|Video of the Researcher|
Dr. Stephen C. Veldhuis
Creating materials that form oxides and nitrites when subjected to heavy loads and high temperatures that protect the metals much like callouses protect hands from wear and tear
|Type of researcher|
|Introduce yourself, your experience and your credentials||
My current research interests lie in the area of high performance manufacturing with a specific focus on precision and ultra precision machining. The main objective of my research is to enhance competitiveness of machining operations by improving productivity and quality while reducing cost. The approach taken involves a detailed framework for selecting and developing tooling followed by process optimization which aims to fully utilize the capabilities of the tool and machine.
|Describe your research||
Manufacturing matters and that’s our focus here in the MMRI. We’re very interested in manufacturing processes and driving improvements to enhance competitiveness of the local industry here in our area. We’re very focused on the process and the process for one would be machining for us.
We’re interested in subtractive manufacturing that would take best-in-class materials with very unique mechanical, electrical and chemical properties and be able to machine those to get type tolerance high dimensional accuracy parts with very good surface finish and surface quality. Those kind of components go into the parts that you’re used to seeing an automotive, aerospace, consumer goods, energy products, biomedical and all of those really require high-performance components and we can achieve that through machining.
When we look at the machining process it triggers a lot of very high temperature and heavy load interactions. We take the surfaces and we engineer them to be very specific to the materials involved in the process. We’re working to try to develop very unique surface responses in those extreme environments so that the tool actually protects itself while it’s in the process.
So those oxides and nitrites form and what we need to be able to do is supply the right alloys into the region and also provide the right conditions to form those. If we can successfully do that we can make a system that’s a very protective and ultimately drive that to get higher competitive processes.
When we think about how these components come together these components ultimately produce the innovative products that you’re working with every day. Automotive, aerospace, consumer goods, biomedical devices, and energy products all of those are driven by high performance materials that require very advanced manufacturing and that’s our focus here.
Looking at how we can take the best processes and result in the best products.
|Explain its significance||
Manufacturing matters. We’re really focused on the manufacturing process and we’re trying to drive improvements in that process through understanding of how the process performs. We do that by understanding through simulation and modeling, we try to implement sensors on our equipment or industry scale manufacturing machines, we draw the data from those machines in order to understand how the process is performing and we use that data to try to drive improvements.
Our focus here is on the tribological interaction of those materials. So tribology is a study of friction and wear and that’s one of the main limiters to how a tool performs in a process. If we can drive an improvement we can actually achieve a real competitive advantage so the type of improvements that we’re really focused on are self protective behaviors of surfaces.
So it’s very similar to how calluses form on your hands when you’re working in the garden. As you work with tools your hands begin to form calluses that serve to protect your hands or further work. If we can achieve the same kind of thing in an inert object like a tool we have a really good competitive advantage. So our focus is on trying to understand how those surfaces interact.
We use that information to try to drive a very similar behavior. So ultimately as the tool is interacting with the workpiece under heavy load and high temperature, we’re forming oxides and nitrites that can be very protective. If we get the right formations to take place we can actually protect the tool under very aggressive conditions and we can drive performance while still achieving a long tool life.
That combination really results in a competitive process and that’s what we’re trying to deliver to our industry partners. So through close collaboration with them we can duplicate their processes here in our shop extract meaningful data from their processes and use that to drive process improvements.
High-performance processes ultimately make them more competitive which is what our real focus is on.
McMaster University, Main Street West, Hamilton, ON, Canada
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