Seat Rail Attachment Part Embossing for Crash Resistance

The patent applies embossments locally at the marginal edges of the attachment part, specifically at the burr side where microcracks occur. This local reinforcement through embossing creates a geometric structure that distributes stress and prevents crack propagation, achieving enhanced strength at critical locations without increasing the overall material thickness or weight of the attachment part.

The patent changes the geometric parameters of the attachment part by adding embossments at the marginal edges. This parameter change transforms the flat marginal surface into a structured surface with increased surface area and improved stress distribution. The embossments modify the physical structure to enhance loadability and crash resistance while maintaining the same material thickness, thereby avoiding the increased material costs associated with thicker sections.

The patent applies embossments to the marginal edges of the attachment part during the stamping process, before the attachment part is installed in the seat rail. This preliminary action of embossing prepares the marginal edges to withstand high loads and prevent microcrack propagation from the burr side. By pre-reinforcing the critical areas with embossments, the attachment part achieves adequate crash resistance even with reduced material thickness, enabling light-weight construction without compromising safety.