JP3166134B2 - How to make shell structures in structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for machining a hull structure in a structure, and more particularly to a method for machining a hull structure in a ship.

[0002]

2. Description of the Related Art Conventionally, among hull structural members, a joint or the like having a direct connection portion, for example, when manufacturing a hull block, as shown in FIG. It is common to manufacture them separately, and then directly connect the upper and lower shell structural members at the direct connection portion 4 to integrate them.

[0003] In this type of conventional hull structural member mounting method, members having a direct connection on a single steel plate are individually cut and separated, and then small assembly is performed. That is, as shown in FIG. 3, a single steel plate 11 is marked on each of the hull structural members 12 and 13 at a position where the hull structural members 12 and 13 are formed, and as shown by f, an intermediate cutting line 1 is formed.
4 and cut into individual hull structural members 12 and 13, and thereafter, as shown by g, a member 15 collected from another steel plate is
Was attached to the member 13 to perform subassembly, and the subassembled individual members 12, 13 were turned over to remove the distortion as shown by h, and then flowed to the next step.

[0004]

However, in the prior art shown in FIG. 3, one steel plate 11 is
Of the individual members 12,
13 is separated, the number of members increases, it takes a lot of time to collect and distribute members, and the deformation amount at the time of cutting members is large, the number of small members increases, and the number of small assemblies increases, Places, planning, organizing, tidying, etc. become complicated. Moreover,
The direct joints are cut and assembled separately, resulting in poor joint accuracy, and the individual distorting, resulting in a large number of reversals, a large number of parts during transportation, and a long time. was there.

[0005] The present invention is to solve the above problems. That is, according to the present invention, the locations of direct joining from member gathering are adjacent to each other, the number of parts from cutting to assembly and distortion removal process is small, the time for consolidating and reversing transport members is reduced, and deformation of members is reduced. It is an object of the present invention to provide a method of machining a shell structure in a structure having a small amount and capable of obtaining a high-precision member.

[0006]

In order to achieve the above object, a method of manufacturing a shell structure in a structure according to the present invention is directed to a method of manufacturing a plurality of shell structural members directly connected from a single steel plate. A step of marking, on the one steel sheet, a position where the portion to be directly joined is adjacent to the steel plate, and a step of cutting most of the portion to be directly joined along with the marking while leaving a part of the portion to be joined directly Welding a member gathered from another steel sheet to a predetermined position of the one steel sheet to perform a small assembly, and thereafter, inverting the small assembled steel sheet to remove a strain, And cutting off the uncut portions of the steel sheets.

[0007]

According to the present invention, a part to be directly joined is marked on a single steel plate at a position adjacent to the steel sheet, and when the part to be directly joined is cut along the marking, a part is directly cut. An uncut portion is formed, and a small steel plate is assembled as it is, then inverted, straightened, and then the uncut portion is cut and divided into a plurality of assembled parts.

[0008]

FIG. 1 shows an embodiment of the present invention. That is, as shown by a, a portion to be the direct connection portion 4 of the hull structural members 2 and 3 is adjacently marked on one steel plate 1 as shown by a, and the direct connection portion 4 is marked along the marking. An uncut portion 6 is formed at both ends and several portions near the center of the portion, and most of the portion is cut (cut line 5).

[0009] Thereafter, as shown by b, the members 7, 8 taken from other steel plates are attached to the members 2, 3 at the same attachment position and attachment angle, and welded to perform small assembly. The small assembled steel plate is inverted as shown by c to remove the distortion. After the strain is removed, the cutoff section 6 is cut to form individual hull structural members 2 and 3 as shown by d, and these are flowed to the next step.

As described above, the uncut portion 6 is formed in a part of the size of the steel sheet 1, and processing is performed with the size of the steel sheet 1 from cutting of members to small assembly and strain relief. In particular, as shown in FIG.
By setting it at several locations near both ends and the center, the rigidity of the steel plate 1 is not so reduced even if the cutting line 5 is considerably long, so that the workability in small assembly or inversion is good, and the final In the separation step, it is only necessary to cut the separation part 6, so that the cutting can be easily performed in a short time.

[0011]

As described above, according to the method for manufacturing a shell structure of the present invention, in a method of manufacturing a plurality of shell structural members directly connected from a single steel plate, the method for manufacturing a single steel plate includes A step of marking the location where the direct connection is made adjacent, a step of cutting and leaving a part of the location directly connected along the marking, and a report from another steel plate. Welding the assembled member to a predetermined position of the one steel plate and subassembly, and thereafter, inverting the small assembled steel plate to remove the strain, and leaving the one steel plate uncut. It consists of a process of cutting and separating the part,
The following effects are exhibited.

First, since cutting and assembling are performed with the direct fitting portions such as joints adjacent to each other, the fitting position and the mounting angle of the fitting portions are assembled so that high precision small assembly parts are manufactured. it can. Secondly, most of the parts to be directly joined are cut, but a part is left uncut, so that the amount of deformation due to cutting of individual members is small, and a plurality of members can be cut into one steel plate. Yes, member management is easy. In addition, the movement and transportation of the members are easy because of the single steel plate.

Third, a plurality of small assemblies can be formed on a single steel sheet, collection and delivery can be easily performed, and setting of an assembly place can be easily managed. The number of reversals is small because one steel sheet of the material is reversed without reversing individual subassemblies. Fifth, since a single steel sheet is used to perform a large number of subassembly processes, including cutting, subassembly, reversal, and straightening processes, the accuracy of the components is good and the processing time is the same as the conventional method. Markedly less than.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a hull structural member having a direct connection portion.

FIG. 3 is a perspective view showing an example of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel plate 2, 3 Hull structural member 4 Direct connection part 5 Cutting line 6 Uncut part 7, 8 Member

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23K 9/00 B23K 31/00 B63B 9/06

Claims (3)

(57) [Claims] 1. A method of manufacturing a plurality of shell structural members directly joined from a single steel sheet, the method comprising:
The step of marking the place to be directly joined at a position adjacent to the step, the step of cutting and leaving a part of the place to be directly joined along the marking and cutting the majority, and collected from other steel plates A step of welding the member to a predetermined position of the one steel sheet and sub-assembling, and thereafter, a step of reversing the small-assembled steel sheet and removing the strain, and a part of the one steel sheet left uncut And a step of cutting off the shell. 2. The method according to claim 1, wherein the structure is a ship, and the shell structural member is a hull structural member. 3. The uncut portion in the step of cutting the most part is located at both edges and several places near the center of the cutting line.
Or a method for machining a shell structure in the structure according to 2.