Chuck

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 31/20 (2006.01)

Patent

CA 2419142

The chuck (10) is comprised of a chuck body (11) having an inner cone surface and a grip head (12) with a corresponding outer cone surface. The grip head (12) is subdivided into individual clamping jaws (21) by several separating slots, said clamping jaws being connected to the grip head (12) by means of elastic connecting elements (22). Recesses (25) are provided on the inner cone surface of the chuck body (11) at least in the peripheral area of each separating slot of the grip head (12), preferably also in the peripheral area of the apex line of each clamping jaw (21). Said recesses (25) have a peripheral extension which is greater than that of the separating slots of the grip head (12) or the apex region of the clamping jaws (21). The axial extension of the recesses (25) is at least identical to the largest overlap area of both cone surfaces. The recesses (25) are filled with a filling body (27), made of an elastic, compressible material, up to the imaginary inner cone surface. The filling bodies (27) are permanently connected to the chuck body (11).

L'invention concerne un mandrin (10) comprenant un corps de mandrin (11) pourvu d'une surface conique intérieure et d'une tête de serrage (12) dotée d'une surface conique extérieure correspondante. La tête de serrage (12) est divisée par plusieurs entailles en mâchoires de serrage individuelles (21), réunies par des éléments de liaison élastiques (22) pour former cette tête de serrage (12). La surface conique intérieure du corps de mandrin (11) comporte des évidements (25), au moins dans la zone circonférentielle de chacune des entailles de la tête de serrage (12), mais également de préférence dans la zone circonférentielle de la ligne de partage de chaque mâchoire de serrage (21). L'étendue circonférentielle de ces évidements (25) est supérieure à celle des entailles de la tête de serrage (12) voire de la zone de partage des mâchoires de serrage (21). L'étendue axiale de ces évidements (25) est au moins égale à la plus grande section de recouvrement des deux surfaces coniques. A des fins fonctionnelles, les évidements (25) sont remplis jusqu'à la surface conique intérieure imaginaire d'un garnissage (27) constitué d'un matériau à la fois élastique et compressible. Les garnissages (27) sont en liaison durable avec le corps de mandrin (11).

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