5 Steps To Improve Dimensional Stability In CNC Aluminum

Eliminate the internal stress of the material
The common way to eliminate internal stress is to use natural or artificial aging and vibration treatment. Secondly, Cutting the excess parts in advance and continuing to process after 1-2 hours of natural aging can also eliminate the deformation caused by internal stress.

Improve the clamping method of the workpiece
For the CNC mill processing of thin-walled aluminum parts with poor rigidity, the following clamping methods can be used to improve the machining accuracy: Use suction cups to distribute clamping force evenly along with the thin plate; Fill the inside of the workpiece with a medium to improve rigidity.

Improve the cutting ability of the tool
The material and geometric parameters of the tool have an important influence on the cutting force and cutting heat. The correct selection of the tool is essential to improve dimensional stability.

Choose a reasonable machining process
The CNC high-speed machining process is generally: rough machining – semi-finish machining – clear corner machining – finishing. For parts with high precision requirements, it is necessary to increase the number of semi-finishing machining and retain a uniform machining allowance.

Use appropriate methods of operation
Choose the right feed speed, spindle speed, and cutting depth; Symmetrical machining for the front and back of the workpiece; Multi-layer machining for all cavities of the workpiece; Use drilling and then milling when machining parts with a cavity.