Stereoscopic rapid heating device and heating method of hot stamping blank

Abstract

The invention relates to the technical field of hot stamping, in particular to a stereoscopic rapid heating device and a heating method of a hot stamping blank. The device comprises a first heating chamber and a second heating chamber, wherein the first heating chamber and the second heating chamber are equipped with a first temperature-resistant conveying mechanism and a second temperature-resistant conveying mechanism respectively; the first heating chamber is provided with a plurality of infrared heating lamp tubes for heating the blank along the first temperature-resistant conveying mechanism; the second heating chamber is provided with an electric furnace for heating the blank. The method comprises the steps of conveying the blank to the first heating chamber with the first temperature-resistant conveying mechanism, heating the blank to a setting temperature with the infrared heating lamp tubes, conveying the blank to the second heating chamber with the second temperature-resistant conveying mechanism, and heating the blank and preserving heat with the electric furnace. The device is relatively simple in structure, small in floor area and high in heating efficiency and improves temperature uniformity of the blank and heating efficiency above a curie point.

Description

technical field [0001] The invention relates to the technical field of hot stamping forming processing, in particular to a three-dimensional rapid heating device and heating method for a hot stamping blank. Background technique [0002] In recent years, in order to meet the needs of safety and energy saving and emission reduction (weight reduction), high-strength automotive steel has received widespread attention. Due to the increase in strength level, the traditional cold stamping forming technology cannot overcome the springback of high-strength steel after forming and ensure the dimensional accuracy of auto parts. Hot forming can use high-strength steel to produce complex parts, forming and quenching at the same time, and achieve high strength through phase transformation strengthening. The tensile strength of parts after hot stamping of high-strength steel can reach 1500MPa and above, which meets safety requirements while saving energy and reducing weight. Hot forming ...

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Problems solved by technology

Using electromagnetic induction heating alone requires a suitable coil, the flexibility of the equipment is not good, and the heating efficiency of electromagnetic induction heating drops significantly after the temperature is higher than the Curie point

A university has adopted electromagnetic induction heating and electric furnace composite heating method, but there are also shortcomings such as poor equipment flexibility

Infrared heating is generally used in the food industry, but it is also used in steel plate heating. Infrared heating alone is used in general application and local heating of steel plates, and it is lower than the austenitization temperature. poor this shortcoming

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