Grinding fluid filtering system of grinding machine and high-precision numerical control thread grinding machine used for grinding fluid filtering system

Abstract

The invention provides a grinding fluid filtering system of a grinding machine and a high-precision numerical control thread grinding machine used for the grinding fluid filtering system. The grinding fluid filtering system comprises a filtering assembly, the filtering assembly comprises a coarse filtering mechanism, and the coarse filtering mechanism comprises a moving assembly arranged in a shell and used for filtering cooling liquid filter residues and a collecting assembly arranged on the moving assembly and used for collecting the filter residues; the cleaning assembly is arranged on the moving assembly and is used for cleaning the filter screen; the coarse filtering mechanism adopts an annular metal filter screen, so that the filtering area is increased, a push strip collects filter residues, and a cleaning assembly prevents blockage; the centrifugal filtering mechanism feeds cooling liquid into a centrifugal tank at a high speed through a pressurizing assembly, and impurities are precipitated and separated due to density difference; the membrane filtering mechanism performs fine filtration through a filtering membrane, the pressure washing assembly drives cooling liquid to reversely wash the filtering membrane through the upper and lower pressure difference, attached impurities are removed, and the cooling liquid cleaning efficiency and the machining precision are remarkably improved in cooperation with the anti-blocking sweeping and washing functions.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, in particular to a grinding fluid filtering system for a grinding machine and a high-precision CNC thread grinding machine used therefor. Background Art

[0002] High-precision CNC thread grinders are CNC machine tools used for precision machining of threaded parts. They can achieve high-precision thread forming through CNC system control and are suitable for machining parts such as taps, thread cutters, and precision screws. In the field of high-precision thread machining, tap grinding accuracy is crucial to thread quality. During the grinding process, the purity of the coolant directly affects the machining effect.

[0003] Chinese patent CN111168487A discloses a CNC thread grinder, which relates to the field of tap production. The machine comprises a bed, the upper end surface of which is horizontally slidably connected to a sliding plate, the sliding plate being provided with a clamping assembly, and an XY-axis movable platform disposed on the upper end surface of the bed. The XY-axis movable platform is located behind the sliding plate, with the X-direction of the XY-axis movable platform arranged parallel to the movement direction of the sliding plate. A mounting table is disposed on the upper end surface of the XY-axis movable platform, and a processing assembly is disposed on the mounting table. The processing assembly includes a grinding wheel rotatably connected to the mounting table and a processing motor. The mounting table is hinged to the XY-axis movable platform, with the hinge axis of the mounting table arranged parallel to the Y-direction, and the rotation axis of the grinding wheel arranged perpendicular to the hinge axis of the mounting table. A drive assembly is also hinged between the upper end of the XY-axis movable platform and the mounting table. The mounting table and drive assembly enable the CNC thread grinder to process taps with different helix angles, thus expanding the processing range.

[0004] However, in actual use, it was found that there were still deficiencies in the management of coolant purity. Coolant that was not effectively filtered was easily mixed with metal debris, abrasive particles and oil stains, resulting in reduced heat dissipation efficiency. Local high temperature in the grinding area caused problems such as burns on the tap surface and oxidation spots. Particle impurities entered the grinding area with the liquid flow, scratching the tap surface and increasing the roughness of the thread tooth profile. The decrease in lubricity may also cause vibration, resulting in excessive geometric accuracy of the tap and affecting the processing accuracy. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the existing technology and provide a grinding fluid filtration system for a grinding machine. By coarse filtration mechanism combined with centrifugal filtration mechanism and membrane filtration mechanism, multi-stage filtration, anti-clogging and efficient cleaning functions of the coolant are achieved, thereby solving the problems of incomplete coolant filtration leading to reduced processing accuracy and damage to the tap surface.

[0006] To achieve the above object, the present invention provides the following technical solutions: A grinding fluid filtration system for a grinding machine and a high-precision CNC thread grinder for the same, comprising a filter assembly, the filter assembly comprising: a coarse filtration mechanism, the coarse filtration mechanism comprising: A moving assembly provided inside the housing for filtering coolant residue, a collecting assembly provided on the moving assembly for collecting the residue, and a cleaning assembly provided on the moving assembly for cleaning the filter screen; The coolant enters the filter screen in the moving component, and the moving component drives the filter residue in the coolant to move. The filter residue falls into the collecting component for collection. The cleaning component will clean the filter screen to prevent it from being blocked.

[0007] Preferably, the moving component includes: a drive motor, wherein the drive motor is mounted on the housing; A driving roller, the driving roller being drivingly connected to an output shaft of the driving motor; A metal filter screen, wherein the metal filter screen is annular; rubber pads, which are arranged on both sides of the metal filter and are used to seal the gap between the metal filter and the housing to prevent coolant leakage; The waste liquid inlet pipe is used for cooling liquid to enter the waste liquid inlet pipe and fall onto the metal filter screen.

[0008] Preferably, the collecting assembly comprises: A rotating rod, wherein the rotating rod rotating device is on the housing; A driven roller connected to the rotating rod and used to support and rotate with the metal filter; Push bars, a plurality of which are arranged along the circumference and connect the two driven rollers; A fixing sleeve, which is arranged on the housing and has a limiting groove; A pull-out collection box is slidably arranged inside the fixed sleeve via a guide rail, and the pull-out collection box is also provided with a limit block; A centering strip is provided above the metal filter screen and is used to gather coolant filter residue toward the center.

[0009] Preferably, the cleaning assembly comprises: a cleaning motor, the cleaning motor being mounted on the housing; A turntable, the turntable being drivingly connected to an output shaft of the cleaning motor; a connecting plate, the connecting plate being rotatably connected to the turntable; a reciprocating plate, the reciprocating plate being slidably disposed in a slide groove inside the housing and being rotatably connected to the connecting plate; Brush bristles are arranged on the reciprocating plate to clean the filter screen to prevent clogging.

[0010] Preferably, it further comprises: a centrifugal filtration mechanism, wherein the centrifugal filtration mechanism comprises: a pressurizing assembly disposed inside the housing and configured to allow the coolant to flow at high speed in preparation for centrifugal filtration; The centrifugal filter assembly is a centrifugal filter assembly in which high-speed liquid is subjected to centrifugal motion, so that impurities are precipitated and clean coolant flows out from the top.

[0011] Preferably, the boost component includes: A liquid collecting pan, the liquid collecting pan being arranged inside the housing and used for storing the preliminarily filtered coolant; A liquid level sensor, used to detect the height of the coolant stored in the liquid collecting pan; a downpipe, the downpipe being in communication with the liquid collecting pan; A pressure pump is installed on the liquid collecting tray and a liquid inlet of the pressure pump is connected to the sewer pipe.

[0012] Preferably, the centrifugal filter assembly comprises: a centrifugal tank, wherein the liquid inlet of the centrifugal tank is connected to the liquid outlet of the pressure pump; A sedimentation tank, the sedimentation tank is connected to the bottom of the centrifugal tank and is used to store filter residue in the coolant; A connecting pipe is connected to the liquid outlet of the centrifugal tank, and the liquid outlet is used to flow out clean coolant.

[0013] Preferably, it further comprises: a membrane filtration mechanism, wherein the membrane filtration mechanism comprises: A membrane filtration component is disposed inside the housing and is used to finely filter the coolant; The pressure washing component drives the coolant to pass through the filter membrane in the reverse direction through the upper and lower pressure differences, so that the filter residue adhering to the surface of the filter membrane falls off.

[0014] Preferably, the membrane filtration assembly comprises: lower cylinder; An upper cylinder body, wherein a filter membrane is provided between the upper cylinder body and the lower cylinder body; a liquid inlet pipe, the liquid inlet pipe being connected to the lower cylinder; a first solenoid valve, which is arranged on the liquid inlet pipe and prevents the coolant in the lower cylinder from flowing out of the liquid inlet pipe when cleaning the surface of the filter membrane; a liquid outlet pipe, the liquid outlet pipe being in communication with the upper cylinder body; a waste pipe, the waste pipe being in communication with the lower cylinder; The second solenoid valve is arranged on the exhaust pipe and is used to control whether to discharge the coolant residue accumulated in the lower cylinder body.

[0015] Preferably, the pressure washing assembly comprises: a cylinder, the cylinder being mounted inside the housing; a lower piston connected to a push rod of the cylinder; a connecting shaft connected to the lower piston and passing through the lower cylinder body and the upper cylinder body; An upper piston is connected to the connecting shaft and is slidably disposed in the upper cylinder body.

[0016] The present invention also provides a high-precision CNC thread grinder, comprising a machine tool body, a clamping device arranged on one side of the machine tool body, a driving device arranged on one side of the clamping device, a grinding device arranged on the driving device, and a gripping device arranged close to the clamping device; and also comprises a grinding fluid filtration system for a grinder as described above, wherein the filter component is arranged on one side of the machine tool body, and the cutting fluid and impurities after grinding are filtered by the filter component and recycled.

[0017] The beneficial effects of the present invention are: (1) The present invention provides a plurality of filtering mechanisms to perform multi-stage filtration on the coolant. The coolant is coarsely filtered through a metal filter to filter out large particles of impurities in the coolant. Most of the remaining impurities are precipitated through centrifugal filtration. Finally, pure coolant is filtered through a membrane filter.

[0018] (2) The present invention increases the filtering area of ​​the coolant by setting a coarse filtering mechanism and adopting an annular metal filter. It also facilitates the collection of filter residue on the metal filter and prevents the metal filter from being blocked by reversely combing the metal filter through the cleaning component, thereby ensuring the filtering effect.

[0019] (3) The present invention sets up a centrifugal filter mechanism. After the coolant is fully accumulated, the coolant is sprayed at high speed by using a booster component, forming a circulation in the centrifugal filter component. The impurities have a higher density and are therefore deposited at the bottom, while the coolant has a lower density and flows out from the upper outlet, thereby separating the impurities from the coolant.

[0020] (4) The present invention provides a membrane filtration mechanism and combines it with a centrifugal filtration mechanism to filter the coolant intermittently. Pure coolant passes through the filter membrane, while impurities are blocked by the filter membrane and cannot pass through. The pressure washing component is used to create a pressure difference between the upper and lower parts. The upper part is pressurized and the lower part is vacuumed. The filtered coolant is allowed to pass through the filter membrane in the reverse direction to wash away impurities attached to the lower surface of the filter membrane, thereby preventing the filter membrane from being blocked and affecting the filtering effect.

[0021] In summary, the present invention has the advantages of high filtration accuracy, strong anti-clogging ability, convenient cleaning and maintenance, and high cooling liquid recycling rate. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the filter assembly of the present invention; Figure 3 This is a cross-sectional view of the housing of the present invention; Figure 4 This is a schematic diagram of the structure of the mobile component of the present invention; Figure 5 This is a schematic diagram of the rotating rod structure of the present invention; Figure 6 Schematic diagram of the structure of the driven roller of the present invention; Figure 7 This is a schematic diagram of the structure of the pull-out collection box of the present invention; Figure 8 This is a schematic structural diagram of the cleaning component of the present invention; Figure 9 This is a schematic structural diagram of the liquid collecting tray of the present invention; Figure 10 This is a schematic structural diagram of the centrifugal filtration mechanism of the present invention; Figure 11 This is a schematic diagram of the membrane filtration mechanism structure of the present invention; Figure 12 This is a schematic diagram of the explosion of the membrane filtration mechanism of the present invention; Figure 13 This is a schematic diagram of the lower cylinder structure of the present invention; Figure 14 It is a schematic diagram of the upper cylinder structure of the present invention.

[0022] In the picture: 100, housing; 200, machine tool body; 300, clamping device; 400, driving device; 500, grinding device; 600, gripping device; 700, filter assembly; 1. Coarse filtration mechanism; 11. Moving assembly; 111. Driving motor; 112. Driving roller; 113. Metal filter screen; 114. Rubber pad; 115. Waste liquid inlet pipe; 12. Collection assembly; 121. Rotating rod; 122. Driven roller; 123. Push bar; 124. Fixed sleeve; 1241. Limiting groove; 125. Pull-out collection box; 1251. Limiting block; 126. Centering bar; 13. Cleaning assembly; 131. Cleaning motor; 132. Turntable; 133. Connecting plate; 134. Reciprocating plate; 1341. Brush; 2. Centrifugal filter mechanism; 21. Pressurizing assembly; 211. Liquid collection tray; 212. Liquid level sensor; 213. Drain pipe; 214. Pressure pump; 22. Centrifugal filter assembly; 221. Centrifugal tank; 222. Sedimentation tank; 223. Connecting pipe; 3. Membrane filtration mechanism; 31. Membrane filtration assembly; 311. Lower cylinder; 312. Upper cylinder; 313. Filter membrane; 314. Liquid inlet pipe; 315. First solenoid valve; 316. Liquid outlet pipe; 317. Drain pipe; 318. Second solenoid valve; 32. Pressure washing assembly; 321. Cylinder; 322. Lower piston; 323. Connecting shaft; 324. Upper piston. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] Example 1 like Figures 1 to 3As shown, this embodiment provides a grinding fluid filtration system for a grinding machine, comprising: a machine tool body 200, a clamping device 300 provided on one side of the machine tool body 200 for clamping a workpiece and driving the workpiece for rotational processing, a driving device 400 provided on one side of the clamping device 300, a grinding device 500 provided on the driving device 400, a gripping device 600 provided close to the clamping device 300, and a filter assembly 700 provided on one side of the machine tool body 200 and in communication with the machine tool body 200, wherein the clamping device 300 The workpiece is grabbed from the material tray and loaded onto the clamping device 300 for clamping. The clamping device 300 clamps the workpiece and rotates. The driving device 400 drives the grinding device 500 to move back and forth to grind the workpiece on the clamping device 300. After the processing is completed, one end of the clamping device 300 clamps the workpiece to be processed and the other end clamps the processed workpiece, thereby realizing rapid loading and unloading. During the processing, the iron chips collected by the machine tool body 200 enter the filter assembly 700 together with the coolant for multi-stage filtration. The filtered cutting fluid is recycled to ensure the accuracy of the grinding process.

[0026] Furthermore, the filter assembly 700 includes a coarse filter mechanism 1, which includes: A moving assembly 11 disposed inside the housing 100 for filtering coolant residue, a collecting assembly 12 disposed on the moving assembly 11 for collecting the residue, and a cleaning assembly 13 disposed on the moving assembly 11 for cleaning the filter screen; The coolant enters the filter screen in the moving component 11, and the moving component 11 drives the filter residue in the coolant to move, and the filter residue falls into the collecting component 12 for collection. The cleaning component 13 cleans the filter screen to prevent the filter screen from being blocked.

[0027] It should be noted that the housing 100 is provided on one side of the machine tool body 200 , and an inspection door is also provided on the housing 100 for cleaning and maintenance of the internal mechanism.

[0028] Further, if Figures 3 and 4 As shown, the moving component 11 includes: A driving motor 111 , wherein the driving motor 111 is mounted on the housing 100 ; A driving roller 112, wherein the driving roller 112 is drivingly connected to the output shaft of the driving motor 111; A metal filter 113, wherein the metal filter 113 is annular; Rubber pads 114 are provided on both sides of the metal filter 113 to seal the gap between the metal filter 113 and the housing 100 to prevent coolant leakage; The cooling liquid enters the waste liquid inlet pipe 115 and falls onto the metal filter 113 .

[0029] In this embodiment, by providing the moving component 11, the coarse filtration of the coolant and the filter residue collection functions are realized, thereby ensuring the efficient operation of the subsequent filtration process.

[0030] In detail, the drive motor 111 is installed on the shell 100, and its output shaft is connected to the drive roller 112. When the drive motor 111 is started, the output shaft drives the drive roller 112 to rotate. The drive roller 112 serves as the power input end, supports and drives the annular metal filter 113 to continuously circulate, so that when the coolant falls from the waste liquid inlet pipe 115 onto the filter 113, large particles of filter residue are intercepted by the filter 113, and at the same time, the movement of the filter 113 drives the filter residue to be transported to the collection area; rubber pads 114 are arranged on both sides of the metal filter 113, tightly fitting the inner wall of the shell 100, forming a flexible sealing structure, preventing unfiltered coolant from directly leaking out of the gap between the filter 113 and the shell 100, ensuring that all coolant is filtered through the filter 113; the waste liquid inlet pipe 115 serves as the coolant inlet, and its position is aligned with the middle of the metal filter 113, so that the coolant is evenly spread on the surface of the filter 113, increasing the filtration contact area.

[0031] It should be noted that the circular rotation design of the annular metal filter 113 not only extends the effective filtering path of the filter, but also prevents the filter residue from accumulating and clogging at a certain place through continuous movement.

[0032] Further, if Figures 5 to 7 As shown, the collecting component 12 includes: A rotating rod 121 , wherein the rotating rod 121 is a rotating device on the housing 100 ; A driven roller 122 , the driven roller 122 being connected to the rotating rod 121 and configured to support and rotate with the metal filter 113 ; Push bars 123 , a plurality of which are provided along the circumference and connect the two driven rollers 122 ; A fixing sleeve 124 is provided on the housing 100 and defines a limiting groove 1241; A pull-out collection box 125 is slidably disposed inside the fixed sleeve 124 via a guide rail, and the pull-out collection box 125 is further provided with a limit block 1251; The centering strip 126 is provided above the metal filter screen 113 and is used to gather the coolant residue to the center.

[0033] In this embodiment, by providing the collection assembly 12, the function of targeted collection and convenient cleaning of the filter residue filtered out by the metal filter 113 is achieved, thereby achieving the effect of maintaining the continuous operation of the coarse filtration mechanism and avoiding the accumulation of filter residue affecting the filtration efficiency.

[0034] In detail, the rotating rod 121 is rotatably installed on the housing 100 as a supporting base. After the driven roller 122 is connected to the rotating rod 121, it rotates synchronously around the rotating rod 121 as the metal filter screen 113 rotates. Its surface contacts the inner side of the metal filter screen 113, providing support for the metal filter screen 113, so that the filter residue can move smoothly with the filter screen to the collection area. The pushing bar 123 is evenly fixed between the two driven rollers 122 along the circumference. When the driven roller 122 rotates, the pushing bar 123 rotates synchronously with the driven roller 122, and its end contacts the filter residue on the outer side of the metal filter screen 113, pushing the filter residue on the filter screen upward, and cooperating with the guiding effect of the centering bar 126 to make the filter residue gather in the middle, so that the filter residue falls into the pull-out collection box 125 below under the action of gravity, completing the collection of the filter residue; The fixed sleeve 124 is fixed on the outer shell 100, and its internal guide rail groove slides with the guide rail on the outside of the pull-out collection box 125. The pull-out collection box 125 is engaged with the limit groove 1241 of the fixed sleeve 124 through the limit block 1251. When the filter residue needs to be cleaned, the operator can pull the collection box outward along the guide rail, and the limit block 1251 slides along the limit groove 1241 to the end and then disengages. The collection box can be taken out and the filter residue can be dumped. After cleaning, it is pushed back along the original path, and the limit block 1251 is embedded in the limit groove 1241 again to ensure that the collection box is firmly positioned to prevent the filter residue from leaking due to displacement due to vibration during the filtration process.

[0035] Further, if Figure 8 As shown, the cleaning component 13 includes: A cleaning motor 131 , the cleaning motor 131 being mounted on the housing 100 ; A turntable 132 , the turntable 132 being drivingly connected to the output shaft of the cleaning motor 131 ; a connecting plate 133 rotatably connected to the rotating disk 132 ; a reciprocating plate 134 slidably disposed in a slide groove inside the housing 100 , and the reciprocating plate 134 is rotatably connected to the connecting plate 133 ; Brush 1341, the brush 1341 is provided on the reciprocating plate 134 for cleaning the filter to prevent clogging.

[0036] In this embodiment, by providing the cleaning component 13, a dynamic cleaning function of the filter residue on the surface of the metal filter is achieved, thereby preventing the filter pores from being blocked and maintaining a stable filtering efficiency.

[0037] In detail, the cleaning motor 131 is fixedly installed on the outside of the housing 100, and its output shaft is rigidly connected to the central axis of the turntable 132. When the cleaning motor 131 is powered on, it drives the turntable 132 to perform circular motion around the axis. The edge of the turntable 132 is rotatably connected to one end of the connecting plate 133 through a pin, and the other end of the connecting plate 133 is rotatably connected to the top of the reciprocating plate 134 through a pin, forming a crank slider mechanism. The bottom of the reciprocating plate 134 is embedded in the horizontal slide groove on the inner wall of the housing 100. The slide groove constrains the movement trajectory of the reciprocating plate 134, so that it can only perform linear reciprocating motion along the length direction of the filter screen. When the turntable 132 rotates, the connecting plate 133 converts the circular motion of the turntable 132 into a linear reciprocating motion of the reciprocating plate 134, and the bristles 1341 installed at the bottom of the reciprocating plate 134 synchronously sweep back and forth across the surface of the metal filter. The bristles 1341 are made of elastic nylon, which has a hardness slightly lower than that of the metal wire of the filter. During the reciprocating motion, they can effectively scrape off the fine filter residue adhering to the pores of the filter while avoiding rigid damage to the filter.

[0038] Further, if Figures 9 and 10 As shown, it also includes: a centrifugal filtering mechanism 2, the centrifugal filtering mechanism 2 includes: A booster assembly 21, which is disposed inside the housing 100 and is used to allow the coolant to flow at high speed in preparation for centrifugal filtration; The centrifugal filter assembly 22 is configured to allow high-speed liquid to undergo centrifugal motion therein, thereby allowing impurities to settle and allowing clean coolant to flow out from above.

[0039] In this embodiment, by providing a centrifugal filtering mechanism 2, a centrifugal separation function is achieved for the coolant after coarse filtration, thereby achieving the effect of removing fine particle impurities and improving the cleanliness of the coolant.

[0040] Further, if Figures 9 and 10 As shown, the boost component 21 includes: A liquid collecting pan 211 is provided inside the housing 100 for storing the preliminarily filtered coolant; A liquid level sensor 212 is used to detect the height of the coolant stored in the liquid collecting pan 211; a downpipe 213 , the downpipe 213 being in communication with the liquid collecting tray 211 ; A pressure pump 214 is installed on the liquid collecting tray 211 and a liquid inlet of the pressure pump 214 is connected to the downpipe 213 .

[0041] In this embodiment, by providing a booster assembly 21, the functions of storage, liquid level monitoring and pressurized delivery of the coolant after preliminary filtration are realized, thereby achieving the effect of providing stable high-speed fluid power for centrifugal filtration.

[0042] In detail, the liquid collecting pan 211 is fixed inside the shell 100, and its open end receives the preliminary filtered coolant discharged by the coarse filtering mechanism. The bottom is connected to the liquid inlet of the pressure pump 214 through the downpipe 213. The liquid level sensor 212 is vertically installed on the inner wall of the liquid collecting pan 211 to detect the liquid level in real time and convert it into an electrical signal to transmit to the control system. When the liquid level rises to the set threshold, the control system triggers the pressure pump 214 to start. The pressure pump 214 applies pressure to the coolant in the downpipe 213 through the rotation of the impeller, causing it to flow at high speed and be transported to the centrifugal filter assembly 22, and the impurities are separated by the centrifugal force generated by the high-speed flow of the coolant.

[0043] It should be noted that the pressure pump 214 is a diaphragm pump, which completely isolates the conveying medium from the driving components through the diaphragm and is not prone to clogging.

[0044] Further, if Figures 9 and 10 As shown, the centrifugal filter assembly 22 includes: a centrifugal tank 221, wherein the liquid inlet of the centrifugal tank 221 is connected to the liquid outlet of the pressure pump 214; The impurity settling tank 222 is connected to the bottom of the centrifugal tank 221 and is used to store the filter residue in the coolant; The connecting pipe 223 is connected to the liquid outlet of the centrifugal tank 221, and the liquid outlet is used to flow out clean coolant.

[0045] In this embodiment, by providing the centrifugal filter assembly 22, the centrifugal separation function of the coolant after coarse filtration is achieved, thereby achieving the effect of removing fine particle impurities and improving the cleanliness of the coolant.

[0046] In detail, the pressure pump 214 pressurizes the coolant after preliminary filtration and then transports it from the liquid inlet of the centrifugal tank 221 to the centrifugal tank 221. The high-speed flowing coolant performs centrifugal motion in the centrifugal tank 221. Due to the high density of the impurities, they are thrown to the tank wall of the centrifugal tank 221 under the action of centrifugal force and gradually settle to the bottom of the tank, while the clean coolant with lower density gathers in the middle area of ​​the centrifugal tank 221. As the centrifugal filtration proceeds, the impurities settled to the bottom of the tank enter the settling tank 222 through the connecting port between the bottom of the centrifugal tank 221 and the settling tank 222 for storage, and the clean coolant flows out from the liquid outlet at the top of the centrifugal tank 221 through the connecting pipe 223, completing the centrifugal filtration process. This design uses centrifugal force to achieve efficient separation of impurities and coolant, can effectively remove the fine particulate impurities remaining in the coolant after coarse filtration, improves the cleanliness of the coolant, and provides a better quality liquid to be filtered for subsequent membrane filtration.

[0047] Example 2 like Figures 11 to 14As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: In this embodiment, the membrane filtration mechanism 3 is further included. The membrane filtration mechanism 3 includes: A membrane filter assembly 31 is disposed inside the housing 100 and is used to finely filter the coolant; The pressure washing component 32 drives the coolant to pass through the filter membrane in the reverse direction through the upper and lower pressure differences, so that the filter residue adhering to the surface of the filter membrane falls off.

[0048] In this embodiment, a membrane filtration mechanism 3 is provided, in which the membrane filtration component 31 and the pressure washing component 32 cooperate with each other to achieve the functions of fine filtration of the coolant and cleaning of the filter residue on the surface of the filter membrane, thereby further improving the purity of the coolant, preventing the filter membrane from being blocked, and maintaining the membrane filtration efficiency.

[0049] Further, if Figures 11 to 14 As shown, the membrane filtration component 31 includes: Lower cylinder 311; An upper cylinder 312 , with a filter membrane 313 disposed between the upper cylinder 312 and the lower cylinder 311 ; a liquid inlet pipe 314 , the liquid inlet pipe 314 being in communication with the lower cylinder 311 ; a first solenoid valve 315 , which is disposed on the liquid inlet pipe 314 and prevents the coolant in the lower cylinder 311 from flowing out of the liquid inlet pipe 314 when cleaning the surface of the filter membrane 313 ; a liquid outlet pipe 316 , the liquid outlet pipe 316 being in communication with the upper cylinder body 312 ; a waste pipe 317 , the waste pipe 317 being in communication with the lower cylinder 311 ; The second solenoid valve 318 is provided on the exhaust pipe 317 and is used to control whether to discharge the coolant residue accumulated in the lower cylinder 311 .

[0050] In this embodiment, by providing the membrane filtration assembly 31, the functions of fine filtration of the coolant and discharge of filter residue are achieved, thereby achieving the effect of improving the purity of the coolant and facilitating the cleaning of the filter residue.

[0051] Specifically, the liquid inlet pipe 314 delivers the centrifugally filtered coolant to the lower cylinder 311. As the coolant passes through the filter membrane 313 from bottom to top, the filter membrane 313 intercepts tiny impurities, and the pure coolant enters the upper cylinder 312 and flows out through the liquid outlet pipe 316, completing fine filtration. When the filter membrane 313 needs to be cleaned, the first solenoid valve 315 is closed to block the connection between the liquid inlet pipe 314 and the lower cylinder body 311, thereby preventing the coolant from flowing back from the liquid inlet pipe 314 during cleaning; at the same time, the cylinder 321 of the pressure washing assembly 32 drives the upper piston 324 to move downward, so that the filtered coolant in the upper cylinder body 312 passes through the filter membrane 313 in the reverse direction under the action of pressure, and the impurities adhered to the surface of the filter membrane are flushed into the lower cylinder body 311. This process is repeated many times. When a large amount of impurities accumulates, the second solenoid valve 318 is opened, and the impurities are discharged from the exhaust pipe 317 along with the coolant.

[0052] It should be noted that the filter membrane 313 uses high-precision filter material, and its microporous structure can effectively intercept impurities with a particle size of microns. The split design of the upper cylinder body 312 and the lower cylinder body 311 is convenient for disassembly and maintenance, ensuring the long-term and stable operation of the membrane filtration component.

[0053] Further, if Figures 11 to 12 As shown, the pressure washing assembly 32 includes: A cylinder 321 is installed inside the housing 100; A lower piston 322 connected to the ejector rod of the cylinder 321; a connecting shaft 323 , the connecting shaft 323 being connected to the lower piston 322 and passing through the lower cylinder 311 and the upper cylinder 312 ; The upper piston 324 is connected to the connecting shaft 323 and is slidably disposed in the upper cylinder body 312 .

[0054] In this embodiment, by providing the pressure washing component 32, a backwashing function of the filter membrane 313 is achieved, thereby achieving the effect of removing impurities on the surface of the filter membrane and restoring the filtration efficiency.

[0055] When the filter membrane 313 needs to be cleaned, the top rod of the cylinder 321 pushes the lower piston 322 downward, and the lower piston 322 drives the upper piston 324 to move downward synchronously through the connecting shaft 323. The downward movement of the upper piston 324 reduces the space in the upper cylinder body 312 and increases the air pressure. At the same time, the downward movement of the lower piston 322 causes the space in the lower cylinder body 311 to increase and the air pressure to decrease. This pressure difference forces the clean coolant in the upper cylinder body 312 to reverse through the filter membrane 313 and be discharged from the exhaust pipe 317 of the lower cylinder body 311, thereby flushing away impurities adhering to the bottom of the filter membrane 313. The precise stroke control of the cylinder 321 ensures that the upper piston 324 can generate a sufficient pressure difference, making the reverse flushing effect better. The design of the connecting shaft 323 passing through the lower cylinder body 311 and the upper cylinder body 312 ensures the synchronous movement of the lower piston 322 and the upper piston 324, making the pressure difference more stable.

[0056] It should be noted that the liquid outlet pipe 316 on the upper cylinder body 312 is at a certain height from the bottom. The upper cylinder body 312 can store coolant for reverse cleaning. During reverse flushing, the first solenoid valve 315 and the second solenoid valve 318 are both in a closed state.

[0057] Example 3 like Figure 1 As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The differences between the third embodiment and the first embodiment are: This embodiment provides a high-precision CNC thread grinder, comprising a machine tool body 200, a clamping device 300 arranged on one side of the machine tool body 200, the driving device 400 arranged on one side of the clamping device 300, the grinding device 500 arranged on the driving device 400, and the grasping device 600 arranged close to the clamping device 300; it is characterized in that it also includes a grinding fluid filtration system for a grinder according to any one of claims 1 to 9, the filter assembly 700 is arranged on one side of the machine tool body 200, and the cutting fluid and impurities after grinding are filtered by the filter assembly 700 and recycled.

[0058] Working process During the filtering operation, the driving motor 111 of the moving component 11 in the coarse filtering mechanism 1 drives the annular metal filter screen 113 to rotate, and the cutting fluid after grinding by the thread grinder flows in through the waste liquid inlet pipe 115, is filtered by the metal filter screen 113, and the push bar 123 of the collecting component 12 pushes the filter residue to the pull-out collection box 125. The bristles 1341 of the cleaning component 13 clean the filter screen, and the preliminary filtered liquid flows into the liquid collection tray 211. The pressure pump 214 of the boosting component 21 in the centrifugal filtering mechanism 2 sends the coolant after coarse filtration into the centrifugal tank 221 of the centrifugal filtering component 22 for centrifugal separation, and impurities are settled in the impurity settling tank 222. The clean coolant enters the membrane filtering mechanism 3 through the connecting pipe 223. The filter membrane 313 of the membrane filtering component 31 in the membrane filtering mechanism 3 finely filters the coolant and then circulates it back into the grinding machine tool through the pipeline for recycling. The cylinder 321 of the pressure washing component 32 drives the piston to make the coolant pass through the filter membrane in the reverse direction, and the impurities are discharged from the impurity discharge pipe 317.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A grinding fluid filtration system for a grinding machine, comprising: The filter assembly (700) is characterized in that the filter assembly (700) comprises: a coarse filter mechanism (1), and the coarse filter mechanism (1) comprises: A moving component (11) disposed inside the housing (100) for filtering coolant residue, a collecting component (12) disposed on the moving component (11) for collecting the residue, and a cleaning component (13) disposed on the moving component (11) for cleaning the filter screen; The coolant enters the filter screen in the moving component (11), and the moving component (11) drives the filter residue in the coolant to move, and the filter residue falls into the collecting component (12) for collection, and the cleaning component (13) cleans the filter screen to prevent the filter screen from being blocked; The mobile component (11) comprises: a driving motor (111), the driving motor (111) being mounted on the housing (100); A driving roller (112), the driving roller (112) being drivingly connected to an output shaft of the driving motor (111); a metal filter screen (113), wherein the metal filter screen (113) is annular; Rubber pads (114), the rubber pads (114) being arranged on both sides of the metal filter (113) and used to seal the gap between the metal filter (113) and the housing (100) to prevent leakage of coolant; A waste liquid inlet pipe (115) is provided, through which the cooling liquid enters and falls onto the metal filter screen (113).

2. A grinding fluid filtration system for a grinding machine according to claim 1, characterized in that: The collecting assembly (12) comprises: A rotating rod (121), wherein the rotating rod (121) rotates the device on the housing (100); A driven roller (122), the driven roller (122) being connected to the rotating rod (121) and used to support and rotate along with the metal filter (113); Push bars (123), a plurality of push bars (123) are provided along the circumference and connect the two driven rollers (122); A fixing sleeve (124), the fixing sleeve (124) is arranged on the housing (100) and has a limiting groove (1241); A pull-out collection box (125), the pull-out collection box (125) is slidably arranged inside the fixed sleeve (124) via a guide rail, and the pull-out collection box (125) is also provided with a limiting block (1251); A centering strip (126) is provided above the metal filter screen (113) and is used to gather coolant filter residue toward the center.

3. The grinding fluid filtration system for a grinding machine according to claim 1, characterized in that: The cleaning component (13) comprises: a cleaning motor (131), the cleaning motor (131) being mounted on the housing (100); a rotating disk (132), the rotating disk (132) being drivingly connected to an output shaft of the cleaning motor (131); a connecting plate (133), the connecting plate (133) being rotatably connected to the rotating disk (132); a reciprocating plate (134), the reciprocating plate (134) being slidably disposed in a slide groove inside the housing (100), and the reciprocating plate (134) being rotationally connected to the connecting plate (133); Brush bristles (1341), the brush bristles (1341) are arranged on the reciprocating plate (134) and are used to clean the filter screen to prevent clogging.

4. The grinding fluid filtration system for a grinding machine according to claim 1, characterized in that: Also includes: A centrifugal filtration mechanism (2), comprising: A booster assembly (21), the booster assembly (21) being disposed inside the housing (100) and used to allow the coolant to flow at high speed in preparation for centrifugal filtration; The centrifugal filter assembly (22) is configured to cause a high-speed liquid to move centrifugally therein, thereby allowing impurities to settle and allowing clean coolant to flow out from above.

5. A grinding fluid filtration system for a grinding machine according to claim 4, characterized in that: The boost component (21) comprises: a liquid collecting tray (211), the liquid collecting tray (211) being arranged inside the housing (100) and used for storing the preliminarily filtered coolant; a liquid level sensor (212), the liquid level sensor (212) being used to detect the height of the coolant stored in the liquid collecting pan (211); a downpipe (213), the downpipe (213) being in communication with the liquid collecting tray (211); A pressure pump (214) is installed on the liquid collecting tray (211) and a liquid inlet of the pressure pump is connected to the downpipe (213).

6. A grinding fluid filtration system for a grinding machine according to claim 5, characterized in that: The centrifugal filter assembly (22) comprises: a centrifugal tank (221), wherein the liquid inlet of the centrifugal tank (221) is connected to the liquid outlet of the pressure pump (214); a sedimentation tank (222), the sedimentation tank (222) being in communication with the bottom of the centrifugal tank (221) and being used for storing filter residue in the coolant; A connecting pipe (223) is connected to the liquid outlet of the centrifugal tank (221), and the liquid outlet is used to discharge clean cooling liquid.

7. The grinding fluid filtration system for a grinding machine according to claim 1, characterized in that: Also includes: A membrane filtration mechanism (3), wherein the membrane filtration mechanism (3) comprises: A membrane filtration component (31), the membrane filtration component (31) is arranged inside the housing (100) and is used to perform fine filtration on the coolant; The pressure washing component (32) drives the coolant to pass through the filter membrane in the reverse direction through the upper and lower pressure differences, so that the filter residue adhering to the surface of the filter membrane falls off.

8. The grinding fluid filtration system for a grinding machine according to claim 7, characterized in that: The membrane filtration assembly (31) comprises: Lower cylinder (311); an upper cylinder (312), wherein a filter membrane (313) is provided between the upper cylinder (312) and the lower cylinder (311); a liquid inlet pipe (314), the liquid inlet pipe (314) being in communication with the lower cylinder (311); a first solenoid valve (315), the first solenoid valve (315) being arranged on the liquid inlet pipe (314) and preventing the coolant in the lower cylinder (311) from flowing out of the liquid inlet pipe (314) when cleaning the surface of the filter membrane (313); a liquid outlet pipe (316), the liquid outlet pipe (316) being in communication with the upper cylinder body (312); a waste discharge pipe (317), the waste discharge pipe (317) being in communication with the lower cylinder (311); A second solenoid valve (318) is provided on the exhaust pipe (317) and is used to control whether to discharge the coolant residue accumulated in the lower cylinder (311).

9. The grinding fluid filtration system for a grinding machine and the high-precision CNC thread grinder used therefor according to claim 8, characterized in that: The pressure washing assembly (32) comprises: A cylinder (321), the cylinder (321) being installed inside the housing (100); a lower piston (322), the lower piston (322) being connected to the ejector rod of the cylinder (321); A connecting shaft (323), the connecting shaft (323) is connected to the lower piston (322) and passes through the lower cylinder (311) and the upper cylinder (312); An upper piston (324), the upper piston (324) is connected to the connecting shaft (323) and is slidably disposed in the upper cylinder body (312).

10. A high-precision CNC thread grinding machine, comprising a machine tool body (200), a clamping device (300) arranged on one side of the machine tool body (200), a driving device (400) arranged on one side of the clamping device (300), a grinding device (500) arranged on the driving device (400), and a gripping device (600) arranged close to the clamping device (300); characterized in that: It also includes a grinding fluid filtration system for a grinding machine as described in any one of claims 1 to 9, wherein the filter assembly (700) is arranged on one side of the machine tool body (200), and the cutting fluid and impurities after grinding are filtered by the filter assembly (700) and then recycled.

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