Method for manufacturing inserts with holes for clamping

Details Method for manufacturing inserts with holes for clamping Method for manufacturing inserts with holes for clamping

B - Operations, Transporting

22

F

B22F 3/15 (2006.01) B22F 3/14 (2006.01) B22F 5/10 (2006.01) B22F 7/00 (2006.01) C22C 1/05 (2006.01)

Patent

CA 2289937

The present invention relates to a method wherein a superhard abrasive material is sintered and simultaneously bonded to a sintered cemented carbide body inside a container under elevated pressure and temperature conditions (HP/HT-treatment), whereby said cemented carbide body in contact with at least one other cemented carbide body which after the sintering is removed. At least the cemented carbide surfaces in contact with each other during the HP/HT- treatment is at least one coated with a 1-10 µm thick layer of a refractory oxide. The method is particularly applicable for making cemented carbide cutting inserts provided a superabrasive material and with a hole for clamping to a tool holder whereby said hole is filled with a cemented carbide plug during the HP/HT-treatment and being removed thereafter. Preferably, both the plug and the insert blank are coated.

L'invention concerne un procédé selon lequel un matériau abrasif superdur est fritté et simultanément lié à un corps en carbure cémenté fritté placé à l'intérieur d'un conteneur dans des conditions de haute pression et de haute température (traitement HP/HT), ce corps en carbure cémenté étant en contact avec au moins un autre corps en carbure cémenté qui est retiré après le frittage. Au moins les surfaces en carbure cémenté en contact entre elles pendant le traitement HP/HT sont revêtues au moins d'une couche d'oxyde réfractaire d'une épaisseur de 1-10 µm. Ce procédé est particulièrement adapté à la production de plaquettes en carbure cémenté constituées d'un matériau superabrasif et dotées d'un trou permettant leur fixation par serrage à un porte-outil. Pendant le traitement HP/HT, le trou est obturé par un bouchon en carbure cémenté qui est ensuite retiré. De préférence, le bouchon et l'ébauche de plaquette sont dotés d'un revêtement.

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