MACHINE TOOL

Provided is a machine tool capable of reducing the influence of vibration from the side of a base of a vibration removal device. A machine tool is provided with: a vibration removal device that is provided on a base and that blocks the vibration transmitted from the base; a frame which is disposed on the vibration removal device and on which the machine tool body is placed; a container that is disposed on the base, that is for storing a liquid, and that is connected to a hose for discharging the stored liquid; and a flow path that is provided to the frame and that is for passing the liquid flowing from the machine tool body to the end of the frame and pouring the liquid into the container.

TECHNICAL FIELD

The present invention relates to a machine tool for machining a workpiece using a tool.

BACKGROUND ART

JP 2003-285241 A discloses a machine tool that protects a linear motion slider from chips and oil mist by covering the linear motion slider mounted on a vibration isolation device (vibration isolation table) with a slide cover. In this machine tool, a pipe is connected to an oil reservoir of a rail of the linear motion slider, and the dust collector suctions oil stored in the oil reservoir, via the pipe.

SUMMARY OF THE INVENTION

However, in the machine tool disclosed in JP 2003-285241 A, vibration from the base of the vibration isolation device may be transmitted to the rail of the linear motion slider via the pipe. In this case, there is a concern that the machining accuracy of the machine tool main body including the linear motion slider mounted on the vibration isolation device may be deteriorated.

An object of the present invention is to provide a machine tool which is capable of reducing the influence of vibration transmitted from a base of a vibration isolation device.

According to an aspect of the present invention, there is provided a machine tool for machining a workpiece using a tool, including: an vibration isolation device provided on a base and configured to isolate vibration transmitted from the base; a pedestal provided on the vibration isolation device and on which a machine tool main body is disposed; a container provided on the base and configured to store liquid, wherein a hose is connected to the container in order to discharge the stored liquid; and a flow path provided in the pedestal and configured to cause the liquid flowing out from the machine tool main body to flow to an end portion of the pedestal and fall into the container.

According to the present invention, it is possible to physically separate the container provided on the base of the vibration isolation device and the flow path provided on the pedestal on the vibration isolation device. Therefore, it is possible to prevent vibration from propagating from the base of the vibration isolation device to the pedestal thereof. As a result, it is possible to reduce the influence of vibration from the base of the vibration isolation device.

DESCRIPTION OF THE INVENTION

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG.1is a schematic view showing a machine tool10according to the present embodiment. The machine tool10machines a workpiece (an object to be machined) by using a tool. The machine tool10may be a precision machine tool that machines a workpiece in accordance with a command with a machining accuracy of 100 nm or less. Further, the machine tool10may be a precision machine tool that machines a workpiece in accordance with a command with a machining accuracy of 10 nm or less. The command is defined by a machining program stored by the machine tool10. The machine tool10includes a vibration isolation device12, a pedestal14, a container16, and a flow path18.

The vibration isolation device12is a device that isolates vibration transmitted from a base20. The vibration isolation device12is provided on the base20. The vibration isolation device12uses a spring system such as an air spring, a coil spring, or a vibration isolation rubber to isolate vibration transmitted from the base20by a damper. The vibration isolation device12may include a feedback mechanism that controls an actuator that drives the pedestal14using a sensor disposed on the pedestal14, so as to suppress vibration of the pedestal14. In addition, the vibration isolation device12may have a feedforward mechanism that controls an actuator that drives the pedestal14using a sensor disposed on the base20, so as to suppress propagation of vibration from the base20. Note that the number of the vibration isolation devices12may be one or more.FIG.1shows an example in which four vibration isolation devices12are disposed at the four corners of the lower surface of the pedestal14, respectively.

The pedestal14is a table on which a machine tool main body22is disposed. The pedestal14is provided on the vibration isolation devices12. The machine tool main body22includes a linear motion mechanism24disposed on the upper surface of the pedestal14. The linear motion mechanism24is a mechanism that moves along one direction. The linear motion mechanism24includes a guide rail26extending in one direction and a slider28that slides on the guide rail26. The number of the linear motion mechanisms24may be one or more.

In the present embodiment, the linear motion mechanism24includes a first linear motion mechanism24A that is movable along a first direction, and a second linear motion mechanism24B that is movable along a second direction orthogonal, in a plane, to the first direction. The guide rail26of the first linear motion mechanism24A extends in the first direction, and the guide rail26of the second linear motion mechanism24B extends in the second direction.

The container16is a container capable of storing liquid. The container16is provided on the base20. When an oil bearing is formed between the guide rail26and the slider28, the liquid stored in the container16contains oil. When cutting fluid is sprayed onto the workpiece during machining, the liquid stored in the container16includes the cutting fluid. A hose16A for discharging the stored liquid is connected to the container16. The liquid stored in the container16is sucked by a pump through the hose16A.

The flow path18is a path that enables the liquid flowing out from the machine tool main body22to flow to the end portion of the pedestal14therethrough and to then drop into the container16. The flow path18is provided in the pedestal14. The entire flow path18may be provided on the upper surface of the pedestal14. Alternatively, a portion thereof may be provided on the upper surface of the pedestal14and the remaining portion thereof may be provided outside the pedestal14. That is, the flow path18is provided at least on the upper surface of the pedestal14. The flow path18provided on the upper surface of the pedestal14may be a groove formed in the pedestal14or may be a member fitted into the groove.

A discharge port18OT of the flow path18is located above the container16at a distance from the container16. That is, the flow path18and the container16are not in contact with each other. The flow path18provided on the pedestal14on the vibration isolation device12is physically separated from the container16provided on the base20of the vibration isolation device12. In the present embodiment, the flow path18includes a first flow path18A and a second flow path18B.

The first flow path18A is disposed on each of both sides of the guide rail26of the first linear motion mechanism24A, and linearly extends along the guide rail26. One end of each first flow path18A is closed, and the other end of each first flow path18A is open. The other end of each first flow path18A is the discharge port18OT. Each first flow path18A receives liquid flowing out from the first linear motion mechanism24A and causes the received liquid to fall from the discharge port18OT into the container16.

The second flow path18B includes a first portion B1and a second portion B2. The first portion B1is disposed on each of both sides of the guide rail26of the second linear motion mechanism24B and linearly extends along the guide rail26. One end of each first portion B1is closed, and the other end of each first portion B1is open. The second portion B2is provided outside the pedestal14and below the other end of each first portion B1, and linearly extends along the first direction in which the first linear motion mechanism24A moves. One end of the second portion B2is closed, and the other end of the second portion B2is open. The other end of the second portion B2is the discharge port18OT. In the second flow path18B, liquid flowing out from the second linear motion mechanism24B is received by the first portion B1, the received liquid is caused to flow from the other end of the first portion B1to the second portion B2, and is caused to fall into the container16from the discharge port18OT of the second portion B2.

As described above, in the machine tool10of the present embodiment, the container16provided on the base20of the vibration isolation device12and the flow path18provided on the pedestal14on the vibration isolation device12are physically separated from each other. Thus, even when vibration generated in the base20is transmitted to the container16or vibration generated by the pump is transmitted to the container16via the hose16A, the vibration transmitted to the container16can be prevented from being propagated to the pedestal14on the vibration isolation device12. As a result, it is possible to reduce the influence of vibration from the base20of the vibration isolation device12.

Note that the discharge port18OT of the flow path18may be positioned at an end portion of the pedestal14. Alternatively, as shown inFIG.1, the discharge port18OT of the flow path18may be positioned outward of the end portion of the pedestal14. In a case where the discharge port18OT of the flow path18is positioned outside the end portion of the pedestal14, it is possible to suppress the liquid falling from the discharge port18OT from flowing on the peripheral side surface of the pedestal14.

The volume of the flow path18may be smaller than the volume of the container16. In such a volume relationship, it is possible to suppress leakage of liquid from the container16. Specifically, for example, when, in response to occurrence of a power failure or the like, the supply of liquid in the machine tool main body22comes to a stop and the pump that suctions liquid stored in the container16via the hose16A comes to a stop, it is possible to prevent leakage of the liquid remaining in the flow path18from the container16.

In addition, the flow path18may be inclined such that the closer to the end portion of the pedestal14, the lower the height of the flow path from the base20. In the case of the present embodiment, the first flow path18A is inclined such that the height of the flow path from the base20becomes lower toward an end on the short side of the rectangular-parallelepiped-shaped pedestal14along the first direction in which the guide rail26of the first linear motion mechanism24A extends. The first portion B1of the second flow path18B is inclined such that the height of the flow path from the base20becomes lower toward an end on the long side of the rectangular-parallelepiped-shaped pedestal14along the second direction in which the guide rail26of the second linear motion mechanism24B extends. Similarly to the first flow path18A, the second portion B2of the second flow path18B is inclined such that the height of the flow path from the base20becomes lower toward an end on the short side of the rectangular-parallelepiped-shaped pedestal14along the first direction in which the guide rail26of the first linear motion mechanism24A extends. In a case where the flow path18is inclined such that the height of the flow path from the base20becomes lower toward the end portion of the pedestal14, liquid flowing out from the machine tool main body22easily flows to the end portion of the pedestal14.

The invention that can be understood from the above embodiment will be described below.

The present invention resides in a machine tool (10) for machining a workpiece using a tool. The machine tool (10) includes an vibration isolation device (12) provided on a base (20) and configured to isolate vibration transmitted from the base (20); a pedestal (14) provided on the vibration isolation device (12) and on which a machine tool main body (22) is disposed; a container (16) provided on the base (20) and configured to store liquid, wherein a hose (16A) is connected to the container (16) in order to discharge the stored liquid; and a flow path (18) provided in the pedestal (14) and configured to cause the liquid flowing out from the machine tool main body (22) to flow to an end portion of the pedestal (14) and fall into the container (16).

This makes it possible to physically separate the container (16) provided on the base (20) of the vibration isolation device (12) and the flow path (18) provided on the pedestal (14) on the vibration isolation device (12) from each other, and to block propagation of vibration from the base (20) of the vibration isolation device (12) to the pedestal (14) thereof. As a result, it is possible to reduce the influence of vibration from the base (20) of the vibration isolation device (12).

The flow path (18) and the container (16) may not be in contact with each other. As a result, the container (16) provided on the base (20) of the vibration isolation device (12) is physically separated from the flow path (18) provided on the pedestal (14) on the vibration isolation device (12).

The flow path (18) may be inclined such that the height of the flow path from the base (20) becomes lower towards the end portion of the pedestal (14). Accordingly, the liquid flowing out from the machine tool main body (22) can easily flow to the end portion of the pedestal (14).

The discharge port (18OT) of the flow path (18) may be located outward of the end portion of the pedestal (14). Accordingly, it is possible to prevent the liquid falling from the discharge port (18OT) from flowing on the peripheral side surface of the pedestal (14).

The volume of the flow path (18) may be less than the volume of the container (16). Accordingly, it is possible to prevent leakage of liquid from the container (16).

The machine tool (10) may be a precision machine tool that machines a workpiece in accordance with a command with a machining accuracy of 100 nm or less. As a result, it is possible to suppress an adverse effect on the machining accuracy of a precision machine tool.