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3D-Quality Inspection of Plastic Parts

The Wirthwein AG, a well-known German manufacturer of plastic components for the automotive, railway, electronics and home appliances industries as well as for medical science products, employs a Breuckmann scanning system in order to process the recorded 3D data of their components for evaluations with respect to geometry, shape and position tolerances and CAD comparisons.

 

 

Objective and Measuring Object

Application areas at Wirthwein range from first sample inspection and process optimisation to random inline production quality inspection. Task of this particular project is to generate 3D measurement data of a component for a car door (200 x 140 x 30 mm) to be exported into a special 3D inspection software.

 

The object surface is semi-transparent, and in particular to capture the important „clips“ components at very high accuracy is a major requirement. The object exhibits a complex geometry with shading areas, undercuts and numerous edges which pose a particular

difficulty to conventional digitisation systems.

 

Measuring System and Setup

Given the demanding requirements with regard to resolution, feature accuracy and flexibility combined with the demand to simultaneously scan areas which are difficult to access from three different triangulation angles, Wirthwein decided in favour of Breuckmann’s top-end measuring system stereoSCAN 3D-HE.

 

To achieve a virtually automated digitisation process, the scanner is combined with a turntable (available as optional accessory).

 

Measuring Object

Component of a car door

Material: Plastic

Dimensions: 200 x 140 x 30 mm

 

Measuring Principle

Topometry: imaging measuring principle based on structured light projection; combination of GrayCode- and Phaseshift technology

 

Technical Specification

Measuring system: stereoSCAN 3D-HE with turnTable-20

Measuring field: 175 mm

Feature accuracy: ±10 μm

Camera resolution: 2 x 5 MPix

Light source: 100 W halogen lamp

Working distance: 880 mm

Sensor weight: 6 kg

Measuring time: <1 sec/scan

Certification: VDI/VDE Guideline 2634

Turntable: turn angle: 360°, load capacity: max. 20 kg

Digitisation software: OPTOCAT (Breuckmann GmbH)

Inspection software: Polyworks Inspector (InnovMetric Software Inc., Kanada)

 

 

 

 

Pictures

Measuring system: stereoSCAN
Measuring object: Plastic part
Precise, fast, high-resolution...
... 3D data capturing.