Process for laser rounding and flattening of cylindrical parts

C - Chemistry – Metallurgy – 21 – D

Patent

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Details

C21D 10/00 (2006.01) B21D 3/16 (2006.01) C21D 7/06 (2006.01) C21D 9/32 (2006.01) C21D 1/09 (2006.01) C21D 1/10 (2006.01) C21D 1/30 (2006.01) C21D 9/40 (2006.01)

Patent

CA 2615916

A method is disclosed for rounding and/or flattening an annular part that is out of round and/or not flat due to non-uniform internal stresses. The part is first checked for out of round and/or out of flat conditions. Out of round parts are then rounded by introducing compressive stresses into selected surface sections of the part whereby the introduced compressive stresses cause deformation of the annular part thereby rounding the annular part. Alternatively, out of round parts are rounded by relieving compressive stresses in selected surface sections of the part whereby the relieving of compressive stresses causes deformation of the annular part thereby rounding the annular part. Out of flat parts are flattened by introducing compressive stresses into selected surface sections of the part whereby the introduced compressive stresses cause deformation of the annular part thereby flattening the annular part. Alternatively, out of flat parts are rounded by relieving compressive stresses in selected end surface sections of the part whereby the relieving of compressive stresses causes deformation of the annular part thereby flattening the annular part.

La présente invention concerne un procédé permettant l~arrondissement et/ou l~aplatissement d~un élément annulaire n~étant pas parfaitement circulaire ou plane en raison de contraintes internes non uniformes. L~élément est en premier lieu contrôlé quant à son caractère non circulaire et/ou non plane. Les éléments ne s~avérant pas parfaitement circulaires sont arrondis par création de contraintes de compression sur des zones de surface sélectionnées afin d~entraîner une déformation de l~élément annulaire en vue de rendre ce dernier parfaitement circulaire. Sinon, les éléments ne s~avérant pas parfaitement circulaires sont arrondis par élimination de contraintes de compression sur des zones de surface sélectionnées afin que la déformation résultante permette de donner un caractère circulaire à l~élément. Les éléments n~étant pas parfaitement planes sont aplanis par création de contraintes de compression sur des zones de surface sélectionnées afin d~entraîner une déformation de l~élément annulaire en vue de rendre ce dernier parfaitement plane. Sinon, les éléments n~étant pas parfaitement planes sont aplanis par élimination de contraintes de compression sur des zones de surface sélectionnées afin que la déformation résultante permette de donner un caractère plane à l~élément.

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