System for monitoring a pilger wall
AssigneeGeneral Electric Company
InventorsMichael K. Cueman, Bahram Keramati, George C. Sogoian, John J. Kaehler, Paul B. Tuck, James W. Clark, Steven R. Hayashi
Life of this patent
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Abstract
A system and method for monitoring a pilger mill having a crankshaft driving rolls with a reciprocating motion to reduce a tube over a mandrel. A linear sensor coupled to the mandrel supplies a mandrel position signal. A rotary sensor coupled to the crankshaft supplies a crankshaft angle signal. A processor for combining the mandrel position signal and the crankshaft angle signal provides a mandrel motion signal characteristic of the tube reduction.
Claims25
A system for monitoring a pilger mill including a crankshaft driving rolls with a reciprocating motion to cyclically process a tube over a mandrel, the system comprising:
- a sensor, operatively connected to the mandrel, for determining a mandrel position signal;
- a sensor, operatively connected to the crankshaft, for determining a crankshaft angle signal;
- and
- a processors, operatively connected to the mandrel position signal sensor and the crank shaft angle signal sensor, for combining the mandrel position signal and the crankshaft angle signal and for providing an output such that when outputs from at least two cycles of the mill are uniformly displayed, the tube is being processed in a substantially uniform manner to substantially uniform size.
A method for monitoring a pilger mill which includes crankshaft driving rolls with a reciprocating motion to cyclically process a tube over a mandrel having a free end comprising the steps of:
- providing a mandrel position signal correlated with an axial position of the mandrel;
- providing a crankshaft position signal correlated with an angular position of the crankshaft;
- and
- processing the mandrel position signal and the crankshaft position signal to provide a mandrel motion signal representative of the mandrel free end position so that when the mandrel motion signal from at least two mill cycles are uniformly displayed, the tube is being processed in a substantially uniform manner to a substantially uniform size.
A system for producing a tube having a substantially uniform size, the system comprising:
- a pilger mill including a feed carriage and an entry chuck;
- at least two rotating and reciprocating spaced, grooved rolls;
- a mandrel die having a predetermined rest position, operatively positioned relative to the rolls, for elongating the tube as the mandrel die elongates and contracts so that the entire circumference of the tube is reduced between the rolls and the die;
- and
- means, operatively connected to the rolls and the mandrel die, for determining a pattern representation of the elongation and contraction of the mandrel die relative to the predetermined rest position.
Dependencies are inferred from the claim text.