研究目的
To simplify the manufacturing of cutting dies used in the packaging industry by using laser material processing to post-process additively manufactured cutting edges to achieve a defined final profile shape.
研究成果
The study successfully demonstrated the post-processing of additively manufactured cutting edges by laser ablation, achieving target profile shapes within tolerances and comparable surface roughness to conventional cutting edges. The method allows for dimensionally accurate profile shape generation and surface finishing in a single process step without additional sensor technology.
研究不足
The study is limited to linear cutting edges and does not evaluate the potential for producing undercuts or the applicability to curved and rectangular contours. The relationship between the optimum angle of incidence and the angle of aperture needs further investigation.
1：Experimental Design and Method Selection:
The study involves the use of Selective Laser Melting (SLM) for additive manufacturing of cutting edges and laser ablation for post-processing to achieve the desired profile shape and surface roughness.
2：Sample Selection and Data Sources:
Specimens are built on conventional sheet metal substrates using tooling steel
3：2709 powder and stainless steel 4301 as the substrate material. List of Experimental Equipment and Materials:
A commercially available SLM machine with a 200 W continuous wave fiber laser and a ns-pulsed fiber laser with 200 W average output power for laser ablation.
4：Experimental Procedures and Operational Workflow:
The process includes SLM manufacturing of near-net shape profiles on sheet metal, followed by laser ablation with variations in angle of incidence, pump current, and scanning patterns to achieve the target profile shape and surface roughness.
5：Data Analysis Methods:
The post-processed cutting edges are evaluated regarding cutting angle and surface roughness using a confocal laser scanning microscope and an optical microscope.
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