Aluminum parts processing technology to solve the problem of aluminum parts processing deformation（6）

4. Pay attention to the order of cutting. Rough machining emphasizes the improvement of machining efficiency and the pursuit of the removal rate per unit time. Generally, reverse milling can be used. That is to cut off the excess material on the surface of the blank at the fastest speed and the shortest time, and basically form the geometric contour required for finishing. The emphasis on precision machining is high precision and high quality, and down milling should be used. Because the cutting thickness of the cutter teeth gradually decreases from maximum to zero during down-milling, the degree of work hardening is greatly reduced, and at the same time, the degree of deformation of the parts is reduced.

　　 5. Thin-walled workpieces are deformed due to clamping during processing, and even finishing is unavoidable. In order to reduce the deformation of the workpiece to a minimum, the clamping piece can be loosened a little before finishing to reach the final size, so that the workpiece can be freely restored to its original state, and then slightly compressed, as long as the workpiece can be clamped (complete With the feel), this can get the ideal processing effect. In short, the point of action of the clamping force is best on the support surface. The clamping force should act on the direction of the workpiece rigidity. On the premise of ensuring that the workpiece is not loose, the smaller the clamping force, the better.

6. When processing parts with a cavity, try not to let the milling cutter directly pierce the part like a drill bit when processing the cavity, resulting in insufficient space for the chip cutter to accommodate chips and unsmooth chip removal, causing parts to overheat, expand and collapse Knife, broken knife and other unfavorable phenomena. The drill hole should be drilled with a drill of the same size or one size larger than the milling cutter, and then milled with the milling cutter. Alternatively, the CAM software can be used to produce the screw-down knife program.