How To Improve Dimensional Stability In CNC Aluminum Machining

DALIAN, China - April 28, 2024 - PRLog -- Eliminate The Internal Stress Of The Material

Aluminum stock material may contain internal stresses that can cause deformation during machining. Pre-treating the material through stress-relieving processes like annealing or thermal stabilization can help minimize residual stresses and improve dimensional stability.

A common method for eliminating internal stress in aluminum parts is to use natural or artificial aging and vibration treatment. Natural aging refers to placing the workpiece under natural conditions such as outdoors, so that the internal stress of the workpiece is naturally released, thereby eliminating or reducing the residual stress. Artificial aging is a man-made method, usually heating or freezing treatment to eliminate or reduce the micro-stress and machining residual stress in the workpiece after quenching to prevent deformation and cracking.

Improve The Clamping Method Of Workpieces

Securely fixturing the workpiece is essential to prevent vibration and movement during machining. Well-designed fixtures with adequate clamping force and support can enhance stability and accuracy, particularly for complex or thin-walled parts.

If a three-jaw self-centering chuck or spring chuck is used to radially clamp a thin-walled CNC machined bushing component, the workpiece will undoubtedly deform once released after machining. Therefore, an axial end face compression method with good stiffness should be used. According to the location of the inner hole of the part, make a threaded mandrel to find the inner hole of the part. It should be inserted into the inner hole of the part. The end face and cover plate are pressed tightly, and the nut is tightened backward to prevent loosening and deformation when processing the outer circle and achieve processing accuracy.
The Whole Post at https://www.sansmachining.com/how-to-improve-dimensional-...