Multi-station continuous hot stamping production line and method

Abstract

The invention discloses a multi-station continuous hot stamping production line and method. The production line comprises a material loading table, a feeding robot, a press unit, a material conveying robot, a quenching device, a material unloading robot and a conveyor belt which are arranged in sequence. The press unit comprises a heating device, a mould device and at least one press used for installation of the mould device; the heating device is used for wholly or locally heating a prefabricated blank to obtain a hot blank, and the mould device is used for conducting stamping forming, pressure maintaining setting and trimming and punching on the hot blank to obtain a hot stamped part. The rapid heating, stamping forming, pressure maintaining setting, trimming and punching and quenching can be continuously completed, so that the heating efficiency is improved, and the transportation process before punching of the hot blank is also avoided. For steel plates, stamped parts are blanked at a high temperature, increasing of cutting difficulty caused by generation of a martensitic structure at normal temperature is avoided, the blanking force is reduced, and the optimal blanked edge can be obtained.

Description

technical field [0001] The invention belongs to the technical field of hot stamping, and in particular relates to a multi-station continuous hot stamping production line and method. Background technique [0002] Hot stamping technology is a new technology for forming lightweight and high-strength parts. It has the advantages of small springback, good mold fit, and high dimensional accuracy. By using lightweight and high-strength sheet metal forming auto parts, the safety performance of the car can be improved and the weight of the car body can be reduced, making a significant contribution to the realization of the lightweight of the car. [0003] Traditional hot stamping process: first, heat the prefabricated blank made of light and high-strength sheet metal to the hot stamping temperature, then quickly transfer the hot blank to the mold, and then quickly stamp and form, pressurize and quench to complete the structural transformation, and then take out the hot stamping parts...

AI Technical Summary

Problems solved by technology

The existing hot stamping production line has the following problems: First, the ultra-high-strength steel blanks are usually heated in a roller hearth heating furnace, and a large amount of heat will be lost from the roller shaft and the gas, reducing the heating efficiency; second, the blank transfer process not only prolongs the The production cycle, and the hot blank is in contact with the air, the heat loss is serious, and oxidation will occur at the same time (especially for the bare boards that are widely used in China, the oxidation phenomenon is serious), and the oxide skin produced is easy to cause the surface wear of the stamping die; moreover, due to The hot stamped parts after quenching have ultra-high strength and hardness, and laser cutting is usually used in production, which has problems such as long time consumption and high cost

In foreign countries, hot stamping of aluminum alloy plates is also being researched, but there are also problems such as low heating efficiency, long time-consuming transfer of hot blanks, and fast cooling.

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