QUALITY & VERIFICATION
Verification of a micro-perforated component is not limited to a nominal aperture or an outside dimension. Aperture geometry, surface condition, component form and system interface are considered together against the technical requirement.
The control scope is defined against the technical requirement. The production result is verified on the component.
CONTROL AREAS
The component is evaluated as a complete technical part rather than through an isolated hole diameter.
The target aperture is considered together with the geometry produced on the working and back faces. For tapered micro-holes, the two faces are not treated as interchangeable dimensions.
Burr condition and laser-process residue form part of production control and can influence the required post-processing approach.
Micro-perforation is not evaluated independently from the complete part. Thickness, overall geometry and component form remain relevant after laser processing.
Centre, perimeter, mounting and indexing features are considered in relation to the existing component or equipment interface.
TYPICAL PRODUCTION & VERIFICATION FLOW
BEFORE THE FULL COMPONENT
Where required, test perforations are produced before the complete component is processed. Working- and back-face aperture geometry and surface condition provide direct feedback before full-part production.
DEFINE
Establish the geometry and technical features relevant to the application.
INSPECT
Inspect the working face, back face and resulting surface condition.
REFINE
Use the inspected result to refine the approach before processing the full component.
Process parameters guide production; verification is based on the measurable and observable result achieved on the component.
GEOMETRY & MEASUREMENT
The schematic identifies features that can enter the measurement or geometric-control scope according to the technical requirement. It is a terminology diagram, not a measured component record.
OPTICAL CONTROL
A microscope image taken from production is used to evaluate aperture geometry and surface condition.
Where relevant to the project, open-area percentage can also be derived geometrically from the defined perforation pattern.
CONTROL METHODS
The control method, control scope and acceptance criteria are defined against the technical reference established for the project. That reference may be a drawing, defined geometry or, where appropriate, verified information obtained from an existing component.
| Feature | Control method | Control stage | Control output |
|---|---|---|---|
| ØA · Inlet / working-face aperture | Sampled measurement using an optical microscope with self-calibration capability. | Test perforation and final control | Measurement result |
| ØB · Outlet / back-face aperture | Sampled measurement using an optical microscope with self-calibration capability. | Test perforation and final control | Measurement result |
| ØA–ØB face geometry / taper | Working- and back-face aperture geometry are reviewed together. | Test perforation and final verification | Geometric comparison |
| Hole geometry | Shape and aperture are reviewed using an optical microscope. | Test perforation and final control | Optical inspection |
| Hole pattern / pitch | Optical and geometric control is performed according to the technical requirement. | Production and final control where required | Geometric control |
| Burr / surface condition | Surface condition is reviewed using an optical microscope and visual inspection. | After cleaning and during final control | Optical / visual inspection |
| Component form | Component geometry is compared against the drawing and application requirement. | After form stabilisation / correction | Geometric conformity check |
| System interface / critical dimensions | Critical features are compared against the drawing or existing-component reference. | Final control | Comparison against technical reference |
Optical dimensional verification is performed using an optical microscope with self-calibration capability. Before each part or job, the production machine is recalibrated to keep the requested hole dimensions under control during production. Verification results can be shared as technical documentation according to project requirements.
VERIFICATION PRINCIPLES
The applicable control scope and acceptance criteria are defined against the technical reference established for the project.
Working- and back-face geometry, surface condition, component form and other project-critical features can also enter the control scope.
Equipment compatibility can depend on centre, perimeter, mounting and indexing geometry in addition to overall diameter.
The perforated area, hole count and distribution across the component influence the control scope. As the hole count or perforated area increases, the number of controlled regions and measurement points is increased. Aperture geometry and surface condition are reviewed across different regions to evaluate the production result.
TECHNICAL CONTACT
A machine or system reference or basic application information is enough to start. An existing component or drawing can support the review where available; we’ll clarify the applicable control scope together.
Useful starting information
