JPS63306879A - Correcting method for grinding wheel - Google Patents

Abstract

PURPOSE:To permit a grinding wheel to easily perform its setting and shaping being left as mounted on a machining device by using a setting tool, mounted on a part holding an optical fiber connector of machining object, and a shaping tool mounted on a tool mounting part provided in a position separate from the setting tool. CONSTITUTION:In order to correct a grinding wheel 3, first a setting tool 90 is mounted in a positioning condition to a mounting position of an optical fiber connector in place of this optical fiber connector. Next the grinding wheel 3, while it is rotated in a high speed performing a reciprocating feed motion, performs a setting motion with the tool 90 by moving it reciprocating rotating on its own axis and reciprocating swiveling. Hereafter mounting a tool holder 30 on a tool mounting part 23 and pressing a shaping tool 32 in the inside of the tool holder on the peripheral surface of the grinding wheel 3 by a pressing means (comprising a pressing rod 33 and a coil spring 33a), the grinding wheel 3, which is given a rotary and feed motion finishing the setting motion, performs shaping of the peripheral surface.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a processing device for grinding the end face of an optical fiber connector into a conical shape, and more particularly to a method for modifying a grinding wheel.

BACKGROUND OF THE INVENTION Fiber optic connectors for optical communications or fiber optic sensors are commonly used to optically couple two optical fibers. During this optical coupling, the end faces of the optical fibers to be joined are processed into a convex spherical or convex aspheric mirror surface during factory production or on-site connection in order to minimize coupling loss. Ru. Such spherical processing is performed by directly grinding the flat surface of the optical fiber into a spherical surface, and then polishing the spherical surface to obtain a final spherical surface.

Prior Art This type of processing equipment has become more popular with the commercialization of optical communication systems.
It has been put into practical use in various models. In both cases, a grindstone is used as the grinding means, but if it is used continuously for a long period of time, it will wear out, so correction work such as sharpening and shaping will be required at an appropriate time. As in the past, such grindstone corrections are performed by removing the grindstone from the processing equipment and using a special correction machine.For this reason, it is essential to remove the grindstone and attach it to the correction tool. Since the setup is complicated, it is inappropriate for on-site correction work.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to enable easy correction of a grindstone to be corrected while it is attached to a processing device, without using a dedicated correction machine.

Solution to the Invention This type of processing device rotates the grindstone at high speed,
Equipped with a function to feed in the processing direction. Focusing on this function, the present invention attaches a sharpening tool to the part that holds the optical fiber connector to be processed, and performs the sharpening work by rotating the grindstone at high speed in the same way as when grinding the target. A tool attachment section is provided at a separate location from the tool attachment section, and a shaping tool can be attached to this tool attachment section as needed.
While rotating the grindstone at high speed and moving it in the feed direction, a shaping tool is pressed against the grindstone surface so that the outer peripheral surface of the grindstone can be shaped.

According to such a correction method, there is no need to attach or detach the grindstone to be corrected, and corrections can be made even while it is attached to the processing equipment, and the grindstone and grindstone axis are removed during the grinding process and before and after correction of the grindstone. Since there is no change in the installation relationship with
High accuracy can be expected in the subsequent grinding process.

Structure of Processing Apparatus FIGS. 1 to 4 show the overall structure of a processing apparatus 1 used for carrying out the method of the present invention.

This processing device 1 includes a grindstone 3 that can rotate at high speed, a support member 4 of the optical fiber connector 2, and a device that provides necessary movement to these components in order to grind the coupling side end face of the optical fiber connector 2 to be processed into a conical shape. A motor 5 is provided as a common drive source.

The optical fiber connector 2 is assembled in a fixed state with an adhesive or the like, with the optical fiber 2b passing through the inside of a cylindrical ferrule 2a, and is rotatable by a collet chuck 6 at one end of the support member 4. Supported by That is, the support member 4 is located above the base 7 and the bearing on the processing chamber 17 is connected to the swing axis 9 in the horizontal direction with respect to the block 8.
The collet chuck 6 is rotatably supported in a substantially vertical direction by upper and lower bearings 11 inside the housing 10, and a bearing at the front end of the collet chuck 6 is supported so as to be able to swing around the collet chuck 6 as a fulcrum. As shown in FIG. 5, the collet chuck 6 supports a collet 13 in a non-rotating state inside the collet sleeve 12 so as to be movable in the axial direction, that is, in the vertical direction.

The collet sleeve 12 is connected to the gear 14 at the upper end portion.
The lock dial 15 is connected to the lock dial 15 and the lock dial 16 is connected to the lock dial 15 by a screw pair at the upper end thereof.

Further, the grinding wheel 3 is, for example, of a sunken dovetail type, and is located inside the processing chamber 17 with a horizontal grinding wheel shaft 18.
It is removably supported on the tip of the. This grindstone shaft 18 is rotatably supported by front and rear bearings 20 inside the grindstone head 19, and has a spline shaft 2 at the rear end.
1 and is fitted into the spline cylinder 22 at this portion.

The spline cylinder 22 is rotatably supported by a support block 23 on the base 7 by front and rear bearings 24. The front bearing 20 is connected to the grinding wheel head 1.
On the front side of the bearing 9, the bearing is prevented from being removed by a reference member 25 which also serves as a presser. This reference member 25 is provided for positioning the optical fiber connector 2,
Although a groove 25b is formed on the upper reference surface 25a,
At the same time, on the front side, the recessed part of the whetstone 3 and the whetstone shaft 18
Together with the circumferential protrusions, a labyrinth is formed, and the machining chamber 17 is sealed against the grinding liquid 26 such as water.

In addition, the processing chamber 17 is equipped with a transparent M21 that can be attached and detached at an opening on the side for replacing the grinding wheel 3, and is also equipped with a transparent M21 on the front side and a contact position between the grinding wheel 3 and the optical fiber connector 2. Tool attachment part 28 and liquid supply port 29a at different positions,
A drain plug 29b is provided. As shown in FIG. 1, the camp 31 is detachably attached to the tool attaching portion 28 by, for example, a bayonet mechanism. When repairing the grindstone 3, remove the cap 31 from the tool attachment part 28.
is removed, and the tool holder 30 is attached thereto.

As shown in FIG. 6, this tool holder 30 has a cylindrical shape as a whole, and stores therein a shaping tool 32 for shaping the grindstone surface of the grindstone 3. As an internal pressing means, The pressing rod 33 and the coil spring 33a, which are in a non-rotating state, always press the grindstone 3 against the grindstone surface with a constant force.

On the other hand, as seen in FIG. 7, the grinding wheel head 19 can be moved forward and backward by linear movement in the axial direction of the grinding wheel shaft 18 with respect to the rectangular sliding guide surface 34 on the base 7 by means of a feeding table 87. They are assembled together in a state in which they are biased toward the right in FIG. 4, that is, in the backward direction, by a compression spring 36 provided between the side surface of the processing chamber 17 and a spring receiver 35 below the grinding wheel head 19. Further, the cam follower 37 of the 35 spring receivers is always in contact with the cam surface of the cam 38 such as the end cam due to the biasing force of the compression spring 36 in the backward direction. The cam 38 is rotatably supported horizontally by a bearing on a camshaft 39 integral with the cam 38, and is connected to a dog 40 and a timing boob IJ41 at its end. . This dog 40 corresponds to a limit switch 40a. The sliding guide surface 34, the feeding table 87, the compression spring 36, the cam follower 37, and the cam 38 constitute a feeding means for the grindstone 3.

By the way, the motor 5 is mounted on the support member 4 on the base 7.
The motor shaft 42 is connected to a large pulley 43 and a worm 44, as shown in FIG.

The rotational force of this pulley 43 is transmitted to the grindstone shaft 18 at increased speed through a belt 46 wrapped around this pulley 43 and a small pulley 45 attached to the spline shaft 21. The rotation of the worm 44 is also transmitted to the worm wheel 49 of the vertical intermediate shaft 48 inside the gear box 47, as shown in FIG. This intermediate shaft 48 is supported by upper and lower bearings 50 inside the gear box 47, and is supported by two V-pulleys 53, 54 and a round belt 55.
As a result, the rotational motion is transmitted to the crankshaft 56 as a revolution around the fixed shaft 80, and as shown in FIG. The signal is transmitted not only to the timing pulley 41 but also to the timing pulley 60 via the timing belt 61 by the worm shaft 57 supported by a bearing 58 inside the worm shaft 57 and the timing pulley 59 .

As shown in FIGS. 11 and 12, this timing boot rotates 9,600 times. As shown in FIGS.
A bevel gear 63 fixed to a shaft 62 supported by a bevel gear 6 meshes with a bevel gear 64 fixed to a shaft 65 in a direction intersecting with the bevel gear 63, thereby transmitting rotation to the shaft 65. This shaft 65 is horizontally supported by a bearing 66 relative to a block 88, and is connected at its tip to a cam 67 and a dog 68, each having a disk shape, for example, for setting the amount of cutting. Note that this dog 68 is a limit switch 69.
It corresponds to

The cam 67 is a driving means for the support member 4, and forms a contour curve as shown in FIG. The radius of this contour curve increases little by little with respect to the base circle in the rotation angle range of 0'' to 210 degrees at the reference stop position, and this increase amount is increased to 30 degrees, 120'', and 210 degrees.
The rotation angle is decreased from 210 to 27.
0” is the same diameter as the maximum diameter, 2700 to 360° (
0°), it gradually becomes smaller and matches the radius of the original base circle. The cam 67 is in contact with the lower surface of the angle adjustment wedge 70 on the rear end side of the support member 4 on the upper surface of its outer periphery. The angle adjustment wedge 70 is movable only in the longitudinal direction of the support member 4 and in the direction of the grindstone shaft 18 with respect to the lower surface of the support member 4, and its position can be adjusted by the adjustment screw 71. There is. The support member 4 is tilted downward at the rear end side of the swing shaft 9 by a tension spring 74 provided between the spring hook 72 of the support member 4 and the spring hook 73 of the base 7. Since it is biased, the lower surface of the angle adjusting wedge 70 is always in contact with the upper surface of the cam 67.

Furthermore, as shown in FIG. 14, this support member 4 also comes into contact with the upper surface of a manual eccentric cam 75 for positioning at another lower surface portion.

The manual eccentric cam 75 is rotatably supported in the horizontal direction by a bracket 76 on the support block 23 at its shaft portion, and is connected to a manual knob 77 at its outer tip. The manual lifting limit of the support member 4 is regulated by the abutting relationship between the perforator 78 on the support member 4 side and a stopper screw 79 screwed into the bracket 76.

In this way, the support member 4 supports the optical fiber connector 2 with a small arm length on the front side with the swing shaft 9 as a fulcrum, and also supports the optical fiber connector 2 with a large arm length on the rear side of the swing shaft 9. It is designed to be driven by a cam 67. Note that the ratio of these arm lengths is set, for example, to 1:4, as shown clearly in FIG. 16A. Note that the support member 4
The limit switch 4a, which contacts the rear part of the support member 4, is a switch that detects whether or not the support member 4 is being raised by the manual eccentric cam 75, and prohibits the grinding operation when the support member 4 is raised.

On the other hand, the V-pulley 54 is rotatably supported by a bearing 81 on the upper surface of the support member 4 with respect to a fixed shaft 80 extending in the vertical direction. The crankshaft 56 is located at an eccentric position of the V-pulley 54 and is connected to an eccentric shaft 84 of a reciprocating gear 83 via a link 82 . As a result, the support member 4, the V-pulley 54 serving as a crank, the link 82, and the reciprocating rotating gear 83 serving as a lever constitute a lever crank mechanism, and the continuous rotation of the V-pulley 54 in one direction is controlled by the reciprocating rotating gear. By converting the reciprocating rotational motion of the optical fiber connector 83 into a reciprocating rotational motion, the collet chuck 6 and the gear 14 function as a reciprocating rotation means for the optical fiber connector 2. The reciprocating gear 83 is rotatably supported by the support member 4 by a shaft 85 and a bearing 86 that are integral with the reciprocating gear 83, and meshes with a small gear 14 fixed to the collet sleeve 12 of the collet chuck 6. There is. Note that, as shown in FIG. 15, this gear 14 can be prevented from rotating by a stop pin 89 that is movable in the axial direction.

Operation of the processing device First, before grinding, the cam follower 37 is in contact with the maximum lift position of the cam 38, so the grinding wheel head 19 is at the first
As shown in Figure 6A, it is stopped at the maximum forward position. At this time, the reference surface 25a of the reference member 25 faces below the center position of the collet chuck 6.

In this state, the worker operates the manual knob 77 and rotates the manual eccentric cam 75 approximately half a turn, thereby pulling the rear part of the support member 4 and causing the spring 7 to move as shown in FIG. 16B.
4 and rotate the supporting member 4 around the swing shaft 9 until it hits the stopper screw 79. The tip of the supporting member 4 moves downward, thereby pushing the lower end of the collet chuck 6. It is brought close to the reference surface 25a.

Therefore, the height of the collet chuck 6, that is, the distance between it and the reference surface 25a, can be set to an appropriate position by turning the stopper screw 79, and the cutting amount can be adjusted 1:1 by this screw 79. After this, the worker collects)
Insert the optical fiber connector 2 to be processed into the center hole 1.3, and as shown in FIGS. When the lock nut 16 is rotated in the tightening direction, the lock nut 16 moves upward, so that the collet 13 is deformed in the diameter reduction direction by the tapered surface of the collet sleeve 12, and holds the outer peripheral portion of the ferrule 2a of the optical fiber connector 2. A groove 25b in the moving direction is formed in the reference surface 25a, and since the outer peripheral side of the processed end surface of the optical fiber connector 2 hits the reference surface 25a, the positioning accuracy can be maintained even if adhesive or the like is attached to the processed end surface. There is no effect on Note that during this time, the collet chuck 6 is set in a non-rotating state by the stop pin 89.

In this way, the optical fiber connector 2 is fixed within the collet chuck 6 while being positioned relative to the support member 4 in the height direction. In this state, if the worker turns the manual eccentric cam 75 half a turn in the opposite direction, the angle adjustment wedge 7
0 is the reference stop position of the cam 67, that is, the rotation angle is 0.
It touches the position of °. Therefore, the support member 4 has a predetermined inclination angle, and in this state, the processed end surface of the optical fiber connector 2 is aligned with the reference surface 25a as shown in FIGS. 16E and F.
It is held at a predetermined height. In addition, the angle adjustment wedge 7
0 by the adjustment screw 71, the conical angle of the tip of the optical fiber connector shown in FIG. 18 can be adjusted. This adjustment only needs to be done once.

After such preparatory operations, when the worker gives a start command to the motor 5 and causes it to rotate, the rotation of the motor shaft 42 causes the pulley 43, 45 and belt 46, as well as the spline shaft 21 and the spline cylinder 22 to rotate. It is transmitted to the grinding wheel shaft 18 through the accelerating state. As a result, the grinding wheel 3 is
7 while immersed in the grinding fluid 26, the circumferential speed is 1800.
It rotates at a high speed of about (m/+n1n). At the same time, the rotation of the motor shaft 42 is caused by the rotation of the worm 44 and the worm wheel 49.
, an intermediate shaft 48, a worm 51, a worm wheel 52, etc., and a timing pulley 41.5.
9.60 and timing belt 61, it is finally transmitted to cam 38 and cam 67. In this way, when the cam 38 rotates once during one machining cycle, it cooperates with the elasticity of the compression spring 36 to move the grinding wheel head 19 backward during a half rotation, and in the forward direction during the subsequent half rotation. move it to As a result, as shown in FIG. 16G, the grindstone 3 returns to its original forward limit position by moving backward and forward in the linear direction during one machining cycle while rotating at high speed.

On the other hand, the cam 67 rotates once during one machining cycle, pushes up the rear end of the support member 4 within a rotation angle range of O'' to 30'', lowers the optical fiber connector 2 at the tip a little, and then Rough grinding is performed by giving the optical fiber connector 2 a cutting depth in the direction of pressing it against the outer peripheral surface of the grinding wheel 3, that is, the grinding wheel surface, at a rotation angle of 30° to 120', and a light beam is applied at a rotation angle of 120" to 210". Finish grinding is performed by reducing the amount of cut of the fiber connector 2 (this cam 67 has a rotation angle of 210
@ When rotated, the fiber optic connector 2 will be in a spark-out state and continue until 270" and then continue for the remaining rotation angle 9
It returns to its original position within the range of 0''.Of course, the cam 38
Since the cam 67 and the cam 67 are rotating in synchronization, the cam 67
During the half-rotation, the grinding wheel 3 moves backward and contacts the processed end surface of the optical fiber connector 2 with its grinding wheel surface. During the subsequent half-rotation, the grinding wheel 3 moves forward while processing the optical fiber connector 2. It will touch the end face.

In this way, during one machining cycle, the cam 67 pulls the rear end portion of the support member 4 and pushes it up against the spring 74, so the support member 4 swings about the swing shaft 9.
By repeating the up-and-down motion, as shown in FIG. 17, the optical fiber connector 2 is pressed against the grinding surface of the grinding wheel 3 while tilting it at a predetermined angle on the vertical plane. Become. Therefore, the amount of grinding increases little by little from the center to the outer periphery of the optical fiber connector 2 so as to finally form a conical surface. In the process of setting the inclination angle, the amount of displacement of the optical fiber connector 2 with respect to the cam 67 is reduced to 1/4 of the arm length around the fulcrum of the support member 4. Therefore, the setting of the inclination angle and the amount of incision for the optical fiber connector 2 are not directly controlled by the machining accuracy of the contour curve of the cam 67, and can be performed with high precision.

By the way, while the grinding wheel 3 is rotating at high speed and repeating a reciprocating feeding motion, and while the optical fiber connector 2 is repeating a rocking motion on a vertical plane, the rotation of the motor shaft 42 is caused by the pulleys 53 and 54. This is applied to the crankshaft 56 as an eccentric rotational motion via the round belt 55, and further converted into a reciprocating rotational motion by the link 82 and the reciprocating rotating gear 83. For this reason, Koreft Chasok 6 is the 17th
As shown in the figure, receiving the reciprocating rotational movement of the gear 14,
At a rotation angle of 0° or more, the optical fiber 2b repeats reciprocating rotation around the axis of the optical fiber 2b within a torsional rotational tolerance range. As a result, the grinding wheel surface, that is, the outer circumferential surface of the grinding wheel 3 comes into contact with the processed end surface of the optical fiber connector 2 at all positions, so that a flat surface is always maintained without being partially worn.

In this way, in the end, the optical fiber connector 2 performs one reciprocating oscillating motion on the vertical plane during one machining cycle while repeating reciprocating rotational motion with respect to the grinding wheel surface of the grinding wheel 3, so that the ferrule 2a and the optical fiber 2b The machined end surface is finally ground into a conical surface as shown in FIG. While the optical fiber connector 2 makes one reciprocating tilting (swinging) motion once in one processing cycle, the rotation speed of the optical fiber connector 2 is set at a high rotational speed. The center line of the cone after processing is not inclined with respect to the axial direction of the optical fiber connector 2, and its apex coincides with the center line of the optical fiber 2b, that is, the center of the optical axis, with high accuracy. As is already clear,
Collet chuck 6 is used to position the optical fiber connector 2.
Since the process is performed with the machine in a lowered state, the processed end face of the optical fiber connector 2 before processing or the conical surface after processing is in a state away from the grinding wheel 3 and the reference member 25 at the beginning of a series of processing cycles or when the processing is completed. , and it does not correspond to that.

The above series of operations includes the starting operation and the limit switch 4.
It is controlled by a sequence control section using signals from 0a and 69 as input.

Grindstone correction method of the present invention When a large number of optical fiber connectors 2 are processed continuously,
The outer peripheral surface of the whetstone 3, that is, the whetstone surface, is worn and becomes uneven. Therefore, it is necessary to repair the whetstone at an appropriate time.

First, in the grindstone grinding process, as shown in FIG. 19, a G
Attach the sharpening tool 90 such as O in a positioned state,
In this state, while applying high-speed rotation and reciprocating motion to the grindstone 3 to be repaired, reciprocating rotational movement and reciprocating rocking movement are applied to the sharpening tool 90, thereby performing a movement similar to the grinding process of the optical fiber connector 2.

Next, the grindstone shaping work is carried out by removing the cap 31 from the tool attachment part 28 and attaching the tool holder 3 thereto, as shown in FIG.
0 is attached, and the shaping tool 32 therein is pressed against the outer circumferential surface of the grinding wheel 3 using a pressing rod 33 as a pressing means and a coil spring 33a to give rotation and feeding motion to the grinding wheel 3, as shown in FIG. Do it while doing it. Note that when the elastic force of the coil spring 33a is weak (or the shaping is insufficient), the worker actively applies pressure to the pressing rod 33 from the outside.Of course, the width of the shaping tool 32 is Since the width of the grinding wheel surface of the grinding wheel 3 is approximately equal to that of the grinding wheel 3, and is provided within the range of its feeding movement, such correction work can be performed in the same manner as the grinding operation. A dummy work is attached to the collet 13 in such a manner that it does not protrude from the lower end surface of the collet 13 to prevent the collet 13 from coming into contact with the grindstone.

When the grinding wheel surface of the grinding wheel 3 is corrected in this way, its outer diameter becomes smaller, so in the subsequent processing step, when the optical fiber connector 2 is positioned in the same way as before the correction, the cutting depth will be as follows. It will be less than last time. To make this adjustment, slightly return the stopper screw 79 and
This can be done by increasing the amount of rotation of the support member 40 by the amount by which the grindstone 3 is reduced. In this way, the subsequent optical fiber connector 2 is accurately positioned in accordance with the actual outer diameter dimension of the grinding wheel 3, making it possible to continuously grind a fixed amount of the optical fiber connector 2. .

Modification of the Invention In the above embodiment, sharpening is performed only at the position of the collet chuck 6, but this sharpening can also be performed at the position of the tool holder 30 at the same time.

Effect of the invention The present invention provides the following unique effects.

First, since the grindstone can be corrected without using a dedicated correction machine, the sharpness of the grindstone surface and correction work can be done on P34B.
And it can be done quickly.

In addition, the sharpening and correction work of the grinding wheel surface can be done using the functions of the processing device, that is, the high-speed rotational movement and linear feed movement of the grinding wheel, and can be done while the grinding wheel is attached to the grinding wheel shaft. It can be used effectively and is suitable for on-site correction.

Furthermore, since the grinding wheel is not attached to or detached from the grinding wheel shaft during correction, there is no change in the mounting condition during correction and the mounting condition during grinding after correction is completed, so stable and highly accurate grinding can be achieved in mVt. It becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a front view of an optical fiber connector processing device according to the present invention, Fig. 2 is a plan view of the same device, Fig. 3 is a side view of the same device, and Fig. 4 is a vertical cross section as seen from the front of the device. Figure, 5th
The figure is an enlarged view of the collet chuck, Figure 6 is a sectional view of the tool attachment part, Figure 7 is a sectional view of the sliding guide part of the grinding wheel head,
Fig. 8 is a horizontal sectional view of the output part of the motor shaft, Fig. 9 is a vertical sectional view of the deceleration part of the motor shaft, Fig. 1O is a horizontal sectional view of the deceleration part, and Fig. 11 is a horizontal sectional view of the rotation transmission part. , FIG. 12 is a vertical sectional view of the driving part of the cam, FIG. 13 is an enlarged contour view of the cam, FIG. 14 is a vertical sectional view of the manual eccentric cam part, and FIG. 15 is a sectional view of the detent part of the gear. Figure 16A
-G is an explanatory diagram of the machining operation, Fig. 17 is an explanatory diagram of the movement, Fig. 18 is an explanatory diagram of the grinding state, Fig. 19 is a front view when the sharpening of the grindstone is corrected, and Fig. 20 is an illustration when the grindstone is corrected. FIG. ■... Processing equipment, 2... Optical fiber connector, 3... Grindstone, 4... Support member, 5... Motor, 6... Collet chuck, 9... Swing axis, 15... Lock dial, 17
...Processing chamber, 18.. Grinding wheel shaft, 21.. Spline shaft,
25... The bearing is a reference member that also serves as a presser, 25a... Reference surface, 28... 2 [tool attachment part, 30... Tool holder,
32... Shaping tool, 33... Pressing rod, 34... Sliding guide surface, 36... Compression spring, 38... Cam, 56...
Crankshaft, 67...Cam, 70...Angle adjustment wedge, 74...Tension spring, 75...Manual eccentric cam, 7
8. Per degree, 79. Stopper screw, 83. Reciprocating rotating gear, 84. Eccentric shaft, 90. Sharpening tool. 1:; 34a72:3 as 4゜Figure 2 84 8284 Figure 3 Figure 4 = Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Wisdom Figure 70 Figure 71 Sheet 12 Figure 75 Figure 77 Figure 79 Figure Z

Claims (1)

[Claims] In a processing device that grinds the tip of an optical fiber connector by pressing an optical fiber connector against the circumferential surface of a grinding wheel that rotates at high speed and moving the grinding wheel relatively in the direction of the rotation axis, the grinding wheel is placed at a position different from the position where the optical fiber connector hits. A tool attachment part is provided which comes into contact with the circumferential surface of the grindstone to shape the grindstone via means for pressing on the side, and a dressing tool is attached in place of the optical fiber connector to be processed, and the dressing is performed by the processing operation. A grindstone repair method characterized by attaching a shaping tool to a tool attachment part and pressing the repair tool against the grindstone with a constant force to shape the grindstone.