| 摘要 |
PURPOSE: To mechanically work a belt pulley by the minimum input by managing a metallic disk so that the peripheral part of the metallic disk where is profiled into a waveform becomes the waveform having the upper limit of the waves at both radial ends and the lower limit of the adjacent waves right and left at the inside to be the optimum material distribution to working. CONSTITUTION: Waveform copying of the outer extended circumferential part 11 of the metallic disk 1 having a central hub 10 is executed with a forming roller 21. The peripheral part 11 is inwards bent into a curved shape and, as the end of the outer periphery is approached, its thickness increases. Next, the peripheral part 11 of the metallic disk 1 is worked using the roller 22. The peripheral part 11 of the metallic disk 1 shows a wave-shaped cross section having the upper limits 12, 12' of waves at both ends which are formed radially toward the outside and the lower limits 13, 13' of the adjacent waves right and left at the inside. In this way, the stability of the belt pulley on the periphery of the hub is increased and the high-quality belt pulley is manufactured at low cost. |
