DE102017127882A1 - Method for checking rotationally mutually arranged components and devices therefor - Google Patents

Abstract

The present invention relates to a method for checking rotationally mutually arranged components (16, 17), in particular of components of angle encoders (15) or gears, in which a coordinate measuring machine (1) is provided which a turntable (11) for receiving a measuring workpiece and a Tastelementaufnahme (7), with which a probe element in at least two independent spatial directions to the turntable (11) is movable, wherein on the turntable, a first component (16) is arranged and wherein a second component (17) for the first component is rotatable, is received in a arranged on the Tastelementaufnahme holder (10). In addition, the invention relates to a corresponding holder (10) and a coordinate measuring machine (1).

Description

BACKGROUND OF THE INVENTION

FIELD OF THE INVENTION

The present invention relates to a method for checking or qualifying devices with rotatably arranged components, such as components of angle encoders or gearboxes. Moreover, the invention relates to a holder for a probe element recording of a coordinate measuring machine and a coordinate measuring machine for carrying out the method.

STATE OF THE ART

Coordinate measuring machines are known from the prior art for measuring components. For example, coordinate gauges in gantry design are known in which compared to a base with a receptacle for the component to be measured, a portal is movably arranged on which in turn a measuring head or a Tastelementaufnahme is arranged to move the measuring head or the Tastelementaufnahme to different points in three-dimensional space to move. Accordingly, an element or sensor, which is arranged on the probe element holder or on the measuring head, can be moved in different spatial directions in order to enable a three-dimensional detection of a component to be measured.

On the base for receiving the component to be measured may also be arranged a turntable on which the component to be measured can be arranged to bring by the rotation of the turntable to be measured component in different measuring positions.

Although a large number of measuring and examination tasks can be handled in an efficient manner with such known coordinate measuring machines, there is still a need to expand the possible applications of such a coordinate measuring machine.

DISCLOSURE OF THE INVENTION

OBJECT OF THE INVENTION

It is therefore an object of the present invention to provide a method with which additional measuring or qualification tasks can be solved by coordinate measuring machines. The coordinate measuring machines should be able to be used in a simple and efficient manner without much additional effort.

TECHNICAL SOLUTION

This object is achieved by a method with the features of claim 1 and with a holder with the features of claim 11 and a coordinate measuring machine with the features of claim 12. Advantageous embodiments are the subject of the dependent claims.

The invention opens up a completely new application for coordinate measuring machines, so that the field of application of the coordinate measuring machines is significantly expanded. At the same time it is achieved that the review and qualification of devices with rotatably arranged components is simplified.

The invention proposes, in order to check or qualify devices with rotatably arranged components to provide a coordinate measuring machine, which has a turntable for receiving a workpiece to be measured and a Tastelementaufnahme with which a probe element in at least two, preferably three independent spatial directions relative to the turntable is movable. According to the invention, the coordinate measuring machine is used so that a first component is arranged on the turntable and that a second component, which is connected to the first component so that both components can be rotated relative to each other, arranged in a on the Tastelementaufnahme the coordinate measuring machine Holder is added. Thus, it is possible to drive the first component with the turntable and to specify the rotation of the turntable or arranged on the turntable component via the coordinate measuring machine and / or to detect with a rotation angle detection device of the coordinate measuring machine. By arranging the second component via a holder on the Tastelementaufnahme the second component can be fixed, in particular rotatably disposed and / or it can axial and / or radial components of the rotationally fixed second component, which are caused by the rotation of the first component over the probe element holder of the coordinate measuring machine can be compensated for and / or detected.

In particular, angle measuring devices with a stator and a rotor can be easily checked or qualified. For this purpose, the stator of the angle measuring device can be arranged on the turntable of the coordinate measuring machine and the rotor of the angle measuring device can be fixed to the holder on the Tastelementaufnahme. Now, if the turntable is rotated in a defined manner, then there is a relative rotational movement between the stator and the rotor, which can be detected by the angle encoder. By comparing the defined Rotation of the turntable or the stator of the angle measuring device and the detection of the angle of rotation between stator and rotor by the angle measuring device itself, it can be determined to what extent a deviation between the rotation angle detected by the angle measuring device and the predetermined by the coordinate measuring machine or detected by the rotation angle detection means of the coordinate measuring machine rotation angles is present. It is assumed that the accuracy of the turntable is significantly higher than that of the measuring system to be measured.

Another advantage of the system is that the structure is very flexible and the structure does not have to be changed for different parts. Accordingly, this process can also be automated.

A possible deviation from a pure rotational movement between stator and rotor, for example by an axial movement of the rotor with respect to the stator during the rotation to each other or by a radial displacement of the rotor during the rotational movement by an axial - error or wobble or an imbalance of the rotor, can be compensated by a corresponding movement of the Tastelementaufnahme according to the at least two, preferably three independent spatial directions.

In addition, it is possible to detect the movement of the probe element receptacle for compensating an axial and / or radial offset of the rotor received in the holder with respect to a desired position and thus to detect the deviation of the rotational movement of a rotor in a stator of an angle measuring device.

Instead of an angle measuring device, it is also possible to check or qualify a transmission, wherein the components arranged rotatably relative to one another can be the drive shaft and the output shaft of the transmission. The drive shaft can in turn be attached to the turntable of the coordinate measuring machine and the output shaft can be rotatably arranged on the holder on the Tastelementaufnahme. In particular, the output shaft can be rotatably arranged on the holder of the Tastelementaufnahme via an angle measuring device. By rotation of the turntable rotatably mounted on the turntable drive shaft of the transmission can be moved and also cause a rotational movement of the output shaft via the transmission. A possible axial and / or radial offset of the arranged on the holder of the Tastelementaufnahme output shaft with respect to a desired position can be compensated and / or detected by the corresponding movement of the Tastelementaufnahme.

In addition, an angle measuring device for measuring the relative rotation of the output shaft with respect to the holder may be arranged on the holder on the Tastelementaufnahme, so with the predetermined by the coordinate measuring machine and / or by the rotation angle detection means of the coordinate 1 detected rotation of the drive shaft comparison with the determined rotation of the output shaft is made possible.

Furthermore, by determining the driving force or the torque of the turntable, the torsional stiffness of the gear can be detected, as long as it is less than the torsional rigidity of the measuring head.

For exact centered arrangement of the first component on the turntable of the coordinate measuring machine, a jaw chuck can be used, which can be arranged on the turntable.

By repeating the measurements with different arrangement of the components to be tested on the coordinate measuring machine, the measurements can be refined by eliminating influences caused by the arrangement of the components to be checked on the coordinate measuring machine. For example, measurements can be carried out with a different arrangement of the turntable on the coordinate measuring machine and / or a jaw chuck on the turntable, for example by an offset by a rotational angle arrangement of the turntable or the jaw chuck on the coordinate measuring machine.

For carrying out the method according to the invention, a holder for receiving a component on a probe element holder of a coordinate measuring machine is also proposed, with which a shaft or a rotatable component of a device to be tested can be rotationally fixed or rotatably received on the probe element holder of a coordinate measuring machine.

In addition, a coordinate measuring machine with a corresponding holder for carrying out the method according to the invention is proposed, wherein the coordinate measuring machine in particular further holders, such as a housing holder for supporting or fixing a housing of at least one of the components to be checked may have. A corresponding housing holder can be provided, for example, on the base of the coordinate measuring machine.

If this holder is designed to be correspondingly larger, it can also be used to measure entire electric motors, as used, for example, in the automotive industry.

list of figures

• 1 eine Seitenansicht eines Koordinatenmessgeräts mit erfindungsgemäßen Vorrichtungen zur erfindungsgemäßen Qualifizierung eines Winkelmessgeräts,
• 2 eine Seitenansicht eines Koordinatenmessgeräts mit erfindungsgemäßen Vorrichtungen zur erfindungsgemäßen Qualifizierung eines Getriebes und in
• 3 eine seitliche Schnittansicht einer erfindungsgemäßen Halterung.

The accompanying drawings show in a purely schematic manner in FIG

• 1 a side view of a coordinate measuring machine with devices according to the invention for the qualification of an angle measuring device according to the invention,
• 2 a side view of a coordinate measuring machine with inventive devices for the qualification of a transmission according to the invention and in
• 3 a side sectional view of a holder according to the invention.

EMBODIMENTS

Further advantages, characteristics and features of the present invention will become apparent from the following detailed description of the embodiments. However, the invention is not limited to these embodiments.

The 1 shows a side view of a coordinate measuring machine 1 as it can be used for the measurement of different components. The coordinate measuring machine 1 , which is built in portal construction, has a pedestal 3 on which a portal 2 with two columns 4 is stored, which in X - Direction by the arrow 5 is marked, is movable. The X - Direction thus runs perpendicular to the image plane. At the two columns 4 of the portal 2 is a crossbeam 6 arranged on which a measuring head 7 is formed, along the crossbar 6 in Y - Direction by the double arrow 8th is displayed, is displaceable. In addition, the measuring head 7 on the transom 6 stored so that he according to the double arrow 9 in Z - The direction is adjustable so that its distance relative to the base 3 can be adjusted. At the measuring head 7 Usually, a sensor or probe element is arranged for measuring a component, so that the measuring head 7 Also may be referred to as a probe element recording. Due to the mobility of the probe element recording in three independent spatial directions according to the Cartesian coordinate system XYZ a 3 - dimensional measurement of components can be carried out.

For the inventive use of the coordinate measuring machine 1 is used instead of a probe element on the measuring head 7 or the Tastelementaufnahme a holder 10 arranged in which a rotor 17 an angle encoder 15 can be attached.

The coordinate measuring machine 1 also has a turntable 11 on top, a jaw food 12 includes so as to be able to record components in a centered manner, for example, in the coordinate measuring machine 1 to be measured. At the in 1 shown use of the coordinate measuring machine 1 is in the jaw food 12 of the turntable 11 the stator 16 of the angle encoder 15 centered stored.

The turntable 11 of the coordinate measuring machine 1 has a drive, with which the turntable 11 around a central axis of rotation 18 can be turned. The rotational position of the turntable 11 can by a rotation angle detecting means of the coordinate device 1 , which is not shown in detail, are recorded.

For the three-dimensional measurement of components on the turntable 11 can be arranged, the coordinate measuring machine has 1 also corresponding drives for the portal 2 and the measuring head 7 on, by a corresponding control, which is also not shown in detail, the position of the portal 2 as well as the measuring head 7 with respect to the transom 6 can be detected.

The coordinate measuring machine 1 now becomes the qualification of the angle measuring device 15 according to the embodiment of the 1 be operated so that the turntable 11 in a defined way around its axis 18 is turned. This is also the stator 16 in the jaw food 12 of the turntable 11 clamped, turned accordingly. At the same time, however, the rotor 17 firmly in the holder 10 is clamped by the holder 10 held against rotation, so that the stator 16 according to the rotation of the turntable 11 relative to the rotor 17 is twisted. For checking or qualifying the angle encoder 15 can now the from the coordinate measuring machine 1 Detected rotation of the turntable 11 with the angle encoder 15 detected rotation of the stator 16 with respect to the rotor 17 be compared.

During the review or qualification of the angle encoder 15 becomes the measuring head 7 adjusted so that any axial and / or radial movements of the in the holder 10 received end of the rotor 17 be compensated. This can be done so that the measuring head 7 is operated so that no force and / or torque between the measuring head 7 and rotor 17 be exercised. At the same time, the movement of the measuring head 7 to compensate for possible radial and / or axial movements of the holder 10 included end of the rotor 17 be detected, so that any deviations of the rotational movement of the rotor 17 in the stator 16 can be determined by a pure rotational movement with respect to an axial movement and / or a radial imbalance.

This can be done in a very simple manner without much extra effort a coordinate measuring machine 1 for the qualification of angle encoders 15 be used. It is just a special holder 10 for the rotor 17 necessary, in the Tastelementaufnahme or the measuring head 7 must be arranged.

In addition, other devices can be checked or qualified with rotatably arranged components, such as gear. A corresponding example is in the 2 shown.

In this embodiment, the transmission 25 with its drive shaft 26 again in a centered manner in the jaw chuck 12 of the turntable 11 with respect to the axis of rotation 18 of the turntable 11 arranged. The output shaft 27 of the transmission 25 is via an angle measuring device 13 turn on a bracket 10 at the measuring head 7 of the coordinate measuring machine 1 arranged. Via a base holder 14 standing at the pedestal 3 of the coordinate measuring machine 1 is arranged, the transmission housing 28 fixed so that upon rotation of the turntable 11 the drive shaft 26 is driven and according to the translation of the transmission 25 the output shaft 27 is also rotated. The rotation of the output shaft 27 with respect to the holder 10 can by the angle measuring device 13 be detected while rotating the turntable 11 in turn by the corresponding rotation angle detecting means of the coordinate measuring machine 1 can be determined. This can also be in a simple way, the rotational ratio of the drive shaft 26 to the output shaft 27 determine. Furthermore, by detecting the drive power or the torque of the turntable 11 the torsional strength of the gearbox 45 be determined, for example by detecting the drive current for the turntable 11 ,

The measurements for checking or qualification of rotatably mounted components can be further refined by the qualifying components, such as the angle encoder 15 or the gearbox 28 in different rotational positions on the turntable 11 can be arranged to eliminate measurement errors of storage. For example, the jaw chuck 12 in different angular positions with respect to the axis of rotation 18 on the turntable 11 be arranged to influences the turntable 11 or the jaw food 12 to eliminate the measurement.

The holder 10 can be designed in various ways to the corresponding components, such as the rotor 17 of the angle encoder 15 or the output shaft 27 or the angle measuring device 13 in the holder 10 to be able to record. An example is in the 3 shown in the 3 shown bracket 10 for the qualification of the angle measuring device 15 according to the embodiment of the 1 Can be used. The holder 10 has a flange body 19 on, on which a fastening neck 20 for holding the bracket 10 at the measuring head 7 or the Tastelementaufnahme is provided. Opposite the attachment pipe 20 is a receiving socket 21 trained, a recording room 22 for the rotor 17 of the angle encoder 15 Are defined. For fixing the rotor 17 is in the side wall of the recording room 22 at least one passage opening 23 formed, in which a fixing screw 24 can be used to the rotor 17 in the recording room 22 to jam.

Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that the invention is not limited to these embodiments, but rather modifications are possible in the manner that individual features omitted or other combinations of features can be realized without departing from the scope of the appended claims. In particular, the present disclosure includes all combinations of the individual features shown in the various embodiments, so that individual features that are described only in connection with an embodiment can also be used in other embodiments or combinations of individual features not explicitly shown.

LIST OF REFERENCE NUMBERS

1

coordinate measuring machine

2

portal

3

base

4

pillar

5

X - direction

6

crossbeam

7

Measuring head or probe element holder

8th

Y direction

9

Z - Direction

10

holder

11

turntable

12

jaw chuck

13

Angle measuring device

14

plinth

15

angle meter

16

stator

17

rotor

18

axis of rotation

19

flange

20

fixing connection

21

receiving socket

22

accommodation space

23

Through opening

24

fixing screw

25

transmission

26

drive shaft

27

output shaft

28

gearbox

Claims (13)

Method for checking rotationally mutually arranged components (16, 17, 26, 27), in particular components of angle measuring devices (15) or gearboxes (25), in which a coordinate measuring machine (1) is provided, which has a turntable (11) for receiving a workpiece to be measured and a Tastelementaufnahme (7), with which a probe element in at least two independent spatial directions to the turntable (11) is movable, characterized in that on the turntable, a first component (16, 26) is arranged and that a second component (17, 27), which is rotatable to the first component, is received in a arranged on the Tastelementaufnahme holder (10). Method according to Claim 1 , characterized in that the rotatingly arranged components are a stator (16) and a rotor (17) of an angle measuring device (15), wherein the stator is arranged on the turntable (11) of the coordinate measuring machine and the rotor in the holder (10). is fixed to the Tastelementaufnahme (7), then rotated to check the angle measuring the turntable and the angle of rotation of the turntable and the rotation angle between the stator and rotor of the angle encoder is detected, so by the defined rotation of the turntable and detecting the rotation angle of the turntable and by Detecting the angle of rotation detected by the angle measuring device between the stator and the rotor and comparing the determined angle of rotation the angle measuring device can be qualified. Method according to one of the preceding claims, characterized in that an axial and / or radial offset of the holder (10) received in the end of the rotor (17) with respect to a desired position by a corresponding movement of the Tastelementaufnahme (7) is compensated. Method according to Claim 3 , characterized in that the movement of the Tastelementaufnahme (7) to compensate for an axial and / or radial displacement of the in the holder (10) received end of the rotor (17) is detected with respect to a desired position. Method according to Claim 1 , characterized in that the components arranged in rotation with respect to each other are a drive shaft (26) and an output shaft (27) of a transmission (25), wherein the drive shaft is arranged on the turntable (11) of the coordinate measuring machine and the output shaft is rotatable relative to the holder (10 ) is arranged on the holder (10) on the Tastelementaufnahme (7), so that driven by rotation of the turntable drive shaft and output shaft. Method according to Claim 5 , characterized in that an axial and / or radial offset of the holder (10) arranged on the output shaft (27) with respect to a desired position by a corresponding movement of the Tastelementaufnahme (7) compensated and / or detected. Method according to Claim 5 or 6 , characterized in that on the holder an angle measuring device (13) for measuring the relative rotation of the output shaft (27) to the holder (10) is arranged. Method according to one of Claims 5 to 7 , characterized in that the driving force of the turntable (11) for determining the rotational stiffness of the transmission (25) is detected. Method according to one of the preceding claims, characterized in that on the turntable (11) of the coordinate measuring machine (1) a jaw chuck (12) is used for the centered arrangement of a first component. Method according to one of the preceding claims, characterized in that the method is repeatedly performed with different arrangements of the turntable (11) on the coordinate measuring machine and / or a jaw chuck (12) on the turntable, in particular with offset by a rotation angle arrangements. Holder for the probe element holder of a coordinate measuring machine, in particular for carrying out the method according to one of the preceding claims, with a connection (20) for fastening the holder to the probe element holder of the coordinate measuring machine, characterized characterized in that the holder further comprises a receptacle (21) for fixed or rotatable attachment of a shaft. Coordinate measuring machine, in particular for carrying out the method according to one of Claims 1 to 10 , with a bracket after Claim 11 , Coordinate measuring device according to Claim 12 , characterized in that the coordinate measuring machine (1) has a housing holder (14) for holding a housing of at least one of the components to be tested on the base (3) of the coordinate measuring machine.

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