| Summary: | 碩士 === 國立勤益科技大學 === 機械工程系 === 102 === Milling process is widely used in machining, if occur chatter phenomenon in machining process, it will seriously affect the quality of the workpiece, production efficiency, tool damage, machine reliability and service life. Develop inhibition of chatter technology in industry is very important, actually, industry technique can predict and avoid chatter, this tecnique is construct Stability Lobes Diagram. So, construction accurate and stable Stability Lobes Diagram is core technology, Cutting Coefficient and (Frequency Response Function, FRF) is important parameter index to construct an accurate of the Stability Lobes Diagram.
This study start with the cutting force coefficient, and using AL6061-T6 and S45C to planning experiments (Standard Operating Procedures, SOP) obtain cutting force. Also investigate effect of the feed rate on the cutting force, compare with the data reproducibility and filter, identification of cutting force and cutting force coefficient the establishment of database. Finally, accurate cutting force coefficient with impact test obtains frequency response functions, construction of Stability Lobes Diagram.
According cutting force data, analysis the relationship with the tool and cutting force, compare with feed rate of 200 and 400 (mm/min), can get faster feed rate, cutting forces also increase.The noise also cause experiments identification errors, so, develop filter software to remove noise. In cutting force identification part, the results shows the differences in the theoretical value, the experimental value and differential value is very small and the trend is similar to verify the accuracy of the cutting force coefficients. In cutting force coefficient, observe increase the radial cutting force feed rate is decrease, but tangent cutting forces is increase, Predict the shear stress and radial cutting force coefficient decreased slightly, when friction angle rise, the tangent cutting force coefficient increases. Finally, using cutting force coefficient assign frequency response functions to drawing Stability Lobes Diagram, provide the company and client design cutting chatter, machine detection and maching parameters importance reference.
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