Patent ID: 6170313
Filing Date: 2001-01-09
Classification: B21D,B60N,Y10T

Abstract:
A process for making a sharp-angled indentation on a hollow metal tube, without removing any material, maintaining a constant thickness of the tube and also without deforming the external diameter and conserving the fiber orientation of the metal from which the tube is made, characterized in that the process comprises the steps of, providing a riveting machine, the riveting machine having an epicycloid mechanism and a spherical joint and comprising a riveting head fitted to a spindle, operating in conjunction with pressing devices and a fixed half-clamp, replacing the spindle of the riveting machine with a sharp angled former adapted to the profile of the indentation to be made and to the former's sharp angle, inserting the tube on which indentations are to be made between the former and the fixed half-clamp and activating the pressing devices, causing movement of the spindle in order to allow indentations to be made in the tube.