Bumper lower stiffener with improved performance using ultra high strength steel pipe and manufacturing method thereof

Abstract

The present invention relates to a bumper lower stiffener formed at the lower portion of the front bumper of a vehicle and a manufacturing method thereof. More specifically, the present invention relates to a bumper lower stiffener manufactured using a steel pipe formed by hot pressing and a manufacturing method thereof. The present invention provides a method for manufacturing the horizontal member of the bumper lower stiffener, which includes a cutting step of cutting a steel pipe added with quenching elements at a predetermined length; a heat treatment step of heating the cut steel pipe at a molding temperature; a hot pressing step of hot-pressing the heated steel pipe with press molds into the shape of the horizontal member having plane surface sections at the both sides thereof; and a cooling step of rapidly cooling the formed horizontal member in the state that the press molds are closed.

Description

technical field [0001] The present invention relates to a bumper lower stiffener (bumper lower stiffener) constituting the lower part of the front bumper of a vehicle and a manufacturing method thereof. its method of manufacture. Background technique [0002] Generally speaking, the front of the car is equipped with a hood latch for fixing the headlights, a grille, and the hood, and cooling module accessories for cooling, etc., and these are fixed on the shelf. As far as the rack is concerned, in order to increase rigidity and reduce weight, the part that bears more load is made of metal material, and the part that bears less load is made of plastic composite material. Such shelves are manufactured by insert injection molding of sheet metal and plastic material. [0003] The front side member on the shelf is combined with the rear member for mounting the front bumper. In addition, it is installed on the lower member of the carrier as a reinforcement material for the lower...

AI Technical Summary

Problems solved by technology

At this time, since the lower rods 15 of the rack 10 are constructed using plastic materials, if the lower reinforcing material 30 receives an impact, the moment caused by the impact transmitted to the lower reinforcing material 30 will be applied to the lower rods of the rack 10. 15, the lower reinforcing material 30 of the shelf 10 will be easily damaged when the crack occurs

As a result, not only the pedestrian's knees are directly fatally damaged by the bumper rear beam, but also the impact of the collision is transferred through the shelf 10 to cause damage to the headlights, refrigeration modules, etc. located on the front surface of the vehicle, resulting in Even minor conflicts can damage many parts of the vehicle, resulting in an increase in repair costs

Images