CN117324721A

CN117324721A - Welding method of high-strength steel plate and ship

Info

Publication number: CN117324721A
Application number: CN202311565802.2A
Authority: CN
Inventors: 卓振坚; 王彦龙; 邵丹丹; 曹荣; 曾鹤鸣
Original assignee: CSSC Huangpu Wenchong Shipbuilding Co Ltd
Current assignee: CSSC Huangpu Wenchong Shipbuilding Co Ltd
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-01-02

Abstract

The invention discloses a welding method of a high-strength steel plate and a ship, belonging to the technical field of ship construction, and comprising the following steps: s1, taking two plates, wherein the plates are provided with I-shaped grooves; s2, butting two plates to form a jointed board, and forming a gap at the butting position of the two plates; s3, installing arc striking and extinguishing plates at the initial section and the tail end of the gap, and arranging a liner on the back of the gap of the jointed board; s4, limiting the jointed boards by using a tool fixture; s5, welding the jointed boards by adopting a deep melting arc to form a welding plate, and forming an I-shaped welding seam in the gap; s6, removing the arc striking and extinguishing plate and the gasket from the welding plate. According to the welding method of the high-strength steel plate and the ship, the welding of the jointed boards is performed by adopting the deep melting arc technology, and a groove is not required to be formed in the plate, so that the single-sided welding and double-sided forming are realized, and the welding efficiency is improved. The workload of forming the groove by machining is avoided, the construction efficiency is improved, a filling structure is avoided being formed at the groove, the filling amount of welding materials is reduced, and the cost is reduced.

Description

Welding method of high-strength steel plate and ship

Technical Field

The invention relates to the technical field of ship construction, in particular to a welding method of a high-strength steel plate and a ship.

Background

In the structural construction process of high-strength steel plates in the fields of ships, steel structures and the like, double-sided welding is often required for the medium-thickness high-strength steel plates with the thickness of 3mm to 15mm. However, on one hand, the welding process needs to hoist and turn over the high-strength steel plate, so that the welding deformation is controlled, the workload is large, the welding efficiency is influenced, and the welding quality is difficult to ensure. On the other hand, the high-strength steel plate is required to be provided with a single-sided groove or a double-sided groove, so that the machining amount and the welding filling amount are increased, the efficiency is further influenced, and the cost is increased.

Disclosure of Invention

The invention aims to provide a welding method of a high-strength steel plate and a ship, which solve the problem that the high-strength steel plate needs to be hoisted and turned over to control deformation in the welding process, solve the problem that the machining amount and the filling amount are increased due to the arrangement of grooves, improve the construction efficiency and reduce the cost.

To achieve the purpose, the invention adopts the following technical scheme:

a method of welding a high strength steel sheet, comprising:

taking two plates, wherein the plates are provided with I-shaped grooves;

butting two plates to form a jointed board, and forming a gap at the butting position of the two plates;

installing arc striking and extinguishing plates at the initial section and the tail end of the gap, and arranging a liner on the back surface of the gap of the jointed board;

limiting the jointed boards by using a tooling fixture;

welding the jointed boards by adopting a deep melting arc to form a welding plate, and forming an I-shaped welding seam in the gap;

the arc striking plate and the liner are removed from the welding plate.

In some possible embodiments, the fixture jig comprises a first jig and a second jig, the first jig is used for limiting the periphery of the jointed board, and the second jig is in press connection with one of the boards.

In some possible embodiments, the first jig includes a plurality of fastener, a plurality of fastener is enclosed and is located around the makeup, the fastener includes interconnect's diaphragm and riser, the diaphragm with the riser is perpendicular, just riser one end connect in the bottom of diaphragm, the other end of riser is connected in external structure, makes the diaphragm supports and presses the front of panel.

In some possible embodiments, the second jig includes a plurality of iron blocks, and the plurality of iron blocks are pressed on the front surface of the plate at intervals.

In some possible embodiments, before the two plates are butted to form a jigsaw, and a gap is formed at the butted position of the two plates, the method further comprises:

cleaning an oxide layer of the butt joint surface of the plate in a mechanical polishing mode;

and cleaning impurities within a range of 20mm-30mm away from the butt joint surface of the plates.

In some possible embodiments, the welding plate is formed by welding the jointed plates by using a deep melting arc, and when the gap forms an I-shaped welding line, the welding is performed from the middle to the two sides of the gap when the length of the gap is greater than 5 m.

In some possible embodiments, when welding the panels using a deep-drawn arc to form a welded plate, a JM-56 wire having a diameter of 1.6mm, a welding current of 650A-670A, a welding voltage of 30V-36V, and a welding speed of 50cm/min-70cm/min is used to form an I-type weld.

In some possible embodiments, the gap spacing is 0-1mm.

In some possible embodiments, the thickness of the sheet is 3mm to 15mm.

A ship comprising a welded plate formed by the welding method of a high-strength steel plate as described above.

The invention has the beneficial effects that:

according to the welding method of the high-strength steel plate and the ship, the deep-melting arc technology is adopted to weld the jointed boards, so that the I-shaped groove is formed in the board, namely, the groove is not required to be formed, single-sided welding and double-sided forming are realized, and the welding efficiency is improved. In addition, the workload of forming the groove by machining is avoided from being increased, the construction efficiency is further improved, a filling structure is avoided from being formed at the groove, the filling amount of welding materials is reduced, the using amount of the welding materials is reduced, and the cost is reduced. The welding method is suitable for welding the medium plates in various welding fields such as ships, steel structures and the like, and can reduce machining quantity and welding filling quantity and improve construction efficiency. Limiting the jointed board through the tool, preventing deformation in the welding process, namely effectively controlling welding deformation of the jointed board, avoiding lifting and turning over in the welding process, reducing workload, further improving construction efficiency and ensuring welding quality.

Drawings

Fig. 1 is a flowchart of a welding method of a high-strength steel plate according to an embodiment of the present invention;

FIG. 2 is a schematic view of two panels according to an embodiment of the present invention butted together to form a panel;

FIG. 3 is a schematic view of limiting a panel using a tooling fixture according to an embodiment of the present invention;

FIG. 4 is a schematic view of welding panels according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a card code according to an embodiment of the present invention.

In the figure:

1. a sheet material; 2. an arc striking and extinguishing plate; 3. splicing plates; 4. tool fixture; 41. a first jig; 411. a card code; 4111. a cross plate; 4112. a riser; 42. a second jig; 421. pressing iron blocks; A. a slit.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1 to 5, the present embodiment provides a ship including a welding plate, and also provides a welding method for welding a high-strength steel plate forming the welding plate. The welding method of the high-strength steel plate comprises the following steps:

s1, taking two plates 1, wherein the plates 1 are provided with I-shaped grooves;

s2, butting the two plates 1 to form a jointed board 3, and forming a gap A at the butting position of the two plates 1;

s3, installing an arc striking and extinguishing plate 2 at the initial section and the tail end of the gap A, and arranging a liner on the back of the gap A of the jointed board 3;

s4, limiting the jointed board 3 by using the tooling jig 4;

s5, welding the jointed boards 3 by adopting a deep melting arc to form a welding plate, and forming an I-shaped welding seam at the gap A;

s6, removing the arc striking and extinguishing plate 2 and the gasket (not shown in the figure) from the welding plate.

Through adopting the deep arc technique to weld makeup 3, make panel 1 set up I type groove, need not to set up the groove promptly, realized single face welding double-sided shaping, improved welding efficiency. In addition, the workload of forming the groove by machining is avoided from being increased, the construction efficiency is further improved, a filling structure is avoided from being formed at the groove, the filling amount of welding materials is reduced, the using amount of the welding materials is reduced, and the cost is reduced. The welding method is suitable for welding the medium plates in various welding fields such as ships, steel structures and the like, and can reduce machining quantity and welding filling quantity and improve construction efficiency. Limiting is performed on the jointed board 3 through the tooling jig 4, deformation is prevented in the welding process, namely welding deformation of the jointed board 3 is effectively controlled, lifting and turning over in the welding process are not needed, workload is reduced, construction efficiency is further improved, and welding quality is guaranteed.

The high-strength steel is a steel material with higher strength than the common steel, and has higher tensile strength, yield strength and elongation under specific conditions. The ultra-high strength steel is a further development of high strength steel, and the tensile strength and the yield strength are higher. The tensile strength of the high-strength steel is generally more than 400MPa, and the prior art is specifically referred to, and details are not repeated.

Optionally, the sheet 1 is machined to provide the sheet 1 with an I-groove. In some possible embodiments, before the two plates 1 are butted to form the panel 3 and the gap a is formed at the butt joint of the two plates 1, the method further comprises:

s11, cleaning an oxide layer on the butt joint surface of the plate 1 in a mechanical polishing mode;

s12, cleaning impurities which are in the range of 20mm-30mm away from the butt joint surface of the plate 1, wherein the impurities can be rust, water, greasy dirt and the like, so that the welding is convenient. The sequence of step S11 and step S12 is not limited.

In some possible embodiments, as shown in fig. 4, the welding plate is formed by welding the panels 3 using a deep-melting arc, and when the slit a forms an I-type weld, the welding is performed from the middle to both sides of the slit a when the length of the slit a is greater than 5m, so as to reduce welding deformation.

In some possible embodiments, the medium thickness sheet 1 has a thickness of 3mm to 15mm.

In some possible embodiments, the gap A spacing is 0-1mm, avoiding too large gap A spacing, reducing the solder fill, and avoiding too small gap A spacing, resulting in poor solder reliability.

Illustratively, the sheet 1 thickness and gap distance correspond as follows, with a gap distance of 0 when the sheet 1 thickness is 3mm-5 mm; when the thickness of the plate 1 is 5mm-8mm, the gap distance is 0.2mm-0.3mm; when the thickness of the plate 1 is 8mm-10mm, the gap distance is 0.3mm-0.5mm; when the thickness of the plate 1 is 10mm-12mm, the gap distance is 0.5mm-0.8mm; when the thickness of the plate 1 is 13mm-15mm, the gap distance is 0.8mm-1mm, and the corresponding relation of the numerical values is only used for reference and is not limited.

In some possible embodiments, when welding panel 3 using a deep-drawn arc to form a welded plate, JM-56 wire, having a diameter of 1.6mm, a welding current of 650A-670A, a welding voltage of 30V-36V, and a welding speed of 50cm/min-70cm/min, is used to form an I-type weld at gap A.

For example, when the plates 1 made of the AH36 material with the thickness of 5mm are welded, the plates 1 are machined in a machining mode, no groove is formed, namely an I-shaped groove, the gap A distance between the two plates 1 is 0, an oxidation layer of a butt joint surface is cleaned in a mechanical polishing mode, and meanwhile impurities such as rust, moisture, oil stains and the like in the range of 20mm-30mm around the butt joint surface are cleaned. The back is pasted with the pad of ceramic material, and ceramic material heat-proof quality is good, avoids scalding panel 1 bottom plate structure in the welding process. The welding parameters are as follows: the welding method adopts a D-Arc deep Arc welding technology, adopts a JM-56 welding wire, has a diameter of 1.6mm, a welding current of 650A, a welding voltage of 36V and a welding speed of 50cm/min.

As shown in fig. 3 and 5, in some possible embodiments, the tooling fixture 4 includes a first fixture 41 and a second fixture 42, where the first fixture 41 is used to limit the periphery of the jointed board 3, prevent the jointed board 3 from being displaced in the peripheral direction in the welding process, and the second fixture 42 is crimped to one of the boards 1, prevent the board 1 from being deformed due to stress in the welding process, and the other board 1 does not need to be crimped, so that the stress is released to a certain extent, and the problems that the two boards 1 are crimped and the stress cannot be released, and deformation occurs at the welding seam in the later use process are avoided.

In some possible embodiments, the first fixture 41 includes a plurality of clamping bars 411, the plurality of clamping bars 411 are enclosed around the jointed board 3, the clamping bars 411 include a cross plate 4111 and a vertical plate 4112 which are connected with each other, the cross plate 4111 is perpendicular to the vertical plate 4112, one end of the vertical plate 4112 is connected to the bottom of the cross plate 4111, the other end of the vertical plate 4112 is connected to an external structure, the cross plate 4111 is pressed against the front surface of the board 1, the vertical plate 4112 realizes the limit of the jointed board 3 around, the cross plate 4111 realizes the upward deformation of the jointed board 3 along the peripheral direction, specifically, the jointed board 3 is welded on a supporting surface such as an iron plate, the vertical plate 4112 is welded with the iron plate, so that the clamping bars 411 are stably installed, and the reliability of limiting the jointed board 3 is improved. After welding the jointed board 3, the clamping code 411 is detached.

In some possible embodiments, the second jig 42 includes a plurality of iron blocks 421, and the plurality of iron blocks 421 are pressed on the front surface of the board 1 at intervals, which has a simple structure, is convenient to use, and selects the number of the iron blocks 421 according to actual requirements, so that the iron blocks 421 are convenient to be removed.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A method of welding a high strength steel sheet, comprising:

taking two plates (1), wherein the plates (1) are provided with I-shaped grooves;

butting two plates (1) to form a jointed board (3), and forming a gap (A) at the butting position of the two plates (1);

installing arc striking and extinguishing plates (2) at the initial section and the tail end of the gap (A), and arranging a liner on the back surface of the gap (A) of the jointed board (3);

limiting the jointed board (3) by using a tooling fixture (4);

welding the jointed boards (3) by adopting a deep melting arc to form a welding plate, and forming an I-shaped welding seam in the gap (A);

-removing the arc striking plate (2) and the pad from the welding plate.

2. The welding method of the high-strength steel plate according to claim 1, wherein the tooling jig (4) comprises a first jig (41) and a second jig (42), the first jig (41) is used for limiting the periphery of the jointed board (3), and the second jig (42) is in pressure connection with one of the boards (1).

3. The welding method of the high-strength steel plate according to claim 2, wherein the first jig (41) comprises a plurality of clamping codes (411), the plurality of clamping codes (411) are arranged around the jointed board (3) in a surrounding mode, the clamping codes (411) comprise transverse plates (4111) and vertical plates (4112) which are connected with each other, the transverse plates (4111) are perpendicular to the vertical plates (4112), one end of each vertical plate (4112) is connected to the bottom of each transverse plate (4111), and the other end of each vertical plate (4112) is connected to an external structure, so that the transverse plates (4111) are pressed against the front face of the board (1).

4. The welding method of the high-strength steel plate according to claim 2, wherein the second jig (42) comprises a plurality of iron blocks (421), and the plurality of iron blocks (421) are pressed on the front surface of the plate (1) at intervals.

5. The welding method of a high-strength steel sheet according to claim 1, characterized by further comprising, before the butt joint of two of the plates (1) to form the panel (3) and the butt joint of the two plates (1) to form the gap (a):

cleaning an oxide layer of the butt joint surface of the plate (1) in a mechanical polishing mode;

and cleaning impurities within a range of 20mm-30mm away from the butt joint surface of the plate (1).

6. The welding method of high-strength steel plates according to claim 1, wherein the welding plate is formed by welding the jointed plates (3) by using a deep-melting arc, and when the slit (a) forms an I-shaped weld, the slit (a) is welded from the middle to both sides when the length of the slit (a) is greater than 5 m.

7. The welding method of high-strength steel plates according to claim 1, wherein when welding the jointed plates (3) by using a deep-melting arc to form a welded plate, when forming an I-type weld joint in the gap (a), a JM-56 welding wire having a diameter of 1.6mm, a welding current of 650A-670A, a welding voltage of 30V-36V, and a welding speed of 50cm/min-70cm/min is used.

8. The welding method of high-strength steel plates according to claim 1, wherein the gap (a) is spaced 0-1mm apart.

9. Method for welding high strength steel plates according to any one of claims 1-8, characterized in that the thickness of the plate (1) is 3-15 mm.

10. A ship comprising a welded plate formed by the welding method of a high-strength steel plate according to any one of claims 1 to 9.