The Study of Optimal End Mills Design for Milling 7075 Aluminum Alloy

• Main Authors: CHEN, GUAN-JIE, 陳冠傑
• Other Authors: LEE, BEEN-YIN
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/x533dt

碩士 === 國立虎尾科技大學 === 機械與電腦輔助工程系碩士班 === 106 === With the progress of science and technology, product size and tolerance requirements are getting finer. There must be new breakthroughs in the requirements for dimensional accuracy and processing technology. Need to consider material properties, correct handling methods, etc. Good craftsmanship depends on the use of the right tools. All processing and production must have appropriate tools to do more with less. This paper uses cutting machining as an example to design the material properties of the cutting tool and the objectives to be considered. In order to achieve this goal, it is also possible to reduce the wear of the tool during machining. Compared with steel, aluminum alloy has a lower rigidity, but it is lighter than steel. It has excellent material strength, formability, and corrosion resistance. Therefore, aluminum alloys are widely using in aerospace parts, automobile wheels, bicycle racks, 3C electrical products, etc. Therefore, this experiment using for cutting experiments of aerospace aluminum alloy and 3C products. For the processing object, the surface roughness of the cutting edge after grinding is mainly select, and the four factors of the main cutting tool are select. The L9 Taguchi orthogonal array is used for preliminary analysis of tools with different tool geometries and for cutting. Then according to the experimental results of the L18 Taguchi orthogonal array, the tool geometry is sorted for final analysis and verification. The smallest amount of tool wear and the best surface finish after machining. From the first stage experiment L9 Taguchi orthogonal array test, the axial cutting angle not too large, the cutting edge of 20um or more during cutting, the surface roughness range is 0.6um, and second stage The L18 Taguchi Straight array has an optimum axial edge wear of 6.064um for the selection factor and angle range improvement. After processing, the surface roughness of the workpiece was reducing to 0.55 um, which was significantly improved.