A large CNC machine tool based on spindle error warning correction

Abstract

This invention relates to the field of machine tool spindle adjustment and correction technology, specifically a large CNC machine tool based on spindle error early warning correction, comprising: a multi-directional displacement mechanism and a displacement detection module. The displacement detection module includes a PLC signal sensor, a displacement sensor, and an early warning sensor. The displacement sensor can detect the displacement of the multi-directional displacement mechanism and, after collecting the detection data, feeds it back to the PLC signal sensor so that an early warning is issued when abnormal displacement occurs. A torque control mechanism and an error detection module are provided on the spindle. The error detection module includes a pressure sensor and an adjustment controller. The pressure sensor detects the spindle yaw angle, and the adjustment controller releases an execution command to adjust the support arm of the spindle through the torque control mechanism. This application uses the error detection module to monitor the spindle in real time and actively adjust the torque and support force on the spindle, thereby achieving the effect of automatic spindle correction.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool spindle adjustment and correction, in particular to a large-scale numerically controlled machine tool based on spindle error early warning correction. Background Art

[0002] The main functions of the spindle include control, transmission, rotation and positioning, etc. It transmits power to the tool so that the tool can complete the processing operation. In addition, the spindle also has certain vibration resistance and wear resistance to ensure stability and durability at high speed operation.

[0003] The spindle is one of the important components of CNC machine tools, and its accuracy has a great impact on parts processing. Spindle errors are usually caused by bearing damage, poor lubrication or overly tight fit, or incorrect installation of the spindle positioning detection sensor, incorrect parameter settings of the spindle speed control unit, improper adjustment of the spindle stop circuit and other electrical problems that can also lead to inaccurate spindle positioning or jitter.

[0004] The existing spindle error correction adopts a multi-step error separation method to eliminate the eccentricity error of the standard ball installation, collects data through sensors and performs mathematical and statistical analysis to gradually eliminate various errors. However, when this control and adjustment method is implemented for error compensation, the spindle can only be corrected after multiple calculations for both data collection and adjustment control. This may lead to the problem of low part processing accuracy due to untimely spindle correction and adjustment. Summary of the invention

[0005] The purpose of the present invention is to provide a large-scale CNC machine tool based on spindle error early warning correction to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A large CNC machine tool based on spindle error early warning correction, comprising:

[0008] A machine tool body, and a receiving plate movably mounted in the machine tool body;

[0009] Also includes:

[0010] A multi-directional displacement mechanism is arranged in the machine tool body, a movable box is connected to the multi-directional displacement mechanism, and a driving box is rotatably mounted on the movable box;

[0011] A displacement detection module is arranged in the machine tool body, and the displacement detection module includes a PLC signal sensor, a displacement sensor, and an early warning sensor. The displacement sensor can detect the displacement of the multi-directional displacement mechanism, and collect the detection data and send it to the PLC signal sensor, so that the early warning sensor can perform early warning processing when abnormal displacement occurs;

[0012] A main shaft is rotatably mounted on the end of the driving box, the driving box is provided with a lifting mechanism, the lifting mechanism is connected to a rotating ring, and the main shaft is provided with a torque control mechanism connected to the lifting mechanism and the rotating ring;

[0013] An error detection module is arranged on the spindle, and the error detection module includes a pressure sensor and an adjustment controller. The pressure sensor is used to detect the spindle yaw angle, and the adjustment controller is used to release a command to the lifting mechanism, so as to adjust the support arm of the torque control mechanism on the spindle through the lifting mechanism;

[0014] The strength control component is arranged on the rotating ring and connected to the torque control mechanism. When the lifting mechanism moves, the strength control component can drive the rotating ring to rotate so as to adjust the supporting state of the torque control mechanism on the main shaft.

[0015] As a further solution of the present invention: the multi-directional displacement mechanism includes a first screw rod rotatably installed in the machine tool body, a first threaded sleeve that cooperates with the first screw rod thread is movably installed on the first screw rod, a movable frame is fixed on the first threaded sleeve, and a guide assembly connected to the movable frame is arranged in the machine tool body.

[0016] As a further solution of the present invention: the guide assembly includes a first guide rod fixedly installed in the machine tool body, a first guide sleeve is slidably installed on the first guide rod, the first guide sleeve is fixedly connected to the movable frame, and the movable frame is provided with a vertical translation structure connected to the movable box.

[0017] As a further solution of the present invention: the vertical translation structure includes a second screw rod rotatably mounted on the movable frame, a second threaded sleeve movably mounted on the second screw rod and cooperating with the thread of the second screw rod, a second guide rod is fixed on the movable frame, a second guide sleeve is slidably mounted on the second guide rod, and the second threaded sleeve and the second guide sleeve are fixedly connected to the movable box.

[0018] As a further solution of the present invention: the lifting mechanism includes a third screw rod rotatably mounted on the drive box, a third threaded sleeve movably mounted on the third screw rod and cooperating with the third screw rod thread, a support ring is fixed to the side wall of the third threaded sleeve, and a sliding assembly connected to the support ring is provided on the drive box.

[0019] As a further solution of the present invention: the sliding assembly includes a third guide rod fixedly mounted on the driving box, a third guide sleeve is slidably mounted on the third guide rod, and the third guide sleeve is fixedly connected to the support ring;

[0020] It also includes support rails which are respectively fixedly mounted on the side walls of the third threaded sleeve and the third guide sleeve, and a sliding block which is slidably connected to the support rails is fixed on the rotating ring.

[0021] As a further solution of the present invention: the torque control mechanism includes a limiting sleeve slidably mounted on the main shaft, a plurality of supporting sleeves equidistantly distributed around the circumference are fixed to the side wall of the limiting sleeve, the supporting sleeve passes through the supporting ring, and an elastic component connected to the rotating ring is arranged on the supporting sleeve.

[0022] As a further solution of the present invention: the elastic component includes a support rod slidably installed in the support sleeve, a limiting wheel is fixed at one end of the support rod away from the support sleeve, the limiting wheel abuts against the rotating ring, and a spring abuts against the support rod is fixed in the support sleeve.

[0023] As a further solution of the present invention: the strength control component includes an oblique groove provided on the rotating ring, a limiting column slidably connected to the oblique groove is fixed on the third guide rod, and a plurality of inclined blocks equidistantly distributed around the circumference are fixed on the rotating ring, and the inclined blocks are in abutment with the limiting wheel.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can automatically control the support strength of the main shaft according to the error generated by the main shaft, and adjust the support force arm of the main shaft to realize the correction of the main shaft error. If an error occurs in the main shaft, under the action of the error detection module, the situation can be detected in time, and the movement of the lifting mechanism can be controlled, thereby controlling the movement of the rotating ring and the torque control mechanism to increase the support force arm of the main shaft, thereby increasing the support force of the main shaft. The lifting mechanism can also drive the strength control component to move, so that the rotating ring rotates, so as to increase the radial support force of the torque control mechanism on the main shaft through the strength control component.

[0025] At the same time, when the multi-directional displacement mechanism moves, the displacement detection module can detect the movement amount of the multi-directional displacement mechanism to ensure that when the transmission is abnormal and causes displacement deviation, the situation can be warned in time and corresponding measures can be taken;

[0026] Through real-time monitoring of the spindle by the pressure sensor, when an error occurs in the spindle, the support arm of the spindle is actively adjusted and the radial support force is increased, so as to realize timely correction of the spindle and ensure machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a structural schematic diagram of an embodiment of a large CNC machine tool based on spindle error early warning correction.

[0028] Figure 2 The present invention is a schematic diagram of a partial cross-sectional structure of a machine tool body in an embodiment of a large-scale CNC machine tool based on spindle error warning correction.

[0029] Figure 3 The present invention is a schematic diagram of the connection relationship among a multi-directional displacement mechanism, a movable box, a drive box and a spindle in an embodiment of a large CNC machine tool based on spindle error warning correction.

[0030] Figure 4 The present invention is a structural schematic diagram of a multi-directional displacement mechanism in an embodiment of a large CNC machine tool based on spindle error warning correction.

[0031] Figure 5 The present invention is a schematic structural diagram of a spindle, a part of a lifting mechanism, and a part of a torque control mechanism in an embodiment of a large-scale CNC machine tool based on spindle error warning correction.

[0032] Figure 6 The present invention is a schematic diagram of the connection relationship among the lifting mechanism, the torque control mechanism and the strength control component in one embodiment of a large CNC machine tool based on spindle error warning correction.

[0033] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at point A in the middle.

[0034] Figure 8 The present invention is a schematic diagram of the exploded structure of a torque control mechanism and a support ring in an embodiment of a large CNC machine tool based on spindle error warning correction.

[0035] Fig. 9 It is a schematic diagram of a partial half-section structure of an embodiment of a large CNC machine tool based on spindle error warning correction.

[0036] Fig.10 The exploded structure diagram of part of the lifting mechanism and part of the strength control component in an embodiment of a large CNC machine tool based on spindle error warning correction is shown.

[0037] Fig.11 The exploded structural diagram of a part of the torque control mechanism in an embodiment of a large CNC machine tool based on spindle error warning correction is shown.

[0038] In the figure: 1, machine tool body; 2, receiving plate; 3, first screw rod; 4, first threaded sleeve; 5, first guide rod; 6, first guide sleeve; 7, movable frame; 8, second screw rod; 9, second threaded sleeve; 10, second guide rod; 11, second guide sleeve; 12, movable box; 13, drive box; 14, main shaft; 15, third screw rod; 16, third threaded sleeve; 17, supporting ring; 18, third guide rod; 19, third guide sleeve; 20, supporting guide rail; 21, rotating ring; 2101, inclined groove; 22, sliding block; 23, limiting column; 24, tilting block; 25, limiting sleeve; 26, supporting sleeve; 27, supporting rod; 28, limiting wheel; 29, spring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0041] See also Figure 1 to Figure 11 In an embodiment of the present invention, a large CNC machine tool based on spindle error warning correction includes:

[0042] A machine tool body 1, and a receiving plate 2 movably mounted in the machine tool body 1;

[0043] The receiving tray 2 is used to hold the parts to be processed, and the receiving tray 2 can slide in the machine tool body 1 and drive the parts to rotate for easy processing.

[0044] Also includes:

[0045] See also Figure 1-Figure 4, a multi-directional displacement mechanism is arranged in the machine tool body 1, and a movable box 12 is connected to the multi-directional displacement mechanism, and a driving box 13 is rotatably installed on the movable box 12; a displacement detection module is arranged in the machine tool body 1, and the displacement detection module includes a PLC signal sensor, a displacement sensor, and an early warning sensor. The displacement sensor can detect the displacement of the multi-directional displacement mechanism, and collect the detection data and send it to the PLC signal sensor, so that the early warning sensor can perform early warning processing when abnormal displacement occurs. The multi-directional displacement mechanism includes a first screw rod 3 rotatably installed in the machine tool body 1, and a first threaded sleeve 4 that is threadedly matched with the first screw rod 3 is movably installed on the first screw rod 3, and a movable frame 7 is fixed on the first threaded sleeve 4. The machine tool body 1 is provided with a guide assembly connected to the movable frame 7, wherein the guide assembly includes a first guide rod 5 fixedly installed in the machine tool body 1, a first guide sleeve 6 is slidably installed on the first guide rod 5, the first guide sleeve 6 is fixedly connected to the movable frame 7, and a vertical translation structure connected to the movable box 12 is provided on the movable frame 7. The vertical translation structure mentioned above includes a second screw rod 8 rotatably installed on the movable frame 7, a second threaded sleeve 9 threadably matched with the second screw rod 8 is movably installed on the second screw rod 8, a second guide rod 10 is fixed on the movable frame 7, a second guide sleeve 11 is slidably installed on the second guide rod 10, and the second threaded sleeve 9 and the second guide sleeve 11 are fixedly connected to the movable box 12.

[0046] In detail, when processing parts, due to the different required processing positions, it is necessary to adjust the position of the main shaft 14 in the vertical and horizontal directions. Therefore, when it is necessary to adjust the position of the main shaft 14 in the horizontal direction, the first screw rod 3 rotates, driving the first threaded sleeve 4 to move, thereby driving the movable frame 7 to move, and the movable frame 7 will also drive the first guide sleeve 6 to move along the length direction of the first guide rod 5. The first guide sleeve 6 and the first guide rod 5 have a guiding function, which can ensure that the movable frame 7 will not deviate during movement, thereby ensuring that the first threaded sleeve 4 will not rotate with the first screw rod 3 when it moves along the length direction of the first screw rod 3. When the movable frame 7 moves to the required position, the first screw rod 3 stops rotating. If it is necessary to adjust the spindle 14 in the horizontal direction, When the second screw rod 8 is in the vertical position, the second screw rod 8 rotates and drives the second threaded sleeve 9 to move, thereby driving the movable box 12 to move. The movable box 12 will also drive the second guide sleeve 11 to move along the length direction of the second guide rod 10. The second guide sleeve 11 and the second guide rod 10 have a guiding function. Therefore, the movable box 12 will not be offset during movement to ensure that the second threaded sleeve 9 will not rotate with the second screw rod 8 when it moves along the length direction of the second screw rod 8. When the movable box 12 moves to the desired position, the second screw rod 8 stops moving. The rotation of the first screw rod 3 and the second screw rod 8 can be controlled by the control panel to ensure that the main shaft 14 can move to the specified position. This is an application of the prior art and will not be elaborated in this application.

[0047] Preferably, a plurality of sensors are also provided in the machine tool body 1 for detecting the displacement of the movable box 12. If there is an error between the position of the movable box 12 and the set amount, an alarm can be automatically performed, thereby preventing the problem of the spindle 14 processing position being offset due to errors in the screw transmission. A motor is installed in the movable box 12 for adjusting the processing angle of the spindle 14 through the drive box 13. A motor is also installed in the drive box 13 for driving the spindle 14 to rotate so as to process the parts through the spindle 14.

[0048] Among them, a numerical control system is also installed on the machine tool. The numerical control system is used to process the input processing program. When the operator inputs the required execution instruction, the PLC signal sensor can receive the signal from the numerical control system and control the machine tool to perform various actions according to the signal, including the action execution of the multi-directional displacement mechanism. The displacement sensor can detect and process the movement of the multi-directional displacement mechanism in real time to ensure the accuracy of the transmission of the multi-directional displacement mechanism. At the same time, the displacement data can be collected and the collected data can be fed back to the PLC signal sensor. Then, the signal is sent to the early warning sensor through the PLC signal sensor. If the signal is abnormal, an alarm will be processed. At this time, the numerical control system will take corresponding measures, such as shutdown processing, or adjust the movement of the machine tool, so as to prevent abnormal operation and potential risks. The close cooperation between the PLC signal sensor and the numerical control system ensures the precise control and stable operation of the machine tool. The cooperation between the displacement sensor and the early warning sensor provides the machine tool with necessary safety protection and fault detection functions.

[0049] See also Figure 2 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , the main shaft 14 is rotatably mounted on the end of the driving box 13, the driving box 13 is provided with a lifting mechanism, and the lifting mechanism is connected with a rotating ring 21, the lifting mechanism includes a third screw rod 15 rotatably mounted on the driving box 13, and a third threaded sleeve 16 threadedly matched with the third screw rod 15 is movably mounted on the third screw rod 15, and a support ring 17 is fixed to the side wall of the third threaded sleeve 16, and a sliding assembly connected with the support ring 17 is provided on the driving box 13, wherein the sliding assembly includes a third guide rod 18 fixedly mounted on the driving box 13, and a third guide sleeve 19 is slidably mounted on the third guide rod 18, and the third guide sleeve 19 is fixedly connected to the support ring 17; it also includes support rails 20 respectively fixedly mounted on the side walls of the third threaded sleeve 16 and the third guide sleeve 19, and a sliding block 22 slidably connected with the support rail 20 is fixed on the rotating ring 21.

[0050] It should be noted that when the spindle 14 rotates, if the bearing itself has an error, or the bearing has been used for too long and has been worn too severely, or the fit between the spindle 14 and the bearing is too tight, it may cause an error in the rotation of the spindle 14. Therefore, it is necessary to increase the supporting force on the spindle 14 when the spindle 14 rotates to correct the spindle 14. In the initial state, under the action of the third screw rod 15, the support ring 17 is located at the end of the stroke in the direction of the drive box 13 to control the torque control mechanism to provide the minimum supporting force on the spindle 14. If there is no error in the spindle 14, the supporting force provided to the spindle 14 by the torque control mechanism is sufficient to ensure the normal use of the spindle 14. If an error occurs when the spindle 14 rotates, it is necessary to increase the supporting force on the spindle 14. At this time, the third screw rod 15 The rod 15 rotates and drives the third threaded sleeve 16 to move, thereby driving the third guide sleeve 19 to move along the length direction of the third guide rod 18 through the support ring 17. The third guide sleeve 19 and the third guide rod 18 have a guiding function to ensure that the support ring 17 will not deviate during movement, so as to ensure that the third threaded sleeve 16 moves along the length direction of the third screw rod 15 and does not rotate with the third screw rod 15. The support ring 17 will also drive the torque control mechanism to move to increase the supporting force arm for the main shaft 14, thereby increasing the supporting force for the main shaft 14. When the support ring 17 moves, it will also drive the support guide rail 20 to move. Under the action of the sliding block 22, the rotating ring 21 moves synchronously, thereby ensuring that the rotating ring 21 is always in a coordinated state with the torque control mechanism.

[0051] Preferably, since there are many reasons that affect the error of the spindle 14, electrical problems such as incorrect installation of the spindle 14 positioning detection sensor, incorrect parameter setting of the spindle 14 speed control unit, and improper adjustment of the spindle 14 stop circuit will also cause the spindle 14 to be inaccurately positioned or jitter. If the torque control mechanism is directly controlled by the support ring 17 to have a large force arm, the friction coefficient between it and the spindle 14 will increase, which may cause the spindle 14 to wear. Therefore, it is necessary to adjust the position of the support ring 17 under specific circumstances.

[0052] See also Figure 2 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.11The main shaft 14 is provided with a torque control mechanism connected to the lifting mechanism and the rotating ring 21. The main shaft 14 is provided with a torque control mechanism connected to the lifting mechanism and the rotating ring 21. The error detection module is arranged on the main shaft 14. The error detection module includes a pressure sensor and an adjustment controller. The pressure sensor is used to detect the deflection angle of the main shaft 14, and the adjustment controller releases a command to the lifting mechanism to adjust the support arm of the torque control mechanism on the main shaft 14 through the lifting mechanism. The torque control mechanism includes a sliding A limiting sleeve 25 is movably mounted on the main shaft 14, and a plurality of supporting sleeves 26 equidistantly distributed around the circumference are fixed to the side wall of the limiting sleeve 25. The supporting sleeve 26 passes through the supporting ring 17, and an elastic component connected to the rotating ring 21 is arranged on the supporting sleeve 26, wherein the elastic component includes a supporting rod 27 slidably mounted in the supporting sleeve 26, and a limiting wheel 28 is fixed at one end of the supporting rod 27 away from the supporting sleeve 26, and the limiting wheel 28 abuts against the rotating ring 21, and a spring 29 abutting against the support rod 27 is fixed in the supporting sleeve 26.

[0053] Furthermore, in the initial state, the support ring 17 is located at the end of the stroke in the direction of the drive box 13, so that the distance between the limit sleeve 25 and the drive box 13 is minimized. At this time, the support force arm of the limit sleeve 25 on the main shaft 14 is minimized, and the spring 29 is in a compressed state. Therefore, the spring 29 will provide a driving force in the opposite directions of the support rod 27 and the support sleeve 26, respectively, so that the support rod 27 is located at the end of the stroke away from the support sleeve 26, and the limit wheel 28 abuts against the inner wall of the rotating ring 21. The support sleeve 26 also provides support forces in multiple directions to the limit sleeve 25. If the bearing is worn or the matching size is not good, it is necessary to increase the support force on the main shaft 14. Support force. At this time, under the action of the third screw rod 15, the support ring 17 moves in the direction away from the drive box 13, and the support ring 17 will drive the support sleeve 26 to move, thereby driving the limiting sleeve 25 to move along the length direction of the main shaft 14. The support sleeve 26 will also drive the support rod 27 and the limiting wheel 28 to move. The support ring 17 will also drive the rotating ring 21 to move synchronously through the support guide rail 20 and the sliding block 22 to ensure that the limiting wheel 28 is always in abutment with the rotating ring 21. As the distance between the limiting sleeve 25 and the drive box 13 increases, the force arm provided by the limiting sleeve 25 to the main shaft 14 increases, thereby increasing the supporting force on the main shaft 14.

[0054] Preferably, when the rotating ring 21 moves, under the action of the strength control component, the rotating ring 21 will also control the sliding block 22 to slide along the support guide rail 20, so that the rotating ring 21 rotates around the main shaft 14. Under the action of the strength control component, the limit wheel 28 is controlled to move toward the support ring 17, so that the spring 29 is compressed through the support rod 27 to achieve an increase in the radial support force of the main shaft 14 while increasing the support force arm of the main shaft 14, so as to correct the main shaft 14.

[0055] Among them, the correction operation on the main shaft 14 is completed through the detection of the error detection module. When the main shaft 14 deflects during rotation, the force on the pressure sensor will change. The pressure sensor can record and analyze the data and release the execution signal to the adjustment controller. After receiving the execution signal, the adjustment controller controls the rotation of the third screw rod 15 through the driving source, thereby adjusting the supporting force arm of the main shaft 14 to achieve the effect of real-time monitoring and active correction of the main shaft 14.

[0056] See also Figure 2 , Figure 5-Figure 7 , Fig. 9 , Fig.10 , a strength control component is arranged on the rotating ring 21 and connected to the torque control mechanism. When the lifting mechanism moves, the strength control component can drive the rotating ring 21 to rotate to adjust the supporting state of the torque control mechanism on the main shaft 14. The strength control component includes an inclined groove 2101 provided on the rotating ring 21, and a limiting column 23 slidingly connected to the inclined groove 2101 is fixed on the third guide rod 18. A plurality of inclined blocks 24 equidistantly distributed on the circumference are fixed on the rotating ring 21, and the inclined blocks 24 are in contact with the limiting wheel 28.

[0057] Furthermore, in the initial state, the rotating ring 21 is located at the end of the stroke toward the drive box 13, so that the limit column 23 is located at the end of the stroke on the side of the inclined groove 2101, so that the tilting block 24 fixed on the rotating ring 21 and the limit wheel 28 are in a separated state. At this time, the compression amount of the spring 29 is small. If the main shaft 14 has an error, the main shaft 14 needs to be corrected. At this time, under the action of the third screw rod 15, the support ring 17 moves in the direction away from the drive box 13, thereby driving the rotating ring 21 to move, and the rotating The ring 21 will also drive the inclined groove 2101 to move. Under the action of the inclined groove 2101 and the limiting column 23, the rotating ring 21 rotates around the main shaft 14. The rotating ring 21 will also drive the tilting block 24 to move. When the inclined surface of the tilting block 24 abuts against the limiting wheel 28, the limiting wheel 28 is driven to move toward the support ring 17, thereby compressing the spring 29 through the support rod 27. Under the action of the tilting block 24 and the limiting wheel 28, when the supporting force arm of the main shaft 14 is increased, the radial supporting force of the main shaft 14 is increased synchronously.

[0058] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A large CNC machine tool based on spindle error warning correction, comprising: A machine tool body (1), and a receiving plate (2) movably mounted in the machine tool body (1); It is characterized by further comprising: A multi-directional displacement mechanism is arranged in the machine tool body (1), a movable box (12) is connected to the multi-directional displacement mechanism, and a driving box (13) is rotatably mounted on the movable box (12); a displacement detection module, arranged in the machine tool body (1), the displacement detection module comprising a PLC signal sensor, a displacement sensor, and an early warning sensor, the displacement sensor being capable of detecting the displacement of the multi-directional displacement mechanism and collecting detection data and sending the data to the PLC signal sensor, so that when abnormal displacement occurs, early warning processing is performed through the early warning sensor; A main shaft (14) is rotatably mounted on an end of the drive box (13); a lifting mechanism is provided on the drive box (13); a rotating ring (21) is connected to the lifting mechanism; and a torque control mechanism connected to the lifting mechanism and the rotating ring (21) is provided on the main shaft (14); an error detection module, arranged on the spindle (14), the error detection module comprising a pressure sensor and an adjustment controller, detecting the deflection angle of the spindle (14) via the pressure sensor, and releasing a command to the lifting mechanism via the adjustment controller, so as to adjust the support arm of the torque control mechanism on the spindle (14) via the lifting mechanism; a strength control component, arranged on the rotating ring (21) and connected to the torque control mechanism, wherein the strength control component can drive the rotating ring (21) to rotate when the lifting mechanism moves, so as to adjust the supporting state of the torque control mechanism on the main shaft (14); The lifting mechanism comprises a third screw rod (15) rotatably mounted on the driving box (13); a third threaded sleeve (16) threadably mounted on the third screw rod (15) and threadably matched with the third screw rod (15); a support ring (17) is fixed to a side wall of the third threaded sleeve (16); and a sliding assembly connected to the support ring (17) is provided on the driving box (13); The sliding assembly comprises a third guide rod (18) fixedly mounted on the drive box (13), a third guide sleeve (19) being slidably mounted on the third guide rod (18), and the third guide sleeve (19) being fixedly connected to the support ring (17); It also includes support rails (20) respectively fixedly mounted on the side walls of the third threaded sleeve (16) and the third guide sleeve (19), and a sliding block (22) slidably connected to the support rails (20) is fixed on the rotating ring (21); The torque control mechanism comprises a limiting sleeve (25) slidably mounted on the main shaft (14); a plurality of supporting sleeves (26) equidistantly distributed around a circumference are fixed to the side wall of the limiting sleeve (25); the supporting sleeves (26) penetrate the supporting ring (17); and an elastic component connected to the rotating ring (21) is arranged on the supporting sleeve (26).

2. A large CNC machine tool based on spindle error warning correction according to claim 1, characterized in that: The multi-directional displacement mechanism comprises a first screw rod (3) rotatably mounted in the machine tool body (1); a first threaded sleeve (4) threadably mounted on the first screw rod (3) and threadably engaged with the first screw rod (3); a movable frame (7) is fixed to the first threaded sleeve (4); and a guide assembly connected to the movable frame (7) is arranged in the machine tool body (1).

3. A large CNC machine tool based on spindle error early warning correction according to claim 2, characterized in that: The guide assembly comprises a first guide rod (5) fixedly mounted in the machine tool body (1); a first guide sleeve (6) is slidably mounted on the first guide rod (5); the first guide sleeve (6) is fixedly connected to the movable frame (7); and a vertical translation structure connected to the movable box (12) is provided on the movable frame (7).

4. A large CNC machine tool based on spindle error warning correction according to claim 3, characterized in that: The vertical translation structure comprises a second screw rod (8) rotatably mounted on the movable frame (7); a second threaded sleeve (9) threadably mounted on the second screw rod (8) and threadably matched with the second screw rod (8); a second guide rod (10) fixed on the movable frame (7); a second guide sleeve (11) slidably mounted on the second guide rod (10); and the second threaded sleeve (9) and the second guide sleeve (11) are fixedly connected to the movable box (12).

5. A large CNC machine tool based on spindle error early warning correction according to claim 1, characterized in that: The elastic component comprises a support rod (27) slidably mounted in the support sleeve (26); a limiting wheel (28) is fixed to one end of the support rod (27) away from the support sleeve (26); the limiting wheel (28) abuts against the rotating ring (21); and a spring (29) abuts against the support rod (27) is fixed in the support sleeve (26).

6. A large CNC machine tool based on spindle error early warning correction according to claim 5, characterized in that: The strength control component comprises an inclined groove (2101) provided on the rotating ring (21); a limiting column (23) slidably connected to the inclined groove (2101) is fixed on the third guide rod (18); a plurality of inclined blocks (24) equidistantly distributed on a circumference are fixed on the rotating ring (21); the inclined blocks (24) are in abutment with the limiting wheel (28).

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