JPH05240638A - Inner diameter measuring instrument - Google Patents

Abstract

PURPOSE:To accurately measure the inner diameter of a work through simple work by stopping the rotation of the work when a touch sensor comes into contact with the inner diameter section of the work and locking the work in that position by means of an X and Y-axis driving means. CONSTITUTION:An X-Y table mechanism 3 provided with a Y-axis table mechanism 5 as a Y-axis moving means and X-axis table mechanism 7 as an X-axis moving means is positioned below the main body 1 of the instrument. A work holding means 9 which holds a work 11 is installed on the mechanism 7. By respectively providing clutch brakes for X- and Y-axes to the mechanism 3, the rotation of the work 11 is automatically stopped when a touch sensor 73 comes into contact with the inside diameter section of the work 11 and the work is locked to the then position. Then the inside diameter of the work 11 is measured at the locked position and another position after the works 11 is again moved in the X-axis direction and the inside diameter of the work 11 is calculated by averaging the measured values. Or, the measured values are confirmed as the maximum and minimum inside diameters of the work 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an inner diameter measuring device for measuring the inner diameter of a hollow work, and particularly to a wide range of work from a relatively large work to a small work. In addition, the present invention relates to a device capable of accurately measuring the inner diameter thereof by a simple work.

[0002]

2. Description of the Related Art For example, when an inner diameter portion of a work is polished by an inner diameter polishing apparatus, it is necessary to confirm whether or not the inner diameter portion is finished to a predetermined size. Conventionally,
This kind of inner diameter measurement is generally performed using, for example, an inner diameter gauge or the like. That is, a large number of inner diameter gauges finished in advance to a predetermined outer diameter are prepared, and one each is inserted into the inner diameter portion of the work, and the inner diameter of the work is specified from the insertion degree.

[0003]

According to the above-mentioned conventional structure, there is a problem that it is difficult to measure the inner diameter.
That is, it is necessary to insert various kinds of inner diameter gauges into each work and specify the inner diameter from the insertion state. Moreover, the measurement accuracy was not high at all. This was especially noticeable when the work had a small diameter.

The present invention has been made based on such a point, and an object of the present invention is to provide an inner diameter measuring device which enables an inner diameter to be accurately measured by a simple operation.

[0005]

In order to achieve the above object, an inner diameter measuring apparatus according to the present invention comprises a work holding means for holding a work to be measured, and a touch for inserting the inner diameter of the work to measure the inner diameter of the work. A sensor, a Z-axis direction driving unit that relatively moves the work holding unit and the touch sensor in the axial direction (Z direction) to position the touch sensor at a predetermined depth position of the inner diameter portion of the work, and the work holding unit. X-axis direction moving means for relatively moving the means and the touch sensor in an arbitrary radial direction (X direction), and the work holding means and the touch sensor in a radial direction (Y direction) orthogonal to the X direction. And a Y-axis direction moving means for moving the same,
The X-axis that drives the X-axis direction moving means to reduce the speed of rotation input to the X-axis direction moving means and transmit the rotation to the X-axis direction moving means, and cuts off the rotation transmission by the touch sensor coming into contact with the inner diameter portion of the workpiece to lock. The direction drive means and the Y-axis direction moving means are driven to decelerate the input rotation and transmit the rotation to the Y-axis direction moving means, and the touch sensor comes into contact with the inner diameter portion of the workpiece to interrupt the rotation transmission. Y to lock
And an axial driving means. At that time, it is assumed that the X-axis direction driving means and the Y-axis direction driving means are provided with a speed reducer and a clutch brake.
It is conceivable that the rotation input by the speed reducer is decelerated at a predetermined reduction ratio, and the clutch brake is appropriately turned on / off to interrupt and lock the rotation transmission.

[0006]

First, the work to be measured is held by the work holding means. Next, the work and the touch sensor are relatively moved in the Z direction, and the touch sensor is inserted at a predetermined depth position of the inner diameter portion of the work. Next, the X-axis direction moving means drives the X-axis direction moving means to relatively move the work and the touch sensor in the X direction. When the inner diameter portion of the work and the touch sensor come into contact with each other, the X-axis direction driving means blocks the transmission of rotation to the X-axis direction moving means and locks the position. In that state, for example, zero setting is performed, and rotation transmission is blocked and locked by the X-axis direction drive means. Next, the X-axis direction moving means drives the X-axis direction moving means to relatively move the work and the touch sensor in the X direction opposite to the above. When the inner diameter of the work and the touch sensor come into contact with each other, the X-axis direction drive means moves to the X
It blocks the transmission of rotation to the axial moving means and locks its position. Therefore, the relative movement amount of the work and the touch sensor in the X direction is calculated, and the half amount thereof is calculated. Then, the transmission of the rotation is blocked and the lock is released by the X-axis direction drive means, and the work and the touch sensor are relatively returned in the X direction by half the amount.

Then, the Y-axis direction moving means drives the Y-axis direction moving means to relatively move the work and the touch sensor in the Y direction. When the inner diameter portion of the work and the touch sensor come into contact with each other, the Y-axis direction driving means blocks the transmission of rotation to the Y-axis direction moving means and locks the position. In that state, for example, zero setting is performed, and rotation transmission is blocked and locked by the Y-axis direction drive means. next,
By driving the Y-axis direction moving means by the Y-axis direction driving means,
The work and the touch sensor are relatively moved in the Y direction opposite to the above. When the inner diameter portion of the work and the touch sensor come into contact with each other, the Y-axis direction driving means blocks the transmission of the rotational force to the Y-axis direction moving means and locks the position. Therefore, the relative movement amount of the work and the touch sensor in the Y direction is calculated, and the half amount thereof is calculated. Then, the transmission of rotation is blocked and the lock is released by the Y-axis direction driving means, and the work and the touch sensor are relatively returned in the Y direction by half the amount. That position becomes the center position of the inner diameter portion of the work. The value obtained by adding the outer diameter of the touch sensor to the relative movement amount of the work and the touch sensor in the Y direction is the inner diameter of the inner diameter portion of the work.

The above measurement is an example. For example, by repeating the above process several times in different directions, the value corresponding to the inner diameter is measured a plurality of times, and the average value thereof is specified as the inner diameter. Alternatively, it is also possible to specify the maximum value and the minimum value and end the measurement, and determine the measurement content according to the purpose.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the inner diameter measuring apparatus according to the present embodiment will be described with reference to FIGS. 1 to 4. First, there is an apparatus main body 1, and an XY table mechanism 3 is installed below the apparatus main body 1. First, there is a Y-axis table mechanism 5 as Y-axis moving means, and an X-axis table mechanism 7 as X-axis moving means is installed on the Y-axis table mechanism 5. A work holding means 9 is installed on the X-axis table mechanism 7 to hold the work 11.

The Y-axis table mechanism 5 is moved by a ball screw system. As shown in FIG. 3, there is a ball screw 13, and a ball nut 15 is screwed onto the ball screw 13. A table 17 is fixed to the table. Therefore, when the ball screw 13 rotates, the ball nut 15 whose rotation is restricted reciprocates and the table 17 reciprocates in the Y-axis direction.

It is Y that drives the Y-axis table mechanism 5.
The shaft drive means 19. This Y-axis drive means 19 is shown in FIG.
As shown in FIG. 3, it is composed of an operation handle 21, a clutch brake 23 connected to the operation handle 21, and a speed reducer 25 connected to the output side of the clutch brake 23. The ball screw 11 described above is connected to the speed reducer 25.

As shown in FIG. 4, the clutch brake 23 is composed of a clutch 27 and a brake 29. An input shaft 31 connected to the Y-axis operating handle 21 is provided on the clutch 27 side, and the input shaft 31 includes a bearing 33,
The rotor 37 is pivotally supported by 35 and the rotor 37 is fixed. A clutch field core 39 is arranged on the right side of the rotor 37 in the figure. The rotor 37
An armature 41 is arranged on the left side of the figure, and by exciting the clutch field core 39,
The armature 41 is attracted to the rotor 37.

Next, the structure of the brake 29 will be described.
First, there is an output shaft 43, which is a bearing 45,
It is pivotally supported by 47. Further, a brake field core 49 and a rotor 51 are arranged, and an armature 53 is arranged on the right side of the rotor 51 in the drawing. The armature 53 is attracted to the rotor 51 by exciting the brake field core 49. The armature 53 is integrated with the armature 41 on the clutch 27 side via an armature hub 55. The armature hub 55 is fixed to the output shaft 43.

When the clutch 27 side is on (the clutch field core 39 is excited) and the brake 29 is off (the brake field core 49 is non-excited). The rotation of the input shaft 31 side is transmitted to the output shaft 43 side. When the clutch 27 side is turned off in that state, the attraction of the armature 41 to the clutch field core 39 is released, so that the transmission of rotation is stopped. At the same time, brake 2
When the 9 side is turned on (the brake field core 49 is excited), the armature 53 is attracted to the brake field core 49, so that the rotation of the output shaft 43 side is stopped. That is, the output shaft 43 is stopped from rotating due to inertia, and the clutch 27 is turned off and stopped at that position at the same time.

The X-axis table mechanism 7 side has the same structure and is driven by the X-axis drive means 57 as shown in FIG. The X-axis drive means 57 is the X-axis operation handle 5.
9, a clutch brake 61 connected to the X-axis operation handle 59, and a speed reducer 63 connected to the clutch brake 61. The clutch brake 61 is composed of a clutch 65 and a brake 67. The clutch 65 and the brake 67 have the same structure as that on the Y-axis side which has already been described.

A quill 69 is attached to the upper portion of the apparatus main body 1 so as to be vertically movable. A touch sensor 73 is attached to the quill 69 via an insulator 71. The quill 69 is driven by the Z-axis drive means 74. That is, the quill 69 has a ball nut portion 75.
The ball nut portion 75 is screwed into the ball screw 77. The ball screw 77 is rotated in an appropriate direction by the vertical handle 79. When the upper and lower handles 79 are rotated in an appropriate direction, the ball screw 77
Rotate in the same direction, whereby the ball nut portion 75, the quill 69, and the touch sensor 73 whose rotation is restricted move up and down.

As shown in FIG. 2, a sensor unit 81 is installed on the upper portion of the apparatus main body 1 so that a signal from the touch sensor 73 can be input. The sensor unit 81 includes a touch sensor 73
An X-axis display unit 83 that displays the amount of movement in the X-axis direction and a Y-axis display unit 85 that displays the amount of movement of the touch sensor 73 in the Y-axis direction are installed. Further, based on the signal from the touch sensor 73, a signal is output to the Y-axis drive means 19 and the X-axis drive means 57 already described to control ON / OFF of the respective clutch brakes 23 and 61. In addition, various operation units and a display unit (not shown) are installed. For example,
A push button switch and the like for cutting off the rotation transmission and releasing the lock by the clutch brakes 23 and 61 are installed.

The operation will be described based on the above configuration. First, the XY table mechanism 3 is appropriately operated to operate the work 11
Is located at an appropriate position (an appropriate position where the touch sensor 73 enters the inner diameter portion of the work 11 in a non-contact state). Next, the upper and lower handles 79 are rotated to lower the touch sensor 73 and insert the work 11 into the inner diameter portion of the work 11 at a predetermined depth position. For example, it is assumed that the touch sensor 73 is inserted into the inner diameter portion of the work 11 in the state shown in FIG. The outer diameter of the touch sensor 73 is (d),
The inner diameter of the work 11 is (D).

In the above state, the X / Y table mechanism 3 is driven to move the work 11 in the X-axis direction. When the work 11 moves in the X-axis direction and the touch sensor 73 comes into contact with the inner diameter portion of the work 11, the movement of the work 11 in the same direction automatically stops. That is, a load acts by the work 11 and the touch sensor 73 coming into contact with each other, whereby the clutch brake 61 functions (the clutch 65 is turned off and the brake 67 is turned on), and the X-axis operation handle 5 is operated.
This is because transmission of rotation from 9 is stopped and the position is locked. The state is shown in FIG. The touch sensor 73 and the work 11 are in contact with each other at point a. At this time, the zero setting is performed, and the push button switch (not shown) is operated to turn on the clutch 65 and turn off the brake 67.

Next, the X / Y table mechanism 3 is driven,
The work 11 is moved in the X-axis direction opposite to the above.
Then, when the inner diameter portion of the work 11 and the touch sensor 73 come into contact with each other, the operation is stopped by the action of the clutch brake 61. The state is shown in FIG. The touch sensor 73 and the work 11 are in contact with each other at point b. If the relative movement distance between the touch sensor 73 and the workpiece 11 is (L) during the transition from the state shown in FIG. 6 to the state shown in FIG. 7, (L / 2)
The center line of the work 11 exists at the place where the work 11 has returned. Therefore, by operating a push button switch (not shown), the clutch 65 is turned on and the brake 67 is turned off, and the XY table mechanism 3 is driven to move the work 11 in the X-axis direction as shown in FIG. Return only (L / 2).

Next, the XY table mechanism 3 is driven,
The work 11 is moved in the Y-axis direction. When the work 11 moves in the Y-axis direction and the touch sensor 73 contacts the inner diameter portion of the work 11, the movement of the work 11 in the same direction automatically stops. That is, the work 11 and the touch sensor 73
Is brought into contact with a load, which causes the clutch brake 23 to function and stop the transmission of rotation from the Y-axis handle 21. The state is shown in FIG. The touch sensor 73 and the work 11 are in contact with each other at point c. At this time, the zero setting is performed and the push button switch (not shown) is operated to turn on the clutch 27 and turn off the brake 29.

Next, the X / Y table mechanism 3 is driven,
The work 11 is moved in the Y-axis direction opposite to the above.
When the work 11 moves in the Y-axis direction and the touch sensor 73 contacts the inner diameter portion of the work 11, the movement of the work 11 in the same direction automatically stops. The state is shown in FIG. The touch sensor 73 and the work 11 are in contact with each other at point d. Assuming that the relative movement distance between the touch sensor 73 and the work 11 is (M) during the transition from the state shown in FIG. 9 to the state shown in FIG. Will exist. Then, by operating a push button switch (not shown), the clutch 27 is turned on and the brake 29 is turned off, and as shown in FIG. 11, the XY table mechanism 3 is driven to move the workpiece 11 to the Y position.
Return only (M / 2) in the axial direction. This is the touch line 73
Is located at the axial center position of the work 11. The value obtained by adding the outer diameter (d) of the touch sensor 27 to the above (M) is the inner diameter (D ₁ ) of the work 11.

Since the inner diameter (D ₁ ) of the work 11 is measured at the above stage, the measurement may be completed, but in the case of the present embodiment, the work 11 is again measured in the X-axis direction. Then, the inner diameter (D ₂ ) of the work 11 is measured again. That is, the XY table mechanism 3 is driven to move the work 11 again in the X-axis direction (shown in FIG. 12),
Next, the work 11 is moved in the X-axis direction opposite to the above (shown in FIG. 13). When the distance that the workpiece 11 and the touch sensor 73 relatively move during the transition from FIG. 12 to FIG. 13 is (N), the inner diameter (D ₂ ) of the workpiece 11 is (N + d).

After that, the measured inner diameter (D ₁ ) and (D
₂ ) Calculate the average with the value and use it as the inner diameter (D), or
It will be confirmed as the maximum and minimum values. Further, by rotating the workpiece 11 by an arbitrary angle and performing the same measurement as described above at another location, the inner diameters (D ₁ ') and (D ₂ ') are measured, and the average including the measurement results is calculated. It may be calculated or confirmed as the maximum value or the minimum value. When the inner diameter of the work 11 is tapered, the insertion position of the touch sensor 73 into the inner diameter of the work 11 is changed and the same operation is performed to confirm the degree of taper. You can also

According to this embodiment, the following effects can be obtained. First, the work of measuring the inner diameter of the work 11 is simplified. That is, by appropriately operating the XY table mechanism 3 and moving the work 11 in the X-axis direction or the Y-axis direction several times, a predetermined calculation is performed.
This is because the inner diameter of the work 11 can be measured.

Particularly, in the X / Y-axis table mechanism 3, the clutch brakes 23 and 61 are respectively provided on the X-axis and the Y-axis.
When the touch sensor 73 comes into contact with the inner diameter portion of the work 11, the rotation transmission is automatically stopped and the position is locked. Therefore, the X-axis handle 21 and the Y-axis handle 59 are Also when operating via the touch sensor 73, it is not necessary to operate in consideration of damage or the like due to collision between the touch sensor 73 and the inner diameter portion of the work 11, and the operability is extremely good. Further, since the position of the touch sensor 73 is locked at the same time when the touch sensor 73 comes into contact with the work 11, the touch sensor 73 is not bent, and the measurement can be performed with high accuracy and the soundness of the touch sensor 73 is impaired. Nor.

Further, in the X / Y-axis table mechanism 3, X
The interposition of the speed reducers 25 and 63 on the shaft and the Y axis respectively greatly contributes to the improvement of the operability. That is, since the input from the X-axis operation handle 21 and the Y-axis operation handle 59 is decelerated by the reduction gears 25 and 63 at a predetermined reduction ratio, the movement amount with respect to the operation amount is minute, and the clutch brakes 23 and 61 are used. Combined with the function of, operability can be enhanced. This is particularly effective when the work 11 has a small diameter and the movement distance between the work 11 and the touch sensor 73 is small.

The present invention is not limited to the above-mentioned embodiment. First, although the operation of the X / Y-axis table mechanism 3 and the vertical movement operation of the touch sensor 73 are all described as manual operations in the above-described embodiment, they may all be automated. That is, the measurement process shown in FIGS. 5 to 13 (this is just an example) is programmed in advance and is stored and input as a controller. On the other hand, servo motors are arranged in the vertical movement drive mechanism of the X / Y-axis table mechanism 3 and the touch sensor 73, and the servo motors are controlled by the controller to automate the measurement work. Further, it may be considered that the work 11 is carried in and out by a carry-in / carry-out robot, and the work 11 is automated. Further, in the case of the one embodiment,
Although the touch sensor 73 is moved in the Z-axis direction and the work 11 side is moved in the X-direction and the Y-direction, the present invention is not limited thereto. In short, it suffices that the touch sensor 73 and the work 11 can be relatively moved in the Z axis direction, the X direction, and the Y direction.

[0029]

As described in detail above, according to the inner diameter measuring device of the present invention, the inner diameter of a work can be accurately measured by an extremely simple operation. In particular, the X-axis driving means and the Y-axis driving means are Since the touch sensor and the inner diameter of the work contact each other, the rotation transmission is stopped and the position is locked.Therefore, consider the collision between the touch sensor and the work when operating. There is no need, and it is extremely easy to operate. Particularly, when the work has a small diameter and the relative movement distance between the touch sensor and the inner diameter portion of the work is small, a high effect is exhibited.

[Brief description of drawings]

FIG. 1 is a side view of an inner diameter measuring device according to an embodiment of the present invention.

FIG. 2 is a front view of the inner diameter measuring device according to the embodiment of the present invention.

FIG. 3 is a diagram showing an embodiment of the present invention and is a diagram showing a configuration of a Y-axis table mechanism and a Y-axis driving means.

FIG. 4 is a sectional view showing the structure of a clutch brake according to an embodiment of the present invention.

FIG. 5 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in process order.

FIG. 6 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in process order.

FIG. 7 is a diagram showing an embodiment of the present invention, which is a diagram showing an inner diameter measuring operation in process order.

FIG. 8 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in process order.

FIG. 9 is a diagram showing an embodiment of the present invention and is a diagram showing an inner diameter measuring operation in process order.

FIG. 10 is a diagram showing an embodiment of the present invention and is a diagram showing an inner diameter measuring operation in process order.

FIG. 11 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in process order.

FIG. 12 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in the order of steps.

FIG. 13 is a view showing an embodiment of the present invention and is a view showing an inner diameter measuring operation in the order of steps.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 5 Y-axis table mechanism (Y-axis moving means) 7 X-axis table mechanism (X-axis moving means) 11 Work piece 19 Y-axis driving means 57 X-axis moving means 73 Touch sensor 74 Z-axis driving means

Claims (2)

[Claims] 1. A work holding means for holding a work to be measured, a touch sensor inserted into the inner diameter portion of the work for measuring the inner diameter of the work, and the work holding means and the touch sensor in the axial direction (Z direction). Z-axis direction driving means for moving the touch sensor at a predetermined depth position of the inner diameter portion of the work by moving the work sensor and the touch sensor relative to each other in an arbitrary radial direction (X direction). An X-axis direction moving means for moving, a Y-axis direction moving means for relatively moving the work holding means and the touch sensor in a radial direction (Y direction) orthogonal to the X direction, and the X-axis direction moving means. The rotation that is driven and input is decelerated and transmitted to the X-axis direction moving means, and the rotation of the rotation is blocked and locked by the touch sensor coming into contact with the inner diameter portion of the workpiece.
The axial driving means and the Y-axis moving means are driven to decelerate the input rotation and transmit the rotation to the Y-axis moving means, and the rotation of the touch sensor is blocked by the contact with the inner diameter of the workpiece. And an Y-axis direction driving means for locking the inner diameter measuring apparatus. 2. The inner diameter measuring device according to claim 1,
The X-axis direction driving means and the Y-axis direction driving means are provided with a speed reducer and a clutch brake. By decelerating the rotation input by the speed reducer at a predetermined reduction ratio, and turning the clutch brake on and off as appropriate. An inner diameter measuring device characterized in that it blocks rotation transmission and locks it.