JP3192910U - Backing material for welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backing material for welding which can prevent welding omission, prevent foreign matter from being mixed in a welded portion, and can smooth and clean the surface of solidified molten metal. SOLUTION: A backing material for welding is formed by connecting a plurality of rod-shaped backing material parts made of an inorganic material arranged in parallel with a metal connecting sheet, and each of the backing material parts is made of The cross-sectional shape is substantially isosceles trapezoid, and the connecting sheet adhesive surface 16 to which the connecting sheet of the lower bottom is adhered, the welded object contact surface 18 in contact with the welded object of the upper bottom thereof, and the first and first The second side wall surfaces 20 and 22 are provided, and wedge-shaped cuts 24 and 26 having a predetermined angle B are formed on both side portions of the lower bottom. [Selection diagram] Fig. 3

Description

  The present invention relates to a welding backing material, and more particularly to a welding backing material used when welding deformed reinforcing bars.

As a backing material for welding used when welding deformed reinforcing bars, a backing material for enclosing welding described in Japanese Patent No. 3378136 is known.
The backing material for enclosing welding according to the first device of Japanese Patent No. 3378136 has a plurality of rod-shaped ceramic members and the ceramic members aligned in parallel to support adjacent ceramic members so that they can be bent. And is formed of a flexible member selected from the group consisting of a ceramic fiber, a ceramic band, and a ceramic net, and is fixed to the surface of the ceramic member. It is characterized by that.

  The backing material for enclosing welding according to the second device of Japanese Patent No. 3378136 has a plurality of rod-shaped ceramic members and the ceramic members aligned in parallel, and adjacent ceramic members are connected to each other so that they can be bent. It is characterized by the above-mentioned, and the said locking material is comprised with the metal wire.

  The backing material for enclose welding according to the third device of Japanese Patent No. 3378136 is composed of a single rectangular plate-shaped ceramic member, and a plurality of surfaces extending in the width direction on one surface of the ceramic member. Parallel notches of the book are formed at a constant pitch in the longitudinal direction of the ceramic member, and a locking material is fixed in a direction perpendicular to the notches formed in the ceramic member. Sometimes the ceramic member is locked by the locking material, and the locking material is composed of one type of flexible member selected from the group consisting of ceramic fibers, ceramic bands and ceramic network, It is fixed to the surface.

Japanese Patent No. 3378136

  In the backing material for enclose welding according to the first and second inventions of the above-mentioned Patent No. 3378136, because the ceramic member which is a constituent element of the backing material is rod-shaped or rectangular plate-shaped, A gap is formed between adjacent ceramic members from the beginning, and the enclosing welding backing material according to the third device is cracked from the notch portion when bent according to the curve of the reinforcing bar surface. As a result, there is a crack or gap in this portion. As a result, when robot welding is performed, there is a problem that welding is lost and the robot stops.

Further, due to the gaps or cracks, irregularities are generated on the surface of the solidified molten metal, and post-treatment such as surface processing may be necessary.
Furthermore, in the backing material for enclose welding of the patent, since the anchoring material comes to the reinforcing bar side to be welded when actually used, foreign matter may enter the welded portion and become a welding defect. is there. Furthermore, a sealing material trace is generated on the surface of the solidified molten metal. In this case as well, post-processing such as surface processing may be necessary.

  Therefore, the present invention has an object to provide a welding backing material that can prevent welding failure, does not cause foreign matters to be mixed in the welded portion, and can make the surface of the solidified molten metal smooth and clean. .

The object is achieved by a welding backing material having the following configurations (1) to (16) of the present invention.
(1)
Backing material for welding formed by connecting a plurality of rod-shaped inorganic material backing material parts arranged in parallel with a metal connecting sheet,
Each of the backing material parts has a substantially isosceles trapezoidal cross-sectional shape, and comes into contact with a connection sheet bonding surface to which the connection sheet on the lower base is bonded, and an object to be welded on the upper base. A workpiece contact surface, and first and second side wall surfaces;
A welding backing material, wherein wedge-shaped cuts of a predetermined angle are formed on both sides of the lower bottom.
(2)
The welding backing material according to (1), wherein the connection sheet is bonded not only to the connection sheet bonding surface but also to a tapered surface formed by the cutting.
(3)
The welding backing material according to (1) or (2), which is used by being bent in accordance with the curved surface of the surface of the workpiece.
(4)
The backing material for welding according to any one of (1) to (3), wherein the backing material part is formed of a material containing SiO ₂ and Al ₂ O ₃ as main components.
(5)
For the welding according to (4), the material of the backing material part is at least one material selected from refractory materials such as silica sand for casting, clay shale, kyanite, wax, dolomite, and magnesite. Backing material.
(6)
The welding backing material according to any one of (1) to (5), wherein the material of the welding backing material is a welded end tab material, a backing material production defect product, or a pulverized product of used waste material.
(7)
The welding flexible material according to any one of the above (1) to (5), wherein the material of the welding backing material is a pulverized product of a furnace refractory material such as a furnace material such as iron making, non-ferrous smelting and firing furnaces, and a hot water channel Sex backing material.
(8)
The welding backing material according to any one of (1) to (3), wherein the material of the welding backing material is flux powder.
(9)
The welding backing material according to any one of (1) to (8), wherein the connection sheet is made of aluminum.
(10)
The welding backing material according to any one of (1) to (9), wherein an inclination angle of the first and second side wall surfaces is 10 to 17 degrees.
(11)
The welding backing material according to any one of (1) to (10), wherein a taper angle of the tapered surface is 10 to 17 degrees.
(12)
(1) to (11), wherein a concave portion for forming a molten metal surplus in the weld joint is formed on the workpiece contact surface so as to extend in the width direction of the backing material component. Any welding backing material.
(13)
(12) The welding backing material according to (12), wherein the concave portion has an elliptical arc shape whose side surface is centered on a short axis.
(14)
The welding backing material according to (13), wherein the ellipticity of the elliptic arc of the recess is 0.857 to 0.95.
(15)
The welding backing material according to (13) or (14), wherein the maximum depth of the recess is 0.5 to 2.0 mm.
(16)
Both side portions of the connecting sheet protrude from both ends in the longitudinal direction of the backing material part, and serve as attachment portions when the welding backing material is attached to the welding base material (1) to (15). Any of the welding backing material.

In the welding backing material of the present invention, the V-shaped groove formed by the side wall surface of the adjacent backing material parts of the plurality of backing material parts constituting the welding backing material is a reinforcing bar that is a workpiece. When bent to match the surface, the V-shaped groove tends to close, so that the groove becomes narrower or completely eliminated, and therefore, weld loss can be suppressed as much as possible.
In the welding backing material of the present invention, the welded object contact surface is formed such that the side surface shape is an elliptical arc centered on the minor axis and extends in the width direction of the backing material component. Therefore, there is also an effect that the welded surface in the welded joint portion has an ideal shape that becomes a surplus portion slightly swollen from the outer peripheral surface of the base material.

  Furthermore, the connecting sheet that connects the backing material parts is the side opposite to the surface of the work piece when using the welding backing material, and usually does not touch the molten metal. Foreign matter is not mixed in.

1 is a perspective view of a welding backing material according to an embodiment of the present invention. FIG. 2 is a front view representatively showing two adjacent backing material parts constituting the welding backing material shown in FIG. 1. It is the front view which expanded and showed the backing material components shown in FIG. It is the side view which expanded and showed the backing material components shown in FIG. (A) And (b) is a front view which shows the example which applied the backing material for welding shown in FIG. 1 to the reinforcing bar of a different diameter.

Hereinafter, a welding backing material 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
A welding backing material 10 according to an embodiment of the present invention is formed by connecting a plurality of rod-shaped inorganic material backing material parts 12 arranged in parallel by a metal connecting sheet 14. It is preferable that both side portions of the connecting sheet 14 protrude from both end portions in the longitudinal direction of the backing material part, and serve as attachment portions 14a for attaching the welding backing material to the welding base material. That is, it is preferable that the width of the connecting sheet 14 be equal to or longer than the length of the backing material component from both longitudinal ends of the backing material component 12. And it is preferable that the adhesive layer is previously formed in the backing material side surface of the attaching part 14a, and the release paper is bonded together on it.

Each of the backing material parts 12 has a substantially isosceles trapezoidal cross-sectional shape, and a connection sheet bonding surface 16 to which the connection sheet 14 on the lower base is bonded, and an article to be welded on the upper base. A workpiece contact surface 18 that contacts M and first and second side wall surfaces 20 and 22 are provided, and wedge-shaped cuts 24 and 26 of a predetermined angle are formed on both sides of the lower bottom.
As shown in FIG. 4, the main welding backing material 10 is bent and used in accordance with the curved surface of the surface of the workpiece. 4A is a reinforcing bar having a diameter of 22 mm, and the reinforcing bar M2 of the welding object in FIG. 4B is a reinforcing bar having a diameter of 36 mm. 4 (a) and 4 (b), it can be seen that the side walls 20 and 22 adjacent to each other are narrower (closely) when bent with a small radius.

  The connecting sheet 14 is bonded not only to the connecting sheet bonding surface 16 but also to the tapered surfaces 28 and 30 formed by the cuts 24 and 26. As described above, the connection sheet 14 is bonded not only to the connection sheet bonding surface 16 but also to the tapered surfaces 28 and 30. When the connecting sheet 14 is bent and attached to the workpieces M1 and M2, the connecting sheet 14 is pulled as shown in FIG.

As shown in FIG. 4, the welded object contact surface 18 is formed with an elliptical arc-shaped recess 32 whose side surface shape is centered on the minor axis so as to extend in the width direction of the backing material component 12. . The oblateness of the elliptic arc of the recess 32 is preferably 0.857 to 0.95. The recess 32 may be arcuate, arcuate or elliptical on both sides, flat at the center, or rectangular.
It is preferable that the minor axis of the elliptical arc of the recess 32 is located at the center line position of the backing material part 12 in the width direction. Moreover, it is preferable that the maximum depth A of the said recessed part 32 is 0.5-2.0 mm.

The backing material part 12 is preferably formed of a material containing SiO ₂ and Al ₂ O ₃ as main components. The material of the backing material part 12 is preferably at least one material selected from refractory materials such as silica sand for casting, clay shale, kyanite, wax, dolomite, and magnesite. The material of the welding backing material 12 may be a welded end tab material, a backing material manufacturing defect product, or a pulverized product of used waste material. Furthermore, the material of the welding backing material 12 may be a furnace material such as iron making, non-ferrous refining or firing furnace, or a pulverized product of waste refractory such as a hot water channel. As a result, industrial waste can be reused, and disposal costs can be saved. The material of the welding backing material may be flux powder.

  The connecting sheet 14 is preferably made of aluminum.

  The inclination angle A of the first and second side wall surfaces 20 and 22 is preferably 10 to 17 degrees. For example, as shown in FIG. 5B, the angle formed by the two adjacent side wall surfaces 20 and 22 is 9.7 degrees even when attached to a welding base material M2 having a diameter of 36 mm. There is no missing weld. As shown in FIG. 5 (a), when it is attached to the welding base material M1 having a diameter of 22 mm, the two adjacent side wall surfaces 20 and 22 are almost completely in close contact with each other, so that there is no weld drop. .

  The taper angle B of the tapered surface is preferably 10 to 17 degrees. This is because the angle of inclination of the aluminum sheet must be the same as that of the inclination angle A in order to ensure the elongation allowance.

  The ellipticity of the elliptic arc of the recess 32 is preferably 0.857 to 0.95. This is because the ratio is necessary to secure an ideal route gap during welding. The maximum depth of the recess 14 is preferably 0.5 to 2.0 mm. This is because the depth is necessary to create an ideal appearance after welding.

  The two adjacent side wall surfaces 20 and 22 of the welding backing material 10 are open to each other when the welding backing material 10 is in the flat state shown in FIG. As shown in FIG. 5, when the connecting sheet 14 side is bent outward, the two adjacent side wall surfaces 20 and 22 are oriented with respect to the connecting sheet 14 side end, that is, in a closing direction. To turn. As a result, there is no missing weld when actually welding.

  Furthermore, the connecting sheet that connects the backing material parts is the side opposite to the surface of the work piece when using the welding backing material, and usually does not touch the molten metal. Foreign matter is not mixed in.

DESCRIPTION OF SYMBOLS 10 Backing material for welding 12 Backing material components 14 Connection sheet 16 Connection sheet adhesion surface 18 Workpiece contact surface 20 First side wall surface 22 Second side wall surface 24 Notch 26 Notch 28 Tapered surface 30 Tapered surface 32 Recessed portion M1 Workpiece M2 Workpiece

Claims (16)

Backing material for welding formed by connecting a plurality of rod-shaped inorganic material backing material parts arranged in parallel with a metal connecting sheet,
Each of the backing material parts has a substantially isosceles trapezoidal cross-sectional shape, and comes into contact with a connection sheet bonding surface to which the connection sheet on the lower base is bonded, and an object to be welded on the upper base. A workpiece contact surface, and first and second side wall surfaces;
A welding backing material, wherein wedge-shaped cuts of a predetermined angle are formed on both sides of the lower bottom.   The welding backing material according to claim 1, wherein the connection sheet is bonded not only to the connection sheet bonding surface but also to a tapered surface formed by the cutting.   The welding backing material according to claim 1 or 2, wherein the welding backing material is bent according to the curved surface of the surface of the workpiece. The backing component may be any welding backing material according to claim 1 to 3, which is formed of a material containing SiO ₂ and Al ₂ O ₃ as a main component.   The welding back according to claim 4, wherein the material of the backing material part is at least one material selected from refractory raw materials such as silica sand for casting, clay shale, kyanite, wax, dolomite, and magnesite. Batting material.   The welding backing material according to any one of claims 1 to 5, wherein the material of the welding backing material is a welded end tab material, a backing material production defect product, or a pulverized product of used waste material.   The flexible backing material for welding according to any one of claims 1 to 5, wherein the material of the welding backing material is a pulverized material of a waste refractory material such as a furnace material such as iron making, non-ferrous smelting and firing furnaces, and a hot water channel. Wood.   The welding backing material according to any one of claims 1 to 3, wherein the welding backing material is flux powder.   The said backing sheet is a product made from aluminum, The backing material for welding in any one of Claims 1-8.   The welding backing material according to any one of claims 1 to 9, wherein an inclination angle of the first and second side wall surfaces is 10 to 17 degrees.   The welding backing material according to any one of claims 1 to 10, wherein a taper angle of the tapered surface is 10 to 17 degrees.   The recessed part for forming the surplus of a molten metal in a welding joint part is formed in the said to-be-welded object contact surface so that it may extend in the width direction of the said backing material component. Backing material for welding.   The welding backing material according to any one of claims 1 to 9, wherein the concave portion has an elliptical arc shape whose side surface is centered on a minor axis.   The welding backing material according to claim 13, wherein the ellipticity of the elliptic arc of the recess is 0.857 to 0.95. The backing material for welding according to claim 13 or 14, wherein the maximum depth of the recess is 0.5 to 2.0 mm. Either side part of the said connection sheet | seat is overhanging from the both ends of the longitudinal direction of the said backing material component, It is any attachment part at the time of attaching the backing material for welding to a welding preform | base_material. Backing material for welding.

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