CN109014775B - Method for butting outboard plates on two sides of fore-and-aft column of ship - Google Patents
Method for butting outboard plates on two sides of fore-and-aft column of ship Download PDFInfo
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- CN109014775B CN109014775B CN201810795334.0A CN201810795334A CN109014775B CN 109014775 B CN109014775 B CN 109014775B CN 201810795334 A CN201810795334 A CN 201810795334A CN 109014775 B CN109014775 B CN 109014775B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method for butting outboard plates on two sides of a fore-and-aft column of a ship, which specifically comprises the following steps: processing a bevel surface on the end parts of the first and second side planks respectively; polishing the bevel surfaces of the two outer plates to be smooth; welding a circular steel liner at the root edge of the bevel face of the first side shell plate; the second side outer plate and the first side outer plate are symmetrically arranged, and the bevel surfaces of the first side outer plate and the second side outer plate form a V-shaped symmetrical groove together; welding the groove by adopting a carbon dioxide multilayer multi-pass welding process; and polishing the welding line, and carrying out nondestructive inspection. The invention has simple construction and convenient operation, can realize the butt joint of the first and second side planks without embedding round steel between the two planks, improves the welding quality and the welding efficiency, and can meet the requirement of classification society on the welding strength.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a method for butting outboard plates on two sides of a ship fore-and-aft post.
Background
Usually, the outer plates at the stem and the stern have large linear change and cannot be manufactured by a complete steel plate, the outer plates at the stem and the stern are usually divided into a left outer plate and a right outer plate along the center line of a ship body to manufacture, a section of round steel is embedded between the two separated outer plates, and the two outer plates and the round steel are connected in an angle welding mode, as shown in figure 1.
Although this type of production can solve the problem of welding the outer plate, the round steel used is lack of certification of the classification society (the round steel is used in a small quantity, and the supplier is not willing to apply certification to classification society for this purpose), and is contrary to the regulations that the classification society certifies the steel used for the main hull required by the classification society's specifications, and the related welding process cannot be recognized by the classification society, so the connection mode using the round steel is illegal operation, and the welding quality cannot be guaranteed. In addition, the linear change at the fore-and-aft column is large, the diameter of the used round steel is also large, the difficulty of hot processing the round steel on site is large, preheating is needed before welding, heat preservation is needed after welding, and construction is troublesome.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and designs a method for butting outboard plates on two sides of a bow and stern post of a ship.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for butting outboard plates on two sides of a fore-and-aft column of a ship specifically comprises the following steps:
step 1: processing bevel surfaces of 20-40 degrees at the end parts of the first side outer plate and the second side outer plate respectively;
step 2: polishing the bevel surfaces of the first and second side planks smoothly, and removing burrs on the surfaces of the first and second side planks;
and step 3: fixing a first side board on a jig frame in an inclined manner, and keeping a set angle between the bottom edge of the first side board and the center line of the ship body;
and 4, step 4: welding and fixing a circular steel liner on the root edge of the bevel surface of the first side shell plate;
and 5: the second side outer plate and the first side outer plate are symmetrically arranged, the edge of the root part of the bevel surface of the second side outer plate is fixed on the round steel lining, and the bevel surface of the first side outer plate and the bevel surface of the second side outer plate jointly form a V-shaped symmetrical groove with a groove angle of 40-80 degrees;
step 6: adopting a carbon dioxide gas shielded semi-automatic welding machine to carry out backing welding, and filling gaps between the first and second side planks and the circular steel liner; then, welding the V-shaped symmetrical groove by adopting a carbon dioxide multilayer multi-pass welding process;
and 7: polishing the welding seam, wherein the outer end face of the welding seam is in a convex arc shape.
Preferably, step 7 is followed by step 8: and carrying out nondestructive flaw detection on the welding seam, and if the detection result does not meet the specified requirement, carrying out repair treatment.
Preferably, the step 3 of obliquely fixing the first side shell to the jig specifically includes the steps of:
firstly, a first side outer plate is hung at a target position of a jig frame through a crane; and then, positioning the first side outer plate according to the design size, and after the positioning is finished, fixing the first side outer plate on the jig frame in a spot welding manner by using a carbon dioxide gas shielded semi-automatic welding machine.
Preferably, the step 4 of welding and fixing the circular steel liner to the bottom edge of the bevel surface of the first side shell plate comprises the following specific steps:
firstly, placing a circular steel liner at the root edge of a bevel surface of a first shipboard outer plate, and aligning the center line of a round rod liner with the edge of the bevel surface; then, the first board-side outer plate and the circular steel liner are welded and fixed from the board-side direction by carbon dioxide semi-automatic fillet welding.
Preferably, when the bottom edge of the first side shell plate slop surface is a curved edge, the round steel liner is subjected to cold roll forming so that the shape of the round steel liner is matched with the shape of the edge of the first side shell plate slop surface.
Preferably, the circular steel liner has a diameter of 5mm to 11 mm. Preferably, the first side outer plate is a port outer plate, and the second side outer plate is a starboard outer plate; or the first side outer plate is a starboard outer plate, and the second side outer plate is a port outer plate.
Preferably, the angle between the bottom edge of the first side shell and the center line of the hull is determined according to the line type of the hull.
The invention has the following positive beneficial effects: the method for butting outboard plates on two sides of the fore-and-aft column of the ship is simple in construction and convenient to operate, grooves are formed in the end portions of the first outboard plate and the second outboard plate of the second outboard plate, then the two outboard plates are symmetrically placed, and welding and fixing are carried out through the circular steel liners arranged on the bottom edges of the groove surfaces of the first outboard plate and the second outboard plate (the circular steel liners belong to welding auxiliary materials, and the materials of the circular steel liners do not need to obtain certificate products of classification society), so that butting of the first outboard plate and the second outboard plate is realized, approval of classification society is obtained, round steel does not need to be embedded between the two outboard plates, the problems that the traditional butting method is high in operation difficulty, troublesome in construction and incapable of ensuring welding quality are solved, welding quality and welding efficiency are improved, and welding strength can meet the requirements of the classification society standard.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a state of docking in the prior art.
FIG. 2 is a schematic view of the docking state using the method of the present invention.
The specific meanings of the reference numbers in the figures are: the marine ship comprises a ship body, a first side plank 1, a second side plank 2, a circular steel liner 3, a bevel face root gap between the first side plank and the second side plank 4, a groove angle of a V-shaped symmetrical groove 5, a ship body center line 6 and round steel 7.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The embodiment is described by combining figure 1, the method for butting the outboard plates on two sides of the fore-and-aft post of the ship comprises the steps of forming grooves at the end parts of the first outboard plate and the second outboard plate of the second outboard plate, symmetrically placing the two outboard plates, and welding and fixing the two outboard plates through the circular steel liners arranged at the bottom edges of the groove surfaces of the first outboard plate and the second outboard plate, so that the butting of the first outboard plate and the second outboard plate is realized, the approval of a classification society is obtained, round steel does not need to be embedded between the two outboard plates, the problems of high operation difficulty, troublesome construction and incapability of ensuring the welding quality in the traditional butting method are solved, the welding quality and the welding efficiency are improved, and the welding strength can meet the specification requirements of the classification society.
The first side outer plate can be a port outer plate, and the second side outer plate can be a starboard outer plate; or the first side outer plate is a starboard outer plate, and the second side outer plate is a port outer plate. In the present embodiment, the specific steps of the method for butting the outboard plates at both sides of the fore-and-aft post of the ship according to the present invention will be specifically described by taking the first outboard plate as a port outboard plate and the second outboard plate as a starboard outboard plate as an example.
The invention relates to a method for butting outboard plates on two sides of a fore-and-aft column of a ship, which specifically comprises the following steps:
step 1: the end parts of the port outer plate 1 and the starboard outer plate 2 are respectively processed with 20-40 degrees of bevel surfaces, and in the embodiment, E-grade ship steel plates with the thickness of 43mm are adopted for the port outer plate 1 and the starboard outer plate 2.
Step 2: and (3) polishing the bevel surfaces of the port outer plate 1 and the starboard outer plate 2 smoothly, and removing burrs on the surfaces of the port outer plate and the starboard outer plate.
And step 3: the port side outer plate 1 is obliquely fixed on the jig frame, so that a certain angle is kept between the bottom edge of the port side outer plate and the central line 6 of the ship body, and the size of the angle is determined according to the line type of the ship body.
When fixing the port outer plate, firstly, the port outer plate 1 is hung at a target position of a jig frame through a crane; and then, positioning the port outer plate according to the designed size, and after the positioning is finished, fixing the port outer plate 1 on the jig frame in a spot welding manner by using a carbon dioxide gas shielded semi-automatic welding machine.
And 4, step 4: and welding and fixing a circular steel liner 3 with the diameter of 5mm-11mm on the root edge of the bevel surface of the port outer plate 1.
Specifically, firstly, observing the line type of the bottom edge of the bevel face of the port outer plate 1, if the bottom edge of the bevel face is a curved edge, performing cold bending forming on the circular steel liner 3 to enable the shape of the circular steel liner to be matched with the shape of the edge of the bevel face of the port outer plate 1, and then placing the circular steel liner 3 at the root edge of the bevel face to enable the center line of the circular steel liner 3 to be aligned with the edge of the bevel face; if the bottom edge of the bevel face is linear, the circular steel liner 3 is directly placed at the root edge of the bevel face. Then, the port side outer panel 1 and the circular steel liner 3 are welded and fixed from the inboard direction by carbon dioxide semi-automatic fillet welding. In this embodiment, the circular steel liner 3 is a 6mm diameter round bar of steel.
And 5: the starboard outer plate 2 and the port outer plate 1 are symmetrically arranged, the root edge of the bevel face of the starboard outer plate is fixed on the circular steel liner 3, the bevel face of the port outer plate 1 and the bevel face of the starboard outer plate 2 jointly form a V-shaped symmetrical groove, and the groove angle 5 of the V-shaped symmetrical groove is 40-80 degrees. Although the included angle formed by the outer plates on the two sides is relatively sharp, the welding strength of the outer plates meets the requirement of classification society regulations through related welding process evaluation experiments.
Step 6: adopting a carbon dioxide gas shielded semi-automatic welding machine to carry out backing welding, and filling gaps between the port outer plate 1 and the starboard outer plate 2 and the circular steel liner 3; and then, welding the V-shaped symmetrical groove by adopting a carbon dioxide multilayer multi-pass welding process.
And 7: polishing the welding seam, wherein the outer end face of the welding seam is in a convex arc shape.
And 8: and carrying out nondestructive flaw detection on the welding seam, and if the detection result does not meet the specified requirement, carrying out repair treatment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (5)
1. A method for butting outboard plates on two sides of a fore-and-aft column of a ship is characterized by comprising the following steps:
step 1: processing bevel surfaces of 20-40 degrees at the end parts of the first side outer plate and the second side outer plate respectively;
step 2: polishing the bevel surfaces of the first and second side planks smoothly, and removing burrs on the surfaces of the first and second side planks;
and step 3: fixing a first side board on a jig frame in an inclined manner, and keeping a set angle between the bottom edge of the first side board and the center line of the ship body;
and 4, step 4: welding and fixing a circular steel liner on the root edge of the bevel surface of the first side shell plate;
specifically, first, a circular steel liner is placed at the root edge of the bevel face of the first side shell plate, and the center line of the circular steel liner is aligned with the edge of the bevel face; then, welding and fixing the first shipboard outer plate and the round steel liner from the shipboard direction by adopting carbon dioxide semi-automatic fillet welding;
when the bottom edge of the first side shell plate slop surface is a curved edge, performing cold roll forming on the circular steel liner to enable the shape of the circular steel liner to be matched with the shape of the edge of the first side shell plate slop surface;
the diameter of the round steel liner is 5mm-11 mm;
and 5: the second side outer plate and the first side outer plate are symmetrically arranged, the edge of the root part of the bevel surface of the second side outer plate is fixed on the round steel lining, and the bevel surface of the first side outer plate and the bevel surface of the second side outer plate jointly form a V-shaped symmetrical groove with a groove angle of 40-80 degrees;
step 6: adopting a carbon dioxide gas shielded semi-automatic welding machine to carry out backing welding, and filling gaps between the first and second side planks and the circular steel liner; then, welding the V-shaped symmetrical groove by adopting a carbon dioxide multilayer multi-pass welding process;
and 7: polishing the welding seam, wherein the outer end face of the welding seam is in a convex arc shape.
2. The method for docking outboard panels on both sides of a fore-aft stem of a marine vessel as claimed in claim 1, further comprising step 8 after said step 7: and carrying out nondestructive flaw detection on the welding seam, and if the detection result does not meet the specified requirement, carrying out repair treatment.
3. The method for butting outboard plates on two sides of a fore-and-aft column of a ship according to claim 1, wherein the step 3 of obliquely fixing the first outboard plate on the jig frame comprises the following specific steps:
firstly, a first side outer plate is hung at a target position of a jig frame through a crane; and then, positioning the first side outer plate according to the design size, and after the positioning is finished, fixing the first side outer plate on the jig frame in a spot welding manner by using a carbon dioxide gas shielded semi-automatic welding machine.
4. The method of claim 1, wherein the angle between the bottom edge of the first outboard plate and the centerline of the hull is determined by the line of the hull.
5. The method of docking outboard plates on both sides of a fore-aft column of a marine vessel of claim 1, wherein said first outboard plate is a port outboard plate and said second outboard plate is a starboard outboard plate; or the first side outer plate is a starboard outer plate, and the second side outer plate is a port outer plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795334.0A CN109014775B (en) | 2018-07-19 | 2018-07-19 | Method for butting outboard plates on two sides of fore-and-aft column of ship |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810795334.0A CN109014775B (en) | 2018-07-19 | 2018-07-19 | Method for butting outboard plates on two sides of fore-and-aft column of ship |
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| CN109014775A CN109014775A (en) | 2018-12-18 |
| CN109014775B true CN109014775B (en) | 2021-06-01 |
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| CN114987678B (en) * | 2022-07-08 | 2023-12-15 | 上海外高桥造船有限公司 | Mutually embedded welding assembly and ship comprising same |
| CN115743462B (en) * | 2022-11-30 | 2024-06-11 | 中国船舶集团青岛北海造船有限公司 | Ship false rudder construction method |
| CN116352219B (en) * | 2023-05-04 | 2024-04-30 | 南通泰胜蓝岛海洋工程有限公司 | Water-drop type tower barrel assembly and water-drop type tower barrel construction method |
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| US5115963A (en) * | 1991-06-10 | 1992-05-26 | Mcdonnell Douglas Corporation | Superplastic forming of panel structures |
| JP5237355B2 (en) * | 2010-11-26 | 2013-07-17 | 三菱重工業株式会社 | Method for manufacturing panel structure |
| CN104801821B (en) * | 2014-07-23 | 2017-02-15 | 烟台中集来福士海洋工程有限公司 | Steel plate butt welding method |
| CN106862730A (en) * | 2017-03-30 | 2017-06-20 | 广船国际有限公司 | A kind of vertical butt welding method of slab |
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