3D打印技术在弧面凸轮精密制造中的应用研究

Application of 3D printing technology in precision manufacturing of globoidal cam

分别采用高速铣削加工和3D打印成形技术进行弧面凸轮的制造。实验结果表明:3D打印技术制造的凸轮在韧性上要优于高速铣削加工方式,而在硬度上略低;高速铣削加工的凸轮表面沿切削沟槽呈现脆性-延性混合断裂形貌,3D打印技术制造的凸轮加工表面相对平整,其表面粗糙度要小于高速铣削加工的凸轮试样的粗糙度;抗冷热疲劳性能及耐磨损性能,3D打印技术制造的凸轮要优于高速铣削加工技术。3D打印技术为型面结构较为复杂的、性能要求高的关键构件的制造提供有效的技术手段。

Globoidal cams were manufactured by using high speed milling and 3D printing technology,respectively. The experimental results show that the toughness of globoidal cam manufactured by 3D printing technology is better than that by high speed milling,but the hardness is slightly worse. The globoidal cam surface machined using high speed milling technology presents brittle-ductile fracture morphology along the cutting groove,and presents relatively flat using 3D printing technology,so the surface roughness of globoidal cam manufactured by 3D printing is much smaller than that by high speed milling. In terms of cold-heat fatigue resistance and wear resistance properties,the globoidal cam manufactured by 3D printing is better than that by high speed milling technology. The 3D printing technology can provide the effective technical means for manufacturing of the key components with more complicated surface structure and high performance requirements.