JP2835597B2 - Method of manufacturing backing metal for non-scallop method and backing metal using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-scallop method in which a backing metal is applied to a fillet portion and a flange portion on both sides of a web portion of a beam H-beam, and welding is performed to a column material. And a method of manufacturing the above backing metal.

[0002]

2. Description of the Related Art It is possible to weld a steel beam and a column,
In order to increase the joint strength, the backing metal is welded to the column material by applying separate backing metal to the fillet portion and the flange portion on both sides of the web portion of the beam H-beam. The non-scallop construction method of performing is widespread.

[0003] Incidentally, since the fillet portion (the boundary portion between the web portion and the flange portion) of the H-section steel of the beam is formed in a round shape, the backing metal is brought into close contact with the fillet portion. It is necessary to make the end of the backing metal into a round shape. In addition, even if the building conditions such as the beam H-beam used change, the thickness and width of the backing metal can be constant (9 x 25 mm), but the length of the backing metal is not limited. Need to be changed according to Also, there are three types of radius shapes (new JIS standard) with a radius of 8, 13, and 18 mm.

Conventionally, this backing metal is obtained by rolling one long material to be rolled by a rolling roll having a round shape, and has a constant thickness (thickness of the backing metal) and a certain width (backing metal). Length), and a long rolled material having a round shape at the end in the width direction. Then, the rolled material is cut at a width of the backing metal in a direction perpendicular to the length to produce a backing metal (Weekly Steel Structure Journal No. 7).
20 (April 15, 1996 issue), page 9, published by Steel Structure Publishing Co., Ltd. 1-113-21 Shintomi, Chuo-ku, Tokyo).

[0005]

However, after rolling by an expensive rolling roll having a round shape,
Since each backing metal having a certain width (eg, 25 mm) must be cut, there is a problem that the manufacturing operation is extremely complicated and the manufacturing cost is extremely high. Also, since the rolls are expensive,
Since one roll of a medium radius shape (for example, a radius of 15.5 millimeters) having a radius of 8, 13, or 18 millimeters is intended to correspond to all radius shapes,
A gap is generated between the fillet portion and the rounded portion of the backing metal. In addition, for backing metal of different lengths, it is necessary to first produce a rolled material having a certain width (length of the backing metal) by rolling rolled materials having different widths with rolling rolls. Therefore, there is a problem that it is not possible to respond flexibly to a change in the length of the backing metal.

The thickness and width of the backing metal (eg, 9 × 2
Prepare a ready-made steel material (eg, flat bar) having a diameter of 5 mm, cut it to the required length, and then grind the end into a rounded fillet shape with a grinder or other grinding device. Can be considered. However, skill is required to grind the steel into a predetermined round shape, and the steel material must be ground one by one. Therefore, the manufacturing time is extremely long, and the manufacturing cost is extremely high.

Therefore, an object of the present invention is to provide an extremely inexpensive backing metal of various lengths,
It is another object of the present invention to provide a method of manufacturing a backing metal for a non-scallop method, in which no gap is formed between the fillet portion and the rounded portion of the backing metal, and a backing metal using the same.

[0008]

To achieve the above object of the Invention The present invention is, on both sides of the full across the web portion of the beam member H-shaped steel
In the method of manufacturing a backing metal according to the non-scallop method, in which a backing metal is applied to a column portion and a flange portion and welding is performed on a column material, an end portion of a steel material having a longitudinal right-angle cross-sectional shape of the backing metal is provided. Is cut in the width direction by using a mold whose cross section in the direction perpendicular to the movement of the relative movement surfaces of the male and female molds of the press is the round shape of the fillet portion.

[0009] After the press cutting, by reversing the direction of the steel material, again pressing the cutting portion of the steel material, from the opposite direction, it is preferable to press cut with the upper Kikin type symmetrical mold.

[0010] Three types of molds corresponding to the rounded shape of the fillet portion are prepared, and a flat bar of 9 x 25 mm is prepared. The determination of the length in the flat bar of 25 mm preferably accommodates the various required backings.

In order to achieve the above object, the backing metal for the non-scallop method of the present invention is manufactured by the manufacturing method described in any one of the above items.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a press die 2 used in the present invention will be described with reference to FIG. There are three types of H-shaped fillet round shapes used for construction, with radii of 8 mm, 13 mm and 18 mm (new JIS standard). Accordingly, dies 2 are prepared for the radius of the fillet portion of each radius, and each of the dies 2 is a rough press die (hereinafter also referred to as a first die) 4. , And two pairs of dies (hereinafter, also referred to as second dies) 6 for finishing press which are symmetrical with each other.

First, the first mold 4 will be described. First
The male mold 8 of the mold 4 has a cutting blade surface portion 10 having a round cross-section in a horizontal direction in a fillet portion. The cutting blade surface 10 serves as a relative moving surface with a female mold described later. The female mold 12 has, at the front right end, a relative moving surface 16 with the male mold 8 having a round cross-section in the form of a fillet at the horizontal section. When pressed and cut, so that it is thicker than the desired round shape, for example, by about 0.8 mm,
The shapes of the relative moving surfaces 10 and 16 of the male mold and the female mold are determined. A flat bar loading portion 14 for loading and positioning the flat bar is provided at the center of the relative movement surface portion 16 in the vertical direction. That is, the flat bar loading portion 14 is open at the right side portion 15 and is open at the other three surfaces and at the front and rear portions. The upper and lower heights of the flat bar loading section 14 are almost equal to the width w of the flat bar, and the left and right lengths are almost equal to the thickness t of the flat bar (see FIG. 1). The base 17 is provided with a guide die 18 that serves as a guide for the male die 8 moving up and down. Next, a flat bar rear end positioning member 20 is provided at the rear of the female mold 12. The flat bar rear end positioning member 20 is fixed to the base 17 by bolts 21. After inserting the flat bar into the flat bar loading unit 14 from the right rear direction through the right opening 15,
Rearwardly shift the rear end of the flat bar 43 (see FIG. 1).
To the flat bar rear end positioning member 20 to perform positioning.

Next, the second mold 6 will be described. The male mold 28 has a cutting blade surface portion 30 having a round cross section in the shape of a rounded fillet. The cutting blade surface portion 30 serves as a relative movement surface with a female mold described later. The female mold 32 has, at the front left end, a surface 36 that moves relative to the male mold 28 whose horizontal cross section is a rounded fillet. The female mold 12 for the first mold 4 and the female mold 32 for the second mold 6 are formed on the same member. The shapes of the relative moving surfaces 30 and 36 of the male mold and the female mold are determined so that the final round shape is obtained when the press cutting is performed. A flat bar loading portion 34 for loading and positioning the flat bar is provided at the center of the relative movement surface portion 36 in the vertical direction. That is, the left side portion 35 of the flat bar loading portion 34 is open,
The other three surfaces, and the front and rear portions are open. The vertical height of the flat bar loading section 34 is the width w of the flat bar.
And the left and right lengths are substantially equal to the thickness t of the flat bar (see FIG. 1). Also, on the base 17,
A guide mold 38 is provided to guide the male mold 28 up and down. Next, the flat bar rear end positioning member 20 for the first die 4 is also used as the flat bar rear end positioning member 20 for the second die 6. The operator moves the flat bar from the left rear to the left opening 35.
After that, the flat bar rear end 43 (see FIG. 1) is shifted rearward so as to abut against the flat bar rear end positioning member 20 to perform positioning.

Next, a method of manufacturing the backing metal will be described with reference to FIG. A commercially available (off-the-shelf) SM490 flat bar 42 having a predetermined cross-sectional area shape, that is, a rectangular cross-sectional shape of 9 × 25 mm is used as a material for processing the backing metal. This eliminates the need to cut the backing metal in the width and thickness directions. At present, a rectangular cross-sectional shape of 9 × 25 mm is used as a backing metal for joining various beam members H-beams and column members. Therefore, if this commercially available product is used, all of these joints are used. Can be used.

Given the conditions and the like of the beam H-beam to be used, one of the three types of molds 2 is selected and the length of the backing metal is determined accordingly. Then, the selected mold is mounted on a press device (not shown), and the flat bar rear end positioning member 20 is fixed at predetermined front and rear positions by bolts 21 according to the determined length of the backing metal.

The flat bar 42 is first cut to the determined backing metal length using a shearing machine, a band saw machine or the like (FIG. 1).

The cut flat bar 42
Is loaded and positioned in the flat bar loading section 14 of the first die of the die 2 mounted on the press device, with the width direction oriented vertically.

Then, the flat bar 42 is moved to the right side opening 1.
With the hand pressed from 5, the button of the press device is pressed to lower the male mold 8. Then, the cutting blade surface 10 cuts the end of the flat bar 42 (of FIG. 1).

Next, the flat bar 42 pressed and cut by the first mold 4 is taken out of the flat bar loading section 14, the orientation thereof is reversed, and the flat bar 42 is inserted into the flat bar loading section 34 of the second mold 6.・ Positioning (of FIG. 1). In the rough press, since the male mold 8 press-cuts the SM490 having a vertical height of 25 mm, the lower part of the cut surface (the upper part of the cut surface in FIG. 1) 44 has a recessed portion formed in the cut surface. The cut surface in the vicinity has a large warped scale, which is injured when touched by hand. At the edge on the downstream side of the press cutting (upper edge of the cutting surface in FIG. 1) 47, since the cutting blade surface 10 acts on the side for pushing the edge to the outside, a large “burr” in the outward direction occurs. I have.

Next, a new flat bar 42 is inserted and positioned in the flat bar loading portion 14 of the vacant first mold 4.

Then, a button of the press device is pressed. Then, the first male mold 8 and the second male mold 28 are simultaneously lowered. And the cutting blade surface 30 of the second male mold 38 is
The surface of the cut surface of the flat bar 42 already formed by the cutting blade surface 10 of the male die 8 is further press-cut to a thickness of 0.8 mm (FIG. 1). At this time the first
The concave, scaly, “burrs” 44 and 47 formed by the cutting blade surface 10 of the male mold 8 of FIG.
First of all, it is cut by pressing.
"Return" etc. are removed neatly. Also, since only press cutting is performed with a thickness of 0.8 mm, the second
In the press cutting by the die 6, no concave portion, scale-like, "burr", etc. on the downstream side of the press cutting as in the first die 4 are generated. As a result, the backing metal 48 having a clean cut surface is obtained over the entire cut surface 49 (FIG. 1). The removed backing metal 48 may be subjected to shot blasting to further finish the processed surface. On the first male and female mold 4 side, a new flat bar 42
A rough press is being carried out.

Normally, the pressing is performed by tilting the material to be pressed in a state where the direction of thickness of the material to be pressed or the direction in which the generatrix of the processed shape extends horizontally is horizontal. However, in order to press-cut the round shape of the fillet portion in such a posture, infinite press cutting must be performed. Accordingly, the present invention manufactures a mold having a rounded shape of a fillet portion in a cross section perpendicular to the movement of the relative movement surface, and the mold is formed in a state where the width direction of the flat bar is directed to the movement direction of the mold. Press cutting. Furthermore, by preparing two sets of male and female molds of a press having a rounded shape of the fillet part, turning the flat bar in the opposite direction, and press-cutting with these two sets of molds, An extremely good press cut surface is obtained.

In this manner, each time the male molds 8 and 28 descend, the flat bar 42 pressed and cut by the first mold 4 is taken out, the direction is reversed, and the backing metal 48 of the product is formed. The operation of inserting and positioning the removed flat bar into the flat bar loading section 34 on the second mold 6 side and inserting and positioning a new flat bar into the flat bar loading section 14 on the vacant first mold 4 side is repeated. . Since two presses can be performed at a time, the work efficiency of press cutting is high. The first mold 4 and the second mold 6 are symmetrically arranged, and press cutting is performed simultaneously by the two molds 4 and 6, so that the press machine acts as a reaction force at the time of press cutting. The forces in the left and right directions cancel each other, and no unreasonable force is generated in the press device body.
No opening in the left-right direction occurs between the male mold 8 or 28 and the female mold 12 or 32.

In this way, the ready-made flat bar 4
2 and the selection of the three types of molds 2 and the determination of the length of the backing metal, the backing metal of any required condition can be manufactured flexibly, easily and inexpensively.

As shown in FIG. 4, the manufactured backing metal 48 is subjected to groove processing at the ends 54 of both flange portions 52 of the beam H-beam 50, and then sandwiches the web portion 56. In each of the two sides, the position of the end portion 54 is fixed by tack welding. On both sides of the web portion 56,
The end face 45 or 46 of the backing metal 48, which is flush with the end face 58 of the web portion 56, is reversed.
There is no "Kaeri" in 6, so "Kaeri"
Does not protrude from a part of this surface. Since the cut is performed by any one of the three types of rounds, the round surface 49 of the backing metal can be in close contact with the round shape of the fillet portion 60.

Beam H-shaped steel 52 to which backing metal is temporarily attached
After a steel tab or the like is attached to the end of the backing metal (not shown), it is conveyed to a construction site and positioned with respect to a pillar (not shown). Since there is no "burr", the end surface 45 or 46 of the backing metal can be brought into close contact with the pillar, and accurate positioning can be performed. Next, electric welding is performed between the column member and the groove portion 54, and the beam 5
2 and the column material are joined (not shown).

In the above-mentioned embodiment, the flat bar loading portion is formed to have a shape opened to the side. However, as shown in FIG. 3, side plate portions 115 and 135 are provided, and the flat bar loading portion 11 is provided.
4, 134 may be closed sideways, and a flat bar may be inserted and loaded into the flat bar loading portion from the rear opening. At this time, the positioning member in the front-rear direction of the flat bar is provided at a front portion of the flat bar (not shown). As a result, it is only necessary to insert and push forward, and the loading operation can be speeded up, the positioning in the lateral direction can be ensured, and the safety of the operator when cutting the press can be further ensured. Further, in the above embodiment, the rough press die 4 and the finish press die 6 are simultaneously mounted on the press device. However, each of the rough press die 4 and the finish press die 6 is independently mounted on the press device, and the rough press cutting and cutting are performed separately. Finish press cutting may be performed.

[0029]

According to the present invention, in the width direction of a steel material having a longitudinal right-angle cross-sectional shape of a backing metal, the cross-sectional shape in the direction perpendicular to the movement of the relative moving surfaces of the male and female dies of the press is the shape of the rounded fillet portion. Since the press cutting is performed by using the mold, the backing metal can be manufactured extremely easily and at low cost.

Also, first and second dies having a rounded fillet shape are prepared. The first and second dies are press-cut, and then the direction of the steel material is reversed to form a second dies. By performing press cutting again, a good round shape of the fillet portion can be obtained despite cutting in the width direction having a long cut surface.

Male and female dies for presses corresponding to the three types of fillet round shapes are prepared, and a flat bar having a certain thickness and width is first cut into a predetermined backing metal length. Next, by using any one of the three types of molds to manufacture the radius of the fillet portion, various required backing metal can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view of one embodiment of a method of manufacturing a backing metal for a non-scallop method according to the present invention.

FIG. 2 is a perspective view of a mold used in FIG.

FIG. 3 is a cross-sectional view of a female mold used in another embodiment of the method of manufacturing the backing metal for the non-scallop method of the present invention.

FIG. 4 is a perspective view showing a use state of a backing metal for a non-scallop method.

[Explanation of symbols]

4 First (for rough press) male and female dies 6 Second (for finish press) male and female dies 10,30 Relative moving surface of male dies (press cutting blade surface) 16,36 Female dies Relative moving surface of mold 42 Steel material (flat bar) having cross section perpendicular to longitudinal direction of backing metal 48 Backing metal 50 Beam H-shaped steel 52 Flange part 56 Web part 60 Fillet part

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B23D 23/00 B23D 35/00 B23K 9/00 501 B23K 9/02 B23K 37/06

Claims (4)

(57) [Claims] [Claim 1] either side of the full across the web portion of the beam member H-shaped steel
In the method of manufacturing a backing metal according to the non-scallop method, in which a backing metal is applied to each of the column portion and the flange portion, and welding is performed on the column material, an end of the steel material having a longitudinal right-angle cross-sectional shape of the backing metal is provided. Non-scallop method using a mold having a cross section in the width direction, the cross section in the direction perpendicular to the movement of the relative moving surfaces of the male and female molds of the press being the round shape of the fillet part. How to make backing metal. 2. The method of claim 1, after the breath cut, by inverting the direction of the steel, again the press cutting portion of the steel material, from the opposite direction, the upper Kikin type symmetrical mold A method for producing a backing metal for a non-scallop method, wherein the backing metal is non-scalloped. 3. A mold according to claim 1 or 2, wherein three types of dies corresponding to the round shape of the fillet portion are provided, and a 9 × 25 mm flat bar is provided. A method of manufacturing a backing metal for a non-scallop method, wherein the backing metal for a non-scallop construction method is adapted to various required backing metal by selecting in a die and determining a length of the flat bar of 9 × 25 mm. 4. A backing metal for a non-scallop method, which is manufactured by the manufacturing method according to claim 1.