JP2610930B2 - Grinding equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an apparatus for precisely grinding an end face of an optical fiber connector or the like.

Prior art Patent applicant has filed the invention of Japanese Patent Application No. 62-14973.
We propose a processing machine for grinding. Although the above-mentioned processing machine has a function necessary for grinding a work, it has the following disadvantages. In the grinding by the above processing machine, in order to process the convex spherical surface,
The work requires a rubbing motion, but no specific method of moving the grindstone in that case is described, and the processing machine itself is not unitized.

Object of the Invention Here, the object of the present invention is to realize a high-precision machining by unitizing this kind of grinding apparatus, providing the necessary functions inside the unit, and making the rotation supporting portion highly rigid. It is to be.

Means for Solving the Problems Under the above objects, the present invention provides a support frame inside a fixed guide, which rotatably supports a hollow revolving shaft and a rotating shaft eccentric to the revolving shaft, and an upper end of the rotating shaft. The rotating grinding body is supported in such a manner that it can revolve while revolving, and the revolving shaft is displaced in the axial direction by an annular fixed cam so that a grinding feed motion is given to the rotating grinding body.

As described above, since the grinding device is assembled in a state of being assembled inside the fixed guide, this device can be easily assembled at a predetermined position such as a dedicated processing machine of a rotary index system. In addition, since the rotating grinding body is rotatably supported in a highly rigid state by the support frame, the revolving shaft and the rotating shaft inside the fixed guide, the grinding process is enhanced as much as possible in comparison with the conventional device. .

Configuration of the Invention FIGS. 1 to 4 show the overall configuration of a grinding apparatus 1 of the present invention.

This grinding device 1 is incorporated inside a fixed guide 2. That is, the fixed guide 2 is, for example, cylindrical and is attached to the mounting hole of the horizontal frame 3 in an inclined state with the tapered ring seat 4 interposed therebetween. Inside, a cylindrical support frame 6 is held movably up and down. And this support frame 6
In the center position, the hollow revolving shaft 8 is rotatable by the upper and lower bearings 7, and the revolving shaft 10 is vertically and intermediately mounted inside the eccentric hole 9 in the axial direction of the revolving shaft 8.
It is supported rotatably. As a result, the rotation axis
Reference numeral 10 is supported in a state where it is displaced from the center line of the revolution shaft 8 by a predetermined eccentric amount.

The upper and lower bearings 7 are fixed in the support frame 6 by a bearing seat 12, a spacer 13 inside the support frame 6, and a bearing presser 14 fixed to the upper surface of the support frame 6 together with the sealing material 5. The revolving shaft 8 is prevented from falling off by the upper flange portion 15 of the shaft 8 and the lower gear 16 serving also as a nut. Similarly, the bearing 11 is fixed inside the revolving shaft 8 by a lower bearing seat 17, a spacer 18, and a bearing retainer 19 attached to the upper surface of the revolving shaft 8.

The rotation shaft 10 is kept in the axial direction with respect to the bearing 11 by an upper mounting flange 20 and a lock nut 21 at an intermediate position with respect to the bearing 11, and together with a bearing presser 19 below the upper mounting flange 20. A bolt 24 that forms a labyrinth seal 22 and is integral with the rotation shaft 10 on the upper surface
The rotating grinding body 23 is fixed by a nut 25 fitted on the rotating grinding body 23.

On the other hand, the lower end portion of the fixed guide 2 is closed by the cam plate 26. The cam plate 26 integrally forms an upwardly-facing annular fixed cam 27 around the hole while allowing the orbital movement of the revolving shaft 8 at the center hole. This fixed cam
27 forms a cam profile having a predetermined gradient for rapid traverse, machining, finishing, sparking out and rewinding in one rotation angle, as shown in the development view of FIG. The lower end of the roller 28 is in contact with a cam roller 29 supported by a horizontal pin 30. The intermediate shaft 28 can move in the axial direction together with the fixed shaft 31 inside a hole formed in the thick portion of the revolution shaft 8, and the detent pin 32 on the revolution shaft 8 and the long groove 33 on the middle shaft 28. Is supported in a detented state. In addition, the fixed shaft 31 is
It is inserted below the screw pair by a male screw, and can be fixed at an appropriate screwing position by a detent screw 34 screwed into the bearing retainer 19. The supporting frame 6 is fixed to the outside of the fixed guide 2 by a spring hook 38 and the supporting frame 6, and is provided between a spring hook 39 protruding to the outside from a long hole 40 of the fixed guide 2. It is urged downward by an urging spring 41 as urging means. For this reason, the cam roller 29 is always in contact with the upper surface of the fixed cam 27.

The original position sensor 35 corresponding to the rotation angle of 0 ° on the upper surface of the cam plate 26, and the position of the spark out, for example, the rotation angle
A position sensor 36 for height adjustment corresponding to the position of 270 ° is fixed, and corresponds to a dog 37 attached to a lower portion of the revolution shaft 8.

A fixed motor 42 for revolution and a motor 43 for rotation are incorporated in the grinding device 1. The fixed motor 42 is a motor mounting plate integrated with the fixed guide 2.
Installed together with speed reducer 45 for 44
A gear 46 on the output side of 45 meshes with the gear 16. Also,
The motor 43 for rotation is attached to the motor support 47 so as to face down, and a large pulley 4 on the motor shaft side is provided.
8, a small pulley 49 fixed to the lower end portion of the rotation shaft 10 and a belt 50 wound around these pulleys 49,
Is transmitted to The motor support 47 is mounted on the revolving shaft 8.
A lower end portion of the support frame 6 is connected to the lower end portion of the support frame 6 with a bearing 51 interposed therebetween. The lower end portion of the support frame 6 is fixed to the lower end of the support frame 6 by an elongated hole 52 of the intermediate portion. It is in a detent state around the revolution shaft 8.

First, the height of the rotary grinding body 23 is adjusted at a position where the position sensor 36 for height adjustment and the dog 37 correspond to each other. For this adjustment, loosen the detent screw 34, rotate the fixed shaft 31,
This is performed by moving the revolution shaft 8 in the vertical direction by a screw pair. At the height adjustment position, the intermediate shaft 28 is set at a constant height, so that when the fixed shaft 31 moves relatively up and down with respect to the revolving shaft 8, the revolving shaft 8 resists the urging spring 41. Then, it rises or is pulled by it and displaces downward. As a result, the rotation shaft 10 integral with the revolving shaft 8 and, consequently, the upper surface of the upper rotating grinding body 23 are set at an appropriate height. Of course, the upper surface, that is, the grinding surface, of the rotary grinding body 23 is relatively related to the height of a work 54 such as an optical fiber connector having a certain height in advance. Thereafter, the revolving shaft 8 is set in a state where it can be started from the original position, that is, the position with the rotation angle of 0 °, based on the correspondence between the original position sensor 35 and the dog 37.

In this state, the workpiece 54 to be processed is held in a vertical state by a chuck or the like, faces the upper surface of the rotary grinding body 23 at a predetermined distance, and rotates the chuck itself more than one rotation, for example, about 400 °. Reciprocating rotation within the rotation angle range.

When the fixed motor 42 and the motor 43 rotate for processing, first, the rotation of the rotation motor 43 is given to the rotation shaft 10 as high-speed rotation via the pulleys 48, 49 and the belt 50, and finally the rotation grinding is performed. It is transmitted to the body 23. Further, the rotation of the fixed motor 42 is reduced by the speed reducer 45 as the revolving motion of the rotary grinding body 23, and is rotated once per processing on the revolving shaft 8 via the gear 46 and the gear 16, for example, 1 [rpm]. Is transmitted as rotation. For this reason, the rotation shaft 10 revolves around the eccentric amount with respect to the revolution shaft 8 as a radius. As a result,
The ground surface of the work 54 is uniformly displaced by the amount of eccentricity in the width direction of the processing surface of the rotary grinding body 23 and without local wear over the entire processing surface. On the other hand, in the process of rotating the revolving shaft 8 from the rotation angle of 0 ° to 360 °, the cam roller 29 is displaced upward in the order of rapid feed, machining, finishing, and spark-out, thereby displacing the revolving shaft 8 and the rotating shaft 10 upward. Therefore, after the rapid traverse, the rotating grinding body 23
It comes into contact with the lower surface of 54, undergoes finishing, and is in a spark-out state. After the completion of the spark-out, the cam roller 29 comes into contact with the fast-return position and descends.
23 is separated from the lower surface of the work 54 having a certain height, and finishes the grinding down of the work 54.

In this way, when the revolution shaft 8 makes one rotation, the dog 37 again faces the original position sensor 35, and the control device (not shown) receives the signal from the original position sensor 35, and To stop automatically.

In such a series of grinding processes, the work 54 is held in a vertical state, and the upper surface of the rotary grinding body 23 is inclined at a predetermined angle with respect to the horizontal plane by the ring seat 4, and the work is
Since the reciprocating rotation is repeated within a range of 400 °, the ground surface of the work 54 after processing is formed as a conical surface as shown in FIG. Of course, the apex angle can be adjusted by setting the inclination angle of the rotary grinding body 23. Since such an inclined state is relative,
The conical surface can also be formed on the processing surface by rotating the rotary grinding body 23 horizontally and tilting the work 54 at a predetermined angle with respect to the vertical line.

Even if the revolution shaft 8 rotates, the motor support 47 is prevented from rotating by the rotation stopper shaft 53,
, But the lower portion of the revolving shaft 8 is aligned with the axis of the rotating shaft 10,
Since the motor support 47 is displaced on the plane along the revolution trajectory of the rotation shaft 10 at the portion of the revolving shaft 8, it is possible to repeat the swinging motion while displacing in the long hole direction at the portion of the long hole 52. Become.

The work 54 is not limited to an optical fiber connector. Further, in the case of planar grinding, the fixed guide 2 is mounted horizontally on the frame 3 and
Will face the work 54 in a vertical state. Further, the rotary grinding body 23 is not limited to a grindstone, but may be a grinding film or other grinding material.

Effect of the Invention In the present invention, a revolving motion is given to a rotating grinding body at the same time as a high-speed rotation movement, and the work comes into contact with the entire width of the rotating grinding body. It becomes possible. In addition, since the revolving shaft, the rotating shaft, and the like are housed inside the fixed guide and the support frame, high rigidity can be obtained even at the rotating support portion, and mechanical processing performance is stabilized.
In addition, the rotating parts are housed inside the fixed guide, and the fixed motor and the motor for rotation are arranged outside the fixed guide. It can be easily incorporated into not only grinding machines but also rotary index type processing equipment.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a grinding device, FIG. 2 is a sectional view taken along a vertical plane perpendicular to the machine from different directions, FIG. 3 is a bottom view of a motor support, and FIG. FIG. 5 is a plan view of the positional relationship with the sensor, FIG. 5 is a developed view of the cam, and FIG. 6 is an enlarged sectional view of the rotary grinding body and the work in a processing state. 1 ... grinding device, 2 ... fixed guide, 6 ... support frame, 8
... revolving shaft, 9 ... eccentric hole, 10 ... rotating shaft, 23 ... rotating grinding body, 27 ... fixed cam, 41 ... urging spring, 42 ...
... fixed motor, 43 ... motor, 47 ... motor support.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadao Saito 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Kazuo Matsunaga 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation (56) References JP-A-56-126359 (JP, A)

Claims (1)

(57) [Claims] A supporting frame rotatably supported by a fixed guide, a revolving shaft rotatably supported by the supporting frame and having an eccentric hole in an axial direction, and rotatably supported by the eccentric hole of the revolving shaft. The rotating shaft, a rotary grinding body fixed to the upper end of the rotating shaft, a downward biasing means for biasing the support frame in a downward direction, and a lower side of the revolving shaft to move the revolving shaft up and down. A grinding machine, comprising: an annular fixed cam, a fixed motor that drives the revolving shaft to rotate, and a motor supporter rotatably supported by the revolving shaft and mounted with a motor that rotates the revolving shaft. .