EP0229076A1 - Procede de mesure de pieces a usiner, en particulier de pieces a usiner a rotation symetrique - Google Patents

Procede de mesure de pieces a usiner, en particulier de pieces a usiner a rotation symetrique

Info

Publication number
EP0229076A1
EP0229076A1 EP19860902810 EP86902810A EP0229076A1 EP 0229076 A1 EP0229076 A1 EP 0229076A1 EP 19860902810 EP19860902810 EP 19860902810 EP 86902810 A EP86902810 A EP 86902810A EP 0229076 A1 EP0229076 A1 EP 0229076A1
Authority
EP
European Patent Office
Prior art keywords
optoelectronic
workpiece
transducers
output signals
workpieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19860902810
Other languages
German (de)
English (en)
Inventor
Tilmann Fischer
Hans-Ulrich Krempa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Publication of EP0229076A1 publication Critical patent/EP0229076A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters

Definitions

  • the invention relates to a method for measuring, in particular, rotationally symmetrical workpieces.
  • This method is preferably used in production measurement technology to check mass-produced workpieces, such as crankshafts and / or axes.
  • Pneumatic methods are also known for measuring workpieces of this type, which, however, disadvantageously have to be brought into the immediate vicinity of the workpiece in order to admit nozzle elements for applying air to the workpiece surface to be measured. In addition, a comparatively high effort is required to generate the compressed air.
  • the invention is based on the object of specifying a considerably simplified method for measuring workpieces and a suitable device for carrying out this method.
  • a method for solving this problem emerges from claim 1.
  • Devices for carrying out the method are mentioned in the subclaims.
  • FIG. 3 an enlarged view of parts of the device according to FIG. 1 to explain the measuring method.
  • a workpiece 1 to be measured e.g.
  • a shaft 1 equipped with different diameters D 1, D 2 along the axis 30 is arranged in a holder (not shown) for the measuring operation.
  • a linear dimension is also provided running parallel to the preferred axis 30 of the workpiece 1.
  • the measuring method is intended to check the diameter values of the workpiece and their position along the preferred axis, that is to say also in relation to the linear scale 3.
  • optical cuts are made perpendicular to a preferred workpiece axis, for example to the axis 30 or perpendicular to an upper or lower edge of the workpiece 1 on at least two optoelectronic transducers 2, 2 'are shown, which are arranged to be movable along the linear scale 3.
  • optoelectronic transducers semi-lead detection cameras are expediently used, whose essentially linearly extending light-receiving surfaces are arranged in the cutting plane.
  • the diameter value of the workpiece 1 at the respective measuring position of the optoelectronic transducers is directly proportional, the diameter values determined from the output signals of the optoelectronic transducers 2, 2 'can be clearly determined by means of the linear scale 3 of the respective position of the Assign optoelectronic transducers 2, 2 ', so that ultimately, because of the fixed arrangement of the workpiece 1 to be measured in the measuring arrangement, there is a clear connection between a measured diameter value and the distance of this diameter range of the workpiece 1 from the beginning of the workpiece 1.
  • a diffusely scattering or reflecting optical element e.g. B. a focusing screen 4, which can be illuminated from the rear by a light source 8 if necessary.
  • the output signals 20, 20 'of the optoelectronic converters 2, 2' are preferably fed to a subtractor 7 which forms the difference between the two output signals 20, 20 '.
  • the difference signal formed is fed to a computing unit 6, to which the linear values 3 also supply the positive values of the optoelectronic transducers 2, 2 ', which are in the form of electrical signals.
  • the arithmetic unit 6 assigns these position values to the respectively determined diameter values and, if necessary, leaves them on an output device, e.g. B. log a printer or a plotter.
  • FIG. 3 shows only a part of the workpiece 1 with different graded diameter values D 1, D 2, D 3.
  • the photosensitive surfaces of the optoelectronic transducers 2, 2 ′ are indicated schematically in a first position in the sectional plane 31 and in a second position in the sectional plane 32.
  • sectional plane 31 which, like the second sectional plane 32, is also perpendicular to the preferred axis 30 of the workpiece 1, a larger area of the light-sensitive surfaces of the optoelectronic transducers 2, 2 'is shaded than in the sectional plane 32, since in the cutting plane 31 of the workpiece 1 has a larger diameter D 1.
  • the linear scale 3, which serves to determine the respective position of the optoelectronic transducers 2, 2 ', is also only indicated schematically in the figure.
  • the respective diameter value D 1 or D 2 of the workpiece 1 is determined by forming the difference from the output signals of the optoelectronic converters 2, 2 'and assigned to the position X 1 or X 2.
  • the measuring process can be accelerated further in that a larger number of optoelectronic transducers 2, 2 'are arranged along the linear scale 3 in a stationary manner, which at the same time are located at preferred, prominent locations on the workpiece 1, e.g. B. in the range of diameter jumps, determine the diameter values and simultaneously forward a corresponding number of measured values to the computing unit 6.
  • a particular advantage of this non-contact measurement method is its high flexibility compared to different workpiece geometries. Similar workpieces can be measured by slightly changing the holding device, which is not shown in the figure, without major mechanical obstacles in the same device, a remarkably high level of precision still being achieved

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

Un procédé et un dispositif sont utilisés pour mesurer des pièces à usiner, en particulier des pièces à usiner à rotation symétrique. Des sections optiques perpendiculaires à un axe (30) préféré de la pièce à usiner (1) sont formées sur les surfaces photosensibles d'au moins deux convertisseurs optoélectroniques (2, 2'). Un signal de sortie correspondant au diamètre de la pièce à usiner (1) est obtenu dans un organe de soustraction (7) qui calcule la différence entre les signaux de sortie (20, 20') de ces convertisseurs optoélectroniques. Le signal de sortie ainsi obtenu est fourni à une unité de calcul (6), qui reçoit également un signal de sortie correspondant à la position des convertisseurs optoélectroniques (2, 2') produit par un système linéaire de mesure (3). Des pièces à usiner (1) défectueuses peuvent ainsi être éliminées par comparaison avec des valeurs de consigne enregistrées au préalable.
EP19860902810 1985-03-23 1986-03-22 Procede de mesure de pieces a usiner, en particulier de pieces a usiner a rotation symetrique Withdrawn EP0229076A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853510644 DE3510644A1 (de) 1985-03-23 1985-03-23 Verfahren zur vermessung von insbesondere rotationssymmetrischen werkstuecken
DE3510644 1985-03-23

Publications (1)

Publication Number Publication Date
EP0229076A1 true EP0229076A1 (fr) 1987-07-22

Family

ID=6266173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860902810 Withdrawn EP0229076A1 (fr) 1985-03-23 1986-03-22 Procede de mesure de pieces a usiner, en particulier de pieces a usiner a rotation symetrique

Country Status (3)

Country Link
EP (1) EP0229076A1 (fr)
DE (1) DE3510644A1 (fr)
WO (1) WO1986005583A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817387A1 (de) * 1988-05-19 1989-11-30 Mannesmann Ag Verfahren und vorrichtung zur erfassung der aeusseren gestalt eines langgestreckten, im querschnitt prismatischen koerpers
JPH0312106U (fr) * 1989-06-21 1991-02-07
DE4037934C2 (de) * 1990-11-23 1993-11-25 Mannesmann Ag Verfahren und Vorrichtung zur Messung von Verformungen an Prüfkörpern in Prüfmaschinen
DE4143187A1 (de) * 1991-12-30 1993-07-01 Vma Ges Fuer Visuelle Messtech Vorrichtung zur beruehrungslosen aussendurchmessermessung von glasrohr
IT1281546B1 (it) * 1995-04-13 1998-02-18 Marposs Spa Apparecchio di misura optoelettronico per il controllo di dimensioni lineari
WO1997012200A1 (fr) * 1995-09-28 1997-04-03 Trautwein Sb-Technik Gmbh Dispositif et procede pour la mesure des diametres d'objets
DE102004046752B4 (de) * 2004-09-24 2010-10-21 GOM, Gesellschaft für optische Meßtechnik mit beschränkter Haftung Verfahren zur dreidimensionalen Erfassung von Messobjekten
DE102010007509A1 (de) * 2010-02-11 2011-08-11 Aktiebolaget Skf Verfahren und Vorrichtung zur Vermessung eines Lagerbauteils

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604940A (en) * 1969-08-04 1971-09-14 Laser Systems Corp Radiant energy inspection system for rotating objects
US3749500A (en) * 1970-12-23 1973-07-31 Gen Electric Optical caliper and edge detector-follower for automatic gaging
US4192613A (en) * 1976-01-08 1980-03-11 Martin Hammar Contour detecting and dimension measuring apparatus
DE3314686C2 (de) * 1983-04-22 1985-02-07 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zum Messen des Flächeninhaltes der Projektion eines Prüfkörpers auf eine Ebene

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605583A1 *

Also Published As

Publication number Publication date
WO1986005583A1 (fr) 1986-09-25
DE3510644A1 (de) 1986-10-02

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Inventor name: FISCHER, TILMANN

Inventor name: KREMPA, HANS-ULRICH