Hot-stamping automobile part with flexibly-distributed intensity and control method thereof

Abstract

The invention discloses a manufacturing technology and process of a hot-stamping part with flexibly-distributed intensity. In the invention, by utilizing a flexible and controllable hot-stamping die with a cooling pipeline, the surface cooling speed of a die for forming a high-intensity part is controlled at more than 60-80 DEG C/s, the flow velocity of cooling water is 2.5-3m/s, the water flow pressure at an entrance is 7-8bar, and the water flow pressure at an exit is 5-7bar; and the surface cooling speed of a die for forming a medium-intensity part of the automobile parts is controlled at more than 10-30 DEG C/s, the water flow velocity in the die is 1-2m/s, the water flow pressure at the die entrance is 5-6bar, and the water flow pressure at the die exit is 3-5bar. By utilizing the process, diversified structures and flexible intensity distribution of the parts are realized so that different parts of the automobile parts have different intensity; and meanwhile plate structures with different intensity are transited gently and the performances of the plate structures are transited smoothly without abrupt changes, thus achieving more ideal performances, lowering the manufacturing cost and simplifying procedures.

Description

technical field [0001] The invention relates to a processing and manufacturing process of an ultra-high-strength lightweight vehicle body structure and a safety part, in particular to a manufacturing technology and process of hot stamping parts with flexible strength distribution. Background technique [0002] The development of automobile technology, the increase of automobile production and automobile ownership have brought about three major problems of energy consumption, safety and emissions. Energy conservation and emission reduction are important issues that automobiles urgently need to solve, and lightweight is the most direct and effective way to achieve energy conservation and emission reduction. One of the best means and ways: for every 10% reduction in weight of passenger cars, fuel consumption can be reduced by 8%, and emissions can be reduced by 4%-6%. [0003] Lightweight implementation can be achieved through optimized design, reasonable selection and use of m...

AI Technical Summary

Problems solved by technology

After adopting this method, there is no smooth transition of properties on both sides of the weld, and the structure composition and strength contrast are large, which not only increases the process, but also increases the weld quality.

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