Precision forming apparatus, method and article

B - Operations – Transporting – 21 – J

Patent

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Details

B21J 13/02 (2006.01) B21J 5/02 (2006.01) B21J 13/14 (2006.01) B21K 1/16 (2006.01)

Patent

CA 2103150

The apparatus comprises a die cavity (33) which conforms with the shape of a portion of a part to be formed, a punch (29) with a cavity having end walls which conforms (43, 44) with the shape of another portion of the part to be formed, and means for causing relative movement of the die and the punch. The blank (21) and the fitting (20) have a microstructure wherein substantially all of the grain is oriented parallel to the longitudinal axis thereof. The method comprises producing a billet (22) having a maximum dimension in a given direction less than X, placing the billet in the die (31), while the punch (29) and the die (31) are separated, so that punch/die relative movement will force the part of the billet having the maximum dimension less than X between the opposed walls where the cavity has the minimum lateral dimension of X, and causing relative movement between the punch and the die.

L'appareil comprend une cavité de matrice (33) qui épouse la forme d'une partie d'une pièce à former, un poinçon (29) avec une cavité ayant des parois d'extrêmité qui épousent (43, 44) la forme d'une autre partie de la pièce à former, et des moyens produisant un mouvement relatif entre la matrice et le poinçon. L'ébauche (21) et le raccord fileté (20) ont une microstructure dans laquelle pratiquement tous les grains sont orientés parallèlement à son axe longitudinal. Le procédé consiste à produire une billette (22) ayant une dimension maximale dans un sens donné inférieur à X, à placer la billette dans la matrice (31), le poinçon (29) et la matrice (31) étant séparés, de sorte que le mouvement relatif entre le poinçon et la matrice forcera la partie de la billette ayant la dimension maximale inférieure à X à passer entre les parois opposées où la cavité présente la dimension latérale minimum de X, et provoquer le mouvement relatif entre le poinçon et la matrice.

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