Variable-thickness automobile doorsill beam and manufacturing method thereof

Abstract

The invention provides a variable-thickness automobile doorsill beam and a manufacturing method thereof. The variable-thickness automobile doorsill beam comprises a doorsill beam outer plate, a doorsill beam inner plate and a connecting plate arranged between the doorsill beam outer plate and the doorsill beam inner plate. The doorsill beam outer plate sequentially comprises an outer plate front section, an outer plate front transition section, an outer plate middle section, an outer plate rear transition section and an outer plate rear section. The doorsill beam inner plate sequentially comprises an inner plate front section, an inner plate front transition section, an inner plate middle section, an inner plate rear transition section and an inner plate rear section. The inner plate front section, the outer plate front section, the inner plate middle section, the outer plate middle section, the inner plate rear section and the outer plate rear section are of equal-thickness structures. The inner plate front transition section, the inner plate rear transition section, the outer plate front transition section and the outer plate rear transition section of the doorsill beam are of variable-thickness structures. The thicknesses of the sections are gradually decreased from thicker zones on two sides to the thinner zone. The variable-thickness automobile doorsill beam can well meet the collision safety requirement of an automobile body, is simple in structure and is manufactured by adopting a continuous variable-thickness steel plate, excessive design on the aspects of material thickness and part number can be avoided, the manufacturing cost of the doorsill beam can be reduced, and the lightweight effect is good.

Description

technical field [0001] The invention belongs to the field of design and manufacture of auto parts, and mainly discloses a variable-thickness auto threshold beam and a manufacturing method thereof. Background technique [0002] In the automobile body structure, the energy absorption characteristics of the sill beam in the process of the side collision of the automobile have an important relationship with the safety of the automobile body, and also have an important influence on the structural strength and stiffness of the vehicle. Generally, the sill structure is composed of the sill inner panel, the sill outer panel and its internal reinforcements. These parts are overlapped together to form a cavity. torsional stiffness of the car. In order to reduce the amount of intrusion during the side collision of the car and ensure the safety of the occupants, the sill beam is usually designed as an integral structure from the lower section of the A-pillar to the lower section of the...

AI Technical Summary

Problems solved by technology

This feature will cause the sill beam to have non-uniform performance in the longitudinal direction under conditions such as bending, torsion, and compression. Compared with the sill beam in the present invention, the sill beam with constant section and thickness has a large weight and high additional cost. Shortcomings

At the same time, this kind of sill beam with uniform performance in the longitudinal direction of the vehicle body will have a surplus of performance, which is a surplus design in terms of structure and materials, which directly wastes the use of raw materials and increases the weight of the car, which is not conducive to energy saving. , increasing the cost of materials used

Images