Hobble turning method and preferred application for said method

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/34 (2006.01) B23B 5/36 (2006.01) B23G 1/02 (2006.01) B23G 3/14 (2006.01) F16B 33/02 (2006.01)

Patent

CA 2316898

The invention relates to a method for cutting workpieces with a non-round or inconstant contour on usual commercial programmable turning machines. According to the invention, the application and combination of programmed threading cycles and rising and falling values for the diametral and longitudinal axis or the gradient, a pilger step technique and interlaced machining sequences has almost unlimited possibilities. A preferred application of the inventive method is the production of special screw threads on screw-on hip cups e.g., with almost any clamping, neutral or clearance angle of the thread wings. The invention can be used to produce an advantageous hip cup with thread wings consisting of displaced screw surfaces.

L'invention concerne un procédé d'usinage de pièces à contour non rond ou irrégulier, par enlèvement de copeaux, sur des tours programmables en usage dans le commerce. 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, ou le pas, une technique de pas de pélerin, ainsi que des séquences d'usinage intercalées offrent un champ quasi illimité de possibilités. Une application préférée du procédé permet d'obtenir des filetages spéciaux sur des cavités cotyloïdes artificielles insérables par vissage, par ex. avec quasiment n'importe quel angle de serrage, angle neutre ou angle de dépouille. L'invention permet d'obtenir une cavité cotyloïde particulièrement avantageuse avec des flancs de filet formés de surfaces de vissage décalées.

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