Patent ID: 6067839
Filing Date: 2000-05-30
Classification: B23K,B23P,B25B,Y10T

Abstract:
Method of mounting a fastener element (1) in a component (2), said fastener element (1) being provided with a deformable, cylindrical portion (3) which has an axis of symmetry, said cylindrical portion (3) being inserted into a through-hole (4) in the component (2), whereafter the cylindrical portion (3) is deformed in its longitudinal direction by means of a compressive force, so that the length of the cylindrical portion (3) is reduced, comprising applying a torque about the axis of symmetry of the cylindrical portion (3), measuring the torque, keeping the compressive force constant or rendering the torque when the torque, due to the deformation of the cylindrical portion (3), reaches a predetermined value, thereafter applying a torque exceeding the predetermined torque about the axis of symmetry of the cylindrical portion (3) so that the fastener element (1) begins to rotate at a predetermined rotational speed, generating frictional heat between the contact surfaces of the fastener element (1) and the component (2), stopping the rotation when a predetermined time has passed, and thereafter further deforming the cylindrical portion (3), by means of compressive force, in its longitudinal direction so that a combined rivet and frictional welding joint between the fastener element (1) and the component (2) is obtained.