A laser pipe cutting machine with a cooling system

Abstract

The application discloses a laser pipe cutting machine with a cooling system, the outer side of a laser cutting head is sleeved with a heat dissipation sleeve, the heat dissipation sleeve is internally provided with an inner water cavity and an outer water cavity in communication, the two water cavities are both provided with cold air pipelines, the bottom of the heat dissipation sleeve is connected with a gas blowing box, the bottom of the gas blowing box is connected with a sleeve ring which is sleeved on the lower part of the laser cutting head, and a cold water cavity is formed in the sleeve ring; a fixing seat is mounted on the outer side wall of a front chuck, and the inner ring of the fixing seat is provided with a water bag for cooling the pipe; in the application, cold air is blown downward after cooling the water body to scatter the hot air flow generated in cutting, and the hot interference is reduced; the outer water cavity accurately controls the water flow direction through the inflation amount of the air bag, and a closed circulation of 'extrusion-cooling-reflux-mixing' is formed, so that the cutting head is always kept in a low-temperature working state, the equipment life is prolonged, and the cutting stability is improved; the cutting hardening and oxidation problems of metal pipe materials such as stainless steel and aluminum alloy are effectively reduced, the heat affected zone is reduced, and the cutting quality is improved.

Description

Technical Field

[0001] This invention relates to the field of laser tube cutting machine technology, specifically to a laser tube cutting machine with a cooling system. Background Technology

[0002] A laser tube cutting machine is a high-precision tube cutting device based on laser processing technology, mainly used for the automated cutting of metal or non-metal tubes. Its core principle is to focus a high-power laser beam into an extremely small spot (diameter ≤ 0.2mm), locally heating the tube to a vaporized or molten state. Simultaneously, auxiliary gases (such as oxygen or nitrogen) are used to blow away the molten slag, achieving rapid tube cutting. This equipment can process various cross-sectional shapes, including round, square, rectangular, and irregularly shaped tubes, and is widely used in machinery manufacturing, aerospace, automotive, medical device, and architectural decoration industries.

[0003] Existing equipment faces the following problems during pipe cutting: The laser cutting head generates a lot of heat when operating at high power. If heat dissipation is not timely, it can easily lead to aging of internal components of the cutting head, decreased precision, or even equipment failure. The high temperature generated during the cutting process can cause problems such as material hardening, oxidation, or deformation near the pipe cut, forming a large heat-affected zone, which affects the cutting quality and subsequent processing performance of the pipe. In addition, the upward hot airflow generated during cutting will carry heat back to the cutting head, further aggravating the temperature rise of the cutting head.

[0004] Chinese patent CN115476057A discloses a cooling laser cutting head, including a cutting head body and an external water-cooling jacket. The water-cooling jacket consists of an inner water-cooling jacket and an outer water-cooling jacket, both of which are annular hollow structures. Their upper ends are connected by annular water channels. The inner water-cooling jacket is embedded in an annular groove. An inlet pipe is located at the upper end of the water-cooling jacket, and an outlet pipe is located at the lower end. The inlet pipe is connected to a cooling water source. A spiral-structured outer channel is formed on the outer side of the outer water-cooling jacket. This invention, by using a water-cooling jacket and an air-cooling jacket, can provide both water and air cooling for the laser cutting head. These two systems complement each other, improving cooling efficiency, ensuring a constant temperature for the laser cutting head during operation, and improving cutting quality. However, in this application, the water cooling path is fixed, resulting in insufficient circulation efficiency and heat exchange capacity. The air cooling and water cooling systems lack synergy, are not linked with the water cooling system, have low cooling capacity utilization, and the cooling system has a single function, lacking coordinated cooling of the tubing. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the above-mentioned background art by providing a laser tube cutting machine with a cooling system to solve the cooling problem of the laser cutting head and the tube.

[0006] The present invention achieves the above-mentioned objectives through the following technical solution: A laser tube cutting machine with a cooling system includes a worktable and a front chuck and a rear chuck respectively disposed at the front and rear ends of the worktable. A movable cutting assembly is provided on the upper side of the front chuck. The movable cutting assembly includes a laser cutting head. A heat dissipation kit is sleeved on the outer side of the laser cutting head. The heat dissipation kit has an inner water cavity and an outer water cavity that communicate with each other. Both water cavities are provided with cold air pipes for reducing water temperature. An air blowing box is connected to the bottom of the heat dissipation kit. The cold air cools the water in the two water cavities and then flows into the air blowing box, and then blows downward to disperse the hot air flow generated by cutting. A collar fitted on the lower part of the laser cutting head is connected to the bottom of the air blowing box. A cold water cavity is opened in the collar. A fixing seat is installed on the outer wall of the front chuck. A water bladder for cooling the tube is provided in the inner ring of the fixing seat. An air bladder is installed in the outer water cavity. The outer water cavity is connected to the cold water cavity and the water bladder through pipes respectively.

[0007] When the airbag is filled with air at intervals equal to 1 / 3 and 2 / 3 of the capacity of the outer water cavity, the cooling water in the outer water cavity will circulate within the outer water cavity, the cold water cavity, and the waterbag.

[0008] Furthermore, the heat dissipation kit is provided with heat-conducting rings close to the outer side of the laser cutting head from the inside out. One side of the heat-conducting ring is provided with a partition for separating the inner water cavity and the outer water cavity. The top of the partition is provided with a through-hole for connecting the inner water cavity and the outer water cavity. One side of the partition is the outer ring wall of the heat dissipation kit.

[0009] Furthermore, the capacity of the outer water cavity is greater than the capacity of the inner water cavity, and the capacities of the cold water cavity and the water bladder are both 1 / 3 of the capacity of the outer water cavity.

[0010] Furthermore, the water bladder comprises an inner metal foil and an outer silicone rubber, wherein the metal foil and the silicone rubber are bonded together by an adhesive to form a metal foil-rubber sandwich structure.

[0011] Furthermore, a spiral first cold air pipe is provided on the outer side of the heat-conducting ring, and a spiral second cold air pipe is provided on the outer side of the partition. The air inlet ends of the first and second cold air pipes extend through the top of the heat dissipation kit, while the tail ends extend through the bottom of the heat dissipation kit and into the air blowing box.

[0012] Furthermore, the airbag is two arc-shaped sub-airbags symmetrically installed on the bottom surface of the outer water cavity, and the bottom of the heat dissipation kit is symmetrically equipped with bidirectional air pumps that are respectively connected to the two sub-airbags.

[0013] Furthermore, the outer water chamber and the cold water chamber are connected by a first pipeline and a second pipeline, respectively. A first check valve is provided at the bottom of the outer water chamber, and one end of the first pipeline is connected to the first check valve. A first water pump for transporting water from the cold water chamber back to the outer water chamber is installed on the second pipeline.

[0014] Furthermore, the outer water cavity and the water bladder are connected by a third pipe and a fourth pipe, respectively. A second one-way valve is provided at the bottom of the outer water cavity, and one end of the third pipe is connected to the second one-way valve. A second water pump for transporting water from the water bladder back to the outer water cavity is installed on the fourth pipe.

[0015] Furthermore, the bottom edge of the air-blowing box is provided with multiple air-blowing holes.

[0016] Furthermore, a through channel is formed inside the fixed base, and the water bladder is installed inside the through channel. After being filled with water, the water bladder adheres tightly to the outer surface of the pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The inner water chamber is close to the cutting head, directly absorbing core heat; the outer water chamber further stores heat through a larger volume of water, and together with the spiral first and second cooling air pipes that introduce cooling air, the water temperature is reduced twice, keeping the cutting head in a low-temperature operating state, extending equipment life and improving cutting stability. After cooling the water, the cooling air flows into the air blowing box, and blows the hot air generated by cutting downwards through the air blowing holes on the bottom edge, forming a three-dimensional heat dissipation network of "water cooling + air cooling", preventing hot air from rushing back to the cutting head and reducing thermal interference.

[0019] 2. A water bladder is installed inside the fixing seat on the outside of the front chuck. It employs a sandwich structure of metal foil (copper / aluminum foil) and silicone rubber. The inner metal foil has high thermal conductivity, while the outer silicone rubber is elastic and heat-resistant. After being filled with water, the water bladder adheres tightly to the outer surface of the pipe, pre-cooling the area to be cut before cutting and absorbing heat in real time during the cutting process. This effectively reduces the hardening and oxidation problems of cut edges on stainless steel, aluminum alloy, and other metal pipes, shrinks the heat-affected zone, and improves cut quality. In conjunction with the back-and-forth movement of the pipe, the water bladder can dynamically wrap around the cutting area, achieving "moving cooling" and avoiding localized overheating caused by continuous cutting. This is especially suitable for the continuous processing of long pipes.

[0020] 3. The water flow direction in the outer water chamber is precisely controlled by the inflation volume of the air bladder (1 / 3 to 2 / 3 of its capacity): When the air bladder is inflated, the water pressure pushes the cooling water in the outer water chamber into the cold water chamber and the water bladder sequentially; when the air bladder is deflated, the heated water is returned to the outer water chamber by the first and second water pumps, mixing with the water in the inner water chamber through the through-hole. The rapid expansion / contraction of the air bladder stirs and cools the water, forming a closed-loop cycle of "compression-cooling-return-mixing". This design eliminates the need for a complex pumping system, achieving automatic water flow switching solely through changes in air bladder volume and a one-way valve. It boasts low energy consumption and high circulation efficiency, while avoiding the clogging or backflow problems that can occur with traditional water pumps. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the heat dissipation kit and water bladder in this invention;

[0023] Figure 3 This is a schematic diagram of the heat dissipation kit and water bladder in this invention;

[0024] Figure 4 This is a top view of the heat dissipation kit in this invention;

[0025] Figure 5 for Figure 4 Sectional view of AA;

[0026] Figure 6 for Figure 4 Sectional view of BB;

[0027] Figure 7 This is a schematic diagram of the interior of the heat dissipation kit in this invention;

[0028] Figure 8 This is a schematic diagram of the bottom of the air-blowing box in this invention.

[0029] In the diagram: 1-Workbench, 2-Laser cutting head, 3-Heat dissipation kit, 4-Inner water cavity, 5-Outer water cavity, 6-Air blowing box, 7-Loop ring, 8-Fixing seat, 9-Water bladder, 10-Air bladder, 11-First cold air pipe, 12-Second cold air pipe, 13-First pipeline, 14-Second pipeline, 15-First one-way valve, 16-First water pump, 17-Third pipeline, 18-Fourth pipeline, 19-Second one-way valve, 20-Second water pump, 31-Heat conduction ring, 32-Baffle plate, 71-Cold water cavity, 101-Air bladder, 102-Two-way air pump, 321-Through port. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Combination Figures 1 to 8 The laser tube cutting machine with a cooling system shown includes a worktable 1 and a front chuck and a rear chuck respectively located at the front and rear ends of the worktable 1. A moving cutting assembly is provided on the upper side of the front chuck. The moving cutting assembly includes a laser cutting head 2, and a heat dissipation kit 3 is fitted around the outside of the laser cutting head 2. The heat dissipation kit 3 has an inner water cavity 4 and an outer water cavity 5 that communicate with each other. Both water cavities are equipped with cooling air pipes for lowering the water temperature. An air blowing box 6 is connected to the bottom of the heat dissipation kit 3. The cooling air cools the water in the two water cavities and then flows into the air blowing box 6, subsequently blowing downwards to disperse the water produced during cutting. The hot airflow is generated; the bottom of the air box 6 is connected to a collar 7 that is fitted onto the lower part of the laser cutting head 2, and a cold water chamber 71 is opened inside the collar 7; a fixing seat 8 is installed on the outer wall of the front chuck, and a water bladder 9 for cooling the pipe is set in the inner ring of the fixing seat 8; an air bladder 10 is installed in the outer water chamber 5, and the outer water chamber 5 is connected to the cold water chamber 71 and the water bladder 9 through pipes respectively; when the air bladder 10 is filled with air at intervals equal to 1 / 3 and 2 / 3 of the capacity of the outer water chamber 5, the cooling water in the outer water chamber 5 will circulate in the outer water chamber 5, the cold water chamber 71 and the water bladder 9.

[0033] like Figures 5-7As shown, the heat dissipation kit 3 is provided with heat-conducting rings 31 close to the outer side of the laser cutting head 2 from the inside out. One side of the heat-conducting ring 31 is provided with a partition 32 for separating the inner water cavity 4 and the outer water cavity 5. The top of the partition 32 is provided with a through-hole 321 for connecting the inner water cavity 4 and the outer water cavity 5. One side of the partition 32 is the outer ring wall of the heat dissipation kit 3. The outer side of the heat-conducting ring 31 is provided with a spiral first cold air pipe 11, and the outer side of the partition 32 is provided with a spiral second cold air pipe 12. The air inlet ends of the first cold air pipe 11 and the second cold air pipe 12 extend through and out of the top of the heat dissipation kit 3, while the tail ends extend through the bottom of the heat dissipation kit 3 and into the air blowing box 6. Multiple air blowing holes are provided around the bottom edge of the air blowing box 6.

[0034] In use, an external air cooler is connected to the first air cooler pipe 11 and the second air cooler pipe 12 to deliver cool air. During the delivery of cool air, the cool air in the first air cooler pipe 11 cools the water in the inner water cavity 4. The cooling effect of the cooling water in the inner water cavity 4 is enhanced by the pipe wall of the first air cooler pipe 11 close to the heat conduction ring 31. Meanwhile, the cool air in the second air cooler pipe 12 cools the water in the outer water cavity 5. Subsequently, the cool air in the first air cooler pipe 11 and the second air cooler pipe 12 flows into the air blowing box 6. Then, the cool air is blown downward from the multiple air blowing holes opened around the bottom edge of the air blowing box 6 to disperse the upward hot air flow generated by cutting, reduce the heat impact of the upward hot air flow on the cutting head, and allow the laser cutting head 2 to achieve cooling without relying solely on cooling water.

[0035] like Figures 2-7 As shown, the airbag 10 consists of two arc-shaped sub-airbags 101 symmetrically installed on the bottom surface of the outer water cavity 5. A bidirectional air pump 102, connected to the two sub-airbags 101 respectively, is symmetrically installed on the bottom of the heat dissipation kit 3. The outer water cavity 5 and the cold water cavity 71 are connected by a first pipe 13 and a second pipe 14 respectively. A first one-way valve 15 is provided at the bottom of the outer water cavity 5, and one end of the first pipe 13 is connected to the first one-way valve 15. A first water pump 16 for transporting water from the cold water cavity 71 back to the outer water cavity 5 is installed on the second pipe 14. The outer water cavity 5 and the water bag 9 are connected by a third pipe 17 and a fourth pipe 18 respectively. A second one-way valve 19 is provided at the bottom of the outer water cavity 5, and one end of the third pipe 17 is connected to the second one-way valve 19. A second water pump 20 for transporting water from the water bag 9 back to the outer water cavity 5 is installed on the fourth pipe 18.

[0036] In addition, the capacity of the outer water cavity 5 is greater than that of the inner water cavity 4, and the capacities of the cold water cavity 71 and the water bladder 9 are both 1 / 3 the capacity of the outer water cavity 5; when the cooling water flows in a circulation among the outer water cavity 5, the cold water cavity 71, and the water bladder 9:

[0037] S1: Initially (airbag 10 is in its initial contracted state), the water cavity of the heat dissipation kit 3 is filled with water. Under the supply of cold air from the first cold air pipe 11 and the second cold air pipe 12, the water temperature in the entire cavity drops. Then, the airbag 10 is inflated, and the air volume is 1 / 3 of the capacity of the outer water cavity 5. With the water pressure and the first one-way valve 15 open, 1 / 3 of the water in the outer water cavity 5 enters the cold water cavity 71, which has a capacity of 1 / 3 of the outer water cavity 5, through the first one-way valve 15 and the first pipe 13. Thus, the cooling water in the cold water cavity 71 cools the lower part of the laser cutting head 2. Then, the next operation can be controlled by measuring the water level or setting the time required for inflation and water expulsion.

[0038] S2: Next, the airbag 10 is inflated again, and the air volume reaches 2 / 3 of the capacity of the outer water chamber 5. With the water pressure and the second one-way valve 19 open, another 1 / 3 of the water in the outer water chamber 5 enters the waterbag 9, which has a capacity of 1 / 3 of the outer water chamber 5, through the second one-way valve 19 and the third pipe 17. Thus, the waterbag 9 conducts the low temperature to the surface of the pipe being cut through heat conduction. In order to prevent the water in the waterbag 9 from flowing back into the outer water chamber 5 when it is squeezed by the pipe, another one-way valve can be installed at the connection between the third pipe 17 and the waterbag 9.

[0039] S3: Next, the cold water chamber 71 conducts heat due to contact with the lower part of the laser cutting head 2, so that while the laser cutting head 2 cools down, the water temperature inside it rises. Then, the first water pump 16 is started, and the water in the cold water chamber 71 is transported back to the outer water chamber 5 through the first water pump 16 and the second pipeline 14. At this time, the outer water chamber 5 has 2 / 3 of the water volume. Then, the two bidirectional air pumps 102 rapidly inflate and de-inflate the two air bags 101 respectively, with the air volume being 1 / 3 of the capacity of the outer water chamber 5. Since the top of the partition 32 between the inner water chamber 4 and the outer water chamber 5 has a through-hole 321, when the two air bags 101 repeatedly expand and contract rapidly, the water in the inner water chamber 4 and the outer water chamber 5 will be stirred and mixed, so that the temperature of the mixed water in the overall chamber will drop rapidly.

[0040] S4: Next, the airbag 10 begins to inflate, reaching 2 / 3 of the capacity of the outer water chamber 5, and the first one-way valve 15 opens, allowing the cooled water to re-enter the cold water chamber 71. At this point, the remaining water in the outer water chamber 5 is 1 / 3 of its capacity. Then, the second water pump 20 starts to pump the water in the waterbag 9 back into the outer water chamber 5 through the fourth pipe 18. At this point, the outer water chamber 5 has 2 / 3 of its capacity. Subsequently, two bidirectional air pumps 102 are used again to quickly inflate and inhale the two sub-airbags 101, with the air volume reaching 1 / 3 of the capacity of the outer water chamber 5. This stirs and mixes the water in the inner water chamber 4 and the outer water chamber 5, causing the overall water temperature in the chamber to drop rapidly.

[0041] S5: Next, the airbag 10 begins to inflate, reaching 2 / 3 of the capacity of the outer water chamber 5, and the second one-way valve 19 opens, allowing the cooled water to re-enter the waterbag 9 to continue cooling the pipe.

[0042] As a result, the water in the outer water cavity 5 flows back and forth into the cold water cavity 71 and the water bladder 9 under the expansion and compression of the air bladder 10 and the sequential opening of the first one-way valve 15 and the second one-way valve 19, respectively. It is then transported back into the outer water cavity 5 for mixing and cooling by the first water pump 16 and the second water pump 20, respectively. Subsequently, it continues to be squeezed into the cold water cavity 71 (for cooling the lower part of the laser cutting head) and the water bladder (for cooling the cutting tube).

[0043] Throughout the process, although the laser cutting head 2 moves continuously (including moving up, down, left, and right) while cutting the pipe, the water circulates back into the outer water cavity 5 and is stirred and mixed, so the inner water cavity 4 maintains a certain amount of water. This cools the laser cutting head 2 by means of the cooling water in the inner water cavity 4.

[0044] like Figures 1-2 As shown, a through channel is formed inside the fixing base 8, and a water bladder 9 is installed inside the through channel. After being filled with water, the water bladder 9 adheres tightly to the outer surface of the pipe. The water bladder 9 can be glued into the through channel of the fixing base 8. Furthermore, the size of the fixing base 8 and the water bladder 9 can be adjusted according to the shape and diameter of the pipe being cut. When using the water bladder 9 to cool the pipe being cut:

[0045] a: The section of pipe to be cut (the part of the pipe to be cut) that is being laser cut will be wrapped in water bag 9, thereby pre-cooling the part to be cut and reducing the damage to the pipe caused by the high temperature generated during cutting.

[0046] b: During the pipe processing, the rear chuck moves the pipe back and forth. During this movement, the water bladder 9 briefly encloses the area being cut, cooling the enclosed area (which is at high temperature). This reduces the temperature of the cutting area, allowing laser cutting to continue and minimizing damage from the sustained high temperatures. For example, for stainless steel and aluminum alloy pipes, high temperatures can cause hardening or oxidation near the cut; cooling reduces heat-affected zone (HAZ) damage.

[0047] The water bladder 9 consists of an inner metal foil and an outer silicone rubber. The metal foil can be made of copper foil or aluminum foil with a thickness of 0.1 to 0.3 mm, while the silicone rubber can be filled with thermally conductive fillers such as aluminum nitride and silicon carbide. The metal foil and silicone rubber are pressed together with an adhesive (such as a silane coupling agent) to form a metal foil rubber sandwich structure. The metal side faces inward to contact the high-temperature area, while the rubber side faces outward to provide elasticity. The combination of the two takes into account both thermal conductivity and high-temperature resistance, making it suitable for most metal pipe cutting scenarios.

[0048] The above-mentioned air conditioner models are available as follows: Daikin FTXR series compressor air conditioners, which feature high-efficiency frequency conversion control, stable air output, and support for pipe connection.

[0049] The term "cooling water" in the aforementioned heat dissipation kit 3 is a general term and actually refers to any selectable coolant. Therefore, the coolant used can be deionized water, ethylene glycol aqueous solution, etc.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser tube cutting machine with a cooling system, comprising a worktable (1) and a front chuck and a rear chuck respectively disposed at the front and rear ends of the worktable (1), wherein a moving cutting assembly is provided on the upper side of the front chuck, the moving cutting assembly comprising a laser cutting head (2), characterized in that: The laser cutting head (2) is fitted with a heat dissipation kit (3) on its outer side. The heat dissipation kit (3) has an inner water cavity (4) and an outer water cavity (5) that are connected to each other. Both water cavities are equipped with cold air pipes for reducing water temperature. The bottom of the heat dissipation kit (3) is connected to an air blowing box (6). The cold air cools the water in the two water cavities and then flows into the air blowing box (6), and then blows downward to disperse the hot air flow generated by cutting. The bottom of the air blowing box (6) is connected to a collar (7) fitted on the lower part of the laser cutting head (2). The collar (7) has a cold water cavity (71) inside. A fixing seat (8) is installed on the outer wall of the front chuck. The inner ring of the fixing seat (8) is provided with a water bag (9) for cooling the pipe. An air bag (10) is installed in the outer water cavity (5). The outer water cavity (5) is connected to the cold water cavity (71) and the water bag (9) through pipes respectively. When the airbag (10) is filled with air at intervals equal to 1 / 3 and 2 / 3 of the capacity of the outer water chamber (5), the cooling water in the outer water chamber (5) will circulate in the outer water chamber (5), the cold water chamber (71) and the waterbag (9). The airbag (10) consists of two arc-shaped airbags (101) symmetrically installed on the bottom surface of the outer water cavity (5). The bottom of the heat dissipation kit (3) is symmetrically equipped with bidirectional air pumps (102) that are connected to the two airbags (101) respectively. The outer water chamber (5) and the cold water chamber (71) are connected by a first pipeline (13) and a second pipeline (14), respectively. The bottom of the outer water chamber (5) is provided with a first check valve (15), and one end of the first pipeline (13) is connected to the first check valve (15). A first water pump (16) for transporting water in the cold water chamber (71) back to the outer water chamber (5) is installed on the second pipeline (14). The outer water chamber (5) and the water bladder (9) are connected by a third pipe (17) and a fourth pipe (18), respectively. The bottom of the outer water chamber (5) is provided with a second one-way valve (19). One end of the third pipe (17) is connected to the second one-way valve (19). A second water pump (20) for transporting water in the water bladder (9) back to the outer water chamber (5) is installed on the fourth pipe (18).

2. The laser tube cutting machine with a cooling system according to claim 1, characterized in that: The heat dissipation kit (3) is provided with heat-conducting rings (31) close to the outer side of the laser cutting head (2) from the inside out. One side of the heat-conducting ring (31) is provided with a partition (32) for separating the inner water cavity (4) and the outer water cavity (5). The top of the partition (32) is provided with a through opening (321) for connecting the inner water cavity (4) and the outer water cavity (5). One side of the partition (32) is the outer ring wall of the heat dissipation kit (3).

3. The laser tube cutting machine with a cooling system according to claim 2, characterized in that: The capacity of the outer water cavity (5) is greater than that of the inner water cavity (4), and the capacity of the cold water cavity (71) and the water bladder (9) is 1 / 3 of the capacity of the outer water cavity (5).

4. The laser tube cutting machine with a cooling system according to claim 3, characterized in that: The water bladder (9) includes an inner metal foil and an outer silicone rubber, wherein the metal foil and the silicone rubber are pressed together by an adhesive to form a metal foil rubber sandwich structure.

5. The laser tube cutting machine with a cooling system according to claim 4, characterized in that: The outer side of the heat-conducting ring (31) is provided with a spiral first cold air pipe (11), and the outer side of the partition (32) is provided with a spiral second cold air pipe (12). The air inlet ends of the first cold air pipe (11) and the second cold air pipe (12) extend through the top of the heat dissipation kit (3), while the tail ends extend through the bottom of the heat dissipation kit (3) and into the air blowing box (6).

6. The laser tube cutting machine with a cooling system according to claim 5, characterized in that: The bottom edge of the air-blowing box (6) is provided with multiple air-blowing holes.

7. The laser tube cutting machine with a cooling system according to claim 6, characterized in that: A through channel is opened in the fixed seat (8), and the water bag (9) is installed in the through channel. After the water bag (9) is filled with water, it adheres tightly to the outer surface of the pipe.

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