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WO1987007007A1 - Procede et appareil permettant le calibrage precis et sans contact de parties mecaniques - Google Patents

Procede et appareil permettant le calibrage precis et sans contact de parties mecaniques Download PDF

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Publication number
WO1987007007A1
WO1987007007A1 PCT/SE1987/000230 SE8700230W WO8707007A1 WO 1987007007 A1 WO1987007007 A1 WO 1987007007A1 SE 8700230 W SE8700230 W SE 8700230W WO 8707007 A1 WO8707007 A1 WO 8707007A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring
axis
machine part
axial
measuring device
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.)
Ceased
Application number
PCT/SE1987/000230
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English (en)
Inventor
Christer Marklund
Lars Stenberg
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.)
ELOPTRICON AB
Original Assignee
ELOPTRICON AB
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 ELOPTRICON AB filed Critical ELOPTRICON AB
Publication of WO1987007007A1 publication Critical patent/WO1987007007A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques

Definitions

  • the present invention relates to a process for contactlessly and accurately gauging serially mass produced machine parts which have a rotational axis defined in their design along which there are situated finely finished surfaces that are distinct from one another, which method comprises irradiating the surfaces with light that gives rise to electic signals from which a measure ⁇ ment number for the surfaces is determined.
  • the invention also relates to an apparatus by means of which such a method is practiced.
  • a type of machine part with which the invention is particularly but not exclusively concerned is shafts that have beari ⁇ sur ⁇ faces finished to accurate dimensions and which must b suged before they are assembled.
  • Examples of such shafts are crank- shafts and camshafts that are used in combustion engines and which are now often produced in prolonged series on automatic machines.
  • bearing surfaces concentric to the rotational axis that will fit in the main bearings of an engine block, and on the other hand one or several bearing surfaces situated between the main bearing surfaces and eccentric to them, for the engine connecting rod or connecting rods.
  • sur ⁇ faces like those just mentioned are bounded in the axial direc ⁇ tion by ring-shaped bearing surfaces situated at right angles to the axis of rotation.
  • the motor manufacturer places a high demand for dimensional and form accuracy on mashine parts with such bearing surfaces, so that for every produced unit it is desired to set forth absolute values for all existing diameter dimensions and shaft radii as well as the angle position for crankshaft surfaces.
  • Gauging thus has as its object to establish that tolerances prescribed in the design are maintained with respect to the roundness of the sur ⁇ face, its conicity and straightness, as well as with respect to whether the centerline of the main bearing coincides with the rotational axis of the shaft.
  • other checking items can exist, based upon those obtained absolute values. It is thus an accurate geometrical total picture of the measured object that one desires to obtain.
  • a wholly manual gauging of the type of measured object with which the in ⁇ vention is particularly concerned is very time consu ⁇ ng and therefore makes overall gauging impossible, and it is also diffi ⁇ cult to obtain from all of the measurement data, without waste of time, a total picture of the geometry of the measured object that precedes the decision to approve or reject an object.
  • the intent in this is to eliminate the inconveniences that are associated with heretofore known measuring methods and apparatus and in this way to endeavor to carry out gauging of machine parts quickly and with the least possible manual contri ⁇ bution without neglecting the requirement for a high quality in the measuring.
  • a particular object of the invention is to provide a process and apparatus that is well adapted for the gauging of crankshafts, camshafts and the like and which in this way solves the problem of accurately and contactlessly gauging both bearing surfaces that are concentric or eccentric relative to the rotational axis and bearing surfaces that extend in the axial direction.
  • the process shall be suitable for being carried out in the apparatus in a predetermined, pref ⁇ erably programmable and wholly automatic procedure which takes its start from a machine part being carrid forward in a given manner to the apparatus, after which the latter carries out all of the measuring operations in a sequence and produces the required measurement data for the machine part in suitable form, and which procedure is repetitive so that it can be applied to an automatic production system.
  • FIG. 1 and 2 are side views of a crankshaft and of a crankshaft, respectively;
  • Fig. 3 is a view in perspective of apparatus according to the invention
  • Fig. 4 is a view partly in section showing means for coupling a shaft end to the apparatus
  • FIGs. 5 and 6 show in perspective a measuring device of the apparatus for radial measurement and axial measurement, respec ⁇ tively;
  • FIG. 7 is a diagram showing a measuring signal that is obtained in measuring of a radial measurement;
  • Fig. 8 illustrates a compensating procedure for measuring of a crankshaft bearing surface.
  • FIGs. 1 and 2 Two typical examples of measured objects that are current in such applications- are illustrated in Figs. 1 and 2, respectively showing schematically a crankshaft A and a camshaft A. for a four-cylinder automobile engine.
  • the shafts have a center or rotational axis defined in their design which is represented in the finished shaft by a dowel hole c made in each end of the shaft.
  • the invention arises from the desire for a process and an apparatus for accurate, contactless gauging of machine parts with such a complicated geometry as that here described, where the advantages of the invention are greatest as compared with known technique, it is obvious that the invention can also be applied for machine parts with simpler configuration and having a lesser number of finely finished surfaces.
  • the apparatus comprises a frame that is generally designated by 1 and is constructed of steel sections, of which a pair of lengthwise and transversely extending beams 2 and 3, respecti ⁇ vely, are shown at the top of the figure, as well as two inwardly directed brackets 4.
  • brackets on the other longitudinal side of the frame, supported on the lengthwise extending beams 2 and in turn supporting a stiff parallelepiped part 5 forming a downwardly turned horizontal plane 6 with pilot bearing (not shown).
  • the frame 1 further has in its ends located in front of the block 5 two downwardly hanging consoles 7, 8 forming the attach ⁇ ment for two tailstocks 9, 10 located in the lower part of the apparatus.
  • the console 8 also supports a positioning motor 11 which is set up to rotate a feed screw 12 that extends in the _ direction under the plane 6 and the rotational movement of which can be accurately determined with the aid of an optical angle transmitter (e ⁇ corder) 13.
  • the tailstocks 9, 10 are provided in a known manner with opposite mutually displaceable conical dowels 14 of which the dowel that is comprised in the tailstock 9 distinctly appears in Fig. 4.
  • a straight line 15 that connects the tips of the dowels and extends horizontally and parallel to the coordinate direction x. defines the measuring axis of the apparatus which in the present embodiment for engine shafts can have an effective length on the order of 0.5-1 m.
  • Around the measuring axis there is a space that forms a three-dimensional measuring zone 16 that is large enough so that the machine parts to be gauged in the apparatus can be introduced between the dowels and rotated around the measuring axis.
  • a crankshaft A corres ⁇ ponding in principle to Fig.
  • a linear optical transmitter 17 detects the position of the tailstock 9.
  • each tail- stock cooperates with a remotely controlled operating device secured in the consoles 7, 8, suitably a hydraulically damped pneumatic actuating cylinder.
  • a remotely controlled operating device secured in the consoles 7, 8, suitably a hydraulically damped pneumatic actuating cylinder.
  • Such an operating device, designated by 18, can translate the dowel in the tailstock 10 in the forward direction along the line 15, suitably towards and from a prede- ter ined end position.
  • the second tailstock 9 has a similar operating device 19, partly hidden in the drawing, which can move that tailstock in the same directions, and the operating device is suitably so designed that when the tailstock meets the end of a machine part installed in the measuring zone, that part is gripped with a certain axial force that produces a stable engagement between the machine part and the tailstocks.
  • a gauge 20 which, as appears from Fig. 4, comprises two measuring tips 21, each having its segments 22 facing in opposite directions and which project out parallel each from its plate 23 supported on the dowel 14.
  • the plates are mutually biased laterally, and provided that the machine part A has in that end of it a keyway j ⁇ fitting the measuring tips, oriented at a predetermined angular position relative to the measuring axis 15, the gauge 20 with the segment 22 will feel the sides of the keyway during forward movement.
  • a measurement instrumentality 24 which determines the breadth of the spring 25 between the plates, an electrical signal which in part indi- cates the presence of the keyway and in part provides a measure ⁇ ment of its width and its angular position relative to the main bearings of the crankshaft.
  • the same tailstock further comprises a carrier formed with an arm 26 projecting outwardly in the same angulr position as the measuring tips. It is made so that it can get into the keyway ⁇ like a key so that the crankshaft A is thereby nonrotatably coupled to a drive motor connected with the carrier.
  • the second tailstock 10 has a mechanism that will accompany the rotational movement of the crankshaft and comprises a pin 27 that projects out parallel to the dowel 14. It is biased in the axial direction and is so arranged that when rotational move ⁇ ment begins it snaps into one of the holes in a circle of holes in the flange f of the crankshaft.
  • an angle gauge 28 arranged on a prolongation of the measuring line 15 will produce a pulse train representing the turning movement that is processed in a computer.
  • the latter can be zeroed by a signal which is produced when the measurement procedure is started and which represents an initial position of the keyway, for example straight up, so that the contents of the calculator will thereafter continuously denote the existing position of rotation of the crankshaft.
  • a dimension that is essential for the measurement process of the invention is determination of diameters and radii for the vital surfaces of a machine part, exemplified in Fig. 1 by the main bearing surface r and the crank bearing surface r .
  • the apparatus has a measuring device 30 which at its exterior has the form of a yoke that stranddles transversely across the measuring zone 16 and is suspended by a first measur ⁇ ing table 31.
  • the latter is accurately controlled relative to the fixed frame part 5 so that it can be displaced along its plane 6 in the ⁇ direction.
  • the table, and with it the measuring device 30 can be brought to occupy any arbitrary position along the measuring line 15 by means of the positioning motor 11, angle transmitter 13 and a servo circuit.
  • the measuring device is photoelectric and works with laser light that is emitted by a scanning system jhich, in a known manner, can consist of a laser transmitter that emits laser light in the form of a narrow beam, a rotating mirror which deflects the laser beam, and a lens that directs the light parallel and from which the beam 32, as illustrated in Fig. 5, is sent out towards the measuring zone 16 in a plane 33 that extends at right angles to the measuring axis 15.
  • the parts just mentioned are contained in one leg 34 of the measuring device, that left one in Figs. 3 and 5, while in the other leg 35 there is an optical arrangement that directs and focuses tha laser light received from the measuring zone onto a photodetector from which an electric measuring signal is emitted.
  • the system can operate in principle like the apparatus shown in Fig. 1 of our Swedish patent appli- cation 8602110-2.
  • the laser beam 32 that has passed through the lens is caused to be quickly and cyclically translated parallel to itself in the plane 33, each time from an initial position, for example down in the lower part at 36, to a final position 37, and in this the displacement is somewhat greater than the effective height of the measuring zone.
  • the laser beam will scan an object that is in the measuring zone and is intersected by the plane 33.
  • the scanning pattern will be obtained that is illustrated in Fig.
  • the bearing surface blacks out the laser light within a field corresponding to the diameter £ of the surface, or, more precisely expressed: the distance in the direction of translation j of the laser beam that is indicated by the two tangents 38, 29 to the bearing surface.
  • This distance which in principle corresponds to the interval in which the electrical measuring signal from the above mentioned photo ⁇ detector does not appear, is represented by a corresponding rotational angle of the rotating mirror of the laser scanner, and by letting the measuring signal give; rise to an accurate determination of this angle there is obtained a diamter measure ⁇ ment D_ seen in the direction y_.
  • the calcu ⁇ lator unit of the apparatus determines a corresponding measure- ment number, which can be obtained with an accuracy as high as cm. That the measurement is taken in the mentioned direction on the main bearing surface is at the same time recorded with the help of the signal from the angle gauge 28.
  • the scanning system is therefore arranged so that it emits three simultaneous laser beams, each of which sweeps its plane, and with the position of the plane in the x ⁇ direction so selected that it intersects the bearing surface at a repre ⁇ sentative location.
  • those that are compared with the above described scanning plane are designated 33' and 33".
  • the measuring device forms three series of measurement values that issue in parallel channels and are taken at points that are evenly distributed in the axial and peripheral direction over the surface of the inspected part of the crankshaft.
  • the measurement values are space oriented, they can be used for determining whether the surface satisfies the above mentioned criteria.
  • a radially directed surface can be gauged by means of a measuring device 30 in accordance with the preferred embodiment of the invention, to check its roundness, straightness and coni- city, will now be briefly described with reference to Fig. 5 and 7.
  • the latter figure shows the amplitude of the detected measure ⁇ ment signal as a function of the position of the laser beam 32 in the sweep direction y.
  • This is arranged like a knife in the fixed structure of the measuring device 30 so that during measuring its inwardly directed edge transverse to the plane 33 has a constant known position in the coordinate direction _. This occurs because for every time that the beam sweeps over the plane 33 the measuring signal amplitude will have exactly the same y_ value just before the final position 37 is reached, and in an unambiguous manner falls from the value V 1 to the value V_, and this naturally independently of the measured object.
  • the said _ value can therefore be seen as an extremely accurate reference or a fixed point in the plane 33.
  • the signal can not be directly employed for determining a measurement without its first being processed in a circuit that compares the signal with a threshold value V f which is suitably £ (V.. - V vide).
  • V f which is suitably £ (V.. - V vide).
  • the circuit produces a square wave (depicted at the bottom of the diagram) during the time the measuring signal exceeds the threshold value and for every scanning cycle three discrete y_ values are thus obtained which represent points 38-40 in Fig. 7. Out of them the appa ⁇ ratus can now calculate two related, space oriented measurement values
  • the bearing surface can be further checked as to whether it is satisfactorily straight, that is, whether the three points on the surface that in an arbitrary angular position form its generatrix, lie in a straight line, and whether the surface has any conicity, that is, whether the line is inclined in relation to the measuring axis 15.
  • This function is solved by ana ⁇ lyzing in a special calculating program the above mentioned space related measurement numbers and angle measurements, and one can thus also obtain information about the angular position, calculated, for example, from the keyway k_, at which the center of the bearing surface is displaced.
  • Fig. 8 shows in cross-section a main bearing part of a crankshaft A .
  • the shaft rotates in t_ * the direction of the arrow 42, and by reason of this the bearing surface manages to shift a small distance transverse to the laser beam, which is taken to be horizontal, while it sweeps over the bearing surface.
  • This measurement which is obtained from the detector unit, will thus be too large if the beam is assumed to sweep upward and downward, and the calculator unit is there ⁇ fore so programmed that it calculates, from the angular posi ⁇ tions ⁇ .. and C 2 which exist when the laser light is broken off and resumed, respectively, a sum corresponding to ⁇ D and auto- matically corrects the measuring number for by subtracting that sum.
  • a measurement important for main crankshaft bearing surfaces that can also be checked with the measurement values taken with the measuring device 30 is the crank radius R ⁇ , and if that measurement is taken at three axial positions with the use of three parallel beams, according to Fig. 5, inspection can also be made of the main bearing surface or the parallelism of its central axis with the measurement axis 15 or the center £ of the shaft axis.
  • the gauging of the diameter and radius measurements of machine parts is shown coordinated with a checking of axial measurement, in the example of the crankshaft directed to the ring-shaped shoulder surfaces that bound the main bearing and cam bearing surfaces r and r and one of which, designated by a is shown in broken lines in Fig. 8.
  • This gauging is taken care of by a measuring device 44, the operative parts of which are enclosed in a fork-shaped frame 45 opening downward toward the measuring axis 15 on one side of the measuring device 30.
  • the axial measuring device In its upper portion the axial measuring device is united with a second measuring table 46 which is suspended beside the first measuring table 31 and is moveable in the x ⁇ direction in two alternative ways, one involving its being locked relative to the table 31 for following along with it during positioning of the measuring device 30, while in the second alternative an indepen ⁇ dent movement in the x_ direction can be carried out relative to the first table 31.
  • This relative movement which can take place only in a zone bounded by the table 31 and is produced by a second positioning motor 47, has for its function to permit the axial measuring device 44, after the table 31 and the measur ⁇ ing device 30 have come into a suitable position for diameter measuring, to alone carry out the movements which, in dependence upon the design of the machine part, are necessary for being able to gauge the axial surfaces . In this way time is saved and it is only the smaller and lighter axial measuring device that needs to be moved for the last mentioned gauging moment.
  • the relative motion is measured by a linear transmitter 48 or the like.
  • the axial measuring device is also adjustable in the y_ direction by means of the second measuring table 46, which goes in that direction and is enclosed in at third measuring table 49 inte ⁇ grated with the frame 45.
  • the movement in the vertical direction is obtained from a third positioning motor 50 and one of the driven screws 51 and the movement is measured by an angle en ⁇ coder 52.
  • the frame 45 has in two box-shaped housings 53, 54, seen in Fig. 3 on the farther and nearer sides, respectively, of the measuring zone, two systems of light sources 56, 57 and, cooperating with them, light detectors 55 and 58, respectively, working in oblique ray paths across the measuring zone that are mirror-imaged relative to one another.
  • the light from the light sources which is preferably infrared, is emitted from openings 59, 60 so that it is focused at two axially distinct points that can be sup- posed to be located in the middle of the measuring zone, like the point P_ in Fig. 8, and towards which the light detectors are also focused.
  • the arrangement is best seen in Fig.
  • FIG. 6 which illustrates the optical function when length measurement is taken between two opposite shoulder surfaces a,, and ⁇ réelle .
  • the focal point P 1 for the system 57, 55 is, as shown, located to the right along the measuring axis 15, and the point P_ for the other system to the left, nearer the keyway end.
  • the axial measuring device is so preadjusted that the light from the light source 57 will be able to meet the shoulder surface a 1 that is turned toward it in the figure, and at the same vertical position of the measuring device the light from the other light source 56 will be able to meet the shoulder surface a n facing forward in the figure.
  • an apparatus according to the invention in the embodiment here described, is installed at the end of a production line on which finished crankshafts or similar machine parts are transported towards the apparatus in close succession on a band.
  • the apparatus has its measuring axis 15 oriented above the transport band and parallel with the centerline £ for a crankshaft that comes along in a waiting position under the appa- ratus and which waits its turn to be gauged.
  • the procedure begins with said crankshaft being brought up by a lifter 61 into the measuring zone, where it is briefly held by the lifter while it is fixed between the dowels 14.
  • the driver motor is started and the angle gauge 28 has entered into function, gauging can begin.
  • the two measuring devices 30 and 44 are at the one end of the measuring axis 15, for example the right one in Fig. 3.
  • the measuring device 30 is now positioned in a position selected according to the design right under the main bearing surface r located nearest the end of the crankshaft, after which it is inspected, which is carried out while the shaft is rotated one revolution.
  • the measuring device is now moved in the x_ direc ⁇ tion to a new position suitable for the first crank bearing surface r .
  • the axial measuring device 44 now carries out the relative movements in the __ direction and the jx direction that make possible the determination of the position of the first axially directed surface , which can be regarded as facing toward the end of the crankshaft, like the surface a_ in Fig. 6.
  • the measur- * ing device thus continues, in a constrained, preprogrammed move ⁇ ment scheme, to gauge surface after surface on the crankshaft all while it is rotated.
  • the measuring device When all ot the surfaces have been gauged, the measuring device returns to its initial position, a remover (not shown), which is located behind the lifter 61 in the transporting direction, now goes up under the crankshaft and takes it away when the dowels 14 spread apart, after which the released crankshaft is placed upon the transport band. At the same time the lifter has again stepped into function to bring up a new crankshaft in the posi ⁇ tion for gauging. The whole procedure takes only about half a minute.
  • the measuring device 44 does not perform any function. In such circumstances it is therefore possible to simplify the process and the apparatus according to the inven ⁇ tion as compared with the herein described embodiment.

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

Abstract

Un procédé et un appareil, permettant le calibrage précis et sans contact de parties mécaniques telles que des vilebrequins (Av) et autres utilisent un calibrage photoélectrique des surfaces de support et des autres surfaces finement finies. Après insertion d'une partie mécanique dans un cadre, les surfaces dirigées radialement de la partie mécanique sont balayées par un dispositif de balayage à laser contenu dans un dispositif de mesurage (30) pouvant être déplacé axialement et fonctionnant sur un plan s'étendant radialement (33), la position des surfaces dirigées axialement de la partie mécanique étant ensuite déterminée par un dispositif de mesurage (44) pouvant être déplacé à la fois axialement (x) et radialement (y). Durant le mesurage, la partie mécanique peut tourner et sa position de rotation est déterminée par un calibre d'angle (28).
PCT/SE1987/000230 1986-05-09 1987-05-07 Procede et appareil permettant le calibrage precis et sans contact de parties mecaniques Ceased WO1987007007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8602109A SE453223B (sv) 1986-05-09 1986-05-09 Forfaringssett och apparat for beroringsfri och noggrann kontrollmetning av maskindelar
SE8602109-4 1986-05-09

Publications (1)

Publication Number Publication Date
WO1987007007A1 true WO1987007007A1 (fr) 1987-11-19

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ID=20364466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000230 Ceased WO1987007007A1 (fr) 1986-05-09 1987-05-07 Procede et appareil permettant le calibrage precis et sans contact de parties mecaniques

Country Status (5)

Country Link
EP (1) EP0309454A1 (fr)
JP (1) JPH01502358A (fr)
AU (1) AU7392687A (fr)
SE (1) SE453223B (fr)
WO (1) WO1987007007A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212923A (en) * 1987-11-30 1989-08-02 Nat Res Dev Methods and apparatus for measuring transverse dimensions of workpieces
WO1993010420A1 (fr) * 1991-11-12 1993-05-27 Marposs Societa' Per Azioni Appareil et procede de controle des caracteristiques d'un arbre a cames
EP0686829A2 (fr) 1994-06-09 1995-12-13 Zeiss Messgerätebau GmbH Appareil de mesure pour le contrÔle des dimensions de pièces cylindriques
WO1999024785A1 (fr) * 1997-11-07 1999-05-20 Marposs Societa' Per Azioni Dispositif optoelectronique servant a verifier la dimension et/ou la forme de pieces presentant une forme tridimensionnelle complexe
IT201800011031A1 (it) * 2018-12-12 2020-06-12 Visiorobotics S R L Sistema di validazione di componenti meccanici
CN115507780A (zh) * 2022-10-24 2022-12-23 东营市三和石油装备有限公司 一种抽油杆端部直线度智能检测设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7777900B2 (en) * 2007-10-23 2010-08-17 Gii Acquisition, Llc Method and system for optically inspecting parts
CN111721179A (zh) * 2020-06-18 2020-09-29 瓦房店轴承集团国家轴承工程技术研究中心有限公司 通用型深沟球轴承沟道位置检测装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025796A (en) * 1974-07-19 1977-05-24 Erwin Sick Optik-Elektronik Photoelectric instrument for measuring the length of an object
US4417147A (en) * 1981-02-27 1983-11-22 The Boeing Company Method and apparatus for measuring runout in a cylindrical object
WO1983004303A1 (fr) * 1982-05-28 1983-12-08 Harald Kleinhuber Appareil de mesure des dimensions d'objets cylindriques a l'aide d'un rayon laser de balayage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025796A (en) * 1974-07-19 1977-05-24 Erwin Sick Optik-Elektronik Photoelectric instrument for measuring the length of an object
US4417147A (en) * 1981-02-27 1983-11-22 The Boeing Company Method and apparatus for measuring runout in a cylindrical object
WO1983004303A1 (fr) * 1982-05-28 1983-12-08 Harald Kleinhuber Appareil de mesure des dimensions d'objets cylindriques a l'aide d'un rayon laser de balayage

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212923A (en) * 1987-11-30 1989-08-02 Nat Res Dev Methods and apparatus for measuring transverse dimensions of workpieces
US4964071A (en) * 1987-11-30 1990-10-16 National Research Development Corporation Methods and apparatus for measuring transverse dimensions of workpieces
GB2212923B (en) * 1987-11-30 1991-05-01 Nat Res Dev Measuring transverse dimensions of workpieces
WO1993010420A1 (fr) * 1991-11-12 1993-05-27 Marposs Societa' Per Azioni Appareil et procede de controle des caracteristiques d'un arbre a cames
EP0686829A2 (fr) 1994-06-09 1995-12-13 Zeiss Messgerätebau GmbH Appareil de mesure pour le contrÔle des dimensions de pièces cylindriques
US5542188A (en) * 1994-06-09 1996-08-06 Zeiss Messgeratebau GmbH Measuring apparatus for checking the dimensions of cylindrical workpieces
US6425188B1 (en) 1997-07-11 2002-07-30 Marposs Societa' Per Azioni Optoelectric apparatus for the dimension and/or shape checking of pieces with complex tridimensional shape
WO1999024785A1 (fr) * 1997-11-07 1999-05-20 Marposs Societa' Per Azioni Dispositif optoelectronique servant a verifier la dimension et/ou la forme de pieces presentant une forme tridimensionnelle complexe
IT201800011031A1 (it) * 2018-12-12 2020-06-12 Visiorobotics S R L Sistema di validazione di componenti meccanici
CN115507780A (zh) * 2022-10-24 2022-12-23 东营市三和石油装备有限公司 一种抽油杆端部直线度智能检测设备

Also Published As

Publication number Publication date
JPH01502358A (ja) 1989-08-17
SE453223B (sv) 1988-01-18
EP0309454A1 (fr) 1989-04-05
AU7392687A (en) 1987-12-01
SE8602109D0 (sv) 1986-05-09
SE8602109L (sv) 1987-11-10

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