Round bar blade and cutter head

B - Operations – Transporting – 23 – F

Patent

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Details

B23F 23/00 (2006.01) B23F 21/22 (2006.01)

Patent

CA 2208169

A round bar blade (10) and a cutter head (8) provided especially for the same are described. The blade has a shank with a generally round cross-section for being fixed by clamping means (28, 30) in a blade bore (12) of the cutter head (8). A substantially planar positioning surface (38) serving as an engagement surface for the clamping means (28, 30) is formed along the shank length in the extension of a cutting face (43) formed on the cutting end (40) of the round bar blade (10) parallel to the longitudinal blade axis. The cutting face (43) and the positioning surface (38) lie in one and the same plane parallel to the longitudinal blade axis. They are not reground during use and can therefore have a coating which increases the serviceable life of the blade. The clamping means are wedging devices which press with their clamping surface against the positioning surface (38) of the round bar blade (10) in the same direction in which the load during operation also acts. The round bar blade (10) and the cutter head (8) can be produced at low cost, the round bar blade has a long serviceable life, can be easily set up in the cutter head (8) and also maintains its set-up during operation under load.

Une lame circulaire (10) et un couteau (8) fourni spécialement pour la lame circulaire sont décrits. La lame comprend une queue dont la coupe transversale est généralement ronde en vue d'être fixée, à l'aide d'appareils de serrage, (28, 30) dans un alésage de lame (12) du couteau (8). Une surface de positionnement, en grande partie plane (38) qui sert de surface de mise en prise avec les appareils de serrage (28, 30), est formée le long de la queue dans l'extension d'une face tranchante (43) qui constitue le bout tranchant (40) de la lame circulaire (10) et qui est parallèle à l'axe longitudinal de la lame. La face tranchante (43) et la surface de positionnement (38) se trouvent sur le même plan que l'axe longitudinal de la lame. Celles-ci ne sont pas meulées de nouveau pendant l'utilisation et peuvent donc avoir un revêtement, ce qui prolonge la vie utile de la lame. Les appareils de serrage sont des dispositifs de coincement qui serrent, au moyen de leur surface de serrage, contre la surface de positionnement (38) de la lame circulaire (10) dans la direction de la force pendant l'utilisation. La lame circulaire (10) et le couteau (8) peuvent être fabriqués à faible coût, et la lame circulaire offre un état de fonctionnement de longue durée, est facilement installable dans le couteau (8) et maintient sa position pendant l'utilisation même avec l'application d'une force.

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