Cooling device applied to machine tool and machine tool

Abstract

The embodiment of the invention relates to the technical field of parts, parts or accessories of machine tools and discloses a cooling device applied to a machine tool and the machine tool, the cooling device comprises a lead screw cooling assembly, a sliding rail cooling assembly, a water cooling machine and a plurality of water diversion blocks, and the lead screw cooling assembly comprises a cooling sleeve. The cooling sleeve cools a lead screw nut on the lead screw assembly, reduces heat of the lead screw nut, and meanwhile reduces or prevents the heat energy of the lead screw nut from being transmitted to surrounding parts on a machine tool. For the sliding rail assembly, cooling liquid output by the water cooling machine can be supplied to the first cooling pipe of the sliding rail cooling assembly through the water distribution block, the base is cooled through the first cooling pipe, heat energy of the base is reduced, and meanwhile the heat energy of the base is reduced or prevented from being transmitted to surrounding parts on the machine tool. Motion deformation of the machine tool can be prevented, precision and stability of the machine tool can be guaranteed, and machining precision is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of parts, components or accessories of machine tools, in particular to a cooling device applied to a machine tool and the machine tool. BACKGROUND

[0002] Five-axis machining center is a high-end product in the field of machine tools, and the machining precision requirement is very high. During the working process of the five-axis machining center, various factors affecting the precision are generated, in which the thermal deformation of the transmission components of the machine tool such as the lead screw guide rail during operation is a common factor affecting the precision of the machine tool. Therefore, controlling the temperature of the transmission components such as the lead screw and the guide rail is an effective way to improve the precision of the machine tool. At present, there are two methods for cooling the lead screw, one is to use a hollow water-cooled lead screw, and the cooling circulating water flows through the center of the lead screw to take away the heat of the lead screw, but in the lead screw pair, the heat of the nut is much larger than that of the lead screw, so a more effective way is to cool the nut. At the same time, due to the high-speed rotation of the lead screw, a rotating sealing device must be used for the hollow water-cooled lead screw, which is also the most prone to failure part of the hollow water-cooled lead screw; the second method is to use a water-cooled nut, but the water-cooled nut product is very few, mainly because the cooling structure of the nut is complex, the cost is high, and moreover, due to the limitation of the structure of the nut, in some high-load lead screws such as double-nut pre-tightening lead screws, the nut cooling cannot be realized. SUMMARY

[0003] In the summary section, a series of simplified concepts are introduced, which will be further described in detail in the specific embodiment section. This part of the present application does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor to try to determine the protection scope of the claimed technical solution.

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the first aspect of the present application provides a cooling device applied to a machine tool.

[0006] The second aspect of the present application provides a machine tool.

[0007] Therefore, according to the first aspect of the present application, a cooling device applied to a machine tool is provided, the machine tool comprising a lead screw assembly and a slide rail assembly, the lead screw assembly comprising a lead screw body and a lead screw nut sleeved on the lead screw body, the slide rail assembly comprising a base and a guide rail connected to the base, and the cooling device comprising: a lead screw cooling assembly, the lead screw cooling assembly comprising a cooling sleeve sleeved on the lead screw nut; The slide rail cooling assembly comprises: a first cooling pipe embedded in the base; The water cooling machine is used for storing cooling liquid, and is communicated with the water distribution blocks through pipes. Each screw rod cooling assembly is communicated with at least one water distribution block, and each slide rail cooling assembly is communicated with at least one water distribution block.

[0008] In an available embodiment, a first groove is formed on the base, and the first cooling pipe is arranged in the first groove.

[0009] In an available embodiment, the slide rail cooling assembly further comprises: A second cooling pipe, the slide rail assembly further comprises: a sliding block connected to the guide rail, and a working piece connected to the sliding block. Wherein, a second groove is formed on the side of the working piece facing the sliding block, and the second cooling pipe is arranged in the second groove.

[0010] In an available embodiment, the cooling jacket comprises: A shell; An outer ring connected to the shell, one end of the outer ring is provided with a water inlet, and the other end is provided with a water outlet, the outer ring is provided with a radial passage and an axial passage; An inner ring, the outer ring is sleeved on the inner ring, the inner ring is sleeved on the screw nut, the outer wall of the inner ring is provided with a double helix structure groove, and the cooling passage is formed between the inner ring and the outer ring through the double helix structure groove; A sealing ring arranged between the outer ring and the inner ring.

[0011] In an available embodiment, the layout method of the cooling device comprises: The machine tool is modularly divided to obtain a plurality of sub-modules; The thermal energy symmetry axis of each sub-module is determined; Temperature sensors are arranged on both sides of the thermal energy symmetry axis of each sub-module; Based on the detection results of the temperature sensors, the temperature field distribution state of each sub-module is determined; Based on the temperature field distribution state, the layout mode of the slide rail cooling assembly on each sub-module is determined, so that the temperature field of the sub-module is symmetrically distributed along the symmetry axis under the condition that the cooling device is turned on.

[0012] In an embodiment, the step of determining the temperature field distribution state of each sub-module based on the detection result of the temperature sensor comprises: determining a plurality of actual detection point values based on the detection result of the temperature sensor; constructing a relationship function based on the actual detection point values; determining a theoretical temperature value of any point on the sub-module based on the relationship function, and determining the temperature field distribution state of each sub-module.

[0013] In an embodiment, the step of determining the layout of the slide rail cooling assembly on each sub-module based on the temperature field distribution state comprises: determining the depth of the first groove and the second groove of the slide rail cooling assembly based on the temperature field distribution state, and determining the diameter of the first cooling pipe and the second cooling pipe.

[0014] In an embodiment, the control method of the cooling device comprises: determining the current temperature field distribution state of each sub-module based on the detection result of the temperature sensor; adjusting the supply flow of the cooling liquid of the lead screw cooling assembly and the slide rail cooling assembly based on the current temperature field distribution state, so that the temperature field of the sub-module is symmetrically distributed along the direction of the symmetry axis and the temperature is lower than a threshold value when the machine tool is working.

[0015] In an embodiment, the step of adjusting the supply flow of the cooling liquid of the lead screw cooling assembly and the slide rail cooling assembly based on the current temperature field distribution state comprises: determining the area of the sub-module that needs to be regulated in temperature based on the current temperature field distribution state; obtaining distance information between the area that needs to be regulated in temperature and the slide rail cooling assembly; determining the supply flow of the cooling liquid based on the temperature of the cooling liquid input by the slide rail cooling assembly and the distance information.

[0016] According to a second aspect of the embodiments of the present application, a machine tool is provided, comprising: a cooling device applied to a machine tool according to any of the above technical solutions; a bed body; a worktable slidably connected to the bed body through a first slide rail assembly; a column connected to the bed body; a slide plate slidably connected to the column through a second slide rail assembly and a first lead screw assembly; A spindle box is slidably connected to the slide plate by a third slide rail assembly and a second screw rod assembly.

[0017] Compared with the prior art, the present application at least has the following beneficial effects: The cooling device applied to the machine tool provided by the embodiment of the present application comprises a screw rod cooling assembly, a slide rail cooling assembly, a water cooler and a plurality of water distribution blocks, the screw rod cooling assembly comprises a cooling jacket, and the slide rail cooling assembly comprises a first cooling pipe. During the operation of the machine tool, especially during the operation of the five-axis machining center, the cooling device applied to the machine tool provided by the embodiment of the present application can cool the moving parts of the machine tool, which can include the screw rod assembly and the slide rail assembly. For the screw rod assembly, the cooling liquid supplied by the water cooler can be supplied to the cooling jacket of the screw rod cooling assembly through the water distribution blocks, the cooling jacket cools the screw nut above the screw rod assembly, reduces the heat of the screw nut, and at the same time reduces or avoids the heat energy of the screw nut from being transmitted to the surrounding parts of the machine tool. For the slide rail assembly, the cooling liquid output by the water cooler can be supplied to the first cooling pipe of the slide rail cooling assembly through the water distribution blocks, and the base is cooled through the first cooling pipe, thereby reducing the heat energy of the base and at the same time reducing or avoiding the heat energy of the base from being transmitted to the surrounding parts of the machine tool. The movement deformation of the machine tool can be prevented, the precision and stability of the machine tool can be ensured, and the machining precision can be improved.

[0018] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the present application. Moreover, the same reference numerals in the attached drawings refer to the same or similar components. In the drawings: Figure 1 A schematic structural view of the arrangement relationship between the screw rod cooling assembly of the cooling device applied to the machine tool and the screw rod assembly according to an embodiment of the present application; Figure 2 A partial enlarged schematic structural view of the arrangement relationship between the screw rod cooling assembly of the cooling device applied to the machine tool and the screw rod assembly according to an embodiment of the present application; Figure 3 A schematic structural view of the arrangement relationship between the slide rail cooling assembly of the cooling device applied to the machine tool and the slide rail assembly according to an embodiment of the present application; Figure 4A schematic structural view of a machine tool according to an embodiment provided in the present application; Figure 5 A schematic structural view of a machine tool according to an embodiment provided in the present application, with water cooling machines and pipes hidden.

[0020] Wherein, Figures 1 to 5 The correspondence between the reference signs and the component names is as follows: 110 screw rod assembly, 120 slide rail assembly, 130 bed, 140 worktable, 150 column, 160 slide plate, 170 spindle box; 111 screw rod body, 112 screw rod nut, 121 base, 122 guide rail, 123 sliding block, 124 workpiece, 1211 first groove body, 1241 second groove body; 210 screw rod cooling assembly, 220 slide rail cooling assembly, 230 water cooling machine, 240 water distribution block; 211 cooling jacket, 212 sealing ring, 2111 shell, 2112 outer ring, 2113 inner ring; 221 first cooling pipe, 222 second cooling pipe. DETAILED DESCRIPTION

[0021] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the technical solutions provided by the present application. However, it will be apparent to one of ordinary skill in the art that the technical solutions provided by the present application can be implemented without one or more of these details.

[0022] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise. In addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the stated features, integers, steps, operations, elements, and / or components exist, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0023] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in various different forms, and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that the embodiments are provided so that the disclosure of the present application is thorough and complete, and the concepts of the exemplary embodiments are fully conveyed to those of ordinary skill in the art.

[0024] As Figures 1 to 5As shown, according to the first aspect of the embodiments of the present application, a cooling device applied to a machine tool is provided, the machine tool includes a screw assembly 110 and a slide rail assembly 120, the screw assembly 110 includes a screw body 111 and a screw nut 112 sleeved on the screw body 111, the slide rail assembly 120 includes a base 121 and a guide rail 122 connected to the base 121, the cooling device includes a screw cooling assembly 210, the screw cooling assembly 210 includes a cooling sleeve 211 sleeved on the screw nut 112, a slide rail cooling assembly 220, the slide rail cooling assembly includes a first cooling pipe 221 embedded in the base 121, a water cooling machine 230 for storing cooling liquid, and a plurality of water distribution blocks 240, each screw cooling assembly 210 is communicated with at least one water distribution block 240, and each slide rail cooling assembly 220 is communicated with at least one water distribution block 240.

[0025] The cooling device applied to the machine tool provided by the embodiments of the present application includes the screw cooling assembly 210, the slide rail cooling assembly 220, the water cooling machine 230 and the plurality of water distribution blocks 240, the screw cooling assembly 210 includes the cooling sleeve 211, and the slide rail cooling assembly 220 includes the first cooling pipe 221. Based on this, during the operation of the machine tool, especially during the operation of the five-axis machining center, the cooling device applied to the machine tool provided by the embodiments of the present application can cool the moving parts of the machine tool, which can include the screw assembly 110 and the slide rail assembly 120. For the screw assembly 110, the cooling liquid supplied by the water cooling machine 230 can be supplied to the cooling sleeve 211 of the screw cooling assembly 210 through the water distribution block 240, the cooling sleeve 211 cools the screw nut 112 above the screw assembly 110, reduces the heat of the screw nut 112, and at the same time reduces or avoids the heat energy of the screw nut 112 from being transmitted to the surrounding parts of the machine tool. For the slide rail assembly 120, the cooling liquid output by the water cooling machine 230 can be supplied to the first cooling pipe 221 of the slide rail cooling assembly 220 through the water distribution block 240, and the base 121 is cooled through the first cooling pipe 221, thereby reducing the heat energy of the base 121, and at the same time reducing or avoiding the heat energy of the base 121 from being transmitted to the surrounding parts of the machine tool. The motion deformation of the machine tool can be prevented, the precision and stability of the machine tool can be ensured, and the machining precision can be improved.

[0026] The cooling device applied to the machine tool provided by the embodiments of the present application can cool the moving parts of the machine tool through the screw cooling assembly 210 and the slide rail cooling assembly 220, can reduce the probability of deformation of the moving parts of the machine tool, and can avoid the heat energy from being transmitted to other parts of the machine tool, thereby reducing the probability of deformation of the whole machine tool affected by the heat energy and ensuring the machining precision.

[0027] The cooling device applied to the machine tool provided in the embodiments of the present application considers that, for the screw rod assembly 110, the heat energy generated by the screw nut 112 during the working process will be much greater than the heat energy of the screw rod body 111, and the cooling jacket 211 is sleeved on the screw nut 112, which can directly cool the screw nut 112 with greater heat energy, and can better avoid the deformation of the screw rod assembly 110 and avoid the heat energy from being transmitted to other components.

[0028] As shown in Figure 3 In a feasible implementation, the base 121 is formed with a first groove body 1211, and the first cooling pipe 221 is arranged in the first groove body 1211.

[0029] In the technical solution, the arrangement mode of the first cooling pipe 221 is further provided, the first cooling pipe 221 is arranged in the base 121 through the first groove body 1211, so that the first cooling pipe 221 can be arranged in the base 121 in an embedded manner, on the one hand, the contact area of the first cooling pipe 221 and the base 121 can be increased, and on the other hand, the appearance shape of the base 121 can be not changed, and the layout of other components of the machine tool is facilitated.

[0030] As shown in Figure 3 In a feasible implementation, the slide rail cooling assembly 220 further includes a second cooling pipe 222, the slide rail assembly 120 further includes a sliding block 123 and a working piece 124, the sliding block 123 is slidingly connected to the guide rail 122, and the working piece 124 is connected to the sliding block 123; wherein a second groove body 1241 is formed on the side of the working piece 124 facing the sliding block 123, and the second cooling pipe 222 is arranged in the second groove body 1241.

[0031] In the technical solution, considering that the slide rail assembly 120 on the machine tool needs to drive the working piece 124 to move through the sliding block 123, the second groove body 1241 can be formed on the side of the working piece 124 facing the sliding block 123, and then the second cooling pipe 222 is arranged in the second groove body 1241, so that the sliding block 123 and the working piece 124 can be cooled through the second cooling pipe 222, and the heat energy generated during the working process of the slide rail assembly 120 can be further avoided or reduced from being transmitted to the working piece 124, and the machining precision is further guaranteed.

[0032] In some examples, the materials of the first cooling pipe 221 and the second cooling pipe 222 can both be copper materials, so that the first cooling pipe 221 and the second cooling pipe 222 can be bent, and the heat conduction efficiency is improved.

[0033] In some examples, the working piece 124 can include a slide plate or a main shaft box 170 of the machine tool, or other components connected to the sliding block 123.

[0034] In some examples, the water distribution block 240 can be a passage processed on the metal block for distributing the cooling liquid, and can be arranged near the lead screw cooling assembly 210 or the slide rail cooling assembly 220 to facilitate the supply of the cooling liquid.

[0035] In some examples, the machine tool often involves the use of the water chiller 230 during the working process, such as the machine tool needs to use the water chiller 230 to output the cooling liquid to cool and clean the tool head, and therefore the cooling device applied to the machine tool provided by the embodiment of the present application can use the water chiller 230 above the machine tool, and the pipeline for supplying the cooling liquid to the lead screw cooling assembly 210 or the slide rail cooling assembly 220 can be arranged synchronously with other lines above the machine tool, so that when the cooling device is applied to the machine tool, the assembly of the cooling device is facilitated, and the structure of the machine tool does not need to be changed in a large range, and the application prospect is high.

[0036] As shown in Figure 1 , Figure 2 and Figure 4 , in a feasible implementation, the cooling jacket 211 includes a shell 2111, an outer ring 2112 connected to the shell 2111, the outer ring 2112 having one end formed with a water inlet and the other end formed with a water outlet, the outer ring 2112 having a radial passage and an axial passage formed therein, an inner ring 2113, the outer ring 2112 being sleeved on the inner ring 2113, the inner ring 2113 being used for sleeving on the lead screw nut 112, the outer wall of the inner ring 2113 being formed with a double helix structure groove, the cooling passage being formed between the inner ring 2113 and the outer ring 2112 through the double helix structure groove, and a sealing ring 212 arranged between the outer ring 2112 and the inner ring 2113. Through the arrangement of the sealing ring 212, the overflow of the cooling liquid can be avoided, the heat dissipation effect of the lead screw assembly 110 can be guaranteed, and the safe operation of the machine tool can be guaranteed.

[0037] In the technical solution, the structure of the cooling jacket 211 is further provided, and the cooling jacket 211 can include a shell 2111, an outer ring 2112 and an inner ring 2113. The outer ring 2112 is sleeved on the inner ring 2113, and the shell 2111 is sleeved on the outer ring 2112. The outer wall of the inner ring 2113 is provided with a double-helix structure groove, and the outer ring 2112 is provided with a water inlet, a water outlet, a radial passage and an axial passage. When the inner ring 2113 is sleeved on the screw nut 112, the double-helix structure groove of the inner ring 2113 and the inner wall of the outer ring 2112 and the sealing ring 212 form a cooling channel. The cooling liquid output by the water distribution block 240 can enter the outer ring 2112 through the water inlet, and then be supplied to the cooling channel through the radial passage and the axial passage, so as to cool the screw nut 112. The cooling liquid that has completed heat exchange can be discharged to the outside of the cooling jacket 211 through the water outlet, so as to improve the heat dissipation efficiency of the screw nut 112.

[0038] It can be understood that, during assembly of the cooling jacket 211 to the screw nut 112, the shell 2111 of the cooling jacket 211 is tightly fitted with the screw seat, and the inner wall is tightly fitted with the screw nut. During installation, the cooling jacket 211 is installed as a whole on the screw seat, and the coaxiality of the cooling jacket 211 and the screw is detected by a detection rod. After the detection is qualified, the screw body 111 is inserted into the cooling jacket 211, and the screw and the cooling jacket 211 are fixed, thereby completing installation of the cooling jacket 211. When it is necessary to disassemble the moving part from the machine tool, the cooling jacket 211 and the screw nut 112 are only separated, so that the moving part can be disassembled. In an available embodiment, the layout method of the cooling device includes: modularly dividing the machine tool to obtain a plurality of sub-modules; determining a thermal energy symmetry axis of each sub-module; arranging temperature sensors on both sides of the thermal energy symmetry axis of each sub-module; determining a temperature field distribution state of each sub-module based on a detection result of the temperature sensors; and determining a layout mode of the slide rail cooling assembly 220 on each sub-module based on the temperature field distribution state, so that, in a case where the cooling device is turned on, the temperature field of the sub-module is symmetrically distributed along the direction of the symmetry axis.

[0039] In the technical solution, from the perspective of each sub-module of the machine tool, if the sub-modules of the machine tool are unevenly heated, and in combination with the influence of thermal expansion and contraction of the machine tool, the sub-modules of the machine tool can be deformed, thereby affecting the movement accuracy of the transmission component and affecting the machining accuracy. Therefore, in the technical solution, the layout of the cooling device is provided. By determining the layout of the cooling device on the machine tool, the temperature distribution of the temperature field of each sub-module of the machine tool can be made to be close to balanced, the deformation of the sub-module can be balanced, and the machining accuracy can be further improved.

[0040] In the technical solution, when the cooling device is arranged above the machine tool, temperature sensors can be arranged above each sub-module, when the machine tool is in a working state, point temperature values of multiple positions on each sub-module are determined based on the detection results of the temperature sensors, and then based on the relationship between the multiple point temperature values, a temperature field distribution state of each sub-module can be drawn, and finally the arrangement mode of the slide rail cooling assembly 220 is determined based on the temperature field distribution state, which includes but is not limited to the position and depth of the first cooling pipe 221 and the second cooling pipe 222, and can also include the diameter of the first cooling pipe 221 and the second cooling pipe 222. Based on this, when the slide rail cooling assembly 220 is enabled to cool the slide rail assembly 120 above each sub-module, the temperature field of the sub-module can be symmetrically distributed relative to the thermal energy symmetry axis, the deformation of each sub-module can be more balanced, and the machining precision can be ensured.

[0041] It can be understood that the sub-module can be a functional module division of the machine tool, which can include the bed 130, the worktable 140, the column 150, the slide plate, and the spindle box 170, etc. As for the arrangement position of the thermal energy symmetry axis, the thermal energy symmetry axis can be arranged along the length direction of the moving part on the sub-module, such as when the bed 130 is a sub-module, the thermal energy symmetry axis can be arranged along the length direction of the slide rail assembly 120 above the bed 130 and along the middle part of the bed 130, which can make the heating of the bed 130 more balanced, the deformation tends to be balanced, and the machining precision is improved.

[0042] In a feasible implementation, based on the detection results of the temperature sensors, the step of determining the temperature field distribution state of each sub-module includes: determining a plurality of actual detection point values based on the detection results of the temperature sensors; constructing a relationship function based on the actual detection point values; determining a theoretical temperature value of any point on the sub-module based on the relationship function, and determining the temperature field distribution state of each sub-module.

[0043] In the technical solution, specific steps for determining the temperature field distribution state are further provided, based on the plurality of actual detection point values, the temperature relationship between the plurality of actual detection point values can be known, such as the temperature of point A is 60℃, and the detection result of point B is 70℃, so it can be considered that the temperature between point A and point B presents a transition from 60℃ to 70℃, and combined with the detection results of more temperature points, a relationship function can be constructed, and based on the relationship function, the theoretical temperature value of any point can be determined, so that the determination of the temperature value is more accurate.

[0044] In some examples, the relationship function can include the following formula: L=﹛ , , , , , wherein, r i represents a point with radius i, i∈(0, R], wherein R is the circumferential radius of the sub-module perpendicular to the axis, and θ represents the angle with the sub-module axis as the center and 0° axis as the starting point.

[0045] When ∈L, it represents the temperature of point , and each point corresponds to a known temperature represented by , and n is a positive integer;

[0046] represents the temperature of the unknown point, and in the above formula is the temperature of point , and is the temperature of point , and so on, is the temperature of point ; 2 and 1 are the angles of the unknown point with the points on the same radius with the sub-module axis as the center, and 2 and 1 take different values, 2 and 1 are the temperatures of the points, which are known quantities.

[0047] Based on this, by setting the above data set and formula, a relationship function can be formed, and the temperature field distribution state can be determined based on the detection result of the temperature sensor, so that the temperature field distribution state can be quantified, which is convenient for the calculation of the processor. It can be understood that the more the number of temperature sensors used, the more data sets will be obtained, and the determination of the temperature field distribution state will be more accurate.

[0048] In a feasible implementation manner, based on the temperature field distribution state, the step of determining the layout mode of the slide rail cooling assembly 220 on each sub-module includes: based on the temperature field distribution state, determining the depth of the first groove body 1211 and the second groove body 1241 of the slide rail cooling assembly 220, and determining the diameter of the first cooling pipe 221 and the second cooling pipe 222.

[0049] ​In the technical solution, the layout mode of the slide rail cooling assembly 220 is further provided, the depths of the first groove body 1211 and the second groove body 1241 of the slide rail cooling assembly 220 can be determined based on the temperature field distribution state, and the diameters of the first cooling pipe 221 and the second cooling pipe 222 can be determined, for example, for the slide rail cooling assembly 220 near the area with a higher temperature in the temperature field distribution state, the depths of the first groove body 1211 and the second groove body 1241 can be deepened, and the diameters of the first cooling pipe 221 and the second cooling pipe 222 can be increased, so as to improve the heat dissipation capacity of the slide rail cooling assembly 220, so that the temperatures of the various sub-modules of the machine tool tend to be balanced, the deformation difference of the sub-modules can be reduced, and the transmission precision can be ensured, and the machining precision of the components can be improved.

[0050] In an available implementation, the control method of the cooling device includes: determining a current temperature field distribution state of each sub-module based on a detection result of the temperature sensor; and adjusting the supply flow of the cooling liquid of the screw cooling assembly 210 and the slide rail cooling assembly 220 based on the current temperature field distribution state, so that, in the working process of the machine tool, the temperature field of the sub-module is symmetrically distributed along the direction of the symmetry axis, and the temperature is lower than a threshold value.

[0051] In the technical solution, the control mode of the cooling device in the working process is further provided, after the cooling device is arranged based on the temperature field, the current temperature field distribution state of each sub-module can be obtained in real time in the working process of the machine tool, and then the supply flow of the cooling liquid of the screw cooling assembly 210 and the slide rail cooling assembly 220 can be adjusted based on the temperature field distribution state, so that the temperature field of the sub-module is symmetrically distributed along the direction of the symmetry axis, and the sub-module can be cooled, and the machining precision can be further improved, the overall temperature of the sub-module can be monitored in the working process of the machine tool, and then the supply amount of the cooling liquid of the cooling device can be adjusted, so that the supply and cooling of the cooling liquid are more accurate, and the machining precision is further improved.

[0052] In an available implementation, the step of adjusting the supply flow of the cooling liquid of the screw cooling assembly 210 and the slide rail cooling assembly 220 based on the current temperature field distribution state includes: determining a region of the sub-module that needs to be controlled in temperature based on the current temperature field distribution state; obtaining distance information between the region that needs to be controlled in temperature and the slide rail cooling assembly 220; and determining the supply flow of the cooling liquid based on the temperature of the cooling liquid input by the slide rail cooling assembly 220 and the distance information.

[0053] In the technical solution, further specific steps for determining the supply flow of the cooling liquid are provided. The region that needs to be cooled in the current temperature field distribution state and is higher than a preset value can be determined based on the current temperature field distribution state, and then the region that needs to be regulated in temperature is determined. The distance information between the region that needs to be regulated in temperature and the slide rail cooling assembly 220 is obtained. Finally, the supply flow of the cooling liquid can be determined based on the temperature of the cooling liquid and the distance information. It can be understood that the supply flow of the cooling liquid is proportional to the distance information and the temperature of the cooling liquid, that is, the greater the value of the distance information, the greater the supply flow of the cooling liquid, and the higher the temperature of the cooling liquid, the greater the supply flow of the cooling liquid. Therefore, the temperature of the region that needs to be regulated in temperature can be accurately adjusted, so that the thermal energy distribution on the sub-module tends to be balanced, and the probability of deformation of the multiple sub-modules of the machine tool is reduced.

[0054] As shown in Figures 1 to 5 According to the second aspect of the embodiments of the present application, a machine tool is provided, which comprises the cooling device for a machine tool according to any of the above technical solutions, a bed body 130, a worktable 140 slidably connected to the bed body 130 through a first slide rail assembly 120, a column 150 connected to the bed body 130, a slide plate 160 slidably connected to the column 150 through a second slide rail assembly 120 and a first lead screw assembly 110, and a spindle box 170 slidably connected to the slide plate 160 through a third slide rail assembly 120 and a second lead screw assembly 110.

[0055] The machine tool provided by the embodiments of the present application comprises the cooling device for a machine tool according to any of the above technical solutions, so the machine tool has all the beneficial effects of the cooling device for a machine tool according to the above technical solutions, which will not be repeated here.

[0056] The machine tool provided by the embodiments of the present application comprises the bed body 130, the worktable 140, the column 150, the slide plate 160, and the spindle box 170. Based on this, a workpiece to be machined can be arranged on the worktable 140. Then, the spindle box 170 can be moved relative to the worktable 140 through the slide plate 160 and the column 150. Therefore, a tool on the spindle box 170 can machine the workpiece. The cooling device can cool the first slide rail assembly 120, the second slide rail assembly 120, the first lead screw assembly 110, the third slide rail assembly 120, and the second lead screw assembly 110.

[0057] In the present application, the terms "first", "second", "third" are only used for descriptive purpose, and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "connection", "fix", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the present application.

[0059] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cooling device for machine tools, characterized in that, The machine tool includes a lead screw assembly and a slide rail assembly. The lead screw assembly includes a lead screw body and a lead screw nut sleeved on the lead screw body. The slide rail assembly includes a base and a guide rail, the guide rail being connected to the base. The cooling device includes: A lead screw cooling assembly, comprising: a cooling sleeve, the cooling sleeve being fitted onto the lead screw nut; A slide rail cooling assembly, the slide rail cooling assembly comprising: a first cooling pipe, the first cooling pipe being embedded in the base; A water chiller and multiple water distribution blocks are provided. The water chiller is used to store coolant and is connected to the water distribution blocks via pipes. Each lead screw cooling assembly is connected to at least one water distribution block, and each slide rail cooling assembly is connected to at least one water distribution block.

2. The cooling device for machine tools according to claim 1, characterized in that, A first groove is formed on the base, and the first cooling pipe is disposed in the first groove.

3. The cooling device for machine tools according to claim 1, characterized in that, The slide rail cooling assembly also includes: The second cooling pipe, the slide rail assembly further includes: a slider and a working part, the slider being slidably connected to the guide rail, and the working part being connected to the slider; A second groove is formed on the side of the workpiece facing the slider, and the second cooling pipe is disposed in the second groove.

4. The cooling device for machine tools according to claim 1, characterized in that, The cooling jacket includes: case; An outer ring is connected to the housing. One end of the outer ring has a water inlet, and the other end has a water outlet. A radial passage and an axial passage are formed inside the outer ring. The inner ring is fitted with an outer ring, which is used to fit the lead screw nut. The outer wall of the inner ring has a double helix groove, and a cooling passage is formed between the inner ring and the outer ring through the double helix groove. A sealing ring is disposed between the outer ring and the inner ring.

5. The cooling device for machine tools according to claim 3, characterized in that, The layout method of the cooling device includes: The machine tool is modularized to obtain multiple sub-modules; Determine the thermal symmetry axis of each of the sub-modules; Temperature sensors are installed on both sides of the thermal symmetry axis of each submodule; Based on the detection results of the temperature sensor, the temperature field distribution state of each sub-module is determined; Based on the temperature field distribution, the layout of the slide rail cooling assembly on each sub-module is determined so that when the cooling device is turned on, the temperature field of the sub-module is symmetrically distributed along the axis of symmetry.

6. The cooling device for machine tools according to claim 5, characterized in that, The step of determining the temperature field distribution state of each sub-module based on the detection results of the temperature sensor includes: Based on the detection results of the temperature sensor, multiple actual detection point values ​​are determined; A relational function is constructed based on the actual detection point values; Based on the relationship function, the theoretical temperature value at any point on the submodule is determined, and the temperature field distribution state of each submodule is determined.

7. The cooling device for machine tools according to claim 6, characterized in that, The step of determining the layout of the slide rail cooling assembly on each sub-module based on the temperature field distribution includes: Based on the temperature field distribution, the depths of the first and second tanks of the slide rail cooling assembly are determined, and the diameters of the first and second cooling pipes are determined.

8. The cooling device for machine tools according to claim 5, characterized in that, The control method for the cooling device includes: Based on the detection results of the temperature sensor, the current temperature field distribution state of each sub-module is determined; Based on the current temperature field distribution, the supply flow rate of the coolant to the lead screw cooling assembly and the slide rail cooling assembly is adjusted so that when the machine tool is working, the temperature field of the submodule is symmetrically distributed along the axis of symmetry and the temperature is below a threshold.

9. The cooling device for machine tools according to claim 8, characterized in that, The step of adjusting the coolant supply flow rate of the lead screw cooling assembly and the slide rail cooling assembly based on the current temperature field distribution includes: Based on the current temperature field distribution, determine the area on the submodule where the temperature needs to be regulated; Obtain the distance information between the area requiring temperature regulation and the slide rail cooling assembly; Based on the temperature of the coolant input from the slide rail cooling assembly and the distance information, the supply flow rate of the coolant is determined.

10. A machine tool, characterized in that, A cooling device for machine tools as described in any one of claims 1 to 9; Bed frame; A workbench, which is slidably connected to the bed via a first slide rail assembly; A column, which is connected to the bed frame; A skateboard, wherein the skateboard is slidably connected to the column via a second slide rail assembly and a first lead screw assembly; The spindle box is slidably connected to the slide plate via a third slide rail assembly and a second lead screw assembly.

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