DE102011054932B4 - Coordinate measuring machine - Google Patents

Coordinate measuring machine

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Publication number
DE102011054932B4
DE102011054932B4 DE201110054932 DE102011054932A DE102011054932B4 DE 102011054932 B4 DE102011054932 B4 DE 102011054932B4 DE 201110054932 DE201110054932 DE 201110054932 DE 102011054932 A DE102011054932 A DE 102011054932A DE 102011054932 B4 DE102011054932 B4 DE 102011054932B4
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Germany
Prior art keywords
component
arm
axis
rotation
measuring machine
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DE201110054932
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German (de)
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DE102011054932A1 (en
Inventor
Georg Mies
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.)
Klingelnberg GmbH
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Klingelnberg GmbH
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Priority to DE201110054932 priority Critical patent/DE102011054932B4/en
Publication of DE102011054932A1 publication Critical patent/DE102011054932A1/en
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Publication of DE102011054932B4 publication Critical patent/DE102011054932B4/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/004Measuring arrangements characterised by the use of mechanical means for measuring coordinates of points
    • G01B5/008Measuring arrangements characterised by the use of mechanical means for measuring coordinates of points using coordinate measuring machines

Abstract

Described and illustrated is a coordinate measuring machine (10) with a relative to a component to be measured (12) movable sensor (30). A movable first component (16) carries the sensor (30) and is movably guided on a movable second component (20) in a linear axis (z). The second component (20) is designed as an articulated arm (22) which is rotatably mounted about a first axis of rotation (26) at a first end (22a) with a first pivot joint (24) attached to a support structure (14). The articulated arm (22) carries the first component (16) at a second, opposite end (22b). Between the two ends (22a, 22b), the articulated arm (22) has a second pivot (34) with a second axis of rotation (36) parallel to the first axis of rotation (26), forming the articulated arm (22) into a first and a second pivot Arm (31, 32) divided, which are independently rotatable about the first and second rotational axis (26, 36). The articulated arm (22) and the one linearly movable component (16) replace the three linearly guided components required in a conventional gantry-type coordinate measuring machine with a stationary gantry. This increases measurement accuracy because it causes much fewer errors than extended linear guides.

Description

  • The invention relates to a coordinate measuring machine according to the preamble of patent claim 1.
  • A gantry-type coordinate measuring machine with stationary gantry is described, for example, in EN ISO 10360-1, November 2000 + Annex AC, December 2002, Section A.5 of the Annex and shown in Figure A.5. This known coordinate measuring machine has three movable components, which move on three mutually perpendicular guides or linear axes. The known coordinate measuring machine in gantry design with three linear axes has the advantage that thus non-round or, more generally, non-rotationally symmetrical components can be measured in a Cartesian coordinate system. A gauge system, or more generally a sensor, is located on the first component, which is perpendicular to the second. The connected assembly of the first and second components moves horizontally to the gantry, which is stationarily located above a frame forming the third component. The component is positioned on the third component, which is a measuring slide that also moves horizontally to the portal.
  • An advantage of this construction method is the possibility of being able to execute the stationary portal very solid and stiff and therefore correspondingly accurate.
  • A disadvantage of this design is the need to move the component to be measured in an axial direction. The mass of the component has an influence on the measuring slide and the possible dynamics during the measuring movement.
  • In addition, a sufficiently good attachment of the component on the measuring carriage is required.
  • At one of the DE 101 11 540 A1 known coordinate measuring machine, the portal itself is movable instead of the component. This mobile portal coordinate measuring machine also has three linear axes. In contrast to the version with a stationary portal, this design has the advantage that the component does not have to be moved.
  • Since the entire portal is moved, the construction of the portal must be carried out as easily as possible in order to allow dynamic movements. The lighter design, however, leads to a reduction in the guidance accuracy of the axes located on the portal.
  • In the gantry design, the edge length of the possible Cartesian measuring volume results directly from the travel of the linear axes. Larger workpieces and thus larger measuring volumes require correspondingly longer linear axes.
  • The linear axes are designed so that the components are movably guided on tracks, rails or other guide elements. Since the guide rails or tracks in the sense of required accuracy are never quite straight or completely flat, errors in the movement of the components.
  • These errors are divided into two straightness errors and three rotatory errors. In addition, there is still a length error in the direction of movement. These errors are transmitted to the following axles attached to the moving component. The length and straightness errors are transmitted independently of the lever arm to the following axes and thus also to the touch probe. The rotary errors affect lever arm dependent on the following axes and thus also on the touch probe.
  • With increasing length of the axes, the effort increases significantly in order to achieve a high degree of guidance accuracy. In addition, the rotatory errors affect the following axes, due to longer lever arms stronger. It therefore takes a great effort to compensate for such geometric errors. As the measuring volume increases, the expenditure increases disproportionately in order to achieve a high measuring accuracy.
  • If one considers not only the situation under constant temperature conditions but also when the ambient temperature changes, it must be taken into account that the influence of the temperature changes the geometry of the guides. These changes can sometimes be very complex and can only be detected with complex procedures. In practice, therefore, an air conditioning of gantry-type measuring machines with high-precision requirements is common.
  • A part of the above-mentioned disadvantages, a coordinate measuring machine according to the preamble of claim 1 does not have that from the DE 42 38 139 C2 is known. It is a coordinate measuring machine, the probe or sensor via successively connected, mutually parallel axes of rotation is mounted movable in several degrees of freedom, the probe longitudinal axis is aligned approximately parallel to the axes of rotation and wherein the device has a workpiece table which is rotatable about a further axis of rotation , The necessity of providing a rotatable measuring table is also associated in this case with the disadvantage that the mass of the component has an influence on the measuring accuracy and the possible dynamics during the measuring movement. However, the use of a rotatable measuring table is required in this known coordinate measuring machine, because otherwise it would not be able to cover a measuring range which extends over 360 °. That depends on the one with it together that a support with a spindle is used as a supporting structure, by means of which a support for the articulated arm is vertically displaceable. The carrier carries a first and a second lever part, which form the articulated arm. Although the articulated arm is not movable in a range of 360 ° around the stand, the rotatable measuring table ensures that a component in a range of 360 ° can still be measured.
  • The object of the invention is to provide a coordinate measuring machine of the type mentioned in such a way that it is well suited for general measurement tasks and provides the required accuracy with less effort for large sizes of workpieces.
  • The object is achieved by a measuring device with the features specified in claim 1.
  • In the coordinate measuring machine according to the invention, neither the workpiece nor a portal must be moved, it only needs to be moved the arm forming the measuring arm, which is mounted on a strationary Tragstruktir. A rotatable measuring table is not required in the coordinate measuring machine according to the invention, nevertheless, a measuring range can be covered, which extends over 360 °. The invention makes this possible by rotating the articulated arm about the first axis of rotation and by pivoting the first arm and the second arm about the second axis of rotation. This, in turn, is made possible by the invention according to the invention that the articulated arm is rotatably mounted with the first pivot about the first axis of rotation at one end of a columnar base, which is fastened to the stationary support structure at its opposite end to the first pivot. Further, since the first component in a linear axis is movable up and down together with the sensor, the column for moving up and down a support for the swing arm is omitted, thereby providing space for movement of the swing arm in a range of 360 °. Rotary axes, as provided by the invention, offer the advantage that high accuracy can be achieved with significantly less effort than with linear axes.
  • The construction with rotation axes offers the further advantage that an enlargement of the measuring volume by an extension of the articulated arm is possible without the rotation axes themselves have to be changed.
  • If, in the coordinate measuring machine according to the invention, the length of the articulated arm is doubled, a double-radius measuring arm is achieved, thereby quadrupling the measuring volume. The effort to increase the measurement volume is thus significantly lower than in the described known coordinate measuring machines in gantry design.
  • The coordinate measuring machine according to the invention has particular advantages in the measurement of rotationally symmetrical components when they are arranged centrally below the first axis of rotation.
  • In the coordinate measuring machine according to the invention, the Cartesian coordinate system has been replaced by a polar coordinate system in which a certain radius and a certain angle are set by means of the articulated arm. For the rotations can be done around both axes of rotation simultaneously. The axes of rotation are much easier to control in terms of accuracy than linear axes and allow the invention to rotate about the axes of rotation in a range of 360 °.
  • In the known coordinate measuring machine with movable portal, the portal must be moved with the entire measurement setup. In the known coordinate measuring machine with stationary portal, the workpiece must also be moved with the measuring carriage. In the above-described known coordinate measuring machine with a rotatable workpiece table, the workpiece must be rotated with this workpiece table. By contrast, in the coordinate measuring machine according to the invention, only the articulated arm needs to be moved, which carries a touch probe at its free end.
  • Advantageous embodiments of the invention form the subject of the dependent claims.
  • In one embodiment of the coordinate measuring machine according to the invention, the rotary joints are each assigned a rotary drive and a rotary encoder, by means of which the articulated arm about the first axis of rotation and the arms about the second axis of rotation in selectable direction of rotation can be rotated by selectable angle. The above-described known coordinate measuring machine with rotatable workpiece table is a hand-held measuring device in which only one motor, a gear and a spindle for adjusting the vertical position of the arm carrying the swivel arm are present. In addition, the axes of rotation of the articulated arm only angle scales (so-called. Part circles) and reading heads and must therefore be operated by hand. This serves the purpose to minimize the necessary operating forces and moving masses in the hand-operated coordinate measuring machine in order to reduce deformations by the hand forces for operation and to enable simple, easy operation. For this purpose, however, a rotatable workpiece table is basically necessary, since otherwise not all measuring tasks are fulfilled could without re-clamping the workpiece to be measured. By contrast, in the coordinate measuring machine in this embodiment of the invention, a simple, easy operation is possible, because the setting of the measuring positions by means of a rotary drive and a rotary encoder takes place in each hinge.
  • In a further embodiment of the coordinate measuring machine according to the invention, the linear axis is parallel to the two axes of rotation. The or each sensor on the second component is therefore guided parallel to the two axes of rotation. This can represent a movement in the Z axis of the Cartesian coordinate system.
  • In a further embodiment of the coordinate measuring machine according to the invention, the second component is arranged on the support structure perpendicular to the linear axis of the first component and rotatably guided. Thus, the movement can be represented as a movement in the X or Y axis as well as in the Z axis of the Cartesian coordinate system.
  • In a further embodiment of the coordinate measuring machine according to the invention, the second arm is extended beyond the second rotary joint on the side of the second rotation axis opposite the first component. The extension of the second arm allows for weight compensation in the area of the second pivot joint.
  • In a further embodiment of the coordinate measuring machine according to the invention, the second arm is provided at its opposite to the first component free end with a counterweight. This allows weight compensation with less extension of the second arm.
  • In a further embodiment of the coordinate measuring machine according to the invention, the first arm with a closer to the support structure arranged third arm is fixedly connected, which is rotatable about the first axis of rotation together with the first arm and carries the second axis of rotation together with the first arm. By this configuration, the accuracy of storage is significantly improved. There are in this embodiment, two further arranged above pivot bearing available, which further improve the accuracy of the storage of the two axes of rotation, for example by less game or by achieving the same game with less effort.
  • In a further embodiment of the coordinate measuring machine according to the invention, the third arm and the second arm each have a free end projecting beyond the first and second rotational axes. This results in a weight balance, which can be avoided by acting on the axes of rotation moments and errors caused by weight shift.
  • In a further embodiment of the coordinate measuring machine according to the invention, the third arm and the second arm are each provided at its free end with a counterweight. As a result, with shorter arm lengths it is possible to avoid moments acting on the axes of rotation and errors being caused by shifting the weight. Regardless of the angular position of the articulated arm, thus only forces in the axial direction act on the axes of rotation and tilting of the movable structure is completely avoided.
  • In a further embodiment of the coordinate measuring machine according to the invention, the support structure is a stationary portal. This embodiment is optimal for the storage of the measurement setup with respect to a component to be measured.
  • In a further embodiment of the coordinate measuring machine according to the invention, the or each sensor is optionally rotatably mounted about a third axis of rotation. This extends the application possibilities of the sensor.
  • In a further embodiment of the coordinate measuring machine according to the invention, the second component is constructed of material with low thermal expansion. This minimizes the influence of temperature on the accuracy of the coordinate measuring machine.
  • Embodiments of the invention will be described in more detail below with reference to the drawings. It shows:
  • 1 1 is a perspective view of a first embodiment of the coordinate measuring machine according to the invention with a first embodiment of a sensor and in a first measuring phase,
  • 2 the coordinate measuring machine after 1 in a second measuring phase,
  • 3 the coordinate measuring machine after 1 in a third measurement phase,
  • 4 the coordinate measuring machine after 1 in a fourth measurement phase,
  • 5 the coordinate measuring machine after 1 in a fifth measurement phase,
  • 6 the first embodiment of the coordinate measuring machine according to 1 but with a second embodiment of the sensor and in a first measurement phase,
  • 7 the coordinate measuring machine after 6 in a second measuring phase,
  • 8th the coordinate measuring machine after 7 in a third measurement phase,
  • 9 3 is a perspective view of a second embodiment of the coordinate measuring machine according to the invention with a third embodiment of the sensor,
  • 10 in a perspective view of a third embodiment of the coordinate measuring machine according to the invention with the third embodiment of the sensor and in a first measuring phase and
  • 11 the coordinate measuring machine after 10 in a second measurement phase.
  • 1 shows a perspective view of a first embodiment of a coordinate measuring machine according to the invention, the total with 10 is designated and has a first embodiment of a sensor, the total with 30 is designated. A component to be measured is with 12 designated. The component 12 resting on a base or frame (not shown). The coordinate measuring machine 10 further includes a support structure 14 , which is designed here as a portal and is stationarily arranged on the substructure or frame. Furthermore, the coordinate measuring machine comprises 10 a first component 16 which can be moved up and down in a linear axis z and at its free lower end the sensor 30 wearing. The first component 16 is formed in the embodiment shown and described here as a square in cross-section column, in a guide 18 in the linear axis z is movable.
  • The coordinate measuring machine 10 includes a total of 20 designated movable second component, which as a total with 22 designated articulated arm is formed. The articulated arm 22 carries at its free end, ie at the in 1 right end the lead 18 the first component 16 , At its opposite end is the articulated arm 22 with a first swivel 24 around a first axis of rotation 26 rotatable on a columnar base 28 stored at her to the first swivel 24 opposite end to the support structure 14 is attached. The articulated arm 22 is at a first end 22a through the first pivot 24 over the base 28 on the supporting structure 14 attached. The articulated arm 22 carries at a second, opposite end 22b the leadership 18 with the first component 16 , Between the two ends 22a . 22b has the articulated arm 22 a second pivot 34 with one to the first axis of rotation 26 parallel second axis of rotation 36 on, that the articulated arm 22 in a first arm 31 and a second arm 32 divided. The second hinge 34 includes two articulated eyes 34a . 34b passing through a hinge pin 35 are rotatably connected to each other. The first arm 31 and the second arm 32 are therefore independent of each other about the first axis of rotation 26 or about the second axis of rotation 36 rotatable. By mutual relative rotation of the first arm 31 and the second arm 32 the radius can be changed to that of the linear axis z, in which the sensor 30 is stored, from the first axis of rotation 26 is spaced.
  • 1 shows the coordinate measuring machine 10 in a first measuring phase, in which the articulated arm 22 stretched, so the radius has its greatest value. The swivel joints 24 and 34 are each assigned a rotary drive and a rotary encoder, by means of which the articulated arm 22 around the first axis of rotation 26 and the arms 31 . 32 around the second axis of rotation 36 turn in selectable direction by selectable angle. The rotary encoders and rotary drives are conventional components that have not been shown for clarity. Likewise, the first component 16 with the help of one in the lead 18 arranged drive device, which is also not shown, in the linear axis z movable. The position and the route of the first component 16 can by a highly accurate scale, z. As a glass scale, are determined, which is also not shown.
  • By turning the articulated arm 22 around the first axis of rotation 26 and by pivoting the first arm 31 and the second arm 32 around the second axis of rotation 36 can cover a measuring range that extends over 360 °. This allows each component contour to be scanned without having to use three movable components, which can be moved on three mutually perpendicular guides or linear axes, as in the case of the portal-type coordinate measuring machine with stationary portal described above. Only the first component 16 of the coordinate measuring machine 10 is linearly movable, so that the component 12 can be sampled at different heights.
  • In a first embodiment, in the 1 to 5 is shown, the sensor includes 30 a touch probe from a push button 50 and a probe 52 , The button 50 can, as shown, simply be a stylus, which in addition to the linear movability of the sensor 30 in the z-direction in the probe 52 or together with the probe 52 around a third axis of rotation 46 is rotatable. The rotation of the button 50 is more important in embodiments of the sensor described below in which the button is not simply a single stylus with a ball at the end. In addition, the button 50 in the three coordinate directions x, y, z be deflected. These deflections of the button 50 can be measured additionally. In order to determine a measuring point, the measured values determined or set using the encoders mentioned above with pushbutton deflections, which are transmitted by encoders in the first component 16 be determined, compute correct component, to generate from this a measuring point, as z. B. from the document mentioned above DE 101 11 540 A1 is known.
  • In the 1 to 5 is the coordinate measuring machine 10 shown in different measuring phases. In a first measurement phase, the in 1 is shown, the radius between the first axis of rotation 26 and the third rotation axis 46 the greatest value.
  • In 2 , which shows a second measuring phase, is the articulated arm 22 bent by 90 ° and the first component 16 further shown above procedure, so that the button 50 now with his probe ball on the upper side of the component 12 located.
  • For scanning the same can now be the kinked articulated arm 22 continue around the first axis of rotation 26 be pivoted. A corresponding third measurement phase is in 3 shown.
  • In a fourth measurement phase, the in 4 shown is with the button 50 a right outer surface of the component 12 scanned, for which the angle to which the articulated arm 22 is bent in itself, again slightly enlarged and the first component 16 has been moved downwards in the z-direction.
  • 5 Finally, a fifth measurement phase, in which an outer front side of the component 12 is measured.
  • 6 shows the coordinate measuring machine 10 in the first embodiment, but with a second embodiment of a total with 30 designated sensor, the one about the third axis of rotation 46 in a probe 52 ' rotatable button 50 ' having two against each other by 90 ° angled styli. Shown is a first measurement phase, in which with one of the styli, which is arranged horizontally, a lower right outside of the component 12 is scanned.
  • 7 shows a second measuring phase of the coordinate measuring machine 10 to 6 in which a front lower side of the component 12 located on an upper right projection thereof is scanned with the same stylus.
  • 8th shows a third measuring phase, in which an upper right outside of the projection of the component 12 should be scanned.
  • 9 shows a second embodiment of a coordinate measuring machine, the total with 10 ' is designated. The moving first component 16 carries a third embodiment of a sensor, which has a button 50 '' having three cross-shaped styli and total with 30 '' is designated.
  • The button 50 '' is in a probe 52 '' around the third axis of rotation 46 rotatable.
  • In the coordinate measuring machine 10 ' is the second arm here with 32 ' is designated on the to the first component 16 opposite side of the second axis of rotation 36 about the second pivot, this one with 34 ' is extended out. This extension is used to balance the weight around the swivel joint 34 ' before a tilting load by the second arm 32 ' to preserve. It would be enough, the extension of the second arm 32 ' so that the weight compensation is effected. It is more useful, however, the additional length of the second arm 32 ' thereby restricting that at its free end a counterweight 38 is attached as it is in 9 is shown.
  • 10 shows a third embodiment of the coordinate measuring machine, with 10 '' is designated. Due to the illustrated embodiment of the coordinate measuring machine 10 '' a complete weight balance is achieved, not just a weight balance on the second arm 32 ' but also on the first arm 31 , For this purpose, the first arm 31 with a closer to the support structure 14 arranged third arm 31 ' firmly connected, in common with the first arm 31 around the first axis of rotation 26 is rotatable and together with the first arm 31 carries the second axis of rotation, here with 36 ' is designated. The third arm 31 ' is like the first arm 31 formed and accordingly with an additional first pivot 24 ' and an additional second pivot 34 ' Mistake. The first arm 31 and the third arm 31 ' are each between the swivel joints 24 and 34 respectively. 24 ' and 34 ' through a rigid connecting part 40 connected with each other. The articulated arm 22 and the third arm 31 ' wear each on their free, ie on their in 10 left end a counterweight 38 ' or a counterweight 39 , The size of the counterweights is sized so that a perfect balance of weight is achieved. It is noted that the third arm 31 ' in the illustration in 10 towards the top a continuation or extension of the first arm 31 is not an additional separate arm, but together with the first arm 31 forms a rigid arm assembly. This arm assembly could also be designed differently than shown.
  • 10 shows the coordinate measuring machine 10 '' in a measuring phase in which the radius between the first axis of rotation 26 and the third rotation axis 46 has the greatest value.
  • 11 shows the coordinate measuring machine 10 '' in a second measurement phase, in which the aforementioned radius has the smallest value.
  • In the description and in the claims is spoken by parallel or vertical axes. In reality, these axes, being flawed, are mathematically not exactly parallel or perpendicular. The terms parallel or perpendicular are to be understood only in relation to the reasonable and achievable accuracy for the present field of technology.
  • LIST OF REFERENCE NUMBERS
  • 10
    Coordinate measuring machine (1st embodiment)
    10 '
    Coordinate measuring machine (2nd embodiment)
    10 ''
    Coordinate measuring machine (3rd embodiment)
    12
    component
    14
    supporting structure
    16
    1st component
    18
    guide
    20
    2nd component
    22
    articulated arm
    22a
    1st end
    22b
    2nd end
    24
    1st swivel
    24 '
    another 1st swivel
    26
    1st rotation axis
    28
    Base
    30
    Sensor (1st embodiment)
    30 '
    Sensor (2nd embodiment)
    30 ''
    Sensor (3rd embodiment)
    31
    1st arm
    31 '
    3rd arm
    32
    2nd arm
    32 '
    2nd arm
    34
    2. Swivel
    34a
    joint eye
    34b
    joint eye
    35
    hinge pins
    36
    2nd rotation axis
    36 '
    2nd rotation axis
    38
    counterweight
    39
    counterweight
    40
    connecting part
    46
    3rd rotation axis
    50
    button
    50 '
    button
    50 ''
    button
    52
    probe
    52 '
    probe
    52 ''
    probe
    z
    linear axis

Claims (12)

  1. Coordinate measuring machine with at least one relative to a component to be measured ( 12 ) movable sensor ( 30 . 30 ' . 30 '' ), with at least one movable first component ( 16 ) containing the or each sensor ( 30 . 30 ' . 30 '' ) and at least one movable second component ( 20 ) is guided, and with a stationary support structure ( 14 ), at which the second component ( 20 ), the second component ( 20 ) as an articulated arm ( 22 ) is formed, which - at a first end ( 22a ) with a on the support structure ( 14 ) fixed first pivot ( 24 ) about a first axis of rotation ( 26 ) is rotatably mounted, - at a second, opposite end ( 22b ) the first component ( 16 ), and - between the two ends ( 22a . 22b ) a second pivot ( 34 ) with one to the first axis of rotation ( 26 ) parallel second axis of rotation ( 36 ) having the articulated arm ( 22 ) into a first and a second arm ( 31 . 32 ), which are independent of each other about the first and second axis of rotation ( 26 . 36 ) are rotatable, characterized in that the first component ( 16 ) in a guided tour ( 18 ) on the second component ( 20 ) is movable up and down in a linear axis (z) and that the articulated arm ( 22 ) with the first pivot ( 24 ) around the first axis of rotation ( 26 ) rotatably at one end of a columnar base ( 28 ) is mounted at its to the first rotary joint ( 24 ) opposite end to the support structure ( 14 ) is attached.
  2. Coordinate measuring machine according to claim 1, characterized in that the swivel joints ( 24 ) and ( 34 ) in each case a rotary drive and a rotary encoder are assigned, by means of which the articulated arm ( 22 ) around the first axis of rotation ( 26 ) and the arms ( 31 . 32 ) about the second axis of rotation ( 36 ) in selectable direction of rotation by selectable angle.
  3. Coordinate measuring machine according to claim 1 or 2, characterized in that the linear axis (z) to the two axes of rotation ( 26 . 36 ) is parallel.
  4. Coordinate measuring machine according to one of the preceding claims, characterized in that the second component ( 20 ) on the supporting structure ( 14 ) perpendicular to the linear axis (z) of the first component ( 16 ) is arranged and guided rotatably.
  5. Coordinate measuring machine according to one of the preceding claims, characterized in that the second arm ( 32 ) on the first component ( 16 ) opposite side of the second axis of rotation ( 36 ) via the second pivot ( 34 ) is extended.
  6. Coordinate measuring machine according to claim 5, characterized in that the second arm ( 32 ' ) at its to the first component ( 16 ) opposite free end with a counterweight ( 38 ) is provided.
  7. Coordinate measuring machine according to one of the preceding claims, characterized in that the first arm ( 31 ) with a closer to the support structure ( 14 ) arranged third arm ( 31 ' ), which, together with the first arm ( 31 ) around the first axis of rotation ( 26 ) is rotatable and together with the first arm ( 31 ) the second axis of rotation ( 36 ' ) wearing.
  8. Coordinate measuring machine according to claim 7, characterized in that the third arm ( 31 ' ) and the second arm ( 32 ) one each over the first or second axis of rotation ( 26 . 36 ) have projecting free end.
  9. Coordinate measuring machine according to claim 8, characterized in that the third arm ( 31 ' ) and the second arm ( 32 ) at its free end, each with a counterweight ( 38 . 39 ) are provided.
  10. Coordinate measuring machine according to one of the preceding claims, characterized in that the supporting structure ( 14 ) is a stationary portal.
  11. Coordinate measuring machine according to one of the preceding claims, characterized in that the or each sensor ( 30 . 30 ' . 30 '' ) about a third rotation axis ( 46 ) is rotatably mounted.
  12. Coordinate measuring machine according to one of the preceding claims, characterized in that the second component ( 20 ) is constructed of material with low thermal expansion.
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DE201110054932 DE102011054932B4 (en) 2011-10-28 2011-10-28 Coordinate measuring machine
EP12781025.7A EP2771641A1 (en) 2011-10-28 2012-10-11 Coordinate measuring apparatus
PCT/DE2012/000993 WO2013060317A1 (en) 2011-10-28 2012-10-11 Coordinate measuring apparatus

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DE102011054932A1 DE102011054932A1 (en) 2013-05-02
DE102011054932B4 true DE102011054932B4 (en) 2013-06-27

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NL1042417B1 (en) 2017-06-06 2018-12-13 Reginald Galestien Ir Method and apparatus for measuring a circumferential toothing contour of a toothed revolving object.

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Publication number Priority date Publication date Assignee Title
GB1498009A (en) * 1975-05-29 1978-01-18 Newall Eng Measuring device
DE3720795A1 (en) * 1987-06-24 1989-01-05 Stiefelmayer Kg C Device for measuring, marking (tracing), contacting, machining or the like of workpieces in three dimensions
DE4238139C2 (en) * 1992-11-12 2002-10-24 Zeiss Carl The coordinate

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