Two-Dimensional Cutting of Polycrystalline Diamond and CBN Tools and Dies using a Novel Laser/Waterjet Hybrid Manufacturing Process

使用新型激光/水射流混合制造工艺对多晶金刚石和 CBN 工具和模具进行二维切割

• 批准号: 1000035
• 负责人: Pranav Shrotriya
• 金额: $ 37.57万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2014-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1000035&HistoricalAwards=false
• 关键词: Two; Dimensional; Cutting; Polycrystalline; Diamond

The objective of this project is to test the following two hypotheses: 1) the combined action of laser and waterjet will result in development of tensile stresses perpendicular to cutting path and propagation of cracks along cutting path during the two-dimensional cutting and 2) if the material removal mechanism were changed from thermal melt and evaporation (laser cutting) or material erosion (electrical discharge machining) to material separation through crack propagation, then smaller kerf; parallel walls; higher cutting speed and substantial energy savings can be attained in the machining of two-dimensional profiles of polycrystalline diamonds and polycrystalline cubic boron nitride over conventional machining processes. The project's approach is to test the hypotheses relies on fundamental fracture mechanics modeling and experiments to investigate controlled fracture of superhard materials due to thermal and chemical effects of laser heating and waterjet quenching.Successful completion of the research activities will lead to a novel machining method for brittle materials along with a detailed understanding of the fundamental underpinnings behind this new process. This novel hybrid manufacturing process will have potential to offer high performance tools and dies for metal cutting and wire drawing industries respectively. Automotive, woodworking and other industries that use synthetic diamond tools would greatly benefit from this research. Education and outreach outcome will include training of graduate students in advanced manufacturing research, assimilation of the research outcomes into new course modules, the involvement of undergraduates from underrepresented groups in the research team and the dissemination of the research results through journal publications, conferences and industry visits and workshops.

The objective of this project is to test the following two hypotheses: 1) the combined action of laser and waterjet will result in development of tensile stresses perpendicular to cutting path and propagation of cracks along cutting path during the two-dimensional cutting and 2) if the material removal mechanism were changed from thermal melt and evaporation (laser cutting) or material erosion (electrical discharge machining) to material separation through crack propagation, then smaller kerf;平行墙；在传统加工过程中，可以在多晶钻石和多晶立方硼氮化物的二维曲线和多晶立方硼的二维曲线加工中加工较高的切割速度和大量节能。 该项目的方法是测试假设依赖于基本断裂力学建模和实验，以调查由于激光加热和水夹子淬灭的热和化学作用而导致的超端材料的受控裂缝。成功完成研究活动的完成将导致一种新颖的材料加工方法，并详细地理解了对基础上的详细介绍，这是对基础上的纯正效果。 这个新型的混合制造过程将有可能分别提供用于金属切割和电线工业的高性能工具和死亡。 使用合成钻石工具的汽车，木工和其他行业将从这项研究中受益匪浅。 教育和外展成果将包括在高级制造研究中培训研究生，将研究成果吸收到新课程模块中，研究团队中代表性不足的群体的本科生的参与以及通过期刊出版物，会议，会议，行业访问和行业访问和工作坊来传播研究结果。