High-symmetry-degree machining method for aluminum thin-wall cavity part

The invention relates to a high-symmetry-degree machining method for an aluminum thin-wall cavity part, a special tool is used for fixing the part and a workbench, and the high-symmetry-degree machining method comprises the steps that S1, the special tool is fixed to the workbench; s2, the thin-wall cavity part is positioned on the base plate, and the two sides of the thin-wall cavity part are clamped between the clamping block and the positioning block; s3, one face of the thin-wall cavity part is gradually pressed by the pressing plate and the pressing block; s4, establishing a zero point coordinate system; s5, a positioning groove or a positioning boss at one end of the thin-wall cavity part is machined through the alloy end mill layer-by-layer milling process mode; s6, the four-axis workbench rotates by 180 degrees, and a positioning groove or a positioning boss at the other end of the thin-wall cavity part is machined through the alloy end mill layer-by-layer milling process mode; the clamp has the benef