Method for theoretically calculating roundness error of ring piece in rolling process of ring piece

Abstract

The invention discloses a method for theoretically calculating the roundness error of a ring piece in the rolling process of a large ring piece. The method comprises the following steps that (1) radial rolling process parameters of the ring piece are obtained; 2) calculating the force of a roller on the ring piece in the rolling process of the ring piece based on a slip line theory; 3) calculating the maximum bending moment of the ring piece; 4) setting the rolling rigidity condition of the ring piece; 5) calculating the bending angle of the ring piece; (6) calculating the contact arc length of a core roller of the bent ring piece and the ring piece; 7) calculating the roundness error of the bent ring piece; and (8) the ring piece roundness error ei corresponding to the current rolling time of the ring piece is output. According to the method, the relation between the bending degree of the ring piece and the bending moment, the rolling force and the size of the ring piece is analyzed, the radial and axial feeding strategy is adjusted according to the calculation result, and therefore the bending degree and the roundness error of the ring piece are controlled, and the purpose of controlling the roundness error of the ring piece is achieved.

Description

technical field [0001] The invention relates to the field of ring processing, in particular to a method for theoretically calculating ring roundness errors in the ring rolling process. Background technique [0002] Large-scale rings are widely used in aerospace, energy, automobile, shipbuilding, chemical and other industrial fields. During the rolling process of large-scale rings, when the stiffness conditions of the radial deformation zone of the ring cannot be satisfied, the radial deformation zone of the ring will produce plasticity. Instability, the ring bends, the stress on the ring and the roundness of the ring change, resulting in an ellipse, and the problem that the roundness of the ring is difficult to control during the rolling process. Contents of the invention [0003] The purpose of the present invention is to provide a theoretical calculation method for ring roundness error in the ring rolling process, so as to adjust the radial and axial feed strategy, so as...

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Problems solved by technology

[0002] Large-scale rings are widely used in aerospace, energy, automobile, shipbuilding, chemical and other industrial fields. During the rolling process of large-scale rings, when the stiffness conditions of the radial deformation zone of the ring cannot be satisfied, the r

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