Integrated cooling slide and CNC machining center

Abstract

The utility model discloses an integrated cooling type slide and numerical control machining center relates to numerical control machine tool and its thermal management technical field. The integrated cooling type slide includes sheet type slide, and its core innovation lies in built -in cooling medium flow channel system and cooling liquid sealing system. Cooling medium flow channel system contains the serpentine fluid passage of being set up on sheet type slide, and the channel is equipped with import and export, and import and export install pipe joint to connect the hose of external refrigerating unit and form closed -cycle circulation, can high -efficiently absorb the heat of guide rail friction and the heat of drive motor, and cooling liquid sealing system is by serpentine sealing rubber strip, O -ring and sealing pressboard, and the sealing pressboard is locked by torque wrench and makes sealing ring compression deformation and forms sealing area, effectively prevents the leakage of cooling liquid. The slide compact structure, heat exchange efficiency is high, can inhibit thermal deformation obviously, is applicable to the high -precision precision machining scene of various numerical control machining center.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tools and their thermal management technology, specifically to an integrated cooling slide structure for CNC machining centers and a CNC machining center including the same. Background Technology

[0002] Against the backdrop of rapid development in modern manufacturing technology, CNC machining centers are constantly advancing towards higher speeds and higher precision. Among these components, the slide, as a key moving part connecting the machine bed and the crossbeam, directly affects the machining accuracy and stability of the entire machine. Traditional CNC machining center slides are mostly made of cast iron; however, under high-speed operating conditions, traditional cast iron slides face severe challenges in terms of thermal stability.

[0003] The continuous friction between the guide rail and the slider generates extremely high heat flux density. In addition, the large amount of radiant heat generated by the single-sided dual-drive motor mounted on the slide is conducted to the slide body, causing a rapid increase in temperature. This temperature rise triggers thermal deformation in the slide itself and connected components such as the crossbeam and bed. This thermal deformation directly affects the relative positional accuracy between the tool and the workpiece, leading to quality problems such as dimensional errors and shape deviations in the machined parts. In severe cases, it can even cause parts to be scrapped, resulting in significant economic losses to production.

[0004] To address the issue of thermal deformation in slide blocks, various technical solutions have been explored within the industry, but all have limitations. Some solutions enhance heat dissipation by increasing the heat dissipation area of ​​the slide block, such as by adding dense reinforcing ribs. However, while this method increases the heat dissipation area to some extent, it also increases the size and weight of the slide block, increasing material costs and manufacturing complexity. Furthermore, it negatively impacts the dynamic performance of the slide block, leading to a decrease in the response speed of the equipment.

[0005] Another common method is to use external localized spray cooling, which involves spraying coolant onto specific areas of the slide to lower the temperature. However, this localized cooling method can only cool the surface of the slide and cannot penetrate into the heat-concentrated internal areas, resulting in limited cooling effectiveness. More importantly, localized spraying can create a large temperature gradient between different parts of the slide, which can exacerbate thermal deformation and further affect machining accuracy.

[0006] Some solutions opt to directly purchase drive motors with water-cooling capabilities, attempting to reduce heat generation at the heat source. However, the cost of such water-cooled motors is significantly higher than that of ordinary motors, substantially increasing the equipment's manufacturing cost. Furthermore, the installation and maintenance of water-cooled motors are more complex, requiring additional piping connections and sealing measures, increasing the equipment's failure rate and maintenance workload.

[0007] Furthermore, with the increasing demands for dynamic performance in CNC machining centers, some slides have adopted lightweight welded structures. While this structure reduces the weight of the slide and improves the dynamic response speed of the equipment, it significantly weakens the thermal rigidity of the slide. Reduced thermal rigidity makes the slide more susceptible to deformation under temperature changes, further exacerbating the impact of thermal deformation on machining accuracy.

[0008] Therefore, developing a slide structure that can efficiently dissipate heat, effectively suppress thermal deformation, has a compact structure, and is cost-effective has become a technical challenge that urgently needs to be solved in the field of CNC machining centers. Utility Model Content

[0009] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this utility model is how to effectively reduce the temperature rise of the slide of the CNC machining center during high-speed operation, suppress thermal deformation, improve machining accuracy, and at the same time take into account the compact structure, reasonable cost and convenient maintenance.

[0010] To achieve the above objectives, this utility model provides an integrated cooling slide, including a thin plate slide, and also includes a built-in cooling medium flow channel system and a coolant sealing system;

[0011] The cooling medium flow channel system includes a serpentine fluid channel formed on a thin-plate slide. The serpentine fluid channel has an inlet and an outlet. Pipe fittings are installed at the inlet and outlet respectively. The pipe fittings are used to connect the rubber hoses of an external refrigeration unit to form a closed-loop circulation.

[0012] The coolant sealing system includes a serpentine sealing strip surrounding the periphery of the serpentine fluid channel, an O-ring located at the threaded hole inside the serpentine fluid channel, and a sealing pressure plate for pressing the serpentine sealing strip and the O-ring. The sealing pressure plate is fixedly connected to a thin-plate slide to form a sealing area.

[0013] Preferably, there are two serpentine fluid channels, which are independent of each other, and each serpentine fluid channel has an inlet and an outlet.

[0014] Preferably, the sealing plate is locked to the thin-plate slide by a torque wrench, causing the serpentine sealing strip and O-ring to undergo compression deformation.

[0015] Preferably, the temperature change of the coolant in the closed-loop cycle is controlled within ±1℃.

[0016] Preferably, the cooling medium is a coolant with anti-rust and antifreeze functions.

[0017] Preferably, the O-ring is made of an oxidation-resistant and corrosion-resistant material.

[0018] Preferably, the pipe fitting is an R-threaded fitting with sealant.

[0019] Preferably, the hose is an integrated hose assembly.

[0020] Preferably, the thin-plate slide is provided with a tapered locating pin, which is used for positioning and connecting with the crossbeam or column of the CNC machining center.

[0021] Preferably, the thin-plate slide is provided with an adjustment mechanism, which is used to adjust the installation position of the drive motor.

[0022] This utility model also provides a CNC machining center, including a bed component and a crossbeam component, and also includes the aforementioned integrated cooling slide, which is connected between the bed component and the crossbeam component.

[0023] The beneficial technical effects of this utility model are as follows:

[0024] (1) In the cooling medium flow channel system of this utility model, the serpentine fluid channel is directly opened on the thin plate slide, flowing through the installation area of ​​the guide rail slider and the periphery of the drive motor. It can directly absorb the heat generated by the friction of the guide rail and the radiant heat generated when the drive motor is working, making the cooling method more direct and efficient. Compared with the traditional external local spray cooling method, the heat exchange efficiency is increased by more than 60%, which can quickly reduce the temperature of the slide and effectively suppress thermal deformation.

[0025] (2) By controlling the temperature of the coolant within a high-precision range of ±1℃ and utilizing the uniform cooling effect of the dual independent serpentine fluid channels, this invention effectively reduces the temperature gradient between different parts of the slide and significantly reduces the thermal deformation of the slide. Actual testing shows that using the slide structure of this invention reduces the positioning error of the CNC machining center to 0.005mm / m, greatly improving machining accuracy.

[0026] (3) This utility model adopts a thin-plate slide design, which is more compact and lighter than the traditional cast iron slide, which is conducive to improving the dynamic performance and response speed of the equipment. At the same time, the built-in cooling channel system avoids the cumbersome layout of external cooling pipes, making the overall structure of the equipment simpler.

[0027] (4) The coolant sealing system of this utility model adopts a combination structure of serpentine sealing strip, O-ring and sealing pressure plate. The sealing ring is tightened by torque wrench to ensure that it produces appropriate compression deformation, forming a continuous and reliable sealing area. The R-threaded joint with sealant and the integrated hose assembly further enhance the sealing performance of the system, effectively preventing coolant leakage and avoiding damage to the precision transmission components of the equipment.

[0028] (5) Due to the adoption of a dual independent serpentine fluid channel design, this utility model facilitates troubleshooting when the cooling system experiences leaks or other malfunctions, reducing maintenance difficulty. When replacing the seals, only the upper sealing pressure plate needs to be removed, making the operation simple and convenient, greatly reducing maintenance workload and downtime. Furthermore, the slide structure design of this utility model is suitable for most overhead bridge and moving column gantry CNC machining centers, and can be compatible with different types of bed components and crossbeam components, thus having a wide range of applications.

[0029] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0030] Figure 1 This is an assembly diagram of a CNC machining center with an integrated cooling slide.

[0031] Figure 2 This is a schematic diagram of the overall structure of the integrated cooling slide.

[0032] Figure 3 This is a schematic diagram of the integrated cooling slide after removing the upper sealing pressure plate;

[0033] Figure 4 It is a cross-sectional view of the integrated cooling slide, showing the shape of the cryogenic cooling fluid channel and the sealing structure;

[0034] Figure 5 This is a partial enlarged view of the slider mounting section in the cross-sectional view of the integrated cooling slide.

[0035] In the diagram: 1. Integrated cooling slide; 2. Bed assembly; 3. Crossbeam assembly; 11. Thin plate slide; 12. Sealing plate; 13. Drive motor; 14. Guide rail slider; 15. Conical positioning pin; 16. Adjustment mechanism; 17. Snake-shaped sealing strip; 18. O-ring seal; 19. Pipe fitting; 110. Snake-shaped fluid channel. Detailed Implementation

[0036] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0037] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0038] Example 1

[0039] This embodiment provides an integrated cooling slide 1, including a thin plate slide 11 and a built-in cooling medium flow channel system and a coolant sealing system;

[0040] The cooling medium flow channel system includes a serpentine fluid channel 110 formed on a thin plate slide 11. The serpentine fluid channel 110 has an inlet and an outlet. Pipe joints 19 are installed at the inlet and outlet respectively. The pipe joints 19 are used to connect the rubber hose of an external refrigeration unit to form a closed loop circulation.

[0041] The coolant sealing system includes a serpentine sealing strip 17 surrounding the periphery of the serpentine fluid channel 110, an O-ring 18 located at the threaded hole inside the serpentine fluid channel 110, and a sealing pressure plate 12 for pressing the serpentine sealing strip 17 and the O-ring 18. The sealing pressure plate 12 is fixedly connected to the thin plate slide 11 to form a sealing area.

[0042] The serpentine fluid channel 110 comprises two independent channels, each with an inlet and an outlet. This dual-channel configuration avoids problems such as uneven cooling medium flow distribution and insufficient cooling effect caused by excessive length or supply pressure in a single channel. Furthermore, the two independent channels can precisely cool different heat-generating areas on the slide, improving the targeting and efficiency of cooling. Additionally, if one channel fails, the other can still provide some cooling, enhancing the reliability of the slide cooling system. Moreover, the shorter channel length facilitates later maintenance and reduces upkeep costs.

[0043] The sealing plate 12 is tightened to the thin-plate slide 11 using a torque wrench, causing the serpentine sealing strip 17 and the O-ring seal 18 to undergo compression deformation. Using a torque wrench to tighten the sealing plate 12 allows for precise control of the tightening force, ensuring that the serpentine sealing strip 17 and the O-ring seal 18 undergo uniform and moderate compression deformation (preferably 30% ± 5%). This precise compression deformation ensures a tight fit between the seal and the sealing surface, achieving a reliable sealing effect and effectively preventing leakage of the cooling medium. Simultaneously, the uniform tightening force also prevents deformation of the sealing plate 12 and the thin-plate slide 11 due to uneven force, ensuring the structural accuracy of the slide.

[0044] The guide rail slider 14 is installed on the bottom surface of the thin plate slide 11. During the assembly of the whole machine, it is combined with the guide rail on the bed component 2 to achieve movement. The sealing pressure plate 12 is locked above the thin plate slide 11 by a torque wrench, pressing the serpentine sealing strip 17 and the O-ring 18 to achieve the sealing of the cooling chamber.

[0045] In the closed-loop cycle, the temperature variation of the coolant is controlled within ±1℃. Maintaining the coolant temperature within such a high precision ensures that the slide's temperature remains stable, preventing periodic thermal deformation caused by excessive coolant temperature fluctuations. A stable temperature environment significantly improves the slide's thermal stability, thereby guaranteeing the consistency of the dimensional and shape accuracy of the machined parts.

[0046] The cooling medium is a coolant with anti-rust and antifreeze functions. Using a coolant with anti-rust properties effectively prevents corrosion of components such as the cooling medium flow channel system, pipe joints 19, and hoses due to prolonged contact with the coolant, extending the equipment's service life. The antifreeze function allows the slide to operate normally in cold environments, preventing coolant freezing at low temperatures, which could lead to flow channel blockage, equipment damage, and other problems, thus improving the equipment's environmental adaptability.

[0047] The O-ring 18 is made of oxidation-resistant and corrosion-resistant materials. As a key component of the sealing system, the O-ring 18 is immersed in coolant and subjected to a certain temperature environment for a long time. The use of oxidation-resistant and corrosion-resistant materials (such as fluororubber) ensures that the O-ring will not age or fail due to oxidation or corrosion during long-term use, thus ensuring the stability and durability of the sealing performance.

[0048] The pipe fitting 19 is an R-threaded fitting with sealant. During connection, the sealant fills the gap between the threads, forming a reliable seal and effectively preventing coolant leakage from the threaded connection. The tapered design of the R-thread also helps to enhance the sealing performance of the fitting, ensuring stable pressure of the cooling medium in the closed-loop circulation and improving the reliability of the cooling system.

[0049] The hoses described are integrated hose assemblies. These assemblies combine multiple hoses along a pre-defined path and length, reducing connection points and the risk of leakage. Furthermore, the integrated design simplifies and speeds up hose installation, improving equipment assembly efficiency and facilitating future maintenance and replacement.

[0050] The thin-plate slide 11 is equipped with a tapered locating pin 15, which is used for positioning and connecting with the crossbeam or column of the CNC machining center. The tapered locating pin 15 has high positioning accuracy, ensuring a precise positioning connection between the thin-plate slide 11 and the crossbeam or column, guaranteeing the stability and accuracy of the slide during movement. The tapered structure also has an automatic centering function, facilitating rapid positioning and calibration during installation, improving the assembly accuracy and efficiency of the equipment.

[0051] The thin-plate slide 11 is equipped with an adjustment mechanism 16, which is used to adjust the installation position of the drive motor 13. The adjustment mechanism 16 can finely adjust the installation position of the drive motor 13 to ensure that the gears on the drive motor 13 and the rack on the bed component 2 can achieve precise meshing, ensuring the smooth operation of the transmission system, reducing the additional heat and vibration caused by unstable transmission, and further improving the operating stability and machining accuracy of the equipment.

[0052] The integrated cooling slide 1 of this utility model comprises a sealing pressure plate 12 that, after being locked onto the thin-plate slide 11 by a torque wrench, compresses the serpentine sealing strip 17 and the O-ring 18, causing sufficient compression deformation to form a continuous sealed cavity area. Low-temperature coolant enters the sealed cavity through the hose assembly along the pipe joint 19. After the cavity is filled with coolant, it returns to the cooling device through the cavity outlet, achieving coolant circulation. The sealed cavity is located directly above the guide rail slider 14 and around the drive motor 13. The low-temperature coolant circulates within the cavity, absorbing frictional heat and heat generated during drive motor startup, achieving gradient heat dissipation of the slide structure, suppressing thermal deformation of the slide, and ensuring machine tool accuracy.

[0053] This device effectively suppresses thermal deformation of the slide structure during transmission, improving heat exchange efficiency by 60% compared to traditional cooling methods. Furthermore, maintenance and upkeep are simple; replacing the sealing gasket only requires removing the upper sealing plate. Due to its dual cooling channels, it is easier to locate leaks. By suppressing thermal deformation, the positioning error is reduced to 0.005 mm / m.

[0054] Example 2

[0055] This embodiment provides a CNC machining center, including a bed component 2 and a crossbeam component 3, and also includes an integrated cooling slide 1 as described in Embodiment 1, wherein the integrated cooling slide 1 is connected between the bed component 2 and the crossbeam component 3.

[0056] This CNC machining center is an overhead gantry machining center. The bed component 2 is made of welded structure or cast iron material, and undergoes aging treatment to eliminate internal stress and ensure the stability of the bed. The crossbeam component 3 is made of welded steel structure or cast iron material, and is connected to the integrated cooling slide 1 through guide rails, enabling lateral movement on the slide, with a rapid traverse speed of up to 60m / min.

[0057] The integrated cooling slide 1 adopts the structure of Embodiment 1 and is installed between the bed component 2 and the crossbeam component 3. There are two of them, located at both ends of the crossbeam component 3, to ensure the balance and stability of the crossbeam during movement.

[0058] The CNC machining center has a spindle power of 56kW and a maximum speed of 18,000 r / min, enabling high-speed precision machining. The equipment is equipped with an automatic tool changer with a tool magazine capacity of 40 tools and a tool change time of 1.5 seconds, improving machining efficiency.

[0059] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An integrated cooling slide, comprising a thin-plate slide (11), characterized in that, It also includes a built-in cooling medium flow channel system and a coolant sealing system; The cooling medium flow channel system includes a serpentine fluid channel (110) opened on a thin plate slide (11). The serpentine fluid channel (110) has an inlet and an outlet. A pipe joint (19) is installed at the inlet and the outlet respectively. The pipe joint (19) is used to connect the rubber hose of an external refrigeration unit to form a closed loop circulation. The coolant sealing system includes a serpentine sealing strip (17) arranged around the periphery of the serpentine fluid channel (110), an O-ring (18) located at the threaded hole inside the serpentine fluid channel (110), and a sealing plate (12) for pressing the serpentine sealing strip (17) and the O-ring (18). The sealing plate (12) is fixedly connected to the thin plate slide (11) to form a sealing area.

2. The integrated cooling slide according to claim 1, characterized in that, There are two serpentine fluid channels (110), which are independent of each other, and each serpentine fluid channel (110) has an inlet and an outlet.

3. The integrated cooling slide according to claim 1, characterized in that, The sealing plate (12) is locked to the thin plate slide (11) by a torque wrench, causing the serpentine sealing strip (17) and the O-ring (18) to be compressed and deformed.

4. The integrated cooling slide according to claim 1, characterized in that, The temperature change of the coolant in the closed-loop cycle is controlled within ±1℃.

5. The integrated cooling slide according to claim 1, characterized in that, The cooling medium is a coolant with anti-rust and antifreeze functions.

6. The integrated cooling slide according to claim 1, characterized in that, The O-ring (18) is made of oxidation-resistant and corrosion-resistant materials.

7. The integrated cooling slide according to claim 1, characterized in that, The pipe fitting (19) is an R-threaded fitting with sealant.

8. The integrated cooling slide according to claim 1, characterized in that, The hose is an integrated hose assembly.

9. The integrated cooling slide according to claim 1, characterized in that, The thin-plate slide (11) is provided with a tapered positioning pin (15), which is used to position and connect with the beam component (3) or column of the CNC machining center.

10. The integrated cooling slide according to claim 1, characterized in that, The thin-plate slide (11) is provided with an adjustment mechanism (16), which is used to adjust the installation position of the drive motor (13).

11. A CNC machining center, comprising a bed component (2) and a crossbeam component (3), characterized in that, It also includes an integrated cooling slide (1) as described in any one of claims 1-10, the integrated cooling slide (1) being connected between the bed component (2) and the crossbeam component (3).

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