Hot stamping forming sheet heating furnace

Abstract

The invention discloses a heat stamping forming board heating furnace. The board heating furnace comprises a furnace wall and conveying rollers for conveying a heated board. A board input opening and a board output opening are formed in the front end and the back end of the furnace wall respectively; and the conveying rollers are driven by an external driving system to rotate so as to convey the board. The furnace wall and furnace interior space defined by the furnace wall are sequentially divided into an induction area and a radiation area in the direction of board conveying. A partition board is arranged between the induction area and the radiation area, and a partition board channel is arranged in the middle of the partition board; the induction area is provided with a supporting part, an induction coil and a heating controller; the radiation area is provided with radiation pipes; and protection gas connection pipes are arranged on the furnace wall. The board heating furnace has the advantages that the board on the heat stamping forming production line is fully austenitized, and meanwhile the requirements for the continuous production takt and energy saving are met; the quality of heat formed products and quality stability are ensured; and heating efficiency is improved; and the heating period is shortened, and the heat energy loss is reduced.

Description

technical field [0001] The invention relates to a heating furnace, in particular to a heating furnace for hot stamping sheet metal. Background technique [0002] With the continuous improvement of automobile safety and energy saving and emission reduction requirements, automobile lightweight has become an important research field in today's automobile industry. The hot stamping forming technology of auto parts can form stamping parts with a strength as high as 1500MPa, and there is almost no springback when forming at high temperature, and it has the advantages of high forming precision and good forming performance. hot tech. [0003] During the hot stamping process of high-strength hot-forming steel, the material structure changes from the austenite structure in the heated state to the ultra-high-strength martensite structure through rapid forming and quenching inside the low-temperature mold, which greatly improves its strength. The heating of the thermoforming sheet is ...

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Problems solved by technology

Since the above-mentioned methods conduct heat to the sheet for heating through heat radiation, the heating cycle required for the sheet to rise from room temperature (about 20°C) to the material's austenitization temperature (above 850°C) is long and the heating efficiency is low. , and the heat energy loss caused by heat loss in this cycle increases

[0005] As mentioned above, the prior art has the following disadvantages: 1. The heating efficiency of radiation heat transfer is low, and the heating period required for heating to the austenitizing temperature is long; 2. The energy loss is relatively large

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