JP4047244B2 - Multistage centrifugal deoiling equipment - Google Patents

Description

  The present invention relates to a multistage centrifugal deoiling apparatus used for removing oil adhering to various workpieces manufactured by machining, for example.

When manufacturing workpieces such as bolts and nuts by machining, machine oil is used in the machining process, so to remove the oil attached to the intermediate workpiece during the machining process and the workpiece that has finished machining A centrifuge is used. In order to enhance the deoiling effect by the centrifuge, a plurality of deoiling tanks are arranged in a vertical stage in one centrifuge, and the work is moved to the plurality of deoiling tanks in stages to deoil. A multistage centrifugal deoiling apparatus is known (see Patent Document 1).
JP-A-10-328581

  As shown in FIG. 12, the multistage centrifugal deoiling apparatus described in Patent Document 1 includes a plurality of deoiling tanks 2 in which a rotating drum 1 of a centrifuge that rotates around a central axis extending in a vertical direction moves up a plurality of deoiling tanks 2. A plurality of deoiling tanks 2 arranged in a lower stage, communicated with each other through the central opening 3, and arranged above the central opening 3 of each deoiling tank 2 apart from the deoiling tank 2. A saucer 4 is attached to and supported by a common support shaft 5 in an upper and lower step shape. Then, the oil removal tank 2 and the receiving tray 4 are simultaneously rotated, and the workpiece A placed on the receiving tray 4 is fly-fed to the oil removing tank 2 by centrifugal force, and the oil is removed from the inner peripheral wall of the oil removing tank 2 in an attached state. When the rotation of the rotating drum 1 is stopped, the rotation of the deoiling tank 2 and the tray 4 is reduced, and the centrifugal force is reduced, and the workpiece A falls from the deoiling tank 2 and moves to the lower tray 4. Accordingly, the upper opening of the uppermost deoiling tank 2 is used as the inlet 6, and after the workpiece A introduced from the inlet 6 is placed on the uppermost tray 4, the deoiling tank 2 and the tray 4 are rotated and stopped. By repeating, the workpiece A is dropped and moved from the uppermost deoiling tank 2 stepwise to the lower deoiling tank 2 via the receiving tray 4, and the lower opening of the lowermost deoiling tank 2 is discharged. The workpiece A is discharged from the machine as an outlet 7.

  However, the above-described multistage centrifugal deoiling apparatus moves the workpiece A from the receiving tray 4 by the centrifugal force and moves it to the deoiling tank 2 when the receiving tray 4 starts rotating and a predetermined centrifugal force is applied. It is necessary to rotate the tray 4 at high speed, and the workpiece A flying by this centrifugal force not only collides with the inner peripheral wall of the deoiling tank 2 but also collides with another workpiece A that has already reached the inner peripheral wall. As a result, there is a problem that scratches, i.e., dents, are generated due to collision on both sides, resulting in a defective product.

  Further, when the deoiling tank 2 and the tray 4 stop rotating and the centrifugal force declines, the workpiece A naturally falls from the deoiling tank 2 to the lower tray 4 and moves. In this case, the lower tray 4 There is a workpiece A that falls further downward without being mounted on the machine, and there is a problem that it is discharged outside the machine with insufficient deoiling.

  The present invention solves the above-described problems, and can smoothly move the workpiece contained in the tray to the deoiling tank due to centrifugal force, suppress the occurrence of scratches (dents) due to collision, and processing It is an object of the present invention to provide a multi-stage centrifugal deoiling device that can perform uniform and effective deoiling while ensuring the movement of a product to a lower deoiling tank.

  In order to achieve the above object, an invention according to claim 1 of the present invention includes a rotating drum that rotates about a central axis extending in a vertical direction, and a tilt in a downward direction toward the central opening in the rotating drum. A multi-stage deoiling tank formed by providing a funnel-shaped partition wall having a conical slope to the upper and lower stages at a predetermined interval in the axial direction, and a saucer disposed at the center of each deoiling tank, A support shaft that is disposed in a central portion of the rotating drum so as to be capable of moving up and down in the axial direction, and that supports the tray so as to be rotatable in an up-and-down manner, and when the support shaft is raised, Close to the lower edge of the opening of the upper deoiling tank, and when the support shaft is lowered, the trays come into contact with the upper edge of the opening of the lower deoiling tank and are sealed together with the rotating drum. The workpiece stored in the tray is moved to the inner peripheral wall side of each deoiling tank by centrifugal force. It was characterized by de-oil. The rotating drum is made of a metal mesh or a perforated plate, and the partition wall and the tray are manufactured by pressing a metal plate. The partition wall and the tray can be manufactured by molding a resin material.

  According to a second aspect of the present invention, when each of the trays is in contact with the upper end of the opening of the lower deoiling tank and is sealed when the support shaft is lowered, the peripheral edge of the lower tray and the upper end of the opening of the lower deoiling tank A large step is not generated between the edge and the edge so that the workpiece can be smoothly moved from the tray to the deoiling tank by a centrifugal force at the start of rotation of the rotating drum.

  As in the invention according to claim 3, the multistage receiving tray is preferably attached to the cylindrical shaft rotatably fitted on the support shaft at a predetermined interval in the axial direction so as to be integrated as a whole.

  According to a fourth aspect of the present invention, a supply hopper having a charging port is disposed at an upper end opening of the rotating drum, and the uppermost tray is brought into contact with a lower edge of the charging port when the support shaft is raised. The rotation is stopped, and a predetermined amount of the workpiece supplied through the charging port is accommodated in the tray.

  In the above configuration, when a predetermined amount of workpiece supplied through the inlet of the supply hopper is stored in the uppermost tray, the support shaft is lowered, and the multistage trays are lowered in conjunction with this. Then, the lower end deoiling tank is brought into contact with the upper edge of the opening and sealed. Subsequently, when the rotating drum starts rotating, each tray rotates together with the rotating drum, and the workpiece placed on the receiving tray moves smoothly along the conical slope of the deoiling tank by centrifugal force, Further, the oil moves to the inner peripheral wall side of the rotating drum, and the oil adhering to the workpiece is removed by centrifugal force while being pressed against the inner peripheral wall. When the deoiling process elapses for a certain period of time, the support shaft rises, and in conjunction with this, each tray rises, and the uppermost tray comes into contact with the lower edge of the supply hopper inlet and stops rotating. , And wait until the next workpiece is supplied from the inlet. At this time, the other receiving trays are close to the lower end edge of the opening of the upper deoiling tank, but are not in contact with each other and are stopped with a slight gap. When the rotation of the rotating drum stops in this state, the centrifugal force declines. Therefore, the workpiece deoiled in the uppermost deoiling tank slides on the conical slope with its own weight, and the second step from the center opening. It falls and moves into a tray. During this time, the next workpiece is supplied to the uppermost tray. The support shaft is lowered again and the same operation as described above is repeated, and the work is moved stepwise from the upper deoiling tank to the lower deoiling tank to remove the adhering oil by centrifugal force. Increases the effect. Here, the deoiling process in each deoiling tank is performed in a state where the upper end edge of the central opening is sealed in each tray, so that the workpiece does not unexpectedly fall from each deoiling tank during the deoiling process. . Further, the workpiece is moved from the upper deoiling tank to the lower deoiling tank in a state where the tray is close to the lower end of the central opening of the upper deoiling tank. There is no risk of deoiling failure due to falling into the water.

  In the multistage centrifugal deoiling apparatus of the present invention, the workpiece is smoothly moved by the centrifugal force from the tray containing the workpiece to the deoiling tank, and the occurrence of scratches (dents) due to the collision can be reduced. In addition, the stepwise movement of the workpiece from the upper deoiling tank to the lower deoiling tank can be reliably performed via the tray, and there is no risk of the work falling unexpectedly downward, and a uniform and effective deoiling process. Is done.

  In the multistage centrifugal deoiling apparatus of the present invention, the workpiece is smoothly moved by the centrifugal force from the tray containing the workpiece to the deoiling tank, and the occurrence of scratches (dents) due to the collision can be reduced. In addition, the stepped movement of the workpiece from the upper deoiling tank to the lower deoiling tank can be reliably performed via the tray, and there is no risk of the work falling unexpectedly downward, and uniform and effective deoiling is possible. Done.

  FIG. 1 shows a schematic configuration diagram of a multi-stage centrifugal deoiling apparatus according to the present invention. Reference numeral 10 denotes a rotating drum which forms the main part of the apparatus. Like a known centrifuge, an electric motor and other appropriate rotations are shown. It is rotated around the central axis 0-0 extending in the vertical direction by the driving device. The rotary drum 10 has a cylindrical side wall 11 made of a wire mesh or a perforated plate. A funnel-shaped partition wall body 12 having a conical upper inclined surface 13 inclined downward toward the central opening 14 is disposed in the rotary drum 10 in an upper and lower step shape at predetermined intervals in the axial direction. Multi-stage (five stages in the illustrated example) deoiling tanks 15 to 19 are formed. The partition body 12 is made by joining a metal plate and a metal pipe. The partition wall 12 constituting the bottom deoiling tank 19 also serves as the bottom plate 20 at the lower end opening of the rotary drum 10, and the central opening 14 serves as the discharge port 21. A supply hopper 23 having a charging port 24 is disposed in the upper end opening 22 of the rotary drum 10. The inlet 24 has substantially the same diameter as the central opening 14 of the partition wall 12 and is arranged coaxially.

  The trays 25 to 29 are disposed in the central portions of the oil removal tanks 15 to 19. The trays 25 to 29 are formed in a disc shape having a slightly inner diameter that is slightly larger than the outer diameter of the central opening 14 of the partition wall 12, and are arranged along the central axis 0-0 of the rotary drum 10. In addition, it is rotatably supported on a support shaft 30 configured to be movable up and down in the axial direction, and is arranged in an upper and lower step shape. In the illustrated embodiment, the trays 25 to 29 are attached to a cylindrical shaft 31 that is rotatably fitted to the support shaft 30 at a predetermined interval in the axial direction, and a locking nut 32 that is screwed to the lower end of the support shaft 30. Thus, the trays 25 to 29 are rotatably disposed at the central portions of the deoiling tanks 15 to 19 so as to support the cylindrical shaft 31.

  And, in response to the vertical movement of the support shaft 30, the trays 25 to 29 are moved up and down at the same time, and when it is lifted, the uppermost tray 25 is brought into contact with the lower edge 24 b of the inlet 24 of the supply hopper 23 and sealed. The trays 26 to 29 are close to each other with a slight gap therebetween without contacting the lower end edge 14b of the central opening 14 of the upper deoiling tanks 15 to 18, respectively. Further, when the trays 25 to 29 are lowered, the trays 25 to 28 come into contact with the upper end edge 14 a of the central opening 14 of the deoiling tanks 15 to 18 and are sealed, and the lowermost tray 29 is the upper end edge of the discharge port 21. 21a is abutted and sealed, and rotates together with the rotation of the rotary drum 10.

  Note that each of the trays 25 to 29 may be directly attached to and supported by the support shaft 30.

  Next, the operation of the multistage centrifugal deoiling apparatus having the above configuration will be described with reference to FIGS.

  FIG. 2 shows a state where the support shaft 30 is moved to the upper position and the uppermost tray 25 is in an initial position where it is in contact with the lower end edge 24b of the insertion port 24 and is sealed. A predetermined amount of the workpiece A is accommodated in the tray 25. Next, when the support shaft 30 is moved to the lower position, the trays 25 to 29 are lowered in conjunction with this, and as shown in FIG. 3, the upper edge 14a of the central opening 14 of the deoiling tanks 15 to 18 and the lowermost stage. The opening 14 and the discharge port 21 are sealed by coming into contact with the upper edge 21a of the discharge port 21 of the deoiling tank 19. When the rotating drum 10 starts to rotate in this state, each of the trays 25 to 29 rotates together with the rotating drum 10, and the workpiece A placed on the tray 25 is deoiled by centrifugal force as shown in FIG. When the rotating cylinder 10 increases in rotational force, the workpiece A moves toward the inner peripheral wall of the side wall 11 of the rotating cylinder 10 and moves to the side wall 11. The oil adhering to the workpiece A is removed by centrifugal force in the pressed state. When all the workpieces A accommodated in the tray 25 move to the inner peripheral wall side of the deoiling tank 15 with the rotation of the rotary drum 10 as described above, the support shaft 30 moves upward again as shown in FIGS. To the position, the uppermost tray 25 rises and abuts against the lower end edge 24b of the charging port 24 to stop co-rotation, and closes the charging port 24, and again feeds the next workpiece A through the supply hopper 23. Is put in a predetermined amount and stored in the tray 25. At this time, the other receiving trays 26 to 29 are stopped in contact with the lower end edge 14b of the central opening 14 of the upper deoiling tanks 15 to 18 with a slight gap therebetween. In this state, when the rotation of the rotary drum 10 stops, the centrifugal force declines. Therefore, as shown in FIG. 7, the workpiece A deoiled in the uppermost deoiling tank 15 is on the downward conical slope 13. Is slid by its own weight, falls from the central opening 14 to the second stage tray 26, moves and is accommodated. Subsequently, as shown in FIG. 8, the support shaft 30 is moved to the lower position, and the uppermost tray 25 on which the next workpiece A is loaded is linked to the upper end edge of the central opening 14 of the oil removal tank 15. 14a, the central opening 14 is sealed, and the second stage tray 26 containing the processed product A after the first stage of deoiling treatment is the upper edge of the central opening 14 of the next deoiling tank 16. 14a is contacted and the opening 14 is sealed. In this state, when the rotary drum 10 rotates again, the trays 25 to 29 rotate together with the rotary drum 10 and the workpiece A placed on the trays 25 and 26 is centrifuged as shown in FIG. When the oil is smoothly moved to the outside by sliding on the conical slopes 13 of the oil removal tanks 15 and 16, and the rotating drum 10 further increases the rotating force, the workpiece A moves toward the inner peripheral wall of the side wall 11 of the rotating drum 10. The oil adhering to the workpiece A is removed by centrifugal force while moving and being pressed against the side wall 11. When all the workpieces A accommodated in the trays 25 and 26 move to the inner peripheral wall side of the deoiling tank 15 as the rotary drum 10 rotates, the support shaft 30 is moved as shown in FIGS. The top tray 25 is moved upward again, and the uppermost tray 25 rises to abut against the lower edge 24b of the charging port 24 to stop co-rotation. The charging port 24 is sealed, and the next processing through the supply hopper 23 again. A predetermined amount of the object A is charged and accommodated in the tray 25. At this time, the other receiving trays 26 to 29 are stopped in contact with the lower end edge 14b of the central opening 14 of the upper deoiling tanks 15 to 18 with a slight gap therebetween. In this state, when the rotation of the rotating drum 10 stops, the centrifugal force declines, so that the workpiece A that has been deoiled in the uppermost deoiling tank 15 as shown in FIG. The workpiece A is slid by its own weight, dropped and moved from the central opening 14 to the second stage receiving tray 26, moved, and received, and the workpiece A deoiled in the second stage deoiling tank 16 is conical slope 13. It is slid by its own weight, falls from the central opening 14 to the third stage tray 27, moves and is accommodated. Thereafter, the same operation as described above is repeated, and the workpiece A is moved stepwise from the uppermost deoiling tank 15 to the lowermost deoiling tank 19 to sequentially perform the deoiling process, and the deoiling process is performed in the lowermost deoiling tank 19. The processed workpiece A is discharged to the outside through the discharge port 21.

  Since the deoiling process in each of the deoiling tanks 15 to 19 described above is performed in a state where the upper end of the central opening 14 is sealed with the trays 25 to 29, the workpiece A is removed from each of the deoiling tanks 15 to 19 during the deoiling process. Will not fall unexpectedly. In addition, the movement of the workpiece A from the upper deoiling tank to the lower deoiling tank is performed in a state where the trays 25 to 29 are close to the lower end edge of the central opening of the upper deoiling tank. There is no risk of falling off the trays 25-29.

  The multistage centrifugal deoiling apparatus of the present invention is suitable for deoiling processing of machined parts such as bolts and nuts, particularly cap nuts in which one opening of a screw hole is closed.

It is a schematic block diagram of the multistage centrifugal deoiling apparatus by this invention. It is explanatory drawing of the deoiling process by the multistage centrifugal deoiling apparatus of this invention. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is explanatory drawing of a deoiling process process same as the above. It is a schematic block diagram of the conventional centrifugal deoiling apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotating drum 11 Side wall 12 Partition body 13 Conical slope 14 Central opening part 14a Upper end edge 14b Lower end edge 15-19 Deoiling tank 20 Bottom plate 21 Outlet 21a Upper end edge of the outlet 21 23 Supply hopper 24 Inlet 24b Inlet 24 Lower end edge 25-29 Sampling plate 30 Support shaft 31 Tube shaft 32 Locking nut

Claims (4)

A rotating drum rotating about a central axis extending in the vertical direction, and a funnel-shaped partition wall having a conical inclined surface inclined downward toward the central opening in the rotating drum at predetermined intervals in the axial direction. A multi-stage deoiling tank formed in an up-and-down shape, a saucer disposed in the center of each deoiling tank, and an axially elevating and lowering disposed in the center of the rotary drum, With a support shaft that is rotatably supported by arranging the upper and lower stages,
When the support shaft is raised, each tray is close to the lower end edge of the opening of the upper deoiling tank,
When the support shaft is lowered, each of the trays comes into contact with the upper edge of the opening of the lower deoiling tank and is sealed, and the workpiece accommodated in the tray is rotated by the centrifugal force together with the rotating drum. The multi-stage centrifugal deoiling apparatus is characterized by deoiling by moving to the inner peripheral wall side of each deoiling tank.   When the support shaft is lowered, when each of the trays comes into contact with the upper end of the opening of the lower deoiling tank and is sealed, there is a large step between the peripheral edge of the tray and the upper end of the opening of the lower deoiling tank. The multistage centrifugal deoiling device according to claim 1, which is configured not to occur.   The multistage centrifugal deoiling device according to claim 1 or 2, wherein the multistage tray is attached to a cylindrical shaft rotatably fitted on the support shaft at a predetermined interval in the axial direction.   A supply hopper having an input port is disposed at the upper end opening of the rotating drum, and when the support shaft is raised, the uppermost tray is brought into contact with the lower end edge of the input port and stops rotating, and is supplied through the input port. The multistage centrifugal deoiling device according to claim 1, 2, or 3, wherein a predetermined amount of workpiece to be processed is accommodated in the tray.

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