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Process measures and operating skills to reduce deformation of aluminum processing
Pubdate:
2021-12-24
There are many reasons for the deformation of aluminum parts, which are related to the material, the shape of the parts, and the production conditions. There are mainly the following aspects: deformation caused by internal stress of the blank, deformation caused by cutting force and cutting heat, and deformation caused by clamping force.
For thin-walled aluminum workpieces with poor rigidity, the following clamping methods can be used to reduce deformation:
①For thin-walled bushing parts, if a three-jaw self-centering chuck or spring chuck is used to clamp from the radial direction, once it is loosened after processing, the workpiece will inevitably be deformed. At this time, the method of pressing the axial end face with better rigidity should be used. To locate the inner hole of the part, make a self-made threaded through mandrel, sleeve it into the inner hole of the part, press the end face with a cover plate on it, and back it with a nut. When machining the outer circle, the clamping deformation can be avoided, so that satisfactory machining accuracy can be obtained.
②When processing thin-walled and thin-plate workpieces, it is best to choose a vacuum chuck to obtain a uniform clamping force, and then process it with a smaller cutting amount, which can well prevent the deformation of the workpiece. In addition, a packing method can also be used. In order to increase the process rigidity of thin-walled workpieces, medium can be filled inside the workpiece to reduce the deformation of the workpiece during clamping and cutting. For example, pour the urea melt containing 3% to 6% potassium nitrate into the workpiece, and after processing, immerse the workpiece in water or alcohol to dissolve the filler and pour it out.
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Process measures and operating skills to reduce deformation of aluminum processing
There are many reasons for the deformation of aluminum parts, which are related to the material, the shape of the parts, and the production conditions. There are mainly the following aspects: deformation caused by internal stress of the blank, deformation caused by cutting force and cutting heat, and deformation caused by clamping force.