Method of manufacturing constituent member of constant-velocity joint
AssigneeJtekt Corporation
InventorsMotonori Nakao, Yohei Fukumoto, Koji Hamajima, Keiichi Kamata, Kenjiro Ikeda, Shintaro Yoshinaga
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Abstract
A method of manufacturing a constituent member of a constant-velocity joint includes: performing plastic working; and performing hardening of a material. The plastic working is performed with a material of the constituent member heated to a predetermined working temperature range. The hardening of the material is performed by utilizing heat applied for heating to the working temperature range in performing the plastic working as heat for the hardening of the material and cooling the material after performing the plastic working.
Claims14
A method of manufacturing a constituent member of a constant-velocity joint, comprising:
- heating a temperature of a material of the constituent member to a plastic working start temperature;
- performing plastic working on the material of the constituent member while the temperature of the constituent member decreases such that the temperature of the constituent member is at a hardening cooling start temperature immediately after the plastic working is completed;
- and
- performing hardening of the material by cooling the material from the hardening cooling start temperature after performing the plastic working,
- wherein the plastic working start temperature is between 900° C. and 1050° C., and
- wherein the hardening cooling start temperature is greater than or equal to a transformation point of the material of the constituent member.
A method of manufacturing a constituent member of a constant-velocity joint, comprising:
- heating a temperature of a material of the constituent member to a plastic working start temperature;
- performing plastic working on the material of the constituent member while the temperature of the constituent member decreases from the plastic working start temperature such that the temperature of the constituent member is greater than or equal to a transformation point of the material of the constituent member immediately after the plastic working is completed;
- cooling the material of the constituent member to room temperature after the plastic working is completed;
- performing hardening of the material of the constituent member by heating the material of the constituent member to a hardening start temperature and then cooling the material of the constituent member to room temperature;
- applying a paint to the material after performing the hardening;
- heating the material to a predetermined drying temperature after applying the paint to dry the paint;
- and
- performing tempering of the material by keeping the material at the drying temperature for a predetermined tempering time and then cooling the material,
- wherein the hardening cooling start temperature is greater than or equal to the transformation point of the material of the constituent member.
Dependencies are inferred from the claim text.