61 results about "Geometric error" patented technology

A quality prediction and adaptive compensation method and apparatus for curved surface assembly are provided. The method includes: inputting a geometric error function and a thermal error function into a spatial error model, to obtain a machining error prediction model; superimposing obtained machining errors on a theoretical surface of an assembly surface, to obtain a predicted machining surface; calculating, according to an assembly median plane determined based on the assembly surface, shape errors and assembly gap errors, and predicting curved surface assembly quality of a part by using the shape errors and the assembly gap errors; calculating an adaptive compensation amount of each assembly plane of the assembly surface based on the shape errors, the assembly gap errors, and the machining errors, when the curved surface assembly quality does not meet a preset assembly quality requirement, and compensating the corresponding assembly plane by using the adaptive compensation amount.

The invention discloses a geometric error identification and compensation system and method for a numerical control machine tool, and belongs to the technical field of numerical control machine tools, and the method comprises the steps: collecting the position, temperature and cutting force data of the machine tool in real time, and calculating the components of a position error, a thermally induced equivalent error and a force induced equivalent error to construct a multi-dimensional state vector; according to the method, a compensation value is calculated through a dynamic compensation model, the core of the method is that a dynamic modulation factor is introduced, the factor integrates the heat effect, the force effect and the multi-axis coupling effect to dynamically adjust the compensation weight, in addition, a grading trigger compensation strategy based on comprehensive error amplitude evaluation is designed, and the compensation accuracy is improved. The reconstruction compensation can update model parameters on line to cope with long-term changes of the system, intelligent distribution of compensation resources and self-adaptive adjustment of system changes are achieved, time-varying errors are effectively restrained, and precision, efficiency and robustness are taken into consideration.

The invention relates to a geometric error measuring method for a machine tool rotating shaft, standard balls are mounted on a rotating shaft workbench of a machine tool, a probe is mounted on a machine tool spindle, and the method comprises the following steps: rotating the rotating shaft workbench to obtain sphere center coordinates of a plurality of groups of standard balls; selecting the center coordinates of one group of standard balls, and calculating an optimal fitting plane; according to the optimal fitting plane and the center coordinates of the other groups of standard balls, position-independent errors are obtained; constructing a transformation matrix, and obtaining a coordinate system after the position-independent error is eliminated; obtaining a matrix equation by combining the center coordinates of the plurality of groups of standard balls, the transformation matrix and the coordinate system; and solving the matrix equation to obtain a position correlation error. The measuring method is based on a numerical control machine tool rotating shaft geometric error model, influences of position-independent errors on the center position of a standard ball at the initial position are considered, four position-independent errors and six position-related errors of the rotating shaft are obtained through step-by-step calculation, and comprehensive measurement of ten errors of the rotating shaft is achieved.

The application discloses a kind of geometric error parameterization fast modeling methods for multi-configuration five-axis machine tool.The method comprises the following steps: constructing the parameterized general transfer vector table of the five-axis machine tool of target type;The parameter set of five-axis machine tool is input into general transfer vector table, and general transfer vector table generates the transfer vector of each geometric error term of five-axis machine tool, to construct geometric error model;Geometric error term and five-axis coordinate are input into model, and model outputs the position deviation and attitude deviation of tool, to be used for the geometric error compensation of tool of five-axis machine tool.The transfer vector table constructed by the application can be reused, and the geometric error model constructed can be suitable for most conventional configuration machine tools;The application can realize the parameterization fast modeling of five-axis machine tool geometric error, can reduce the experience requirement of research and operator, and provides convenience for the accuracy design, error compensation research of various conventional five-axis machine tools and the transverse comparison research between various machine tool configurations and layouts.

The invention relates to the technical field of geometric error evaluation of hole and shaft parts in the field of machinery, and discloses a hole and shaft part action boundary discrimination method, which comprises the following steps of: deriving a motion coefficient vector for describing radius change of each measuring point based on a tiny rigid body motion model of a surface measuring point set of a measured part; and the motion coefficients are combined into a motion coefficient matrix. Furthermore, the method establishes a discriminant inequality group based on a mutual exclusion proposition. The judgment process is realized by analyzing the rank of the motion coefficient matrix and iteratively solving an equation set formed by the maximum linear independent matrix of the motion coefficient matrix, and finally, whether the fitting cylinder is the action boundary or not is determined by judging whether the inequality set has a feasible solution or not. According to the method, the problems of complicated geometric discrimination conditions, lack of universality and the like in the existing evaluation method can be solved, and a reliable basis which is easy to realize in a stylization manner is provided for determining the action boundary of the hole-shaft part.

The process adaptability pilot test verification evaluation method and system for the aviation structural part machining machine tool comprises the steps that the comprehensive geometric error, the motion linkage error and the machining process dynamic error of the machine tool are obtained, and a comprehensive precision evaluation model of the machine tool is established; based on a comprehensive precision evaluation model, processing efficiency adaptability evaluation is carried out on the machine tool; establishing a thermal characteristic model of the machine tool through heat source analysis, temperature field monitoring and thermally induced error modeling; establishing a resonance characteristic model of the machine tool through modal test of the whole machine and key parts and resonance characteristic evolution analysis in a processing space; and performing comprehensive process adaptability evaluation on the machine tool by combining the comprehensive precision evaluation model, the thermal characteristic model of the machine tool and the resonance characteristic model of the machine tool, and performing process adaptability pilot test verification on the machine tool based on an evaluation result.

An online measurement gear precision evaluation method considering geometric errors of a large-specification gear making machine tool is characterized in that a measurement path is planned based on the large-specification machine tool which is provided with an online measurement system and contains X, Y, Z and C axes, an online measurement system geometric error model is established, the influence of the geometric errors on a measurement result is analyzed, and the precision of the large-specification gear making machine tool is evaluated. And obtaining a theoretical comparison position corresponding to the actual measurement point, and evaluating the processed measurement result. A measurement path is planned according to an involute helical gear measurement principle and shaft configuration characteristics of a large-specification gear making machine tool; establishing a geometric error model in combination with the measurement path; and analyzing the influence of the geometric error on the measurement result, correcting the measurement result, and evaluating the corrected measurement result. According to the invention, the online measurement evaluation accuracy of the large-specification gear making machine tool is improved.

The present application relates to a kind of five-axis machine tool rotation axis geometric error detection and identification method based on ball bar measurement, comprising: establishing five-axis machine tool geometric error model;Determine the axis of rotation of two points, and respectively determine the installation position of ball bar X direction, Y direction, Z direction at the two points;Get the reading of ball bar at different installation positions when rotation axis rotates;According to the two groups of readings of ball bar and the coordinates of fixed ball when ball bar X direction, Y direction, Z direction is installed, 3 three-dimensional spherical surfaces are established respectively, the intersection point is a point on the axis of rotation, the axis expression of rotation axis is determined by two different space points;Compare actual axis and ideal axis when rotation axis rotates, determine all 10 geometric errors of rotation axis by means of corresponding geometric error identification formula.The present application is suitable for different types of five-axis machine tool rotation axis error detection scene, only need rotation axis to participate in rotation when measuring, principle is correct, convenient and simple, measurement is convenient, identification efficiency and identification precision are high.

The application discloses a forming gear grinding machine sensitive geometric error identification method for gear evaluation error, which comprises the following steps: establishing a grinding wheel rotary surface parameter model based on gear parameters to be machined; establishing a quantitative mapping analytical model of machine tool geometric error-gear tooth profile / helical line deviation; and identifying sensitive geometric errors affecting the evaluation deviation of the gear tooth profile / helical line. The application can identify key errors affecting the gear surface precision, provide a theoretical basis for subsequent machining compensation, and improve the forming gear grinding error compensation efficiency.

The invention discloses a method for identifying geometric errors of a C shaft of a numerical control forming gear grinding machine based on a ball bar. The geometric error generation mechanism is analyzed according to the structure and transmission chain characteristics of the C-axis rotary table of the numerical control forming gear grinding machine, and a geometric error identification model of the C-axis rotary table is established based on the homogeneous coordinate transformation principle. The method comprises the following steps: building a geometric error measurement system, reasonably selecting a measurement range and an overtravel, generating an operation program, measuring to obtain a variation H delta of a ball rod, inputting a geometric error identification equation, and obtaining and separating five geometric errors delta x, delta y, delta z, epsilon x and epsilon y of a C-axis turntable under different installation modes by using the ball rod. Compared with an existing measurement method which is complex, low in stability and precision and the like, the method has the advantages that an identification model is simplified, coupling interference of other error sources is reduced, a measurement system is quickly and simply built, five motion geometric errors of the C-axis turntable can be accurately separated, and the geometric error measurement and compensation precision of the C-axis turntable of the numerical control forming gear grinding machine is improved.

The invention relates to a geometric accuracy forward design method for a tool magazine and a tool changer. The geometric accuracy forward design method comprises the steps that S1, movement of the tool magazine and the tool changer is solved for all links of the tool magazine and the tool changer, and a movement matrix is established; s2, introducing an error term, constructing a tool magazine and tool changer full-link component geometric error transmission model, and establishing an error composite mapping model of a tool changer complete transmission chain; s3, determining specific numerical values or expressions of all motion items and error items based on rigid body hypothesis; s4, substituting the true value into the refined and simplified error transfer model, and guiding the subsequent assembly tolerance optimization design of the tool changer; and S5, carrying out sensitivity analysis on the optimized error transfer model to obtain a key geometric error term which greatly influences the accuracy of the tail end of the tool changer. The stability and machining precision of the tool magazine and the tool changing device in the machining process are improved, and the blank of an efficient and high-precision geometric precision design method in the tool magazine field is filled up.

The application discloses a numerical control machine tool precision distribution method from geometric error to manufacturing tolerance, comprising: using small deformation hypothesis and superposition principle to obtain the influence coefficient matrix of manufacturing tolerance to position related geometric error, and combining with the machine tool motion chain to establish a manufacturing tolerance-geometric error-space error three-layer mapping model; adopting Sobol total effect sensitivity analysis of the overall workspace characteristic trajectory to obtain the total effect sensitivity index of each manufacturing tolerance; establishing a manufacturing cost evaluation model, and combining with the total effect sensitivity index to construct a cost sensitivity index; taking the minimum manufacturing cost as the target, comprehensively considering the tolerance definition domain constraint, the sorting constraint and the space error confidence constraint, and using an optimization algorithm to realize precision distribution. The application traces the precision distribution from the abstract geometric error level to the part manufacturing tolerance level, and can further realize the collaborative optimization of machine tool precision design and manufacturing cost.

The application discloses a kind of cylinder longitudinal weld excess height measurement method, system and storage medium, method includes: first, build the measurement system containing mechanical measurement component and data processing unit, input cylinder design radius and support span parameter, calculate theoretical chord height benchmark value by geometric error compensation model, establish the virtual measurement zero point of eliminating the influence of cylinder curvature.Again, the original mechanical displacement and deflection angle are measured by mechanical component and transmitted to data unit.Data unit first does cosine error correction to original displacement, then eliminates cylinder curvature interference by curvature compensation operation, and separates out the real displacement component of weld excess height.Finally, according to the real component, the actual excess height is calculated, compared with the standard threshold to determine the eligibility, record the output maximum peak, complete weld excess height quantitative evaluation.Provides reliable technical support for welding quality detection.

This invention provides a method for sensitive identification and iterative compensation of geometric errors in gear tooth profile. Specifically, it includes the following steps: Step 1: Measuring the geometric errors of each axis of the machine tool using a laser interferometer, and establishing a geometric error-tooth profile error coupling model based on the principles of homogeneous coordinate transformation and form grinding; Step 2: Introducing Sobol global sensitivity analysis and quasi-Monte Carlo sampling to analyze the errors and screen out the key geometric error terms that have the greatest impact on tooth profile error; Step 3: Constructing an iterative compensation model based on sensitivity matrix and step size coefficient control with the goal of minimizing tooth profile error, and obtaining the compensation amount through iterative calculation. This invention combines sensitivity analysis with iterative solution, more effectively solving the compensation problem under nonlinear strong coupling conditions. Furthermore, this invention only compensates for key geometric errors, reducing the interference of redundant variables, lowering the computational load, and improving gear grinding accuracy.

This invention belongs to the field of CNC machining technology and discloses a method and apparatus for avoiding singular points in five-axis machining tool trajectories based on Riemann optimization. The method includes S1: reading tool position data and identifying singular regions in the machining path; S2: establishing an objective function on a unit spherical manifold, the objective function being used to guide the tool axis direction to deviate from the singular regions in step S1; S3: iteratively solving the objective function in step S2 using the Riemann optimization method to obtain the optimized tool axis direction to avoid the singular regions, reconstructing the trajectory of the optimized tool axis direction, and outputting the final tool position point through nonlinear error control. This invention avoids projection errors by directly optimizing the tool direction on a unit spherical manifold, uniformly handling the requirements of trajectory smoothness, accuracy, and non-singularity, effectively controlling geometric errors while ensuring machining continuity, and significantly improving the quality and reliability of five-axis CNC machining.

The invention discloses a machine tool key error identification method based on geometric error interval and sensitivity analysis, and belongs to the field of numerical control machine tools. The method comprises the steps of defining geometric error terms of motion axes according to a machine tool structure, performing repeated measurement on discrete positions at a plurality of preset time points, and constructing an error interval representing dynamic fluctuation with a maximum value and a minimum value; based on the error interval and the comprehensive error model, calculating the sensitivity coefficient of each geometric error at each position of the working space to the comprehensive error of the tool nose by adopting global sensitivity analysis; and determining a sensitivity coefficient threshold screening geometric error, and determining the geometric error as a key geometric error. According to the method, actually measured data and time-varying characteristics are fused, the influence of an error source on the machining precision is accurately quantified, regionalized and high-pertinence error identification and compensation are achieved, and the machining precision of a machine tool under dynamic working conditions such as thermal deformation is effectively improved.

This invention relates to the fields of intelligent manufacturing and computer-aided inspection technology, and particularly to a system for constructing and reasoning a knowledge base for precision machining geometric error inspection operators. The system includes a feature parsing module, used to read a 3D solid model containing product geometric technical specifications, extract geometric surface features and associated tolerance specifications from the model, wherein the tolerance specifications include tolerance thresholds, and convert the geometric surface features and tolerance specifications into semantic ontology instances, outputting a set of element instances. In this invention, by automatically parsing the geometric features and geometric tolerance semantics in the 3D solid model, and combining this with actual point cloud data obtained from on-machine measurement for error assessment and reverse calculation of compensation parameters, a closed-loop mapping from design tolerance semantics to CNC system compensation instructions is achieved. This enables the machining equipment to automatically correct the tool position and coordinate system offset based on actual inspection results, thereby improving the machining accuracy and consistency of parts.

To adjust a geometric error of a robot.SOLUTION: A system is connected with a robot having an arm. The arm includes, at an end thereof, a coupling part which has a rotation mechanism and to which an end effector can be attached, and in which a touch probe is installed at a position separated by a predetermined distance from a rotation axis of the rotation mechanism in a plane orthogonal to the rotation axis. The system stores teaching data and information on an attitude vector representing an attitude of the coupling part after control based on the teaching data. The system is configured to: control the robot on the basis of the teaching data; control the robot to rotate the rotation mechanism such that the touch probe comes into contact with a reference point of a measurement object; execute a plurality of times of measurement processing of recording the position of the coupling part; calculate a plane passing through the position of the coupling part obtained by the plurality of times of measurement processing; calculate a normal vector of the plane; and calculate an adjustment amount of deviation of the attitude of the coupling part on the basis of the normal vector and the attitude vector.SELECTED DRAWING: Figure 1

This invention discloses a multi-level mapping method for characterizing machine tool accuracy degradation and optimizing its key parameters, belonging to the field of machine tool accuracy retention technology. This method constructs a complete technical framework of forward modeling and prediction followed by reverse parameter optimization, achieving quantitative prediction and proactive control of machine tool accuracy retention throughout its entire lifecycle through four-level mapping. First, based on the small displacement screw method and multibody system theory, a whole-machine spatial accuracy model considering geometric errors at large assembly interfaces is constructed. Second, combining numerical simulation, the Arcard wear model, and the superposition method, a time-varying degradation model of guideway straightness under multi-physics coupling is established. Third, by integrating the straightness and perpendicularity degradation laws, a time-varying equation for whole-machine spatial accuracy is derived, clarifying the mapping relationship of multi-level time-varying factors. Finally, using the accuracy degradation rate as an evaluation index, the machining and assembly process parameters are optimized through reverse derivation, forming a closed-loop optimization system. This invention is of great significance for improving the accuracy retention of high-end CNC machine tools.

The invention provides an error compensation method and system for a hybrid machine tool, electronic equipment and a storage medium, and relates to the technical field of numerical control machining. The method comprises the following steps: determining a mapping relation between a movable platform pose and a branch chain of a parallel mechanism of the hybrid machine tool to establish a first kinematic model, and determining a geometric error term of a motion axis of a series mechanism of the hybrid machine tool to establish a corresponding inter-axis transformation matrix to establish a second kinematic model, determining a first error amount of a parallel mechanism and a second error amount of a series mechanism of the hybrid machine tool, and performing compensation amount synthesis and re-decomposition on the first error amount and the second error amount according to the first kinematic model and the second kinematic model to determine a corresponding compensation instruction, the space errors of the parallel mechanism and the serial mechanism can be cooperatively compensated, and the compensation precision of the overall space error of the hybrid machine tool is improved.

The application discloses a kind of face gear tooth surface machining error on-machine measurement and correction method considering geometric error, comprising the following steps: step one: on-machine measurement geometric error compensation: 11) builds on-machine measurement platform;12) on-machine measurement geometric error modeling;13) on-machine measurement geometric error identification;14) with the linear axis several errors and rotation axis geometric error obtained by identification, compensate on-machine measurement geometric error;Step two: tooth surface error on-machine measurement: 21) planning measurement point on tooth surface, and obtaining the normal vector of each measurement point;22) establish measurement coordinate system;23) sequentially to each measurement point is measured, obtains the actual tooth surface point of face gear in each measurement point;24) according to the actual tooth surface point of face gear in each measurement point and theoretical tooth surface point, obtains the profile error and pitch error of face gear;25) according to the profile error and pitch error of face gear obtained, to face gear is carried out reverse adjustment correction.

This application relates to the field of machine tool precision design technology, and particularly to a precision design method, apparatus, electronic device, and storage medium for hybrid machine tools. The method includes: acquiring the structural parameters of the hybrid machine tool; determining the vector loop equation of the hybrid machine tool; determining the mapping relationship between the geometric error and the end effector error of the hybrid machine tool based on the vector loop equation; thereby determining the sensitivity index and identifiability index of the hybrid machine tool; and screening target geometric errors that meet preset screening conditions to generate the precision design result of the hybrid machine tool based on the target geometric errors. This solves the problem in related technologies where the identifiability of geometric error terms in subsequent calibration processes is not considered, leading to difficulties in effectively compensating for geometric error terms through tolerance values ​​when the geometric error terms cannot be identified.

The invention discloses a numerical control machine tool geometric error online measurement and compensation method, and relates to the technical field of numerical control machine tool processing, and the method comprises the steps: calibrating a conversion relation among a main shaft infrared binocular measurement unit, an infrared binocular measurement unit coordinate system and a machine tool coordinate system; the main shaft and the clamp are moved to all positions of a machining area respectively, the measured infrared light source center coordinates under the coordinate system of the infrared binocular measurement unit are converted into coordinates under the coordinate system of a machine tool, and the actual geometric tracks of the main shaft and the clamp are obtained; establishing an error compensation model based on a BLSTM-MHA-TCN algorithm, and acquiring coordinates under a machine tool coordinate system in real time by using two infrared binocular measurement units; and comparing the actual geometric trajectory with the theoretical geometric trajectory to obtain a dynamic geometric error, and correcting the geometric trajectory in real time according to an error compensation model. The device is easy to install, low in cost and capable of achieving high-precision online measurement.

The application discloses a kind of in-situ detection method and system of time-controlled grinding machine tool based on error separation, method includes the following steps: separation time-controlled grinding machine tool Y axis Z direction straightness error E ZY ,X axis Z direction straightness error E ZX And angle error E AX Then according to time-controlled grinding machine tool Y axis Z direction straightness error E ZY ,X axis Z direction straightness error E ZX And angle error E AX Calculated geometry error;Separate the temperature drift deviation of workpiece two ends of time-controlled grinding machine tool, calculate total temperature drift error according to the temperature drift deviation of workpiece two ends;With the geometry error and total temperature drift error, workpiece surface type is compensated, and the final measurement surface type of workpiece is obtained.The application overcomes the influence of the geometry error and thermal drift error of time-controlled grinding machine tool on in-situ measurement accuracy.

The application relates to the technical field of three-dimensional error modeling, in particular to a key error identification method for a tool curved surface of a five-axis numerical control grinding machine, and more particularly to a key error identification method for a tool curved surface of a five-axis numerical control grinding machine, which comprises the following steps: step 1: obtaining a three-dimensional structure model of the five-axis grinding machine, and constructing a three-dimensional pose error model of each working component in the five-axis grinding machine, wherein the three-dimensional pose error model is the pose error between the ideal position and the actual position of each working component; wherein the pose error comprises a plurality of position-independent geometric errors and a plurality of position-dependent geometric errors; the application breaks through the limitation of a single analysis method, significantly improves the robustness and reliability of key error identification, and provides a core theoretical basis for subsequent accurate error compensation and efficient improvement of the machining precision of the five-axis grinding machine.

The invention relates to a sensitivity analysis method for key errors in geometric errors of a numerical control machine tool based on error accumulation, and aims to solve the problem that the overall influence of each error reflected on the precision of a workpiece when the motion range of each axis is different cannot be reflected by the original geometric error sensitivity analysis by utilizing a projection formula. According to the method provided by the invention, on the basis of a projection formula, the overall influence of a single error reflected on the workpiece precision when the motion ranges of all the shafts are different is captured in a mode of independently integrating the motion ranges of all the shafts, so that the calculated amount is reduced, and the whole machine tool motion space does not need to be analyzed; and key errors during machining of different machined workpieces can be analyzed. And then based on a multi-body system theory, a topological structure and a comprehensive error model of the AC double-turntable five-axis numerical control machine tool are established by applying a homogeneous coordinate transformation method, partial differential calculation of all 41 geometric errors on the comprehensive error model can be completed, and the method has an important influence on improvement of the surface precision of a machined workpiece.

The invention relates to a device and a method for compensating errors of a numerically controlled machine tool having at least one controllable machining axis for relative positioning of at least one workpiece with respect to one or more machining devices. The method comprises detecting actual measurement values of at least one input variable describing a state of the machine tool by means of sensors on the machine tool, providing at least one compensation parameter to be used by a control device of the machine tool to the control device of the machine tool, and compensating errors on the machine tool based on the compensation parameter provided to the control device. The compensation comprises compensation of thermal errors, compensation of geometric errors and compensation of errors based on mechanical dynamics.

The present application belongs to the technical field of error measurement of numerical control machine tool, and discloses a machine tool rotary table error measurement method based on a trigger type probe. Firstly, the geometric error elements and kinematics of the rotary table are analyzed, and a geometric error model of the rotary table is established; then, a contact type probe and a standard ball are combined to determine an error measurement mode, the center coordinates of the standard ball are calculated by using the probe readings at different rotary angles of the rotary table, and the three-direction displacement deviations of the center of the standard ball are calculated at different rotary angles of the rotary table according to the measurement mode; finally, the center coordinates of the ball and the three-direction displacement deviations calculated by measurement are combined with the geometric error model to identify all the 20 geometric errors of the rotary table of the five-axis numerical control machine tool. The error measurement method proposed in the present application can effectively separate the geometric errors irrelevant to the rotary shaft position and the geometric errors relevant to the rotary shaft position, has low requirements for the installation precision of the measurement tool, simple measurement mode, and full error items.

The application relates to a geometric model repairing method, device, equipment and program product, and relates to the technical field of computers. The method comprises the following steps: acquiring an error region image of a target geometric error in a model to be repaired and error description information of the target geometric error; determining an error repairing strategy matched with the target geometric error according to the error region image and the error description information; and repairing the target geometric error according to the error repairing strategy. The method can accurately determine the error repairing strategy matched with the target geometric error, and improves the success rate of repairing the target geometric error.

The application discloses a kind of gear axial rolling forming machine tool geometric pose error modeling method and system, belong to metal processing and error transmission modeling technical field.The method includes: the topological graph of axial rolling machine tool is constructed;Based on topological graph, obtain geometric pose error;According to the basis of homogeneous coordinate transformation theory, deduce basic change matrix;Based on basic change matrix, obtain the error-free motion change matrix of roll wheel coordinate system and workpiece coordinate system;Based on error-free motion change matrix, obtain the actual pose error matrix of roll wheel coordinate system and workpiece coordinate system under the condition that there is geometric error;Establish the involute tooth surface equation of roll wheel under roll wheel coordinate, and obtain the workpiece tooth surface pose error equation based on tooth surface equation and actual pose error matrix;Based on geometric pose error and workpiece tooth surface pose error equation, the pose error modeling of axial rolling machine tool is established.The application accurately describes the influence of machine tool geometric error on workpiece tooth surface.