Photocurable polymer components fabricated via 3D printing often exhibit rough surfaces and visible layer marks due to the inherent characteristics of additive manufacturing. Consequently, post-processing is frequently required to improve the external appearance of the final product. Since surface finishing is typically performed through machining, the appropriate selection of machining parameters is critical to prevent thermal-induced surface damage, particularly given the low heat-deflection temperature of polymer materials. Moreover, the mechanical properties of photocurable resins vary depending on resin composition and curing conditions, which also affect machinability. Therefore, baseline machining experiments are necessary to determine the optimal post-processing conditions for printed components. In this study, machining experiments were conducted on polymer specimens fabricated using a DLP (Digital Light Processing) system by varying spindle speed, feed rate, and depth of cut to optimize surface finishing conditions. The results indicate that the most improved surface roughness, approximately Ra 0.4 μm, was achieved under the conditions of 20,000 RPM spindle speed, 60 mm/min feed rate, and 100 μm depth of cut. This represents a 14-fold improvement compared to the pre-machining surface roughness. These optimized conditions are expected to be applied to the post-processing of porous scaffold core molds in future work.

Abstract
1. 서 론
2. 실험방법
    2.1 가공시스템 및 셋업
    2.2 피삭재 준비 및 절삭공구 선정
    2.3 가공실험 설계
    2.4 실험방법
3. 실험결과 및 분석
    3.1 가공조건에 따른 표면거칠기
    3.2 가공조건에 따른 공구 마모
4. 결 론
후 기
References

• 이현화(Senior Researcher, Digital Manufacturing Division, Korea Mold Technology Center) | Hyeon Hwa Lee Corresponding author
• 김미애(Korea Institute of Industrial Technology.) | Miae Kim
• 김기범(Korea Institute of Industrial Technology.) | Ki Beon Kim
• 손정상(Korea Institute of Industrial Technology.) | Jeong Sang Son