WO2003078924A2 - Procede et dispositif permettant d'acquerir au moins une section d'un outil ou un outil - Google Patents

Procede et dispositif permettant d'acquerir au moins une section d'un outil ou un outil Download PDF

Info

Publication number
WO2003078924A2
WO2003078924A2 PCT/EP2003/002691 EP0302691W WO03078924A2 WO 2003078924 A2 WO2003078924 A2 WO 2003078924A2 EP 0302691 W EP0302691 W EP 0302691W WO 03078924 A2 WO03078924 A2 WO 03078924A2
Authority
WO
WIPO (PCT)
Prior art keywords
tool
individual images
workpiece
camera
overall image
Prior art date
Application number
PCT/EP2003/002691
Other languages
German (de)
English (en)
Other versions
WO2003078924A3 (fr
Inventor
Christoph Zoller
Christian Pfau
Original Assignee
E. Zoller Gmbh & Co. Kg
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 E. Zoller Gmbh & Co. Kg filed Critical E. Zoller Gmbh & Co. Kg
Priority to AU2003222761A priority Critical patent/AU2003222761A1/en
Publication of WO2003078924A2 publication Critical patent/WO2003078924A2/fr
Publication of WO2003078924A3 publication Critical patent/WO2003078924A3/fr

Links

Classifications

    • 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

Definitions

  • the invention is based on a method and a device for detecting at least a section of a workpiece or a tool according to the preamble of claim 1.
  • the invention is based on the object of further developing a generic method and a generic device, specifically to the effect that a workpiece or a tool can be completely represented in incident light with a high information content in a desired display area. It is solved according to the invention by the features of the independent claims. Further refinements result from the subclaims.
  • the invention is based on a method for capturing at least a section of a workpiece or a tool, in particular a cutting tool, with at least one camera for recording individual images in incident light and with at least one data processing system.
  • a camera can advantageously be used to scan areas in incident light for the subsequent generation of a 3D model of the area in a cost-effective manner in addition to the generation of even sharply defined images.
  • the image capture area is approximately 1 x 1 mm to determine the overall image with a high information content.
  • the workpiece or tool to be gripped can be displayed completely regardless of its size, and advantageously axial and radial sections of the workpiece or tool can be recorded and measured manually or automatically on the basis of the overall image.
  • the size of the workpiece or tool only depends on a possible travel range of a measuring device and can be, for example, from 0.2 mm to 40 mm.
  • the use of a cost-intensive zoom and / or a wide-angle lens and an associated necessary lens Switching with loss of accuracy can advantageously be avoided. Additional calibration effort for the lens and costs, in particular costs for interchangeable lenses, can be avoided.
  • an overall picture of the workpiece or tool can be achieved with a high resolution / accuracy.
  • the entire workpiece or the entire tool or only the section that is to be precisely recorded can be determined quickly and easily and overall time saved become.
  • the section and / or a detection path is advantageously determined at least partially automatically on the basis of the rough detection.
  • An operator-independent, convenient method can be achieved with which the section of the workpiece or the tool and / or the detection path can be detected quickly, e.g. a cutting edge, a surface, etc.
  • the operator can manually determine the section to be detected and / or the detection path on the basis of positions and / or data.
  • the individual images be limited by start and target coordinates.
  • start and destination coordinates By specifying the start and destination coordinates, an amount of data can be kept small and the time required to acquire the individual images can be reduced.
  • the determination of the start and target coordinates is carried out automatically, for example for the large ben detection of the workpiece or tool.
  • the workpiece or the tool can be recorded fully automatically in the desired section and costs, in particular personnel costs for the operator for determining the start and target coordinates, can be saved.
  • a calculation of a required number of individual images and their recording progress be carried out at least partially automatically.
  • the operator can advantageously determine the number of individual images or have them determined automatically in a selectable mode. If the number of individual images is determined fully automatically, a gapless and sharp overall image can be achieved in which any overlaps of sharply depicted sections of the individual images can advantageously be reduced. Storage space and acquisition time can be saved and costs can be reduced.
  • the individual images can be combined to form an overall image in various ways, which the person skilled in the art considers useful, e.g. spiral, flat, line-like, etc. If the individual images are recorded and joined together in a contiguous row, the overall image can advantageously be produced along a cutting edge of a cutting edge. If, on the other hand, the individual images are recorded over an area, such as in particular around a centered individual image, the overall image of a surface, such as in particular a cutting tip of a drill, can advantageously be produced.
  • an overall image with a high depth of field in particular with a surface running obliquely to a recording plane, and a high information content resulting therefrom can be achieved, the overall image being able to have the size of a single image or the size of several individual images.
  • about 10-30 single images can be taken for a corresponding position of the respective single image over a depth range of approx. 1-3 mm.
  • the overall picture is advantageously stored. Handling and / or subsequent processing of the stored images and / or data can be simplified.
  • the overall image can be saved after the workpiece or tool has been captured with all the individual images or in parallel with the acquisition of each individual image, it being possible for the most current individual images to be added to the individual images already stored and combined to form an overall image. If the entire image is stored in parallel to the acquisition of the individual images, a data volume can be kept small and the computing power and system resources of the data processing system can be reduced.
  • a measurement of the section of the workpiece or the tool is carried out on the basis of the overall image, geometries and contours that extend over several individual images can be measured simply and precisely, such as in particular angles, radii, slopes, cutting edges, surfaces, etc. Furthermore, actual values of the Workpiece or tool with target values are compared and production-related and / or wear-related deviations are determined automatically and / or manually. Using a so-called "teach-in method", the method can be automated and adapted to different requirements, so that in particular workpieces and / or tools of the same type can be conveniently and quickly measured.
  • zooming takes place on the basis of the stored overall image. Different areas can be on one
  • Output unit in particular a screen and / or a printer, are displayed in different sizes, with the stored overall image being available for each size display. A loss of information due to data compression for a corresponding, previous representation can advantageously be avoided.
  • a device for recording at least a section of the workpiece or the tool with a camera in incident light and with at least one data processing system is proposed, with which at least partial areas of the individual images of the camera in the data processing system can be combined to form an overall image.
  • a lens of the camera have a fixed aperture.
  • An inexpensive lens can be achieved which has a simple structure and costs, in particular production costs, can be reduced. Furthermore, errors caused by a movable screen can be avoided. If the lens has a shallow depth of field, in particular less than 0.1 mm, a distance between the lens and a point on the workpiece or tool that is sharply imaged by the lens can be determined simply and precisely via the focal length of the lens.
  • the determined distances can be used to obtain depth information with which individual parameters of the workpiece or the tool can be determined, such as a position of the section with respect to an existing coordinate system Clearance angle and / or a rake angle of a tool cutting edge, etc. Furthermore, imaging errors can be kept small in the case of lenses with a shallow depth of field.
  • any point on the workpiece or on the tool can advantageously be depicted sharply.
  • the distance can be changed by making a holder for the workpiece or for the tool movable, or by advantageously making the lens movable.
  • a structurally simple device can be achieved with which the distance between the objective and the workpiece or tool can be determined.
  • Fig. 1 is a schematic representation of a setting and measuring device
  • Fig. 2 is a schematic representation of a composition of sharply depicted partial areas of several shots to form a sub-overall image
  • Fig. 3 is a schematic representation of a single image in incident light
  • Fig. 4 on an overall image output on a screen
  • FIG. 5 an enlarged representation of the overall image from FIG. 4, composed of the individual images.
  • the adjusting and measuring device has an optics carrier 35 which is mounted on a measuring slide 41.
  • the measuring slide 41 is movably supported on linear axes, not shown.
  • Two CCD cameras 13, 36 for capturing the tool 12 in transmitted light and incident light are mounted on the optics carrier 35.
  • the CCD cameras 13, 36 are connected to a data processing system 29 via lines (not shown in more detail).
  • the CCD camera 13 takes individual images 14-28 of the tool 12, the CCD camera 13 having an objective 33 with a fixed aperture and with a shallow depth of field (FIGS. 3 and Fig. 4).
  • the tool 12 is introduced into a rotatable tool holder 37 and held by the latter.
  • the CCD camera 13 and its incident light illumination 38 are positioned manually and / or automatically at a known distance 34 from the tool 12.
  • the incident light illumination 38 is then switched on and preferably dimmed, so that a light intensity and an illuminating direction 39 of the reflected light illumination 38 illuminate a section 11 visible from the CCD camera 13.
  • a first step the tool 12 is roughly recorded.
  • the optics carrier is moved with the CCD camera 13 in the direction of the tool 12.
  • the tool 12 or the section 10 to be recorded is then recorded in a refined manner in a second step.
  • start and target coordinates 31, 32 are specified to limit a number of the individual images 14-28, it being possible for the start and target coordinates 31, 32 to be determined manually or also automatically on the basis of predetermined criteria.
  • the number of the individual images 14-28 required and their recording progress between the start and target coordinates 31, 32 are automatically determined by the data processing system 29. calculates, the recording progress corresponding to a maximum of an imaging area of the CCD camera 13 of approximately 1 ⁇ 1 mm.
  • the first individual image 14 or the first sub-overall image 45 After the first individual image 14 or the first sub-overall image 45 has been recorded, the same is stored in a buffer of the data processing system 29 and the imaging area of the CCD camera 13 is moved to determine the recording progress.
  • the following individual image 15 or the following sub-overall image is added to the first individual image 14 or to the first sub-overall image 45 in the buffer of the data processing system 29.
  • the method continues until the individual images 14-28 or the sub-overall images are combined in the buffer to form an overall image 30 of the desired section 10.
  • the overall image 30 of the individual images 14-28 or of the sub-overall images is then stored in the data processing system 29.
  • the tool 12 is then measured on the basis of the overall image 30.
  • the overall image 30 is output to an output unit, such as a screen 40 (FIGS. 4 and 5). If partial areas of the overall image 30 are zoomed on the screen 40, enlargement takes place in each case on the basis of the stored overall image 30, so that a loss of information can be avoided (FIG. 5).
  • the individual images 17, 18, 24, 25, which do not contain any information about the tool 12, can be colored or even deleted for an improved overall image 30 in order to reduce an amount of data that has arisen.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

L'invention concerne un procédé permettant d'acquérir au moins une section (10) d'un outil ou un outil (12), en particulier un outil d'enlèvement de copeaux, au moyen d'au moins une caméra (13) servant à prendre des images individuelles (14-8) en lumière incidente, et à l'aide d'au moins un dispositif de traitement de données (29). Selon l'invention, au moins des zones partielles des images individuelles (14-28) acquises par la caméra (13) sont réunies pour former une image d'ensemble (30).
PCT/EP2003/002691 2002-03-18 2003-03-14 Procede et dispositif permettant d'acquerir au moins une section d'un outil ou un outil WO2003078924A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003222761A AU2003222761A1 (en) 2002-03-18 2003-03-14 Method and device for detecting at least one section of a workpiece or tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002112004 DE10212004A1 (de) 2002-03-18 2002-03-18 Verfahren und Vorrichtung zur Erfassung zumindest eines Abschnitts eines Werkstücks oder eines Werkzeugs
DE10212004.8 2002-03-18

Publications (2)

Publication Number Publication Date
WO2003078924A2 true WO2003078924A2 (fr) 2003-09-25
WO2003078924A3 WO2003078924A3 (fr) 2004-02-05

Family

ID=27797889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/002691 WO2003078924A2 (fr) 2002-03-18 2003-03-14 Procede et dispositif permettant d'acquerir au moins une section d'un outil ou un outil

Country Status (3)

Country Link
AU (1) AU2003222761A1 (fr)
DE (1) DE10212004A1 (fr)
WO (1) WO2003078924A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284486A3 (fr) * 2004-12-16 2013-10-02 Werth Messtechnik GmbH Appareil de mesure de coordonnées et procédé de mesure à l'aide d'un appareil de mesure de coordonnées
US8711365B2 (en) 2004-12-16 2014-04-29 Werth Messtechnik Gmbh Coordinate measuring device and method for measuring with a coordinate measuring device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341666B4 (de) * 2003-09-08 2011-01-13 Werth Messtechnik Gmbh Verfahren zum Messen von Geometrien von im Wesentlichen zweidimensionalen Objekten
DE102005016791A1 (de) * 2005-04-12 2006-10-19 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Mess- und/oder Einstellgerät mit einer Bilderfassungseinheit
DE102007044000A1 (de) 2007-09-14 2009-04-02 Esco Gmbh Engineering Solutions Consulting Verfahren zur Bestimmung einer Raumform eines Werkstücks
DE102007047499B4 (de) * 2007-10-04 2017-04-13 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Verfahren und Vorrichtung zur Erfassung von Informationen eines Werkzeugs
DE202008011614U1 (de) * 2008-08-30 2008-11-06 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Werkzeugeinstell- und Messgerät
DE102008055665A1 (de) * 2008-11-03 2010-05-06 E. Zoller GmbH & Co. KG Einstell- und Messgeräte Werkzeugmessgerät
DE102010011634B3 (de) * 2010-03-16 2011-09-15 Kirner Maschinenbau Gmbh Verfahren zum Vermessen der Schneidengeometrie von Fräswerkzeugen
DE102012106156B4 (de) * 2012-07-09 2019-09-12 Acsys Lasertechnik Gmbh Verfahren zur Steuerung eines Werkzeuges

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151257A2 (fr) * 1984-02-08 1985-08-14 Dornier Gmbh Procédé pour la production d'images codées en distance
DE3406375A1 (de) * 1984-02-22 1985-08-22 SIGNUM Computer für Signalverarbeitung und Mustererkennung GmbH, 8000 München Geraet zur bestimmung von oberflaechenprofilen von nichttransparentem material durch digitale auswertung einer sequenz von mikroskopbildern mit unterschiedlichen schaerfeebenen
DE19941771A1 (de) * 1999-09-02 2001-03-15 Zoller Gmbh & Co Kg E Verfahren zur Vermessung von Werkstücken, insbesondere ein- oder mehrschneidigen Zerspanungswerkzeugen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151257A2 (fr) * 1984-02-08 1985-08-14 Dornier Gmbh Procédé pour la production d'images codées en distance
DE3406375A1 (de) * 1984-02-22 1985-08-22 SIGNUM Computer für Signalverarbeitung und Mustererkennung GmbH, 8000 München Geraet zur bestimmung von oberflaechenprofilen von nichttransparentem material durch digitale auswertung einer sequenz von mikroskopbildern mit unterschiedlichen schaerfeebenen
DE19941771A1 (de) * 1999-09-02 2001-03-15 Zoller Gmbh & Co Kg E Verfahren zur Vermessung von Werkstücken, insbesondere ein- oder mehrschneidigen Zerspanungswerkzeugen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284486A3 (fr) * 2004-12-16 2013-10-02 Werth Messtechnik GmbH Appareil de mesure de coordonnées et procédé de mesure à l'aide d'un appareil de mesure de coordonnées
US8711365B2 (en) 2004-12-16 2014-04-29 Werth Messtechnik Gmbh Coordinate measuring device and method for measuring with a coordinate measuring device

Also Published As

Publication number Publication date
DE10212004A1 (de) 2003-10-02
AU2003222761A8 (en) 2003-09-29
WO2003078924A3 (fr) 2004-02-05
AU2003222761A1 (en) 2003-09-29

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