Vibration suppression optimization method and system for high-rigidity gantry machine tool spindle

Abstract

The application discloses a vibration suppression optimization method and system for a high-rigidity gantry machine tool spindle, and relates to the technical field of data processing. The method comprises the following steps: performing structural optimization preprocessing on the spindle of the gantry machine tool according to a spindle optimization mechanism to obtain a target spindle; activating a distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle to obtain real-time temperature information; when the real-time temperature information reaches a predetermined intervention constraint, starting a circulating oil cooler to perform emergency cooling processing on the target spindle, synchronously generating an axial deformation correction decision, and calculating a real-time axial compensation amount to suppress vibration of the target spindle. The application solves the technical problem that the axial deformation and vibration of the spindle caused by temperature rise in the prior art during high-speed cutting, which leads to a decrease in machining precision and instability of the machine tool, and achieves the technical effect of effectively reducing deformation caused by temperature and suppressing vibration of the spindle, thereby improving the machining precision and stability of the machine tool.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data processing, in particular to a vibration suppression optimization method and system for a high-rigidity gantry machine tool spindle. BACKGROUND

[0002] With the development of machining technology, gantry machine tools are widely used in the machining of large workpieces due to their high rigidity and high precision. The spindle, as the core component of the machine tool, bears the responsibility of transmitting torque and driving the cutter for machining. However, under the working conditions of high-speed cutting and high load, the spindle is easily affected by factors such as temperature change and vibration, leading to spindle deformation and machining precision decline. Temperature rise usually causes thermal expansion of the spindle, which in turn causes axial deformation, further exacerbating vibration and instability. Traditional spindle vibration suppression methods usually rely on increasing spindle rigidity or using damping materials, but these methods cannot respond to temperature changes and dynamic vibrations in real time, and cannot fundamentally solve the problem of axial deformation caused by temperature changes. SUMMARY

[0003] The present application provides a vibration suppression optimization method and system for a high-rigidity gantry machine tool spindle, which solves the technical problem of axial deformation and vibration of the spindle caused by temperature rise during high-speed cutting in the prior art, leading to machining precision decline and machine tool instability.

[0004] In a first aspect of the present application, a vibration suppression optimization method for a high-rigidity gantry machine tool spindle is provided, the method comprising: performing structural optimization preprocessing on the spindle of the gantry machine tool according to a spindle optimization mechanism to obtain a target spindle; activating a distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle to obtain real-time temperature information; when the real-time temperature information reaches a predetermined intervention constraint, starting a circulating oil cooler to perform emergency cooling processing on the target spindle, and simultaneously generating an axial deformation correction decision; and performing vibration suppression on the target spindle according to a real-time axial compensation amount calculated based on the axial deformation correction decision.

[0005] In a second aspect of the present application, a vibration suppression optimization system for a high-rigidity gantry machine tool spindle is provided, the system comprising: a structural optimization preprocessing module for performing structural optimization preprocessing on the spindle of the gantry machine tool according to a spindle optimization mechanism to obtain a target spindle; a dynamic temperature monitoring module for activating a distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle to obtain real-time temperature information; an emergency cooling processing module for starting a circulating oil cooler to perform emergency cooling processing on the target spindle when the real-time temperature information reaches a predetermined intervention constraint, and simultaneously generating an axial deformation correction decision; and a vibration suppression module for performing vibration suppression on the target spindle according to a real-time axial compensation amount calculated based on the axial deformation correction decision.

[0006] The one or more technical solutions provided in the application have at least the following technical effects or advantages:

[0007] The vibration suppression optimization method and system of the high-rigidity gantry machine tool spindle provided by the application relate to the technical field of data processing. The spindle rigidity is improved through structural optimization preprocessing. The temperature is monitored in real time by using a distributed temperature detector, and emergency treatment is performed in combination with a cooling system. The compensation amount is calculated according to the axial deformation correction decision to suppress vibration. Meanwhile, an electromagnetic active vibration suppressor is introduced to actively suppress the tool holder, so that the vibration of the spindle is accurately suppressed. The technical problems of axial deformation and vibration caused by temperature rise of the spindle in the high-speed cutting process in the prior art, which leads to the decline of machining precision and the instability of the machine tool, are solved. The technical effects of effectively reducing the deformation caused by temperature and suppressing the vibration of the spindle are achieved by real-time temperature monitoring, emergency cooling and axial compensation, so as to improve the machining precision and stability of the machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application. For those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0009] Figure 1 The vibration suppression optimization method flowchart of the high-rigidity gantry machine tool spindle provided by the embodiment of the application is shown in the figure.

[0010] Figure 2 The vibration suppression optimization system structure diagram of the high-rigidity gantry machine tool spindle provided by the embodiment of the application is shown in the figure.

[0011] Explanation of reference signs: structural optimization preprocessing module 11, dynamic temperature monitoring module 12, emergency cooling processing module 13, vibration suppression module 14. DETAILED DESCRIPTION

[0012] The vibration suppression optimization method and system of the high-rigidity gantry machine tool spindle provided by the application are used to solve the technical problems of axial deformation and vibration caused by temperature rise of the spindle in the high-speed cutting process in the prior art, which leads to the decline of machining precision and the instability of the machine tool.

[0013] The technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0014] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or modules not clearly listed or inherent to these processes, methods, products or devices.

[0015] Embodiment one, as shown in the present application provides a vibration suppression optimization method for high rigidity gantry machine tool spindle, which comprises: Figure 1

[0016] P10: structure optimization preprocessing of the spindle of the gantry machine tool according to the spindle optimization mechanism, to obtain the target spindle. The spindle optimization mechanism includes torque transmission strategy, oil groove lubrication strategy and dither elimination strategy; wherein the torque transmission strategy refers to using a predetermined carbon coupling to connect the transition shaft of the spindle and the gantry machine tool with interference fit processing, and the predetermined carbon coupling adopts a high torsional rigidity carbon fiber sheet group structure, the axial stiffness is greater than or equal to 3.12x10 5 N / mm, the radial stiffness is greater than or equal to 1.88x10 6 N / mm, and the transmission torque is greater than or equal to 1700 N·m; wherein the oil groove lubrication strategy refers to the paste molding processing of the guide rail of the external slide structure of the spindle, and the thickness of the fluororesin soft belt of the paste guide rail is greater than or equal to 0.5 millimeter, and the lubricating oil groove is provided, and the friction coefficient of the paste surface of the guide rail is less than or equal to 0.05; wherein the dither elimination strategy refers to the screw counterweight processing of the predetermined double-end-face screw hole of the spindle.

[0017] It should be understood that the spindle of the gantry machine tool is first improved by structure optimization preprocessing to improve its rigidity, stability and vibration suppression capability, so as to improve the overall performance of the machine tool. The spindle optimization mechanism includes torque transmission strategy, oil groove lubrication strategy and dither elimination strategy. In order to ensure the effective implementation of these strategies, the spindle needs to be precisely machined and modified.

[0018] ​Firstly, the torque transmission strategy is an important part of the spindle optimization mechanism. In this strategy, a predetermined carbon coupling is used to connect the spindle and the transition shaft of the gantry machine tool with an interference fit. This connection ensures a tight connection between the spindle and the transition shaft, achieving efficient and stable torque transmission. The predetermined carbon coupling uses a high torsional rigidity carbon fiber sheet group structure, which has significant advantages. Its axial stiffness is greater than or equal to 3.12×10 5 N / mm, and its radial stiffness is greater than or equal to 1.88×10 6 N / mm, which means that the coupling can maintain a stable connection state under the condition of bearing large axial and radial forces, reducing deformation or vibration caused by insufficient rigidity. At the same time, its transmission torque is greater than or equal to 1700 N·m, which can meet the demand of high-rigidity gantry machine tools for large torque transmission during processing, ensuring the stable operation of the spindle under high load working conditions.

[0019] The oil groove lubrication strategy mainly reduces friction and wear by using a fluororesin soft belt to paste the guide rail of the externally mounted ram structure of the spindle. Specifically, the fluororesin soft belt has a thickness greater than or equal to 0.5 mm. The fluororesin soft belt has good wear resistance and self-lubricating properties, which can effectively reduce the friction coefficient of the guide rail during movement. Lubricating oil grooves are set on the guide rail to further optimize the lubrication effect. Through this design, the friction coefficient of the guide rail pasting surface can be controlled within a range of less than or equal to 0.05. Low friction coefficient means that the movement of the spindle during processing is smoother, which can reduce heat generation and energy loss caused by friction, thereby reducing the risk of thermal deformation of the spindle and improving processing precision and surface quality.

[0020] In order to effectively eliminate the vibration and jitter caused by the rotation of the spindle, the jitter elimination strategy is also adopted. This strategy is achieved by screwing weights to the predetermined double-end screw holes of the spindle. In actual processing, the spindle may produce jitter due to various factors, which will adversely affect the processing precision. By screwing weights, the center of gravity of the spindle can be adjusted to make it more stable during operation, thereby effectively eliminating the jitter phenomenon. This treatment can significantly improve the dynamic performance of the spindle, ensuring stable operation during high-precision processing and further improving processing quality.

[0021] These strategies work together to optimize the spindle from torque transmission, lubrication performance, and dynamic stability, making it have higher rigidity, lower friction coefficient, and better running stability, thereby better meeting the needs of high-rigidity gantry machine tools in high-precision processing.

[0022] P20: activate the distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle, and obtain real-time temperature information. Wherein, the distributed temperature detector is arranged at the predetermined point of the target spindle, and the predetermined point at least includes the front bearing outer ring, the middle part of the spindle box and the motor connection.

[0023] Specifically, in order to realize the accurate vibration suppression optimization of the target spindle, it is necessary to first activate the distributed temperature detector to perform dynamic and continuous temperature monitoring on the spindle, so as to obtain real-time temperature information. In this way, the real-time tracking of the temperature change of the spindle during operation is realized, thereby providing a basis for subsequent temperature management and vibration suppression. Moreover, in order to ensure the accuracy and comprehensiveness of the temperature data, the distributed temperature detector is arranged at multiple key positions of the target spindle, including the front bearing outer ring, the middle part of the spindle box and the motor connection and other predetermined points.

[0024] Among them, the front bearing outer ring is a part that bears a large load and temperature change during the operation of the spindle. Therefore, by installing a temperature detector at this position, the temperature change of the bearing can be monitored in real time, and possible overheating phenomena can be found in time, so as to avoid the problems of bearing damage or unstable operation caused by high temperature. Secondly, the middle part of the spindle box is one of the core parts of the spindle, which is usually a heat concentration area. By arranging the distributed temperature detector at this position, the temperature distribution inside the spindle box can be obtained in real time, providing an important reference for overall temperature monitoring. The high temperature inside the spindle box may cause the spindle to deform, lubrication to be poor, etc., thereby affecting the machining precision and the running stability of the machine tool. Finally, the motor connection is an important position where the spindle is connected with the driving system. During the machining process, the heat of the motor will be transferred to the spindle through the connection, causing the temperature of this part to rise. Therefore, monitoring the temperature at this position can help to judge the heat transfer between the motor and the spindle. By monitoring the temperature at the motor connection, it is possible to prevent the problems of unstable power output or damage caused by overheating of the motor.

[0025] By arranging the distributed temperature detector at these key positions, comprehensive temperature monitoring of the target spindle can be realized, ensuring real-time feedback of temperature information, and providing data support for subsequent cooling control, vibration suppression and overall spindle performance optimization.

[0026] P30: when the real-time temperature information reaches the predetermined intervention constraint, start the circulating oil cooler to perform emergency cooling treatment on the target spindle, and generate an axial deformation correction decision synchronously.

[0027] Further, the real-time temperature information includes the temperature value of the predetermined point, and when the real-time temperature information reaches the predetermined intervention constraint, the circulating oil cooler is started to perform emergency cooling treatment on the target spindle. The step P30 of the embodiment of the application further comprises:

[0028] P31: Extract any temperature value corresponding to any point in the real-time temperature information; P32: Determine whether the any temperature value reaches any predetermined threshold value of the any point in the predetermined intervention constraint; P33: If yes, it is proved that the real-time temperature information reaches the predetermined intervention constraint, and the emergency cooling process of the target spindle is started by the circulating oil cooler; wherein the cooling oil in the circulating oil cooler performs emergency cooling process on the target spindle with predetermined cooling parameters, and the predetermined cooling parameters include flow greater than or equal to 10 L / min, oil pressure 3 MPa.

[0029] Optionally, for the temperature monitoring and control process of the gantry machine tool spindle, the temperatures of each predetermined point of the spindle, that is, the key parts, are monitored in real time by the distributed temperature detector, and dynamic temperature control is performed according to these temperature information. When the monitored temperature information reaches the predetermined intervention constraint, the system will start the emergency cooling program to ensure that the spindle can operate stably under high temperature and avoid mechanical damage or performance degradation caused by overheating.

[0030] Firstly, the temperature value of any point in the real-time temperature information is extracted. These points at least include the key parts such as the front bearing outer ring, the middle part of the spindle box and the motor connection, that is, the areas with large temperature change. Extracting the real-time temperature values of these points helps to fully understand the temperature state of the spindle at different parts and ensures the comprehensiveness and accuracy of the monitoring data.

[0031] Then, compare the extracted any temperature value with the predetermined threshold value of the point in the predetermined intervention constraint. The predetermined intervention constraint is a temperature threshold value preset according to the material characteristics of the spindle, the processing technology requirements and the safety operation standard, which is used to judge whether the spindle is within the safe temperature range. Through these threshold values, it can be determined whether the current temperature has reached the critical value, that is, whether it has exceeded the safe working temperature range. If the temperature of any point exceeds its predetermined threshold value, the system considers that the temperature of the spindle has reached the standard that needs to start cooling.

[0032] That is, if the temperature value reaches the predetermined threshold value, it is confirmed that the real-time temperature information has reached the requirements of the predetermined intervention constraint, and the system will immediately start the circulating oil cooler to perform emergency cooling process on the spindle. At this time, the system will start the circulating cooling process of the cooling oil according to the predetermined cooling parameters. Specifically, in the circulating oil cooler, the flow of the cooling oil needs to be greater than or equal to 10 L / min to ensure that enough cooling oil flow can quickly take away the excess heat of the spindle in a short time. At the same time, the oil pressure of the cooling oil is set to 3 MPa to ensure that the cooling oil can flow through the surface of the spindle with high pressure, so that the oil and the surface of the spindle are in full contact, quickly taking away the heat from the surface of the spindle and reducing its temperature.

[0033] The cooling process is not only to reduce the temperature, but more importantly, to prevent the spindle from deformation or other failures caused by overheating. Through the efficient cooling of the circulating oil cooler, the temperature of the spindle can be timely controlled within a safe range, avoiding the problems of precision decline, bearing damage or spindle instability caused by high temperature, thereby ensuring the stability and machining precision of the machine tool.

[0034] At the same time, the generation of the axial deformation correction decision is synchronized. The spindle may expand at high temperature, causing its axial deformation, which may affect the working precision of the spindle and the machining quality of the overall machine tool. In order to solve this problem, the axial deformation amount that the spindle may occur is calculated according to the real-time temperature information and temperature change trend, combined with the structural characteristics of the spindle, and based on this deformation amount, the corresponding axial deformation correction decision is generated. The specific content of the axial deformation correction decision can include fine-tuning the feed position of the spindle, changing the machining parameters or adjusting the support structure of the spindle, etc., so as to compensate for the axial deformation caused by temperature change, thereby reducing the vibration of the spindle and ensuring the stability and machining precision of the machining process.

[0035] Through the synergistic effect of the two steps of cooling and axial deformation correction, not only the spindle temperature can be effectively reduced to prevent deformation caused by overheating, but also the axial deformation of the spindle can be compensated in time, thereby maximizing the maintenance of the machining precision and stability of the machine tool.

[0036] P40: According to the real-time axial compensation amount calculated based on the axial deformation correction decision, the vibration of the target spindle is suppressed.

[0037] Further, according to the real-time axial compensation amount calculated based on the axial deformation correction decision, the step P40 of the embodiments of the present application further comprises:

[0038] P41: obtaining the real-time environmental temperature of the target spindle; P42: sequentially traversing the first temperature value of the outer ring of the front bearing, the second temperature value of the middle part of the spindle box and the third temperature value of the motor connection in the real-time temperature information; P43: respectively calculating the first temperature difference between the first temperature value and the real-time environmental temperature, the second temperature difference between the second temperature value and the real-time environmental temperature, and the third temperature difference between the third temperature value and the real-time environmental temperature; P44: retrieving the predetermined compensation coefficient to weight the first temperature difference, the second temperature difference and the third temperature difference, and obtaining the real-time axial compensation amount.

[0039] Optionally, according to the real-time axial compensation amount calculated based on the axial deformation correction decision, the vibration of the target spindle is suppressed, so as to maximize the guarantee of the precision and stability of the spindle in the running process.

[0040] First, when the real-time temperature information shows that the temperature value of any predetermined point of the target spindle reaches or exceeds the predetermined intervention constraint, the real-time ambient temperature of the target spindle is obtained. The change of the ambient temperature will directly affect the working state of the spindle, therefore, accurately measuring and obtaining the current ambient temperature is an important prerequisite to ensure the effectiveness of subsequent compensation and vibration suppression.

[0041] Next, the first temperature value of the front bearing outer ring, the second temperature value of the middle part of the spindle box, and the third temperature value of the motor connection are obtained by traversing the real-time temperature information in sequence. These temperature values reflect the actual temperature state of the spindle at key positions, and are important data for evaluating the thermal deformation of the spindle.

[0042] Next, the first temperature difference between the first temperature value and the real-time ambient temperature, the second temperature difference between the second temperature value and the real-time ambient temperature, and the third temperature difference between the third temperature value and the real-time ambient temperature are calculated respectively. These temperature difference values reflect the degree of thermal change of each key part of the spindle relative to the ambient temperature, and are important basis for calculating the axial compensation amount. Through these temperature difference values, the system can more accurately evaluate the thermal deformation of the spindle.

[0043] Finally, the predetermined compensation coefficient is called to perform weighted calculation on the first temperature difference, the second temperature difference, and the third temperature difference to obtain the real-time axial compensation amount. The predetermined compensation coefficient is pre-set according to the material properties, structural design, and processing process requirements of the spindle, and is used to ensure the scientificity and effectiveness of the compensation amount. Through weighted calculation, the real-time axial compensation amount is obtained, which will be used for accurate vibration suppression adjustment of the target spindle.

[0044] Based on the real-time axial compensation amount obtained by the above calculation, the vibration suppression of the target spindle is performed, including adjusting the feed position of the spindle, changing the processing parameters, or adjusting the support structure of the spindle, etc. Through these adjustments, the axial deformation caused by temperature change can be effectively compensated, the vibration of the spindle can be reduced, and the stability and processing precision of the machining process can be ensured.

[0045] Further, the vibration suppression of the target spindle comprises the following steps:

[0046] P45: activating the electromagnetic active vibration suppressor, and actively suppressing the tool holder of the target spindle through the electromagnetic active vibration suppressor, wherein the electromagnetic active vibration suppressor comprises a displacement sensor group and a PD controller; P46: dynamically monitoring the vibration signal of the tool holder through the displacement sensor group; P47: converting and processing the vibration signal through the PD controller to obtain an electromagnetic vibration suppression force, wherein the electromagnetic vibration suppression force is used to actively suppress the tool holder.

[0047] Specifically, the vibration suppression measures for the target spindle can be further expanded by activating the electromagnetic active vibration suppressor and using it to actively suppress the vibration of the spindle holder, thereby further improving the vibration suppression effect.

[0048] Specifically, first activate the electromagnetic active vibration suppressor, which controls the vibration of the spindle holder by adjusting the electromagnetic force. The electromagnetic active vibration suppressor consists of a displacement sensor group and a PD controller, with high-precision vibration suppression capability. The displacement sensor group is responsible for monitoring the vibration state of the holder, while the PD controller performs real-time calculation and adjustment according to the sensor feedback signal, thereby generating an electromagnetic vibration suppression force opposite to the vibration for actively suppressing the vibration.

[0049] The displacement sensor group is installed at the holder part of the target spindle, which functions to monitor the vibration of the holder in real time and dynamically during the machining process. These sensors can capture the small displacement changes of the holder with high precision and high frequency, thereby generating detailed vibration signals. The vibration signals contain displacement data in different directions of the holder, which can reflect the vibration state of the holder during the machining process due to various factors such as cutting force, thermal deformation, etc. Through the monitoring of the displacement sensor group, the vibration characteristics of the holder can be obtained in real time, providing accurate input data for subsequent active vibration suppression.

[0050] After obtaining the vibration signals of the holder, these signals are transmitted to the PD controller. The PD controller calculates the size and direction of the required electromagnetic vibration suppression force according to the preset control algorithm, combined with the vibration frequency, amplitude and other characteristics of the holder. This process is carried out in real time to ensure that the electromagnetic vibration suppression force can timely offset the vibration of the holder. The introduction of the PD controller enables the system to quickly respond to the vibration changes of the holder, and the electromagnetic vibration suppression force is applied to the holder, thereby reducing the vibration amplitude of the holder, further reducing the vibration level of the spindle system, and improving the stability and machining precision of the machining process.

[0051] Through the dynamic monitoring of the displacement sensor group and the accurate processing of the PD controller, the system can monitor the vibration state of the holder in real time and quickly generate the corresponding electromagnetic vibration suppression force, thereby effectively suppressing the vibration of the holder.

[0052] Further, after the vibration of the target spindle is suppressed according to the real-time axial compensation amount calculated based on the axial deformation correction decision, the step P40 of the embodiment of the present application further includes:

[0053] P48: Real-time cutting parameters are obtained based on dynamic monitoring of predetermined cutting indices; P49: The real-time cutting parameters are compared with the predetermined cutting parameters to obtain a real-time cutting deviation index; P410: If the real-time cutting deviation index reaches a predetermined deviation limit, a cutting optimization signal is issued, and the real-time cutting parameters are dynamically adjusted based on the cutting optimization signal; wherein, the predetermined cutting indices include cutting speed, feed per tooth, and axial depth of cut.

[0054] In one possible embodiment of this application, after vibration suppression of the target spindle, the accuracy and stability of the machining process can be further ensured through a series of cutting process monitoring and optimization operations.

[0055] First, real-time cutting parameters are obtained through dynamic monitoring of predetermined cutting indices, which mainly include cutting speed, feed per tooth, and axial depth of cut. High-precision sensors and monitoring equipment enable the real-time acquisition of the current values ​​of these key cutting parameters, ensuring comprehensive monitoring of the machining process.

[0056] Next, the real-time cutting parameters are compared with the predetermined cutting parameters to obtain the real-time cutting deviation index. The predetermined cutting parameters are optimal parameters set in advance according to the machining process requirements and machine tool performance to ensure the stability and quality of the machining process. By comparing the parameters, the deviation between the current cutting parameters and the predetermined parameters can be quantified, thereby assessing whether the machining process is in an ideal state. If the deviation index is large, it means that there may be unstable factors in the cutting process, affecting the machining quality.

[0057] If the real-time cutting deviation index reaches the predetermined deviation limit, it indicates that the current cutting parameters have deviated from the allowable range, and the system will issue a cutting optimization signal. The predetermined deviation limit is set according to the tolerance range of the machining process and is used to determine whether the cutting parameters have deviated from the allowable range. When the real-time cutting deviation index exceeds the predetermined deviation limit, the system will dynamically adjust the real-time cutting parameters based on the cutting optimization signal, including adjusting the cutting speed, changing the feed per tooth, or optimizing the axial depth of cut, to ensure that the cutting parameters return to the predetermined range, thereby maintaining the stability of the machining process and the machining quality.

[0058] This dynamic monitoring and optimization mechanism enables real-time adjustment of cutting parameters, ensuring that the machining process is always in optimal condition, thereby further improving the stability and accuracy of the machining process.

[0059] Furthermore, step P49 in the embodiments of this application also includes:

[0060] P49-1: obtaining historical cutting operation records of the gantry machine tool of the same type; P49-2: obtaining a first cutting data set according to the historical cutting operation records, wherein the first cutting data set comprises first cutting control parameters and first cutting effect parameters; P49-3: when a first cutting fitness obtained by analyzing the first cutting effect parameters reaches a predetermined fitness limit value, taking the first cutting control parameters as the predetermined cutting parameters; wherein it comprises: performing mutation weighting calculation on a first vibration kurtosis value and a first surface roughness in the first cutting effect parameters to obtain the first cutting fitness.

[0061] Optionally, to further optimize the cutting process, analysis and application of historical cutting operation records can be increased to further improve the setting of real-time cutting parameters, ensuring that the machining process is more accurate and efficient.

[0062] Firstly, historical cutting operation records of the gantry machine tool of the same type are obtained. These records contain detailed data of similar machine tools in previous cutting operations under similar machining conditions, providing a reference for the optimization of cutting parameters for the current machine tool. Based on these historical cutting operation records, a first cutting data set is generated, which includes first cutting control parameters and first cutting effect parameters. The first cutting control parameters refer to the cutting parameters actually used in the historical operation, such as cutting speed, feed per tooth, and axial cutting depth, etc. The first cutting effect parameters refer to the effects produced by these cutting parameters in actual machining, such as machining surface quality, vibration condition, etc.

[0063] Then, the first cutting effect parameters are analyzed, and whether the first cutting fitness calculated reaches a predetermined fitness limit value. The fitness limit value is a standard value preset according to historical data and theoretical analysis, reflecting the stability and quality of the cutting operation. The calculation process of the first cutting fitness includes mutation weighting calculation on the first vibration kurtosis value and the first surface roughness in the first cutting effect parameters. Among them, the vibration kurtosis value reflects the intensity and variation characteristics of vibration in the cutting process, and the surface roughness directly affects the surface quality of the workpiece. Through mutation weighting calculation, the adaptability of the cutting operation can be evaluated according to the degree of change and importance of these parameters, and the first cutting fitness is obtained. If the first cutting fitness reaches the predetermined fitness limit value, the first cutting control parameters are taken as the new predetermined cutting parameters, which are used for subsequent comparison and optimization of real-time cutting parameters to optimize the current cutting process.

[0064] Through the above steps, the successful experience in the historical data can be used to optimize the setting of real-time cutting parameters, ensuring that the cutting process not only meets the predetermined process requirements, but also minimizes the vibration, surface quality problems and other problems caused by inappropriate cutting conditions, thereby improving the machining precision and efficiency.

[0065] In summary, the embodiments of the present application have at least the following technical effects:

[0066] The present application avoids thermal expansion and axial deformation of the spindle due to overheating through real-time temperature monitoring and emergency cooling processing, thereby improving the stability of the spindle; through dynamic axial compensation and vibration suppression technology, the vibration of the spindle is effectively suppressed, the influence of vibration on machining precision is reduced, and the high stability of the machining process is ensured; by adjusting and optimizing the running state of the spindle in real time, the machining precision and surface quality are improved; by reducing thermal deformation and vibration caused by temperature, the wear of the spindle and other key components is reduced, and the service life of the machine tool is prolonged; combined with automatic adjustment of temperature monitoring, cooling system and compensation decision, intelligent optimization of machine tool machining process is realized, and the overall machining efficiency and quality are improved.

[0067] The technical effects of reducing deformation caused by temperature, suppressing spindle vibration, and improving machining precision and stability of the machine tool are achieved through real-time temperature monitoring, emergency cooling and axial compensation.

[0068] Embodiment two, based on the same inventive concept as the vibration suppression optimization method of the high-rigidity gantry machine tool spindle in the foregoing embodiments, as shown in Figure 2 The present application provides a vibration suppression optimization system for a high-rigidity gantry machine tool spindle, and the system and method embodiments in the present application are based on the same inventive concept. The system comprises:

[0069] The structure optimization preprocessing module 11 is configured to perform structure optimization preprocessing on the spindle of the gantry machine tool according to the spindle optimization mechanism, and obtain a target spindle.

[0070] The dynamic temperature monitoring module 12 is configured to activate the distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle, and obtain real-time temperature information.

[0071] The emergency cooling processing module 13 is configured to start the circulating oil cooler to perform emergency cooling processing on the target spindle when the real-time temperature information reaches a predetermined intervention constraint, and simultaneously generate an axial deformation correction decision.

[0072] The vibration suppression module 14 is configured to perform vibration suppression on the target spindle according to a real-time axial compensation amount calculated based on the axial deformation correction decision.

[0073] Further, in the structure optimization preprocessing module 11:

[0074] The main shaft optimization mechanism includes a torque transmission strategy, an oil groove lubrication strategy and a dithering elimination strategy; wherein the torque transmission strategy refers to using a predetermined carbon coupling to perform interference fit connection processing on the transition shaft of the main shaft and the gantry machine tool, and the predetermined carbon coupling adopts a high torsional rigidity carbon fiber sheet group structure, the axial rigidity is greater than or equal to 3.12*10 5 N / mm, the radial rigidity is greater than or equal to 1.88*10 6 N / mm, and the transmission torque is greater than or equal to 1700 N·m; wherein the oil groove lubrication strategy refers to performing plastic bonding processing on the guide rail of the externally hung ram structure of the main shaft, and the thickness of the fluororesin soft belt of the plastic bonded guide rail is greater than or equal to 0.5 millimeters, and a lubricating oil groove is provided, and the friction coefficient of the plastic bonded surface of the guide rail is less than or equal to 0.05; wherein the dithering elimination strategy refers to screw weight processing on the predetermined double-end-face screw hole of the main shaft.

[0075] Further, in the dynamic temperature monitoring module 12:

[0076] The distributed temperature measuring device is arranged at a predetermined point of the target main shaft, and the predetermined point at least includes a front bearing outer ring, a main shaft box middle part and a motor connection part.

[0077] Further, in the dynamic temperature monitoring module 12:

[0078] The real-time temperature information includes the temperature value of the predetermined point, and when the real-time temperature information reaches the predetermined intervention constraint, a circulating oil cooler is started to perform emergency cooling processing on the target main shaft, including:

[0079] Extracting any temperature value corresponding to any point in the real-time temperature information; determining whether the any temperature value reaches any predetermined threshold value of the any point in the predetermined intervention constraint; if yes, it is proved that the real-time temperature information reaches the predetermined intervention constraint, and the circulating oil cooler is started to perform emergency cooling processing on the target main shaft; wherein the cooling oil in the circulating oil cooler performs emergency cooling processing on the target main shaft with a predetermined cooling parameter, and the predetermined cooling parameter includes a flow rate greater than or equal to 10 L / min and an oil pressure of 3 MPa.

[0080] Further, the vibration suppression module 14 is further used to execute the following steps:

[0081] acquire a real-time ambient temperature of the target spindle; sequentially traverse the real-time temperature information to obtain a first temperature value of the front bearing outer ring, a second temperature value of the middle part of the spindle box, and a third temperature value of the motor connection part; respectively calculate a first temperature difference between the first temperature value and the real-time ambient temperature, a second temperature difference between the second temperature value and the real-time ambient temperature, and a third temperature difference between the third temperature value and the real-time ambient temperature; retrieve a predetermined compensation coefficient to perform weighted calculation on the first temperature difference, the second temperature difference, and the third temperature difference, and obtain the real-time axial compensation amount.

[0082] Further, the vibration suppression module 14 is further used to execute the following steps:

[0083] activate an electromagnetic active vibration suppressor, and perform active vibration suppression on the tool holder of the target spindle through the electromagnetic active vibration suppressor, wherein the electromagnetic active vibration suppressor comprises a displacement sensor group and a PD controller; the vibration signal of the tool holder is dynamically monitored through the displacement sensor group; the electromagnetic vibration suppression force is obtained by converting and processing the vibration signal through the PD controller, wherein the electromagnetic vibration suppression force is used to perform active vibration suppression on the tool holder.

[0084] Further, in the vibration suppression module 14:

[0085] The displacement sensor group comprises four groups of displacement sensors arranged on the tool holder in a mounting plan, and the mounting plan refers to that the spacing between each monitoring point is 90°, and the gap between each sensor probe and the surface of the tool holder is less than or equal to 0.1 mm.

[0086] Further, the vibration suppression module 14 is further used to execute the following steps:

[0087] After the vibration suppression on the target spindle according to the real-time axial compensation amount calculated based on the axial deformation correction decision, the real-time cutting parameters are dynamically monitored based on the predetermined cutting index; the real-time cutting parameters are compared with the predetermined cutting parameters to obtain a real-time cutting deviation index; if the real-time cutting deviation index reaches a predetermined deviation limit value, a cutting optimization signal is sent, and the real-time cutting parameters are dynamically adjusted based on the cutting optimization signal; wherein the predetermined cutting index comprises cutting speed, feed per tooth, and axial cutting depth.

[0088] Further, the vibration suppression module 14 is further used to execute the following steps:

[0089] Obtaining a historical cutting operation record of a same kind machine tool of the gantry machine tool; obtaining a first cutting data set according to the historical cutting operation record, wherein the first cutting data set comprises a first cutting control parameter and a first cutting effect parameter; when a first cutting fitness obtained by analyzing the first cutting effect parameter reaches a predetermined fitness limit value, taking the first cutting control parameter as the predetermined cutting parameter; wherein, comprising: performing mutation weighting calculation on a first vibration kurtosis value and a first surface roughness in the first cutting effect parameter to obtain the first cutting fitness.

[0090] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the above describes a specific embodiment of the present application. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or can be advantageous.

[0091] The above only describes the preferred embodiments of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0092] The specification and drawings are merely exemplary of the present application, and any and all modifications, variations, combinations or equivalents that fall within the scope of the present application should be considered. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the present application and its equivalent technology, the present application is intended to include these modifications and variations.

Claims

1. A vibration suppression optimization method for a high-rigidity gantry milling machine spindle, characterized in that, include: Based on the spindle optimization mechanism, the spindle of the gantry milling machine is preprocessed for structural optimization to obtain the target spindle; Activate the distributed temperature sensor to dynamically and continuously monitor the temperature of the target spindle and obtain real-time temperature information; When the real-time temperature information reaches the predetermined intervention constraint, the circulating oil cooler is activated to perform emergency cooling treatment on the target spindle, and an axial deformation correction decision is generated simultaneously. Vibration suppression is performed on the target spindle based on the real-time axial compensation amount calculated according to the axial deformation correction decision. After suppressing vibration of the target spindle based on the real-time axial compensation amount calculated according to the axial deformation correction decision, the method further includes: Real-time cutting parameters are obtained based on dynamic monitoring of predetermined cutting indices; The real-time cutting parameters are compared with the predetermined cutting parameters to obtain the real-time cutting deviation index; If the real-time cutting deviation index reaches the predetermined deviation limit, a cutting optimization signal is issued, and the real-time cutting parameters are dynamically adjusted based on the cutting optimization signal. The predetermined cutting parameters include cutting speed, feed per tooth, and axial depth of cut; The real-time cutting parameters are compared with the predetermined cutting parameters to obtain the real-time cutting deviation index, including: Obtain historical cutting operation records of similar machine tools used in the same type of gantry milling machine; A first cutting dataset is obtained based on the historical cutting operation records, wherein the first cutting dataset includes a first cutting control parameter and a first cutting effect parameter; When the first cutting adaptability obtained by analyzing the first cutting effect parameters reaches the predetermined adaptability limit, the first cutting control parameters are used as the predetermined cutting parameters. This includes: performing a variation-weighted calculation on the first vibration kurtosis value and the first surface roughness in the first cutting effect parameters to obtain the first cutting fitness; The distributed temperature sensor is installed at predetermined points on the target spindle, and the predetermined points include at least the outer ring of the front bearing, the middle of the spindle box, and the motor connection point. The real-time temperature information includes the temperature value at the predetermined point. When the real-time temperature information reaches the predetermined intervention constraint, the circulating oil cooler is activated to perform emergency cooling treatment on the target spindle, including: Extract any temperature value corresponding to any point in the real-time temperature information; Determine whether the arbitrary temperature value reaches any predetermined threshold of any point in the predetermined intervention constraint; If the condition is met, it proves that the real-time temperature information has reached the predetermined intervention constraint, and the circulating oil cooler is activated to perform emergency cooling treatment on the target spindle. The circulating oil cooler uses cooling oil to perform emergency cooling on the target spindle with predetermined cooling parameters, including a flow rate of ≥10L / min and an oil pressure of 3MPa. The real-time axial compensation amount calculated based on the axial deformation correction decision includes: Obtain the real-time ambient temperature of the target spindle; The first temperature value of the outer ring of the front bearing, the second temperature value of the middle part of the spindle box, and the third temperature value of the motor connection are obtained by sequentially traversing the real-time temperature information. The first temperature difference between the first temperature value and the real-time ambient temperature, the second temperature difference between the second temperature value and the real-time ambient temperature, and the third temperature difference between the third temperature value and the real-time ambient temperature are calculated respectively. The first temperature difference, the second temperature difference, and the third temperature difference are weighted and calculated using a predetermined compensation coefficient to obtain the real-time axial compensation amount. The spindle optimization mechanism includes torque transmission strategy, oil groove lubrication strategy, and vibration elimination strategy; The torque transmission strategy refers to using a predetermined carbon coupling to perform an interference fit connection between the main spindle and the transition shaft of the gantry milling machine. The predetermined carbon coupling employs a high-torsional-rigidity carbon fiber sheet structure with an axial stiffness greater than or equal to 3.12 × 10⁻⁶. 5 N / mm, radial stiffness greater than or equal to 1.88×10 6 N / mm, transmitted torque greater than or equal to 1700 N·m; The oil groove lubrication strategy refers to applying plastic coating to the guide rail of the external sliding ram structure of the spindle, wherein the thickness of the fluororesin soft strip of the plastic-coated guide rail is greater than or equal to 0.5 mm, and a lubricating oil groove is provided, and the coefficient of friction of the plastic-coated surface of the guide rail is less than or equal to 0.

05. The jitter elimination strategy refers to applying screw counterweights to the predetermined double-end screw holes of the spindle. It also includes activating an electromagnetic active vibration damper and using the electromagnetic active vibration damper to actively dampen the tool holder of the target spindle, wherein the electromagnetic active vibration damper includes a displacement sensor group and a PD controller. The vibration signal of the tool holder is obtained by dynamic monitoring using the displacement sensor group. The vibration signal is converted and processed by the PD controller to obtain an electromagnetic vibration damping force, which is used to actively dampen the vibration of the tool holder.

2. The vibration suppression optimization method for high-rigidity gantry milling machine spindles as described in claim 1, characterized in that, The displacement sensor group includes four sets of displacement sensors arranged on the tool holder according to the installation plan, and the installation plan means that the distance between each monitoring point is 90° and the gap between each sensor probe and the surface of the tool holder is less than or equal to 0.1mm.

3. A vibration suppression optimization system for a high-rigidity gantry milling machine spindle, characterized in that, The system is used to perform the vibration suppression optimization method for the high-rigidity gantry milling machine spindle according to any one of claims 1 to 2, the system comprising: The structural optimization preprocessing module is used to perform structural optimization preprocessing on the spindle of the gantry milling machine according to the spindle optimization mechanism to obtain the target spindle. The dynamic temperature monitoring module is used to activate the distributed temperature sensor to perform dynamic and continuous temperature monitoring of the target spindle and obtain real-time temperature information. An emergency cooling module is used to activate the circulating oil cooler to perform emergency cooling on the target spindle when the real-time temperature information reaches a predetermined intervention constraint, and simultaneously generate an axial deformation correction decision. The vibration suppression module is used to suppress the vibration of the target spindle based on the real-time axial compensation amount calculated based on the axial deformation correction decision.

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