laying head ods
wire mill laying head
operational deflection shape analysis
in a wire mill, a laying head is used to deflect the wire moving in its axial direction and coil it in loops onto a roller conveyor. the laying head foundation is a large concrete block. the laying head gearbox is inclined from the horizontal and is driven by a motor at right angles to the direction of the wire. the wire enters the hollow center shaft of the gearbox and is pushed through a progressively curved pipe until it emerges from the laying head as a coil.
in the ods of a laying head shown below, the wire is moving from upper left to lower right. the motor is to the lower left. the frequency of this shape is about 25 hertz.
one of the most interesting features of this analysis is the dynamic angular misalignment between the motor and the gearbox.
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updated: january 2, 1998