JPS55141328A - Deformation correcting method of three-dimensionally shaped object - Google Patents

Abstract

PURPOSE: To measure and correct the deformation of a three-dimensionally shaped object mechanically and efficiently by comparing the coordinate values of the section measurement values of arbitrary positions of the three-dimensionally shaped object and its model and controlling the resulted deformation amounts.

CONSTITUTION: In order to correct the torsional deformation amount of a work 1, a reference part 3 is clamped to a reference plane 22, after which the correcting sectional position is clamped G. Next, in this state, the torsional correction of the arbitrary section being clamped G is accomplished by rotating the plane 22. Next, in this state, torque is appied to the work 1 and is increased within the range that the deformation amount of the work 1 at the removing of the torque after it has exceeded the elastic limit of the work 1 does not exceed the torsional deformation amount θH. Next, the maximum torque T₂ and maximum deflection amount θ₂ of this time are detected respectively, after which the torque is removed and the permanent deflection amount θ₁ of the work 1 is detected. The proportional constant K of the work 1 is obtained from the formula I. Next, according to this constant K, the work is reloaded and the load removing point P which satisfies formula II. is detected and the load is immediately removed. Namely, the torque T and deflection amount θ are decreased by maintaining the inclination of the constant K from the point P and the point when the torque T becomes zero is made qual to the torsional deflection amount θH of the work 1 and this ends the correction.

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