JPH0440151B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a barrel polishing apparatus that can be used in either a high speed planetary rotating barrel polisher or a rotary barrel polisher, and in either case acts as a three stage acting barrel.

Conventional high-speed planetary rotating barrel polishing has been widely used due to its high processing efficiency, but there is a limit to the surface roughness of the processed workpiece due to the abrasive material charged into the barrel tank, and once a certain roughness is reached. , no further improvement in surface precision can be expected. On the other hand, rotating barrel polishing has a low processing efficiency, but is characterized by greatly improving the surface roughness of the processed workpiece.

Therefore, when two processes of rough finishing and gloss finishing are required, the rough finishing is performed by high-speed planetary rotating barrel polishing.
Next, after replacing the abrasive with a glossy one to achieve a glossy finish, or performing a rough finish with high-speed planetary rotating barrel polishing, the contents are transferred to a rotating barrel tank.
Since polishing is performed using a separate rotary barrel, it takes time and a lot of effort to replace the contents. Furthermore, the use of a high-speed planetary rotating barrel polishing machine and a rotating barrel polishing machine improves the surface roughness, but has the drawbacks of requiring a large installation area and being expensive.

However, according to this invention, the barrel tank is attached to the turret so that it can rotate and revolve (that is, perform planetary rotation motion), and the barrel tank can be rotated about its axis while being fixed to the turret. As a result, not only can a single device be used to selectively use the high-speed planetary rotating barrel polishing method and the rotating barrel polishing method, but also a three-stage operation can be performed in either case, if necessary. You can choose the shape of the barrel.

In addition, the turret is rotated and revolved in a high-speed planetary manner to roughly finish the workpiece, and the barrel tank containing the workpiece, abrasive material, and if necessary, water and compound is then rotated and revolved. By rotating the machine, the workpiece can be finished with a glossy finish using the same abrasive material. In addition, in contrast to this method, after polishing by a rotating barrel polishing method, it is also possible to perform polishing by a high-speed planetary rotating barrel polishing method using the same abrasive material. In this way, two polishing steps with different properties can be performed successively without replacing the contents (hereinafter referred to as mass). Furthermore, the present invention provides a tapered notch at the tip of the barrel shaft, a gear housing having a drive device is installed to be able to move up and down, and a rotating shaft is provided in the gear housing to transmit driving force through large and small bevel gears. , protrudes from the gear housing, and engages the tapered end of the rotating shaft with the notch of the barrel shaft, so that even if there is a slight deviation between the normal position and the stopped position of the barrel tank, it can be reliably rotated. The present invention has succeeded in solving all of the above-mentioned drawbacks of the conventional barrel polishing device, such as being able to engage easily, being extremely robust and highly safe without the risk of damaging the drive device, and creating an ideal barrel polishing device.

Next, details of the present invention will be explained with reference to the accompanying drawings. FIG. 1 is a partially cutaway front view of the apparatus for implementing the present invention, FIG. 2 is a cross-sectional view taken along the line B-B in FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along line A-A in FIG. FIG. 4 is a front view when the barrel shaft and the rotating shaft of the gear case are disengaged, FIG. 5 is a front view of the barrel tank, and FIG. 6 is a side view of the barrel tank. That is, the casing 1 is a hollow box made of an iron plate, and a boss 3 to which a plurality of timing pulleys or sprockets 4 are fixed is vertically and rotatably installed in the center of the ceiling 1a. A shaft 2 of the turret is rotatably inserted, and a disc-shaped turret 5 is fixed to the lower end of the turret shaft 2. A plurality of bearings 6, 6a are mounted on the periphery of the upper surface of the turret 5 on the same circumference centered on the turret axis 2 at equal intervals and parallel to the turret axis 2 (in this embodiment, two bearings are installed). (Although four is usually optimal.), the support shaft 7 is rotatably inserted into the bearings 6, 6a. A support frame 8 is attached to the lower end of the support shaft 7, and a shaft 10 of the barrel tank 9 is attached to the support frame 8.
is rotatably supported in parallel with the turret 5, and a tapered notch 21 is provided on the center side of the turret 5 at the tip of the barrel shaft 10 of the barrel tank 9. The barrel tank 9 has a first shape.
As shown in Figures 2, 5 and 6,
Surfaces 38a, 38b fixed to the barrel axis 10 are squares perpendicular to the barrel axis 10, and square surfaces 39a, 39b, 39c, 39d, parallel to this axis and perpendicular to each other and of the same size as 38a, 38b,
It is desirable to have 39e, 39f, 39g, and 39h. In this way, as shown in the figure, the top view, elevation view, and side view of the barrel tank will all have the same shape, and even in the case of a rotating barrel (rotation around the barrel shaft 10), a high-speed planetary rotating barrel will be possible. Even in the case of (planetary rotation with the revolution axis as the turret axis 2 and the rotation axis as the support axis 7), the slope shown in the figure performs an appropriate stirring action, resulting in a so-called three-stage action barrel, which further improves polishing efficiency. There is.
In the figure, 12 is a lid of the barrel tank 9. The support shaft 7
A timing pulley or sprocket 13 is fixed to the upper end, and the timing pulley or sprocket 13 is connected to the timing belt or chain 2.
7, the timing pulley or sprocket 4 is interlocked with the timing pulley or sprocket 4. Also, a timing pulley or sprocket 4 fixed to the top of the boss 3
is timing belt or chain 28, reducer 2
9 by the motor 30 (the first
figure). The turret 5 is rotated via a pulley 15 of a variable speed motor 14 with a brake installed on one side of the casing 1 and a belt 16 attached to a groove in the circumferential wall of the turret 5. On the other hand, the small bevel gear 1 is inserted into the housing 18 erected at the bottom of the casing 1.
1. A T-shaped gear housing 17 that accommodates the large bevel gear 25 and the variable speed motor 23 is fitted so as to be movable up and down. A hydraulic cylinder 26 is fixed vertically inside the lower part of the housing 18, and the tip of a piston rod 24 protruding from the hydraulic cylinder 26 is fixed to the bottom of the gear housing 17. A variable speed motor 23 is installed vertically in the lower part of the gear housing 17, and a large bevel gear 25 is attached to the upper end of a rotating shaft 20 connected to the shaft of the variable speed motor 23.
is fixed, and the large bevel gear 25 meshes with the small bevel gear 11 facing from a direction perpendicular to the large bevel gear 25. One end of a rotating shaft 19 is horizontally fixed to the small bevel gear 11 and protrudes from the gear housing 17 to the outside. A tapered portion 22 is connected to the other end of the rotating shaft 19 via a flexible joint 37. The tapered portion 22 can be engaged with the notch 21 of the barrel shaft 10 as shown in FIG. 1st
In the figure, numeral 31 is a notch that is engaged with a hole in the barrel shaft 10 by a solenoid 36, numerals 32 and 33 are proximity switches, and numerals 34 and 35 are dogs.

In addition, the timing pulley or sprocket 4, 13 and the timing belt or chain 27
Instead of being driven by a gear, it can also be driven by a gear without slipping or slack. Further, in the embodiment described above, the body is constituted by the casing 1, but it is also possible to provide a casing as a cover around the outer periphery of a normal frame-shaped body.

The operation of the present invention will be explained below according to the above structure. The apparatus of this invention can perform only high-speed planetary rotating barrel polishing, rotating barrel polishing only, rotating barrel polishing that is continuous with high-speed rotating barrel polishing, or high-speed planetary rotating barrel polishing that is continuous with rotating barrel polishing, etc.
Although a number of different polishing methods can be used, the present invention will be described here with continuous rotating barrel polishing rather than with high speed rotating barrel polishing, which is easiest to understand.

A predetermined amount of the workpiece, abrasive material, water and compound if necessary are added into the barrel tank 9, and the lid 12 is attached and sealed. When all the barrel tanks 9 have been prepared, the variable speed motor 14 with brake is started.
At this time, it is assumed that the gear housing 17 has descended as shown in FIG. 4, and the engagement between the taper portion 22 and the notch 21 has been released. When the motor 14 is started, the turret 5 rotates in the direction of arrow a as shown in FIG. It is rotated in the direction of arrow b in the figure. The ratio n/N between the revolution number N and the rotation number n of this barrel tank 9 can be appropriately selected by adjusting the rotation speed of the motor 30, but by stopping the rotation of the motor 30, the ratio n/N can be set by -1 It is best to select In addition, the number of revolutions of the barrel tank 9 in this case is 60 to 200/√2 revolutions per minute, optimally 100 to 200 revolutions per minute, when the revolution radius of the barrel tank is R (m).
Selecting 160/√2 rotations gives good results. Since the barrel tank 9 revolves around the axis 2 of the turret and also rotates on its own axis on the support shaft 7, the mass in the barrel tank 9 flows centrifugally, and the workpiece is subjected to high-speed planetary rotation barrel polishing.

In the device of this invention, when the barrel tank is rotated horizontally as shown in Figs. 1 and 2, the mass gradually rises toward the outer circumference of the inner wall of the barrel tank at the same time as the start, compared to a device that rotates vertically. It is also possible to rotate the turret 5 vertically, i.e., the barrel tank 9 vertically, although this has the advantage of less shock during starting and stopping. When the first step is completed, the brake-equipped variable speed motor 14 is stopped. This stop occurs when the proximity switch 33 detects the dog 35 on the turret 5 and the taper portion 22 and notch 21
Stops at a position where it can be engaged. When the gear can be stopped at a fixed position, pressure fluid is introduced into the piston side of the fluid pressure cylinder 26 to push out the piston rod 24 and raise the gear housing 17.
and the tapered notch 21 of the barrel shaft 10 are engaged with each other. At this time, even if there is some misalignment, they are both tapered and the flexible joint 37
Since they are connected by , they can be engaged reliably.
Next, the solenoid 36 is actuated to release the notch 31 that fixed the barrel shaft 10. Next, the variable speed motor 23 is started, and the rotating shaft 20 and the large bevel gear 25 are rotated. As a result of this rotation, the small bevel gear 11 meshing with the large bevel gear 25 and the barrel shaft 10 rotate as shown by arrow c in FIG. 1, the barrel tub 9 rotates in the vertical direction, and the workpiece rotates normally. Barrel polishing is performed. The rotation speed of this barrel is 15 per minute when the radius of the inscribed circle of the barrel tank is r (m).
Good results are obtained by choosing ~30/√2 revolutions per minute, optimally 18-25/√2 revolutions per minute. When the second step is completed, stop the variable speed motor 23,
Remove the lid 12 of the barrel tank 9, rotate the barrel tank 9 to discharge the mass onto a vibration sorter (not shown) for sorting, and then move the barrel tank 9 to the proximity switch 32.
Then, it is stopped at a fixed position by the dog 34, and one cycle is completed.

In the above embodiment, the plurality of barrel tanks 9 are rotated by only one drive of the motor 23, but a motor corresponding to each of the plurality of barrel tanks may be installed in the gear case. . It is also obvious that an inverter-equipped motor may be used instead of the variable speed motor described above. Furthermore, in the above embodiment, the turret shaft is provided on the ceiling of the housing,
Although the barrel tank is suspended, the turret shaft may be installed at the bottom of the casing and the barrel tank may be mounted on a support frame, that is, the state shown in FIG. 1 may be turned upside down. In this way, the durability of the bearing into which the support shaft is inserted is improved.

Next, in the embodiment described above, the engagement/disengagement mechanism was configured by the notch in the barrel shaft 10 and the tapered portion 22 at the end of the rotating shaft 19, but the mechanism is not limited to this specific structure. For example, the notch and tapered portion can be reversed, or other known connection means can be used. The point is that it is sufficient to be able to transmit the rotational force through connection and to regulate the position. In addition to the shapes shown in FIGS. 5 and 6, a spherical shape or the like can be used as the shape of the barrel tank.

As described above, the present invention not only can be used for either a high-speed planetary rotating barrel polishing machine or a rotary barrel polishing machine, but can also be configured to have a three-stage action barrel in either case, and can be used in one machine. This machine can perform a wide variety of polishing tasks. In addition, when the turret is rotated horizontally, the barrel tank is rotated horizontally in high-speed planetary rotating barrel polishing, which has the advantage that there are no dents, chips, or cracks on the workpiece.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line B-B in FIG. 1, and FIG. Figure 4 is an enlarged cross-sectional view taken along line A-A in the figure, Figure 4 is a partially sectional front view when the barrel shaft and the rotating shaft of the gear case are disengaged, and Figure 5 is an enlarged front view of the barrel tank. , FIG. 6 is an enlarged side view. 1... Housing, 1a... Ceiling, 2... Turret axis,
3... Boss, 4... Timing pulley or sprocket, 5... Turret, 6, 6a... Bearing, 7... Support shaft, 8... Support frame, 9... Barrel tank, 10... Barrel shaft, 11... Small bevel gear, 12... Lid , 13... Timing pulley or sprocket, 14... Variable speed motor with brake, 15... Pulley, 16... Belt, 17... Gear case, 18... Housing, 19... Rotating shaft, 20... Rotating shaft, 21... Notch, 22... Taper, 23... Variable speed motor, 24... Piston rod, 25... Large bevel gear, 26... Fluid pressure cylinder, 27... Timing belt or chain, 28
...Timing belt or chain, 29...Reducer, 30...Motor, 31...Knock, 32, 33
...Proximity switch, 34, 35...Dog, 36...Solenoid, 37...Flexible joint.

Claims (1)

[Claims] 1. A shaft of a turret is rotatably installed on the fuselage,
A support shaft is rotatably mounted parallel to the turret axis on the same circumference of the periphery of the turret, a support frame is fixed to the support shaft, and the barrel shaft is attached to the support frame parallel to the turret surface and rotatable. a barrel tank is attached to the barrel shaft, the inner end of the barrel shaft and the tip of a rotating shaft protruding from the inside of a gear housing which is attached to the fuselage so as to be able to move up and down are configured as a detachable mechanism, and the turret Barrel polishing device 2 characterized in that the shaft of the gear is connected to a drive device. Barrel polishing device 3 according to claim 1, characterized in that the device comprises a protruding rotating shaft. Barrel polishing device 3 according to claim 1, characterized in that the turret is installed horizontally. Device 4 The shape of the barrel tank is characterized in that the surface fixed to the barrel axis is a square that is perpendicular to the barrel axis, and a square surface of the same size is provided that is parallel to the barrel axis and perpendicular to the square surface. Barrel polishing device 5 according to claim 1, wherein the mechanism for engaging and disengaging the barrel shaft and the rotating shaft is characterized in that the tapered end portion of the rotating shaft can enter and exit the tapered notch at the end of the barrel shaft. A barrel polishing device according to claim 1.