KR20220070913A - Centrifugal barrel finishing apparatus - Google Patents

Abstract

The present invention relates to a centrifugal grinder comprising: a barrel forming a grinding chamber for accommodating a work involving a plurality of grinding materials for grinding the work, and grinding the surface of the work by making friction between the grinding materials and the work using centrifugal force; and one or more dividers arranged to be able to be attached to and detached from the grinding chamber and dividing the grinding chamber. The divider includes: a pair of division plates having the same section shape with the grinding chamber and arranged with a gap therebetween; a guide arranged between the pair of division plates and having one or more inclination parts formed in at least one region of the circumference thereof to be inclined; a fixing member arranged to be able to move along the inclination parts of the guide and protruding from the circumference of the division plates while moving along the inclination parts, and fixed to the grinding chamber; and a combination part for combining the pair of division plates. Therefore, provided is a centrifugal grinder capable of variably adjusting and dividing the grinding space of a barrel conveniently.

Description

Centrifugal grinding machine {CENTRIFUGAL BARREL FINISHING APPARATUS}

The present invention relates to a centrifugal grinder.

In general, in order to polish the surface of a machined workpiece, a polishing method in which the workpiece is rubbed with an abrasive and polished is widely used.

As one of such grinding methods, a centrifugal grinding machine using a barrel is widely known.

A centrifugal grinding machine using a barrel includes a cylindrical barrel into which a work to be polished and an abrasive for grinding the surface of the work are put, and the abrasive and the work come into contact with each other by rotation and revolution of the barrel. As a result, the surface of the workpiece is polished or polished by frictional motion.

Thereby, impurities, scale, burrs, etc. generated on the surface of the work are removed, and the surface of the work is processed in a clean state.

On the other hand, when such a centrifugal grinder wants to grind various types of work, one or a small number of works must be put into each barrel constituting the centrifugal separator and grinded during one grinding operation, so there is a problem that the production of the centrifugal separator is reduced. have.

In order to solve this problem, a partition plate is welded to the inside of each barrel of the centrifugal grinder to form a plurality of abrasive spaces having the same or different volumes inside the barrel, and corresponding to each abrasive space partitioned by the partition plate After accommodating the workpiece to be polished, grinding has been carried out.

However, in this conventional centrifugal grinder, the partition plate is fixed to the inside of the barrel by welding, and as the grinding space to be polished is determined in advance, it is very limited in variably adjusting the inside of the barrel in response to the type of work and grinding, so the barrel can not be used efficiently, work productivity is lowered, there is a problem that the production cost also rises.

Domestic Registered Utility Model Publication No. 20-0288581

SUMMARY OF THE INVENTION The present invention is to solve the above problems, and an object of the present invention is to provide a centrifugal grinder capable of easily variably controlling and dividing a grinding space of a barrel.

An object of the present invention is to form a polishing chamber accommodating a workpiece and a plurality of abrasives for polishing the workpiece, and use centrifugal force to rub the abrasive with the workpiece to polish the surface of the workpiece; and at least one divider detachably provided in the polishing chamber to partition the polishing chamber, wherein the divider includes a pair of partition plates having the same cross-sectional shape as that of the polishing chamber and spaced apart from each other; a guide disposed between a pair of the partition plates and having one or more inclined portions inclinedly formed in at least one region of the circumference; a fixing member movably provided along the inclined portion of the guide, protruding from the circumference of the partition plate as the inclined portion is moved, and fixed to the polishing chamber; And it can be achieved by a centrifugal grinder comprising a coupling portion for coupling the pair of partition plates.

Here, the guide may have a disk shape, and the inclined portion may be provided along the circumference of the guide.

The fixing member may be rotatably coupled to any one of the pair of partition plates.

The coupling portion includes a female screw portion and a bolt having a male screw portion screwed to the female screw portion, the female screw portion is formed on any one of the pair of partition plates, and the female screw portion is formed on the other one of the pair of partition plates. A coupling hole in communication with the part and through which the bolt is coupled may be formed.

When the divider is temporarily assembled in the polishing chamber, the coupling portion couples the pair of partition plates so that the fixing member is accommodated between the pair of partition plates, and when the divider is fixed to the polishing chamber, the The coupling part may couple the pair of partition plates so that the fixing member partially protrudes from the pair of partition plates.

As the bolts are fastened to the female screw portion, the pair of partition plates approach each other and move the fixing member along the inclined portion, so that the fixing member may partially protrude from the pair of partition plates.

According to the present invention, it is possible to efficiently use the barrel by easily variably controlling and dividing the grinding space of the barrel in response to various types of work, improving work productivity, and reducing production cost.

1 is a block diagram of a centrifugal grinder according to an embodiment of the present invention;
Figure 2 is a perspective view of the barrel of Figure 1;
3 is a perspective view of the divider of FIG. 2;
Figure 4 is an exploded perspective view of Figure 3;
5 is a front view showing a state in which the divider according to the present invention is released;
Figure 6 is a longitudinal cross-sectional view of Figure 5;
7 is a cross-sectional view taken along line AA of FIG. 6;
8 is a front view showing a state in which the divider according to the present invention is fixed;
9 is a longitudinal sectional view of FIG. 8;
FIG. 10 is a cross-sectional view taken along line BB of FIG. 8 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully understand the scope of the present invention to those skilled in the art, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components. Like reference numerals refer to like elements throughout, and "and/or" includes each and every combination of one or more of the recited elements. Although "first", "second", etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein will have the meaning commonly understood by those of ordinary skill in the art to which this invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless specifically defined explicitly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a centrifugal grinder according to an embodiment of the present invention.

As shown in these figures, the centrifugal grinder 1 according to an embodiment of the present invention includes a barrel 10 and a divider 20 .

The barrel 10 has a hollow barrel shape of a certain length. Although the barrel 10 in this embodiment has a hexagonal cross-sectional shape, the barrel 10 may have any one of a circular, elliptical, and polygonal cross-sectional shape.

A polishing chamber 11 having a predetermined volume is formed inside the barrel 10 , and the polishing chamber 11 accommodates a work to be polished and a plurality of abrasives for polishing the work. The polishing chamber 11 has a structure and a size capable of inputting a plurality of workpieces.

In the polishing chamber 11 of the barrel 10, that is, the inner surface of the barrel 10 may be provided with a lining 13 finished with a rubber material. Accordingly, when the workpiece accommodated in the polishing chamber 11 is polished, it is possible to prevent the workpiece from being damaged by colliding with the inner surface of the barrel 10 finished with a rubber material.

In addition, a draw-out inlet 15 for drawing a workpiece, a plurality of abrasives, and a divider 20 into and out of the polishing chamber 11 is formed through one side wall of the barrel 10 .

The withdrawal inlet 15 has a length and a width corresponding to one side wall of the polishing chamber 11 , and is formed to communicate with the polishing chamber 11 . The draw-out inlet 15 is opened and closed by the cover 17 , and the draw-out inlet 15 is closed by the cover 17 during the grinding operation of the barrel 10 .

On the other hand, in the centrifugal grinder 1 according to the present invention, although not shown, a plurality of barrels 10 are rotatably installed in the frame 3 constituting the skeleton of the centrifugal grinder 1 , the axis of the turret 5 . They are spaced apart along the perimeter. In addition, each barrel 10 revolves about the axis of rotation of the turret 5 and is installed so as to be rotatable on the turret 5 at the same time. Accordingly, when the turret driving means 7 and the barrel driving means 9 are respectively driven to rotate the turret 5 and the plurality of barrels 10 of the centrifugal separator in opposite directions, the grinding chamber 11 is The received abrasive and the work rub against each other by the centrifugal force generated in the barrel 10, thereby grinding the surface of the work.

The divider 20 is detachably provided in the polishing chamber 11 to partition the polishing chamber 11 into a plurality of polishing spaces 11a, 11b, and 11c.

In the present embodiment, a pair of dividers 20 are provided to divide the polishing chamber 11 into polishing spaces 11a, 11b, and 11c each having three different volumes, but the present invention is not limited thereto, and the divider One or more (20) may be provided to divide the polishing chamber (11).

The divider 20 includes a pair of partition plates 21a and 21b, a guide 25, a fixing member 30, and a coupling part.

The pair of partition plates 21a and 21b have a plate shape of a predetermined thickness and are spaced apart from each other. A pair of partition plates (21a, 21b) are coupled at intervals by a coupling portion.

Each of the partition plates 21a and 21b has the same cross-sectional shape as the polishing chamber 11 . Accordingly, the partition plates 21a and 21b according to an embodiment of the present invention have a hexagonal shape corresponding to the cross-sectional shape of the polishing chamber 11 . has a cross-sectional shape of Here, the cross-sectional shapes of the partition plates 21a and 21b may correspond to various cross-sectional shapes of the polishing chamber 11 and may be deformed.

In addition, the pair of partition plates 21a and 21b is larger than the size of the cross-sectional area of the polishing chamber 11 so as to be loosely fitted with the inner surface of the polishing chamber 11 when provisionally assembled to partition the polishing chamber 11 . It has a small cross-sectional area.

Hereinafter, for convenience of description of the invention, a pair of partition plates will be divided into a first partition plate 21a and a second partition plate 21b.

The guide 25 is disposed between the pair of partition plates 21a and 21b. The guide 25 in this embodiment has a disk shape of a certain thickness.

The guide 25 has a cross-sectional shape in which the diameter gradually increases as the outer periphery goes from one plate surface to the other plate surface. Accordingly, an inclined portion 27 inclined from one plate surface to the other plate surface is provided around the guide 25 . In accordance with the mutual approach and separation of the pair of partition plates (21a, 21b) to the inclined portion (27), the fixing member (30) is slidably moved.

The plate surface having a large diameter of the guide 25 is supported on the plate surface of the first partition plate 21a.

Here, although the guide 25 is illustrated as having a disk shape in the present embodiment, the present invention is not limited thereto, and the guide 25 may have an elliptical or polygonal cross-sectional shape. Also, the inclined portion 27 may be formed in at least one region around the guide 25 .

In addition, a through hole 29 through which a bolt 45 of a coupling portion to be described later is inserted is formed through the center of the guide 25 .

The fixing member 30 has a bar shape having a predetermined length and width, and is provided to be movable along the inclined portion 27 of the guide 25 .

The plurality of fixing members 30 are disposed along the outer periphery of the guide 25 and are rotatably coupled to the first partition plate 21a. One end of the fixing member 30 is rotatably coupled to the first partition plate 21a by means of a pin 31 , and the fixing member 30 moves along the inclined portion 27 of the guide 25 and moves along the first The partition plate 21a turns inside or outside.

Therefore, in the state in which the divider 20 is temporarily assembled in the polishing chamber 11, the fixing member 30 is on the plate surface of the guide 25 toward the second partition plate 21b as shown in FIGS. 5 to 7 . While being mounted, it is accommodated between the first partition plate 21a and the second partition plate 21b so as not to protrude to the outside of the divider 20 . Accordingly, the divider 20 may be loosely fitted to the inside of the polishing chamber 11 . Hereinafter, for convenience of explanation, a state in which the fixing member 30 is accommodated in a pair of partition plates 21a and 21b, for example, a state in which the divider 20 can be temporarily assembled in the polishing chamber 11 is referred to as a fixed release state. .

In addition, in a state in which the divider 20 is fixed to the polishing chamber 11 , the fixing member 30 is disposed to partially protrude from the pair of partition plates 21a and 21b. The fixing member 30 is in close contact with the plate surface of the first partition plate 21a as shown in FIGS. 8 to 10 , and partially protrudes from the circumference of the pair of partition plates 21a and 21b. Accordingly, a frictional force is generated between the fixing member 30 partially protruding from the circumference of the pair of partition plates 21a and 21b and the inner surface of the polishing chamber 11, so that the fixing member 30 of the divider 20 is By being press-fitted to the inner surface of the polishing chamber 11 , the divider 20 is fixed to the polishing chamber 11 without being oscillated. Hereinafter, for convenience of description, a state in which the fixing member 30 partially protrudes from the pair of partition plates 21a and 21b, for example, a state in which the divider 20 is fixed to the polishing chamber 11 is referred to as a fixed state.

Here, in the present embodiment, three fixing members 30 are provided, but the present invention is not limited thereto, and one or more fixing members 30 may be provided.

The coupling portion includes a female screw portion 41 and a bolt 45 having a male screw portion 49 screw-coupled to the female screw portion 41, and couples a pair of partition plates 21a and 21b.

The female screw part 41 is provided to penetrate the center of the first partition plate 21a.

The bolt 45 has a head 47 formed at one end, and a male screw portion 49 screwed with the female screw portion 41 is provided on an outer peripheral surface excluding the head 47 .

The bolt 45 is through-coupled to the coupling hole 23 formed through the second partition plate 21b. The coupling hole 23 is formed concentrically with the female threaded portion 41 and penetrated therethrough.

In this way, as the bolt 45 is tightened to the female screw portion 41, the pair of partition plates 21a and 21b approach each other and move the fixing member 30 along the inclined portion 27, the fixing member ( 30 is partially protruded from the pair of partition plates 21a and 21b.

More specifically, when the divider 20 is temporarily assembled in the polishing chamber 11, the bolt 45 and the female screw part ( 41) combines a pair of partition plates 21a and 21b.

Further, when the divider 20 is fixed to the polishing chamber 11 to partition the polishing chamber 11, the fixing member 30 partially protrudes from the pair of partition plates 21a and 21b. And the female screw part 41 combines a pair of partition plates 21a and 21b.

Accordingly, the divider 20 of the centrifugal grinder 1 according to an embodiment of the present invention is supported on the plate surface of the first partition plate 21a in which the guide 25 faces the second partition plate 21b, The plurality of fixing members 30 are rotatably coupled to the first partition plate 21a along the circumference of the guide 25 .

Then, by coupling the first partition plate 21a and the second partition plate 21b with the bolt 45 and the female screw part 41, the assembly of the divider 20 is completed.

With this configuration, the process of partitioning the polishing chamber 11 of the centrifugal grinder 1 according to an embodiment of the present invention will be described as follows.

First, the pair of partition plates 21a and 21b are coupled with the bolt 45 and the female screw part 41 so that the fixing member 30 is accommodated between the pair of partition plates 21a and 21b. Accordingly, the divider 20 is in the unfixed state.

Next, a pair of dividers 20 in an unlocked state are inserted into the polishing chamber 11 through the draw-out inlet 15 of the barrel 10 to temporarily assemble. At this time, as the fixing member 30 does not protrude from the pair of partition plates 21a and 21b , the divider 20 is loosely fitted into the polishing chamber 11 .

On the other hand, in the present embodiment, a pair of dividers 20 are spaced apart from each other at different intervals along the longitudinal direction of the barrel 10 as shown in FIG. 2 in the polishing chamber 11 , to form three abrasive spaces 11a, 11b, and 11c having different volumes.

In a state in which the pair of dividers 20 are temporarily assembled in the polishing chamber 11, when the bolts 45 of each divider 20 are tightened and coupled to the female screw part 41, the second partition plate 21b is formed into the first partition. It approaches the plate 21a, and thereby, as shown in FIG., the fixing member 30 mounted on the plate surface of the guide 25 facing the second partition plate 21b is the inclined portion of the guide 25. It rotates while sliding along (27), and is in close contact with the plate surface of the first partition plate (21a), and partially protrudes from the circumference of the pair of partition plates (21a, 21b).

The fixing member 30 partially protruding from the circumference of the pair of partition plates 21a and 21b comes into close contact with the inner surface of the polishing chamber 11 , and thus the fixing member 30 and the inner surface of the polishing chamber 11 . A frictional force is generated therebetween, and the divider 20 is press-fitted to the inner surface of the polishing chamber 11 , and the divider 20 is in a fixed state in which the polishing chamber 11 does not swing and is fixed.

In this way, when the polishing chamber 11 of the barrel 10 is divided into a plurality of polishing spaces 11a, 11b, and 11c having different volumes by the divider 20, each partitioned polishing space 11a, 11b, 11c ) and abrasives are accommodated in each of the abrasive spaces 11a, 11b, and 11c partitioned through the withdrawal inlet 15 of the barrel 10, and then the cover 17 is coupled to the barrel 10 and taken out. The inlet 15 is closed.

Then, when the turret 5 and the barrel 10 are respectively rotated in opposite directions, the abrasive and the work accommodated in the respective polishing spaces 11a, 11b, and 11c of the polishing chamber 11 are generated in the barrel 10 The surface of the workpiece is polished or polished by rubbing while contacting each other by centrifugal force.

Thereby, impurities, scale, burrs, etc. generated on the surface of the work are removed, and the work surface can be processed in a clean state.

On the other hand, when the bolt 45 of the divider 20 is loosened from the female screw part 41 in the fixed state of the divider 20, the fixing member 30 partially protruding from the pair of partition plates 21a and 21b is a guide It becomes movable along the inclined portion 27 of (25), so that it can be accommodated between the pair of partition plates (21a, 21b). Accordingly, the divider 20 is in an unfixed state, and the divider 20 is loosely coupled to the inner surface of the polishing chamber 11 so that it can be easily separated from the polishing chamber 11 .

As described above, according to the present invention, after the divider is temporarily assembled in the polishing chamber of the barrel, the fixing member is partially protruded by tightening the coupling part of the provisionally assembled divider, and each By fixing the divider to the polishing chamber, it is possible to partition the polishing chamber of the barrel into a plurality of polishing spaces having a desired volume.

Accordingly, it is possible to efficiently use the barrel by easily variably controlling and dividing the grinding space of the barrel in response to various types of work, improving work productivity, and reducing production costs.

As mentioned above, although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing the technical spirit or essential features thereof. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: Centrifugal grinder
10: barrel
11: polishing chamber
20: divider
21a, 21b: partition plate
25: Guide
27: inclined part
30: fixing member
41: female thread part
45: bolt
49: male thread part

Claims (6)

a barrel which forms a polishing chamber accommodating a work and a plurality of abrasives for grinding the work, and uses centrifugal force to rub the abrasive with the work to polish the surface of the work; and
one or more dividers detachably provided in the polishing chamber to partition the polishing chamber;
The divider is
a pair of partition plates having the same cross-sectional shape as the polishing chamber and spaced apart from each other;
a guide disposed between a pair of the partition plates and having one or more inclined portions formed to be inclined in at least one region of the circumference;
a fixing member movably provided along the inclined portion of the guide, protruding from the circumference of the partition plate as the inclined portion is moved, and fixed to the polishing chamber; and
A centrifugal grinder comprising a coupling portion for coupling a pair of the partition plates. The method of claim 1,
The guide has a disk shape, and the inclined portion is provided along the circumference of the guide, centrifugal grinding machine. The method of claim 1,
The fixing member is rotatably coupled to any one of the pair of partition plates, centrifugal grinding machine. The method of claim 1,
The coupling portion includes a female screw portion and a bolt having a male screw portion screwed to the female screw portion,
A centrifugal grinding machine, wherein the female screw portion is formed on any one of the pair of partition plates, and a coupling hole communicating with the female screw portion and through which the bolt is coupled is formed in the other one of the pair of partition plates. 5. The method of claim 4,
When the divider is temporarily assembled in the polishing chamber, the coupling portion couples the pair of partition plates so that the fixing member is accommodated between the pair of partition plates,
When the divider is fixed to the polishing chamber, the coupling portion engages the pair of partition plates so that the fixing member partially protrudes from the pair of partition plates. 5. The method of claim 4,
As the bolts are fastened to the female threaded portion, the pair of partition plates approaches each other and moves the fixing member along the inclined portion, so that the fixing member partially protrudes from the pair of partition plates.

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