Air cooling system and machining equipment

Abstract

The invention provides an air cooling system and machining equipment, and belongs to the field of machining cooling devices. The air cooling system comprises a refrigerating channel capable of refrigerating internal air, an air cooling spray head used for blowing cold air to a cutter is arranged at an outlet of the refrigerating channel in a communicating mode, and a pressurizing device used for driving the air to flow along the refrigerating channel and increasing the air pressure is arranged at an inlet of the refrigerating channel or in the refrigerating channel. And at least one reducing structure for reducing the section size of the refrigerating channel to gather and compress gas is arranged behind the pressurizing device in the refrigerating channel. The machining equipment comprises the air cooling system. Air is refrigerated while air is compressed, so that finally obtained cold air has higher heat absorption and cooling capacity, and the requirement of cutting machining with more heat is met.

Description

Technical Field

[0001] The invention belongs to the field of machining cooling devices, and in particular relates to an air cooling system and machining equipment. Background Art

[0002] Heat is generated during the cutting process. If the heat cannot be removed in time, the tool temperature will be too high, which will accelerate tool wear on the one hand and affect the processing accuracy and surface quality of the workpiece on the other.

[0003] Low-temperature air cooling is a common method for cooling cutting tools. The Chinese utility model patent application with authorization announcement number CN222681369U discloses a purge device for a CNC lathe, which is a low-temperature air cooling device. The purge device includes a box body, and the side walls of the box body are provided with semiconductor refrigeration plates for cooling the air therein. A fan is provided at the inlet of the box body, and a drying chamber and an exhaust pipe are connected to the outlet of the box body in sequence. After the normal temperature air is blown into the box body by the fan, it is cooled by the semiconductor refrigeration plates to form cold air. The cold air forms dry cold air after passing through the drying chamber, and is finally blown to the cutting work area through the exhaust pipe to cool the cutting tool.

[0004] The above-mentioned purge device only uses semiconductor refrigeration plates to cool the air. The heat absorption and cooling effect of the cold air that can be obtained is general, and is only suitable for cutting processes with less heat generation. In the processing of metal materials that are difficult to cut, more heat is generated, and the above-mentioned purge device cannot meet the use requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide an air cooling system to solve the technical problem that the air cooling device in the prior art has a poor cooling effect; Another object of the present invention is to provide a machining device to solve the above technical problems.

[0006] To achieve the above objectives, the technical solution of the air cooling system provided by the present invention is: A cooling system includes a cooling channel capable of cooling internal gas, an air-cooling nozzle for blowing cold air toward a tool is provided at the outlet of the cooling channel, a pressurizing device for driving the gas to flow along the cooling channel and increase the gas pressure is provided at the inlet or inside of the cooling channel, and at least one reducing structure is provided after the pressurizing device in the cooling channel to reduce the cross-sectional size of the cooling channel so as to gather and compress the gas.

[0007] As a further improvement, the refrigeration channel includes at least two levels of refrigeration bins, which are connected by insulated pipes, and the internal cross-sectional size of at least one refrigeration bin is smaller than the internal cross-sectional size of the upper level refrigeration bin.

[0008] As a further improvement, a desiccant for absorbing moisture in the cold air is provided in the heat-insulated pipe.

[0009] As a further improvement, the refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat-absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a heat sink for dissipating heat. A cooling fan is also provided outside the warehouse wall for quickly dissipating heat from the heat sink.

[0010] As a further improvement, the refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat-absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a water-cooling structure for rapid heat dissipation.

[0011] As a further improvement, an expansion valve is provided on the pipeline between the outlet of the refrigeration channel and the air-cooling nozzle.

[0012] As a further improvement, a heat conduction pipe is provided between the outlet of the cooling channel and the air-cooling nozzle. The heat conduction pipe is used to be coiled near the cutting area of ​​the machine tool to absorb heat near the cutting area so that a low-temperature zone can be formed in the cutting area and the temperature of the low-temperature zone can be maintained.

[0013] As a further improvement, at least two air-cooling nozzles are provided, each of which is used to be arranged around the cutting area, and the cold air blowing direction of each air-cooling nozzle is used to be toward the cutting area.

[0014] As a further improvement, the air cooling system further comprises a lubrication nozzle for spraying cutting fluid mist onto the cutting area, where the cutting fluid mist is frozen in the cutting area to form solid particles or a solid-liquid mixture of the cutting fluid.

[0015] The beneficial effect is that the air cooling system provided by the present invention is a groundbreaking invention. By providing a pressurizing device and a reduced diameter structure in the cooling channel, the air passing through the cooling channel is compressed and releases heat, thereby enhancing the cooling efficiency of the cooling channel for the air inside. This allows the cold air ultimately blown into the cutting space to absorb additional heat after the pressure is released, thereby enhancing the heat absorption and cooling effect of the cold air and meeting the needs of more cutting processes.

[0016] To achieve the above-mentioned purpose, the technical solution of the machining equipment provided by the present invention is: A machining equipment includes a machine tool and an air cooling system arranged on the machine tool. The air cooling system includes a refrigeration channel capable of cooling internal gas. The outlet of the refrigeration channel is connected to an air cooling nozzle for blowing cold air to the tool. The inlet or the interior of the refrigeration channel is provided with a pressurizing device for driving the gas to flow along the refrigeration channel and increase the gas pressure. At least one reducing structure is provided after the pressurizing device in the refrigeration channel to reduce the cross-sectional size of the refrigeration channel to gather and compress the gas.

[0017] As a further improvement, the refrigeration channel includes at least two levels of refrigeration bins, which are connected by insulated pipes, and the internal cross-sectional size of at least one refrigeration bin is smaller than the internal cross-sectional size of the upper level refrigeration bin.

[0018] As a further improvement, a desiccant for absorbing moisture in the cold air is provided in the heat-insulated pipe.

[0019] As a further improvement, the refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat-absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a heat sink for dissipating heat. A cooling fan is also provided outside the warehouse wall for quickly dissipating heat from the heat sink.

[0020] As a further improvement, the refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat-absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a water-cooling structure for rapid heat dissipation.

[0021] As a further improvement, an expansion valve is provided on the pipeline between the outlet of the refrigeration channel and the air-cooling nozzle.

[0022] As a further improvement, a heat conduction pipe is provided between the outlet of the cooling channel and the air-cooling nozzle. The heat conduction pipe is used to be coiled near the cutting area of ​​the machine tool to absorb heat near the cutting area so that a low-temperature zone can be formed in the cutting area and the temperature of the low-temperature zone can be maintained.

[0023] As a further improvement, at least two air-cooling nozzles are provided, each of which is used to be arranged around the cutting area, and the cold air blowing direction of each air-cooling nozzle is used to be toward the cutting area.

[0024] As a further improvement, the air cooling system further comprises a lubrication nozzle for spraying cutting fluid mist onto the cutting area, where the cutting fluid mist is frozen in the cutting area to form solid particles or a solid-liquid mixture of the cutting fluid.

[0025] The beneficial effect is that the machining equipment provided by the present invention is an improvement over the prior art. The air cooling system in the machining equipment, by providing a pressurizing device and a reduced diameter structure in the cooling channel, compresses the air passing through the cooling channel, releasing heat. This enhances the cooling efficiency of the cooling channel for the air inside. This allows the cold air ultimately blown into the cutting space to absorb additional heat after the pressure is released, thereby enhancing the heat absorption and cooling effect of the cold air and meeting the needs of more cutting processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the machine tool in embodiment 1 of the machining equipment of the present invention; Figure 2 This is a schematic structural diagram of an air cooling system in Embodiment 1 of the machining equipment of the present invention; Figure 3 This is a schematic structural diagram of the second-stage refrigeration bin in embodiment 1 of the machining equipment of the present invention.

[0027] Description of reference numerals: 1. Spindle box; 2. Tool holder; 3. Computer; 4. PLC control box; 5. Power supply; 6. Temperature sensor; 7. Air-cooling nozzle; 8. Pressurizing device; 9. Lubricating nozzle; 10. First-stage refrigeration chamber; 11. Second-stage refrigeration chamber; 12. Third-stage refrigeration chamber; 13. Fourth-stage refrigeration chamber; 14. Insulation pipe; 15. Heat absorber; 16. Heat sink; 17. Cooling fan; 18. Semiconductor refrigeration plate; 19. Outer cover; 20. Water inlet; 21. Water outlet; 22. Heat transfer pipe; 23. Expansion valve; 24. Workpiece; 25. Tool; 26. Water-cooling channel. DETAILED DESCRIPTION

[0028] The present invention is described in further detail below with reference to the examples.

[0029] Specific embodiment 1 of the machining equipment provided by the present invention: The machining equipment comprises a machine tool and an air cooling system arranged on the machine tool.

[0030] See attached Figure 1 The machine tool includes a bed and a spindle box 1 and a feed box arranged on the bed. The machine tool is provided with a tool holder 2, and a tool 25 is installed on the tool holder 2. During use, the tool 25 can realize cutting processing on the workpiece 24, and the area where the tool 25 cuts the workpiece 24 is the cutting area.

[0031] The air cooling system is mainly used to cool the tool 25 to prevent the tool 25 from being overheated and affecting the service life and processing quality of the tool 25. Figure 2The air cooling system mainly includes a computer 3, a PLC control box 4, a power supply 5, a temperature sensor 6, a cooling channel, an air cooling nozzle 7, a pressurizing device 8, a heat conduction pipe 22 and a lubricating nozzle 9.

[0032] The refrigeration channel is used to cool the air to form cold air. The pressurizing device 8 is located at the entrance of the refrigeration channel and is used to drive the ambient temperature air in the environment to continuously enter the refrigeration channel. In this embodiment, the pressurizing device 8 is a pressurizing fan. In other embodiments, the pressurizing device 8 can also be an air pump or an air compressor.

[0033] The refrigeration channel includes four refrigeration chambers, each connected by an insulated pipe 14. Desiccant is installed in the insulated pipe 14. Water vapor in low-temperature air easily condenses to form mist. The desiccant can absorb the mist in the air, thereby preventing it from affecting cutting quality. In this embodiment, the desiccant is also arranged in a multi-stage structure, which can fully absorb moisture in the air after multiple refrigeration cycles.

[0034] The four-stage refrigeration chambers all utilize semiconductor refrigeration panels 18 to absorb internal heat and discharge it to the outside. The first stage refrigeration chamber 10 has a larger internal cross-sectional dimension, while the second stage refrigeration chamber 11, the third stage refrigeration chamber 12, and the fourth stage refrigeration chamber 13 have smaller internal cross-sectional dimensions.

[0035] The first-stage refrigeration chamber 10 includes a chamber wall, heat-absorbing fins 15 disposed on the inside of the chamber wall, heat sinks 16 disposed on the outside of the chamber wall, and a cooling fan 17 disposed on the outside of the chamber wall. A semiconductor refrigeration plate 18 is fixed to the chamber wall. During use, the semiconductor refrigeration plate 18 transfers heat from the inside to the outside. The heat-absorbing fins 15 have a large contact area with the air inside the first-stage refrigeration chamber 10, thereby fully absorbing the heat from the air inside the first-stage refrigeration chamber 10 and reducing the air temperature. The heat sink 16 has a large surface area and, in conjunction with the cooling fan 17, can quickly dissipate heat, thereby reducing the temperature difference between the inside and outside of the first-stage refrigeration chamber 10 and facilitating rapid cooling by the semiconductor refrigeration plate 18.

[0036] See attached Figure 3The rear three-stage refrigeration chamber comprises a tubular wall constructed from semiconductor cooling panels 18. Heat absorbing fins 15 are also positioned on the inside of these walls. These fins 15 are blade-like in structure, with a wide base and a sharp edge towards the center of the chamber. The fins 15 are also spaced widely apart circumferentially. This ensures a large contact area between the fins 15 and the interior air, enhancing heat absorption. Furthermore, since the air temperature is already low, moisture in the air will condense as frost on the fins 15. The structure of the fins 15 also ensures ample space to accommodate this condensed frost. A water-cooling structure is located on the outside of the chamber wall, achieving even better heat dissipation. This water-cooling structure comprises an outer cover 19 that fits over the chamber wall. A water-cooling channel 26 is provided between the outer cover 19 and the chamber wall for the circulation of cooling water. The outer cover 19 also features a water inlet 20 and a water outlet 21 for the cooling water. The outer cover 19 is a transparent glass cover, allowing for easy monitoring of the water-cooling status.

[0037] The last three refrigeration chambers utilize water cooling to dissipate heat because the air temperature inside them is already low. If the temperature outside the chamber walls cannot be lowered in time, the cooling efficiency of the semiconductor refrigeration chips will be affected. The first refrigeration chamber 10 utilizes air cooling rather than water cooling because the temperature difference between the inside and outside of this refrigeration chamber is small, resulting in higher cooling efficiency for the semiconductor refrigeration chips. Using air cooling can also reduce costs.

[0038] The insulated pipe 14 between the last three refrigeration warehouses is a constant diameter structure, while the pipe between the first refrigeration warehouse 10 and the second refrigeration warehouse 11 is a variable diameter structure. The end of the insulated pipe 14 connected to the first refrigeration warehouse 10 has a larger diameter, and the end connected to the second refrigeration warehouse 11 has a smaller diameter. In this way, the insulated pipe 14 can be used to gather and compress the air inside it.

[0039] Air flows along the cooling channel, using the cooling channel to reduce its temperature. Simultaneously, the air is compressed by the pressurizing device 8 and the reduced diameter structure of the cooling channel. After compression, a portion of the air's internal energy is converted into heat through energy conversion. This increases the temperature of the compressed air, further helping the semiconductor cooling plate 18 to transfer heat more efficiently.

[0040] The cold air can eventually be blown to the cutting area through the air-cooling nozzle 7. The cold air circulating in the cooling channel of the same length, after compression, has the same temperature as the uncompressed air when it flows out of the cooling channel. However, the volume of the compressed cold air will expand after the final pressure relief, and heat absorption will occur in this process. Therefore, the cooling effect of the compressed cold air on the tool 25 will be enhanced.

[0041] The heat transfer pipe 22 is a copper tube. One end of the heat transfer pipe 22 is connected to the outlet of the fourth-stage refrigeration bin 13. The other end of the heat transfer pipe 22 is connected to four branch pipes. There are four air-cooling nozzles 7, each mounted at the end of each branch pipe. The heat transfer pipe 22 and the fourth-stage refrigeration bin 13 are connected by a transition pipe. The transition pipe has a funnel-shaped structure, with a larger end connecting to the fourth-stage refrigeration bin 13 and a smaller end connecting to the heat transfer pipe 22. A desiccant can also be placed inside the transition pipe.

[0042] An expansion valve 23 is provided on the heat conducting pipe 22. The purpose of providing the expansion valve 23 is to reduce the pressure of the cold air so that the cold air can absorb heat and cool down. After the cold air passes through the expansion valve 23, the temperature will be further reduced.

[0043] The heat-conducting pipe 22 is coiled and arranged near the cutting area. When the cold air flows in the heat-conducting pipe 22, it will absorb the heat near the cutting area, thereby lowering the temperature of the cutting area, forming a larger low-temperature zone in and near the cutting area, and the temperature of the low-temperature zone can be maintained by utilizing the heat-conducting pipe 22.

[0044] Finally, the cold air passes through the four air-cooling nozzles 7 and is blown into the cutting area. During the process of being blown out, the cold air undergoes a second decompression, thereby absorbing heat again, further enhancing the cooling effect of the cold air on the tool 25. Because there is already a large low-temperature area near the cutting area, there is a large space for temperature transition between the core position of the cutting area and the surrounding environment. The temperature of the cutting area is not affected by the ambient temperature, thus ensuring a good cooling effect on the tool 25.

[0045] Four air-cooling nozzles 7 are arranged around the cutting area and blow cold air toward the cutting area. The cold air blown out by the four air-cooling nozzles 7 forms a low-temperature atmosphere in the cutting area.

[0046] The lubrication nozzle 9 is mounted on the tool holder 2 and sprays cutting fluid mist directly toward the cutting area. The cutting fluid mist will immediately freeze in the low-temperature atmosphere to form solid particles of cutting fluid or a solid-liquid mixture. The gas flow in the low-temperature atmosphere is relatively slow, and the solid particles of cutting fluid can float in the low-temperature atmosphere to the narrow gaps on the workpiece 24 and the tool 25. The solid particles of cutting fluid can immediately liquefy after contacting the workpiece 24 or the tool 25, thereby absorbing heat and providing lubrication for cutting. Compared with liquid cutting fluid mist, the solid particles of cutting fluid will not adsorb or fuse with each other, so they can maintain a smaller volume before contacting the workpiece 24 or the tool 25, making it easier to enter narrow gaps.

[0047] In this embodiment, the power supply 5 is used to supply power to each electrical component, the computer 3 and the PLC control box 4 are used to control the start and stop of each component and data processing, and the temperature sensor 6 is set in each refrigeration bin and on the tool holder 2 to monitor the temperature at the corresponding position.

[0048] In addition, in this embodiment, a dust suction device is provided below the cutting area for collecting chips and dust in a timely manner.

[0049] Specific embodiment 2 of the machining equipment provided by the present invention: This embodiment is a derivative of Embodiment 1, and differs from Embodiment 1 in that no lubrication nozzle is provided in this embodiment, and the cutting process is dry cutting.

[0050] Specific embodiment 3 of the machining equipment provided by the present invention: This embodiment is a modification of Embodiment 1. The difference from Embodiment 1 is that the cutting fluid in this embodiment is a low-temperature non-condensing cutting fluid, so that it remains in liquid form during use.

[0051] Specific embodiment 4 of the machining equipment provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no heat conduction pipe is provided in this embodiment, and the air-cooling nozzle and the fourth-stage refrigeration bin are connected via a heat-insulating pipe.

[0052] Specific embodiment 5 of the machining equipment provided by the present invention: This embodiment is a variation of Embodiment 1, and differs from Embodiment 1 in that no expansion valve is provided on the heat transfer pipe in this embodiment.

[0053] Specific embodiment 6 of the machining equipment provided by the present invention: This embodiment is a modification of Embodiment 1, and differs from Embodiment 1 in that no desiccant is provided in the heat-insulating pipe in this embodiment.

[0054] In one example of this embodiment, the desiccant is directly disposed in the refrigeration chamber.

[0055] In another embodiment of the present embodiment, no desiccant is provided in the insulation pipe and the refrigeration chamber, and a water tank structure for collecting condensed water is provided in the refrigeration chamber.

[0056] Specific embodiment 7 of the machining equipment provided by the present invention: This embodiment is a variation of Embodiment 1. The difference from Embodiment 1 is that the internal cross-sectional dimensions of each stage of the refrigeration bin are different, and the internal cross-sectional dimensions decrease from the first stage to the last stage. In this way, the cold air can be compressed once and cooled once before passing through the first stage of the refrigeration bin.

[0057] Specific embodiment 8 of the machining equipment provided by the present invention: This embodiment is a variation of Embodiment 1. The difference from Embodiment 1 is that this embodiment has only three refrigeration bins. In other embodiments, two refrigeration bins may be provided. The number of refrigeration bins may be selected as needed.

[0058] Specific embodiment 9 of the machining equipment provided by the present invention: This embodiment is a variation of Embodiment 1. The difference from Embodiment 1 is that in this embodiment, the pressurizing device is located within the second-stage refrigeration compartment, and the internal cross-sectional dimensions of the third-stage refrigeration compartment are smaller than those of the second-stage refrigeration compartment. This allows the air to be initially pressurized in the second-stage refrigeration compartment, while the air pressure in the first-stage refrigeration compartment is lower, primarily for pre-cooling the air.

[0059] Specific embodiment 10 of the machining equipment provided by the present invention: This embodiment is a variation of Embodiment 1. The difference from Embodiment 1 is that in this embodiment, the cooling channel is a pipe provided with an insulation layer. Multiple diameter reduction structures are provided within the pipe, which reduce the cross-sectional dimensions of the pipe along the direction of gas flow. A pressurizing device is provided at the inlet of the pipe to pressurize the air.

[0060] A heat-absorbing copper tube is provided in the pipeline, which is connected to the condenser and compressor provided outside the pipeline. There is refrigerant in the heat-absorbing copper tube, thereby transferring the heat in the pipeline to the outside of the pipeline.

[0061] Specific implementation of the air cooling system provided by the present invention: The air cooling system is the air cooling system in the embodiment of the machining equipment described above, and will not be described in detail.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air cooling system, characterized in that: It includes a refrigeration channel capable of cooling the internal gas, the outlet of the refrigeration channel is connected to a wind-cooling nozzle for blowing cold air to the tool, the inlet or inside of the refrigeration channel is provided with a pressurizing device for driving the gas to flow along the refrigeration channel and increase the air pressure, and at least one reducing structure is provided after the pressurizing device in the refrigeration channel to reduce the cross-sectional size of the refrigeration channel to gather and compress the gas.

2. The air cooling system according to claim 1, characterized in that: The refrigeration channel includes at least two levels of refrigeration bins, which are connected by insulation pipes, and the internal cross-sectional size of at least one refrigeration bin is smaller than the internal cross-sectional size of the upper level refrigeration bin.

3. The air cooling system according to claim 2, characterized in that: A desiccant is provided in the heat-insulating pipe to absorb moisture in the cold air.

4. The air cooling system according to claim 2 or 3, characterized in that: The refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat-absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a heat sink for dissipating heat. A cooling fan is also provided outside the warehouse wall for quickly dissipating heat from the heat sink.

5. The air cooling system according to claim 2 or 3, characterized in that: The refrigeration warehouse includes a warehouse wall, which is composed of a semiconductor refrigeration plate or a semiconductor refrigeration plate is installed on the warehouse wall. The inner side of the warehouse wall is provided with a heat absorbing plate for absorbing internal heat, and the outer side of the warehouse wall is provided with a water cooling structure for rapid heat dissipation.

6. The air cooling system according to any one of claims 1 to 3, characterized in that: An expansion valve is provided on the pipeline between the outlet of the refrigeration channel and the air-cooling nozzle.

7. The air cooling system according to any one of claims 1 to 3, characterized in that: A heat conduction pipe is provided between the outlet of the cooling channel and the air cooling nozzle. The heat conduction pipe is used to be coiled near the cutting area of ​​the machine tool to absorb heat near the cutting area so that a low temperature zone can be formed in the cutting area and the temperature of the low temperature zone can be maintained.

8. The air cooling system according to any one of claims 1 to 3, characterized in that: At least two air-cooling nozzles are provided, each of which is used to be arranged around the cutting area, and the cold air blowing direction of each air-cooling nozzle is used to be toward the cutting area.

9. The air cooling system according to claim 8, characterized in that: The air cooling system also includes a lubrication nozzle for spraying cutting fluid mist onto the cutting area. The cutting fluid mist is frozen in the cutting area to form solid particles or a solid-liquid mixture of the cutting fluid.

10. A machining equipment comprising a machine tool, characterized in that: It also includes an air cooling system according to any one of claims 1 to 9, which is arranged on the machine tool.

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