JPH0419290A - Assembly method for shit hull structure - Google Patents

Abstract

PURPOSE:To reduce a weld amount as far as possible through simple assembly of a transverse frame member and a longitudinal member and to facilitate formation of a device for assembling by rebending a bent part of a transverse frame member to close an opening part for fitting, and bringing the bent part into contact with a longitudinal member to weld a cross part. CONSTITUTION:A slit 8 conforming to the sectional shape of a longitudinal member 3 is formed in a transverse frame 1, and a bent part 1a formed in a slit 8 part is bent at right angles to ensure an opening part 11 for fitting of the longitudinal member 3. Thus, there is no structural limitation to assembly of the longitudinal member 3 and an outside shell 5, and thus formation of a device is practicable. By rebending of the bent part 1a after the feed of the transverse frame 1, a state similar to a state in which the transverse frame 1 is inserted from the end of the longitudinal member 3 is produced, a gap at a cross part is almost eliminated to produce no cut in a weld part. Thereby, there is no need to effect lap weld or boxing weld, and automatic welding by means of a weld robot is practicable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for assembling a ship hull structure, and in particular to a method for assembling transverse ribs and stringers arranged in an intersecting manner.

[Prior Art] There are two typical conventional construction methods for assembling the transverse ribs and longitudinal members that make up the hull structure: (1) slot and collar plate type, and (2) slit type.

As shown in Fig. 4, in the construction method (2) above, a slot 4 corresponding to the width of the face portion 3a of the stringer 3 is provided in advance at the position of the opening 2 provided in the horizontal rib 1. , the transverse rib members 1 are arranged so as to intersect with the longitudinal members 3 using the slots 4 from above the longitudinal members fixed on the outer panel 5, and the transverse rib members 1 and the longitudinal members After positioning the material 3, a collar plate 6 is passed between the transverse rib material 1 and the inside of the web portion 3b of the stringer material 3 so as to close the slot 4.
Wrap welding or circular welding is performed at the positions indicated by arrows, and is used in many places, including curved parts. In addition, in the construction method (2) above, as shown in Fig. 5, a slit 7 corresponding to the thickness of the wear portion 3b of the longitudinal member 3 is provided in advance at the position of the opening 2 provided in the horizontal rib member 1. After opening and positioning the horizontal rib members 1 by inserting them from the ends of the longitudinal members 3 using the slits 6, welding or rotary welding is performed at the positions indicated by the arrows, mainly for planar structural parts. It is used in

[Problem to be solved by the invention] However, in the case of method (■) above, the color plate 6
, the number of parts increases, and it is difficult to install the collar plate 6 as well as to automate the installation of the transverse ribs 1 and the stringers 3. In particular, it is difficult to prevent the stringers 3 from falling. There is a growing problem that people have to rely on people, and
Welding of the color plate increases the amount of welding as a whole. As for the method of assembling the transverse rib members and longitudinal members, it is currently desirable to have a structure that does not increase the amount of welding as much as possible, and from this point of view, it is difficult to determine whether the insertion method using the slit type method described in ■ is the mainstream or the method described above. In the case of method (2), since the longitudinal members 3 are installed by inserting them into the slits 7 of the horizontal rib members 1, there are structural and accuracy limitations in assembling the stringers 3 and the outer panel 5. There are many problems in that it is difficult to implement equipment, and it is difficult to apply it to curved parts.Furthermore, in the case of any of the above methods, stress is concentrated at the intersection with the two openings. This often results in quality problems such as cracking, and the problem is that most of the work, such as winding and circular welding, must be done by humans.

Therefore, the present invention makes it possible to easily assemble the transverse rib members and the longitudinal members, reduces the amount of welding as much as possible, and eliminates structural restrictions on the assembly of the longitudinal members and the outer panel. The purpose of the present invention is to provide a method for assembling a hull structure that is easy to implement and can be applied not only to flat parts but also to curved parts.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention forms slits in the transverse rib members in correspondence with the cross-sectional shape of the stringer members, and also inserts the longitudinal members in the slit portions. A bending part is formed so that it can be bent freely, and the horizontal rib material is bent vertically with the bending part being bent laterally to form an opening for insertion. The threading material is supplied from above and arranged to cross the stringer, and then the bent portion of the transverse rib is bent back and the insertion opening is closed, and the bent portion is inserted into the stringer. A method for assembling a hull structure is characterized in that the transverse rib members and the longitudinal members are brought into contact with each other, and then the intersections of the transverse rib members and the longitudinal members are welded.

[Function] By bending the bent portion of the horizontal rib material to the side, an opening for fitting into the stringer member is secured, so by supplying the horizontal rib material from above the stringer member. After assembly, when the bent part is restored, the fitting opening is closed, so it is similar to inserting the transverse rib material into the longitudinal member from the end using a slit. By welding the intersections, the horizontal ribs and longitudinal members can be brought into close contact without using other members. I can do it.

[Implementation example J Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 (A), (B), (C) 0, and (E) show the working procedure of the method of the present invention, and Figure 2 shows the configuration of the transverse rib material in which the assembling method of the present invention is carried out. . First, as shown in FIG. 1) and FIG. 2, a slit 8 corresponding to the cross-sectional shape of the stringer 3 is provided at a position where the transverse rib 1 intersects with the stringer 3. At this time, the present invention assumes a higher level of cross-sectional shape accuracy of the stringer 3 in conventional construction methods, and in order to completely avoid a structure suitable for welding robots, that is, a structure that relies on manual welding, A slit 8 is provided in a single stroke method starting from the end of the horizontal rib material 1 and continuing to the end. In addition, at the end of this slit 8, as shown in FIG. 2, in order to improve the quality of welding in the subsequent process,
A stop hole 9 is provided. In this way, it is desirable that the transverse rib member 1 provided with the slit 8 corresponding to the cross-sectional shape of the stringer member 3 be inserted into the stringer member 3 as is, but due to structural and accuracy constraints, In the present invention, the stringer 3 is supplied from above. For this purpose, as shown in Fig. 1 and Fig. 2, on one side of the horizontal rib member 1,
The direction from the stop hole 9 toward the end of the horizontal rib material 1 is inclined so that it is parallel to the slit 8 or widens toward the end,
A bending groove 10 is provided by mechanical cutting, and a bent portion 1a is formed between the slit 8 and the bending groove 10. The bending groove 10 allows easy bending of the bent portion 1a, easy re-bending when restoring after opening the bent portion 1a, and also minimizes the amount of repair by welding after restoration. Cutting 1 (depth) that reduces
Select S'', so that there are 3 longitudinal members and 1 transverse member.
When feeding from above, the bent portion 1a is bent at right angles to the side with the bending groove 10 as a base line, as shown in FIG.
form 1.

The bending groove 10 is arranged so that the bending groove 10 can be fitted into the opening 11 or the stringer 3 even if the stringer 3 is inclined.
As shown in Fig. 2, the bending part 1 is
It is desirable to make the width of a wide, and
The cutting depth of the groove 10 may be selected so that the bending process of the bent part 1a can be easily performed as described above, and the amount of welding repair at the time of restoration is as small as possible, or as shown in FIG. 3. Normally, the remaining cutting thickness t cannot be penetrated during welding.5
It is desirable to set it to ~6#. In addition, the bending section 1
The bending process a can be easily performed with a small force, and in order to reduce the residual stress after bending and prevent the occurrence of cracks, heat is applied to the groove 10 part using, for example, a high-frequency heating device. Try to do it in a state. Next, the horizontal rib member 1 with the fitting opening 11 formed therein as described above is supplied from above, and as shown in FIG. The material 3 is fitted from above using the fitting opening 11 so as to intersect with each other, and then, after positioning in the longitudinal direction, it is inserted at right angles as shown in FIG. 1(E). The bent portion 1a of the horizontal rib member 1 that has been bent open is bent back and restored, the fitting opening 11 is closed, and the bent portion 1a is inserted into the web portion 3b or face portion 3a of the longitudinal member 3. Furthermore, it is brought into close contact with the outer panel 5 and restrained. In this state, the intersections of the transverse rib members 1 and longitudinal members 3 are welded, and at the same time, the bending grooves 10 are backfilled by welding.

In this case, when the bent portion 1a is bent back and restored,
Insert the longitudinal members 3 into the slits 8 originally formed in the transverse ribs 1.
Since the position is restrained when inserted, there is no need to bring in another part for restoration, and welding allows for complete contact between the two, making it possible to improve the texture. , it is possible to stabilize the quality of the intersection, which is the part with the highest stress. Note that the necessary openings in the horizontal rib material 1 are separately drilled in a shape such as a circle or an ellipse at a position other than the above-mentioned intersection.

As described above, in the present invention, the slit 8 corresponding to the cross-sectional shape of the longitudinal member 3 is provided in the horizontal rib member 1, and the bent portion 1a formed at the slit 8 is bent at a right angle to form the longitudinal member. Since the opening 11 for fitting into the member 3 can be secured, the assembly of the longitudinal member 3 and the outer panel 5 is not subject to any structural restrictions, and therefore it is possible to create a device. Also, by bending back the bent portion 1a after supplying the transverse ribs, it is possible to create the same condition as if the transverse ribs 1 were inserted from the ends of the longitudinal members 3, and the gap at the intersection Since it is possible to almost eliminate the occurrence of welding points (cuts), there is no need for winding welding or round welding, and automatic welding by a welding robot becomes possible.

In addition, in the above embodiment, the assembly of a flat part was shown, but it was also shown that it could be adopted for a curved part. Also, although it is not a ship's structure, it is optional to apply it to similar structural parts such as bridges, and various changes can be made without departing from the gist of the thin ice invention. Of course.

[Effects of the Invention] As described above, according to the method for assembling a hull structure of the present invention, the bent portions formed in the slit portions of the transverse ribs are bent laterally to fit into the longitudinal members. In this state, the transverse rib members are inserted into the stringer members from above, and then the bent parts are restored to restrain the stringer members and the longitudinal members are Since the running material and the horizontal rib material are welded in close contact with each other over the entire circumference, the following excellent effects are exhibited.

(1) The horizontal ribs can be supplied from above and assembled to the stringers, making it very easy to assemble, and furthermore, the intersections between the stringers and the horizontal ribs can be welded all around. As a result, welding at intersections can be performed automatically, eliminating the need for manual winding and round welding.

(11) After fitting the transverse ribs to the stringers and positioning them in the longitudinal direction, the bent parts of the transverse ribs are bent back so that the transverse ribs are in close contact with the stringers. This allows for reliable positioning.

(iii) It can be applied not only to flat parts but also to curved parts.

Provisional) By adopting the method of the present invention, openings such as slots at intersections, which were conventionally difficult to assemble, can be eliminated, and stress concentration can be avoided, and welding can also be performed by winding welding. This will eliminate areas where it is difficult to apply iso-ro-hot, making it easier to automate.

(V) Furthermore, if a groove is provided in the bent part for the bent part of the horizontal rib material, the bending work and unbending work of the bent part can be easily performed, and During bending work and unbending work of the bending part,
If the bent portion is heated, the bending process can be performed more easily and it is advantageous in terms of quality (welding and structure).

[Brief explanation of the drawing]

Figures 1) to (D are schematic diagrams of working tools showing an embodiment of the method of assembling a hull structure of the present invention, and Figure 2 shows the configuration of transverse ribs for carrying out the method of assembling a ship structure of the present invention. Figure 1 is an enlarged view of part ■ in Figure 1, Figure 3 is an enlarged view of the ■-■ arrow in Figure 2,
FIG. 4 and FIG. 5 are both schematic diagrams showing the conventional construction method. DESCRIPTION OF SYMBOLS 1... Horizontal rib material, 1a... Bending part, 3... Longitudinal member, 5... Outer plate, 8... Slit, 10... Groove for bending, 11... Opening for fitting.

Claims (1)

[Claims] (1) Form a slit in the transverse rib material in accordance with the cross-sectional shape of the stringer member, and bend the bent portion so that an opening for fitting into the stringer member is formed in the slit portion. The transverse rib material is fed from above the stringer with the bent portion bent sideways to form a fitting opening, and is arranged to intersect with the stringer. Next, the bent portion of the horizontal rib material is bent back and the fitting opening is closed to bring the bent portion into contact with the stringer, and then the cross rib material and the stringer intersect. A method of assembling a hull structure characterized by welding parts.