| 摘要 |
An apparatus for manufacturing split pulleys includes a frame and a spindle assembly supported by the frame and having an upper and lower spindle for supporting for rotation a blank to be split therebetween. The lower spindle includes a clamping mechanism having a screw means for drawing the upper spindle toward the lower spindle and the lower spindle toward the upper spindle to clamp the blank to be split therebetween. Bearing means are disposed between the frame and the spindle assembly for supporting the spindle assembly for rotation. The clamping means are operative to exert a clamping force between the upper and lower spindles which is isolated from the frame and the bearing means to clamp a blank therebetween. A pair of rotatable tools are provided each of which has an axis of rotation parallel to the axis of rotation of the spindle assembly and each of which is associated with a motor means to effect rotation of the tools. The tools are operable to move relative to the blank supported by the spindle assembly to effect sequential engagement between the tools and the peripheral edge of the blank to sequentially split and form the blank. Control means is provided for controlling the speed of the spindle to match the peripheral speed of the rotating blank supported by the spindle with the peripheral speed of the tool with which it is desired to engage the blank. The control means senses the speed of the first tool to be engaged with the rotating blank and controls the speed of the spindle in response to the speed of the first tool and subsequently senses the speed of the second tool to be engaged with the blank and controls the speed of the spindle in response to the speed of the second tool. The speed control of the peripheral speed of the tools and the rotating blank prevents skidding of the tools upon initial engagement of the blank with the tools. |
