Spinning type multiple roller forming machine.

摘要

In a multiple roller spinning machine for spinning one-piece vehicle wheels the roller holder (22) is capable of sliding in a direction parallel with the axis of spinning and has a hydraulic cylinder (41) which moves through its piston rod the holder horizontally thereby bringing the multiple rollers (34, 35, 36) sequentially in an operating position just above the wheel material (12) clamped between the dies (18 and 13) of the driving (17) and driven (15) spindles. Each roller is coupled to a control hydraulic cylinder (38, 39, 40) which drives through its piston the respective roller vertically between a retracted position and a drawing position where the roller is pressed against the periphery of the wheel material (12). According to another embodiment, the holder carries therein multiple rows of different forming rollers arranged radially about a common center such that the wheel material can be subject to drawing by multiple rollers simultaneously applied at different points about the material periphery.