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innova iovations CASTING


to suit diff erent types of applications. Micro units in table top styles for lab use up to full industrial grade fl oor models for in-plant or in-process use to portable measuring arms that can be used on the shop fl oor or out in the fi eld are all available today, usually from a manufacturer or a service or- ganization, for one-time contract use, with rent or lease-to-buy arrange- ments optional. Typical CT scanners offer a wide


range of measurement capabilities and features. Sizes start with small desktop models which meet the most stringent demands and mea- sure the smallest 3-D detail from 0.25µm. They can be equipped with different X-ray powers, from 160kV for nanometer resolution through 225 kV, 320 Watts to the highest


Metalcasters can use this technology to check for air bubbles and overall porosity.


power of 300 kV, 320 Watts. Larger scanners are available for


extremely fast CT data acquisition on workpieces up to 19.7 in. (500 mm) diameter and 23.6 in. (600 mm) in height, weighing up to 110 lbs. (50 kg). Typical functions performed on this type of system might include 3-D


analysis of a scanned turbine blade, au- tomatic pour porosity volume analysis on an aluminum casting and 3-D mea- surements with nominal-actual CAD comparisons on a machined aluminum cylinder head. The future of industrial scan- ning holds unlimited possibilities, especially when combined with 3-D printing or other additive manu- facturing methods. As improve- ments are made in technology and performance and costs continue to decrease, the industrial scanning industry is preparing for explosive growth in the next 5-10 years. 


T is article was written by Dean Solberg, co-founder, Exact Metrology (Cincin- nati). For more information, visit www.exactmetrology.com.


Computed Tomography (CT) is now commonly used in various industrial metrology settings, both in the lab and online or inline for product evaluation and packaging integrity assessment.


48 | METAL CASTING DESIGN & PURCHASING | Jan/Feb 2017


All images courtesy of Exact Metrology.


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