Apparatus for crack splitting an annular part

B - Operations – Transporting – 23 – D

Patent

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Details

B23D 31/00 (2006.01)

Patent

CA 2298698

The invention relates to a device for fracture-separating an annular piece, such as a connecting rod (2). This connecting rod (2) has one stationary and one mobile expandable jaw (8, 10), for inserting into the borehole formed by the annular piece, and an expanding device for separating the expandable jaws (8, 10). The invention is characterized in that the fracture behaviour of the device can be influenced. To this effect, the peripheral surface of the expandable jaws (8, 10) is so configured that the expandable jaws (8, 10) engage in the inner surface of the borehole only via a region of reference surfaces or lines which is defined locally with precision.

Dispositif de séparation par rupture d'une pièce annulaire, par exemple d'une bielle (2), comprenant une mâchoire extensible fixe et une mâchoire extensible mobile (8, 10) venant s'insérer dans l'alésage formé par la pièce annulaire, et un dispositif d'écartement pour séparer lesdites mâchoires (8, 10), dispositif dans lequel on cherche modifier le comportement à la rupture. A cet effet, l'invention est caractérisée en ce que la surface périphérique des mâchoires extensibles (8, 10) est réalisée de telle façon que les mâchoires viennent en prise dans la surface intérieure de l'alésage, uniquement par une zone de surfaces partielles ou une zone linéaire déterminée localement avec précision.

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