TENSION REEL MANDRELS |
| During the process of cold rolling build-up of large coils of thin strip causes collapsing pressure. To meet these operational requirements, special collapsible reel mandrels have been designed with multiple pyramid sliding surfaces, integral with the mandrel shaft of alloy forged steel construction. The sliding surfaces are deposited with aluminum bronze material to minimize friction and facilitate maintenance free sliding surfaces. The segments are made of alloy steel, hardened and tempered, resulting in optimum strength, and long service life. The mandrel is provided with alloy steel gripper elements, hydraulically operated, ensuring effective grip during mandrel expansion. These tension reel mandrels are supported on rigid outboard bearing supports during rolling. |
| Magadh can also supply heavy duty Inverse Pyramid Mandrels. Cold Rolling of alloy steels like stainless steel demands extremely high winding tension and for such applications inverse pyramid tension reel mandrels are ideally suited. The multiple pyramid mandrel is made from a solid forged alloy steel shaft having higher section modulus which also acts like a pull rod. The mandrel shaft is axially actuated by means of a hydraulic cylinder which causes drum expansion/collapse. The segments are axially held by the gear shaft adopter, which permit radial movement of the segments when pushed by the wedge action of the pyramid. |
| |
|
|
