JPS63278758A - Rotary type polishing device - Google Patents

Abstract

PURPOSE:To unify approximately an abrasive sheet wear throughout by interlocking rotating and revolving mechanisms for connection to a common driving motor thereby causing the rotation and revolution of an abrasive sheet, and providing a brake device for adjusting the speed of the rotating mechanism. CONSTITUTION:A single motor is used to drive a rotating mechanism comprising a V-pulley 21, a V-belt 20, a V-pulley 19, a cylindrical shaft 4 and gears 17, 18 and 16, and a revolving mechanism comprising a gear 23, a large-bore gear 14 and projected cylindrical parts 14c and 12c. And a rotary frame 8 and an abrasive sheet 7 are made to revolve about an axial center (a), while rotating about another axial center (b), and a polishing feed device 25 is operated to press a workpiece 26 to the abrasive sheet 7, thereby polishing the workpiece 26 at a constant position. In this case, a brake device 31 is operated to set and change optionally the turning speed or rotating velocity of the cylindrical shaft 4, thereby changing the rotating speed at a constant revolving velocity. A ration of the rotating speed to the revolving velocity is changed to vary the polishing locus of the abrasive sheet 7 for the workpiece 26, thereby causing a uniform wear on the whole area of the abrasive sheet 7.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to, for example, forming the end face of an optical fiber connector into a convex spherical surface so that losses due to axis misalignment or poor contact during connection are extremely reduced. It is a rotary polishing device that is used for polishing, etc., and is also used for polishing the end surfaces of various parts to curved or flat surfaces. an autorotation mechanism that drives and rotates a cylindrical frame to be supported around its axis, and a revolution mechanism that rotates the cylindrical rotating frame and the polishing sheet about an axis offset from the above-mentioned axis for autorotation. The present invention relates to a rotary polishing device that includes a mechanism and a polishing feed device that fixes and holds a material to be polished and presses the part to be polished against a polishing sheet in a fixed position.

(Prior Art) According to the rotation and revolution type polishing device as described above, compared to a simple rotation type polishing device, the effective polishing area of one polishing sheet can be increased (larger than that of a simple rotation type). Economical and processing accuracy benefits can be obtained, such as extending the polishing sheet replacement cycle and making the polished surface more uniform.

In conventional rotation and revolution type polishing machines that have such effects, a drive motor for the side of the rotation machine and a drive motor for the revolution mechanism are separately provided, and the ratio of the rotation speed to the revolution speed is also constant. Met.

(Problems to be Solved by the Invention) When using the above-mentioned conventional device, the entire device is expensive and easy to increase in size because it requires two drive motors. The locus of polishing action on the material to be polished by the combined motion) The reduction component wears out early, and the effect obtained by the combination motion of rotation and revolution as described above was also a net component.

This invention has been made in view of the above-mentioned circumstances, and uses one motor to construct the entire structure at low cost and small size.
It is an object of the present invention to provide a rotary polishing device that can promote the effect of expanding the effective polishing area of a polishing sheet through a combination of rotation and revolution.

(Means for Solving the Problems) In order to achieve the objective 1 described in -, the rotary polishing apparatus according to the present invention has the configuration described in detail at the beginning, and has the above-mentioned rotation mechanism 11f and revolution mechanism. It is characterized in that it is connected to one drive motor in conjunction with the other, and is also provided with a brake device that adjusts the rotational speed of the rotation mechanism.

(Function) According to the present invention, when the one drive motor is operated, the rotating frame and the polishing sheet revolve while rotating due to the functions of the rotation mechanism and the revolution mechanism.

In this state, a predetermined polishing process is performed by pressing the end surface of the material to be polished, which is fixedly held in the polishing feeder, against the recording sheet. By adjusting the rotation speed of the mechanism, it is possible to arbitrarily change the ratio between the rotation speed and the revolution speed, and when pressing the material to be polished, the polishing action locus of the polishing sheet against the location is changed, and this polishing sheet A sheet can be used for as long as possible with the wear being approximately evened out over its entire area.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a vertical cross-sectional view of the main parts of a rotary polishing apparatus according to an embodiment of the present invention, and FIG. 2 is a partially cutaway plan view of FIG. , (2) is a fixed support shaft that is fixedly installed in an upward and downward vertical position at approximately the center of the grounding frame (1), and a tube sleeve ( 4) are fitted and supported in a concentric manner so that they can only rotate freely, and a connector chuck (5) is attached to the upper end of the foot fixed support shaft (2).
) A fixing member (6) for limiting polishing of the disc cane in plan view is detachably attached. (7) is a circular abrasive sheet, which is made by adhering diamond abrasive grains etc. to the surface of a thin sheet having flexibility and elastic restoring force, and a cylindrical rotating frame (8); A cylindrical presser frame (11) is connected to the upper end of the rotary frame (8) so as to be able to swing up and down around the horizontal horizontal axis (9), and to be able to be tightened and fixed at will via a metal fitting (lO). The outer periphery of the insulator is clamped and fixed between the upper and lower opposing surfaces of the insulator, and the insulator is installed in a replaceable manner. (Otori 2) is a knock pin (I) attached to the lower part of the cylindrical rotating frame (8).
3) is a cylindrical rotary passive member that is concentrically connected through the shaft, and its rotational axis (a) is at an angle of Δ! with respect to the axis (b) of the fixed support shaft (2). It is rotatably supported via a thrust bearing (15) by a large-diameter gear 04), which will be described later, in a state where the gear is deviated by a certain amount, and an internal gear (lB) is concentrically fixed to the inner step of the gear. There is. (
! 7) is a gear fixed to the top of the cylinder shaft (4),
Both inner gears 1B) are connected via the idle gear (18).
It is interlocked with the (19) is a V pulley fixed to the lower part of the sleeve sleeve (4), and a V bell) (2G
) is fixed to the rotating shaft (24A) of the motor (24) fixedly supported on the frame 0), and thereby the motor (24), the v-pulley (21),
■ Heald (20), V-pulley (19), Tsutsusode (4),
The rotating frame (8) is rotated by gears (17), (18), and (1B).
and constitutes an autorotation mechanism that drives and rotates the polishing sheet (7) around the axis (b).

(14) is the large diameter gear mentioned above, and the thrust bearing (2
2) is rotatably supported on the ground frame (1) around the axis (a), and a vertical penetration part (14A) is formed in the center of the ground frame (1). 14A
) - The idle gear (18) is fixed to the vertical shaft (18A) which is rotatably supported by the free end of the arm (14B) that protrudes inward, through which the cylindrical shaft (4) is inserted. has been done. On the −H surface of this large diameter gear (14),
” - The cylindrical part (14G) that is concentric with the rotating frame (8)?
- A cylindrical part (12C) that protrudes from the body and fits concentrically into the protruding cylindrical part (14G) is integrally formed with the rotation passive member (12). (23) is the large diameter gear (14) above.
A gear meshing with the rotating shaft (24A) of the motor (24)
The motor (24), the gear (23),
The large-diameter gear (14) and the protruding cylindrical portions (14C) (12G) constitute a revolution mechanism that drives and rotates the bipedal rotating frame (8) and the polishing sheet (7) around the axis (a), This revolving mechanism and the above-mentioned rotation mechanism rotate the polishing sheet (7) into 4
The two-leg polishing limiting fixing member (6) is configured to be continuously driven and moved in close contact with the surface of the fixing member (6).

A plurality of holes (GA) are formed through the polishing limiting fixing member (6) at appropriate intervals in the circumferential direction thereof. These holes (6A) are an example of a material to be polished. When the end face of an optical fiber connector (2B) to be polished, which will be described later, is pressed against the polishing sheet (7), the pressing is performed on the sheet portion (7a) on which the force acts. The optical fiber connector (2B) is polished by changing the maximum amount of deformation of the sheet portion (7a) depending on the diameter of the hole (6A). The curvature of the end face to be polished can be changed, and for this purpose, a plurality of fixing members (6) with different hole (6A) diameters are prepared and configured to be detachable so that they can be selectively used.

(25) is a polishing feeding device that fixes and holds a plurality of the optical fiber connectors (26) described in 1 above and presses their end surfaces to be polished in a concentric state toward each hole (8A) in the fixing member (6). This consists of a pair of upper and lower disc-shaped clamping members (27) and (28) that clamp the flange (26A) provided at the middle part of the 1-2 optical fiber connector (2B), and a feed shaft (29). The lower holding member (28) is fixedly connected to the lower end of the feed shaft (29), and has a through hole (28a) through which a portion lower than the flange (2fiA) is inserted, Some of the clamping members (27) are fitted onto the feed shaft (29) so as to be slidable in the axial direction thereof, and are attached to the lower clamping body (28) via springs and rings (30). It is biased to slide on the side.

(3) is a brake device that adjusts the rotational speed of the above-mentioned rotation mechanism, and this is a rotary brake fixed to the outer periphery of the cylinder shaft (4) or, although not shown, to the cylinder sleeve (4). The brake shoe (33) is provided around the outer circumference of the drum via a hydraulic cylinder (32) or the like so that the pressure can be adjusted and the brake shoe (33) can be freely separated.
By changing the setting of the pressing force, the rotational speed of the sleeve (4), that is, the rotational speed of the rotating frame (8) and the polishing sheet (7) are made variable.

Next, the operation of the structure shown in FIG.

Figure 4(a) shows the optical fiber connector (2) before spherical polishing.
B) is a sectional view showing an optical fiber (26a) consisting of a core and a cladding connected to a stainless steel connector body (2[
Insert the fiber into the center of the connector body (21Eb), and connect a portion of the fiber of an appropriate length on the connection end side to the
) is fixed and held at the center by alumina ceramics (28c) filled with alumina ceramics (28c), and before polishing, the end face (2Gd) is a flat surface perpendicular to the axis.

While a plurality of optical fiber connectors (26) having the above-mentioned structure are fixedly held in the polishing feeder (25) as specified, both motors (21) and (24) are operated to rotate the rotating frame (
8) and the abrasive sheet (7), as schematically shown in FIG. 3, while rotating around the axis (a).
rotate around.

In this state, the feed shaft (29) of the feed device (25) is moved in the opposite direction (in the direction of the arrow X in Figure 1), and each end face of the optical fiber connector (2B) that is fixedly held is moved to the polishing sheet (2). 7), the abrasive sheet portion (7a) on which the force acts is locally indented and deformed inward of the hole (6A) of the fixing member ([f). As a result of this concave deformation, as shown in FIG.
The area comes into contact with the area and is polished. As the feed shaft (29) is sequentially moved in the opposite direction during such polishing, the amount of deformation of the polishing sheet (7) into the hole (6A) increases, and the optical fiber connector (2B) is When the polishing of the end face progresses in the direction of the arrow in FIG. 5(a) and the amount of concave deformation of the polishing sheet (7) reaches the maximum as shown in FIG. 5(b), as shown in FIG. 4(b). The end surface of the optical fiber connector (2B) is polished into a convex spherical surface (28e) as shown in FIG.

In the rotary polishing work as described above, the pressing force of the brake shoe (33) of the brake device & (31) is increased or decreased through the hydraulic cylinder (32), and the rotational speed of the sleeve (4), that is, By arbitrarily changing the rotation speed, the original rotation speed of the constant revolution speed is changed, and the locus of the polishing action of the sheet (7) on the end face of the optical fiber connector (26) is changed depending on the ratio of both speeds. Therefore, the effective polishing area of the polishing sheet (7) of a certain area can be reduced to 1 minute, and its life can be extended.

Note that when the optical fiber connector (26) is unprocessed, the optical fiber (2 [ia)] slightly protrudes from the end surface, and a part of the adhesive present at the adhesive part with the connector body (211ib) is attached to the end surface. In some cases, the protruding portion from the end face is polished together with the other portions, and finally becomes a convex spherical surface ([-1-).

In addition to optical fiber connectors, the apparatus of the present invention can also be applied to, for example, lens surface polishing that requires precision polishing, and it goes without saying that it can also be applied to even more pure surface polishing.

(Effects of the Invention) As is already clear from the detailed description above, when the present invention is used, the polishing sheet is continuously rotated, and the workpiece only needs to be fed, so it is movable. The structure of the parts is simple and simple, which not only simplifies the structure of the entire device (but also greatly reduces the influence on polishing accuracy due to the accumulation of production errors, backlash, and degree of wear in the moving parts.1. The rotational movement of the abrasive sheet described in L is a combination of rotation and revolution, and as a result, the effective polishing area of the sheet for the material to be polished can be increased compared to when the sheet rotates only on its axis. By making the speed variable, it is possible to arbitrarily change the locus of polishing action due to the combination of rotation and revolution, and by utilizing almost the entire surface of one polishing sheet as the polishing surface, the sheet replacement cycle due to wear can be reduced. It is possible to achieve economic effects such as being able to significantly extend the period of time.

Moreover, it is sufficient to use one motor as both the rotation-like lateral drive motor and the revolution mechanism drive motor, and to add a brake device to this motor, making it easy to construct the entire device at low cost and in a small size. , the above effects can be achieved.

[Brief explanation of drawings]

FIG. 1 shows a rotary polishing apparatus according to an embodiment of the present invention2! ! FIG. 2 is a cutaway plan view of the part shown in FIG. A cross-sectional view of the target example optical fiber connector before polishing and a cross-sectional view after polishing,
FIGS. 5(a) and 5(b) are explanatory diagrams of the polishing action. (7)...Abrasive sheet, (24)...Drive motor,
(25)...polishing feed device, (2G)...optical fiber connector (material to be polished), (31)...brake device, (33)...brake shoe. Patent Applicant 2.-1 Agent/Patent Attorney Takashi Yamamoto',-゛:'
・;“−～, / 1;4-I Figure 3 Figure 5 (b) 64 (Q

Claims (2)

[Claims] (1) A rotation mechanism that drives and rotates a cylindrical frame (8) that supports a circular polishing sheet (7) around its axis (b), and the cylindrical rotating frame (8) and the polishing sheet ( 7) a revolution mechanism that rotates the material around an axis (a) that is offset from the above-mentioned rotation axis (b), and a material to be polished that is fixedly held;
A rotary polishing device equipped with a polishing feed device (25) that presses the polishing area against the polishing sheet (7) at a fixed position, the rotation mechanism and the revolution mechanism being driven by one drive motor (24). A rotary polishing device characterized in that it is provided with a brake device (31) that is interlocked with each other and adjusts the rotational speed of the rotation mechanism. (2) The above-mentioned brake device (31) is connected to the above-mentioned revolution axis (a
2. The rotary polishing device according to claim 1, wherein the rotary polishing device is of a friction type in which a brake shoe (33) is brought into sliding contact with the outer peripheral surface of an intermediate transmission shaft (4) for an autorotation mechanism located concentrically with the rotating mechanism.