JPS633760Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a backing material used for single-sided welding of various structures.

Generally, when building structures by welding in shipbuilding, architecture, bridges, etc., it is often impossible to weld both sides. For this reason or for the purpose of saving labor in the welding process, single-sided welding is widely practiced. A backing material is used in this single-sided welding to form a uranami bead, but solid backing materials made of lightweight short materials and glass fiber-like tape backing materials are often used as backing materials for simple single-sided welding. ing.

The present invention relates to an improvement of a solid backing material in which tile-shaped solid backing materials are continuously arranged in the longitudinal direction and adhered to a tape. Since this backing material as a whole has flexibility in the longitudinal direction, it has the advantage that it can be applied even to curved surfaces to be welded. The conventional backing material of this type is Jikoko 44-
Disclosed in Publication No. 5958 or Special Publication No. 57
-22680, etc., but although the former has good flexibility, when it is applied to a curved material to be welded, the distance between the tile-shaped solid backing materials is too wide, resulting in molten slag. The latter has the disadvantage that the solid backing material tends to run off easily, and the latter has the disadvantage that processing of the solid backing material is complicated and manufacturing costs are high.

The present invention solves the drawbacks of the prior art, and its gist is to create a tile-shaped continuous tape in the longitudinal direction of the backing material mounting tape made of a wide flexible heat-resistant material. In a backing material for single-sided welding formed by pasting a heat-resistant solid backing material, the mutually contacting end surfaces of the solid backing material consist of a lower surface perpendicular to the longitudinal direction of the backing material and an inclined upper surface.

The present invention will be explained below using specific examples shown in the drawings. Figure 1 is an overall perspective view of a specific example of the present invention;
The figure is a side view. 1 is a solid backing material such as a heat-resistant ceramic tile, and has a recessed portion in the longitudinal direction at the center of the surface (the surface in contact with the groove). 2 is a backing material attachment tape made of a flexible heat-resistant material, such as Al foil, for attaching the solid backing material to the back surface of the groove of the material to be welded, and is configured to have a wider width than the solid backing material 1. . The tape 2 is coated with adhesive on one side, and the solid backing material 1 is continuously arranged and pasted in the longitudinal direction of the tape 2,
Also, a peeling tape 3 is attached to both ends in the longitudinal direction to be peeled off when using the backing material. As shown in the figure, the peeling tape is preferably attached to the tape 2 so that a portion thereof protrudes, thereby making it easier to peel off.

As shown in FIG. 2, the end surface of the solid backing material of the present invention is composed of a lower surface 4 perpendicular to the longitudinal direction of the backing material and an inclined upper surface 5. In this specific example, the end surface of the upper surface 5 is In order to prevent the tip from chipping, the tip is formed with a vertical surface 5'. FIGS. 3a and 3b are views showing a specific example of the present invention in use, and the materials to be welded are not shown. Figure 3a shows the case when the material is applied to a material with a convex curved surface, and FIG. 3b shows the case when it is applied to the material to be welded with a concave curved surface. , and when a conventional backing material with a vertical end surface is used as shown in b, even if the space between the solid backing materials is too wide and the molten slag flows down, according to the present invention, the slanted upper surface 5 prevents the molten slag from flowing down. It does not run down and forms a good Uranami bead.

As described above, if the backing material for single-sided welding of the present invention is used, an excellent uranami bead can be obtained because it has good flexibility and a good slag retention function between the solid backing materials. Furthermore, since the end portion has a simple shape, it is easy to process. .

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing a specific example of the backing material of the present invention, FIG. 2 is a side view, and FIGS. 3 a and 3 b are views of the present invention in use. 1... Solid backing material, 2... Flexible heat-resistant material, 3...
...Tape for attaching backing material, 4...Bottom surface, 5...Top surface, 5'...Vertical surface.

Claims (1)

[Scope of utility model registration request] In a single-sided welding backing material in which a tile-shaped heat-resistant solid backing material is continuously attached in the center longitudinal direction of a backing material mounting tape made of a wide flexible heat-resistant material, the solid backing material is A backing material for single-sided welding, characterized in that end surfaces that touch each other consist of a lower surface perpendicular to the longitudinal direction of the backing material and an inclined upper surface.