A CNC Machining Method for Controlling Machining Deformation of Large Aluminum Alloy Wall Panel Parts

Abstract

The invention discloses a numerical control processing method for controlling the processing deformation of large aluminum alloy wall plate parts, which comprises the following steps: 1) before processing, measuring the deformation of the part blank to determine the concave surface and the convex surface of the part blank; The concave surface of the part blank is used for trimming, so that the concave surface of the part blank has a slight rebound, and the concave surface of the part blank is used as the smooth surface of the large aluminum alloy siding part; 3) The convex surface of the part blank is used as the large aluminum alloy siding part The frame surface is then processed to form the frame of the convex surface of the part blank to obtain large aluminum alloy siding parts. The invention uses the deformation of the blank itself to offset the deformation of some parts after processing, and reduces the gap between the material removal amount between the smooth surface and the frame surface, thereby reducing the warping deformation of the parts to the frame surface after processing, and reducing the subsequent rolling deformation. The difficulty of bending and forming can improve the efficiency of rolling and bending, and shorten the manufacturing cycle of large wall plate parts, which is suitable for wide application.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy cutting and processing, in particular to a numerical control processing method for controlling the processing deformation of large aluminum alloy wall plate parts. Background technique [0002] Aluminum alloy siding parts are an important aircraft structural part. Its typical structural form is smooth on one side and framed on the other. The parts have large dimensions in the length and width directions and small dimensions in the thickness direction. With the improvement of aircraft performance, wall panel parts are developing in the direction of large-scale and high-precision, which brings about an increase in the difficulty of CNC machining. Under the existing CNC machining method, the clamping scheme of the wall panel parts adopts the clamping method of vacuum adsorption tooling as the main tooling, and the pressing plate as the supplementary clamping method. Surface finishing, smooth ...

AI Technical Summary

Problems solved by technology

The large amount of warping deformation brings greater processing difficulty to the subsequent roll forming of the wall plate parts, which makes the roll forming efficiency low and the overall processing cycle of the parts increases

[0003] Due to the structural characteristics of one side smooth surface and one side frame surface, the wall panel parts, such as figure 1 , figure 2 As shown, the amount of material removal on the frame surface is much larger than that on the smooth surface, resulting in warpage and deformation of the part after processing to the side where more material is removed, that is, the frame surface

The blanks of wall panel parts are large-sized thin sheets. Due to the large size in the length and width directions and too thin thickness, the blank sheet itself has certain warping deformation, such as image 3 As shown, the existing processing methods do not distinguish the initial deformation of the blank, which also has a certain impact on the final deformation of the part after NC machining

[0004] In the existing numerical control machining of aluminum alloy wall plate parts, the problem of excessive deformation of the parts after processing is rarely considered, and it often relies on subsequent roll forming, which has caused great trouble to the roll bending process.

Images