JP2001232552A - Rotary barrel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a barrel device capable of separating polishing dust and decontaminated radioactive material from abrasive and polished object without needing large-scale facility when polishing is done using a sealed barrel. SOLUTION: In this rotary barrel device, a hollow and wedge-shaped lining member 2 having a sieve part 3 on its bottom face is additionally fixed on an inner face of the rotatable barrel by directing the sieve part 3 in the direction of rotation, and grinding dust and decontaminated radioactive material are separated from the abrasive and polished object through the sieve part 3 while the barrel rotates and are recovered inside the lining member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel polishing apparatus used for deburring and surface finishing of a metal material, and more particularly to a rotary barrel apparatus capable of separating from a polishing material without requiring large-scale equipment. is there.

[0002]

2. Description of the Related Art Rotary barrel polishers and oscillating barrel polishers have been widely used for deburring, surface finishing, and matting of metal materials. It is also applied to decontamination of materials. Then, as a polishing method, an object to be polished or a decontaminated material is put into a barrel and an abrasive is blown together with compressed air, or an abrasive and an object to be polished are put into a barrel, and rotation, vibration and swinging are performed. Is known.

A barrel 1 having a polygonal shape as shown in FIG. 6 is usually used as a barrel used in a rotary barrel device and a swing barrel device, into which an object to be polished and an abrasive are charged. In general, as shown in the figure, the apparatus is operated in a horizontal state, and is rotated, vibrated or rocked for polishing and decontamination.

[0004]

However, in the above-described conventional barrel apparatus, relatively large-scale equipment such as an exhaust fan, a separation filter or a dust collector is required to separate the abrasive and the dust. . Especially when radioactive material decontaminates contaminants attached to the surface, since the abrasive contains radioactive material, the adhering material and the abrasive decontaminated from the viewpoint of reducing worker exposure and preventing contamination from spreading. Separation was a critical issue, for which the need for relatively large equipment was unavoidable. Therefore, development of a barrel device that does not require such a large-scale device is desired. In addition, when using a device such as the swinging barrel described above, polishing is performed in a sealed barrel, so a large-scale separation is not required as in an air-blown dry barrel polishing device that is not rotating or swinging. After removing from the barrel,
Since an operation for separating the abrasive is required, there is a demand for an apparatus capable of separating the barrel which does not need to be taken out in a sealed state.

SUMMARY OF THE INVENTION The present invention addresses the above-described circumstances and, in response to that need, finds to provide a lining with a sieve for screening abrasives, especially on the side surfaces within the barrel, thereby providing a large facility. An object of the present invention is to make it possible to efficiently separate and collect abrasives and grinding dust without requiring it, and to improve the effect of decontaminating contaminants particularly by workers.

[0006]

That is, according to the present invention, which is adapted to the above-mentioned object, a hollow wedge-shaped lining material having a sieve portion on a bottom surface is provided on the inner surface of a rotatable barrel by turning the sieve portion in a rotating direction. It is characterized in that grinding dust and decontaminated radioactive substances are separated and recovered from the abrasive or the object to be polished into the lining material through the sieve portion while the barrel is rotating.

The second aspect of the present invention is a preferred embodiment of the hollow wedge-shaped lining material, wherein a belt-shaped slope is provided inside the hollow wedge-shaped lining material obliquely along the rotation direction between both side surfaces, and the barrel is rotated. At the same time, grinding dust and contaminated radioactive material are moved along the belt-like slope by rotational force, and are collected from a discharge port on one side of the lining material into a grinding dust collecting part provided with a barrel. It is also effective to provide a compressed air intake port at the top of the barrel and a compressed air outlet at the bottom where grinding chips collect.

According to a fourth aspect of the present invention, a mesh having a sieve selected according to the size of the abrasive is attached to the back side of a sieve opening such as a slit or a hole provided on the bottom surface of the lining material. It is characterized by the following configuration. In the above configuration, the barrel has a polygonal shape, and the lining material is placed inside each side of the polygon.
Preferably, one or two or more are attached, and the lining material is desirably the same material as the barrel body or a material resistant to wear.

[0009]

When a barrel is polished for decontamination of an object to be polished having a radioactive substance adhered to the surface thereof by using the rotary barrel apparatus of the present invention, the object to be polished (contaminated object) is contained in the barrel. When the abrasive is thrown, the barrel is rotated, and further vibration and oscillation are applied.Since the size of the sieve prevents the contaminated material and abrasive from entering the slit, only the grinding debris separates. The grinding chips move along the slope of the feed belt in the lining due to the rotation of the barrel along with the rotation of the barrel, so that the grinding chips are collected at the grinding chip collecting portion without leaving the grinding chips attached to the filter. . Stop the barrel operation, remove the barrel, and remove the collected grinding chips from the removal hole at the bottom of the grinding waste collection part, or remove the bottom part and discharge it, or leave the compressed air outlet at the bottom with the compressed air flowing. The air is discharged together with the air and connected to the dust collector and other transport processes. In this way, the abrasive and the object to be polished are separated from grinding dust and dust mixed with radioactive contaminants.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 shows an outline of a barrel of a rotary barrel device according to the present invention, in which a lining material 2 provided with a sieve for selecting abrasives is attached and disposed on a side surface inside a polygonal barrel 1. Thereby, the barrel 1 is configured. In FIG. 1, the lining material 2 is provided on the inner surface of the polygonal shape as a projection directed to each side, but is not limited to one, and may be directed to two as shown in FIG. 5, or more. It may be addressed to.

FIG. 2 shows the details of the lining material 2.
A sieve portion 3 having a hollow wedge shape and provided with slits 3a and holes 3b is formed on the bottom surface thereof so that the object to be polished does not enter, and the sieve portion 3 on the bottom surface is oriented in the barrel rotating direction. It is attached to the inside of the barrel.

The sieve part 3 is provided with the slit 3a and the hole 3b.
A mesh 5 whose sieve can be changed according to the size of the abrasive is attached to the back side of the lining material 2 to which the mesh 5 is attached, with a screw 4 or the like appropriately attached according to the size of the abrasive. As shown in FIG. 3, there is provided a feed belt formed of a belt-shaped slope 6 attached diagonally along the rotation direction, and the grinding chips move along the slope 6 by receiving the rotational force with the rotation of the barrel. , Is collected in a grinding dust collecting portion 8 provided at the bottom of the barrel shown in FIG.

Here, in the case of a rotary barrel device, the polishing material is usually Al ₂ having a size of 40 μm to several mm.
O ₃ , SiO ₂ , Si particles, or aramid fiber with Si
Depending on the material to be polished and the purpose of use, a mixture of C, SiO ₂ and diamond can be used. For this reason, as described above, it is preferable that the mesh 5 is appropriately attached so that the sieve can be changed according to the size of the abrasive. In the above, the collected grinding chips are stopped, the operation is removed, the barrel is removed, and the collected grinding chips are discharged from the removal hole of the grinding waste collecting portion.Instead of the removal hole, the entire bottom of the barrel can be removed and discharged therefrom. You may do so.

FIG. 4 shows a barrel apparatus which is particularly suitable for barrel-polishing an object to be polished having a radioactive substance adhered to its surface for decontamination. A compressed air intake 10 is provided in a lid 9 on the upper part of the barrel 1. The compressed air is fed into the barrel 1 through the passage 12 through the mesh 11, and the compressed air passage 13 is connected to the collecting portion 8 at the bottom where grinding dust is collected.
Compressed air is taken out from the take-out port 14 through the outlet to collect in the swarf collecting unit 8 without flying in the barrel or leaving swarf adhered to the inner surface of the barrel 1 or the feed belt 6. FIG. 4A shows a case where the flow portion of the compressed air is provided at the center of the barrel 1, and FIG. 4B shows a case where the flow portion of the compressed air is provided at the periphery of the barrel 1. is there. In either case, the state of collecting grinding dust is the same.

Then, the collected grinding waste is taken out from the hole 16.
Alternatively, it is discharged from the collecting section 8 at the removable bottom, or connected to the next transfer step through the compressed air outlet port 14 while the air is flowing, for example, to a duct collector or the like, so that the duct collector can be opened without opening the barrel lid. Etc. can be connected.

The upper or lower part of the barrel is usually operated in a horizontal state, but may be in a vertical state instead of a horizontal state during use.
Further, since the removal of the polishing debris is carried out in a vertical position, it is referred to as the top and bottom of the barrel. In addition, the barrel may be rocked or vibrated with rotation. Further, in the above-described barrel apparatus of the present invention, the mesh 5 or the lining material 2 with the mesh can be removed to use the material to be polished and the abrasive in the barrel 1 to collect and reuse the abrasive.

The lining material 2 attached to the inner surface of the barrel 1 has a projection having a width for attaching the mesh 5 to the bottom surface as described above, so that the abrasive and the object to be polished are efficiently contacted and mixed. The effect which makes it do can also be acquired. Usually, the lining is made of the same material as the barrel main body or a material resistant to wear, for example, stainless steel or super steel.

Thus, the use of the above-described barrel device of the present invention makes it possible to separate abrasives and grinding dust without requiring a large-scale separation device, and particularly for decontaminating contaminants having radioactive substances adhered to the surface. Effective results were obtained for this.

[0020]

As described above, according to the present invention, a hollow wedge-shaped lining material having a sieve portion on the bottom surface is attached to the inner surface of the rotatable barrel with the sieve portion directed in the rotation direction.
Grinding debris and decontaminated radioactive material are separated and recovered from the abrasive or polished material inside the lining material through the sieve during the barrel rotation, and the inside of the hollow wedge-shaped lining material is rotated across both sides. A belt-shaped slope is provided diagonally along the shaft, and grinding debris and contaminated radioactive material are moved along the belt-shaped slope by rotating force with the rotation of the barrel, and the grinding debris attached to the barrel is attached from the discharge port on one side of the lining material. The grinding waste and decontaminated radioactive material can be efficiently separated and collected in the grinding waste collecting part at the bottom during operation, and the inside of the barrel is covered by the lining material on the inner surface. Since the projection is formed, the polishing effect can be further improved.

In particular, since the barrel of the present invention has a lining material having a sieve as described above, a separate exhaust fan and a filter for separation are required for separating abrasive and dust as in the conventional barrel device. And therefore, it is possible to separate abrasives and grinding debris while operating without the use of a large-scale separation device, and radioactive substances must be attached to the surface, which requires attention to worker exposure and diffusion of contaminants. A great effect can be expected for the decontamination of the contaminated materials.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the internal configuration of a barrel according to the present invention.

FIG. 2 is a view showing a lining material which is a feature of the present invention;
(A) is an external view schematic diagram, (B) is a diagram showing another mode of the sieve portion, and (C) is a back surface state diagram of the sieve portion.

FIG. 3 is a schematic perspective view showing an internal structure of a lining material.

FIGS. 4A and 4B are diagrams showing the overall configuration of the barrel, in which FIG. 4A is provided with an air flow passage at the center, and FIG.

FIG. 5 is a schematic diagram showing the internal configuration of another embodiment of the barrel according to the present invention.

FIG. 6 is a schematic view of a known barrel, (a) is a front view,
(R) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Barrel 2 Lining material 3 Sieve part 5 Mesh 6 Belt-shaped slope (feed belt) 7 Discharge port 8 Grinding waste collecting part

Claims (6)

[Claims] 1. A hollow wedge-shaped lining material having a sieve portion on a bottom surface is attached to an inner surface of a rotatable barrel in a direction of rotation of the sieve portion, and grinding dust and dust are removed through the sieve portion during rotation of the barrel. A rotating barrel device, wherein dyed radioactive material is separated and collected from an abrasive or an object to be polished into a lining material. 2. A belt-like slope is provided obliquely along the direction of rotation between both side surfaces inside a hollow wedge-like lining material, and grinding debris and contaminated radioactive substances are removed along the belt-like slope by the rotational force with the rotation of the barrel. The rotary barrel device according to claim 1, wherein the rotary barrel device is moved from the discharge port on one side of the lining material to be collected in a grinding dust collecting part provided with the barrel. 3. A compressed air intake port is provided at an upper part of the barrel,
3. The rotary barrel device according to claim 1, wherein a compressed air outlet is provided at a bottom portion where the grinding dust is collected. 4. The sieve portion is constructed by attaching a mesh having a sieve selected according to the size of the abrasive to the back side of a sieve opening such as a slit hole provided on the bottom surface of the lining material. Or the rotary barrel device according to 3. 5. The rotary barrel device according to claim 1, wherein the barrel has a polygonal shape, and at least one lining material is attached inside each side of the polygon. 6. The rotary barrel device according to claim 1, wherein the lining material is made of the same material as the barrel body or a material resistant to wear.