| 摘要 |
<p>A method and apparatus for manufacturing the screw flight section of a screw conveyor is disclosed. The apparatus includes two horizontal arms which extend from a vertical support and at the terminal end of these arms there are dies for engaging the inner and outer peripheral edges of a flat, sheet metal, annulus-shaped blank with a radial slit. One die is turned on its longitudinal axis while the other remains stationary so that the blank is twisted. After the blank is circumferentially displaced relative to the dies, it is again twisted in the above described manner. This procedure is repeated around the entire circumference of the blank with the result that a helical form is applied to the blank.</p> |
