JPS6192721A - Production of cooling panel - Google Patents

Abstract

PURPOSE:To produce inexpensively the cooling panel of large size, bend work resistant and having high leak resisting reliability by burying a core made of non-ferrous substance having the same dimension as of a groove provided on a base plate into said groove and removing the core after forming the upper plate with a build-up welding. CONSTITUTION:A groove 3 is formed on a base plate 1 and a core 5 consisting of a nonmetallic substance (graphite, etc.) having the section equal or below equal to the shape of said groove 3 is buried therein. And after forming an upper plate 6 with build-up welding from thereon, the upper plate 6 is cut to make a smooth surface 7. The core 5 is then removed and the inner face 8 of the passage thereof is cleaned with feeding a pressurizing fluid body therein and the necessary hollow panel is produced. The core 5 is made to be removed easily with providing thereon a torsion plate 9, etc.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a cooling panel.

[Conventional technology]

Conventionally, as a manufacturing method for a cooling panel, that is, a cooling plate L5 shown in FIG. 5 having a cavity 2 in a predetermined direction within a flat plate, one (or both may be used) of the substrate 1 as shown in FIG.
A groove 5f of a predetermined shape is provided in advance, and the other plate 4 is stacked,
Diffusion bonding (heating and pressure bonding in a vacuum) or a method of interposing a brazing material between the two members has been used.

However, as a manufacturing method for large-scale components that cannot be allowed to leak, such as nuclear fusion, there are the following six drawbacks.

First, in the case of diffusion bonding, when a large panel with a width of 11 or more and a length of 5 m or more is used, a large vacuum heating furnace and a large-load pressurizing mechanism are required, resulting in high equipment costs and manufacturing costs. ■ A method of sealing and welding the four circumferences of both parts and then vacuuming the inside and heating and pressurizing it in the atmosphere has been considered, but productivity is low. ■ Oxidation and dirt on the bonding surface can easily cause bonding defects. Therefore, when subjected to the bending process in the post-process, the defect will be enlarged and the leak resistance reliability will be lacking.

Next, in the case of brazing, vacuum brazing and atmosphere brazing are employed as high-grade brazing methods, which require large equipment and are expensive in equipment and manufacturing costs. ■The joint becomes a surface joint, and the occurrence of defects such as the formation of pores and poor rolling times are unavoidable. ■With a groove 5, cracks are likely to occur if the material is able to withstand the bending process in the post-process.

[Problem that the invention seeks to solve]

The object of the present invention is to provide a cooling panel manufacturing method that overcomes the drawbacks of the conventional methods described above, that is, it is large in size, can withstand bending, has high leak resistance reliability, and can be manufactured at low cost with simple equipment.

[Means for solving problems]

In the present invention, a core made of a non-metallic material having a size equal to or slightly smaller than the size of the groove is embedded in a groove provided in a substrate, and after forming an upper plate 19 by overlay welding, the core is The present invention relates to a method of manufacturing a cooling panel, which comprises removing.

[For production]

The method of the present invention will be explained below based on the drawings.

FIG. 1 is an explanatory diagram of the manufacturing process of a cooling panel according to the method of the present invention. In FIG. 1, (a) is a perspective view showing the arrangement relationship between the member provided with #l and the core, and (b) is
A perspective view showing a member with a core embedded in the groove and then visually welded from above, (c) is a perspective view showing the next state after the overlay contact area has been smoothed by cutting etc., and (b) is a perspective view showing the next state. FIG. 7 is a perspective view showing a state in which the inner surface of the passage is F-clean for supplying pressurized fluid after removal.

Mayu, Figure 2 is a schematic diagram showing a specific example of the core to facilitate the removal work when removing the core.
FIG. 4 and FIG. 4 are sectional views showing other specific examples to which the present invention is applied.

In the figure, the reference numeral 1.5 is the same as in FIGS. 5 and 6, and the other symbols are as follows.

5: Core made of non-metallic material, 6: Other parts formed by overlay bath welding, 7: Smoothed surface of other parts, 8: Inner surface of passage, 9: Core material for removing the core ( 9 screw plates, a twisted line shape is preferable in terms of core removability in the subsequent process), 10: 9-grain core that is solidified after F-embedding in the caking material, 11: 5 grooves are processed on the metal thin plate substrate 1, A core 5 made of a non-metallic material (formed in advance with graphite, clay, gypsum, etc.) having an lFr surface equal to or less than the shape of the groove 5 is buried (Fig. 1 (a)), Overlay welding on top of that to create the upper plate 61F! : Form (Figure 1 (b)). Next, the upper plate 6 is cut to obtain a smooth surface 7 (Fig. 1 (c)).
. Thereafter, the core 5 is removed and a pressurized fluid is supplied to clean the inner surface of the passage 8' to complete the hollow panel (see FIG. 1).

As described above, since the present invention is a build-up welding method, it can be carried out using inexpensive equipment, and the joint strength is high, so there is no risk of problems such as peeling even during bending processing in subsequent steps. Well,
Since the core 5 is buried in the groove 3 during welding in the build-up bath, the weld metal does not sag easily and a smooth passageway on the inner surface is obtained. Furthermore, since the core 5T is made of a nonmetallic material, especially a material with a high melting point, there is no fear of fusion with the weld metal. The primary conductor is a 5t core made of graphite, and by using a material mixed with a conductor, it is possible to prevent arc breakage during welding, create a stable arc, and create a uniform overlay bath. Connections can be constructed. As shown in the specific example shown in FIG. 4, it is also possible to ensure the stability of the arc and the smoothness of the inner surface by laying a thin metal plate 11 before overlay welding.

Overlay bath welding can be carried out by ordinary compensated arc welding, inert gas arc welding, plasma welding, etc., but it can be carried out with higher efficiency if the filler metal is in the form of a wire or rod (=9 plates). In addition, when embedding the core 5, prepare in advance a core with a cross section that is equal to or less than the shape of the groove 3, but in the concrete example shown in Fig. 5, a caking agent is mixed. It is also possible to solidify the nonmetallic powder after embedding it in the groove.

To remove the core 5 after contact with the overlay bath, as shown in FIG. By pulling out the 19 core 5, most of the core 5 can be easily carried out, and a through hole is formed at the end. Furthermore, by supplying pressurized fluid (air or water) from one end of the opening, the core material remaining on the inner surface 8 of the passage is completely removed and carried out to smooth the inner surface 8 of the passage. can do. Incidentally, the surface of the overlay metal is smoothed by cutting or the like, but this can be done either before or after removing the core.

〔Effect of the invention〕

By the method of the present invention, a cooling panel that is large in size, can withstand bending, has high leak resistance reliability, and can be manufactured at low cost using simple equipment.

[Brief explanation of drawings]

FIG. 1 shows the manufacturing process of a cooling panel according to the method of the present invention, and FIG. 2 shows a specific example of a core to facilitate removal of the core. FIGS. 3 and 4 each show other specific examples to which the present invention is applied. FIG. 5 is a perspective view showing a partial cross section of the cooling panel, and FIG. 6 is a diagram showing the shape of the member before conventional diffusion bonding or brazing. Sub-agent 1) Meifuku agent 1 Ryo Hagihara − Ryo 1 figure

Claims (1)

[Claims] A core made of a non-metallic material with dimensions equal to or slightly smaller than the dimensions of the groove is buried in a groove provided in the substrate, and after forming an upper plate by overlay welding, the core is removed. A method for manufacturing a cooling panel.