Method for manufacturing shaft
AssigneeSanjo Machine Works, Ltd.
InventorsHiroyuki Kariya, Takahiro Sekine, Fumihiko Hattori, Kazushi Goi, Ryo Kurosawa
Life of this patent
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Abstract
In a method for manufacturing a shaft, and surfaces of a pair of metal sheets are polished, and the metal sheets are each bent into a cylindrical or arcuate shape. The polished end surfaces of the metal sheets are butted together with the end surfaces facing each other. The butted end portions are diffusion-joined, thereby forming a cylindrical member. The cylindrical member is cooled, and ends of the cylindrical member are joined to linking members to form the shaft.
Claims10
A method for manufacturing a shaft, comprising:
- comprising
- polishing end surfaces of a pair of metal sheets to a surface roughness Ra of 2 μm or less;
- bending each metal sheet of the pair of metal sheets into a semicylindrical shape;
- disposing the pair of the metal sheets that are bent into a semicylindrical shape together so as to form a cylindrical shape by butting together the polished end surfaces of the metal sheets, and then heating the butted portions so that the butted portions are diffusion-joined, thereby forming the cylindrical member;
- cooling the cylindrical member;
- joining linking members to ends of the cylindrical member to form the shaft;
- and
- cutting or polishing the inner surfaces of the butted portions of the cylindrical member,
- wherein in the forming of the cylindrical member, parallel and horizontally disposed end surfaces of the pair of semicylindrical metal sheets are directly butted together, and entireties of the end surfaces are diffusion-joined while pressurized so as to be pressed together in a direction orthogonal to the end surfaces.
A method for manufacturing a shaft, comprising:
- polishing end surfaces of a pair of metal sheets;
- bending each metal sheet of the pair of metal sheets into a semicylindrical shape;
- disposing the pair of the metal sheets that are bent into a semicylindrical shape together so as to form a cylindrical shape by butting together the polished end surfaces of the metal sheets, and then heating the butted portions so that the butted portions are diffusion-joined, thereby forming the cylindrical member;
- cooling the cylindrical member;
- and
- joining linking members to ends of the cylindrical member through friction welding or shrink-fitting during the cooling to form the shaft,
- wherein in the forming of the cylindrical member, parallel and horizontally disposed end surfaces of the pair of semicylindrical metal sheets are butted together, and entireties of the end surfaces are diffusion-joined while pressurized so as to be pressed together in a direction orthogonal to the end surfaces.
Dependencies are inferred from the claim text.