A cooling device for numerically controlled machine tools

Abstract

The present invention relates to the technical field of cutting machine tools, and specifically discloses a cooling device for numerically controlled machine tools, wherein the inner cavity of the machine tool body has a workbench for carrying a workpiece, a cutting mechanism includes a cutting tool disposed above the workbench and used for cutting the workpiece, a spray head adjacent to the cutting tool and used for spraying cutting fluid, a feed port is formed in the side space of the workbench, the workbench is inclined toward the feed port, a rotating member is rotatably installed in the inner cavity and driven by a rotating device, a primary screening member is slidably assembled on the rotating member and used for receiving metal chips falling from the feed port, an elastic member connects the rotating member and the primary screening member, and a material guide mechanism is disposed below the primary screening member and used for guiding metal chips outward. The cooling device for numerically controlled machine tools of the present invention realizes the shedding of metal chips from the primary screening member through the flipping and vibration of the primary screening member, thereby ensuring the screening capacity of the primary screening member.

Description

Technical Field

[0001] The invention relates to the technical field of cutting machine tools, and in particular to a cooling device for a numerically controlled machine tool. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. It is mainly composed of CNC device, servo mechanism and machine tool body. It controls the movement and operation of the machine tool body through digital information to achieve high-precision and high-efficiency processing. Chip fluid, also known as coolant or cutting oil, plays a vital role in machine tool processing. It is mainly used to cool the tool and workpiece, lubricate the cutting interface, clean the working area and prevent corrosion of the workpiece and tool.

[0003] The Chinese patent application with publication number CN113894613A discloses a CNC machine tool cutting fluid recovery and cooling device, including a frame and a screening mechanism, the screening mechanism including fixed slides arranged at the front and rear sides of the top of the frame and a screening plate slidably connected between the fixed slides, and a rodless cylinder is arranged on the right side of the top of the rear fixed slide, and the rodless cylinder is connected to the screening plate. When people need to recover the CNC machine tool cutting fluid, it is necessary to remove the metal impurities contained in the cutting fluid, and the cutting fluid can be introduced into the screening plate, and the rodless cylinder drives the screening plate to move left and right continuously, and the screening plate screens the cutting fluid, thereby realizing the separation of the cutting fluid and the metal impurities.

[0004] However, since the composition of metal impurities is more complex and often contains metal chips in the form of particles, after a period of use, the fine metal chips may clog the screening plate, thereby reducing the screening capacity of the screening plate and affecting the separation effect of the cutting fluid and metal impurities. Summary of the invention

[0005] The invention provides a cooling device for a numerically controlled machine tool, aiming to solve the problem in the related art that the screening capacity of a screening plate is reduced due to clogging of metal chips.

[0006] The cooling device of a numerically controlled machine tool of the present invention comprises a machine tool body, a cutting mechanism, a screening mechanism and a material guiding mechanism, wherein the cutting mechanism is arranged in the inner cavity of the machine tool body, and the inner cavity of the machine tool body has a workbench for carrying a workpiece, and the cutting mechanism comprises a cutting tool arranged above the workbench and used for cutting the workpiece, and a spray head adjacent to the cutting tool and used for spraying cutting fluid, a feed port is formed in the side space of the workbench, and the workbench is inclined toward the feed port so that the cutting fluid can bring metal chips into the feed port, and the screening mechanism is located directly below the feed port, and comprises a rotating member, a primary screening member and an elastic member, and the rotating member is rotatably installed in the inner cavity and driven by a rotating device; the primary screening member comprises a double A layer of sieve plates is formed between the double-layer sieve plates, and a sealing member with a liquid through hole is slidably mounted in the interlayer, one end of the sealing member is elastically connected to the primary sieve member, and the other end protrudes out of the interlayer, and under normal conditions, the liquid through hole and the sieve hole of the double-layer sieve plate are connected to each other for passing cutting fluid, and when the primary sieve member flips half a circle, the other end of the sealing member is squeezed by the cavity wall of the inner cavity and retracts into the interlayer, and the liquid through hole and the sieve hole are misaligned; the primary sieve member is slidably mounted on the rotating member and is used to receive metal chips falling from the feeding port, and the elastic member connects the rotating member and the primary sieve member; the material guiding mechanism is arranged below the primary sieve member and is used to guide metal chips outward.

[0007] The effect is that when the workpiece is cut, the cutting fluid brings the metal chips to the primary screening part through the feed port, and the primary screening part screens the cutting fluid and metal chips to separate the two. After the workpiece is processed, the primary screening part completes the screening work synchronously, and the rotating device drives the primary screening part to flip half a circle. The metal chips on the primary screening part can fall under the action of gravity, thereby separating from the primary screening part, reducing the blockage of the primary screening part, ensuring the subsequent screening ability of the primary screening part, and then ensuring the separation effect of the cutting fluid and metal chips. In addition, the metal wire strips cut on the workbench can be dialed into the feed port so that they fall on the primary screening part, causing the primary screening part to vibrate and accelerate the separation of the metal chips on it. When the primary screening part flips half a circle, the blocking part realizes the automatic blocking of the primary screening part, avoiding the cutting fluid on the metal wire strips from passing through the primary screening part and causing waste.

[0008] Preferably, the screening mechanism also includes a secondary screening component, which is located below the primary screening component and is used to receive the metal wire strips thrown when the primary screening component is reset. The secondary screening component is slidably assembled in the inner cavity left and right and driven by a power component to slide back and forth so as to separate the metal wire strips and the cutting fluid.

[0009] Preferably, the cooling device of the CNC machine tool also includes a shifting mechanism, which includes a lifting platform arranged above the re-screening component and a plurality of shifting components arranged on the lifting platform, the lifting platform is slidably assembled in the inner cavity and driven to move up and down by a driving component, when the re-screening component slides close to the lifting platform, the shifting component is lifted to avoid the metal wire strips on the re-screening component, and when the re-screening component moves away from the lifting platform, the shifting component falls to block the metal wire strips on the re-screening component.

[0010] The effect is that the setting of the shifting member makes the metal wire strip step to one side for a certain distance each time the re-screening member slides back and forth until the metal wire strip moves out of the re-screening member, thereby avoiding manual cleaning of the screened metal wire strip on the re-screening member, saving time and effort. The metal wire strip moves out of the re-screening member in a step-by-step manner, extending its retention time on the re-screening member and ensuring its sufficient screening with the cutting fluid.

[0011] Preferably, the shifting mechanism further comprises a plurality of return members arranged on the re-screening member, and the return members are used to move the metal wire strip at the shifting member back when the re-screening member is away from the lifting platform.

[0012] The effect is that the pull-back piece stretches the metal wire strip, so that the inner layer and the center part of the metal wire strip can be exposed, making it easier to screen the cutting fluid in this part.

[0013] Preferably, the return member is vertically slidably inserted into the re-screening member, and the return members are connected via a connecting frame located below the re-screening member. A push plate is elastically slidably connected to the machine tool body, and the push plate pushes the connecting frame from bottom to top. A transmission assembly is also provided between the connecting frame and the primary screening member, which is used to control the connecting frame to move downward when the re-screening member is away from the lifting platform, so that the return member is hidden in the re-screening member.

[0014] Preferably, the transmission assembly includes a trapezoidal plate fixed on the primary screening member and a convex tooth formed on the connecting frame. When the secondary screening member slides close to the lifting platform, the convex tooth can pass over the trapezoidal plate through the oblique edge on one side of the trapezoidal plate. When the secondary screening member moves away from the lifting platform, the convex tooth can be pressed into the bottom surface of the trapezoidal plate through the oblique edge on the other side of the trapezoidal plate, thereby driving the connecting frame to move downward.

[0015] The effect is that when the connecting frame moves downward, the return member is hidden in the re-screening member, so that the return member is separated from the metal wire strip, avoiding the metal wire strip from being moved to the original position, and maintaining the state of the metal wire strip being stepped out.

[0016] Preferably, the material guiding mechanism includes a material receiving box fixedly mounted on the outside of the machine tool body, a material guiding plate which can slide left and right in the material receiving box, and a linear driving member installed on the material receiving box and driving the material guiding plate to slide. The machine tool body is provided with an opening which connects the inner cavity and the material receiving box and allows the material guiding plate to pass through. After the material guiding plate enters the inner cavity, it is used to receive the metal debris dropped by the primary screening member when it is flipped, and guide it into the material receiving box.

[0017] Preferably, the material guide plate includes a vertical plate slidably assembled in the material receiving box and an inclined plate hinged on the vertical plate, and both sides of the inclined plate form a retaining edge for preventing metal debris from overflowing; the machine tool body is elastically slidably connected to a push piece extending into the opening, and the push piece presses against the inclined plate.

[0018] Preferably, the cooling device of the CNC machine tool also includes a cleaning mechanism, which includes a cleaning member that can slide left and right on the workbench, and a linear driving member installed on the machine tool body and driving the cleaning member to slide, and the cleaning member is used to scrape metal impurities on the workbench to the feed port when sliding.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0020] The present invention drives the primary screening part to flip through a rotating device, so that the metal chips on the primary screening part fall due to gravity, thereby achieving separation from the primary screening part, reducing the blockage of the primary screening part, ensuring the subsequent screening ability of the primary screening part, and further ensuring the separation effect of the cutting fluid and the metal chips. In addition, the metal wire strips cut on the workbench can be put into the primary screening part through the feeding port, causing the primary screening part to vibrate and accelerate the shedding of the metal chips on the primary screening part. When the primary screening part flips half a circle, the blocking part realizes automatic blocking of the primary screening part, avoiding the cutting fluid on the metal wire strips from passing through the primary screening part and causing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the appearance of the cooling device for a numerically controlled machine tool of the present invention.

[0022] Figure 2 It is a cross-sectional schematic diagram of a cooling device for a numerically controlled machine tool of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the primary screening component part of the present invention.

[0024] Figure 4 It is an axonometric schematic diagram of the lifting platform to the re-screening element portion of the present invention.

[0025] Figure 5 It is an axonometric schematic diagram of the connecting frame to the return member of the present invention.

[0026] Figure 6 It is a three-dimensional schematic diagram of the part from the material receiving box to the material guide plate of the present invention.

[0027] Figure 7 It is a cross-sectional schematic diagram of the main body of the machine tool of the present invention.

[0028] Reference numerals:

[0029] 1. Machine tool body; 11. Workbench; 12. Material transfer port; 13. Material return bin;

[0030] 21. Cutting tool; 22. Sprinkler head;

[0031] 31. Rotating member; 32. Primary screening member; 321. Front; 322. Back; 323. Double-layer sieve plate; 324. Blocking member; 324a. Liquid-passing hole; 325. Trapezoidal plate; 33. Centering spring; 34. Rotating motor; 35. Secondary screening member; 36. Power member; 361. Rack; 362. Incomplete gear; 363. Power motor;

[0032] 41. material receiving box; 42. material guide plate; 421. vertical plate; 422. inclined plate; 422a. retaining edge; 422b. material discharge port; 43. linear drive member; 44. push member;

[0033] 51. Cleaning member; 52. Linear drive member;

[0034] 61. Lifting platform; 62. Driving member; 621. Cam; 622. Driving motor; 63. Shift member; 64. Retracting member; 65. Connecting frame; 651. Connecting strip; 652. Transverse plate; 653. Protruding teeth; 66. Support plate; 661. Push spring; 67. Push plate. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] Combine the following Figures 1 to 7 The cooling device for a numerically controlled machine tool of the present invention is described.

[0037] like Figure 1 , Figure 2 and Figure 7 As shown, the cooling device for a numerically controlled machine tool of the present invention comprises a machine tool body 1, a cutting mechanism, a screening mechanism, a cleaning mechanism, a material guiding mechanism and a shifting mechanism.

[0038] The machine tool body 1 has an inner cavity for accommodating various processing tools and providing a processing environment for work. A workbench 11 for carrying workpieces is fixed in the inner cavity, and a material port 12 is formed on the left side of the workbench 11, and the workbench 11 is slightly inclined toward the material port 12.

[0039] The cutting mechanism is arranged in the inner cavity, and includes a cutting tool 21 and a spray head 22. The cutting tool 21 is arranged above the workbench 11 and is used to cut the workpiece, and forms fine metal chips and spirally coiled metal wire strips during cutting. The spray head 22 is arranged adjacent to the cutting tool 21 and is used to spray cutting fluid to the cutting tool 21 and the workpiece, so as to cool the cutting tool 21 and the workpiece and clean the working area at the same time. The cleaned cutting fluid flows toward the feed port 12 along the inclined direction of the workbench 11. Since the metal chip particles are small and light, the cutting fluid can easily bring them into the feed port 12.

[0040] Continue to refer Figure 2 and Figure 3 The screening mechanism is located directly below the feed port 12, and includes a rotating member 31, a primary screening member 32 and an elastic member. The rotating member 31 is rotatably mounted in the inner cavity and driven by a rotating device. In this embodiment, the rotating device can directly adopt a rotating motor 34 mounted on the machine tool body 1, and the rotating motor 34 is connected to the rotating member 31 to drive its rotation. A vertical chute is provided inside the rotating member 31, and the primary screening member 32 has a slider that slides in the chute. In the initial state, the upper surface of the primary screening member 32 is set as the front surface 321, and the lower surface is set as the back surface 322. The front surface 321 of the primary screening member 32 is used to receive the metal chips falling from the feed port 12. The cutting fluid falling with the metal chips flows downward through the primary screening member 32, and the metal chips are retained on the front surface 321. Thus, the primary screening member 32 realizes the screening of metal chips and cutting fluid, and realizes the separation of the two. The elastic member connects the rotating member 31 and the primary screening member 32 . In this embodiment, the elastic member includes two centering springs 33 disposed opposite to the upper and lower sides of the primary screening member 32 . Each centering spring 33 is located in the slide groove and connects the primary screening member 32 and the rotating member 31 .

[0041] When the workpiece is being cut, the cutting fluid will continuously spray the metal chips onto the primary screening member 32 for screening. After the workpiece is processed, the cutting fluid stops spraying, and the primary screening member 32 also simultaneously completes the separation of the cutting fluid and the metal chips. Due to the accumulation of metal chips, some or all of the sieve holes of the primary screening member 32 may be blocked. The rotating device can drive the rotating member 31 to flip half a circle, that is, 180 degrees. The rotating member 31 drives the primary screening member 32 to flip half a circle. For ease of understanding, Figure 2The direction indicated by the middle arrow A is set as the flipping direction. At this time, the front side 321 and the back side 322 of the primary screening element 32 are swapped, that is, the front side 321 faces downward and the back side 322 faces upward. As a result, the metal chips retained on the front side 321 can fall under the action of gravity, thereby separating from the primary screening element 32, reducing the blockage of the primary screening element 32, ensuring the subsequent screening ability of the primary screening element 32, and further ensuring the separation effect of the cutting fluid and metal chips.

[0042] Continue to refer Figure 1 , Figure 2 and Figure 6 The material guide mechanism is arranged below the primary screening member 32 and is used to guide the metal chips outward. The material guide mechanism includes a material receiving box 41, a material guide plate 42 and a linear drive member 43. The material receiving box 41 is fixedly arranged outside the machine tool body 1. The material guide plate 42 can slide left and right in the material receiving box 41. The linear drive member 43 is installed on the material receiving box 41 and is used to drive the material guide plate 42 to slide. The linear drive member 43 includes but is not limited to a threaded mechanism, an electric slide rail or a telescopic cylinder. The machine tool body 1 is provided with an opening connecting the inner cavity and the material receiving box 41 and for the material guide plate 42 to pass through. When the primary screening member 32 screens the metal chips and the cutting fluid, the material guide plate 42 is close to the outside of the machine tool body 1, so that the cutting fluid falling from the primary screening member 32 can be avoided. When the primary screening member 32 turns over half a circle, the guide plate 42 can penetrate into the inner side of the inner cavity until it reaches directly below the primary screening member 32, so that the metal chips on the front side 321 of the primary screening member 32 can be caught by the guide plate 42 when they fall, and the guide plate 42 guides them into the receiving box 41 for recycling.

[0043] After the recycling is completed, a small amount of metal scraps will remain on the guide plate 42. In order to clean up these metal scraps, the guide plate 42 includes a vertical plate 421 and an inclined plate 422. The vertical plate 421 is slidably assembled in the material receiving box 41, and the linear drive member 43 drives the vertical plate 421 to slide. The inclined plate 422 is hinged at the top of the vertical plate 421, and the front and rear sides of the inclined plate 422 are formed with a retaining edge 422a for preventing the metal scraps from overflowing. The machine tool body 1 is provided with a guide groove located below the opening and connected to the opening, and a push piece 44 is vertically slidably matched in the guide groove. The bottom end of the push piece 44 is connected to the machine tool body 1 through a compression spring, and the top end extends into the opening and presses against the inclined plate 422. At the end of recycling, the guide plate 42 can slide to the outside of the machine tool body 1, and the inclined plate 422 moves outward and the center of gravity gradually moves outward away from the push piece 44, and the weight of the inclined plate 422 acting on the push piece 44 gradually decreases, and the push piece 44 can push the inclined plate 422 to deflect upward. On the one hand, the inclination angle of the inclined plate 422 is increased, which is more conducive to the sliding of metal chips on the inclined plate 422. On the other hand, the inclined plate 422 is shaken, which enhances the sliding effect of the metal chips, thereby improving the fluidity of the metal chips on the inclined plate 422 and accelerating the discharge of the metal chips into the receiving box 41. The portion of the inclined plate 422 close to the vertical plate 421 can also be provided with a feed port 422b for passing the metal chips to prevent the metal chips from flowing to the vertical plate 421.

[0044] Continue to refer Figure 1 and Figure 2 , the metal chips can only rely on gravity to separate from the primary screening member 32, which may not be clean. In order to improve the separation effect of the metal chips and the primary screening member 32, the cleaning mechanism includes a cleaning member 51 and a linear drive member 52. The cleaning member 51 is slidably assembled on the workbench 11 and is used to scrape the metal wire strips on the workbench 11 to the feed port 12 when sliding. The linear drive member 52 is installed on the machine tool body 1 and is used to drive the cleaning member 51 to slide. In this embodiment, the cleaning member 51 can be a brush or a sponge, and the linear drive member 52 includes but is not limited to a threaded mechanism, an electric slide rail or a telescopic cylinder.

[0045] After the metal wire enters the feed port 12, it can directly fall on the upward back side 322 of the primary screening member 32. Under the action of the impact force and the elastic force of the centering spring 33, the primary screening member 32 vibrates, and the vibration intensifies the separation of metal chips from the front side 321 of the primary screening member 32, making the separation cleaner and more thorough.

[0046] Continue to refer Figure 2 and Figure 3When the metal wire strips fall on the back side 322 of the primary screening member 32, the cutting fluid carried by the wire strips easily flows down through the sieve holes of the primary screening member 32, and is recovered by the material collection box 41 together with the metal chips, thus causing a waste of cutting fluid. To solve this problem, the primary screening member 32 includes a double-layer sieve plate 323, and a sandwich is formed between the double-layer sieve plates 323. A blocking member 324 with a liquid passage hole 324a is slidably mounted in the sandwich. There are multiple liquid passage holes 324a that match the sieve holes of the double-layer sieve plate 323. One end of the blocking member 324 is connected to the primary screening member 32 through a reset spring, and the other end protrudes out of the sandwich. Under normal conditions, the liquid passage hole 324a and the sieve hole of the double-layer sieve plate 323 are connected to allow the cutting fluid to pass through. At this time, the liquid passage hole 324a and the sieve hole both play a role in screening metal chips and cutting fluid. When the primary screening element 32 flips half a circle, the other end of the blocking element 324 is squeezed by the wall of the inner cavity and retracts into the interlayer, and the liquid hole 324a and the sieve hole are misaligned. Thus, the blocking element 324 seals the primary screening element 32, avoiding the waste caused by the cutting fluid on the metal wire passing through the primary screening element 32.

[0047] Continue to refer Figure 2 and Figure 4 In order to separate the metal wire strips from the carried cutting fluid, the screening mechanism also includes a secondary screening member 35, which is located below the primary screening member 32. After the metal chips are recovered, the rotary motor 34 controls the primary screening member 32 to reset, that is, to reverse half a circle. At this time, the back side 322 of the primary screening member 32 begins to turn downward, and the metal wire strips piled on the back side 322 of the primary screening member 32 are thrown outward. The secondary screening member 35 is used to receive the thrown metal wire strips. The secondary screening member 35 is assembled in the inner cavity by sliding left and right and is driven to slide back and forth by the power member 36. During the reciprocating sliding, the secondary screening member 35 accelerates the separation of the metal wire strips and the cutting fluid.

[0048] In this embodiment, the rescreening member 35 can be a screening plate, a screening frame, etc., and the power member 36 can be a gear drive mechanism, a reciprocating screw mechanism, etc. Taking the gear drive mechanism as an example, it includes a rack 361, an incomplete gear 362 and a power motor 363. A frame structure is fixed on the rescreening member 35. The racks 361 are arranged in two vertical intervals and are both formed in the frame structure. The incomplete gear 362 is rotatably mounted on the inner wall of the machine tool body 1 and clamped between the two racks 361. The power motor 363 is mounted on the machine tool body 1 and is used to drive the incomplete gear 362 to rotate. When the incomplete gear 362 rotates, it can mesh with the upper and lower racks 361 in turn, thereby driving the rescreening member 35 to slide back and forth.

[0049] Continue to refer Figure 2 and Figure 4In order to realize the self-cleaning of the metal wire strips after screening, the stop mechanism includes a lifting platform 61 and a stopper 63. The lifting platform 61 is placed above the secondary screening element 35 and on the right side of the primary screening element 32. The lifting platform 61 is slidably assembled in the inner cavity and driven by the driving element 62 to move up and down. There are multiple stoppers 63 and they are evenly arranged below the lifting platform 61.

[0050] In this embodiment, the stopper 63 may be a vertical stopper bar, a stopper bar, etc., and the driving member 62 may be a cam 621 mechanism, an electric push rod, a hydraulic mechanism, etc. Taking the cam 621 mechanism as an example, it includes a cam 621 and a driving motor 622. The cam 621 is located below the lifting platform 61 and is rotatably mounted on the inner wall of the machine tool body 1. The lifting platform 61 is pressed against the outer peripheral surface of the cam 621. The driving motor 622 is mounted on the machine tool body 1 and is used to drive the cam 621 to rotate. When the cam 621 rotates, the lifting or falling of the lifting platform 61 can be controlled, thereby achieving lifting.

[0051] When the re-screening member 35 slides close to the lifting platform 61, that is, when it slides to the right, the driving member 62 can control the stopper 63 to be lifted through the lifting platform 61 to avoid the rightward movement of the metal wire strip on the re-screening member 35. When the re-screening member 35 moves away from the lifting platform 61, that is, when it is reset to the left, the driving member 62 can control the stopper 63 to fall through the lifting platform 61 to block the reset of the metal wire strip on the re-screening member 35. In this way, each time the re-screening member 35 slides back and forth, the metal wire strip steps a distance to the right until the metal wire strip moves out of the re-screening member 35 to the right, thereby avoiding manual cleaning of the screened metal wire strip on the re-screening member 35, saving time and effort. The metal wire strip moves out of the re-screening member 35 in a stepping manner, prolonging its retention time on the re-screening member 35, and ensuring its full screening with the cutting fluid. In order to collect the metal wire strips, the inner cavity is further formed with a return bin 13 located at the lower right side of the re-screening element 35. The metal wire strips removed from the re-screening element 35 can fall into the return bin 13 to achieve centralized collection.

[0052] Continue to refer Figure 2 and Figure 4 Since the metal wire strips are directly scraped off by the cleaning member 51, the metal wire strips tend to be close to each other or even aggregated into a mass. When the re-screening member 35 relies on the reciprocating action to screen the metal wire strips, the cutting fluid on the surface of the metal wire strips is easier to be screened out, while the cutting fluid in the inner layer or the center of the metal wire strips is not easy to be screened out because it is buried deeper. In order to ensure the sufficient screening of the cutting fluid and the metal wire strips, the shifting mechanism also includes a plurality of return members 64 evenly arranged on the re-screening member 35. The plurality of return members 64 and the plurality of shifting members 63 are staggered with each other. The return members 64 in this embodiment can be a lever, a shifting bar, etc. The return member 64 is used to shift the metal wire strips at the shifting member 63 back, that is, shift it to the left, when the re-screening member 35 is reset to the left, so that the metal wire strips are extended, so that the inner layer and the center part of the metal wire strips can be exposed, which is convenient for the screening of this part of the cutting fluid.

[0053] Continue to refer Figure 2 , Figure 4 and Figure 5 In order to prevent the return member 64 from returning the metal wire to its original position, the return member 64 is vertically slidably penetrated on the re-screening member 35, and the return members 64 are connected by a connecting frame 65 located below the re-screening member 35. Specifically, the connecting frame 65 includes connecting strips 651 and transverse plates 652. The number of connecting strips 651 is equal to the number of columns of the return members 64. Each connecting strip 651 is connected to a column of return members 64. The transverse plates 652 extend in the left-right direction and connect the connecting strips 651. Such a configuration facilitates the control of the unified movement of each return member 64 through the connecting frame 65, and the separate design of multiple connecting strips 651 allows the cutting fluid to flow smoothly, avoiding blockage of the cutting fluid passing through the re-screening member 35. In other embodiments, the connecting frame 65 can also be a hollow plate structure, which connects the various return members 64 together, and the hollow design facilitates the flow of cutting fluid through the re-screening member 35.

[0054] The inner wall of the machine tool body 1 is fixed with a support plate 66 located below the connecting frame 65, and the support plate 66 is connected to a push plate 67 located above it through a push spring 661. The push plate 67 is vertically slidably assembled on the inner wall of the machine tool body 1. Under the elastic force of the push spring 661, the push plate 67 pushes from bottom to top on the transverse plate 652. In addition, the push plate 67 and the transverse plate 652 can also be slidably assembled together in the left-right direction.

[0055] A transmission assembly is also provided between the push plate 67 and the primary screening member 32, and the transmission assembly includes a trapezoidal plate 325 and a convex tooth 653. The trapezoidal plate 325 is fixedly provided on the primary screening member 32, and a platform is fixedly provided on the left side of the transverse plate 652, and the convex tooth 653 is formed on the platform. When the secondary screening member 35 slides to the right, the connecting frame 65 is driven to move rightward by the stopper 63, and the convex tooth 653 is pressed into the bottom surface of the trapezoidal plate 325 through the left bevel of the trapezoidal plate 325, and the return member 64 moves downward with the convex tooth 653 until it is hidden in the secondary screening member 35, so as to avoid the return member 64 from interfering with the metal wire when it is thrown on the secondary screening member 35. When the convex tooth 653 passes over the trapezoidal plate 325, the convex tooth 653 and the return member 64 are reset upward under the action of the push spring 661, and then the secondary screening member 35 moves rightward to the set position. After that, the re-screening member 35 is reset to the left, and the stopper 63 falls down at the same time. The return member 64 cooperates with the stopper 63 to realize the leftward movement of the metal wire strip. After a certain distance of movement, the convex tooth 653 is pressed into the bottom surface of the trapezoidal plate 325 through the right bevel of the trapezoidal plate 325, thereby driving the connecting frame 65 to move downward, and then the return member 64 is hidden in the re-screening member 35, so that the return member 64 is separated from the metal wire strip to avoid the metal wire strip being moved to the original position, so as to ensure that the metal wire strip can be transported to the right for a certain distance while being moved away, and the metal wire strip is kept in the state of stepping to the right, thereby realizing the automatic cleaning of the metal wire strip. It can be understood that the elasticity of the push spring 661 is greater than the elasticity of the centering spring 33.

[0056] In other embodiments, the transmission assembly may also adopt a hydraulic telescopic mechanism, an electric telescopic mechanism, etc. installed on the chassis body to control the up and down movement of the connecting frame 65, and hide the return member 64 by introducing external equipment.

[0057] 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", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cooling device for a numerically controlled machine tool, comprising a machine tool body (1) and a cutting mechanism disposed in an inner cavity of the machine tool body (1), wherein the inner cavity of the machine tool body (1) has a workbench (11) for carrying a workpiece, and the cutting mechanism comprises a cutting tool (21) disposed above the workbench (11) and used for cutting the workpiece, and a spray head (22) adjacent to the cutting tool (21) and used for spraying a cutting fluid, wherein: The side space of the workbench (11) forms a material passing port (12), and the workbench (11) is inclined toward the material passing port (12) so that the cutting fluid can bring the metal chips into the material passing port (12). The workbench (11) also includes a screening mechanism, a cleaning mechanism, and a material guiding mechanism. The screening mechanism is located directly below the feeding port (12), and comprises a rotating member (31), a primary screening member (32) and an elastic member. The rotating member (31) is rotatably mounted in the inner cavity and driven by a rotating device. The primary screening member (32) is slidably mounted on the rotating member (31) and is used to receive metal chips falling from the feeding port (12). The front face (321) of the primary screening member (32) is used to receive metal chips falling from the feeding port (12). The metal chips are retained on the front face (321). The rotating device drives the rotating member (31) to flip half a circle. The rotating member (31) drives the primary screening member (32) to flip half a circle. The front face (321) and the back face (322) of the primary screening member (32) are swapped. The metal chips remaining on the front face (321) fall down under the action of gravity, thereby reducing the blockage of the primary screening member (32). The elastic member connects the rotating member (31) and the primary screening member (32), and the elastic member includes two centering springs (33) disposed opposite to each other at upper and lower sides of the primary screening member (32), each centering spring (33) being located in the slide groove and connecting the primary screening member (32) and the rotating member (31); The cleaning mechanism comprises a cleaning member (51) which can slide left and right on the workbench (11), and a linear driving member (52) which is installed on the machine tool body (1) and drives the cleaning member (51) to slide. The cleaning member (51) is used to scrape the metal wire strips on the workbench (11) to the feeding port (12) when sliding. After the metal wire strips enter the feeding port (12), they directly fall on the upward back side (322) of the primary screening member (32). Under the action of the impact force and the elastic force of the centering spring (33), the primary screening member (32) vibrates, and the vibration intensifies the separation of metal chips from the front side (321) of the primary screening member (32). The primary screening element (32) comprises a double-layer sieve plate (323), a sandwich is formed between the double-layer sieve plates (323), a blocking element (324) having a liquid through hole (324a) is slidably mounted in the sandwich, one end of the blocking element (324) is elastically connected to the primary screening element (32), and the other end protrudes outside the sandwich; under normal conditions, the liquid through hole (324a) and the sieve hole of the double-layer sieve plate (323) are connected to each other for passing cutting fluid; when the primary screening element (32) turns over half a circle, the other end of the blocking element (324) is squeezed by the cavity wall of the inner cavity and retracts into the sandwich, and the liquid through hole (324a) and the sieve hole are misaligned; the blocking element (324) blocks the primary screening element (32) and prevents the cutting fluid on the metal wire from passing through the primary screening element (32); The material guide mechanism is arranged below the primary screening member (32) and is used to guide metal chips outward; the material guide mechanism comprises a material receiving box (41) fixedly arranged outside the machine tool body (1), a material guide plate (42) slidable left and right in the material receiving box (41), and a linear drive member (43) installed on the material receiving box (41) and driving the material guide plate (42) to slide; the machine tool body (1) is provided with an opening connecting the inner cavity and the material receiving box (41) and allowing the material guide plate (42) to pass through; after the material guide plate (42) enters the inner cavity, it is used to receive metal chips dropped when the primary screening member (32) is turned over, and guide them into the material receiving box (41).

2. The cooling device for a CNC machine tool according to claim 1, characterized in that: The screening mechanism further comprises a secondary screening member (35), the secondary screening member (35) being located below the primary screening member (32) and being used to receive the metal wire strips thrown out when the primary screening member (32) is reset, the secondary screening member (35) being slidably mounted in the inner cavity and driven to slide back and forth by a power member (36) so as to separate the metal wire strips from the cutting fluid.

3. The cooling device for a numerically controlled machine tool according to claim 2, characterized in that: The CNC machine tool cooling device also includes a shifting mechanism, which includes a lifting platform (61) arranged above the re-screening component (35) and a plurality of shifting components (63) arranged on the lifting platform (61). The lifting platform (61) is slidably assembled in the inner cavity and is driven to move up and down by a driving component (62). When the re-screening component (35) slides close to the lifting platform (61), the shifting component (63) is lifted to avoid the metal wire strips on the re-screening component (35). When the re-screening component (35) moves away from the lifting platform (61), the shifting component (63) falls to block the metal wire strips on the re-screening component (35).

4. The cooling device for a numerically controlled machine tool according to claim 3, characterized in that: The shifting mechanism further comprises a plurality of return members (64) arranged on the re-screening member (35), wherein the return members (64) are used to shift the metal wire strip at the shifting member (63) back when the re-screening member (35) is away from the lifting platform (61).

5. The cooling device for a numerically controlled machine tool according to claim 4, characterized in that: The return member (64) is vertically slidably inserted into the re-screening member (35), and the return members (64) are connected to each other via a connecting frame (65) located below the re-screening member (35). A push plate (67) is elastically slidably connected to the machine tool body (1), and the push plate (67) pushes the connecting frame (65) from bottom to top. A transmission component is also provided between the connecting frame (65) and the primary screening member (32), and is used to control the connecting frame (65) to move downward when the re-screening member (35) is away from the lifting platform (61), so that the return member (64) is hidden in the re-screening member (35).

6. The cooling device for a numerically controlled machine tool according to claim 5, characterized in that: The transmission assembly comprises a trapezoidal plate (325) fixed on the primary screening member (32) and a convex tooth (653) formed on the connecting frame (65); when the secondary screening member (35) slides close to the lifting platform (61), the convex tooth (653) can pass over the trapezoidal plate (325) through the oblique edge on one side of the trapezoidal plate (325); when the secondary screening member (35) moves away from the lifting platform (61), the convex tooth (653) can press into the bottom surface of the trapezoidal plate (325) through the oblique edge on the other side of the trapezoidal plate (325), thereby driving the connecting frame (65) to move downward.

7. The cooling device for a numerically controlled machine tool according to claim 1, characterized in that: The material guide plate (42) comprises a vertical plate (421) slidably mounted in the material receiving box (41) and an inclined plate (422) hinged on the vertical plate (421), with both sides of the inclined plate (422) forming retaining edges (422a) for preventing metal debris from overflowing; the machine tool body (1) is elastically slidably connected to a push piece (44) extending into the opening, and the push piece (44) abuts against the inclined plate (422).

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