Spirally formed pipe cutter with driving mechanism to...

B - Operations – Transporting – 21 – C

Patent

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Details

B21C 37/12 (2006.01) B23D 21/14 (2006.01)

Patent

CA 2400096

A method and apparatus for cutting spiral pipe is disclosed. The pipe cutting apparatus includes a driving mechanism that imparts rotation to a knife located inside the spiral pipe via a drive element, such as a drive shaft. The method includes forming a spiral pipe from a strip of material received at a forming head of a spiral pipe former, engaging a driving mechanism attached to a first knife positioned substantially inside the inner circumference of the pipe forming head to impart rotation to the first knife, and cutting the spiral pipe with the first knife by bringing a second knife positioned substantially outside the outer circumference of the forming head into overlapping contact with the first knife.

L'invention concerne un procédé et un appareil de coupe de tuyaux en spirale. Cet appareil de coupe comprend un mécanisme d'entraînement qui fait tourner un couteau placé à l'intérieur du tuyau en spirale par l'intermédiaire d'un élément d'entraînement, tel qu'un arbre. Ce procédé consiste à former un tuyau en spirale à partir d'une bande de matériau reçue au niveau d'une tête de formage d'un tuyau en spirale formé, à enclencher un mécanisme d'entraînement fixé à un premier couteau positionné sensiblement dans la circonférence intérieure de la tête de formage du tuyau, afin de faire tourner le premier couteau, et à couper le tuyau en spirale avec le premier couteau en mettant en contact un second couteau positionné sensiblement hors de la circonférence extérieure de la tête de formage avec le premier couteau.

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