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US 2016/0107249 A1Published application
A shear
AssigneePrimetals Technologies, Limited
InventorsMichael CARTWRIGHT, Peter WOOTTON
Life of this patent
Estimating the term…
Abstract
A shear has a moveable blade assembly (7); a second fixed blade assembly; a first sensor (22) mounted on the first blade assembly; a second sensor (21) mounted on the second blade assembly; and a first sensor reference block (20) fixedly mounted relative to a fixed datum (23).
Claims15
A shear comprising:
- a first moveable blade assembly with a blade having a first edge;
- a second fixed blade assembly with a blade having a second edge facing to cooperate with the first edge to define the shear;
- a first distance sensor mounted on the first blade assembly and configured and aimed to measure distance to the second blade assembly;
- a second distance sensor mounted on the second blade assembly and configured and aimed to measure distance to the first blade assembly;
- and
- a first sensor reference block fixedly mounted relative to a fixed datum, and the first sensor being selectively movable to oppose the first sensor reference block.
3 more elements
A method of determining a blade gap in a shear;
- the shear comprising:
- a first moveable blade assembly with a blade having a first edge;
- a second fixed blade assembly with a blade having a second edge facing to cooperate with the first edge to define the shear;
- a first distance sensor mounted on the first blade assembly and configured and aimed to measure distance to the second blade assembly;
- a second distance sensor mounted on the second blade assembly and configured and aimed to measure distance to the first blade assembly;
- and
- a first sensor reference block fixedly mounted relative to a fixed datum and the first sensor being selectively movable to oppose the first sensor reference block;
- the method comprising:
- providing first stored reference data, measured relative to a first datum, for location of the second sensor and providing second stored reference data, measured relative to the first datum, for location of the first sensor reference block;
- providing third stored reference data, relative to a second datum, for location of the first sensor;
- and
- during one measurement period of a cutting cycle, using the first sensor to determine a distance to a cutting face of the second blade assembly and using the second sensor to determine a distance to a cutting face of the first blade assembly;
- in another measurement period of the cutting cycle, using the first sensor to determine a distance to the first sensor reference block;
- and
- in a controller, calculating a blade gap from the stored reference data and determined distances.
12 more elements
Dependencies are inferred from the claim text.