JP2643103C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a plurality of barrel pots for charging a mass, which is a mixture of a dry medium and an object to be polished, are revolved and revolved. relates a dry centrifugal barrel polishing apparatus for carrying out the dry centrifugal barrel polishing how you to dry polishing an object to be polished was in the barrel pot. 2. Description of the Related Art A dry barrel polishing method in which a mass, which is a mixture of a dry medium and a material to be polished, is charged into a barrel pot and the material to be polished is dry polished, is a natural plant fiber such as walnut. In the field of gloss finish polishing using dry media coated with a compound, it has been more widely used than before, but conventional dry media has insufficient polishing power, so a large amount of polishing such as deburring and rounding In the field of polishing, polishing efficiency is poor, and in this field, wet barrel polishing, which has a problem with environmental pollution such as wastewater treatment, has become the mainstream. However, recently, there has been a strong demand for solving the problem of environmental pollution.Therefore, it is also desired that the polishing field with a large amount of polishing such as deburring and rounding be performed by dry barrel polishing, which does not require wastewater treatment. In response to such demands, development of dry media capable of dry barrel polishing such as deburring and rounding has been advanced. [0003] However, the barrel pot of a centrifugal barrel polishing apparatus for performing deburring, rounding, and the like is usually of a sealed type so that wet polishing can be performed. When dry barrel polishing such as deburring or rounding is performed using dry media as described in the above-mentioned publication using the conventional centrifugal barrel polishing apparatus as it is, dust such as chips generated during the polishing operation is polished. There are problems such as discoloration of the material to be polished by adhering to the object, the dust adhering to the dry media and impairing the sharpness, and the temperature of the mass rising quickly to impair the barrel polishing function. Had occurred. In order to solve such a problem, Japanese Patent Application Laid-Open No. S57-57157 discloses an invention in which the required side surface of a barrel pot that revolves in a polishing chamber is formed into a sieve mesh so that dust can be sieved out during the polishing operation.
However, if the required side surface of the barrel pot is simply made into a sieve mesh, the amount of dust sieved off during the polishing operation is small, and the effect of preventing dust from adhering to an object to be polished or a dry medium and preventing mass The cooling effect of this is poor and the intended purpose cannot be achieved, and the polishing field where the amount of polishing such as deburring and rounding is large is still being carried out by wet barrel polishing, which is still environmentally problematic. [0005] In view of the above, the present applicant first performed dry barrel polishing with a dry medium using a fluid barrel polishing apparatus in which a work polishing rotary disk was horizontally rotatably mounted in a fixed tank. A compressed air feeder is connected to the space on the side of the machine, and the compressed air is blown upward from the gap between the turntable and the fixed tank to prevent dust from adhering to the material to be polished and the dry medium, and Has been proposed to increase the polishing effect by cooling, however, in centrifugal barrel polishing in which more efficient barrel polishing can be performed, the above-mentioned problems have not been solved yet. SUMMARY OF THE INVENTION The present invention solves the conventional problems as described above, and dusts such as cuttings generated during polishing work adhere to the object to be polished and the object to be polished is Discoloration, and the dust adheres to the dry media to impair the sharpness, and the mass temperature rises in a short time to impair the barrel polishing function, which may cause pollution from drainage and dust. The present invention has been completed for the purpose of providing a dry centrifugal barrel polishing apparatus for performing an efficient dry centrifugal barrel polishing method without any problem . [0007] According to an aspect of the present invention has been made in order to solve the aforementioned problem, it was charged mass into a plurality of barrel pots revolving disposed around the publicly rotating shaft In a dry centrifugal barrel polishing apparatus in which the object to be polished is dry polished by the dry medium flowing in each barrel pot, the outside air suction portion and the dust discharge through which the dry medium in the mass and the object to be polished cannot pass through each barrel pot. The dust discharge unit of each barrel pot revolving around its own axis is connected to the dust discharge unit of each barrel pot.
Revolves in line with the pot side duct that revolves with the pot and the barrel pot
An intermediate duct that does not rotate but has one end connected to the dust collector and the other end
Is a dry centrifugal barrel polishing apparatus, characterized in that the dry centrifugal barrel polishing apparatus is connected through a dust collector connection mechanism composed of a dust collector side duct rotatably connected to the dust collector side duct . Next, the present invention will be described in detail by way of an example of a rotary type dry centrifugal barrel polishing apparatus shown in the drawings. Reference numeral 1 denotes a centrifugal barrel polishing device main body. The centrifugal barrel polishing device main body 1 is installed inside a casing 2 provided with an intake port 2a on one side wall, and a driving motor installed outside the casing 2 3 is driven as described later. The centrifugal barrel polishing apparatus main body 1 is rotatably supported at both ends by revolving shaft supports 6 and 6 which are implanted in the housing 2 so as to face each other. Turrets 10 and 10 are rotatably mounted on both sides of a revolving shaft 9 which is rotated by a driving motor 3 connected through the turret 10, and four barrel pots 11 are equally spaced between the turrets 10 and 10. When the turrets 10 and 10 rotate about the orbital shaft 9 around the orbital shafts 8 at both ends, the turrets 10 and 10 rotate around the orbital shaft 9 in the opposite direction at the same speed and make a planetary rotational motion. Then, a mass, which is a mixture of a dry medium and a material to be polished, is charged into all the barrel pots 11 with the volume of each barrel pot 11 as a guide, and about each half of the barrel pot 11 rotates. Dry grinding of the object to be ground in the pot 11 by dry media is almost the same as a known centrifugal barrel grinding apparatus except for the details of the structure, but the barrel pot 11 has the following characteristic structure. . That is, each barrel pot 11 is a disc-shaped side plate 11 having a connecting tongue piece 11b.
A required side surface of an octagonal trunk 11c whose both ends are closed by a and 11a is opened, and a dry-type medium in the mass and a net-plate-like outside air suction unit 12 through which an object to be polished cannot pass are opened. The lid 11d is formed to be freely openable and closable.
c, a side surface facing the outside air suction portion 12 is formed in a mesh plate-shaped dust discharge portion 13. Further, between the discs 11a, 11a, the dust discharge portion 13 is covered and an empty space is formed therebetween. The tray 14 having the bulging cover portion 14a forming the
And one end of the bulging cover portion 14a is attached to the side plate 11a.
, 11a communicate with a short tube portion 15a protruding from the center of the outer surface through a communication passage 15b to form a pot-side duct 15, and a short tube portion 15a serving as a terminal of the pot-side duct 15.
Is opened outward through one of the turrets 10 as a dust collecting port. The lid 11d of the barrel pot 11 is mounted on a fixed shaft 21a stretched between the connecting tongues 11b, 11b of the side plates 11a, 11a as shown in FIGS. Is locked by the cam-type lock mechanism 21 operated so as not to come off during operation. Further, an annular short cylinder 23 is provided continuously at the center of the outside of the turret 10, and the annular short cylinder 23 is connected to a dust collection port at an end of the pot-side duct 15 with a communication passage 22. The intermediate duct 16 communicates with the barrel pot 1.
It revolves in accordance with one revolution, but does not rotate like the barrel pot 11. Further, a cover plate 24 having a duct connection portion is attached to the revolving shaft 9 so as to cover the tip opening of the annular short tube 23, and the duct connection portion and the dust collector 19 outside the casing 2 are connected with piping. One end is connected to the dust collector 19 and the other end is the intermediate duct 1
6 is connected to the dust collector side duct 17 so that the rotation of the intermediate duct 16 is allowed.
Is configured. The above-mentioned pot side duct 15 which is connected to the dust discharge portion 13 of each barrel pot 11 and revolves around the barrel pot 11, and the above-mentioned intermediate duct 16 which revolves according to the revolving of the barrel pot 11 but does not rotate. The dust discharge portion 12 of each barrel pot 11 revolves around itself with a dust collector-side duct 17 having one end connected to a dust collector 19 and the other end connected to the intermediate duct 16 so that the intermediate duct 16 can rotate. A dust collector connection mechanism 20 that is always connected to the suction port of the dust collector 19 is configured. The rotation of the barrel pot 11 in this embodiment is achieved by suspending the chain 27 from the first sprocket 25 attached to the shaft end of the rotation shaft 8 and the second sprocket 26 attached to the revolution shaft 9. It is supposed to be carried out. The dust collector connecting mechanism 20 that connects each barrel pot 11 to the dust collector 19 includes a pot-side duct 15 that is connected to the dust discharge unit 13 of each barrel pot 11 and revolves with the barrel pot 11 and revolves around. An intermediate duct 16 that revolves in accordance with the revolution but does not rotate, and a dust collector-side duct 17 having one end connected to the dust collector 19 and the other end rotatably connecting the intermediate duct 16 as described above. For example, as shown in FIG. 5, a pot-side duct 15 is formed by projecting one end of a bulging cover portion 14a similar to that of the above-described embodiment at the center of the outer surface of the side plates 11a, 11a. The intermediate duct 16 has a shallow vacant space 10a formed inside the turret 10 and the opening is formed at the opening thereof. The tubular end of the short cylindrical portion 15a of the duct 15 can be rotatably inserted, and an annular short cylindrical tube 23 communicated with the vacant space portion 10a through a communication passage 10b is provided on the outer surface of the turret 10. Further, the dust collecting side duct 17 also has a duct connection chamber 17a connected to the inside of the housing 2 so that the duct connection chamber 17a
Alternatively, the annular short piece 23 of the intermediate duct 16 may be rotatably inserted into the annular communication port 22a formed in the front plate portion. The above structure is a mixture of a dry medium having a high abrasive force, in which abrasive grains such as fused alumina are formed in all barrel pots 11 with a binder such as polyamide resin, and an object to be polished. When the motor 3 is driven in a state in which the mass is inserted, the turrets 10 and 10 rotate around the revolving shaft 9 via the first pulley 4 and the first belt 5, and simultaneously with this rotation, Since the rotation shaft 8 of the barrel pot 11 has the chain 27 suspended on the first sprocket 25 and the second sprocket 26, the planetary rotation motion of rotating around the revolution shaft 9 in the opposite direction at the same speed is performed. As a result, the mass flows while being subjected to a strong centrifugal force along the inner wall of the barrel pot 11 by the centrifugal force applied thereto, and the object to be polished rubs against the dry medium strongly, and deburring of the object to be polished and It will be carried out more abrasive machining of order processing other polishing amount, or never vary most with conventional centrifugal barrel polishing. However, in the present invention, each barrel pot 11 is provided with an outside air suction unit 12 and a dust discharge unit 13 through which dry media in the mass and the object to be polished cannot pass. Since the dust discharge section 13 is connected to the suction port of the separately installed dust collector 19 via the dust collector connection mechanism 20, the respective barrel pots 11 are connected.
The air acts on the inside of each barrel pot 11 through the mesh plate-shaped dust discharge portion 13 to introduce outside air from an outside air suction portion 12 formed in the barrel pot 11 so as to face the dust discharge portion 13. Since outside air is taken into the inside of the pot 11, the mass charged in the barrel pot 11 is passed through, and the dust collector 19 suctions the inside, the inside of the barrel pot 11 is crushed during grinding and the debris of the dry-type media or the coating is removed. Chips of the abrasive material are accurately suctioned and removed by the dust collector 19, and the mass inside the barrel pot 11 is cooled because external air is constantly introduced. That is, a pot-side duct 15 which is connected to the dust discharge portion 13 of each barrel pot 11 and revolves around itself, the above-described intermediate duct 16 which revolves according to the revolving of the barrel pot 11 but does not rotate, and a dust collector 19 And one end is connected to the intermediate duct 1
A dust collector connection mechanism 20 comprising a dust collector side duct 17 connected to the intermediate duct 16 so that the intermediate duct 16 is rotatable does not hinder each barrel pot 11 and the dust collector 19 from revolving around the barrel pot 11. Thus, the suction force of the dust collector 19 acts on the pot side duct 15 from the dust collector side duct 17 via the intermediate duct 16 while the barrel pot 11 is revolving around, and this suction force is applied to each barrel pot 11. The outside air is introduced from the outside air suction part 12 formed in the barrel pot 11 so as to act on the inside of each barrel pot 11 through the mesh plate-shaped dust discharge part 13 of the pot 11 so as to face the dust discharge part 13, The outside air is taken into each of the barrel pots 11 to allow the mass loaded in the barrel pots 11 to pass therethrough, and then the dust collector 19 sucks the air. The dust generated inside bets 11 while accurately suctioned off dust collector 19, to cool the interior of the mass of the barrel pot 11 by introducing outside air constantly is to prevent deterioration of the abrasive force of the dry media. Although the above embodiment has been described with reference to the case where the centrifugal barrel polishing apparatus main body 1 is of a revolving type, the present invention can be applied to a case where the present invention is applied to a horizontally rotating centrifugal barrel polishing apparatus main body 1 as shown in FIG. Needless to say, the same effect can be obtained. In this embodiment as well, a plurality of barrel pots 11 arranged around the revolving shaft 9 and revolving around the outside can prevent the dry medium in the mass and the outside air through which the object to be polished cannot pass. A dust collector 1 provided with a suction unit 12 and a dust discharge unit 13 and separately provided with a dust discharge unit 13 of each barrel pot 11 that revolves around its own axis.
9, the barrel pot 1 is connected to the dust discharge section 13 of each barrel pot 11.
1 and an intermediate duct 16 that revolves in accordance with the revolution of the barrel pot 11 but does not rotate, and one end is connected to the dust collector 19 and the other end rotatably connects the intermediate duct 16. It is the same as in the case of the embodiment described in detail above that the dust collector side duct 17 and the dust collector side duct 17 are connected by a dust collector connection mechanism 20. In any case, according to the present invention, during the polishing operation, the dust collector 19 connected to each of the barrel pots 11 takes in the outside air into each of the barrel pots 11, passes the mass through, and sucks the dust to cool the dust and mass. Is performed, dust such as chips generated in the barrel pot 11 can be collected accurately and easily, and the dust adheres to the object to be polished, discolors the object to be polished, and causes an It does not cause clogging and impair the sharpness, or raise the temperature of the mass in a short time to impair the barrel polishing function. In addition, since dust is always sucked and removed directly to the dust collector 19 for each barrel pot 11, there is no danger of dust pollution, and there is no danger of drainage pollution which cannot be avoided by conventional wet polishing due to dry polishing. Also, even with the same dry polishing, the initial cost and running time are reduced because dust is not scattered because dust is sieved from all barrel pots into the casing and dust is not collected. Both costs can be greatly reduced. (Experimental Example) Next, an example of the method of the present invention and a comparative example were prepared by using a barrel pot having an internal capacity of 8 liters in 4 pieces.
The number of revolutions was 180 rpm, the turning radius was R226, and RT10 manufactured by Shinto Breiter Co., Ltd. was used as a dry medium in an amount of 4 liters per barrel pot. A brass test piece of 22 mm in diameter and 15 mm in length was used as an object to be polished. Table 1 shows the experimental results of polishing the two pieces. In the example, the outside air suction portion corresponding to 1/8 of the body surface area, and a polishing process while suctioning each barrel pot by a dust collector using a barrel pot having a dust discharge portion formed on the opposite surface. As a comparative example, a case in which a closed barrel pot was used was referred to as Comparative Example 1, and the internal air was collected by a dust collector using a barrel pot having only an outside air suction portion corresponding to ８ of the body surface area. Comparative Example 2 was a case in which the device was installed in a casing in which was sucked. [Table 1] As is clear from the above description, the present invention always allows outside air to be taken into each barrel pot by a dust collector connected to each barrel pot during polishing to allow the mass to pass therethrough. Suction is used to collect dust and cool the mass, so that dust due to cuttings and the like generated inside the barrel pot during the polishing work adheres to the workpiece and discolors the workpiece, Does not adhere to the dry media and impair the sharpness, or the mass temperature rises in a short time and does not impair the barrel polishing function.
There are various advantages such as no risk of wastewater pollution or dust pollution. Accordingly, the present invention contributes to industrial development as a dry centrifugal barrel polishing method and a dry centrifugal barrel polishing apparatus used therefor which are much more efficient than the conventional dry centrifugal barrel polishing method and the dry centrifugal barrel polishing apparatus used therefor. Some are extremely large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention. FIG. 2 is a perspective view showing a barrel polishing apparatus main body of the first embodiment of the present invention. It is. FIG. 3 is a partially cutaway front view showing an example of a barrel pot used in the present invention. FIG. 4 is a partially cutaway side view showing an example of a barrel pot used in the present invention. FIG. 5 is a partially cutaway front view showing another embodiment of the dust collector connection mechanism of the present invention. FIG. 6 is a partially cutaway front view of an essential part showing an embodiment in which the present invention is applied to a horizontal rotary dry centrifugal barrel polishing. [Description of Signs] 9 Revolving shaft 10 Turret 11 Barrel pot 12 Outside air suction unit 13 Dust discharge unit 15 Pot side duct 16 Intermediate duct 17 Dust collector side duct 19 Dust collector 20 Dust collector connection mechanism

Claims (1)

Claims: 1. A plurality of barrel pots which are arranged around a revolution axis (9) and revolve around themselves.
The barrel (11) is charged with a mass and covered with dry media flowing in each barrel pot (11).
In a dry-type centrifugal barrel polishing machine designed to dry-polish the abrasive, each barrel polish
The air inlet (12) through which dry media in the mass and the material to be polished cannot pass
A dust discharge section (13) is provided to separate the dust discharge section (13) of each barrel pot (11) that revolves on its own axis.
Connected to the dust outlet (13) of each barrel pot (11) to the suction port of the dust collector (19)
A pot-side duct (15) that revolves around the barrel pot (11)
An intermediate duct (16) that revolves in accordance with the revolution of the cut (11) but does not rotate, and a dust collector (19)
One end is connected to the other end, and the other end is rotatably connected to the intermediate duct (16).
The communication was established via a dust collector connection mechanism (20) composed of a duct (17).
A dry centrifugal barrel polishing device characterized by the above-mentioned .