Oscillating cycloid dividing self-adapting correction system and method based on thermal deformation

Abstract

The present application relates to the technical field of hot deformation correction, in particular to a cycloid rotation division adaptive correction system and method based on thermal deformation, which comprises: a data acquisition module for collecting parameters and digitally modeling the initial shape of the workpiece to-be-processed area; an ideal shape calculation module for calculating the ideal processed shape of the to-be-processed area at the nth moment, and the ideal contact time and contact duration of the cutter and each to-be-processed area based on the cycloid trajectory equation; a shape estimation module for identifying the actual contact parameters based on the power detection parameters, establishing the mapping relationship between the contact parameter deviation and thermal deformation, and then estimating the actual processed shape; a compensation execution module for adaptively adjusting the processing parameters to correct the influence of thermal deformation based on the deviation between the actual processed shape and the ideal processed shape. The present application can avoid environmental interference during processing, ensure accurate detection data, accurately detect and correct thermal deformation, and improve the processing accuracy of cycloid rotation division.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal deformation correction, in particular to a cycloid rotation division adaptive correction system and method based on thermal deformation. BACKGROUND

[0002] Cycloid rotation division machining is a high-efficiency and precise gear profile machining process. Through the precise linkage of the synchronous division movement of the workpiece and the cycloid envelope movement of the cutter, the continuous forming of gear, spline and other parts is realized. Due to its smooth cutting, high-quality tooth surface, green environmental protection and other advantages, it is widely used in high-end equipment manufacturing fields such as automobiles and aerospace. In the process of cycloid rotation division machining, the thermal deformation of the cutter and the workpiece is a key factor affecting the machining precision. The cutter will be elongated in the axial direction, deviated in the radial direction and tilted in the attitude due to heat. The workpiece will have thermal drift of the division reference and local thermal expansion of the tooth surface due to heat. These deformations directly lead to the deviation of the cycloid envelope trajectory, the tooth thickness deviation and the tooth direction error. In severe cases, the precision of the parts will exceed the design requirements, so it is necessary to detect the thermal deformation data in real time to provide a basis for subsequent compensation correction.

[0003] The existing thermal deformation detection of cycloid rotation division machining mainly relies on sensors (such as laser displacement sensors and eddy current sensors). The sensors capture the displacement changes of the cutter edge and the workpiece reference surface to obtain the deformation. However, the process characteristics of cycloid rotation division machining make the sensor detection data prone to interference, which further leads to precision distortion. On the one hand, the direct interference of the flying chips. Cycloid rotation division machining is a continuous envelope cutting process, which produces a large amount of continuous cycloid columnar chips. These chips are in a high-speed flying state and are easy to block the detection light path of the sensor, causing the sensor to fail to accurately capture the real position of the target detection surface, resulting in data jumping. At the same time, if some high-temperature chips adhere to the surface of the sensor probe, they will change the detection reference of the sensor, further exacerbating the data distortion. On the other hand, the indirect interference of cutting vibration. In the process of cycloid rotation division machining, the continuous line contact between the cutter and the workpiece will produce periodic cutting force, causing micro-vibration of the machine tool, cutter and workpiece system. The vibration will cause the instantaneous displacement of the detection target surface to fluctuate, and the sensor sampling data cannot distinguish between thermal deformation displacement and vibration displacement, resulting in a deviation in the calculation of the deformation and failing to reflect the true thermal deformation state.

[0004] The precision distortion problem of the above-mentioned sensor detection data leads to a lack of reliable data basis for subsequent thermal deformation compensation correction. The compensation system outputs correction values that do not match the actual thermal deformation based on distorted data, which can easily result in insufficient correction or excessive correction. Ultimately, it cannot effectively suppress the influence of thermal deformation on machining precision. SUMMARY

[0005] To solve the above problems, the application provides a hot deformation detection and correction scheme capable of avoiding interference of processing environment and ensuring accuracy of detection data, so as to improve the cycloid rotation processing precision.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0007] In one aspect, a cycloid rotation self-adaptive correction system based on thermal deformation is provided, comprising:

[0008] A data acquisition module is configured to acquire workpiece parameters, tool parameters, initial parameters of a blank, and power detection parameters, and perform digital modeling of an initial shape of a workpiece region to be processed;

[0009] An ideal shape calculation module is configured to calculate an ideal processed shape of the region to be processed at the nth moment based on a cycloid trajectory equation, and an ideal contact time and a contact duration of the tool and each region to be processed;

[0010] A shape estimation module comprises a power sensor, configured to identify actual contact parameters based on the power detection parameters, establish a mapping relationship between contact parameter deviation and thermal deformation, and further estimate an actual processed shape;

[0011] A compensation execution module is configured to adaptively adjust processing parameters based on the deviation between the actual processed shape and the ideal processed shape to correct the influence of thermal deformation.

[0012] Further, the workpiece parameters include a workpiece modulus, a tooth number, a tooth width, a pitch circle radius, and a workpiece thermal expansion coefficient;

[0013] The tool parameters include a tool edge radius, an eccentric distance, a tool length, and a tool thermal expansion coefficient;

[0014] The initial parameters of the blank include an initial outer diameter of the blank, a clamping reference surface size, and an initial shape of the region to be processed;

[0015] The power detection parameters include a power sensor sampling frequency, a power mutation threshold, and a power drop threshold.

[0016] Further, the data acquisition module performs digital modeling of the initial shape in the following manner:

[0017] CAD modeling: importing initial parameters of the blank to generate a blank entity, measuring an initial position angle of a tooth slot , drawing a boundary of the region to be processed, along the Z-axis range being 0≤Z≤H, and H being a thickness of the blank entity; along the circumferential range being , wherein z is the tooth number;

[0018] Mathematical modeling: establishing a workpiece coordinate system, with the Z-axis being a blank axis and the origin being a center of an end face, generating a blank surface equation Wherein, X, Y are radial two-dimensional coordinate variables in the workpiece coordinate system, D is the initial outer diameter of the blank, is the coordinate matrix of the discrete machining area, and the step is 0.001 mm.

[0019] Further, the ideal shape calculation module specifically comprises:

[0020] Based on the cycloid envelope principle, the tool edge inner cycloid trajectory equation is constructed, the cycloid trajectory is stretched along the Z axis to generate a cycloid cylinder, and a Boolean subtraction operation is performed between the cycloid cylinder and the blank entity to obtain the ideal machined shape of a single tooth groove.

[0021] According to the division time interval Discrete time points, the number of teeth completed cutting and the corresponding ideal machined shape at the nth time are iteratively calculated.

[0022] The ideal contact time of the tool and each machining area is calculated Wherein, i=1, 2, …, z is the tooth number of the workpiece.

[0023] The ideal contact duration of the tool and each machining area is calculated Wherein, z is the number of teeth, is the spindle speed of the workpiece.

[0024] Further, in the shape estimation module, the power sensor is signal connected with the workpiece shaft driving end and the tool shaft driving end, and is used for collecting the power of the workpiece shaft driving end and the power of the tool shaft driving end.

[0025] The calibration method of the power detection threshold value is: before machining, the workpiece shaft and the tool shaft are made to idle, and the no-load power is recorded The contact determination threshold value is set Wherein, p is the contact determination threshold value offset, and the value is 5-20, and the separation determination threshold value is Wherein, q is the separation determination threshold value offset, and the value is 1-5.

[0026] Further, the logic of the shape estimation module for identifying the actual contact parameters is:

[0027] The actual contact time When the power signal suddenly increases from to , the time is recorded;

[0028] The actual separation time When the power signal suddenly decreases from to , the time is recorded;

[0029] The actual contact duration is: .

[0030] Further, the shape estimation module establishes a contact parameter deviation and thermal deformation mapping relationship as follows:

[0031] Contact time deviation , At this time, the corresponding workpiece radial thermal expansion or tool radial offset, deformation variable , is the cycloid linear velocity;

[0032] Contact time deviation , At this time, the corresponding workpiece axial thermal expansion or tool axial elongation, deformation variable , is the axial feed speed.

[0033] Further, the machining parameters adjusted by the compensation execution module include cycloid amplitude A, axial compensation amount and index angle compensation amount , and the adjustment formulas are as follows:

[0034] , is the adjusted cycloid amplitude, is the initial cycloid amplitude, R is the workpiece index circle radius, and r is the tool edge radius; the adjustment constraint range is: ;

[0035] ; is the adjusted workpiece axial compensation amount, is the tool axial deformation variable, and the adjustment constraint range is: ;

[0036] ; wherein, is the adjusted index angle compensation amount, is the contact time deviation of the tool and the workpiece, and the adjustment constraint range is: .

[0037] Further, the adaptive iteration mechanism of the compensation execution module includes:

[0038] Real-time adjustment: after completing 1 tooth groove machining, the adjustment parameters are simultaneously issued to the numerical control system;

[0039] Steady-state correction: when and for 3 consecutive tooth grooves,

[0040] Abnormal protection: or , pause the machining and issue a warning.

[0041] In another aspect, a cycloid rotation division adaptive correction method based on thermal deformation is provided, comprising the following steps:

[0042] Step 1: Collecting workpiece parameters, tool parameters, blank initial parameters and power detection parameters, performing CAD modeling and mathematical modeling to realize the digitization of the initial shape of the to-be-processed area;

[0043] Step 2: Calculating the ideal machined shape of the to-be-processed area at the nth moment and the ideal contact time and contact duration of the tool and each to-be-processed area based on the cycloid trajectory equation;

[0044] Step 3: Collecting power signals through power sensors at the driving end of the workpiece shaft and the tool shaft, identifying actual contact parameters based on power detection parameters, establishing a deviation and thermal deformation mapping relationship, and estimating the actual machined shape;

[0045] Step 4: Based on the deviation between the actual machined shape and the ideal machined shape, adaptively adjusting the machining parameters to correct the influence of thermal deformation.

[0046] The above scheme has the following beneficial effects:

[0047] 1. The workpiece shaft and tool shaft power signals are used as detection basis in this scheme to determine the contact time by power surge and the separation time by power drop, without the need for additional installation of complex displacement or vision sensors, thus avoiding problems such as chip obstruction and vibration interference, realizing stable and reliable identification of contact parameters in complex machining environment, and solving the problem of low detection data reliability in the prior art.

[0048] This scheme establishes a mapping relationship between contact parameter deviation and thermal deformation, and can quickly quantify radial / axial deformation by contact time difference and contact duration difference, without the need for redundant parameter input, thus simplifying the modeling process, realizing dynamic tracking and real-time estimation of thermal deformation, and solving the limitation of static modeling in the prior art that cannot adapt to dynamic machining conditions.

[0049] 2. This scheme utilizes the power signal resources of the existing shaft system of the machine tool, without the need for adding special detection devices, and can realize the core detection function through power sensor calibration and signal analysis, greatly reducing the system modification and implementation cost, being compatible with mainstream numerical control systems, adapting to the upgrading of existing cycloid rotation division machines, and solving the problem of weak engineering practicability and difficulty in large-scale promotion in the prior art.

[0050] This scheme designs a targeted adaptive adjustment strategy, adjusts the cycloid amplitude for radial thermal deformation, adjusts the axial compensation amount for axial thermal deformation, and adjusts the indexing angle compensation amount for indexing reference drift, accurately matches the influence of different types of thermal deformation, ensures the linkage stability of cycloid envelope and indexing motion, and effectively offsets problems such as tooth profile deviation and tooth thickness deviation.

[0051] 3. This solution enables the synchronous parallel processing of the correction process and the machining process. Adjustment parameters can be issued in real time after each tooth groove is machined without stopping the machine for calibration. While ensuring that the machining accuracy meets the standards, it retains the high efficiency characteristics of cycloidal rotary machining to the maximum extent, achieving synergistic optimization of accuracy improvement and production capacity guarantee, and solving the contradiction between accuracy and efficiency in existing technologies. Attached Figure Description

[0052] Figure 1 This is a system architecture diagram of an embodiment of the present invention;

[0053] Figure 2 This is a flowchart of a method according to an embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram showing the correspondence between power signals and contact parameters in an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram comparing the ideal and actual processed shapes of an embodiment of the present invention. Detailed Implementation

[0056] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] The following detailed description illustrates the specific implementation method:

[0058] Implementation, for example, attached Figure 1 - Appendix Figure 4 As shown: The cycloidal spin-division adaptive correction system based on thermal deformation includes: a data acquisition module, an ideal shape calculation module, a shape prediction module, and a compensation execution module.

[0059] The data acquisition module is used to collect workpiece parameters, tool parameters, initial blank parameters, and power detection parameters.

[0060] Specifically, the workpiece parameters include the workpiece module m, the number of teeth z, the tooth width B, the workpiece pitch circle radius R, and the workpiece thermal expansion coefficient. The workpiece module m, number of teeth z, tooth width B, and workpiece pitch circle radius R are all design parameters, obtained directly from design drawings or the machine tool CNC system; the workpiece thermal expansion coefficient... Based on workpiece material acquisition.

[0061] Specifically, the tool parameters include the tool cutting edge radius r, the eccentricity e, the tool length L, and the tool thermal expansion coefficient. ; the tool edge radius r, the eccentricity e and the tool length L are basic parameters of the tool, which are directly obtained based on tool description or a numerical control system of a machine tool; the tool thermal expansion coefficient is obtained based on the tool material.

[0062] Specifically, the initial parameters of the blank include an initial outer diameter D of the blank, a clamping reference surface size and an initial shape of a region to be machined; the initial parameters of the blank are obtained by a three-coordinate measuring machine.

[0063] Specifically, the power detection parameters include a sampling frequency of a power sensor, a power mutation threshold and a power sudden drop threshold ; the power detection parameters are obtained based on calibration of the power sensor; the power sensor of the embodiment is signal connected with a driving end of a workpiece shaft and a driving end of a tool shaft, and is used to collect power of the driving end of the workpiece shaft and the driving end of the tool shaft.

[0064] The data acquisition module is also used to realize digitization of an initial shape of a workpiece based on CAD modeling and mathematical modeling.

[0065] Specifically, initial parameters of a blank are imported to generate a blank entity, an initial position angle of a tooth groove is measured by a three-coordinate measuring machine , and a boundary of a region to be machined is drawn (0≤Z≤H (H is the thickness of the blank entity) along the z axis, and along the circumference).

[0066] Specifically, a workpiece coordinate system is established, the z axis is the axis, and the origin is the center of the end face, and a surface equation of the blank entity is generated , wherein X and Y are radial two-dimensional coordinate variables in the workpiece coordinate system, D is the initial outer diameter of the blank, a coordinate matrix of the region to be machined is discretized, and the step is 0.001 mm, which is used for subsequent ideal machined shape calculation.

[0067] The ideal shape calculation module is used for ideal machined shape calculation at the nth moment.

[0068] Firstly, cycloid rotation division ideal forming modeling is performed; based on the cycloid envelope principle, the embodiment constructs a tool edge inner cycloid trajectory equation to calculate an ideal removal region:

[0069] Cycloid trajectory equation:

[0070]

[0071] , wherein is the tool cycloid angular velocity, R is the workpiece index circle radius, r is the tool edge radius, is the axial feed speed, is the workpiece spindle speed, and t is the cycloid rotation division machining time.

[0072] Ideal removal area calculation: stretch the cycloid trajectory along the Z axis to generate a cycloid cylinder, perform a Boolean subtraction operation with the blank model, and obtain the ideal machined shape of a single tooth slot.

[0073] Then, the ideal shape iteration calculation at the nth moment is performed:

[0074] According to the indexing time interval , the discrete time points , is the total machining time;

[0075] The number of teeth that have been machined at the nth moment , that is, under ideal conditions, one tooth is machined in one indexing interval;

[0076] Synchronously generate the ideal machined shape at the current moment (the model after removing the first k tooth slots) and the ideal shape of the (n+1)th tooth, and save them as coordinate matrices for subsequent comparison.

[0077] The ideal shape calculation module is also used to calculate the ideal contact time and contact duration of the tool with each to-be-machined area.

[0078] 1. Ideal contact time: the ideal starting time of the ith tooth is the sum of the previous i-1 indexing intervals, and the ending time is the starting time + indexing interval, the formula is:

[0079]

[0080] 2. Ideal contact duration: to ensure synchronization between cycloid envelope and indexing, the contact duration is equal to the indexing time interval, that is:

[0081]

[0082] Based on the above, under ideal conditions, power surges should occur at , and power drops should occur at .

[0083] The shape estimation module is used for actual contact parameter detection and actual machined shape estimation.

[0084] The actual contact parameter detection of the embodiment is realized by a power sensor, and the power sensor is preferably a high-frequency power sensor with a sampling frequency of 1 kHz and a measurement accuracy of ±0.1 W; a data acquisition module acquires the power signal collected by the power sensor in real time and synchronously delivers it to the shape estimation module. Specifically, before cycloid rotary division machining is performed, the workpiece shaft and the tool shaft are idled, the no-load power is recorded, and the contact determination threshold is set, where the preferred range of p is 5-20, and the power surge to this value is defined as the contact between the tool and the workpiece; the separation determination threshold Where q is preferably in the range of 1-5, defining the power dip to this value as the separation of the tool from the workpiece.

[0085] Contact parameter identification:

[0086] Actual contact time : When the power signal jumps from to , record this time;

[0087] Actual separation time : When the power signal drops from to , record this time;

[0088] Actual contact duration: .

[0089] Contact parameter deviation modeling, defining two core deviation indicators, establishing a mapping relationship with thermal deformation:

[0090] Contact time deviation , if is negative, it indicates that the tool and the workpiece contact in advance; if is positive, it indicates that the tool and the workpiece contact late;

[0091] Contact duration deviation: , if is negative, it indicates that the tool and the workpiece contact duration becomes shorter; if is positive, it indicates that the tool and the workpiece contact duration becomes longer;

[0092] The tool and the workpiece are usually affected by high-temperature thermal deformation, resulting in early contact of the tool and the workpiece and longer contact duration of the tool and the workpiece:

[0093] When the tool and the workpiece contact in advance, it indicates that the workpiece radially expands or the tool radially deviates, and the deformation amount calculation formula is: , is the cycloid linear velocity;

[0094] When the tool and the workpiece contact duration becomes longer, it indicates that the workpiece axially expands or the tool axially elongates, and the deformation amount calculation formula is: , is the axial feed speed.

[0095] Actual machined shape estimation:

[0096] First, the actual removal area is corrected, actual removal area = ideal removal area + thermal deformation additional removal area (radial corresponding to radial expansion, axial corresponding to the axial extension); then, the coordinate matrix is updated, the coordinate points corresponding to the ideal removal area and the additional removal area are removed from the initial shape coordinate matrix, the three-dimensional curved surface is refitted, and the actual machined shape is obtained; finally, the shape deviation is quantified, and the tooth thickness deviation between the actual and ideal machined shapes is calculated , tooth direction error , is the tooth helix angle of the workpiece.

[0097] The compensation execution module is used for adaptive adjustment of the machining parameters.

[0098] The compensation execution module follows the following adjustment parameters and calculation logic:

[0099] 1. Thermal deformation type: radial thermal expansion of the workpiece / diaclinal offset of the tool; adjustment parameter: cycloid amplitude A; adjustment formula: , wherein is the adjusted cycloid amplitude, is the initial cycloid amplitude, ; adjustment constraint range: .

[0100] 2. Thermal deformation type: axial thermal expansion of the workpiece / axial elongation of the tool; adjustment parameter: axial compensation amount ; adjustment formula: ; is the adjusted axial compensation amount of the workpiece, is the axial deformation amount of the tool, and the adjustment constraint range is: .

[0101] 3. Thermal deformation type: thermal drift of the index reference of the workpiece; adjustment parameter: index angle compensation amount ; adjustment formula: ; wherein is the adjusted index angle compensation amount, is the contact time deviation of the tool and the workpiece, and the adjustment constraint range is: .

[0102] The adaptive iteration mechanism is as follows:

[0103] 1. Real-time adjustment: after completing the cutting of one tooth, the , are calculated, and the adjustment parameters are simultaneously issued to the numerical control system.

[0104] 2. Steady-state correction: when the of three consecutive teeth and , the steady state is entered, the adjustment frequency is reduced, and overcorrection is avoided.

[0105] 3. Abnormal protection: if or threshold, the embodiment is preset or If so, the machining is paused, and the tool / workpiece temperature is prompted to be checked to avoid precision out-of-tolerance.

[0106] The method corresponding to the system of the embodiment includes the following steps:

[0107] Step 1: Collecting workpiece parameters, tool parameters, blank initial parameters and power detection parameters, performing CAD modeling and mathematical modeling to realize the digitization of the initial shape of the to-be-machined area;

[0108] Step 2: Calculating the ideal machined shape of the to-be-machined area at the nth moment and the ideal contact time and contact duration of the tool and each to-be-machined area based on the cycloid trajectory equation;

[0109] Step 3: Collecting power signals through the power sensors of the workpiece shaft and the driving end of the tool shaft, identifying actual contact parameters based on the power detection parameters, establishing a deviation and thermal deformation mapping relationship, and estimating the actual machined shape;

[0110] Step 4: Based on the deviation between the actual machined shape and the ideal machined shape, adaptively adjusting the machining parameters to correct the influence of thermal deformation.

[0111] As shown in Figure 3 and Figure 4 , the specific implementation is as follows:

[0112] Workpiece parameters: module m=2mm, number of teeth z=20, tooth width B=15mm, pitch circle radius R=20mm, material is 40Cr (thermal expansion coefficient );

[0113] Tool parameters: circular-arc-blade cycloid tool, blade edge radius r=3mm, eccentricity e=0.5mm, tool length L=100mm, material is hard alloy (thermal expansion coefficient );

[0114] Process parameters: workpiece spindle speed , axial feed speed , tool cycloid angular velocity , initial cycloid amplitude ;

[0115] Power detection parameters: no-load power , contact determination threshold , separation determination threshold .

[0116] Calculation of ideal processed shape: based on the cycloid trajectory equation, a discrete coordinate matrix is generated, imported and fitted into a spline curve by UG / NX, and stretched along the Z axis to generate a cycloid cylinder; according to the division time interval Discrete time points, the 51st time (t=5s) has completed 51 (counted in a total of 20 tooth cycles) tooth groove processing, and the ideal processed shape at the current time and the ideal shape of the 52nd tooth are output.

[0117] Calculation of ideal contact parameters: ideal contact time of the 3rd tooth (corresponding to the 52nd tooth): , ; ideal contact duration: .

[0118] Actual contact parameter acquisition and actual shape estimation: power sensor synchronously collects signals, the 3rd tooth power surge time is 0.018s, i.e. ; the 3rd tooth power drop time is 0.032s, i.e. ; the actual contact duration . Contact time deviation: (early contact), contact duration deviation: (duration becomes longer).

[0119] Based on the above, the thermal deformation variable ; is calculated. Estimation of actual processed shape: correct the ideal removal area, calculate the tooth thickness deviation , and the tooth direction error .

[0120] Based on the above, the processing parameters are adjusted adaptively: the adjusted cycloid amplitude , the adjusted axial compensation amount , and the adjusted division angle compensation amount . Through the adaptive adjustment module, the parameters are sent to the numerical control system of the cycloid dividing machine tool, and the parameters take effect during the processing of the fourth tooth.

[0121] Obviously, the above embodiments are only examples for the sake of clarity, and are not limiting of the embodiments. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A system for adaptive correction of a cycloidal decoupling based on thermal distortion, characterized in that, include: The data acquisition module is used to collect workpiece parameters, tool parameters, initial blank parameters and power detection parameters, and to perform digital modeling of the initial shape of the workpiece's processing area; The ideal shape calculation module is used to calculate the ideal machined shape of the area to be machined at time n based on the cycloidal trajectory equation, as well as the ideal contact time and contact duration between the tool and each area to be machined; The shape prediction module includes a power sensor, which is used to identify actual contact parameters based on power detection parameters, establish a mapping relationship between contact parameter deviation and thermal deformation, and then predict the actual processed shape. In the shape prediction module, the power sensor is connected to the workpiece axis drive end and the tool axis drive end to collect the power of the workpiece axis drive end and the tool axis drive end. The calibration of the power detection threshold is as follows: before processing, the workpiece shaft and the cutter shaft are idling, and the no-load power is recorded , the contact determination threshold is set , wherein p is the contact determination threshold offset, and the value is 5-20, the separation determination threshold , wherein q is the separation determination threshold offset, and the value is 1-5; The logic for the shape estimation module to identify actual contact parameters is as follows: actual contact time : when the power signal jumps from , the time is recorded;​ Actual separation time : When the power signal from : Sudden drop to , record this time Actual contact time: ; The shape prediction module establishes a mapping relationship between contact parameter deviation and thermal deformation as follows: Contact timing deviation ,in This refers to the ideal contact moment between the cutting tool and each area to be machined. At that time, the deformation corresponds to the radial thermal expansion of the workpiece or the radial offset of the tool. ,in The linear velocity of the cycloid; Contact duration deviation ,in The ideal contact time between the cutting tool and each area to be machined. At that time, the deformation corresponds to the axial thermal expansion of the workpiece or the axial elongation of the tool. ,in, This refers to the axial feed rate; The compensation execution module is used to adaptively adjust the processing parameters to correct the effects of thermal deformation based on the deviation between the actual processed shape and the ideal processed shape. The ideal shape calculation module specifically includes: Based on the principle of cycloidal envelope, the equation for the cycloidal trajectory within the cutting edge of the tool is constructed: ； in, R is the cycloidal angular velocity of the tool, R is the workpiece pitch circle radius, and r is the tool cutting edge radius. This refers to the axial feed rate. t is the spindle speed of the workpiece, and t is the cycloidal rotation time. The cycloidal trajectory is stretched along the Z-axis to generate a cycloidal cylinder, and a Boolean subtraction operation is performed with the blank entity to obtain the ideal machined shape of a single tooth groove; According to the time interval of the division At discrete time points, iteratively calculate the number of teeth that have been cut and the corresponding ideal machined shape at time n. Calculate the ideal contact time between the tool and each area to be machined: ； Where i = 1, 2, ..., z are the workpiece tooth numbers; Calculate the ideal contact time between the tool and each area to be machined. Where z is the number of teeth, The spindle speed is the speed of the workpiece.

2. The adaptive correction system for cycloidal spin division based on thermal deformation according to claim 1, characterized in that, The workpiece parameters include: workpiece module, number of teeth, tooth width, pitch circle radius, and workpiece thermal expansion coefficient; The tool parameters include: tool cutting edge radius, eccentricity, tool length, and tool thermal expansion coefficient; The initial parameters of the blank include: the initial outer diameter of the blank, the size of the clamping reference surface, and the initial shape of the area to be processed; The power detection parameters include: power sensor sampling frequency, power surge threshold, and power drop threshold.

3. The adaptive correction system for cycloidal spin division based on thermal deformation according to claim 1, characterized in that, The data acquisition module performs initial shape digital modeling in the following way: CAD modeling: Import initial parameters of the billet to generate the billet solid, and measure the initial position angle of the tooth groove. Draw the boundary of the area to be processed, with the range along the Z-axis being 0 ≤ Z ≤ H, where H is the thickness of the blank; and the range along the circumference being... Where z is the number of teeth; Mathematical modeling: Establish a workpiece coordinate system, with the Z-axis as the blank axis and the origin as the center of the end face circle, and generate the blank surface equation. Where X and Y are radial two-dimensional coordinate variables in the workpiece coordinate system, D is the initial outer diameter of the blank, and the coordinate matrix of the discrete processing area has a step size of 0.001 mm.

4. The adaptive correction system for cycloidal spin division based on thermal deformation according to claim 1, characterized in that, The processing parameters adjusted by the compensation execution module include cycloidal amplitude A and axial compensation amount. and the compensation amount of the division angle The adjustment formulas are as follows: ,in, The initial cycloidal amplitude, R is the workpiece pitch circle radius, and r is the tool cutting edge radius; Adjustment constraint range: ; Adjusting the constraint range: ; ,in Adjusting the constraint range: .

5. The adaptive correction system for cycloidal spin division based on thermal deformation according to claim 4, characterized in that, The adaptive iterative mechanism of the compensation execution module includes: Real-time adjustment: After each tooth groove is machined, adjustment parameters are simultaneously sent to the CNC system; Steady-state correction: three consecutive tooth grooves and When necessary, reduce the adjustment frequency; Anomaly protection: or If necessary, processing will be suspended and an early warning will be issued.

6. A cycloidal spin-complement adaptive correction method based on thermal deformation, performed using the cycloidal spin-complement adaptive correction system based on thermal deformation as described in any one of claims 1-5, characterized in that... Includes the following steps: Step 1: Collect workpiece parameters, tool parameters, initial blank parameters, and power detection parameters, and perform CAD modeling and mathematical modeling to realize the initial shape digitization of the area to be processed; Step 2: Calculate the ideal machined shape of the area to be machined at time n, as well as the ideal contact time and contact duration between the tool and each area to be machined, based on the cycloidal trajectory equation; Step 3: Collect power signals through power sensors at the drive ends of the workpiece axis and the tool axis, identify actual contact parameters based on power detection parameters, establish the mapping relationship between deviation and thermal deformation, and predict the actual machined shape; Step 4: Based on the deviation between the actual processed shape and the ideal processed shape, adaptively adjust the processing parameters to correct the influence of thermal deformation.

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