Tool for making enhanced heat transfer surfaces

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 29/03 (2006.01) B21C 37/20 (2006.01) B21D 53/06 (2006.01) B23D 21/14 (2006.01) B23D 77/00 (2006.01) B23G 1/52 (2006.01) B23G 5/00 (2006.01) B26D 3/10 (2006.01) F28F 1/40 (2006.01)

Patent

CA 2601112

An improved tool assembly for enhancing the surface of a heat transfer tube is provided. The tool assembly includes rods having cutting tips and positioned in rod guides which are slidably positioned in shafts provided in a tool holder. In an equilibrium state, the cutting tips do not extend from the tool holder. When a force is applied to the rod guides, the rod guides move in a first direction along the shafts in the tool holder, resulting in exposure of the cutting tips which enhance the tube surface. When the force is removed from the rod guides, the rod guides move along the shafts in a direction opposite the first direction to retract the cutting tips within the tool holder. In this way, the cutting tips are protected when not in use.

L'invention concerne un ensemble outil évolué servant à améliorer la surface d'un tube de transfert thermique. L'ensemble outil comprend des tiges munies de têtes de coupe et placées dans des guides de tiges positionnées par coulissement dans des arbres ménagés dans un porte-outil. En état d'équilibre, les têtes de coupe ne débordent pas du porte-outil. Lorsqu'une force est exercée sur les guides de tiges, ceux-ci se déplacent dans une première direction, le long des arbres placés dans le porte-outil, ce qui expose les têtes de coupe et améliore la surface du tube. Lorsque la force n'est plus exercée sur les guides de tiges, ceux-ci se déplacent le long des arbres dans un sens opposé au premier sens, et les têtes de coupe rentrent à l'intérieur du porte-outil. Ainsi, les têtes de coupe sont protégées lorsqu'elles ne sont pas en service.

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