A clamping device for a numerically controlled machine tool with a protection function

Abstract

The present invention discloses a clamping device for a numerically controlled machine tool with a protection function, which includes a numerically controlled machine tool and an intelligent clamping system. The numerically controlled machine tool includes a machine body, and a sliding cylinder is fixedly installed on the inner wall of the machine body. A bracket is fixedly installed at the rear side of the sliding cylinder, and a hydraulic pump and a suction and pressure pump are fixedly installed in the middle of the bracket. The suction and pressure pump is connected to an external lubricant pipeline. An installation sleeve is fixedly installed below the bracket, and a pressure pump is connected by a bearing in the middle of the installation sleeve. A protection mechanism is fixedly connected to the right side of the pressure pump. A clamping sleeve is connected by a pipeline below the pressure pump, and a tool is slidably connected to the inner wall of the clamping sleeve. A plurality of clamping mechanisms are fixedly installed on the inner wall of the clamping sleeve, and an amplitude induction module is arranged inside the clamping sleeve. The clamping mechanisms are respectively connected to the hydraulic pump and the suction and pressure pump by pipelines. This device solves the problem that the current clamping work cannot be intelligently operated according to the vibration frequency of the tool.

Description

Technical Field

[0001] The present invention belongs to the technical field of machine tool clamping, and particularly relates to a clamping device for a numerical control machine tool with a protection function. Background Art

[0002] A numerical control machine tool is an automated machine tool equipped with a program control system. This control system can logically process a program with control codes or other symbolic instructions, decode it, represent it in coded numbers, and input it into the numerical control device through an information carrier. With the continuous advancement of machine tool clamping technology, more and more clamping devices used in numerical control machine tools cannot fully fix the cutting tool, resulting in continuous vibration or shaking of the cutting tool during the machining process, which affects the machining quality.

[0003] When the existing clamping device clamps the cutting tool, it cannot make the clamping process intelligent according to the vibration amplitude of the cutting tool, resulting in the clamped cutting tool still being in a shaking state. Moreover, it cannot lubricate the fitting part between the cutting tool and the collet. Lubrication can, on the one hand, prevent the cutting tool from rusting, and on the other hand, reduce the damage suffered by the cutting tool, provide full protection for the cutting tool, and further improve the machining quality. This phenomenon has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a clamping device for a numerical control machine tool with a protection function for the existing logging device, so as to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A clamping device for a numerical control machine tool with a protection function, including a numerical control machine tool and an intelligent clamping system, characterized in that: the numerical control machine tool includes a fuselage, a sliding cylinder is fixedly installed on the inner wall of the fuselage, a bracket is fixedly installed behind the sliding cylinder, a hydraulic pump and a suction and pressure pump are fixedly installed in the middle of the bracket, the suction and pressure pump is connected to an external lubricant pipeline, a placement sleeve is fixedly installed below the bracket, a pressure pump is connected by a bearing in the middle of the placement sleeve, a protection mechanism is fixedly connected to the right side of the pressure pump, a collet is connected by a pipeline below the pressure pump, a cutting tool is slidably connected to the inner wall of the collet, a plurality of clamping mechanisms are fixedly installed on the inner wall of the collet, a vibration amplitude induction module is arranged inside the collet, the clamping mechanisms are respectively connected to the hydraulic pump and the suction and pressure pump by pipelines, and the vibration amplitude induction module is used to sense the amplitude of vibration of the cutting tool inside the collet during the machining process.

[0006] The present invention further illustrates that the clamping mechanism includes a fixed block. On the left and right sides of the inner wall of the fixed block, arc-shaped blocks are slidably connected. Inside the arc-shaped blocks, sliding rods are fixedly connected. On the right end of the sliding rod, a sliding piece is fixed. The upper and lower ends of the sliding piece are slidably connected to a hydraulic cavity. The hydraulic cavities are connected to a hydraulic pump through pipelines, and control valves are arranged in the pipelines. Between the two fixed blocks, an embedded block is slidably connected. A sphere is fixedly installed on the outer end of the embedded block, and the inner end is arc-shaped. An arc-shaped groove is formed on the outer surface of the tool corresponding to the inner arc-shaped part of the embedded block. Inside the fixed block, a pressure cavity is fixedly installed. On the left and right sides of the inner wall of the pressure cavity, sliding plugs are slidably connected. Springs are connected between adjacent sliding plugs. The sliding plugs are connected to the outer ends of the sliding rods by steel ropes. Air outlet holes are formed at the left and right ends of the pressure cavity. A pressure valve is connected to the lower part of the pressure cavity through a pipeline. The pressure valve is connected to a suction and pressure pump through a pipeline. A discharge cavity is slidably connected below the pressure valve, and a number of small holes are formed on the surface of the discharge cavity.

[0007] The present invention further illustrates that the intelligent clamping system includes a data acquisition module, an intelligent conversion module, and an intelligent control module. The data acquisition module is electrically connected to the amplitude induction module. The intelligent conversion module is electrically connected to the data acquisition module and the intelligent control module respectively. The intelligent control module is electrically connected to the hydraulic pump, the suction and pressure pump, and the control valve respectively;

[0008] The data acquisition module is used to collect data on the high and low amplitudes of the tool vibration in the amplitude induction module. The intelligent conversion module is used to perform conversion based on the high and low amplitudes of the tool vibration and input the result into the intelligent control module. The intelligent control module is used to control the operation of the hydraulic pump, the suction and pressure pump, and the control valve.

[0009] The present invention further illustrates that the operation process of the intelligent clamping system includes:

[0010] S1. The intelligent clamping system operates and the processing starts;

[0011] S2. The amplitude induction module is controlled to operate through electric drive, and the amplitude induction module detects the high and low amplitudes of the tool vibration during the processing;

[0012] S3. The data acquisition module collects data on the high and low amplitudes of the tool vibration during the numerical control machine tool processing and inputs it into the intelligent conversion module. The intelligent conversion module calculates the result and inputs it into the intelligent control module;

[0013] S4. The intelligent control module drives the hydraulic pump to operate, and at the same time drives the state of the control valve to change. Then, it drives the displacement of the hydraulic pump to change to reinforce the tool. If the amplitude of the tool vibration is high, it enters S5; otherwise, it enters S6;

[0014] S5. When the pressure valve reaches the pressure bearing limit and opens, the electric drive then controls the operation of the suction and pressure pump. The suction and pressure pump discharges lubricant to further protect the tool, and then it enters S6;

[0015] S6. After the machining is completed, the intelligent clamping system is turned off. If further machining is required, repeat S1 to S5.

[0016] The present invention further explains that in S4, the intelligent control module controls the operation of the hydraulic pump. The hydraulic pump injects liquid into the hydraulic cavity through a control valve. After the liquid enters the hydraulic cavity, it pushes the sliding rod to move outward. The sliding rod pushes the arc-shaped block to move outward. After the outer end of the arc-shaped block contacts the sphere at the outer end of the embedded block, it squeezes the embedded block to move downward until the lower end fits with the arc-shaped groove on the outer surface of the tool. According to the vibration amplitude of the tool, the hydraulic pump changes the liquid displacement in the hydraulic cavity, thereby controlling the strengthening intensity.

[0017] The present invention further explains that in S4, the intelligent control module drives the operating state of the control valve to change. Adjacent hydraulic cavities use the same pipeline, and four hydraulic cavities with opposite positions on the inner wall of the jacket are connected to the same control valve. Thus, each time the embedded block at the object position extends, according to the vibration amplitude of the tool, the number of control valves opened changes, and the number of extended embedded blocks changes, further controlling the intensity of strengthening the tool.

[0018] The present invention further explains that in S5, when the vibration amplitude of the tool is high, a large number of arc-shaped blocks extend, and the pressure valve is controlled to open.

[0019] The present invention further explains that in S5, the intelligent control module controls the operation of the suction and pressure pump through electric drive. The suction and pressure pump injects lubricant into the pressure cavity. After the pressure valve opens, the lubricant enters the discharge cavity through the pipeline and finally discharges from the small holes in the discharge cavity, injecting lubricant between the tool and the jacket, and changing the displacement of the lubricant according to the vibration amplitude of the tool.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention adopts an intelligent clamping system and a vibration sensing module, and controls the operation modes of the hydraulic pump and the extraction pump according to the vibration amplitude of the tool, thereby performing real-time intelligent protection work on the tool. Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the schematic diagram of the internal mechanism of the fuselage of the present invention;

[0024] Figure 3 is a schematic structural view of the clamping part of the present invention;

[0025] Figure 4 is a schematic structural view of the jacket of the present invention;

[0026] Figure 5 is a schematic view of the connection mode of the hydraulic cavity pipeline of the present invention;

[0027] Figure 6 is a schematic plan view of the internal structure of the fixing block of the present invention;

[0028] Figure 7 is a schematic flow view of the intelligent clamping system of the present invention;

[0029] In the figure: 1, fuselage; 2, sliding cylinder; 3, bracket; 4, hydraulic pump; 5, suction and pressure pump; 6, placement sleeve; 7, pressure pump; 8, jacket; 9, cutter; 10, fixing block; 11, arc block; 12, sliding rod; 13, hydraulic cavity; 14, pressure cavity; 15, sliding plug; 16, pressure valve; 17, discharge cavity; 18, embedding block. Specific embodiments

[0030] The technical solution of the present invention will be further described in detail and non - restrictively below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-7, the present invention provides a technical solution: a clamping device for a numerically controlled machine tool with a protection function, including a numerically controlled machine tool and an intelligent clamping system. The numerically controlled machine tool includes a machine body 1, a sliding cylinder 2 is fixedly installed on the inner wall of the machine body, a bracket 3 is fixedly installed at the rear of the sliding cylinder 2, a hydraulic pump 4 and a suction and pressure pump 5 are fixedly installed in the middle of the bracket 3. The suction and pressure pump 5 is connected to an external lubricant pipeline. A placement sleeve 6 is fixedly installed below the bracket 3. A pressure pump 7 is connected by a bearing in the middle of the placement sleeve 6. A protection mechanism is fixedly connected to the right side of the pressure pump 7. A clamping sleeve 8 is connected by a pipeline below the pressure pump 7. A tool 9 is slidably connected to the inner wall of the clamping sleeve 8. A plurality of clamping mechanisms are fixedly installed on the inner wall of the clamping sleeve 8. An amplitude induction module is arranged inside the clamping sleeve 8. The clamping mechanisms are respectively connected to the hydraulic pump 4 and the suction and pressure pump 5 by pipelines. The amplitude induction module is used to sense the amplitude of the vibration of the tool 9 inside the clamping sleeve 8 during the machining process. The intelligent clamping system is electrically connected to the numerically controlled machine tool, the sliding cylinder 2, the hydraulic pump 4, the suction and pressure pump 5, the pressure pump 7, and the amplitude induction module respectively. When the numerically controlled machine tool is turned on and the intelligent clamping system runs, after the operator places the workpiece, the tool 9 is inserted into the clamping sleeve 8. The intelligent clamping system drives the pressure pump 7 to run through electric drive. The pressure pump 7 extracts gas from the clamping sleeve 8, so that the tool 9 is sucked by the clamping sleeve 8, thereby fixing the tool 9. Then the intelligent clamping system drives the sliding cylinder 2 to run. The sliding cylinder 2 drives the bracket 3 to move, thereby driving the placement sleeve 6 to move. The placement sleeve 6 drives the pressure pump 7 to move, so that the clamping sleeve 8 drives the tool 9 to perform a feeding operation. At the same time, the protection mechanism protects the tool 9. During the machining process, the tool 9 contacts the workpiece and generates vibration. The intelligent clamping system senses the vibration amplitude of the tool 9 through electric drive control of the amplitude induction module, and at the same time controls the hydraulic pump 4 and the suction and pressure pump 5 to run through electric drive, injects liquid and lubricant into the clamping mechanism, and controls the operation modes of the hydraulic pump 4 and the extraction pump 5 according to the vibration amplitude of the tool 9, so as to perform real-time intelligent protection work on the tool 9;

[0032] The clamping mechanism includes a fixed block 10. On the left and right sides of the inner wall of the fixed block 10, there are slidingly connected arc-shaped blocks 11. On the inner sides of the arc-shaped blocks 11, there are fixedly connected sliding rods 12. At the right end of the sliding rod 12, there is a sliding piece. The upper and lower ends of the sliding piece are slidingly connected to a hydraulic cavity 13. The hydraulic cavities 13 are all connected to a hydraulic pump 4 through pipelines, and control valves are arranged in the pipelines. Between the two fixed blocks 10, there is a slidingly connected embedded block 18. The outer end of the embedded block 18 is fixedly installed with a sphere and the inner end is arc-shaped. On the outer surface of the tool 9, an arc-shaped groove is opened corresponding to the inner arc-shaped part of the embedded block 18. Inside the fixed block 10, there is a fixedly installed pressure cavity 14. On the left and right sides of the inner wall of the pressure cavity 14, there are slidingly connected sliding plugs 15. The adjacent sliding plugs 15 are connected by a spring. The sliding plugs 15 are connected to the outer ends of the sliding rods 12 by steel ropes. On the left and right ends of the pressure cavity 14, there are air outlet holes. The pressure cavity 14 is connected to a pressure valve 16 through a pipeline. The pressure valve 16 is connected to a suction and pressure pump 5 through a pipeline. Below the pressure valve 16, there is a slidingly connected discharge cavity 17, and several small holes are opened on the surface of the discharge cavity 17. The intelligent clamping system is electrically connected to the control valve. Through the above steps, the hydraulic pump 4 operates. The hydraulic pump 4 injects liquid into the hydraulic cavity 13 through the control valve. After the liquid enters the hydraulic cavity 13, it pushes the sliding rod 12 to move outward. The sliding rod 12 pushes the arc-shaped block 11 to move outward. After the outer end of the arc-shaped block 11 contacts the sphere at the outer end of the embedded block 18, it squeezes the embedded block 18 to move downward until the lower end fits with the arc-shaped groove on the outer surface of the tool 9, further strengthening the tool 9. The adjacent hydraulic cavities 13 use the same pipeline. The four hydraulic cavities 13 at the relative positions on the inner wall of the clamping sleeve 8 are connected to the same control valve, so that the embedded block 18 at the relative position extends each time. According to the vibration amplitude of the tool 9, the number of control valves opened changes, and the number of extended embedded blocks 18 changes, controlling the strengthening strength of the tool 9. At the same time, the operation of the suction and pressure pump 5 is controlled by electric drive. The lubricant flows through the pipeline to the pressure valve 16. At this time, the pressure valve 16 is closed and the lubricant cannot pass through. When the vibration amplitude of the tool 9 is high, the number of extended arc-shaped blocks 11 is large. At this time, the adjacent sliding rods 12 all move outward, driving the sliding plugs 15 to move outward through the steel ropes, pulling the spring to deform. At this time, after the sliding plugs 15 move, the pressure in the middle of the pressure cavity 14 decreases until it reaches the limit pressure that the pressure valve 16 can bear, and the pressure valve 16 opens. After the pressure valve 16 is opened under pressure, at this time, the lubricant enters the pressure valve 16 through the pipeline, and finally is discharged into the discharge cavity 17, and then discharged from the small holes of the discharge cavity 17, injecting lubricant between the tool 9 and the clamping sleeve 8 to protect the tool 9;

[0033] The intelligent clamping system includes a data acquisition module, an intelligent conversion module, and an intelligent control module. The data acquisition module is electrically connected to the vibration amplitude sensing module. The intelligent conversion module is electrically connected to the data acquisition module and the intelligent control module respectively. The intelligent control module is electrically connected to the hydraulic pump 4, the suction and pressure pump 5, and the control valve respectively;

[0034] The data acquisition module is used to collect the data of the vibration amplitude of the tool 9 in the vibration amplitude sensing module. The intelligent conversion module is used to convert according to the vibration amplitude of the tool 9 and input the result into the intelligent control module. The intelligent control module is used to control the operation of the hydraulic pump 4, the suction and pressure pump 5, and the control valve;

[0035] The operation process of the intelligent clamping system includes:

[0036] S1. The intelligent clamping system runs and the machining starts;

[0037] S2. The vibration amplitude sensing module is controlled to run through electric drive, and the vibration amplitude sensing module detects the vibration amplitude of the tool 9 during the machining process;

[0038] S3. The data acquisition module collects the data of the vibration amplitude of the tool 9 during the machining process of the CNC machine tool and inputs it into the intelligent conversion module. The intelligent conversion module calculates the result and inputs it into the intelligent control module;

[0039] S4. The intelligent control module drives the hydraulic pump 4 to run, and at the same time drives the state of the control valve to change. Then it drives the displacement of the hydraulic pump 4 to change, so as to reinforce the tool 9. When the vibration amplitude of the tool 9 is high, it enters S5; otherwise, it enters S6;

[0040] S5. The pressure valve 16 opens when it reaches the pressure bearing limit. Then the suction and pressure pump 5 is controlled to run through electric drive. The suction and pressure pump 5 discharges the lubricant to further protect the tool 9. Then it enters S6;

[0041] S6. After the machining is completed, the intelligent clamping system is turned off. If continuous machining is required, repeat S1 to S5;

[0042] In S4, the intelligent control module controls the hydraulic pump 4 to run. The hydraulic pump 4 injects liquid into the hydraulic cavity 13 through the control valve. After the liquid enters the hydraulic cavity 13, it pushes the sliding rod 12 to move outward. The sliding rod 12 pushes the arc-shaped block 11 to move outward. After the outer end of the arc-shaped block 11 contacts the sphere at the outer end of the embedded block 18, it squeezes the embedded block 18 to move downward until the lower end fits with the arc-shaped groove on the outer surface of the tool 9. According to the vibration amplitude of the tool 9, the displacement of the liquid in the hydraulic cavity 13 by the hydraulic pump 4 is changed, so as to control the reinforcement strength. Z is the vibration amplitude of the tool 9:

[0043]

[0044] Among them, Q is the displacement of the liquid in the hydraulic cavity 13 by the hydraulic pump 4, Z max is the maximum vibration amplitude of the tool 9, Q maxis the maximum liquid displacement of the hydraulic pump 4 in the hydraulic chamber 13. The greater the vibration amplitude of the tool 9, the more the hydraulic pump 4 displaces the liquid in the hydraulic chamber 13, so that the strength of the fit between the lower end of the embedded block 18 and the arc groove on the outer surface of the tool 9 is greater, so that the embedded block 18 and the tool 9 are closer, so as to avoid the insufficient fixation of the tool 9 causing the tool 9 to shake and affect the accuracy during processing, and the tool 9 can be reinforced to avoid excessive wear of the cutter head after the tool 9 shakes, thereby improving the processing accuracy and ensuring the processing quality. The smaller the vibration amplitude of the tool 9, the less the hydraulic pump 4 displaces the liquid in the hydraulic chamber 13, so that the strength of the fit between the lower end of the embedded block 18 and the arc groove on the outer surface of the tool 9 is smaller, and the tool 9 vibrates less at this time, so there is no need for strong reinforcement strength, and the friction loss between the outer end of the embedded block 18 and the surface of the tool 9 is reduced;

[0045] In S4, the intelligent control module drives the control valve to change its operating state. Adjacent hydraulic chambers 13 use the same pipe. Four hydraulic chambers 13 at opposite positions on the inner wall of the jacket 8 are connected to the same control valve, so that the embedded blocks 18 at the relative positions are extended each time. The number of control valves opened changes according to the vibration amplitude of the tool 9, and the number of extended embedded blocks 18 changes, so as to further control the strength of the reinforced tool 9:

[0046] When Z mid <Z<Z max When Z mid The normal vibration amplitude of tool 9 is: R is the opening quantity of the control valve, R max is the total number of control valves, The purpose is to round the calculation result. The larger the vibration amplitude of the tool 9, the more the control valve is opened, the higher the reinforcement strength of the tool 9 is, the reinforcement strength of the tool 9 is further improved, and the unstable reinforcement of the tool 9 is avoided. The tool 9 is protected, and the processing accuracy is further improved to ensure the processing quality. The smaller the vibration amplitude of the tool 9, the fewer the control valve is opened, and the lower the reinforcement strength of the tool 9 is. On the one hand, it prevents the tool 9 from being excessively reinforced to cause surface wear, and prevents the gap between the tool 9 and the jacket 8 from increasing, which affects the strength of the pressure pump 7 to absorb the tool 9;

[0047] When Z≤Z mid When: R=1, a control valve is opened, so that the two opposite embedded blocks 18 are extended, which can ensure that they are reinforced to the tool 9. At this time, the vibration amplitude of the tool 9 is low, which reduces the wear of the embedded block 18, protects the embedded block 18, and reduces the loss as much as possible;

[0048] In S5, when the vibration amplitude of the tool 9 is high, the number of the extended arc-shaped blocks 11 is large, the control pressure valve 16 is opened. At this time, the adjacent sliding rods 12 all move outwards, and the sliding plug 15 is driven to move outwards through the steel rope. During the movement of the sliding plug 15, the gas at the outer end of the pressure chamber 14 is discharged. The sliding plugs 15 pull each other to deform the spring. At this time, the pressure in the middle of the pressure chamber 14 decreases after the sliding plug 15 moves. Until the pressure valve 16 reaches its pressure tolerance limit, the pressure valve 16 is opened. When the vibration frequency of the tool 9 is low, only a single sliding rod 12 moves outwards. At this time, the pressure in the middle of the pressure chamber 14 is not enough to open the pressure valve 16, so that it can control the subsequent lubricant discharge state. The higher the vibration frequency of the tool 9, the easier it is for the pressure valve 16 to open, which is convenient for subsequent lubricant discharge to protect the tool 9. And the lower the vibration frequency of the tool 9, the more difficult it is for the pressure valve 16 to open. At this time, the lubricant can be blocked to reduce the subsequent waste of lubricant and make the lubricant discharge work more intelligent;

[0049] In S5, the intelligent control module controls the operation of the suction and pressure pump 5 through electric drive. The suction and pressure pump 5 injects lubricant into the pressure chamber 14. After the pressure valve 16 is opened, the lubricant enters the discharge chamber 17 through the pipeline and is finally discharged from the small holes of the discharge chamber 17, injecting lubricant between the tool 9 and the collet 8. The displacement of the lubricant changes according to the vibration amplitude of the tool 9:

[0050] When Z mid <Z<Z max : F is the displacement of the lubricant, F max is the maximum displacement of the lubricant. For the larger the vibration amplitude of the tool 9, the more the displacement of the lubricant. At this time, to reduce the wear between the tool 9 and the inner wall of the collet 8, the lubricant discharge between the two gaps is increased to improve the lubrication effect, further protect the tool 9, and improve the service life of the tool 9. For the smaller the vibration amplitude of the tool 9, the less the displacement of the lubricant. At this time, the machining process of the tool 9 is stable, reducing the waste of lubricant, and at the same time providing a certain protection effect and improving the quality of the tool 9;

[0051] When Z≤Z mid : At this time, the vibration intensity of the tool 9 is not high, and there is no need to lubricate the tool 9, so that the suction and pressure pump 5 does not operate. On the one hand, it reduces the waste of lubricant, and on the other hand, it prevents the lubricant from solidifying in the pressure chamber 14 for a long time, avoiding the blockage of the pressure chamber 14 after the lubricant solidifies and making it impossible to discharge the lubricant smoothly when the vibration amplitude of the subsequent tool 9 becomes larger, ensuring the smooth operation of the device.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0053] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clamping device for a numerically controlled machine tool with a protection function, comprising a numerically controlled machine tool and an intelligent clamping system, Characterized in that: The numerically controlled machine tool includes a machine body (1), a sliding cylinder (2) is fixedly installed on the inner wall of the machine body, a bracket (3) is fixedly installed at the rear of the sliding cylinder (2), a hydraulic pump (4) and a suction and pressure pump (5) are fixedly installed in the middle of the bracket (3), the suction and pressure pump (5) is connected to an external lubricant pipeline, a placement sleeve (6) is fixedly installed below the bracket (3), a pressure pump (7) is connected by a bearing in the middle of the placement sleeve (6), a protection mechanism is fixedly connected to the right side of the pressure pump (7), a jacket (8) is connected by a pipeline below the pressure pump (7), a tool (9) is slidably connected to the inner wall of the jacket (8), a plurality of clamping mechanisms are fixedly installed on the inner wall of the jacket (8), and an amplitude induction module is arranged inside the jacket (8). The clamping mechanisms are respectively connected to the hydraulic pump (4) and the suction and pressure pump (5) by pipelines, and the amplitude induction module is used to sense the amplitude of the vibration of the tool (9) inside the jacket (8) during the machining process; The clamping mechanism includes a fixed block (10), arc-shaped blocks (11) are slidably connected to the left and right sides of the inner wall of the fixed block (10), sliding rods (12) are fixedly connected to the inner sides of the arc-shaped blocks (11), a sliding piece is fixed to the right end of the sliding rod (12), the upper and lower ends of the sliding piece are slidably connected to a hydraulic cavity (13), the hydraulic cavities (13) are respectively connected to the hydraulic pump (4) by pipelines and control valves are arranged in the pipelines. An embedding block (18) is slidably connected between the two fixed blocks (10), a sphere is fixedly installed at the outer end of the embedding block (18) and the inner end is arc-shaped. An arc-shaped groove is opened on the outer surface of the tool (9) corresponding to the inner arc-shaped part of the embedding block (18). A pressure cavity (14) is fixedly installed inside the fixed block (10), sliding plugs (15) are slidably connected to the left and right sides of the inner wall of the pressure cavity (14), adjacent sliding plugs (15) are connected by springs, the sliding plugs (15) are connected to the outer ends of the sliding rods (12) by steel ropes, air outlet holes are opened at the left and right ends of the pressure cavity (14), a pressure valve (16) is connected by a pipeline below the pressure cavity (14), the pressure valve (16) is connected to the suction and pressure pump (5) by a pipeline, and a discharge cavity (17) is slidably connected below the pressure valve (16) and a plurality of small holes are opened on the surface of the discharge cavity (17); The intelligent clamping system includes a data acquisition module, an intelligent conversion module, and an intelligent control module. The data acquisition module is electrically connected to the amplitude induction module, the intelligent conversion module is electrically connected to the data acquisition module and the intelligent control module respectively, and the intelligent control module is electrically connected to the hydraulic pump (4), the suction and pressure pump (5), and the control valve respectively; The data acquisition module is used to collect data on the amplitude of the vibration of the tool (9) in the amplitude induction module. The intelligent conversion module is used to perform conversion according to the amplitude of the vibration of the tool (9) and input the result into the intelligent control module. The intelligent control module is used to control the operation of the hydraulic pump (4), the suction and pressure pump (5), and the control valve.

2. A clamping device for a numerically controlled machine tool with a protection function according to claim 1, characterized in that: The operation process of the intelligent clamping system includes: S1. The intelligent clamping system operates and the machining starts; S2. The amplitude induction module is controlled to operate by electric drive, and the amplitude induction module detects the vibration amplitude of the tool (9) during the machining process; S3. The data acquisition module collects the data of the vibration amplitude of the tool (9) during the machining process of the numerically controlled machine tool and inputs it into the intelligent conversion module. The intelligent conversion module calculates the result and inputs it into the intelligent control module; S4. The intelligent control module drives the hydraulic pump (4) to operate, and at the same time drives the state of the control valve to change, and then drives the displacement of the hydraulic pump (4) to change, so as to reinforce the tool (9). When the vibration amplitude of the tool (9) is high, it enters S5, otherwise it enters S6; S5. When the pressure valve (16) reaches the pressure bearing limit and opens, the electric drive controls the operation of the suction pump (5), and the suction pump (5) discharges the lubricant to further protect the tool (9), and then enters S6; S6. After the machining is completed, the intelligent clamping system is turned off. If further machining is required, repeat S1 to S5.

3. A clamping device for a numerically controlled machine tool with a protection function according to claim 2, characterized in that: In S4, the intelligent control module controls the operation of the hydraulic pump (4). The hydraulic pump (4) injects liquid into the hydraulic cavity (13) through the control valve. After the liquid enters the hydraulic cavity (13), it pushes the sliding rod (12) to move outward. The sliding rod (12) pushes the arc-shaped block (11) to move outward. After the outer end of the arc-shaped block (11) contacts the sphere at the outer end of the embedded block (18), it squeezes the embedded block (18) to move downward until the lower end fits with the arc-shaped groove on the outer surface of the tool (9). According to the vibration amplitude of the tool (9), the displacement of the liquid in the hydraulic cavity (13) by the hydraulic pump (4) is changed, so as to control the reinforcement strength.

4. A clamping device for a numerically controlled machine tool with a protection function according to claim 3, characterized in that: In S4, the intelligent control module drives the operation state of the control valve to change. The adjacent hydraulic cavities (13) use the same pipeline, and the four hydraulic cavities (13) with opposite positions on the inner wall of the clamping sleeve (8) are connected to the same control valve, so that each time the embedded block (18) at the object position extends out, the number of control valves opened changes according to the vibration amplitude of the tool (9), and the number of extended embedded blocks (18) changes, further controlling the strength of reinforcing the tool (9).

5. A clamping device for a numerically controlled machine tool with a protection function according to claim 4, characterized in that: In S5, when the vibration amplitude of the tool (9) is high, the number of extended arc-shaped blocks (11) is large, and the pressure valve (16) is controlled to open.

6. A clamping device for a numerically controlled machine tool with a protection function according to claim 5, characterized in that: In the step S5, the intelligent control module controls the operation of the pumping and pressing pump (5) through electric drive. The pumping and pressing pump (5) injects lubricant into the pressure chamber (14). After the pressure valve (16) is opened, the lubricant enters the discharge chamber (17) through the pipeline and finally discharges from the small holes of the discharge chamber (17) to inject lubricant between the tool (9) and the collet (8), and the discharge amount of the lubricant is changed according to the vibration amplitude of the tool (9).

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