Hobble turning method and preferred applications of the method

Details Hobble turning method and preferred applications of the method Hobble turning method and preferred applications of the method

G - Physics

05

B

G05B 19/18 (2006.01) A61F 2/34 (2006.01) B23B 1/00 (2006.01) B23B 5/18 (2006.01) B23B 5/46 (2006.01) G05B 19/4093 (2006.01)

Patent

CA 2375548

The invention relates to a method for machining workpieces with a non-round or inconstant contour on usual commercial programmable turning machines. According to the invention, the application and combination of a programming, consisting of threading cycles and rising and falling values for the diametral and longitudinal axis or of the gradient, of a pilger step technique and of interlaced machining sequences, have almost unlimited possibilities. Preferred applications of the inventive method include the production of special screw threads on screw-in bodies e.g., on plastic hip cups or bone screws, e.g. with neutral angles or almost any clamping angles or clearance angles of the thread flanks, as well as the production of e.g., inner and outer contours on workpieces for so-called circular wedgings

L'invention concerne un procédé d'usinage de pièces à contour non rond ou irrégulier, par enlèvement de copeaux, sur des tours programmables d'usage courant. Selon l'invention, l'utilisation et la combinaison d'une programmation de cycles de filetage et de valeurs de sauts pour l'axe diamétral et longitudinal, c.-à-d. du pas, d'une technique de pas de pèlerin, ainsi que des séquences d'usinage intercalées offrent un champ de possibilités quasi illimité. Les modes de réalisation préférés du procédé permettent d'obtenir des filetages spéciaux sur des corps à visser tels que des cavités cotyloïdes artificielles ou des vis à os avec par ex. des angles neutres, c.-à-d. quasiment tous les angles de blocage ou de déblocage des segments de filetage. L'invention permet également d'obtenir des contours intérieurs et extérieurs sur des assemblages réalisés par clavetage circulaire.

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