Flexible steel pads for multi-point forming

A multi-point forming and steel pad technology, which is applied in the field of mechanical engineering, can solve the problems of forming accuracy and reduce sheet forming accuracy, and achieve the effect of dispersing concentrated loads, suppressing wrinkles and indentations, and improving continuity.

CN107127242BActive Publication Date: 2020-02-14JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-02-14

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Abstract

The invention relates to a flexible steel pad for multi-point formation, and belongs to the field of mechanical engineering. The flexible steel pad consists of multiple I-shaped steel pads and a porous polyurethane plate; the multiple steel pads are mounted as a whole through the porous polyurethane plate; during forming of plates, the flexible steel pad is deformed along with a mold surface formed by basic body units of a multi-point forming device, is recovered in a flat state after unloading, and can be recycled; and the flexible steel pad can effectively disperse centralized load applied by the basic body units of the multi-point forming device, so that the stress and the strain suffered in the plate forming process are more uniform, the generation of dents and ripples is inhibited, and the surface quality and the forming precision of machined parts are improved.
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Description

Technical field:

[0001] The invention relates to a flexible steel pad for multi-point forming, which is used for multi-point forming and multi-point stretching forming of three-dimensional curved surface parts, and belongs to the field of mechanical engineering. Background technique:

[0002] Multi-point forming is a new flexible forming method for sheet metal. This method replaces the traditional stamping die with a series of regularly arranged basic body lattices. The required forming surface is formed by adjusting the height of the basic body to realize the seamless shape of the sheet metal. mould, rapid and flexible prototyping.

[0003] During multi-point forming, it is easy to leave defects such as indentation and wrinkles on the sheet, which seriously affects the quality and appearance of the formed part. The indentation is formed by the local plastic deformation of the sheet due to the concentrated load on the basic body. Adding polyurethane backing plates on the u...

Examples

Embodiment Construction

[0026] The specific content and implementation of the present invention will be further described below in conjunction with the embodiments shown in the drawings.

[0027] A flexible steel pad for multi-point forming is mainly composed of an I-shaped steel pad 2 and a polyurethane plate with holes 3, and a plurality of I-shaped steel pads 2 and the polyurethane plate with holes 3 are assembled into one body. Before forming, the upper and lower basic unit 4 of the multi-point forming device is adjusted to a specified height according to the CAD digital model of the formed part. When forming, the basic unit 4 of the upper mold and the unit fixing plate 5 move downward, and the steel pad 2 rotates with the deformation of the plate, converting the vertical compressive stress applied by the basic unit 4 into a compressive stress perpendicular to the plate, so that the plate Deformation is produced while suppressing the occurrence of creasing and wrinkles. The integrated structure ...