JP6254417B2 - measuring device - Google Patents

Description

  The present invention relates to a measuring apparatus, and for example, relates to a measuring apparatus that measures a shaft object work in which a longitudinal direction is arranged in a substantially vertical direction.

  When measuring surface properties such as the surface roughness and shape of a workpiece, the measurement accuracy can be improved by minimizing the influence of gravity. For example, the measuring device disclosed in Non-Patent Document 1 supports the longitudinal direction of a shaft workpiece such as a crank or a camshaft of an automobile arranged in the vertical direction. The measuring apparatus supports the upper end of the shaft workpiece so as to allow rotation of the shaft workpiece, and supports the lower end of the shaft workpiece on the rotary table. And the said measuring apparatus repeats the process of contacting a measuring element to a side of this axis | shaft workpiece from the side while rotating a axis | shaft workpiece | work by rotating a rotary table, and the surface of an axis | shaft workpiece | work is repeated. Measure properties.

  Incidentally, Patent Document 1 discloses a general three-dimensional measuring machine. The coordinate measuring machine includes a surface plate, and two directions orthogonal to each other on the upper surface of the surface plate are defined as a left-right direction and a front-rear direction, respectively, and a direction perpendicular to the upper surface of the surface plate is defined as an up-down direction. A gate-type frame is arranged so as to straddle the left and right. The portal frame is movable in the front-rear direction, and a probe is provided on the portal frame so as to be movable in the horizontal direction and the vertical direction. Such a three-dimensional measuring machine arranges a workpiece on the upper surface of a surface plate and measures the surface property of the workpiece by, for example, following the outer shape of the workpiece with a probe.

JP 2012-53033 A

http://www.komatsu-machinery.co.jp/HP/japanese/seihin_kousaku_gdb.html

  In general, when measuring the surface property of a shaft workpiece, the shaft workpiece is supported by fitting a cone into a recess formed on the end surface of the shaft workpiece. The measuring device of Non-Patent Document 1 is not an example, and the shaft object work is supported by fitting the cone into the recessed portion of the end face of the shaft object work, but the center of gravity of the cone depends on the inclination of the shaft object work. Since the distance from the position to the contact point between the cone and the workpiece is changed, it is difficult to satisfactorily correct the inclination of the workpiece, and the measurement value includes an inclination error. Further, the measuring device of Non-Patent Document 1 has a mechanism in which the probe is driven only in two axial directions (a direction in which the probe approaches the workpiece and a direction parallel to the axial direction of the workpiece). For this reason, unless the shaft workpiece is continuously rotated, the surface property of the shaft workpiece cannot be measured, and the measurement value includes a rotation error. That is, the measurement device of Non-Patent Document 1 has low measurement accuracy.

  On the other hand, if the coordinate measuring machine of patent document 1 is set as the structure which can arrange | position the longitudinal direction of a shaft workpiece work to an up-down direction on the upper surface of a surface plate and can measure the surface property of the said shaft workpiece workpiece, It will increase in size.

  The present invention has been made to solve such problems, and in a state in which the longitudinal direction of the shaft workpiece is arranged in a substantially vertical direction, the shaft has high measurement accuracy without increasing the size of the measuring device. An object of the present invention is to provide a measuring apparatus capable of measuring the surface property of a workpiece.

  A measuring apparatus according to an aspect of the present invention includes a first support portion that supports an upper end portion of a shaft object workpiece having a longitudinal direction arranged substantially in the vertical direction, and is disposed below the first support portion, A second support part that supports the lower end of the first support part, and a measuring machine that includes the first support part and a probe that measures a surface property of the shaft object work supported by the second support part, The first support portion, the second support portion, and the longitudinal end portion of the shaft workpiece can be engaged with each other by a convex spherical pedestal and a bearing that receives the convex spherical pedestal.

  In the above-described measuring apparatus, it is preferable to include a rotation preventing unit that prevents the shaft workpiece work from rotating.

  In the measuring apparatus described above, a concave portion is provided on the longitudinal end surface of the shaft object workpiece, and the convex spherical pedestal that is fitted into the concave portion is provided on the first support portion and the second support portion. It is preferable.

  In the above-described measurement apparatus, it is preferable that the first support portion includes a pushing portion that pushes the shaft workpiece work substantially upward or substantially downward and maintains the pushed state.

  In the measurement apparatus described above, it is preferable that the first support portion is movable along a guide extending in a substantially vertical direction.

  In the measuring apparatus described above, the measuring machine is preferably a three-dimensional measuring machine.

  According to the present invention, it is possible to provide a measuring device capable of measuring the surface properties of a shaft workpiece with high measurement accuracy without increasing the size of the measuring device in a state in which the longitudinal direction of the shaft workpiece is arranged in a substantially vertical direction. it can.

It is a perspective view showing roughly a measuring device of an embodiment. It is a perspective view which shows roughly the support mechanism and three-dimensional measuring machine of a shaft object workpiece | work in the measuring apparatus of embodiment. It is a figure which shows a mode that the edge part of the conventional shaft thing workpiece | work is supported. It is a figure which shows the relationship between the cone and shaft object workpiece | work when a shaft object workpiece | work is inclined and supported. It is a fragmentary sectional view which shows the 1st support part in the measuring apparatus of embodiment. It is a figure which shows a mode that the upper end part of a shaft workpiece workpiece is supported by the 1st support part in the measuring apparatus of embodiment. It is sectional drawing which shows the 2nd support part in the measuring apparatus of embodiment. It is a figure which shows a mode that the lower end part of a shaft workpiece workpiece is supported by the 2nd support part in the measuring apparatus of embodiment.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate. In the following description, in order to clarify the explanation, the left-right direction, the front-rear direction, and the up-down direction are defined and described, but the directions are appropriately changed depending on the usage form.

  A basic configuration of the measuring apparatus according to the present embodiment will be described. Here, FIG. 1 is a perspective view schematically showing the measuring apparatus of the present embodiment. FIG. 2 is a perspective view schematically showing a support mechanism for a workpiece and a coordinate measuring machine.

  As shown in FIGS. 1 and 2, the measuring apparatus 1 according to the present embodiment includes a base 2, a support mechanism 3, and a three-dimensional measuring machine 4. For example, the base 2 in a state where the axial direction is a vertical direction. A shaft workpiece W such as a crank or a camshaft of an automobile installed above is supported by the support mechanism 3, and surface properties such as surface roughness and shape of the shaft workpiece W are measured by the three-dimensional measuring machine 4.

  The base 2 is a frame member that supports the support mechanism 3 and the three-dimensional measuring machine 4, and the upper surface is arranged substantially horizontally in a state where the measuring device 1 is placed on the floor surface. The support mechanism 3 supports a shaft workpiece W having a longitudinal direction (axial direction) arranged in a substantially vertical direction (substantially vertical direction). The support mechanism 3 of the present embodiment includes a first support part 5, a second support part 6, and a rotation prevention part 7.

  As shown in FIG. 2, the first support portion 5 is supported by a column 29 erected on the base portion 2 via a slider 31, and the upper end portion of the shaft workpiece W whose longitudinal direction is arranged substantially in the vertical direction. Support. The first support portion 5 allows rotation of the shaft workpiece W around the central axis extending in the longitudinal direction of the shaft workpiece W. In addition, the specific structure of the 1st support part 5 and its periphery is mentioned later.

  The 2nd support part 6 supports the lower end part of the shaft workpiece W which has arrange | positioned the longitudinal direction to the substantially up-down direction. The second support portion 6 is disposed so as to face the first support portion 5 in the up-down direction, and a portion of the second support portion 6 that supports the shaft workpiece W and the first support portion 5 The portion that supports the shaft workpiece W is disposed at substantially the same position when viewed in the vertical direction.

  The second support portion 6 is provided on the rotary table 8. The turntable 8 is provided on the base 2, and the upper surface is disposed substantially horizontally with the measuring device 1 placed on the floor surface. The turntable 8 rotates around a rotating shaft that extends in the vertical direction. When viewed in the vertical direction, a portion for supporting the workpiece workpiece W in the first support portion 5 and a portion for supporting the workpiece workpiece W in the second support portion 6 are disposed on the rotation axis of the turntable 8. .

  As described above, the upper end portion of the shaft workpiece W is supported by the first support portion 5 so as to allow the rotation of the shaft workpiece W, and the lower end portion of the shaft workpiece W rotates in conjunction with the rotation of the rotary table 8. When the rotary table 8 is rotated by being supported by the second support portion 6, the shaft workpiece W is rotated about the rotation axis. A specific configuration of the second support portion 6 will also be described later.

  The rotation prevention unit 7 prevents the rotation of the shaft workpiece W whose longitudinal direction is arranged substantially in the vertical direction. On the turntable 8, a rotation prevention portion 7 is provided separately from the second support portion 6 at a position radially outward from the center of the turntable 8 with respect to the second support portion 6. The rotation prevention unit 7 includes an upright member 7a installed on the rotary table 8 and an arm 7b provided at the tip of the upright member 7a. The arm 7b is hooked on a portion projecting to the side of the shaft workpiece W, whereby the rotation of the shaft workpiece W supported by the first support portion 5 and the second support portion 6 (that is, the rotation table 8). Rotation of the workpiece workpiece W not accompanying rotation) is prevented. The upright member 7 a of the rotation prevention unit 7 has a mechanism that can move along the radial direction of the turntable 8. Thereby, the front-end | tip part of the arm 7b can be approached and separated with respect to the shaft workpiece W. However, the rotation preventing unit 7 may be configured to prevent the rotation of the shaft workpiece W. For example, the rotation prevention unit 7 may be configured to sandwich the shaft workpiece W.

  As shown in FIG. 1, the three-dimensional measuring machine 4 is arranged on the side of the shaft workpiece W whose longitudinal direction is arranged substantially in the vertical direction (that is, the direction orthogonal to the vertical direction). The surface property of the shaft workpiece W is measured by bringing the probe 14 close to the shaft workpiece W from the direction (direction perpendicular to the axial direction of the shaft workpiece W). That is, a so-called horizontal three-dimensional measuring machine is arranged as a three-dimensional measuring machine on the side of the shaft workpiece W whose longitudinal direction is arranged substantially vertically.

  The coordinate measuring machine 4 includes a left-right direction drive mechanism (left-right direction drive unit) 10, a vertical direction drive mechanism (vertical direction drive unit) 11, a front-rear direction drive mechanism (front-rear direction drive unit) 12, a probe head 13, a probe 14, A processing device 15 and a housing 16 are provided. However, since these elements are substantially the same as a general horizontal type three-dimensional measuring machine, they are simply illustrated and described.

  The configuration of the left-right drive mechanism 10 is not particularly limited as long as the probe 14 can be moved in the left-right direction. For example, a guide that extends in the left-right direction and is provided on the base 2, along the guide A moving slider and driving means for driving the slider are provided.

  The configuration of the vertical drive mechanism 11 is not particularly limited as long as the probe 14 can be moved in the vertical direction. For example, a guide extending in the vertical direction and provided on a slider of the horizontal drive mechanism 10, A slider that moves along the guide and driving means for driving the slider are provided.

  The configuration of the front-rear direction drive mechanism 12 is not particularly limited as long as the probe 14 can be moved in the front-rear direction. For example, a guide that extends in the front-rear direction and is provided on a slider of the vertical direction drive mechanism 11, A slider that moves along the guide and driving means for driving the slider are provided.

  Each driving means includes, for example, a rack, a pinion screwed into the rack, a motor that rotates the pinion, and the like.

  The probe head 13 is provided on the slider of the front-rear direction drive mechanism 12 and is configured to be able to swing (rotate). That is, the probe head 13 is operable so that a set of trajectories drawn by the tip of the probe 14 provided on the probe head 13 forms a substantially hemispherical shape. By using such a probe 14, for example, a shape such as a screw hole formed in the vertical direction of the shaft workpiece W as shown in FIG. 5 can be easily measured.

  As the probe 14, a probe used in a general three-dimensional measuring machine can be used, and a contact type or non-contact type probe can be used.

  The processing device 15 controls each driving means and the probe head 13 or derives the surface property of the shaft workpiece W based on the measurement signal input from the probe 14.

  As apparent from comparison between FIG. 1 and FIG. 2, the housing 16 accommodates the left-right direction driving mechanism 10, the up-down direction driving mechanism 11, and the front-rear direction driving mechanism 12, and allows the probe 14 to move in the three-dimensional direction. As shown, a bellows-like movement permitting portion 16a is provided.

  With such a configuration, the measuring apparatus 1 according to the present embodiment uses a so-called horizontal three-dimensional measuring machine 4, so that the shaft workpiece W having the longitudinal direction arranged substantially vertically is placed on the surface of the shaft workpiece W from the side. Compared with the case of measuring the surface property of a workpiece W having a longitudinal direction arranged substantially vertically with a conventional three-dimensional measuring machine using a portal frame, the measuring device can be made smaller. be able to.

  Moreover, since the measuring apparatus 1 of this Embodiment can move the probe 14 freely in a three-dimensional direction, it can measure the shaft workpiece W compared with the measuring apparatus which drives a probe only to an up-down direction and the front-back direction. Wide range. That is, when measuring the surface property of the shaft workpiece W, the shaft workpiece W can be measured in the left-right direction without continuously rotating the shaft workpiece W. For this reason, what is necessary is just to rotate the said shaft workpiece W every time the surface property of the predetermined range of the shaft workpiece W is measured. That is, since the shaft workpiece W is in a stationary state at the time of measurement, the rotation error of the rotary table 8 is not included in the measured value of the shaft workpiece W. Therefore, measurement accuracy can be improved.

  Next, specific configurations of the first support part 5 and the second support part 6 in the support mechanism 3 of the present embodiment will be described. Here, FIG. 3 is a figure which shows a mode that the edge part of the conventional shaft workpiece workpiece is supported. FIG. 4 is a diagram showing a relationship between the cone and the shaft workpiece when the shaft workpiece W is supported in an inclined state.

  In general, a crank or camshaft that is a shaft workpiece W has recesses (bearing portions) W1 that are supported at the time of processing formed on both end surfaces in the longitudinal direction, and the cross-sectional shape of the recess W1 is as follows. For example, it is formed in a substantially Y shape.

  And conventionally, when measuring the surface property of the shaft workpiece W, as shown in FIG. 3, the shaft workpiece is fitted into the recess W1 so as to be in surface contact with the inclined surface of the recess W1. W was supported.

  At this time, the inclination of the shaft workpiece W is determined based on, for example, the inclination of the line connecting the gravity centers G of the upper and lower cones a. The cone a rotates so as to follow the inclination of the shaft workpiece W. As shown in FIG. 4, when the shaft workpiece W is supported in an inclined state, the inclination of the central axis of the shaft workpiece W and the inclination of the line connecting the center of gravity G of the upper and lower cones a are shifted. The exact inclination of the shaft workpiece W could not be detected. The center of gravity G of the cone a is obtained from the result of measuring the cone itself.

  Then, the 1st support part 5 and the 2nd support part 6 of this Embodiment are supporting the upper-lower-end part of the shaft workpiece W with the convex spherical base. Here, FIG. 5 is a partial cross-sectional view showing the first support portion of the present embodiment. FIG. 6 is a diagram illustrating a state in which the upper end portion of the shaft object workpiece is supported by the first support portion of the present embodiment. FIG. 7 is a cross-sectional view showing the second support portion of the present embodiment. FIG. 8 is a diagram illustrating a state in which the lower end portion of the workpiece is supported by the second support portion of the present embodiment.

  As shown in FIG. 5, the first support portion 5 includes a convex spherical pedestal 17, a jig 18, a bearing 19, a first vertical movement mechanism 20, a push mechanism (push portion) 21, and a housing 22. Yes. The convex spherical pedestal 17 includes a sphere 23 and an insertion portion 24. As shown in FIG. 6, the sphere 23 is fitted into a recess W1 formed on one end surface in the longitudinal direction of the shaft workpiece W when measuring the surface property of the shaft workpiece W, for example, the inclination of the recess W1. Touch the surface. The insertion portion 24 is a tapered rod-shaped member that decreases in diameter upward, and the sphere 23 is connected to the lower end portion. In addition, the insertion part 24 and the spherical body 23 may be integrally formed.

  The jig 18 is a rod-like member extending in the vertical direction, and the upper portion is accommodated in the housing 22. A hole 18a corresponding to the insertion portion 24 is formed in the jig 18 in the vertical direction, and the insertion portion 24 is inserted into the hole 18a from below. At this time, the center of the sphere 23 is arranged on the rotation axis of the turntable 8. Thus, the convex spherical base 17 can be attached to and detached from the jig 18 by adopting a configuration in which the insertion portion 24 can be inserted into the jig 18. Therefore, the convex spherical pedestal 17 having a different diameter of the sphere 23 can be exchanged according to the size of the recess W1 formed on one end surface in the longitudinal direction of the shaft workpiece W.

  Incidentally, the jig 18 is preferably provided with a through hole 18b in a direction substantially perpendicular to the vertical direction at a height position partially overlapping with the upper end portion of the insertion portion 24 inserted into the hole 18a. Thereby, for example, when a pin is inserted into the through-hole 18b, the pin can be brought into contact with the upper end portion of the insertion portion 24, and the upper end portion of the insertion portion 24 can be pushed downward. Can be easily removed.

  The convex spherical pedestal 17 is preferably connected to the jig 18 by a connecting member such as a wire 25, for example. For example, one end of the wire 25 is connected to the convex spherical pedestal 17, and the other end of the wire 25 is hooked on a hook 18 c or the like provided on the jig 18. Thereby, even if the convex spherical pedestal 17 comes out of the jig 18 when the shaft workpiece W is removed, it does not fall.

  Such a jig 18 is supported by the first vertical movement mechanism 20 via a bearing 19, and can be rotated around a central axis extending in the vertical direction of the jig 18. Thereby, the convex spherical pedestal 17 can rotate around the central axis extending in the vertical direction of the jig 18.

  The first vertical movement mechanism 20 is accommodated in the housing 22. The first vertical movement mechanism 20 includes a guide 26 extending in the vertical direction and a slider 27 that moves along the guide 26, and the slider 27 is coupled to the jig 18 via the bearing 19. Thereby, the convex spherical pedestal 17 is movable in the vertical direction.

  The pushing mechanism 21 maintains a state in which the convex spherical pedestal 17 is pressed against the shaft workpiece W with a predetermined force. The push-in mechanism 21 is accommodated in the housing 22 and is connected to the slider 27. The pushing mechanism 21 may be any mechanism that can maintain the state in which the convex spherical pedestal 17 is pressed against the shaft workpiece W with a predetermined force. For example, an air cylinder or the like can be used.

  Here, it is preferable that the 1st support part 5 is movable to an up-down direction. Therefore, the measuring apparatus 1 of the present embodiment includes a second vertical movement mechanism 28 of the first support portion 5 as shown in FIG.

  The configuration of the second vertical movement mechanism 28 is not particularly limited as long as the first support unit 5 can be moved in the vertical direction. For example, the column 29 erected on the base 2 extends in the vertical direction. Further, the guide 30 provided in the column 29, the slider 31, which is connected to the casing 22 of the first support portion 5 and moves along the guide 30, the vertical movement means 32, and the position of the slider 31 are fixed. A locking mechanism (not shown) is provided. The second vertical movement mechanism 28 may be configured to move the first support 5 in the vertical direction using a driving unit, or may be configured to manually move the first support 5 in the vertical direction. .

  Incidentally, as shown in FIG. 2, the column 29 is preferably provided with a holding portion 35 for holding the replacement probe 34. Accordingly, the probe can be easily exchanged by controlling the coordinate measuring machine 4.

  As shown in FIG. 7, the second support portion 6 includes a convex spherical base 36 and a jig 37. The convex spherical pedestal 36 includes a sphere 38 and an insertion portion 39. As shown in FIG. 8, the sphere 38 is fitted in a recess W1 formed on the other end surface in the longitudinal direction of the shaft workpiece W when measuring the surface property of the shaft workpiece W, for example, the inclination of the recess W1. Touch the surface. The insertion portion 39 is a tapered rod-shaped member that decreases in diameter toward the lower side, and a sphere 38 is connected to the upper end portion.

  The jig 37 is a rod-like member extending in the vertical direction, and is erected on the rotary table 8. In the jig 37, a hole 37a corresponding to the insertion portion 39 is formed in the vertical direction, and the insertion portion 39 is inserted into the hole 37a from above. At this time, the center of the sphere 38 is arranged on the rotation axis of the turntable 8. Thus, the convex spherical pedestal 36 can be attached to and detached from the jig 37 by adopting a configuration in which the insertion portion 39 can be inserted into the jig 37. Therefore, the convex spherical pedestal 36 having a different diameter of the sphere 38 can be exchanged according to the size of the recess W1 formed on the other end surface in the longitudinal direction of the shaft workpiece W.

  Next, a flow of measuring the surface property of the workpiece workpiece W using the measuring apparatus 1 of the present embodiment will be described. First, the longitudinal direction of the shaft workpiece W is arranged in the vertical direction, and the sphere 38 of the second support portion 6 is fitted in the recess W1 formed on the other end surface of the shaft workpiece W in the longitudinal direction. At this time, the first support portion 5 is moved upward by the second vertical movement mechanism 28 and the jig 18 is moved upward by the first vertical movement mechanism 20.

  Next, in a state where the jig 18 is moved upward, the slider 31 of the second vertical movement mechanism 28 is moved downward to a specified height position for each shaft workpiece W, and one of the longitudinal workpieces W in the longitudinal direction is moved. The sphere 23 of the first support portion 5 is fitted into the recess W1 formed on the end surface of the first end portion, and the state is fixed by the lock mechanism of the second vertical movement mechanism 28.

  Next, the jig 18 is moved downward by the pushing mechanism 21 and the first vertical movement mechanism 20, and the sphere 23 of the first support portion 5 is moved to one end surface in the longitudinal direction of the shaft workpiece W with a predetermined force. It pushes into the formed recessed part W1, and it maintains in the state. Thereby, during the measurement of the surface property of the shaft workpiece W, the shaft workpiece W can be pushed in with a predetermined force.

  Next, the processing device 15 controls the coordinate measuring machine 4 to move the probe 14 along the shaft workpiece W. At that time, the probe 14 outputs a measurement signal to the processing device 15. Then, the processing device 15 derives the surface texture of the shaft workpiece W based on the measurement signal input from the probe 14.

  Next, in order to measure the surface property of the region of the shaft workpiece W that could not be measured in the measurement process by the above-described coordinate measuring machine 4, the rotary table 8 is rotated, and the processing device 15 again performs the three-dimensional measurement. The machine 14 is controlled to move the probe 14 along the shaft workpiece W, and the surface properties of the shaft workpiece W are derived.

  The measurement of the surface property of the shaft workpiece W is completed by repeating the process of rotating the rotary table 8 and measuring the surface property of the region of the shaft workpiece W that could not be measured as necessary.

  As described above, in this embodiment, the shaft workpiece W is supported by the sphere 23 and the sphere 38. At this time, even if the shaft workpiece W is tilted and supported, the distance from the center O1 of the sphere 23 to the contact point with the recess W1 formed on one end surface in the longitudinal direction of the shaft workpiece W, and the center of the sphere 38 The distance from O2 to the contact point with the recess W1 formed on the other end face in the longitudinal direction of the shaft workpiece W is always the radial length of the sphere 23 and the sphere 38, and the inclination of the center line of the shaft workpiece W is The slope of the line connecting the center O1 of the sphere 23 and the center O2 of the sphere 38 is substantially the same. Therefore, the inclination of the shaft workpiece W can be detected with high accuracy based on the positions of the center O1 of the sphere 23 and the center O2 of the sphere 38, and therefore the surface property of the shaft workpiece W can be measured with high accuracy.

  The centers O1 and O2 of the spheres 23 and 38 are obtained from the results of measuring the spheres 23 and 38. Every time the turntable 8 is rotated, the spherical surfaces of the spheres 23 and 38 are measured at four locations, and the centers O1 and O2 of the spheres 23 and 38 are obtained, thereby increasing the measurement accuracy.

  Further, when measuring the surface properties of a new workpiece workpiece W, the jig 18 is moved to the first vertical movement mechanism 20 and the first vertical movement mechanism 20 without moving the first support portion 5 by the second vertical movement mechanism 28. The surface property of a new shaft workpiece W can be measured simply by moving it with the pressing mechanism 21. At this time, the shaft mechanism W is absorbed by the pressing mechanism 21 while the length difference of the shaft workpiece W is absorbed. Can be pushed in with force.

  The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  In the above-described embodiment, the shaft workpiece W is supported using a sphere, but the portion in contact with the shaft workpiece W may be at least a spherical surface.

  Further, the sphere may be provided on the shaft workpiece W side, and the bearing portion (dent portion) that supports the sphere may be provided on the support portion side that supports the shaft workpiece W.

  Furthermore, the bearing portion that supports the sphere is not limited to the concave shape, and may be configured to receive a sphere on three hemispherical protrusions or three planes, for example.

  In the above-described embodiment, the probe 14 is moved in the three-dimensional direction using the left-right direction driving mechanism 10, the vertical direction driving mechanism 11, and the front-rear direction moving mechanism 12. However, for example, the probe 14 is moved using a robot arm or the like. It may be moved in the three-dimensional direction.

  In the above-described embodiment, the pushing mechanism 21 is provided in the first support portion 5, but the pushing mechanism may be provided in the second support portion 6 and the shaft workpiece W may be pushed upward with a predetermined force.

  In the above-described embodiment, the surface property of the shaft workpiece W is measured by moving the probe 14 in the three-dimensional direction using the three-dimensional measuring machine 4, but the shaft workpiece W and the probe 14 are measured in the three-dimensional direction. The shaft workpiece W may be moved in a three-dimensional direction as long as it can be moved relative to the other.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 2 Base part 3 Support mechanism 4 CMM 5 1st support part 6 2nd support part 7 Anti-rotation part, 7a Standing member, 7b Arm 8 Rotary table 10 Left-right direction drive mechanism 11 Vertical direction drive mechanism 12 Front / rear direction drive mechanism 13 Probe head 14 Probe 15 Processing device 16 Case, 16a Movement allowance part 17 Convex spherical base, 23 Sphere, 24 Insertion part 18 Jig, 18a Hole, 18b Through hole, 18c Hook 20 First vertical direction Movement mechanism, 26 guide, 27 Slider 21 Pushing mechanism 22 Housing 25 Wire 28 Second vertical movement mechanism, 29 Column, 30 guide, 31 Slider, 32 Vertical movement means 34 Replacement probe 35 Holding part 36 Convex shape Spherical pedestal, 38 sphere, 39 insertion portion 37 jig, 37a hole a cone G center of gravity O1, O2 of the cone Center W Shaft object W1 Recess

Claims (5)

A first support portion for supporting an upper end portion of a shaft object work in which a longitudinal direction is arranged substantially in a vertical direction;
A second support part disposed below the first support part and supporting a lower end part of the shaft object work;
A measuring machine comprising a probe for measuring the surface properties of the shaft object work supported by the first support part and the second support part;
A Ru measuring apparatus comprising a,
The first support part and the second support part are provided on a convex spherical pedestal that is fitted in a recess provided on a longitudinal end face of the shaft object work, or on a longitudinal end face of the shaft object work. A recess into which the sphere is fitted,
As the first support portion moves in a substantially vertical direction, the convex spherical pedestal or the concave portion provided in the first support portion is movable only in a substantially vertical direction .   The measuring apparatus according to claim 1, further comprising a rotation prevention unit that prevents rotation of the shaft workpiece. It said first support part, pushing the shaft-like workpiece toward a substantially downward, measuring device according to claim 1 or 2 comprising a push portion for maintaining the push state.   The measuring apparatus according to claim 1, wherein the second support portion includes a pushing portion that pushes the shaft workpiece work substantially upward and maintains the pushed state. Measurement device according to any one of claims 1 to 4 wherein the measuring is a coordinate measuring machine.

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