关键词: 五轴数控机床, 打磨装置, 水驱动, 一体化加工, 3C产品加工

Abstract: After machining metal structural parts in the 3C industry using Computer Numerical Control (CNC) machine tool, their surfaces typically require additional grinding. However,the industry currently relies heavily on manual offline grinding,which is inefficient and results in inconsistent product quality. To address this,a water-driven grinding device integrated with the spindle of a CNC machining center was designed and implemented. This device used high-pressure cooling water at the spindle center as the sole driving force. On one hand,it drived the impeller and grinding components to achieve rotational machining;on the other hand,it used water jets for cooling,dust removal,and debris cleaning. This method achieved dual-purpose use of the grinding medium,simplified the structure,and improved the reliability of the device. Experiments were conducted on a five-axis CNC machine tool,using the D-side of a computer aluminum alloy as a sample. The results show that,under the same machining conditions,the device can reduce the surface roughness to 0.6 μm and shorten the grinding time to 120 s,more than doubling the efficiency compared to manual offline grinding. Compared with traditional pneumatic solutions,the water-driven grinding device exhibits significant advantages in dust control,noise suppression,and sandpaper life. The study verified the feasibility and efficiency of water-driven grinding,providing a new approach for integrated finishing technology in machining centers,and has high promotion and application value.

Key words: five-axis CNC machine tool, grinding device, water-driven, integrated machining, 3C product manufacturing