A method and system for controlling localized adhesive coating on the outer surface of a metal circular part.

Abstract

This invention provides a control method and system for localized adhesive coating on the outer surface of a metal circular part, belonging to the field of intelligent adhesive coating control technology. The method first acquires the current outer surface image and process task data of the metal circular part to be coated, determining the target localized adhesive coating area, the state detection area, and the target adhesive line parameters. Then, it releases probe adhesive dots in the state detection area, collects a sequence of dynamic images, and extracts the spreading length, edge expansion rate, necking rate, wire breakage delay, and retraction displacement to form a dynamic morphological feature sequence. This dynamic morphological feature sequence is input into an adhesive rheological state inversion model to obtain the current adhesive rheological state parameters. Localized adhesive coating is then implemented according to the formal adhesive coating control command, and the localized adhesive line formation result is output based on the outer surface result detection record. This invention can identify the current flow state of the adhesive before formal adhesive coating and adjust the adhesive coating control parameters accordingly, improving the stability of adhesive line formation in localized adhesive coating on the outer surface of the metal circular part.

Description

Technical Field

[0001] This invention relates to the field of intelligent adhesive coating control technology, and in particular to a control method and system for local adhesive coating on the outer surface of a metal circular part. Background Technology

[0002] The process of applying adhesive to the outer surface of metal circular parts is widely used in production scenarios such as sealing assembly, anti-loosening fixation, and partial bonding. This type of process usually requires the adhesive to be accurately applied to a defined arc segment on the outer surface of the circular part, so that the length, width, and thickness of the adhesive line meet the requirements of subsequent assembly.

[0003] In actual production, the quality of localized adhesive application is not only affected by the control of the application location, but also directly by the flow state of the adhesive at that time. The same type of adhesive will exhibit different spreading speeds, shrinkage degrees, and filament breakage times under different production cycles due to changes in ambient temperature, settling time, differences in the preceding shearing process, and changes in residual pressure in the pipeline.

[0004] In continuous coating scenarios, local fluctuations can be balanced to some extent by subsequent continuous coating. However, in scenarios involving localized coating of the outer surface of a metal circular component, the target arc is short, and the coating opening and closing processes are concentrated. If the adhesive spreads too quickly, coating is delayed, the tail end retracts, or the filament breaks too late during the initial coating stage, it can easily lead to adhesive buildup at the front, thinning at the back, filament dragging at the tail end, or localized adhesive shortages. Existing coating control technologies mostly rely on fixed process parameters or minor empirical adjustments, lacking the identification and utilization of the actual flow state of the adhesive, making it difficult to maintain stable localized adhesive line quality under different operating conditions. Therefore, we propose a control method and system for localized coating of the outer surface of a metal circular component.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may contain prior art information that is not common knowledge to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a method and system for controlling the local coating of adhesive on the outer surface of metal circular parts, thereby solving the technical problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A method for controlling localized adhesive application on the outer surface of a metal circular component includes the following steps: S1. Obtain the current outer surface image and process task data of the metal round part to be coated with glue, perform image correction and coordinate unification processing on the current outer surface image, and determine the target local coating area, state detection area and target glue line parameters. S2. Release the probe glue dots in the state detection area and continuously collect the detection dynamic image sequence of the probe glue dots within the preset sampling period. Perform time-series analysis on the detection dynamic image sequence and output the dynamic morphology feature sequence. S3. Input the dynamic morphology feature sequence into the adhesive rheological state inversion model, obtain the adhesive rheological state parameters, verify the validity of the adhesive rheological state parameters, and output the current adhesive rheological state parameters. S4. Read the current adhesive rheological state parameters, target local adhesive application area and target adhesive line parameters, establish formal adhesive application constraint relationship, obtain formal adhesive application control parameters, perform executability verification on formal adhesive application control parameters, and output formal adhesive application control command. S5. Based on the formal glue application control command, control the glue dispensing component and the drive component to apply local glue to the target local glue application area, obtain the local glue line execution result and the outer surface result detection record, and output the local glue line forming result according to the target glue line parameters.

[0008] S1 specifically includes: reading the current outer surface image and process task data of the metal round part to be coated, deleting invalid image records and invalid process task data records, performing image correction and coordinate unification processing on the retained current outer surface image, and outputting the outer surface characterization image of the round part. Based on the surface characterization image of the circular part and the process task data, the outer contour boundary line, circumferential baseline and surface structure feature point set are extracted to determine the location data of the target local glue coating area. Based on the target local adhesive coating area location data and process task data, the status detection area is screened and verified, and the status detection area location data and target adhesive line parameters are generated.

[0009] S2 specifically includes: Read the position data of the status detection area, the target glue line parameters and the current equipment parameter record, determine the preset glue amount to be detected, release the detection glue point in the status detection area, verify the initial forming state of the detection glue point, and output the initial state record of the detection glue point. Based on the initial state record of the detected glue dots, images of the detected glue dots are continuously acquired within a preset sampling period. Invalid frames are deleted, and a sequence of dynamic images of the detected glue dots is output in order of sampling time. Temporal image analysis is performed on the dynamic image sequence to extract the spreading length, edge expansion rate, necking rate, wire breakage delay, and retraction displacement. Abnormal morphological feature records are deleted, and the dynamic morphological feature sequence is output.

[0010] S3 specifically includes: Read the dynamic morphological feature sequence, product model identifier field and model parameter set record, verify the correspondence of the three, and statistically compress the dynamic morphological feature sequence to form an input feature vector. Calculate the candidate state score set based on the input feature vector. Read the candidate state score set and dynamic morphology feature sequence, determine the current preliminary selection state, calculate the spreading ability parameter, retraction sensitivity parameter, filament breakage delay parameter and line formation stability parameter, and output the adhesive rheological state parameter record; Read the rheological state parameter records and dynamic morphological feature sequences of the adhesive solution, perform range verification and consistency verification on the rheological state parameter records of the adhesive solution, delete invalid records, and output the current rheological state parameter records of the adhesive solution.

[0011] S4 specifically includes: Read the current adhesive rheological state parameter record, target local adhesive application area location data, target adhesive line parameters and current equipment capacity record, verify each input object, and establish a formal adhesive application constraint record; Read the formal adhesive application constraint record and the basic process parameter record, and correct the basic process parameter record based on the current adhesive rheological state parameter record. Calculate the adhesive pressure, valve opening time, valve closing time, nozzle-outer surface distance, and metal circular part rotation speed to form the formal adhesive application control parameter record. Read the formal glue application control parameter record, current equipment capacity record, target glue line parameters, and target local glue application area location data. Perform range verification and logic verification on the formal glue application control parameter record, correct or delete records that do not meet the conditions, and output the formal glue application control command.

[0012] S5 specifically includes: Read the formal glue application control command, target local glue application area location data and current equipment status record, perform start verification on each input object, control the glue dispensing component and drive component to enter the formal glue application preparation state, and output the formal glue application preparation ready record. Read the formal glue application preparation record, formal glue application control command and target local glue application area position data, control the valve to perform opening, continuous glue dispensing and closing actions, collect formal glue application execution feedback record, and output local glue line execution record; Read the local adhesive line execution record, target adhesive line parameters, and current outer surface result detection record; extract the actual adhesive line length, actual adhesive line width, and actual adhesive line thickness; determine the deviation; and output the local adhesive line forming result record.

[0013] A control system for locally applying adhesive to the outer surface of a metal circular part includes an image acquisition unit, a task data reading unit, a detection and execution unit, a timing analysis unit, a state inversion unit, a parameter solving unit, an execution control unit, and a result detection unit.

[0014] The beneficial effects of this invention are as follows: This invention releases probe adhesive dots in the state detection area before formal adhesive application, extracts dynamic morphological feature sequences based on the dynamic image sequence of the probe, and then inverts to obtain the current rheological state parameters of the adhesive, thereby obtaining the control parameters for formal adhesive application. This allows for the identification of the current flow state of the adhesive before formal adhesive application and the synchronous adjustment of the control strategy, fundamentally reducing the sensitivity of the local short arc segment adhesive application process to adhesive state fluctuations, improving the stability of local adhesive line formation, and directly addressing the problem in existing technologies that it is difficult to adjust according to the real-time state of the adhesive.

[0015] This invention determines the target local coating area and status detection area by uniformly processing the current external surface image, process task data and coordinates. This ensures that the selection of detection position, determination of formal coating position and subsequent control parameter calculation maintain a unified coordinate basis, which can reduce position identification error and area switching error, and improve the control accuracy of the local coating start position and end position.

[0016] This invention transforms the spreading length, edge expansion rate, necking rate, filament breakage delay, and retraction displacement into a dynamic morphological feature sequence, and uses this sequence to calculate spreading capability parameters, retraction sensitivity parameters, filament breakage delay parameters, and line formation stability parameters. This allows changes in the appearance of the adhesive to be transformed into calculable and retrievable control data, thereby avoiding reliance on fixed process parameters or manual experience adjustments and improving the process adaptability under different batches and cycle conditions.

[0017] This invention establishes a formal adhesive coating constraint record based on the current rheological state parameters of the adhesive solution, the target adhesive line parameters, and the current equipment capacity record. It also makes directional corrections to the basic process parameter record, which enables a coordinated matching relationship between the dispensing pressure, valve opening time, valve closing time, nozzle-outer surface distance, and metal circular part rotation speed. This reduces the probability of defects such as adhesive buildup at the front, thinning at the rear, stringing at the tail end, and localized adhesive shortage.

[0018] This invention sets up start verification, execution feedback, abnormal interruption and result detection links in the formal glue application stage. Based on the local glue line execution record and the current outer surface result detection record, it judges the deviation of the actual glue line length, actual glue line width and actual glue line thickness. It can identify execution abnormalities and forming abnormalities in a timely manner, improve the traceability and result consistency of the local glue application process, and reduce the cost of invalid glue application and rework. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a method for controlling the local coating of adhesive on the outer surface of a metal circular part according to the present invention; Figure 2 This is a schematic diagram of the control system framework for locally applying adhesive to the outer surface of a metal circular part according to the present invention. Detailed Implementation

[0020] 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.

[0021] Example 1: As Figure 1 As shown, this embodiment provides a method for controlling localized adhesive coating on the outer surface of a metal circular component, including the following steps: S1. Obtain the current outer surface image and process task data of the metal round part to be coated with glue, perform image correction and coordinate unification processing on the current outer surface image, and determine the target local coating area, state detection area and target glue line parameters. S2. Release the probe glue dots in the state detection area and continuously collect the detection dynamic image sequence of the probe glue dots within the preset sampling period. Perform time-series analysis on the detection dynamic image sequence and output the dynamic morphology feature sequence. S3. Input the dynamic morphology feature sequence into the adhesive rheological state inversion model, obtain the adhesive rheological state parameters, verify the validity of the adhesive rheological state parameters, and output the current adhesive rheological state parameters. S4. Read the current adhesive rheological state parameters, target local adhesive application area and target adhesive line parameters, establish formal adhesive application constraint relationship, obtain formal adhesive application control parameters, perform executability verification on formal adhesive application control parameters, and output formal adhesive application control command. S5. Based on the formal glue application control command, control the glue dispensing component and the drive component to apply local glue to the target local glue application area, obtain the local glue line execution result and the outer surface result detection record, and output the local glue line forming result according to the target glue line parameters.

[0022] S1 specifically includes the following sub-steps: S110. First, read the current outer surface image record set and process task data record, and perform consistency verification on the two before proceeding to subsequent processing.

[0023] The current outer surface image record set refers to the image record set acquired by the same metal round part to be coated at the current work station. Each image record contains at least the image number field, acquisition time field, exposure status field, edge sharpness field, and viewing angle identifier field. Process task data record refers to the production task record corresponding to the metal round part to be coated with glue, and includes at least the product model identification field, the target local glue application location requirement field, the target glue line length requirement field, the target glue line width requirement field, and the target glue line thickness requirement field.

[0024] After reading the data, the system first verifies the corresponding data based on the product model identifier field, and then verifies the validity based on the image availability field. If the image number field is empty, the exposure status field is marked as overexposed or underexposed, the edge sharpness field is lower than the preset sharpness threshold, or the product model identifier field in the process task data record is inconsistent with the production batch identifier of the current metal round part to be coated, the corresponding image record or process task data record will be determined as an invalid record and deleted. The edge sharpness field is obtained by performing gradient edge detection on the image and calculating the average edge gradient intensity, followed by normalization. The value range is 0 to 1. The edge sharpness threshold is set to 0.85. When the edge sharpness field is lower than 0.85, the corresponding image record is directly deleted and does not participate in the subsequent region determination.

[0025] Image correction and coordinate unification processing are performed on the current set of outer surface image records after deleting invalid records. Image correction includes at least brightness normalization processing and edge localization processing. Brightness normalization processing is used to compress grayscale abrupt changes in local high reflectivity areas, and edge localization processing is used to stabilize the extraction of the outer contour of the metal circular part. Coordinate unification processing is used to convert image pixel coordinates into unified coordinates that can be used to subsequently determine the circumferential and axial ranges. Coordinate unification processing is performed according to the following formula: in, Let be the horizontal pixel coordinates of the i-th pixel. Let be the vertical pixel coordinate of the i-th pixel. Let be the circumferential coordinates of the i-th pixel. Let be the axial coordinate corresponding to the i-th pixel, T be the transformation matrix from image coordinates to unified coordinates of the outer surface, and 1 be the homogeneous coordinate constant in the coordinate transformation. After completing the coordinate mapping of all retained pixels according to the above formula, the outer surface representation image of the circular part is output. The outer surface representation image of the circular part refers to the unified image object that has completed image correction and carries circumferential and axial coordinates.

[0026] S120: First, read the surface characterization image of the round part and the process task data record, verify the correspondence between the two, and if the matching relationship of the same product model identification field is not met, delete the matching relationship and return to S110 to read again.

[0027] After verification, the outer contour boundary line, circumferential reference line and surface structure feature point set are extracted from the characterization image of the outer surface of the round part. The outer contour boundary line is used to define the actual usable boundary of the outer surface of the metal round part, the circumferential reference line is used to unify the starting point of circumferential measurement, and the surface structure feature point set is used to provide structural reference for the local glue application position. The surface structure feature point set consists of at least one or more of the following: flange edge, step transition line, groove boundary line and stamping indentation line.

[0028] Then, the target local adhesive application location requirement field is read and matched with the outer contour boundary line, circumferential baseline, and surface structure feature point set. Specifically, the starting position of the target local adhesive application is first determined in the circumferential coordinates, and then the corresponding strip area is defined in the axial coordinates, thereby obtaining the starting circumferential coordinates, ending circumferential coordinates, starting axial coordinates, and ending axial coordinates of the target local adhesive application area. To avoid the output object being too general, This step organizes the calculation results into target local glue application area location data. The target local glue application area location data includes at least the area number field, the starting circumferential coordinate field, the ending circumferential coordinate field, the starting axial coordinate field, and the ending axial coordinate field. For example, when the target local glue application location requirement field limits the glue line to be within 5 mm to 8 mm below the flange, this step directly outputs the corresponding axial coordinate boundary.

[0029] S130: First, read the target local adhesive coating area location data and process task data record, and verify whether there is a continuous outer surface area outside the target local adhesive coating area; when there is no outer surface area outside the target local adhesive coating area that meets the continuity requirement, delete the current target local adhesive coating area location data and return to S120 to redetermine, so as to avoid losing the actual bearing surface in the subsequent state detection area selection.

[0030] After verification, a candidate set of status detection areas is selected from the continuous areas outside the target local glue coating area and located on the same outer surface of the metal circular part to be coated. During the selection, candidate areas that overlap with the target local glue coating area are first deleted, then candidate areas with burrs, holes or obvious structural changes are deleted, and finally candidate areas with an area smaller than the preset detection area threshold are deleted.

[0031] To transform the constraint of not affecting the formal glue application function into an executable rule, let A be the target local glue application area and B be the candidate region of the state detection area. Let d_0 be the minimum boundary distance between the target local adhesive application area and the candidate area of ​​the state detection area, and let d_0 be the preset minimum isolation distance. Then, the retention rule for the candidate area of ​​the state detection area is: Where p is the boundary point of the target local coating area, and q is the boundary point of the candidate region of the state detection area; Represents the Euclidean distance between boundary point p and boundary point q, when When this happens, the corresponding candidate region is directly deleted and not added to the retention set. A preset minimum isolation distance is set. The setting can be set to 3 mm based on the process cycle and the detection range of adhesive dots.

[0032] For the retained candidate set of state detection zones, surface continuity verification is performed, and the state detection zone location data is output. Simultaneously, the target adhesive line length requirement field, target adhesive line width requirement field, and target adhesive line thickness requirement field are read, and the numerical ranges are verified. Records exceeding the process allowable range are deleted, and the retained records are integrated into the target adhesive line parameters. Let G be the target adhesive line parameter set, L be the target adhesive line length, W be the target adhesive line width, and H be the target adhesive line thickness, then... The target adhesive line width W can be limited to the range of 1.2 mm to 2.0 mm. The final output includes the location data of the detection area, the location data of the target local adhesive area, and the target adhesive line parameters, which can be used for subsequent detection of adhesive dot release, adhesive rheological state inversion, and formal adhesive application control.

[0033] S2 specifically includes the following sub-steps: S210. First, read the position data of the status detection area, the target adhesive line parameters and the current equipment parameter record, and perform consistency verification on the three before releasing the detection adhesive point.

[0034] The current equipment parameter record refers to the equipment record corresponding to the actual working state of the dispensing component at the current workstation, and includes at least the needle inner diameter field, pipeline pressure field, valve response delay field, nozzle-outer surface distance field, and current ambient temperature field. After reading, first verify whether the position data of the status detection area is within the reachable range of the dispensing component, and then verify whether the target glue line parameter is within the allowable execution range corresponding to the current equipment parameter record. If the position data of the status detection area exceeds the movement stroke, or the target glue line parameter does not match the current needle inner diameter field or pipeline pressure field, delete the current detection trigger record and return to the previous step to regenerate the input.

[0035] After verification, the preset amount of glue to be detected is determined based on the target glue line parameters and the current equipment parameters. The preset amount of glue to be detected is not an arbitrarily given test quantity, but a detection quantity calculated according to the preset ratio of the glue quantity per unit length. Its purpose is to enable the detection glue point to truly represent the current glue flow dynamics, while avoiding covering the target local glue coating area. For example, when the target adhesive line width is 1.6 mm and the target adhesive line thickness is 0.4 mm, the preset detected adhesive amount can be set to 15% of the corresponding formal unit length adhesive amount. Then, the dispensing component is controlled to move to the landing point coordinates corresponding to the status detection area position data, and the detection adhesive point is released according to the preset detected adhesive amount; Immediately after release, the initial forming state of the probe glue dot is verified. The verification includes at least whether the probe glue dot falls within the boundary of the state detection area, whether a continuous glue dot outline is formed, and whether there are obvious breaks or deviations. When the center coordinates of the probe glue dot are out of bounds, the initial outline is discontinuous, or the glue dot length is lower than the preset minimum forming length, the corresponding probe glue dot record is determined to be an invalid record and deleted, and the probe glue dot release is triggered again.

[0036] For the retained valid probe dots, the initial state record of the probe dots is output. The initial state record of the probe dots includes at least the probe dot number field, the release time field, the initial landing point coordinate field, the initial contour boundary field, and the initial length field. Among them, the release time field serves as the unified zero time for subsequent temporal sampling, and the initial contour boundary field serves as the boundary reference for subsequent image segmentation and comparison.

[0037] S220. First, read the initial state record of the probe glue dot and the current device parameter record, and verify the sampling start point, sampling period and image acquisition conditions; among them, the release time field in the initial state record of the probe glue dot is defined as the time zero point, which is used to unify the time stamp of all subsequent sampling frames.

[0038] If the release time field is missing, the camera trigger status field in the current device parameter record is abnormal, or the image acquisition device is not in synchronous sampling state, delete the current sampling task record and return to S210 to re-form the probe glue point.

[0039] After verification, the preset sampling period and sampling interval are determined based on the valve response delay field, ambient temperature field and target adhesive line parameters in the current equipment parameter record. The preset sampling period covers at least the initial spreading stage, edge change stage and tail retraction stage after the release of the probe adhesive point. The sampling interval is used to ensure that the morphological differences between two adjacent frames can be stably measured. For example, the sampling interval can be set to 5 milliseconds, and the total sampling duration can be set to 300 milliseconds. The release time is k, and the sampling sequence number is k. The sampling interval is... Let k be the sampling time of the k-th frame. Then, the sampling times of each frame are generated by the following formula: Images of the probe dots are continuously acquired according to the sampling time sequence, and a probe image record is generated for each frame. The probe image record includes at least the frame number field, sampling time field, focus score field, reflection saturation ratio field, and image data field.

[0040] During the acquisition process, each frame is first validated, and then invalid frames are deleted. Specifically, when the focus score field is lower than the preset sharpness threshold, the reflectivity saturation ratio field is higher than the preset saturation threshold, the sampling time field is missing, or the detection glue dot area in the image data field is occluded, the corresponding detection image record is determined to be an invalid frame and deleted. For example, detection image records with a reflectance saturation ratio higher than 20% are directly deleted and not included in subsequent topography calculations. After deletion, the remaining detection image records are sorted in ascending order by the sampling time field, and a detection dynamic image sequence is output. The detection dynamic image sequence refers to a set of time-series images with a unified time base and invalid frames have been removed.

[0041] S230: First, read the detection dynamic image sequence and verify the sequence continuity and boundary separability. When the sampling time fields of two adjacent frames are not continuous, the number of valid frames is less than the preset minimum number of frames, or a separable boundary cannot be formed between the detection glue point and the background of the outer surface of the metal circle, delete the corresponding detection dynamic image sequence and return to S220 to re-acquire, so as to ensure that the subsequent extracted dynamic morphology feature sequence has a continuous time basis.

[0042] After verification, the detection glue dot region is segmented for each frame of image to obtain the glue dot boundary corresponding to that frame. The glue dot boundary refers to the closed boundary line between the detection glue dot and the background of the outer surface of the metal circle, which is used for subsequent measurement of the spreading length, leading edge position, narrowest cross-sectional width and tail position.

[0043] Then, the morphological quantities of each frame are calculated frame by frame using a unified measurement direction. The spreading length is defined as the maximum projected length of the adhesive dot along the preset main extension direction; the leading edge position is defined as the coordinates of the foremost point of the adhesive dot in the main extension direction; the narrowest cross-sectional width is defined as the minimum lateral width of the adhesive dot in the middle; and the tail position is defined as the coordinate position of the rear boundary of the adhesive dot in the same direction. After completing the single-frame measurement, the changes are calculated for adjacent frames to obtain the edge expansion rate, necking rate, and filament breakage delay. The edge expansion rate is calculated using the following formula: in, Let be the unfolding length of the k-th frame. Let be the unfolding length of the (k+1)th frame. The edge expansion rate is the distance between frame k and frame (k+1). The sampling interval is defined as follows: similarly, the necking rate is obtained by dividing the difference in the narrowest cross-sectional width between two adjacent frames by the sampling interval; the wire breakage delay is defined as the time difference between the release time and the moment when the continuity marker field first changes from continuous to interrupted.

[0044] The calculated morphological feature records are further checked for outliers. When the deviation of the spread length field of a certain frame from the average value of the two adjacent frames exceeds the preset deviation threshold, or when the leading edge position field shows a jump that is opposite to the time sequence, the morphological feature record corresponding to that frame is judged as an outlier and deleted. For example, records with a spread length field deviation exceeding 30% of the average of two adjacent frames are directly deleted. After deleting abnormal records, the remaining morphological feature records are sorted in ascending order by the sampling time field and combined to output a dynamic morphological feature sequence. The dynamic morphological feature sequence includes at least the spread length sequence, edge expansion rate sequence, necking rate sequence, wire breakage delay value, and retraction displacement sequence.

[0045] S3 specifically includes the following sub-steps: S310. First, read the dynamic morphological feature sequence, product model identifier field and model parameter set record, and perform correspondence verification on the three before performing state mapping processing.

[0046] The model parameter set record refers to the parameter record established in advance for different product models and corresponding adhesive conditions. It includes at least the parameter set number field, the applicable model field, the version field, the feature weight field, the state threshold field, and the state mapping interval field. The feature weight field is used to characterize the contribution of spreading length, edge expansion rate, necking rate, filament breakage delay, and retraction displacement to the rheological state judgment. The state threshold field is used to limit the effective lower limit of candidate state judgment. The state mapping interval field is used to limit the range of acceptable state parameters.

[0047] After reading, first verify whether the dynamic morphology feature sequence contains a complete spread length sequence, edge expansion rate sequence, necking rate sequence, wire breakage delay value and retraction displacement sequence. Then verify whether the product model identifier field can find a unique corresponding applicable model field in the model parameter set record, and verify whether the version field is the currently enabled version. When the dynamic morphology feature sequence has missing fields, multiple enabled versions corresponding to the same product model identifier field, or the model parameter set record is in a disabled state, delete the current mapping task record and return to S230 to re-output the dynamic morphology feature sequence. After verification, the dynamic morphology feature sequence is statistically compressed to form an input feature vector. Statistical compression refers to calculating the average growth of the spreading length sequence, the average value of the edge expansion rate sequence, the average absolute value of the necking rate sequence, the wire breakage delay value itself, and the peak value of the retraction displacement sequence, thereby transforming the time series data into a fixed-length feature set that can participate in state scoring. For example, when a detection yields an average edge expansion rate of 0.18 mm per millisecond, a wire breakage delay of 42 milliseconds, and a peak retraction displacement of 0.31 mm, these values ​​are directly written into the input feature vector, and descriptive judgments are no longer retained.

[0048] The scores for each candidate state are calculated using the following formula: in, Let j be the j-th feature value in the input feature vector. Let be the weight of the j-th feature under candidate state m. Let be the score of candidate state m, n be the number of features in the input feature vector, and m be the index number of the candidate state. After calculating the score of each candidate state according to the above formula, delete the candidate state items whose scores are lower than the lower limit corresponding to the state threshold field, sort the remaining results in descending order of scores, and output the candidate state score set. The candidate state score set shall at least contain the state label field, the state score field, and the corresponding parameter set number field.

[0049] S320: First, read the candidate state score set, dynamic morphology feature sequence, and state mapping interval field, and verify the completeness of the candidate state score set. When the candidate state score set is empty, the highest state score field is missing, or the difference between the highest state score and the second highest state score is lower than the preset distinction threshold, delete the current candidate state score set and return to S310 to re-execute the state mapping process to avoid directly outputting the adhesive rheological state parameters when the state attribution is unclear.

[0050] After verification, the candidate state with the highest score is selected as the current initial state, and the rheological state parameters of the adhesive are obtained by combining the measured values ​​in the dynamic morphology feature sequence. The rheological state parameters of the adhesive include spreading ability parameters, shrinkage sensitivity parameters, filament breakage delay parameters, and filament formation stability parameters; The spreading ability parameter is determined by the average growth of the spreading length sequence and the average value of the edge expansion rate sequence, and is used to characterize the spreading trend of the adhesive on the outer surface. The retraction sensitivity parameter is determined by the peak value of the retraction displacement sequence and is used to characterize the degree of tail end retraction after wire breakage. The filament breakage delay parameter is determined by the filament breakage delay value and is used to characterize the ability of the adhesive to maintain a continuous dispensing pattern. The line formation stability parameters are jointly determined by the spread length sequence fluctuation, the edge expansion rate sequence fluctuation, and the necking rate sequence fluctuation, and are used to characterize the uniformity of the adhesive line formation process.

[0051] To facilitate direct calls by S330 and S410 in subsequent steps, this step converts the above parameters into normalized values. Let V be the original calculated value of a certain parameter. This is the lower limit of the parameter in the state mapping range field. Let P be the upper limit of the parameter in the state mapping interval field, and P be the normalized parameter value. Then, the normalization process is performed as follows: The spreading capability parameter field, shrinkage sensitivity parameter field, wire breakage delay parameter field, and wire formation stability parameter field are obtained according to the above formula. For example, when the original calculated value of the spreading capability parameter is 0.64, the corresponding state mapping interval field is 0.20 to 0.80, and the normalized spreading capability parameter field is 0.73.

[0052] After processing the fields of the normalized results, the adhesive rheological state parameter record is output. The adhesive rheological state parameter record should include at least the parameter record number field, the spreading ability parameter field, the shrinkage sensitivity parameter field, the filament breakage delay parameter field, the line formation stability parameter field, and the initial state label field.

[0053] S330: First, read the rheological state parameter record, dynamic morphology feature sequence and state threshold field of the adhesive solution, and then perform range verification, consistency verification and rollback determination in sequence.

[0054] During range verification, first check whether the spreading capability parameter field, shrinkage sensitivity parameter field, and line formation stability parameter field are within the closed interval of 0 to 1, and then check whether the filament breakage delay parameter field is greater than 0; when any field exceeds the corresponding range, delete the current adhesive rheological state parameter record and return to S310 to re-execute the state mapping process.

[0055] During consistency verification, each parameter field in the adhesive rheological state parameter record is compared item by item with the verification reference parameters derived from the dynamic morphology feature sequence. The verification reference parameters are reference values ​​directly calculated based on the dynamic morphology feature sequence and are used only for verification; they are not used in the final output. Therefore, the consistency verification conditions are: in, This is a value of a specific output parameter in the rheological state parameter record of the adhesive solution. This serves as a reference parameter value for the same type of verification. The preset deviation threshold is set for this type of parameter; when the difference between a certain output parameter value and the corresponding verification reference parameter value is greater than the preset deviation threshold, the record of the adhesive rheological state parameter is deleted.

[0056] To ensure consistency between the rollback path and the source of the anomaly, this step further distinguishes the reasons for deletion: when the reason for deletion is that the parameter field is out of range, return to S310 to re-call the model parameter set record for state mapping; when the reason for deletion is that the consistency fails due to abnormal fluctuations in the dynamic morphology feature sequence, return to S230 to regenerate the dynamic morphology feature sequence; when the consistency verification still fails after two consecutive rollbacks, return to S210 to release the probe glue point and start the next round of probing.

[0057] After verification, the current adhesive rheological state parameter record is output. The current adhesive rheological state parameter record refers to the only valid parameter record that is allowed to enter the formal adhesive application control solution after range verification and consistency verification. It includes at least the parameter record number field, the spreading ability parameter field, the shrinkage sensitivity parameter field, the filament breakage delay parameter field, the line formation stability parameter field, and the valid mark field. For example, when the spreading capability parameter field is 0.72, the shrinkage sensitivity parameter field is 0.28, the filament breakage delay parameter field is 0.81, and the yarn formation stability parameter field is 0.67, they can be directly used as inputs for solving the formal adhesive application control parameters in S410.

[0058] S4 specifically includes the following sub-steps: S410. First, read the current adhesive rheological state parameter record, target local adhesive application area location data, target adhesive line parameters and current equipment capability record, and perform integrity verification, consistency verification and solvability verification on the four types of input objects before establishing the formal adhesive application constraint record.

[0059] The current equipment capacity record refers to the actual allowable output capacity boundary record of the equipment at the current workstation. It includes at least the equipment number field, the upper limit field of dispensing pressure, the lower limit field of dispensing pressure, the shortest valve opening time field, the longest valve opening time field, the upper limit field of the distance between the nozzle and the outer surface field, the lower limit field of the distance between the nozzle and the outer surface field, the upper limit field of the rotation speed of the metal round part field, and the lower limit field of the rotation speed of the metal round part field.

[0060] After reading, first verify whether the valid marker field in the current adhesive rheological state parameter record is valid, then verify whether the target local coating area location data is within the reach of the equipment, then verify whether the target adhesive line length field, target adhesive line width field and target adhesive line thickness field in the target adhesive line parameter are complete, and finally verify whether the product model identification field of the four types of records is consistent. If there is an invalid valid marker field, out-of-bounds area coordinates, missing target adhesive line parameters, or inconsistent product model identification, delete the current solution task record and return to S330 or S130 to regenerate the corresponding input.

[0061] After verification, establish parameter constraint relationships between the current adhesive rheological state parameter records and the formal adhesive coating quality requirements. Among them, the spreading ability parameter field is used to constrain the dispensing pressure field and the nozzle-outer surface distance field, the retraction sensitivity parameter field is used to constrain the valve closing time field, the filament breakage delay parameter field is used to constrain the valve opening time and valve closing time, and the line formation stability parameter field is used to constrain the metal round part rotation speed field. Meanwhile, the target glue line length field, target glue line width field, and target glue line thickness field together define the value boundaries of the above control parameters. The current equipment capability record further limits each control parameter to ensure it does not exceed the upper and lower limits of equipment execution. To facilitate direct subsequent use, the above constraints are organized into a formal glue application constraint record. Let R be the formal glue application constraint record, then: in, Here, G represents the current rheological state parameters of the adhesive solution, D represents the target adhesive line parameter set, and D represents the current equipment capacity record. To constrain generation relations, specifically, constrain generation relations. This refers to the processing relationship that converts state parameters, glue line parameters, and equipment capability boundaries into allowable ranges of control parameters.

[0062] The formal adhesive application constraint record includes at least the pressure constraint field, the opening time constraint field, the closing time constraint field, the spacing constraint field, and the rotation speed constraint field; preferably, for example, when the spreading capacity parameter field is 0.72, the target adhesive line width field is 1.6 mm, and the upper limit of dispensing pressure field is 0.38 MPa, the output pressure constraint field can be limited to 0.27 MPa to 0.34 MPa.

[0063] S420. First, read the formal adhesive application constraint record and the basic process parameter record, and then perform matching verification, range verification and solution validity verification on the two before solving the formal adhesive application control parameter record.

[0064] Basic process parameter records refer to the standard adhesive application parameter records that are pre-saved for the current product model, which at least include the basic dispensing pressure field, the basic valve opening time field, the basic valve closing time field, the basic nozzle-to-outer surface distance field, and the basic metal round part rotation speed field.

[0065] After reading, first verify whether there is a unique record in the basic process parameter record, and then verify whether each field falls within the allowable range defined by the formal adhesive application constraint record; when the basic process parameter record does not exist, there are multiple records of the same model being enabled, or any basic field exceeds the corresponding constraint range, delete the current solution task record and return to S410 to regenerate the formal adhesive application constraint record.

[0066] After verification, based on the basic process parameter records, targeted corrections are performed on each control parameter. Targeted correction refers to adjusting the basic process values ​​by adding or subtracting parameters based on the current rheological state parameters of the adhesive, rather than arbitrarily assigning new control values. Let... Let p be the formal adhesive application control parameter, then: in, These are the corresponding basic process values. For correction amount, It is determined jointly by the formal adhesive application constraint record and the current adhesive rheological state parameter record. p is the index number of the control parameter, with a value range of... These correspond to the dispensing pressure, valve opening time, valve closing time, nozzle-outer surface distance, and metal circular component rotation speed, respectively.

[0067] In specific solutions, when the spreading capacity parameter increases, prioritize reducing the dispensing pressure or increasing the nozzle-to-outer-surface distance to suppress excessive spreading on the outer surface; when the retraction sensitivity parameter increases, prioritize advancing the valve closing time to reduce the risk of necking caused by tail pullback. When the wire breakage delay parameter increases, the valve opening time field is advanced and the valve closing time field is appropriately delayed to ensure continuous line formation at both ends; when the line formation stability parameter field decreases, the metal component rotation speed field is lowered to improve the uniformity of the glue line.

[0068] After the solution is completed, all parameters are deleted for abnormal solutions. Any parameters with negative times, valve opening times later than valve closing times, spacing less than the equipment safety clearance, or speed exceeding the speed constraint fields are deleted and the solution is resolved.

[0069] The retained results are organized into a formal glue application control parameter record. The formal glue application control parameter record shall include at least the control parameter record number field, glue dispensing pressure field, valve opening time field, valve closing time field, nozzle-to-outer surface distance field, metal component rotation speed field, and solution source field. For example, when the basic dispensing pressure field is 0.32 MPa, the spreading capacity parameter field is 0.72, and the shrinkage sensitivity parameter field is 0.28, the dispensing pressure field can be corrected to 0.29 MPa, and the valve closing time field can be advanced by 6 milliseconds.

[0070] S430: First, read the formal glue application control parameter record, current equipment capacity record, target glue line parameters and target local glue application area location data, and then sequentially perform single-item range verification, parameter logic verification, coverage capability verification and correction rollback judgment before outputting the formal glue application control command.

[0071] During individual range verification, check whether the adhesive pressure field, valve opening time field, valve closing time field, nozzle-to-outer-surface distance field, and metal component rotation speed field are within the upper and lower limits corresponding to the current equipment capacity record. Assume... For the p-th item, the formal adhesive application control parameter, This is the lower limit for the execution of this parameter. If the execution limit for this parameter is defined, then for the p-th parameter to satisfy the executability condition, it should meet the following: If any parameter does not meet the above conditions, it will not enter the output stage. Instead, the formal glue application control parameter record will be marked as a record to be corrected.

[0072] During parameter logic verification, at least check that the valve opening time field is less than the valve closing time field, and the difference between the two is not less than the valve minimum opening duration field; during coverage verification, based on the starting circumferential coordinate field, ending circumferential coordinate field, and metal component rotation speed field in the target local adhesive area location data, verify whether the local coverage corresponding to the target adhesive line length field can be completed under the current rotation cycle.

[0073] If any logical condition is not met, delete the current formal glue application control parameter record and enter the correction process. The correction adopts a fixed order: first correct the valve opening time field and valve closing time field, then correct the glue application pressure field, then correct the nozzle-to-outer surface distance field, and finally correct the metal round part rotation speed field. The reason for using this order is that the timing of the beginning and end determines first whether the local adhesive line is complete, and then the amount of adhesive and the spreading state. After correction, the above verification is performed again. If it still fails after one correction, it returns to S420 to solve again; if it still fails after two consecutive re-solutions, it returns to S330 to re-output the current adhesive rheological state parameter record.

[0074] For all verified formal glue application control parameter records, output formal glue application control instructions. Formal glue application control instructions shall include at least the instruction number field, glue dispensing pressure setting field, valve opening trigger field, valve closing trigger field, nozzle-to-outer surface distance setting field, metal round part rotation speed setting field, and valid execution mark field. For example, when the dispensing pressure setting field is 0.29 MPa, the valve opening trigger field is 12 milliseconds before the start position, the valve closing trigger field is 8 milliseconds before the end position, and the metal part rotation speed setting field is 46 revolutions per minute, it can be used as a direct input for S510.

[0075] S5 specifically includes the following sub-steps: S510: First, read the formal glue application control command, the target local glue application area location data, and the current equipment status record. Then, perform start verification, position verification, and steady-state verification on the three types of input objects in sequence before entering the formal glue application preparation stage.

[0076] The current equipment status record refers to the status record read in real time by the equipment control unit before formal execution, and includes at least the position mark field, speed feedback field, nozzle-to-outer-surface distance feedback field, dispensing channel connectivity field, and safety interlock status field.

[0077] After reading, first verify whether the valid execution flag field in the formal glue application control command is valid, then verify whether the starting circumferential coordinate field and the starting axial coordinate field in the target local glue application area position data are complete, and then verify whether the glue outlet channel connectivity status field in the current equipment status record is connected and whether the safety interlock status field is released. If any field is missing or its status is abnormal, the currently executed task record is deleted, and the process returns to S430 to re-output the formal adhesive application control command. After verification, the adhesive dispensing component is moved to the position corresponding to the starting circumferential coordinate field and the starting axial coordinate field. Simultaneously, the drive component is controlled to accelerate the metal disc to the metal disc speed setting field in the formal adhesive application control command. During the acceleration process, the speed feedback field is continuously read until the difference between it and the metal disc speed setting field does not exceed the preset speed deviation threshold; at the same time, the nozzle-outer surface distance feedback field is continuously read until it falls within the allowable range corresponding to the nozzle-outer surface distance setting field. For example, when the rotation speed setting field for the metal round part is 46 revolutions per minute, the preset rotation speed deviation threshold can be set to 2 revolutions per minute. When the nozzle-to-outer surface distance setting field is 1.8 mm, the allowable range can be set to 1.7 mm to 1.9 mm. A formal adhesive application preparation ready record is output only when the position marker field is valid, the rotation speed feedback field is stable, and the nozzle-to-outer surface distance feedback field is qualified. The formal adhesive application preparation ready record includes at least the preparation record number field, the preparation completion time field, the starting circumferential coordinate field, the starting axial coordinate field, and the steady-state marker field.

[0078] S520: First, read the formal glue application preparation record, formal glue application control command, and target local glue application area position data, and perform consistency verification on the start circumferential coordinate field, end circumferential coordinate field, valve opening trigger field, and valve closing trigger field of the three. When the starting circumferential coordinate field in the formal glue application preparation ready record is inconsistent with the starting circumferential coordinate field in the target local glue application area position data, or when the valve opening trigger field, valve closing trigger field, and formal glue application control command are not matched, delete the current formal glue application preparation ready record and return to S510 to re-establish the preparation state.

[0079] After verification, the valve is controlled to perform opening, continuous dispensing, and closing actions, using the starting circumferential coordinate field as the opening reference and the ending circumferential coordinate field as the closing reference, combined with the valve opening trigger field and the valve closing trigger field. This causes the adhesive to form a local adhesive line along the circumferential arc segment corresponding to the target local adhesive area position data. During the execution process, a formal adhesive application execution feedback record is generated simultaneously. The formal adhesive application execution feedback record includes at least the feedback time field, dispensing pressure feedback field, rotation speed feedback field, nozzle-to-outer-surface distance feedback field, and valve status field. The above fields are continuously verified. If the deviation of the dispensing pressure feedback field from the dispensing pressure setting field exceeds the preset pressure deviation threshold, or if the speed feedback field, nozzle-to-outer-surface distance feedback field, or valve status field is inconsistent with the current trigger state, the valve is immediately closed, the corresponding abnormal execution segment record is deleted, and the current execution state is marked as incomplete. To make the local glue line coverage length calculable, this step calculates the actual local glue line arc length based on the actual starting circumferential coordinate field and the actual ending circumferential coordinate field; let r be the radius corresponding to the target local glue application area. These are the actual starting circumferential coordinates. The actual circumferential coordinates at the termination point. Given the actual local arc length of the adhesive line, then in, The radian value is used. Based on the calculation result, the retained execution data is organized into local glue line execution records. The local glue line execution record shall include at least the execution record number field, the actual start time field, the actual stop time field, the actual start circumferential coordinate field, the actual end circumferential coordinate field, the actual local glue line arc length field, and the execution status field. For example, when the radius of the target local adhesive area is 22 mm, the actual starting circumferential coordinate field is 0.35 radians, and the actual ending circumferential coordinate field is 1.05 radians, the actual local adhesive line arc length field is 15.4 mm, and the local adhesive line execution record is used as the input of S530.

[0080] S530: First, read the local adhesive line execution record, target adhesive line parameters, and current outer surface result detection record, and then perform execution status verification, detection record integrity verification, and parameter deviation judgment in sequence before outputting the local adhesive line forming result record.

[0081] The current external surface result detection record refers to the detection record collected for local glue lines after the formal glue application is completed. It includes at least one or more of the following fields: detection image field, detection width field, and detection thickness field. After reading, first verify whether the execution status field in the local glue line execution record is in the completed state. When the execution status field is incomplete, it will no longer proceed to the pass / fail judgment, but will directly output the incomplete local adhesive line forming result record. For records with the execution status field incomplete, the completeness of the current outer surface result detection record will be checked again. If the detection image field is missing, the detection width field is empty, the detection thickness field is empty, or the detection boundary is discontinuous, the corresponding detection record will be deleted and will not participate in the subsequent deviation judgment.

[0082] After verification, the actual glue line length, actual glue line width, and actual glue line thickness fields are extracted. The actual glue line length field is preferentially derived from the actual local glue line arc length field in the local glue line execution record, while the actual glue line width and actual glue line thickness fields are directly provided from the current outer surface result detection record. Subsequently, the actual glue line length, actual glue line width, and actual glue line thickness fields are compared item by item with the target glue line length, target glue line width, and target glue line thickness fields; assuming... For a certain actual adhesive line parameter, To correspond to the target adhesive line parameters, For parameter deviation, then when If the deviation is not greater than the allowable deviation threshold corresponding to the parameter, the parameter is considered qualified. Preferably, the allowable deviation threshold for length can be set to 0.8 mm, the allowable deviation threshold for width can be set to 0.2 mm, and the allowable deviation threshold for thickness can be set to 0.1 mm. For example, when the target glue line width field is 1.6 mm and the actual glue line width field is 1.5 mm, the width deviation is 0.1 mm, which can be judged as qualified. Only when all three parameters—length, width, and thickness—are qualified will a qualified local glue line forming result record be output. When any parameter exceeds the allowable deviation threshold, an unqualified local glue line forming result record is output, and the out-of-tolerance type field is written into the record. The local glue line forming result record includes at least the result record number field, the actual glue line length field, the actual glue line width field, the actual glue line thickness field, the judgment result field, and the out-of-tolerance type field, which serves as the final output result of the local glue coating control method on the outer surface of the metal round part in this embodiment.

[0083] Example 2: Figure 2 As shown, this embodiment provides a control system for locally applying adhesive to the outer surface of a metal circular part, including: The system includes an image acquisition unit, a task data reading unit, a detection and execution unit, a timing analysis unit, a state inversion unit, a parameter solving unit, an execution control unit, and a result detection unit. The image acquisition unit and the task data reading unit are used to acquire the current outer surface image and process task data of the metal round part to be coated, and to determine the target local coating area, the status detection area and the target glue line parameters; The detection execution unit is used to release the detection glue dot in the state detection area, and the timing analysis unit is used to collect the detection dynamic image sequence of the detection glue dot within a preset sampling period, and perform timing analysis on the detection dynamic image sequence to output the dynamic morphology feature sequence. The state inversion unit is used to input the dynamic morphological feature sequence into the adhesive rheological state inversion model to obtain the current adhesive rheological state parameters. The parameter solving unit is used to obtain the formal adhesive application control parameters based on the current adhesive rheological state parameters, the target local adhesive application area and the target adhesive line parameters, and output the formal adhesive application control command. The execution control unit is connected to the dispensing assembly and the drive assembly, and is used to control the dispensing assembly and the drive assembly to perform local glue application on the target local glue application area according to the formal glue application control command. The result detection unit is used to acquire the local adhesive line execution record and the current outer surface result detection record, and output the local adhesive line forming result according to the target adhesive line parameters.

[0084] All the above formulas are performed using dimensionless numerical calculations; the relevant formulas are based on empirical models that approximate the real situation, obtained through extensive data collection and software simulation fitting. The preset parameters and thresholds involved in the formulas can be conventionally set and adjusted by those skilled in the art according to the physical constraints of the actual application scenario.

[0085] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0086] In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling localized adhesive application on the outer surface of a metal circular component, characterized in that, Includes the following steps: S1. Obtain the current outer surface image and process task data of the metal round part to be coated with glue, perform image correction and coordinate unification processing on the current outer surface image, and determine the target local coating area, state detection area and target glue line parameters. S2. Release the probe dots in the state detection area and continuously acquire the detection dynamic image sequence of the probe dots within a preset sampling period. Perform time-series analysis on the detection dynamic image sequence and output the dynamic morphology feature sequence, specifically including: Read the position data of the status detection area, the target glue line parameters and the current equipment parameter record, determine the preset glue amount to be detected, release the detection glue point in the status detection area, verify the initial forming state of the detection glue point, and output the initial state record of the detection glue point. Based on the initial state record of the detected glue dots, images of the detected glue dots are continuously acquired within a preset sampling period. Invalid frames are deleted, and a sequence of dynamic images of the detected glue dots is output in order of sampling time. Temporal image analysis is performed on the detection dynamic image sequence to extract the spreading length, edge expansion rate, necking rate, wire breakage delay and retraction displacement, abnormal morphology feature records are deleted, and dynamic morphology feature sequence is output. S3. Input the dynamic morphology feature sequence into the adhesive rheological state inversion model, obtain the adhesive rheological state parameters, verify the validity of the adhesive rheological state parameters, and output the current adhesive rheological state parameters, specifically including: Read the dynamic morphological feature sequence, product model identifier field and model parameter set record, verify the correspondence of the three, and statistically compress the dynamic morphological feature sequence to form an input feature vector. Calculate the candidate state score set based on the input feature vector. Read the candidate state score set and dynamic morphology feature sequence, determine the current preliminary selection state, calculate the spreading ability parameter, retraction sensitivity parameter, filament breakage delay parameter and line formation stability parameter, and output the adhesive rheological state parameter record; Read the rheological state parameter records and dynamic morphological feature sequences of the adhesive solution, perform range and consistency checks on the rheological state parameter records, delete invalid records, and output the current rheological state parameter records of the adhesive solution. S4. Read the current adhesive rheological state parameters, target local coating area and target adhesive line parameters, establish formal coating constraint relationships, obtain formal coating control parameters, verify the executability of formal coating control parameters, and output formal coating control instructions, specifically including: Read the current adhesive rheological state parameter record, target local adhesive application area location data, target adhesive line parameters and current equipment capacity record, verify each input object, and establish a formal adhesive application constraint record; Read the formal adhesive application constraint record and the basic process parameter record, and correct the basic process parameter record based on the current adhesive rheological state parameter record. Calculate the adhesive pressure, valve opening time, valve closing time, nozzle-outer surface distance, and metal circular part rotation speed to form the formal adhesive application control parameter record. Read the formal glue application control parameter record, current equipment capacity record, target glue line parameters, and target local glue application area location data. Perform range verification and logic verification on the formal glue application control parameter record, correct or delete records that do not meet the conditions, and output the formal glue application control command.

2. The method for controlling localized adhesive coating on the outer surface of a metal circular component according to claim 1, characterized in that, Also includes: S5. Based on the formal glue application control command, control the glue dispensing component and the drive component to apply local glue to the target local glue application area, obtain the local glue line execution result and the outer surface result detection record, and output the local glue line forming result according to the target glue line parameters.

3. The method for controlling localized adhesive coating on the outer surface of a metal circular component according to claim 1, characterized in that, S1 specifically includes: Read the current outer surface image and process task data of the metal round part to be coated with glue, delete invalid image records and invalid process task data records, and perform image correction and coordinate unification processing on the retained current outer surface image, and output the outer surface characterization image of the round part. Based on the surface characterization image of the circular part and the process task data, the outer contour boundary line, circumferential baseline and surface structure feature point set are extracted to determine the location data of the target local glue coating area. Based on the target local adhesive coating area location data and process task data, the status detection area is screened and verified, and the status detection area location data and target adhesive line parameters are generated.

4. The method for controlling localized adhesive coating on the outer surface of a metal circular component according to claim 1, characterized in that, S5 specifically includes: Read the formal glue application control command, target local glue application area location data and current equipment status record, perform start verification on each input object, control the glue dispensing component and drive component to enter the formal glue application preparation state, and output the formal glue application preparation ready record. Read the formal glue application preparation record, formal glue application control command, and target local glue application area position data; control the valve to perform opening, continuous glue dispensing, and closing actions; collect formal glue application execution feedback records; and output local glue line execution records.

5. The method for controlling localized adhesive coating on the outer surface of a metal circular component according to claim 4, characterized in that, Also includes: Read the local adhesive line execution record, target adhesive line parameters, and current outer surface result detection record; extract the actual adhesive line length, actual adhesive line width, and actual adhesive line thickness; determine the deviation; and output the local adhesive line forming result record.

6. A control system for locally applying adhesive to the outer surface of a metal round part, employing the control method for locally applying adhesive to the outer surface of a metal round part as described in any one of claims 1 to 5, characterized in that, It includes an image acquisition unit, a task data reading unit, a detection execution unit, a timing analysis unit, a state inversion unit, a parameter solving unit, an execution control unit, and a result detection unit.

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