JP2015009281A - Chip processing device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip processing device for a machine tool, which is enabled to improve the cleaning function of a filter and to reduce a replacement frequency by reliably eliminating chips having pierced into the filter.SOLUTION: A chip processing device for a machine tool having a filter body 23 for removing chips from a cutting liquid, comprises: a chip cutting member 75 having a multiplicity of approach holes 75a, into which cut chips a' can enter, for cutting off the cut chips a' having entered the approach holes 75a together with the filter body 23, and arranged movably in the lower face of the filter body 23; and a cutting member drive mechanism 76 for moving the chip cutting member 75 relative to the filter body 23 by the movement of a scraping plate 36.

Description

  The present invention relates to a chip processing apparatus for a machine tool that discharges chips generated by machining a workpiece to the outside of the machine.

  As this type of chip disposal device, for example, Patent Document 1 discloses a purification tank having a contaminant tank into which chips and machining fluid are introduced, and a filter that is disposed in the contaminant tank and removes chips from the cutting fluid. What is provided with the liquid discharge port and the plate-shaped scraper fixed to the chain which orbits the inside of the said pollution liquid tank is disclosed. In this chip disposal apparatus, clogging is prevented by scraping off chips stuck in the filter by moving the scraping plate in contact with the lower surface of the filter.

JP-A-5-31645

  By the way, in the said conventional apparatus, when a long needle-shaped chip, for example, is stuck in the filter, even if the lower surface of the filter is scratched with a scraper, the chip may be bent and cannot be scraped off. As a result, the filter cleaning function by the scraper is lowered, causing clogging, and a problem that the frequency of filter replacement increases.

  The present invention has been made in view of the above-described conventional situation, and it is possible to reliably remove chips stuck in the filter, and to improve the filter cleaning function by the scraper and reduce the replacement frequency. It is an object to provide a chip disposal apparatus.

According to the first aspect of the present invention, there is provided an apparatus housing having a storage tank in which chips and cutting fluid are fallen and stored, a pair of endless drive members that circulate so as to pass through the storage tank, and both the drive members. A chip conveyor having scrapers installed at intervals in the moving direction, for discharging the chips from the storage tank, and a filter tank provided near the liquid level of the storage tank, in which the cutting fluid flows from the lower end opening And a chip processing device of a machine tool provided with a filtration device having a filter body provided at the lower end opening and removing chips from the flowing cutting fluid,
A chip cutting member having a large number of entrance holes through which the chips can enter is movably disposed along the lower surface of the filter body, and the chip cutting member is moved relative to the filter body by the movement of the scraping plate. A cutting member driving mechanism is provided.

A second aspect of the present invention is the machine tool chip disposal apparatus according to the first aspect,
The cutting member driving mechanism includes an arm member supported to be rotatable about a rotation axis provided in the filter tank or the storage tank, and the arm member has an abutting portion that abuts on the chip cutting member. And turning around the turning shaft by the movement of the scraping plate, and relatively moving the chip cutting member along the lower surface of the filter body by the contact portion.

A third aspect of the present invention is the machine tool chip processing apparatus according to the second aspect,
The arm member includes a rear arm member disposed on a rear side in the moving direction of the chip conveyor of the chip cutting member, and a front arm member disposed on a front side in the moving direction, and the rear arm member Moves the chip cutting member to the front side in the moving direction by moving the scraping plate, and the front arm member moves the chip cutting member to the rear side in the moving direction by moving the scraping plate. Yes.

  According to the chip processing apparatus of the first aspect of the present invention, the chip cutting member having the entry hole into which the chip can enter is disposed so as to be movable along the lower surface of the filter body. For example, needle-shaped chips stuck in the main body are pushed out by the relative movement of the chip cutting member with respect to the filter main body. The pressed chips are reliably scraped off by scraping the lower surface of the chip cutting member with a scraper, thereby preventing the filter body from being clogged, improving the filter cleaning function with the scraper and changing the filter frequency. As a result, it is possible to reduce parts costs and work costs associated with maintenance.

  In the present invention, since the cutting member driving mechanism for moving the chip cutting member relative to the filter main body by moving the scraping plate is provided, the chip cutting member can be relatively moved by effectively using the movement of the scraping plate. The drive mechanism is not complicated and large.

  In the invention of claim 2, the cutting member drive mechanism is supported by a rotating shaft provided in a filter tank or a storage tank, and includes an arm member having an abutting portion that abuts on the chip cutting member, Since the arm member is rotated about the rotation axis by the movement of the scraping plate, the abutment portion relatively moves the chip cutting member, so that the chip cutting member can be provided with a simple structure and at low cost. It can be moved relative.

  When the chip cutting member is moved forward by the arm member, the chip cutting member is moved backward by a return spring or the like, for example.

  In invention of Claim 3, the said arm member shall be provided with the back side arm member arrange | positioned by the moving direction rear side of the chip cutting member, and the front side arm member arrange | positioned by the moving direction front side, By moving the scraping plate, the rear arm member moves the chip cutting member to the front side in the moving direction, and the front arm member moves the chip cutting member to the rear side in the moving direction. Thus, the chip cutting member can be moved forward and backward.

1 is an overall perspective view of a machine tool chip processing apparatus according to Embodiment 1 of the present invention. It is a cross-sectional side view of the said chip disposal apparatus. It is a cross-sectional side view of the chip conveyor of the said chip disposal apparatus. It is sectional drawing of the filtration apparatus of the said chip disposal apparatus. It is sectional drawing of the cutting member drive mechanism of the said chip disposal apparatus. It is the perspective view seen from the slanting lower part of the said cutting member drive mechanism. It is a figure which shows the push-off operation | movement of the said cutting member drive mechanism. It is a schematic diagram which shows operation | movement of the said cutting member drive mechanism.

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

  1 to 8 are views for explaining a machine tool for processing a machine tool according to an embodiment of the present invention. In the present embodiment, the terms front and rear, left and right mean front and rear and left and right as viewed from the front of the machine.

  In the figure, reference numeral 1 denotes a horizontal machining center as an example of a machine tool provided with a chip disposal device 2 of this embodiment (see FIG. 2).

  The horizontal machining center 1 is disposed in the center of the bed 1a, a column 1b disposed on the rear side of the bed 1a, a spindle device 1c mounted on the column 1b, as viewed from the front A of the machine. The workpiece W mounted on the machining table 1d is configured to be subjected to a predetermined cutting process by a cutting tool T mounted on the spindle device 1c.

  A recovery recess 1e is formed below the processing table 1d of the bed 1a to recover the chips a generated by cutting the workpiece W and the cutting fluid (coolant) b supplied from the spindle device 1c to the cutting tool T. ing.

  The chip treatment device 2 stores the chips a and the cutting fluid b dropped from the recovery recess 1e, and discharges the chips a to the chip bucket 3 outside the machine while separating and removing the chips a from the cutting fluid b. The liquid b is filtered and supplied to the spindle device 1c in a circulating manner.

The chip treatment device 2 mainly includes an apparatus housing 5 having a storage tank 19 in which the chips a and cutting fluid b are stored in a falling manner, and counterclockwise (in the direction of arrow c) so as to pass through the storage tank 19. A chip conveyor 6 that circulates and a filtration device 7 disposed in the storage tank 19 are provided.

  The apparatus housing 5 includes a primary clean tank 10 and a secondary clean tank 11 disposed so as to surround the rear portion of the storage tank 19 when viewed from the machine front A. The cutting fluid transferred from the storage tank 19 to the primary clean tank 10 is transferred to a cyclone filter (not shown) via a cyclone filter pump 12, and the cyclone filter separates fine particles from the cutting fluid, The cutting fluid from which the chips have been separated is transferred to the bubble removing tank 13 and the bubbles are removed, and then transferred to the secondary clean tank 11, from which the spindle coolant pump 14 supplies the spindle device 1c again. The On the other hand, the cutting fluid transferred to the primary clean tank 10 is supplied to a processing location by a shower pump 15.

  The storage tank 19 is disposed below the recovery recess 1e in the bed 1a, and is formed so that the transfer duct 20 stands rearward and obliquely upward following the rear end of the storage tank 19. . Furthermore, a discharge duct 21 is formed at the upper end of the transport duct 20 so as to bend downward and extend. The tip bucket 3 is disposed below the discharge duct 21.

  The storage tank 19 has a rectangular box shape, a bottom wall portion 19a having a substantially flat surface, a side wall portion 19b erected on the periphery of the bottom wall portion 19a, and an upper end portion of the side wall portion 19b. And an erected top wall 19c. An opening 19d is formed on the front side of the top wall portion 19c, and the recovery recess 1e is connected to the opening 19d.

  The transfer duct 20 has a rear wall portion 20a, a side wall portion 20b, and a front wall portion 20c that extend obliquely upward following the bottom wall portion 19a, the side wall portion 19b, and the top wall portion 19c of the storage tank 19.

  The chip conveyor 6 includes a left and right pair of drive sprockets 33 and 33 disposed at a boundary portion between the transport duct 20 and the discharge duct 21, and a left disposed at a front end in the storage tank 19. A pair of right driven sprockets 34, 34 and left and right endless conveyor chains (drive members) 35 wound around the left and right driven sprockets 34, 34 and left and right drive sprockets 33, 33, respectively. , 35 and a large number of scraping plates 36 that are fixed across the left and right conveyor chains 35, 35 with a predetermined interval in the moving direction c.

  The left and right drive sprockets 33 are rotationally driven by a drive motor 37 (see FIG. 1) via a drive shaft 33a to which the sprockets 33 and 33 are fixed.

  In addition, a limit switch 27 is disposed in the apparatus housing 5 so as to be positioned in the vicinity of the drive sprocket 33. The limit switch 27 is rotated and driven by the scraping plate 36 when the scraping plate 36 passes, and detects the passing timing of the scraping plate 36.

  The left and right conveyor chains 35, 35 are of the S-roller type in which movement in the lateral direction perpendicular to the moving direction c is restricted, and the storage tank 19 and Guided to move along the transport duct 20.

  Each scraper plate 36 is made of sheet metal, and has a scraper body 40 formed in a bucket shape having a substantially L-shaped cross section, and left and right sides fixed to the left and right end surfaces of the scraper body 40. It has a plate part and 41 and 41, and is comprised so that it may have sufficient rigidity to scrape out the chip | tip a which has settled in the bottom part of the storage tank 19. FIG.

  A scraper 50 is attached to each scraper plate 36. The scraper 50 is formed of a thin plate made of spring steel that can be elastically deformed, and is fixed to the scraper plate body 40.

  Each scraper plate 36 is rotatable about rotation shafts 44, 44 disposed on the left and right conveyor chains 35 via support members 43, and the center of gravity G of the conveyor chain 35 is It is supported so that it may be located in the front side of the moving direction c. A belt-like stopper plate 45 is disposed below the support member 43 so as to span the left and right conveyor chains 35 and 35.

  When the scraper plate 36 moves on the upper part of the storage tank 19, the locking portion 41 c of the left and right plate portions 41 abuts against the stopper plate 45 and slides against the guide member 61. The scraper 50 is held in an upward posture D in which the scraper 50 moves while scratching a chip cutting member 75 disposed on the lower surface of the filter body 23 described later of the filtration device 7. The scraper plate 36 is rotated clockwise by a guide member 61 provided at the bottom of the storage tank 19 when moving below the storage tank 19, and the rear plate of the left and right plate parts 41 When the surface portion 41 b comes into contact with the stopper plate 45, the tip end portion 40 a of the scraping plate main body 40 is held in a downward posture E that moves while scratching the bottom wall portion 19 a of the storage tank 19.

  The filtration device 7 is disposed in the vicinity of the liquid surface B at the rear of the storage tank 19, and is provided in a filter tank (filter frame body) 22 into which the cutting fluid flows from the lower end opening 22a, and is detachably attached to the lower end opening 22a. And a filter body 23 for removing chips from the flowing cutting fluid.

  The filter tank 22 has a rectangular box shape and is fixed to the storage tank 19. The lower end opening 22 a is formed in the bottom plate 22 b of the filter tank 22. A seal member 28 for sealing between the filter main body 23 and the filter body 23 is disposed at the peripheral edge of the lower end opening 22a of the bottom plate 22b.

  Further, the left side plate 22c of the filter tank 22 is formed with a communication hole 22d communicating with the primary clean tank 10, and the cutting fluid filtered by the filter body 23 passes through the communication hole 22d for the primary clean. It flows into the tank 10. As a result, the water level of the cutting fluid in the storage tank 19 maintains a predetermined water level B corresponding to the height of the communication hole 22.

  The filter body 23 includes a rectangular frame-shaped frame member 23a that opens upward and downward, and a filter plate 23b that is detachably bolted to the lower surface of the frame member 23a. The filter plate 23b has a large number of fine holes 23c, and the size of the fine holes 23c is set so as to allow only the cutting fluid to pass and prevent the chips from passing.

  A flange portion is formed at the upper end opening edge of the frame member 23a, the front side portion of the flange portion is an engaging portion 23d, and the rear side portion is a handle portion 23e.

  The engaging portion 23d is engaged so that the seal member 28 is sandwiched between engaging pieces 22g that are erected on the front end portion of the bottom plate 22b of the filter tank 22. The grip portion 23e is detachably fixed by a bolt 30 to a bracket 29 attached to the rear end portion of the bottom plate 22b.

  A maintenance opening 22f is formed in the rear plate 22e of the filter tank 22 so that the filter body 23 can be removed. A lid plate 24 that can open and close the maintenance opening 22f is detachably attached to the rear plate 22e by a plurality of bolts 25a.

  The chip processing apparatus 2 according to the present embodiment is configured such that the chip cutting member 75 movably disposed along the lower surface of the filter main body 23 and the chip cutting member 75 are moved to the filter main body 23 by the movement of the scraping plate 36. And a cutting member drive mechanism 76 that is moved relative to each other.

  The chip cutting member 75 has a rectangular thin plate shape, and has a plurality of entry holes 75a (see FIG. 7) into which chips can enter by forming a net or punching holes. It arrange | positions so that the lower surface of the filter board 23b of the main body 23 may be slidably contacted. The entrance hole 75a is set to have a size equal to or larger than the minute hole 23c of the filter plate 23b.

  The chip cutting member 75 is arranged between a push-cut position d on the front side in the moving direction c and a standby position e on the rear side by left and right guide rails 77 and 77 attached to the left and right edges of the filter body 23. And is supported so as to be movable back and forth, and is prevented from moving in the left-right direction perpendicular to the moving direction c.

  When the chip cutting member 75 is located at the standby position e, the entry hole 75a communicates with the fine hole 23c of the filter plate 23b (see FIG. 7A), and when the chip cutting member 75 moves to the push-off position d. The entry hole 75a moves to a position slightly shifted forward with respect to the minute hole 23c (see FIG. 7B).

  A stopper member 85 is formed on the upper surface of the front portion of the chip cutting member 75 (see FIG. 5). When the stopper member 85 is brought into contact with the front wall surface of the frame member 23a of the filter body 23, the chip cutting member 75 is positioned at the standby position e.

  The cutting member drive mechanism 76 includes a rear arm member 80 supported by a rear rotation shaft 79 provided at the rear of the filter tank 22 in the movement direction, and a movement of the filter tank 22. And a front arm member 82 supported by a front rotation shaft 81 provided on the front side of the direction so as to be rotatable about the axis.

  The rear rotation shaft 79 is attached to a rear square tube member 83 fixed to the rear lower surface of the bottom plate 22b of the filter tank 22, and the front rotation shaft 81 is lower than the front lower surface of the bottom plate 22b. It is attached to the front side square tube member 84 fixed to.

  The rear arm member 80 has a generally downward U shape, and has a contact portion 80a that always contacts the rear edge portion 75b of the chip cutting member 75.

  A driven portion 80b is formed on the outer end portion of the rear arm member 80, and a regulating portion 41d formed on the left side plate portion 41 of the scraping plate 36 abuts on the driven portion 80b. The rear arm member 80 rotates counterclockwise in a plan view of FIG. 8A, and the contact portion 80a moves the chip cutting member 75 forward with the rotation.

  The front arm member 82 has a generally downward U-shape, and has a contact portion 82a that always contacts the front edge portion 75c of the chip cutting member 75.

  A driven portion 82b is formed at the outer end portion of the front arm member 82, and a regulating portion 41d formed on the left side plate portion 41 of the scraping plate 36 comes into contact with the driven portion 2b, thereby The front arm member 82 rotates counterclockwise in a plan view of FIG. 8B, and the contact portion 82a moves the chip cutting member 75 rearward along with the rotation.

  The operation of the cutting member driving mechanism 76 will be described in more detail.

When the scraper plate 36 is located behind the filter body 23 in the movement direction, the driven portion 80b of the rear arm member 80 is located behind the rear rotation shaft 79, and the front arm member 82 The driven portion 82b is located at substantially the same longitudinal position as the front rotation shaft 81 (see FIG. 8A).

As the scraper plate 36 moves forward toward the lower side of the filter body 23, the restricting portion 41d of the scraper plate 36 comes into contact with the driven portion 80b of the rear arm member 80 (see arrow f), When the plate 36 moves further forward, the rear arm member 80 rotates counterclockwise about the rear rotation shaft 79, and the contact portion 80a pushes the chip cutting member 75 to the front pushing position d. To move. At this time, the abutting portion 82a of the front arm member 80 is pushed by the chip cutting member 75, so that the front arm member 80 rotates clockwise to the position shown in FIG.

  As the chip cutting member 75 moves forward relative to the filter main body 23, the needle-like or lump-shaped chip a 'that has entered the entry hole 75a of the chip cutting member 75 and stuck in the filter main body 23 is pushed and cut. (See FIGS. 7A and 7B). Specifically, the chip a ′ is sheared by the edge of the fine hole 23 c of the filter body 23 and the edge of the entry hole 75 a of the chip cutting member 75.

  Further, when the scraper 36 moves below the filter body 23, the scraped chip a 'is surely scraped off when the scraper 50 moves while contacting the lower surface of the chip cutting member 75. It becomes.

  When the scraper plate 36 passes below the filter body 23, the restricting portion 41d of the scraper plate 36 comes into contact with the driven portion 82b of the front arm member 82 (see arrow g), and the scraper plate 36 further When moving forward, the front arm member 82 rotates counterclockwise about the front rotation shaft 81, and the contact portion 82a pushes the chip cutting member 75 to move it to the rear standby position e. As the chip cutting member 75 moves to the standby position e, the rear arm member 80 rotates clockwise and returns to the original position shown in FIG.

  Thus, according to the present embodiment, the chip cutting member 75 having the entry hole 75a through which the chip a 'can enter is arranged so as to be movable in the front-rear direction along the lower surface of the filter body 23. The chip-like and lump-like chips a 'which have entered the fine holes 23c of the filter plate 23b and are pushed by the filter plate 23b with the filter plate 23b, so that the chips a' stuck in the filter plate 23b are surely secured. Can be cut and removed.

  Thereby, clogging of the filter main body 23 can be prevented, the filter cleaning function can be improved, and the replacement frequency can be reduced. As a result, the parts cost and work cost associated with maintenance can be reduced.

  In this embodiment, since the cutting member driving mechanism 76 for moving the chip cutting member 75 back and forth with respect to the filter main body by moving the scraping plate 36 is provided, the movement of the scraping plate 36 driven by the conveyor chain 35 is effective. By utilizing this, the chip cutting member 75 can be reciprocated back and forth, and the chips can be reliably cut and removed without causing the drive mechanism to become complicated and large.

  In this embodiment, the cutting member driving mechanism 76 is supported by a rear arm member 80 rotatably supported by a rear rotating shaft 79 provided at the rear of the filter tank 22 in the moving direction, and the filter tank 22. It is assumed that the front arm member 82 is rotatably supported by a front rotation shaft 81 provided at a front portion in the movement direction, and the rear arm member 80 is moved by the scraper plate 36 so that the chip cutting member 75 is moved. Is moved to the front side in the moving direction, and the front arm member 82 moves the chip cutting member 75 to the rear side in the moving direction. That is, the chip cutting member 75 is moved to the pushing position d when the rear arm member 80 is rotated, and the chip cutting member 75 is returned to the original standby position e when the front arm member 82 is rotated. Therefore, the chip cutting member 75 can be reliably moved back and forth with a simple structure and at a low cost.

  Here, the scraper having the restricting portion 41d and the scraper not having the restricting portion may be alternately arranged, for example. In this case, when the scraper having the restricting portion moves below the filter body, the chip cutting member is moved back and forth as described above to push out the chips. On the other hand, when the scraper without the restricting portion moves below the filter body, the chip cutting member does not move, so that the scraper 50 is in a state where the entry hole of the chip cutting member and the fine hole of the filter body coincide with each other. The chips are scraped off by moving in contact with the lower surface of the chip cutting member 75. As a result, cutting scraping of chips and scraping without cutting are alternately performed, so it is possible to remove the chips more reliably by scraping off the chips that are lightly attached to the filter body 23 as they are, It becomes possible to prevent clogging of the filter even more reliably.

In addition, although the said embodiment demonstrated the case where the rear side arm member 80 which moves the said chip cutting member 75 forward, and the front side arm member 82 which moves backward were provided, in this invention, it is forward with one arm member. Alternatively, one of the rearward movements may be performed, and the other movement may be performed by a return spring or the like, or both arm movements may be performed by one arm member.

DESCRIPTION OF SYMBOLS 1 Machine tool 2 Chip disposal apparatus 5 Apparatus housing 6 Chip conveyor 7 Filtration apparatus 19 Storage tank 22 Filter tank 22a Lower end opening 23 Filter main body 35 Conveyor chain (drive member)
36 scraper 75 chip cutting member 75a entry hole 76 cutting member drive mechanism 79 rear rotation shaft 80 rear arm member 80a contact portion 81 front rotation shaft 82 front arm member 82a contact portion a 'chip b cutting fluid c Direction of movement

Claims (3)

An apparatus housing having a storage tank in which chips and cutting fluid are stored in a falling manner;
A chip that has a pair of endless drive members that circulate so as to pass through the storage tank, and a scraper that is installed between the drive members so as to be spaced apart in the movement direction, and discharges the chips from the storage tank. A conveyor,
A filter tank provided near the liquid surface of the storage tank, the cutting fluid flowing in from a lower end opening, and a filter device provided in the lower end opening, and having a filter main body for removing chips from the flowing cutting fluid. In machine tool chip disposal equipment,
A chip cutting member having a large number of entrance holes through which the chips can enter is disposed so as to be movable along the lower surface of the filter body,
A chip processing apparatus for a machine tool, comprising a cutting member driving mechanism for moving the chip cutting member relative to the filter body by moving the scraping plate. In the machine tool chip disposal apparatus according to claim 1,
The cutting member driving mechanism includes an arm member supported to be rotatable around a rotation axis provided in the filter tank or the storage tank,
The arm member has an abutting portion that abuts on the chip cutting member. The arm member rotates about the rotation axis by the movement of the scraping plate, and the chip cutting member is moved to the filter main body by the abutting portion. A chip processing apparatus for a machine tool, characterized by being relatively moved along a lower surface. In the machine tool chip disposal apparatus according to claim 2,
The arm member includes a rear arm member disposed on the chip cutting member on the rear side in the moving direction of the chip conveyor, and a front arm member disposed on the front side in the moving direction,
The rear arm member moves the chip cutting member to the front side in the moving direction by moving the scraping plate, and the front arm member moves the chip cutting member to the rear side in the moving direction by moving the scraping plate. A chip processing device for a machine tool, characterized in that:

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