| Summary: | 碩士 === 國立宜蘭大學 === 機械與機電工程學系碩士班 === 106 === In the cutting process, the use of hard material tools, acting on the workpiece, remove excess material, metal cutting processing is a common and basic way in the industry. This study use carbide cutting tools to do cutting test on medium carbon steel(S45C). The goal is to find out the cutting force and roughness average when using different side cutting edge angle and nose radius to cut medium carbon steel , and to record influences of cutting characteristics when using various cutting tool angles. In this study, researcher used six different side cutting edge angles with three different nose radii as the test cutting tools, and use 3-dimensional dynamometer to measure cutting force in this test. According to the experimental result, the increasing of side cutting edge angle is helpful for the decreasing of cutting of cutting force, In this experiment, the side cutting angle with the minimum cutting force was 15°.The increasing of nose radius will also heighten the cutting force, but is helpful for decreasing the roughness average. However, for a side cutter with a corner angle of 15°, it is easy to make the tool vibrate due to the increase of nose radius. In this experiment, the side cut corner angle was 15° and the nose radius R=0.3 mm had the best surface roughness at shallow depths of cut.
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