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.
Variable-thickness automobile doorsill beam and manufacturing method thereof
30.09.2015
Patent
Elektronische Ressource
Englisch
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