Patent ID: 7735209

Claim:
A method for the attachment of a fastener element to a component having a pre-formed hole and material surrounding said hole, wherein the fastener element has an axis of symmetry, a head part having a contact surface which enters into contact with the component, a fastening section having a thread, with the thread being formed as a shaft part of the fastener element, and the fastener element also having at least one undercut which receives the material of the component, and wherein the material of the component is pressed against the contact surface and into the undercut by means of a first tool having a die button shape matching the design of the fastener element, wherein a local force is exerted on the head part of the fastener element or onto the first tool to the side of the axis of symmetry and is moved circularly around the axis of symmetry while simultaneously carrying out a relative feed movement between the first tool and the fastener element between which the component is arranged in order to press the material of the component into the undercut and wherein said shaft part is guided through said pre-formed hole prior to exerting the local force for the movement of the material of the component into the undercut, and wherein the head part of the fastener element is received in a cut-out of a second tool the end face of which supports the component at least substantially at the level of the contact surface, and wherein the local force is exerted onto the component with the first tool which is disposed at an inclined position relative to the axis of symmetry and is rotated about the axis of symmetry.