自钻成分包括具有圆柱形侧壁的本体，在主体的第一端处的自钻头和在第二端处开口的柄。 自钻孔部件包括在自钻孔头和第二端之间的可变形区域，设计成在进行压接时形成凸缘。 自钻头还包括由三个同时边缘限定的尖端，其中至少两个边缘是内部切割边缘，该末端使得自钻孔部件能够接合，至少一个外部切削刃设置在圆柱形侧壁的端部 被配置为切割所述复合材料部分的纤维，以及平行于并且不同于包含所述主体的旋转轴线的轴向平面的第一表面，所述第一表面在所述自钻孔头中限定第一空闲空间以便于移除 进行钻孔时的刨花。

The self-piercing profile (1) is intended to pierce an element of composite material by rotation about an axis of rotation. The self-piercing profile (1) comprises a body (2) having a cylindrical side wall (3), a self-drilling head (4) at a first end of the body (2) and a shaft opening at a second end (5 ) of the body (2). The self-piercing profile (1) comprises a deformable region disposed between the self-drilling head (4) and the second end (5) of the body (2) which is capable of forming a bead during crimping. The self-drilling head (4) further comprises a tip (7) defined by three intersecting edges which at least two are internal cutting edges, the tip (7) for the commitment of the self-piercing profile (1) at least one outer cutting edge (12) placed at the end of the cylindrical side wall (3) configured to cut the fibers of the composite material element, and a first face (10) parallel to and different from an axial plane containing the axis of rotation (9) of the body (2), the first face (10) defining a first cavity (11) in the self-drilling head (4) to facilitate the chip flow during drilling.