CN112276290A

CN112276290A - Numerical control cutting machine and cutting method thereof

Info

Publication number: CN112276290A
Application number: CN202011124602.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhaoqing Zhongcai Electromechanical Technology Research and Development Co Ltd
Current assignee: Zhaoqing Zhongcai Electromechanical Technology Research and Development Co Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-29

Abstract

The invention relates to the technical field of mechanical and electrical integration, and discloses a numerical control cutting machine and a cutting method thereof. The invention makes the flow velocity of the cold air above larger than that below through the design of the sudden change air channel with narrow top and wide bottom, and makes the top of the inner cavity of the dust chamber form a low pressure area and the bottom form a high pressure area through the matching of the designed pressure regulating pipe and the air pipe and the flow velocity of the cold air in the sudden change air channel, so that the part of the cold air impacting on the plate diffusing inwards takes away the smoke dust into the dust chamber quickly because of the relation of pressure difference, and the shape design of the designed wind shield and the venturi tube of the dust chamber avoids the rising smoke dust from flowing back into the sudden change air channel.

Description

Numerical control cutting machine and cutting method thereof

Technical Field

The invention relates to the technical field of mechanical and electrical integration, in particular to a numerical control cutting machine and a cutting method thereof.

Background

The numerical control cutting machine is a mechanical and electrical integration cutting machine, and is a machine for blanking raw materials, and the machine can carry out quick cutting with small error on the raw materials, for example, a flame cutting machine for carrying out regular shape cutting on large steel.

But numerical control cutting machine is when carrying out the unloading to raw and other materials, can produce a large amount of high temperature smoke and dust in cutting department, if not in time handle the smoke and dust, not only can cause the harm of health to the workman, still can make the machine deposition, influence the operation of machine, current to the processing of cutting machine dust, adopt large-scale screen panel to cover the machine more, set up the dust absorption mouth in the top, inhale the smoke and dust away, this kind of method coverage is big, lead to the energy resource consumption big, the in-process that the smoke and dust is rising simultaneously, still can depend on the cutting machine, even get into the inside damage that causes the machine of cutting machine.

The other method is to arrange a conical cover above the cutting nozzle to directly suck the smoke dust away from the generation point, but the method can cause the high-temperature smoke dust to pass through the surfaces of the cutting nozzle and the cutting torch, so that the temperature of the materials of the cutting nozzle and the cutting torch is increased, and fuels such as high-pressure oxygen and acetylene in the cutting nozzle and the cutting torch are heated in advance, so that certain danger exists.

Disclosure of Invention

Aiming at the defects of the existing numerical control cutting machine in the use process in the background art, the invention provides the numerical control cutting machine and the cutting method thereof, which have the advantages of quickly taking away high-temperature smoke dust and cooling a cutting torch and an electronic component in real time, and solve the technical problems in the background art.

The invention provides the following technical scheme: a numerical control cutting machine comprises a forward track, the forward track is divided into a left track and a right track, two moving frames are movably connected with the two moving frames symmetrically on the forward track, the moving frames are fixedly provided with two symmetrical beams, one of the moving frames is fixedly connected with an industrial control box, an electronic element is fixedly arranged in the industrial control box, the other moving frame is fixedly connected with a water suction pump, one end of the water suction pump is fixedly connected with a water outlet pipe, two beams are movably provided with symmetrical driving frames, a clamp holder is arranged below the driving frames, one of the driving frames is fixedly provided with an air box, the top end of the other driving frame is fixedly provided with an air suction pump, one end of the air suction pump is fixedly provided with an air inlet pipe, one end of the air box is fixedly provided with an air pipe, and one end of the air pipe is fixedly provided with a cutting, the cutting torch is fixedly installed at the bottom end of the cutting torch, the cutting torch penetrates through and is fixedly sleeved at the center of a dust collection chamber, one end of one of the cross beams is fixedly connected with a water suction pump, one end of the water suction pump is fixedly connected with a water inlet pipe, two groups of symmetrical limiting frames are fixedly connected on opposite surfaces of the two cross beams, movable grooves are formed in the limiting frames, movable rods are clamped in the movable grooves, a spraying cavity fixedly connected with the water inlet pipe is formed in the top of the dust collection chamber, uniformly distributed spraying holes are formed in the bottom of the spraying cavity, a water collecting pool is installed below the spraying cavity, one end of a water outlet pipe penetrates through the dust collection chamber and is fixedly connected with the water collecting pool, an inner cavity and an outer cavity are formed in the dust collection chamber, the outer cavity is an abrupt air passage, a wind shield is fixedly connected to the top end of the inner cavity of the dust, the bottom in equal wind chamber sets up the equal wind hole of equipartition, the fresh air inlet has been seted up to one side of suction chamber, the one end of intake pipe is passed through fresh air inlet and equal wind chamber fixed connection, the air hose is installed to the below of fresh air inlet, the air hose runs through in suction chamber to the inner chamber, run through and the fixed pressure regulating pipe that has cup jointed the equipartition on the inner chamber wall of suction chamber.

Preferably, the gas pipe is a high-pressure oxygen pipe and a fuel pipe, the clamp holder is movably connected with the driving frame through the existing hydraulic mechanism, the clamp holder penetrates through and is fixedly sleeved in the dust collection chamber, and one end of the clamp holder is fixedly connected with the cutting torch.

Preferably, the two ends of the movable rod are fixedly connected with the bottom end of the movable groove through a height spring, the water inlet pipe and the water outlet pipe penetrate through the upper portion of the movable rod, and the water inlet pipe penetrates through the industrial control box and is attached to the lower portion of the electronic element.

Preferably, the sudden change air duct is divided into an upper air duct and a lower air duct from the inflection point, the sectional area of the upper air duct is smaller than that of the lower air duct, and the sectional area of the bottom opening of the lower air duct is the largest.

Preferably, the pressure regulating pipe inclines upwards, and the pressure regulating pipe is divided into two parts about, the opening height of upper portion pressure regulating pipe is close to the central line height of air pipe, the opening height of lower part pressure regulating pipe is higher than the minimum height of deep bead.

Preferably, the dust collection chamber is divided into an upper part and a lower part, the upper part of the dust collection chamber is cylindrical, the lower part of the dust collection chamber is an irregular cone gathered towards the center, and the bottom end of the lower part of the dust collection chamber is cylindrical.

Preferably, the wind shield is away from the inner cavity wall of the dust collection chamber and the water collecting tank, and the openings of the air pipe and the pressure regulating pipe are both located in an inner cavity formed by the wind shield and the dust collection chamber.

A cutting method of a numerical control cutting machine comprises the following cutting steps:

s1, cutting, namely fixing the plate on a cutting machine, inputting a programmed program into an operating system of the cutting machine, calibrating a cutting nozzle, turning on a switch and an auxiliary switch of the cutting machine, enabling a water suction pump, a water suction pump and a suction pump to start working, enabling the cutting nozzle to start cutting the plate, and generating high-temperature smoke;

s2, removing dust, wherein during cutting, cooling water flows through an electronic element through a water inlet pipe and then flows into a spraying cavity, cold air impacts a plate through a sudden change air channel to form a fan cover, heat exchange is carried out between high-temperature smoke dust and surrounding cold air, the air pipe enables air in an inner cavity formed between the inner cavity wall of a dust suction chamber and a wind shield to be balanced with the outside, an upper and lower pressure difference is formed between the air pipe and the differential cold air in the sudden change air channel through a pressure regulating pipe, the high-temperature smoke dust is rapidly sent into the dust suction chamber under the influence of the cold air and the pressure difference and continuously upwards accumulated in the inner cavity formed between the dust suction chamber and the wind shield, and water continuously falling from the spraying cavity absorbs the accumulated high-temperature smoke dust and falls into a water collecting pool, so that;

and S3, cooling, wherein after the plate is cut, the cutting machine resets and stops running, the air suction pump, the water suction pump and the water suction pump still run for a period of time, so that cold air cools the cutting nozzle, upward force is provided for unabsorbed smoke dust, the smoke dust is completely absorbed by water and is pumped away by the water suction pump, and after the sewage in the water outlet pipe is clean, all power supplies are disconnected, so that the cutting machine waits for the next running.

The invention has the following beneficial effects:

1. according to the invention, through the designed abrupt air channel, cold air is sprayed out of the air channel to form the air cover with the plate on the periphery of the cutting nozzle, so that the diffusion of high-temperature smoke dust is blocked, meanwhile, the cold air exchanges heat with the high-temperature smoke dust to primarily cool the high-temperature smoke dust, and when the cold air impacts steel, the cold air can diffuse towards the inside and the outside, so that the cold air diffused inside collides and rises, the high-temperature smoke dust is upwards brought into the inner cavity of the dust suction chamber, and meanwhile, the cold air can rapidly cool the cutting nozzle after the cutting is finished.

2. The invention makes the flow velocity of the cold air above larger than that below through the design of the sudden change air channel with narrow top and wide bottom, and makes the top of the inner cavity of the dust chamber form a low pressure area and the bottom form a high pressure area through the matching of the designed pressure regulating pipe and the air pipe and the flow velocity of the cold air in the sudden change air channel, so that the part of the cold air impacting on the plate diffusing inwards takes away the smoke dust into the dust chamber quickly because of the relation of pressure difference, and the shape design of the designed wind shield and the venturi tube of the dust chamber avoids the rising smoke dust from flowing back into the sudden change air channel.

3. The invention can lead cooling water to flow into the spraying cavity of the dust absorption chamber after cooling the electronic components in the industrial control box through the designed water pipeline system, absorb high-temperature smoke dust and discharge the smoke dust through the water discharge pipe, and the falling water can cool the cutting torch, keep the temperature of the gas in the cutting torch stable and avoid the occurrence of accidents,

drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the movable rod structure of the present invention;

FIG. 3 is a schematic view of the dust collection chamber according to the present invention;

fig. 4 is a front sectional schematic view of the structure of the dust collection chamber.

In the figure: 1. a forward track; 2. a movable frame; 3. a cross beam; 4. an industrial control box; 401. an electronic component; 5. driving the frame; 501. a gas tank; 502. an air tube; 6. a holder; 7. a getter pump; 8. an air inlet pipe; 9. cutting a torch; 10. cutting a nozzle; 11. a dust collection chamber; 12. a water suction pump; 13. a water inlet pipe; 14. a water pump; 15. a water outlet pipe; 16. a limiting frame; 17. a movable rod; 18. a height spring; 19. an air tube; 20. a spray chamber; 21. a water collecting tank; 22. a wind deflector; 23. a wind equalizing cavity; 24. air equalizing holes; 25. an air inlet hole; 26. sudden change of air ducts; 27. and (5) a pressure regulating pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a numerical control cutting machine includes a forward rail 1, the forward rail 1 is divided into two parts, namely a left part and a right part, two symmetrical moving frames 2 are movably connected to the two forward rails 1, two symmetrical beams 3 are fixedly mounted on the moving frames 2, an industrial control box 4 is fixedly connected to one moving frame 2, an electronic component 401 is fixedly mounted in the industrial control box 4, a water pump 14 is fixedly connected to the other moving frame 2, a water outlet pipe 15 is fixedly connected to one end of the water pump 14, symmetrical driving frames 5 are movably mounted on the two beams 3, a clamp holder 6 is mounted below the driving frames 5, an air box 501 is fixedly mounted at the top end of one driving frame 5, an air suction pump 7 is fixedly mounted at the top end of the other driving frame 5, an air inlet pipe 8 is fixedly mounted at one end of the air suction pump 7, an air pipe 502 is fixedly mounted at one end, a cutting torch 9 is fixedly arranged at one end of the gas pipe 502, a cutting nozzle 10 is fixedly arranged at the bottom end of the cutting torch 9, the cutting torch 9 penetrates through and is fixedly sleeved at the center of the dust chamber 11, a water suction pump 12 is fixedly connected at one end of one of the beams 3, a water inlet pipe 13 is fixedly connected at one end of the water suction pump 12, two sets of symmetrical limiting frames 16 are fixedly connected on opposite surfaces of the two beams 3, a movable groove is formed in each limiting frame 16, a movable rod 17 is clamped in each movable groove, a spraying cavity 20 fixedly connected with the water inlet pipe 13 is formed in the top of the dust chamber 11, uniformly distributed spraying holes are formed in the bottom of each spraying cavity 20, a water collecting tank 21 is arranged below each spraying cavity 20, one end of a water outlet pipe 15 penetrates through the dust chamber 11 and is fixedly connected with the water collecting tank 21, an inner cavity and an outer cavity are formed in the dust chamber 11, the outer cavity, an air equalizing cavity 23 is formed above the sudden change air duct 26, evenly distributed air equalizing holes 24 are formed in the bottom of the air equalizing cavity 23, an air inlet hole 25 is formed in one side of the dust collection chamber 11, one end of the air inlet pipe 8 is fixedly connected with the air equalizing cavity 23 through the air inlet hole 25, an air pipe 19 is installed below the air inlet hole 25, the air pipe 19 penetrates through the dust collection chamber 11 to the inner cavity, and evenly distributed pressure regulating pipes 27 are fixedly sleeved and penetrated on the inner cavity wall of the dust collection chamber 11.

The air pipe 502 is a high-pressure oxygen pipe and a fuel pipe, the clamp holder 6 is movably connected with the driving frame 5 through the existing hydraulic mechanism, the clamp holder 6 penetrates through and is fixedly sleeved in the dust chamber 11, one end of the clamp holder 6 is fixedly connected with the cutting torch 9, so that the two driving frames 5 can simultaneously drive the dust chamber 11 to operate, the dust chamber 11 can be synchronously adjusted with the cutting nozzle 10, the relative position is always kept inconvenient, and meanwhile, the clamp holder 6 also ensures the stability of the dust chamber 11.

Wherein, both ends of the movable rod 17 are fixedly connected with the bottom end of the movable groove through a height spring 18, the water inlet pipe 13 and the water outlet pipe 15 both penetrate through the upper part of the movable rod 17, the water inlet pipe 13 penetrates through the industrial control box 4 and is adhered to the lower part of the electronic element 401, so that the water inlet pipe 13 can firstly carry out cooling treatment on the electronic element 401 and then flows to the spraying cavity 20, the connection design of the movable rod 17 and the position relation design of the water inlet pipe and the water outlet pipe ensure that when the dust chamber 11 is close to the limiting frame 16, the pressure of the water pipe to the movable rod 17 becomes small, so that the height spring 18 drives the movable rod 17 to rise, the water pipe is prevented from falling to a lower plate, or the dust accumulated on the moving path of the dust chamber 11, when the dust chamber 11 is far away from the limiting frame 16, the pressure of the water pipe on the movable rod 17 is increased, so that the height spring 18 drives the movable rod 17 to descend, and the water pipe can move forward along with the dust collection chamber 11.

The abrupt air duct 26 is divided into an upper air duct and a lower air duct from the inflection point, the sectional area of the upper air duct is smaller than that of the lower air duct, the bottom opening of the lower air duct has the largest sectional area, and the sectional areas of the upper air duct and the lower air duct are different, so that the cold air in the upper air duct flows fast, the pressure around the upper air duct is small, the cold air in the lower air duct flows slow, the pressure around the lower air duct is large, and the pressure difference is formed around the upper air duct and the lower air duct.

Wherein, the pressure regulating pipe 27 is inclined upwards, and the pressure regulating pipe 27 is divided into an upper part and a lower part, the opening height of the upper pressure regulating pipe 27 is close to the central line height of the air pipe 19, the opening of the lower pressure regulating pipe 27 is higher than the lowest point of the wind shield 22, the air entering the air pipe 19 is matched with the cold air of the upper air channel through the pressure regulating pipe 27, the inner cavity formed by the dust suction chamber 11 and the wind shield 22 around the upper pressure regulating pipe 27 becomes a low pressure area, the inner cavity formed by the dust suction chamber 11 and the wind shield 22 around the lower pressure regulating pipe 27 forms a high pressure area, the cold air which is collided and gathered inwards on the plate can be influenced by the pressure difference, the high temperature smoke dust is rapidly brought to the dust suction chamber 11, meanwhile, the position design of the lower pressure regulating pipe 27 ensures that the rising force of the cold air and the pressure influence in the inner cavity can not enter the inner cavity formed by the wind shield, the possibility of high temperature soot flowing back from the pressure regulating tube 27 is avoided.

Wherein, the dust collecting chamber 11 is divided into an upper part and a lower part, the upper part of the dust collecting chamber 11 is cylindrical, the lower part of the dust collecting chamber 11 is an irregular cone gathered towards the center, and the bottom end of the lower part of the dust collecting chamber 11 is cylindrical, so that the dust collecting chamber 11 is venturi-like, so that the high-temperature smoke is influenced by the shape of the bottom end of the dust collecting chamber 11 in the ascending process, the upward movement direction is kept, when the smoke reaches the inner cavity opening formed by the wind shield 22 and the inner wall of the dust collecting chamber 11, the ascending smoke can be influenced by the jacking force of cold air and the pressure at the inner cavity opening at the same time, so that the smoke has an inward movement trend, and the smoke is prevented from flowing back into the sudden change air duct through the pressure.

Wherein, there is the distance in deep cavity wall and the catch basin 21 of deep bead 22 and suction chamber 11, the opening of air hose 19 and pressure regulating pipe 27 all is located deep bead 22 and the inner chamber that the suction chamber 11 formed, deep bead 22's position design makes the smoke and dust of retrieving gather like the top in catch basin 21, make the smoke and dust can be by spraying the spun water absorption in the chamber 20 in a large scale, deep bead 22 and the inner chamber that the suction chamber 11 formed simultaneously, provide the place for the formation of pressure differential, the smoke and dust backward flow has also been avoided like sudden change wind channel 26.

s1, cutting, namely fixing the plate on a cutting machine, inputting a programmed program into an operating system of the cutting machine, calibrating the cutting nozzle 10, turning on a switch and an auxiliary switch of the cutting machine, enabling the water suction pump 12, the water suction pump 14 and the air suction pump 7 to start working, enabling the cutting nozzle 10 to start cutting the plate, and generating high-temperature smoke;

s2, dust removal, wherein during cutting, cooling water flows through the electronic component 401 through the water inlet pipe 13 and then flows into the spraying cavity 20, cold air collides with a plate through the sudden change air duct 26 to form a fan cover, at the moment, high-temperature smoke dust exchanges heat with surrounding cold air, at the moment, air in an inner cavity formed between the inner cavity wall of the dust chamber 11 and the wind shield 22 is balanced with the outside through the air pipe 19, an up-down pressure difference is formed between the pressure regulating pipe 27 and the differential cold air in the sudden change air duct 26, so that the high-temperature smoke dust is quickly sent into the dust chamber 11 under the influence of the cold air and the pressure difference and continues to be accumulated upwards in the inner cavity formed between the dust chamber 11 and the wind shield 22, at the moment, water continuously falling from the spraying cavity 20 absorbs the accumulated high-temperature smoke dust and falls into the water collecting tank 21, and the;

and S3, cooling, wherein after the plate is cut, the cutting machine resets and stops running, the air suction pump 7, the water suction pump 12 and the water suction pump 14 still run for a period of time, so that cold air cools the cutting nozzle 10, upward force is provided for the smoke dust which is not absorbed, the smoke dust is completely absorbed by water and is pumped away by the water suction pump 14, and after the sewage in the water outlet pipe 15 looks clean, all power supplies are disconnected, so that the cutting machine waits for the next running.

The use method (working principle) of the invention is as follows:

firstly, fixing a plate on a cutting table of a cutting machine, inputting a programmed program into an operating system, debugging the machine, calibrating a cutting nozzle 10, opening a switch to enable the cutting machine to start to operate, simultaneously opening switches of a water suction pump 12, a water suction pump 14 and a suction pump 7, enabling a water inlet pipe 13 to be filled with water, enabling the water to flow through an industrial control box 4, flowing into a spraying cavity 20, falling to a water collecting tank 21, enabling cold air to enter a sudden change air duct 26 and impacting downwards on the plate to form a fan cover, enabling the inner cavity wall of a dust suction chamber 11 and an inner cavity formed by a wind shield 22 to be located at the position of a pressure adjusting pipe 27 to form an upper-lower pressure difference under the influence of the cold air flow rate and an air pipe 19, and enabling the cutting nozzle 10 to start to cut the plate;

then, the high-temperature smoke dust generated by cutting firstly exchanges heat with the surrounding cold air, and is quickly sent into the dust collection chamber 11 under the influence of the cold air and pressure difference, and continuously accumulates upwards in an inner cavity formed by the dust collection chamber 11 and the wind shield 22, and at the moment, the water continuously falling in the spraying cavity 20 absorbs the high-temperature smoke dust, falls into the water collection tank 21, and is then pumped away by the water pump 14 through the water outlet pipe 15;

finally, after the plate is cut, the cutting machine is reset according to the program and stops running, at the moment, the air suction pump 7, the water suction pump 12 and the water suction pump 14 still run for a period of time, so that cold air cools the cutting nozzle 10, upward force is provided for the smoke dust which is not absorbed, the smoke dust is completely absorbed by water and is pumped away by the water suction pump 14, and after the sewage in the water outlet pipe 15 is seen to be clean, all power supplies are disconnected, and the cutting machine waits for the next running.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a numerical control cutting machine, includes track (1) that advances, its characterized in that: the utility model discloses a rail vehicle is characterized in that antegoing track (1) divide into about two, two the removal frame (2) of swing joint two symmetries is gone up in antegoing track (1), move and to go up fixed mounting on frame (2) and have crossbeam (3) of two symmetries, fixedly connected with industry control case (4) on one of them removal frame (2), fixed mounting has electronic component (401) in industry control case (4), and fixedly connected with suction pump (14) are gone up on another removal frame (2), the one end fixedly connected with outlet pipe (15) of suction pump (14), two equal movable mounting has symmetrical drive frame (5) on crossbeam (3), holder (6) are installed to the below of drive frame (5), one of them the top fixed mounting of drive frame (5) has gas tank (501), and the top fixed mounting of another drive frame (5) has suction pump (7), the cutting torch is characterized in that an air inlet pipe (8) is fixedly mounted at one end of an air suction pump (7), an air pipe (502) is fixedly mounted at one end of an air box (501), a cutting torch (9) is fixedly mounted at one end of the air pipe (502), a cutting nozzle (10) is fixedly mounted at the bottom end of the cutting torch (9), the cutting torch (9) penetrates through and is fixedly sleeved at the center of a dust suction chamber (11), one end of a cross beam (3) is fixedly connected with a water suction pump (12), one end of the water suction pump (12) is fixedly connected with an inlet pipe (13), two opposite faces of the cross beam (3) are fixedly connected with two groups of symmetrical limiting frames (16), a movable groove is formed in each limiting frame (16), a movable rod (17) is clamped in the movable groove, a spray cavity (20) fixedly connected with the inlet pipe (13) is formed in the top of the dust suction, and the bottom of the spraying cavity (20) is provided with uniformly distributed spraying holes, a water collecting tank (21) is arranged below the spraying cavity (20), one end of the water outlet pipe (15) penetrates through the dust collection chamber (11) and is fixedly connected with the water collecting tank (21), the dust collection chamber (11) is provided with an inner cavity and an outer cavity, the outer cavity is a sudden change air channel (26), the top end of the inner cavity of the dust collection chamber (11) is fixedly connected with a wind shield (22), an air equalizing cavity (23) is arranged above the sudden change air channel (26), uniformly distributed air equalizing holes (24) are arranged at the bottom of the air equalizing cavity (23), one side of the dust collection chamber (11) is provided with air inlet holes (25), one end of the air inlet pipe (8) is fixedly connected with the air equalizing cavity (23) through the air inlet holes (25), an air pipe (19) is arranged below the air inlet holes (25), and the air pipe (19) penetrates through the dust collection chamber (11) to the, the inner cavity wall of the dust collection chamber (11) is penetrated and fixedly sleeved with uniformly distributed pressure regulating pipes (27).

2. A numerical control cutting machine according to claim 1, characterized in that: the gas pipe (502) is a high-pressure oxygen pipe and a fuel pipe, the clamp holder (6) is movably connected with the driving frame (5) through the existing hydraulic mechanism, the clamp holder (6) penetrates through and is fixedly sleeved in the dust absorption chamber (11), and one end of the clamp holder (6) is fixedly connected with the cutting torch (9).

3. A numerical control cutting machine according to claim 1, characterized in that: the bottom fixed connection in high spring (18) and activity groove is passed through at the both ends of movable rod (17), inlet tube (13) all pass from the top of movable rod (17) with outlet pipe (15), inlet tube (13) run through industry control box (4) and paste and in electronic component (401) below.

4. The numerical control cutting machine and the cutting method thereof according to claim 1, characterized in that: the sudden change air duct (26) is divided into an upper air duct and a lower air duct from the inflection point, the sectional area of the upper air duct is smaller than that of the lower air duct, and the sectional area of the bottom opening of the lower air duct is the largest.

5. A numerical control cutting machine according to claim 1, characterized in that: the pressure regulating pipe (27) inclines upwards, the pressure regulating pipe (27) is divided into an upper part and a lower part, the opening height of the upper pressure regulating pipe (27) is close to the height of the central line of the air pipe (19), and the opening of the lower pressure regulating pipe (27) is higher than the lowest point of the wind shield (22).

6. A numerical control cutting machine according to claim 1, characterized in that: the dust collection chamber (11) is divided into an upper part and a lower part, the upper part of the dust collection chamber (11) is cylindrical, the lower part of the dust collection chamber (11) is an irregular cone gathered towards the center, and the bottom end of the lower part of the dust collection chamber (11) is cylindrical.

7. A numerical control cutting machine according to claim 1, characterized in that: the wind shield (22) is far away from the inner cavity wall of the dust collection chamber (11) and the water collecting tank (21), and the openings of the air pipe (19) and the pressure regulating pipe (27) are both located in an inner cavity formed by the wind shield (22) and the dust collection chamber (11).

8. The cutting method of the numerical control cutting machine according to claim 1, characterized by comprising the following cutting steps:

s1, cutting, namely fixing the plate on a cutting machine, inputting a programmed program into an operating system of the cutting machine, calibrating a cutting nozzle (10), turning on a switch and an auxiliary switch of the cutting machine, enabling a water suction pump (12), a water suction pump (14) and an air suction pump (7) to start to work, enabling the cutting nozzle (10) to start to cut the plate, and generating high-temperature smoke;

s2, removing dust, wherein during cutting, cooling water flows through the electronic component (401) through the water inlet pipe (13) and then flows into the spraying cavity (20), cold air collides with the plate through the sudden change air duct (26) to form a fan cover, at the moment, high-temperature smoke dust and surrounding cold air exchange heat, at the moment, the air pipe (19) enables air in an inner cavity formed between the inner cavity wall of the dust suction chamber (11) and the wind shield (22) to be balanced with the outside, the pressure regulating pipe (27) and the differential cold air in the sudden change air duct (26) form an up-down pressure difference, so that the high-temperature smoke dust is quickly sent into the dust collection chamber (11) under the influence of the cold air and the pressure difference, and continuously accumulated upwards in an inner cavity formed by the dust collection chamber (11) and the wind shield (22), at the moment, the water continuously falling in the spraying cavity (20) absorbs the accumulated high-temperature smoke dust and falls into a water collecting tank (21), so that the water suction pump (14) pumps the sewage away through a water outlet pipe (15);

and S3, cooling, wherein after the plate is cut, the cutting machine is reset and stops running, at the moment, the air suction pump (7), the water suction pump (12) and the water suction pump (14) still run for a period of time, so that cold air cools the cutting nozzle (10), meanwhile, upward force is provided for unabsorbed smoke dust, the smoke dust is completely absorbed by water and is pumped away by the water suction pump (14), and when the sewage in the water outlet pipe (15) looks clean, all power supplies are disconnected, so that the cutting machine waits for the next running.