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How to reduce the problem of deformation in the processing of aluminum alloy metal stamping parts

by:Fortuna     2021-03-07
Stamping manufacturers are producing metal stamping parts of various materials, and sometimes they have deformation problems. Among them, aluminum alloy stamping parts have a relatively large thermal expansion coefficient, which will increase this deformation. So how to reduce the deformation in the processing of aluminum alloy metal stamping parts? The following is a brief answer for you. The reasons for the deformation include the material of the part, the shape of the part, the production condition and the performance of the cutting fluid. It is manifested as the deformation caused by the internal stress of the blank during the stamping process with the mold, the deformation caused by the cutting force, the deformation caused by the cutting heat, and the deformation caused by the clamping force. . 1. Reduce the internal stress of the blank. Natural or artificial aging and vibration treatment can partially eliminate the internal stress of the blank. Pre-processing is also an effective process method. For larger blanks, due to the large margin, the deformation may increase after processing. , If the excess part of the blank is processed first, the margin of each part is reduced, and placed for a period of time in advance, it can not only release a part of the internal stress, but also reduce the deformation during processing; 2. Reasonably select the geometric parameters of the tool to improve the tool’s performance Cutting ability; the material and geometric parameters of the tool have an important influence on the cutting force and cutting heat. The correct choice of the tool is very important to reduce the deformation of the parts; 3. Adjust the clamping method of aluminum alloy stamping parts; for the thinner with poor rigidity If a three-jaw self-centering chuck or spring chuck is used to clamp the aluminum alloy workpiece from the radial direction, the workpiece will inevitably be deformed once it is released after processing. 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. The clamping deformation can be avoided when the outer circle is processed, so that satisfactory processing accuracy can be obtained. When processing thin-walled and thin-plate workpieces, vacuum suction cups are used to obtain evenly distributed clamping force, and then processed with a small cutting amount, which can well prevent the deformation of the workpiece. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automotive stamping parts molds Learn more: Points to note in the design of continuous stamping dies
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