High-precision numerical control machine tool liquid static pressure guide rail sliding table device

Abstract

The application relates to a high-precision numerical control machine tool liquid static pressure guide rail sliding table device, and belongs to the technical field of numerical control machine tool moving parts, which comprises a workbench, a machine bed and a machining unit fixedly arranged on the machine bed, static pressure guide rails are arranged on the two sides of the machine bed, a plurality of groups of static pressure sliding blocks are arranged on the two sides of the bottom of the workbench, and the workbench is slidably arranged on the static pressure guide rails through the static pressure sliding blocks; static pressure guide rails are arranged on the two sides of the two ends of the workbench, and each static pressure guide rail comprises a scraping unit; the scraping unit comprises a scraping shell and a scraper; a power assembly is arranged in the scraping shell; one side of the scraping shell is slidably arranged on the workbench, an oil suction nozzle is arranged on the lower part of the side, away from the workbench, of the scraping shell, and an oil distribution nozzle is arranged on the lower part of the side of the scraping shell arranged on the workbench; the power assembly is in communication with the oil suction nozzle and the oil distribution nozzle; the scraper is rotationally arranged at the bottom of the scraping shell and is used for scraping impurities on the surface of the static pressure guide rail; and the application has the technical effect of simultaneously removing impurities on the surface of the static pressure guide rail and maintaining a uniform oil film.

Description

Technical Field

[0001] This application relates to the technical field of moving parts of CNC machine tools, and in particular to a high-precision CNC machine tool hydrostatic guide slide device. Background Technology

[0002] As the core equipment of high-end equipment manufacturing, high-precision CNC machine tools directly determine the workpiece machining quality through their motion accuracy and operational stability. Hydrostatic guide slides rely on oil film to achieve the suspension and sliding of the worktable, which has advantages such as low friction coefficient, smooth movement, high precision, and long service life. They are widely used in precision grinding, ultra-precision milling and other machining scenarios, and are key components to ensure that CNC machine tools can achieve high-precision and high-stability machining. In existing hydrostatic guide slide devices, during the machining process, metal chips and slag generated by grinding are easy to fall off and adhere to the surface of the hydrostatic guide. Traditional structures often use simple scrapers for passive cleaning, which can easily damage the integrity of the oil film while removing impurities.

[0003] Patent (CN 116900737 A) discloses a hydrostatic guide rail device, including a sliding guide rail, a hydrostatic slider slidably mounted on the sliding guide rail, and a hydraulic system for providing pressurized fluid to the hydrostatic slider. The hydrostatic slider has an oil-sealing surface that forms hydrostatic pressure with the sliding guide rail. An oil reservoir is formed in the middle area of ​​each oil-sealing surface. A conveying channel for supplying fluid to the oil reservoir is formed inside the hydrostatic slider. The conveying channel communicates with the end side of the hydrostatic slider to form an oil inlet. An oil inlet component is provided at the end of the hydrostatic slider. The oil inlet component has oil passages that connect to the hydraulic system and multiple oil inlets. The oil inlet component is equipped with an oil removal assembly for scraping off residual liquid on the sliding guide rail. The side of the oil removal assembly closest to the sliding guide rail abuts against the sliding guide rail. The above patent can achieve stable oil supply to the hydrostatic guide rail and scrape off residual liquid on the surface of the sliding guide rail, maintaining the basic stability of the oil film to ensure normal sliding of the guide rail. However, it is only limited to simple cleaning of residual liquid on the guide rail surface and basic oil supply. It cannot effectively remove solid impurities such as waste residue that fall onto the surface of the sliding guide rail during processing, and it cannot avoid damage to the oil film during the cleaning process, making it difficult to guarantee the sliding accuracy of the guide rail.

[0004] Regarding the aforementioned technologies, the inventors believe that there are drawbacks, such as impurities on the surface of hydrostatic guide rails easily scratching the guide rails and sliders, and the cleaning process easily damaging the stability of the oil film. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a high-precision CNC machine tool hydrostatic guide slide device.

[0006] This application provides a high-precision CNC machine tool hydrostatic guide slide device, which adopts the following technical solution: A high-precision CNC machine tool hydrostatic guide slide device includes a worktable, a bed, and a machining unit fixedly mounted on the bed. Hydrostatic guides are provided on both sides of the bed, and multiple sets of hydrostatic sliders are provided on both sides of the bottom of the worktable. The worktable is slidably mounted on the hydrostatic guides via the hydrostatic sliders. Scraping units are provided on both ends of the worktable, each scraping unit including a scraping housing and a scraper. A power assembly is housed inside the scraping housing. One side of the scraping housing is slidably mounted on the worktable. An oil suction nozzle is provided on the lower part of the scraping housing away from the worktable, and an oil spreading nozzle is provided on the lower part of the scraping housing on the side of the scraping housing mounted on the worktable. The power assembly is connected to both the oil suction nozzle and the oil spreading nozzle. The scraper is rotatably mounted on the bottom of the scraping housing and is used to scrape impurities from the surface of the hydrostatic guides.

[0007] By adopting the above technical solution, the scraping unit moves synchronously with the worktable. The scraper can scrape off processing waste, metal chips, and other impurities from the surface of the hydrostatic guide rail in real time, preventing impurities from being crushed by the hydrostatic slider at the bottom of the worktable and avoiding scratches on the mating surfaces of the hydrostatic guide rail and the hydrostatic slider. This reduces the interference of impurities on the sliding accuracy of the hydrostatic guide rail from the source and ensures the smooth sliding of the worktable. The scraping unit integrates an oil suction nozzle and an oil spreading nozzle and is connected to the power component. It can simultaneously treat the disturbed oil film while the scraper removes impurities, avoiding damage to the oil film caused by simply scraping off impurities. This ensures that the hydrostatic guide rail and the hydrostatic slider always maintain a stable oil film support, reducing sliding friction, reducing component wear, and extending the service life of the device. By removing impurities from the hydrostatic guide rail and maintaining the stability of the oil film, it effectively avoids problems such as worktable sliding deviation and jamming, ensuring high-precision sliding of the worktable on the hydrostatic guide rail. This, in turn, ensures the grinding accuracy of the workpiece by the processing unit, reduces processing errors caused by insufficient cleanliness of the hydrostatic guide rail or damage to the oil film, and improves the finished product qualification rate.

[0008] Preferably, the power assembly includes a suction mechanism and a drive mechanism. The suction mechanism is disposed in the upper part of the scraping housing; the drive mechanism is located below the suction mechanism; the drive mechanism includes a drive shaft and a drive wheel; the drive shaft passes through the scraping housing and is rotatably connected to the scraping housing; both ends of the drive shaft extend to the outside of the scraping housing, and the drive wheel is fixedly disposed at both ends of the drive shaft located outside the scraping housing; a cam is fixedly disposed in the middle of the drive shaft inside the scraping housing.

[0009] By adopting the above technical solution, the drive wheel moves synchronously with the scraping unit, and the friction between the drive wheel and the corresponding mating surface of the bed drives the drive shaft and cam to rotate, thereby moving the worktable and rotating the drive wheel to complete the power output. Drive wheels are set at both ends of the drive shaft to ensure that the drive shaft is evenly stressed, avoiding shaft tilting and rotation jamming caused by unilateral stress, and ensuring that the cam rotates at a uniform speed. This provides stable and continuous power to the suction mechanism, ensuring the uniformity of oil suction and oil spreading actions, and avoiding problems such as uneven oil film spreading and incomplete impurity suction caused by power fluctuations.

[0010] Preferably, the suction mechanism includes a piston cylinder, a piston block, a piston rod, and a drive spring; the piston cylinder is fixedly disposed within the scraping housing, the piston block is slidably disposed within the piston cylinder, one end of the piston rod is fixed to the piston block, and the other end of the piston rod abuts against the cam, and the piston rod is slidably connected to the piston cylinder; the drive spring is sleeved on the piston rod, one end of the drive spring is fixed to the piston cylinder, and the other end of the drive spring is fixed to the other end of the piston rod; an inlet and an outlet are respectively provided on both sides of the top of the piston cylinder, a first one-way valve is provided on the inlet, and the inlet is connected to the oil suction nozzle through the first one-way valve; a second one-way valve is provided on the outlet, and the outlet is connected to the oil spreading nozzle through the second one-way valve.

[0011] By adopting the above technical solution, the piston rod and piston block are driven to make stable reciprocating linear motion in the piston cylinder through the cooperation of the cam and the drive spring. Combined with the one-way conduction function of the first and second one-way valves, the circulation action of sucking up oily liquid and pumping clean oil is realized. It is synchronized with the scraping action of the scraper, which can quickly repair the oil film while removing impurities from the hydrostatic guide rail, and avoid the oil film damage affecting the sliding accuracy of the worktable. The first one-way valve only allows the oil at the suction nozzle to be sucked into the piston cylinder, and the second one-way valve only allows the oil in the piston cylinder to be pumped to the oil spreading nozzle, which effectively prevents the oil backflow and avoids the backflow of the sucked impure oil to the surface of the hydrostatic guide rail or the backflow of the pumped clean oil to the piston cylinder, ensuring the orderly circulation of oil and improving the reliability of suction and oil spreading.

[0012] Preferably, an elongated distributor is provided at the outlet of the oil-spreading nozzle. The elongated distributor has an oil passage cavity inside. One end of the elongated distributor has multiple sets of micro-holes that communicate with the oil passage cavity. The other end of the elongated distributor has a first oil inlet and a second oil inlet. The first oil inlet communicates with the interior of the oil-spreading nozzle. The length of the elongated distributor is adapted to the width of the hydrostatic guide rail. An energy storage structure is provided inside the oil-spreading nozzle. The energy storage structure communicates with the second oil inlet.

[0013] By adopting the above technical solution, the length of the elongated distributor is adapted to the width of the hydrostatic guide rail. After the oil enters the oil circuit cavity through the first oil inlet, it is evenly sprayed out through multiple sets of micro-holes, forming a continuous and uniform oil film along the width direction of the hydrostatic guide rail. This avoids uneven oil film thickness caused by uneven local oil supply, effectively preventing tilting and jamming during the sliding of the worktable and ensuring the sliding accuracy of the worktable. The energy storage structure is connected to the second oil inlet, storing pressure and oil volume when the power component is supplying oil normally. When the power component is pumping, the energy storage structure can release the stored oil in time and replenish it to the elongated distributor through the second oil inlet, ensuring a continuous oil supply and completely avoiding the breakage of the oil film on the surface of the hydrostatic guide rail caused by oil supply interruption, thus maintaining stable lubrication between the hydrostatic guide rail and the hydrostatic slider.

[0014] Preferably, the energy storage structure includes an energy storage cylinder, an energy storage spring, a pressure block, and an oil passage pipe; the pressure block is slidably disposed within the energy storage cylinder, one end of the energy storage spring is fixedly disposed within one end of the energy storage cylinder, and the other end of the energy storage spring is fixedly disposed within one end of the pressure block; the oil passage pipe passes through one end of the energy storage cylinder, one end of the oil passage pipe is disposed within the oil inlet, and the other end of the oil passage pipe is connected to the second oil inlet; the oil passage pipe has a first opening and a second opening, the first opening and the second opening are arranged axially along the oil passage pipe, and the oil passage pipe is connected to the energy storage cylinder through the first opening and the second opening.

[0015] By adopting the above technical solution, stable pressure compensation can be achieved during intermittent oil supply to the power component, ensuring continuous and uninterrupted oil film. This completely avoids the loss of hydrostatic guide rail oil film caused by momentary oil cut-off in the piston block during the suction phase, significantly improving the running accuracy and stability of the slide table. An energy storage structure combining an energy storage cylinder, energy storage spring, and pressure block is used. During the power component's pumping phase, the oil pressure automatically compresses the energy storage spring to complete energy storage. During the suction phase, the energy storage spring resets the pump and then releases pressure to supply oil. The oil pipeline has a first opening and a second opening along the axial direction to achieve energy storage oil inlet and pressure release oil outlet, respectively. This allows for rapid oil replenishment during intermittent piston pump oil supply, preventing hydrostatic guide rail oil film rupture due to intermittent oil supply. The energy storage and oil replenishment processes are completely switched according to changes in oil circuit pressure.

[0016] Preferably, a switching mechanism is provided inside the oil passage. The switching mechanism includes a stop block and a return spring. The stop block is slidably disposed inside the oil passage. One end of the return spring is fixed to the oil passage, and the other end of the return spring is fixed to the stop block. The stop block is used to open and close the first opening and the second opening during the sliding process.

[0017] By adopting the above technical solution, automatic switching between energy storage and oil replenishment is achieved. When the power unit pumps oil to the oil nozzle, the impact force of the oil pushes the stop block to overcome the elastic force of the return spring and slide, opening the first opening and closing the second opening, ensuring that the oil only enters the energy storage cylinder to complete energy storage. When the power unit switches to the suction state and the oil circuit pressure drops, the return spring drives the stop block to reset, closing the first opening and opening the second opening, so that the oil in the energy storage cylinder can be smoothly discharged for oil replenishment. The entire switching process is completed entirely by the change of oil circuit pressure, ensuring the continuity of oil circulation.

[0018] Preferably, the scraper is arranged at an angle relative to the hydrostatic guide rail; a torsion spring is provided between the scraper and the scraping housing, and the scraper is kept in contact with the surface of the hydrostatic guide rail by the torsion spring; the scraper generates different deflection postures according to the movement direction of the worktable.

[0019] By adopting the above technical solution, the scraper achieves bidirectional adaptive posture switching, automatically balancing the removal of impurities and the protection of the oil film. Scraping occurs simultaneously with the sliding of the worktable, with the scraper deflecting to its working angle and its blade tightly adhering to the hydrostatic guide rail. This effectively removes waste and debris, ensuring the cleanliness of the hydrostatic guide rail and preventing scratches on the hydrostatic slider and guide rail. During the return stroke of the worktable, the scraper automatically avoids deflection under the action of resistance and torsion springs, only lightly sliding against the surface of the hydrostatic guide rail, no longer scraping forcefully. This avoids excessive scraping of the oil film during the return stroke, ensuring the continuity and integrity of the oil film and maintaining the stability of the hydrostatic support. The torsion spring ensures that the scraper always maintains elastic contact with the surface of the hydrostatic guide rail, adapting to flatness errors and assembly deviations, maintaining reliable contact, and preventing incomplete scraping or damage to the hydrostatic guide rail due to gaps or rigid impacts. The inclined arrangement of the scraper, combined with its deflection posture, makes the force on the scraper more reasonable during forward and reverse movements.

[0020] Preferably, a sliding block is provided on the scraping housing above the oiling nozzle, and the scraping housing is slidably mounted on the worktable via the sliding block. A pressure spring is provided between the sliding block and the worktable, with one end of the pressure spring fixedly mounted on the sliding block and the other end of the pressure spring fixedly mounted on the worktable.

[0021] By adopting the above technical solution, the elastic floating structure of sliding block and pressure spring is used to ensure the contact position of scraper, oil suction nozzle and oil spreading nozzle, avoiding incomplete scraping, poor oil suction or uneven oil spreading due to excessive gap; the pressure spring continuously provides downward clamping force to the scraping unit to ensure that the drive wheel and the bed mating surface always maintain stable contact, preventing power transmission interruption due to jump or gap, ensuring stable operation of the suction mechanism as the worktable moves, and continuous oil suction and spreading actions. The elastic clamping method is a flexible contact, which buffers the vibration and impact when the worktable moves, and avoids rigid collision between the scraper, oil suction nozzle and other components and the hydrostatic guide rail, which not only protects the accuracy of the hydrostatic guide rail from damage, but also reduces component wear.

[0022] Preferably, the suction port of the oil suction nozzle is configured as a flat structure, the width of the suction port of the oil suction nozzle is adapted to the width of the hydrostatic guide rail, and a filter screen is detachably connected to the suction port of the oil suction nozzle.

[0023] By adopting the above technical solution, the oil suction nozzle adopts a flat and wide structure with a width that matches the hydrostatic guide rail. It can completely cover the scraping area on the surface of the hydrostatic guide rail and simultaneously suck up the oil raised by the scraper across the entire width. The flat suction port fits the shape of the hydrostatic guide rail, forming a stable negative pressure area during suction, reducing air intake, improving suction efficiency and oil recovery smoothness, and preventing local oil film disturbance caused by uneven oil suction. A removable filter screen is installed at the suction port to filter waste residue and metal debris before the oil enters the suction mechanism.

[0024] Preferably, the processing unit includes two sets of columns, a middle crossbeam, a movable crossbeam, a first slide, and a second slide; one set of columns is fixedly installed on one side of the bed, and the other set of columns is fixedly installed on the other side of the bed; both ends of the middle crossbeam are fixedly installed on the tops of the two sets of columns; the movable crossbeam is fixedly installed on the sides of the two sets of columns and the middle crossbeam; the first slide and the second slide are slidably installed on the movable crossbeam; a grinding spindle is installed on the first slide; and a grinding wheel dresser is installed on the second slide.

[0025] By adopting the above technical solution, a frame structure combining double-sided columns, a middle crossbeam, and a movable crossbeam is used. This structure has high overall rigidity and stability, effectively resisting the cutting force and vibration generated during grinding. The movable crossbeam is fixedly installed on the sides of the columns and the middle crossbeam, forming a stable lateral support structure. This structure provides a high-precision guiding reference for the slides and optimizes the spatial layout. The first and second slides slide under the guidance of the movable crossbeam, with a unified motion reference. This effectively ensures the relative positional accuracy of the grinding spindle and the grinding wheel dresser, reducing the cumulative error caused by different guiding references. The grinding spindle and the grinding wheel dresser are independently arranged on two slides, enabling rapid switching between grinding and grinding wheel dressing processes.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the cam and the drive spring, the piston rod and piston block are driven to make stable reciprocating linear motion in the piston cylinder. Combined with the one-way conduction of the first and second one-way valves, the circulation action of sucking up oily liquid and pumping clean oil is realized. It works in sync with the scraping action of the scraper to quickly repair the oil film while removing impurities from the hydrostatic guide rail, and avoid the oil film damage affecting the sliding accuracy of the worktable. The first one-way valve only allows oil from the suction nozzle to be sucked into the piston cylinder, and the second one-way valve only allows oil from the piston cylinder to be pumped to the spreading nozzle. This effectively prevents oil backflow and avoids the backflow of the sucked-up impure oil to the surface of the hydrostatic guide rail or the backflow of the pumped clean oil to the piston cylinder. This ensures the orderly circulation of oil and improves the reliability of suction and spreading.

[0027] 2. The length of the elongated distributor is adapted to the width of the hydrostatic guide rail. After the oil enters the oil circuit cavity through the first oil inlet, it is evenly sprayed out through multiple sets of micro-holes, forming a continuous and uniform oil film along the width direction of the hydrostatic guide rail. This avoids uneven oil film thickness caused by uneven local oil supply, effectively preventing tilting and jamming during table sliding and ensuring the sliding accuracy of the table. The energy storage structure is connected to the second oil inlet. When the power component is supplying oil normally, it stores pressure and oil volume. When the power component is pumping, the energy storage structure can release the stored oil in time and replenish it to the elongated distributor through the second oil inlet, ensuring a continuous oil supply. This completely avoids the breakage of the oil film on the surface of the hydrostatic guide rail caused by oil supply interruption and maintains stable lubrication between the hydrostatic guide rail and the hydrostatic slider. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure in the embodiment.

[0029] Figure 2 This is a schematic diagram of the structure between the worktable and the hydrostatic guide rail in the embodiment.

[0030] Figure 3 This is a schematic diagram of the scraping unit in the embodiment.

[0031] Figure 4 This is a cross-sectional schematic diagram of the scraped shell and the internal structure of the piston cylinder in the embodiment.

[0032] Figure 5 This is a schematic diagram of the filter screen at the oil suction nozzle in the embodiment.

[0033] Figure 6 A cross-sectional schematic diagram of the internal structure of the oil-spreading nozzle in the embodiment.

[0034] Figure 7 yes Figure 6 A magnified view of part A in the middle.

[0035] Explanation of reference numerals in the attached drawings: 1. Worktable; 11. Hydrostatic slide block; 2. Bed; 21. Hydrostatic guide rail; 3. Scraping unit; 31. Scraping housing; 311. Suction nozzle; 3111. Filter screen; 312. Oil spreading nozzle; 32. Scraper; 33. Torsion spring; 34. Sliding block; 4. Power assembly; 41. Suction mechanism; 411. Piston cylinder; 4111. Inlet; 4112. Outlet; 412. Piston block; 413. Piston rod; 414. Drive spring; 415. First check valve; 416. Second check valve; 42. Drive mechanism; 421. Drive shaft; 422. Drive wheel ; 423, Cam; 5, Long strip distributor; 51, Oil passage cavity; 52, Micro-hole; 53, First oil inlet; 54, Second oil inlet; 6, Energy storage structure; 61, Energy storage cylinder; 62, Energy storage spring; 63, Pressure block; 64, Oil passage pipe; 641, First opening; 642, Second opening; 643, Switching mechanism; 6431, Stop block; 6432, Return spring; 7, Machining unit; 71, Column; 72, Intermediate crossbeam; 73, Moving crossbeam; 74, First slide; 75, Second slide; 76, Grinding spindle; 77, Grinding wheel dresser; 8, Pressure spring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0037] This application discloses a high-precision CNC machine tool hydrostatic guide slide device. (Refer to...) Figure 1 , Figure 2 and Figure 3The system includes a worktable 1, a bed 2, and a processing unit 7 fixedly mounted on the bed 2. Hydrostatic guide rails 21 are provided on both sides of the bed 2. Multiple sets of hydrostatic sliders 11 are provided on both sides of the bottom of the worktable 1, allowing the worktable 1 to slide on the hydrostatic guide rails 21 via the hydrostatic sliders 11. Scraping units 3 are provided on both ends of the worktable 1. Each scraping unit 3 includes a scraping housing 31 and a scraper 32. A power assembly 4 is installed inside the scraping housing 31. One side of the scraping housing 31 is slidably mounted on the worktable 1. An oil suction nozzle 311 is provided on the lower part of the side of the scraping housing 31 away from the worktable 1, and an oil spreading nozzle 312 is provided on the lower part of the side of the scraping housing 31 facing the worktable 1. The power assembly 4 is connected to the oil suction nozzle 311 and the oil spreading nozzle 312 respectively. 12 are connected; the scraper 32 is rotatably mounted on the bottom of the scraping housing 31, and the scraper 32 is used to scrape off impurities on the surface of the hydrostatic guide rail 21; the processing unit 7 includes two sets of columns 71, a middle crossbeam 72, a moving crossbeam 73, a first slide 74 and a second slide 75; one set of columns 71 is fixedly mounted on the side of one side of the bed 2, and the other set of columns 71 is fixedly mounted on the side of the other side of the bed 2; the two ends of the middle crossbeam 72 are fixedly mounted on the top of the two sets of columns 71; the moving crossbeam 73 is fixedly mounted on the side of the two sets of columns 71 and the middle crossbeam 72; the first slide 74 and the second slide 75 are slidably mounted on the moving crossbeam 73; a grinding spindle 76 is mounted on the first slide 74; a grinding wheel dresser 77 is mounted on the second slide 75.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The machining unit 7 performs grinding on the workpiece. Grinding waste easily falls onto the surface of the hydrostatic guide rails 21 on both sides of the bed 2. The hydrostatic slider 11 at the bottom of the worktable 1 slides on the hydrostatic guide rail 21. The debris will scratch the mating surface between the hydrostatic guide rail 21 and the hydrostatic slider 11, destroying the stability of the oil film and affecting the sliding accuracy and machining accuracy of the worktable 1. During the movement of the worktable 1, the scraping units 3 at both ends move synchronously along the hydrostatic guide rail 21 with the worktable 1. The scraper 32 at the bottom of the scraping housing 31 continuously adheres to the surface of the hydrostatic guide rail 21, cleaning the waste attached to the surface of the hydrostatic guide rail 21. While the scraper 32 scrapes away the impurities, the power component 4 inside the scraping housing 31 is activated. The power component 4 drives the oil suction nozzle 311 to synchronously suck and recover the oil in the scraped area. Then, the oil is evenly spread back onto the surface of the hydrostatic guide rail 21 through the oil spreading nozzle 312 on the scraping housing 31, quickly repairing and rebuilding a continuous and stable oil film.

[0039] Reference Figure 3 and Figure 4The power assembly 4 includes a suction mechanism 41 and a drive mechanism 42. The suction mechanism 41 is located in the upper part of the scraping housing 31; the drive mechanism 42 is located below the suction mechanism 41; the drive mechanism 42 includes a drive shaft 421 and a drive wheel 422; the drive shaft 421 passes through the scraping housing 31 and is rotatably connected to the scraping housing 31; both ends of the drive shaft 421 extend to the outside of the scraping housing 31, and the drive wheel 422 is fixedly installed at both ends of the drive shaft 421 located outside the scraping housing 31; a cam 423 is fixedly installed in the middle of the drive shaft 421 inside the scraping housing 31; the suction mechanism 41 includes a piston cylinder 411, a piston block 412, a piston rod 413, and a drive spring 414; the piston cylinder 411 is fixedly installed inside the scraping housing 31. The piston block 412 is slidably disposed inside the piston cylinder 411. One end of the piston rod 413 is fixed to the piston block 412, and the other end of the piston rod 413 abuts against the cam 423. The piston rod 413 is slidably connected to the piston cylinder 411. The drive spring 414 is sleeved on the piston rod 413. One end of the drive spring 414 is fixed to the piston cylinder 411, and the other end of the drive spring 414 is fixed to the other end of the piston rod 413. The piston cylinder 411 has an inlet 4111 and an outlet 4112 on its two sides. The inlet 4111 is provided with a first check valve 415, which connects the inlet 4111 to the oil suction nozzle 311. The outlet 4112 is provided with a second check valve 416, which connects the outlet 4112 to the oil spreading nozzle 312.

[0040] Reference Figure 3 and Figure 4 When the scraping unit 3 moves along the hydrostatic guide rail 21 with the worktable 1, the drive wheels 422 at both ends of the drive shaft 421 installed outside the scraping housing 31 come into contact with the corresponding mating surfaces on the bed 2 on both sides of the hydrostatic guide rail 21, generating friction, which in turn drives the drive wheels 422 to rotate, and the drive shaft 421 rotates synchronously with the drive wheels 422; the cam 423 in the middle of the drive shaft 421 rotates continuously with the drive shaft 421, and under the action of the cam 423 profile and the drive spring 414, the piston rod 413 drives the piston block 412 to make reciprocating linear motion in the piston cylinder 411; when the cam 423 rotates to the return section, the drive... When the moving spring 414 returns to its original position, the piston rod 413 slides outward from the piston cylinder 411. At this time, the first check valve 415 opens and the second check valve 416 closes. The oil collected by the scraper 32 when cleaning the hydrostatic guide rail 21 is sucked into the piston cylinder 411 through the oil suction nozzle 311 and the inlet 4111. When the cam 423 rotates to the push stroke section, the piston rod 413 overcomes the elastic force of the drive spring 414 and slides into the piston cylinder 411. At this time, the first check valve 415 closes and the second check valve 416 opens. The oil in the piston cylinder 411 is pumped to the oil sprinkling nozzle 312 through the outlet 4112.

[0041] Reference Figure 3 , Figure 5 and Figure 6 An elongated distributor 5 is provided at the outlet 4112 of the oil spreading nozzle 312. An oil passage cavity 51 is provided inside the elongated distributor 5. Multiple sets of micro-holes 52 are opened at one end of the elongated distributor 5, communicating with the oil passage cavity 51. A first oil inlet 53 and a second oil inlet 54 are opened at the other end of the elongated distributor 5. The first oil inlet 53 communicates with the interior of the oil spreading nozzle 312. The length of the elongated distributor 5 is adapted to the width of the hydrostatic guide rail 21. An energy storage structure 6 is provided inside the oil spreading nozzle 312. The energy storage structure 6 communicates with the second oil inlet 54. The suction port of the oil suction nozzle 311 is designed with a flat structure. The width of the suction port of the oil suction nozzle 311 is adapted to the width of the hydrostatic guide rail 21. A filter screen 311 is detachably connected to the suction port of the oil suction nozzle 311. 1. The oil pumped by the power assembly 4 is output from the oil nozzle 312 and enters the elongated distributor 5, which is adapted to the width of the hydrostatic guide rail 21. The oil flows into the oil passage cavity 51 and is then evenly sprayed out through multiple sets of micro-holes 52 at one end of the elongated distributor 5, so that the oil forms a continuous and uniform oil film on the surface of the hydrostatic guide rail 21. The energy storage structure 6 set in the oil nozzle 312 is connected to the second oil inlet 54 of the elongated distributor 5. When the power assembly 4 supplies oil, the energy storage structure 6 stores a certain pressure and oil volume. When the power assembly 4 sucks up oil, there will be a situation where the oil is temporarily not pumped out. At this time, the energy storage structure 6 will pump out the stored oil in time to replenish the oil, so as to avoid the interruption of oil supply and the breakage of the oil film on the surface of the hydrostatic guide rail 21, and maintain the continuity and stability of oil delivery.

[0042] Reference Figure 6 and Figure 7The energy storage structure 6 includes an energy storage cylinder 61, an energy storage spring 62, a pressure block 63, and an oil passage 64. The pressure block 63 is slidably disposed within the energy storage cylinder 61. One end of the energy storage spring 62 is fixedly disposed within the energy storage cylinder 61, and the other end of the energy storage spring 62 is fixedly disposed within the pressure block 63. The oil passage 64 passes through one end of the energy storage cylinder 61, with one end of the oil passage 64 disposed within the oil inlet 312, and the other end of the oil passage 64 connected to the second oil inlet 54. The oil passage 64 has a first opening 641 and a second opening 642. The opening 642 is arranged axially along the oil passage 64, which is connected to the energy storage cylinder 61 through the first opening 641 and the second opening 642. A switching mechanism 643 is installed inside the oil passage 64. The switching mechanism 643 includes a stop block 6431 and a return spring 6432. The stop block 6431 is slidably disposed inside the oil passage 64, and one end of the return spring 6432 is fixed to the oil passage 64, while the other end is fixed to the stop block 6431. The stop block 6431 is used to open and close the first opening 641 and the second opening 642 during sliding. The energy storage structure 642 inside the oil nozzle 312... Used to stabilize oil supply during intermittent oil supply to the power assembly 4, preventing the oil film on the surface of the hydrostatic guide rail 21 from breaking; when the power assembly 4 pumps oil to the oil nozzle 312, the pressurized oil simultaneously enters the oil passage 64 and the second oil inlet 54 of the elongated distributor 5; the oil entering the oil passage 64 forms an impact thrust, pushing the internal stop block 6431 to overcome the elastic force of the return spring 6432 and slide, causing the stop block 6431 to move to the position of opening the first opening 641 and closing the second opening 642; at this time, the oil can only enter the energy storage cylinder 61 through the first opening 641, pushing the pressure block 63 to compress the energy storage spring 62, completing the pressure... Energy storage of force and oil volume; when the power component 4 switches to pumping oil, there is no pressure oil pumping into the oil nozzle 312 side temporarily, the oil pressure in the oil passage 64 drops, the reset spring 6432 drives the stop block 6431 to reset, re-close the first opening 641 and open the second opening 642; the energy storage spring 62 then releases its elastic force, pushing the pressure block 63 to squeeze the oil in the energy storage cylinder 61, so that the oil flows from the second opening 642 into the oil passage 64 and is transported to the elongated distributor 5 through the first oil inlet 53, realizing instantaneous oil replenishment, ensuring continuous and stable oil delivery, and maintaining an intact oil film on the surface of the hydrostatic guide rail 21.

[0043] Reference Figure 2 , Figure 3 and Figure 4A sliding block 34 is provided on the scraping housing 31 above the oil-spreading nozzle 312. The scraping housing 31 is slidably mounted on the worktable 1 via the sliding block 34. A pressure spring 8 is provided between the sliding block 34 and the worktable 1. One end of the pressure spring 8 is fixedly mounted on the sliding block 34, and the other end of the pressure spring 8 is fixedly mounted on the worktable 1. The scraper 32 is arranged at an angle relative to the hydrostatic guide rail 21. A torsion spring 33 is provided between the scraper 32 and the scraping housing 31. The scraper 32 is kept in contact with the surface of the hydrostatic guide rail 21 by the torsion spring 33. The scraper 32 deflects in different directions depending on the movement direction of the worktable 1. The pressure spring 8 causes the scraper 32 unit to abut against the hydrostatic guide rail 21, ensuring that the drive wheel 422 on the scraper 32 unit makes reliable contact with the hydrostatic guide rail 21 to drive the suction mechanism 41. The torsion spring 33 between the scraper 31 and the scraper 32 keeps the scraper 32 in contact with the surface of the hydrostatic guide rail 21. When the worktable 1 moves along the hydrostatic guide rail 21, the oil film resistance on the hydrostatic guide rail 21 causes the scraper 32 to deflect to the working angle, and the cutting edge of the scraper 32 is close to the surface of the hydrostatic guide rail 21, thus removing impurities from the surface of the hydrostatic guide rail 21. When the worktable 1 moves back in the opposite direction, the resistance of the hydrostatic guide rail 21 to the scraper 32 is in the opposite direction, and because the scraper 32 is inclined relative to the hydrostatic guide rail 21, the scraper 32 is deflected by the force of the torsion spring 33. The scraper 32 only maintains a light contact with the surface of the hydrostatic guide rail 21, and the cutting edge of the scraper 32 no longer scrapes the hydrostatic guide rail 21, but only slides along, thus avoiding excessive damage to the oil film caused by scraping during the return stroke.

[0044] The working principle of the high-precision CNC machine tool hydrostatic guide slide device in this application is as follows: The machining unit 7 grinds the workpiece through the grinding spindle 76. The waste generated during machining falls onto the surface of the hydrostatic guide rails 21 on both sides of the machine bed 2. When the worktable 1 moves, it is easy to scratch the mating surface between the hydrostatic guide rail 21 and the hydrostatic slider 11, which will disrupt the continuity of the oil film. The worktable 1 slides on the hydrostatic guide rail 21 through the hydrostatic slider 11, and the scraping units 3 at both ends move synchronously with the worktable 1. The pressure spring 8 between the sliding block 34 and the worktable 1 always provides downward clamping force to the scraping housing 31 to ensure reliable contact between the drive wheel 422 and the corresponding mating surface of the machine bed 2. The torsion spring 33 between the scraping housing 31 and the scraper 32 keeps the scraper 32 in contact with the hydrostatic guide rail 2. The initial posture of the guide rail 21 surface contact; when the worktable 1 moves, the surface resistance of the hydrostatic guide rail 21 acts on the inclined scraper 32, causing the scraper 32 to deflect against the force of the torsion spring 33 and into a working posture. The scraper 32 adheres to the surface of the hydrostatic guide rail 21, effectively scraping away waste residue and impurities; when the worktable 1 returns in the reverse direction, the direction of resistance changes, and the scraper 32 deflects under the action of the torsion spring 33, the cutting edge leaves the scraping state, and only lightly touches the surface of the hydrostatic guide rail 21 to slide along, avoiding excessive scraping and damage to the oil film during the return stroke; during the movement of the scraping unit 3, the drive wheel 422 rotates with friction against the mating surface of the bed 2, driving the drive shaft 421 and cam 423 to rotate, driving the piston rod 413 and piston block 412 to reciprocate within the piston cylinder 411: cam 4 When the cam 423 rotates to the return stroke, the piston block 412 and piston rod 413 slide outwards from the piston cylinder 411, creating negative pressure. The first one-way valve 415 opens and the second one-way valve 416 closes. The oil scraped off the surface of the hydrostatic guide rail 21 is filtered through the flat wide suction nozzle 311 and the filter screen 3111 and then sucked into the piston cylinder 411. When the cam 423 rotates to the push stroke, the piston block 412 moves inwards from the piston cylinder 411, creating positive pressure. The first one-way valve 415 closes and the second one-way valve 416 opens, and the oil is pressed to the oil spreading nozzle 312. After entering the oil spreading nozzle 312, a portion of the oil flows directly into the oil passage cavity 51 through the first oil inlet 53 of the elongated distributor 5, and is evenly sprayed out along the width direction of the hydrostatic guide rail 21 through multiple sets of micro-holes 52, rebuilding the stable A fixed oil film is formed; another portion of the oil impacts the baffle 6431 in the oil passage 64. The baffle 6431 overcomes the slippage of the return spring 6432, opens the first opening 641 and closes the second opening 642. The oil enters the energy storage cylinder 61 and pushes the pressure block 63 to compress the energy storage spring 62, completing the storage of pressure and oil volume. When the cam 423 in the power assembly 4 returns and draws the oil, the oil nozzle 312 temporarily has no oil supply. The return spring 6432 drives the baffle 6431 to slide back to its original position, closing the first opening 641 and opening the second opening 642. The energy storage spring 62 releases its elasticity, forcing the oil in the energy storage cylinder 61 out from the second opening 642 and replenishing it into the elongated distributor 5 through the second oil inlet 54, achieving uninterrupted oil supply and avoiding interruption of the oil film.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision CNC machine tool hydrostatic guide slide device, characterized in that: The system includes a worktable (1), a bed (2), and a processing unit (7) fixedly mounted on the bed (2). The bed (2) has hydrostatic guide rails (21) on both sides. The worktable (1) has multiple sets of hydrostatic sliders (11) on both sides of its bottom. The worktable (1) is slidably mounted on the hydrostatic guide rails (21) via the hydrostatic sliders (11). Scraping units (3) are provided on both ends of the worktable (1). Each scraping unit (3) includes a scraping housing (31) and a scraper (32). A power assembly is installed inside the scraping housing (31). (4); One side of the scraping housing (31) is slidably disposed on the workbench (1), and an oil suction nozzle (311) is disposed on the lower part of the side of the scraping housing (31) away from the workbench (1), and an oil spreading nozzle (312) is disposed on the lower part of the side of the scraping housing (31) disposed on the workbench (1); The power assembly (4) is connected to the oil suction nozzle (311) and the oil spreading nozzle (312) respectively; The scraper (32) is rotatably disposed at the bottom of the scraping housing (31), and the scraper (32) is used to scrape off impurities on the surface of the hydrostatic guide rail (21).

2. The high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: The power assembly (4) includes a suction mechanism (41) and a drive mechanism (42). The suction mechanism (41) is located in the upper part of the scraping housing (31). The drive mechanism (42) is located below the suction mechanism (41). The drive mechanism (42) includes a drive shaft (421) and a drive wheel (422). The drive shaft (421) passes through the scraping housing (31) and is rotatably connected to the scraping housing (31). The two ends of the drive shaft (421) extend to the outside of the scraping housing (31). The drive wheel (422) is fixedly installed at both ends of the drive shaft (421) located outside the scraping housing (31). A cam (423) is fixedly installed in the middle of the drive shaft (421) inside the scraping housing (31).

3. The high-precision CNC machine tool hydrostatic guide slide device according to claim 2, characterized in that: The suction mechanism (41) includes a piston cylinder (411), a piston block (412), a piston rod (413), and a drive spring (414). The piston cylinder (411) is fixedly disposed within the scraping housing (31). The piston block (412) is slidably disposed within the piston cylinder (411). One end of the piston rod (413) is fixed to the piston block (412), and the other end of the piston rod (413) abuts against the cam (423). The piston rod (413) is slidably connected to the piston cylinder (411). The drive spring (414) is sleeved on the piston rod (413). (414) One end is fixed to the piston cylinder (411), and the other end of the drive spring (414) is fixed to the other end of the piston rod (413); the piston cylinder (411) has an inlet (4111) and an outlet (4112) on both sides of the top, the inlet (4111) is provided with a first one-way valve (415), and the inlet (4111) is connected to the oil suction nozzle (311) through the first one-way valve (415); the outlet (4112) is provided with a second one-way valve (416), and the outlet (4112) is connected to the oil spreading nozzle (312) through the second one-way valve (416).

4. The high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: A long strip distributor (5) is provided at the outlet (4112) of the oil spreading nozzle (312). An oil passage cavity (51) is provided inside the long strip distributor (5). Multiple sets of micro holes (52) are opened at one end of the long strip distributor (5), and the multiple sets of micro holes (52) are connected to the oil passage cavity (51). A first oil inlet (53) and a second oil inlet (54) are opened at the other end of the long strip distributor (5). The first oil inlet (53) is connected to the inside of the oil spreading nozzle (312). The length of the long strip distributor (5) is adapted to the width of the hydrostatic guide rail (21). An energy storage structure (6) is provided inside the oil spreading nozzle (312). The energy storage structure (6) is connected to the second oil inlet (54).

5. A high-precision CNC machine tool hydrostatic guide slide device according to claim 4, characterized in that: The energy storage structure (6) includes an energy storage cylinder (61), an energy storage spring (62), a pressure block (63), and an oil passage (64); the pressure block (63) is slidably disposed within the energy storage cylinder (61), one end of the energy storage spring (62) is fixedly disposed within the energy storage cylinder (61), and the other end of the energy storage spring (62) is fixedly disposed within the pressure block (63); the oil passage (64) passes through one end of the energy storage cylinder (61), and the oil passage (64) One end of the oil pipe (64) is located inside the oil nozzle (312), and the other end of the oil pipe (64) is connected to the second oil inlet (54); the oil pipe (64) is provided with a first opening (641) and a second opening (642), the first opening (641) and the second opening (642) are arranged along the axial direction of the oil pipe (64), and the oil pipe (64) is connected to the energy storage cylinder (61) through the first opening (641) and the second opening (642).

6. A high-precision CNC machine tool hydrostatic guide slide device according to claim 5, characterized in that: A switching mechanism (643) is provided inside the oil passage (64). The switching mechanism (643) includes a stop (6431) and a return spring (6432). The stop (6431) is slidably disposed inside the oil passage (64). One end of the return spring (6432) is fixed to the oil passage (64), and the other end of the return spring (6432) is fixed to the stop (6431). The stop (6431) is used to open and close the first opening (641) and the second opening (642) during the sliding process.

7. A high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: The scraper (32) is arranged at an angle relative to the hydrostatic guide rail (21); a torsion spring (33) is provided between the scraper (32) and the scraping housing (31), and the scraper (32) is kept in contact with the surface of the hydrostatic guide rail (21) by the torsion spring (33); the scraper (32) generates different deflection postures according to the movement direction of the worktable (1).

8. A high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: A sliding block (34) is provided on the scraping housing (31) above the oil spreading nozzle (312). The scraping housing (31) is slidably mounted on the worktable (1) via the sliding block (34). A pressure spring (8) is provided between the sliding block (34) and the worktable (1). One end of the pressure spring (8) is fixedly mounted on the sliding block (34), and the other end of the pressure spring (8) is fixedly mounted on the worktable (1).

9. A high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: The suction port of the oil suction nozzle (311) is configured as a flat structure, and the width of the suction port of the oil suction nozzle (311) is adapted to the width of the hydrostatic guide rail (21). A filter screen (3111) is detachably connected to the suction port of the oil suction nozzle (311).

10. A high-precision CNC machine tool hydrostatic guide slide device according to claim 1, characterized in that: The processing unit (7) includes two sets of columns (71), a middle crossbeam (72), a moving crossbeam (73), a first slide (74), and a second slide (75); one set of columns (71) is fixedly installed on the side of one side of the bed (2), and the other set of columns (71) is fixedly installed on the side of the other side of the bed (2); both ends of the middle crossbeam (72) are fixedly installed on the top of the two sets of columns (71); the moving crossbeam (73) is fixedly installed on the side of the two sets of columns (71) and the middle crossbeam (72); the first slide (74) and the second slide (75) are slidably installed on the moving crossbeam (73); a grinding spindle (76) is provided on the first slide (74); and a grinding wheel dresser (77) is provided on the second slide (75).

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