OCT

Product features OCT

Seam tracking

Correction of the processes without delay

Positioning

Analysis and visualization

Direct Check

Real-time verification of the weld seam

Autocorrect

Effective seam guidance through correction of the lens

OCT – OPTICAL COHERENCE TOMOGRAPHY FOR LASER WELDING

Seam tracking – process observation – seam monitoring

The OCT system from Lessmüller Lasertechnik offers completely new possibilities for quality assurance of your welding processes – in real time.

Coaxially coupled into the processing beam or as a stand-alone variant, the OCT performs a highly accurate height profile measurement in the area of the TCP (Tool Center Point). During the active welding process, the component surface is scanned with µm precision at around 70,000 measuring points per second. An image includes areas of the weld butt joint, the molten pool and the cooled seam.

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In addition, OCT allows the processing laser head to track the weld joint or seam in a self-controlled manner, independent of the current direction of laser head movement and without prior calibration or predetermined trajectory information.

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This allows precise and non-contact seam tracking before the welding process and contour control of the finished seam after the welding process. No other method allows such an economical and highly accurate measurement of the weld penetration depth (keyhole depth) possible during the process.

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This opens up the possibility of performing seam tracking (pre-process), process monitoring (in-process) and seam control (post-process) in laser welding (and also soldering) with a single system. Extensive software packages exist for all three application areas, which offer automated evaluation of the measurement data. The flexible adaptation of the evaluation algorithms to your specific tasks is one of our greatest strengths.

Each OCT system is individually configured and parameterized according to the requirements of your processes. All relevant measurement and evaluation data are stored for complete traceability and are available to the user without restriction. Our OCT system is compatible with all common welding optics – scanner optics as well as fixed optics – and supports all common fieldbuses.

Measurement with OCT is direction-independent and can be used omnidirectionally. In addition, the OCT is unaffected by interfering influences such as smoke, stray light or irregularities on the surface, such as scratches.

Advantages with OCT

Precise edge detection and seam tracking in any direction and at any welding angle
Online defect detection and auto-correction to reduce scrap production, inspection costs and rework rate
Reliable automated detection of defects in the finished weld seam
Measurement of the weld penetration depth (keyhole depth) during the welding process
Measurement result unaffected by process lights and extraneous light
Robust and proven detection and evaluation algorithms
Easy adaptation to common laser welding optics with camera connection
Robust industrial design: dust-proof construction with robot-towable cable and interfaces
Visualization of all relevant measurement and evaluation data for traceability
High configurability

Optimum welding quality

Whether integrated into a processing laser or used as a stand-alone, by using the OCT system from Lessmüller Lasertechnik you are making the choice for the most powerful quality assurance for welding processes on the market.

The possibility of using the system for all types of process monitoring, i.e. as a pre-, in-, or post-process, guarantees you the technically best possible welding quality in your manufacturing production according to today’s standards.

Reduction of misproductions

The primary task of OCT sensor technology is to avoid incorrect positioning of the processing optics or the laser beam. This can be done before welding by detecting the actual weld seam geometry and making preventive corrections, if necessary, or during welding by continuous, automated readjustment (seam tracking).

Furthermore, the weld penetration depth can be determined and monitored during welding. If defects occur, the ongoing process can be interrupted and defective parts can be prevented from being processed further.

Finally, the OCT from Lessmüller Lasertechnik can even measure the topography of the weld seam and check it for defects, both during and after the welding process.

Better planning

Since OCT works independently of extraneous or interfering light, detectability and measurability can already be estimated in the planning phase of impact geometries. There is no need to create complex illumination simulations as for camera systems.

By using OCT for keyhole measurement, it is possible to determine whether the welding process is safe, constant and reliable in the essence during the initial welding tests, even before the feasibility studies. Thus, OCT contributes to the improvement and optimization of welding processes.

For the measurement of the POST process, offline tests can also be made parallel to the still ongoing process development.

We make it fit

From the needs analysis of your requirements and the welding tests of your task in our in-house test laboratory – we are happy to advise you. From project planning to implementation and integration of the modules into your plant as well as user training of your employees on site – with us you get everything from one source.

We are your contact partner both before and after successful completion of the project. Our customers know this and appreciate us for it.

High customer satisfaction

All large and well-known OEM manufacturers have been using Lessmüller sensor technology for years. In the field of electromobility, battery manufacturers from China and Korea are among our customers.

Overall, we work with many system integrators: Bergmann & Steffen, Erlas, Felsomat, Thyssen Krupp Engineering, Manz, Comau, Evobeam, Aumann and others.

Ask us for detailed information.

APPLICATIONS

Here our OCT solutions have already proven themselves

OCT has established itself in practically all manufacturing productions as an optimal and comprehensive tool for quality assurance of industrial laser welding processes. The technology is trend-setting and is already considered the standard solution par excellence in many industries.

If you would like to learn more about the technical basics of OCT, we recommend the guidelines of the Association of German Engineers (VDI).

Our OCT solutions have already proven themselves here …

Product Advise

Florian Günther

+49 (0)89 – 360 90 48 – 11
sales[Ω]lessmueller.de

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Product solutions

Downloads

Lessmüller OCT

OCT for scanner and fixed optics

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WHERE YOU FIND US

GERMANY

Lessmüller Lasertechnik GmbH
Gollierstraße 12
D-80339 München
Tel.: +49 (0)89 – 360 90 48 – 0
Fax: +49 (0)89 – 360 90 48 -29

Email: info[Ω]lessmueller.de
Web: www.lessmueller.de
Location: Google Maps

ITALY

(Representation for OCT only)

OPTOPRIM Italia s.r.l.

Via Carlo Rota, 37
20900 Monza
MB – Italy

Phone.: (+39) 039 834977
Fax: (+39) 039 2845269

E-Mail: info[Ω]optoprim.it
Web: www.optoprim.it