Method and die for obtaining variable-intensity hot stamping part

Abstract

The invention relates to the field of hot stamping forming and discloses a method and a die for obtaining a variable-intensity hot stamping part. The method for obtaining the variable-intensity hot stamping part is characterized by including steps that 1) preparing the die; 2) preparing; 3) stamping, to be specific, quickly moving a completely austenitized part blank to the die from a heating furnace; enabling a fixed insert of an upper die and a movable insert of the upper die to synchronously move downward till the die is closed, and finishing the hot stamping forming; 4) maintaining pressure and quenching, to be specific, quenching the constant-intensity region of the part by means of a die cooling system, and enabling the austenite to completely convert into a martensitic structure; enabling the movable insert of the upper die and a movable insert of a lower die corresponding to the variable-intensity region of the part to separate from the surface of the variable-intensity region of the part after maintaining a closed pressure maintaining state for 1 to 3 seconds, and forming a clearance; 5) returning and taking the part, to be specific, enabling the fixed insert of the upper die and the movable insert of the upper die to synchronously move towards the upside, opening the die, and taking out the part. The method for obtaining the variable-intensity hot stamping part can make different regions of the hot stamping part have different structures and intensities, and the multi-performance requirement of a single part is realized.

Description

technical field [0001] The invention relates to the field of hot stamping forming, and more specifically, relates to a manufacturing method and mold of a variable-strength hot stamping part. Background technique [0002] As the energy crisis and environmental issues become increasingly prominent and people pay more and more attention to automobile safety, safety, energy saving and environmental protection have become the development trend of today's automobile industry. Hot stamping forming technology can effectively solve the problems of poor stamping performance and large springback of high-strength steel plates, and is an effective way to achieve energy saving, emission reduction and vehicle weight reduction. [0003] The hot stamping forming technology is to heat the steel plate to the austenitic state, pressurize and quench after rapid stamping to obtain ultra-high-strength steel parts with martensitic structure. After hot stamping, the strength of the obtained parts c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and mold for obtaining variable-strength hot stamping parts, which can make different regions of hot stamping parts have different structures and st...

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