JPH0375296B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a machine tool, and more specifically to a machine tool that has a chip processing function to prevent chips from adhering to the sliding surface of a feeder of a tool spindle. Regarding machine tools that have.

Conventional technology Machine tools that can feed the tool spindle in the three axes directions of X, Y, and Z are already known, and in recent machine tools, the machining area including the tool spindle is surrounded to prevent chips from scattering. There are things that are. Also, JP-A-59-
Japanese Patent No. 152063 discloses a grinder dust processing device.

Problems to be Solved by the Invention Machine tools process various materials. For example, when machining graphite, etc., the chips turn into powder, and the powder chips adhere to the sliding surface of the machine, causing sliding problems. This caused wear on the moving surfaces, which in turn caused deterioration of machine accuracy. Therefore, when processing graphite or the like, it is necessary to discharge the powder chips from the processing area, and this discharge operation has conventionally been performed manually or by flushing with processing fluid.
If the process is carried out manually, it is difficult to keep the enclosure around the machining area dust-proof, and if machining fluid (cutting oil) is applied, the powdered chips become mud-like and settle, making it extremely difficult to drain them. There was a problem that it caused inconvenience.

Means for Solving the Problems In order to solve the above-mentioned problems, in the present invention, the feeding device and the processing area are partitioned to prevent chips from entering the feeding device, and the work table is A cover means is provided to surround the machining area, and chips generated in the machining area surrounded by the cover means are discharged from the machining area by a suction dust collector and a pneumatic chip recovery device. That is, the fine chips float in the space and are collected by the suction force. Coarse chips fall to the bottom of the processing area and are transported and collected by air pressure. For this purpose, the chip collection device is equipped with a plurality of nozzles arranged along the bottom of the machining area.
The chips that have fallen to the bottom of the machining area are blown away and collected by the air pressure blown out from the plurality of nozzles in order toward the discharge port.

EXAMPLES The present invention will be described in more detail below with reference to the drawings.

1 and 2, reference numeral 1 indicates a base body of a machine tool according to the present invention, and the base body 1 is formed from a base portion 2 that serves as a bed, and a frame upright wall portion 3 rising from the base portion 2 in a box shape. Ru. A transparent openable window 4 of suitable size is formed in the upright wall portion 3. At the top of the base 1 is a vertical tool spindle 6.
A feeding device 7 is arranged to support the base body 1, and a work table 8 is attached to the bottom of the base body 1.

The feeding device 7 consists of means for moving the tool spindle 6 in three axial directions: X, Y, and Z. In order to form an X-axis feeding means, a pair of parallel X
A shaft guide surface 9 is formed on which a carriage 10 is slidably engaged. A Y-axis guide surface 11 for Y-axis feeding is formed on the upper surface of the carriage 10, and a second carriage 12 is slidably engaged therewith. The second carriage 12 has a vertically extending Z
A shaft guide surface 13 is formed on which a spindle head 14 is mounted.
are slidably engaged. Outer cylinder 6' of tool spindle 6
is vertically attached to the spindle head 14 and rotatably supports the tool spindle 6. 15 is a drive motor for the tool spindle. Shuttle 10, 2nd
Motors and feed screws for driving the reciprocating table 12 and the spindle head 14 along their respective guide surfaces are not shown, but they are driven by known methods. Note that the carriage 10 moves in the upper open space of the base 1, and moves to the second carriage 1.
2 moves in the space through which the carriage 11 passes, so that the tool spindle 6 can protrude toward the work table 8 in the aforementioned common space.

The work table 8 is removably attached to the bottom of the base 1. That is, with the work table 8 opened, for example, the window in FIG. 1 and taken out to the outside of the base 1, the work 16 (see FIG.
can be attached and detached, the work table 8 can be placed again in a predetermined position within the base body 1, and the window 4 can be closed. The work table 8 is attached to the center of the bottom of the base 1, and as shown in FIGS. 1 and 4, the work table 8 is raised in the shape of a plateau, forming a passage 17 with depressions on both sides. . Passage on both sides 17
In between, the front and rear portions 18 of the central plateau are mountain-shaped and smoothly slope toward the passages 17 on both sides.

As shown in FIGS. 1 to 3, the carriage 10
A take-up cover guide 19 is attached to the lower edge perpendicular to the X-axis guide surface 9, and the X-axis take-up cover 20
One end of the winding cover guide 19 is fixed to the winding cover guide 19. The other end of the X-axis take-up cover 20 is locked to a take-up shaft 21 arranged inside the base body 1. A biasing force in the winding direction is applied to the winding shaft 21, and when the carriage 10 approaches the winding shaft 21, it winds up the winding cover 20, and conversely, when it moves away from the winding shaft 21, it unwinds the winding cover 20. be able to. Therefore, the X-axis take-up cover 20 extends horizontally through the interior space of the base body 1 excluding the interior space of the carriage 10. The internal space of the take-up cover guide 19 is sealed by a Y-axis take-up cover 22. That is, a guide surface is formed on the inner surface of the take-up cover guide 19 as shown in FIG. 2, and a square wiper 23 is horizontally slidably engaged with the guide surface. The wiper 23 allows the outer cylinder 6' of the tool spindle 6 to slideably protrude, while sealing the vertical movement of the outer cylinder 6'. The wiper 23 has a Y-axis winding cover 2
One end of the Y-axis take-up cover 22 is fixed, and the other end of the Y-axis take-up cover 22 is locked to a take-up shaft 22' similar to the take-up shaft 21 of the X-axis take-up cover 20. In this way, the X-axis take-up cover 20 and the Y-axis take-up cover 22
The wiper 23 forms a horizontal seal member that separates the interior of the base 1 from above and below. Guide surface 9,1
The feed device 7 including 1 and 13 is well sealed from the processing area formed between these sealing members and the work table 8. The processing area other than the work table 8 is surrounded by the base body 1 and the window 4, and thus the processing area is a closed space.

As shown in FIGS. 1 and 2, the work table 8 and seal members (take-up covers 20 and 2
2), a hole 25 is opened at a position above the work table 8 in the processing area formed between the work table 8 and the work table 8. The hole 25 is formed through the vertical wall portion 3 of the base body 1 and communicates with vacuum suction means (not shown). This vacuum suction means includes a dust collector. This vacuum suction means sucks and collects minute floating chips within the machining area, and maintains the inside of the machining area at negative pressure. Therefore, the feeding device 7 is not only sealed by the aforementioned sealing member, but also prevented from entering by chips due to the pressure difference.

Furthermore, a plurality of nozzles 26 are provided at the bottom of the base 1.
An air pipe 27 with an attached is arranged. These nozzles 26 are arranged side by side from one end of the machining area to the other end where the chip collection box 28 is provided, as shown in FIGS. 1 and 2, and supply pressurized air from a pressure air source (not shown). By supplying the chips, the powdery chips that have fallen to the bottom of the base body 1 are blown off and conveyed one after another without being agitated, so that they can be collected in the chip collection box 28. In order to efficiently collect chips, as mentioned above, the work table 8 placed at the raised position 18 is tilted so that the chips are collected by gravity into the sunken passages 17 on both sides. It is advantageous to arrange an air pipe 27 with a nozzle 26. An air pipe may also be arranged at the raised position 18 to convey the chips. still,
In order to blow off and convey the graphite powder chips, it is sufficient to supply air at a relatively low pressure. Furthermore, in order to facilitate the conveyance of chips, it is better not to use cutting fluid.

Effects of the Invention As explained above, according to the present invention, the sealing ability can be enhanced because the chips are sucked in surrounding the machining area, which prevents the chips from adhering to the sliding surface of the feeding device, etc. The durability of the machine can be improved and accuracy can be maintained. Furthermore, the powder chips are blown off and conveyed toward the discharge port in turn without being stirred by the air pressure blown out from multiple nozzles lined up along the bottom of the processing area. Chips that have fallen on the machine are automatically and reliably conveyed to the discharge port.
The chips can be collected well, the chips are not scattered outside the base, and work such as attaching and detaching the work table can be carried out efficiently in a favorable environment.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a machine tool according to the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a top view looking upward from the processing area of FIG. FIG. 3 is a plan view seen from the processing area shown in the figure below. 1... Base body, 6... Tool spindle, 7... Feeding device, 8... Work table, 9, 11, 13...
Guide surface, 14... Spindle head, 20, 22... Winding cover, 23... Wiper, 25... Suction hole, 26... Nozzle, 27... Air pipe.

Claims (1)

[Scope of Claims] 1. A base body, a work table provided on the base body on which a workpiece is placed, a tool spindle with a processing tool attached to its tip and rotatably supported on the spindle head, and the tool spindle. A feed device that performs a relative feed operation with the work table, a tip portion of the tool spindle protruding into the machining area to partition a mechanical device such as the feed device from the machining area, and the tool includes the work table. cover means surrounding the processing area;
A suction dust collection device that sucks floating chips in a machining area surrounded by the cover means, and a plurality of nozzles arranged along the bottom of the machining area, are provided to collect chips that have fallen to the bottom of the machining area. A machine tool equipped with a swarf processing device, characterized in that it is equipped with a swarf recovery device that uses air pressure blown out from the plurality of nozzles to blow off, convey, and collect swarf toward a discharge port in sequence. 2. A machine tool with a chip processing device according to claim 1, wherein the work table is removably provided at the bottom of the base body, and the tool spindle is provided vertically above the work table. . 3. The chip processing device according to claim 1 or 2, characterized in that the feeding device comprises means for moving the tool spindle in three axial directions, X, Y, and Z, which are orthogonal to each other. Machine Tools.