JP2009078307A - Polishing work table device with powder dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing work table device with a powder dust collector for collecting powder dust produced during dry polishing/grinding work without scattering it therearound. <P>SOLUTION: On a roller table type working bench 21, there are provided a powder dust collecting hopper 22, a first blower 23, a bug filter device 24, and a second blower 25. An upper end large opening portion 22a having a punching plate 22c of the powder dust hopper 22 is opposed to the lower face of the working bench 21, and the discharge port of the first blower 23 communicated with a small opening portion of the powder dust collecting hopper 22 is communicated with the suction port of the second blower 25 via the bug filter device 24. The suction pressure of the second blower 25 is set to be greater than the suction pressure of the first blower 23 so that the dust trapping function of the bug filter effectively works. Thus, the rated suction of the first blower 23 is effectively held, and flattened strong suction force is operated on the whole region of the upper end large opening portion 22a of the powder dust collecting hopper 22 by the punching plate 22c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a polishing work table device with a dust recovery device for placing a work that requires dry polishing / grinding work and performing dry polishing / grinding work on the upper surface and side surface of the work with a polishing / grinding tool.

  FIG. 3 shows a schematic front view of a conventional polishing work table apparatus with a dust recovery apparatus that has been conventionally used (no patent publication). This polishing work table device 10 mounts a work (for example, an aluminum die-cast product having burrs) W that requires dry polishing / grinding work, and drys the upper surface of the work W by an air motor driven polishing / grinding tool T. A roller table type work table 11 for performing polishing / grinding work (for example, deburring work), a dust tray 12 that is provided on the lower surface of the work table 11 and receives dust falling through a gap between the rollers, and under the work table 11 A pair of opposing dust suction port bifurcated hoppers 13 which are bifurcated on the side and are arranged with the dust suction port 13a facing the table side, and a dust collecting device (bag-like filter) communicated with the outlet of each hopper 13 + Fan) 14.

  According to this polishing work table device 10, when the dust recovery device 14 is operated and the upper surface of the workpiece W is dry-polished / ground by the air motor-driven polishing / grinding tool T, the dust discharged by polishing / grinding Are sucked by the hoppers 13 for hopper dust suction ports on both sides and collected by a dust collecting filter device (not shown), and the dust falling in the gap between the rollers of the work table 11 is received by the dust tray 12 and collected. Is.

  On the other hand, Patent Document 1 discloses that dust is collected by sucking air on the upper surface of the table from the lower side of the table of the working table device.

  In addition, it has been possible to automate the peeling, surface processing, and other operations of coatings on automobile parts, home appliance parts, etc., and release workers from dirt caused by dust, etc., and greatly improve work efficiency and accuracy. A blasting device shown in Patent Document 2 has been proposed.

JP-A-11-156321 JP 2001-179637 A

  However, according to the polishing work table device 10 shown in FIG. 3, when the working position of the tool T is close to any of the dust suction ports 13a, the dust is sucked into the hopper 13, but the dust suction port. The suction force of 13a suddenly weakens slightly away from the mouthpiece. In addition, since the tool T employs an air motor as a driving source, dust is scattered by the high-pressure air discharged from the tool T. For this reason, most of the dust cannot be sucked, the dust spreads around the workbench 11 and is scattered, and the work space becomes dusty. Therefore, even if the worker wears protective glasses and a protective mask, the working environment for the worker is extremely poor, and it is necessary to improve the tightness.

  The blasting device shown in Patent Document 2 collects blast and dust together, then separates the blast and dust, and reuses the blast. Table device for polishing operation with dust recovery device of FIG. It cannot be applied to.

  The present invention has been devised in view of the above points, and dust recovery that can recover dust generated by dry polishing / grinding operations performed on a roller table type workbench through a gap between rollers without being scattered around. An object of the present invention is to provide a polishing work table device with a device.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a roller table for placing a work that requires dry polishing / grinding work and performing dry polishing / grinding work on the upper surface of the work with a polishing / grinding tool. A working table, a dust collection hopper having a large opening at the upper end, a punching plate at the large opening at the upper end, and the large opening at the top facing the lower surface of the work table; and a suction port for the dust collection hopper The filter blower inlet is aligned with the first blower communicated with the small opening, the box chamber, the partition panel that divides the box chamber into the upstream space and the downstream space, and the opening provided in the partition panel. And a bag filter accommodated in the upstream space and communicated with the upstream space and opened to the wall of the chamber. A bag filter device in communication with the discharge port, and a second blower in communication with the downstream space of the bag filter device and a blower suction port in communication with the filtered air suction port opened in the chamber wall surface, A polishing work table device with a dust recovery device in which the suction pressure of the second blower is set larger than the discharge pressure of the first blower is provided.

  According to this configuration, when the first blower and the second blower are operated, the suction pressure of the second blower is set to be larger than the discharge pressure of the first blower. While effectively working, the rated suction by the first blower is effectively maintained. For this reason, a strong suction force that is flattened over the entire area of the large opening at the upper end of the dust collection hopper acts by the punching plate. Accordingly, the dust generated by the dry polishing / grinding operation is sucked into the dust collecting hopper through the gap between the rollers by the suction of the first blower, and further the suction pressure of the second blower and the discharge of the first blower are discharged. It flows into the bag filter device by the joint action with the pressure and is captured by the bag filter. The air passes through the bag filter and is discharged by the second blower.

  According to the present invention, in addition to the configuration described in claim 1, when the operation of the first blower and the second blower is stopped, the dust removing air is blown from the upstream space of the bag filter device through the filter suction port. The backflow air blowing means is preferably provided in the upstream space of the bag filter device. The dust recovery hopper has a chamber whose upper half is large corresponding to the roller table work table and whose lower half is biased to one side and is approximately half the size of the upper half. In addition, it is preferable to provide a recovery port for recovering dust having a large particle diameter that drops and accumulates at the bottom of the chamber. Furthermore, a configuration in which the second blower is driven by an inverter is preferable. Furthermore, it is preferable that the roller table type workbench is configured to have a gravity drop conveyance function with a placement surface inclined.

  According to the first aspect of the present invention, since the suction pressure of the second blower is set larger than the discharge pressure of the first blower, the dust collection function of the bag filter works effectively, and the first blower The rated suction by the blower is effectively maintained, and the punching plate applies a flattened suction force to the entire area of the large opening at the upper end of the dust collection hopper. can get. For this reason, the dust generated by the dry polishing / grinding operation performed on the roller table work table can be taken into the dust collection hopper through the gap between the rollers without being scattered around and can be captured by the bag filter.

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

[Embodiment 1]
1 is a schematic plan view of a roller table type work table of a polishing work table device with a dust recovery device according to Embodiment 1. FIG. FIG. 2 is a schematic overall front view of the polishing work table device with the dust recovery device of FIG.

  First, the configuration will be described. As shown in FIG. 2, the polishing work table device 20 with the dust collection device of the first embodiment includes a roller table type work table (hereinafter simply referred to as a work table) 21, a dust collection hopper 22, A blower 23, a bag filter device 24, and a second blower 25 are provided. In this polishing work table device 20 with a dust recovery device, a work W is placed on a work table 21, an operator grips the polishing / grinding tool T, and the polishing / grinding tool T is used to dry the upper surface of the work W. Polishing / grinding work can be performed, and dust generated at that time is sucked together by the first blower 23 and the second blower 25 and collected by the bag filter device 24, and the dust floats in the work space. It is the structure which cancels.

  The target workpiece W is an article that needs to be polished, for example, an aluminum die-cast article or cast iron article that generates burrs. In this embodiment, a floor panel made of aluminum die cast that constitutes a free access floor is targeted. This work (floor panel) W has, for example, an upper surface portion, a double peripheral wall portion, and a rib wall portion, and is generated on the upper surface and side surfaces after the lower surface of the double peripheral wall portion is flattened by machining. It is necessary to remove the burrs and clean the surface lightly so as not to remove the background when die cutting. FIG. 1 shows a dry polishing / grinding operation performed on the upper surface of the workpiece (floor panel) W. As the polishing / grinding tool T, for example, a lightweight disk-type tool using an air motor as a rotational drive means is preferably used, but is not limited thereto. A motor driven polishing / grinding tool may be used. The polishing / grinding tool T is not a component of the present invention.

The work table 21 has a structure in which a plurality of rollers 21a, 21a, 21a,... Are supported on both ends by a frame 21b so that a gap for dropping dust of several millimeters is opened and arranged on one plane so as to be free to rotate. The work table 21 is installed with an inclined conveying placement surface and has a gravity drop conveying function, and includes a guide 26, a direct acting electromagnetic actuator 27, and a stopper 28.
The guide 26 is supported on one side of the upper surface of the frame 21b and protrudes from the upper surface of the table. The guide 26 engages with the side surface of the workpiece W conveyed by gravity drop and guides the workpiece W so as to be positioned at the center of the table width. When the switch 27 attached to one side of the frame 21b is turned ON, the actuator 27 is extended, and a thin plate-like stopper 28 supported by the expansion / contraction rod of the actuator 27 is raised from between the rollers to the upper surface of the table. The stopper 28 is configured to lock the side edge on the lower side in the inclination direction of the workpiece W guided by the guide 26.
In FIG. 2, a part of another roller conveyor 40 is shown adjacent to the downstream side of the work table 21 in the inclination direction. The work W is supplied onto the work table 21 by handling by an industrial robot or by a conveyor installed on the upstream side of the line.

  The dust collection hopper 22 has a large opening at the upper end, and is provided with a punching plate 22 c at the upper opening 22 a so that the upper opening 22 a faces the lower surface of the work table 21. The dust collection hopper 22 has a large opening at the upper end of the pyramid portion 22b in the upper half corresponding to the work table 21, and the chamber portion 22d in the lower half is biased to one side so that it is almost in the upper half. It is half the size, has a small opening outlet 22e on one side surface of the chamber portion 22d, and collects dust with a large particle diameter that accumulates by dropping on the bottom of the chamber portion 22d on the other side surface. A dust collection port 22f is provided and closed with a lid 22g. The punching plate 22c has a function of making air suction uniform, and the chamber portion 22d has a function of separating and collecting large particles (polishing waste) that fall by gravity without being sucked by the first blower 23. The dust collection hopper 22 has a pyramid shape with a large upper portion and a small lower portion, and the chamber portion 22d is inclined to one side. With this, the dust collection hopper 22 and the first blower 23 are disposed below the work table 21. Can be installed.

  The first blower 23 communicates a suction port with a small opening outlet 22 e of the dust collection hopper 22.

  The bag filter device 24 includes a housing 24a, a partition panel 24b, and a bag filter 24c. The housing 24a is a vertically long rectangular parallelepiped. The partition panel 24b divides the housing 24a into a downstream space (upper space) with a small volume and an upstream space (lower space) with a large volume. A plurality of filter inlets are opened in the partition panel 24b, and an opening end of the bag filter 24c is fixed to each filter inlet, and the bag filter 24c is upstream from the state in which the bag filter 24c is suspended from the partition panel 24b. It is accommodated in the side space (lower space). The casing 24a has an inspection port that opens one side of the upstream space (lower space), and includes an inspection lid 24d that seals the inspection port, and also has a downstream space (upper space). There is an inspection opening that opens widely, and an inspection lid 24e that seals the inspection opening is provided. The dust collected and attached to the bag filter 24c and collected can be dropped away from the bag filter 24c by sending back air to the bag filter 24c, and the collected dust is received by the collecting tray 24g. Yes. The collection tray 24g can be taken out by opening the inspection lid 24d. The inspection lid 24e is opened and closed during inspection / replacement of the bag filter 24c and cleaning of the downstream space (upper space).

  The casing 24a has a dust inlet 24f at the lower portion of the side surface at an appropriate level corresponding to the upstream space (lower space), and the dust inlet 24f and the discharge port of the first blower 23 communicate with each other. It is connected and communicated through a duct 29. Further, a filtered air suction port 24h is opened on the upper surface of the casing 24a, and the suction port of the second blower 25 is connected to and communicated with the filtered air suction port 24h. Therefore, in the bag filter device 24, the upstream space (lower space) communicates with the discharge port of the first blower 23, and the downstream space (upper space) communicates with the discharge port of the second blower 25. is doing. The suction pressure of the second blower 25 is set larger than the discharge pressure of the first blower 23 so that the dust collection function of the bag filter 24c is maintained.

Further, the bag filter device 24 is provided with backflow air blowing means 30 for blowing dust dust into the bag filter 24c. The backflow air blowing means 30 includes a third blower 30a and a backflow air blowing pipe 30b. The backflow air blowing pipe 30b coincides with and faces the filter suction opening in which the blowing opening is opened in the partition panel 24b.
The backflow air blowing means 30 operates the third blower 30a when the operation of the first blower 23 and the second blower 25 is stopped. It is the structure which can blow in dust dust air in.

  An exhaust duct 31 is connected to the air discharge port of the second blower 25, and the dust-removed air is discharged from the appropriate discharge position through the exhaust duct 31. The second blower 25 is configured to be driven by an inverter.

  Next, the operation will be described. The first blower 23 and the second blower 25 are operated, the work W is supplied onto the work table 21, and the upper surface of the work W is dry-polished / ground by the polishing / grinding tool T. When the first blower 23 and the second blower 25 are operated, the suction pressure of the second blower 25 is set larger than the discharge pressure of the first blower 23, so the dust collection function of the bag filter 24c is effective. The rated suction by the first blower 23 is effectively maintained. The punching plate 22c in the upper end large opening of the dust collection hopper 22 functions to flatten the suction force so that substantially uniform suction is performed in the entire upper end large opening. The dust generated by the dry polishing / grinding operation is sucked into the dust collecting hopper 22 through the gap between the rollers, and is sucked and discharged together with air by the first blower 23, and is connected to the bag filter 24c through the communication duct 29. The air flows into the upstream space, is captured by the bag filter 24c, passes through the bag filter 24c, and is sucked and discharged by the second blower 25. When the bag filter 24c becomes clogged, the operation of the first blower 23 and the second blower 25 is stopped, the third blower 30a is operated, the backflow air is sent to the bag filter 24c, and the bag filter 24c is supplied. The collected dust can be dropped, and the collection tray 24g can be taken out and collected.

  According to the above-described embodiment, when the first blower 23 and the second blower 25 are operated, the suction pressure of the second blower 25 is set larger than the discharge pressure of the first blower 23. The dust collection function of the bag filter 24c works effectively, and the rated suction by the first blower 23 is effectively maintained. For this reason, a strong suction force that is flattened acts on the entire area of the large opening 22a at the upper end of the dust collection hopper 22 by the punching plate 22c. Thereby, the dust generated by the dry polishing / grinding operation performed on the work table 21 can be taken into the dust collection hopper 22 through the gap between the rollers without being scattered around and captured by the bag filter 24c.

  According to the above-described embodiment, when the operation of the first blower 23 and the second blower 25 is stopped, the backflow air blowing that blows dust dust through the filter suction port from the upstream space of the bag filter 24c device. Since the means is provided in the upstream space of the bag filter 24c device, when the bag filter 24c is clogged, the operation of the first blower 23 and the second blower 25 is stopped, and the backflow air blowing means is provided. Is operated to feed backflow air into the bag filter 24c, and the dust collected by the bag filter 24c is dropped and collected.

  According to the above-described embodiment, the dust collection hopper 22 has a chamber whose upper half is large corresponding to the work table 21 and whose lower half is biased to one side and is approximately half the size of the upper half. In addition, since the chamber is provided with a recovery port for recovering dust having a large particle diameter that drops and collects at the bottom of the chamber, the first blower 23 is prevented from hitting particles having a large gravitational action, This contributes to the maintenance of the quietest working environment as much as possible by suppressing the noise of the can and avoiding damage to the wings of the blower.

  According to the above-described embodiment, the second blower 25 is driven by the inverter and the suction pressure of the second blower 25 is variable, so that the suction pressure of the second blower 25 and the discharge of the first blower 23 are changed. Since the pressure differential pressure can be variably set, for example, even when the area of 80% of the bag filter 24c is trapped and clogged with dust, it can be set so that effective suction is performed from the hole of the punching plate 22c.

  According to the above-described embodiment, the work table 21 is installed with an inclined mounting surface and has a gravity drop conveyance function. Can be embedded.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, but includes variously modified forms within the technical scope without departing from the gist of the invention described in the claims. The dust collection hopper 22 may be provided separately in the pyramid portion 22b and the chamber portion 22d. Furthermore, the size, arrangement, and distribution of the holes of the punching plate 22c may be appropriate as long as there are a plurality of dust collection hoppers 22. The second blower 25 is not limited to being driven by an inverter.
A dust recovery hopper having a large opening at the upper end, a punching plate at the large opening at the upper end, and the large opening at the upper end facing the lower surface of the work table;

1 is a schematic plan view of a work table of a polishing work table device with a dust collection device according to Embodiment 1. FIG. It is a whole front view of the outline of the table apparatus for grinding | polishing operation | work with a dust collection device of FIG. It is a schematic front view of the table apparatus for grinding | polishing work with a conventional dust collection | recovery apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Table apparatus for grinding | polishing work with dust collection apparatus 21 Roller table type work table 22 Dust collection hopper 22a Upper end large opening part 22b Pyramid part 22c Punching plate 22d Chamber part 22e Outlet 22f Dust collection port 23 First blower 24 Bag filter apparatus 24b Partition panel 24c Bag filter 24e Dust inlet 25 Second blower 30 Backflow air blowing means

Claims (5)

A roller table work table for placing a work requiring dry polishing / grinding work and performing a dry polishing / grinding work on the upper surface of the work with a polishing / grinding tool;
A dust recovery hopper having a large opening at the upper end, a punching plate at the large opening at the upper end, and the large opening at the upper end facing the lower surface of the work table;
A first blower having a suction port communicated with a small opening of the dust collection hopper;
A box chamber, a partition panel that divides the inside of the box chamber into an upstream space and a downstream space, and a bag filter that is attached to the opening provided in the partition panel with the filter suction port aligned and accommodated in the upstream space A bag filter device in which a dust inlet of a box chamber communicated with an upstream space and opened in a chamber wall surface is communicated with a discharge port of the first blower;
A second blower that communicates with a downstream space of the bag filter device and communicates with a blower suction port to a filtered air suction port that is opened in a chamber wall surface;
The suction pressure of the second blower is set larger than the discharge pressure of the first blower,
A polishing work table device with a dust recovery device. When the first blower and the second blower are stopped, air blowing means for blowing dust removal air from the upstream space of the bag filter device through the filter suction port is provided on the upstream space of the bag filter device. Prepared in,
The polishing work table device with a dust recovery device according to claim 1. The dust collection hopper has a large upper half corresponding to the roller table work table, a lower half is biased to one side and is a chamber approximately half the size of the upper half, Equipped with a recovery port for recovering dust having a large particle diameter that drops and collects at the bottom of the chamber;
A polishing work table device with a dust recovery device according to claim 1 or 2. The second blower is driven by an inverter.
The polishing work table device with a dust recovery device according to any one of claims 1 to 3. The roller table type workbench is installed with an inclined mounting surface and has a gravity drop conveyance function,
The polishing work table device with a dust recovery device according to any one of claims 1 to 4.

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