Preparation method of large-depth special-shaped curved-surface aluminum alloy box-like piece and mold of piece

Abstract

The invention provides a preparation method of a large-depth special-shaped curved-surface aluminum alloy box-like piece and a mold of the piece. The method includes the steps of placing the mold of the large-depth special-shaped curved-surface aluminum alloy box-like piece on an upper platform and a lower platform; according to the size of the to-be-formed large-depth special-shaped curved-surface aluminum alloy box-like piece, calculating the set unfolding size and volume of a blank; heating the mold of the large-depth special-shaped curved-surface aluminum alloy box-like piece to a set temperature; placing the blank in a section cavity and adopting positioning pins for positioning the blank; after the blank is constantly subjected to heat preservation for a certain time period in the section cavity, using the upper platform for driving a protrusive die to move and press the blank; after hot compacting and forming of the blank, using the upper platform for driving the protrusive dieto move for mold opening of the large-depth special-shaped curved-surface aluminum alloy box-like piece; using the protrusive die to drive a material jacking plate to move to jack out the large-depthspecial-shaped curved-surface aluminum alloy box-like piece; conducting welding on openings in the four vertical edges of the large-depth special-shaped curved-surface aluminum alloy box-like piece. The problem that large-depth special-shaped curved-surface aluminum alloy box-like pieces cannot be demolded or are difficult to demold is solved.

Description

technical field [0001] The invention relates to the field of precision sheet metal processing, in particular to a method for preparing a large-depth special-shaped curved aluminum alloy box-shaped part and a mold thereof. Background technique [0002] Due to its excellent performance, aluminum alloys are widely used in aerospace, rail transit, weaponry and other fields. In the field of rail transit, large-size aluminum alloy parts are developing toward integration and near-net shape. [0003] For the large-depth non-draft shaped aluminum alloy box-shaped parts, there are two conventional manufacturing methods: one method is direct stretching, this method has a hard-to-deform area, resulting in serious thinning of the part after forming, and prone to cracking And wrinkling and other defects, and the wall thickness distribution is uneven, in addition, it is difficult to demould the parts after forming; another method is to form part of the sheet metal first, and then carry ou...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method for preparing a large-depth special-shaped curved surface aluminum alloy box-shaped part and its mold, so as to solve the problem of difficult deformation in the conventional manufacturing method, resulting in serious thinning of the part after forming, and defects such as cracking and wrinkling. , and the distribution of wall thickness is uneven. In addition, it is difficult to demould the part after forming, and the formed part has a large rebound, and the welding deformation is difficult to control, which has a great impact on the accuracy and quality of the part.

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