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Causes of deformation caused by aluminum alloy CNC machining workpieces
Apr 21, 2018

The precision of aluminum alloy CNC machining and the amount of shape deformation are proportional to the length and width ratio and the thickness of the wall thickness, and are directly proportional to the amount of material rigidity and stability. Therefore, during the design process, the part design Whenever possible, reduce the effect of these factors on the deformation of the workpiece.

Aluminum alloy CNC precision machining, especially in the structure of large parts, should be reasonable in its structure. Before processing, it must also strictly control the blank hardness, looseness and other defects to ensure the blank quality and reduce the deformation of the workpiece.

Causes of Deformation Caused by Precision Clamping Workpieces of Aluminum Alloy CNC

When the workpiece is clamped, first select the correct clamping point, and then select the appropriate clamping force according to the position of the clamping point. Therefore, as far as possible, the clamping point and the supporting point should be the same, so that the clamping force acts on the support. The clamping point should be as close to the processing surface as possible, and the position where the clamping force is not easily caused by the clamping force should be selected.

When there are several directions of clamping force on the workpiece, the order of the clamping force must be taken into consideration. The clamping force of the workpiece and the support should be applied first, and not too large, the main clamping force for balancing the cutting force. It should act later.

Second, increase the contact area between the workpiece and the fixture or use axial clamping force. Increasing the rigidity of the part is an effective way to solve the problem of clamping deformation, but due to the shape and structure characteristics of thin-walled parts, it has a lower rigidity. In this way, under the action of clamping force, deformation will occur.

Increasing the contact area between the workpiece and the fixture can effectively reduce the deformation of the workpiece when it is clamped. For example, when milling thin-walled parts, a large number of elastic press plates are used to increase the contact area of the contact parts. When turning the inner diameter and outer circle of the thin-walled sleeves, either simple opening transition rings or elastic mandrels are used. , The entire arc claws, etc., are used to increase the contact area when the workpiece is clamped.

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