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There are many reasons for the deformation of aluminum alloy parts during processing, among which the operation method is also one of the reasons in actual operation. Next, the Xiehe manufacturer will briefly introduce the operation skills of aluminum alloy parts processing.

(1) For parts with a large machining allowance, in order to have better heat dissipation conditions during the machining process and avoid heat concentration, symmetrical machining should be used during machining. If there is a 90mm thick plate that needs to be processed to 60mm, if one side is milled and the other side is milled immediately, and the final size is processed at one time, the flatness will reach 5mm; if repeated symmetrical processing is used, each side is processed twice to The final dimension can guarantee a flatness of 0.3mm.

(2) Reduce cutting force and cutting heat by changing the cutting amount. Among the three elements of cutting amount, the amount of back cutting has a great influence on cutting force. If the machining allowance is too large, the cutting force in one pass will not only deform the part, but also affect the rigidity of the machine tool spindle and reduce the durability of the tool. If reducing the amount of cutting knife on the back, the production efficiency will be greatly reduced. However, high-speed milling is used in CNC machining, which can overcome this problem. While reducing the back cutting amount, as long as the feed is increased accordingly and the speed of the machine tool is increased, the cutting force can be reduced while ensuring the processing efficiency.

(3) If there are multiple cavities on the sheet metal part, it is not suitable to use the sequential processing method of one cavity and one cavity during processing, which will easily cause uneven force on the part and cause deformation. Multi-layer processing is adopted, and each layer is processed to all the cavities at the same time as much as possible, and then the next layer is processed to make the parts evenly stressed and reduce deformation.

(4) Thin-walled workpieces are deformed due to clamping during processing, which is unavoidable even for finishing. In order to minimize the deformation of the workpiece, the pressing part can be loosened before the finishing machining is about to reach the final size, so that the workpiece can be freely restored to its original shape, and then slightly pressed, as long as the workpiece can be clamped (completely) According to the feel), so that the ideal processing effect can be obtained. In short, the best point of action of the clamping force is on the support surface, and the clamping force should act in the direction of good rigidity of the workpiece. Under the premise of ensuring that the workpiece is not loose, the smaller the clamping force, the better.

(5) The sequence of cutting should also be paid attention to. Rough machining emphasizes the improvement of machining efficiency and the pursuit of the removal rate per unit time. Generally, up-cut milling can be used. That is to remove excess material on the surface of the blank at the fastest speed and in the shortest time, and basically form the geometric profile required for finishing. While finishing emphasizes high precision and high quality, down milling should be used. Because the cutting thickness of the cutter teeth gradually decreases from the maximum to zero during down milling, the degree of work hardening is greatly reduced, and the degree of deformation of the parts is reduced at the same time.

(6) When processing parts with cavities, try not to let the milling cutter penetrate directly into the part like a drill bit when processing the cavity, resulting in insufficient chip space for the milling cutter and unsmooth chip removal, resulting in overheating, expansion and unfavorable phenomena such as broken knife and broken knife. First drill the hole with a drill bit that is the same size as the milling cutter or one size larger, and then mill with the milling cutter. Alternatively, CAM software can be used to produce the helical lower knife program.

The above content is the operation skills of aluminum alloy parts processing, I hope it can be helpful to everyone. If you want to know more about the processing of aluminum alloy parts, or customers who want to process aluminum alloy parts, please call the Xiehe processing factory, and we will serve you wholeheartedly.