Timothy W. Simpson Paul Morrow Professor of Engineering Design & Manufacturing

Timothy W. Simpson Paul Morrow Professor of Engineering Design & Manufacturing

Dr. Timothy W. Simpson is the Paul Morrow Professor of Engineering Design & Manufacturing at Penn State University, as well as the co-director of the Center for Innovative Materials Processing through Direct Digital Deposition (CIMP-3D). He is a regular contributor to Additive Manufacturing, and writes the monthly Additive Insights column for Modern Machine Shop.

Basics

Additive Manufacturing with Sheet Lamination

No longer limited to paper, Sheet Lamination bonds sheets of material together to form an object. Companies are now expanding to different materials for sheet lamination, exploring the growing possibilities of a process that started with gluing and stacking hundreds of colored sheets of paper together.

Materials

Material Jetting - It's Like Printing, Just in 3D!

Recent advances in materials processing capabilities have renewed interest in material jetting, the additive process that allows 3D objects to be built by placing different combinations of material drop-by-drop.

Metal AM

Material Extrusion: Now with Metal

Challenging our thinking about materials in metal additive manufacturing and the possibilities with material extrusion technology.

Materials

Additive Manufacturing via Material Extrusion

Material extrusion was the second process to be successfully commercialized. After three decades of material advancements and a diverse array of start-ups and applications, the use cases for this technology are still going strong.

Production

Additive Manufacturing — More Than Metal: How Vat Photopolymerization Started It All

Vat photopolymerization was the first AM process to be successfully commercialized. Three decades later, this technology has shown how AM is capable of scaling to volume production and making custom products on demand.

Additive Manufacturing and Metal Casting

How is additive manufacturing disrupting metal casting? A hybrid approach to consider.

Hybrid Manufacturing

Additive Manufacturing for Hard Tooling

Hybrid manufacturing is enabling tooling to be made with additive processes.

Postprocessing

Combining Additive and Subtractive Processes for Hybrid Manufacturing

At this point, we are still learning how to combine the two to optimize hybrid manufacturing.

Metal AM

Additive Manufacturing with Wire

This system has the benefits of cheaper cost and easier handling. But there can be some drawbacks as well.

Metal AM

Three Cool Uses for Directed Energy Deposition

Most machining professionals don’t like to admit that they ever make mistakes, but every now and then wouldn’t it be nice to have an “eraser” to go back and repair a gouge or fix a nicked edge? Or maybe you took off a bit too much material on that last machining pass and you’d like to add it back? Well, directed energy deposition (DED) enables you to do that and more.

Basics

What Is Directed Energy Deposition?

Analyzing directed energy deposition and powder-bed fusion provides a thorough understanding of the extra machining necessary for a “near-net shape” versus a “net shape” manufacturing process.

AM Technology

Additive Manufacturing for Large Parts

Powder-bed fusion is driving the hype for additive manufacturing right now, but it may not be the best answer. Directed energy deposition is a strong contender.