Corrugated carriages have better endurance and greater strength. The strength of the flat plate is small.
The side plates of freight cars are generally made of steel plates. However, the steel plate is heavy, which easily leads to the heavy weight of the whole vehicle and requires a lot of energy to drive it. In the prior art, the China patent with the publication number of cn205 1 13478u discloses a corrugated board car made of aluminum profiles, and the weight of aluminum is obviously lighter than that of steel, so the car made of aluminum corrugated can effectively reduce the weight of the whole car. The joint between the side plate and the top plate of the corrugated board car is welded. Because corrugated cardboard is thin and made of aluminum, it is difficult to weld, the strength of welded joints is poor and the joints are easy to be damaged.