Three typical case studies were presented, together with the answers to the questions and further questions. Verification: What criteria are to be used to verify? In this process the questions are asked, requiring answers so that engineering students can be trained to scrutinise their research ideas and maximise the benefits.Ĭurrent status: How was it done by others? This paper proposes a critical thinking process called IDEA, based on seven questions. They are not trained in a systematic critical thinking process however, and this prevents the generation of creative ideas leading to a successful outcome. Most engineering students are well trained in the technical skills to solve commonly known problems in research projects. The correct initial focus for proposed engineering research ideas is critical to achieving the maximum benefit from the research project. Proc IMechE, Part B, J Engineering ManufactureĢ022, Vol 236(9) 1232-1246 Seven questions focus research thinking Title: Geometric definition, rapid prototyping, and cutting force analysis of cylindrical milling tools with arbitrary helix angle variationsĪuthors: Chigbogu Ozoegwu and Peter Eberhard Following this sample, tools were manufactured to show the feasibility of using this analysis to manufacture sample tools using rapid prototyping techniques.Ī cutting force model was also generated for non-uniform helix angle tools, which showed significant calculated cutting force reduction – compared with tools of a fixed helix angle – of 40-60% depending on the depth of cut. This paper analyses the geometry of non-uniform helix angle tools. However, it was thought that the manufacture of tools with non-uniform helix angles would be extremely difficult. Previous reported papers have suggested that the use of tools with non-uniform helix angles would result in reduced cutting forces and the suppression of chatter. The function of the flute helix angle is to elongate the duration and length of contact between the tool flutes and the workpiece, hence promoting a smoothing of the cutting process. Invariably this helix angle is uniform across the flutes. Search our library and digital resourcesĬutting tools with variable helix angles promise reduced cutting forcesĬommonly used multiple flute cutting tools feature the flutes at a helix angle.
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