3D-Qualitätskontrolle einer Autotür. 3D-Farbvergleich mit Abweichungsbeschriftungen.

3D quality control


Ensuring product quality effectively

A component that does not function as planned after installation? A machine that breaks down because of a worn element? A defective product sample that is rejected by the customer?

In all these cases, professional 3D quality control from sigma3D is the solution to analyze components and products down to the last detail in the shortest possible time. Find and eliminate quality defects even before production or installation - and save time and costs by minimizing assembly times and test runs.

Whether it's a tiny gear wheel, an assembled car door or a complete yacht - our team will record objects of any size for you using the latest 3D measuring technology. Smaller components and products can be sent directly to us, where we have our own measuring room, while larger ones can be scanned on site.

Our measuring team of experienced engineers records the entire object for your 3D quality control with a measuring accuracy of 0.02 to 0.2 mm. The scan created completely represents your component as a digital polygonal model: Virtually, you can change the alignment at any time, compare data and gain new insights through further analysis.

Depending on your requirements, we use different methods for our 3D quality control in order to bring the captured actual data together with your target data. On this basis, we create individual analyses and evaluations for you, such as target-actual comparisons, initial sample inspection reports or evaluations of specific inspection characteristics. And: If you are faced with a special metrological problem, we are guaranteed to find a solution with our many years of experience.

We will be happy to help you with any questions you may have about 3D quality control - just get in touch with us!

Your advantages at a glance

  • Professional 3D quality control according to ISO standard
  • State-of-the-art 3D measuring technology on site or in our own measuring room
  • Effective evaluation strategies based on many years of experience
  • Individual solutions for your metrological problems
  • Deviation analysis and inspection characteristics plan according to ISO 1101 GPS as well as factory calibration according to ISO 9001

Deviation analysis: The fastest method of 3D quality control

Deviation analysis is one of the fastest methods of 3D quality control: Here we align our 3D scan according to your specifications and compare any dimensions of the real product and the CAD reference object. A visual false color comparison shows you the deviations in dimension and shape from the theoretical data set. The evaluation is carried out according to the DIN standard EN ISO 1101 Geometric Product Specification (GPS). For example:

  • Nominal/actual comparison of sections, form elements and discrete points.
  • RPS alignment
  • Initial sample inspection report (EMPB)
  • Feature verification by shape and position from drawing
  • Virtual assembly of components
  • Evaluation of machining allowances and wall thicknesses
  • Statistical process control and variance analysis

Target/actual comparison: Detect and visualize deviations

An area-based target/actual comparison is the visual representation of 3D deviations: These represent the distance between a measuring point and its associated CAD surface.

For a simple and fast 3D quality control, we display all 3D deviations in a color map for you. We can customize this representation individually, for example by color selection or defined surface tolerance zones with in-order or out-of-order markings. For a target/actual comparison, we can use different analysis methods depending on the shape and type of your measured object:

Deviations at defined nominal points: Defined nominal points on the CAD model allow an exact and repeatable deviation analysis. The results are interpretable equivalent to the measured values of a tactile coordinate measuring machine - whereby the evaluation time is independent of the number of nominal points.

Deviations at edges: We evaluate trimmed or flanged edges via an edge point and a reference point at a defined distance from the edge. Thus, the edge and also the springback of the component are evaluated.

Deviations of defined sections: Se ctions are used for a variety of evaluations and enable the functions of calipers and profile gauges as well as gap and flush measurements on the 3D model. In this way, various measuring tools can be transferred from the workshop environment to the 3D world for your 3D quality control.

3D quality control: Examples of analyses and evaluations

Initial sample inspection report (EMPB): Best conditions for your series production

Before the start of series production of components or products, it is necessary to create an initial sample inspection report (EMPB) of an initial sample series. Within the scope of our 3D quality control, we determine single to several hundred relevant dimensions of your initial samples for your EMPB, depending on your individual requirements.

You will receive the final EMPB with meaningful data on the actual values compared to the target values from us, usually in the form of a drawing. You can immediately identify possible deviations within the series and draw direct conclusions as to whether they occur in the production process or on the production machine. As soon as the initial sample inspection report for your component or product meets the requirements of 3D quality control, you can use it as proof for partners and customers.

Evaluation of form and position: Geometric product specification

Shape and position tolerances for assemblies is a means of defining the requirements of the design and drawing in relation to the actual function and relationship. In the course of our 3D quality control we evaluate all requirements according to form and position tolerances.

This is done using geometric tolerance zones in which a measured value should lie. We make the interpretation of the evaluated values clear and simple for you: The result is i.O ("in order") or n.i.O ("not in order"). Our 3D quality control is carried out here in accordance with DIN EN ISO 1101 Geometric Product Specification (GPS).

RPS alignment: Alignment via reference points

The basic prerequisite of any analysis within the scope of our 3D quality control is alignment. An alignment is the operation by which the digitized 3D coordinates of a point cloud are transferred into the same initial coordinate system - for example a CAD nominal data set. In addition to alignment via a reference point system (RPS alignment), we also use "surface-best-fit" and alignment via references.


Individual measurement programs for your inspection characteristics plan (PMP)

Within the scope of 3D quality control, we create measurement programs for you according to your inspection characteristics plan (PMP). Here we bring together engineering knowledge and enormous application competence for you.

Thanks to external programming by us with the Polyworks Inspector measuring program, you benefit from our experience in developing effective evaluation strategies. The evaluation is carried out according to the DIN standard DIN EN ISO 1101 GPS (Geometric Product Specification).

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