Modern Machine Shop

MAY 2018

Modern Machine Shop is focused on all aspects of metalworking technology - Providing the new product technologies; process solutions; supplier listings; business management; networking; and event information that companies need to be competitive.

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ADDITIVE INSIG MMS MAY 2018 40 mmsonline.com Understanding Industrial 3D Pr Realize your vision From quick prototypes to serial production, we got you covered . ExOne Binder Jetting ยจ Visit ExOne at IMTS in Chicago, IL from September 10 - 15, 2018 Booth 432308 (West Hall) likely will be required to ensure dimensional accuracy of the finished part. Few AM parts meet specifications "as built," and if nothing else, the surface of the part that was connected to the build plate will need to be finished. Most manufacturing companies already have machin- ing systems on hand, but registering parts and establishing datums for machining can be tricky, especially for complex, organically shaped parts made with AM. Accessing internal channels or cooling passages that need to be machined can also increase costs. The cost here is highly depen- dent on the material and the job as well as the fixturing needed to hold the part. Surface Treatments: Surface finishing also might be required to improve surface finish/ quality, reduce surface roughness, clean internal channels or remove partially melted particles on a part. When outsourced, these costs can easily run in the hundreds if not thousands of dollars. Inspection and Testing: Metrology, inspection and non-destructive testing using white/blue- light scanning, dye-penetrant testing, ultrasonic testing, computed tomography (CT) scanning and more will be needed after post processing and possibly at multiple points during post processing. Destructive testing of sample parts and analysis of witness coupons (for example, tensile bars), powder chemistry, material microstructure and more also may be needed to gather data to help with process qualification and ultimately part certification. Most companies will have a range of metrology and non-destructive testing methods on hand, but AM parts with internal channels, lattice structures and other internal enhancements may require CT scanning to ensure clear passageways, evaluation of internal geometries and more. A CT scanner will easily cost $1 million to buy, install and operate. AUTHO | Timothy Simps Professor of Engineering Design & Manufac Pennsylvania State Univer

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