| 摘要 |
PURPOSE:To form a fluid conduit hole having a desired diameter in a structure by diffusing and joining a backing consisting of a meltable material into a metallic material to form the shape of the structure body and heating the same then forcing fluid into the packing from one end thereof while the packing is held melted. CONSTITUTION:Grooves 2, 2' are bored to the parting planes of divided pieces 1, 1' of the metallic material and the packing 3 consisting of the meltable material such as NaCl is packed therein. The pieces 1, 1' are mated and metallic plugs 4 are mounted to the exposed ends on the outside surface of the packing 3. The exposed boundary of the joined material is seal-welded 5 to integrate the material. The plugs 4 of the structure A contg. such packing 3 are removed and the structure is heated to the m.p. of the packing 3 or above to hold the packing 3 melted. Compressed air or the like is introduced into the packing 3 from one open end thereof and the molten packing 3 is discharged from the other open end to form the through-hole. Water or the like is passed into such through-hole to elute the remaining packing. The cured and small-diameter fluid conduit hole is easily formed by the above-mentioned method.
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