Method for machining free-form surface on elongated material
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTakuya Nakanishi, Nobuo Shimizu, Haruhiko Asaka, Kazuya Matano
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Abstract
After a free-form surface is machined on an elongated material 1 with a projection 3 and a blade root 4 held, the holding of the projection 3 is released to release strain generated during machining. Upon release of the holding, the entire elongated material 1 deforms, and the projection 3 moves from a holding position A to a strain-released position B. A re-holding position C obtained by correcting the position B by the deformation amount of the elongated material 1 due to the weight of the elongated material 1 is determined, and the projection 3 is held again at the re-holding position C for further machining the free-form surface on the elongated material 1.
Claims10
A method for machining a free-form surface on an elongated material having a first end region and a second end region with respect to a longitudinal direction, the method comprising:
- a step of holding the first end region and the second end region;
- a first machining step of machining the free-form surface on the elongated material with the first end region and the second end region held;
- a step of releasing holding of the first end region;
- a step of determining a re-holding position obtained by correcting a position of the first end region where a deformation amount of the elongated material derived from the machining of the free-form surface in the first machining step was corrected by releasing the holding of the first end region only by a deformation amount of the elongated material due to a weight of the elongated material;
- a step of holding the first end region again at the re-holding position;
- and
- a second machining step of further machining the free-form surface on the elongated material after holding the first end region again,
- wherein, in the step of determining the re-holding position, a position shifted from the position of the first end region after the holding of the first end region is released by the deformation amount is determined as the re-holding position.
Dependencies are inferred from the claim text.