Edge covering method and device of high-strength steel

Abstract

The invention discloses an edge covering method and device of high-strength steel. The edge covering method and device of the high-strength steel are used for operating edge covering on a high-strength steel assembly, the high-strength steel assembly comprises an outer plate and an inner plate, and the outer plate is provided with a bending part. The edge covering method comprises the following steps that the outer plate and the inner plate to be subjected to edge covering are placed on a locating mechanism, and locating is carried out; the outer plate and the inner plate after being located are tightly clamped by a clamping mechanism; the bending part of the outer plate is heated by a heating mechanism, and thus the temperature of the bending part of the outer plate is made to be above 800 DEG C; and a press-fitting mechanism operates press fitting on the outer plate after being heated until the inner plate is wrapped by the outer plate. According to the technical scheme, edge covering of the high-strength steel assembly with superhigh intensity and hardness after the heat treatment can be carried out, the machining range of the edge covering technology is expanded, and the technical support is provided for further development of lightweight of automobile.

Description

technical field [0001] The invention relates to the technical field of hemming of sheet metal parts, in particular to a method and device for hemming of high-strength steel. Background technique [0002] At present, the automobile industry has higher and higher requirements for the collision safety of automobiles. At the same time, the restrictions on carbon dioxide emissions are becoming more and more stringent. People have to reduce carbon emissions by reducing the weight of automobiles. Thermoforming technology is the key to lightweight automobiles. One of the directions of development. At present, the number of thermoformed parts used in body safety parts is increasing, but the industry has not yet used thermoformed parts on automobile panels to increase strength and reduce weight at the same time. The reason is that the edge wrapping of thermoformed parts Process bottlenecks are likely to be an important factor. [0003] Generally, the four doors and two covers of a c...

AI Technical Summary

Problems solved by technology

However, when the inner and outer plates are thermoformed, a high-strength sheet metal part is formed, that is, its strength and hardness are extremely high, and its ductility is very low. When the flanging angle exceeds 60°, the outer plate will crack directly, so the existing hemming Processes and hemming equipment cannot hem high-strength steel. This bottleneck restricts the application of high-strength steel in automotive panels

Images