SEM722: Topic of Additive Manufacturing - Subtractive Manufacturing processes - Engineering Assessment Answer

TASK:

Introduction:
CNC based subtractive manufacturing has been in industry standard by which many of the parts and products have traditionally been realised. With respect to advanced manufacturing these processes typically require an appreciation for part digitisation, CAD/CAM and the intrinsic machinability, while materials are eroded to product the end product. By contrast additive manufacturing has emerged as a new manufacturing paradigm, with significant potential to supersede traditional manufacturing processes.
As with advanced subtractive manufacturing, part digitisation and CAD/CAM are critical elements in the machine interfacing, but with many subtle differences in what can be achieved at the design to manufacturing interface. More crucially, materials are added in a stepwise fashion, building a part from the ground up into the end product. Many believe additive manufacturing may someday replace subtractive manufacturing as part of the new industry 4.0, while other believe there is a place for both, and indeed each are complementary technologies to one another.
Assessment task:
You will be required to produce a state-of-the-art literature survey on the topic of Additive Manufacturing compared with Subtractive Manufacturing processes. In this report you will examine a very brief historical context of both technologies, before exploring the similarities and differences in each technology. Attention should be paid to the digital interface of each technology, drawing upon the elements discussed in both the lecture and practical sessions. Your report should include but not
be limited to discussions of
• The relevance of part digitisation and it implications on the design and evaluation process
• Limitations on what can and cannot be realised by design
• Manufacturing similarities and constraints
• Material processing capabilities
• Manufacturing complexity and ease of use
• Variations of technological platforms
• Performance based metrics – Resolution, quality, production time, multiplexing, etc

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