JPH0615445A - Method for machining shell structure in structural material - Google Patents

Abstract

PURPOSE:To provide the method for machining a shell structure in a structural material having good precision of scramble part and small number of the parts and capable of reducing the time of gathering and turn-over, etc., for carrying members, at the time of machining plural shell structural members having direct scramble part from one sheet of a steel plate. CONSTITUTION:On one steel plate 1 is marked at the position adjacent to the position 4 to be directly scrambled. While remaining a part of the position to be directly scrambled along the marking, the large part thereof is cut off. The members obtd. from the other steel plate 1 are welded to the prescribed positions on the one steel plate to execute the sub-assembly. Thereafter, the sub-assembled steel plate is turned over and the strain removal treatment is executed. The remainder cutting part in one steel plate is cut off.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, among hull structural members, a joint or the like having a direct connecting portion has a block upper part 9 and a block lower part 10 as shown in FIG. It is common practice to manufacture them separately, and then directly join the upper and lower shell structural members directly at the joining portion 4 to integrate them.

In the conventional construction method for hull structural members of this type, members having direct joints in a single steel plate are individually cut and cut off, and then sub-assembled. That is, as shown in FIG. 3, marking is performed on a single steel plate 11 at positions to be the individual hull structural members 12 and 13 as shown by e, and as shown by f, an intermediate cutting line 1 is formed.
4 and cut into individual hull structural members 12 and 13, and then, as indicated by g, a member 15 obtained from another steel plate is attached to the member 12 and the member 16
Was attached to the member 13 to carry out a sub-assembly, and the sub-assembled individual members 12 and 13 were inverted and strain-relieved as shown by h before being sent to the next step.

[0004]

However, in the conventional technique shown in FIG.
Of the individual members 12,
13 is separated, the number of members increases, it takes a lot of time to collect and distribute the members, and the amount of deformation at the time of cutting the members is large, the number of small members increases, and the number of small assembling increases. Places, plans, arrangements, and tidying become complicated. Moreover,
Since the joints are directly cut and assembled separately, the precision of the joints is poor, and because individual strains are removed, the number of inversions is large, the number of parts during transportation is large, and it takes a lot of time. was there.

The present invention is intended to solve the above problems. That is, according to the present invention, the parts to be joined are directly adjacent to each other from the gathering of the members, the number of parts from cutting to assembling, the strain removing process is small, the time for consolidating and reversing the carrying members is reduced, and the deformation of the members It is an object of the present invention to provide a method for manufacturing a shell structure in a structure, which has a small amount and can obtain a highly accurate 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 a method of manufacturing a plurality of shell structure members having direct connection from a single steel plate. , A step of marking on the one steel plate the positions where the direct connection is made adjacent to each other, and a step of cutting a large part of the part of the direct connection left along the marking A step of welding a member gathered from another steel plate at a predetermined position of the one steel plate to perform a small assembly, and a step of reversing the small assembled steel plate to perform strain relief; The step of cutting and cutting off the uncut portion of each of the steel plates is performed.

[0007]

According to the present invention, one steel plate is marked at a position to be directly joined at a position adjacent thereto, and when a part to be directly joined is cut along the marking, a part thereof is cut. The uncut portion is made, the steel sheet is left as it is, and then the small assembly is performed. Then, the steel sheet is inverted and strained, and then the uncut portion is cut to be divided into a plurality of assembly parts.

[0008]

1 shows an embodiment of the present invention. That is, on a single steel plate 1, as shown by a, the portions that will be the direct joint portions 4 of the hull structural members 2 and 3 are marked adjacent to each other, and along the markings, the direct joint portions 4 and The uncut portions 6 are formed at both ends and a few places near the central portion, and most of them are cut (cut line 5).

After that, as shown by b, the members 7 and 8 taken from other steel plates are attached to the members 2 and 3 at the attachment positions and the attachment angles, respectively, and welded to perform a small assembly. This small-assembled steel plate is inverted as shown by c to remove strain. After removing the strain, the separating portion 6 is cut into individual hull structural members 2 and 3 as indicated by d, and these are sent to the next step.

As described above, the uncut portion 6 is partially formed with the size of the steel plate 1, and the process is performed with the size of the steel plate 1 from the cutting of the member to the sub-assembly and strain relief. Particularly, as shown in FIG.
By setting it at several places near both ends and the central part, the rigidity of the steel plate 1 does not become so weak even if the cutting line 5 is considerably long, and the workability at the time of small assembly or reversal is good, and the final In the cutting step, the cutting section 6 only has to be cut, so that the cutting can be easily performed in a short time.

[0011]

As described above, according to the shell structure machining method of the present invention, in a method for directly manufacturing a plurality of shell structure members having a single joint from a single steel plate, the single steel plate is used. , A step of marking the points to be directly joined at positions adjacent to each other, a step of cutting out most of the points to be directly joined along the marking and cutting most of them, A step of welding the formed member to a predetermined position of the one steel plate to carry out a small assembly, and thereafter, a step of reversing the slightly assembled steel plate to remove the strain, and leaving the one steel plate uncut. Since it consists of cutting and separating the part,
Has the following effects.

First, since the joints such as joints are directly adjacent to each other for cutting and assembling, the mounting position and the mounting angle of the joints are matched with each other, so that a highly accurate small assembly part is manufactured. it can. Secondly, most of the part that directly becomes the joint is cut, but part of it is left uncut, so the amount of deformation due to cutting of individual members is small, and multiple members are included in a single steel plate. Yes, parts management is easy. Also, the movement and transportation of the members are easy because of the single steel plate.

Third, a plurality of subassemblies can be carried out on a single steel plate, the material can be collected and delivered easily, and the setting of the assembling place can be easily managed. Fourthly, when the reverse strain relief is performed after the subassemblies, The number of times of reversal is small because one steel plate of the material is reversed without reversing each individual subassembly. Fifth, since a single material steel plate is used to perform a plurality of sub-assembly parts up to the most cutting, sub-assembling, reversing, and strain-removing processes, the parts are highly accurate and the processing time is the same as the conventional method. Remarkably less than.

[Brief description of 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 coupling portion.

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

[Explanation of symbols]

 1 Steel plate 2, 3 Hull structural member 4 Direct joining part 5 Cutting line 6 Uncut part 7, 8 member

Claims (3)

[Claims] 1. A method of manufacturing a plurality of shell structural members having a direct connection from a single steel plate, wherein the single steel plate comprises:
The step of marking the points to be directly joined to the adjacent positions, the step of cutting out most of the points to be directly joined along the marking, and cutting most of the points, and collecting from other steel plates A step of welding a member at a predetermined position of the one steel plate and subassembling, and thereafter, a step of reversing the steel plate that has been subassembled to perform strain relief, and a portion of the one steel plate left uncut A method for machining a shell structure in a structure, which comprises a step of cutting and separating. 2. The method for manufacturing a shell structure in a structure according to claim 1, wherein the structure is a ship and the shell structure member is a ship structure member. 3. The uncut portion in the step of cutting most of the cut line is at both edges of the cutting line and at several places near the center.
Alternatively, the method for manufacturing the shell structure in the structure according to the item 2.