JP2506394Y2 - High-pressure cutting oil supply device for machine tools - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying high pressure cutting oil to a cemented carbide spiral oil hole drill in a lathe, a machining center and the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, in order to supply cutting oil to a drill having a super hard spiral oil hole, a cutting oil b is made into a super hard spiral oil from an oil tank a of a machine tool body by a high pressure pump P. It is pumped to the drill with hole c.

[0003]

However, in the above-mentioned conventional cutting oil supply device, since the high-pressure pump P is used, the noise during operation is large, and the shield part is worn, so that the oil There are problems that leakage easily occurs and that the inside of the pump, that is, the cylinder, the piston ring and the like are worn by the metal powder mixed in the circulating cutting oil. Further, the high-pressure pump requires a large power source, operates the pump at all times, and frequently opens and closes the valve, so it is easy to malfunction, and the cost of electricity increases, which increases the production cost. However, these are the issues to be solved.

The present invention has been made in view of the above-mentioned problems of the above-mentioned conventional techniques. The cutting oil is circulated from an oil tank to a cylinder and from the cylinder to the oil tank, and an air compressor is used. A high-pressure cutting oil supply device for machine tools, in which the above-mentioned problems of the prior art are solved and cost is reduced by pressurizing the cylinder and sending the pressurized cutting oil from the cylinder to the machine tool. Is intended to provide.

[0005]

In order to achieve the above object, a high-pressure cutting oil supply device for machine tools according to the present invention supplies cutting oil to a cylinder through a check valve by a pump, and then from the cylinder. Cutting oil circulating means for returning the blown cutting oil to the oil tank via the normal open valve, and cutting oil pressurizing means for supplying air to the upper part in the cylinder by the compressor via the normal close valve. And a cutting hydraulic pressure feeding means for feeding the high pressure cutting oil from the cylinder to the machine tool.

[0006]

When the pump is started, the cutting oil in the oil tank is sent to the lower part of the cylinder through the oil supply pipe and the check valve. When the inside of the cylinder is filled with cutting oil, it over-flows into the oil feed pipe installed on the upper part of the cylinder.At this time, the normal open valve is in the open state, so the excess cutting oil is
It is returned to the oil tank through a normal open valve. When the pump is stopped, the supply of cutting oil to the cylinder is stopped,
A certain amount of cutting oil is stored in the cylinder.

When operating the machine tool, the air compressor is started. As a result, the air supplied to the air supply pipe is supplied to the upper part of the cylinder because the normal close valve is in the open state, and the upper space part of the cylinder is pressurized to press the cutting oil in the cylinder downward. . As a result, the cutting oil is pressure-fed to the machine tool (carbide spiral drill with oil holes) through the flexible hose. During operation of the air compressor, the normal open valve is in a closed state, so that air does not leak into the oil tank. Further, since the check valve is provided between the pump and the cylinder, the cutting oil in the cylinder does not flow back to the pump side during the operation of the air compressor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a flow chart of an embodiment of the present invention. As shown in the figure, it comprises cutting oil circulating means A, cutting oil pressurizing means B, and cutting hydraulic pressure feeding means C.

The cutting oil circulation means A is constructed as follows. An oil supply pipe 3 is provided below the oil tank 1 and the cylinder 2 provided in a machine tool body (not shown), and the cutting oil D inside the oil tank 1 can be supplied to the lower part of the cylinder 2 so that the oil supply pipe can be supplied. A pump P and a check valve 4 are disposed in the middle of 3, so that the cutting oil D'can be placed inside the cylinder 2.
Is supplied. Then, the cylinder 2 is filled with a preset amount of oil, and then the cutting oil D'overflows by supplying more than this set amount of oil, but the cutting oil D'overflows. An oil feed pipe 5 is provided between the upper part of the cylinder 2 and the oil tank 1 so that the oil tank 1 can be returned to the oil tank 1 along with the flow.
Are arranged.

The cutting oil pressurizing means B is constructed as follows. An air feed pipe 8 is provided above the air compressor 7 and the cylinder 2, and a two port 2 is provided in the middle of the air feed pipe 8.
A normal close valve 9 as a position switching valve is provided so that air is supplied to the upper part of the cylinder 2 by the air compressor 7 to push down and pressurize the cutting oil D'in the cylinder 2. ing.

Further, the cutting hydraulic pressure feeding means C is constructed as follows. The bottom of the cylinder 2 and the machine tool,
That is, the drill 10 with a carbide spiral oil hole is attached to the flexible hose 1
1, the high-pressure cutting oil D'in the cylinder 2 pressurized by the above-mentioned cutting oil pressurizing means B passes through the flexible hose 11 and the super hard spiral oil hole drill 10 Pumped to.

The normal open valve 6 is normally open, whereas the normal close valve 9 is normally closed, and the air compressor 7 is started. Further, the normal close valve 9 is operated in conjunction with the open operation, at this time, the normal open valve 6 is closed, and when the air compressor 7 is stopped, the normal close valve 9 is closed. Therefore, the normal open valve 6 and the normal open valve 6 and 9 are interlocked so that the normal open valve 6 returns to the open state.

Since the normal close valve 9 is closed when the air compressor 7 is stopped, the cutting oil D'in the cylinder 2 is supplied with the cutting oil D'when the cylinder 2 is supplied with oil. It will not be washed to the −7 side.
Further, when the air compressor 7 is operating, the normal open valve 6 is in the closed state, so that air does not leak to the oil feeding pipe 5 and the oil tank 1. Further, since the check valve 4 is arranged between the pump P and the cylinder 2, even if the inside of the cylinder 2 is pressurized by the air compressor 7, the cutting oil D ′ is generated.
Does not flow back to the pump P side. Incidentally, when using the illustrated carbide drill 10 with a spiral oil hole as a machine tool, the cutting oil used is JIS W Class 1 No. 2 (emulsion).
Is diluted about 5 times before use.

[0014]

Since the present invention is constructed as described above, the pump P is operated when necessary (when the amount of cutting oil in the cylinder is low) to circulate the cutting oil. A low-pressure pump can be used as the pump P, and as a result, the problem of pumping cutting oil to the machine tool by the conventional high-pressure pump is solved, and the cost is reduced, thereby reducing the production cost of the workpiece. There is an effect that can reduce.

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of a high pressure cutting oil supply device for machine tools according to the present invention.

FIG. 2 is a flow chart of a conventional high-pressure cutting oil supply device for machine tools.
Indicates a chart.

[Explanation of Codes] A Cutting Oil Circulating Means B Cutting Oil Pressurizing Means C Cutting Hydraulic Pressure Feeding Means D, D'Cutting Oil P Pumps 1 Oil Tank 2 Cylinder 4 Check Valve 6 Normal Open Valve 7 Air Compressor 9 No Markrose valve 10 Machine tools

Claims (1)

(57) [Scope of utility model registration request] 1. A cutting oil circulating means for supplying cutting oil to a cylinder by a pump through a check valve and returning the cutting oil overflowing from the cylinder to an oil tank through a normally open valve, and air for a normal compressor. A cutting oil pressurizing means for supplying the cutting oil through the close valve to the upper part of the shilling, and a cutting hydraulic pressure supplying means for supplying the high pressure cutting oil from the cylinder to the machine tool, wherein the air compressor is in operation. Is a machine tool characterized by being configured to keep the normally open valve closed to prevent air from leaking into the oil tank and prevent backflow of cutting oil in the cylinder to the pump side. High pressure cutting oil supply device.