Cooling device for machine tools and machine tool

Abstract

The embodiment of the application relates to the technical field of parts, components or accessories of machine tools, and discloses a cooling device applied to a machine tool and the machine tool, wherein the cooling device comprises a screw rod cooling assembly, a slide rail cooling assembly, a water cooling machine and multiple water distribution blocks, the screw rod cooling assembly comprises a cooling jacket, the cooling jacket cools screw nut of the screw rod assembly, reduces heat of the screw nut, and simultaneously reduces or avoids heat energy of the screw nut from being transmitted to surrounding parts of the machine tool; for the slide rail assembly, cooling liquid output by the water cooling machine 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, heat energy of the base is reduced, and simultaneously, heat energy of the base is reduced or avoided from being transmitted to surrounding parts of the machine tool. Movement deformation of the machine tool can be prevented, precision and stability of the machine tool can be ensured, and machining precision is improved.

Description

Technical Field

[0001] This application relates to the technical field of machine tool parts, components or accessories, and in particular to a cooling device and machine tool. Background Technology

[0002] Five-axis machining centers are high-end products in the machine tool industry, requiring very high machining accuracy. During operation, various factors can affect the accuracy of a five-axis machining center. Among these, the thermal deformation of machine tool transmission components, such as lead screws and guideways, is a common factor impacting machine tool accuracy. Therefore, controlling the temperature of transmission components like lead screws and guideways is an effective way to improve machine tool accuracy. Currently, there are two methods for lead screw cooling. One is to use hollow water-cooled lead screws, where cooling water flows through the center of the lead screw to carry away its heat. However, in a lead screw pair, the heat generated by the nut is much greater than that of the lead screw itself. Therefore, a more effective method is to cool the nut. Furthermore, due to the high-speed rotation of the lead screw, hollow water-cooled lead screws require a rotary sealing device, which is also the most prone to failure. The second method is to use water-cooled nuts, but water-cooled nut products are rare, mainly because the nut cooling structure is complex and costly. Moreover, due to the limitations of the nut structure, nut cooling cannot be achieved in some high-load-bearing lead screws, such as double-nut preloaded lead screws. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

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

[0005] Therefore, a first aspect of the present invention provides a cooling device for machine tools.

[0006] A second aspect of the present invention provides a machine tool.

[0007] In view of this, a cooling device for a machine tool is provided according to a first aspect of the embodiments of this application. 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 connected to the base. The cooling device includes:

[0008] A lead screw cooling assembly, comprising: a cooling sleeve, the cooling sleeve being fitted onto the lead screw nut;

[0009] A slide rail cooling assembly, the slide rail cooling assembly comprising: a first cooling pipe, the first cooling pipe being embedded in the base;

[0010] 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.

[0011] In one feasible implementation, a first groove is formed on the base, and the first cooling pipe is disposed in the first groove.

[0012] In one feasible implementation, the slide rail cooling assembly further includes:

[0013] 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;

[0014] 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.

[0015] In one feasible implementation, the cooling jacket includes:

[0016] case;

[0017] 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.

[0018] 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.

[0019] A sealing ring is disposed between the outer ring and the inner ring.

[0020] In one feasible implementation, the arrangement method of the cooling device includes:

[0021] The machine tool is modularized to obtain multiple sub-modules;

[0022] Determine the thermal energy symmetry axis of each of the sub-modules;

[0023] Temperature sensors are installed on both sides of the thermal symmetry axis of each submodule;

[0024] Based on the detection results of the temperature sensor, the temperature field distribution state of each sub-module is determined;

[0025] 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.

[0026] In one feasible implementation, the step of determining the temperature field distribution state of each sub-module based on the detection results of the temperature sensor includes:

[0027] Based on the detection results of the temperature sensor, multiple actual detection point values ​​are determined;

[0028] A relational function is constructed based on the actual detection point values;

[0029] 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.

[0030] In one feasible implementation, the step of determining the layout of the slide rail cooling assembly on each of the sub-modules based on the temperature field distribution includes:

[0031] 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.

[0032] In one feasible implementation, the control method of the cooling device includes:

[0033] Based on the detection results of the temperature sensor, the current temperature field distribution state of each sub-module is determined;

[0034] 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.

[0035] In one feasible implementation, 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:

[0036] Based on the current temperature field distribution, determine the area on the submodule where the temperature needs to be regulated;

[0037] Obtain information on the distance between the area requiring temperature control and the slide rail cooling components;

[0038] 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.

[0039] A machine tool is provided according to a second aspect of the embodiments of this application, comprising:

[0040] Cooling devices applied to machine tools as described in any of the above technical solutions;

[0041] Bed frame;

[0042] A workbench, which is slidably connected to the bed via a first slide rail assembly;

[0043] A column, which is connected to the bed frame;

[0044] A skateboard, wherein the skateboard is slidably connected to the column via a second slide rail assembly and a first lead screw assembly;

[0045] The spindle box is slidably connected to the slide plate via a third slide rail assembly and a second lead screw assembly.

[0046] Compared with the prior art, the present invention has at least the following beneficial effects:

[0047] The cooling device for machine tools provided in this application includes a lead screw cooling assembly, a slide rail cooling assembly, a water chiller, and multiple water distribution blocks. The lead screw cooling assembly includes a cooling jacket, and the slide rail cooling assembly includes a first cooling pipe. Therefore, during the operation of the machine tool, especially a five-axis machining center, the cooling device provided in this application can cool the moving parts of the machine tool. These moving parts may include the lead screw assembly and the slide rail assembly. For the lead screw assembly, the coolant supplied by the water chiller can be supplied to the cooling jacket of the lead screw cooling assembly through the water distribution blocks. The cooling jacket cools the lead screw nut on the lead screw assembly, reducing the heat of the lead screw nut and simultaneously reducing or preventing the heat energy of the lead screw nut from being transferred to surrounding parts on the machine tool. For the slide rail assembly, the coolant output from the water chiller can be supplied to the first cooling pipe of the slide rail cooling assembly through the water distribution blocks, and the first cooling pipe cools the base, reducing the heat energy of the base and simultaneously reducing or preventing the heat energy of the base from being transferred to surrounding parts on the machine tool. This prevents deformation of the machine tool, ensures the accuracy and stability of the machine tool, and improves machining accuracy.

[0048] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0049] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0050] Figure 1 A schematic structural diagram illustrating the arrangement relationship between a lead screw cooling assembly and a lead screw assembly in a cooling device for a machine tool, according to an embodiment of this application.

[0051] Figure 2 A partially enlarged schematic structural diagram showing the arrangement relationship between a lead screw cooling assembly and a lead screw assembly in a cooling device for a machine tool according to an embodiment of this application;

[0052] Figure 3 A schematic structural diagram illustrating the arrangement relationship between the slide rail cooling assembly and the slide rail assembly in a cooling device for a machine tool according to an embodiment of this application;

[0053] Figure 4 A schematic structural diagram of a machine tool according to an embodiment of this application;

[0054] Figure 5 A schematic structural diagram of a machine tool with concealed water chiller and piping, provided for an embodiment of this application.

[0055] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0056] 110 lead screw assembly, 120 slide rail assembly, 130 bed, 140 worktable, 150 column, 160 slide plate, 170 spindle box;

[0057] 111 Lead screw body, 112 Lead screw nut, 121 Base, 122 Guide rail, 123 Slider, 124 Working part, 1211 First groove, 1241 Second groove;

[0058] 210 lead screw cooling assembly, 220 slide rail cooling assembly, 230 water chiller, 240 water distribution block;

[0059] 211 Cooling jacket, 212 Sealing ring, 2111 Housing, 2112 Outer ring, 2113 Inner ring;

[0060] 221 First cooling pipe, 222 Second cooling pipe. Detailed Implementation

[0061] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0062] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0063] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0064] like Figures 1 to 5 As shown, a cooling device for a machine tool is proposed according to a first aspect of the present application. The machine tool includes a lead screw assembly 110 and a slide rail assembly 120. The lead screw assembly 110 includes a lead screw body 111 and a lead screw nut 112 sleeved on the lead screw body 111. The slide rail assembly 120 includes a base 121 and a guide rail 122, with the guide rail 122 connected to the base 121. The cooling device includes a lead screw cooling assembly 210, which includes a cooling sleeve 211 for cooling... The sleeve 211 is fitted onto the lead screw nut 112; the slide rail cooling assembly 220 includes: a first cooling pipe 221, which is embedded in the base 121; a water chiller 230 and multiple water distribution blocks 240, the water chiller 230 is used to store coolant, and the water chiller 230 is connected to the water distribution blocks 240 through pipes. Each lead screw cooling assembly 210 is connected to at least one water distribution block 240, and each slide rail cooling assembly 220 is connected to at least one water distribution block 240.

[0065] The cooling device for machine tools provided in this application embodiment includes a lead screw cooling assembly 210, a slide rail cooling assembly 220, a water chiller 230, and multiple water distribution blocks 240. The lead screw cooling assembly 210 includes a cooling jacket 211, and the slide rail cooling assembly 220 includes a first cooling pipe 221. Based on this, during the operation of the machine tool, especially when the machine tool of the five-axis machining center is working, the cooling device for the machine tool provided in this application embodiment can cool the moving parts of the machine tool. The moving parts may include the lead screw assembly 110 and the slide rail assembly 120. For the lead screw assembly 110, the coolant supplied by the water chiller 230 can be supplied to the cooling jacket 211 of the lead screw cooling assembly 210 through the water distribution block 240. The cooling jacket 211 cools the lead screw nut 112 on the lead screw assembly 110, reducing the heat of the lead screw nut 112, and at the same time reducing or preventing the heat energy of the lead screw nut 112 from being transferred to the surrounding parts of the machine tool. For the slide rail assembly 120, the coolant output by the water chiller 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, reducing the heat energy of the base 121, and at the same time reducing or preventing the heat energy of the base 121 from being transferred to the surrounding parts of the machine tool. It can prevent the deformation of the machine tool during movement, ensure the accuracy and stability of the machine tool, and improve machining accuracy.

[0066] The cooling device for machine tools provided in this application embodiment can cool the moving parts of the machine tool through the lead screw cooling assembly 210 and the slide rail cooling assembly 220, which can reduce the probability of deformation of the moving parts of the machine tool and prevent heat energy from being transferred to other parts on the machine tool, thereby reducing the probability of the machine tool as a whole being deformed by heat energy and ensuring the machining accuracy.

[0067] The cooling device for machine tools provided in this application takes into account that, during the operation of the lead screw assembly 110, the heat energy generated by the lead screw nut 112 is much greater than that of the lead screw body 111. By fitting a cooling sleeve 211 over the lead screw nut 112, the heat energy of the lead screw nut 112, which is greater, can be directly cooled, thus better preventing deformation of the lead screw assembly 110 and preventing heat energy from being transferred to other components.

[0068] like Figure 3 As shown, in one feasible embodiment, a first groove 1211 is formed on the base 121, and a first cooling pipe 221 is disposed in the first groove 1211.

[0069] In this technical solution, a further provision is provided regarding the arrangement of the first cooling pipe 221. The first cooling pipe 221 is arranged within the base 121 through the first groove 1211, so that the first cooling pipe 221 can be embedded within the base 121. On the one hand, this increases the contact area between the first cooling pipe 221 and the base 121; on the other hand, it does not change the appearance of the base 121, which facilitates the layout of other components of the machine tool.

[0070] like Figure 3 As shown, in one feasible embodiment, the slide rail cooling assembly 220 further includes a second cooling pipe 222, and the slide rail assembly 120 further includes a slider 123 and a working member 124. The slider 123 is slidably connected to the guide rail 122, and the working member 124 is connected to the slider 123. A second groove 1241 is formed on the side of the working member 124 facing the slider 123, and the second cooling pipe 222 is used to be disposed in the second groove 1241.

[0071] In this technical solution, considering that the slide rail assembly 120 on the machine tool needs to drive the workpiece 124 to move through the slider 123, a second groove 1241 can be opened on the side of the workpiece 124 facing the slider 123, and then a second cooling pipe 222 is set in the second groove 1241. The second cooling pipe 222 can cool the slider 123 and the workpiece 124, and can further avoid or reduce the heat generated by the slide rail assembly 120 during operation from being transferred to the workpiece 124, thereby further ensuring the machining accuracy.

[0072] In some examples, the first cooling pipe 221 and the second cooling pipe 222 can both be made of copper. This arrangement facilitates the bending of the first cooling pipe 221 and the second cooling pipe 222, while improving the heat conduction efficiency.

[0073] In some examples, the workpiece 124 may include components such as the machine tool slide or spindle box 170 connected to the slider 123.

[0074] In some examples, the water distribution block 240 can be a metal block with a single channel branching into multiple channels, mainly used for distributing coolant. The water distribution block 240 can be arranged near the lead screw cooling assembly 210 or the slide rail cooling assembly 220 to facilitate the supply of coolant.

[0075] In some examples, the machine tool often involves the use of a water chiller 230 during operation. For instance, the machine tool needs to use the coolant output from the water chiller 230 to cool and clean the cutting head. Therefore, the cooling device for machine tools provided in this application embodiment can utilize the water chiller 230 on the machine tool and the pipeline used to supply coolant to the lead screw cooling assembly 210 or the slide rail cooling assembly 220. It can be laid out synchronously with other lines on the machine tool. Therefore, when the cooling device is applied to the machine tool, it is convenient to assemble the cooling device and does not require a large-scale change to the structure of the machine tool, and has high application prospects.

[0076] like Figure 1 , Figure 2 and Figure 4 As shown, in one feasible embodiment, the cooling jacket 211 includes: a housing 2111; an outer ring 2112 connected to the housing 2111, with an inlet at one end and an outlet at the other, and radial and axial passages formed within the outer ring 2112; an inner ring 2113 on which the outer ring 2112 is fitted, and the inner ring 2113 is fitted onto the lead screw nut 112, with a double-helix groove formed on the outer wall of the inner ring 2113, forming a cooling passage between the inner ring 2113 and the outer ring 2112 through the double-helix groove; and a sealing ring 212 disposed between the outer ring 2112 and the inner ring 2113. The sealing ring 212 prevents coolant overflow, ensuring the heat dissipation effect of the lead screw assembly 110 and the safe operation of the machine tool.

[0077] In this technical solution, the structure of the cooling jacket 211 is further provided. The cooling jacket 211 may include a shell 2111, an outer ring 2112, and an inner ring 2113. The outer ring 2112 is fitted onto the inner ring 2113, and the shell 2111 is fitted onto the outer ring 2112. A double-helix groove is formed on the outer wall of the inner ring 2113. An inlet, an outlet, a radial passage, and an axial passage are formed on the outer ring 2112. When the inner ring 2113 is fitted onto the lead screw nut 112, the inner ring... The double helix groove of 2113, the inner wall of the outer ring 2112, and the sealing ring 212 can form a cooling channel. Based on this, the coolant output by the water distribution block 240 can enter the outer ring 2112 through the inlet, and then be supplied to the cooling channel through the radial and axial passages, which can cool the lead screw nut 112. The coolant that has completed heat exchange can be discharged to the outside of the cooling jacket 211 through the outlet, thereby improving the efficiency of heat dissipation for the lead screw nut 112.

[0078] Understandably, during the assembly of the cooling sleeve 211 to the lead screw nut 112, the housing 2111 of the cooling sleeve 211 fits tightly with the lead screw nut seat, and the inner wall fits tightly with the lead screw nut. During installation, the cooling sleeve 211 is first installed as a whole on the lead screw nut seat. The coaxiality of the cooling sleeve 211 and the lead screw nut is checked using a test bar. After passing the check, the lead screw body 111 is inserted into the cooling sleeve 211, and the lead screw nut is fixed to the cooling sleeve 211, completing the installation of the cooling sleeve 211. When it is necessary to disassemble the moving part from the machine tool, simply separating the cooling sleeve 211 from the lead screw nut 112 is sufficient to disassemble the moving part.

[0079] In one feasible implementation, the layout method of the cooling device includes: modularizing the machine tool to obtain multiple sub-modules; determining the thermal energy symmetry axis of each sub-module; setting temperature sensors on both sides of the thermal energy symmetry axis of each sub-module; determining the temperature field distribution state of each sub-module based on the detection results of the temperature sensors; and determining the layout of the slide rail cooling assembly 220 on each sub-module based on the temperature field distribution state, so that when the cooling device is turned on, the temperature field of the sub-module is symmetrically distributed along the direction of the symmetry axis.

[0080] In this technical solution, considering the various sub-modules of the machine tool, if the sub-modules are heated unevenly, combined with the effects of thermal expansion and contraction, the sub-modules may deform, thus affecting the motion accuracy of the transmission components and machining accuracy. Based on this, the technical solution provides a layout for the cooling device. By determining the layout of the cooling device on the machine tool, the temperature distribution of the temperature field in each sub-module can be made more uniform, resulting in more even deformation of the sub-modules and further improving machining accuracy.

[0081] In this technical solution, when the cooling device is arranged on the machine tool, temperature sensors can be installed on each sub-module. When the machine tool is in operation, the temperature values ​​at multiple locations on each sub-module are determined based on the detection results of the temperature sensors. Then, based on the relationship between the multiple temperature values, the temperature field distribution of each sub-module can be plotted. Finally, the layout of the slide rail cooling assembly 220 is determined based on the temperature field distribution. The layout includes, but is not limited to, the position and depth of the first cooling pipe 221 and the second cooling pipe 222, as well as 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 used to cool the slide rail assembly 120 on each sub-module, the temperature field of the sub-module can be made to be nearly symmetrically distributed with respect to the thermal energy symmetry axis, making the deformation of each sub-module more balanced, thereby ensuring machining accuracy.

[0082] Understandably, a submodule can be a functional module division of a machine tool, such as including a bed 130, a worktable 140, a column 150, a slide plate, and a spindle box 170, etc. As for the arrangement of the thermal symmetry axis, the thermal symmetry axis can be arranged along the length of the moving parts on the submodule. For example, when the bed 130 is a submodule, the thermal symmetry axis can be arranged along the length of the slide rail assembly 120 above the bed 130 and along the middle of the bed 130, which can make the heating of the bed 130 more uniform, the deformation closer to uniform, and improve the machining accuracy.

[0083] In one feasible implementation, the step of determining the temperature field distribution state of each submodule based on the detection results of the temperature sensor includes: determining multiple actual detection point values ​​based on the detection results of the temperature sensor; constructing a relational function based on the actual detection point values; and determining the theoretical temperature value of any point on the submodule based on the relational function, thereby determining the temperature field distribution state of each submodule.

[0084] This technical solution further provides specific steps for determining the temperature field distribution. Based on multiple actual detection point values, the temperature relationship between these points can be determined. For example, if the temperature at point A is 60℃ and the detection result at point B is 70℃, then the temperature between point A and point B can be considered to transition from 60℃ to 70℃. By combining the detection results of more temperature points, a relationship function can be constructed. Based on this relationship function, the theoretical temperature value at any point can be determined, making the determination of temperature values ​​more accurate.

[0085] In some examples, the relational function may include the following formula:

[0086] L=﹛ , , , , , ﹜

[0087] Where, r i Let θ represent a point with radius i, i∈(0,R], where R is the circumference radius of the submodule perpendicular to the axis, and θ represents the angle between the submodule axis and the 0° axis.

[0088] when When ∈L, it represents a point The temperature is known, and each point corresponds to a known temperature using [a specific method / method]. This means that n takes the value of a positive integer;

[0089]

[0090] The above formula represents the temperature at an unknown point. For point temperature, For point And so on. For point Temperature; 2 and 1 represents the angle between the unknown point and a point on the same radius as the submodule axis. 2 and 1. Different values, 2 and The temperature at point 1 is a known quantity.

[0091] Based on this, by setting up the aforementioned dataset and formulas, a relational function can be constructed. This allows for the determination of the temperature field distribution based on the temperature sensor's detection results, quantifying the temperature field distribution and facilitating processor calculations. It is understandable that the more temperature sensors used, the richer the dataset will be, and the more accurate the determination of the temperature field distribution will be.

[0092] In one feasible implementation, the step of determining the layout of the slide rail cooling assembly 220 on each sub-module based on the temperature field distribution includes: determining the depth of the first groove 1211 and the second groove 1241 of the slide rail cooling assembly 220 based on the temperature field distribution, and determining the diameter of the first cooling pipe 221 and the second cooling pipe 222.

[0093] In this technical solution, a layout of the slide rail cooling assembly 220 is further provided. The depth of the first groove 1211 and the second groove 1241 of the slide rail cooling assembly 220 can be determined based on the temperature field distribution, and the diameter 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 high temperature area in the temperature field distribution, the depth of the first groove 1211 and the second groove 1241 can be deepened, and the diameter of the first cooling pipe 221 and the second cooling pipe 222 can be increased to improve the heat dissipation capacity of the slide rail cooling assembly 220, so that the temperature of each sub-module of the machine tool is closer to uniform, which can reduce the deformation difference of the sub-module, thereby ensuring transmission accuracy and improving the machining accuracy of the components.

[0094] In one feasible implementation, the control method of the cooling device includes: determining the current temperature field distribution state of each sub-module based on the detection results of the temperature sensor; and adjusting the supply flow rate of the coolant in the lead screw cooling assembly 210 and the slide rail cooling assembly 220 based on the current temperature field distribution state, so that when the machine tool is working, the temperature field of the sub-module is symmetrically distributed along the direction of the axis of symmetry and the temperature is below a threshold.

[0095] This technical solution further provides a control method for the cooling device during operation. After the cooling device is arranged based on the temperature field, the current temperature field distribution of each sub-module can be acquired in real time during machine tool operation. Then, the supply flow rate of coolant to the lead screw cooling assembly 210 and slide rail cooling assembly 220 can be adjusted based on the temperature field distribution, so that the temperature field of the sub-module is symmetrically distributed along the axis of symmetry, and the sub-module can be cooled, thereby further improving machining accuracy. During machine tool operation, the overall temperature of the sub-module can be monitored, and the supply of coolant to the cooling device can be adjusted, making the supply and cooling of coolant more precise, and further improving machining accuracy.

[0096] In one feasible implementation, the step of adjusting the coolant supply flow rate of the lead screw cooling assembly 210 and the slide rail cooling assembly 220 based on the current temperature field distribution includes: determining the area on the submodule where the temperature needs to be regulated based on the current temperature field distribution; obtaining the distance information between the area where the temperature needs to be regulated and the slide rail cooling assembly 220; and determining the coolant supply flow rate based on the coolant temperature and distance information input by the slide rail cooling assembly 220.

[0097] This technical solution further provides specific steps for determining the coolant supply flow rate. Based on the current temperature field distribution, it identifies areas in the current temperature field that are higher than a preset value and require cooling, thereby determining the areas where temperature needs to be regulated. It then obtains the distance information between the areas requiring temperature regulation and the slide rail cooling assembly 220. Finally, based on the coolant temperature and distance information, it determines the coolant supply flow rate. It is understood that the coolant supply flow rate is directly proportional to the distance information and the coolant temperature; that is, the larger the distance value, the larger the coolant supply flow rate. Similarly, the higher the coolant temperature, the larger the coolant supply flow rate. This allows for precise temperature adjustment of the areas requiring temperature regulation, making the heat distribution on the sub-modules more even and reducing the probability of deformation of multiple sub-modules of the machine tool.

[0098] like Figures 1 to 5 As shown, a machine tool is provided according to a second aspect of the embodiments of this application, comprising: a cooling device for the machine tool as described in any of the above technical solutions; a bed 130; a worktable 140, the worktable 140 being slidably connected to the bed 130 via a first slide rail assembly 120; a column 150, the column 150 being connected to the bed 130; a slide plate 160, the slide plate 160 being slidably connected to the column 150 via a second slide rail assembly 120 and a first lead screw assembly 110; and a spindle box 170, the spindle box 170 being slidably connected to the slide plate 160 via a third slide rail assembly 120 and a second lead screw assembly 110.

[0099] The machine tool provided in this application embodiment includes a cooling device applied to the machine tool as described in any of the above technical solutions. Therefore, the machine tool has all the beneficial effects of the cooling device applied to the machine tool as described in the above technical solutions, which will not be elaborated here.

[0100] The machine tool provided in this application embodiment includes a bed 130, a worktable 140, a column 150, a slide plate 160, and a spindle box 170. Based on this, a workpiece to be processed can be placed on the worktable 140, and then the spindle box 170 can move relative to the worktable 140 through the slide plate 160 and the column 150, so that the cutting tool on the spindle box 170 can process the workpiece. A 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.

[0101] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0102] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," 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 unit 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.

[0103] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0104] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

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. The water chiller is connected to the water distribution blocks through pipes. Each lead screw cooling assembly is connected to at least one water distribution block. Each slide rail cooling assembly is connected to at least one water distribution block. The slide rail cooling assembly further 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; Wherein, a second groove is formed on the side of the workpiece facing the slider, and the second cooling pipe is used to be disposed in the second groove; 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.

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 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.

4. The cooling device for machine tools according to claim 1, 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.

5. The cooling device for machine tools according to claim 4, 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.

6. The cooling device for machine tools according to claim 4, 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.

7. The cooling device for machine tools according to claim 6, 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.

8. A machine tool, characterized in that, A cooling device for machine tools as described in any one of claims 1 to 7; 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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