摘要 |
A method for manufacturing a one end flange less wheel rim includes the steps of: providing a sheet of rim material having a width substantially corresponding to the developed width of a one end flange less wheel rim to be made, curving the sheet to form a cylinder (11), flaring one end of the cylinder (11), roll-forming the flared cylinder to the desired rim configuration using roll-forming machines each including an upper roll (19), a lower roll (20) and a ring (18), with the flange less side end (16) of the rim material being axially abutted against the ring, and removing a margin (α) for machining from the flange less side end of the rim material. In the apparatus, the ring (18) is coupled to one of the upper roll (19) and the lower roll (20). |