| 摘要: | 摘 要
傳統的振動輔助方式，多為平行或垂直於工件表面的單軸向往復振動機制，垂直工件表面的振動輔助機制易造成研磨刮痕加深且不易得到鏡面效果，而平行工件表面易在同一表面出現重複研磨痕跡，造成表面研磨不均。
本研究是以驗證自行開發的行星機構結合二維振動輔助磁力研磨機制於不鏽鋼曲面凹槽上進行拋光，其主要目的是利用行星機構自轉與公轉的優點，使其表面形成高密度的交叉紋路外，還可達到省時節能又環保，進而達到高品質、高效率、低耗能的指標。
藉由控制磁極間距、振動平台振幅、鋼砂粒徑、SiC、重量、鋼砂重量、研磨液重量、振動平台頻率、磁極轉速…等一系列的實驗探討後，得知行星機構結合二維振動輔助機制能有效提昇表面品質與效率。
經由田口驗證實驗可以得知，對於平面表面粗糙度Ra 0.058μm的改善較佳參數組合為：磁極間距1mm、振動平台振幅0.1mm、鋼砂粒徑0.125mm、SiC重量3g、鋼砂重量0.5g*2、研磨液重量5g、振動平台頻率16.667Hz、磁極轉速(伺服轉速)500rpm(公轉156)。
對於曲面凹槽粗糙度Ra 0.058μm的改善較佳參數組合為：磁極間距0.5mm、振動平台振幅0.1mm、鋼砂粒徑0.125mm、SiC重量3g、鋼砂重量0.5g*2、研磨液重量5g、振動平台頻率16.667Hz、磁極轉速500rpm(公轉156)。
行星機構結合二維振動輔助磁力研磨加工法在較佳參數組合下，能有效改善平面不鏽鋼表面粗糙度由Ra 0.23μm改善至0.058μm，改善率達到74%；及改善曲面凹槽不鏽鋼表面粗糙度由Ra 0.22μm改善至0.058μm，改善率達到74%。由此可以證明行星機構結合二維振動輔助機制是能夠有效提升平面與凹槽表面的表面品質的。
關鍵字：行星機構、二維振動、不鏽鋼拋光、自轉與公轉
Abstract
The normal vibration directions of vibration-assisted magnetic abrasive finishing are all parallel or perpendicular to the surface of workpiece. It’s shortcomings are easily lead to more scratches on the surface, and difficult to obtain mirror effect.
A study of magnetic polishing for SUS304 with planetary bodies combined two-dimensional vibration. The main purpose of the planetary bodies of rotation and revolution characteristics, excellent surface morphology, and saving energy and time can also be reached. Series of experiments by controlling the working gap, the amplitude of the vibration platform, steel particle size and so on. This mechanism can enhance the surface quality and efficiency.
Taguchi experiment show that the combination of better parameters for the surface improvement : working gap 1 mm, the amplitude of the vibration platform 0.1mm, steel particle size of 0.125 mm , SiC weight of 3 g, steel weight of 0.5 g * 2, the weight of the slurry 5g, vibration platform frequency of 16.667Hz, magnet pole rotational speed 500 rpm (156).
For the curve improvement : working gap 0.5 mm, the amplitude of the vibration platform 0.1mm, steel particle size of 0.125 mm , SiC weight of 3 g, steel weight of 0.5 g * 2, the weight of the slurry 5g, vibration platform frequency of 16.667Hz, magnet pole rotational speed 500 rpm (156).
This mechanism can be effective in improving the stainless surface S.R. from Ra 0.23 μm to 0.058 μm, improvement rate was 74% and improving the stainless curve S.R. from Ra 0.23 μm to 0.058 μm, improvement rate was 74%. which can prove that planetary bodies combination of the two-dimensional vibration support mechanisms to improve quality.
Keywords: planetary bodies, two-dimensional vibration, polished stainless steel, rotation and revolution. |
