| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of joining hardly joinable metallic parts which is capable of joining metallic parts consisting of a hardly joinable metal, such as a nickel-titanium alloy, with sufficient joining strength even if a joining area is small. SOLUTION: The method of joining the hardly joinable metallic parts comprising joining the two hardly joinable metallic parts of a spectacle frame to each other has a process step of forming a hollow section having a broad section and a narrow section in the first hardly joinable metallic parts, a process step of forming a base 12 by plastically deforming a third joining member 10 formed of the same material as the material of the second hardly joinable metallic parts by pressure and occluding and fixing the same to this hollow section and a process step of directly joining the second hardly joinable metallic parts to the base 12. Accordingly, the spectacle frame which produces the sufficient joining strength and does not therefore give rise to an allergic symptom and the dislodgment of the parts can be provided. |
