| Summary: | 碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 91 === Abstract
The tool steel is widely applied to mold and die, it is a kind of hardly cutting materials. The turning is usually used to machine columnar shape mold parts. That is important to select parameter before machining process, and it will directly affect product quality after machining process, if we can finish parameter design work quickly and exactly that will not only reduce manufacture time but also improve product quality.
The research use Taguchi method, take two different hardness tool steels (SKD11 and SKD61) to make Turning experiment with CNC lathe, then use precision measuring instruments to measure and record three quality characteristics (Section Area, Surface Roughness, and Roundness) results, apply parameter design with models of Section Area vs. Section Area Single Dynamic Quality Characteristic and Minimum Quality Loss Multiple Quality Characteristic, expect to rise the Geometric Accuracy of workpiece.
Experimental results showed that Taguchi method provides a simple, systematic, and efficient methodology for the optimization of the turning parameters. Turning with the optimization of Section Area vs. Section Area Dynamic Quality Characteristic model, the variation range reduces to 37.87%, and the Surface Roughness of workpiece are much better than initial condition. The result of Minimum Quality Loss Multiple Quality Characteristic model will be widely used to signal and multiple quality characteristic turning process. For much useful, the study have written operating interface program with Visual Basic software for that, it is helpful to get the optimum turning condition quickly and exactly for different quality intended.
Mold manufactures can refer above multiple quality characteristic model to establish computer parameter design database, the useful technical database will let the parameter design work become easily, quickly, and exactly. Furthermore effectively rise mold quality and reduce manufacture time in the same cost.
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