JPS5934502A - End face polishing machine for optical fiber connector - Google Patents

Abstract

PURPOSE:To obtain an easy-to-carry polishing machine which polishes an end face with a depression easily and precisely by utilizing a cylindrical elastic wheel which utilizes the cylindrical surface of a wheel. CONSTITUTION:A pressure adjusting screw 14 is adjusted to decide on a working method by a pressure scale 15. Then, a material 16 to be polished is set in a holder 9 for the material to be polished and positioned by a positioning screw 17. The pressure screw 14 is hooked so that it does not return, a rotation switch is turned on, and the screw is unhooked to apply the material gently to the cylindrical wheel 5 rotated by a driving motor M-1 through gears 7 and 6, thereby polishing the material. Further, when a rocking switch is turned on, a driving motor M-2 moves a disk 11 and then an eccentric shaft 12 fitted to the disk 11 rotates to rocks a rocking shaft 8 upward and downward; and pressure adjusting hardware 10 fixed atop of the rocking shaft 8 rocks upward and downward to polish the objective material 16 into a concave shape until a timer stops.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device that makes the end face of an optical fiber connector uniform and recesses only a portion of the central fiber into a concave spherical shape from the end face of the connector, and more specifically, it is portable and can be carried anywhere. The present invention relates to a polishing machine that can be used and easily and precisely polishes an end face including a recess.

As is well known, optical fibers are used as optical communication transmission media, and in order to reduce connection loss at the joints, the tolerance for misalignment between the optical fibers must be kept to an accuracy of several microns. Furthermore, it is better to polish a part of the fiber into a concave spherical shape in order to make the transmission efficiency stable and uniform even if there is a slight deviation under the tolerance or a gap due to dust, etc. With this in mind, there is a need to perform polishing accurately and quickly in all places, and in view of this, we have developed a portable polishing device. In other words, in all of these end face polishers, the wheel axis on which the grindstone is installed, the workpiece axis, or a fixed axis (oscillating axis) are installed parallel to each other, and the workpiece axis on which the material to be polished is placed is rotated relative to the eccentric wheel axis. and by making it swingable, or by rotating the swinging shaft to make the material to be polished installed between it and the fixed shaft swingable, depending on the weight of the work shaft or fixed shaft containing the material to be polished. The basic idea is that the grinding wheel is brought into contact with the grindstone.

However, this polishing machine had the following drawbacks.

In other words, the structure is complicated due to the rotation and eccentric movement, and the relationship between the upper wheel axis and the material holder means that the finished material has a flat end surface, so it is difficult to use optical fiber joints. It is possible to keep the connection loss to only a few degrees β, and since the material to be polished is polished flat, it is possible to polish while measuring the length (fitting length) and replacing the whetstone and abrasive grains. There was also a problem with the workability of performing rough polishing and finishing polishing from time to time.The present invention was developed with the intention of solving the above drawbacks, and the present invention will be described in detail based on the drawings below. explain.

Figure 1 is a plan view of the machine of the present invention, Figure 2 is a sectional view thereof, and Figure 3 is a plan view of the machine of the present invention.
The figures show their side cross-sectional views 0 In these figures 1
indicates a casing, and this casing 1 is equipped with a lid 2. Housing 1
There is an upper support 1a on the top surface, and a drive motor M-1 on one side.
A polishing mechanism including a drive motor M-2 is provided on the opposite side, and a swinging mechanism including a drive motor M-2 is provided on the opposite side. 3
indicates a wheel shaft 7 provided on one side of the housing, and is rotatably installed in a sleeve 4a fixed to the earth side of the upper support 1a of the six wheel shaft housing 1, and the upper end of the wheel shaft 3 is A cylindrical wheel is attached to a cylindrical wheel extending upwardly from the sleeve 4a.A gear 6 is fixed to the lower end of the wheel shaft 3, and this gear 6 is connected to a drive motor M.
- the drive motor M via the gear 7 fixed on the
-1, and its drive motor M-1 is fixed to the housing upper receiver 1a with screws. This swing shaft 8 is pivotally attached to a sleeve 4b fixed to the lower side of the upper support 1a so as to be able to swing up and down, and its upper end is exposed above the upper support 1a and is covered. Abrasive material holder 9
The bent lower end to which the machining adjustment fitting 10 including the It is designed to oscillate. The pressure adjustment fitting 10, which is fixed to the upper end of the swing shaft 8, consists of a pressure adjustment tool 10A and a positioning base 10B. A force loe rod 16 with a tool 9 attached thereto can be freely slid into it, and the processing pressure can be adjusted on the opposite side, making it possible to control the processing pressure in conjunction with the pressure scale 15 attached to the top surface. There is. On the other hand, the positioning table 10B is
A positioning screw 17 is attached that holds the 0A and determines the reference position of the material to be polished 16. That is, the 16 materials to be polished are screwed to the material holder 9 with fixing screws 18, and the material to be polished 16 is attached to the pressure adjustment fitting 10 at a position such that the end surface of the material 16 is perpendicular and horizontal to the side surface of the cylindrical wheel 5. Fixed.

In the above configuration, the material to be polished 16 in contact with the rotating cylindrical wheel 5 is controlled by the swing shaft 8 in the thickness direction (preferably within the thickness range) of the cylindrical wheel 5 and swings up and down. In addition, the machining pressure is adjusted by the Calo pressure adjustment screw 14, allowing polishing from rough polishing to finish polishing without changing the wheel.
6 generally has a fiber wire in the center and a ceramic capillary on the outside and a metal ferrule on the outside, so a cylindrical wheel using the cylindrical surface on the outer periphery as the polishing surface polishes only the fiber wire. In order not to abrade the gear pillar or ferrule, we use abrasive grains that are softer than the material of the capillary, such as cerium oxide, iron tetroxide, magnesium oxide, manganese oxide, etc. mixed with an elastic binder, and are made of metal. Not only the ferrule, but also the capillary and the end face of the fiber in the vicinity of the capillary are not polished, but the central part of the fiber is polished more, so that the fiber is formed into a concave spherical shape and at the same time has a predetermined size.

Next, to explain the operation of the il+f grinding mechanism according to the present invention, first, the pressure adjusting screw 14 is adjusted and the Caloe pressure is determined by the pressure scale 6-15. and tighten it with the fixing screw 15.Then, transfer the pressure adjustment Ji!-1OA at the point where the material to be polished 16 touches the cylindrical wheel 5, and then tighten the positioning base 1.
Position it using the positioning screw 17 attached to 0BF. Pull the polishing screw 14 as shown in the figure, until the tension returns, turn on the rotation switch, remove the screw, and remove the gear 7 from the drive motor M-1. Through teeth *6 2
This is done by gently applying it to the cylindrical wheel 5 that is rotated [-].

Furthermore, when the swing switch is turned on, the drive motor M-2 moves the disk 11, and the eccentric shaft 12 added to the disk 11 rotates, causing the swing shaft 8 to swing downward by 1". A pressure adjustment fitting 10 fixed to the upper end swings up and down to adjust the material 1 to be polished.
6 is polished into a concave spherical shape at the point where the timer stops.Also, it is of course possible to stop the drive motor if necessary.Q Similarly, the relative speed between the wheel and the workpiece at that time is 20 to 200.
m/min, and the processing load is 1l-1-2 to 40kg/cm2.O From rough polishing to finish polishing, you can polish to a high degree of KN without changing the polishing wheel or abrasive grains.You can also polish the length of the twisted ferrule without changing its dimensions, so you can measure the mating length of the ferrule. This eliminates the need for sharpness, improves work efficiency, and allows the central part of the tip of the material to be polished to have a concave spherical shape, reducing connection loss by one order of magnitude (two degrees).
d~4αβ can be decreased by 02~0.4#β),
In addition, the transmission efficiency is uniform [L], and it is also effective in providing a polishing machine that is smaller, simpler, and more portable than the one previously proposed by the present inventor.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the polishing apparatus according to the present invention, second gear 1 is a sectional view, and FIG. 3 is a side sectional view. ... Material to be polished holder 10 ... Processing adjustment fitting 10A ... Machining EE adjustment tool 10B ... Positioning table 12 ... Eccentric shaft 14 ... Force [1 pressure adjustment screw 16 ... Abrasive material 17...Positioning screws M-1, M-2...Representative block above the drive motor 9-7 No. 11 Fig. 3 8-

Claims (1)

[Claims] A wheel shaft with a polishing wheel installed at one end and driven by a motor, and a material to be polished held on one side of the wheel shaft, facing the circumferential side of the polishing wheel, with one end of the optical fiber held by a spring or the like. An end face polisher for optical fiber connectors, which comprises a swing shaft connected to another motor drive source via an eccentric shaft for swinging in the plane direction of the optical fiber connector.