JP2001099607A - Work quality measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work quality measuring apparatus which can reduce irregularity of measuring precision. SOLUTION: This work quality measuring apparatus which judges the quality concerning a peripheral profile of a ring type inspection surface 10 formed on a work 1 is equipped with a work fixing means 9 fixing the work 1, a rotary abutting segment 54 abutting against the inspection surface 10 of the work 1, rotating at least one time along the inspection surface 10 of the work 1 and imitating the peripheral profile of the inspection surface 10 in accordance with the rotation, a movable synchro board 50 being linked with the abutting segment 54, rotating synchronously with the rotation of the abutting segment 54 in the peripheral direction of the inspection surface 10 and having a synchro ring surface 51 traveling synchronously with the displacement of the abutting segment 54 in the radial direction of the inspection surface 10 of the work 1, and a synchro displacement detecting segment 61 abutting against the synchro ring surface 51 of the synchro board 50 and detecting the displacement of the synchro ring surface 51 of the synchro board 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work quality measuring apparatus for judging the quality of a circumferential profile of a ring-shaped inspection surface provided on a work (for example, the quality of a center axis of the circumferential profile of a ring-shaped inspection surface). About.

[0002]

2. Description of the Related Art A workpiece having a ring-shaped portion is provided. In recent years, there has been an increasing demand for higher quality workpieces,
In order to improve the quality of the work, it may be required to determine the quality of the circumferential profile of the ring-shaped portion of the work.

As a technique for judging the quality, conventionally, a commercially available three-dimensional measuring machine is used, an outer peripheral surface of a ring-shaped portion of a work is set as a ring-shaped inspection surface, and coordinates of arbitrary three points on the ring-shaped inspection surface are represented. The coordinates of the center axis of the ring-shaped inspection surface are determined based on the representative values, and the circumferential profile of the ring-shaped inspection surface of the workpiece is determined based on the coordinates of the center axis. The quality is judged.

[0004]

However, in the above-mentioned work, a minute distortion may be generated on the ring-shaped inspection surface of the work so as not to affect the quality. In particular, when the workpiece is a welded assembly, the above-described minute distortion may occur on the ring-shaped inspection surface of the workpiece due to welding distortion.

[0005] According to the above-mentioned prior art, a three-dimensional measuring machine has a typical value of 3 on a ring-shaped inspection surface of a work.
When measuring the points, if the ring-shaped inspection surface of the work has a small distortion, the measurement accuracy tends to vary, and the accuracy of the judgment of the quality of the ring-shaped inspection surface of the work is not always satisfactory. I couldn't do it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a work quality measuring apparatus capable of reducing variation in measurement accuracy.

[0007]

SUMMARY OF THE INVENTION A work quality measuring apparatus according to the present invention is a work quality measuring apparatus for determining the quality of a circumferential profile of a ring-shaped inspection surface provided on a work. A rotating abutment that abuts on the ring-shaped inspection surface of the work and makes at least one rotation along the ring-shaped inspection surface of the work, and follows the profile of the ring-shaped inspection surface of the work with the rotation; The rotary abutment is connected to a rotary abutment, rotates in synchronization with the rotation of the rotary abutment in the circumferential direction of the ring-shaped inspection surface of the workpiece, and rotates in the radial direction of the ring-shaped inspection surface of the workpiece. A movable synchro disk having a synchro ring surface displaced in synchronization with the displacement of the movable synchro disk; and a synchro ring surface of the movable synchro disk fixed near the movable synchro disk. Contact, is characterized in that with the synchronous displacement detectors for detecting a displacement of the synchro ring face of the movable synchro plate to rotate.

According to the work quality measuring apparatus of the present invention, the rotating contact is brought into contact with the ring-shaped inspection surface of the work fixed by the work fixing means while the rotating contact is in contact with the ring-shaped inspection surface of the work. At least one revolution along. With the rotation, the rotating abutment follows the circumferential profile of the ring-shaped inspection surface of the workpiece.

Since the rotary abutment and the movable synchro disk are connected and integrated, when the rotary abutment rotates along the circumferential direction of the ring-shaped inspection surface of the work, the rotation of the rotary abutment and the rotation of the rotary abutment are performed. The synchro ring surface of the movable synchro disk rotates in synchronization. During such rotation, when the rotating abutment is displaced along the radial direction of the ring-shaped inspection surface of the work, the synchro ring surface of the movable synchro disk is moved in the radial direction in synchronization with the displacement of the rotating abutment. Displace along.

The displacement of the synchro ring surface of the movable synchro disk is detected by a synchro displacement detector.
As a result, the displacement of the rotating abutment following the ring-shaped inspection surface of the work is detected by the synchro displacement detector as the displacement of the synchro ring surface of the movable synchro disk.

[0011]

According to a preferred embodiment of the work quality measuring apparatus of the present invention, the diameter of the synchro ring surface of the movable synchro disk is set to be larger than the diameter of the ring-shaped inspection surface of the work. can do. In this case, the circumferential profile of the ring-shaped inspection surface of the workpiece is
It can be grasped as a circumferential profile of the synchro ring surface of the movable synchro disk having a larger diameter than the ring-shaped inspection surface.

Therefore, even when the diameter of the ring-shaped inspection surface of the workpiece is small, the circumferential profile of the ring-shaped inspection surface having a small diameter is changed to the diameter of the synchro-ring surface of the movable synchro disk having a larger diameter than the ring-shaped inspection surface. The diameter can be recognized as a circumferential profile. As a result, the peripheral length of the peripheral profile of the ring-shaped inspection surface can be enlarged and recognized as the peripheral length of the synchro-ring surface of the movable synchro disk having a larger diameter than the ring-shaped inspection surface. Therefore, the number of measurement points in the circumferential direction can be increased, and the measurement accuracy of the work quality measuring device can be improved.

The work fixing means may be any as long as it can fix the work. The synchro displacement detector may be any as long as it can convert the mechanical displacement of the synchro ring surface into an electric signal. One or more synchro displacement detectors may be provided, but two or three synchro displacement detectors may be provided.

As the work, a welded assembly in which distortion is easily generated by welding can be used, but a cast product or a forged product may be used. The shape and material of the work are not particularly limited as long as the work has a ring-shaped inspection surface. The work can be applied to, for example, a manifold such as an exhaust manifold and an intake manifold mounted on an internal combustion engine, but is not limited thereto.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the work quality measuring apparatus according to the present embodiment determines the quality of coordinates of a central axis P1 relating to a circumferential profile of a ring-shaped inspection surface 10 provided on a work 1. . The work quality measuring device includes a base 2 installed on the installation surface M1. The base 2 has a first cylinder 21 that is operated by fluid pressure (pneumatic or hydraulic).
Is installed. The first cylinder 21 includes a cylinder body 21 a and a cylinder rod 2 having a tip held by the base 2.
1b. When the first cylinder 21 operates, the movable base 3 moves along the horizontal direction, that is, along the directions of the arrows X1 and X2. Therefore, the first cylinder 21 functions as a movable table moving unit.

The movable base 3 is movably held by the base 2 as described above, and includes a spindle case 30 held by the movable base 3 and a rotary plate rotatably disposed at the front end of the spindle case 30. And a spindle 3 which is a rotating shaft rotatably held in a spindle case 30 via a ring-shaped bearing 30u, 30w inside a spindle case 30 so as to be rotatable.
2, a pair of fixed holders 33a, 33b fixed at a predetermined interval on the front surface of the rotary plate 31, and a bridge between the fixed holders 33a, 33b along a direction perpendicular to the axis of the spindle 32 (ie, radial direction). Slide shaft 34
A movable support part 35 movably fitted to the slide shaft 34, a measuring part 5 detachably attached to the movable support part 35, and a horizontal shaft type above the spindle case 30 via a motor bracket 36c. Drive motor 36 arranged in
And a power transmission mechanism 38 provided between the motor shaft 37 of the drive motor 36 and the rear end 32b of the spindle 32.

An elastic spring 79 is interposed between the movable support 35 and the holder 33b. The movable support 35 is urged by a spring 79 in the direction of arrow B2.
The spring 79 may be a coil spring, a leaf spring, or a disc spring as long as it has a resilient force.

The rotary plate 31 is integrally fixed to the tip of a spindle 32,
When 2 rotates, the rotating plate 31 rotates integrally with the slide shaft 34 and the movable support 35 in the same direction.

The power transmission mechanism 38 transmits the rotational driving force of the motor shaft 37 to the spindle 32. The power transmission mechanism 38 is connected to a driving pulley 39 held at the rear end of the motor shaft 37 and a rear end 32b of the spindle 32. Driven pulley 40 held
And an endless belt 41 provided between the driving pulley 39 and the driven pulley 40.

An original rotational position detection plate 43 is held at the rear end 32b of the spindle 32. A proximity switch 45 is provided on a switch bracket 44 provided on the base 2.
Has been fixed. When the spindle 32 rotates, the rotation original position detection plate 43 integral with the spindle 32 rotates,
The original position of the rotating original position detecting plate 43 is detected by the proximity switch 45. As a result, one of the spindles 32
Rotation is detected. As a result, one rotation of a synchro ring surface 51 of a movable synchro disk 50 described later, which is rotated by the spindle 32, is detected. Similarly, the spindle 32
One rotation of the rotation contact 54 to be described later is detected.

A description will be given of the measuring section 5 described above.
The measuring section 5 is held at the front side of the movable synchro disk 50, the movable synchro disk 50 which is disposed at the tip end side of the spindle 32 and is rotated vertically, the shaft portion 52 integrated with the movable synchro disk 50. An L-shaped arm-shaped connecting bracket 53 serving as a connecting portion, and a thin rod-shaped rotary abutment 5 integrally connected to a tip end of the connecting bracket 53 by a mounting nut 53r.
4 and a mounting flange portion 56 integrally provided on the back side of the shaft portion 52.

The movable synchro disk 50 is a disk-shaped disk made of a hard material (for example, metal) having abrasion resistance, and has a synchro-ring surface 51 formed on an outer peripheral surface having a perfect circular shape.
With.

As shown in FIG. 7, a mounting bolt 56t is inserted into an insertion hole 56k of the mounting flange 56 of the measuring section 5,
The mounting bolt 56t is inserted into the bolt hole 35 of the movable support 35.
By screwing into t, the measuring section 5 is detachably held by the movable supporting section 35.

Since the rotating contact 54 and the movable synchro disk 50 are integrally connected by the connection bracket 53 as described above, the rotating abutment 54 and the synchro ring surface 51 of the movable synchro disk 50 are synchronized. Move in the same direction.

Therefore, when the rotary contact 54 rotates along the circumferential direction of the ring-shaped inspection surface 10 of the work 1, the movable synchro disk 50 rotates in the same direction in synchronization. When the rotating contact 54 is displaced in the radial direction of the ring-shaped inspection surface 10 of the work 1, the synchro ring surface 51 of the movable synchro disk 50 is synchronously moved along the radial direction of the ring-shaped inspection surface 10 of the work 1. Displace.

As shown in FIG. 1, the first synchro displacement detector 61 is fixed near the movable synchro disk 50,
Specifically, it is fixed via a fixing bracket 63 held on the upper part of the spindle case 30. The first synchro displacement detector 61 includes a first main body 61a fixed to the fixed bracket 63, and a first protrusion detector 61c protruding from the first main body 61a toward the synchro ring surface 51 of the movable synchro disk 50. And the first protrusion detector 61
It converts the mechanical displacement of c into an electric signal (voltage signal), and is specifically constituted by a potentiometer.

As shown in FIGS. 1 and 3, a retracting means 7 for retracting the rotary contact 54 is provided on the upper part of the spindle case 30. The retracting means 7 includes a second cylinder 72 fixed to a fixed bracket 63 fixed to the spindle case 30 and operated by fluid pressure (air pressure or hydraulic pressure), and an extruding mechanism 74 held at the front side of the spindle case 30. I have.

The push-out mechanism 74 of the retracting means 7 has a section L fixed to the rotating plate 31 of the spindle case 30.
A letter-shaped bracket 75, a push pin guide 76 held by the bracket 75, and a push pin 77 held by the push pin guide 76 and capable of being pushed downward.
And

When the second cylinder 72 is actuated and its cylinder rod 72c moves forward in the direction of arrow Y1, the push-out pin 77 is pushed downward, ie, in the direction of arrow Y1.
The movable support 35 moves in the same direction along the slide shaft 34 against the spring force of the spring 79. As a result, the rotary abutment 54 continuously connected to the movable support portion 35 via the movable synchro disk 50 or the like can move downward, that is, in the direction of the arrow Y2, and retreat from the work 1.

As shown in FIG. 2, a second synchro displacement detector 62 is provided at a position where the phase is shifted from the first synchro displacement detector 61 by about 90 degrees. The second synchro displacement detector 62 is the same as the first synchro displacement detector 61, and is fixed to the vicinity of the movable synchro disk 50 via a fixing bracket (not shown). The second synchro displacement detector 62 includes a second main body 62a fixed to a fixed bracket, and a second protrusion detector 62c protruding from the second main body 62a toward the movable synchro disk 50. It converts the mechanical displacement of the protrusion detector 62c into an electric signal (voltage signal), and is specifically configured by a potentiometer.

The first projection detector 61c is moved by an arrow C by a spring (not shown) built in the first synchro displacement detector 61.
It is urged in one direction and is in close contact with the synchro ring surface 51 of the movable synchro disk 50. Similarly, the second projection detector 62c is urged in the direction of arrow C2 by a spring (not shown) incorporated in the second synchro displacement detector 62, and is in close contact with the synchro ring surface 51 of the movable synchro disk 50. .

The synchro ring surface 5 of the movable synchro disk 50
The first projection detector 61c of the first synchro displacement detector 61 is arranged in the vertical direction, that is, along the Y direction, so as to be able to detect the Y-direction displacement. In addition, the movable synchro disk 50
The second protrusion detector 62c of the second synchro displacement detector 62 is positioned in the horizontal direction, that is, in the X direction, so that the X-direction displacement (displacement in the direction perpendicular to the Y direction) of the synchro ring surface 51 can be detected.
It is arranged along the direction.

In other words, the first protrusion detector 61c can detect the Y-direction displacement (vertical displacement) of the synchro ring surface 51 of the movable synchro disk 50, and the second protrusion detector 62c can detect the synchro ring of the movable synchro disk 50. The first synchro-displacement detector 61 and the second synchro-displacement detector 62 are arranged so that their circumferential phases differ by about 90 degrees so that the X-direction displacement (lateral displacement) of the surface 51 can be detected.

As shown in FIG. 4, the control device 8 according to the work quality determination device according to the present embodiment includes an input signal processing circuit 8
0, a control circuit 82 having a CPU having an arithmetic function, a memory 83 as storage means, and an output signal processing circuit 84 for outputting a signal. Various signals from sensors such as the proximity switch 45, the first synchro displacement detector 61, and the second synchro displacement detector 62 are input to the input signal processing circuit 80. The drive motor 36, the first cylinder 21, and the second cylinder 72 are controlled based on the control signal output from the output signal processing circuit 84, and furthermore, it means that the ring-shaped inspection surface 10 of the work 1 is good. The display device 85 is controlled to display “OK” or “NG” meaning that the ring-shaped inspection surface 10 of the work 1 is not good.

The work fixing means 9 shown in FIG.
Has a function of detachably fixing the movable table 3
And on the installation surface M2 so as to be located in front of the measuring unit 5.

Next, a case where the quality of the ring-shaped inspection surface 10 of the work 1 is measured will be described. The work 1 is made of metal and has a cylindrical body 11 having a ring-shaped inspection surface 10 as a part to be inspected, a flange part 12 holding the cylindrical body 11, a flange part 13, and a flange part 12 and a flange part 13. And a tube body 14 laid therebetween.

The work 1 is fixed to the work fixing means 9.
In this state, the center axis P1 of the ring-shaped inspection surface 10 of the work 1 is along the horizontal direction.

First, by operating the cylinder rod 72c of the second cylinder 72 of the retracting means 7 in the direction of the arrow Y1, the rotating contact 54 does not collide with the workpiece 1.
The rotary contact 54 is retracted downward, that is, in the direction of arrow Y2. Next, the first cylinder 21 is operated to move the movable base 3 forward in the horizontal direction, that is, along the direction of the arrow X1, so that the rotating abutment 54 of the measuring unit 5 approaches the ring-shaped inspection surface 10 of the workpiece 1. Let it.

As described above, the ring-shaped inspection surface 10 of the work 1
In a state where the rotary abutment 54 approaches the second cylinder 72, the second cylinder 72 operates in reverse to move the cylinder rod 72c upward, that is, in the direction of the arrow Y3. As a result, the movable support 35 moves along the slide shaft 34 with the arrow B by the spring force of the spring 79.
It moves in two directions, and accordingly, the rotating contact 54
Abut on the ring-shaped inspection surface 10.

In the state where the rotary contact 54 is in contact with the ring-shaped inspection surface 10 of the work 1 as described above, the drive motor 36 is driven to rotate, and the spindle 32 rotates around the axis thereof via the power transmission mechanism 38. Rotate with. As a result, the rotary plate 31 and the movable synchro disk 50 rotate in the same direction together with the rotary abutment 54. Although the rotation speed of the rotation abutment 54 can be appropriately selected, for example, about 6 to 30 rpm,
In particular, it can be set to about 10 to 15 rpm. However, it is not limited to this.

When the rotary abutment 54 rotates along the ring-shaped inspection surface 10 of the work 1, the movable support 35 is urged in the direction of arrow B2 by the spring 79 as described above. The contact 54 comes into close contact with the ring-shaped inspection surface 10 of the work 1 without leaving the ring-shaped inspection surface 10 of the work 1. Therefore, when the rotating contact 54 rotates, the tip of the rotating contact 54 can follow the circumferential profile of the ring-shaped inspection surface 10 while contacting the ring-shaped inspection surface 10 of the work 1.

At this time, since the rotating abutment 54 and the movable synchro disk 50 are integrally connected by the connecting bracket 53, the synchro ring surface 5 of the movable synchro disk 50 is provided.
1 operates in synchronization with the operation of the rotating contact 54. That is, when the rotary abutment 54 rotates along the circumferential direction of the ring-shaped inspection surface 10 of the work 1, the synchro ring surface 51 of the movable synchro disk 50 rotates in synchronization with the rotation of the rotary abutment 54. . When the rotating contact 54 is displaced in the radial direction of the ring-shaped inspection surface 10 of the work 1, the synchro ring surface 51 of the movable synchro disk 50 is moved in synchronization with the displacement of the rotating contact 54. It is displaced in the radial direction of the shape inspection surface 10.

As a result, the ring-shaped inspection surface 10 of the work 1
Is detected by the first synchro displacement detector 61 and the second synchro displacement detector 62 as a circumferential profile of the synchro ring surface 51 of the movable synchro disk 50.

That is, as shown in FIGS. 2 and 4, in this embodiment, the ring-shaped inspection surface 10 of the work 1 is
During the following, the first synchro displacement detector 61
The electrical signals as the detection results of the second synchro displacement detector 62 are sequentially input to the control circuit 82 via the input signal processing circuit 80 of the control device 8 and stored in a predetermined area of the memory 83 of the control device 8. You.

In this embodiment, even when the diameter of the ring-shaped inspection surface 10 of the work 1 is small, the circumferential profile of the ring-shaped inspection surface 10 having a small diameter is changed to the synchro-ring surface of the movable synchro disk 50 having a large diameter. The diameter can be recognized as an enlarged peripheral profile of 51. As a result, the circumference of the ring-shaped inspection surface 10 having a small diameter can be enlarged and recognized as the circumference of the synchro ring surface 51 of the movable synchro disk 50 having a large diameter. As a result, even when the diameter of the ring-shaped inspection surface 10 of the work 1 is small, the number of measurement points in the circumferential direction can be increased, and the measurement accuracy of the work quality measuring device can be improved.

That is, in the present embodiment, the rotating contact 54 makes one rotation (360 degrees) on the ring-shaped inspection surface 10 of the work 1.
In the meantime, the first synchro displacement detector 61 detects 1000 pieces of displacement information (number of detections n = 1000), and the second synchro displacement detector 62 detects 1000 pieces of displacement information (number of detections n = 1000). Information is detected. These pieces of information are input to the control circuit 82 via the input signal processing circuit 80 of the control device 8 via the signal lines 61k and 62k.
It is stored in a predetermined area of the memory 83.

In this embodiment, the first synchro displacement detector 6
Based on the detection results of the first and second synchro displacement detectors 62, the quality of the circumferential profile of the ring-shaped inspection surface 10 of the work 1 is measured. In this case, one of the x component and the y component is determined based on (1) in Expression 1, and the other of the x component and the y component is determined based on (2). α means the diameter of the synchro ring surface 51 of the movable synchro disk 50 corresponding to the diameter of the ring-shaped inspection surface 10 of the work 1 and is a value that can be grasped as a fixed value and is larger than the size of Cn. Cn is the first synchro displacement detector 6
This means a minute displacement detected by the first or second synchro displacement detector 62.

Based on the x and y components, the control circuit 8
In step 2, the actual coordinates of the center axis P1 of the ring-shaped inspection surface 10 of the workpiece 1 are obtained. Further, the center axis P1 obtained by the measurement
The control circuit 82 compares the coordinates of the center axis Pm of the ring-shaped inspection surface of the master work, which has been measured in advance, with the coordinates of the center axis Pm. If the amount of deviation between the measured coordinates of the center axis P1 of the work 1 and the coordinates of the center axis Pm of the master work is within the threshold value, the control circuit 82 of the control device 8 sets the inspected ring-shaped inspection surface. An “OK signal” indicating that the work 10 is good and the work 1 is good is output to the display device 85. On the other hand, if the difference between the two exceeds the threshold, the control circuit 82 of the control device 8 indicates that the inspected ring-shaped inspection surface 10 is not good and the work 1 is defective. The “NG signal” is output to the display device 85.

[0050]

(Equation 1)

As can be understood from the above description, in the present embodiment, the rotating abutment 54 is rotated along the circumferential direction of the ring-shaped inspection surface 10 of the workpiece 1 and the ring-shaped inspection surface 10 is rotated.
Therefore, it is not necessary to adopt a method of rotating the work 1 itself, and the work 1 can be fixed at the time of measurement. Therefore, when it is difficult to rotate the work 1, for example,
This is suitable when the entire work 1 has a complicated shape or a different shape, specifically, when the work 1 has a complicated shape like a manifold, or when the work 1 is heavy.

Further, in the present embodiment, a method is employed in which the movable synchro disk 50 is rotated integrally with the rotating abutment 54 that follows the ring-shaped inspection surface 10 of the work 1 instead of rotating the work 1. I have. This movable synchro disk 50
Is the diameter of the ring-shaped inspection surface 10 of the work 1 that is rotated in the circumferential direction of the ring-shaped inspection surface 10 of the work 1 in synchronization with the displacement of the rotation abutment 54, Or displacement in the direction. That is, while the work 1 is fixed at the time of measurement, the displacement of the circumferential profile of the ring-shaped inspection surface 10 of the work 1 is changed by the displacement of the synchro ring surface 51 of the rotating movable synchro disk 50 (the rotation direction of the synchro ring surface 51). , The radial displacement of the synchro ring surface 51) can be detected by the first synchro displacement detector 61 and the second synchro displacement detector 62.

Therefore, in the present embodiment, the first synchro displacement detector 61 and the second synchro displacement detector 62 are not used for rotating the first synchro displacement detector 61 and the second synchro displacement detector 62 at the time of measurement. It is possible to adopt a method of fixing 62. Therefore, it is not necessary to adopt a method of rotating the signal lines 61k and 62k for extracting the electric signals from the first synchro displacement detector 61 and the second synchro displacement detector 62 together with the rotating contact 54. For this reason, a method of fixing the signal lines 61k, 62k derived from the first synchro displacement detector 61 and the second synchro displacement detector 62 can be adopted, and the first synchro displacement detector 6 can be used.
The structure of the mechanism for extracting signals from the first and second synchro displacement detectors 62 can be simplified.

According to this embodiment, as described above,
The circumferential profile of the ring-shaped inspection surface 10 of the work 1 is detected as the circumferential profile of the synchro ring surface 51 of the movable synchro disk 50. Here, in the present embodiment, as described above, the diameter of the synchro ring surface 51 of the movable synchro disk 50 is set to be larger than the diameter of the ring-shaped inspection surface 10 of the work 1, so that the ring of the work 1 having a small diameter is used. The circumferential profile of the shape inspection surface 10 can be recognized by expanding the diameter as the circumferential profile of the synchro ring surface 51 of the movable synchro disk 50 having a large diameter.

In other words, FIG. 5 shows a circular locus in which the circumferential profile 10s of the ring-shaped inspection surface 10 of the work 1 is detected. FIG. 6 shows a circular locus detected by detecting a peripheral profile 51s of the synchro ring surface 51 of the movable synchro disk 50. Since the diameter of the synchro ring surface 51 of the movable synchro disk 50 is set to be larger than the diameter of the ring-shaped inspection surface 10 of the work, the diameter of the circumference of the circular locus related to the ring-shaped inspection surface 10 of the work 1 shown in FIG. The circumference L2 of the circular locus of the synchro ring surface 51 of the movable synchro disk 50 shown in FIG. 6 is longer than the length L1 (L2> L1).

Therefore, even when the diameter of the ring-shaped inspection surface 10 of the work 1 is small and its circumference is short, the first synchro displacement detector 61 and the second synchro displacement detector 62 are provided.
Can increase the number of profile detection information to be extracted. For example, as described above, the number of profile detection information can be increased to 1000 points. Therefore,
Even when the diameter of the ring-shaped inspection surface 10 of the work 1 is small, the circumferential profile of the ring-shaped inspection surface 10 of the work 1 can be detected more accurately, and the rotation axis of the ring-shaped inspection surface 10 of the work 1 can be detected. Measurement accuracy of the coordinates of the core P1 can be improved.

FIG. 8 shows an example of an exhaust manifold mounted on an internal combustion engine of a vehicle. The manifold is made of metal and has a first flange portion 101 fixed to the muffler side.
A second flange portion 102 fixed to the internal combustion engine, and a tube 104 having a plurality of tubes 103 having an exhaust gas passage provided between the first flange portion 101 and the second flange portion 102. Have.

The first flange portion 101 has a cylindrical body 104 into which a part on the muffler side is fitted. Since the muffler-side component is fitted to the outer peripheral surface of the cylinder 104, the cylinder 1
The outer peripheral surface of a ring-shaped inspection surface 10 which is an inspection target portion
It has been. The present invention can be applied not only to an exhaust manifold but also to an intake manifold of an internal combustion engine.

[0059]

According to the work quality measuring apparatus of the present invention,
A three-dimensional measuring machine is used to rotate the rotating abutment contacting the ring-shaped inspection surface of the work at least once along the ring-shaped inspection surface of the work and to continuously follow the profile of the ring-shaped inspection surface of the work. Compared to the conventional technology of measuring three points as representative values on the ring-shaped inspection surface of the work,
Even when a minute distortion that does not affect the quality occurs in the work, it is possible to reduce the variation in the measurement accuracy and to improve the accuracy of determining the quality of the ring-shaped inspection surface of the work.

According to the work quality measuring apparatus of the present invention, the work itself is rotated to rotate the rotating abutment along the circumferential direction of the ring-shaped inspection surface of the work so as to follow the ring-shaped inspection surface of the work. It is not necessary to adopt a method of causing the work to be fixed at the time of measurement. Therefore, it is suitable when the work is difficult to rotate, for example, when the whole work has a complicated shape or a different shape, and more specifically, when the work has a complicated shape like a manifold.

Further, according to the work quality measuring apparatus of the present invention, instead of rotating the work, the rotating abutment following the ring-shaped inspection surface of the work is rotated, and the movable synchro is integrated with the rotating abutment. A method in which the board rotates is adopted. This movable synchro disk rotates in the circumferential direction of the ring-shaped inspection surface of the work in synchronization with the rotation of the rotating abutment, or in the radial direction of the ring-shaped inspection surface of the work in synchronization with the displacement of the rotating abutment. Or displace. That is, while the work is fixed during the measurement, the displacement of the circumferential profile of the ring-shaped inspection surface of the work is changed by the displacement of the synchro ring surface of the rotating movable synchro disk (the circumferential displacement of the synchro ring surface, the synchro ring surface). Radial displacement) can be detected by a synchro displacement detector. Therefore, instead of rotating the synchro displacement detector at the time of measurement, a method of fixing the synchro displacement detector can be adopted. Therefore,
It is not necessary to adopt a method of rotating a signal line for extracting an electric signal from the synchro displacement detector together with the rotating contact.
For this reason, a method of fixing the signal line derived from the synchro displacement detector can be adopted, and the structure of the signal extracting mechanism from the synchro displacement detector can be simplified.

Further, according to the work quality measuring apparatus of the present invention, when the diameter of the synchro ring surface of the movable synchro disk is set to be larger than the diameter of the ring inspection surface of the work, the ring inspection of the work is performed. The circumferential profile of the surface,
The diameter can be recognized as the circumferential profile of the synchro ring surface of the movable synchro disk. Therefore, the number of profile detection information extracted by the synchro displacement detector can be increased. Therefore, it is possible to accurately detect the circumferential profile of the ring-shaped inspection surface of the work,
The measurement accuracy of the rotation axis of the ring-shaped inspection surface of the workpiece can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a rotating abutment of a work quality measuring apparatus follows a ring-shaped inspection surface of a work.

FIG. 2 is a front view of the vicinity of a movable synchro disk of the work quality measuring device.

FIG. 3 is a front view near the evacuation means.

FIG. 4 is a block diagram of a control device.

FIG. 5 is a configuration diagram showing a circular locus of a circumferential profile of a ring-shaped inspection surface of a work.

FIG. 6 is a configuration diagram showing a circular locus of a circumferential profile of a synchro ring surface of the movable synchro disk;

FIG. 7 is a side view showing the vicinity of the movable support part in a partial cross section.

FIG. 8 is a perspective view of an exhaust manifold.

[Explanation of symbols]

In the figure, 1 is a work, 10 is a ring-shaped inspection surface, 5 is a measuring unit, 50 is a movable synchro disk, 51 is a synchro ring surface,
Numeral 54 denotes a rotary abutment, 61 denotes a first synchro displacement detector, 6
2 denotes a second synchro displacement detector, 7 denotes a retracting unit, 8 denotes a control device, and 9 denotes a fixing unit.

Claims (2)

[Claims] 1. A work quality measuring device for determining the quality of a circumferential profile of a ring-shaped inspection surface provided on a work, the work fixing means for fixing the work, and abutting on a ring-shaped inspection surface of the work. A rotating abutment that rotates at least one time along the ring-shaped inspection surface of the work and that follows the circumferential profile of the ring-shaped inspection surface of the work with the rotation; A synchronous ring surface that rotates in synchronization with the rotation of the rotary abutment in the circumferential direction of the shape inspection surface and that is displaced in synchronization with the displacement of the rotary abutment in the radial direction of the ring-shaped inspection surface of the workpiece. A movable synchro disk which is fixed in the vicinity of the movable synchro disk, abuts against a synchro ring surface of the movable synchro disk, and rotates. A work quality measuring device having a synchro displacement detector for detecting displacement of a crawling surface. 2. The method according to claim 1, wherein a diameter of a synchro ring surface of the movable synchro disk is set larger than a diameter of a ring-shaped inspection surface of the work, and a circumferential profile of the ring-shaped inspection surface of the work is adjusted. A work quality measuring apparatus characterized in that the diameter is recognized as a circumferential profile of a synchro ring surface of the movable synchro disk.