Soft steel unloading rib plate used for laser welding pipe UO forming mold

Abstract

The invention discloses a soft steel unloading rib plate used for a laser welding pipe UO forming mold. The soft steel unloading rib plate comprises an unloading rib plate body, wherein the body comprises upper, middle and lower sections; the vertical section of the upper section is rectangular; the middle section comprises a transition section and a middle section body; the vertical section of the transition section is an isosceles trapezoid; the vertical section of the middle section body is an isosceles trapezoid; the upper edge of the transition section is as wide as the upper and lower sections and is wider than the lower edge of the transition section; the upper edge of the middle section body is as wide as the lower edge of the transition section and is wider than the lower edge of the middle section body; and the vertical section of the lower section is rectangular. With the adoption of the soft steel unloading rib plate, a soft steel unloading problem in a UO forming process can be solved, and the opening size of a molding pipe meets welding requirements of a later procedure after unloading, and an unloading function of a plurality of types of welding pipe products is realized.

Description

technical field [0001] The invention relates to a forming die for a laser welded pipe, more specifically, the invention relates to a mild steel unloading rib plate for a UO forming die of a laser welded pipe. Background technique [0002] Since laser welded pipes have been widely used in the automotive field in recent years, the functions of laser welded pipes of various strength levels are also different. In order to ensure the safety of automobiles, the AB pillars and supports of body parts are mainly made of ultra-high-strength steel materials, while the chassis The parts are mainly made of thick general high-strength steel, and the tensile strength of the material is about 300Mpa to 980Mpa. With the fluctuation of material properties, the difficulty of UO mold forming and unloading of pipe fittings after closed pressing also increases. is gradually increasing. The requirements of the UO forming process, the press needs about 1,000 tons of pressure during the O forming p...

AI Technical Summary

Problems solved by technology

The cross-section of the existing unloading rib 7 is rectangular. After the molding is completed, the ultra-high-strength material above 800 MPa has a relatively high springback, so the opening size of the welded pipe is larger than the width of the unloading rib 7, and the material can be unloaded. But for materials with lower yield, the edge of the steel plate 6 will be stuck on the unloading rib plate 7, and the material cannot be unloaded, and the linkage transmission cannot be carried out.

[0004] To sum up, for products with lower strength, the existing unloading ribs cannot guarantee that the opening of the forming tube can also have the unloading function under the precondition of satisfying the process of forming

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