Lathe spindle dynamic simulation device and test method

Abstract

The invention relates to a lathe spindle dynamic simulation device and a test method, and relates to the technical field of lathe spindle simulation test, the lathe spindle dynamic simulation device comprises a workbench, a clamping assembly, a rotating assembly and a test assembly, the clamping assembly comprises a first gland and a second gland, the rotating assembly comprises a rotor, a stator and a shell which are sequentially sleeved outwards and coaxially arranged with the spindle, the rotor is fixedly connected with the spindle, the stator is fixedly connected with the shell, a support is fixedly arranged on the upper end face of the workbench and fixedly connected with the outer side wall of the shell, and the shell is rotationally connected with the spindle along the axis of the shell. The testing assembly comprises an outer side pressure adjusting assembly, an inner side pressure adjusting assembly and a temperature detection device, the temperature detection device is fixedly connected with the workbench and used for detecting the temperature in the shell, and the outer side pressure adjusting assembly is used for adjusting the clamping force between the main shaft and the first gland; the inner side pressure adjusting assembly is used for adjusting the loosening force between the main shaft and the first gland. The method has the effect of reducing the detection cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lathe spindle simulation testing, in particular to a lathe spindle dynamic simulation device and testing method. BACKGROUND

[0002] In the field of mechanical processing, the lathe is a basic and key equipment, and its performance directly affects the quality and production efficiency of the processed products. The lathe electric spindle is the core component of the lathe, and its stability and reliability in operation play a crucial role in the entire processing process. With the continuous development of manufacturing industry, the performance requirements of the lathe electric spindle are becoming higher and higher, especially in the context of mass production, how to quickly and accurately detect the quality of the spindle has become a problem to be solved. Accurate evaluation of the performance of the lathe spindle can help enterprises to find problems in the spindle in time, and then improve the structure of the spindle, improve product quality, and reduce production cost, so it has important value and significance in actual production.

[0003] In the past technology, in order to detect the performance of the lathe electric spindle, the method usually adopted is to install a hydraulic chuck and a rotary cylinder on the electric spindle. The hydraulic chuck is installed at the most front end of the electric spindle, and the built-in piston of the rotary cylinder transmits force to the hydraulic chuck through a pull rod, so as to realize the function of automatically clamping and releasing the parts. In this way, the stress condition of the spindle in the actual processing process is simulated. This detection method needs a special hydraulic station and a workbench to provide power and support. And in the installation process, the positions and connection relationships of various components need to be accurately adjusted to ensure that the hydraulic chuck and the rotary cylinder can work normally. In addition, in the detection process, the pressure, flow and other parameters of the hydraulic system need to be strictly controlled to ensure the accuracy of the detection results.

[0004] The existing technology uses hydraulic chuck and rotary cylinder to detect the performance of lathe spindle, which has obvious defects. The chuck and the rotary cylinder are accessories provided by the downstream customers, and their prices are high, which increases the detection cost of enterprises. Moreover, the installation process is complex and needs to be operated by professional technicians, which not only increases the detection time, but also needs to invest a lot of labor cost. At the same time, due to the need of special hydraulic station and workbench, the detection equipment occupies a large area, which has high requirements for the detection site. These problems lead to the high cost of traditional detection method in mass production detection. SUMMARY

[0005] In order to reduce the detection cost, the present application provides a lathe spindle dynamic simulation device and testing method.

[0006] In the first aspect, the present application provides a lathe spindle dynamic simulation device, which adopts the following technical scheme: The lathe spindle dynamic simulation device comprises a workbench, a clamping assembly, a rotating assembly and a testing assembly, the clamping assembly comprises a first gland and a second gland which are respectively fixed at the two axial ends of the spindle, the rotating assembly comprises a rotor, a stator and a shell which are coaxially arranged in sequence, the rotor is fixedly connected with the spindle, the stator is fixedly connected with the shell, a support is fixedly arranged on the upper end surface of the workbench, the support is fixedly connected with the outer side wall of the shell, the shell is rotationally connected with the spindle along the axial line of the shell, the testing assembly comprises an outer side pressure adjusting assembly, an inner side pressure adjusting assembly and a temperature detection device, the temperature detection device is fixedly connected with the workbench, the temperature detection device is used for detecting the temperature inside the shell, the outer side pressure adjusting assembly is used for adjusting the clamping force between the spindle and the first gland, and the inner side pressure adjusting assembly is used for adjusting the loosening force between the spindle and the first gland.

[0007] By adopting the above technical scheme, the device does not need to install rotating oil cylinders and chucks and other accessories, thereby reducing the testing cost and installation complexity. The clamping assembly can effectively fix the spindle; the rotating assembly can make the spindle rotate stably; the support on the upper end surface of the workbench ensures the stability of the device as a whole; the temperature detection device can detect the temperature inside the shell, thereby facilitating the understanding of the heating condition of the spindle during operation; the outer side pressure adjusting assembly can adjust the clamping force between the spindle and the first gland, and the inner side pressure adjusting assembly can adjust the loosening force between the spindle and the first gland, so that the force conditions of the spindle under different working conditions can be simulated through the adjustment, and then it can be verified whether the lathe spindle produces abnormal sound when subjected to external tension and pressure, and the axial displacement and pressure change of the spindle caused by heating can be monitored during the rotation, and the change of the positioning accuracy of the spindle encoder can also be monitored, thereby realizing the quality inspection of the electric spindle, helping to find problems and improve the relevant spindle structure, and being suitable for detecting batch-produced electric spindles.

[0008] Optionally, a first clamping piece is fixedly arranged at one end of the shell close to the first gland, a second clamping piece is arranged at one side of the shell close to the second gland, a fixing flange is arranged between the second clamping piece and the shell, the fixing flange is fixedly connected with the shell, the fixing flange is fixedly connected with the support, and the second clamping piece is used for clamping the side wall of the spindle. The first clamping piece and the second clamping piece are rotationally connected with the spindle along the axial lines of the first clamping piece and the second clamping piece respectively.

[0009] By adopting the above technical scheme, the first clamping piece and the second clamping piece are arranged in the lathe spindle dynamic simulation device, so that the shell can be stably clamped, and the shaking and deviation of the spindle can be reduced. The fixing flange further enhances the stability and rigidity of the device, so that the actual force condition of the spindle can be more accurately reflected during the simulation test of the whole device.

[0010] Optionally, the first clamping member is provided with a rotating sleeve away from the side of the shell, the end of the rotating sleeve away from the shell is fixedly connected with the first gland, the end of the rotating sleeve away from the first gland is inserted into the inside of the first clamping member, the end surface of the first clamping member is abutted with the rotating sleeve and the two are rotationally connected along the axis thereof, the inner wall of the rotating sleeve is provided with a through groove penetrating along the axial direction, and the through groove is inserted with a connecting key, and the end of the connecting key away from the through groove is used for being embedded in the outer wall of the main shaft.

[0011] By adopting the above technical scheme, the rotating sleeve and the connecting key can make the first gland rotate synchronously with the main shaft, thereby ensuring the stability of the device in the simulation of the dynamic process of the main shaft, more accurately simulating the dynamic situation of the main shaft in the actual work, and improving the accuracy and reliability of the quality detection of the lathe main shaft.

[0012] Optionally, the outside pressure adjusting assembly comprises an outside pressure sensor, an outside adjusting member and an outside pressure display, the outside pressure sensor is signal connected with the outside pressure display, the outside pressure display is fixedly connected with the workbench, the outside pressure sensor is clamped between the rotating sleeve and the first gland, and the outside adjusting member is used for adjusting the pressure between the first gland and the rotating sleeve.

[0013] By adopting the above technical scheme, the outside pressure sensor can real-time sense the pressure between the first gland and the rotating sleeve, and transmit the pressure signal to the outside pressure display signal connected therewith, and the outside pressure display can directly display the pressure value, thereby facilitating the operator to observe. The outside adjusting member can flexibly adjust the pressure between the first gland and the rotating sleeve, thereby adjusting the clamping force between the main shaft and the first gland. During the clamping test, the pressure is adjusted by the outside adjusting member, so that the pressure value displayed by the outside pressure display reaches the required chuck clamping force.

[0014] Optionally, the inside pressure adjusting assembly comprises an inside pressure sensor, an inside adjusting member and an inside pressure display, the inside pressure sensor is signal connected with the inside pressure display, the inside pressure display is fixedly connected with the workbench, a pull rod is fixedly arranged between the first gland and the second gland, the pull rod is located in the inside of the main shaft, the inside pressure sensor is clamped between the pull rod and the first gland, and the inside adjusting member is used for adjusting the pressure between the pull rod and the first gland.

[0015] By adopting the above technical scheme, the inside pressure adjusting assembly can accurately simulate the stress condition of the main shaft when the chuck is loosened. The inside pressure sensor can accurately sense the pressure between the pull rod and the first gland, and the pressure data is real-time transmitted to the inside pressure display through the signal connection. The operator can directly observe the pressure value by means of the inside pressure display, and flexibly adjust the pressure between the pull rod and the first gland by means of the inside adjusting member. During the test, the pressure is adjusted by the inside adjusting member, so that the pressure value displayed by the outside pressure display reaches the required chuck loosening force.

[0016] Optionally, the first and second gland are provided with a plurality of dynamic balance holes at the ends away from each other.

[0017] By adopting the above technical solution, the plurality of dynamic balance holes are provided at the ends of the first and second glands away from each other, which can effectively adjust the dynamic balance of the spindle during rotation. When the spindle rotates at high speed, the accurate adjustment of the dynamic balance can reduce the vibration and noise caused by unbalanced force, reduce the wear of the spindle, and prolong the service life of the spindle. At the same time, the good dynamic balance helps to improve the rotation accuracy of the spindle, ensures the stable operation of the spindle under different speed intervals and working conditions, and thus improves the precision and quality of the lathe machining, which is suitable for batch production scenes with high machining precision requirements.

[0018] Optionally, the bracket includes a fixed arc plate, an upper arc plate and a sliding arc plate, the fixed arc plate is fixedly connected to the upper end surface of the workbench, the sliding arc plate is slidingly connected to the workbench along the axial direction of the sliding arc plate, two screw rods are fixedly arranged on the upper end surface of the fixed arc plate, the housing is located between the two screw rods, the screw rods are threadedly connected with the fastening nuts through the upper arc plate, recesses are formed in the inner walls of the fixed arc plate and the upper arc plate, the fixed flange is embedded in the two recesses, and vertical grooves are formed in the side walls of the recesses for clamping the bolts in the fixed flange.

[0019] By adopting the above technical solution, the sliding arc plate can slide along the axial direction of the sliding arc plate, and the recesses in the inner walls of the fixed arc plate and the upper arc plate and the vertical grooves in the side walls of the recesses can adapt to the fixed flange, which can improve the adaptability of the device to housings with different lengths and diameters.

[0020] In a second aspect, the application provides a lathe spindle dynamic simulation test method, which includes the following steps: S1, clamping test: used to simulate the stress condition of the spindle when the chuck is clamped, when the outer side pressure adjusting assembly adjusts the pressure value to the required chuck clamping force, the spindle is operated according to the preset speed and operation time, the internal temperature of the housing is read by the temperature detection device, and the stress relationship inside the spindle at this temperature is judged by comparing the value of the outer side pressure adjusting assembly, and then the influence of the temperature and time relationship in each speed interval on the stress condition of the whole machine and the change of the running sound is simulated; S2, loosening test: used to simulate the stress condition of the spindle when the chuck is loosened, when the inner side pressure adjusting assembly adjusts the pressure value to the required chuck loosening force, the spindle is operated according to the preset speed and operation time, the internal temperature of the housing is read by the temperature detection device, and the stress relationship inside the spindle at this temperature is judged by comparing the value of the inner side pressure adjusting assembly, and then the influence of the temperature and time relationship in each speed interval on the stress condition of the whole machine and the change of the running sound is simulated; S3, combined test: used to simulate the stress of the test spindle in the balanced force state, adjust the pressure value of the outer side pressure adjusting assembly and the inner side pressure adjusting assembly to be equal, operate the spindle according to the preset rotating speed and operating time, read the temperature inside the shell through the temperature detection device, compare the values of the outer side pressure adjusting assembly and the inner side pressure adjusting assembly at this time to judge the stress relationship inside the spindle at this temperature, and then simulate the influence of the temperature and time relationship in each rotating speed interval on the stress condition and the change of the operating sound of the whole machine.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The device does not need to install rotating oil cylinder and chuck and other accessories, reduces the test cost and installation complexity. The clamping assembly can effectively fix the spindle; the rotating assembly can make the spindle rotate stably; the support on the upper end of the workbench ensures the stability of the whole device; the temperature detection device can detect the temperature inside the shell, which is convenient for understanding the heating condition of the spindle during operation; the outer side pressure adjusting assembly can adjust the clamping force between the spindle and the first gland, and the inner side pressure adjusting assembly can adjust the loosening force between the spindle and the first gland, through these adjustments, the stress condition of the spindle in different working states can be simulated, and then whether the lathe spindle produces abnormal sound when subjected to external tension and pressure, and the axial displacement and pressure change caused by heating during rotation, and the change of the positioning accuracy of the spindle encoder can be monitored, so as to realize the quality test of the electric spindle, which is helpful to find out the problems and improve the related spindle structure, and is suitable for detecting batch production of electric spindles; 2. The first clamping piece and the second clamping piece arranged in the lathe spindle dynamic simulation device can stably clamp the shell, reducing the shaking and deviation of the spindle. The fixed flange further enhances the stability and rigidity of the device, so that the whole device can more accurately reflect the actual stress condition of the spindle during simulation test; 3. The setting of the rotating sleeve and the connecting key can make the first gland rotate synchronously with the spindle, ensuring the stability of the device during simulation of the dynamic process of the spindle, so as to more accurately simulate the dynamic condition of the spindle in actual work, and improve the accuracy and reliability of the quality test of the lathe spindle. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic diagram of a lathe spindle dynamic simulation device.

[0023] Figure 2 It is Figure 1 a cross-sectional schematic diagram.

[0024] Figure 3 It is a structure schematic diagram of the support and the fixed flange.

[0025] Figure 4 It isFigure 2 Enlarged view of part A.

[0026] Figure 5 is when the outer side pressure sensor and the inner side pressure sensor are installed simultaneously Figure 2 Enlarged view of part B.

[0027] Figure 6 is when only the outer side pressure sensor is installed Figure 2 Enlarged view of part B.

[0028] Figure 7 is when only the inner side pressure sensor is installed Figure 2 Enlarged view of part B.

[0029] Reference signs: 100, main shaft; 110, fixed ring; 1, workbench; 11, support; 111, fixed arc plate; 112, upper arc plate; 113, sliding arc plate; 114, screw rod; 115, fastening nut; 116, groove; 117, vertical slot; 2, clamping assembly 21, first gland; 211, dynamic balance hole; 22, second gland; 23, rotating sleeve; 231, through slot; 24, connecting key; 3, rotating assembly; 31, rotor; 32, stator; 33, housing; 34, first clamping member; 35, second clamping member; 36, fixed flange; 4, test assembly; 41, outer side pressure adjusting assembly; 411, outer side pressure sensor; 412, outer side adjusting member; 413, outer side pressure display; 42, inner side pressure adjusting assembly; 421, inner side pressure sensor; 422, inner side adjusting member; 423, inner side pressure display; 43, temperature detection device; 5, pull rod. DETAILED DESCRIPTION

[0030] The application will be further described in detail below with reference to all the accompanying drawings.

[0031] In a first aspect, the embodiments of the application disclose a lathe main shaft dynamic simulation device.

[0032] With reference to Figure 1 A lathe main shaft dynamic simulation device, comprising a workbench 1, a clamping assembly 2, a rotating assembly 3 and a test assembly 4. The workbench 1 is fixed with a support 11 on the upper end surface, and the support 11 is used for fixing the rotating assembly 3. The rotating assembly 3 can drive the main shaft 100 to rotate, and the clamping assembly 2 is used for clamping and fixing the two ends of the main shaft 100. The main shaft 100 rotates and the clamping assembly 2 cooperates with the test assembly 4 to test and simulate the main shaft 100 dynamically.

[0033] With reference to Figure 1 and Figure 2The clamping assembly 2 comprises a first gland 21 and a second gland 22 fixed at the two axial ends of the main shaft 100 respectively. The outer side wall of the main shaft 100 is fixed with a fixing ring 110 near the second gland 22. The fixing ring 110 is uniformly provided with a plurality of threaded holes in the circumferential direction near one end thereof, and the second gland 22 is provided with through holes corresponding to the threaded holes. The second gland 22 is fixed to the main shaft 100 by means of bolts extending into the threaded holes through the through holes. One of the threaded holes of the fixing ring 110 is threadedly connected with a positioning sleeve, one end of the positioning sleeve being located in the corresponding through hole of the second gland 22, so as to improve the convenience and efficiency of installation.

[0034] With reference to Figure 1 and Figure 2 , the first gland 21 and the second gland 22 are both provided with a plurality of dynamic balance holes 211 at the ends away from each other. The dynamic balance holes 211 are uniformly distributed in the circumferential direction. The dynamic balance holes 211 serve to ensure the dynamic balance of the main shaft 100 by adjusting the position and weight of the balance block when the main shaft 100 rotates, so as to reduce vibration and noise.

[0035] With reference to Figure 2 , the first gland 21 and the second gland 22 are fixed with a pull rod 5 inside the main shaft 100. The outer wall of both ends of the pull rod 5 is fixed with a circular ring, and the circular ring is provided with a threaded hole in the circumferential direction and is threadedly connected with the first gland 21 and the second gland 22 by means of bolts. The connection is stable and reliable, can effectively transmit tension and pressure, and is convenient for adjusting and testing pressure.

[0036] With reference to Figure 2 , the rotating assembly 3 comprises a rotor 31, a stator 32 and a housing 33 coaxially arranged outside in sequence. The rotor 31 is fixedly connected with the main shaft 100, the stator 32 is fixedly connected with the housing 33, the support 11 is fixedly connected with the outer side wall of the housing 33, and the housing 33 is rotationally connected with the main shaft 100 along the axis thereof. The stator 32 is provided with a coil inside. When the coil is supplied with current, a rotating magnetic field is generated to drive the rotor 31 to rotate, thereby driving the main shaft 100 to rotate.

[0037] With reference to Figure 1 and Figure 2The first clamping member 34 is fixed to one end of the shell 33 close to the first gland 21, and the second clamping member 35 is arranged on one side of the shell 33 close to the second gland 22. The second clamping member 35 is arranged between the shell 33 and the fixed flange 36, and the fixed flange 36 is fixedly connected with the shell 33 and the support 11. The second clamping member 35 is used for clamping the side wall of the main shaft 100, and the first clamping member 34 and the second clamping member 35 are both rotationally connected with the main shaft 100 along the axis thereof. The first clamping member 34 and the second clamping member 35 can be an elastic chuck or a hydraulic chuck. The elastic chuck has the advantages of simple structure and low cost, and the hydraulic chuck can provide greater clamping force. The fixed flange 36 is connected with the shell 33 and the support 11 by bolts to ensure the stability of the connection.

[0038] With reference to Figure 3 and Figure 4 The second clamping member 35 includes two annular rings fixedly connected by bolts, and the outer side of the fixed flange 36 is embedded between the clamping grooves arranged on the inner side walls of the two annular rings. The first clamping member 34 includes two sleeves fixedly connected by bolts, and the sleeve close to the shell 33 is fixedly connected with the shell 33 by bolts. Bearings are arranged between the first clamping member 34 and the main shaft 100, and between the shell 33, the fixed flange 36, the second clamping member 35 and the main shaft 100, so as to reduce the resistance of the rotation of the main shaft 100.

[0039] With reference to Figure 2 and Figure 5 The first clamping member 34 is provided with a rotating sleeve 23 on the side away from the shell 33. One end of the rotating sleeve 23 away from the shell 33 is fixedly connected with the first gland 21, and the other end of the rotating sleeve 23 away from the first gland 21 is inserted into the sleeve of the first clamping member 34 away from the shell 33. The end surface of the sleeve of the first clamping member 34 away from the shell 33 abuts against the rotating sleeve 23 and is rotationally connected with the rotating sleeve 23 along the axis thereof. The inner wall of the rotating sleeve 23 is provided with a through groove 231 penetrating in the axial direction, and a connecting key 24 is inserted into the through groove 231. One end of the connecting key 24 away from the through groove 231 is used for embedding in the outer wall of the main shaft 100. The rotating sleeve 23 is usually made of wear-resistant materials such as copper alloy or engineering plastic to reduce the friction between the first clamping member 34 and the rotating sleeve 23. The connecting key 24 can be a flat key or a spline. The flat key has the advantages of simple structure and easy installation, and the spline can transmit greater torque.

[0040] With reference to Figure 1 and Figure 3, the support 11 is designed as an adjustable structure to adjust to different sizes of the spindle 100 and the corresponding housing 33. The support 11 comprises a fixed arc plate 111, an upper arc plate 112 and a sliding arc plate 113, the fixed arc plate 111 is fixedly connected to the upper end face of the workbench 1, the sliding arc plate 113 is slidably connected to the workbench 1 along the axis direction of the sliding arc plate 113, and the sliding arc plate 113 is adapted to different lengths of the housing 33, so as to adapt to different sizes of the spindle 100. Two screw rods 114 are fixedly arranged on the upper end face of the fixed arc plate 111, the housing 33 is located between the two screw rods 114, and the screw rods 114 are threadedly connected with fastening nuts 115 penetrating through the upper arc plate 112. By tightening the fastening nuts 115 on the screw rods 114, the upper arc plate 112 can be pressed downward to tightly fix the fixed flange 36, so that the housing 33 is stably fixed on the support 11, and different diameters of the housing 33 are adapted, so as to adapt to different sizes of the spindle 100. The inner walls of the fixed arc plate 111 and the upper arc plate 112 are both provided with recesses 116, and the fixed flange 36 is embedded in the two recesses 116. The side walls of the recesses 116 are provided with vertical grooves 117 for clamping the bolts in the fixed flange 36.

[0041] With reference to Figure 1 and Figure 5 , the test assembly 4 comprises an outer side pressure adjusting assembly 41, an inner side pressure adjusting assembly 42 and a temperature detection device 43, the temperature detection device 43 is fixedly connected to the workbench 1, the temperature detection device 43 is used for detecting the temperature inside the housing 33, the outer side pressure adjusting assembly 41 is used for adjusting the clamping force between the spindle 100 and the first gland 21, and the inner side pressure adjusting assembly 42 is used for adjusting the loosening force between the spindle 100 and the first gland 21.

[0042] With reference to Figure 1 and Figure 5 , the outer side pressure adjusting assembly 41 comprises an outer side pressure sensor 411, an outer side adjusting member 412 and an outer side pressure display 413, the outer side pressure sensor 411 is signal connected with the outer side pressure display 413, the outer side pressure display 413 is fixedly connected to the workbench 1, the outer side pressure sensor 411 is clamped between the rotating sleeve 23 and the first gland 21, and the outer side adjusting member 412 is used for adjusting the pressure between the first gland 21 and the rotating sleeve 23. The outer side pressure sensor 411 can adopt a strain pressure sensor or a piezoresistive pressure sensor, which can convert the pressure signal into an electric signal and transmit it to the outer side pressure display 413 through a data line. The outer side adjusting member 412 can be an adjusting screw or a hydraulic adjusting device, by adjusting the outer side adjusting member 412, the pressure between the first gland 21 and the rotating sleeve 23 can be changed. When the outer side adjusting member 412 is an adjusting screw, the adjusting screw is threadedly connected with the first gland 21 and the rotating sleeve 23, by rotating the adjusting screw, the distance between the first gland 21 and the rotating sleeve 23 can be changed, so as to adjust the pressure.

[0043] Referring to Figure 1 and Figure 5 The inner side pressure adjusting assembly 42 comprises an inner side pressure sensor 421, an inner side adjusting member 422 and an inner side pressure display 423. The inner side pressure sensor 421 is in signal connection with the inner side pressure display 423. The inner side pressure display 423 is fixedly connected with the workbench 1. The inner side pressure sensor 421 is clamped between the pull rod 5 and the first gland 21. The inner side adjusting member 422 is used for adjusting the pressure between the pull rod 5 and the first gland 21. The inner side pressure sensor 421 is also a strain pressure sensor or a piezoresistive pressure sensor. The inner side adjusting member 422 can also be an adjusting screw. The threaded end of the adjusting screw is in threaded connection with the pull rod 5 through the first gland 21. By rotating the adjusting screw, the pressure between the pull rod 5 and the first gland 21 can be changed, so as to simulate the force condition of the main shaft 100 when the chuck is loosened.

[0044] The implementation principle of the lathe main shaft dynamic simulation device according to the embodiment of the application is as follows: the device does not need to be installed with rotating oil cylinders, chucks and other accessories, so that the test cost and installation complexity are reduced. The clamping assembly 2 can effectively fix the main shaft 100. The rotating assembly 3 can make the main shaft 100 stably rotate. The support 11 on the upper end surface of the workbench 1 ensures the stability of the device as a whole. The temperature detection device 43 can detect the temperature inside the shell 33, so as to facilitate understanding of the heating condition of the main shaft 100 during operation. The outer side pressure adjusting assembly 41 can adjust the clamping force between the main shaft 100 and the first gland 21. The inner side pressure adjusting assembly 42 can adjust the loosening force between the main shaft 100 and the first gland 21. Through the adjustment, the force condition of the main shaft 100 under different working conditions can be simulated, so as to verify whether the lathe main shaft 100 produces abnormal sound when subjected to external tension and pressure, and to monitor the axial displacement and pressure change of the main shaft 100 due to heating during rotation, and possibly the change of the positioning accuracy of the encoder of the main shaft 100, so as to realize the quality test of the electric main shaft 100, help to find problems and improve the structure of the main shaft 100, and be suitable for detecting the batch-produced electric main shaft 100.

[0045] On the other hand, the application discloses a lathe main shaft dynamic simulation test method, which comprises the following steps: Referring to Figure 6, S1, clamping test: used to simulate the force condition of the main shaft 100 when the chuck is clamped, when the outer side pressure adjusting assembly 41 adjusts the pressure value to the required chuck clamping force, the main shaft 100 is operated according to the preset speed and operation time, the temperature inside the shell 33 is read by the temperature detection device 43, and the force relationship inside the main shaft 100 at this temperature is judged by comparing the value of the outer side pressure adjusting assembly 41, and then the influence of the temperature and time relationship in each speed interval on the force condition of the whole machine and the change of the running sound is simulated. When the clamping test is performed, first, the outer side pressure adjusting assembly 41 is started, the outer side adjusting part 412 such as the adjusting screw is rotated, the pressure value of the outer side pressure sensor 411 is adjusted to the required chuck clamping force, and the pressure value is observed in real time through the outer side pressure display 413. Then, the main shaft 100 is started according to the preset speed and operation time, and the main shaft 100 starts to rotate. During the rotation, the temperature detection device 43 monitors the temperature inside the shell 33 in real time, and transmits the data to the controller. At the same time, the outer side pressure adjusting assembly 41 continuously monitors the pressure change, and feeds back the data to the controller. By comparing the pressure values displayed by the outer side pressure adjusting assembly 41 at different temperatures, the force relationship inside the main shaft 100 is analyzed.

[0046] With reference to Figure 7 , S2, loosening test: used to simulate the force condition of the main shaft 100 when the chuck is loosened, when the inner side pressure adjusting assembly 42 adjusts the pressure value to the required chuck loosening force, the main shaft 100 is operated according to the preset speed and operation time, the temperature inside the shell 33 is read by the temperature detection device 43, and the force relationship inside the main shaft 100 at this temperature is judged by comparing the value of the inner side pressure adjusting assembly 42, and then the influence of the temperature and time relationship in each speed interval on the force condition of the whole machine and the change of the running sound is simulated. The operation process of the loosening test is similar to that of the clamping test, first, the inner side adjusting part 422 such as the adjusting screw is rotated, the pressure value of the inner side pressure sensor 421 is adjusted to the required chuck loosening force, and the pressure value is observed in real time through the inner side pressure display 423. After adjusting the pressure of the outer side pressure adjusting assembly 41 to the appropriate state, the main shaft 100 is started according to the preset speed and operation time. During the rotation of the main shaft 100, the temperature and pressure data are obtained by the temperature detection device 43 and the inner side pressure adjusting assembly 42, and are analyzed.

[0047] With reference to Figure 5, S3, combined test: used to simulate the stress of the main shaft 100 in the balanced stress state, adjust the pressure values of the outer side pressure adjusting assembly 41 and the inner side pressure adjusting assembly 42 to be equal, operate the main shaft 100 according to the preset rotating speed and operating time, read the temperature inside the shell 33 through the temperature detecting device 43, compare the values of the outer side pressure adjusting assembly 41 and the inner side pressure adjusting assembly 42 at this time to judge the stress relationship inside the main shaft 100 at this temperature, and further simulate the influence of the temperature and time relationship in each rotating speed interval on the stress condition of the whole machine and the change of the operating sound. In the combined test, the outer side adjusting part 412 and the inner side adjusting part 422 are rotated at the same time, so that the pressure values displayed by the outer side pressure display 413 and the inner side pressure display 423 are equal. Then the main shaft 100 is started and the rotating test is carried out. In the test process, the data of the temperature detecting device 43, the outer side pressure adjusting assembly 41 and the inner side pressure adjusting assembly 42 are comprehensively analyzed to judge the performance of the main shaft 100 in the balanced stress state.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dynamic simulation device for a lathe spindle, comprising a worktable (1), a clamping assembly (2), a rotating assembly (3), and a testing assembly (4), characterized in that: The clamping assembly (2) includes a first pressure plate (21) and a second pressure plate (22) respectively fixed at both ends of the spindle (100) along the axial direction. The rotating assembly (3) includes a rotor (31), a stator (32) and a housing (33) arranged coaxially with the spindle (100) and arranged in sequence. The rotor (31) is fixedly connected to the spindle (100), and the stator (32) is fixedly connected to the housing (33). A bracket (11) is fixedly provided on the upper surface of the worktable (1). The bracket (11) is fixedly connected to the outer wall of the housing (33). The housing (33) rotates along its own axis. The wire is rotatably connected to the spindle (100). The test assembly (4) includes an outer pressure adjustment assembly (41), an inner pressure adjustment assembly (42), and a temperature detection device (43). The temperature detection device (43) is fixedly connected to the worktable (1). The temperature detection device (43) is used to detect the internal temperature of the housing (33). The outer pressure adjustment assembly (41) is used to adjust the clamping force between the spindle (100) and the first pressure cover (21). The inner pressure adjustment assembly (42) is used to adjust the loosening force between the spindle (100) and the first pressure cover (21).

2. The lathe spindle dynamic simulation device according to claim 1, characterized in that: The housing (33) is fixedly provided with a first clamping member (34) at one end near the first pressure cover (21), and a second clamping member (35) is provided on the side of the housing (33) near the second pressure cover (22). A fixed flange (36) is provided between the second clamping member (35) and the housing (33). The fixed flange (36) is fixedly connected to the housing (33) and to the bracket (11). The second clamping member (35) is used to clamp the side wall of the main shaft (100). The first clamping member (34) and the second clamping member (35) are both rotatably connected to the main shaft (100) along their own axis.

3. The lathe spindle dynamic simulation device according to claim 2, characterized in that: The first clamping member (34) has a rotating sleeve (23) on the side away from the housing (33). The end of the rotating sleeve (23) away from the housing (33) is fixedly connected to the first pressure cover (21). The end of the rotating sleeve (23) away from the first pressure cover (21) is inserted into the first clamping member (34). The end face of the first clamping member (34) abuts against the rotating sleeve (23) and the two are rotatably connected along their own axis. The inner wall of the rotating sleeve (23) has a through groove (231) that runs through the axis. A connecting key (24) is inserted in the through groove (231). The end of the connecting key (24) away from the through groove (231) is used to be embedded in the outer wall of the main shaft (100).

4. The lathe spindle dynamic simulation device according to claim 3, characterized in that: The outer pressure regulating assembly (41) includes an outer pressure sensor (411), an outer adjusting member (412), and an outer pressure display (413). The outer pressure sensor (411) is connected to the outer pressure display (413) via signal. The outer pressure display (413) is fixedly connected to the worktable (1). The outer pressure sensor (411) is sandwiched between the rotating sleeve (23) and the first pressure cap (21). The outer adjusting member (412) is used to adjust the pressure between the first pressure cap (21) and the rotating sleeve (23).

5. The lathe spindle dynamic simulation device according to claim 1, characterized in that: The inner pressure adjustment assembly (42) includes an inner pressure sensor (421), an inner adjustment component (422), and an inner pressure display (423). The inner pressure sensor (421) is connected to the inner pressure display (423) via signal. The inner pressure display (423) is fixedly connected to the worktable (1). A pull rod (5) is fixed between the first pressure cover (21) and the second pressure cover (22). The pull rod (5) is located inside the spindle (100). The inner pressure sensor (421) is clamped between the pull rod (5) and the first pressure cover (21). The inner adjustment component (422) is used to adjust the pressure between the pull rod (5) and the first pressure cover (21).

6. The lathe spindle dynamic simulation device according to claim 1, characterized in that: Both the first pressure cap (21) and the second pressure cap (22) have several dynamic balancing holes (211) at their ends that are far apart from each other.

7. The lathe spindle dynamic simulation device according to claim 2, characterized in that: The bracket (11) includes a fixed arc plate (111), an upper arc plate (112), and a sliding arc plate (113). The fixed arc plate (111) is fixedly connected to the upper end face of the workbench (1), and the sliding arc plate (113) is slidably connected to the workbench (1) along its own axis. Two screws (114) are fixedly provided on the upper end face of the fixed arc plate (111). The housing (33) is located between the two screws (114). The screws (114) pass through the upper arc plate (112) and are threadedly connected to a fastening nut (115). The inner walls of the fixed arc plate (111) and the upper arc plate (112) are both provided with grooves (116). The fixed flange (36) is embedded in the two grooves (116). The side wall of the groove (116) is provided with a vertical groove (117). The vertical groove (117) is used for the bolts in the fixed flange (36) to be inserted.

8. A method for dynamic simulation testing of a lathe spindle, applied to a dynamic simulation device for a lathe spindle as described in any one of claims 1-7, characterized in that, Includes the following steps: S1, Clamping test: This test is used to simulate the force on the spindle (100) when it is clamped by the chuck. When the pressure value of the outer pressure adjustment component (41) is adjusted to the required chuck clamping force, the spindle (100) is operated according to the preset speed and running time. The internal temperature of the housing (33) is read by the temperature detection device (43). The value of the outer pressure adjustment component (41) at this time is compared to determine the internal force relationship of the spindle (100) at this temperature. In this way, the influence of the temperature and time relationship in each speed range on the force and running sound of the whole machine is simulated. S2, Release Test: This test simulates the force on the spindle (100) when the chuck is released. When the pressure value of the inner pressure adjustment component (42) is adjusted to the required chuck release force, the spindle (100) is run according to the preset speed and running time. The internal temperature of the housing (33) is read by the temperature detection device (43). The internal force relationship of the spindle (100) at this temperature is judged by comparing the value of the inner pressure adjustment component (42) at this time. In this way, the influence of the temperature and time relationship in each speed range on the force and running sound of the whole machine is simulated. S3, Joint Test: Used to simulate the stress condition of the spindle (100) under balanced force. When the pressure values ​​of the outer pressure adjustment component (41) and the inner pressure adjustment component (42) are equal, the spindle (100) is run according to the preset speed and running time. The internal temperature of the housing (33) is read by the temperature detection device (43). The values ​​of the outer pressure adjustment component (41) and the inner pressure adjustment component (42) are compared to determine the internal force relationship of the spindle (100) at this temperature. Then, the influence of the temperature and time relationship in each speed range on the stress condition and running sound of the whole machine is simulated.

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