The invention relates to a split
welding type
car door anti-collision beam, which is fixedly connected with an inner plate of a
car door by
welding spots, rivets or bolts. The anti-collision beam consists of an anti-collision beam outer plate and an anti-collision beam cover plate, wherein the anti-collision beam outer plate is manufactured by a bending
machining technology, the cross section of the anti-collision beam outer plate is U-shaped and comprises a
flange, and the anti-collision beam cover plate is welded on the
flange of the anti-collision beam outer plate. A sealed space formed by the anti-collision beam outer plate and the cover plate is filled with light porous material. The anti-collision beam outer plate is divided into four sections according to
performance requirement, i.e. an outer plate left first section, an outer plate left second section, an outer plate right second section and an outer plate right first section respectively from left to right, the four sections are connected into a whole in the manner of
laser split
welding, and the material can be a high-strength steel plate, aluminum plate or
magnesium plate. Compared with the prior art, the split welding type
car door anti-collision beam can extremely reduce the deformation of the car door when a car is collided, can enhance the anti-pit performance of the car door, and is simple in structure, and high in reliability.