JPS63162143A - Centering device - Google Patents

Abstract

PURPOSE:To permit the centering with high precision, eliminating the need of a skilled operator, by instaling a unidimensional sensor with catches the image due to the light supplied from an optical system and an image processing part which calculates the eccentricity quantity between the inside diameter of a sleeve-shaped metal fitting and the revolution center of a spindle from the signal supplied from the unidimensional sensor and the signal supplied from an encoder. CONSTITUTION:The image of a sleeve-shaped metal fitting 3 at each revolution angle is taken into a unidimensional sensor 5 according to the synchronous signal (c) supplied from an image processing part 10 during one revolution of a spindle 6. The sensor 5 returns the taken-in image as an image signal (a) into the image processing part 10. Further, the pulse signal (b) is sent as the value of the angle in the case when each image is taken in, into the image processing part 10 from an encoder 9. In the image processing part 10, the deflection quantity between the center of the inside diameter of the sleeve metal fitting 3 and the revolution center of the spindle 6 is calculated from the both input signals (a) and (b). At the initial position of revolution of the spindle 6, the sleeveshaped metal fitting 3 is shifted in the X and Y directions by a position adjustor mechanism 7 according to the above-described deflection quantity, and center adjustment is carried out.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a centering device, a cable for optically connecting fiber cables for single-source transmission, and is necessary for processing a sleeve-like metal fitting for a connector terminal. The present invention relates to a centering device for performing centering or centering necessary for machining the inner and outer diameters of a sleeve-shaped metal fitting to be concentric.

[Conventional technology]

As a conventional technique, for example, Japanese Patent Publication No. 60-15094
As shown in Japanese Patent No. 8, there is a device for centering a busy microhole.

A conventional centering device includes a collect chuck for fixing a workpiece with a microhole on a hollow spindle, an adjustment screw for aligning the spindle with the center axis of the microhole in the workpiece, and a collect chuck for fixing a workpiece with a microhole in the hollow spindle. The apparatus includes a lamp for transmitting illumination of the 9-piece, a microscope for enlarging the image of the microscopic hole of the nine-piece, and a peephole for viewing the image of the microscope.

Next, the conventional centering device f! The iK will be explained in detail with reference to the drawings.

FIG. 5 is a configuration diagram showing an example of a conventional centering device.

In the centering device shown in FIG. 5, a collect chuck 104 to which an inner sleeve 102 and a workpiece 103 are attached is inserted into a hollow spindle 101, and the inner sleeve 102 and the collect chuck 104 are connected to each other. Holds piece 103.

A centering chuck 1 is provided at the end of the hollow spindle 101.
05 and a fixing screw 106 are attached, and a plurality of adjustment screws 107 are used to align the rotation axis of the hollow spindle 1010 and the center axis of the microhole of the workpiece 103. The light from the lamp 108 is magnified by a microscope fillo mounted on the sliding table 109, and the light from the lamp 108 is
m is imaged.

Next, a centering method using a conventional centering device will be explained.

First, the workpiece 103 is fixed to the collector chuck 04. Next, the light from the lamp 108 is seen through the peephole]]1
The sliding table 109 is moved and fixed so that the light is focused. Next, while projecting the light of the lamp 108, the hollow spindle 1
Rotate 01 and measure the fluctuation of the image above. Next, the spindle 101 is stopped, and any or all of the adjustment screws 107 are finely adjusted to slightly move the centering chuck 105 so that image wobbling is minimized.

[Measurement of Image Wobble and Centering Chuck] By repeating the adjustment of 05 several times, highly accurate centering is possible.

[Problem that the invention seeks to solve]

The above-mentioned conventional centering apparatus has a difficulty in centering work in which the center of the microhole in the workpiece and the center of rotation of the spindle are aligned. That is, in the conventional centering device, the operator must judge the degree of adjustment by the adjustment screw, in other words, the amount of eccentricity, from the above-mentioned fluctuation state of the optical image of the microhole, which requires skill.

In addition, there is a drawback that the rotation of the spindle and the centering operation when the spindle is stopped must be repeated several times, which takes a long time.

[Means for solving problems]

The centering device of the present invention includes a position adjustment mechanism that is attached to a spindle and is capable of positioning within a plane perpendicular to the spindle, an encoder that detects the rotation angle of the spindle, and the position adjustment mechanism and an object to be centered. A chuck for fixing a certain sleeve-like metal fitting; a lamp for transmitting illumination of the inside of the sleeve-like metal fitting; a light guide that guides light from the lamp to the inside of the sleeve-like metal fitting; and an end face of the sleeve-like metal fitting. an optical system that magnifies the light transmitted by the lamp; a one-dimensional sensor that captures an image by the light from the optical system; The image processing unit includes an image processing unit that calculates the amount of eccentricity with respect to the rotation center of the spindle.

〔Example〕

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the present invention. Light from a lamp 1 passes through a light guide 2 and serves as transmitted illumination of a sleeve-shaped metal fitting 3, which is an object to be centered.

An image of the end of the sleeve-shaped metal fitting 3 obtained by transmitted illumination is magnified by the optical system 4 and input to the one-dimensional sensor 5. - Attached to one of the ten thousand spindles 6 is a position adjustment mechanism 7 capable of two-dimensional positioning in a plane perpendicular to the rotation axis of the spindle 6. Said position w4gM mechanism 7
The sleeve-shaped fitting 3 is fixed using the collect chuck 8. Further, the other side of the spindle 6 has a spindle 6
An encoder 9 for determining the zero rotation angle is attached. The image signal a from the one-dimensional sensor 5 and the pulse signal from the encoder are sent to the image processing unit 10, where the eccentricity between the center of rotation of the spindle 60 and the center of the inner diameter of the sleeve sleeve metal is calculated and displayed. be done.

Next, the operation of this device will be explained. - Attach the sleeve-shaped metal fitting 3, which is the object to be centered, to the position adjustment mechanism 7 using the collect chuck 8. Next, the spindle 6 is rotated from the initial rotation position. spindle 6
During one rotation, images of the sleeve-shaped metal fitting 3 at each rotation angle are captured by the one-dimensional sensor 5 in response to a synchronization signal C from the image processing section 10. The one-dimensional sensor 5 sends the captured image to the image processing section 10 as an image signal a. Further, a pulse signal from the encoder 9 is similarly sent to the image processing section 10 as the value of the angle at the time of counting each image.

The image processing section 10 calculates how far the center of the inner diameter of the sleeve-shaped metal fitting 3 deviates from the center of rotation of the spindle 6 based on the input image signal a and the pulse signal S. In this case, in a plane perpendicular to the spindle 6, the scanning direction of the one-dimensional sensor is defined as the X direction, the direction perpendicular thereto is defined as the Y direction, and the amount of deviation in the X-Y direction is calculated.
'-' Next, according to the calculated amount of deviation, at the initial position of one rotation of the spindle, the position adjustment mechanism 10 moves the sleeve-shaped metal fitting 3 in the X-Y direction for alignment.Next, the image processing unit 10 Explain the operation.

FIG. 2 is a schematic diagram of the image processing unit 10. The synchronization generation circuit 11 outputs a synchronization signal C according to a preset number of data to be extracted during one rotation of the spindle 6. The image signal a is taken out from the one-dimensional sensor 5 in response to the synchronization signal cK and inputted to the image detection circuit 12. On the other hand, the pulse signal from the second encoder 9 is taken out and inputted to the counter circuit 13.

The process and image detection circuit 12 detects the process of the image signal a.

The coordinate d is extracted and input to the minimum value calculation circuit 14 and the maximum value calculation circuit 15. The minimum value calculation circuit 14 and the maximum value calculation circuit 15 compare each input of the edge coordinate d with the minimum and maximum values of the previous edge coordinate, and store and output the minimum coordinate value e and the maximum coordinate value f.

The amplitude calculation circuit 16 calculates the difference between the minimum coordinate value e and the maximum coordinate value f, and stores and outputs the shake amount g.

The encoder circuit 13 stores the pulse signal from the encoder 9 when the synchronizing signal C is input, and outputs a count number.

The angle storage circuit 17 takes in the count number when inputting the maximum value detection signal 5 outputted when the maximum value is detected in the maximum value calculation circuit 15, and stores it as the angle j at the time of maximum value detection.

The eccentricity calculation circuit 18 takes in the runout g and the maximum input waiting angle j at the time when it receives the rotation end signal k output from the counter circuit 13 at the end of one rotation of the encoder 9, and calculates the eccentricity 1 and the alignment value. The adjustment amount m in the X-Y direction is calculated and displayed by the display circuit 19.

FIGS. 3(a) and 3(b) are diagrams for explaining the state of eccentricity and the output of the one-dimensional sensor.

FIG. 3(a) shows the state of the sleeve-shaped fitting 3 at the initial rotation position. If the amount of deviation of the inner diameter center 21 of the sleeve-shaped metal fitting 3 with respect to the rotation center 20 is eccentricity [22], then the adjustment amount for centering is the X adjustment amount ΔX2 in the X and Y directions.
3. The output of the one-dimensional sensor at this time is as shown in FIG.

That is, by determining the coordinates d of the sensor output, the circumferential position of the inner diameter can be determined.

FIGS. 4(a), 4(c), and 4(c) are diagrams for explaining the eccentricity calculation method.

FIG. 4(a) shows FIG. 3(a) in which the sleeve-shaped fitting 3 is rotated about the rotation center 20, and the inner diameter center and machining/jigging coordinates move with the rotation.

FIG. 4(b) is a diagram showing changes in the machine and j coordinates due to rotation.

From FIG. 4 fan, (b), when the center of the inner diameter is rotated on the , that is, the direction of eccentricity from the center of rotation.

Moreover, as shown in FIG. 4(C), the edge coordinate failure position t? I
At a position rotated by 180° from t28, the mechanical and mechanical coordinates become minimum, and the eccentricity 11d122 becomes half of the maximum coordinate value f and the minimum coordinate value e, that is, half of the runout of 1 kg. Therefore,
The X adjustment amount ΔX23 and the Y adjustment amount ΔY24 are as follows: ΔX; runout tit/2 ・coSL9m = d
l @ Cog f1mΔY = runout @ / 2 e si
n#m=dl@sir1m.

〔Effect of the invention〕

The centering device of the present invention has an image processing section that automatically measures the amount of eccentricity instead of visually observing the next row of eccentricity between the rotating shaft and the object to be centered and performing alignment. The amount of eccentricity and the amount of adjustment for centering can be determined in a standard manner. Therefore, when performing centering, there is an effect that highly accurate centering can be performed in a short time without requiring a skilled person.

Furthermore, when capturing an image of the object to be centered, using a one-dimensional sensor allows images to be obtained at a higher speed and higher resolution than a two-dimensional image sensor, and highly accurate measurement results are required.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
A professional diagram of the image processing unit shown in the figure, Figure 3 (a), (
b) Ha! Figure 4 (a), (b), (c
) is an operation explanatory diagram for explaining the calculation method in the eccentricity calculation circuit shown in FIG. 2, and FIG. 5 is a side view showing a conventional example. 1...Lamp, 2...Light guide%
3... Sleeve-shaped metal fitting, 4... Optical system, 5... One-dimensional sensor, 6... Spindle, 7... Position adjustment Mechanism, 8...
Collect chuck, 9...Encoder, 10.
...Image processing unit, 11...Synchronization generation circuit, 12...Mechanism, Ji detection circuit, 13...
Kakunta circuit, 14... Minimum value calculation circuit, 15
... Maximum value calculation circuit, 16 ... Amplitude calculation circuit, 17 ... Angle storage circuit, 18 ...
...Eccentricity calculation circuit, 19...Display circuit, 1.
...Eccentricity, m...Adjustment amount, 20...
... Center of rotation, 21 ... Center of inner diameter of sleeve-shaped metal fitting, 22 ... Eccentricity fidl, 23 ...
...X#4F! i amount ΔX, 24...Y adjustment amount ΔY, 25...Inner diameter circumference, 26...Rotation angle θm, 27...Rotation initial position, 28 ...
・・・Maximum position of machining and ji coordinates, a...image signal, b...pulse signal,
C... Synchronization signal, d... Work, Ji coordinates,
e: Minimum coordinate value, f: Maximum coordinate value, g: Runout amount, h: Number of force 9 points,
i...Maximum value detection signal, j...Maximum value input waiting angle, k...Rotation end signal, l...
...Eccentricity, mga 200,003 Figure 7//--Ichichukenzudondol
μ6---Wong 1Z---I〉Tazuri-7°'
l/q--Issuri◆Force included βυ--
-7-Coupice f/l)-
Ichiichi Kensho U Helmet/14---Collect±-Duku
f//--Ichiki Isata, Le 8°----
Nishicha, ・7ri,ril--Ikkami Sada Neity7-@Move 5111

Claims (1)

[Scope of Claims] A position adjustment mechanism attached to a spindle and capable of positioning within a plane perpendicular to the spindle, an encoder that detects the rotation angle of the spindle, and a sleeve-shaped object that is centered with the position adjustment mechanism. a chuck that fixes the metal fitting; a lamp that performs transmitted illumination of the inside of the sleeve-shaped metal fitting; a light guide that guides the light of the lamp to the inside of the sleeve-shaped metal fitting; and a light guide that guides the light of the lamp to the inside of the sleeve-shaped metal fitting; an optical system that magnifies light; a one-dimensional sensor that captures an image by the light from the optical system; and an inner diameter of the sleeve-shaped fitting and rotation of the spindle based on a signal from the one-dimensional sensor and a signal from the encoder. A centering device comprising: an image processing unit that calculates an amount of eccentricity with respect to the center.