JP2011208994A - Roundness measuring machine - Google Patents

Abstract

A roundness measuring machine capable of further improving work efficiency is provided.
A roundness measuring machine includes a stylus stocker 50 that accommodates a plurality of types of styluses 31 that are prepared corresponding to the measurement site of a workpiece W and that can be stored therein, and a control device 60. . The control device, when given with a measurement command, controls the operation of the rotation drive mechanism 23 and the detector drive mechanism 40 of the turntable 20 while measuring the roundness of the object to be measured, and a stylus. When the automatic exchange command is given, the stylus exchange execution means for executing the stylus exchange operation between the detector 30 and the stylus stocker while controlling the detector driving mechanism, and the detector automatic gain calibration command are given. At this time, a gain adjustment means is provided that applies a preset set displacement amount to the stylus and calibrates the detector gain from the stylus displacement detected by the detector and the set displacement amount.
[Selection] Figure 1

Description

  The present invention relates to a roundness measuring machine. More specifically, the present invention relates to a roundness measuring machine having an automatic stylus exchange function and an automatic gain calibration function of a detector.

A roundness measuring machine is known as a measuring machine that measures the roundness of an object to be measured.
The roundness measuring machine includes a base, a rotary table provided on the base so as to be rotatable about a vertical axis, and a measurement object placed on the upper surface, a rotary drive mechanism for rotating the rotary table, and a base A column that is erected on the column, a lift slider that is vertically movable along the column, a slide arm that is slidable in a direction perpendicular to the vertical axis on the lift slider, And a detector that outputs a displacement of a stylus that is attached to the tip of the slide arm and is in contact with the object to be measured as an electrical signal (see, for example, Patent Document 1).

When using a roundness measuring machine, in addition to a normal stylus, various styluses that match the shape of the part being measured are prepared in advance, making it suitable for the shape of the part being measured. After replacing the stylus, measure. For example, when measuring the roundness of the deep hole of the object to be measured, replace it with a deep hole stylus with a long stylus length, or replace it with a groove stylus when measuring the roundness in the groove. Then, measure.
Since the stylus replacement work is conventionally performed by a measurer, the measurement work is interrupted for a long time, and the burden on the measurer associated with the stylus removal work and mounting work is large.

Therefore, the present applicant has previously proposed a roundness measuring machine capable of automatically exchanging a stylus (see Patent Document 2).
The roundness measuring machine having the above-described configuration is provided with a stylus stocker that accommodates a plurality of types of styluses prepared corresponding to the measurement site of the object to be measured, and a control device. ing. The control device performs the roundness measurement of the object under measurement while controlling the operation of the rotation drive mechanism, the lifting slider and the slide arm when the measurement command is given, and when the stylus exchange command is given, A stylus exchange operation is executed between the detector and the stylus stocker while controlling the operations of the lift slider and the slide arm.

Japanese Patent Laid-Open No. 2004-233131 Japanese Patent Application No. 2009-124037

The roundness measuring machine has an automatic stylus replacement function, which enables automatic stylus replacement, improving work efficiency and reducing the burden on the measurer. Remains.
For example, when the stylus is replaced with a stylus having a different length, it is necessary to calibrate the gain of the detector. Conventionally, detector gain calibration work has been performed using a calibration jig with a predetermined step formed by combining gauge blocks, or a calibration master with a flat notch formed on a part of the outer periphery of the disk. Proofreading work.

Specifically, the measurement person sets a calibration jig or calibration master on the rotary table of the roundness measuring machine, and measures the step or notch of the calibration jig or calibration master with a detector. Then, the gain of the detector is calibrated from the measured value and the level difference or notch amount. After the gain calibration of the detector is completed, the calibration jig and the calibration master are removed from the rotary table, the measurement object is set on the rotary table, and the measurement work is performed.
For this reason, even if the work efficiency can be improved by the automatic stylus exchange function, it takes time and labor to calibrate the gain of the detector, and thus further improvement of the work efficiency is desired.

  An object of the present invention is to provide a roundness measuring machine capable of meeting such demands and further improving work efficiency.

  A roundness measuring machine according to the present invention includes a base, a rotary table provided on the base so as to be rotatable about a vertical axis, and an object to be measured placed on the upper surface, and a rotation drive mechanism for rotating the rotary table, A detector having a stylus in contact with the object to be measured and a detector body that detachably mounts the stylus and outputs a displacement of the stylus as an electrical signal; and the detector orthogonal to the vertical axis and In a roundness measuring machine having a first movement direction approaching and separating from the rotary table and a detector driving mechanism for driving in a second movement direction parallel to the vertical axis, A stylus stocker that accommodates a plurality of types of styli prepared in a storable and retractable manner, and a control device, and the control device receives a measurement command. Measurement execution means for measuring the roundness of the object to be measured while controlling the operations of the rotation drive mechanism and the detector drive mechanism, and the detection when the stylus automatic replacement command is given. A stylus exchange execution means for executing a stylus exchange operation between the detector and the stylus stocker while controlling a device drive mechanism, and a detector automatic gain calibration command are given to the stylus when preset. Gain adjustment means for applying a set displacement amount and calibrating the gain of the detector from the displacement of the stylus detected by the detector and the set displacement amount is provided.

According to such a configuration, when a measurement command is given, the detector stylus is brought into contact with the object to be measured by the operation of the detector driving mechanism, and in this state, the rotary table is driven to rotate, Measurements such as the roundness of the measurement object are performed.
When the stylus automatic replacement command is given, the stylus replacement operation is executed between the detector and the stylus stocker by the operation of the detector driving mechanism. Therefore, if the stylus replacement operation is instructed according to the measurement site shape of the object to be measured, the stylus replacement operation is automatically executed between the detector and the stylus stocker, so the measurement operation is interrupted. Can be done continuously without. Therefore, the burden on the measurer can be reduced and the measurement work can be made more efficient.
Further, when a detector automatic gain calibration command is given, a preset displacement amount is given to the stylus, and the gain of the detector is calibrated from the stylus displacement and the set displacement amount detected by the detector. Therefore, if the detector automatic gain calibration command is given after the stylus replacement operation, the detector gain calibration operation is automatically executed after the stylus replacement operation. In addition, the gain calibration operation of the detector can be performed continuously and automatically without interrupting the measurement operation. Therefore, the burden on the measurer can be reduced and the measurement work can be made more efficient.

  In the roundness measuring machine according to the present invention, the rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, and a disk on which an object to be measured is placed on an upper surface of the main body. And a mounting plate moving mechanism for moving the mounting plate in a direction orthogonal to the vertical axis, and the gain adjusting means moves the mounting plate moving mechanism. The rotary drive mechanism is operated to rotate the rotary table so that the direction coincides with the first movement direction, and then the detector drive mechanism is operated so that the stylus of the detector is placed on the mounting plate. In this state, the displacement of the stylus detected by the detector when the mounting plate moving mechanism is moved by a preset set displacement amount is taken in this state. Like quantity Calibrating the gain of the detector, it is preferable.

According to such a configuration, when the gain of the detector is calibrated, first, the rotation drive mechanism is operated and the rotary table is rotated so that the movement direction of the mounting plate movement mechanism coincides with the first movement direction.
Next, after the detector driving mechanism is operated and the stylus of the detector is brought into contact with the side surface of the mounting plate, in this state, the mounting plate moving mechanism is moved by a preset set displacement amount. At this time, the displacement of the stylus detected by the detector is taken in, and the gain of the detector is calibrated from this displacement amount and the set displacement amount.
Therefore, since it is not necessary to use a conventional calibration jig or calibration master, there is no work associated with setting and removing from the rotary table, and the measurement work can be made more efficient.

  In the roundness measuring machine according to the present invention, the rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, and a disk on which an object to be measured is placed on an upper surface of the main body. The gain adjusting means operates the detector driving mechanism to bring the stylus of the detector into contact with the side surface of the mounting plate. In this state, the detector The displacement of the stylus detected by the detector when the drive mechanism is moved in the first movement direction by a preset set displacement amount is captured, and the displacement of the detector is determined from the displacement amount and the set displacement amount. It is preferable to calibrate the gain.

According to such a configuration, when the gain of the detector is calibrated, first, the detector driving mechanism is operated and the detector stylus is brought into contact with the side surface of the mounting plate. It is moved by a preset displacement amount. At this time, the displacement of the stylus detected by the detector is taken in, and the gain of the detector is calibrated from this displacement amount and the set displacement amount.
Therefore, similarly to the above, since it is not necessary to use a conventional calibration jig or calibration master, there is no work associated with setting and removing from the rotary table, and the measurement work can be made more efficient. In particular, according to this configuration, there is no need for a mounting plate moving mechanism, and it is necessary to rotate the rotary table by operating the rotation driving mechanism so that the moving direction of the mounting plate moving mechanism matches the first moving direction. Therefore, it can be simplified and speeded up.

  In the roundness measuring machine according to the present invention, the rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, and a disk on which an object to be measured is placed on an upper surface of the main body. A mounting plate and a mounting plate moving mechanism that moves the mounting plate in a direction orthogonal to the vertical axis, and a part of the outer periphery of the mounting plate includes an outer periphery. A notch having a notch depth corresponding to the set displacement amount is formed, and the gain adjusting means operates the detector driving mechanism to bring the stylus of the detector into contact with the side surface of the mounting plate, In this state, it is preferable to take in the displacement of the stylus detected by the detector when the rotational drive mechanism is operated, and calibrate the gain of the detector from the displacement amount and the set displacement amount. .

According to such a configuration, when the gain of the detector is calibrated, first, the detector driving mechanism is operated and the stylus of the detector is brought into contact with the side surface of the mounting plate, and in this state, the rotational driving mechanism is driven. Let Then, the notch formed in a part of the outer periphery of the mounting plate is detected by the detector. That is, the displacement of the stylus of the detector is taken in, and the gain of the detector is calibrated from this displacement amount and the set displacement amount.
Therefore, in this configuration as well, the conventional calibration jig and calibration master do not have to be used, so there is no work associated with setting and removing the work on the rotary table, and the measurement work is more efficient. Since there is no need for a mounting plate moving mechanism, and there is no need to rotate the rotary table by operating the rotation drive mechanism so that the moving direction of the mounting plate moving mechanism matches the first moving direction. It can be simplified and speeded up.

  In the roundness measuring machine according to the present invention, the stylus stocker is disposed outside a measurement region determined by a moving range of the rotary table and the detector driving mechanism, and the detector driving mechanism is erected on the base. A column, a lift drive mechanism for driving the lift slider in the vertical direction with respect to the column, and a slide arm perpendicular to the vertical axis with respect to the lift slider and approaching and separating from the rotary table A first slide drive mechanism that drives in a direction to move, a second slide drive mechanism that is provided at the tip of the slide arm and slides the detector in a direction perpendicular to the slide axis of the slide arm, and the second slide A turning drive mechanism for turning the drive mechanism about the slide axis of the slide arm, and the second slide The operation of the driving mechanism and the swiveling drive mechanism, wherein the detector is configured to be moved out of the measuring area, it is preferable.

According to such a configuration, since the stylus stocker is arranged outside the measurement region determined by the moving range of the rotary table and the detector driving mechanism, the stylus stocker does not limit the measurement region.
The detector drive mechanism includes a second slide drive mechanism that is provided at the tip of the slide arm and slides the detector in a direction orthogonal to the slide axis of the slide arm, and the second slide drive mechanism is slid on the slide arm. Since the swivel drive mechanism that swivels about the axis is included, first, the swivel drive mechanism turns the second slide drive mechanism 90 degrees about the slide axis of the slide arm to change the attitude of the detector horizontally. After that, the detector is slid in the direction orthogonal to the slide axis of the slide arm by the second slide drive mechanism. Then, since the detector is moved to the stylus stocker arranged outside the measurement area, the detector is arranged outside the measurement area with a relatively simple configuration without hindering the roundness measurement operation. You can approach the stylus stocker.

The perspective view of the roundness measuring machine which concerns on embodiment of this invention. The top view of embodiment same as the above. The figure which shows the detector main body and stylus of embodiment same as the above. The perspective view which shows the 2nd slide drive mechanism of embodiment same as the above. The side view which shows operation | movement of the turning drive mechanism of embodiment same as the above. The perspective view which shows a measurement area | region in embodiment same as the above. The block diagram which shows the control apparatus and its peripheral mechanism of embodiment same as the above. The figure which shows stylus exchange operation | movement in embodiment same as the above. The figure which shows detector automatic gain calibration operation | movement in embodiment same as the above. The perspective view of the roundness measuring machine which concerns on the modification of this invention. The figure which shows a detector automatic gain calibration operation | movement in a modification same as the above.

<Description of roundness measuring machine>
FIG. 1 is a perspective view showing a roundness measuring machine of this embodiment, and FIG. 2 is a plan view of the roundness measuring machine.
As shown in these drawings, the roundness measuring machine according to the present embodiment is provided with a base 10 and a workpiece W on the upper surface provided on one side of the base 10 so as to be rotatable about a vertical axis L. The rotary table 20 to be placed, the detector 30, and the detector drive for driving the detector 30 in the direction perpendicular to the vertical axis L and the direction perpendicular to the vertical axis L and in the direction approaching and separating from the rotary table 20. A mechanism 40, a stylus stocker 50 that accommodates a plurality of types of stylus 31 prepared corresponding to the measurement site of the workpiece W so as to be removable and retractable, and a control device 60 are provided.

The turntable 20 is structured to be rotated by a rotation drive mechanism 23, and is provided with a cylindrical main body 21 rotatably installed on the base 10 and an upper portion of the main body 21 so as to be movable in an orthogonal direction in a horizontal plane. A disk-shaped mounting plate 22 for mounting the workpiece W on the upper surface, and a mounting plate X-axis moving mechanism 24 for moving the mounting plate 22 in the X and Y axis directions orthogonal to the vertical axis L. The mounting plate Y-axis moving mechanism 25, and the mounting plate X-axis tilting mechanism 26 and the mounting plate X-axis tilting mechanism 27 for adjusting the tilt of the mounting plate 22 in the X and Y axis directions are configured. .
The rotational drive mechanism 23 is configured by a motor that rotationally drives the rotary table 20, or a mechanism that transmits rotation from the motor to the rotary table 20 via a speed reducer. The mounting plate X-axis moving mechanism 24 and the mounting plate Y-axis moving mechanism 25 include a motor, and are configured to slide the mounting plate 22 in the X and Y axis directions by driving the motor. The mounting plate X-axis tilt mechanism 26 and the mounting plate X-axis tilt mechanism 27 include a motor, and have a structure in which the mounting plate 22 is tilted in the X and Y axis directions by driving the motor.

  As shown in FIG. 3, the detector 30 has a stylus 31 in contact with the object W to be measured, and a stylus 31 that is detachably attached to the stylus 31 (displacement in a direction perpendicular to the longitudinal direction of the stylus 31). And a detector main body 32 for detecting as an electrical signal. The stylus 31 includes a stylus main body 31A having a predetermined length, a stylus 31B attached to the tip of the stylus main body 31A, and an engagement groove 31C formed at a base portion of the stylus main body 31A. The detector main body 32 is provided with a support piece 32A and a leaf spring 32B disposed opposite to the support piece 32A, and a base portion of the stylus 31 can be inserted between the support piece 32A and the leaf spring 32B. And it is detachable, that is, is detachably mounted.

  The detector drive mechanism 40 includes a column 41 erected on the other side of the base 10, a lift drive mechanism 43 that drives the lift slider 42 in the vertical direction (Z-axis direction) with respect to the column 41, and a lift slider A first slide drive mechanism 45 for driving the slide arm 44 in a direction perpendicular to the vertical axis with respect to 42 and a direction approaching and separating from the rotary table 20 (X-axis direction); And a second slide drive mechanism 46 that slides the detector 30 in a direction orthogonal to the slide axis of the slide arm 44 and a swing drive that rotates the second slide drive mechanism 46 about the slide axis of the slide arm 44. And a mechanism 47.

Although the lifting drive mechanism 43 is not shown, any structure may be used as long as it can drive the lifting slider 42 in the vertical direction. For example, a feed mechanism having a ball screw shaft erected on the column 41 in the vertical direction, a motor that rotates the ball screw shaft, and a nut member that is screwed to the ball screw shaft and connected to the lift slider 42. Good.
The first slide drive mechanism 45 is not shown, but any mechanism can be used as long as it can drive the slide arm 44 in a direction orthogonal to the vertical axis L and in a direction approaching and separating from the rotary table 20. It may be a simple structure. For example, a configuration in which a rack is formed along the longitudinal direction of the slide arm 44, a pinion that meshes with the rack, a motor that rotates the pinion, and the like are provided in the elevating slider 42 may be employed.

  As shown in FIG. 4, the second slide drive mechanism 46 includes a case member 46A attached at right angles to the tip of the slide arm 44, a ball screw shaft 46B rotatably provided in the case member 46A, The feed mechanism includes a motor 46C that rotates the ball screw shaft 46B, a nut member 46D that is screwed to the ball screw shaft 46B, and a detector holding portion 46E that includes the nut member 46D and holds the detector 30. Has been. The second slide drive mechanism 46 is not limited to the configuration shown in FIG.

  The turning drive mechanism 47 is, for example, a turning shaft (not shown) provided rotatably inside the slide arm 44 and having a distal end coupled to the case member 46A of the second slide drive mechanism 46, and a base end of the turning shaft. The motor 47B is provided and drives the turning shaft to turn. In the present embodiment, as shown in FIG. 5, the attitude of the detector 30 in which the stylus 31 heads in the vertical direction is set to 0 degree, and the attitude of the detector 30 can be changed in a range of −90 degrees to +90 degrees. Yes.

  In addition to the measurement area (measurement area A shown in FIG. 6) determined by the movement range of the rotary table 20 and the detector drive mechanism 40, the stylus stocker 50 is more specifically shown in FIG. The detector 30 is arranged on the back side of the base 10 with the slide axis of the slide arm 44 interposed therebetween, and the detector 30 is movable to the position of the stylus stocker 50. In the present embodiment, the detector 30 is configured to be movable out of the measurement region A by the operations of the second slide drive mechanism 46 and the turning drive mechanism 47.

  2 and 5, the stylus stocker 50 is an L-shaped stocker disposed on the back side of the base 10 with the slide axis of the slide arm 44 between the rotary table 20 and the column 41. The main body 51 and a plurality of stylus holding portions 53 are formed at regular intervals in the vertical direction of the upright pieces 52 of the stocker main body 51. The stylus holding portion 53 is formed by a substantially semicircular groove, and the engaging groove 31C of the stylus 31 is accommodated in the groove so as to be removable and retractable. Here, in addition to the standard stylus 31, styluses 31 having different lengths are accommodated.

<Description of control system>
As shown in FIG. 7, the present control system includes a control device 60, an input device 61, a display device 62, a storage device 63, and the like.
The storage device 63 is provided with a program storage unit 63A that stores a measurement program, a stylus automatic replacement program, a detector automatic gain calibration program, and a data storage unit 63B that stores measurement data captured during measurement. Yes.
In addition to the input device 61, the display device 62, and the storage device 63, the control device 60 includes a rotation drive mechanism 23, a placement plate X-axis movement mechanism 24, a placement plate Y-axis movement mechanism 25, and a placement plate X-axis tilt. The mechanism 26, the mounting plate Y-axis tilting mechanism 27, the elevation drive mechanism 43, the first slide drive mechanism 45, the second slide drive mechanism 46, the turning drive mechanism 47, the detector 30 and the like are connected. The control device 60 controls the driving of each mechanism according to a measurement program, a stylus automatic exchange program, a detector automatic gain calibration program, etc. stored in the program storage unit 63A, and takes in a signal from the detector 30. It has a function to process.

  Specifically, when a measurement command is given, a measurement execution unit that measures the roundness of the workpiece W while controlling the operation of the rotation drive mechanism 23 and the detector drive mechanism 40, a stylus automatic When an exchange command is given, a stylus exchange execution means for executing a stylus exchange operation between the detector 30 and the stylus stocker 50 while controlling the detector drive mechanism 40, and a detector automatic gain calibration command are given. At this time, there is provided gain adjusting means for applying a preset displacement amount to the stylus 31 and calibrating the gain of the detector 30 from the displacement of the stylus 31 detected by the detector 30 and the set displacement amount.

  Here, the gain adjusting means operates the rotation drive mechanism 23 so that the moving direction of the mounting plate X-axis moving mechanism 24 or the mounting plate Y-axis moving mechanism 25 coincides with the X-axis direction (first moving direction). After rotating the rotary table 20, the detector driving mechanism 40 is operated to bring the stylus 31 of the detector 30 into contact with the side surface of the mounting plate 22. In this state, the mounting plate X-axis moving mechanism 24 or The displacement of the stylus 31 detected by the detector 30 when the mounting plate Y-axis moving mechanism 25 is moved by a preset set displacement amount is captured, and the gain of the detector 30 is calculated from this displacement amount and the set displacement amount. The operation to calibrate is automatically performed.

<Description of stylus replacement operation>
When a stylus automatic replacement command is given to the control device 60 by the stylus automatic replacement program stored in the program storage unit 63A, the detector driving mechanism 40 is driven. That is, the detector 30 is moved by the driving of the elevating drive mechanism 43, the first slide drive mechanism 45, the second slide drive mechanism 46, and the turning drive mechanism 47, and the stylus exchange operation between the detector 30 and the stylus stocker 50. Is executed.

  Now, when the stylus 31 is attached to the detector 30 and the stylus automatic replacement command is given, the detector 30 is rotated by +90 degrees by driving the turning drive mechanism 47 as shown in FIG. Set to posture. After that, the detector 30 is positioned at the height position of the stylus holding portion 53 of the stylus stocker 50 to be stored by the driving of the elevating drive mechanism 43, and then the following operation is executed.

(A) By driving the second slide drive mechanism 46, the detector 30 is moved in the Y-direction, and the engagement groove 31C of the stylus 31 is moved to a position corresponding to the stylus holding portion 53 of the stylus stocker 50.
(B) When the first slide drive mechanism 45 is driven, the detector 30 is moved in the X + direction. Then, the engagement groove 31 </ b> C of the stylus 31 is accommodated in the stylus holding portion 53 of the stylus stocker 50.
(C) By driving the second slide drive mechanism 46, the detector 30 is moved in the Y + direction. Then, the detector main body 32 moves in the Y + direction while leaving the stylus 31 in the stylus stocker 50, so that the stylus 31 of the detector main body 32 is stored in the stylus stocker 50.

Next, when a new stylus 31 is to be attached to the detector main body 32, after the detector main body 32 is positioned at the new stylus 31, the following operation is performed.
(D) By driving the second slide drive mechanism 46, the detector 30 is moved in the Y-direction. Then, a new stylus 31 is inserted into the detector main body 32. That is, a new stylus 31 is attached to the detector main body 32.
(E) By driving the first slide drive mechanism 45, the detector 30 is moved in the X-direction. Then, the engaging groove 31 </ b> C of the stylus 31 is detached from the stylus holding portion 53 of the stylus stocker 50.
(F) By driving the second slide drive mechanism 46, the detector 30 is moved in the Y + direction and returned to the original position. After that, after the detector 30 is turned to a vertical posture by driving the turning drive mechanism 47, the detector automatic gain calibration operation is executed.

<Explanation of detector automatic gain calibration operation>
When a detector automatic gain calibration command is given to the control device 60 by the detector automatic gain calibration program stored in the program storage unit 63A, the mounting plate X-axis moving mechanism 24 (or the mounting plate Y-axis moving mechanism 25). The rotation drive mechanism 23 is operated and the turntable 20 is rotated so that the movement direction of the rotation table coincides with the X-axis direction (first movement direction).
Thereafter, as shown in FIG. 9A, the detector driving mechanism 40 is driven, and the stylus 31 of the detector 30 is brought into contact with the side surface of the mounting plate 22.
In this state, as shown in FIG. 9B, the placement plate 22 is moved in the X-axis direction by a preset set displacement amount by the placement plate X-axis moving mechanism 24. Then, the movement amount at this time is detected by the detector 30. That is, the displacement amount of the stylus 31 of the detector 30 is captured and sent to the control device 60.
In the control device 60, the gain of the detector 30 is calibrated from the taken displacement amount and the set displacement amount. For example, in the control device 60, detection is performed by adjusting the gain of a circuit (such as a DA converter) that receives the output from the detector 30 so that the displacement amount of the captured stylus 31 approximates the set displacement amount. The gain of the device 30 is calibrated. Alternatively, the gain of the detector 30 is calibrated by taking the displacement signal from the detector 30 into a control device such as a PC (personal computer) and adjusting the taken value so that the taken value matches the set displacement amount. .
Thereafter, the measurement operation is executed.

<Description of measurement operation>
When a measurement command is given to the control device 60 by the measurement program stored in the program storage unit 63A, the detector driving mechanism 40 is driven. That is, by driving the lifting drive mechanism 43 and the first slide drive mechanism 45, the detector 30 is moved in a direction approaching the object W to be measured, and the stylus 31 of the detector 30 is brought into contact with the object W to be measured.
In this state, the rotary table 20 is driven to rotate. Then, since the stylus 31 of the detector 30 is displaced according to the roundness of the workpiece W, the displacement of the stylus 31 is detected as an electric signal by the detector main body 32 and then taken into the control device 60. It is. The control device 60 stores the acquired measurement data in the data storage unit 63B, calculates the roundness from the data, displays the result on the display device 62, and prints it out as necessary. .

<Effect of embodiment>
(1) When an automatic stylus replacement command is given, a stylus replacement operation is performed between the detector main body 32 and the stylus stocker 50 by the operation of the detector drive mechanism 40.
Therefore, if the stylus replacement operation is commanded according to the shape of the measurement site of the workpiece W, the stylus replacement operation is automatically executed between the detector main body 32 and the stylus stocker 50. Measurement can be performed continuously without interruption. Therefore, the burden on the measurer can be reduced and the measurement work can be made more efficient.

(2) When a detector automatic gain calibration command is given, a preset set displacement amount is given to the stylus 31, and the gain of the detector 30 is determined from the displacement of the stylus 31 detected by the detector 30 and the set displacement amount. Is calibrated.
Accordingly, if the detector automatic gain calibration command is given after the stylus exchange operation, the gain calibration operation of the detector 30 is automatically executed after the stylus 31 exchange operation. The exchange operation and the gain calibration operation of the detector 30 can be performed continuously and automatically without interrupting the measurement operation. Therefore, the burden on the measurer can be reduced and the measurement work can be made more efficient.

(3) When a measurement command is given, the stylus 31 of the detector 30 is brought into contact with the workpiece W by the operation of the detector driving mechanism 40, and in this state, the rotary table 20 is rotated, Measurement such as the roundness of the workpiece W is performed.
Therefore, since the automatic stylus exchange operation, the automatic detector gain calibration operation, and the measurement operation are continuously performed, further improvement in work efficiency can be expected.

(4) The stylus stocker 50 is disposed outside the measurement area A determined by the movement range of the rotary table 20 and the detector drive mechanism 40, and the detector drive mechanism 40 moves the detector 30 outside the measurement area. Since it is configured to be possible, the stylus stocker 50 does not limit the measurement area.

(5) The detector drive mechanism 40 includes a second slide drive mechanism 46 provided at the tip of the slide arm 44 and configured to slide the detector 30 in a direction orthogonal to the slide axis of the slide arm 44, and a second slide drive. A turning drive mechanism 47 that turns the mechanism 46 about the slide axis of the slide arm 44 is included. First, the turning drive mechanism 47 moves the second slide drive mechanism 46 about the slide axis of the slide arm 44. The detector 30 is rotated in the horizontal direction, and then the detector 30 is slid in a direction perpendicular to the slide axis of the slide arm 44 by the second slide drive mechanism 46. It is moved to the stylus stocker 50 arranged outside A. Therefore, the detector 30 can be approached to the stylus stocker 50 arranged outside the measurement region A with a relatively simple configuration without hindering the roundness measurement operation.

(6) Since the stylus stocker 50 is disposed between the rotary table 20 and the column 41 on the back side of the base 10 across the slide axis of the slide arm 44, the field of view seen from the front side of the base 10 is Since there is no obstruction, the operator can perform the measurement work while visually confirming the measurement work.

(7) Since the attitude of the detector 30 in which the stylus 31 is directed in the vertical direction is set to 0 degree and the attitude of the detector 30 can be changed in a range of −90 degrees to +90 degrees, for example, the detector 30 If the stylus replacement operation can be performed when the posture is +90 degrees, the roundness of the object to be measured can be measured when the detector 30 is at a posture of −90 degrees. Therefore, measurement can be performed by appropriately changing the attitude of the detector according to the shape of the object to be measured.

<Modification>
The present invention is not limited to the above-described embodiments, and modifications, improvements and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, when the detector automatic gain calibration command is given to the control device 60, the moving direction of the mounting plate X-axis moving mechanism 24 or the mounting plate Y-axis moving mechanism 25 is the X-axis direction (first moving direction). After the rotary table 20 is rotated so as to coincide with the position, the mounting plate X-axis moving mechanism 24 or the mounting plate Y-axis movement is performed in a state where the stylus 31 of the detector 30 is in contact with the side surface of the mounting plate 22. Although the gain of the detector 30 is calibrated by moving the mechanism 25 by a preset set displacement amount, the present invention is not limited to this.
For example, in the state of FIG. 9B, the first slide drive mechanism 45 is moved only by the set displacement amount instead of moving the mounting plate X axis moving mechanism 24 or the mounting plate Y axis moving mechanism 25 by the set displacement amount. It may be moved.

Alternatively, the roundness measuring machine may be configured as shown in FIG. 10, and the detector calibration operation may be performed as shown in FIG.
In the roundness measuring machine shown in FIG. 10, a notch 22 </ b> A in which a notch depth from the outer periphery corresponds to a set displacement amount is formed in a part of the outer periphery of the mounting plate 22 of the rotary table 20. As shown in FIG. 11 (A), the gain adjusting means operates the first slide drive mechanism 45 to bring the stylus 31 of the detector 30 into contact with the side surface of the mounting plate 22. ), The rotational drive mechanism 23 is operated, the stylus displacement detected by the detector 30 at this time is taken in, and the gain of the detector is calibrated from this displacement amount and the set displacement amount.

That is, after the detector driving mechanism 40 is operated and the stylus 31 of the detector 30 is brought into contact with the side surface of the mounting plate 22, the rotation driving mechanism 23 is operated in this state. Then, the notch 22 </ b> A formed in a part of the outer peripheral edge of the mounting plate 22 is detected by the detector 30. That is, the displacement of the stylus 31 of the detector 30 is taken in, and the gain of the detector 30 is calibrated from this displacement amount and the set displacement amount.
Accordingly, in this configuration as well, the conventional calibration jig and calibration master do not have to be used, so that there is no work associated with setting and removing the rotary table 20 and the measurement work is further improved. The mounting plate X-axis moving mechanism 24 or the mounting plate Y-axis moving mechanism 25 is not necessary, and the moving direction thereof coincides with the moving direction (first moving direction) of the first slide drive mechanism 45. In addition, since it is not necessary to rotate the rotary table 20 by operating the rotary drive mechanism 23, it can be simplified and speeded up.

  In the embodiment, the stylus stocker 50 is formed with the semicircular stylus holding portions 53 in the stocker body 51 at intervals in the vertical direction, and holds a plurality of types of styluses 31 in a horizontal posture. However, it is not limited to this. For example, the stylus holding portions 53 may be formed at intervals in the horizontal direction, and the stylus 31 may be held in a vertical posture.

  In the embodiment, the detector main body 32 and the stylus 31 may be detachably coupled by a magnet. Or not only magnetism but another structure may be sufficient. For example, the structure may be such that the detector main body 32 and the stylus 31 are detachably held by air suction, or a plurality of holding claws are provided on one side and the holding part is held on the other side by the holding claws. May be provided.

  In the embodiment, the detector 30 is configured to be movable in the X-axis direction and the Z-axis direction, but is not limited thereto.

  INDUSTRIAL APPLICABILITY The present invention can be used for a roundness measuring machine that continuously performs stylus replacement and measurement.

10 ... Base,
20 ... rotary table,
21 ... the body,
22 ... mounting plate,
22A ... Notch,
23 ... Rotation drive mechanism,
24: Mounting plate X-axis moving mechanism (mounting plate moving mechanism),
25. Mounting plate Y-axis moving mechanism (mounting plate moving mechanism),
30 ... detector,
31 ... Stylus,
32 ... the detector body,
40. Detector drive mechanism,
41 ... Column,
42: Elevating slider,
43 ... Elevating drive mechanism,
44 ... slide arm,
45. First slide drive mechanism,
46. Second slide drive mechanism,
47. Turning drive mechanism,
50 ... Stylus stocker,
60 ... Control device,
A: Measurement area,
L ... vertical axis,
W: Object to be measured.

Claims (5)

A base, a rotary table provided on the base so as to be rotatable about a vertical axis, and an object to be measured placed on the upper surface; a rotary drive mechanism for rotating the rotary table; a stylus in contact with the object to be measured; A detector having a detector main body that detachably mounts the stylus and outputs the displacement of the stylus as an electrical signal, and the detector is orthogonal to the vertical axis and approaches and separates from the rotary table In a roundness measuring machine having a first moving direction and a detector driving mechanism for driving in a second moving direction parallel to the vertical axis,
A stylus stocker which accommodates a plurality of types of styluses prepared corresponding to the measurement site of the object to be measured and is storable, and a control device;
The control device, when a measurement command is given, measurement execution means for measuring the roundness of the device under test while controlling the operation of the rotation drive mechanism and the detector drive mechanism;
Stylus replacement execution means for performing a stylus replacement operation between the detector and the stylus stocker while controlling the detector driving mechanism when a stylus automatic replacement command is given;
When a detector automatic gain calibration command is given, a preset set displacement amount is given to the stylus, and the gain of the detector is determined from the displacement of the stylus detected by the detector and the set displacement amount. A roundness measuring machine comprising gain adjusting means for calibrating. In the roundness measuring machine according to claim 1,
The rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, a disk-like mounting plate provided on an upper surface of the main body, and a measurement object on the upper surface, and the mounting table. A mounting plate moving mechanism that moves the plate in a direction perpendicular to the vertical axis,
The gain adjusting means operates the rotary drive mechanism to rotate the rotary table so that the moving direction of the mounting plate moving mechanism matches the first moving direction, and then rotates the detector drive mechanism. The detector is operated to bring the detector stylus into contact with the side surface of the mounting plate. In this state, the detector is detected when the mounting plate moving mechanism is moved by a preset set displacement amount. A roundness measuring machine that takes in the displacement of the stylus and calibrates the gain of the detector from the displacement amount and the set displacement amount. In the roundness measuring machine according to claim 1,
The rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, and a disk-like mounting plate provided on an upper surface of the main body for mounting an object to be measured. And
The gain adjusting means operates the detector driving mechanism to bring the detector stylus into contact with the side surface of the mounting plate. In this state, the detector driving mechanism is preset in the first movement direction. A perfect circle, which takes in the displacement of the stylus detected by the detector when moved by the set displacement amount and calibrates the gain of the detector from the displacement amount and the set displacement amount. Degree measuring machine. In the roundness measuring machine according to claim 1,
The rotary table includes a main body provided on the base so as to be rotatable about a vertical axis, a disk-like mounting plate provided on an upper surface of the main body, and a measurement object on the upper surface, and the mounting table. A mounting plate moving mechanism that moves the plate in a direction orthogonal to the vertical axis, and the notch depth from the outer periphery of the mounting plate has a notch depth from the outer peripheral edge. A notch corresponding to is formed,
The gain adjusting means operates the detector driving mechanism to bring the stylus of the detector into contact with the side surface of the mounting plate. In this state, the detector detects when the rotational driving mechanism is operated. The roundness measuring machine is characterized in that it takes in the displacement of the stylus and calibrates the gain of the detector from the displacement amount and the set displacement amount. In the roundness measuring machine according to any one of claims 1 to 4,
The stylus stocker is disposed outside a measurement region determined by a moving range of the rotary table and the detector driving mechanism,
The detector driving mechanism includes a column erected on the base, an elevating drive mechanism for driving the elevating slider in the vertical direction with respect to the column, and a slide arm with respect to the vertical axis with respect to the elevating slider. And a first slide drive mechanism for driving in a direction toward and away from the rotary table, and a detector provided at the tip of the slide arm in a direction perpendicular to the slide axis of the slide arm. A second slide drive mechanism for sliding, and a turning drive mechanism for turning the second slide drive mechanism about the slide axis of the slide arm,
The roundness measuring machine, wherein the detector is configured to be movable out of the measurement region by the operations of the second slide drive mechanism and the turning drive mechanism.

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