A continuous hot stamping device and process

Abstract

The invention discloses a continuous hot stamping device and process. The device includes a composite mold and an electric heating mechanism; the composite mold is installed on a double-action press, and the composite mold includes an upper mold and a lower mold oppositely arranged; Said upper die comprises upper mold base, forming punch, trimming die and punching punch; said lower mold comprises lower die base, forming die, ejector plate, elastic pad and bracket, and said forming die is fixed Installed on the lower mold base, the ejector plate is arranged directly below the trimming die, the bottom of the ejector plate is fixedly connected with the elastic pad through the ejector rod, and the support frame is installed on the lower Two ends of the mold base; the electric heating mechanism includes a power supply, a movable electrode, a fixed electrode and a lifting assembly. The invention can continuously complete rapid heating, drawing forming, pressure-holding quenching, trimming and punching, improves production efficiency, and avoids the transportation process of hot blanks before stamping.

Description

technical field [0001] The invention belongs to the technical field of hot stamping, and in particular relates to a continuous hot stamping device and process. Background technique [0002] Hot stamping technology is a new technology for forming lightweight and high-strength parts, which has the advantages of small springback, good mold fit, and high dimensional accuracy. The use of lightweight and high-strength auto parts can improve the safety performance of the car and reduce the weight of the car, which is of great significance for realizing the lightweight of the car. [0003] Traditional hot stamping process: first, heat the prefabricated billet of light-weight and high-strength sheet to a certain temperature, then quickly transfer the hot billet 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 and heat them at room temperature Cool, and finally laser cut to form the...

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, and there are also problems such as low heating efficiency, long time-consuming transfer of hot blanks, and fast cooling.

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