A Single-point Incremental Forming Process for Non-Axisymmetric Stepped Feature Forming Parts

Abstract

The invention relates to a single-point incremental forming technology for a non-axisymmetric step-feature forming part. The single-point incremental forming technology for the non-axisymmetric step-feature forming part comprises the steps that a planar sheet metal part is clamped in a suspended mode, a tool head is used for processing the sheet metal part into a forming part through a plurality of procedures, and the forming sequence of a stepped inclined surface is prior to the forming of a stepped plane. Compared with the prior art, the single-point incremental forming technology for the non-axisymmetric step-feature forming part has the advantages that a simple single-point incremental forming device is used and one-time clamping is achieved so that the sheet metal part with the non-axisymmetricsuspended step-feature is formed; the incremental forming of a complex-shaped sheet metal part can be achieved without the need of adopting a special double-point incremental forming equipment or of specially manufacturing a supporting mold; the single-point incremental forming technology for the non-axisymmetric step-feature forming part combines a multi-step forming and technological path compensation, reasonably controls the move of metal sheets, reduces the mutual influence between different parts, and forms the forming part which satisfies the geometric precision requirement.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a single-point progressive forming process for a non-axisymmetric stepped feature molding. Background technique [0002] Single-point progressive thermoforming has a short development cycle and low cost. It can replace traditional stamping forming in small batch production. Multi-pass forming brings more development to single-point progressive thermoforming. In the literature "Anew methodology formula-pass single point incremental forming with mixed toolpaths (CIRP Annals-Manufacturing Technology, 2011, 60(1): 323-326.)", Malhotra et al. proposed a combination of inside-out and outside-in multiple The pass forming process improves the forming limit and forming accuracy of the parts. In the literature "Tool path compensation strategies for single point incremental sheet forming using multivariate adaptive regression splines (Computer-Aided Design, 2013, 45(3): 575-590.)" by ...

AI Technical Summary

Problems solved by technology

The above single-point incremental forming method only improves the forming accuracy of axisymmetric tapered parts, and does not involve the forming of complex parts with non-axisymmetric features. In the fields of automobiles and aerospace, a large number of sheet metal parts have non-axisymmetric features. geometric features, so it is necessary to study incremental forming with non-axisymmetric geometric features

Images