JPS58954B2 - Welding method for reinforcing plates inside long objects with closed cross-section structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding method for welding a reinforcing plate to the inside of a long object having a closed cross-section, for example, a rectangular cross-section.

In the prior art (Japanese Patent Publication No. 45-20368), a welding groove is formed on one side of the reinforcing plate, and a hole communicating with the groove is bored in the side plate of a long object having a rectangular cross section. After the three sides of the curve and the side plates facing the three sides are directly connected, the remaining side plates are placed opposite the grooves, and the gap between the remaining side plates and the grooves is electroslag welded.

In another prior art (Japanese Patent Publication No. 51-15497), welding grooves are formed on two opposite sides of a reinforcing plate, and two side plates having holes that fit into the grooves are welded to the end face of the reinforcing plate, and The remaining two side plates are disposed opposite to each other opposite the groove, and the gap between the remaining side plates and the groove is electroslag welded.

In these prior art techniques, the side plates and reinforcing plates that make up a long object are directly electroslag welded, so there is a risk that the high heat during electroslag welding may cause distortion on the side surfaces or change the material of the side plates. be.

An object of the present invention is to solve the above-mentioned technical problem, and to prevent the material constituting the elongated object having a closed cross-sectional structure from undergoing distortion or material change due to the high heat during electroslag welding. It is an object of the present invention to provide a method for welding a reinforcing plate to a steel plate.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

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

A long object 1 having a closed cross-section, for example, a rectangular cross-section, has two side plates 2 and 3 extending parallel to each other;
3 and two side plates 4 and 5 extending perpendicularly to each other and parallel to each other.

The reinforcing plate 6 is welded perpendicularly to the inner wall of each side plate 2 to 5 in order to reinforce the elongated object 1.

Fig. 2 is a cross-sectional view taken from the cutting line ■-■ in Fig. 21 during welding of the long object 1, and Fig. 3 is a cross-sectional view taken from the cutting plane line ■-■ in Fig. 2. It is a diagram.

The reinforcing plate 6 includes a reinforcing plate part 9 directly perpendicular to the side plate 2, and a reinforcing plate welded perpendicularly to the side plate 3 facing the side plate 2 and the remaining side plates 4.5 at a position corresponding to the reinforcing plate part 9. plate portion 13.

At the free end of one of the reinforcing plate parts 9, a groove 12 opened toward the side plate 3 is formed by welding a backing plate 10.11 from both the front and back surfaces thereof.

Apply pressure to the free end of the other reinforcing plate portion 13 from both the front and back sides! Temporaries 14, 15 are welded to form grooves 16 opposite said grooves 12.

Through holes 17 and 18 communicating with the groove 16 are bored in the side plates 4 and 5, respectively.

Both reinforcing plate portions 9, 13 are opposed to each other so that a gap 19 is provided between the abutments 10, 11 and 14, 15 when the elongated object 1 is assembled.

Lengths 11 and 12 are determined from the side plates 2 and 3 of both reinforcing plate portions 9 and 13 so that this gap 19 is created.

An elastic and heat-resistant inclusion, such as glass wool 20, is interposed in the gap 19.

In this way, the grooves 12 and 16 of both reinforcing plate parts 9 and 13 are
are opposed to each other, and a hole 21 is formed which communicates with the through holes 17 and 18 of the side plates 4 and 5.

A consumable nozzle, which will be described later, is inserted into this hole 21.
The reinforcing plate 6 is constructed by joining the reinforcing plate parts 9, 13 directly to each other by electroslag welding.

In the welding process, first (1) weld the backing plates 10 and 11 to the reinforcing plate portion 9 to form the groove 12, and attach the reinforcing plate portion 9 directly to the side plate 2;

Next, (2) the reinforcement plates 14 and 15 are placed directly on the reinforcing plate portion 13 to form the groove 16, and the reinforcing plate portion 13 is temporarily attached to the side plate 3 by welding.

(3) Through holes 17 and 18 are bored at predetermined positions in the side plates 4 and 5, and the side plates 3.4.5 are formed into a U-shaped body by direct attachment.

(4) The reinforcing plate portion 13 and the backing plates 14 and 15 are attached to the side plate 3.
, 4.5 respectively.

(5) The grooves 12° 16 of both reinforcing plate portions 9, 13 are made to face each other, and glass wool 20 is interposed between the temporary fittings 10° 11 and 14, 15, so that the side plate 2 is shaped like a U-shaped side plate 3, 4. Overlay on .5.

(6) After temporarily attaching the joints of the side plates 2 and 4, 5 and adjusting the shape, the joints of each side plate 2, 3, 4.5 are fixed in place.

(7) In this state, a consumable nozzle (not shown) is inserted into the through holes 17, 18 and the hole 21, and both reinforcing plate parts 9 and 13 are welded to each other directly by electroslag, thereby completing the welding process.

The above procedure (5X6)i'(m apart, both reinforcing plate parts 9
Although there may be cases where the main welding of the side plates 2 to 5 is performed while the angle 13 is shifted in the longitudinal direction of the long object 1 as shown in FIG. Since the glass wool 20 is interposed between the two, some deviation is allowed.

Even if it collapses as shown in Figure 4, the glass wool 2 is still in the gap 19.
Since the gap 19 is filled with zero, leakage of molten metal from the gap 19 is prevented.

In addition, a plurality of reinforcing plates 6 are provided at intervals in the longitudinal direction of the long object 1.
, by interposing the glass wool 20 between the reinforcing plate parts 9 and 13, each reinforcing plate part 9 and 1
The manufacturing tolerance along the longitudinal direction of the elongated object 1 of 3 can be absorbed, and the interval 13 of the gap 19 can have some tolerance.

Note that the protrusion length 11 of the reinforcing plate portion 9 from the side plate 2 is selected to be as small as possible since the reinforcing plate portion 9 is not welded to the side plates 4 and 5.

In an embodiment of the song of the present invention, inclusions such as glass wool 20 may be omitted.

Although the embodiments of FIGS. 1 to 4 have been described in connection with an elongated object having a rectangular cross section, the present invention can also be practiced in connection with an elongated object having a circular cross section.

Furthermore, electrogas welding may be used instead of electroslag welding.

As a further embodiment of the present invention, as shown in FIG.
5.26 may be welded to form a groove 27, and the other reinforcing plate portion 9 may be fitted into the groove 27 to form the hole 28.

As described above, according to the present invention, an elongated object having a closed cross-sectional structure is prepared by dividing it into two elongated parts along the longitudinal direction, and the reinforcing plate part is provided with mutually opposing grooves in both elongated parts. are welded to each other, a through hole is bored in the long part that communicates with both ends of the groove, and after joining the two long parts with the grooves of both reinforcing plate parts facing each other, weld them together. The welding material is inserted into the opposing grooves through the through holes, and both reinforcing plate parts are welded together by electroslag welding or electrogas welding, so that the materials constituting the long object are electroslag welded. Alternatively, transmission of high heat during electrogas welding is prevented as much as possible, and therefore distortion and change in material properties of the material constituting the long object can be suppressed as much as possible.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention, Fig. 2 is a sectional view taken from the section line ■-■ in Fig. 1 during welding of a long object 1, and Fig. 3 is a cross-sectional view of the long object 1 during welding. 4 is a sectional view showing a state in which the reinforcing plate portions 9 and 19 are shifted in the longitudinal direction of the long object 1, and FIG. 5 is a sectional view of the song according to the present invention. It is a sectional view of an example. 1... Long object, 2, 3, 4.5... Side plate, 6... Reinforcement i-plate, 9
, 13... Reinforcement plate part, 10, 11, 14° 15.25,
26... Backing plate, 12, 16.27... Groove, 17, 18... Through hole, 21... Hole.

Claims (1)

[Claims] 1. A welding method for welding reinforcing plates to the inside of a long object having a closed cross section, the reinforcing plates facing each other and welding material being inserted between both facing surfaces. Forming the hole 2
The long object is divided in advance into two long parts along the longitudinal direction, one of the reinforcing plate parts is welded to the other long part, and the reinforcing plate part of the capacity is made up of two reinforcing plate parts. is welded to the long part of the capacity, a through hole is bored in the long part that communicates with both ends of the hole, and both the long parts are connected to each other with both reinforcing plate parts facing each other. After joining, a welding material is inserted into the hole through the through hole, and both reinforcing plate parts are welded to each other by electroslag welding, electrogas liquid resistance, etc. Welding method for reinforcing plates. 2. The elongated object has a rectangular cross section formed by four side plates, and the elongated object with the rectangular cross section has one side plate,
A method for welding a reinforcing plate inside a long object having a closed cross-sectional structure according to claim 1, wherein the reinforcing plate is prepared by being divided into three remaining side plates. 3. A length having a closed cross-sectional structure according to claim 1 or 2, characterized in that each of the reinforcing plate portions is welded with a patch plate on both the front and back surfaces to form mutually opposing grooves. Welding method inside shakumono. 4. The closed cross-section structure according to claim 3, characterized in that an inclusion having elasticity and heat resistance is interposed between the mutually opposing surfaces of the backing plates of both the reinforcing plate parts. Welding method for reinforcing plates inside long objects. 5. The closed cross-section structure according to claim 1, wherein a groove is formed in the one reinforcing plate portion by welding a patch plate to both the front and back surfaces of the reinforcing plate portion, into which the capacity reinforcing plate portion is inserted. Welding method for reinforcing plates inside long objects.