Patent ID: 9259810
Filing Date: 2016-02-16
CPC Classification: B23K,B23P,F16B,Y10T

Claim Text:
1. A component for use with a rotary tool and to be inserted through a surface of a workpiece substantially made of aluminum showing friction-induced plasticity for attachment to the workpiece, said component comprising: a head portion having a base and a working end being threaded at its outer surface; and an insert portion extending along an insertion axis of said component and aligned with said head portion, said insert portion having a penetrating end defining a maximum outer diameter of said insert portion, at least an outer surface of said insert portion including said penetrating end being made of a material substantially harder than aluminum and showing a plasticizing temperature substantially higher than aluminum plasticizing temperature, said outer surface forms at least one generally circular anchoring recess centered with reference to said axis and defining a minimum diameter smaller than said maximum diameter, said insert portion being provided with a threaded bore closed at said penetrating end and extending along said axis to initially receive said threaded working end; wherein said head portion base is adapted to be secured to said rotary tool for rotation in a first direction while applying an axial force of a sufficient magnitude onto the head portion base to produce substantially full insertion of the insert portion along said axis by plasticizing aluminum through friction which fills said anchoring recess and to produce said attachment after a sufficient setting time; wherein an overall dimension of the head portion in a direction transversal to said insertion axis does not substantially extend beyond said maximum diameter, said head portion being adapted not to substantially deform upon insertion of the insert portion, and wherein a ratio of said minimum diameter and said maximum diameter is between about 65% and 90%.