JPH0457667A - Method and device for barrel polishing - Google Patents

Abstract

PURPOSE:To apply polish-finishing process to work pieces put into each polishing bath in a short time, uniformly and with high accuracy regardless of any complicated shape of each workpiece by polishing the workpieces by means of rotation of the polishing baths transmitted to the workpieces as well as a rotary drum in form of the same or different number of revolution via a rotational movement conversion mechanism. CONSTITUTION:Polishing effect of polishing material and on workpieces in each polishing bath 2, is increased owing to their orbital movement in pitching and rolling oscillation, that is, elliptical or football-like movement by applying eccentric rotation to each center 11 of each polishing bath 2 by means of each rotating axle 3. Moreover, movement of the polishing material and the workpieces in form of sliding, friction and agitation in each abrasive bath 2 becomes more complex and various by rotational difference between the axle of the polishing bath 2 and a rotary drum 1, and an effect of polishing the whole workpiece uniformly in a short time, with high quality, increases.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a barrel polishing method and apparatus, in which the center point of the polishing tank is separated from the axis of the tank shaft or tank support frame that rotates the polishing tank. By changing the core, the movement of the workpiece in the bath can be made into complex and diverse movements, and the entire workpiece can be polished and finished uniformly and with high precision in a short time.

(Prior art) Conventionally, in the Barrel 6JIIs method, a polishing cylinder (tank) is mounted on a frame or a drum, and the center point of the inner circumference of the polishing cylinder and the axis around which the polishing cylinder is rotated are concentric. There is a method of polishing by rotating the polishing cylinder with an electric motor or rotating it at the same time as the drum and applying centrifugal rotation, but in either case, the cylinder rotates around the center of its inner periphery, and the surface of the surface inside the cylinder is rotated. The flow (movement) of the workpiece and the abrasive material was in the same circular motion and only constant movement, and polishing was performed only by the avalanche-like movement of only the 11th layer of the mass.

(Problems to be solved by the invention) However, with this method, there are many problems such as uneven polishing, polishing residue on concave parts, curved surfaces, and back side parts, resulting in an uneven finish, and dents on the workpiece. There was a problem.

In addition, with such a polishing method, even if the rotation speed is slowed down and the polishing is carried out for a long time until the objective is achieved, sufficiently high quality polishing cannot be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a barrel polishing method and apparatus that can uniformly polish and finish a workpiece with high precision in a short time.

(Means for Solving the Problems) In order to achieve the above object, the barrel polishing method and apparatus of the present invention change the polishing tank 2 by slightly shifting the center point of the polishing tank 2 and the axis of rotation to change the center of the polishing tank 2. The present invention solves the conventional problems by making a complex rotation rich in speed, and also provides a mechanism for increasing or decreasing the rotation speed of the rotation of the rotary drum 1 and the rotation speed of the shaft for rotating the polishing ff2 to different rotation speeds. , a polishing tank 2 that rotates in conjunction with a rotating rotary drum 1
After loading the abrasive material 7, workpiece 8, etc. into the rotary drum 1, the rotation of the polishing tank 2 is changed from the same as that of the rotary drum 1 to increased rotation, decreased rotation, etc. via a transmission mechanism. The workpiece 8 is polished by rotating it in a manner suitable for the purpose.

(Function) According to the present invention configured as described above, the abrasive material 7 or workpiece 8 inside the tank is rotated by rotating the center point of the polishing tank 2 by eccentrically rotating the center point of the polishing tank 2 from the axis that rotates five times. It moves in an elliptical or rugby ball-like manner, moving up and down and left and right in the tank, increasing the polishing effect.

Furthermore, due to the difference in rotation between the rotation of the rotary drum 1 and the polishing tank shaft 3 that rotates the polishing NI 2, the sliding, friction, and stirring movements of the abrasive material 7 or the workpiece 8 inside the polishing tank 3 become more complex and diverse. It is highly effective in polishing the entire workpiece uniformly and with high quality in a short time.

By using this invention, even an apprentice worker can open the lid of the polishing tank 2 and pour a specified amount of the workpiece or polishing material into it without requiring special skills unlike conventional manual processing techniques. The polishing process is completed when a predetermined polishing time has elapsed based on a timer by putting in the polishing material, closing the lid of the tank, and starting the electric motor M.

(Example) Embodiments of the present invention will be described below based on the drawings.

Reference numeral M in the drawings indicates an electric motor, which is the driving force for moving the barrel polishing apparatus of the present invention.

Reference numeral 1 denotes a reel-shaped rotary drum, which is rotatably supported around a main shaft 4 by main bearings 6 provided on the left and right inner sides of the polishing apparatus main body 12.

Further, a large pulley 10 is integrally attached to the rotary drum 1.

Reference numeral 2 denotes a polishing tank which is installed in the polishing tank holder 2a after enclosing the abrasive material 7 and the workpiece 8, and there are a plurality of polishing tanks 2 (three in the drawing) located close to the outer periphery of the rotary drum 1. The enclosed abrasive material 7 and workpiece 8 are rotated differently from the rotation of the rotary drum 1 through a converter (not shown) that is provided with a combination of gears and the like.
Because it performs fluidized polishing under complicated conditions not seen before, extremely precise polishing can be achieved.

3 is a shaft protruding outward on both sides of the polishing tank support 2a,
The polishing tank support 2a is configured to rotate around this shaft 3.

4 is the main shaft of the rotary drum 1;
is adapted to constantly rotate in a circle around this main shaft 4, and the main shaft 4 is supported by main bearings 6 provided on the left and right inner sides of the main body A of the polishing apparatus.

The shaft 3 of the polishing tank support 2a of the present invention configured as described above
As shown in Figure 3, it is also possible to change the center of the shaft, and by moving the shaft in this way, a complex rotation that has never been seen before can be made, and the shaft can be moved into a polishing tank. If the center of the bearing 2δ or the center line of the polishing tank is changed in a tilted manner, the rotation will be more complicated, so it will be effective in gloss polishing and mirror polishing that require extremely precise polishing.

(Effects of the Invention) Since the present invention is configured as described above, no matter how complicated the shape of the workpiece placed into the polishing tank, it can be polished uniformly in a short time and with extremely high precision. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the relationship between the rotary drum and polishing tank of the present invention, Fig. 2 is a plan view of Fig. 1, and Figs. 3 a and b are front views of a polishing tank holder with an eccentric axis. Figure 4 is a side view of the polishing tank with the shaft center eccentric, Figure 5 is the front view of Figure 4, and Figure 6 is a side view of the polishing tank with the shaft center eccentric. Figure 7 is a diagram showing the flow state of the abrasive material and workpiece during operation with lines, and Figure 8 is a diagram showing the flow state of the abrasive material and workpiece in an eccentric state. Figure 9 is a diagram showing the flow state of the abrasive and workpiece in a state where the abrasive material and the workpiece are tilted, Figures 10a and 10b are front and right side views of the embodiment of the present invention, and Figures 11a and 11b are b is a front view and a right side view showing an example of the conventional method, and FIG. 12 is a diagram showing a polishing state by the conventional method. Rotary drum 2: Polishing tank 2a/polishing tank bearing 2b = Polishing tank fixture 3: Polishing tank shaft 4: Main shaft 5: Conduction band 6: Main bearing 7/abrasive material 8: Workpiece 9: Lid ] 0: Large Pulley 11: Center point of polishing tank 12: Polishing machine main body Figure 1 Figure 2 Figure 10 Figure 12

Claims (1)

[Claims] 1) A rotatable polishing tank is provided on a rotating rotary drum, and an abrasive material, a workpiece, or a combination thereof is introduced into the polishing tank, and the rotation of the polishing tank is controlled. A barrel polishing method characterized in that a workpiece is polished by applying the same rotation or a different rotation to the rotary drum through a conversion mechanism. 2) A polishing material or a workpiece, or a combination thereof, is put into a polishing tank which is configured by changing the center of the polishing tank shaft or polishing tank mounting frame shaft to different centers of the polishing tank. Provides the same rotation or different rotation with the rotating drum,
2. The barrel polishing method according to claim 1, wherein the polishing process is performed by making a complicated rotational movement. 3) A rotary drum rotated by an electric motor and a rotating polishing tank provided around the outer periphery of the rotary drum, each of which is caused to rotate through a transmission rotation device, and the polishing material loaded in the polishing tank is rotated by a rotary drum. Alternatively, a barrel polishing device is characterized in that the workpiece or the workpiece is configured to generate pressurization and complicated stirring and flow in the polishing tank. 4) The polishing tank can be installed by changing the center of the polishing tank to different centroids between the polishing tank axis or the polishing tank mounting frame axis and the center of the polishing tank, and the polishing tank can be rotated with the rotating drum at the same time or given different rotations to create complex and diverse designs. 4. The barrel polishing device according to claim 3, wherein the barrel polishing device is configured to generate a rotational motion. 5) In a barrel polishing machine that consists of a rotary drum rotated by an electric motor and a rotating polishing tank provided around the outer periphery of the rotary drum, and rotates by giving arbitrary rotation, the polishing tank or inside the polishing tank 5. The barrel polishing apparatus according to claim 3, further comprising a balance weight, a flywheel, or a heavy pulley for preventing vibrations caused by unbalanced rotation of the polishing tank or machine caused by a difference in the weights loaded on the barrel.