A processing method for grid structure parts

Abstract

The invention discloses a processing method of a grid structure part, which comprises the steps of rough milling part, removing machining stress, milling reference, semi-finish milling part, removing machining stress, milling reference, fine milling part and drilling, Remove crafted edges. Among them, during rough milling, the processing is carried out in the order of: the first front rough milling, the back rough milling, and the second front rough milling. In the semi-finish milling and finish milling, the first milling is transferred to R and then the grid surface is milled. Proceed in sequence, install the wool on the reverse side and the two process sides in the middle for final processing, and when processing the reverse side of the two process sides, make it lower than the top surface of the reverse side of the part. The invention improves the processing technology of the parts, avoids overcutting at the junction R, improves the supporting rigidity of the parts, and improves the manufacturing precision and surface quality of the parts.

Description

technical field [0001] The invention relates to the technical field of blade cascade processing, in particular to a processing method for full-curved thin-walled grid structure parts. Background technique [0002] Figure 1 to Figure 3 It is a schematic diagram of a thrust reverser cascade part, which has a grid structure. like Figure 1 to Figure 3 As shown, the middle of the part is a grid structure, the left and right sides are the mounting edges, and there are 8 holes on the mounting edges. The part has the following characteristics during processing: [0003] First, all faces of such parts are curved surfaces, and there is no plane that can be used as a datum; [0004] Second, in general, the allowance at the transition R between the curved surface and the curved surface is larger than the surface allowance. The existing method is to process the curved surface and the transition R together. When the transition R is processed, the allowance suddenly becomes larger. It...

AI Technical Summary

Problems solved by technology

[0003] First, all surfaces of such parts are curved surfaces, and there is no plane that can be used as a datum;

[0004] Second, under normal circumstances, the margin at the transition R between the curved surface and the curved surface is greater than the margin of the curved surface. The existing method is to process the curved surface and the transition R together. When the transition R is processed, the margin suddenly becomes larger. It is easy to cause vibration of the knife, and then it is easy to cause overcut near the transfer R;

[0005] Third, all wall thicknesses of the parts are thin (2.5mm), and the rigidity of the parts is poor;

[0006] Fourth, the material of the part is aluminum alloy, which has the characteristics of fast deformation and large deformation, which makes it difficult to ensure the size; at the same time, the grid surface of the part needs to be connected with the front and back sides, and the existing processing methods do not fully stress the surface before finishing. released, resulting in splice marks on the grid surface

Images