WO2008000411A1 - Procédé et dispositif de mesure d'ébauches - Google Patents

Procédé et dispositif de mesure d'ébauches Download PDF

Info

Publication number
WO2008000411A1
WO2008000411A1 PCT/EP2007/005583 EP2007005583W WO2008000411A1 WO 2008000411 A1 WO2008000411 A1 WO 2008000411A1 EP 2007005583 W EP2007005583 W EP 2007005583W WO 2008000411 A1 WO2008000411 A1 WO 2008000411A1
Authority
WO
WIPO (PCT)
Prior art keywords
blank
contour
finished part
values
scanning device
Prior art date
Application number
PCT/EP2007/005583
Other languages
German (de)
English (en)
Inventor
Armin Klotz
Original Assignee
Maschinenfabrik Alfing Kessler 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 Maschinenfabrik Alfing Kessler Gmbh filed Critical Maschinenfabrik Alfing Kessler Gmbh
Publication of WO2008000411A1 publication Critical patent/WO2008000411A1/fr

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
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/003—Measuring of motor parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile

Definitions

  • the invention relates to a method for measuring raw parts, in particular mechanically unprocessed large crankshaft, according to the closer defined in the preamble of claim 1. Art Furthermore, the invention relates to an apparatus for measuring raw parts, in particular of mechanically unprocessed large crankshaft.
  • a generic method and a corresponding device are known from EP 0 081 376 A2.
  • a plurality of points on the surface of the blank are successively determined on a crankshaft for an internal combustion engine by means of a laser rangefinder, and from this the envelope of the blank is calculated. It is then determined whether the machined finished part fits into the envelope of the blank.
  • the time for measuring a blank can be greatly reduced, which leads to a considerable cost saving, which also contributes to the reduction of rejects during the subsequent mechanical finishing.
  • a six-stroke Caubeilwelle with one of about 5.5 m in a time of less than 30 min can be completely scan, add and evaluate.
  • reference points are defined on the surface of the blanks.
  • a device according to the object of the problem results from the features of claim 5.
  • the method according to the invention can be carried out in a very simple manner, whereby all the above-mentioned advantages of the method according to the invention can be utilized.
  • the device is advantageously relatively simple and can therefore be realized at relatively low cost.
  • Fig. 1 is a side view of the device according to the invention for carrying out the method according to the invention.
  • Fig. 2 is a front view of the device according to the arrow II of Fig. 1st
  • FIGS. 1 and 2 show an apparatus 1 for measuring blanks 2, in the present case a mechanically untreated large crankshaft 2 a.
  • large crankshafts 2a are understood in this context crankshafts with a length of at least 1.2 m, as used for example in tanks or ships.
  • From the example produced by forging blank 2 is by mechanical finishing, in particular by a machining, such.
  • dimensionally stable finished part in the present case, therefore, provided for installation in an internal combustion engine large crankshaft 2a. Since the operations required for the mechanical finishing of crankshafts are known per se, this will not be discussed further here.
  • the required machining allowance before the mechanical finish machining can be, for example, 5 mm. This means that in the present case, the blank 2 must be 5 mm larger than the finished part at any point in comparison with the finished part.
  • the blank 2 is clamped, for example, between two opposite clamping devices 3 and 4, so that it can be turned by hand or with corresponding devices. If necessary, the raw material Part 2, however, be fixed in this position.
  • the two clamping devices 3 and 4 are part of a centering machine, not shown in its entirety, which is able to introduce necessary for later processing centering holes in the blank 2.
  • the device 1 has a device 5 for comparing measured actual values with nominal values of a nominal contour of the finished part or a nominal contour of the blank 2, which in turn has a scanning device 6 and a data processing device 7 connected to the scanning device 6.
  • the scanning device 6, which is preferably designed as a camera, is capable of measuring a multiplicity of points on the surface of the blank 2, that is to say a point cloud, in which it makes corresponding recordings or scans from the blank 2.
  • the scanning device 6, also referred to as a camera projects within its scan field a line onto the blank 2, which becomes a surface by displacement. For example, the scan duration per shot may be approximately 2.5 s.
  • the scanning device 6 can have an additional display.
  • the data processing device 7 to a three-dimensional actual contour of the blank 2 and compared with the desired contour of the finished part or the desired contour of the blank 2.
  • the target values of the finished part or of the blank 2 can be present, for example, as CAD data. If the actual contour of the blank 2 is compared with the desired contour of the finished part, the allowance for the subsequent mechanical processing of e.g. 5 mm.
  • reference points are set on the surface of the blank, so that the data processing device 7 by stacking the Reference points can easily combine the individual recordings.
  • the reference points are carried with the device 5, fixedly mounted on the table of the centering or glued onto the blank 2.
  • they In order to assemble the individual recordings, they have an overlap of approximately one third of the total size of the recording.
  • the result of the target / actual comparison is displayed in false colors and at the same time a measurement report is output.
  • a display and a printer can be connected to the data processing device 7 in order to display the actual or the target contour in color and to create a printout.
  • the measuring system operates automatically and without contact and is able to detect the blank 2 over the entire surface, in particular with regard to free-form surfaces resulting from the respective construction of the blank 2.
  • the scanning device 6 is mounted on a handling device 8 which is movable in several axes and in the present case embodied as a ⁇ -axis robot, which is guided on a linear guide 9 and displaceable in the longitudinal direction of the blank 2.
  • the handling device 8 it is possible to move the scanning device 6 relative to the blank 2.
  • the blank 2 is rotated by the controller, preferably connected to the device 5, and re-referenced via the attached reference points.
  • labeling device 10 After measuring the blank 2 by means of an attached in the present case to the scanning device 6 labeling device 10, for example, with specifications for its further mechanical processing or its post-processing, but also with settings with direction information for setting chucks, with points and directions for later straightening , with the contour of the reference part in areas with Undersize and provided with length and Hubwolfsmark isten.
  • the labeler 10 may have a similar operation as a per se known inkjet printer, but a liquid adhered to the blank 2, such as water-resistant ink, should be used.
  • the scanning device 6 may, for example, a scan field of about 40 x 60 cm, a distance of 1.2 m to the component, a scanning depth of +/- 0.2 m and a scan time of about 2.5 s. Due to the size of the scan field, the blank 2 can be completely detected within a very short time, in the present case, the period for scanning, calculating, visualizing and labeling a blank with a length of 5.5 m maximum about 30 min. is.
  • the device 1 can be combined with other measuring means, e.g. tactile or optical measuring means equipped.

Landscapes

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

Abstract

Dans un procédé de mesure d'ébauches (2), en particulier de vilebrequins grossiers non usinés mécaniquement (2a), avant leur usinage final mécanique et pour déterminer si, à partir de l'ébauche (2), on peut fabriquer une pièce finie, ayant les dimensions prescrites, par usinage final mécanique, des valeurs réelles mesurées sont comparées à des valeurs nominales d'un contour nominal de la pièce finie ou d'un contour nominal de l'ébauche (2). Au moyen d'un dispositif de scannage (6), une pluralité de points est détectée simultanément sur la surface de l'ébauche (2) et ajoutée au moyen d'un dispositif (8) de traitement des données à un contour réel tridimensionnel de l'ébauche (2), lequel est comparé au contour nominal de la pièce finie ou au contour nominal de l'ébauche (2).
PCT/EP2007/005583 2006-06-27 2007-06-25 Procédé et dispositif de mesure d'ébauches WO2008000411A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610029786 DE102006029786A1 (de) 2006-06-27 2006-06-27 Verfahren und Vorrichtung zum Vermessen von Rohteilen
DE102006029786.5 2006-06-27

Publications (1)

Publication Number Publication Date
WO2008000411A1 true WO2008000411A1 (fr) 2008-01-03

Family

ID=38564431

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/005583 WO2008000411A1 (fr) 2006-06-27 2007-06-25 Procédé et dispositif de mesure d'ébauches

Country Status (2)

Country Link
DE (1) DE102006029786A1 (fr)
WO (1) WO2008000411A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012101957U1 (de) 2012-05-29 2013-09-02 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Datenverarbeitungseinrichtung zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A2 (fr) 2012-05-29 2013-12-04 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie
US11197787B2 (en) 2011-07-08 2021-12-14 The Procter & Gamble Company Absorbent article package with enhanced opening and recloseability

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081376A2 (fr) * 1981-12-09 1983-06-15 Gkn Technology Limited Dispositif de centrage d'un vilebrequin
US5619587A (en) * 1991-05-10 1997-04-08 Aluminum Company Of America System and method for contactlessly gauging the thickness of a contoured object, such as a vehicle wheel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081376A2 (fr) * 1981-12-09 1983-06-15 Gkn Technology Limited Dispositif de centrage d'un vilebrequin
US5619587A (en) * 1991-05-10 1997-04-08 Aluminum Company Of America System and method for contactlessly gauging the thickness of a contoured object, such as a vehicle wheel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11197787B2 (en) 2011-07-08 2021-12-14 The Procter & Gamble Company Absorbent article package with enhanced opening and recloseability
DE202012101957U1 (de) 2012-05-29 2013-09-02 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Datenverarbeitungseinrichtung zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A2 (fr) 2012-05-29 2013-12-04 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie
DE102012104605A1 (de) 2012-05-29 2013-12-05 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Verfahren zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A3 (fr) * 2012-05-29 2014-01-22 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie

Also Published As

Publication number Publication date
DE102006029786A1 (de) 2008-01-03

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