JPH0657542U - Machine tool oil mist recovery device - Google Patents

Abstract

(57) [Abstract] [Purpose] Ionize the oil mist inside the machine tool and forcibly collect it to suppress contamination of the work environment. [Structure] A nozzle 9 is provided on a tool rest 5 of a lathe via a joint 10. The processing section 8 includes a main cover 11 and a saddle cover 1.
Cover with 2. The tank 13 receives the cutting oil flowing down from the covers 11 and 12. The discharge electrode 14 is provided on the joint 10 so as to be located substantially in the center of the processed portion 8. The cathode 15a of the transformer 15 for generating a DC high voltage is connected to the discharge electrode 14 via the high voltage cable 16. The anode 15b is connected to the saddle cover 12 via the high voltage cable 17. Oil mist is ionized by corona discharge and saddle cover 1
2 is forcibly sucked. The mist condensed on the saddle cover 12 becomes oil drops and flows down and is collected in the tank 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for collecting oil mist generated during processing in a machine tool.

[0002]

[Prior art]

 Generally, in machine tools that use cutting oil, the cutting oil is supplied from the nozzle to the processing part, the processing part is covered with a cover to prevent scattering of the cutting oil, and the cutting oil flowing down from the cover is collected in the tank. Has become. However, part of the cutting oil discharged at high pressure becomes mist with the high speed rotation of the work, chuck, tool, etc., and the oil mist fills the inside of the cover. Then, when the door is opened, this oil mist flows out of the cover and pollutes the surrounding environment.

Therefore, conventionally, as shown in FIG. 2, a dust collector 32 composed of a mist collector having a blower 31 is installed near the lathe 30, and the dust collector 32 is connected to the cover 34 via a duct 33. There has been proposed an apparatus configured to collect oil mist generated from the processing section 35 in a tank (not shown) in the dust collector 32.

[0004]

[Problems to be solved by the device]

 However, according to the conventional recovery device, not only is it necessary to secure a wide space around the lathe 30 for installing the dust collector 32, but also the noise of the blower 31 becomes another cause of environmental degradation. There were also points.

Therefore, an object of the present invention is to provide a device capable of reliably collecting the oil mist inside the machine tool by means that is space-friendly and does not generate noise.

[0006]

[Means for Solving the Problems] In order to solve the above problems, an oil mist recovery device of the present invention has a nozzle for supplying cutting oil to a processing portion, a cover for covering the processing portion, and a cutting flow down from the cover. A machine tool equipped with a tank for receiving oil is equipped with a transformer that generates a high DC voltage, a discharge electrode is provided in the approximate center of the machined part, the cathode of the transformer is connected to the discharge electrode, and the anode of the transformer is connected. It is configured by connecting to the cover.

[0007]

[Action]

 In the above configuration, when a high DC voltage is applied to the discharge electrode, corona discharge occurs, the air near the discharge electrode is ionized, and an air flow toward the cover is generated. When oil mist is present in these ions, the mist particles are charged with ions and are negatively charged, and they are attracted to the cover, which is a high-voltage anode. Then, the mist aggregated on the cover becomes oil drops and flows down, and is collected in the tank.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a lathe equipped with an oil mist recovery device according to this embodiment. In the figure, 1 is a leg, 2 is a bed, 3 is a tailstock, 4 is a saddle, 5 is a tool rest, and 6 is a bite. , 7 are headstocks, and 8 is a machining section, in which a workpiece (not shown) is turned by a cutting tool 6.

A nozzle 9 for supplying cutting oil to the working portion 8 is mounted on the tool rest 5 via a joint 10. The upper surface and the front surface of the processing portion 8 are covered with a main cover 11 and the rear surface of the processing portion 8 is covered with a saddle cover 12 so that the cutting oil discharged from the nozzle 9 does not scatter around. The tank 13 that receives the cutting oil flowing down from each of the covers 11 and 12 is installed below the processing unit 8. A discharge electrode 14 is attached to the joint 10 via an insulating material (not shown) so as to be located at a substantially central portion of the processed portion 8.

Reference numeral 15 is a transformer for generating a high DC voltage of 80 to 100 KV, which is installed inside or outside the lathe at an appropriate place. The cathode 15a of the transformer 15 is connected to the discharge electrode 14 via a high voltage cable 16, and the anode 15b is connected to the saddle cover 12 via a high voltage cable 17. The saddle cover 12 is attached to peripheral equipment including the saddle 4 via an insulating material (not shown).

The anode 15b is grounded via a ground wire 18 so as to minimize the capacity, that is, the stray capacitance, generated between the high voltage cables 16 and 17, the discharge electrode 14 and the ground side. The transformer 15 is provided with safety devices such as a device for preventing ignition due to spark discharge and a device for preventing electric shock accident. In addition, a sensor may be provided to detect the presence or absence of residual charging on the side of this machine after 1 minute or more has passed since the high-voltage switch was turned off, and an alarm may be generated when there is residual charging.

In the recovery device configured as described above, when a high DC voltage is applied to the discharge electrode 14, corona discharge occurs, the air near the discharge electrode 14 is ionized, and the air flow toward the saddle cover 12 is generated. Occurs. When oil mist is present in the ions, the mist particles are ionized and negatively charged, and the mist particles are forcibly attracted to the saddle cover 12, which is a high-voltage anode. Then, the mist condensed on the saddle cover 12 becomes an oil drop, flows down, and is collected in the tank 13. Therefore, it is possible to reliably collect the oil mist inside the lathe by using a means that is space-friendly and does not generate noise, and thus it is possible to effectively suppress contamination of the working environment.

The present invention is not limited to the above-described embodiment, but may be applied to various machine tools other than lathes that use cutting oil, and the place where the cover and the discharge electrode are installed is appropriately set. In addition, the shape and configuration of each part can be arbitrarily changed without departing from the spirit of the present invention.

[0014]

[Effect of device]

 As described in detail above, according to the present invention, the oil mist is ionized and forcibly collected, so that the oil mist can be removed by means that is space-friendly and does not generate noise. It has an excellent effect that it can be surely collected inside the machine tool, and that the pollution of the working environment can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic view of a lathe showing an oil mist recovery device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a conventional recovery device.

[Explanation of symbols]

1 ・ ・ Legs 2 ・ ・ Beds 3 ・ ・ Tailstocks 4 ・ ・ Saddles 5 ・ ・ Turrets 6 ・ ・ Bites 7 ・ ・ Spindles 8 ・
・ Processing part, 9 ・ ・ Nozzle, 10 ・ ・ Joint, 11 ・ ・ Main cover, 12 ・ ・ Saddle cover, 13 ・ ・ Tank, 1
4 ... Discharge electrode, 15 ... Transformer, 15a ... Cathode,
15b ... Anode, 16,17 ... High-voltage cable, 18 ...
·ground wire.

Claims (1)

[Scope of utility model registration request] 1. A machine tool provided with a nozzle for supplying cutting oil to a processing part, a cover for covering the processing part, and a tank for receiving the cutting oil flowing down from the cover, comprising a transformer for generating a high DC voltage, A discharge electrode is provided in the substantially central part of the processed part, and the cathode of the transformer is connected to the discharge electrode,
An oil mist recovery device characterized in that the anode of the transformer is connected to the cover.