Friction stir welding using a superabrasive tool

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 20/12 (2006.01) B23K 20/227 (2006.01) B23K 37/00 (2006.01) C23C 14/06 (2006.01)

Patent

CA 2409489

A probe for friction stir welding MMCs, ferrous alloys, non-ferrous alloys, and superalloys, as well as non-ferrous alloys, the probe (28) including a shank (30), a shoulder (32), and a pin (34) disposed through the shoulder and into the shank, wherein the pin and the shoulder at least include a coating comprised of a superabrasive material, the pin and shoulder being designed to reduce stress risers, disposing a collar (36) around a portion of the shoulder and shank to thereby prevent movement of the shoulder relative to the shank, and incorporating thermal management by providing a first thermal flow barrier (38) between the shoulder and the shank, and a second thermal flow barrier (40) between the collar and tool.

L'invention concerne une sonde destinée au soudage par friction malaxage de CMM, d'alliages ferreux, d'alliages non ferreux et de superalliages, ainsi que des alliages non ferreux. Ladite sonde (28) est constituée d'une tige (30), d'un épaulement (32) et d'un axe (34) inséré dans la tige via l'épaulement. Ladite sonde est caractérisée en ce que la broche et l'épaulement au moins comportent un revêtement constitué d'un matériau super abrasif, la broche et l'épaulement étant conçus pour réduire les facteurs d'augmentation de la contrainte. A cet effet, on dispose une bague (36) sur une partie de l'épaulement et de la tige pour éviter tout mouvement de l'épaulement par rapport à la tige, la gestion thermique étant assurée par une première barrière de flux thermique (38) disposée entre l'épaulement et la tige, et une deuxième barrière de flux thermique (40) entre la bague et l'outil.

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