Spindle speed test bench and its test system

Abstract

The present invention discloses a rotational speed test bench and a test system for an electric spindle, including a working test bench. A rotational speed and torque measuring device, a data processing unit, a host computer, and a motor are fixed to the upper end of the working test bench. Two symmetrically arranged fixing components are provided at the upper end of the working test bench, and an electric spindle is fixed to the two fixing components. One fixing component is slidably connected to the working test bench, and the other fixing component is fixedly connected to the working test bench. A fixing ring is fixed to the left end of the fixing component fixed to the working test bench. A detection component slidably connected to the working test bench is provided at the left end of the fixing ring. An installation ring fixedly connected to the working test bench is provided at the left end of the detection component. A coupling is rotatably connected to the left end of the installation ring. A plurality of guide rods passing through the sliding seat are fixed between the installation ring and the fixing ring. By moving and detecting the position of the detection component at the rotating shaft of the electric spindle, it is beneficial to detect whether the rotating end and the fixed end of the electric spindle are concentric.

Description

Technical Field

[0001] The present invention relates to the technical field of electric spindles, and particularly to a rotational speed test bench and a test system for an electric spindle. Background Art

[0002] An electric spindle is a new technology that integrates the machine tool spindle and the spindle motor in the field of numerical control machine tools. The spindle is a set of components, which includes the electric spindle itself and its accessories: the electric spindle, high-frequency variable frequency device, oil mist lubricator, cooling device, built-in encoder, tool changer, etc. This transmission structure form in which the spindle motor and the machine tool spindle are "combined into one" makes the spindle component relatively independent from the machine tool's transmission system and overall structure. Therefore, it can be made into a "spindle unit", commonly known as an "electric spindle", with the characteristics of high rotational speed, high precision, low noise, and a structure with a lock mouth on the inner ring being more suitable for spray lubrication.

[0003] Chinese Patent Application No. CN201820228025.0 discloses a non-contact electric spindle reliability test bench, which includes a base. On the base, a power dynamometer assembly, a rotational speed and torque sensor assembly, a ceramic test rod, a magnetic conductive ring, an electromagnet assembly, a non-contact electromagnetic exciter assembly, and an electric spindle assembly are sequentially arranged. The power dynamometer assembly includes a power dynamometer, and the output shaft of the power dynamometer is connected to the rotational speed and torque sensor assembly. The rotational speed and torque sensor assembly includes a rotational speed and torque sensor and an elastic coupling. One end of the rotational speed and torque sensor is connected to the output shaft of the power dynamometer, and the other end is connected to the elastic coupling. The elastic coupling is connected to one end of the ceramic test rod. A magnetic conductive ring is sleeved in the middle of the ceramic test rod. A non-contact electromagnetic exciter assembly is arranged on the front side of the magnetic conductive ring, and an electromagnet assembly is arranged on the rear side of the magnetic conductive ring. The other end of the ceramic test rod is connected to the electric spindle assembly. Torque loading is realized by using the power dynamometer, radial loading is realized by using the non-contact exciter, and axial loading is realized by using the electromagnet.

[0004] Chinese Patent Application No. 201820585797.X discloses an electric spindle comprehensive performance test system, which includes: a host computer, a frequency converter for driving the electric spindle to be tested to operate, an electric spindle tooling mechanism for positioning the electric spindle to be tested, a runout measuring device for measuring the core shaft axial runout information of the electric spindle to be tested, and a rotational speed and torque measuring device for measuring the rotational speed and torque information of the electric spindle to be tested; a plurality of temperature sensors for collecting the temperature information at different positions on the surface of the electric spindle to be tested, a plurality of sound level sensors for collecting the noise information at different positions during the operation of the electric spindle to be tested, and a vibration sensor for collecting the vibration information during the operation of the electric spindle to be tested are further connected to the electric spindle tooling mechanism; the host computer performs comprehensive performance tests on the electric spindle to be tested according to the information collected by each measuring device and sensor, realizing the automatic test of the comprehensive performance of the electric spindle, with high test efficiency, accurate and reliable test results; simple structure, convenient installation, and capable of completing the tests of electric spindles of various specifications.

[0005] The following problems will occur during the use of the above solution:

[0006] 1. When detecting the electric spindle, the detected rotational speed and torque information of the electric spindle cannot detect the concentricity of the rotating end and the fixed end of the electric spindle. During the use of the electric spindle, if the rotating end and the fixed end are not concentric, it will cause the motor to vibrate, affect the operation of the motor, generate noise. At the same time, the internal friction of the non-concentric electric spindle increases, resulting in an increase in energy loss, thereby reducing the overall efficiency of the motor and shortening the service life.

[0007] 2. When connecting the electric spindle to the detection device, the above solutions are all connected through a coupling or a flange. When connecting the flange and the coupling to the electric spindle, screws are usually used for connection. Due to the different diameters of the electric spindles, the depths of the screw meshing are also different. When the electric spindle is tested for rotation, it will affect the dynamic balance of the electric spindle, resulting in deviation of the detection data. Summary of the Invention

[0008] In view of the above problems, the present invention provides a rotational speed test bench for an electric spindle and its test system, which solves the above problems.

[0009] To achieve the above object, the present invention provides the following technical solution: A rotational speed test bench for an electric spindle and its test system, including a working test bench, on the upper end of the working test bench, a rotational speed and torque measuring device, a data processing unit, a host computer and a motor are fixed. On the upper end of the working test bench, there are two symmetrically arranged fixing components, and an electric spindle is fixed on the two fixing components. The fixing component includes a clamping plate. One of the fixing components is slidably connected to the working test bench, and the other fixing component is fixedly connected to the working test bench. The left end of the electric spindle is connected to a coupling, and the left end of the coupling is connected to a rotational speed and torque measuring device. A clamping block is slidably connected inside the clamping plate. One side of the clamping block is conveniently connected to a clamping rod through transmission. The clamping rod is an electric telescopic rod. The outer wall of the fixed section of the clamping rod is provided with threads, and the clamping rod is connected to the clamping plate through the threads. One end of the clamping rod is connected to the clamping block, and the other end of the clamping rod is provided with a hexagonal counterbore. A hexagonal rod is drivingly and slidably connected inside the hexagonal counterbore. The hexagonal rod is drivingly connected to a servo motor, and the servo motor is fixedly connected to the clamping plate. A fixing ring is fixed at the left end of the fixing component fixed on the working test bench. A detection component slidably connected to the working test bench is provided at the left end of the fixing ring. A coupling is rotatably connected to the left end of the mounting ring. A plurality of guide rods passing through the sliding seat are fixed between the mounting ring and the fixing ring. The fixing component, the detection component, the mounting ring and the fixing ring are coaxially arranged;

[0010] The detection component includes a sliding seat, which is slidably connected to the working test bench. A ink supply ring is fixed to the upper end of the sliding seat. A connecting ring is fixed to the inner side of the ink supply ring. A plurality of fixed cylinders are fixed to the inner side of the connecting ring along its circumference. A sliding rod is slidably connected to the inside of the fixed cylinder through a spring. A distance measuring sensor A is fixed to one end of the fixed cylinder close to the sliding rod. A ball is rotatably connected to the end of the sliding rod away from the distance measuring sensor A. A marking component fixedly connected to the sliding rod is provided outside the ball.

[0011] The marking component includes an ink jet chamber, which is communicated with the ink supply ring. A plurality of spray holes are opened along the circumference at the lower end of the ink jet chamber. A plurality of sliding columns are fixed to the inside of the ink jet chamber along its circumference. A blocking ring is slidably connected to the sliding columns. The upper end of the blocking ring is fixedly connected to the ink jet chamber through a compression spring. A plurality of blocking heads corresponding to the spray holes one by one are fixed to the lower end of the blocking ring along its circumference. An electromagnet A is fixed to the upper end of the ink jet chamber.

[0012] Preferably, the inside of the fixed cylinder is hollow, the sliding rod is slidably connected to the inside of the fixed cylinder, and the lengths of the plurality of sliding rods extending in the natural state are the same. Ink supply rubber hoses are provided inside both the fixed cylinder and the sliding rod. The two ends of the ink supply rubber hose are respectively communicated with the ink supply ring and the ink jet chamber. The spray holes opened at the lower end of the ink jet chamber are annular and surround the ball. Contact sensors are fixed to both the left and right ends of the ink supply ring.

[0013] Preferably, a plurality of telescopic rods are fixed to the inner wall of the mounting ring along its circumference. Distance measuring sensors B are fixed to the telescopic rods. The lengths of the telescopic rods extending in the static state are the same. Two symmetrically arranged commutators are fixed to the lower end of the mounting ring. The two commutators are respectively drivingly connected to a moving lead screw. The moving lead screw is rotationally connected to the fixing component. The moving lead screw is drivingly connected to the sliding seat. The motor is drivingly connected to both commutators. The motor makes the moving lead screws rotate synchronously through the commutators.

[0014] Preferably, one end of the coupling is rotationally connected to the mounting ring. A margin for relative sliding with the coupling is provided at the connection between the coupling and the mounting ring. The other end of the coupling is drivingly connected to the input shaft of the rotational speed and torque measuring device. The coupling includes two symmetrically arranged connecting cylinders, which are flexibly connected between the two connecting cylinders. A rotating ring is rotationally connected to the connecting cylinder. A limiting ring is slidably connected to the connecting cylinder. A plurality of rotating cylinders rotationally connected to the connecting cylinder are provided between the limiting ring and the rotating ring. The rotating cylinders are meshed with the rotating ring and the rotating cylinders.

[0015] Preferably, a plurality of limiting grooves are formed in the inner wall of the connecting cylinder along its circumference. A fixing plate is slidably connected to the inside of the connecting cylinder through the limiting grooves. The fixing plate and the limiting grooves are slidably connected through springs. One end of the fixing plate is fixed with an electromagnet B and a limiting pin. The limiting pin penetrates through the electromagnet B. A groove corresponding to the limiting pin is formed on the electric main shaft. The other end of the fixing plate is fixed with a storage battery, and the storage battery supplies power to the electromagnet B.

[0016] Preferably, a plurality of mounting grooves are formed in the outer wall of the connecting cylinder along its circumference. Elastic pieces are arranged in the mounting grooves. Corresponding abutting blocks are arranged on the inner side of the limiting ring along its circumference. The abutting blocks are inserted into the mounting grooves and connected to the elastic pieces. The limiting ring limits the rotating cylinder to prevent it from rotating.

[0017] Preferably, threaded rods are connected to the lower ends of the rotating cylinders in a threaded manner. Clamping blocks are fixed to the lower ends of the threaded rods. One ends of telescopic cylinders are hinged to the left ends and the right ends of the clamping blocks respectively. The other ends of the telescopic cylinders are hinged to the connecting cylinder respectively.

[0018] Preferably, an adjusting screw rod is arranged between the two fixing components. One end of the adjusting screw rod is rotatably connected to the fixing component fixed with a fixing ring, and the adjusting screw rod is in transmission connection with the other fixing component. The fixing component includes a vibration sensor. A sliding seat slidably connected to the working test bench is fixed to the lower end of the vibration sensor. A clamping plate is fixed to the upper end of the vibration sensor. A worm gear is rotatably connected to the inside of the clamping plate. A plurality of top blocks are evenly distributed on the inner wall of the worm gear. A plurality of clamping blocks slide inside the clamping plate. The clamping blocks correspond to the top blocks one by one. A worm is rotatably connected to the clamping plate, and the worm is in transmission connection with the worm gear.

[0019] Preferably, a plurality of hydraulic rods are fixed along the circumference inside the fixing ring. Distance measuring sensors C are fixed to the fixed ends of the hydraulic rods.

[0020] The rotational speed testing system of the electric main shaft uses the above-mentioned rotational speed testing bench of the electric main shaft, and includes the following steps:

[0021] S1: Fix the electric main shaft through the fixing component, and connect the electric main shaft to the rotational speed and torque measuring device through a coupling;

[0022] S2: The sliding rod, the distance measuring sensor C and the telescopic rod extend to clamp the electric main shaft, and the data of the electric main shaft are detected by the corresponding distance measuring sensors A and B. At the same time, the moving screw rod rotates to drive the detection component to move to detect whether the electric main shaft is concentric;

[0023] S3: When the detection component detects the position where the electric spindle is not concentric and the position where the surface is uneven, the marking component sprays ink for marking, which facilitates the adjustment and repair of the electric spindle;

[0024] S4: Connect the electric spindle and the rotational speed and torque measuring device through a coupling. The rotational speed and torque measuring device facilitates the detection of the torque and rotational speed of the electric spindle, and is displayed and recorded through the data processing unit and the upper computer.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] By moving and detecting at the position of the rotating shaft of the electric spindle through the detection component, it is beneficial to detect whether the rotating end and the fixed end of the electric spindle are concentric, and at the same time, the specific non-concentric position of the rotating end can be obtained, ensuring that the surface of the rotating end of the electric spindle is flat and concentric with the fixed end; by the balls abutting against the surface of the rotating end of the electric spindle, when encountering protrusions or depressions, the balls and the sliding rod will cooperate to extend or retract relatively. At the same time, the distance measuring sensor A detects the extension amount of the sliding rod in real time. Through the change of the extension amount of the sliding rod, it can be obtained whether the surface of the rotating end of the electric spindle is smooth and whether it is concentric with the fixed end of the electric spindle.

[0027] By the cooperation of the marking component and the detection component, when there is an uneven surface at the rotating end of the electric spindle or a position that causes the rotating end and the fixed end of the electric spindle to be non-concentric, the marking component sprays ink for marking, which facilitates the rapid repair and adjustment of the electric spindle; by fixing the contact sensor on the ink supply ring, when the sliding seat moves, it effectively prevents the sliding seat from hitting the mounting ring and the fixing ring, preventing damage to some devices.

[0028] A coupling is set to connect the input shaft of the electric spindle and the rotational speed and torque measuring device. The center lines of the rotating cylinder and the fixing plate arranged inside the coupling are both located on the axis inside the coupling. While the coupling is rotating, the dynamic balance of the coupling itself can be ensured to be stable, preventing errors in the detection data due to the unstable dynamic balance of the coupling when detecting the electric spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the present invention;

[0030] Figure 2 is the internal structural schematic diagram of the clamping plate of the present invention;

[0031] Figure 3 is the overall structural schematic diagram of the present invention;

[0032] Figure 4 is the schematic diagram of the test bench of the present invention;

[0033] Figure 5 is the overall schematic diagram of the detection component of the present invention;

[0034] Figure 6 Overall schematic diagram of the fixing cylinder of the present invention;

[0035] Figure 7 Cross-sectional schematic diagram of the fixing cylinder of the present invention;

[0036] Figure 8 Explosion schematic diagram of the inkjet chamber of the present invention;

[0037] Figure 9 Overall schematic diagram of the mounting ring of the present invention;

[0038] Figure 10 Overall schematic diagram of the coupling of the present invention;

[0039] Figure 11 Partially enlarged schematic diagram of the coupling of the present invention;

[0040] Figure 12 Explosion schematic diagram of the coupling of the present invention;

[0041] Figure 13 Cross-sectional schematic diagram of the fixing component of the present invention;

[0042] Figure 14 Overall structural schematic diagram of the fixing component of the present invention.

[0043] Explanation of the markings in the figure: 1. Working test bench; 2. Slide; 3. Mounting ring; 4. Fixed ring; 5. Coupling; 6. Clamping plate; 7. Clamping block; 11. Rotational speed and torque measuring device; 12. Data processing unit; 13. Host computer; 14. Adjusting lead screw; 15. Moving lead screw; 16. Motor; 17. Guide rod; 21. Ink supply ring; 22. Connecting ring; 23. Fixing cylinder; 24. Slide bar; 25. Ball; 26. Distance measuring sensor A; 27. Inkjet chamber; 28. Ink supply rubber tube; 29. Electromagnet A; 31. Telescopic rod; 311. Distance measuring sensor B; 41. Hydraulic rod; 411. Distance measuring sensor C; 51. Connecting cylinder; 52. Limiting ring; 53. Rotating ring; 54. Rotating cylinder; 55. Fixed plate; 61. Vibration sensor; 62. Sliding seat; 63. Worm gear; 64. Clamping block; 65. Worm; 161. Commutator; 511. Installation groove; 512. Elastic piece; 513. Limiting groove; 211. Contact sensor; 271. Slide column; 272. Plugging ring; 273. Plug; 274. Spray hole; 521. Blocking block; 541. Threaded rod; 542. Clamping block; 543. Telescopic cylinder; 551. Electromagnet B; 552. Limiting pin; 553. Battery; 631. Top block. 7. Clamping block; 71. Clamping rod; 72. Hexagonal counterbore; 73. Servo motor. Detailed implementation manners

[0044] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0045] Embodiment 1:

[0046] Please refer to Figure 3 、 Figure 4 and Figure 14, the rotational speed test bench and its test system for an electric spindle, including a working test bench 1. At the upper end of the working test bench 1, there are a rotational speed and torque measuring device 11, a data processing unit 12, a host computer 13, and a motor 16. The data processing unit 12 and the host computer 13 are existing devices and will not be elaborated further here. The data processing unit 12 and the host computer 13 are mainly used to process, reflect, and record the data generated by this device. The motor 16 provides power to ensure that the detection component can move to detect the rotating end of the electric spindle. The rotational speed and torque measuring device 11 is used to detect the rotational speed and torque of the electric spindle. At the upper end of the working test bench 1, there are two symmetrically arranged fixing components. An electric spindle is fixed on the two fixing components. One of the fixing components is slidably connected to the working test bench 1, and the other fixing component is fixedly connected to the working test bench 1. The fixing component realizes the fixation of the electric spindle and ensures that both ends of the electric spindle are at the same height. Further, by setting one of the two fixing components fixedly and the other slidably, the fixing component can be applicable to electric spindles of different lengths, with greater applicability. At the left end of the fixing component fixed on the working test bench 1, there is a fixing ring 4. At the left end of the fixing ring 4, there is a detection component slidably connected to the working test bench 1. By moving and detecting the position of the detection component on the rotating shaft of the electric spindle, it is beneficial to detect whether the rotating end and the fixed end of the electric spindle are concentric, and at the same time, the specific non-concentric position of the rotating end can be obtained, ensuring that the surface of the rotating end of the electric spindle is flat and concentric with the fixed end. At the left end of the detection component, there is a mounting ring 3 fixedly connected to the working test bench 1. At the left end of the mounting ring 3, there is a coupling 5. The coupling 5 is used to connect the electric spindle and the rotational speed and torque measuring device 11, so that the electric spindle drives the rotational speed and torque measuring device 11 to rotate, and the rotational speed and torque measuring device 11 is used to detect the rotational speed and torque of the electric spindle. Between the mounting ring 3 and the fixing ring 4, there are multiple guide rods 17 passing through the sliding seat 2. The fixing component, the detection component, the mounting ring 3, and the fixing ring 4 are coaxially arranged. Inside the fixing ring 4, along its circumference, there are multiple hydraulic rods 41 fixed. At the fixed ends of the hydraulic rods 41, there are range sensors C411 fixed. The hydraulic rods 41 expand and contract to clamp and fix the fixed end of the electric spindle. At the same time, the range sensors C411 detect the amount of extension of the hydraulic rods 41, which is convenient for fixing the fixed end of the electric spindle. At the same time, the diameter of the electric spindle and whether the fixed end of the electric spindle is concentric with the fixing component and the fixing ring 4 can be obtained through the numerical change of the range sensors C411. When the data of each range sensor C411 are the same, it means that the fixed end of the electric spindle is concentrically fixed with the fixing ring 4.

[0047] Please refer to Figure 5 , Figure 6 , Figure 7, Considering that during the use of the motorized spindle, if the rotating end and the fixed end are not concentric, it will cause the motor to vibrate, affect the operation of the motor, generate noise. At the same time, the internal friction of the non-concentric motorized spindle increases, resulting in an increase in energy loss, thereby reducing the overall efficiency of the motor and shortening the service life. The detection component includes a sliding seat 2, which is slidably connected to the working test bench 1. A supply ink ring 21 is fixed to the upper end of the sliding seat 2. A connecting ring 22 is fixed to the inner side of the supply ink ring 21. A plurality of fixed cylinders 23 are fixed along the circumference of the inner side of the connecting ring 22. A sliding rod 24 is slidably connected to the inside of the fixed cylinder 23 through a spring. A distance measuring sensor A26 is fixed to one end of the fixed cylinder 23 close to the sliding rod 24. A ball 25 is rotatably connected to the end of the sliding rod 24 away from the distance measuring sensor A26. The inside of the fixed cylinder 23 is hollow, and the sliding rod 24 is slidably connected to the inside of the fixed cylinder 23 through a spring. The ball 25 abuts against the surface of the rotating end of the motorized spindle. When encountering protrusions or depressions, the ball 25 and the sliding rod 24 will cooperate to extend or retract relatively. At the same time, the distance measuring sensor A26 detects the extension amount of the sliding rod 24 in real time. By the change of the extension amount of the sliding rod 24, it can be obtained whether the surface of the rotating end of the motorized spindle is smooth and whether it is concentric with the fixed end of the motorized spindle. The lengths of the plurality of sliding rods 24 extending in the natural state are the same. Ink supply rubber tubes 28 are provided inside the fixed cylinder 23 and the sliding rod 24. The two ends of the ink supply rubber tube 28 are respectively communicated with the supply ink ring 21 and the ink jet chamber 27. By connecting the supply ink ring 21 and the fixed cylinder 23 through the ink supply rubber tube 28, it is beneficial to transport the ink in the supply ink ring 21 to the ink jet chamber 27 to ensure that there is sufficient ink in the ink jet chamber 27 and prevent the inability to mark due to insufficient ink. The spray holes 274 opened at the lower end of the ink jet chamber 27 are annular and surround the ball 25. Contact sensors 211 are fixed to both the left end and the right end of the supply ink ring 21. By fixing the contact sensors 211 on the supply ink ring 21, when the sliding seat 2 moves, it effectively prevents the sliding seat 2 from hitting the mounting ring 3 and the fixing ring 4, preventing damage to some components. Through the cooperation of the marking component and the detection component, when there is an uneven surface at the rotating end of the motorized spindle or a position that causes the rotating end of the motorized spindle to be non-concentric with the fixed end, the marking component performs ink jet marking, which is convenient for quickly repairing and adjusting the motorized spindle.

[0048] Please refer to Figure 6 , Figure 7 and Figure 8, considering that when the rotating shaft of the motorized spindle exposed at the fixed end is not concentric with the fixed end, it is impossible to determine where the non-concentricity of the motorized spindle starts. If it can be determined and marked, it will be convenient for the maintenance and adjustment of the motorized spindle. A marking component fixedly connected to the slide bar 24 is provided on the outer side of the ball 25. The marking component performs inkjet marking on the uneven surface of the rotating end of the motorized spindle or at the position where the rotating end of the motorized spindle is not concentric with the fixed end, which is convenient for the quick maintenance and adjustment of the motorized spindle. The marking component includes an inkjet chamber 27, the inkjet chamber 27 is communicated with the ink supply ring 21, a plurality of spray holes 274 are opened along the circumference at the lower end of the inkjet chamber 27, a plurality of slide columns 271 are fixedly arranged along the circumference inside the inkjet chamber 27, a plug ring 272 is slidably connected to the slide columns 271, the upper end of the plug ring 272 is fixedly connected to the inkjet chamber 27 through a compression spring, and a plurality of plug heads 273 corresponding to the spray holes 274 one by one are fixedly arranged along the circumference at the lower end of the plug ring 272. An electromagnet A29 is fixedly arranged at the upper end of the inkjet chamber 27. When the ball 25 rolls on the rotating end face of the motorized spindle and encounters an uneven rotating end face of the motorized spindle, the ball 25 will push against the slide bar 24 to move. At this time, the distance measuring sensor A26 detects the telescopic amount of the slide bar 24, and the value of the distance measuring sensor A26 will change. At this time, the electromagnet A29 is energized to adsorb the plug ring 272 upward, the spring on the plug ring 272 is compressed, the plug head 273 moves away from the spray hole 274, and the ink in the inkjet chamber 27 sprays out to perform inkjet marking on the uneven place of the rotating end face of the motorized spindle. When the value detected by the distance measuring sensor A26 is restored, the electromagnet A29 is powered off. At this time, the spring on the plug ring 272 will push the plug ring 272 downward to move, so that the plug head 273 blocks the spray hole 274 again. At this time, the ink in the inkjet chamber 27 no longer sprays out. At the same time, slide columns 271 are arranged inside the inkjet chamber 27, and the slide columns 271 play a guiding role in the sliding of the plug ring 272, so that the plug head 273 can accurately block the spray hole 274.

[0049] Please refer to Figure 3 , Figure 4 and Figure 9Considering the concentric detection of the rotating end and the fixed end of the electric spindle, it is necessary to first perform fixed detection on the rotating end of the electric spindle to determine the axis of the electric spindle. At the same time, considering the detection of the end surface of the rotating end of the electric spindle, it is necessary to move the detection device to detect the changes in the surface of the rotating end of the electric spindle. The inner wall of the mounting ring 3 is fixed with a plurality of telescopic rods 31 along its circumference. The telescopic rods 31 clamp the end surface of the rotating end of the electric spindle. Distance measuring sensors B311 are fixed on the telescopic rods 31. The lengths of the telescopic rods 31 extended in a static state are consistent. The distance measuring sensor B311 detects the extension amount of the telescopic rods 31. When the electric spindle rotates, if the extension amount detected by the distance measuring sensor B311 changes repeatedly, it means that the rotating end of the electric spindle is not concentric with the electric spindle. The greater the change in the data detected by the distance measuring sensor B311, the lower the concentricity. When the data detected by sensor B311 remains unchanged, the rotating end of the surface electric spindle is concentric with the electric spindle, and two symmetrically arranged commutators 161 are fixed to the lower end of the mounting ring 3. The two commutators 161 are respectively connected to the movable screw 15 in a transmission manner. The movable screw 15 is rotatably connected to the fixed component, and the movable screw 15 is connected to the slide 2 in a transmission manner. The motor 16 is transmitted to the two commutators 161. The motor 16 causes the movable screw 15 to rotate synchronously through the commutator 161, and power is provided by the motor 16, and the transmission direction is changed through the commutator 161, so that the two movable screws 15 rotate synchronously. The rotation of the movable screw 15 drives the slide 2 to move, so that the detection component on the slide 2 detects the overall end face of the rotating end of the electric spindle, detects whether the rotating end face of the electric spindle is flat, and further detects whether the middle part of the rotating end of the electric spindle is concentric.

[0050] See also Figure 3 , Figure 10 , Figure 11 and Figure 12, Considering that when connecting the electric spindle to the detection device, it is always connected through a coupling or a flange. When connecting the flange and the coupling to the electric spindle, screws are usually used for connection. Due to the different diameters of the electric spindles, the depths of the screw meshing will also be different. When the electric spindle is undergoing a rotation test, it will affect the dynamic balance of the electric spindle, resulting in deviations in the detection data. One end of the coupling 5 is rotatably connected to the mounting ring 3, and there is a margin for relative sliding between the coupling 5 and the mounting ring 3 at the connection. The other end of the coupling 5 is drivingly connected to the input shaft of the rotational speed and torque measuring device 11. The coupling 5 includes two symmetrically arranged connecting cylinders 51, and the two connecting cylinders 51 are flexibly connected. A rotating ring 53 is rotatably connected to the connecting cylinder 51, and a limiting ring 52 is slidably connected to the connecting cylinder 51. A plurality of rotating cylinders 54 rotatably connected to the connecting cylinder 51 are provided between the limiting ring 52 and the rotating ring 53. The rotating cylinders 54 are meshed with the rotating ring 53 and the rotating cylinders 54. By setting the coupling 5 to connect the electric spindle and the input shaft of the rotational speed and torque measuring device 11, the center lines of the rotating cylinders 54 and the fixing plate 55 provided inside the coupling 5 are all located on the axis inside the coupling 5. While the coupling 5 is rotating, it can ensure the stability of the dynamic balance of the coupling 5 itself, preventing errors in the detection data due to the unstable dynamic balance of the coupling 5 during the detection of the electric spindle. A plurality of limiting grooves 513 are formed along the circumference of the inner wall of the connecting cylinder 51, and a fixing plate 55 is slidably connected to the inside of the connecting cylinder 51 through the limiting grooves 513. The fixing plate 55 is slidably connected to the limiting grooves 513 through springs. One end of the fixing plate 55 is fixed with an electromagnet B551 and a limiting pin 552, and the limiting pin 552 penetrates through the electromagnet B551. A groove corresponding to the limiting pin 552 is formed on the electric spindle. The other end of the fixing plate 55 is fixed with a storage battery 553, and the storage battery 553 supplies power to the electromagnet B551. When fixing the electric spindle, the limiting pin 552 is engaged with the groove on the electric spindle to prevent sliding when the electric spindle rotates. At the same time, after the limiting pin 552 corresponds to the groove on the electric spindle, the electromagnet B551 is energized to fix the electric spindle and prevent it from detaching. The electromagnet B551, the limiting pin 552, and the storage battery 553 are all arranged at the central position of the fixing plate 55 to ensure the stability of the overall dynamic balance of the coupling 5.

[0051] Please refer to Figure 3 , Figure 10 , Figure 11 and Figure 12, considering that after the electric spindle is clamped and fixed, the electric spindle needs to rotate when it rotates. In order to prevent the rotating drum 54 from reversing and losing the clamping of the electric spindle, the rotating drum 54 needs to be fixed. The outer wall of the connecting cylinder 51 is provided with a plurality of mounting grooves 511 along its circumference. The mounting grooves 511 are each provided with a spring sheet 512. The inner side of the limiting ring 52 is provided with a stopper 521 corresponding to the mounting grooves 511 along its circumference. The stopper 521 is inserted into the mounting groove 511 and connected with the spring sheet 512. The limiting ring 52 limits the rotating drum 54 to prevent it from rotating. The lower end of the rotating drum 54 is threadedly connected with a threaded rod 541. The lower end of the threaded rod 541 is fixed with a clamping block 542. The left and right ends of the clamping block 542 are hinged with one end of the telescopic cylinder 543. The other end of the telescopic cylinder 543 is hinged to the connecting cylinder 51. When the electric spindle needs to be connected for transmission, the electric spindle needs to be further centrally positioned to prevent deviation from affecting the dynamic balance test of the electric spindle. The rotating end of the electric spindle is inserted into the connecting cylinder 51, and the limit ring 52 is pushed to one side to release the engagement between the limit ring 52 and the rotating cylinder 54. At the same time, the spring piece 512 is compressed. At this time, the rotating ring 53 is rotated, and the rotating ring 53 drives the rotating cylinder 54 to rotate. Since the threaded rod 541 is threadedly connected to the rotating cylinder 54, and the telescopic cylinder 543 limits the rotation of the clamping block 542, multiple threaded rods 541 are synchronously extended to clamp and fix the electric spindle. At this time, the limit ring 52 is released, and the spring piece 512 is restored against the limit ring 52, and the limit ring 52 is re-engaged with the rotating cylinder 54 to prevent the rotating cylinder 54 from rotating.

[0052] See also Figure 3 , Figure 4 , Figure 13 and Figure 14, Considering the fixation of the fixed end of the motorized spindle, to ensure the horizontality of the axis line of the fixed end of the motorized spindle, the motorized spindle is fixed through a fixing device. An adjusting screw rod 14 is provided between the two fixing components. One end of the adjusting screw rod 14 is rotatably connected to the fixing component fixed with a fixing ring 4, and the adjusting screw rod 14 is in transmission connection with the other fixing component. By connecting the fixing components through the adjusting screw rod 14, the distance between the two fixing components can be adjusted, enabling the device to fix motorized spindles of different lengths. At the same time, the positions of the fixing holes of the two fixing components are concentrically arranged to ensure that both ends of the motorized spindle are horizontal when the motorized spindle is fixed. The fixing component includes a vibration sensor 61. The lower end of the vibration sensor 61 is fixed with a sliding seat 62 slidably connected to the working test bench 1. The upper end of the vibration sensor 61 is fixed with a clamping plate 6. A worm gear 63 is rotatably connected inside the clamping plate 6. A plurality of top blocks 631 are evenly distributed on the inner wall of the worm gear 63. A plurality of clamping blocks 64 slide inside the clamping plate 6. The clamping blocks 64 correspond to the top blocks 631 one by one. A worm 65 is rotatably connected to the clamping plate 6. The worm 65 is in transmission connection with the worm gear 63. When fixing the motorized spindle, by rotating the worm 65, the worm 65 meshes with the worm gear 63, driving the rotation ring 53 to rotate. At this time, the top blocks 631 inside the worm gear 63 rotate accordingly, and the top blocks 631 gradually extrude and eject the clamping blocks 64 synchronously, thereby clamping and fixing the motorized spindle.

[0053] Embodiment 2:

[0054] Please refer to Figure 1 and Figure 2, a clamping block 7 is slidably connected inside the clamping plate 6. One side of the clamping block 7 is conveniently connected to a clamping rod 71 in a driving manner. The clamping rod 71 is an electric telescopic rod. The outer wall of the fixed section of the clamping rod 71 is provided with threads. The clamping rod 71 is connected to the clamping plate 6 through the threads. One end of the clamping rod 71 is connected to the clamping block 7. The other end of the clamping rod 71 is provided with a hexagonal counterbore 72. A hexagonal rod is drivingly and slidably connected inside the hexagonal counterbore 72. The hexagonal rod is drivingly connected to a servo motor 73. The servo motor 73 is fixedly connected to the clamping plate 6. When in use, the electric spindle is placed in the center of the clamping plate 6, and the clamping rods 71 are controlled to work synchronously, so that the extending ends of the clamping blocks 7 press against the clamping blocks 7 to move, and the electric spindle is initially clamped. After the electric spindle is fixed, the rotating end of the electric spindle is connected to the input end of the rotational speed and torque measuring device 11 through a coupling. The rotational speed and torque measuring device 11 is an existing device and is internally provided with an angle sensor. The electric spindle is started to work at a low speed. The vibration sensor 61 and the angle sensor built in the rotational speed and torque measuring device 11 cooperate with each other to determine the maximum phase point of the vibration when the electric spindle rotates. The relative servo motor 73 is used to drive the hexagonal rod to rotate, and then the clamping rod 71 is rotated to adjust the concentricity of the electric spindle. The electric spindle is started to rotate again. After multiple corrections, the minimum vibration point is determined, and then the high-speed performance test is carried out. After the test is completed, the clamping rod 71 retracts and resets for the next test.

[0055] When the present invention is in use:

[0056] First, rotate the worm 65. The worm 65 meshes with the worm gear 63 and drives the rotating ring 53 to rotate. At this time, the top block 631 inside the worm gear 63 rotates accordingly. The top block 631 gradually presses and ejects the clamping blocks 64 synchronously, and then the electric spindle is clamped and fixed. The limit pin 552 is clamped and corresponded to the groove on the electric spindle to prevent the electric spindle from sliding when rotating. At the same time, after the limit pin 552 corresponds to the groove on the electric spindle, the electromagnet B 551 is energized to fix the electric spindle. The other end of the coupling 5 performs repeated operations and is fixedly connected to the rotational speed and torque measuring device 11. The hydraulic rod 41 extends and retracts to clamp and fix the fixed end of the electric spindle. At the same time, the distance measuring sensor C 411 detects the amount of extension of the hydraulic rod 41, which is convenient for fixing the fixed end of the electric spindle. At the same time, the diameter of the electric spindle and whether the fixed end of the electric spindle is concentric with the fixing component and the fixing ring 4 can be obtained through the numerical change of the distance measuring sensor C 411. When the data of each distance measuring sensor C 411 are the same, it means that the fixed end of the electric spindle is concentrically fixed with the fixing ring 4;

[0057] Then, the ball 25 abuts against the surface of the rotating end of the motorized spindle. When encountering protrusions or depressions, the ball 25 and the slide bar 24 cooperate to protrude or retract relatively. At the same time, the distance measuring sensor A26 detects the protruding amount of the slide bar 24 in real time. Through the change of the protruding amount of the slide bar 24, it is obtained whether the surface of the rotating end of the motorized spindle is smooth and whether it is concentric with the fixed end of the motorized spindle.

[0058] Next, when the slide base 2 moves, it effectively prevents the slide base 2 from hitting the mounting ring 3 and the fixing ring 4, preventing damage to some components. Through the cooperation of the marking component and the detection component, when there are unevenness on the surface of the rotating end of the motorized spindle or positions that cause the rotating end of the motorized spindle to be non-concentric with the fixed end, the marking component performs inkjet marking, which is convenient for quickly repairing and adjusting the motorized spindle.

[0059] Finally, the data processing unit 12 and the host computer 13 process, respond to, and record the data generated by the device. The motor 16 provides power to ensure that the detection component can move to detect the rotating end of the motorized spindle. The rotational speed and torque measuring device 11 is used to detect the rotational speed and torque of the motorized spindle.

[0060] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A speed test bench for an electric spindle, comprising a working test bench (1), wherein a speed and torque measuring device (11), a data processing unit (12), a host computer (13) and a motor (16) are fixed at the upper end of the working test bench (1), characterized in that: The upper end of the working test bench (1) is provided with two symmetrically arranged fixing components, on which an electric spindle is fixed, the fixing components comprising a clamping plate (6), one of the fixing components being slidably connected to the working test bench (1), and the other fixing component being fixedly connected to the working test bench (1), the left end of the electric spindle being connected to a coupling (5), the left end of the coupling (5) being connected to a speed torque measuring device (11), the interior of the clamping plate (6) being slidably connected to a clamping block (7), one side of the clamping block (7) being convenient for transmission connection. A clamping rod (71) is connected, the clamping rod (71) is an electric telescopic rod, the outer wall of the fixed section of the clamping rod (71) is provided with a thread, the clamping rod (71) is connected to the clamping plate (6) through the thread, one end of the clamping rod (71) is connected to the clamping block (7), the other end of the clamping rod (71) is provided with a hexagonal countersunk hole (72), a hexagonal rod is transmission-connected and slidably connected in the hexagonal countersunk hole (72), the hexagonal rod is transmission-connected to a servo motor (73), and the servo motor (73) is fixedly connected to the clamping plate (6); One end of the coupling (5) is rotatably connected to the mounting ring (3); a margin for relative sliding with the coupling (5) is provided at the connection between the coupling (5) and the mounting ring (3); the other end of the coupling (5) is drivingly connected to the input shaft of the speed and torque measuring device (11); the coupling (5) comprises two symmetrically arranged connecting cylinders (51); the two connecting cylinders (51) are flexibly connected; a rotating ring (53) is rotatably connected to the connecting cylinder (51); a limit ring (52) is slidably connected to the connecting cylinder (51); a plurality of rotating cylinders (54) rotatably connected to the connecting cylinder (51) are provided between the limit ring (52) and the rotating ring (53); the rotating cylinders (54) are meshed with the rotating ring (53) and the rotating cylinders (54); A fixing ring (4) is fixed to the left end of the fixing assembly fixed on the working test bench (1); a detection assembly slidably connected to the working test bench (1) is provided at the left end of the fixing ring (4); a mounting ring (3) fixedly connected to the working test bench is provided at the left end of the detection assembly; a coupling (5) is rotatably connected to the left end of the mounting ring (3); a plurality of guide rods (17) are fixed between the mounting ring (3) and the fixing ring (4); and the fixing assembly, the detection assembly, the mounting ring (3) and the fixing ring (4) are coaxially arranged; The detection component comprises a slide seat (2), the slide seat (2) being slidably connected to the working test bench (1), an ink supply ring (21) being fixed at the upper end of the slide seat (2), a connecting ring (22) being fixed on the inner side of the ink supply ring (21), a plurality of fixed cylinders (23) being fixed on the inner side of the connecting ring (22) along its circumference, a slide rod (24) being slidably connected to the interior of the fixed cylinder (23) via a spring, a distance measuring sensor A (26) being fixed to one end of the fixed cylinder (23) close to the slide rod (24), a ball bearing (25) being rollingly connected to one end of the slide rod (24) away from the distance measuring sensor A (26), and a marking component fixedly connected to the slide rod (24) being provided on the outer side of the ball bearing (25).

2. The electric spindle speed test bench according to claim 1, characterized in that: The inner wall of the connecting cylinder (51) is provided with a plurality of limiting grooves (513) along its circumference; a fixing plate (55) is slidably connected to the interior of the connecting cylinder (51) via the limiting grooves (513); the fixing plate (55) and the limiting grooves (513) are slidably connected via a spring; an electromagnet B (551) and a limiting pin (552) are fixed to one end of the fixing plate (55); the limiting pin (552) penetrates the electromagnet B (551); a groove corresponding to the limiting pin (552) is provided on the electric spindle; a storage battery (553) is fixed to the other end of the fixing plate (55); the storage battery (553) supplies power to the electromagnet B (551).

3. The electric spindle speed test bench according to claim 2, characterized in that: The outer wall of the connecting cylinder (51) is provided with a plurality of mounting grooves (511) along its circumference, and each of the mounting grooves (511) is provided with a spring sheet (512). The inner side of the limiting ring (52) is provided with a stopper (521) corresponding to the mounting grooves (511) along its circumference, and the stopper (521) is inserted into the mounting grooves (511) and connected to the spring sheet (512). The limiting ring (52) limits the rotating cylinder (54) to prevent it from rotating.

4. The electric spindle speed test bench according to claim 3, characterized in that: The lower end of the rotating cylinder (54) is threadedly connected to a threaded rod (541), the lower end of the threaded rod (541) is fixed to a clamping block (542), the left end and the right end of the clamping block (542) are hinged to one end of a telescopic cylinder (543), and the other end of the telescopic cylinder (543) is hinged to the connecting cylinder (51).

5. The electric spindle speed test bench according to claim 4, characterized in that: An adjusting screw (14) is provided between the two fixed components. One end of the adjusting screw (14) is rotatably connected to a fixed component to which a fixing ring (4) is fixed. The adjusting screw (14) is transmission-connected to the other fixed component. The fixed component comprises a vibration sensor (61). A sliding seat (62) slidably connected to the working test bench (1) is fixed at the lower end of the vibration sensor (61). A clamping plate (6) is fixed at the upper end of the vibration sensor (61). A worm gear (63) is rotatably connected inside the clamping plate (6). A plurality of top blocks (631) are evenly distributed on the inner wall of the worm gear (63). A plurality of clamping blocks (64) are slidably provided inside the clamping plate (6). The clamping blocks (64) correspond one-to-one to the top blocks (631). A worm (65) is rotatably connected to the clamping plate (6). The worm gear (65) is transmission-connected to the worm gear (63).

6. The electric spindle speed test system is characterized by: The speed test bench for the electric spindle according to claim 5 comprises the following steps: S1: fixing the electric spindle by means of a fixing assembly, and connecting the electric spindle to a speed and torque measuring device (11) by means of a coupling (5); S2: starting the electric spindle to work at a low speed, and determining the maximum phase point of vibration when the electric spindle rotates by cooperating with the vibration sensor (61) and the angle sensor built into the speed and torque measuring device (11); S3: Use the servo motor (73) to drive the hexagonal rod to rotate, and then rotate the clamping rod (71) to adjust the concentricity of the electric spindle, and start the electric spindle again to rotate. After multiple calibrations, the minimum vibration point is determined; S4: After the detection is completed, the servo motor (73) drives the clamping rod 71 to be retracted and reset for the next detection.

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