刀具切削壽命最佳化參數探討

• Main Author: 梁榮濱
• Other Authors: 李金山
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/41452178021787114423

碩士 === 建國科技大學 === 自動化工程系暨機電光系統研究所 === 95 === The tool wear and damage and the methods of tool life management are very important parts of the quality control for manufacturing engineering. If the life-span of the tool was predicted correctly,engineers can be prepared to change the tool in advance, and the size and quality of the products can be maintained. As a result, the frequency of machine stopping was greatly reduced and the utilization ratio of the tool was increased. This study aimed to identify the life-span of a cutting tool,the work-piece (SKD11) made from molded steel given subzero treatment to reach 58 HRC hardness. The tool was made of nitrogen aluminum titanium (TiAlN) containing 12 % of cobalt. Theφ6 mm end milling ( four-flute ) was used to cut the work-pieces. The experimental processing parameters were (1) spindle revolutions from 2500 rpm to 3500 rpm；(2) feed rate, from 200 to 300 mm / min； (3) depth of cut, from 0.1 to 0.3 mm； and (4) cutting stepover, from 50 % to 70 %. These parameters are considered as controlling factors. All cutting experiments used forced air to cool the parts. The DOE of Taguchi method was applied to find out the optimal parameters. An additional cutting process was used to test the validity； the result was very close to the prediction of Taguchi method. The experimental results also show the relationship between cutting times, the maximum removed volume of the work-pieces and tool wear. The study demonstrated that engineers can use these optimal process parameters to predict the wear of tool and process times to decide on the optimal time to change the worn tool.