JPS58187288A - Production of box type structural material - Google Patents

Abstract

PURPOSE:To improve production efficiency considerably, by welding web plates beforehand to the two sides of a diaphragm facing each other then flange plates respectively to the remaining two sides facing each other, by electroslag welding. CONSTITUTION:Web plates 4 are welded beforehand to the two sides of a diaphragm 1 facing each other by electroslag welding so as not to leave any unwelded part. Flange plates 7 are welded to the remaining two sides facing each other so as not to leave any unwelded part. Thereafter, the two plates 4 and the two plates 7 are welded to form a box. The welding is thus accomplished efficiently in easy position and the efficiency of production is increased considerably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a box structural material used as a column or pier, which has a diaphragm in which all four circumferences are welded by electroslag welding. be.

The box structure, which incorporates a diaphragm with all four circumferences welded, is constructed by assembling one stem 7 flange plate and two web plates in a U-shape around the diaphragm, which are conventionally placed at a distance and facing each other. After that, the diaphragm and the web plate are welded by semi-automatic acid gas arc welding, and then the remaining flange plate v is assembled into a box shape by applying it to the two web plates, and then the two flange plates and the diaphragm are welded using electroslag. 1
It was manufactured by welding with 11 contacts.

However, in this conventional method,
Since simultaneous welding is not possible when welding the sides to the web plate, it is difficult to maintain a sufficient welding position in a narrow U-shaped area where welding deformation is likely to occur, and the diaphragm is usually a thick plate. Therefore, a high degree of skill is required for welding in order to avoid welding defects, and high current cannot be used, resulting in poor welding efficiency 7. At the start and end of carbon dioxide arc welding, there are approximately 20 unwelded parts. This occurs and the four circumferences of the diaphragm cannot be completely welded into the box.

The present invention was devised in order to solve the above-mentioned problems of the conventional art, and firstly, two web plates are attached to the surface of the 82 flange plates that come in contact with each other to assemble into a box, and then a cube plate is attached to two opposing sides of the diaphragm. , then flange plates fr on each of the remaining two opposing sides.
: Electroslag S* to avoid leaving welding residue
By welding, it is possible to sufficiently suppress the occurrence of internal distortion and welding defects that can be a problem when assembling into a box, and it is also possible to perform welding efficiently in a comfortable position, greatly improving manufacturing efficiency. It is an object of the present invention to provide a method for manufacturing a box-shaped structural material that can be manufactured using the following methods.

The present invention will be explained below with reference to the drawings.

Fig. 1 shows a diaphragm built into a box-shaped structural member. In the figure, 1 is the diaphragm. On the four circumferences of the diaphragm, there are groove-shaped grooves 5 that are opened on the outer periphery by backing metals 2 attached to the front and back surfaces of the diaphragm. are provided consecutively.

In the present invention, as shown in FIG. 2 and @511, first, a plurality of the diaphragms 1v are arranged facing each other at intervals, and then the web plates 4 are arranged on both sides of the diaphragms 1, respectively. of each diaphragm 1,
A refractory material 5t for preventing the flow of molten slag is fixed inside the end of the groove 1s3 that is not covered by the web plate, and a hollow part 6 reaching the end of the web plate is formed between the diaphragm 1 and the cube grate 4 by means of the support personnel 5. Form.

Note that the refractory material 5 is preferably connected to the diaphragm 1 before being combined with the diaphragm 1 (for example, the diaphragm 11).
Attach it in advance when assembling. The web plate 4 is preliminarily formed with a groove 8 for welding with a flange plate 7 (described later) (see FIG. 3).

Then, as shown in 4WA and FIG.
Web plate 40 groove 11B at the upper and lower ends of s6 respectively
Split type steel end tab 9 with a special shape to match the shape of the
104 After fixing, the upper end tab 9 is energized and the cavity 1s
6&c nozzle 11 and wire 12t are inserted, and two opposing sides of diaphragm 1 and web plate 4 are simultaneously welded with electroslag ll1iK in hollow part 6.

This welding is performed on the diaphragm 1 as shown by the arrow in Figure 2.
02 sides are simultaneously welded, and the welding directions are alternately changed in the box longitudinal direction (web grate longitudinal direction), or, although not shown, the two sides of diaphragm 1**t' are welded in different welding directions, and the box longitudinal direction is welded simultaneously. Even the direction!
It is possible to carry out the welding by alternating the tangent directions, or by making the welding directions on all the two sides of the diaphragm 10 the same.

Next, as shown in FIGS. 6 and 7, the refractory material 5v is removed, and the part of the welded metal 1S adjacent to the refractory material 5 is removed by chiseling or the like, and the groove portion 3 of the diaphragm 1 is removed from the end of the diaphragm. Web plate 4
A welding hole 141 communicating with the groove 5 is formed (groove shaping).

After this groove shaping, as shown in FIG.
A cavity 6At- is formed between the diaphragm 1 and the flange plate 7, reaching the end of the flange plate. After that, although not shown, the whole body is rotated by 90°, and the welding hole 14 is
After fixing steel or refractory material in the grooves 8 on both sides, fix the end tabs 9 and 1o and insert the nozzle 11 and wire 12 in the same manner as above to fill the cavity.
6AK, the remaining two opposing sides of the diaphragm 1 and the flange plate 7 are simultaneously welded by electroslag welding. This welding is also performed in the same procedure as the f# welding.

After this welding, although not shown, the angle St of the groove portion 8 provided on the web plate 4 and the flange plate 7 is welded by semi-automatic or automatic carbon dioxide arc welding or the like.

Since the present invention has the above configuration, it has the following effects.

(1) All four sides of the diaphragm can be completely welded without leaving any welding residue.

(2) Since all four sides of the diaphragm are welded by electroslag welding, welding defects are less likely to occur and welding efficiency can be greatly increased.

(5) After the web plates on two opposing sides of the diaphragm are brought into S contact, #7 lunge plates are placed on the remaining two opposing sides of the diaphragm. Since they are in contact with each other, it is possible to prevent torsional deformation and internal strain from occurring when assembling the box.

(4) Two sides of the diaphragm and web plate vi1
Primary welding is easy because the groove can be easily and reliably shaped by removing the refractory material and the weld metal adjacent to the refractory material, and by forming weld holes in the web plate. ), work efficiency can be further improved.

Therefore, according to the present invention, an excellent box structure material can be efficiently manufactured.

[Brief explanation of drawings]

Fig. 1111 is a perspective view of the diaphragm, Fig. 2 is a perspective view showing the groove shaping situation for primary welding, Fig. 3 is a partial detailed view of Fig. 2, and Fig. 4aiil shows the situation of primary welding. 5 is a detailed view of a portion of FIG. 4, FIG. 6 is a perspective view showing the groove shaping situation for secondary welding, FIG. 7 is a detailed view of a portion of FIG. 6, and FIG. It is a perspective view showing the situation before box assembly. Part 1...Diaphragm, 2
...Backing money, 5...Bevel part, 4...
... Web plate, 5 ... Fireproof material, 6.6
Person: Cavity, 7: Flange plate, 8: Groove, 9, 10: End tab, 11: Nozzle , 12...Wire, 13...Weld metal, 14...Weld hole. 4

Claims (1)

[Claims] Groove-like grooves IIv continuously opened on the outer periphery of the diaphragm are provided in advance, and web plates are arranged on both sides of the plurality of diaphragms arranged facing each other at intervals. A refractory material for preventing the flow of molten slag is fixed within the end of the groove that is not obstructed by the groove, and a cavity is formed between the diaphragm and the web plate by the refractory material, and the cavity reaches the end of the web plate. The diaphragm and web plate are welded together using electroslag welding. Next, after removing the refractory material and the part of the welded metal adjacent to the refractory material and forming a welding hole facing the groove l1st in the web plate, seven funge plates are placed on each side with the web plate in between. Then, a cavity extending to the end of the flange plate is formed between the diaphragm and the flange plate, and then the diaphragm and the flange plate are welded by electroslag welding in the shell cavity. Next, the method for manufacturing a box structural member in which the web plate, franchise plate, and plate are welded to form a T's image.