METHOD OF MANUFACTURING LIGHT ROTOR SHAFT FOR ECO-FRIENDLY VEHICLES

摘要

A method of manufacturing a light rotor shaft for eco-friendly vehicles is provided which includes cutting a pipe material in a specified length to provide a pipe blank and forming the pipe blank to provide a first form having the first segment on a first side. The method further includes, forming a second form having the second segment by inserting and rotating a first side of a mandrel into the first side of the first form and concurrently hammer-forging the second side of the first form to form the second segment. The rotor shaft includes a third segment formed by inserting and rotating the second side of the mandrel into the first side of the second form to form the third segment.

主权项

1. A method of manufacturing a light rotor shaft for eco-friendly vehicles, wherein the rotor shaft includes a hollow main body longitudinally divided into first, second, and third segments, and inner diameters of the first and third segments are less than an inner diameter of the second segment, the method comprising:
cutting a pipe material in a specified length to form a pipe blank; forming the pipe blank to provide a first form having the first segment on a first side; forming a second form having the second segment by inserting and rotating a first side of a mandrel into the first side of the first form towards the first segment and hammer-forging the second side of the first form to form the second segment; and forming the rotor shaft having the third segment by inserting and rotating the second side of the mandrel into the first side of the second form towards the second segment to form the third segment.