Composite Die for Slanted Wedge Bending and Reshaping of U-like Section Stamping Parts

Abstract

A compound mold for oblique wedge bending and shaping of U-shaped cross-section stamping parts, including a mold handle, an upper mold plate, an upper pressure block, an upper mold insert, a slider, a lower pressure plate, a guide sleeve and a spring. The upper mold part, and the lower mold plate , oblique wedge, wear plate, punch, guide post and pin are the lower part of the die. There are three open shallow grooves on the bottom surface of the upper formwork, and the cross-section of the upper pressing block is isosceles trapezoidal, which is connected with the lower pressing plate through screws covered with springs outside. One side of the two bar-shaped block-shaped upper mold inserts is an inclined plane, and the surface opposite to the inclined plane has a T-shaped groove. The bottom of the slider is V-shaped, and the upper end is a T-shaped boss embedded in the T-shaped groove of the upper mold insert. During production, the lower platen presses the sheet, and the slider bends the sheet from both sides from outside to inside and from top to bottom under the action of the upper die insert, wedge and wear plate, and finally the slider and the punch are aligned. Bending corner shaping not only reduces springback, but also prevents the upper die from scratching the straight wall of the blank. It can bend parts of various widths and can be used on various general-purpose presses.

Description

technical field [0001] The invention relates to a die used in the field of sheet metal stamping and forming, which can realize bending and shaping of U-shaped and similar U-shaped cross-section parts in one stamping stroke. Background technique [0002] Bending is a commonly used basic process in stamping production, which can be used to form various parts including U-shaped and U-like cross-sectional shapes with horizontal sides on both sides. During the bending process of the traditional bending method, since there is always uneven elastic and plastic deformation in the deformation zone, it is easy to have defects such as springback and non-vertical side walls on the section. As more and more high-strength steel plates are used in U-shaped cross-section parts such as automobile girders, bending springback becomes more and more serious. Since the springback problem involves many factors and is very complicated, it is not yet possible to accurately predict the amount of spr...

AI Technical Summary

Problems solved by technology

Since the springback problem involves many factors and is very complicated, it is not yet possible to accurately predict the amount of springback in theory. In practice, most of the springback is reduced by repeatedly adjusting the mold, adding additional shaping processes, and using hot punching, etc., resulting in production failure. Reduced efficiency and increased costs

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