| 摘要 |
<p>The invention concerns a method for producing alternating concave and convex grooves (3) uniformly distributed inside a tube (1). It comprises at least one step of simultaneously broaching the set of grooves of the tubes with at least one roughing tool and/or at least one finishing tool, tools made integral with a maneuvering bar through linking means (17), the various roughing tools being successively used and having a convex profile enabling gradual approach to the concave profile of the grooves, at least one finishing tool having a concave profile for producing the convex profile of the grooves.</p> |
