Method of manufacturing cast product and forged product with insert joined thereto
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakehiro Ito
Life of this patent
Estimating the term…
Abstract
An insert including a taper is covered with a molten metal. A metal molded product with the insert joined thereto is generated by semi-cooling the molten metal to a press-fitting temperature which is higher than a recrystallization temperature of the molten metal and lower than a melting point of the molten metal. A fitting hole which is filled with the insert is formed in the metal molded product. The taper is fitted into the fitting hole. An undercut is not formed in front of a tip of the taper. The insert is press-fitted into the fitting hole while pressing and extending the fitting hole with the taper in a thinning direction of the taper at a press-fitting temperature. The metal molded product is further cooled with the press-fitting maintained.
Claims10
A method of manufacturing a cast product with an insert joined thereto, the method comprising:
- covering an insert, which is formed of a first material which is a metal or nonmetal and which includes a taper, with a molten metal which is formed of a second material which is a metal;
- generating a cast product which is formed of the second material by semi-cooling the molten metal to a press-fitting temperature which is higher than a recrystallization temperature of the second material and lower than a melting point of the second material, a fitting hole which is filled with the insert being formed in the cast product, the taper being fitted into the fitting hole, and an undercut not being formed in front of a tip of the taper;
- press-fitting the insert into the fitting hole of the cast product while pressing and extending the fitting hole with the taper in a thinning direction of the taper at the press-fitting temperature, the thinning direction being a press-fitting direction;
- and
- further cooling the cast product while maintaining the press-fitting.
A method of manufacturing a forged product with an insert joined thereto, the method comprising:
- shaping a matte by pressing the matte with a mold at a forging temperature which is higher than a recrystallization temperature of the matte and lower than a melting point of the matte;
- forming a fitting hole which is filled with an insert with a taper by press-fitting the insert into the matte at the forging temperature, the taper being fitted into the fitting hole;
- generating a forged product formed of the matte by semi-cooling the matte to a re-press-fitting temperature which is higher than the recrystallization temperature of the matte and lower than the forging temperature;
- re-press-fitting the insert into the fitting hole of the forged product n in a thinning direction of the taper while clamping the periphery of the fitting hole of the forged product with the mold and pressing and extending the fitting hole with the taper at the re-press-fitting temperature;
- and
- further cooling the forged product while maintaining the re-press-fitting.
Dependencies are inferred from the claim text.