砂輪用之非接觸式不平衡檢知與線上自動調校系統

A System of Non-contact Unbalance Detection and On-line Automatic Adjustment for Grinding Wheels

砂輪研磨是精密加工的有效方法，然而砂輪的不平衡將引起振動，且對磨削過程造成很大的影響，嚴重制約著磨削表面品質和精度。傳統的砂輪平衡方法是靜平衡，這種平衡方法是離線的且費時。本研究為了改善此費時又沒有效率的方法，設計一套非接觸式不平衡檢知與線上調校系統。本系統由配重孔槃、變位感測模組、PC_Based控制器及噴膠裝置所組成。使用本系統時，砂輪不需取下，由變位感測模組即可測出砂輪的不平衡位置及不平衡量，並且以噴膠裝置做自動調校。本系統經測試，其不平衡減少率可達77%，且達ISOG1至G2.5之間的動平衡等級。

Grinding is an efficient method for precise processing. However, unbalance in a grinding wheel makes vibrations and causes great disturbance that decreases the surface quality and the precision. The traditional balance method is the adjustable-pitch balance. Such a balance method is off-line and time-consuming. In this paper, a system of non-contact dynamic unbalance detection and on-line automatic adjustment is proposed for improving the above time-consuming and inefficient method. The system consists of a weighting plate, variation detection modules, a PC-Based controller and spray devices. It can directly detect the quantity and position of unbalance using variation detection modules without taking grinding wheels out of service and can adjust the unbalance using on-line spray devices. The system is tested. The performances show that the unbalance reduction rate can be up to 77 % and the balance level comes to between ISO G1 and G2.