477 results about "Machine tool control" patented technology

The invention relates to the technical field of numerical control machine tools, and discloses a five-axis high-precision numerical control machine tool control method, device and equipment and a storage medium, and the method comprises the steps: collecting temperature data and displacement data of a five-axis high-precision numerical control machine tool, and carrying out state space modeling to obtain a machine tool motion state model; stress data and thermal error influence factors of the feed shaft are calculated; feeding shaft stress data and the thermal error influence factors are input into the compensation model, real-time compensation parameters are calculated, compensation control is conducted on the machine tool feeding shaft, and a compensation control result is obtained; according to the compensation control result, an initial machining track optimization model is constructed, and optimized machining parameters are generated; performing segmented machining control based on the optimized machining parameters to obtain real-time machining data; the initial machining track optimization model is optimized based on the real-time machining data, a target machining track optimization model is obtained, and the dynamic response performance and the control precision of the five-axis high-precision numerical control machine tool are improved through the method.

The invention discloses a machine tool control method and system based on mechatronics, and the method comprises the steps: outputting an optimal cutting track sequence according to the three-dimensional model features and material attribute parameters of a machined workpiece; based on the optimal cutting track sequence, motion interference among shafts of the machine tool is eliminated through dynamic weight distribution, and an anti-interference optimization machining instruction is generated; constructing a nonlinear vibration wave propagation model according to the coupling relation between the spindle rotating speed and the feeding speed, and generating a steady speed regulation and control signal; generating an energy efficiency optimal parameter set including motor torque, cooling power and lubricating frequency based on the energy consumption efficiency constraint condition and the steady speed regulation and control signal; and outputting a closed-loop control signal and synchronously updating the three-dimensional machining precision thermodynamic diagram according to the real-time data in the machining process and the predicted deviation of the digital twin model. According to the embodiment of the invention, global optimization, dynamic adaptation and efficient operation of the machine tool can be realized, and technical support is provided for intelligent upgrading of the modern manufacturing industry.

The invention belongs to the technical field of numerical control machine tool machining, and particularly discloses a numerical control machine tool machining reference point correction method and system, a terminal and a medium. Based on the three-dimensional coordinate information, the actual position of a preset reference point on the machine tool is extracted and compared with a preset theoretical reference point, and a deviation value is calculated; executing coordinate deviation aggregation analysis according to the deviation value, and determining coordinate system correction parameters including a translation vector and a rotation matrix; the corrected parameters are issued to a numerical control machine tool control system, and a current workpiece coordinate system is updated; and after the coordinate system is updated, the machining task continues to be executed, the machining state is monitored in real time, and if it is detected that the deviation exceeds a threshold value, the measurement and correction process is automatically triggered again. Automatic correction of the reference point and real-time compensation of the workpiece coordinate system can be achieved, the machining precision is improved, manual intervention is reduced, and the method is suitable for high-precision numerical control machining scenes.

The invention relates to the technical field of numerical control drilling machine tools, and discloses a numerical control drilling machine tool. When the numerical control machine tool controls the connecting shaft to move downwards, airflow sprayed out of the air guide hole preferentially sprays sweeps in a drill hole upwards, the cutting cutter head can continuously cut up long sweeps generated in the drill hole when the drill bit drills, on one hand, the long sweeps can be conveniently sprayed out through the airflow, on the other hand, winding of the sweeps is avoided, and the cutting efficiency is improved. And finally, the numerical control machine tool controls the connecting shaft to move upwards, at the moment, the chip removal block pops up to further discharge the waste chips remaining in the drill hole, finally, the effects of cutting the long waste chips to avoid winding and rapidly discharging the chopped waste chips are achieved, and the problem that when the drill hole is too deep and the waste chips are too long, the waste chips cannot be cut is solved. And long sweeps at the bottom of a drilled hole cannot be quickly discharged through short-distance up-down reciprocating motion, and the risk that the sweeps are wound still exists.

The invention discloses a three-dimensional laser cutting method for a frame with an n-shaped section. The three-dimensional laser cutting method comprises the following steps that S1, a tool is clamped; s2, a part is preliminarily clamped, and a notch theoretical line is scribed; s3, alignment is carried out; s4, the cutting of all the round holes is compiled into a subprogram, and the cutting program of each notch is compiled into different bisection subprograms; and S5, the cutting track of each subprogram is preliminarily debugged, and each subprogram is adjusted as required according to the measurement result after the first workpiece is cut. The additional shaft of the machine tool controls the rotating table to rotate in a numerical control mode, so that the tool drives the part to rotate, it is ensured that each pair of notch cutting positions are located at the lowest point of the part clamping posture, cutting head movement is simplified into four-shaft movement, and interference of a rotating shaft is avoided; a small number of attitude control points are arranged to optimize the cutting attitude, three-dimensional five-axis laser cutting of the n-shaped section frame is achieved, the programming and debugging efficiency is improved, the equipment safety is improved, and the overlap ratio of notches is ensured.

The invention relates to the technical field of numerical control machine tool control, in particular to a data-driven numerical control machine tool temperature compensation method and system, and the method comprises the steps: comparing the variation trend of temperature data and the difference of the amplitude between a temperature measurement point and a homologous measurement point; obtaining a temperature interference degree by combining the similarity of the autocorrelation degree of the temperature data between the temperature measuring point and the homologous measuring point, and determining a temperature weight coefficient by combining the correlation degree between the displacement data of the main shaft of the numerical control machine tool in the main direction and the temperature data of any homologous measuring point of each temperature measuring point at all acquisition moments; and compensating the temperature of the numerical control machine tool at the current moment. The invention aims to improve the precision of temperature compensation of the numerical control machine tool.

The invention relates to the technical field of machine tool control, in particular to a numerical control machine tool intelligent control method and system for aviation titanium alloy structural part machining. According to the method, firstly, three kinds of working condition data of cutting force, temperature and vibration are collected, then, working condition feature vectors are extracted and input into a pre-training model, an optimized combination value of the feeding speed and the main shaft rotating speed is obtained, and finally, the machine tool track is adjusted in real time based on optimized parameters. And through continuous optimization of the deep learning model, the adaptive capacity to complex working conditions is improved, and the machining precision and the surface quality of the aviation titanium alloy structural part are improved.

The invention relates to the technical field of numerical control machine tool control, in particular to a machining parameter automatic optimization method and system for a three-axis numerical control machine tool, and the method comprises the specific steps: collecting machine tool parameter data and workpiece parameter data, the machine tool parameter data comprises the current and voltage of the three-axis numerical control machine tool and the wear state of a cutter; the workpiece parameter data comprises workpiece scale, vibration, deflection and surface roughness; based on the machine tool parameter data and the workpiece parameter data, a physical information neural network is adopted to construct a three-axis numerical control machine tool digital twin model, real-time monitoring and feedback are carried out, and the machining efficiency and energy consumption are calculated; a numerical control machine tool machining process model and an energy consumption model are constructed based on the machining efficiency and the energy consumption, the machining efficiency is maximized and the energy consumption is minimized by using an optimization algorithm, the machining process model reflects quality efficiency indexes, and the energy consumption model reflects energy consumption characteristics; and through an optimization function obtained through the optimization algorithm, a control instruction execution module is constructed, and comprehensive factory control is covered.

The invention relates to the technical field of machine tool control, in particular to an electrolysis arc milling composite numerical control machine tool control method and system for case machining. The method comprises the steps that firstly, an electrolyte supply system, an electric arc generation system, a high-pressure water jet system and an ultrasonic vibration system are started in sequence, operation data are obtained, and rough machining parameters are calculated; in the rough machining process, the machining gap, the discharging state and the temperature are monitored in real time and compared with standard parameters, and correction values are calculated; after rough machining is completed and the electrolytic arc milling device is detached, the feeding speed and the spindle rotating speed are adjusted according to the correction value, and finish machining parameters are obtained; by electrolyzing electric arc corrosion materials and combining the synergistic effect of high-pressure water jet and ultrasonic vibration, efficient removal and accurate control of super-difficult-to-machine materials such as titanium alloy and high-temperature-resistant alloy in the machining process are achieved, and the machining efficiency and quality are improved.

The invention relates to the technical field of machine tool control, in particular to a machine tool thermal error compensation method and system based on data analysis. A machine tool thermal error compensation system based on data analysis comprises a data acquisition module, a machine tool thermal error analysis data construction module, a machine tool thermal error analysis module and a machine tool thermal error compensation module. The method comprises the following steps: acquiring a shaft temperature data set and vibration signal data of each shaft of the machine tool, current data at a servo motor of the machine tool, ambient temperature data around the machine tool and infrared images at the machine tool, and determining the running state of the machine tool under the assistance of multi-source data; weight distribution adjustment is carried out on the features related to the thermal error based on the operation state of the machine tool, the features strongly related to the thermal error under different working conditions are highlighted, the accuracy of thermal error analysis is improved, and then the thermal error compensation effect of the machine tool is improved.

The invention belongs to the technical field of numerical control machine tool control, and discloses a deep groove ball bearing ring grinding error compensation method and system, and the method comprises the steps: monitoring the temperature of a numerical control grinding machine body and a main shaft in real time through a plurality of temperature sensors, and obtaining the temperature field distribution data of a numerical control grinding machine; according to the numerical control grinding machine temperature field distribution data, the temperature gradient of each temperature measurement position is calculated; comparing each temperature gradient obtained by calculation with a preset temperature gradient threshold value, and judging whether a temperature measurement position with the temperature gradient exceeding the temperature gradient threshold value exists or not; when the temperature measurement positions with the temperature gradients exceeding the temperature gradient threshold exist, error compensation parameters of the numerical control system are determined according to the temperature gradients of all the temperature measurement positions, and the grinding machining track and grinding parameters are corrected; therefore, the grinding precision of the deep groove ball bearing ring can be improved.

The invention discloses a numerical control machine tool machining state monitoring method and device, and belongs to the technical field of digital machine tool control. The method comprises the following steps: step 1, constructing a double-layer sensing network system consisting of an environment layer and a machine tool layer, and realizing preliminary physical isolation of environment parameters and a machine tool thermal state; 2, forming a multi-dimensional parameter mapping library of environmental influence and self-heating; 3, decomposing the temperature change signal into a low-frequency environment component and a high-frequency processing thermal response component, respectively extracting environment characteristics and processing characteristics in the low-frequency environment component and the high-frequency processing thermal response component, and realizing real-time classification and decoupling of the temperature signal; 4, constructing a heat influence cross matrix, and quantitatively describing the influence degree and interaction effect of the environmental parameter change and the machine tool heating on the precision of each shaft; and 5, designing a dual-channel parallel compensation control mechanism based on an analysis result of the thermal influence cross matrix, generating a final compensation instruction, and implementing and executing the final compensation instruction to realize precision stable control.

The invention relates to the technical field of machine tool control, and provides a machine tool machining control method and system.The method comprises the steps that in the machine tool machining process, microenvironment parameters of a cutting area are obtained and monitored; obtaining a cutter type, a workpiece material attribute and a preset cutting parameter corresponding to the machine tool; based on the tool type, the workpiece material attributes and the preset cutting parameters, an initial judgment basis of the tool wear speed is established; according to the deviation between the microenvironment parameters and a preset standard value, the initial judgment basis is corrected, and the corrected tool wear speed is obtained; according to the actual tool abrasion loss, the rule for subsequently correcting the initial judgment basis is optimized; and based on the corrected tool wear speed, the tool remaining life is updated, and when tool wear reaches a preset threshold value, a compensation strategy of the cutting parameters or the tool path is decided and executed in combination with the value of the machined workpiece and the remaining machining task. The method has the effect of improving the prediction accuracy of the tool wear speed.

The invention belongs to the technical field of numerical control machine tools, and particularly relates to a method, device and system for a numerical control machine tool controller to automatically generate an operation instruction based on a language large model.The method comprises the first step of obtaining operation requirements and problems of operators, the second step of preliminarily screening the operation requirements and problem fields, and the third step of setting the numerical control machine tool controller, the method comprises the following steps of 1, establishing a multi-modal model, and obtaining multi-modal information of the numerical control machine tool through a numerical control machine tool controller, 4, constructing the multi-modal large model, and inputting the multi-modal information obtained in the third step into the multi-modal large model for processing, 5, executing a control instruction and an operation prompt, and 6, performing real-time feedback and dynamic adjustment. According to the method, the operation requirement of an operator can be obtained in a voice or character mode, and the corresponding control instruction is automatically generated by utilizing the embedded multi-mode large model in combination with the current state of the machine tool and the operation interface information.

The invention relates to the technical field of machine tool control, in particular to a milling cutter positioning self-adaptive control method and system. Comprising the following steps: synchronously collecting structure state data and external environment parameters of a machine tool in a preset sampling period; based on the structure state data, the external environment parameters and thermal-structure and dynamic physical characteristic parameters of the machine tool, a positioning deviation prediction model is established in a preset look-ahead time window, and the future three-dimensional total positioning deviation of the milling cutter relative to the theoretical track is obtained; and a prospective compensation instruction opposite to the future three-dimensional total positioning deviation is generated according to the future three-dimensional total positioning deviation, and compensation motion of the milling cutter is achieved. The problem that in the prior art, in the long-time operation process of a machine tool, the actual position of a milling cutter deviates from a preset path due to an internal heat source, and an existing thermal error compensation model cannot accurately predict and deal with severe and local thermal shock caused by sudden change of an external environment, so that the machining precision is affected is solved.

The invention relates to a flexible combined machine tool control system. The system comprises a multi-channel user interface module, a servo parameter monitoring module, a workpiece coordinate system management module and the like. The multi-channel user interface module is associated with a work station by means of a dynamic binding technology, automatically generates an interactive interface according to configuration parameters and visually configures an enabling state. And the servo parameter monitoring module displays and adjusts the shaft motion parameters in real time and adjusts the shaft motion parameters on line, the deviation is corrected through a self-adaptive algorithm, coordinate synchronization of multiple workstations is achieved through the algorithm and a batch writing function, and mixed analysis of an NC program and a user-defined instruction is supported. The hardware abstraction layer module encapsulates a heterogeneous control card interface, dynamically allocates hardware resources, and coordinates time sequence linkage of each part by using a state machine model. The system also combines visual inspection to correct cutter compensation parameters, and double safety protection is set. According to the invention, the problem of low equipment cooperation efficiency in multi-station flexible processing is effectively solved, and the system compatibility and the processing precision are improved.

The invention relates to the technical field of precision manufacturing, and discloses a high-precision numerical control machine tool thermal error compensation method and system.The method comprises the steps that temperature data of key parts of a machine tool are collected in real time through a sensor array, and temperature distribution is generated through preprocessing; simulating a heat propagation path based on finite element analysis to obtain thermal deformation distribution; quantizing contribution values of multiple heat sources to cutter position offset by adopting a neural network model; when the contribution value exceeds a threshold value, activating a cooling system compensation mechanism to generate an offset correction amount; the correction is fused into a machine tool control system to optimize a tool path, and the thermal error model is dynamically updated based on the deviation between the actual machining position and the predicted deformation; and finally, a self-adaptive control strategy is generated in combination with the working condition parameters and the heat source contribution value, and accurate control over thermal errors is achieved through real-time feedback circulation. The method can solve the problem of low machine tool thermal error control precision in the prior art.

The invention discloses a face gear worm grinding machine error compensation method based on sensitivity analysis and a multi-source error mapping model, which comprises the following steps of: 1, constructing a multi-source error-tooth surface error mapping model based on a vector decomposition and truncation function method, the truncation function method is used for quantitatively describing propagation mechanisms of geometric errors and thermal errors in a machining chain and influences of the propagation mechanisms on tooth surface deviation, and high-order error terms are eliminated to improve calculation efficiency; 2, responding to the output of the mapping model, applying an improved Morris sensitivity analysis method, distributing a weighting coefficient higher than a geometric error component for a thermal error component, and calculating a weighting sensitivity coefficient so as to identify a key error component which has the greatest influence on the tooth surface precision; and 3, based on the key error component, a motion axis compensation value is generated through an error compensation model, and the compensation value is input into a machine tool control system to adjust the relative position of the worm grinding wheel and the workpiece, so that the tooth surface error is reduced.

The invention provides a spindle constant-temperature AI closed-loop heat engine system, and relates to the technical field of numerical control machine tool control and heat management. The invention aims to solve the problems of response lag, uncontrollable thermal stress, single heating strategy and the like of the traditional spindle heat engine method. The system comprises a multi-dimensional thermal state sensing module used for constructing a multi-node discrete temperature field representing the overall thermal distribution of the main shaft; the real-time heat balance feedback module is used for judging the cold / hot starting state of the main shaft according to the initial temperature difference and executing a differentiated feedback control strategy; and an AI prediction forward compensation module that predicts a future cutting thermal load by pre-reading a machining instruction and generates a feedforward thermal compensation instruction. According to the method, the thermal stress is controlled by introducing the radial thermal gradient index as the safety constraint, negative precooling or positive preheating is achieved in combination with the AI predictive capacity, a feedback and feedforward composite control mode is formed, and the dynamic thermal stability and the machining precision of the main shaft under the complex working condition are improved.

The invention discloses a multi-axis linkage numerical control machine tool control system, which comprises a cutter adjusting module, which is used for carrying out parameter adjustment according to first state data, second state data and third state data to obtain fourth state data of a cutter; the trajectory planning module is used for simulating motion trajectories of a plurality of shafts according to the fourth state data by utilizing simulation software, and performing precision compensation on the motion trajectories of the shafts; and the risk prevention module is used for predicting the first risk and the second risk and implementing prevention measures. The angle and the cutting speed of the cutter are adjusted in a self-adaptive mode, the cutter is matched with the curvature of the surface of the workpiece, so that the flatness of the machining face is improved, the situation that the extrusion force of the cutter on the workpiece is too large is avoided, deformation, except for cutting, of the workpiece is prevented, and the machining precision is improved. A plurality of main shafts and slave shafts are subjected to analog simulation, the cutting angle and the cutting speed of the cutter are further adjusted according to the simulation result, and safe operation of equipment is guaranteed on the premise that the machining precision is guaranteed.

The invention discloses a head-to-head horizontal processing machine tool control method and a machine tool, and belongs to the technical field of machine tool processing. The butt horizontal machining tool control method comprises the following steps that S1, a first path machining program of a first horizontal machining center is established, and the first path machining program is used for controlling the first horizontal machining center to machine a workpiece; establishing a second path machining program of a second horizontal machining center, wherein the second path machining program is used for controlling the second horizontal machining center to machine the workpiece; meanwhile, a tool management mechanism is established. According to the butt horizontal machining tool control method and the machine tool, two faces of a workpiece can be machined at a time, the clamping frequency is reduced, machining stations are increased, and the machining precision error of the two faces of the same workpiece is small. The two horizontal machining centers share one set of linear tool magazine, the tool changing action is stable and reliable, the tool changing speed is high, and the equipment space is reduced.

A controller of a machine tool determines in accordance with a machining program whether a first tool post is used to machine an unfinished workpiece. When the unfinished workpiece needs machining before terminating a continuous machining and when the controller determines that the first tool post is used to machine the unfinished workpiece W2, the controller simultaneously advances a first system and a second system in accordance with the machining program while preventing machining a workpiece held by the first spindle. When the controller determines that the first tool post is not used to machine the unfinished workpiece, the controller stops the first system and advances the second system in accordance with the machining program.

According to the five-axis rotary table driven by the liquid cooling permanent magnet synchronous motor, a liquid cooling channel is formed between the inner side of the five-axis rotary table and the outer side of the permanent magnet synchronous motor, circulation is formed through the liquid cooling channel and an external heat exchanger through a pipeline, and one end of the liquid cooling channel takes away heat generated by the motor; the other end of the liquid cooling channel circulates the cooling liquid cooled by the heat exchanger to the outer side of the permanent magnet synchronous motor for continuous cooling, so that heat dissipation of the motor is facilitated; the liquid cooling channel is of a multi-layer parallel structure, the flow is large, the flow speed is high, liquid can be rapidly fed and discharged, and uniform and efficient heat dissipation is achieved; a temperature sensor is arranged in the enameled wire coil and used for transmitting temperature data in the coil to a machine tool control system and detecting the real-time temperature of the motor, and meanwhile the heat exchanger adjusts the temperature of input liquid according to the monitored temperature.

The invention discloses a configuration computer numerical control method for a five-axis linkage machine tool and a control system, and relates to the technical field of machine tool control. The method comprises the steps that in the process that the five-axis linkage machine tool machines a target workpiece, the movement cumulant, the average feeding speed and the average feeding amount resistance in the movement axis direction of all movement axes of the five-axis linkage machine tool at all moments are obtained; for each moving axis, determining a load factor of the moving axis at each moment based on the moving cumulant, the average feeding speed and the average feeding amount resistance at each moment; based on the load factor of each moving shaft at each moment, analyzing the change trend of the load factor of each moving shaft, and determining a correction weight in the direction of each moving shaft; and on the basis of the correction weights, machining compensation is carried out on the directions of the moving shafts, so that the machining process of the target workpiece is corrected. The high-precision machining requirement can be met, and the workpiece machining quality is effectively improved.

The invention relates to the technical field of numerical control machine tool control, and discloses a numerical control rotary table precision compensation method and system based on digital twinning. The method comprises the following steps: constructing a digital twin model of the numerical control rotary table for simulating a deformation behavior under a thermal-mechanical coupling effect; multi-source physical field sensing data such as bearing temperature, servo motor current and rotary table angular displacement are collected in real time; the digital twin model is driven by the sensing data to perform thermal-mechanical coupling simulation, and a comprehensive error prediction value is obtained; generating a compensation trigger signal based on a comparison result of the error prediction value and a preset threshold value; in response to the trigger signal, generating an axis motion feed-forward compensation instruction through inverse kinematics calculation; and the compensation instruction and the original machining instruction are executed after being superposed. Dynamic prediction and active compensation of the precision of the numerical control rotary table are achieved, and the machining precision and stability are effectively improved.

The invention provides a numerical control machine tool intelligent control method and device combined with error analysis and a storage medium, and relates to the technical field of numerical control machine tool intelligent control. Setting U error hiding mode starting points and V error hiding mode ending points; performing propagation simulation according to error state transition, and simulating an error hidden cumulative map; configuring U error hiding mode starting points by using equipment basic data, performing propagation path simulation in an error hiding cumulative map, and obtaining M error simulation propagation paths; identifying a key error source sequence with the influence on the machining precision from large to small; setting an error compensation strategy and sending the error compensation strategy to the numerical control machine tool terminal for compensation control. The technical problems that in the prior art, deep analysis on an error propagation path is lacked, and the control precision of a numerical control machine tool is low are solved, and the technical effect that the control precision is improved by combining error analysis and a corresponding compensation strategy is achieved.

The invention discloses an intelligent machine tool control method and system based on big data analysis, and the method comprises the steps: collecting a key parameter set of a machining technology, decomposing a vibration signal in a machining process through combining successive variational mode decomposition (SVMD), and extracting the modal frequency, amplitude and fluctuation characteristics of the signal; the method comprises the following steps: on the basis of a BiLSTM-Enhanced Transformer (BET) model, capturing a nonlinear relationship between a key parameter set of a processing technology and carbon emission, economic cost and vibration loss, training an optimal parameter model by adopting an improved energy valley optimization algorithm IEVO, and constructing an IEVO-BET machine tool intelligent control system; a key parameter set of a machining process is used as input, adjustable variables of the machining process are adjusted in real time through the synergistic effect of an IEVO model and a BET model, and multivariable control over carbon emission, energy consumption and economic cost in the machining process of a machine tool is achieved. The intelligent and real-time machine tool control requirements under different process requirements are met, carbon emission is effectively reduced, the production efficiency is improved, and the product quality and the sustainability of the machine tool performance are enhanced.

The present invention relates to the field of numerical control machine tool control technology, and particularly relates to a high-precision multi-axis machining composite numerical control machine tool control system, including: a collection module; a prediction module respectively determines a radius time series curve and a length time series curve according to the tool radius and the tool length, and constructs a tool wear prediction model in combination with the vibration amplitude and the preset movement path of the tool; an analysis module determines the tool wear degree according to the tool wear prediction model, and determines the critical influence path segment and the non-critical influence path segment according to the vibration amplitude; an optimization module determines the correction direction and the path correction amount according to the critical influence path segment, the non-critical influence path segment and the tool wear degree to determine the new tool movement path, and determines the adjustment method for the cutting speed / feed speed according to the tool wear degree. The present invention incorporates tool wear into the dynamic adjustment mechanism of the path, improving the machining accuracy.

The embodiment of the invention provides a numerical control machine tool control method and device, computer equipment and a storage medium. The method comprises the steps that in the process of controlling the numerical control machine tool to execute workpiece machining based on plan control data, actual machining state data of the numerical control machine tool are acquired; wherein the plan control data comprises control parameters of each stage after the processing rhythm is divided into a plurality of stages; performing comparative analysis on the actual processing state data and expected processing state data corresponding to the plan control data to obtain difference characteristic data corresponding to each stage; adjusting plan control data according to the difference characteristic data, and controlling the numerical control machine tool to execute the process of machining the workpiece based on the adjusted plan control data. By acquiring the actual machining state data of the numerical control machine tool in real time and comparing and analyzing the actual machining state data with the planned control data, the difference characteristic data in the machining process can be recognized in time, so that the control parameters are dynamically adjusted, and the machining precision and efficiency are improved.

The invention relates to the technical field of numerical control machine tool control, in particular to a numerical control machine tool axial positioning control method and system. The method comprises the following steps: driving a servo motor to execute reverse clearance compensation motion; the synchronous sampling period obtains a position signal and a load current signal; performing composite judgment based on the position signal and the load current signal: judging whether the variable quantity of the position signal along the instruction direction reaches a preset position threshold value or not, and judging whether the increment of the load current signal relative to the reference current value reaches a preset current threshold value or not; when all items are compositely judged to be met at the same time, it is judged that the mechanical clearance is eliminated, reverse clearance compensation motion is terminated, and a double-closed-loop axial positioning control mode is switched; and when any one item is not satisfied through composite judgment, keeping the reverse clearance compensation motion. The problems that when the numerical control lathe rotates reversely in the axial movement direction for clearance compensation, compensation is not accurate, a workbench continuously wriggles near the target position, and the machining precision is affected are solved.