JPH03251361A - Longitudinal type dry barrel mirror surface polishing device - Google Patents

Abstract

PURPOSE:To permit the mirror surface polishing by supplying a workpiece, proper polishing members, and polishing oil into a barrel, revolving the rotary bottom part of the barrel by a barrel driving means, applying a centrifugal force on the content articles such as workpiece and polishing members, and allowing the content articles to flow and to be stirred between the rotary bottom part of the barrel, fixed frame part, and the inner peripheral surface of a porous plate. CONSTITUTION:A workpiece, polishing members, and polishing oil are supplied into a barrel 1. In the mirror surface polishing, the organic group polishing member such as walnut chips and corn chips is desirably used as polishing member. The drive of a motor 11 is transmitted to a rotary bottom part 7 through a pulley 12, belt 10, pulley 9, and a rotary shaft 8. A centrifugal force is applied to the content articles by the rotary bottom part 7. Then, the content articles are tilted, and aslantly rise along the peripheral surface of a fixed frame part 2, guided by a fixed porous plate 5, free from revolution, and descend, and this flow is repeated (direction of flow is shown by the arrow (a)). Accordingly, the content articles are sufficiently stirred, and polished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a barrel polishing device. For more details,
The present invention relates to a vertical dry barrel mirror polishing device that does not perform barrel mirror polishing using a vertical dry polishing material.

"Prior Art" Generally, a barrel device is known as a device that places a workpiece, abrasive material, and polishing oil in a rotating barrel and processes the surface of the workpiece to make it smooth.As conventional barrel processing For example, Japanese Utility Model Application Publication No. 61-181653 describes a device that rotates a horizontally placed barrel. In this device, a workpiece is polished by flowing an abrasive material at the bottom of the barrel. In addition, inorganic abrasive grains are used as the polishing material.

However, with this device, there is a limit to finishing accuracy, and mirror finishing, that is, processing as smooth as a mirror surface, is not possible. In order to eliminate such disadvantages of the conventional apparatus, the applicant of the present invention previously invented and proposed a barrel polishing method and apparatus capable of mirror polishing. This is patent application No. 63-9347
No. 1 (Japanese Unexamined Patent Publication No. 1-264765) was filed and published.

In this technology, an organic abrasive such as walnut chips or corn chips and polishing oil are placed in a horizontal (rotation axis is horizontal) rotating barrel. Then, the abrasive material is applied to the inner peripheral surface of the barrel by centrifugal force.

On the other hand, the workpiece holding means causes the machine tool to revolve along the inner circumferential surface of the barrel and rotate on its own axis, thereby stirring the workpiece in the abrasive material and mirror-polishing the workpiece.

[Problem to be solved by the invention] However, the barrel of the mirror polishing apparatus has the following problems.

In addition to rotating the barrel, the workpiece also revolves around the inner circumferential surface of the barrel and rotates on its own axis, making the drive mechanism complex and requiring a large amount of operating energy.

In addition, chips (metal powder) from the workpiece that are shaved off during operation and accumulated in the barrel act between the workpiece surface and the abrasive material, degrading the polishing quality.

The rotating axis of the barrel is horizontal, so loading and unloading workpieces is not easy.

It is an object of the present invention to provide a vertical dry type barrel mirror polishing device that can perform mirror polishing simply by driving the barrel, simplifying the mechanism and reducing operating energy.

Another object of the present invention is to provide a vertical dry type barrel tin surface polishing device that improves polishing quality by removing chips from the workpiece outside the barrel.

[Failure to solve the problem] In order to solve the above problem, the following measures are taken.

This barrel polishing device dry-polishes the surface of the workpiece by putting the workpiece and abrasive material into a rotating barrel (1). A divided barrel (1), a fixed frame part (2) to which the upper frame of the barrel (1) is fixed, and a lower part of the fixed frame part (2) having a number of holes. a perforated plate (5) for removing dust; a rotary bottom portion (7) in which the bottom portion of the barrel (1) is rotatable about a vertical central axis; and a rotary bottom portion of the barrel (1). This is a vertical dry type barrel mirror polishing device comprising barrel drive means (9 to 12) for rotating (7).

The fixed frame portion (2) may be formed into a polygonal shape. Further, the perforated plate (5) may be formed to be inclined toward the center as it goes from the fixed frame part (2>) to the rotating bottom part (7).

Furthermore, it is more effective to provide a convex portion (14) at the center of the rotating bottom (7) and insert a blade (14a) around the outer periphery of this convex portion (14).

[Operation] A workpiece, appropriate abrasive material and polishing oil are put into the barrel, and the rotating bottom of the barrel is rotated by the barrel driving means.
Centrifugal force is applied to the contents such as workpieces and abrasive materials to flow and stir the contents between the rotating bottom of the barrel, the inner circumferential surface of the fixed frame, and the inner circumferential surface of the perforated plate. At this time, chips from the workpiece, powder from deteriorated abrasive material, etc. are removed from the perforated plate to the outside of the barrel.

[Example 1] Hereinafter, one example of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the apparatus of this embodiment, FIG. 2 is a plan view, and FIG. 3 is a partially enlarged view of FIG. 1.

The barrel 1 is vertical, that is, the barrel is divided into a soil part and a bottom part. That is, the barrel 1 has an upper fixed frame part 2.
It consists of a perforated plate 5, and a rotating bottom part 7 at the bottom. The fixed frame portion 2 is a dodecagonal polygon. Fixed frame part 2
A perforated plate 5 is integrally attached to the lower part of the . This porous plate 5 is also a dodecagonal polygon. The fixed frame portion 2 and the perforated plate 5 are formed into polygonal shapes in order to improve the degree of agitation of the workpiece and the abrasive material (hereinafter collectively referred to as the contents).

The fixed frame portion 2 is fixed onto a machine stand 3 via a bracket 4. A perforated plate 5 having a large number of holes 5a extending downward to the upper surface of the rotary bottom part 7 is attached to the lower part of the fixed frame part 2 by holes 1-6. A rotary bottom portion 7 of the barrel 1 is disposed below the perforated plate 5 so as to be rotatable about a vertical central axis.

A flange 7a is fixed to the pole 1 at the center of the lower surface of the rotating bottom 7, and two ends of the rotating shaft 8 are connected to the flange 7a. A pulley 9 is fixed to the lower end of the rotating shaft 8. The pulley 9 and the belt 10 are connected to a first pulley 12 of a motor 11 equipped with a speed reducer. The rotating shaft 8 is rotatably supported by a bearing 8a. This bearing 8a is fixed to a bearing holding member 13. The bearing holding member 13 is fixed to the machine base 3. These rotating shaft 8, pulley 9, belt 10, pulley 12, and motor 11 constitute a barrel driving means.

The perforated plate 5 is inclined inwardly at an angle θ as it goes from the fixed frame portion 2 to the rotating bottom portion 7, and again from an intermediate position to an angle θ.
2 (see Figure 3). Angle θ
1 and θ2 are subjected to centrifugal force by the rotating bottom 7 and smoothly guide the rising contents to the inner circumferential surface of the fixed frame 2. The angles .theta.l and .theta.2 of the perforated plates are intended to increase the degree of agitation of the contents which are lifted by centrifugal force by the rotary bottom 7.

A curved central convex portion 14 is provided at the center of the upper surface of the rotating bottom portion 7 in order to gather the contents to the outer peripheral portion where centrifugal force is applied. Further, in order to effectively transmit the rotational force of the rotating bottom portion 7 to the contents and increase the degree of stirring, a plurality of ribs 15 are provided radially upright from the center of the upper surface.

The fixed frame part 2 and the rotating bottom part 7 are preferably made of wood in order to suppress the generation of metal powder due to friction with the contents. This is because metal powder becomes an obstacle to mirror finishing. However, the perforated plate 5
It is preferable to use a metal plate such as stainless steel to withstand collisions with the contents.

The apparatus of the embodiment constructed as described above operates as follows.

A workpiece, abrasive material, polishing oil, etc. are put into the operating barrel 1. For mirror polishing, it is desirable to use an organic abrasive such as walnut chips or corn chips as the abrasive. The drive of the motor 11 is transmitted to the rotating bottom part 7 via the pulley 12, belt 10, pulley 9, and rotating shaft 8. The rotating bottom 7 applies centrifugal force to the contents.

Then, the contents are tilted and the perforated plate 5 is fixed without rotating.
The fluid repeats the flow of diagonally rising and then descending along the inner circumferential surface of the fixed frame portion 2 (the direction of flow is indicated by arrow a). As a result, the contents are sufficiently stirred and polished. That is, the contents are subjected to centrifugal force and have tangential kinetic energy, and collide with the fixed perforated plate 5. Perforated plate 5 pressed by subsequent contents
rise along the surface of the

During operation, metal powder is generated as chips from the workpiece. Also,
If the perforated plate 5 is made of metal, metal powder will also be generated due to friction. This metal powder is harmful to mirror polishing. Therefore, in the present invention, when the contents collide with the perforated plate 5, and during the ascent, the metal powder is expelled from the barrel by inertia from the holes 5a of the perforated plate 5, and falls through the exclusion hole 16 (the first (Also indicated by the arrow in Figure 3).

(U- The above embodiment has the following advantages.

It is only necessary to rotate the rotating bottom part 7 of the barrel 1, and there is no need to revolve or rotate the workpiece, but the drive mechanism can be simplified and the operating energy can be reduced.

The fixed frame portion 2 of the barrel 1 is formed into a square shape. The perforated plate 5 is formed so as to be inclined toward the center as it advances from the fixed frame part 2 to the rotating bottom part 7 below, and smoothly transfers the contents rising due to the centrifugal force applied by the rotating bottom part 7 to the inner circumferential surface of the fixed frame part 2. I will guide you to.

Furthermore, the perforated plate 5 has an angle θ1. It is formed into a dogleg shape due to θ2. A plurality of ribs 15 are provided radially upright from the center of the -plane of the rotating bottom portion 7. At the center of the −F plane of the rotating bottom portion 7, a central convex portion 1.1 is provided ζ→. With these configurations, the degree of stirring of the contents can be increased. Therefore, polishing efficiency is improved.

Metal powder generated from the workpiece or the perforated plate 5 is removed from the holes 5 of the perforated plate 5.
Exclude from a to the outside of the barrel. Therefore, polishing accuracy is further improved. Since the bottom of the barrel is open, any of the contents can be refilled into the barrel 1 even during operation.

Embodiment 2" FIG. 4 is a longitudinal sectional view of the apparatus of the second embodiment, and FIG. 5 is a plan view thereof. The barrel 1 is vertical, ie, the barrel 1 is divided into a bottom part and a bottom part. That is, the barrel 1 has the same structure as the first embodiment in that it is composed of a fixed frame part 2 at the top, a perforated plate 5, and a rotating bottom part 7 at the bottom. Projecting members 2 are placed at equal intervals (every 120°) in the middle of the fixed frame 2.
A or three are installed. The shape of the protruding member 2a is
It has a triangular prism shape (Figure 5). Further, the fixed frame portion 2 is a dodecagonal polygon. Similarly, the perforated plate 5 integrally attached to the lower part of the fixed frame portion 2 has a dodecagonal polygonal shape.

The fixed frame portion 2 and the perforated plate 5 are formed into polygonal shapes in order to improve the degree of agitation of the workpiece and the abrasive material (hereinafter collectively referred to as the contents). The fixed frame portion 2 is fixed onto a machine stand 3 via a bracket 4. A perforated plate 5 having a large number of holes 5a extending to the rotary bottom part 7 is housed in the lower part of the fixed frame part 2 by a hole h6. A rotary bottom portion 7 of the barrel 1 is disposed below the perforated plate 5 so as to be rotatable about a vertical central axis.

A flange 7a is fixed to the center of the lower surface of the rotating bottom portion 7 with bolts. One end of the rotating shaft 8 is connected to this flange 7a. A pulley 9 is fixed to the F end of the rotating shaft 8. This pulley 9 and a pulley 12 of a motor 11 with a speed reducer are connected via bells 1 to 10. The rotating shaft 8 is rotatably supported by a bearing 8a. The bearing 8 a is fixed to a bearing holding member 13 , and the bearing holding member 13 is fixed to the machine base 3 . The rotating shaft 8, pulley 9, bell I-1, 0, pulley 12, and motor 11 constitute a barrel driving means.

A curved central convex portion 14 is provided at the center of the upper surface of the rotating bottom portion 7 in order to gather the contents to the outer peripheral portion where centrifugal force is applied. Three blades 14a are radially attached at equal intervals (every 120°) in the middle of the curved central convex portion 1 in the height direction. The blades 14a are provided with 1.1 blades 1 in order to increase the degree of agitation of the contents and further improve the polishing accuracy of the workpiece, and also to effectively transmit the rotational force of the rotating bottom portion 7 to the contents. In order to increase the degree of stirring, four ribs 15 are attached to the rotary bottom part 7 radially from the bottom position of the curved central convex part 14.

In addition, protruding columnar members 15a are attached to the fixed frame portion 2 side of the ribs 15, respectively, in order to direct the degree of agitation. During operation, metal powder is generated as chips from the workpiece. Further, if the perforated plate 5 is made of metal, metal powder will also be generated due to friction. This metal powder is harmful to mirror polishing. Therefore, in the present invention, when the contents collide with the perforated plate 5 and during -L rising, the metal powder is expelled from the barrel by inertia from the holes 5a of the perforated plate 5, and falls through the holes 16 of 411. It is already indicated by an arrow in FIG. ).

The fixed frame part 2 and the rotating bottom part 7 are preferably made of wood in order to suppress the generation of metal powder due to friction with the contents. This is because metal powder becomes an obstacle to mirror finishing. However, the perforated plate 5
It is preferable to use a metal plate such as stainless steel to withstand collisions with the contents.

The apparatus of the embodiment constructed as described above operates as follows.

3 4 Put the workpiece, abrasive material, and polishing oil into tor 1. For mirror polishing, it is desirable to use an organic polishing material such as walnut chips or corn chips as the polishing material. The motor 11 is driven by a pulley 12, a belt 10, a pulley 9,
It is transmitted to the rotating bottom part 7 via the rotating shaft 8.

A curved central convex portion 14 is attached to the rotating bottom portion 7. The blades 14a, which are radially attached at equal intervals in the middle of the central convex portion 14, are used to tilt the workpiece horizontally by 90 degrees, since a workpiece inside the contents, such as a frame of glasses, is incident vertically vertically. There is a function. Moreover, this serves to polish the entire workpiece, rather than just a portion of it.

The flare l\ of the glasses thus tilted laterally by 90 degrees is brought together with the abrasive material around the curved convex portion 14 by the centrifugal force generated by the rotation of the rotating bottom 7. Therefore, the contents collected around the curved convex portion 14 are
The rotational force of the rotary bottom 7 is applied by the ribs 1-5 attached to the rotary bottom, thereby further increasing the degree of agitation. Further, a speed difference occurs between the contents on the rib 15 and the contents on the protruding columnar member 1.5a attached to the rib 15. This speed difference causes a gap between the contents and the rotating body 7. The difference between the generated frictional force prevents the contents from sliding against the bottom surface of the rotating body 7. Furthermore, by doing so, the degree of agitation of the contents is increased and polishing accuracy is improved. Further, the contents are subjected to centrifugal force 4 by the rotating body and guided to the perforated plate 5 of the barrel. Furthermore, the contents guided to the perforated plate 5 are attached to the middle of the fixed frame part 2. A vortex is generated by the protruding member 2a having a triangular cross section and is returned to the curved central convex portion 14 side. The workpiece repeats the above-described movement to increase the degree of agitation and further improve polishing accuracy.

During operation, metal powder is generated as chips from the workpiece. Also,
If the perforated plate 5 is made of metal, metal powder will also be generated due to friction. This metal powder is harmful to mirror polishing. Therefore, in the present invention, the contents collide with the perforated plate 5.
During the second ascent, the metal powder is expelled from the barrel by inertia from the hole 5a of the perforated plate 5, and falls through the exclusion hole 16 (indicated by the arrow in FIG. 6). [Effect of the invention] As explained above. In this invention, a workpiece, an appropriate abrasive material, and polishing oil are put into a barrel, and the rotating bottom of the barrel is rotated by a barrel driving means to apply centrifugal force to the contents such as the workpiece and abrasive material. The contents are flowed and agitated between the rotating bottom and fixed frame and the inner peripheral surface of the perforated plate for polishing.

At this time, chips from the workpiece are removed from the barrel through the perforated plate.

Therefore, mirror polishing is possible simply by driving the barrel, simplifying the mechanism and reducing operating energy. In addition, the quality of mirror polishing can be improved by constantly removing workpiece chips and deteriorated abrasive material from the barrel.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing a first embodiment of a vertical dry type barrel mirror polishing device, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a partially enlarged view of Fig. 1, and Fig. 4 is a 5 is a plan view of FIG. 4, and FIG. 6 is a partially enlarged view of FIG. 4. 1. Barrel, 2.. Fixed frame portion, 5.. Perforated plate, 7.
...Rotating bottom, 8...Rotating shaft, 9, 12...Fly, 10...Bell 1~. 11. Motor, 14. Convex portion, 15. Rib, a. Flow direction of contents, 1].
・・Metal powder removal direction

Claims (1)

[Claims] 1. A barrel polishing device that dry-polishes the surface of a workpiece by putting a workpiece and an abrasive into a rotating barrel (1), the center axis of which is arranged vertically. a barrel (1) which is divided into an upper part and a bottom part; a fixed frame part (2) to which the upper frame of this barrel (1) is fixed; and a fixed frame part (2) provided at the lower part of this fixed frame part (2). a perforated plate (5) for removing dust having a large number of holes; a rotary bottom part (7) in which the bottom of the barrel (1) is configured to be rotatable about a central axis in the vertical direction; A vertical dry barrel mirror polishing device comprising: (1) barrel drive means (9 to 12) for rotating the rotating bottom (7); 2. The vertical dry barrel mirror polishing apparatus according to claim 1, wherein the fixed frame portion (2) is formed in a polygonal shape. 3. The vertical type according to claim 1 or 2, wherein the perforated plate (5) is formed to be inclined toward the center as it goes from the fixed frame part (2) to the rotating bottom part (7). Dry barrel mirror polishing equipment. 4. The vertical dry barrel according to claim 3, characterized in that a convex portion (14) is provided at the center of the rotating bottom portion (7), and blades (14a) are attached to the outer periphery of the convex portion (14). Polishing equipment.