A method for incremental forming of sheet metal parts with non-cavity geometric features

Abstract

The invention relates to a method for progressive forming of sheet metal parts with non-cavity geometric features. The base material is clamped between the upper auxiliary material and the lower auxiliary material to form a three-layer structure, and the base material, upper auxiliary material, Lubricating oil is filled between the lower and auxiliary materials, and the surroundings of the upper and lower auxiliary materials are clamped and fixed by fixtures; the tool head is used to apply deformation force to the base material through the upper and auxiliary materials, and the incremental forming process is performed; the base material is formed into the After the components of the desired shape are removed, the upper and lower auxiliary materials are removed. Compared with the prior art, the present invention has the advantages of realizing progressive forming of materials with poor formability, realizing processing of sheet metal parts with non-cavity geometric features, and the like.

Description

technical field [0001] The invention relates to a sheet metal incremental forming method, in particular to a sheet metal incremental forming method with non-cavity geometric features. Background technique [0002] The shape accuracy, surface quality and forming limit of sheet metal incrementally formed parts are three important requirements. Dai et al. "Reduction of geometric deviation by multi-pass incremental formingcombined with tool path compensation for non-axisymmetric aluminum alloycomponent with stepped feature" (International Journal of Advanced Manufacturing Technology, 2019, https: / / doi.org / 10.1007 / s00170 -018-3194-0) through a large number of experiments to study the effect of process parameters on the shape accuracy of the part, and to reduce the geometric error by springback compensation through trajectory optimization. Ambrogio et al. proposed an empirical formula model for trajectory compensation in the document "An analytical model for improving precision i...

AI Technical Summary

Problems solved by technology

However, the double-point incremental forming requires special equipment, and the process is relatively complicated.

However, the above-mentioned traditional incremental forming method also has the following problems: 1. The incremental forming method is only suitable for materials with good formability, and for materials with poor formability such as hard aluminum alloys, titanium alloys or magnesium alloys. Breakage will occur directly during processing, and incremental forming cannot be used

2. The incrementally formed sheet is directly clamped by the fixture, and the edges are constrained, which limits the deformation range and makes it difficult to manufacture sheet metal parts with non-cavity geometric features

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