Using 3D X-Ray Inspection for the Quality Control of 3D Printed Parts

3D printing is expanding its boundaries beyond visual non-functional prototyping, and adopting a technology that meets production requirements or real-world applications. As the demand for 3D printed parts is increasing, the industry is attempting to discover new methods to analyze and validate their products. Industrial CT scanning can be used to validate defects and internal geometry inside a part, without damaging it.

Industrial Computed Tomography Scan

Validation and qualification of prototypes and the first printed parts for various materials including plastic, mold components, or metal printed parts can be done using industrial computed tomography (CT) scan. Figure 1 & Video 1 show a plastic NSI logo with measurements.

CT scans are useful for manufacturing projects where high value printed parts need 100% validation during production. CT scans can quickly examine and reveal failed parts or errors caused due to stress or temperature change. The different types of analysis that can be performed on a scanned part include reverse engineering, external and internal geometry analysis, internal void analysis, part-to-CAD comparison, and much more.

A plastic NSI logo

Figure 1. A plastic NSI logo

Plastic NSI Logo with measurements

Video 1. A plastic NSI logo with measurements

Part-to-CAD Comparison

In the part-to-CAD comparison (Video 2) green indicates that the part is close to the CAD model, while blue is smaller than the CAD and red is bigger than the CAD. The part where the colors flatten out is beyond the parameters set for the analysis and is indicated by purple and pink.

Metal NSI Positive Logo CAD comparison

Video 2. Part-to-CAD comparison

Inclusion Analysis

In the inclusion analysis (the Positive Metal NSI Logo) and porosity analysis (plastic part) conducted, the software observes the gray value of the voxels in the volume, and evaluates whether the area is a porosity or higher density inclusion (Video 3 and 4).

The detected defects can be colorized to make the rough size and location visible. An option to produce a spreadsheet that indicates the size and location of the defects is also available; this can be used for accept/reject decisions. The accept/reject criteria can also be incorporated in the software when you run the analysis, and it will notify if it has been passed or not.

Porosity Analysis 3D printed plastic part

Video 3. Porosity analysis 3D printed plastic part

Metal Positive NSI Logo Defect detection

Video 4. Metal Positive NSI Logo Defect detection

Internal and External Geometry Analysis

For the internal and external geometry analysis the feature are fitted to the sample (i.e. such as sphere, cylinder, plane or line). These are then measured using the software.

Features that are not fitted to the part can also be created for certain dimensions from point to point on the stars (Figure 2) which were measured from lines created by intersecting two planes. Concentricity and parallelism can also be measured.

Download the Brochure for More Information

Features not fitted to the part can be created from point to point on the stars.

Figure 2. Features not fitted to the part can be created from point to point on the stars.

This information has been sourced, reviewed and adapted from materials provided by North Star Imaging, Inc.

For more information on this source, please visit North Star Imaging, Inc.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    North Star Imaging, Inc.. (2018, July 04). Using 3D X-Ray Inspection for the Quality Control of 3D Printed Parts. AZoM. Retrieved on June 17, 2021 from https://www.azom.com/article.aspx?ArticleID=13205.

  • MLA

    North Star Imaging, Inc.. "Using 3D X-Ray Inspection for the Quality Control of 3D Printed Parts". AZoM. 17 June 2021. <https://www.azom.com/article.aspx?ArticleID=13205>.

  • Chicago

    North Star Imaging, Inc.. "Using 3D X-Ray Inspection for the Quality Control of 3D Printed Parts". AZoM. https://www.azom.com/article.aspx?ArticleID=13205. (accessed June 17, 2021).

  • Harvard

    North Star Imaging, Inc.. 2018. Using 3D X-Ray Inspection for the Quality Control of 3D Printed Parts. AZoM, viewed 17 June 2021, https://www.azom.com/article.aspx?ArticleID=13205.

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Submit