A hot stamping forming triple lock type connecting device and method

Abstract

The present invention provides a hot stamping triple lock type connecting device, comprising: a lower mold, a fixed mold is arranged at the lower part of the lower mold; a plate area, the plate area is placed directly above the lower mold, the A lower plate is provided on the lower side of the plate area, an upper plate is arranged above the lower plate, and an annular blank holder is arranged above the upper plate; an upper die, and the upper die is located directly above the plate area. The present invention also provides a hot stamping forming triple lock connection method. This method uses a heated special upper die to stamp the plate, rapidly increasing the plastic deformation capacity of the plate, and forms a special joint under the action of the special lower die. The unique triple mechanical locking structure, while the connection point is cooled by the water circulation channel, realizes the quenching process and significantly improves the mechanical properties of the connection point. This method has the advantages of high connection strength and high dimensional accuracy, and can be used to connect high-strength plates.

Description

technical field [0001] The invention relates to the field of stamping devices, in particular to a hot stamping triple lock connection device and method. Background technique [0002] In the field of industrial manufacturing, dissimilar metal composite structures have gained more and more attention due to the respective advantages of the two materials, especially the composite structure of aluminum alloy and high-strength steel. Aluminum alloy has the advantages of light weight, high thermal conductivity, and high electrical conductivity, while steel has the advantages of high strength and good plasticity. Therefore, the composite structure composed of aluminum and steel can effectively reduce the weight of the structure and improve the strength, corrosion resistance and corrosion resistance of the material. Impact resistance. [0003] Welding and self-piercing riveting are the main joining methods for joining two or more composite plates. However, due to the inconsistent me...

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Problems solved by technology

[0003] Welding and self-piercing riveting are the main joining methods used to join two or more composite plates. However, due to the inconsistent melting points of aluminum alloy and high-strength steel, reliable joints cannot be achieved by traditional welding

Self-piercing riveting is a connection technology in which a firm riveting point is formed by forming a firm riveting point through the hollow structure at the tail of the rivet under the action of the riveting die after the special rivet penetrates the top sheet without piercing the bottom sheet. The force is relatively large, and the overall quality of the plate is improved due to the introduction of external rivets. The penetration of the rivets into the upper plate also reduces the corrosion resistance and impact resistance of the plate. In addition, after self-piercing riveting, the plate will return Elastic, which affects the dimensional accuracy of the connection point

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