CN117067668B - Matching precision control method and system for motor stator and rotor stamping die - Google Patents
Matching precision control method and system for motor stator and rotor stamping die Download PDFInfo
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- 238000004080 punching Methods 0.000 claims abstract description 112
- 238000005457 optimization Methods 0.000 claims abstract description 29
- 238000013461 design Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 14
- 238000004088 simulation Methods 0.000 claims description 9
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/26—Programme control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention discloses a method and a system for controlling the matching precision of a motor stator and rotor stamping die, and relates to the technical field of intelligent control, wherein the method comprises the following steps: punching the stator wafer and the rotor wafer according to design parameters by a primary punching station; extracting stator shaft hole coordinate information through a stator optimization stamping station, constructing stator constraint conditions and stator objective functions, and obtaining optimal stator stamping die control parameters to obtain stator stamping sheets; and extracting the coordinate information of the rotor shaft hole and the central coordinate information of M stator slots through a rotor optimization stamping station, constructing rotor constraint conditions and rotor objective functions, and optimizing rotor stamping die control parameters to obtain rotor stamping sheets. The invention solves the technical problem of poor stator and rotor stamping quality caused by low matching precision of the motor stator and rotor stamping die in the prior art, and achieves the technical effect of improving stator and rotor stamping quality by improving the matching precision of the stamping die.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a method and a system for controlling the matching precision of a motor stator and rotor stamping die.
Background
The current motor iron core punching stamping process adopted in the motor industry is characterized in that stator sheet punching grooves are positioned by means of the inner circle of a stator sheet, and a certain gap exists, so that the problems of coaxiality deviation, irregular outer circle of an iron core after lamination and the like are caused, winding embedding grooves are excessively high in filling rate, windings are easy to damage, and in addition, due to the fact that the coaxiality deviation of the inner circle and the outer circle of the stator iron core is large, a reasonable air gap cannot be ensured, and the motor assembly quality is affected.
Disclosure of Invention
The application provides a matching precision control method and a matching precision control system for a motor stator and rotor stamping die, which are used for solving the technical problem of poor stator and rotor stamping quality caused by low matching precision of the motor stator and rotor stamping die in the prior art.
In a first aspect of the present application, a method for controlling matching accuracy of a stamping die for a stator and a rotor of a motor is provided, the method comprising: punching a stator wafer and a rotor wafer according to design parameters of the stator wafer and the rotor wafer by a primary punching station, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole; acquiring images of the stator wafer and the rotor wafer through a stator optimization stamping station, extracting coordinate information of a stator shaft hole, and constructing stator constraint conditions and stator objective functions for optimizing control parameters of a stamping die for stamping stator slots, wherein the stator objective functions comprise calculation fitness according to the distances between M stator slots and the stator shaft hole, and M is an integer larger than 1; according to the stator shaft hole coordinate information, adopting stator constraint conditions and a stator objective function to optimize stator stamping die control parameters, obtaining optimal stator stamping die control parameters, controlling a stator stamping die, stamping a stator wafer, and obtaining a stator punching sheet; collecting stator punching images through a rotor optimization stamping station, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping; according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots, adopting rotor constraint conditions and a rotor objective function to optimize rotor stamping die control parameters so as to obtain optimal rotor stamping die control parameters; and controlling the rotor stamping die by adopting optimal rotor stamping die parameters, and stamping the rotor wafer to obtain the rotor stamping sheet.
In a second aspect of the present application, there is provided a mating accuracy control system of a motor stator and rotor stamping die, the system comprising: the primary stamping module is used for stamping the stator wafer and the rotor wafer through a primary stamping station according to design parameters of the stator wafer and the rotor wafer, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole; the stator objective function construction module is used for optimizing a stamping station through a stator, collecting images of the stator wafer and the rotor wafer, extracting coordinate information of a stator shaft hole, constructing stator constraint conditions and stator objective functions for optimizing control parameters of a stamping die for stamping stator slots, and calculating fitness according to the distances between M stator slots and the stator shaft hole, wherein M is an integer larger than 1; the stator punching sheet obtaining module is used for optimizing stator punching die control parameters according to the stator shaft hole coordinate information and adopting stator constraint conditions and stator objective functions to obtain optimal stator punching die control parameters, controlling a stator punching die and punching a stator wafer to obtain a stator punching sheet; the rotor objective function construction module is used for optimizing a stamping station through a rotor, collecting stator punching images, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping; the die control parameter obtaining module is used for optimizing the rotor stamping die control parameters by adopting rotor constraint conditions and rotor objective functions according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots to obtain optimal rotor stamping die control parameters; the rotor punching sheet obtaining module is used for controlling the rotor punching die by adopting optimal rotor punching die parameters and punching the rotor wafer to obtain the rotor punching sheet.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
the application provides a matching precision control method of a motor stator and rotor stamping die, which relates to the technical field of intelligent control, and a stator wafer and a rotor wafer are stamped through a primary stamping station; extracting stator shaft hole coordinate information through a stator optimization stamping station, constructing stator constraint conditions and a stator objective function, screening out optimal stator stamping die control parameters, and obtaining stator stamping sheets; through rotor optimization stamping station, construction rotor constraint conditions and rotor objective functions are adopted, rotor stamping die control parameters are optimized, rotor stamping sheets are obtained according to the optimized rotor stamping die control parameters, the technical problem that in the prior art, stator and rotor stamping quality is poor due to low matching precision of a motor stator and rotor stamping die is solved, shaft hole positioning is achieved, motor stator and rotor stamping die control parameter optimization is carried out, matching precision of the stamping die is improved, and then the technical effect of stator and rotor stamping quality is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for controlling the matching accuracy of a motor stator and rotor stamping die according to an embodiment of the present application;
fig. 2 is a schematic flow chart of obtaining control parameters of an optimal stator stamping die in a method for controlling matching accuracy of a motor stator and rotor stamping die according to an embodiment of the present application;
fig. 3 is a schematic flow chart of constructing a rotor objective function in a method for controlling the matching accuracy of a motor stator and rotor stamping die according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a matching accuracy control system of a motor stator and rotor stamping die according to an embodiment of the present application.
Reference numerals illustrate: the device comprises a primary stamping module 11, a stator objective function construction module 12, a stator punching sheet obtaining module 13, a rotor objective function construction module 14, a die control parameter obtaining module 15 and a rotor punching sheet obtaining module 16.
Detailed Description
The application provides a matching precision control method of a motor stator and rotor stamping die, which is used for solving the technical problem of poor stator and rotor stamping quality caused by low matching precision of the motor stator and rotor stamping die in the prior art.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
As shown in fig. 1, the present application provides a method for controlling the matching precision of a stamping die for a stator and a rotor of a motor, where the method includes:
p10: punching a stator wafer and a rotor wafer according to design parameters of the stator wafer and the rotor wafer by a primary punching station, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole;
optionally, the primary stamping station is a station for performing preliminary rough machining on the stator and the rotor of the motor, the primary stamping station is used for stamping the preliminary stator disc and the rotor disc according to design parameters of the stator disc and the rotor disc, the design parameters are standard structural dimension parameters of the stator and the rotor to be machined, the standard structural dimension parameters comprise thickness, stator slot number, rotor slot number, outer circle dimension, inner circle dimension and the like, a stator shaft hole is formed in the stator disc, and a rotor shaft hole is formed in the rotor disc and used for being connected with a stator core.
P20: acquiring images of the stator wafer and the rotor wafer through a stator optimization stamping station, extracting coordinate information of a stator shaft hole, and constructing stator constraint conditions and stator objective functions for optimizing control parameters of a stamping die for stamping stator slots, wherein the stator objective functions comprise calculation fitness according to the distances between M stator slots and the stator shaft hole, and M is an integer larger than 1;
specifically, the stator optimizing stamping station is a station for optimizing control parameters of a stator stamping die, an image acquisition device is used for acquiring images of the stator wafer and the rotor wafer at present through the stator optimizing stamping station, and coordinate information of a stator shaft hole is obtained through image identification and extraction, namely, the shaft hole in the center of the stator wafer is based on the position coordinate of the whole stator wafer, and the position deviation of the stator shaft hole can be reflected. Further, according to the position relation between the stator slots and the stator shaft hole, constructing a stator constraint condition and a stator objective function for optimizing control parameters of a stamping die for stamping the stator slots, wherein the stator objective function is an adaptability function for carrying out distance between the stator slots and the stator shaft hole, and can be used for determining the optimal distance between the stator slots and the stator shaft hole, and the method comprises the steps of calculating the adaptability according to the distances between M stator slots and the stator shaft hole, wherein M is an integer greater than 1.
Further, step P20 in the embodiment of the present application further includes:
p21: acquiring a sample stator wafer image set according to stamping data records in the primary stamping station;
p22: identifying and marking the center coordinates of the stator shaft hole in each sample stator wafer image to obtain a sample stator shaft hole coordinate information set;
p23: based on a depth convolution network, a sample stator wafer image set and a sample stator shaft hole coordinate information set are used as training data, and a convergent stator wafer identifier is constructed and trained;
p24: and identifying the stator wafer image by adopting a stator wafer identifier to obtain the stator shaft hole coordinate information.
By means of example, through extracting stamping data records in a stamping station, images of a plurality of stator discs stamped in the past are collected to form a sample stator disc image set, center coordinates of stator shaft holes in each sample stator disc image are respectively identified and marked to obtain a sample stator shaft hole coordinate information set, further, based on a deep convolution network architecture, the sample stator disc image set and the sample stator shaft hole coordinate information set are adopted as training data, a stator disc identifier is constructed, training, verification and testing are conducted through the training data until output of the stator disc identifier achieves convergence and meets preset accuracy, and the stator disc identifier is obtained. Further, the current stator wafer image is input into the stator wafer identifier, the stator wafer identifier is adopted to identify and match the current stator wafer image, and the stator shaft hole coordinate information of the current stator wafer is output and can be used for calculating the stator shaft hole deviation.
Further, step P20 in the embodiment of the present application further includes:
p25: taking the maximum difference value of the distances between the bottoms of the M stator slots and the stator shaft hole coordinate information not larger than a stator difference value threshold value as a stator constraint condition;
p26: constructing a stator objective function, wherein the following formula is as follows:
;
wherein,for the adaptation of the stator>The distance between the bottom of the ith stator slot and the coordinate information of the stator shaft hole is the distance.
It should be understood that, according to the production precision requirement of the stator to be punched, a stator difference threshold is preset, namely, a distance threshold of the stator slot bottom and the stator shaft hole coordinate information, and the maximum difference of the distances between the M stator slot bottom and the stator shaft hole coordinate information is not greater than the stator difference threshold, which is used as a stator constraint condition, namely, as a distance optimizing space of a stator objective function, to construct a stator objective function:wherein, the method comprises the steps of,/>for the adaptation of the stator, the higher the adaptation, the better the corresponding distance value, the +.>The distance between the bottom of the ith stator slot and the coordinate information of the stator shaft hole can be used for determining the optimal distance between the stator slot and the stator shaft hole.
P30: according to the stator shaft hole coordinate information, adopting stator constraint conditions and a stator objective function to optimize stator stamping die control parameters, obtaining optimal stator stamping die control parameters, controlling a stator stamping die, stamping a stator wafer, and obtaining a stator punching sheet;
further, as shown in fig. 2, step P30 in the embodiment of the present application further includes:
p31: according to the stamping data record of the stator slots, obtaining control parameter records of a sample stator stamping die and M sample stator slot bottom coordinate information sets;
p32: constructing a stator slot punching twin model based on the control parameter records of the sample stator punching die and M sample stator slot bottom coordinate information sets;
p33: acquiring a stator control parameter range of a stator slot stamping die control parameter, randomly generating a plurality of stator initial solutions in the stator control parameter range, and constructing a stator slot stamping database when the stator initial solutions meet stator constraint conditions;
p34: repeating the optimization in the stator slot punching database, and updating the stator slot punching database;
p35: and outputting the stator stamping die control parameters with the maximum stator fitness after the repetition times reach the preset repetition times, and obtaining the optimal stator stamping die control parameters.
Specifically, from the previous stator slot punching data records, a plurality of sample stator punching die control parameter records and corresponding M sample stator slot bottom coordinate information sets are extracted, the sample stator punching die control parameter records and the M sample stator slot bottom coordinate information sets are adopted as construction data, and a stator slot punching twin model is constructed, wherein the stator slot punching twin model is a virtual model which presents a physical object in a virtual space in a digital mode, namely, is created for a stator slot in a digital mode.
Further, a stator control parameter range of stator slot stamping die control parameters is obtained, a plurality of stator initial solutions, namely a plurality of initial stator stamping die control parameters, are randomly generated in the stator control parameter range, a plurality of initial stator stamping die control parameters meeting stator constraint conditions are screened out, a stator slot stamping database is constructed, further, stator stamping data optimization is carried out in the stator slot stamping database based on the stator slot stamping database and combined with a stator objective function, the stator slot stamping database is updated according to the adaptive range of an optimizing result, and after the number of repeated optimization reaches the preset number of times, the stator stamping die control parameters with the largest stator adaptation degree are output to serve as optimal stator stamping die control parameters.
Further, the control parameters of the optimal stator stamping die are used for controlling the stator stamping die to conduct secondary stamping on the preliminarily stamped stator wafer, and the stator stamping piece with high accuracy is obtained.
Further, step P34 of the embodiment of the present application further includes:
p34-1: randomly selecting and acquiring a stator stamping die control parameter in a stator slot stamping database to serve as a first solution and serve as an optimal solution;
p34-1: adopting a stator groove punching twin model to perform punching twin simulation on the first solution to obtain M pieces of first stator groove base coordinate information, and combining the stator objective function to calculate and obtain first stator fitness;
p34-2: randomly selecting again to obtain a second solution, and obtaining a second stator fitness through simulation calculation;
p34-3: judging the magnitude relation between the second stator fitness and the first stator fitness, and updating the optimal solution;
p34-4: continuously optimizing in the stator slot punching database, taking Q solutions with the lowest stator fitness in the optimization process as solutions to be updated when the preset optimization times are reached, randomly adjusting and updating the Q solutions by adopting an updating step length in the stator control parameter range, and updating the stator slot punching database;
p34-5: and (5) continuing to optimize the control parameters of the stator stamping die in the updated stator slot stamping database.
And randomly selecting a stator stamping die control parameter in a stator slot stamping database as a first solution, and taking the first solution as an optimal solution, namely a temporary optimal stator stamping die control parameter, then adopting a stator slot stamping twin model, performing stamping twin simulation by using the first solution, namely performing stamping simulation by using the temporary optimal stator stamping die control parameter, extracting M pieces of first stator slot base coordinate information of a stator wafer obtained by simulated stamping, and performing fitness calculation by combining the stator objective function to obtain first stator fitness. And similarly, randomly selecting a second solution in the stator slot punching database again, obtaining the second stator fitness through simulation calculation, judging the size relation between the second stator fitness and the first stator fitness, selecting a solution with large fitness as an optimal solution, and updating the optimal solution.
Further, the stamping data optimization is continuously carried out in the stator slot stamping database, when the preset optimization times are reached, Q solutions with the lowest stator fitness in the optimization process are extracted to be used as solutions to be updated, and in the stator control parameter range, the Q solutions are randomly adjusted and updated by adopting the updating step length, wherein the updating step length is the parameter adjusting step length of the appointed sub control parameter, the updating of the stator slot stamping database is completed through the updating of the Q solutions, and then the optimization of the stator stamping die control parameter is continuously carried out in the updated stator slot stamping database, so that the optimizing quality of the stamping data is improved.
P40: collecting stator punching images through a rotor optimization stamping station, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping;
further, as shown in fig. 3, step P40 in the embodiment of the present application further includes:
p41: identifying a rotor wafer image to obtain rotor shaft hole coordinate information, and identifying stator punching images to obtain stator slot center coordinate information of M stator slots;
p42: the maximum difference value of the distances between the bottoms of the N rotor grooves and the coordinate information of the rotor shaft holes is not larger than a rotor difference value threshold value, the distance between the central coordinate information of the N rotor grooves and the central coordinate information of the stator groove is not larger than a stator-rotor difference value threshold value, and N is an integer larger than 1 and smaller than M as a rotor constraint condition;
p43: constructing a rotor objective function, wherein the formula is as follows:
;
wherein,for rotor fitness->And->Is weight(s)>For the distance between the bottom of the jth rotor slot and the rotor shaft hole coordinate information, +.>The distance is the center coordinate information of the stator slot and the center coordinate information of the N rotor slots.
In a feasible embodiment of the application, through the rotor optimization stamping station, the stator punching sheet image after secondary stamping is collected by using the reminding collection device, the rotor wafer image after primary stamping is combined for image identification, the rotor wafer image is respectively identified, the rotor shaft hole coordinate information is obtained, the stator punching sheet image is identified, and the stator slot center coordinate information of M stator slots is obtained.
Further, a rotor difference threshold and a stator-rotor difference threshold are set according to the precision requirement, and the maximum difference of distances between the bottoms of N rotor grooves and the coordinate information of the rotor shaft hole is not larger than the rotor difference threshold, the distances between the central coordinate information of N rotor grooves and the central coordinate information of the stator groove are not larger than the stator-rotor difference threshold, and N is an integer larger than 1 and smaller than M as a rotor constraint condition. Further, the rotor constraint condition is used as a value range of a rotor objective function, and the rotor objective function is constructed:the method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>For the rotor fitness, the greater the fitness, the better the corresponding distance parameter, the +.>And->Is weight(s)>Is the distance between the bottom of the jth rotor groove and the coordinate information of the rotor shaft hole,the distance is the center coordinate information of the stator slot and the center coordinate information of the N rotor slots.
P50: according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots, adopting rotor constraint conditions and a rotor objective function to optimize rotor stamping die control parameters so as to obtain optimal rotor stamping die control parameters;
specifically, according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots, the rotor objective function is used for optimizing rotor stamping die control parameters in the rotor constraint condition range, and rotor stamping die control parameters corresponding to the solution with the maximum rotor fitness are screened out to serve as optimal rotor stamping die control parameters.
Further, step P50 of the embodiment of the present application further includes:
p51: according to the stamping data record of the rotor groove, a control parameter record of a sample rotor stamping die and N sample rotor groove bottom coordinate information sets are obtained;
p52: constructing a rotor slot punching twin model based on the control parameter records of the sample rotor punching die and N sample rotor slot bottom coordinate information sets;
p53: acquiring a rotor control parameter range of rotor slot stamping die control parameters, randomly generating a plurality of rotor initial solutions in the rotor control parameter range, and constructing a rotor slot stamping database when the rotor initial solutions meet rotor constraint conditions;
p54: repeatedly optimizing in the rotor slot punching database, and updating the rotor slot punching database;
p55: and outputting the rotor stamping die control parameter with the maximum rotor fitness after the repetition number reaches the preset repetition number, and obtaining the optimal rotor stamping die control parameter.
Optionally, a plurality of sample rotor stamping die control parameter records and N sample rotor groove bottom coordinate information sets are extracted from the stamping data records of the rotor groove, and the rotor groove stamping twin model, that is, the rotor groove stamping virtual model, is constructed by using the plurality of sample rotor stamping die control parameter records and the N sample rotor groove bottom coordinate information sets as construction data. Further, a rotor control parameter range of rotor slot stamping die control parameters is obtained, a plurality of rotor initial solutions are randomly generated in the rotor control parameter range, solutions meeting rotor constraint conditions are screened out, and a rotor slot stamping database is constructed.
Based on the rotor slot punching database, randomly extracting rotor punching die control parameters, combining a rotor objective function, calculating rotor fitness, screening out parameters with larger fitness, repeatedly optimizing in the rotor slot punching database for multiple times, updating the rotor slot punching database according to the parameters with smaller fitness, continuously optimizing by using the updated rotor slot punching database until the repetition number reaches the preset repetition number, stopping optimizing, and outputting the rotor punching die control parameters with the maximum current rotor fitness to obtain the optimal rotor punching die control parameters.
P60: and controlling the rotor stamping die by adopting optimal rotor stamping die parameters, and stamping the rotor wafer to obtain the rotor stamping sheet.
By way of example, the rotor stamping die is controlled to conduct secondary stamping on the primarily stamped rotor wafer by adopting the optimal rotor stamping die parameters, and the rotor stamping sheet with higher fineness is obtained.
In summary, the embodiments of the present application have at least the following technical effects:
the method comprises the steps that a stator wafer and a rotor wafer are punched through a primary punching station; extracting stator shaft hole coordinate information through a stator optimization stamping station, constructing stator constraint conditions and a stator objective function, screening out optimal stator stamping die control parameters, and obtaining stator stamping sheets; and constructing rotor constraint conditions and a rotor objective function through a rotor optimization stamping station, optimizing rotor stamping die control parameters, and obtaining rotor punching sheets according to the optimized rotor stamping die control parameters.
The control parameters of the motor stator and rotor stamping die are optimized through shaft hole positioning, so that the matching precision of the stamping die is improved, and the technical effect of stator and rotor stamping quality is improved.
Example two
Based on the same inventive concept as the method for controlling the matching precision of the motor stator and rotor stamping die in the foregoing embodiment, as shown in fig. 4, the present application provides a system for controlling the matching precision of the motor stator and rotor stamping die, and the system and method embodiments in the embodiments of the present application are based on the same inventive concept. Wherein the system comprises:
the primary stamping module 11 is used for stamping the stator wafer and the rotor wafer according to design parameters of the stator wafer and the rotor wafer through a primary stamping station, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole;
the stator objective function construction module 12 is configured to optimize a stamping station through a stator, collect images of the stator disc and the rotor disc, extract coordinate information of a stator shaft hole, and construct stator constraint conditions and a stator objective function for optimizing control parameters of a stamping die for stamping stator slots, where the stator objective function includes calculating fitness according to distances between M stator slots and the stator shaft hole, and M is an integer greater than 1;
the stator punching sheet obtaining module 13 is used for optimizing control parameters of a stator punching die by adopting stator constraint conditions and a stator objective function according to the stator shaft hole coordinate information to obtain optimal control parameters of the stator punching die, controlling the stator punching die and punching a stator wafer to obtain the stator punching sheet;
the rotor objective function construction module 14 is used for optimizing a stamping station through a rotor, collecting stator punching images, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping;
the die control parameter obtaining module 15 is used for optimizing the rotor stamping die control parameters by adopting rotor constraint conditions and a rotor objective function according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots to obtain optimal rotor stamping die control parameters;
the rotor punching sheet obtaining module 16 is used for controlling a rotor punching die by adopting optimal rotor punching die parameters, punching a rotor wafer and obtaining a rotor punching sheet.
Further, the stator objective function construction module 12 is further configured to perform the following steps:
acquiring a sample stator wafer image set according to stamping data records in the primary stamping station;
identifying and marking the center coordinates of the stator shaft hole in each sample stator wafer image to obtain a sample stator shaft hole coordinate information set;
based on a depth convolution network, a sample stator wafer image set and a sample stator shaft hole coordinate information set are used as training data, and a convergent stator wafer identifier is constructed and trained;
and identifying the stator wafer image by adopting a stator wafer identifier to obtain the stator shaft hole coordinate information.
Further, the stator objective function construction module 12 is further configured to perform the following steps:
taking the maximum difference value of the distances between the bottoms of the M stator slots and the stator shaft hole coordinate information not larger than a stator difference value threshold value as a stator constraint condition;
constructing a stator objective function, wherein the following formula is as follows:
;
wherein,for the adaptation of the stator>The distance between the bottom of the ith stator slot and the coordinate information of the stator shaft hole is the distance.
Further, the stator punching obtaining module 13 is further configured to perform the following steps:
according to the stamping data record of the stator slots, obtaining control parameter records of a sample stator stamping die and M sample stator slot bottom coordinate information sets;
constructing a stator slot punching twin model based on the control parameter records of the sample stator punching die and M sample stator slot bottom coordinate information sets;
acquiring a stator control parameter range of a stator slot stamping die control parameter, randomly generating a plurality of stator initial solutions in the stator control parameter range, and constructing a stator slot stamping database when the stator initial solutions meet stator constraint conditions;
repeating the optimization in the stator slot punching database, and updating the stator slot punching database;
and outputting the stator stamping die control parameters with the maximum stator fitness after the repetition times reach the preset repetition times, and obtaining the optimal stator stamping die control parameters.
Further, the stator punching obtaining module 13 is further configured to perform the following steps:
randomly selecting and acquiring a stator stamping die control parameter in a stator slot stamping database to serve as a first solution and serve as an optimal solution;
adopting a stator groove punching twin model to perform punching twin simulation on the first solution to obtain M pieces of first stator groove base coordinate information, and combining the stator objective function to calculate and obtain first stator fitness;
randomly selecting again to obtain a second solution, and obtaining a second stator fitness through simulation calculation;
judging the magnitude relation between the second stator fitness and the first stator fitness, and updating the optimal solution;
continuously optimizing in the stator slot punching database, taking Q solutions with the lowest stator fitness in the optimization process as solutions to be updated when the preset optimization times are reached, randomly adjusting and updating the Q solutions by adopting an updating step length in the stator control parameter range, and updating the stator slot punching database;
and (5) continuing to optimize the control parameters of the stator stamping die in the updated stator slot stamping database.
Further, the rotor objective function construction module 14 is further configured to perform the following steps:
identifying a rotor wafer image to obtain rotor shaft hole coordinate information, and identifying stator punching images to obtain stator slot center coordinate information of M stator slots;
the maximum difference value of the distances between the bottoms of the N rotor grooves and the coordinate information of the rotor shaft holes is not larger than a rotor difference value threshold value, the distance between the central coordinate information of the N rotor grooves and the central coordinate information of the stator groove is not larger than a stator-rotor difference value threshold value, and N is an integer larger than 1 and smaller than M as a rotor constraint condition;
constructing a rotor objective function, wherein the formula is as follows:
;
wherein,for rotor fitness->And->Is weight(s)>For the distance between the bottom of the jth rotor slot and the rotor shaft hole coordinate information, +.>The distance is the center coordinate information of the stator slot and the center coordinate information of the N rotor slots.
Further, the mold control parameter obtaining module 15 is further configured to perform the following steps:
according to the stamping data record of the rotor groove, a control parameter record of a sample rotor stamping die and N sample rotor groove bottom coordinate information sets are obtained;
constructing a rotor slot punching twin model based on the control parameter records of the sample rotor punching die and N sample rotor slot bottom coordinate information sets;
acquiring a rotor control parameter range of rotor slot stamping die control parameters, randomly generating a plurality of rotor initial solutions in the rotor control parameter range, and constructing a rotor slot stamping database when the rotor initial solutions meet rotor constraint conditions;
repeatedly optimizing in the rotor slot punching database, and updating the rotor slot punching database;
and outputting the rotor stamping die control parameter with the maximum rotor fitness after the repetition number reaches the preset repetition number, and obtaining the optimal rotor stamping die control parameter.
It should be noted that the sequence of the embodiments of the present application is merely for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing description has been directed to specific embodiments of this specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The foregoing description of the preferred embodiments of the present application is not intended to limit the invention to the particular embodiments of the present application, but to limit the scope of the invention to the particular embodiments of the present application.
The specification and drawings are merely exemplary of the application and are to be regarded as covering any and all modifications, variations, combinations, or equivalents that are within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the present application and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (4)
1. The method is applied to matching precision control equipment of a motor stator and rotor stamping die, and the equipment comprises a primary stamping station, a stator optimizing stamping station and a rotor optimizing stamping station, and the method comprises the following steps:
punching a stator wafer and a rotor wafer according to design parameters of the stator wafer and the rotor wafer by a primary punching station, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole;
acquiring images of the stator wafer and the rotor wafer through a stator optimization stamping station, extracting coordinate information of a stator shaft hole, and constructing stator constraint conditions and stator objective functions for optimizing control parameters of a stamping die for stamping stator slots, wherein the stator objective functions comprise calculation fitness according to the distances between M stator slots and the stator shaft hole, and M is an integer larger than 1;
according to the stator shaft hole coordinate information, adopting stator constraint conditions and a stator objective function to optimize stator stamping die control parameters, obtaining optimal stator stamping die control parameters, controlling a stator stamping die, stamping a stator wafer, and obtaining a stator punching sheet;
collecting stator punching images through a rotor optimization stamping station, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping;
according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots, adopting rotor constraint conditions and a rotor objective function to optimize rotor stamping die control parameters so as to obtain optimal rotor stamping die control parameters;
controlling a rotor stamping die by adopting optimal rotor stamping die parameters, and stamping a rotor wafer to obtain a rotor stamping sheet;
the method comprises the following steps:
taking the maximum difference value of the distances between the bottoms of the M stator slots and the stator shaft hole coordinate information not larger than a stator difference value threshold value as a stator constraint condition;
constructing a stator objective function, wherein the following formula is as follows:
;
wherein,for the adaptation of the stator>The distance between the bottom of the ith stator slot and the coordinate information of the stator shaft hole is the distance;
the method comprises the following steps:
according to the stamping data record of the stator slots, obtaining control parameter records of a sample stator stamping die and M sample stator slot bottom coordinate information sets;
constructing a stator slot punching twin model based on the control parameter records of the sample stator punching die and M sample stator slot bottom coordinate information sets;
acquiring a stator control parameter range of a stator slot stamping die control parameter, randomly generating a plurality of stator initial solutions in the stator control parameter range, and constructing a stator slot stamping database when the stator initial solutions meet stator constraint conditions;
repeating the optimization in the stator slot punching database, and updating the stator slot punching database;
after the repetition number reaches the preset repetition number, outputting the stator stamping die control parameter with the largest stator fitness to obtain the optimal stator stamping die control parameter;
the method comprises the following steps:
randomly selecting and acquiring a stator stamping die control parameter in a stator slot stamping database to serve as a first solution and serve as an optimal solution;
adopting a stator groove punching twin model to perform punching twin simulation on the first solution to obtain M pieces of first stator groove base coordinate information, and combining the stator objective function to calculate and obtain first stator fitness;
randomly selecting again to obtain a second solution, and obtaining a second stator fitness through simulation calculation;
judging the magnitude relation between the second stator fitness and the first stator fitness, and updating the optimal solution;
continuously optimizing in the stator slot punching database, taking Q solutions with the lowest stator fitness in the optimization process as solutions to be updated when the preset optimization times are reached, randomly adjusting and updating the Q solutions by adopting an updating step length in the stator control parameter range, and updating the stator slot punching database;
in the updated stator slot stamping database, continuing to optimize the control parameters of the stator stamping die;
the method comprises the following steps:
identifying a rotor wafer image to obtain rotor shaft hole coordinate information, and identifying stator punching images to obtain stator slot center coordinate information of M stator slots;
the maximum difference value of the distances between the bottoms of the N rotor grooves and the coordinate information of the rotor shaft holes is not larger than a rotor difference value threshold value, the distance between the central coordinate information of the N rotor grooves and the central coordinate information of the stator groove is not larger than a stator-rotor difference value threshold value, and N is an integer larger than 1 and smaller than M as a rotor constraint condition;
constructing a rotor objective function, wherein the formula is as follows:
;
wherein,for rotor fitness->And->Is weight(s)>For the distance between the bottom of the jth rotor slot and the rotor shaft hole coordinate information, +.>The distance is the center coordinate information of the stator slot and the center coordinate information of the N rotor slots.
2. The method according to claim 1, characterized in that the method comprises:
acquiring a sample stator wafer image set according to stamping data records in the primary stamping station;
identifying and marking the center coordinates of the stator shaft hole in each sample stator wafer image to obtain a sample stator shaft hole coordinate information set;
based on a depth convolution network, a sample stator wafer image set and a sample stator shaft hole coordinate information set are used as training data, and a convergent stator wafer identifier is constructed and trained;
and identifying the stator wafer image by adopting a stator wafer identifier to obtain the stator shaft hole coordinate information.
3. The method according to claim 1, characterized in that the method comprises:
according to the stamping data record of the rotor groove, a control parameter record of a sample rotor stamping die and N sample rotor groove bottom coordinate information sets are obtained;
constructing a rotor slot punching twin model based on the control parameter records of the sample rotor punching die and N sample rotor slot bottom coordinate information sets;
acquiring a rotor control parameter range of rotor slot stamping die control parameters, randomly generating a plurality of rotor initial solutions in the rotor control parameter range, and constructing a rotor slot stamping database when the rotor initial solutions meet rotor constraint conditions;
repeatedly optimizing in the rotor slot punching database, and updating the rotor slot punching database;
and outputting the rotor stamping die control parameter with the maximum rotor fitness after the repetition number reaches the preset repetition number, and obtaining the optimal rotor stamping die control parameter.
4. A mating accuracy control system for a motor stator and rotor stamping die, wherein the system performs the method of any one of claims 1-3, the system comprising:
the primary stamping module is used for stamping the stator wafer and the rotor wafer through a primary stamping station according to design parameters of the stator wafer and the rotor wafer, wherein the stator wafer comprises a stator shaft hole, and the rotor wafer comprises a rotor shaft hole;
the stator objective function construction module is used for optimizing a stamping station through a stator, collecting images of the stator wafer and the rotor wafer, extracting coordinate information of a stator shaft hole, constructing stator constraint conditions and stator objective functions for optimizing control parameters of a stamping die for stamping stator slots, and calculating fitness according to the distances between M stator slots and the stator shaft hole, wherein M is an integer larger than 1;
the stator punching sheet obtaining module is used for optimizing stator punching die control parameters according to the stator shaft hole coordinate information and adopting stator constraint conditions and stator objective functions to obtain optimal stator punching die control parameters, controlling a stator punching die and punching a stator wafer to obtain a stator punching sheet;
the rotor objective function construction module is used for optimizing a stamping station through a rotor, collecting stator punching images, combining the rotor wafer images, extracting and obtaining rotor shaft hole coordinate information and central coordinate information of M stator slots, and constructing rotor constraint conditions and rotor objective functions for optimizing stamping die control parameters of rotor slot stamping;
the die control parameter obtaining module is used for optimizing the rotor stamping die control parameters by adopting rotor constraint conditions and rotor objective functions according to the rotor shaft hole coordinate information and the central coordinate information of the M stator slots to obtain optimal rotor stamping die control parameters;
the rotor punching sheet obtaining module is used for controlling the rotor punching die by adopting optimal rotor punching die parameters and punching the rotor wafer to obtain the rotor punching sheet.
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