Due to the clamping deformation of the alloy aluminum plate workpiece during the machining process, it is difficult to avoid or even finish machining. In order to minimize the deformation of the workpiece, it is necessary to reach the final size before completion, release the pressing part to make the workpiece return to the initial state freely, and then lightly press to clamp the workpiece (fully manual) to achieve the desired processing effect. In short, the clamping force is best applied to the supporting surface. The clamping force should act in the direction of good rigidity of the workpiece. Under the premise of ensuring that the workpiece does not loosen, the smaller the clamping force, the better.
What are the operating techniques for alloy aluminum plates that can reduce deformation problems during processing? There are many reasons for the deformation of 5052 alloy aluminum plate during processing, which are related to the material, the shape of the parts and the production conditions. Due to the large thermal expansion coefficient of aluminum sheet, it is easy to deform during thin-wall processing. In actual operation, the operation method is also very important, so what are the operation techniques for reducing the deformation of the 5052 aluminum alloy plate?
The alloy aluminum plate can reduce the cutting force and cutting heat by changing the cutting parameters. Among the three main cutting parameters, the reverse draft has a great influence on the cutting force. If the machining allowance is too large and the cutting force is too large, it will not only cause deformation of the parts, but also affect the rigidity of the machine tool spindle and reduce the durability of the tool. If the amount of tool return is reduced, the production efficiency will be greatly reduced. However, high-speed milling in CNC machining can solve this problem. At the same time, as long as the feed rate and the speed of the machine tool are increased accordingly, the cutting force can be reduced while ensuring the processing efficiency.
The order of the cutters should also be noted. Rough machining emphasizes the need to improve machining efficiency and pursue the cutting speed per unit time, and can usually be used for upper milling. That is to cut the surface of the blank with the fastest speed and the shortest time to form the basic geometric contour required for finishing. The focus of finishing is high precision and high quality, which is suitable for milling processing. As the cutting thickness of the teeth gradually decreases from the maximum value to zero during the milling process, the degree of work hardening is greatly reduced, and the degree of deformation of the parts is also reduced.
Try not to allow the milling cutter to drill directly into the parts in the machining cavity. As a result, the chip space of the milling cutter is insufficient, and the chip discharge is not smooth, which leads to parts overheating, expansion, tool breakage, and other undesirable phenomena. Drill holes with a milling cutter of the same size or larger, and then mill with a milling cutter. Or, you can use CAM software to make a spiral cutter program.