JPH07290343A - Cutting liquid feeding device - Google Patents

Abstract

PURPOSE:To feed a cutting liquid to the machining section of a machine tool at a high pressure with a small and inexpensive structure. CONSTITUTION:A sealed chamber 6 storing a cutting liquid C is installed on a tool rest 2. The sealed chamber 6 is provided with a cutting liquid guide port 7, a cutting liquid discharge port 8, an air guide port 9, and a water level sensor 10 detecting the liquid level higher than the cutting liquid discharge port 8. The cutting liquid guide port 7 is connected to a cutting liquid pump 13, the cutting liquid discharge port 8 is connected to a nozzle 15, and the air guide port 9 is connected to a compressor 18 via a solenoid valve 17. The solenoid valve 17 is opened by the detection signal of the water level sensor 10, the cutting liquid C in the sealed chamber 6 is pressurized by high-pressure air A and sprayed near to a cutting tool 5 from the nozzle 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying a cutting fluid to a working portion of a machine tool.

[0002]

2. Description of the Prior Art Generally, in a machine tool,
Water-soluble cutting fluid is widely used for the purpose of lubrication and discharge of chips. In particular, in recent years, in order to improve the cooling effect and the chip discharge efficiency, a device capable of supplying cutting fluid vigorously is required. In the conventional cutting fluid supply device,
A large capacity pump was used to obtain a high supply pressure, as the supply pressure is determined by the pump capacity.

[0003]

However, when a pump with a large capacity is used, power consumption increases and it is uneconomical.
In addition, there is a problem that the entire device becomes large and disadvantageous in space.

Therefore, an object of the present invention is to provide a device capable of supplying cutting fluid at a high pressure by a small and inexpensive mechanism.

[0005]

In order to solve the above problems, the cutting fluid supply apparatus of the present invention has a closed chamber for accumulating the cutting fluid in the vicinity of the machined portion of a machine tool, and introducing the cutting fluid into the closed chamber. Port, cutting fluid discharge port and air inlet, connect the cutting fluid inlet to the cutting fluid pump, connect the cutting fluid outlet to the nozzle, connect the air inlet to the high pressure air source, Is configured to pressurize the cutting fluid in the closed chamber and eject it from the nozzle. further,
A water level sensor that detects the liquid level higher than the cutting fluid discharge port is installed in the closed chamber, the air inlet is connected to the high pressure air generation source via a solenoid valve, and the solenoid valve is opened by the detection signal of the water level sensor It is configured to pressurize the cutting fluid in the closed chamber with air and eject it from a nozzle.

[0006]

According to the above construction, the cutting fluid is pressurized by the high pressure air in the closed chamber and is jetted out vigorously from the nozzle. Therefore, even if a cutting fluid pump of relatively small capacity is used, It can be supplied to the processing section of a machine tool.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIG.
And it demonstrates based on FIG. The cutting fluid supply device 1 of this embodiment is mounted on a tool rest 2 of a lathe. The tool rest 2 includes a turret 3, and a tool 5 is attached to the turret 3 via a tool holder 4. The cutting fluid supply device 1 is provided with a closed chamber 6 for accumulating the cutting fluid C in the vicinity of a cutting tool 5 which is a processing part of a lathe.

A cutting fluid introduction port 7 and a cutting fluid ejection port 8 are provided at substantially the same height above the closed chamber 6, and an air introduction port 9 is provided below the closed chamber 6. A water level sensor 10 for detecting a liquid level higher than the cutting fluid discharge port 8 is mounted on the upper surface of the closed chamber 6.
Further, inside the closed chamber 6, a plurality of partition plates 11 for separating the air introduction port 9 and the cutting fluid discharge port 8 are provided.

The cutting fluid inlet 7 is connected to a cutting fluid pump 13 via a pipe 12. Cutting fluid discharge port 8 is pipe 1
It is connected to the nozzle 15 via 4. Air inlet 9
Is connected via a pipe 16 and a solenoid valve 17 to a compressor 18, which is a high-pressure air generation source. In addition, pipe 1
Check valves 19 and 20 are provided on the valves 2 and 16.

In this embodiment, the cutting fluid C is supplied to the closed chamber 6 from the cutting fluid pump 13 at a pressure of about 4 kg / cm ² . Air A has a pressure higher than that of cutting fluid C, 5-6 kg /
It is supplied from the compressor 18 to the closed chamber 6 at a pressure of about cm ² . Then, the cutting fluid supply device 1 opens the electromagnetic valve 17 in response to the detection signal of the water level sensor 10, pressurizes the cutting fluid C in the closed chamber 6 from above with the high-pressure air A, and moves it from the nozzle 15 to the vicinity of the cutting tool 5. It is designed to squirt.

Cutting fluid supply device 1 constructed as described above
In the above, the cutting fluid C is continuously supplied from the cutting fluid pump 13 to the closed chamber 6, and when the liquid level thereof reaches a higher level than the cutting fluid discharge port 8, the water level sensor 10 is turned on, and in response to this, electromagnetic waves are generated. The valve 17 is opened, and the air A compressed by the compressor 18 is supplied to the closed chamber 6 via the pipe 16. When the compressed air A is sent from the narrow pipe 16 into the large-capacity closed chamber 6, the bubbles thereof expand rapidly, and the pressure causes the cutting fluid C to be pressurized from above, causing the cutting fluid discharge port 8 and the piping 14 to flow. It is vigorously ejected from the nozzle 15 via the nozzle. In addition, since the partition plate 11 is provided in the closed chamber 6, there is no possibility of bubbles directly coming out from the cutting fluid discharge port 8, and the foaming of the cutting fluid C can be effectively prevented.

When the level of the cutting fluid C is lowered, the water level sensor 10 is turned off, the electromagnetic valve 17 is closed, and the supply of the air A is stopped. In this way, the water level sensor 10 detects the liquid level and controls the opening / closing of the electromagnetic valve 17, whereby the air A is intermittently supplied to the closed chamber 6. Therefore, an appropriate amount of the cutting fluid C can always be continuously supplied from the nozzle 15 to the vicinity of the cutting tool 5 at a high speed without enclosing the cutting fluid C in the closed chamber 6 with the air A having a higher pressure than that. Therefore, the cutting fluid pump 1 with relatively small capacity
3 can be used, the operating cost of the cutting fluid supply device 1 can be reduced, and space can be saved.

The present invention is not limited to a lathe, but can be applied to various machine tools such as a grinding machine, a milling machine and a machining center. Further, the installation location of the cutting fluid supply device is not limited to the tool rest, and it is also possible to install the cutting fluid supply device in each part near the machining part of the machine tool for implementation. In addition, the present invention is not limited to the above embodiment,
The shapes and configurations of the respective parts may be appropriately modified and embodied without departing from the spirit of the present invention.

[0014]

As described above in detail, according to the present invention, the cutting fluid in the closed chamber is pressurized by high-pressure air and jetted, so that the cutting fluid can be pressurized at a high pressure by a small and inexpensive mechanism. It has an excellent effect that it can be supplied with.

[Brief description of drawings]

FIG. 1 is a schematic view of a cutting fluid supply device showing an embodiment of the present invention.

FIG. 2 is a sectional view of a closed chamber in the cutting fluid supply device of FIG.

[Explanation of symbols]

1 ... Cutting fluid supply device, 2 ... Turret, 5 ...
6 ... Closed chamber, 7 ... Cutting fluid inlet, 8 ... Cutting fluid outlet, 9 ... Air inlet, 10 ... Water level sensor,
11 ・ ・ Partition plate, 13 ・ ・ Cutting liquid pump, 15 ・ ・ Nozzle, 17 ・ ・ Solenoid valve, 18 ・ ・ Compressor, A ・ ・ Air, C ・ ・ Cutting liquid

Claims (2)

[Claims] 1. A closed chamber for storing cutting fluid is installed in the vicinity of a machined portion of a machine tool, and a cutting fluid introduction port, a cutting fluid discharge port, and an air introduction port are provided in the closed chamber, and the cutting fluid introduction port is a cutting fluid pump. , The cutting fluid outlet is connected to the nozzle, the air inlet is connected to the high pressure air source, and the high pressure air pressurizes the cutting fluid in the closed chamber to eject it from the nozzle. apparatus. 2. A water level sensor for detecting a liquid level higher than a cutting fluid discharge port is provided in a closed chamber, an air inlet is connected to a high pressure air generation source via a solenoid valve, and an electromagnetic wave is generated by a detection signal of the water level sensor. The cutting fluid supply device according to claim 1, wherein a valve is opened and the cutting fluid in the closed chamber is pressurized with high-pressure air and ejected from a nozzle.