EP0938642A1 - Systeme de mesure de palier - Google Patents

Systeme de mesure de palier

Info

Publication number
EP0938642A1
EP0938642A1 EP97939047A EP97939047A EP0938642A1 EP 0938642 A1 EP0938642 A1 EP 0938642A1 EP 97939047 A EP97939047 A EP 97939047A EP 97939047 A EP97939047 A EP 97939047A EP 0938642 A1 EP0938642 A1 EP 0938642A1
Authority
EP
European Patent Office
Prior art keywords
shaft
measurements
sensing means
assembly
turntable
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Withdrawn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
EP97939047A
Other languages
German (de)
English (en)
Inventor
Peter Dean Onyon
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.)
Taylor Hobson Ltd
Original Assignee
Taylor Hobson Ltd
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 Taylor Hobson Ltd filed Critical Taylor Hobson Ltd
Publication of EP0938642A1 publication Critical patent/EP0938642A1/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Withdrawn legal-status Critical Current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
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B7/31—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B7/31—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G01B7/312—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes

Definitions

  • This invention relates to apparatuses and methods for making measurements on a component assembly comprising a drum rotatably mounted to a shaft via a bearing.
  • this invention relates to the use of surface form or profile measuring instruments in measurements of a bearing of a video drum assembly.
  • Apparatus such as the Applicant's commercially available Talyrond 300 range of equipment is known for the measurement of the form or profile of a surface of a component.
  • a stylus carried at one end of a support arm is mounted so as to be pivotable about a pivot axis which allows the stylus to follow the profile of a surface of the component during relative movement between the stylus and the surface.
  • a method of achieving suitable relative movement is by rotating the component. This can be achieved by securing it to a rotatable turntable.
  • the displacement of the stylus as it follows the profile of the surface is measured and provides a measurement of relative surface profile, i.e. it shows the relative position of each point on the surface with respect to other points on the surface.
  • the support arm which carries the stylus is preferably movable in a direction along the axis of rotation of the turntable so as to allow a plurality of sets of measurements to be taken at different heights from the turntable for each component . It is often desirable, for quality control reasons, to be able to obtain an indication of the accuracy of a bearing.
  • a video drum assembly A typical video drum assembly is shown in Figure 1.
  • the assembly comprises a drum 3 having a central cylindrical portion or collar 3d from which extends a flange 3e carrying at its periphery a drum surface 3 ' .
  • the collar 3d of the drum 3 is rotatably mounted on a shaft 1 via a shaft bearing (not shown in Figure 1).
  • the drum surface 3' has top and bottom datum faces 3b and 3c.
  • the shaft bearing is typically of a ball race type.
  • a record head drum 5, carrying a record head 7 is mounted to the shaft 1 of the video drum assembly such that the record head drum 5 rotates with shaft 1. This allows rotation of the record head drum 5 and thus the record head 7 with respect to drum 3.
  • a helical guide path or lead line 3a which, in use of the video drum assembly, guides a video tape such that the tape passes the record head at the correct angle to achieve the desired tape scanning pattern. Inaccuracies in the bearing between the shaft 1 and the drum 3 may result in the record head 7 not following the required path across the tape and thus may detrimentally affect the quality of both recording and subsequent playback of the tape .
  • One current practised approach to measuring the accuracy of video drum bearings is to use a lead line form measuring instrument.
  • two releasable clamps are carried by X-Y movements mounted externally to the rotatable turntable.
  • a dummy shaft is then clamped between these two clamps.
  • Two gauges are mounted to the turntable at different heights above it.
  • the axis of the dummy shaft may be aligned with the rotational axis or spindle of the turntable.
  • the clamps are thereafter released and the dummy shaft removed and replaced by a video drum assembly to be measured.
  • the shaft of the video drum assembly is then clamped in position by the two clamps . This ensures that the shaft is aligned with the turntable axis .
  • the form of the lead line of the drum is then measured by causing the stylus of the form measuring instrument to follow the lead line in a conventional manner.
  • a pin which engages with the video drum is attached to the turntable in such a manner as to cause the rotational movement of the turntable to be transmitted to the video drum.
  • the measurements obtained indicate the path which will be followed in practice by the tape and are indicative not only of the form of the lead line but additionally of any errors of the bearings between the shaft and the drum.
  • a problem with the above described method is that it is not, however, possible to isolate the different sources of error.
  • errors in the form of the lead line cannot be isolated from the bearing errors.
  • considerable skill is required of an operator in the manipulation and alignment of the two clamps with the dummy shaft and the replacing the dummy shaft with the shaft of the video drum assembly.
  • a method according to the invention involves taking two sets of measurement readings, only one set of which includes the errors introduced by the bearing.
  • the present invention provides a method of making measurements on a component assembly having a body rotatable about a shaft wherein the form and/or movement of a surface of the assembly is sensed when there is no or a first degree of relative rotation between the body and the shaft and the form and/or movement of a surface, possibly the same surface, is sensed when there is relative rotation or a second degree of relative rotation between the shaft and the body.
  • the present invention provides an apparatus for making measurements on a component assembly having a body rotatable about a shaft, which apparatus comprises means for sensing the form and/or movement of a surface of the assembly when there is no or a first degree of relative rotation between the body and the shaft and means for sensing the form and/or movement of a surface, possibly the same surface, when there is relative rotation or a second degree of relative rotation between the shaft and the body.
  • One embodiment of the invention provides a method of measuring bearing irregularity in a bearing assembly, said assembly comprising a body rotatable around a shaft, the method comprising the steps of: providing a surface form measuring instrument of the type in which the assembly to be measured is positioned on a rotatable turntable and a stylus is arranged so as to give an indication of a surface feature around said assembly; clamping one of said body or said shaft of said assembly onto said turntable; making a first measurement of a surface during which no relative movement of the drum to the shaft occurs; making a second measurement indicative of surface movement during which rotation of the measured part of the assembly is prevented and the other part rotates.
  • bearing alignment measurements can be provided by calculating the difference between said first and second measurement.
  • said step of making a second measurement of roundness during which rotation of one part of the assembly is prevented and the other rotates comprises an initial step of moving a stop into contact with the part of the assembly not clamped to the turntable.
  • Figure 1 is a simplified diagram of a video drum assembly and associated record head drum
  • Figure 2 is a diagrammatic simplified side view of apparatus according to a first embodiment of the present invention
  • Figure 3 is a block diagram illustrating processing means of an embodiment of apparatus according to the present invention.
  • Figure 4 is a diagrammatic perspective view of part of the apparatus shown in Figure 2 together with the video drum assembly of Figure 1, for explaining a first embodiment of a method according to the present invention
  • Figure 5 is a diagrammatic perspective view of part of an alternative apparatus to that shown in Figure 4 together with the video drum assembly of Figure 1, also suitable for use in a first embodiment of a method according to the present invention
  • Figure 6 is a diagrammatic perspective view of a part of alternative apparatus to that shown in Figure 2;
  • Figures 7a, 7b and 7c are schematic diagrams for explaining the first embodiment of a method according to the present invention.
  • Figures 8a, 8b and 8c are schematic diagrams for explaining a second embodiment of a method according to the present invention.
  • Figure 9 is a schematic diagram for explaining a third embodiment of a method according to the present invention.
  • Figure 10 is a schematic diagram illustrating a modified version of the third embodiment of the present invention.
  • Figure 11 shows sample output representing the flatness of the drum datum face produced by an apparatus or method according to the present invention
  • Figure 12 shows sample output displaying parallelism of the rotating axis relative to the drum datum face produced by an apparatus or method according to the present invention
  • Figure 13 shows sample output displaying the flatness of the rotating axis relative to the drum datum face, the output being produced by an apparatus or method according to the present invention.
  • Figure 2 shows very schematically a metrological instrument for the measurement of surface form or profile.
  • a workbench or surface 12 mounted upon a workbench or surface 12 is a turntable 14 for supporting the component 26 to be measured.
  • the workbench 12 lies in an r- ⁇ plane, the origin of which lies on the axis of rotation of the turntable 14.
  • the turntable 14 is preferably supported on a high accuracy air bearing spindle (not shown) as described in published patent application GB 2178805 the whole contents of which are incorporated herein by reference.
  • a support column 24 which carries a carriage 18 movable along the support column 24 in a Z direction.
  • a support arm assembly 20 is mounted to the carriage 18.
  • a free end of the support arm assembly 20 carries stylus 22 having a tip 22a which is arranged to contact a surface of the component 26.
  • the stylus tip 22a will have a radius in the range 1mm to 4mm.
  • an inductive means such as a LVDT (linear variable differential transducer) or by use of an interferometric system.
  • the metrological instrument as described thus far is based on, for example, the Talyrond 300 manufactured by the Applicant.
  • the component 26 to be measured may be a video drum assembly such as that shown in Figure 1. This is positioned on the turntable 14 and either the shaft 1 or, as in the arrangement shown, the drum collar 3d is fixed securely to the turntable 14 by means such as a chuck, clamp or vice 16 mounted at the spindle axis by means of, for example, a well known screwthread mounting (not shown) .
  • the clamp may be an integral part of the turntable *
  • the rotational axis (Z axis) of the component is aligned with the rotational axis of the turntable using appropriate known techniques, for example, as discussed in published patent application EP 0240150, the whole contents of which are herein incorporated by reference.
  • initial alignment of the axis of the component 26 and the turntable 14 is preferable, it is possible to compensate for inexact alignment during processing of the measurement data.
  • the stylus 22, support arm assembly 20 and carriage 18 are preferably adapted such that the stylus 22 may be used for taking measurements of the body of the component or may be moved up or down so as to take measurements of the top and/or bottom surfaces of the component.
  • the apparatus In arranging the apparatus such that measurements can be taken at the top and/or bottom surfaces it may be necessary to reverse the orientation of the stylus 22 and support arm assembly 20 in relation to the carriage 18.
  • a dual directional biased stylus such as provided in the Talymin 4 stylus set widely commercially available from the Applicant can be used.
  • the apparatus embodying the invention shown in Figure 2 is further provided with a second support column 30 also provided with a carriage 32 moveable in the Z direction.
  • the carriage 32 carries a support arm assembly 34 which carries stop 36 which cooperates with a bar 38 mounted in use of the apparatus to the shaft 1 for reasons which will be explained later. It will be appreciated that as an alternative to the above a single support column could carry both stylus 22 and stop 36.
  • FIG. 3 illustrates processing means suitable for use in apparatus according to the present invention.
  • the operation of the instrument is controlled by processor 50, having read only memory (ROM) 52 and random access memory (RAM) 54 and a fixed or removable data storage device such as a hard disk or rotatable optical disk drive 55.
  • ROM read only memory
  • RAM random access memory
  • a series of instructions for automatic control of the measuring instrument may be stored in ROM 52 although alternatively these instructions could be stored in a part of the RAM 54 and loaded thereto from the fixed or removable storage medium 55.
  • the use of processor 50 may also allow processing to be conducted in order to correct any inexact alignment of the axis of the shaft with respect to the axis of turntable rotation, for example in the manner described in published patent application GB 2294327.
  • the RAM 54 or disc drive 55 may be used for storage of measurements made by the instrument. Also provided are a visual display unit (VDU) 56 to facilitate user interface and to allow display of the results; keyboard 58 and pointing device 60 to allow user input and printer 68.
  • VDU visual display unit
  • Input to the processor 50 is provided by three transducers 62, 64, 66 connected to the carriage 18, stylus 22 and turntable 14. The combination of signals provided by these transducers provides the necessary indication of the stylus position. Additional transducers (not shown) may also be provided to monitor the position of the stop 30.
  • FIG 4 shows the video drum assembly to be measured and its association with the flat faced bar 38 and stop 36.
  • the flat faced bar 38 is attached to the shaft 1. The attachment must be such that the flat faced bar 38 does not rotate with respect to the shaft 1.
  • the flat face bar 38 preferably extends both sides of the shaft in a direction perpendicular to the shaft so that the shaft 1 is not unbalanced.
  • One end of the flat face- bar 38 is formed with thinned section defining a surface 40 for receiving the stylus tip 22a (not shown in Figure 4) of the measuring instrument.
  • This stylus receiving surface 40 is preferably a distance from the shaft axis approximately equal to the distance of the drum face 3c from the shaft axis.
  • the other end of the flat faced bar 42 is formed plane or otherwise adapted such that rotation can be prevented by means of the stop 36 as will be explained later.
  • the flat face bar is attached by a grub screw (not shown) although the attachment could be made by any suitable means .
  • the flat face bar 38 is formed with a recess 38a towards its centre which receives the shaft 1.
  • a location spring 41 secured to the flat face bar which frictionally engages the shaft 1 in order to retain the shaft in the recess.
  • the location spring 41 is preferably formed on its inner side (not visible in the Figure) with a semi-resilient pad to facilitate centring and to avoid metal-on-metal contact.
  • the flat face bar 38 is also formed with a cap plate 39 (shown dotted in Figure 5) such that the bar 38 is suitably located on the shaft 1 above the shaft housing portion 3d of the drum 3.
  • a ball 35 (shown dotted) may additionally be provided to enable said location.
  • FIG 5 an alternative arrangement of the stop is used compared to that shown in Figure 4.
  • the flat face bar 38 is provided with a radially extending part or stop pin 33 at the stylus receiving end.
  • the stop pin 33 engages with stop bar 36 rather than there being direct engagement between the stop bar 36 and the unformed end of the flat faced bar 42.
  • FIGS 7a to 7c are schematic cross-sections on an enlarged scale of a part of the apparatus showing the video drum assembly mounted on the turntable 14 and with the bar 38 fixed in place during various stages of a method embodying the invention.
  • bearings 10 of the bearing assembly between the shaft 1 and the drum collar 3d can be seen.
  • the drum 3 is secured to the turntable 14 by the clamp or chuck 16.
  • the clamp 16 is fixed to the turntable 14 and may either be a separate or an integral part of the turntable 14.
  • the fixture arrangement is such, however, that movement of the shaft 1 is not prevented.
  • the stop 36 is lowered or otherwise moved into engagement with the plane end 42 of the flat face bar 38. Such engagement prevents the rotation of the flat faced bar 38 and thus the shaft 1 when the turntable 14 and thus the drum 3 is rotated.
  • the stylus tip 22a is then brought into contact with the stylus receiving portion 40 of the flat face bar 38 in conventional manner in a direction as shown by arrow A.
  • the turntable 14 is then revolved through one revolution during which the stylus tip 22a follows the displacements of the surface 40.
  • the displacement of the stylus 22 is measured by the stylus transducer 64 and together with readings from the carriage transducer 62 and turntable transducer 66 is logged by the processing means during the revolution so that a first set of measurements of the displacement of the stylus 22 is obtained.
  • a second set of measurements is thereafter taken in a manner which will be described with reference to Figure 7b.
  • the stop 36 is preferably removed from contact with the flat face bar 38.
  • the position of the stylus 22 is adjusted by means of the carriage 18 so that the stylus tip 22a contacts drum datum face 3b as shown by the arrow B.
  • this may require manual repositioning of the stylus to enable it to contact the drum datum face 3b.
  • a second set of readings or measurements of the displacement of the stylus 22 as it follows the datum face 3b are logged by the processing means for one revolution of the turntable 14 and thus of the drum datum face 3b.
  • the results thus obtained are a first set of measurements which include the errors associated with the bearings and a second set of datum measurements, being those taken directly from the drum.
  • the processor is arranged to determine the difference between the two set to provide an indication of the errors in the bearing, being that which it is desired to measure.
  • the first and second sets of measurements and, optionally, the difference values are stored by the processing means, for example in the disc drive 55 and may, if required, be displayed by the VDU 56 and/or printed out by printer 68 and/or transferred via a remote link to another processing means or storage device.
  • drum datum face 3b it is preferable to take the second set of readings with reference to drum datum face 3b as the typical shape of a video drum assembly means that good contact can be made between this edge and the tip of the stylus 22a. Also this avoids having to move the bar 38 after the first set of measurements.
  • Figure 11 shows a typical display of the flatness of the drum datum face 3b or 3c, that is to say the second set of measurements.
  • the circular drum is shown projected as an oval, angles around the oval corresponding to angles around the drum.
  • the flatness of each point around the drum is represented by the length of the vertical lines.
  • the flatness can be directly calculated from the displacement of the stylus 22 during the second measurement set described above, being that in which the stylus 22 is in direct contact with the drum datum face.
  • certain additional statistical information This includes the radius (R), the runout (in this case 31.2 ⁇ m) and the flatness (in this case O.lO ⁇ m).
  • the flatness value is essentially the minimum distance between two planes, both of which are parallel to a best fit plane, the two planes totally enclosing the measured profile data.
  • the best fit plane is preferably calculated as the plane in which the least square errors of the profile data is at a minimum, although other ways in which the best fit plane could be calculated will be apparent to those , in the art .
  • the flatness angle (in this case 288.1 degrees) relates to the direction of the maximum "uphill" gradient of the best fit plane and is the angle ⁇ subtended by that gradient direction on the r- ⁇ plane of the turntable 14 relative to a reference zero.
  • the gradient is measured with respect to a plane perpendicular to the Z axis which in this case is the plane in which the spindle axis lies.
  • the display also shows the squareness of the drum datum face (in this case 31.15 ⁇ ) and the squareness angle.
  • the squareness value relates to the minimum distance between two planes which are perpendicular to a defined reference axis (in this case the spindle axis) and which totally enclose the measured profile data. It will be appreciated that this value differs from the flatness value in that the two parallel planes enclosing the measured profile data must lie perpendicular to a defined axis, rather than being related to a best fit plane of the profile values.
  • the squareness angle (shown below the squareness value) is the angle subtended on the turntable r- ⁇ plane, relative to the reference zero, of the direction of the maximum "uphill" gradient of the measured data best fit plane and is measured relative to a defined reference axis.
  • the defined reference axis is the spindle axis
  • the squareness angle is the same as the flatness angle.
  • Figure 12 shows a typical display of the perpendicularity or squareness of the rotating axis relative to the drum datum face. The display is arranged in the same manner as that of Figure 11 above. The set of measurements taken when relative movement between the drum and the shaft occurs, are shown displayed in this figure with reference to (i.e.
  • Parallelism is a similar (but not identical) measurement to squareness and relates to the minimum distance between two planes which are parallel to a defined reference plane and which totally enclose the measured profile values.
  • parallelism is calculated with reference to a reference plane whereas squareness is calculated with reference to a reference axis .
  • the parallelism angle (shown below the parallelism value) of 50.1° is displayed which is the angle subtended on the turntable r- ⁇ plane of the direction of the maximum "uphill" gradient of the measured data best fit plane relative to the defined reference plane.
  • the defined reference plane is the best fit plane of the drum datum face.
  • Figure 13 shows a typical display of the deviations from a best fit flatness plane of the rotating axis.
  • the figure also shows additional statistical information relative to the drum datum face.
  • the set of measurements taken when relative movement between the drum and the shaft occurs are shown displayed in this figure and any lack of parallelism or squareness is ignored. In other words, the display is only concerned with the measurements set where relative movement occurs and relates, therefore, to bearing irregularities only.
  • the statistical information is the same as that shown in Figure 12 and is calculated in the same manner.
  • FIG. 8a and 8b A second embodiment of a method according to the present invention will now be described with reference to Figures 8a and 8b.
  • the arrangement of the video drum assembly during measurement differs in that the clamp or vice 16 is adapted so as to allow the mounting of the drum 3 in an upside-down position in comparison with the first embodiment.
  • a flat faced bar 38 is attached to the shaft 1 in such manner that no significant relative movement between the two occurs .
  • a first set of measurements is then taken as shown in Figure 8a with the flat face bar 38 stopped by the stop 36 and the stylus tip 22a pointing in the direction indicated by the arrow A to follow movement of the surface 40 caused by the bearing as the drum rotates relative to the shaft. Again in this first set of measurements the drum 3 will rotate with the turntable 14 and the shaft 1 will remain stationary.
  • a second set of readings is thereafter taken with, as shown in Figure 8b, the stylus 22 arranged to take readings in the direction indicated by the arrow B, i.e. with the stylus tip 22a in contact with the datum edge of the drum 3c.
  • Figure 9 shows a view similar to Figure 7a of an alternative arrangement in which the clamp 16 is adapted to hold the shaft 1 and not the drum collar 3d. In this manner, the flat faced bar used in the first and second embodiments is unnecessary.
  • the stylus tip 22a is positioned so as to take measurements in the direction of the arrow C in the figure so that the stylus tip 22a is in contact with drum datum face 3b.
  • a pin is employed to contact a hole which is conventionally formed in the flange of the drum 3e so as to prevent drum rotation when the turntable 14 rotates.
  • This pin 40 may be, as shown schematically in Figure 9, mounted to the arm 34 in place of the stop 36. This will thus result in relative movement between the drum 3 and the shaft 1 upon the shaft 1 being rotated by the turntable 14 of the measuring instrument.
  • the stop 36 is removed.
  • a second set of measurements is thereafter taken in which, due to the friction of the bearings and the slow speed at which the turntable 14 is rotated, the drum 3 rotates along with the shaft 1.
  • the stylus tip 22a can be positioned on the upper face 3c of the drum 3.
  • Figure 10 shows a modified version of the method illustrated by Figure 9.
  • the shaft 1 is clamped in such a manner that the drum 3 is in the upside-down position when compared to that shown in Figure 9.
  • the stylus 22 is positioned in the position shown by the arrow D, so that the stylus tip 22a is in contact with drum datum face 3b.
  • the stylus could be positioned on the underside of the drum against datum face 3c. In both cases, readings are taken in the same manner as that described above in relation to the third embodiment .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

La présente invention décrit des appareils et des procédés de prise de mesures d'une irrégularité de palier et/ou d'un défaut d'alignement d'un ensemble composant constitué d'un corps monté rotatif sur une tige par l'intermédiaire d'un palier. L'ensemble à mesurer (26) est monté sur un plateau tournant (14) au moyen d'un mandrin classique (16). Deux ensembles de mesures de profil de surface sont pris, le plateau tournant effectuant une rotation de 360° pour chaque ensemble de mesures. Pour le premier ensemble de mesures, une barre (38) à face plate est attachée à l'axe (1). On empêche la barre (38) à face plate de suivre la rotation du plateau tournant (14) par une butée (36) montée sur un ensemble butée (30, 32, 34). Des mesures de la déviation d'une extrémité de la barre (38) à face plate sont prises au moyen d'une pointe classique (22) montée sur un ensemble pointe (20, 18, 24). Un second ensemble de mesures est pris sans la barre (28) à face plate. Dans cet ensemble de mesures, la pointe suit directement une face de référence du corps, telle que la face supérieure ou inférieure (3c, 3b). A partir des deux ensembles de mesures, on peut calculer, analyser et afficher un nombre de résultats concernant la planéité, la quadrature et le parallélisme d'une face du corps par rapport à l'axe de rotation.
EP97939047A 1996-09-20 1997-09-05 Systeme de mesure de palier Withdrawn EP0938642A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9619704 1996-09-20
GB9619704A GB2317453B (en) 1996-09-20 1996-09-20 Bearing measurement system
PCT/GB1997/002393 WO1998012497A1 (fr) 1996-09-20 1997-09-05 Systeme de mesure de palier

Publications (1)

Publication Number Publication Date
EP0938642A1 true EP0938642A1 (fr) 1999-09-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97939047A Withdrawn EP0938642A1 (fr) 1996-09-20 1997-09-05 Systeme de mesure de palier

Country Status (3)

Country Link
EP (1) EP0938642A1 (fr)
GB (1) GB2317453B (fr)
WO (1) WO1998012497A1 (fr)

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Publication number Priority date Publication date Assignee Title
GB2343515B (en) * 1998-11-06 2002-01-09 Alstom Gas Turbines Ltd Method of and test rig for checking the fit of radial tooth couplings
JP4582446B2 (ja) 2004-11-18 2010-11-17 株式会社東京精密 測定装置
DE102015203698A1 (de) * 2015-03-02 2016-09-08 Carl Zeiss Industrielle Messtechnik Gmbh Anordnung zur Ermittlung eines Bewegungsfehlers einer Drehvorrichtung
CN110455145B (zh) * 2019-08-06 2021-03-02 新昌县普佑机电科技有限公司 一种轴承检测装置

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IT1120819B (it) * 1979-09-14 1986-03-26 Finike Italiana Marposs Apparecchiatura per il controllo dimensionale di una pista di roto lamento di un anello di un cusci netto
DE3123489A1 (de) * 1981-06-13 1982-12-30 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Verfahren zur messung der rundheitsabweichungen von rotationskoerpern und einrichtungen zur durchfuehrung des verfahrens
JPS612009A (ja) * 1984-06-15 1986-01-08 Toshiba Corp 直線性評価装置
US4622751A (en) * 1985-07-16 1986-11-18 Berg John W Precision electromechanical measuring device
US5365458A (en) * 1991-03-29 1994-11-15 Nippon Densan Corporation Motor eccentricity measuring apparatus
GB2307988A (en) * 1995-12-07 1997-06-11 Rank Taylor Hobson Ltd Surface form measurement

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Title
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Also Published As

Publication number Publication date
WO1998012497A1 (fr) 1998-03-26
GB2317453B (en) 2000-12-06
GB9619704D0 (en) 1996-11-06
GB2317453A (en) 1998-03-25

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