Profile, Contour, Surface

Konventionella inspektionssystem som mätmikroskop är inte lämpliga för automatiserade inlinelösningar eftersom inspektionsprocessen tar lång tid och dessa mikroskop är mycket dyra. Därför används 3D-sensorer från Micro-Epsilon för att möjliggöra helautomatisk inline-inspektion av substrat.

3D-snapshotsensorn, surfaceCONTROL 3D 3510, med hög precision mäter direkt i produktionslinjen på underlagets matta yta. Arbetsavståndet är 120 till 140 mm. De registrerade mätvärdena beräknas i sensorn och matas ut till en extern PC via det integrerade gränssnittet Gigabit Ethernet. Ytterligare bearbetning, utvärdering och loggning av 3D-data är möjlig med hjälp av den kraftfulla programvaran 3DInspect.

Qsigma designade Spring Measurement System (SMS) för exakt 3D-mätning av spiralfjädrar och andra komponenter. Systemet används bland annat vid utveckling av prototyper och besiktning av seriedelar. SMS identifierar automatiskt fjädern, utvärderar trådkonturen och bestämmer tråddiametern, även om den är utsatt för kraftiga fluktuationer.

Sensorn scanCONTROL 2950 har ett stort mätfält i både Z- och X-led. Detta möjliggör extremt snabb avsökning av fjädrar upp till en höjd om 70 cm och radiellt upp till 30 cm. Det stora räckvidden i kombination med hög punktdensitet möjliggör exakt utvärdering av tråddiametern.

Micro-Epsilon scanCONTROL laserprofilskannrar är idealiska för maskinintegrering och automatisering tack vare höga noggrannhet, kompakt design och universella applikationsalternativ. Förutom en kraftfull laserprofilskanner för detektering av komponentgeometrin används också motsvarande utvärderingsprogram. Företaget BCT GmbH från Dortmund har utvecklat programvarulösningen OpenSCAN för detta ändamål, vilket möjliggör maskinintegrerad digitalisering av arbetsstycken i kombination med 3D-skannrar från Micro-Epsilon. Komponenter detekteras direkt i bearbetningsmaskinen vad gäller position och form.

Kitchen worktops are now made from a variety of materials, e.g. natural or artificial stone, solid wood and laminate (e.g. HPL). All these materials offer benefits and have special characteristics. However, a defect-free surface finish and perfect edges are critical production factors. The example above is a so-called laminate worktop with a stone decor. As the cutting edge of this top is rough and unclear, it is covered with sidebars. Foreign bodies, uneven distribution of the adhesive or unevenness when closing may produce open joints between the top material and the sidebars. The scanCONTROL 2910-25 laser profile scanner is used to inspect if any open joints are present.

After injection of the sealing compound in the covering lid, curing takes place in the tunnel furnace. Here, fault points and faulty thicknesses of compound must be acquired and faulty lids must be sorted out in the production process. A laser-based optical displacement measurement system samples the compound surface of the rotating lid for a quality inspection. The monitoring of the thickness contour within the permissible tolerance limits and the sorting of the faulty lids occurs with the aid of the PLC that is

employed.

The scanCONTROL laser scanner is used for part inspection of various hypoid-tooth components and a digital model of the tooth structure of the component is generated by the measurement system. In this way, the 3D point cloud can be evaluated afterwards according to customer requirements. Previously, this type of inspection was done with manual removal of the part.

A special measuring system has been developed for the quality control of display glass. The glass pane is placed on a measuring table by a robot. A measuring arm with several confocal sensors traverses the glass pane there. If any defects are found, the pane is marked as NOK and rejected. The scanCONTROL laser scanner simultaneously circumnavigates the edges and checks these for defects and dimensions. After the check has been completed successfully, the pane is lifted back into the production process and the next measurement is started.

In the production and processing ne of metal strips, numerous measurement variables need to be monitored, e.g. straightness, cambering and deflection. The inspection of these quantities is carried out using three optical micrometers. The two outer laser micrometers form a straight line. The middle one measures the deviation and therefore the deflection to this straight line. The position of the sheet edge in the laser beam is not important here as long as the edge is within the beam path of all the three micrometers.

To meet safety regulations, the inspection of the internal parts of pipelines is mandatory, as any defects can lead to cracks, which could result in complete pipe failure or, in the worst case, in personal injury. The critical factor is the weld seam. DEKRA developed a fully automatic vehicle that solves this task by using a combination of visual inspection and geometrical measurements performed by a scanCONTROL laser scanner from Micro-Epsilon.

A special measuring system has been developed for the quality control of flat glass. The glass pane is placed on a measuring table by a robot. A measuring arm with several confocal sensors traverses the glass pane there. If any defects are found, the pane is marked as NOK and rejected. The scanCONTROL laser scanner simultaneously circumnavigates the edges and checks these for defects and dimensions. After the check has been completed successfully, the pane is lifted back into the production process and the next measurement is started.

With investigations using realistic models of flowing waters, the river bed must be sampled as accurately as possible and without physical contact. To do this, the laser-based optical displacement measurement system, optoNCDT, is used which

features high accuracy with a large measuring range and is largely independent of the ground conditions. It is mounted together with the signal conditioning electronic unit on a measurement carriage movable in the X direction which is suspended from a traversing beam movable in the Y direction. The distance to the water surface is acquired simultaneously with a parallel-mounted ultrasonic displacement system.

As rotary pistons for pumps must have very precise surface geometries, the pistons have to undergo 3D shape measurement. The scanCONTROL laser scanner is moved vertically by a linear axis in a special measuring machine. In doing so, the piston rotates in the measuring range of the scanner. A resolution of 3µm is achieved using this.

Tram or train rails are subject to constant wear either due to corrosion or due to friction during use. Rails are checked for wear completely automatically using a system developed by Micro-Epsilon. A test car records the surface profile of the rail during the journey. The data obtained is compared with standard values and if a section is recognized as worn down, the system stores the track section for later maintenance. The profiles are measured using several line scanners of the type scanCONTROL 2800.

Measuring complex part geometries is a task for the scanCONTROL laser scanner. Laser scanners are used in the precision machines of EHR in order to perform a component inspection at high resolution and without contact. The special feature is that using a scanner, not only is an inspection possible from the outside but also from the inside.

scanCONTROL 2600 -sensorerna som används utgör en ridå ovanför eller under detektorn beroende på klättringsriktningen. På grund av detektorstorleken krävs ett motsvarande stort mätområde på 100 mm i X- och Z -riktningarna. Sensorerna placeras direkt på robotarmen nära detektorn. Detta möjliggörs av det kompakta sensorhuset och den låga vikten på bara 380 gram. Dessutom är laserprofilskannrarna från Micro-Epsilon resistenta mot de förändrade miljöförhållanden som klätterroboten utsätts för vid utomhusbruk.

Mätsystemet är nästan okänsligt för fallande damm och smuts vid avlägsnande av murverk samt vatten, fukt, vibrationer och stötar. En manuell laseravstängning ger ytterligare säkerhet vid hantering av roboten. Hinder mäts från en bredd av 156 µm och en höjd av 12 µm. Fasadernas olika material och ytegenskaper påverkar inte mätresultatet.

The tree trunk cut into planks in saw mills still shows the wane of the original tree on the edges. In order to achieve an optimum cutting width and thus a maximum yield here, laser triangulation sensors are installed every 30 to 50 cm which measure the transverse section of the plank in the flow path. The maximum width of the plank is calculated using special software.

Vid produktion av solceller sågas kiselstänger i tunna skivor. Vid framställningen av stängerna kan emellertid geometriska avvikelser, som negativt påverkar arrangemanget av cellerna i modulen, förekomma. Därför inspekteras stången för att hitta avvikelser före sågningen. Fyra linjeskanners, scanCONTROL, används i detta speciellt framtagna mätsystem för uppgiften. Skannrarna rör sig längs stången och utför en fullständigt objektiv bedömning möjlig. Även en böjning av stången detekteras.

För att undvika korrosion är ett kontinuerligt och felfritt korrosionsskydd en kritisk faktor i målningsprocessen. Eftersom den applicerade färgens tjocklek vid grader endast kan utföras med stor begränsning är det en avgörande faktor att graderna upptäcks tidigt i produktionsprocessen, innan korrosionsskydd och andra färgskikt appliceras.Till skillnad från fasta lösningar, som bara möjliggör stickprovskontroller, erbjuder Micro-Epsilon ScanCONTROL 2910-10/BL ett Plug & Play-system som ger den nödvändiga precisionen. Med en upplösning på ca. 8 μm längs laserlinjen kan graderna detekteras på ett säkert sätt även vid in-line-mätningar.

Border strips are automatically adhered to glass by robots in vehicle production. This automatic process must be monitored as the application of uniform adhesive beading by the robot is not certain. The adhesive beading is checked immediately after the application by the same robot using a scanCONTROL 2810 for height, width and position.

In order to permanently protect weld seams against the penetration of moisture, BMW AG’s Leipzig factory seals the weld seam on the roof rail. A robot automatically applies sealant at the position where the side frame  is joined to the roof panel. A laser sensor from Micro-Epsilon, which prepositions the robot using distance measurement, is used so that the robot knows exactly where each weld seam is located.

It is important during the gluing in of glass panes in automobile production that the adhesive beading shows a constant track. Therefore a robot arm tracks the adhesive beading track exactly with a scanCONTROL laser scanner. In doing so, the robot centres itself on the adhesive beading automatically due to the measured data. In doing so, the scanner measures the surface profile of the adhesive beading. The supplied software automatically detects whether the beading is too narrow, too wide or too flat.

Vid sökandet efter nya material för kontaktlinser så måste materialet genomgå åtskilliga tester. Linsen placeras i ett litet glashus fyllt med saltlösning och med den mycket sofistikerade ThruBeam-modellen ODC2600-40 kontrolleras dimensionella förändringar under uppvärmning och sträckning av linsen. En stor fördel är att mätningen kan ske genom både glashus och saltlösning.

Using connectors and sockets, electrical circuits can be alternately opened and closed. The connector pins must be correctly oriented in order to prevent the pins from bending during connection. As this cannot always be guaranteed by the mounting process, it is important to inspect the coplanarity and the orientation of the connector pins to one another. In many cases, mechanical sensing devices carry out this task. However, this procedure has its disadvantages. First, the sensing device itself applies a certain force onto the pins, and second, the mechanical parts are subject to wear, which reduces the measurement accuracy and reliability. Non-contact scanCONTROL profile sensors measure are wear-free and are applied in a variety of pin inspection tasks.

The exterior appearance is an important factor for many surfaces. The reflectCONTROL inspection system is suitable for automatic defect inspection of reflecting surfaces. This system measures the quality of the surface without contact using light reflections and classifies the defects found. The system is particularly suitable for painted surfaces or smooth plastic. Different versions make possible adequate usage for automobile body shells or smaller elements.

Sliding bearings are used in combustion engines for the crankshaft and camshaft. The bearing shells are often composed of three layers whereby the inner layer is only metallised or sputtered. If there are residues on the bearing shell, the inner layer has too little purchase and flakes off. The system from Micro-Epsilon checks all bearing shells at the end of the production for a faultless condition of the surface. A BV camera records an image of each shell which is evaluated afterwards completely automatically. If necessary, the system also takes over the selection afterwards depending on the measurement result.

Accurate dimensions and shape of the prefabricated cans and can-lids is of prime importance, in order to ensure that the lids and the cans match properly and form a permanent airtight seal after the filling and sterilization process. This in order to avoid costly batch sealing failures in the canning industry. A special non-contact automated measurement testing machine was developed to control the dimensional integrity of the cans and the matching lids.

Even if gaskets are just very small components in plant and machinery, they are still critical in terms of their function and operational reliability. However, mechanical engineering companies normally purchase these components rather than produce them in-house. Reliable quality control at goods inwards is therefore essential.

Fraunhofer EMI forskar om effekten av laserstrålar på olika ytor. För detta ändamål bestrålas olika prover med en högeffektlaser. Samtidigt mäter två scanCONTROL laserskannrar från Micro-Epsilon den exakta förändringen i ytgeometrin. Baserat på mätresultaten kan nya insikter fås om hur olika processparametrar t.ex. laserkraft, laserpunktstorlek och luftflöden påverkar interaktionsprocessen mellan laser och materia.

Profile measurement generally describes the measurement of the object contour, flat or as a track. Basically, it is possible that either the sensor traverses across the object or the object moves through the measuring range of the sensor. It is important therefore that the object is located in the measuring range of the sensor during the complete measurement. The scanCONTROL laser scanner is ideal for a wide track. It measures a profile across maximum 140 mm width. In this way, either a wide track or the complete measuring object can be measured. Non-contact and inductive sensors are suitable for a narrow profile measurement. Profiles are measured in all imaginable industrial sectors, from the wood industry to metallurgy to automobile production.

The thermal geometric change under operating conditions needs to be measured on a new type of composite material for gas power plants.

In the field of quality assurance, e.g. in the tire industry, profile measurements of the tread and sidewall must be carried out. Sensors or complete profile measurement benches with precision laser and computer systems can be used for this which relay a fully automatic sequence through to the finished output of the required layout.

Modern operating conditions for trams lead to increased wear of the wheels and rail. In order to document the wear of the rail, our customer has developed a measurement system that detects, automatically evaluates and analyses this data. scanCONTROL laser profile scanners record the profile of the rail.

Tire properties are crucial for safety, driving response and comfort in modern automobiles. To ensure constant quality at the highest level 100% inspection of tires is already required in production. Apart from dynamic stress tests, the acquisition of bulges, constrictions and impacts is of primary importance.

Heat exchangers in plant and machinery serve as heat transfer mechanisms between different material flows. To maximise the heat-emitting area, they are designed using multiple plates. Respectively one connecting flange for the material-conveying cables is welded or soldered onto the last plate. The position and the flatness of the flanges have to fulfil highest requirements so that these can be connected  at  the  desired  point.

Whether in a linear arrangement or a saw blade, saw teeth are used for cutting materials. Due to increasing demands for reproducible production results, saw teeth must fulfill the highest quality standards. The reproducible form of the saw teeth, which are often hardened, is therefore critical. The scanCONTROL 2960-100 laser profile scanner is tilted above the strip to continuously inspect the angle of the cut and the maximum points of the saw tooth edges.

Customers demand flawless products. The first glance and optical appearance are often decisive factors in the purchasing decision. Production errors such as deformations, holes in the surface or undesired protruding edges affect the perfection desired by the customer.

For example, quality control in chocolate production is often a manual process at the end of the production process, either based on tactile measurements or using laser point sensors. This involves high timebasedand financial expenditure. A much more efficient method is to monitor the production process usinglaser scanners from Micro-Epsilon.

The scanCONTROL 2960-100 laser scanner enables 100% control directly in the processing line. The scanCONTROL Configuration Tools software enables easy sensor set up andconfiguration. With a throughput rate of more than 60 m/min, the high speed laser scanners detect each profile of the finished chocolate bars without contact and transmit this to the software. The inspection is now based on predefined parameters.

Testers are integrated in the track bed for the wear control of wheel rims on trains. The profile is checked during the passage of the train. Point-type and line-type lasers measure the diameter and the profile of the wheel. Thus, a precise statement of when the wheel must be reprofiled is possible. The measuring technology thereby is exposed to all weather influences.

Three laser scanners from the scanCONTROL series measure the surface profile of tires. The turnkey tester is at the end of the production line where each tyre is examined for dents and bulges. The tyre is clamped and rotated by 360° within one second. Lettering and symbols are recognised by the software and not assessed as bulges. The process takes place completely automatically and makes a 100% check possible. The tyre is reintroduced back into the production process after completion of the testing.

German automation company Visutronik GmbH from Neubrandenburg, Germany has developed a laser scanningdevice to measure surface soil samples for subsequent geometric analysis: roughness, surface type expansion (e.g. earthworm courses), etc. The core of the measuring device is the scanCONTROL 2700-100 laser scanner.

A faultless surface is indispensable for the functionality of wiper blades. Therefore, wiper blades are inspected by the measuring system after the extrusion in the endless state. In doing so, two scan CONTROL 2800 sensors are used. The inspection is performed above and below the material.

There are several reasons for regular inspection and maintenance:

• Early recognition of wear
• Maintaining travelling comfort
• Ensuring safety

The company Donfabs & Consillia offers an intelligent solution for this: a new maintenance vehicle that performs inspections using measuring sensors from Micro-Epsilon. A total of six laser profile scanners are mounted on the maintenance vehicle. These measure the conductor rails from below and above as well as the lateral guide rails. Thanks to a large measuring range, it is not necessary to move the sensors in order to detect position or dimension deviations, for example

In the production of security keys, the correct blank must be located in the machine before grinding of the teeth can be checked. An optoNCDT 2200 laser sensor traverses across the profile, recording the surface profile precisely while doing so. A measurement profile without any gaps and a very small measuring spot size are important here.

Inrotech A/S i Danmark förlitar sig på givare från Micro-Epsilon för att uppnå optimal kvalitet på svetsfogarna i en helautomatisk process. Företaget har utvecklat en svetsrobot, den så kallade Inrotech-Crawler, som beräknar svetsprocesser i förväg och sedan genomför dem automatiskt. Därför använder roboten de exakta mätvärdena som tillhandahålls av den kraftfulla laserprofilskannern från Micro-Epsilon.

En skanner i scanCONTROL 2900-serien är ansluten till Inrotech-Crawler och upptäcker geometrin för sömmen som ska svetsas innan den faktiska svetsprocessen börjar. Automatiseringen av processen är endast möjlig genom den mycket exakta profilmätningen. Tack vare sin kompakta design med integrerad styrenhet och dess låga vikt är laserprofilscannern lämpad för denna mätuppgift.

De olika anslutningsalternativen via en SDK (Software Development Kit) möjliggör en direkt överföring av den kalibrerade profildata via scanCONTROL DLL till kundens programvara. Weldlogic-tekniken från Inrotech beräknar sedan bland annat antalet svetsprocesser, svetsfogarnas läge, svetshastigheten och svängningsbredden från kalibrerade profildata. Därefter utför crawler automatiskt svetsprocessen.

With sectional doors for parquet or laminate flooring, key and slot joints for individual sections are applied. However, these sections are opened and closed frequently. To enable a robust but permanent flexible key and slot joint, specified  dimensions  are  critical  and  must  be  adhered to. This is particularly important in the case of significant temperature differences or inaccurate dimensions, where the door could be locked or positioned incorrectly. The measurement of the key and slot joint is therefore critical in ensuring the correct manufacturing dimensions.

The demands on car bodywork are increasing, not only from a technical viewpoint, but also with regards to the optical design. Therefore, a door that doesn’t close flush could fulfill the technical purpose but would be detected immediately by the eye of the prospective buyer. A bonnet/hood with different gap sizes on both sides is also a considerable flaw. The typical approach for measuring gaps is to use manual feeler gauges, which is time-consuming and costly. This method is prone to error due to human factors, which is why the gapCONTROL gap sensor is used in modern production lines to inspect bodywork gaps quickly, reliably and consistently.

In any type of vehicle, the braking system is one of the most important safety features. This is why high requirements are placed on all braking system components. When manufacturing brake discs, the different sizes must be strictly adhered to. One critical feature is the gap between the plates of the brake disc. Therefore, the gapCONTROL 2911-25 gap sensor is used.

In the factory research department a fully automatic system for optical geometry measurement has been developed, constructed and integrated into a production line for lift profile rail sections. The system acquires the deviation of±0.2mmfrom straightness in both axes, the length of the section and the thickness of the rail web to ± 0.02 mm in two tracks.

Thanks to their robustness and low weight, fiber-reinforced composite materials are increasingly used in the aviation and automotive industries. Maintenance and repair of such components are challenging tasks for repair shops. The damaged area must be removed layer by layer in order to enable the reconstruction of the laminate layer.

For repair work on airplanes, company SAUER GmbH developed the ULTRASONIC mobileBLOCK, which is a mobile 5-axis milling unit that enables repairs within just a few minutes. As the component can be damaged anywhere, the surface must be measured before the repair process starts. This is where SAUER relies on sensors from Micro-Epsilon.

In order to avoid collisions, the optoNCDT 1302 laser triangulation sensor measures the distance from the surface at a measuring range of 200mm. Subsequently, a scanCONTROL laser scanner measures the surface profile. Next, the program for the repair process is generated based on the  acquired 3D data.

For automatic welding processes, the quality of the weld is often dependent on how precisely the welding head is positioned for the seam place. If the positioning is checked by a measurement system before the welding, unnecessary rejection can be prevented right from the start. The elster company uses the scanCONTROL 2810 profile sensor for this. The position of the scanner to the valve is initially measured eight times before the welding process. The laser welding head is positioned to the seam based on these data.

During the production of windscreens, it can happen that the correct curvature of the windscreen has not been maintained or the fissures and cracks in the surface make the windscreen unusable. A system has been developed for this purpose which inspects the windscreens completely in-line for a surface free from defects. Several confocal sensors on a measuring beam measure the distance to the surface. Using the automatic centering function of the confocal sensors, they track the curvature of the surface precisely. The high resolution makes it possible to inspect the windscreen for cracks and fissures at the same time.