Cassette Rafted Roll Forming Machine
The mill has a bed on which the drive is located and the interchangeable plates are placed. Each plate is holding 2 stands. Both the operator-side and the drive-side stands are typical operator-side-type stands, complete with shafts and tooling. The drive-side stands have larger bearing blocks to accommodate pairs of cone bearings which rigidly hold the shafts in position during the operation and when the operator-side stand is removed for occasional roll change.
To allow quick plate (profile) change, the drive must have quick disconnect/connect feature. To further reduce the changeover time, only the bottom shafts are usually driven by the drive train firmly attached to the bed. All or some of the upper shafts can be driven by gears located at the drive-side end of the mill shafts.
The plates (rafts) must be accurately located on the mill bed. At the same time, provide accurate shoulder alignment. Two stops at the drive side of the bed for the longer side of the plate and one stop at each short side are sufficient for accurate location.