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

(1) For parts with large machining allowance, in order to have better heat dissipation conditions during processing and avoid heat concentration, symmetrical processing should be used during processing. For example, if there is a 90mm thick sheet 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 will be processed in two times. The final size can ensure that the flatness reaches 0.3mm.

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

(3) If there are multiple cavities on the plate part, it is not advisable to use the sequential processing method of one cavity after another during processing. This may easily cause uneven stress on the part and cause deformation. Using layered processing for multiple times, try to process all the cavities at the same time on each layer, and then process the next layer to make the parts evenly stressed and reduce deformation.

(4) Deformation of thin-walled workpieces due to clamping during processing is unavoidable even if they are finished. In order to reduce the deformation of the workpiece to a minimum, you can loosen the pressing piece before finishing to reach the final size, so that the workpiece can freely return to its original shape, and then tighten it slightly until the workpiece can be clamped (completely According to the feel), this can achieve the ideal processing effect. In short, it is best to apply the clamping force on the supporting surface, and the clamping force should act in the direction of good rigidity of the workpiece. On the premise of ensuring that the workpiece does not loosen, the smaller the clamping force, the better.

(5) The order of cutting must also be paid attention to. Rough machining emphasizes improving processing efficiency and pursuing the removal rate per unit time. Generally, up milling can be used. That is, the excess material on the surface of the blank is removed at the fastest speed and in the shortest time to basically form the geometric outline required for finishing. The finishing process emphasizes high precision and high quality, so 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 the degree of deformation of the parts is also reduced.

(6) When processing parts with a cavity, try not to let the milling cutter penetrate directly into the part like a drill when processing the cavity. This will result in insufficient chip space for the milling cutter and poor chip removal, resulting in parts overheating, expansion, and Unfavorable phenomena such as knife collapse and breakage. First use a drill bit of the same size as the milling cutter or one size larger to drill the hole, and then use the milling cutter to mill it. Alternatively, CAM software can be used to produce a spiral cutting program.

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