On the premise of fully ensuring collision safety and high body strength, HSB high-strength body focuses on lightweight. In order to achieve this goal, Volkswagen's high-strength body uses a large number of different grades of steel. This material is used in the front and rear bumper brackets, the center tunnel, the foot cross beam, the door sill, the B-pillar and the roof frame. These areas are also the main stress areas in the frontal and side collision of the vehicle, which will ensure the integrity of the passenger area in the collision process together with the collision energy absorption area on the vehicle body, thus minimizing the possibility of injury to the internal components of the vehicle.
In the event of a side collision, the side wall of the three-layer structure plays a strong supporting role for the whole body structure and provides a guarantee for the living space in the car. The most critical part of the side wall is the B-pillar reinforcement plate made of thermoformed steel plate, which completes the energy absorption during the collision with the door. Its structural design fully considers the impact on the interior components of the car when a collision occurs and the minimization of spatial deformation in the component area. In addition to using high-strength steel anti-collision bars inside the door, the inner panel also uses laser welded plates with different thicknesses, which not only ensures the strength of the door, but also achieves the purpose of lightweight.
In frontal collision, the impact force is dispersed to the structure of the impact area through the bumper bracket made of thermoformed steel plate, and the impact energy weakened by the longitudinal beam is transmitted to the foot beam, the central groove and the threshold, which are also made of ultra-high strength thermoformed steel plate, so as to avoid the protruding danger of the front foot area during collision.
In terms of pedestrian protection, the high-strength body of Volkswagen HSB has also adopted a comprehensive design. The structure and spatial arrangement of many parts in the front of the car body fully consider their mutual influence and synergy. The connection of fender, front cover and hinge has also been optimized. In addition, energy-absorbing foam parts are specially added in the bumper area for pedestrian protection, so as to minimize the injury to pedestrians' legs during collision.
In addition, Volkswagen HSB high-strength body uses a large number of laser welding processes. For example, on sagitar car body, the total length of laser welding reaches 33.2m, and Touran reaches 465,438+0 m. Advanced laser welding technology not only brings higher precision, more stable quality and higher efficiency to car body processing, but also greatly improves the rigidity and strength of the car body and obviously improves the driving comfort, stability, vibration and noise of the car.