JP4003207B2 - Chip suction device for machine tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for sucking chips cut off from a workpiece by a tool in a machine tool including a turning tool such as a machining center.
[0002]
[Prior art]
As this type of chip suction device, conventionally, a chip suction pipe provided in the vicinity of the main shaft and having a suction port directed in the same direction as the tip surface of the main shaft, and the main shaft with respect to the tool around the tool. A suction cover provided to rotate around the axis and forming a chip suction space between the tool and the tool. When the tool is attached to the spindle, the suction of the chip suction pipe is provided. A device in which a connection port connected to the port is formed is known. The suction port of the chip suction pipe needs to be opened when the tool is attached to the main shaft and closed when the tool is removed from the main shaft. Therefore, in the conventional apparatus, the suction port of the chip suction pipe is opened and closed by a cap that is detachably attached to the end of the chip suction pipe, and the cap is attached to and detached from the chip suction pipe. Is performed manually by the operator.
[0003]
[Problems to be solved by the invention]
However, in the conventional apparatus, it is necessary to attach and detach the cap to and from the dust suction pipe by the operator's manual work separately from the attachment and detachment of the tool to and from the main shaft, which is troublesome.
[0004]
An object of the present invention is to solve the above-mentioned problems and to provide a chip suction device in a machine tool that can automatically open and close a suction port of a chip suction pipe by attaching / detaching a tool to / from a main shaft.
[0005]
[Means for Solving the Problems and Effects of the Invention]
A chip suction device in a machine tool according to a first aspect of the present invention includes a chip suction pipe provided in the vicinity of the main shaft and having a suction port directed in the same direction as the tip surface of the main shaft, and a tool around the tool. A suction cover is provided to rotate around the spindle axis and forms a chip suction space between the tool and the tool, and chip suction when the tool is attached to the spindle. A chip suction device in a machine tool having a connection port connected to a suction port of a tube, wherein the chip suction tube is provided with a lid for closing the suction port so that the suction port can be opened and closed. Between the cover and the cover, there is provided a lid opening / closing means for opening the lid when attaching the tool to the spindle and closing the lid when removing the tool from the spindle, and the lid is attached to a support member provided outside the suction pipe. Oscillates around an axis parallel to the spindle axis Mounted on standing, the lid closing means comprises a spring for urging the lid in the closing direction, when mounting the tool to the spindle, and a cam device for opening the lid against the biasing force of the spring, said cam device An end face cam provided on the suction cover and having a contour along the end face of the cylinder centering on the pivot center axis of the lid, and a cam follower provided on the lid at a position deviated from the pivot center axis. When attached to the main shaft, the cam follower moves around the pivot center axis of the lid so that the lid is opened .
[0006]
According to the chip suction device in the machine tool of the first aspect of the present invention, the chip suction pipe is provided with a lid for closing the suction port so as to be openable and closable, and the tool is interposed between the chip suction pipe and the suction cover. There is a lid opening / closing means that opens the lid when attaching to the spindle and closes the lid when removing the tool from the spindle, so that when the tool is attached to or detached from the spindle, the lid is automatically opened and closed by the lid opening / closing means. It is done. Therefore, the suction port of the chip suction tube can be automatically opened and closed by the operation of attaching and detaching the main shaft.
[0007]
The cam device is provided on the suction cover and has an end surface cam having a contour along the end surface of the cylinder centering on the swing center axis of the lid, and a cam follower provided on the lid at a position deviated from the swing center axis. Thus, when the tool is attached to the main shaft, the cam follower moves around the pivot center axis of the lid, and the lid is thereby opened, so that the configuration becomes relatively simple.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
FIG. 1 shows a chip suction device before the tool is attached to the spindle, FIG. 2 shows the chip suction device after the tool is attached to the spindle, and FIGS. 3 to 6 show each part of the chip suction device. . In the following description, the top and bottom and the left and right in FIG.
[0010]
In FIG. 1 and FIG. 2, the chip suction device is arranged to the right of the main shaft (1) so that the lower part is parallel to the main shaft (1) and does not rotate around the main shaft (1) axis. Suction cover provided around the spindle (1) axis relative to the tool (3) around the tool body (4) of the chip suction pipe (2) and the tool (3) (5).
[0011]
The lower end opening of the chip suction pipe (2) faces downward similarly to the lower end surface of the main shaft (1), and the lower end opening serves as a suction port (2a). Although not shown, the chip suction pipe (2) is connected to the suction means via an appropriately piped conduit. The suction cover (5) has a connection port (5a) that is connected in the state of being inserted into the suction port (2a) of the chip suction tube (2) when the tool (3) is attached to the spindle (1). Has been. The lower end of the suction cover (5) is at a height position above the tip of the blade (4a) of the tool body (4) by a distance slightly larger than the cutting depth. In addition, there is a gap between the peripheral wall (5b) of the suction cover (5) and the blade (4a) of the tool body (4) in order to avoid such interference and secure a sealing property that can maintain the suction force. Thus, an annular chip suction space (6) is formed between the peripheral wall (5b) of the suction cover (5) and the tool body (4). The chip suction space (6) communicates with the connection port (5a).
[0012]
The chip suction pipe (2) is provided with a plate-like lid (7) for closing the suction port (2a) so as to be opened and closed as follows. As shown in FIG. 3 and FIG. 4, a bracket (8) (support member) protruding rightward is fixed to the outer peripheral surface of the lower end of the chip for sucking powder (2). The upper end of the pin (9) extending in the direction parallel to the axis of the main shaft (1) is rotatably supported. A bottomed cylindrical body (11) having an upper end opened and a lower end closed and surrounding the pin (9) is fixed to the lower surface of the bracket (8). The lower end of the pin (9) extends through the lower end closing wall (11a) of the cylindrical body (11) so as to freely rotate. The lid (7) is integrally formed with a protrusion (7a) that protrudes to the right when the suction port (2a) is closed, and a short cylindrical portion (12) is formed on the upper surface of the protrusion (7a). Protruding and fixed. Then, a portion of the pin (9) that protrudes downward from the lower end closing wall (11a) is fixed to the short cylindrical portion (12), whereby the lid (7) has an axis parallel to the axis of the main shaft (1). It can swing around. A torsion coil spring (13) (biasing means) is arranged around the pin (9), and the upper end of the torsion coil spring (13) is present in the cylindrical body (11) of the pin (9). The lower end portion is engaged with the lower end closing wall (11a) of the cylindrical body (11). Then, the pin (9) and the lid (7) are urged counterclockwise in FIG. 4 by the torsion coil spring (13), whereby the suction port of the chip suction pipe (2) by the lid (7). (2a) is now closed. The lid (7) is provided with a stopper (7b) that engages with the lower end of the chip suction pipe (2) and stops the lid (7) in a closed position that closes the suction port (2a). .
[0013]
When attaching the tool (3) to the spindle (1) between the lid (7) and the suction cover (5) of the tool body (4), open the lid (7) and remove the tool (3) from the spindle (1). A cam device is provided for closing the lid (7) when it is removed from the camera. As shown in FIGS. 1 to 6, the cam device is provided on the suction cover (5) and has an end face cam (15a) along the end face of the substantially semicircular partial cylinder (14) as viewed from above. 15) and a cam follower (16) provided on the short cylindrical portion (12) of the lid (7) so as to be rotatable around an axis orthogonal to the axis of the main shaft (1). The end cam (15) is provided so as to project upward in a right projecting plate-like portion (17) integrally formed around the connection port (5a) in the suction cover (5). When the tool (3) is attached to the main shaft (1), the cam follower (16) first comes into contact with the upper end of the contour (15a) of the end face cam (15), and then along this contour (15a). By rolling, the cover 7 moves in the clockwise direction in FIG. 4 around the pivot axis of the lid (7). As a result, the lid (7) swings clockwise in FIG. 4, and the suction port (2a) of the chip suction pipe (2) is opened.
[0014]
In the chip suction device having such a configuration, the lid (7) swings counterclockwise in FIG. 4 by the action of the torsion coil spring (13) before the tool (3) is attached to the main shaft (1). The suction port (2a) of the chip suction pipe (2) is closed by the lid (7).
[0015]
When attaching the tool (3) to the main shaft (1), when the main shaft (1) and the tool (3) axis are aligned, the cam follower (16) is first moved into the end face cam (16). When the cam follower (16) rolls along the contour (15a) of the end face cam (15) when they come into contact with the upper end of the contour (15a) of (15) and further approach each other, the cam follower (16) 4) Moves in the clockwise direction in FIG. As a result, the lid (7) swings clockwise in FIG. 4 (in the direction of arrow A in FIG. 6) against the biasing force of the torsion coil spring (13), and the suction port of the chip suction pipe (2). (2a) is opened. Next, the connection port (5a) of the suction cover (5) is connected to the suction port (2a), and the tool (3) is attached to the main shaft (1). Chips scraped from the workpiece by the blade (4a) of the tool body (4) of the tool (3) are sucked into the chip suction space (6) of the suction cover (5), and the connection port (5a) and It enters the suction pipe (2) through the suction port (2a) and is removed by suction.
[0016]
When removing the tool (3) from the spindle (1), if the connection port (5a) of the suction cover (5) is pulled out of the suction port (2a), the lid (7) will be attached to the torsion coil spring (13). It swings counterclockwise in FIG. 4 by the force, and the suction port (2a) of the chip suction pipe (2) is closed by the lid (7).
[Brief description of the drawings]
FIG. 1 is a front view showing a chip suction device before a tool is attached to a main shaft.
FIG. 2 is a front view showing the chip suction device after the tool is attached to the main shaft.
FIG. 3 is a partially enlarged cross-sectional view of FIG. 1;
4 is a view taken along the line IV-IV in FIG.
FIG. 5 is a view taken along the line VV in FIG. 1;
FIG. 6 is a perspective view showing the operation of the cam device.
[Explanation of symbols]
(1): Spindle
(2): Chip suction pipe
(2a): Suction port
(3): Tool
(5): Suction cover
(5a): Connection port
(6): Chip suction space
(7): Lid
(8): Bracket (support member)
(13): Torsion coil spring
(14): Partial cylinder
(15): End face cam
(15a): Contour
(16): Cam follower

Claims (1)

A chip suction pipe provided in the vicinity of the main shaft and having a suction port oriented in the same direction as the front end surface of the main shaft, and provided around the tool so as to rotate about the main shaft axis with respect to the tool. And a suction cover that forms a space for suctioning chips, and a connection port that is connected to the suction port of the chip suction pipe when the tool is attached to the spindle. A chip suction device in a machine,
The chip suction pipe is provided with a lid that closes the suction port so that it can be opened and closed. The lid is opened between the chip suction pipe and the suction cover when the tool is attached to the spindle, and the lid is removed when the tool is removed from the spindle. A lid opening / closing means is provided for closing the lid, and the lid is attached to a support member provided outside the suction pipe so as to be swingable around an axis parallel to the main axis, and the lid opening / closing means closes the lid. And a cam device that opens the lid against the biasing force of the spring when the tool is attached to the main shaft, and the cam device is provided on the suction cover and has a pivot center axis of the lid An end face cam having a contour along the end face of the cylinder centered on the cylinder and a cam follower provided on the lid at a position deviated from the pivot center axis. When the tool is attached to the main shaft, the cam follower is the pivot center of the lid. Move around the axis and this Swarf suction device in the machine tool which is adapted to be opened.

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