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US 4,998,344 AGranted
Method of manufacturing a hub
OwnerKin Ho Hsiehinventor
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a hub includes the following steps: rotary swaging a workpiece to form a semi-product, the workpiece is simultaneously struck by three or more dies from the outer peripheral side so that the semi-product is formed smoothly and homogeneously, and two bearing cup seats are simultaneously formed on both ends of the semi-product; and squeezing both ends of the semi-product by a right mold and a left mold so as to form a hub. The hub is produced in a fast speed so that the productivity is greatly increased.
Claims1
A method of manufacturing a hub comprising:
- rotary swaging a workpiece which is substantially a cylindrical tube in order to form several semi-products thereon, said workpiece being swaged by at least three dies from an outer peripheral surface thereof, said dies striking or hammering said workpiece in a pulsating hammer-type action so that said semi-products are formed smoothly and homogeneously, and two bearing cup seats are formed on both ends of said semi-product;
- cutting said semi-products on said workpiece into each semi-product;
- squeezing both ends of each said semi-product, a center portion of said semi-product being stationarily embraced by an upper mold and a lower mold, both ends of said semi-product being reachable by a right mold and a left mold, and said both ends of said semi-product being squeezed by said right mold and said left mold when said right mold and said left mold move toward said upper mold and said lower mold.
Dependencies are inferred from the claim text.