butt welding of the ball flat steel of different heights is realized by using the transition section of the ball flat steel 3, the cutting and fire attack processing of the butt joint ball flat steel is avoided, the construction difficulty is reduced, the construction efficiency is improved, and the overall strength of the ball flat steel after butt welding is improved.

[0040] Only when the transition section of the ball flat steel 3 is welded with the butt joint ball flat steel, welding work is required, and in addition, no additional fire attack processing or cutting operation is required for the butt joint ball flat steel, so as to avoid damaging the overall strength of the ball flat steel.

[0041] The length of the transition section of the ball flat steel 3 is the design length L1, which is 500mm.

[0042] The formula for obtaining the cutting angle θ is specifically:

[0043] tanθ=(H1-H2)÷L1,

[0044] The cutting angle θ is calculated according to the tangent value of the cutting angle.

[0045] The formula for obtaining the first cutting size A is specifically A=H2·sinθ, the formula for obtaining the second cutting size B is specifically B=H1-H2·cosθ, the formula for obtaining the third cutting size C is specifically C=H1·tanθ, and the formula for obtaining the fourth cutting size D is specifically D=H1÷cosθ-H1.

[0046] The formula for obtaining the length L of the blanked bulb bar 4 is L=A+cosθ·L1.

[0047] The first cutting line 51 is perpendicular to the third cutting line 53, and the second cutting line 52 is perpendicular to the third cutting line 53.

[0048] The angle between the first cutting line 51 and the side of the blanked bulb bar 4 is equal to the cutting angle θ, and the length of the third cutting line 53 is equal to the designed length L1.

[0049] The size of the transition bulb bar 3 can be determined according to the height of the butt-jointed bulb bar, facilitating the cutting and processing of the transition bulb bar 3 and improving the efficiency of butt-welding of bulb bars of different sizes of a ship.

[0050] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific implementation of the present application can be modified or some technical features can be replaced by equivalent ones without departing from the spirit of the technical solutions of the present application, and all of them should be covered in the technical solution range claimed by the present application.

Claims

1. A method for butt welding of transition sections of different height and bulb steel, characterized in that, The method specifically comprises the following steps: S1, determining the height size of the two butt-welded bulb flats, the height of the first bulb flat being H1 and the height of the second bulb flat being H2; S2, determining the size of the transition section bulb flat, the length of the transition section bulb flat being a design length L1, the height size of one side of the transition section bulb flat being equal to the height of the first bulb flat, and the height size of the other side of the transition section bulb flat being equal to the height of the second bulb flat; S3, obtaining a cutting angle θ according to the height H1 of the first bulb flat, the height H2 of the second bulb flat and the design length L1; S4, obtaining a first cutting size A according to the cutting angle θ and the height H2 of the second bulb flat, obtaining a second cutting size B according to the obtained first cutting size A and the height H1 of the first bulb flat, obtaining a third cutting size C according to the cutting angle θ and the height H2 of the second bulb flat, and obtaining a fourth cutting size D according to the cutting angle θ and the height H1 of the first bulb flat; S5, determining the size of the blanking bulb flat, obtaining the height H of the blanking bulb flat according to the cutting angle θ, the second cutting size B and the height H2 of the second bulb flat, and obtaining the length L of the blanking bulb flat according to the design length L1, the cutting angle θ and the third cutting size C; S6, cutting the transition section bulb flat, selecting a blanking bulb flat corresponding to the size according to the determined size of the blanking bulb flat, measuring the first cutting size A on one side of the bulb head of the blanking bulb flat and marking a first cutting point, measuring the second cutting size B on the web side of the blanking bulb flat at the lower end of the first cutting point and marking a second cutting point, and measuring the third cutting size C on the bottom edge of the other side of the web of the blanking bulb flat and marking a third cutting point; S7, connecting the first cutting point and the second cutting point to obtain a first cutting line, and connecting the third cutting point and the bulb head of the blanking section bulb flat on the same side to obtain a second cutting line; S8, cutting the blanking section bulb flat along the first cutting line, the second cutting line and the third cutting line to obtain the transition section bulb flat, welding and fixing the transition section bulb flat on one side of the first cutting line to the side surface of the second bulb flat, welding and fixing the transition section bulb flat on one side of the second cutting line to the side surface of the first bulb flat, and completing the butt welding of the bulb flat. The length of the transition section bulb flat is the design length L1, which is 500 mm.

2. The method for butt welding of transition sections of different height and flatness of steel according to claim 1, characterized in that, The formula for obtaining the cutting angle θ is specifically:

3. The method for butt welding of transition sections of different height and flatness of steel according to claim 1, characterized in that, tan θ = (H1-H2) ÷ L1, the tangent value of the cutting angle θ is calculated according to the cutting angle. The formula for obtaining the first cutting size A is specifically A = H2·sin θ, the formula for obtaining the second cutting size B is specifically B = H1-H2·cos θ, the formula for obtaining the third cutting size C is specifically C = H1·tan θ, and the formula for obtaining the fourth cutting size D is specifically D = H1 ÷ cos θ-H1.

4. The method for butt welding of transition sections of different height bulb steel according to claim 3, characterized in that, The formula for obtaining the length L of the blanking bulb flat is specifically L = A+cos θ·L1.

5. The method for butt welding of transition sections of different height bulb steel according to claim 4, characterized in that, The first cutting line is perpendicular to the third cutting line, and the second cutting line is perpendicular to the third cutting line.

6. The method for butt welding of different height bulb flat steel transition sections according to claim 1, characterized in that, ​ 7. The method for butt welding of transition sections of different height bulb steel according to claim 6, characterized in that, The angle between the first cutting line and the side surface of the blanked bulb steel is equal to the cutting angle θ, and the length of the third cutting line is equal to the design length L1.

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