Femtosecond Laser Metal Micromachining: From Drawing to Trial

Femtosecond laser metal micromachining is relevant when a component needs small holes, narrow slots or local surface structures that are difficult to produce with conventional tooling. A successful project begins with the function of the feature: what must the finished part do, and how will that be verified?

Where ultrashort pulses fit

Short laser pulses concentrate energy into brief interactions with the workpiece. With a suitable process, this can limit unwanted thermal effects around a feature. Fraunhofer ILT identifies precision drilling, cutting and surface structuring as ultrashort pulse applications. Actual edge quality and productivity depend on the material and process settings; a femtosecond specification alone is not a guarantee.

Define the feature in three dimensions

A drawing that only gives the top-view diameter of a hole leaves important questions unanswered. Include the material thickness, allowed taper, entrance and exit conditions, edge radius and the reference surface used for measurement. For a slot, distinguish the opening width from the maximum permitted width anywhere through the part.

For surface textures, specify the purpose and a measurable success criterion. A texture intended to change friction needs a different evaluation from a decorative pattern or a structure intended to influence wetting. Provide an untreated reference sample alongside the trial parts.

What to send for a metal processing enquiry

• Alloy designation, material condition, thickness and any plating or coating.
• A dimensioned drawing with tolerances and critical features highlighted.
• Representative sample material, including the normal production surface finish.
• Prototype quantity, expected batch size and a target cycle time if known.
• Limits for burrs, recast material, roughness, distortion and permitted post-processing.

Compare finished parts, not nominal cutting speed

For a meaningful jobshop comparison, include fixture preparation, alignment, processing, cleaning and inspection. Agree whether quoted time refers to one feature, one part or a complete batch. A small improvement in scan time may matter less than reliable positioning or a simpler inspection step.

The trial report should identify which requirements were met, which remain open and what changes would be needed for repeat production. Keep a representative processed sample as a reference. Do not assume that a successful result on one thickness transfers directly to a thicker component or a different alloy.

Can laser processing replace mechanical machining?

Sometimes the most useful approach combines them. Conventional machining can produce the main component, followed by laser processing of the local features. Ask for a comparison based on accepted part quality, batch size and total cost, rather than choosing the process from the smallest advertised feature size.

Discuss your application with DIY-Optics

DIY-Optics GmbH develops the PulseBrick ultrashort pulse laser platform in Switzerland and provides optical and laser engineering. For a feasibility discussion, sample-processing enquiry or potential jobshop project, send us your material-processing requirements. We will confirm the available process route, scope and timing before a trial is agreed.

Preparing an enquiry? Use our laser processing trial checklist, or explore laser and optical engineering services.