DE19758214A1 - Optical precision measuring device for measuring various parameters of workpieces during manufacture - Google Patents
Optical precision measuring device for measuring various parameters of workpieces during manufactureInfo
- Publication number
- DE19758214A1 DE19758214A1 DE1997158214 DE19758214A DE19758214A1 DE 19758214 A1 DE19758214 A1 DE 19758214A1 DE 1997158214 DE1997158214 DE 1997158214 DE 19758214 A DE19758214 A DE 19758214A DE 19758214 A1 DE19758214 A1 DE 19758214A1
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- measuring device
- precision measuring
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- optical precision
- diffraction pattern
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
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- 238000005286 illumination Methods 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 claims description 19
- 239000011159 matrix material Substances 0.000 claims description 9
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- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
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- 238000009826 distribution Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 230000010287 polarization Effects 0.000 claims description 2
- 238000004439 roughness measurement Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
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- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2452—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces
- B23Q17/2471—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces of workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/248—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods
- B23Q17/2495—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods using interferometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2441—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using interferometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Optische Präzisionsmeßeinrichtung zur Bestimmung der Kantenposition, der Kantensteigung und der Rauhigkeitskenngrößen von unbewegten, sowie zur Bestimmung des Durchmessers, der Kreis- und Zylinderformabweichungen bei bewegten rotationssymmetrischen Werkstücken während des Fertigungsprozesses, indem das im Abstandssensor durch Laserbeleuchtung von Objektkanten entstehende zweidimensionale Fresnel'sche Beugungsbild nach Steigung, Dämpfung der Einhüllenden, der Ortsfrequenz und nach Höhenschichtlinien ausgewertet wird.Optical precision measuring device for determining the edge position, the Edge slope and the roughness parameters of unmoved, as well as for determining the Diameter, the circular and cylindrical shape deviations when moving rotationally symmetrical workpieces during the manufacturing process by the in Distance sensor created by laser lighting of object edges two-dimensional Fresnel diffraction pattern according to the slope, damping of the envelope, the spatial frequency and is evaluated according to contour lines.
Zur direkten automatischen Qualitätssicherung bei Zerspan- und Schleifprozessen ist es not wendig, den Meßort in den Arbeitsraum der Bearbeitungsmaschine zu legen und die Mes sungen während der Bearbeitung durchzuführen, um so eine Abweichungskompensation schnell und direkt im Prozeß zu ermöglichen. Bei solchen Prozessen sind der Momentan durchmesser und die Oberflächenstruktur die entscheidenden Regelparameter eines geometrisch adaptiven Regelsystems.It is necessary for direct automatic quality assurance in machining and grinding processes nimble to place the measuring point in the working area of the processing machine and the measuring solutions during processing in order to compensate for deviations enable quickly and directly in the process. With such processes are the moment diameter and the surface structure are the decisive control parameters geometrically adaptive control system.
Formabweichungen, die sich durch Maschinenschwingungen, Energieumsetzung beim Spanen (Temperaturgradienten im Material) oder in Abhängigkeit von der Krafteinleitung (Lager/Drehmeißel) als Kreis- und Zylinderformabweichung bemerkbar machen, sollen über die Messung des Momentandurchmessers und eines mittleren Durchmessers ermittelt werden können.Deviations in shape caused by machine vibrations, energy conversion during Machining (temperature gradients in the material) or depending on the application of force (Bearing / turning tool) as a circular and cylindrical shape deviation, should be about the measurement of the instantaneous diameter and an average diameter can be determined can.
Die Im-Prozeß-Messung gestaltete sich bisher wegen der extremen Umgebungsbedingungen als sehr schwierig und nicht mit der notwendigen Genauigkeit und Auflösung durchführbar. Außerdem konnten die erforderlichen hohen Meßfrequenzen nicht erreicht werden. Man beschränkte sich daher auf Post-Prozeß-Messung, bei der die Qualitätssicherung durch Ent nahme von Stichproben erfolgte. Nach intensiver Reinigung der Werkstücke wurden diese sinnerhalb eines auf Raumtemperatur geregelten Meßraumes meist taktil gemessen. Die gewonnenen Ergebnisse und Erkenntnisse konnten erst nach großer Verzögerung in den Fertigungsprozeß zurückgeführt werden.The in-process measurement has so far been due to the extreme environmental conditions as very difficult and not feasible with the necessary accuracy and resolution. In addition, the required high measuring frequencies could not be achieved. Man was therefore limited to post-process measurement, in which the quality assurance by Ent samples were taken. After intensive cleaning of the workpieces, they became usually measured tactile within a measuring room regulated to room temperature. The The results and findings obtained could only be delayed in the Manufacturing process can be traced.
Mit der in Anspruch 1 kurz beschriebenen Erfindung ist es möglich, durch berührungslose optische Messung während des Fertigungsprozesses bei hohen Oberflächengeschwindigkeiten sehr schnell durch Auswertung eines zweidimensionalen Beugungsbildes Meßwerte über die Gestalt und Oberflächeneigenschaften des Werkstückes mit hoher Auflösung und Präzision zu erhalten. Dabei werden gleichzeitig infolge der berührungslosen Messung Verschleiß von Tastköpfen, bzw. des bearbeiteten Materials und große zufällige Meßabweichungen durch den Schmierfilm auf der Meßoberfläche (Aquaplaning-Effekt) vermieden. Die Ausgangssignale des neuen berührungslosen optischen Sensors liegen aufgrund einer Verarbeitung mit einem Signalprozessor sehr schnell zur Analyse vor. Ein PC-basierter Prozeßrechner übernimmt zum einen die Nachführung des Sensors und zum anderen, nach Kontrolle auf etwaige Ausreißer, die Ausgabe der Meßdaten über eine geeignete Schnittstelle zur Fertigungsregelung. Ein Festplattenspeicher dient der Datenaufzeichnung und Dokumen tation und erlaubt die Ermittlung statistischer Daten, die für die Qualitätssicherung von Be deutung sind.With the invention briefly described in claim 1, it is possible by contactless optical measurement during the manufacturing process at high surface speeds very quickly by evaluating a two-dimensional diffraction pattern, measured values over the Shape and surface properties of the workpiece with high resolution and precision to obtain. At the same time, wear due to the non-contact measurement Probes, or of the processed material and large random measurement errors Avoid the lubricating film on the measuring surface (aquaplaning effect). The Output signals of the new non-contact optical sensor are due to a Processing with a signal processor very quickly for analysis. A PC based Process computer takes over on the one hand the tracking of the sensor and on the other hand, after Check for any outliers, output of the measurement data via a suitable interface for production control. A hard disk memory is used for data recording and documents tion and allows the determination of statistical data necessary for the quality assurance of Be are interpretation.
Das Verfahren der berührungslosen Messung beruht auf der Auswertung des zweidimensio nalen Fresnel'schen Beugungsmusters, das beim Auftreffen eines monochromatischen, kohä renten und parallelen Laserstrahles 5 (Bild 1) auf eine Oberfläche entsteht. Das durch die Kombination aus einer CCD-Zeile 15 und einer CCD-Matrix aufgenommene Beugungsbild läßt dabei Rückschlüsse auf die Kantenstruktur zu.The method of non-contact measurement is based on the evaluation of the two-dimensional Fresnel diffraction pattern, which arises when a monochromatic, coherent and parallel laser beam 5 ( Figure 1) strikes a surface. The diffraction pattern recorded by the combination of a CCD line 15 and a CCD matrix allows conclusions to be drawn about the edge structure.
Durch diametrales Verschieben der gesamten Sensoranordnung, Antastteil 1a und Sende- und Empfangsteil 1b, erreicht man den Beginn des Meßbereiches, wenn der Laserstrahl die Meßoberfläche trifft. Das Meßbereichsende ist erreicht, wenn das Meßobjekt den Strahlengang des Lasers vollständig durchlaufen hat. Das Beugungsbild steht in einer festen Beziehung zur Position des Meßobjektes im Strahlengang.By diametrically shifting the entire sensor arrangement, probing part 1 a and transmitting and receiving part 1 b, the beginning of the measuring range is reached when the laser beam hits the measuring surface. The end of the measuring range is reached when the measurement object has completely passed through the beam path of the laser. The diffraction pattern has a fixed relationship to the position of the measurement object in the beam path.
Der Sendeteil in 1b besteht aus einem durch Kapselung und Temperaturregelung in der Wellenlänge stabilisierten Halbleiterlaser 2. Die elliptische Strahlverteilung wird mit Hilfe einer Linsen/Prismenanordnung korrigiert. Durch diese Anordnung kann der Strahldurchmesser des ausgekoppelten Lichtes und damit der Arbeitsbereich des Sensors eingestellt werden. Über einen Umlenkspiegel 3 wird der Laserstrahl in das Antastsystem 1a gelenkt. Das Licht tritt in den Arbeitsraum über ein Austrittsfenster im Brewsterwinkel zur vereinfachenden Linearpolarisierung des Lichtes ein. Diese Fenster ist zur Vermeidung von Reflexen beidseitig antireflexbeschichtet. Das Interferenzfilter 6, entsprechend der gewählten Laserwellenlänge, dient als Eintrittsfenster für das Beugungsbild in das Antastgehäuse. Über Umlenkspiegel 7 und eine Beobachtungsoptik 8, kombiniert mit einem Raumfilter 9 in Form einer sehr kleinen Lochblende (<50 µm) zur Vermeidung von Störeinflüssen durch Specklerauschen oder Spiegelverschmutzung, wird das Licht in den Sende- und Empfangsteil 1b gelenkt.The transmission part in FIG. 1 b consists of a semiconductor laser 2 stabilized in the wavelength by encapsulation and temperature control. The elliptical beam distribution is corrected with the help of a lens / prism arrangement. With this arrangement, the beam diameter of the outcoupled light and thus the working range of the sensor can be set. The laser beam is directed into the scanning system 1 a via a deflection mirror 3 . The light enters the work area through an exit window at Brewster angle to simplify the linear polarization of the light. This window has an anti-reflective coating on both sides to avoid reflections. The interference filter 6 , corresponding to the selected laser wavelength, serves as an entry window for the diffraction pattern in the probe housing. The light is directed into the transmitting and receiving part 1 b via deflecting mirrors 7 and observation optics 8 , combined with a spatial filter 9 in the form of a very small pinhole (<50 μm) to avoid interference from speckle noise or mirror contamination.
Durch Einsatz eines teildurchlässigen Spiegels 11 zur Strahlteilung wird das Beugungsbild auf zwei optische Empfänger (Kanäle) abgebildet. Der eine Kanal besteht aus einer Blenden-Linsen-Anordnung 12 zur Einstellung der Auflösung und der Bereichsanpassung in Abhängigkeit des gewählten Laserdurchmessers und der CCD-Matrix 13. Diese Linse kann auch als Zylinderlinse ausgeführt werden, um die Auflösung nur in einer Richtung zu beeinflussen. Im zweiten optischen Kanal dient Linse 14 der Einstellung der Auflösung und der Bereichsanpassung in Abhängigkeit des Laserdurchmessers und der CCD-Zeile 15. Die Auflösung wird außerdem durch die Eigenschaften der beiden optischen Empfänger bestimmt.The diffraction pattern is imaged on two optical receivers (channels) by using a partially transparent mirror 11 for beam splitting. One channel consists of a diaphragm-lens arrangement 12 for setting the resolution and the area adjustment depending on the selected laser diameter and the CCD matrix 13 . This lens can also be designed as a cylindrical lens in order to influence the resolution in only one direction. In the second optical channel, lens 14 is used to set the resolution and the range adjustment as a function of the laser diameter and the CCD line 15 . The resolution is also determined by the properties of the two optical receivers.
Die schnelle Analyse der CCD-Zeilendaten nach Durchmesser und Kreisformabweichung ergibt sich nach Substraktion des Gleichlichtes durch Auswerten der Steigung, der Dämpfung der Einhüllenden und der Beschreibung im Ortsfrequenzraum mit Hilfe eines dynamischen Fensters zur Datenreduktion. Durch Parametrierung des Beugungsbildes wird eine Kompensation der Oberflächenkrümmung möglich.The quick analysis of the CCD line data according to diameter and circular shape deviation results from subtraction of the constant light by evaluating the slope, the damping the envelope and the description in spatial frequency space with the help of a dynamic Data reduction window. By parameterizing the diffraction pattern, a Compensation of the surface curvature possible.
Die Analyse der 2D-Daten der CCD-Matrix ergeben nach Gleichlichtsubstraktion die Rauhigkeit und Kantensteigung des Werkstückes. Neben den Informationen der Steigung und der Dämpfung der Einhüllenden werden die Höhenlinien in einer Spektralanalyse ausgewertet. Durch Verknüpfung der Ergebnisse beider Kanäle wird der Durchmesser mit den Werten der Rauhigkeitsmessung ergänzt. Die Meßunsicherheit für den Durchmesser wird auf diese Weise unabhängig von der Rauhigkeit des Werkstückes. Während der Drehung des Werkstückes werden durch Synchronisation mit den Messungen mit Hilfe eines Inkrementalgebers beliebige Punkte des Objektes analysiert, wodurch der Zylindermantel im Beobachtungsfeld präzis und reproduzierbar vermessen werden kann.The analysis of the 2D data of the CCD matrix results in the subtraction of uniform light Roughness and edge slope of the workpiece. In addition to the information of the slope and The contour lines are used to attenuate the envelopes in a spectral analysis evaluated. By linking the results of both channels, the diameter is calculated with the values of the roughness measurement added. The measurement uncertainty for the diameter will in this way regardless of the roughness of the workpiece. During the rotation of the The workpiece is synchronized with the measurements using a Incremental encoder analyzes any points on the object, which means that the cylinder jacket in the Observation field can be measured precisely and reproducibly.
Um eine hohe Auflösung über einen sehr großen Meßbereich erzielen zu können, wurde ein Nachführverfahren mit einer Referenz in Form eines Glasmaßstabes oder eines Interferometers gewählt. Über diese Referenz wird der (ein optisch zweidimensional messender) Abstandssensor diametral zum Werkstück mit Hilfe eines Schrittmotors bewegt. Der Grundabstand wird dabei so elektronisch nachgeregelt, daß stets innerhalb des Meßbereiches des Abstandssensors gearbeitet wird.In order to be able to achieve a high resolution over a very large measuring range, a Tracking procedure with a reference in the form of a glass scale or a Interferometers selected. Using this reference, the (an optically two-dimensional measuring) distance sensor moved diametrically to the workpiece with the help of a stepper motor. The basic distance is so electronically adjusted that always within the Measuring range of the distance sensor is worked.
Um den Einfluß von Anordnung und Lage der Führungsbahnen auf die Meßabweichungen möglichst gering zu halten, werden Präzisionsführungen und -lager in Anlehnung an Koor dinatenmeßmaschinen gewählt.The influence of the arrangement and position of the guideways on the measurement deviations Precision guides and bearings based on Koor are to be kept as low as possible dinatenmeßmaschinen selected.
Der konstruktive Aufbau wurde dahingehend optimiert, daß ein sehr schnelles, aber hochsteifes Antastsystem 1a entsteht, das sowohl zum Messen in engen Nuten, als auch zum Einsatz innerhalb eines engen Arbeitsraumes geeignet ist. Das Antastteil 1a läßt sich beliebig austauschen und so an verschiedene Durchmesser oder Arbeitsumgebungen anpassen.The design has been optimized in such a way that a very fast but highly rigid probe system 1 a is created, which is suitable for measuring in narrow grooves as well as for use within a narrow working space. The contact part 1 a can be exchanged as desired and thus adapted to different diameters or working environments.
Umgebungstemperaturschwankungen bleiben durch Kapselung des Meßsystems, bei gleichzeitiger Regelung der Gehäuseinnentemperatur ohne merklichen Einfluß auf das Ergebnis. Durch Freiblasen mit an die Aufgabe angepaßten Hochdruckdüsen 17 und durch Verwendung von Gummiabweisern mit Abstreifern 16 wird die Meßoberfläche nahezu span- und schmierfilmfrei gehalten. Durch präzise Messung der Temperatur, des Druckes und des Wasserdampfpartialdruckes der umgebenden Luft im Antastbereich des Sensors werden, wie von Interferometermessungen her bekannt, die Schwankungen der Brechzahl von Luft mit Hilfe der Edlen-Formel korrigiert. [Edlen, Bengt, The refractive of Air, Metrologia, Vol. 2, No. 2, 1966].Ambient temperature fluctuations remain due to encapsulation of the measuring system, with simultaneous regulation of the housing internal temperature without any noticeable influence on the result. By blowing free with high-pressure nozzles 17 adapted to the task and by using rubber deflectors with wipers 16 , the measuring surface is kept almost free of chip and lubricating film. As is known from interferometer measurements, the fluctuations in the refractive index of air are corrected using the noble formula by precise measurement of the temperature, the pressure and the water vapor partial pressure of the surrounding air in the contact area of the sensor. [Nobles, Bengt, The refractive of Air, Metrologia, Vol. 2, No. 2, 1966].
Die in Anspruch 1 kurz beschriebenen Erfindung eignet sich wegen der Berücksichtigung von Kompensationsverfahren, Integration analytischer Verfahren und trickreicher konstruktiver Maßnahmen zum Einsatz als Im-Prozeß-Meßeinrichtung. Mit dieser Erfindung ist es möglich, durch berührungslose optische Messung während des Fertigungsprozesses bei hohen Oberflächengeschwindigkeiten sehr schnell durch Auswertung eines zweidimensionalen Beugungsbildes Meßwerte über die Gestalt und Oberflächeneigenschaften des Werkstückes mit hoher Auflösung und Präzision zu erhalten. Die Erfindung nach Anspruch 1 eignet sich daher als Meßeinrichtung innerhalb eines geometrisch adaptiven Regelkreises.The invention briefly described in claim 1 is suitable because of the consideration of Compensation procedure, integration of analytical procedures and more tricky constructive Measures for use as an in-process measuring device. With this invention it is possible through contactless optical measurement during the manufacturing process at high Surface speeds very quickly by evaluating a two-dimensional Diffraction pattern Measured values about the shape and surface properties of the workpiece with high resolution and precision. The invention according to claim 1 is suitable therefore as a measuring device within a geometrically adaptive control loop.
Claims (41)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997158214 DE19758214A1 (en) | 1997-12-31 | 1997-12-31 | Optical precision measuring device for measuring various parameters of workpieces during manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997158214 DE19758214A1 (en) | 1997-12-31 | 1997-12-31 | Optical precision measuring device for measuring various parameters of workpieces during manufacture |
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| Publication Number | Publication Date |
|---|---|
| DE19758214A1 true DE19758214A1 (en) | 1999-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| DE1997158214 Withdrawn DE19758214A1 (en) | 1997-12-31 | 1997-12-31 | Optical precision measuring device for measuring various parameters of workpieces during manufacture |
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| DE (1) | DE19758214A1 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT410257B (en) * | 2000-10-23 | 2003-03-25 | Mte Innovative Measurement Sol | DEVICE FOR CHECKING AND CHECKING A SINGLE GLASS PANEL OR INSULATING GLASS ELEMENT |
| DE10208990A1 (en) * | 2002-02-28 | 2003-09-18 | Heller Geb Gmbh Maschf | Method for measuring and monitoring machining steps during computer controlled machining of a workpiece, especially a crank- or camshaft, involves using image processing system and comparing workpiece measurements to set values |
| CN100464154C (en) * | 2006-07-07 | 2009-02-25 | 中国科学院长春光学精密机械与物理研究所 | A Photoelectric Large Diameter Measuring Device |
| DE102008009842A1 (en) | 2008-02-08 | 2009-10-22 | Universität Stuttgart | Method for measuring edge chipping after or during processing of e.g. wooden plates, involves gripping edge of plate such that brightness values resulting along contact line are detected based on light gap sections |
| CN102135502A (en) * | 2010-12-20 | 2011-07-27 | 深圳大学 | Laser flaw detection system and flaw detection method |
| CN102554705A (en) * | 2012-02-28 | 2012-07-11 | 天津微纳制造技术有限公司 | Compensation machining method for optical free-form surfaces |
| EP2363238A3 (en) * | 2010-03-02 | 2013-01-02 | Traub Drehmaschinen GmbH & Co. KG | Machine tool with workpiece measuring device |
| FR2978545A1 (en) * | 2011-07-28 | 2013-02-01 | Diamonde | TEST AND MEASURING BENCH FOR ROTARY TOOLS FOR WORKING WOOD OR SIMILAR MATERIAL |
| RU2544713C1 (en) * | 2013-10-23 | 2015-03-20 | Геннадий Алексеевич Копылов | Method of mechanical treatment of stocks on nc machines |
| EP2894461A1 (en) | 2014-01-10 | 2015-07-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Measuring device and measuring method for measuring an indicator by means of a bend analysis |
| CN107234487A (en) * | 2017-05-31 | 2017-10-10 | 天津大学 | Moving component multi-parameter detecting method based on combinatorial surface type standard |
| CN111256606A (en) * | 2020-03-18 | 2020-06-09 | 北京航空航天大学 | Equipment and method for measuring gap of rotating-static structure in real time |
| WO2022157310A1 (en) | 2021-01-22 | 2022-07-28 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method and device for creating meaningful cut edge images |
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|---|---|---|---|---|
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