KR200276853Y1 - Plasma underwater cutting device - Google Patents

Abstract

The present invention relates to a plasma underwater cutting device for preventing dust and ultraviolet rays, noise, and thermal deformation of the product generated when cutting ferrous and nonferrous metals with a plasma cutting machine of NC (numerical control). Large water tank (Water Tank) 10 which can be installed to fill the water; An air tank (11) installed at one end of the lower side of the work tank to raise the water tank and the water in the tank to the upper portion of the material; An air pipe line (20) (21) connected to supply and exhaust compressed air in the air tank; An air supply and exhaust solenoid valve (31) (32) for electrically controlling on and off of compressed air supplied to the tank by receiving air from the main valve and the air head; A loose wheel terminal plate 34 connected to the valve by discharging the instantaneous current generated by the solenoid valve; It is connected to NC power through guide rail and roller, and the operator can control the air supply and exhaust solenoid valve in front of NC monitor.

Description

Plasma underwater cutting device

The present invention relates to a plasma underwater cutting device to prevent dust and ultraviolet rays, noise, and thermal deformation of products caused by cutting ferrous and nonferrous metals with NC (numerical control) plasma cutters. By floating the water in the tank side to the upper part of the workbench and cutting it in the water, it is excellent in collecting and blocking dust, ultraviolet rays and noise, and contributing to the improvement of quality by preventing thermal deformation of the product by thermal expansion. will be.

In the related art, as shown in FIG. 1, the work table 12 is installed in the concrete water tank 80, and water is appropriately filled in the bottom portion of the concrete water tank 80.

When the material 60 is placed on the vertical bar 13 inserted into the work table 12 and ignited by the plasma torch 50 by the fluid spray method in the air, water is sprayed around the nozzle 51 in the form of radiation. The jetting jet 55 generates a jet jet 55 of a high heat source plasma arc through the electrode 53, and cuts non-ferrous metals, which are mainly impossible to cut gas, by using the jet 53.

When cutting non-ferrous metals by plasma in the air, since high-temperature plasma is used as a heat source, nitrogen and oxygen in the air dried in the plasma air react to generate a lot of nitrogen compounds and generate dust (fume) 70.

In the fluid injection method, spraying water around the nozzle in the form of radiation has the purpose of helping the arc go straight, reducing the fume and cooling the material, but it has not been an effective solution because it is not effective.

Therefore, the plasma cutting by the fluid injection method in the air as described above causes a large amount of dust (fume), strong ultraviolet rays, noise, etc., so that the working environment is extremely poor, causing various occupational diseases, and the thermal expansion and As the product deforms during shrinkage, it is a factor that degrades the quality.

The present invention was devised to solve the above problems, and it is possible to fundamentally collect and block dust, ultraviolet rays, and noise generated during plasma cutting by the fluid spray method in the air, and to prevent product deformation due to thermal expansion. The aim is to provide a plasma cutting device.

1 is a perspective view showing a conventional plasma cutting state,

2 is a perspective view of the plasma cutting device of the present invention,

Figure 3a is a first ready state for the plasma underwater cutting,

Figure 3b is a state filled with water in the water tank for plasma cutting underwater,

3c is a state in which the water tank is completely filled with water for plasma cutting underwater;

Figure 4a is a state in which the plasma underwater cutting,

Figure 4b is a state in which the completion of the plasma underwater cutting and draining the water in the water tank,

4c is a state in which the plasma underwater cutting is completed and the water in the water tank is completely removed.

<Description of the code | symbol about the principal part of drawing>

10: water tank 11: air tank

12: workbench 16: seal opening (IN, OUT)

19: water level 20: air supply pipeline

21: air exhaust pipeline 30: distribution box

31: air supply solenoid valve 32: air exhaust solenoid valve

34: Loose filter terminal board 44: NC operation panel

50: plasma torch 51: nozzle

60: iron plate (material) 70: dust (fume)

The present invention having such a purpose is installed on the work table 12 therein and the water tank (10) can be filled with water; An air tank 11 installed at one end of the lower side of the water tank side of the work table 12 to allow the water in the water tank 10 to rise to the upper portion of the material by air pressure; An air pipeline (20) (21) connected to supply or exhaust compressed air in the air tank (11); Air supply and exhaust solenoid valve (31) for electrically controlling the on and off of the compressed air that is supplied to the air tank (11) through the air pipeline (20, 21) and vice versa (32); A loose filter terminal plate (34) for discharging the instantaneous current to the air supply and exhaust solenoid valves (31) (32) to perform operation; It is characterized in that it comprises a NC operating panel 44 is connected to the wire of the Loose filter terminal plate 34 to control the opening and closing of the air supply and exhaust solenoid valve 31, 32.

The present invention prevents dust 70, ultraviolet rays, noise, etc. by floating the water in the water tank 10 over the upper material 60 of the work table 12 to allow the torch 50 to cut in the water. I did it.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a state in which the plasma cutting device of the present invention is installed, a square water tank 10 made of iron plate is installed in the concrete water tank 80, the lower side of one side in the water tank 10 An air tank 11 is installed to float the water inside the air pressure in the air, and the bottom of the air tank 11, the water opening and closing passage for allowing the water to pass according to the injection or exhaust of the compressed air 16 is formed, the work table 12 is installed above the air tank 11 in the water tank side 10.

In addition, water is contained in the water tank side 10 and the air tank 11, the capacity of the air tank 11 is configured to be proportional to the area and the water level of the water tank side (10).

One side of an air supply pipeline 20 for supplying compressed air is connected to an upper portion of the edge of the air tank 11, and the air supply pipeline 20 is in the distribution box 30 that can electrically open and close the compressed air. It is connected to the air supply solenoid valve 31.

The air supply solenoid valve 31 is connected to the air head 33, the air head 33 is connected to the air supply main valve 35 is connected to an air compressor (not shown).

In addition, one side of the air exhaust pipeline 21 is connected to an upper portion of the air tank 11, and the air exhaust pipeline 21 is connected to the air exhaust solenoid valve 32.

The air supply and exhaust solenoid valves 31 and 32 are connected to a loose filter terminal plate 34 for discharging an instantaneous current so that its operation is performed, and the wires of the loose filter terminal plate 34 are connected to an upper pipeline. It is supported by the guide roller 41 which is guided by the guide rail 40 through, and is connected to the NC operating plate 44 in the state capable of moving the position and expansion and contraction with the guide roller 41 in the longitudinal direction.

The NC operation panel 44 is provided with air IN and OUT toggle switches 42 and 43 for automatically opening and closing the air supply and exhaust solenoid valves 31 and 32, and the air tank by electric signals. (11) is configured to control the supply, shutoff and exhaust of air.

Referring to the operation of the present invention configured as described above are as follows.

First, as shown in FIG. 3A, water is always filled up to the first water level 15 up to the upper portion of the air tank 11 (the water tank is filled in the air tank), and the air supply main shown in FIG. The valve 35 is always open except in special cases.

When the air IN toggle switch 42 of the NC control panel 44 is turned on to float the water of the water tank 10, the air supply solenoid valve 31 is activated by an electric signal, and the air head 33 When the compressed air supplied from the air enters the air tank 11 through the air supply pipeline 20 as shown in FIG. 3B, the compressed air in the air tank 11 gradually rises because the air bubbles rise upward in the water. do.

At this time, the compressed air in the air tank 11 pushes the water in the air tank 11 through the tank lower seal opening and closing passage 16, and thus the initial water level 15 of the water tank side 10 gradually rises. .

In fact, the above process is carried out in an instant, and when it rises to the appropriate level of the upper portion of the material 60, which is the working water level 19 of FIG. 3C, the air supply solenoid valve 31 is turned off by turning off the air IN toggle switch 42 shown in FIG. Shut off the air supply by

At this time, the inside of the air tank 11 is filled with compressed air and the water pushed out of the air tank 11 is to maintain the working water level 19.

When the plasma ignition switch (not shown) of the NC is turned on to perform the plasma cutting operation, air bubbles are generated in the water while the air supplied from the plasma welder is injected instead of the fluid around the nozzle 51 of the torch 50. It can be ignited in water and cut.

The distance between the torch 50 and the material 60 is automatically adjusted even in the water by the sensor, the operation proceeds.

When the plasma cutting operation is completed in water and the air OUT toggle switch 43 of the NC operation panel 44 is turned ON, the air exhaust solenoid valve 32 is opened, and the compressed air in the air tank 11 becomes the water tank valve 10. The compressed air in the air tank 11 passes through the air exhaust pipeline 21 as water is pushed into the air tank 11 through the tank lower seal opening 16. The air is discharged into the atmosphere via the air exhaust solenoid valve 32.

As shown in FIG. 4C, when the water is completely pushed in, all the air is released and the working water level 19 which was injured is returned to the initial water level 15.

In this way, when fully returned, the air OUT toggle switch 43 shown in FIG. 2 is turned OFF to clean the product and the script.

As described above, after working with the present invention, the working environment measurement results show that, as shown in Table 1 below, 601 mg / m 3 of fume was generated in the prior art, but after application of the device of the present invention to 99.2 It can be seen that the effect of%, chromium 100%, UV 100%, noise 85.5% can be achieved.

Table 1 below is a table showing the measurement results and improvement efficiency before and after improvement.

The present invention as described above is submerged in the water and the torch is injured in the cutting process proceeds in the water, so the dust (fume) and heavy metals (chromium (Cr), etc.) that were released into the atmosphere before floating on the water surface in the water It is collected and dropped together with the cutting slag to the bottom of the work table, and ultraviolet rays and noise are absorbed and blocked by water in the water.

In addition, underwater cutting has a very local effect of heat on the part to be cut, so it is not thermally conductive and the material is cooled instantaneously while cutting is progressing, thereby preventing product deformation due to thermal expansion. ..

Claims (1)

A water tank side 10 having a work table 12 installed therein and filled with water; An air tank 11 installed at one end of the lower side of the water tank side of the work table 12 to allow the water in the water tank 10 to rise to the upper portion of the material by air pressure; An air pipeline (20) (21) connected to supply or exhaust compressed air in the air tank (11); Air supply and exhaust solenoid valve 31 for electrically controlling the on and off of the compressed air which is supplied to the air tank 11 through the air pipelines 20 and 21 and vice versa. (32); A loose filter terminal plate (34) for discharging the instantaneous current to the air supply and exhaust solenoid valves (31) (32) to perform operation; Plasma underwater cutting device, characterized in that it comprises a NC operating panel 44 which is connected to the wire of the Loose filter terminal plate 34 to control the opening and closing of the air supply and exhaust solenoid valves 31, 32 .