Error correction method and system for hypoid gear machining parameters, terminal and medium

Abstract

The invention belongs to the technical field of gear machining, and particularly discloses a hypoid gear machining parameter error correction method and system, a terminal and a medium. Comprising the steps that tooth surface detection is conducted on a machined hypoid gear, actual tooth surface data are obtained and compared with target tooth surface data, and tooth surface error distribution is obtained; according to the distribution characteristics of the tooth surface errors in the gear tooth surface space, directional characteristic division is conducted on the tooth surface errors, and tooth surface error characteristics in the tooth length direction and the tooth height direction are obtained; machining parameter correction is determined based on the tooth surface error characteristics, and machining parameters comprise tool angle parameters and tool relative position parameters; the machining parameters are adjusted according to the machining parameter correction amount, and remachining is executed; and tooth surface detection or meshing state evaluation is conducted on the remachined gear, and when the detection result meets the preset requirement, the corresponding machining parameter is determined as the final machining parameter. According to the method, the stability and consistency of the hypoid gear machining process can be improved.

Description

Technical Field

[0001] This invention belongs to the field of gear processing technology, specifically relating to an error correction method, system, terminal, and medium for processing parameters of quasi-hyperboloid gears. Background Technology

[0002] Hypoid gears are widely used in vehicle transmissions, engineering machinery, and heavy-duty transmission systems. Their complex tooth surface geometry means that machining accuracy significantly impacts transmission efficiency, noise levels, and service reliability. In actual production, hypoid gears typically undergo multiple processes, including design modeling, machine tool processing, heat treatment, and finishing. The tooth surface machining results are easily affected by factors such as machine tool installation errors, tool parameter deviations, and process fluctuations, resulting in unavoidable tooth surface errors between the actual and designed tooth surfaces.

[0003] In the prior art, in order to improve the tooth surface quality of hypoid gears, tooth surface inspection equipment is usually used to inspect the finished gears, obtain tooth surface error distribution or contact spot information, and adjust the processing parameters based on the inspection results.

[0004] The relevant adjustment process often relies on the experience and judgment of the machining personnel, or on correcting individual machine tool parameters for a single error phenomenon. Under complex tooth surface conditions, simple parameter adjustment methods often fail to take into account the error distribution characteristics in the tooth length direction and tooth height direction, and are prone to introducing new tooth surface deviations while correcting errors in a certain direction.

[0005] Furthermore, in actual production, the machining parameters for hypoid gears typically include tool angle parameters and relative position parameters between the tool and the workpiece, and there are coupling relationships between these multiple machining parameters. When multiple machining parameters are adjusted simultaneously, it can easily lead to instability in the parameter correction process, increase the number of trial cuts, prolong the production cycle, and even cause fluctuations in tooth surface quality. Summary of the Invention

[0006] This invention addresses the problems in existing technologies by providing an error correction method, system, terminal, and medium for quasi-hypoid gear machining parameters. It solves the problem that, under complex tooth surface conditions, simple parameter adjustment methods often fail to simultaneously consider the error distribution characteristics in both the tooth length and tooth height directions, easily introducing new tooth surface deviations while correcting errors in one direction. Furthermore, it resolves the coupling relationship between multiple machining parameters. When multiple machining parameters are adjusted simultaneously, the parameter correction process is prone to instability, increasing the number of trial cuts, extending the production cycle, and even causing fluctuations in tooth surface quality.

[0007] The technical solution adopted in this invention is as follows: In a first aspect, this application provides a method for correcting errors in the machining parameters of quasi-hypoid gears, the method comprising the following steps: The tooth surface of the quasi-hypoid gear after processing is inspected to obtain the actual tooth surface data of the quasi-hypoid gear. The actual tooth surface data is compared with the preset target tooth surface data to obtain the tooth surface error distribution of the quasi-hypoid gear. Based on the distribution characteristics of tooth surface error in the gear tooth surface space, the tooth surface error is divided into directional features to obtain the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction. Based on the tooth surface error characteristics in the tooth length direction and the tooth surface error characteristics in the tooth height direction, the machining parameter correction amount corresponding to the tooth surface error characteristics is determined. Among them, the machining parameters include angular parameters used to characterize the tool angular state and positional parameters used to characterize the relative positional relationship between the tool and the workpiece; The machining parameters of the hypoid gear are adjusted according to the machining parameter correction amount, and the hypoid gear is then re-machined under the adjusted machining parameter conditions. The tooth surface of the re-processed hypoid gear is inspected or the meshing state is evaluated. When the inspection results meet the preset tooth surface accuracy or meshing requirements, the corresponding processing parameters are determined as the final processing parameters of the hypoid gear.

[0008] Furthermore, when determining the machining parameter correction amount, a dominant discrimination is made between the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction: Determine the dominant error direction based on the error amplitude distribution; The machining parameters corresponding to the dominant error direction are determined as the main correction parameters, and the machining parameters corresponding to the non-dominant error direction are determined as auxiliary correction parameters.

[0009] Furthermore, when determining the correction amount of the machining parameters, the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction are divided into multiple error intervals respectively. The corrected weight combination for the angle and position parameters is determined based on the error intervals of the tooth length and tooth height error characteristics.

[0010] Furthermore, when correcting both angle and position parameters simultaneously, independent correction limits are set for different types of machining parameters, and the upper limit of the correction amount of the machining parameters corresponding to the main correction parameters is determined based on the tooth surface error characteristics. The tooth surface error feature is the error intensity value obtained by statistically analyzing the absolute values ​​of errors at multiple tooth surface sampling points in the tooth length or tooth height direction. The upper limit of the machining parameter correction is determined by multiplying the error intensity value with the preset correction coefficient. Different correction coefficients are used when the error intensity value is in different error level ranges. When the correction amount of the main correction parameter exceeds the upper limit of the corresponding correction amount of the machining parameter, the proportion of the correction amount of the auxiliary correction parameter is reduced.

[0011] Furthermore, the error intensity value is determined statistically by sampling multiple tooth surface points along the tooth length or tooth height direction, and the error intensity value E is calculated according to the following formula:

[0012] Where N is the number of sampling points on the tooth surface. For the tooth surface error value corresponding to the i-th tooth surface sampling point, based on the relationship between the error intensity value E and the preset first threshold T1 and second threshold T2, the error level interval is divided into low error interval, medium error interval, and high error interval. Corresponding correction coefficients are selected for each error level interval. , , The upper limit of the correction amount for the main correction parameters of the machining parameters. Determined according to the following formula:

[0013] When the current processing parameter correction amount of the main correction parameter satisfy At the same time, the correction amount of the auxiliary correction parameters for the processing parameters is based on a preset scaling factor. Reduce; in, As a safety margin scaling factor, The auxiliary parameter is the suppression intensity scaling factor. , The preset parameters are determined based on the parameter adjustment capability of the processing equipment, the stability requirements of gear processing, and historical processing experience.

[0014] Furthermore, when dividing the tooth surface error into directional features, the tooth surface is divided into multiple regions. The tooth surface error distribution corresponding to each region is determined based on the tooth surface detection results. When determining the machining parameter correction amount, the contact spot detection results of the re-processed gear are obtained, and the machining parameter correction amount is determined for the tooth surface error characteristics of the region corresponding to the contact spot.

[0015] Furthermore, after completing the reprocessed tooth surface inspection or contact spot inspection, the current inspection result is compared with the previous round of inspection results. Based on the changes in tooth surface error distribution or contact spot changes, it is determined whether to continue performing processing parameter correction. When the inspection result meets the preset requirements, the subsequent processing parameter correction operation is terminated.

[0016] Secondly, this application provides an error correction system for machining parameters of quasi-hypoid gears, used to implement the error correction method for machining parameters of quasi-hypoid gears as described in the first aspect. The system includes: The tooth surface inspection unit is used to inspect the tooth surface of the processed hypoid gear, obtain the actual tooth surface data of the hypoid gear, and compare it with the preset target tooth surface data to obtain the tooth surface error distribution of the hypoid gear. The error feature analysis unit is used to divide the tooth surface error into directional features based on the distribution characteristics of the tooth surface error in the gear tooth surface space, and obtain the tooth surface error features along the tooth length direction and the tooth surface error features along the tooth height direction. The machining parameter correction determination unit is used to determine the machining parameter correction amount corresponding to the tooth surface error characteristics based on the tooth surface error characteristics in the tooth length direction and the tooth surface error characteristics in the tooth height direction. The machining parameters include angular parameters used to characterize the tool angle state and positional parameters used to characterize the relative positional relationship between the tool and the workpiece. The parameter adjustment and control unit is used to adjust the machining parameters of the hypoid gear according to the machining parameter correction amount, and control the hypoid gear to perform remachining operation under the adjusted machining parameter conditions; The result evaluation unit is used to perform tooth surface inspection or meshing state evaluation on the reprocessed hypoid gear. Based on the inspection results, it determines whether the preset tooth surface accuracy requirements or meshing requirements are met, and if the preset requirements are met, it determines the corresponding processing parameters as the final processing parameters of the hypoid gear.

[0017] Thirdly, this application provides a terminal, including: The memory is used to store error correction programs for the machining parameters of hypoid gears; The processor is configured to implement the error correction method for the quasi-hypoid gear machining parameters as described in the first aspect when executing the error correction device for the quasi-hypoid gear machining parameters.

[0018] Fourthly, this application provides a computer-readable storage medium that stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes the error correction method for the quasi-hypoid gear machining parameters as described in the first aspect.

[0019] As can be seen from the above technical solutions, the advantages of the present invention are: By analyzing the tooth surface error based on the actual tooth surface inspection results after gear machining is completed, and comparing the tooth surface error distribution with the target tooth surface, the machining parameters are corrected and remachining is carried out on this basis. This makes the machining parameter adjustment process form a closed loop of inspection-correction-remachining, which helps to reduce the accumulation of tooth surface error caused by inaccurate one-time parameter setting during the machining process, and improves the stability and consistency of the quasi-hypoid gear tooth surface machining results.

[0020] By introducing a dominant discrimination mechanism for tooth surface errors in the tooth length and tooth height directions when determining the correction amount of machining parameters, the main correction parameters and auxiliary correction parameters are distinguished according to the direction of the dominant error. This gives the machining parameter adjustment process a clear correction focus, which helps to avoid indiscriminate adjustment of multiple types of machining parameters, thereby reducing the risk of error amplification caused by parameter coupling.

[0021] By dividing the tooth surface error characteristics in the tooth length and tooth height directions into multiple error intervals, and determining the correction weight combination of angle and position parameters based on the error intervals, the amount of machining parameter correction can be differentiated according to the degree of tooth surface error. This is beneficial to maintain the stability of the parameter correction process under different error states and reduce abrupt adjustments during the correction process.

[0022] By setting machining parameter correction limits for different types of machining parameters when simultaneously correcting angle and position parameters, and determining the upper limit of machining parameter correction for the main correction parameter based on tooth surface error characteristics, and suppressing the machining parameter correction of auxiliary correction parameters when the main correction parameter approaches the upper limit of machining parameter correction, it is beneficial to prevent machining instability caused by simultaneous large-scale adjustment of multiple parameters and improve the controllability of the parameter correction process.

[0023] By introducing an error intensity calculation method based on the error statistics of tooth surface sampling points, and by using preset thresholds and correction coefficients to quantitatively limit the error level range and the upper limit of the machining parameter correction amount, the determination of the machining parameter correction amount has a clear calculation basis, which helps to reduce the subjectivity in the machining parameter correction process and improve the consistency and repeatability between different batches of machining processes.

[0024] By further introducing tooth surface region segmentation based on the directional feature segmentation of tooth surface error, and obtaining the contact spot detection results after reprocessing to determine the amount of machining parameter correction, the machining parameter adjustment can focus on responding to the tooth surface error corresponding to the actual contact area, which is beneficial to improving the matching degree between tooth surface error correction and actual meshing state.

[0025] By comparing the tooth surface error distribution or contact spot detection results of adjacent cycles during the multi-cycle machining parameter correction process, and judging whether to continue machining parameter correction based on the changes in the detection results, it is beneficial to avoid ineffective or excessive correction, reduce the number of trial cuts, and thus improve the efficiency and stability of the hypoid gear machining process. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a step diagram illustrating the error correction method for the machining parameters of the quasi-hyperboloid gear in the embodiment; Figure 2 This is a structural diagram of the error correction system for the machining parameters of the quasi-hyperboloid gear in the embodiment; Figure 3 This is a tooth surface error diagram without parameter back-adjustment in the embodiment; Figure 4 This is a diagram of the tooth surface error after parameter back-adjustment in the embodiment; Figure 5 This is a diagram of the actual contact pattern of the gear after parameter reversal in the embodiment; Figure 6 This is a simulated contact pattern of the gear after parameter adjustment in the embodiment; Figure 7 This is a simulated contact pattern of the gear after parameter reversal in the embodiment. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0029] Please see Figure 1 As shown, this application provides an error correction method for machining parameters of quasi-hypoid gears, including: Step S1: Perform tooth surface inspection on the processed hypoid gear to obtain the actual tooth surface data of the hypoid gear. Compare the actual tooth surface data with the preset target tooth surface data to obtain the tooth surface error distribution of the hypoid gear. In a specific implementation, after the quasi-hypoid gear completes one machining operation, the tooth surface is inspected using a tooth surface inspection device to obtain inspection data reflecting the actual geometric shape of the tooth surface. The tooth surface inspection can employ a tooth surface measurement-based method, scanning multiple points on the tooth surface to form a tooth surface error distribution map. The target tooth surface data can originate from the gear's design model or a pre-set standard tooth surface model. During the inspection process, the actual tooth surface data is compared with the target tooth surface data to obtain the error distribution at different positions on the tooth surface. Through this inspection and comparison process, the tooth surface forming deviation state of the quasi-hypoid gear under the current machining parameters can be intuitively reflected, providing a basis for subsequent error analysis and parameter adjustment.

[0030] Step S2: Based on the distribution characteristics of tooth surface error in the gear tooth surface space, the tooth surface error is divided into directional features to obtain the tooth surface error features along the tooth length direction and the tooth surface error features along the tooth height direction. In a specific implementation, after obtaining the tooth surface error distribution, the distribution pattern of the tooth surface error on the tooth surface is analyzed and processed according to the spatial geometric characteristics of the gear tooth surface. The tooth surface error is statistically differentiated along the gear tooth length direction and the tooth height direction, thereby extracting error feature information reflecting the error variation trend in different directions. This directional feature division method can reflect the differences in the performance of tooth surface error in gear meshing-related directions, helping to identify the main concentration directions of tooth surface error and providing a directional basis for subsequent machining parameter adjustments.

[0031] Step S3: Based on the tooth surface error characteristics in the tooth length direction and the tooth surface error characteristics in the tooth height direction, determine the machining parameter correction amount corresponding to the tooth surface error characteristics; In a specific implementation, based on the tooth surface error features extracted along the tooth length and tooth height directions, the machining parameters involved in the machining process are analyzed in a targeted manner. When the tooth surface error features in a certain direction are more obvious, it can be determined that the machining parameters more closely related to the tooth surface forming in that direction need to be corrected in detail, thereby determining the corresponding machining parameter correction amount. In this way, the determination of the machining parameter correction amount is no longer based on a single empirical judgment, but rather establishes a correspondence with the distribution characteristics of tooth surface errors in different directions.

[0032] Among them, the machining parameters include angular parameters used to characterize the tool angular state and positional parameters used to characterize the relative positional relationship between the tool and the workpiece; In a specific implementation, the machining parameters may include angular parameters related to the tool mounting angle and cutting posture, as well as positional parameters related to the spatial relationship between the tool and the workpiece. Different types of machining parameters have different influence paths on tooth surface forming. By distinguishing machining parameters into angular parameters and positional parameters, the adjustment targets of each type of parameter can be clearly identified during the machining parameter correction process, thereby avoiding untargeted overall adjustments to the machining parameters.

[0033] Step S4: Adjust the machining parameters of the hyperboloid gear according to the machining parameter correction amount, and then re-machine the hyperboloid gear under the adjusted machining parameter conditions; In a specific implementation, the corresponding angle and position parameters are adjusted and set according to the determined machining parameter correction amount, and the adjusted machining parameters are input into the machining equipment control system. The machining equipment performs a remachining operation on the hyperboloid gear under the new machining parameter conditions. By reversing the adjustment of the machining parameters and implementing remachining, the tooth surface errors detected in the previous machining can be corrected, so that the tooth surface forming state gradually approaches the target tooth surface state.

[0034] Step S5: Perform tooth surface inspection or meshing state evaluation on the re-processed hypoid gear. When the inspection results meet the preset tooth surface accuracy or meshing requirements, determine the corresponding processing parameters as the final processing parameters of the hypoid gear.

[0035] In a specific implementation, after reprocessing, the hypoid gear is inspected again to assess the contact patch condition and compare the results with those from the previous round of inspection. If the inspection results show that the tooth surface error distribution or contact patch condition meets the preset tooth surface accuracy or meshing requirements, the current processing parameter configuration is deemed to meet the process requirements, and this set of processing parameters is determined as the final processing parameters for the hypoid gear. If the inspection results do not meet the preset requirements, the processing parameters can be further corrected and reprocessed according to the above steps.

[0036] In some embodiments, after the machining parameters are corrected and the hyperboloid gear is re-machined, the gear meshing characteristics can be analyzed and verified by tooth surface modeling and meshing simulation to further evaluate the meshing state of the gear under the corrected machining parameters.

[0037] In this embodiment, based on the gear model parameters before machining parameter correction, a quasi-hypoid gear tooth surface modeling tool is used to accurately model and calculate the tooth surfaces of the driving gear and the driven gear, obtaining the tooth surface point coordinate data corresponding to the driving gear and the driven gear. The tooth surface point coordinates are used to characterize the geometric distribution characteristics of the tooth surface in the tooth length direction and tooth height direction, and serve as the basic data for subsequent tooth surface reconstruction and meshing analysis.

[0038] After obtaining the tooth surface coordinates of the driving gear and the driven gear, the tooth surface coordinates are imported into the 3D modeling environment. By connecting and fitting the tooth surface coordinates in the tooth height direction and the tooth width direction, the tooth surface geometry of a single tooth is reconstructed. Subsequently, the tooth surface of the single tooth is arrayed and expanded along the gear axis to form a complete tooth surface structure model.

[0039] In this embodiment, a three-dimensional gear blank model corresponding to the driving gear and the driven gear is constructed based on the gear drawing parameters. The gear blank model is then cut using the tooth surface structure model to retain a gear solid model consistent with the actual gear structure. After cutting, the driving gear and the driven gear are assembled to obtain a gear assembly model for meshing analysis.

[0040] After obtaining the gear assembly model, system-level modeling is performed on the assembly model, and a finite element replacement model is introduced into the system-level model for subsequent meshing analysis under load conditions. In this embodiment, load conditions are applied to the system-level model according to preset load conditions, and the relative misalignment between the driving gear and the driven gear under different load conditions is extracted to characterize the influence of assembly deviations on the gears under actual working conditions.

[0041] Based on this, the gear assembly model is meshed, and a finite element model for meshing analysis is established. Gear material properties and displacement load conditions are set in the finite element model, thus forming a calculation model for meshing process analysis.

[0042] Subsequently, the meshing process of the bevel gear pair was simulated and analyzed under light load conditions. The corresponding gear contact pattern distribution results were extracted, and the simulated contact patterns were compared and analyzed with the actual rolling test contact patterns. When there were differences between the simulated contact patterns and the rolling test contact patterns, the offset distance deviation and axial position deviation of the gears were adjusted, and the meshing process simulation analysis was repeated until the simulated contact patterns and the rolling test contact patterns were basically consistent, thereby determining the gear installation error.

[0043] After determining the installation error, a contact analysis was further performed on the gear meshing process under heavy load conditions. The contact patch distribution and contact stress information of the gear under heavy load conditions were extracted, and the gear strength was checked. When the contact patch distribution and strength check results both meet the preset requirements, it is confirmed that the current machining parameter correction scheme meets the meshing performance requirements, and thus the corresponding machining parameter correction scheme is determined as the final machining scheme.

[0044] In some embodiments, when determining the machining parameter correction amount, a dominant discrimination is made between the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction: Determine the dominant error direction based on the error amplitude distribution; The machining parameters corresponding to the dominant error direction are determined as the main correction parameters, and the machining parameters corresponding to the non-dominant error direction are determined as auxiliary correction parameters.

[0045] In a specific implementation, after performing directional analysis on the tooth surface error, the amplitude distribution of the tooth surface error in the tooth length direction and the tooth height direction is compared to determine which direction's tooth surface error has a more significant impact on tooth surface forming. When the error amplitude along the tooth length direction is generally large or concentrated, the machining parameter more closely related to the tooth surface forming in that direction is determined as the primary correction parameter; when the error amplitude along the tooth height direction is more prominent, the corresponding machining parameter is determined as the primary correction parameter, and the remaining machining parameters are used as auxiliary correction parameters. Through this dominant discrimination method, the machining parameter correction process has a clear focus, avoiding the simultaneous adjustment of multiple types of parameters with equal amplitude.

[0046] In some embodiments, when determining the machining parameter correction amount, the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction are respectively divided into multiple error intervals; The corrected weight combination for the angle and position parameters is determined based on the error intervals of the tooth length and tooth height error characteristics.

[0047] In a specific implementation, based on the tooth surface inspection results, the tooth surface error characteristics along the tooth length direction and along the tooth height direction are divided into multiple error level intervals to reflect different degrees of tooth surface error. When the tooth surface error characteristics fall into different error intervals, different correction weight ratios are assigned to the angle parameters and position parameters, allowing for differentiated allocation of machining parameter correction amounts among different parameters. This method enables the machining parameter correction amounts to be dynamically adjusted according to changes in the degree of tooth surface error, improving the smoothness of the machining parameter correction process.

[0048] In some embodiments, when both angle and position parameters are corrected simultaneously, independent machining parameter correction limits are set for different types of machining parameters, and the upper limit of machining parameter correction corresponding to the main correction parameter is determined based on the tooth surface error characteristics. The tooth surface error characteristics are obtained by statistically analyzing the absolute values ​​of errors at multiple tooth surface sampling points in the tooth length or tooth height direction to obtain the error intensity value. The upper limit of the machining parameter correction is determined by multiplying the error intensity value with the preset correction coefficient. Different correction coefficients are used when the error intensity value is in different error level ranges. When the correction amount of the main correction parameter exceeds the upper limit of the corresponding correction amount of the machining parameter, the proportion of the correction amount of the auxiliary correction parameter is reduced.

[0049] In a specific implementation, when angle and position parameters need to be adjusted simultaneously, to avoid instability in the machining process caused by large-scale simultaneous corrections of multiple parameters, machining parameter correction limits are set for different types of machining parameters. By statistically analyzing the errors of multiple tooth surface sampling points in the tooth length or tooth height direction, an error intensity value reflecting the overall degree of tooth surface error is obtained, and the maximum allowable machining parameter correction amount for the main correction parameter is determined based on the error intensity value. When the error intensity is within different level ranges, different correction coefficients are used to control the rate of change of the machining parameter correction amount; when the machining parameter correction amount of the main correction parameter exceeds the corresponding upper limit, the proportion of the machining parameter correction amount of the auxiliary correction parameter is reduced accordingly to prevent the auxiliary parameter correction from interfering with the main correction direction.

[0050] In some embodiments, the error intensity value is determined statistically by sampling multiple tooth surface points in the tooth length direction or tooth height direction, and the error intensity value E is calculated according to the following formula:

[0051] Where N is the number of sampling points on the tooth surface. For the tooth surface error value corresponding to the i-th tooth surface sampling point, based on the relationship between the error intensity value E and the preset first threshold T1 and second threshold T2, the error level interval is divided into low error interval, medium error interval, and high error interval. Corresponding correction coefficients are selected for each error level interval. , , The upper limit of the correction amount for the main correction parameters of the machining parameters. Determined according to the following formula:

[0052] When the current processing parameter correction amount of the main correction parameter satisfy At the same time, the correction amount of the auxiliary correction parameters for the processing parameters is based on a preset scaling factor. Reduce; in, As a safety margin scaling factor, The auxiliary parameter is the suppression intensity scaling factor. , The preset parameters are determined based on the parameter adjustment capability of the processing equipment, the stability requirements of gear processing, and historical processing experience.

[0053] In a specific implementation, error data from multiple sampling points on the tooth surface are statistically processed to obtain an error intensity value characterizing the overall level of tooth surface error. The error intensity is then divided into different level intervals based on a pre-set threshold. Within each error level interval, different correction coefficients are selected to control the variation of the machining parameter correction amount for the main correction parameter. When the machining parameter correction amount for the main correction parameter gradually approaches the maximum allowable machining parameter correction amount, a safety margin proportional factor and an auxiliary parameter suppression intensity proportional factor are introduced to reduce the machining parameter correction amount for the auxiliary correction parameter. These proportional factors are preset before processing based on equipment adjustability and process stability requirements, ensuring that the machining parameter correction process remains stable and controllable.

[0054] In some embodiments, when dividing the tooth surface error into directional features, the tooth surface is divided into multiple regions, and the tooth surface error distribution corresponding to each region is determined based on the tooth surface detection results. When determining the machining parameter correction amount, the contact spot detection results of the reprocessed gear are obtained, and the machining parameter correction amount is determined for the tooth surface error characteristics of the region corresponding to the contact spot.

[0055] In a specific implementation, based on the tooth surface inspection results, the tooth surface is divided into multiple spatially distinct regions, and the tooth surface error distribution corresponding to each region is obtained. When determining the machining parameter correction amount, the contact spot inspection results of the re-machined gear are obtained, with a focus on the tooth surface error characteristics corresponding to the region where the contact spot is located. Machining parameter correction is prioritized for the tooth surface error in this region, thereby making the parameter adjustment results more consistent with the actual meshing state of the gear.

[0056] In some embodiments, after the tooth surface inspection or contact spot inspection is completed, the current inspection result is compared with the previous round of inspection results. Based on the changes in tooth surface error distribution or contact spot changes, it is determined whether to continue to perform machining parameter correction. When the inspection result meets the preset requirements, the subsequent machining parameter correction operation is terminated.

[0057] In a specific implementation, after each round of reprocessing, the detection results of the current processing state are obtained through tooth surface inspection or contact spot inspection, and compared and analyzed with the detection results after the previous round of processing. When the comparison results show that the tooth surface error distribution tends to be stable or the contact spot state meets the preset requirements, it is determined that there is no need to continue to perform processing parameter correction, thereby terminating the subsequent correction operation; when the detection results still have deviations, the processing parameters are adjusted and reprocessed according to the aforementioned steps until the preset requirements are met.

[0058] Please see Figures 2-7As shown, in one system embodiment of this application, an error correction system for the machining parameters of a quasi-hypoid gear is provided. This system is used to detect and analyze the tooth surface error and reverse the machining parameters after the gear machining is completed, thereby achieving controlled improvement of the tooth surface quality of the quasi-hypoid gear.

[0059] The system includes at least a tooth surface detection unit, an error feature analysis unit, a machining parameter correction determination unit, a parameter adjustment and control unit, and a result evaluation unit. The units interact with each other to form a closed-loop control process.

[0060] In this embodiment, the tooth surface inspection unit is used to inspect the tooth surface of the quasi-hypoid gear after machining in order to obtain the actual geometric shape data of the gear tooth surface and generate the corresponding tooth surface error distribution results.

[0061] Figure 3 The diagram shows the tooth surface error without parameter back-tuning in the embodiment. This error diagram reflects the relatively obvious error distribution characteristics of the quasi-hypoid gear tooth surface in the tooth length and tooth height directions under the initial machining parameters. Based on this detection result, the tooth surface detection unit can compare the actual tooth surface data with the preset target tooth surface data, thereby providing basic data for subsequent error analysis.

[0062] The error feature analysis unit is connected to the tooth surface detection unit and is used to perform directional feature analysis on the acquired tooth surface error distribution. In this embodiment, the error feature analysis unit divides the tooth surface error into directional features based on the distribution pattern of the tooth surface error in the gear tooth surface space, obtaining tooth surface error features along the tooth length direction and tooth surface error features along the tooth height direction. Through this directional division method, the concentrated areas and changing trends of tooth surface error in different spatial directions can be identified, providing a directional basis for adjusting machining parameters.

[0063] The machining parameter correction determination unit determines the machining parameter correction amount corresponding to the tooth surface error characteristics based on the error characteristic analysis results. In this embodiment, the machining parameters include angular parameters characterizing the tool angle state and positional parameters characterizing the relative positional relationship between the tool and the workpiece. The machining parameter correction determination unit assigns different correction amounts to different types of machining parameters according to the distribution of error characteristics in the tooth length and tooth height directions, so that the adjustment direction of the machining parameters matches the spatial distribution characteristics of the tooth surface error.

[0064] The parameter adjustment and control unit receives machining parameter corrections and adjusts the corresponding machining parameters in the machining equipment. After adjustment, the parameter adjustment and control unit controls the machining equipment to perform a remachining operation on the hypoid gear under the updated machining parameter conditions. Through this remachining process, the machining parameters can be adjusted to achieve the desired machining performance. Figure 3The tooth surface error state shown is corrected in reverse. Figure 4 The tooth surface error diagram after parameter re-adjustment in the embodiment is shown. It can be seen that after the system completes one re-adjustment of machining parameters and performs re-machining, the tooth surface error distribution is significantly improved compared with that before the re-adjustment.

[0065] The result evaluation unit is used to evaluate the reworked hypoid gear. In this embodiment, the result evaluation unit can evaluate the error distribution of the reworked tooth surface through tooth surface detection, or evaluate the meshing state of the gear through contact spot detection. Figure 5 The actual contact pattern of the gear after parameter reversal in the embodiment is shown. By observing the distribution and shape of the contact pattern on the tooth surface, the force situation of the gear under actual meshing can be determined.

[0066] In addition, in this embodiment, the system can also combine simulation analysis results to assist in verifying the effect of reverse adjustment of processing parameters. Figure 6 The simulated contact pattern of the gear after parameter adjustment in the embodiment is shown. Figure 7 The simulated contact pattern of the gear after parameter re-adjustment in the embodiment is shown. By comparing the simulated contact pattern results with the actual contact pattern results, the result evaluation unit can further determine whether the machining parameter correction strategy is reasonable, thereby helping to determine whether it is necessary to continue to perform subsequent machining parameter corrections.

[0067] When the result evaluation unit determines that the current tooth surface error distribution or contact patch state meets the preset tooth surface accuracy requirements or meshing requirements, the system determines the current machining parameters as the final machining parameters of the hypoid gear and ends the current gear machining parameter error correction process; when the evaluation result does not meet the preset requirements, the system can continue to trigger the above-mentioned units to work together to further correct and reprocess the machining parameters until the preset requirements are met.

[0068] In some embodiments, this application provides a terminal, including: The memory is used to store error correction programs for the machining parameters of hypoid gears; A processor is used to implement the error correction method for the machining parameters of the quasi-hypoid gear when executing the error correction system for the machining parameters of the quasi-hypoid gear.

[0069] In some embodiments, this application provides a computer-readable storage medium that stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes the error correction method for the quasi-hypoid gear machining parameters.

[0070] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A method for correcting errors in machining parameters of quasi-hypoid gears, characterized in that, Includes the following steps: The tooth surface of the quasi-hypoid gear after processing is inspected to obtain the actual tooth surface data of the quasi-hypoid gear. The actual tooth surface data is compared with the preset target tooth surface data to obtain the tooth surface error distribution of the quasi-hypoid gear. Based on the distribution characteristics of tooth surface error in the gear tooth surface space, the tooth surface error is divided into directional features to obtain the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction. Based on the tooth surface error characteristics in the tooth length direction and the tooth surface error characteristics in the tooth height direction, the machining parameter correction amount corresponding to the tooth surface error characteristics is determined. Among them, the machining parameters include angular parameters used to characterize the tool angular state and positional parameters used to characterize the relative positional relationship between the tool and the workpiece; The machining parameters of the hypoid gear are adjusted according to the machining parameter correction amount, and the hypoid gear is then re-machined under the adjusted machining parameter conditions. The tooth surface of the re-processed hypoid gear is inspected or the meshing state is evaluated. When the inspection results meet the preset tooth surface accuracy or meshing requirements, the corresponding processing parameters are determined as the final processing parameters of the hypoid gear.

2. The error correction method for quasi-hypoid gear machining parameters according to claim 1, characterized in that, When determining the correction amount for machining parameters, a dominant distinction is made between the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction: Determine the dominant error direction based on the error amplitude distribution; The machining parameters corresponding to the dominant error direction are determined as the main correction parameters, and the machining parameters corresponding to the non-dominant error direction are determined as auxiliary correction parameters.

3. The error correction method for quasi-hypoid gear machining parameters according to claim 2, characterized in that, When determining the correction amount of machining parameters, the tooth surface error characteristics along the tooth length direction and the tooth surface error characteristics along the tooth height direction are divided into multiple error intervals respectively. The corrected weight combination for the angle and position parameters is determined based on the error intervals of the tooth length and tooth height error characteristics.

4. The error correction method for quasi-hypoid gear machining parameters according to claim 3, characterized in that, When correcting both angle and position parameters simultaneously, separate correction limits are set for different types of machining parameters, and the upper limit of the machining parameter correction amount corresponding to the main correction parameter is determined based on the tooth surface error characteristics. The tooth surface error feature is the error intensity value obtained by statistically analyzing the absolute values ​​of errors at multiple tooth surface sampling points in the tooth length or tooth height direction. The upper limit of the machining parameter correction is determined by multiplying the error intensity value with the preset correction coefficient. Different correction coefficients are used when the error intensity value is in different error level ranges. When the correction amount of the main correction parameter exceeds the upper limit of the corresponding correction amount of the machining parameter, the proportion of the correction amount of the auxiliary correction parameter is reduced.

5. The error correction method for quasi-hypoid gear machining parameters according to claim 4, characterized in that, The error intensity value is determined by statistically analyzing the errors of multiple tooth surface sampling points along the tooth length or tooth height direction. The error intensity value E is calculated according to the following formula: Where N is the number of sampling points on the tooth surface. For the tooth surface error value corresponding to the i-th tooth surface sampling point, based on the relationship between the error intensity value E and the preset first threshold T1 and second threshold T2, the error level interval is divided into low error interval, medium error interval, and high error interval. Corresponding correction coefficients are selected for each error level interval. , , The upper limit of the correction amount for the main correction parameters of the machining parameters. Determined according to the following formula: When the current processing parameter correction amount of the main correction parameter satisfy At the same time, the correction amount of the auxiliary correction parameters for the processing parameters is based on a preset scaling factor. Reduce; in, As a safety margin scaling factor, The auxiliary parameter is the suppression intensity scaling factor. , The preset parameters are determined based on the parameter adjustment capability of the processing equipment, the stability requirements of gear processing, and historical processing experience.

6. The error correction method for quasi-hypoid gear machining parameters according to claim 1, characterized in that, When classifying the directional features of tooth surface errors, the tooth surface is divided into multiple regions. Based on the tooth surface inspection results, the tooth surface error distribution corresponding to each region is determined. When determining the machining parameter correction amount, the contact spot inspection results of the re-processed gear are obtained, and the machining parameter correction amount is determined for the tooth surface error characteristics of the region corresponding to the contact spot.

7. The error correction method for quasi-hypoid gear machining parameters according to claim 6, characterized in that, After completing the reprocessed tooth surface inspection or contact spot inspection, the current inspection result is compared with the previous round of inspection results. Based on the changes in tooth surface error distribution or contact spot changes, it is determined whether to continue to perform processing parameter correction. When the inspection result meets the preset requirements, the subsequent processing parameter correction operation is terminated.

8. An error correction system for machining parameters of quasi-hypoid gears, used to implement the error correction method for machining parameters of quasi-hypoid gears as described in claim 1, characterized in that, The system includes: The tooth surface inspection unit is used to inspect the tooth surface of the processed hypoid gear, obtain the actual tooth surface data of the hypoid gear, and compare it with the preset target tooth surface data to obtain the tooth surface error distribution of the hypoid gear. The error feature analysis unit is used to divide the tooth surface error into directional features based on the distribution characteristics of the tooth surface error in the gear tooth surface space, and obtain the tooth surface error features along the tooth length direction and the tooth surface error features along the tooth height direction. The machining parameter correction determination unit is used to determine the machining parameter correction amount corresponding to the tooth surface error characteristics based on the tooth surface error characteristics in the tooth length direction and the tooth surface error characteristics in the tooth height direction. The machining parameters include angular parameters used to characterize the tool angle state and positional parameters used to characterize the relative positional relationship between the tool and the workpiece. The parameter adjustment and control unit is used to adjust the machining parameters of the hypoid gear according to the machining parameter correction amount, and control the hypoid gear to perform remachining operation under the adjusted machining parameter conditions; The result evaluation unit is used to perform tooth surface inspection or meshing state evaluation on the reprocessed hypoid gear. Based on the inspection results, it determines whether the preset tooth surface accuracy requirements or meshing requirements are met, and if the preset requirements are met, it determines the corresponding processing parameters as the final processing parameters of the hypoid gear.

9. A terminal, characterized in that, include: The memory is used to store error correction programs for the machining parameters of hypoid gears; The processor is configured to implement the steps of the error correction method for quasi-hypoid gear machining parameters as described in claim 1 when executing the error correction device for the quasi-hypoid gear machining parameters.

10. A computer-readable storage medium, characterized in that, The storage medium stores computer instructions. When the computer reads the computer instructions from the storage medium, the computer executes the error correction method for the quasi-hypoid gear machining parameters as described in claim 1.

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