JPH0253190B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides an upper opening into which a predetermined amount of mass (abrasive material and workpiece, or abrasive material and workpiece plus water, compound, etc., refers to the contents of a barrel tank) is charged. A plurality of barrel tanks are mounted on the turret, and the upper part of the barrel tank is inclined inward so that the central axis of the barrel tank always intersects the upward extension of the vertical main axis of the turret. This relates to a barrel polishing device characterized in that the workpiece is polished by rotating around the main axis of the barrel and rotating around the center axis of the barrel tank to prevent the mass from leaking out from the opening of the barrel tank. be.

Conventional centrifugal barrel polishing machines are widely used due to their high polishing efficiency, but they have had the problem of requiring a great deal of time and effort to attach and remove the lid, and if automated, they would become complicated devices. That is, in the conventional centrifugal barrel polishing machine, as shown in FIG. 1A, when the centrifugal force increases, the mass in the barrel tank (the shaded area in FIG. 1) stands upright.
Therefore, if there is no lid, the mass will leak out from the upper opening of the barrel tank as shown by arrow a, and even if the barrel tank is tilted as shown in Fig. When the barrel tank is rotated to a certain position, the mass escapes from the opening as shown by the arrow b in the same manner as described above. Therefore, in the apparatuses A and B in FIG. 1, if the number of rotations is selected so that the mass does not escape from the barrel tank, the polishing efficiency will be severely reduced and the original characteristics of the centrifugal barrel polishing machine will be lost.

However, according to the present invention, as shown in FIG. 2, a plurality of upwardly opening barrel tanks are attached to the turret so that the central axis Z of the barrel tanks always intersects with the upward extension Y of the vertical main axis of the turret. Attach the barrel tank with the upper part tilted inward by α degree, and rotate the barrel tank at high speed around the main axis of the turret, centrifuging the mass inside the barrel tank in the direction of the orbit of the outer circumferential rotation of the peripheral wall and bottom of the barrel tank. By applying a force to the inner wall of the barrel tank, the barrel tank rotates around its central axis to move the mass, so even if the centrifugal force increases, a certain amount of mass (depending on the shape of the barrel tank) (selected appropriately depending on the inclination angle), the workpiece was polished without leakage from the opening, and a highly efficient polishing device was successfully obtained.

The details of the present invention will now be explained with reference to the attached drawings regarding the implementation device. Figures 3 to 5 show an embodiment of the present invention.
The rotating shaft 1 is rotatably inserted into the bearing 7 supported by the horizontal shafts 5a and 5b to the turret 3, and the bottom plate of the barrel tank 2, which is open at the top, is fixed to the upper end of the rotating shaft 1. A tapered rubber roller 12 with a plumbum is fixed to the lower end of the polishing unit A to constitute an integrated polishing unit A, and the horizontal shafts 5a and 5b are supported by bearings 6a and 6b installed on the turret 3. The polishing unit A is rotatably suspended as shown in FIG. The polishing unit A
The turret 3, having a plurality of evenly mounted turrets, is horizontally mounted on a vertical main shaft 4 which is rotated via a motor 8, a sprocket or pulley 9, a chain or belt 10, and a sprocket or pulley 11. These devices are all housed in a machine frame 13, and a rubber fixed guide rail 14 is fixed to the inner periphery of the machine frame 13.
The contact surface 14a of the rubber roller 12 is inclined to correspond to the tapered portion of the rubber roller 12, so that smooth sliding contact can be made.

To explain the operation of the implementation device,
When the turret 3 is stopped, the polishing unit A is held upright by the weight of the rubber roller 12 at the lower end as shown in the chain diagram A' in Fig. 3, and the opening of the barrel tank 2 is facing directly upward. . Therefore, workpieces, abrasive materials, etc. are loaded using a separate loading device. The amount of mass to be charged hangs down from a point B (shown in Figure 2) around the uppermost part of the barrel tank during tilted rotation, includes a straight line that intersects with the bottom surface or lower periphery of the barrel tank, and is centrifugal that is applied to the mass. It is necessary that the amount does not exceed the amount that fills the space (including the shaded area in FIG. 2) formed by the plane perpendicular to the direction of the force and the outer periphery and bottom inner wall of the barrel tank. Further, the center of gravity of the polishing unit A must be located below the bearing 7 during mass charging. Next, when the motor 8 is driven to rotate the turret 3 at high speed as shown by arrow C, the polishing unit A rotates around the main shaft 4 while tilting as shown by A'' in Fig. 3, and the rubber roller 12 is fixed. Guide rail 14
sliding contact. Due to this sliding contact, the central shaft 1 rotates as indicated by the arrow d. Therefore, the barrel tank 2 is tilted inward at the upper part of the barrel tank so that its center axis always intersects with the extension line of the vertical main axis 4, and revolves around the main axis 4, so that the barrel can be attached to the mass inside the barrel tank. A centrifugal force is applied to the circumferential wall and the bottom of the tank in the direction of the rotation outer circumferential locus to press them against the inner wall of the barrel tank, and the barrel tank is rotated about its central axis 1 to move the mass and separate the workpiece and abrasive material. The workpiece is polished with an abrasive material by the relative movement of the When polishing is completed, stop the motor 8 and the rubber roller 12 will be moved to the fixed guide rail 1.
4, the rotation of the barrel tank 2 stops, and the polishing unit automatically stops in the initial state shown at A' in FIG. Next, pressure fluid is introduced into the piston side of the hydraulic cylinder 31 set on the turret 3, and the clutch 28 attached to the tip of the piston rod of the rotary cylinder 30 that passes through the bearing 29 is advanced, and the horizontal shaft 5b is moved forward. It is fitted with a clutch 27 attached to the tip of.
Subsequently, fluid pressure is sent to the rotating cylinder 30 to rotate the horizontal shaft 5b at a constant angle. As a result, the polishing unit A is rotated to the outside of the turret 3, and the mass is discharged from the upper opening of the barrel tank 2, completing one process.

In addition, when handling the above-mentioned barrel tank as a barrel case, the upper opening barrel tank with a handle is fitted into the barrel case. In this case, since there is no need to rotate the barrel tank, it is sufficient to tilt the bearing 7 from the beginning and fix it to the turret so that the rubber roller of the barrel shaft and the fixed guide rail are always in sliding contact. Therefore, after polishing is completed, the barrel tub is removed from the barrel case and the mass is taken out.

Also, as shown in FIG. 6, the central shaft 1 and the rubber roller 12 protruding below the bearing 7 in FIG. 16 is fixed from the outside above the outside of the turret 3, and a supporting fixed guide rail 17 is fixed inside the turret 3. When the turret is stopped, the barrel tank is supported by the supporting fixed guide rail 17, and there is a gap between the rubber roller 15 and the fixed guide rail 16. When the turret is rotated, the rubber roller 15 fixed to the barrel tank slides against the fixed guide rail 16 due to centrifugal force, causing the barrel tank to rotate. In this way, it is not necessary to lower the center of gravity below the bearing 7 as in the devices shown in FIGS. 3 to 5, so that stability can be increased. Further, if the fixed guide 16 is made movable up and down, it is also possible to automatically discharge the mass using the rotating device shown in FIG. 4. In the above embodiment, the rubber roller was provided in the barrel tank, but the same effect can be obtained if the rubber roller is provided in the central shaft.

Furthermore, the embodiment shown in FIG.
A chain or belt 22 connects the sprocket or pulley 21 fixed to the connecting shaft 20.
and a central shaft 1 fixed to a barrel case or barrel tank 2 are connected by a universal joint 23, and the turret 3 can be rotated via a motor 24, a pulley 25, and a belt 26. When turned in the direction of e, the connecting shaft 20 rotates in the direction of the arrow f, and the central shaft 1 rotates in the direction of g via the universal joint 23. Therefore, if the diameters of the sprockets or pulleys 19 and 21 are the same, the ratio n/N between the number of rotations n and the number of revolutions N can be set to -1. The angle of inclination of the barrel tank 2 can be adjusted as appropriate by inserting a bolt fixed to a bearing 32 into a long hole 34 provided in a bracket 33 and fixing it with a nut.

In each of the above-described embodiments, the shape of the barrel can be a prismatic shape a, a cylindrical shape b, a spherical shape c, or a bottle shape ranging from a rectangular shape d to a circular shape e, as shown in FIG. If the top is narrow and the bottom is wide like the C, D, and E-shaped barrel tanks mentioned above, a large amount of contents can be charged. However, since it is inconvenient to discharge, a device for cleaning and discharging using water pressure is required. Further, the inclination angle α of the barrel tank can be selected from 10° to 70°, but it is best to select around 45°. If the angle of inclination is less than 10 degrees, the amount of mass charged will be small and it is not practical, and if it is more than 70 degrees, the mass movement will be poor and there will be a lot of waste in the structure. Taking this into consideration, the optimal inclination angle is 45° inward or outward.

As described above, according to the present invention, when attaching a plurality of upwardly opening barrel tanks to a turret, the central axis of each barrel tank is inclined inward and the barrel tanks are caused to revolve around the main axis of the turret at high speed. Applying centrifugal force to the mass in the barrel tank in the direction of the orbit of the circumference of the circumferential wall and bottom of the barrel tank to press the mass against the inner wall of the barrel tank, while rotating the barrel tank about its central axis to move the mass. Since it is constructed so that the turret and barrel tank are rotated at high speed, the mass does not escape from the upper opening, and the workpiece is polished by relative movement with the abrasive material. Therefore, this invention has great advantages such as not only making it possible to perform high-speed centrifugal barrel polishing in an upwardly opening barrel tank, which was conventionally difficult to implement, but also eliminating the need for attaching and detaching the lid, which was the key to automation. It is.

[Brief explanation of the drawing]

Fig. 1 is a simplified diagram showing a conventional centrifugal barrel polishing method, Fig. 2 is a simplified diagram showing a barrel polishing method of the present invention, Fig. 3 is a front sectional view of an apparatus for carrying out this invention, and Fig. 4 is a 3 is an enlarged front view of polishing unit A, FIG. 5 is an enlarged side view, FIG. 6 is a partially enlarged side view showing another embodiment, and FIG. 7 is a partially enlarged side view showing another embodiment. 8 are perspective views of barrel tanks of various shapes used in the apparatus implementing the present invention. 1... Central shaft, 2... Barrel tank, 3... Turret,
4...Main shaft, 5a, 5b...Horizontal axis, 6a, 6b...Bearing, 7...Bearing, 8...Motor, 9...Sprocket or pulley, 10...Chain or belt, 11
...Sprocket or pulley, 12...Rubber roller, 13...Machine frame, 14...Fixed guide rail, 15
...Rubber roller, 16...Fixed guide rail, 17
... Supporting guide rail, 18... Bearing, 19... Sprocket or pulley, 20... Connection shaft, 21... Sprocket or pulley, 22... Belt, 23...
Universal joint, 24...Motor, 25
...Pulley, 26...Belt, 27...Clutch, 2
8...Clutch, 29...Bearing, 30...Rotating cylinder, 31...Fluid pressure cylinder, 32...Bearing, 33
...Bracket, 34...Long hole.

Claims (1)

[Scope of Claims] 1. A plurality of barrel tanks are rotatably mounted at equal intervals on the outer periphery of a horizontal turret that is mounted on a vertical main shaft that rotates the barrel tanks at high speed to apply centrifugal force. In the polishing apparatus in which the tank rotates and revolves, the barrel tank is tiltable so that the center line of the vertical main axis and the center line of the central axis of the barrel tank intersect at an acute angle above the turret, A barrel polishing device, wherein the barrel polishing device is mounted to rotate on its own axis, and the barrel tank is opened upward. 2. The barrel polishing apparatus according to claim 1, wherein the turret and the barrel tank are mounted such that a bearing for the central axis of the barrel tank is tiltable on a horizontal axis on the turret.