Process and apparatus for cutting up by shearing of elements of a nuclear installation
AssigneeCompagnie Generale des Matieres Nucleaires
InventorJean-Claude Schultz
Life of this patent
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Abstract
A process and apparatus for cutting up an element used in the construction of a nuclear installation for dismantling. The element is placed on a support and pushed toward a shearing tool having a blade pitch angle of 30.degree.. As the element is pushed, the blade performs a first shearing operation. Then a releasing stop controlled by a jack releases the element from the blade. Operation continues until the element is cut up.
Claims16
Process using a shearing tool for cutting a metallic element used in the construction of a nuclear installation for the purpose of dismantling, comprising the steps of:
- presenting and maintaining the element in front of a cutting edge of a blade comprising the shearing tool when the tool is in a working position, a pitch angle of the blade being approximately 30.degree.,
- simultaneously, pushing the element towards the cutting edge and manipulating the tool to carry out a first element shearing operation,
- at the end of the first shearing operation, drawing back the element from the shearing tool in a direction opposite movement of the element in said step of pushing the element towards the cutting edge and returning the tool to the working position, and
- repeating the preceding steps to carry out a number of shearing operations if necessary.
Apparatus for cutting a metallic element used in the construction of a nuclear installation for the purpose of dismantling, the apparatus comprising a support for receiving the element, the support being equipped with a blade comprising the shearing tool and controllable by control means, the apparatus also incorporating means for maintaining the element in front of a cutting edge of the blade, the blade being inclined by an angle of approximately 30.degree. with respect to the support, means for pushing the element towards the cutting edge, and means for drawing back the element from the shearing tool in a direction opposite advancement of the element by said pushing means.
A process for cutting a metallic element, comprising the steps of:
- (a) providing a tool reciprocable in a vertical direction, the tool comprising a blade provided with a cutting edge at a pitch angle of approximately 30.degree. with a first horizontal direction in which the blade extends;
- (b) laying the element on a horizontal support;
- (c) pushing the element towards the blade in the first horizontal direction, while guiding the element in a second horizontal direction perpendicular to the first horizontal direction;
- (d) lowering the blade through the element while maintaining a determined effort on the element towards the blade in the first horizontal direction and retaining the element in the second horizontal direction;
- (e) raising the blade above the element;
- and
- (f) repeating steps (c) to (e) if necessary, until cutting is completed.
An apparatus for cutting a metallic element, comprising a horizontal support, a tool comprising a blade provide with a cutting edge extending in the cutting direction at a pitch angle of approximately 30.degree. with a first horizontal direction in which the blade extends, means for reciprocating the tool in a vertical direction, means for pushing then maintaining the element towards the blade in the first horizontal direction with a determined effort, and means for guiding then retaining the element in a second horizontal direction perpendicular to the first horizontal direction.
Dependencies are inferred from the claim text.