- 學位論文
具溝槽紋路砂輪對磨削硬脆材料之研究
A study on grinding brittle material with pattern-dressed wheel
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摘要
硬脆材料高硬度的特性令其在使用傳統砂輪加工效率不佳，多利用鑽石砂輪進行磨削加工。比磨削能為廣泛用來衡量加工效率的指標，根據相關理論與比磨削能計算公式，磨削之比磨削能隨著砂輪磨削面積改變，降低砂輪表面積可有效提升比磨削能；現有研究成果則顯示砂輪表面形貌與磨削加工結果之間具有高度相關，於砂輪表面修整出溝槽除提升比磨削能外，更可達到降低磨削熱之效果。為了使傳統砂輪提升磨削效能，降低鑽石砂輪於製程中之使用量，本研究的目的為使用經特別修整後之傳統砂輪進行磨削加工，從軟材到硬脆材料，以比磨削能為指標，探討不同修整方法對於提高硬脆材料磨削加工效率的效果。本研究結果顯示，經過特別修整後之傳統砂輪能提升對硬脆材料之材料移除率，在切深20μm以下使用菱格狀修整，20μm以上則使用溝槽狀修整能得到較佳之材料移除率。
並列摘要
The high hardness property of brittle materials make it hard to machining with traditional grinding wheels ,so it usually uses diamond grinding wheels to improve the poor processing efficiency. Specific grinding energy is an indicator used to measure processing efficiency widely, According to the theory and specific grinding energy formula, the specific grinding energy in grinding process is changed as grinding wheel surface changed, reducing the surface area of the grinding wheel can effectively enhance the specific grinding energy; The existing studies show a high relation between the surface topography of grinding wheels and the grinding results. Conditioning grooves on grinding wheels not only enhance the specific grinding energy, but also achieve the effect of reducing the heat during the grinding processes. In order to reduce the amount of diamond grinding wheel used in the manufacturing process, to reach the goal of reducing costs, the purpose of this study is using conventional grinding wheels after the special conditioning in grinding processes, from soft materials to brittle materials, as the specific grinding energy an indicator, to study the different method of dressing improve the efficiency of grinding brittle materials. The results of this study show that, the traditional grinding wheel after dressing especially can improve the removal of brittle materials, at the cutting depth 20μm or less using the rhombic pattern, at 20μm or more, then using groove-like pattern can be better of the material removal rate.
參考文獻
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