JPH06129593A - Lubricating oil atomizing device for machine tool - Google Patents

Abstract

PURPOSE:To jet only air from part of nozzles with possibility of stopping, by furnishing an air control valve for pump on the air supply path for pump driving of each unit of atomizing device. CONSTITUTION:A variable capacity chamber 14 is provided between a piston and the inside surface of a cylinder chamber 9. With this chamber 14, the tip of an air supply path 20 for pump driving is connected which extends from an upper intermediate block 3 into a pump body block 6 through a lower intermediate block 4. A solenoid valve PVa as an air control valve for pump is provided on this air supply path 20. In the lower block 4, a pulse generator 21 is installed between the solenoid valve PVa and a lubricating oil pump 5. The air supply path 20 is connected with a high pressure air source P. Thereby only air can be jetted from part of the nozzles of a single unit of atomizing device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil spraying device used to spray a lubricating oil such as cutting oil into a mist on a tool and a work material in various processes such as cutting with a machine tool. More specifically, the high pressure air supplied from the pump driving air supply path is pulsated by the pulse generator, and the pulsating pressure air causes the plunger to reciprocate, thereby periodically lubricating the lubricating oil supplied from the lubricating oil supply path. It consists of a dual-use pipe with a lubricating oil pump that discharges oil to the inner pipe for oil and an outer pipe for air. At the base end, the inner pipe for oil is at the discharge port of the lubricating oil pump, and the outer pipe for air is for spraying air. Oil and air supply pipes that are connected to the supply passages,
The present invention relates to a lubricating oil spraying device including a plurality of spraying device units each including a spraying nozzle provided at the tip of the oil / air supply pipe.

[0002]

2. Description of the Related Art For example, as shown in FIG. 3, when drilling a H-shaped steel W by a drilling machine at a plurality of locations, a plurality of sprays are formed near each of a plurality of drills D1 to D3. Disposing a spray nozzle at the tip of the hose extending from the device alone, these drills D1
Processing is performed while spraying a lubricating oil mist on D3 and the drilling location. In this case, the drilling with the drill D2 on the upper side of the H-shaped steel W shown in FIG. 1 is performed first, and then the drills D1 on both the left and right sides. D3 may be used for drilling. In such a case, when starting drilling with the drills D1 and D3, it is not necessary to spray lubricating oil on the side of the drill D2 that has already been drilled. The chips adhering to the drill D2, the chips around the hole formed by the drill D2, and the chips around the hole are blown off, or the drills D1, D
In order to blow off the chips generated from the H-shaped steel W being processed by No. 3, there is a demand that only the air should be jetted from the spray nozzle on the drill D2 side.

However, in the conventional apparatus, in each of the spraying devices that feed the lubricating oil mist to the spraying nozzles,
Since it was not possible to control the lubricating oil drive air that drives the lubricating oil pump and the spraying air that is supplied to the outer air pipe of the oil / air supply pipe independently, some spray nozzles It is not possible to stop the spraying or to eject only the air in one spraying nozzle, so in the case as described above the drill D
When drilling with 1, D3, the spray nozzle 26 on the side of the drill D2, which has finished processing, must also continue to spray the lubricating oil mist (spraying lubricating oil and air). It became very uneconomical and could not meet the above requirements.

In view of the above problems, the present invention allows only some of the plurality of atomizing nozzles to eject air, and can also stop atomizing of some of the atomizing nozzles. It is an object of the present invention to provide a possible lubricating oil spraying device.

[0005]

In order to solve the above-mentioned problems, a lubricating oil spraying device according to a first aspect of the present invention uses a pulse generator 21 for supplying high pressure air supplied from a pump driving air supply passage 20. And the pulsating pressure air causes the plunger 11 to reciprocate to reciprocate, thereby periodically discharging the lubricating oil supplied from the lubricating oil supply path 18, the oil inner pipe 23, and the air outside. Tube 24
And an inner pipe 23 for oil which is connected to the discharge port of the lubricating oil pump 5 and an outer pipe 24 for air which is connected to the spray air supply passage 25 at the base end thereof. A plurality of spraying device units A, B, and C, each of which includes a pipe 22 and a spray nozzle 26 provided at the tip of the oil / air supply pipe 22, are provided for driving the pumps of the spraying device units A to C. Air control valve PV for pump in air supply passage 20
a, PVb, PVc are provided, the pump driving air supply passage 20 and the spraying air supply passage 25 are used as an air supply source P common to the spraying device units A to C, and the lubricating oil supply passage 25 is provided. It is characterized in that each of the spraying devices A to C is connected to a common lubricating oil supply source T.

Further, in the lubricating oil spraying device of the second aspect, the spraying air control valves FVa, FVb, FVc are provided in the spraying air supply passages 25 of the spraying device units A to C, respectively.

In the lubricating oil spraying device of the third aspect, the lubricating oil discharge flow rate adjustment is performed in which the stroke position of the plunger 21 is displaced in the lubricating oil pump 5 of each spraying device unit A to C to adjust the discharging flow rate of the lubricating oil. It is characterized in that means 17 is provided.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view of a lubricating oil spraying device, FIG. 2 is an external perspective view of one spraying device alone, and FIG. 3 is an overall schematic front view of the lubricating oil spraying device. In these drawings, A, B and C are shown. Is a spraying device alone, and each of these spraying device units A to C has a support 1 made of a laminated body of blocks. The support 1 includes an upper block 2, an upper intermediate block 3,
It is composed of a lower intermediate block 4, a pump body block 6 in which the main part of the lubricating oil pump 5 is formed, and a base block 7. These blocks 2 to 7 are the upper block 2
And the base block 7 are fastened to each other by a pair of fastening screw rods 8 on both sides (see FIG. 2) and integrally coupled and fixed.

As shown in FIG. 1, the lubricating oil pump 5 has a plunger 11 coaxially connected to one end of a piston 10 that slides in a cylinder chamber 9 in a pump body block 6. The plunger 11 moves from a lubricating oil supply hole 12 provided in a direction orthogonal to the plunger 11 to a hole provided coaxially with the plunger 11, that is, a pump chamber 13. is there.
A variable volume chamber 14 is provided between the piston 10 and the inner circumferential surface of the cylinder chamber 9, and a coil spring 15 for returning the plunger is provided on the opposite side of the cylinder chamber 9 from the piston 10. A check valve 16 is provided at the discharge port of the pump chamber 13. In addition, the piston 10
A lubricant oil discharge flow rate adjusting means 17 for adjusting the discharge flow rate of the lubricant oil by displacing the stroke position of the plunger 11 is provided on the outer end side of the.

A lubricating oil supply passage 18 is formed in the lubricating oil supply hole 12 through the upper block 2 and the intermediate blocks 3 and 4 of the apparatus main body 1 and one end of which is connected to a lubricating oil tank T.
Is connected to the other end of the pump chamber 13, and the discharge port side of the pump chamber 13 is provided through the intermediate blocks 3 and 4 to form an oil passage 1.
9 is connected to one end of the communication. A tip end of a pump driving air supply passage 20 extending from the upper intermediate block 3 through the lower intermediate block 4 into the pump body block 6 is connected to the variable volume chamber 14 so as to communicate therewith. A solenoid valve PVa as a pump air control valve is provided in the pump driving air supply passage 20, and a pulse generator 21 is provided in the lower block 4 between the solenoid valve PVa and the lubricating oil pump 5. Has been. The pump driving air supply passage 20 is connected to a high pressure air supply source P.

The high-pressure air supplied from the high-pressure air supply source P to the pump-driving air supply passage 20 is sent to the pulse generator 21 side when the solenoid valve PVa is open, and the pulse generator 21 is supplied with the high-pressure air. And is pulsated by and is introduced into the variable volume chamber 14. The pulsating pressure air introduced into the variable volume chamber 14 causes the plunger 1 coaxial with the piston 10 to be integrated.
1 reciprocates about 100 times per minute, for example, sends the lubricating oil in the lubricating oil supply hole 12 to the pump chamber 13 at each forward movement to pressurize it, and opens the check valve 14 by the hydraulic pressure to open the lubricating oil. Is discharged from the discharge port of the pump chamber 13.

As shown in FIG. 1, the base end of the oil / air supply pipe 22 is attached to the upper block 2 of the support 1 by a nipple 29 on the end face thereof. The oil / air supply pipe 22 is configured as a double pipe of an oil inner pipe 23 and an air outer pipe 24 concentric with the inner pipe 23,
In the upper block 2, the oil inner pipe 23 is connected to the oil passage 1
9, the outer air pipe 24 is connected to the spray air supply passage 25, and a spray nozzle 26 is provided at the tip of the supply pipe 22. A solenoid valve FVa as a spraying air control valve is provided in the spraying air supply path 25, and the spraying air supply path 25 is provided.
Is connected to the same high-pressure air supply source P as the pump-driving air supply passage 20. 2 in FIGS. 1 and 2.
7 is the oil / air supply pipe 2 from the spraying air supply passage 25.
A spraying air flow rate adjusting valve for adjusting the flow rate of the spraying air supplied to the second air outer tube 24, which is attached to the upper block 2.

The oil / air supply pipe 22 is divided into a flexible pipe portion 22a on the front side and a non-flexible pipe portion 22b on the front side through a connecting block 28 provided midway. In the front flexible tube portion 22a, the oil inner tube 23 and the air outer tube 24 are made of, for example, nylon hoses, and the non-flexible tube portion 22b on the front side is the oil inner tube. 23 is made of the same nylon hose as that of the flexible tube portion 22a, and its air outer tube 24 is made of a bendable and deformable copper pipe, for example. The non-flexible tube portion 22
At the tip of the atomizing nozzle 26 attached to the tip of b, the lubricating oil fed by the oil inner tube 23 mixes with the high pressure air fed by the air outer tube 24, and the tip of the nozzle 26 concerned. More lubricating oil mist is ejected.

Although the structure of the spraying device unit A has been described above, the structures of the other spraying device unit B and the spraying device unit C are exactly the same as the above-described spraying device unit A. As shown in FIG. 1, in the spraying device single unit B, a solenoid valve as a pump air control valve is shown as PVb, and as a spraying air control valve is shown as a solenoid valve FVb. In the spraying device single unit C, a pump air control valve is shown. Is shown as PVc, and a solenoid valve FVc as a spraying air control valve is shown. Further, as shown in FIG. 1, the pump driving air supply passages 20 and the spraying air supply passages 25 of the spraying device units A to C respectively have a common high-pressure air supply source P and a lubricating oil tank (lubricating oil supply). Source) T, and a main air control valve (solenoid valve) MV is provided between the high pressure air supply source P and each pump driving air supply passage 20. Further, each support 1 of each of the spraying devices A to C is attached to one attachment panel 30 as shown in FIGS. 2 and 3, and the lubricating oil tank T is provided at the center of the attachment panel 30. It is installed (see Figure 3).

In the use of the lubricating oil spraying device having the above-mentioned structure, when the H-shaped steel W is drilled at a plurality of locations by a drilling machine, as shown in FIG. The spray nozzle 26 of the spray device B is set near the positioned drill D2, and the drills D1 and D3 positioned on both left and right sides of the H-shaped steel W are set.
The respective spray nozzles 26 of the spray device single unit A and the spray device single unit C are set in the vicinity of. In this case, if it is assumed that drilling of the horizontal wall portion h of the H-shaped steel W is performed first by the drill D2 and then drilling of the vertical wall portion V of the H-shaped steel W is performed by the drills D1 and D3. , Drill D
The spray air control valve (solenoid valve PVb) and the spray air control valve (solenoid valve FVb) of the spray device B corresponding to the spray nozzle 26 on the second side are opened, respectively, and the lubricating oil discharge flow rate adjusting means 17 is provided. And the atomizing air flow rate adjusting valve 27 are adjusted appropriately. At this time, the air control valves (solenoid valves PVa and PVc) and the air control valves for spraying (solenoid valves FVa and FVc) for the pumps of the spraying device units A and C corresponding to the spraying nozzles 26 on the drills D1 and D3 side, respectively. Are closed.

Thus, the lubricating oil tank (lubricating oil supply source)
Since the lubricating oil is constantly supplied from T to the lubricating oil supply passages 18 of the individual spraying devices A to C, when the main air control valve MV is opened, the high-pressure air from the high-pressure air supply source P becomes the single spraying device. It is supplied only to the pump-driving air supply passage 20 and the spraying air supply passage 25 of B, so that the spraying nozzle 26 on the side of the drill D2 for performing the drilling process first.
Lubricating oil mist is jetted from the drill D
The spray nozzles 26 on the first and D3 sides are in a stopped state.

Next, when the horizontal wall portion h of the H-shaped steel W is drilled by the drill D2 and the vertical wall portions v of the H-shaped steel W are drilled by the drills D1 and D3, , The spray nozzles 26 on the side of the drills D1 and D3, and the air control valves (solenoid valves PVa and PVc) and the spray air control valves (solenoid valves FVa and FVc) for the respective pumps of the spraying device units A and C corresponding respectively. The valve is opened, and the lubricating oil discharge flow rate adjusting means 17 and the atomizing air flow rate adjusting valve 27 are adjusted appropriately. At this time, when it is desired to eject only the air from the spray nozzle 26 on the side of the drill D2, the pump air control valve (solenoid valve PVb) of the spray device unit B corresponding to the nozzle 26 is closed, and the spray air is sprayed. The control valve (solenoid valve FVb) may be opened, and if it is desired to stop both the air and the lubricating oil from the spray nozzle 26 on the drill D2 side, the pump air control valve for this spray device unit B Both the (solenoid valve PVb) and the spraying air control valve (solenoid valve FVb) may be closed.

As the lubricating oil discharge flow rate adjusting means 17, as illustrated in FIG. 1, a screw shaft 32 threadably passing through a fixing member 31 fixed to the outer end side of the cylinder chamber 9,
The screw shaft 32 includes a support disc 33 provided on the inner end of the screw shaft 32 to support the outer end surface of the piston 10, and a knob 34 attached to the outer end of the screw shaft 32. The rear end position of the piston 10 can be changed by rotating and rotating the support disk 33 in the axial direction.

Further, in the embodiment, each spraying device unit A to C is used.
Atomizing air control valve FV in the atomizing air supply passage 25 of
Although each of a, FVb, and FVc is provided, a spraying air control valve is not necessarily required in this spraying air supply passage 25.

[0020]

According to claim 1 of the present invention, by providing the pump air control valve in the pump driving air supply passage of each spraying device unit, the pump air control of all spraying device units is achieved. By opening the valve, it is possible to eject the lubricating oil mist from all spray nozzles at the same time, and by closing the air control valve for the pump of some spray devices alone, Only air can be ejected from the spray nozzle. Therefore, for example, when performing drilling at a plurality of locations on a work by a drilling machine equipped with a plurality of drills, one hole may be drilled first, and then another drill may be drilled. However, in such a case, when performing the subsequent drilling process, the jetting of the lubricating oil from the spray nozzle on the drill side, which has already finished processing, is stopped,
By ejecting only air, wasteful use of lubricating oil can be eliminated, and the chips adhering to the drill by the air and the chips in the hole drilled by the drill and its surroundings. It can be used effectively, for example, by blowing away the material, or by blowing off the chips generated from the workpiece during the subsequent drilling with another drill.

According to a second aspect of the invention, each spray unit is provided with a pump air control valve in the pump driving air supply passage, and a spray air control valve in the spray air supply passage. Therefore, by closing the pump air control valve and the atomizing air control valve in any of the spraying devices alone, the lubricating oil mist, that is, the lubricating oil and air from the spraying nozzle of the arbitrary spraying device itself is ejected. Can be stopped.

Further, when the lubricating oil pump of each spraying device is provided with the lubricating oil discharge flow rate adjusting means, the adjusting means adjusts the discharging flow rate of the lubricating oil. The lubricating oil concentration can be set to a desired concentration according to the type of processing.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional explanatory view of a lubricating oil spraying device showing an embodiment of the present invention.

FIG. 2 is an external perspective view of one spraying device alone of the lubricating oil spraying device.

FIG. 3 is an explanatory diagram illustrating a usage state of the lubricating oil spraying device.

[Explanation of symbols]

 A spraying device single unit B spraying device single unit C spraying device single unit 1 support 5 lubricating oil pump 11 plunger 17 lubricating oil discharge flow rate adjusting means 18 lubricating oil supply passage 19 oil supply passage 20 pump driving air supply passage 21 pulse generator 22 oil・ Air supply pipe 23 Oil inner pipe 24 Air outer pipe 25 Spraying air supply path 26 Spraying nozzle 27 Spraying air flow rate control valve T Lubricating oil tank P High pressure air supply source PVa Solenoid valve (pump air control valve) ) PVb solenoid valve (pump air control valve) PVc solenoid valve (pump air control valve) FVa solenoid valve (spray air control valve) FVb solenoid valve (spray air control valve) FVc solenoid valve (spray air control valve) )

Claims (3)

[Claims] 1. A high-pressure air supplied from a pump-driving air supply passage is pulsated by a pulse generator, and the pulsating pressure air reciprocates a plunger,
It consists of a lubricating oil pump that periodically discharges the lubricating oil supplied from the lubricating oil supply passage, and a double pipe with an oil inner pipe and an air outer pipe. A spraying device consisting of an oil / air supply pipe in which an outer air pipe is connected to the spraying air supply passage, and a spray nozzle provided at the tip of the oil / air supply pipe. A lubricating oil spraying device comprising a plurality of single units, wherein a pump air control valve is provided in the pump driving air supply route of each spraying unit, and the pump driving air supply route and the spraying air supply route are provided. A lubricating oil spraying device for machine tools, comprising a high-pressure air supply source common to each spraying device and the lubricating oil supply passage connected to a lubricating oil supply source common to each spraying device. 2. The lubricating oil spray device for machine tools according to claim 1, wherein an atomizing air control valve is provided in the atomizing air supply passage of each atomizing device. 3. The lubricating oil pump of each said spraying device is provided with a lubricating oil discharge flow rate adjusting means for adjusting the discharge flow rate of the lubricating oil by displacing the stroke position of the plunger. Lubricating oil spray device for machine tools.