Optimization quality study of cutting parameters for Cr-Mo alloy steel taking CNC machining tool shank as an example

• Main Authors: Jheng-Yu Chen, 陳政宇
• Other Authors: Lieh-Dai Yang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/rs95sj

碩士 === 南開科技大學 === 車輛與機電產業研究所 === 102 === The shank of CNC center machine tool is a major part which has to hold a cutting tool tightly when cutting, because the design requirement that shank needs to have following characteristics including high hardness, weariness, corrosion under high spindle speed. Simultaneously, in order to meet the design safety, shank also need to have high toughness and strength. SCM 415 is a low carbon chrome molybdenum alloy steel which is a popular material used to make shank with the above mentioned features, however SCM 415 material also had sticky and tough features when machined and could cause the chip with a difficult breaker feature. Secondly, high cutting temperature will make the tool with ease welding, heat transform, thermal wear cracking phenomenon, therefore this research is to explore and adopt a proper cutting tool considering cutting condition combination in order to reduce process cost and increase part quality. There are three types of cutting tool used in this study including SCM 415 with hard alloy, CVD coating, cermet, and experiments are carried out on CNC turning machine. In addition to measure and discuss cutting tool wear, chip break status and surface roughness, the optimal cutting condition are also figured out for the shank material (SCM415) which will be further applied in cutting tool industry and academics reference.