A precision grinding process for machining the motor shaft of a swimming pool water pump

Abstract

This invention discloses a precision grinding process for machining the shaft of a swimming pool pump motor, relating to the field of shaft precision grinding technology. The process includes: Step 1: Establishing an incident window using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone, first wetting and then introducing the load, and recording the incident window, jet posture, and dressing rhythm as working condition metadata; Step 2: After precision grinding, according to the material type, magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress, and combining this with cleanliness to generate a surface integrity label and bind it to the working condition metadata; Step 3: Performing deionized ultrasonic cleaning and rinsing according to the label to remove chloride salts and free iron, rebuilding the passivation film according to specifications using chemical passivation, controlled drying, and clean sealing; Step 4: Under the premise of qualified chemical condition, performing isotropic ultra-finishing and low-plasticity rolling on the sealed working zone to form surface compressive stress and maintain geometric tolerances, quickly indicating inspection and writing back the label.

Description

Technical Field

[0001] This invention relates to the field of shaft precision grinding technology, specifically a precision grinding process for machining the shaft of a swimming pool water pump motor. Background Technology

[0002] Swimming pool pump motor shafts operate in environments with chlorinated circulating water, air bubbles, and frequent start-stop cycles. The sealing working zone must balance low friction, corrosion resistance, and strict geometric tolerances. Current fine grinding methods often employ flooded liquid supply and experience-based load introduction. Nozzle orientation is not synchronized with the dressing rhythm, the injection window lacks a clear definition, and the jet is prone to instability within narrow air gaps. Wetting often occurs later than the load, resulting in smearing and heat peaks. Post-grinding quality assessment is fragmented using single signals; while magnetic noise or X-ray diffraction is used, it is not tied to the operational context. Cleaning and passivation rely on experience, with fluctuations in chemical dosage and rinsing sequence, easily leading to insufficient decontamination or excessive corrosion. Subsequent polishing or heavy rolling may damage the passivation film and introduce directional textures and geometric drift. Data is fragmented across workstations, lacking a traceability chain based on operational metadata and surface integrity tags.

[0003] The lack of a manufacturing digital thread that uses operational metadata as the sole source and is interconnected by surface integrity tags without adding new online adjustment items makes it impossible to synchronize the incident window, jet attitude, and dressing rhythm of coherent jets; wettability-first and load soft-start and thermal convection traction; material classification detection and cleanliness confirmation; minimal cleaning and fixed-path passivation; and isotropic ultrafinishing and low-plasticity rolling into a verifiable and auditable continuous sequence. This problem is particularly prominent in scenarios with high linear velocity, narrow air gaps, and frequent grinding wheel dressing: when the liquid supply is insufficiently coherent or the phase is asynchronous, the air gap air barrier causes wettability failure; when cleaning is incomplete or the film is not stable, micro-crack retention and interfacial energy fluctuations persist; when finishing introduces directional textures and superimposed residual tensile stress, it ultimately induces underfilm corrosion, pitting, and leakage under the coupled conditions of chlorinated water, cavitation microjets, and thermal cycling, leading to increased energy consumption and noise, increased maintenance frequency, and unreproducible batch-to-batch quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a precision grinding process for machining the shaft of a swimming pool pump motor. An incident window is established using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone. The jet is first wetted and then subjected to load. The incident window, jet posture, and dressing rhythm are recorded as operating condition metadata. After precision grinding, the material is classified: magnetic noise is used for ferromagnetic steel, and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress. A surface integrity label is generated based on cleanliness and bound to the operating condition metadata. Deionized ultrasonic cleaning and rinsing are performed according to the label to remove chloride salts and free iron. A passivation film is rebuilt using chemical passivation according to specifications. The material is then dried in a controlled manner and sealed cleanly. Under the premise of acceptable chemical condition, isotropic ultra-finishing and low-plasticity rolling are performed on the sealed working zone to form surface compressive stress while maintaining geometric tolerances. Rapid inspection and label writing are then performed. This process solves the technical problems described in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a precision grinding process for machining the shaft of a swimming pool water pump motor, wherein an incident window is established using a coherent jet nozzle, allowing the jet to penetrate the air gap to the grinding area, first wetting and then introducing the load; maintaining the jet posture and trimming rhythm consistent; and recording the incident window, jet posture, and trimming rhythm as operating condition metadata.

[0008] After fine grinding, thermal damage indicators and residual stress are collected according to material type. Magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel. Cleanliness is also confirmed. The thermal damage indicators, residual stress, and cleanliness are integrated into a surface integrity tag and bound to the operating condition metadata.

[0009] According to the surface integrity label, perform deionized ultrasonic cleaning and rinsing to remove chloride salts and free iron, perform chemical passivation to rebuild the passivation film according to specifications, dry in a controlled manner and seal cleanly; write the chemical status qualification information back to the surface integrity label;

[0010] Under the premise that the chemical state is qualified, the sealing working strip is subjected to isotropic superfinishing to weaken the directionality, and then low plasticity rolling is used to form surface compressive stress while maintaining tolerance; rapid indication inspection is used to confirm release, and the results are written into the surface integrity label.

[0011] Furthermore, the geometry, opening size, and tilt angle of the incident window are set according to a preset configuration set; the injection attitude is described by pitch angle, yaw angle, and roll angle and synchronized with the dressing rhythm; the three items are collected to generate a unique working condition metadata entry, associated with the nozzle model, air gap size, and grinding wheel specification index, and used as a read-only reference in subsequent steps, and a timestamp field is recorded to achieve cross-process timing alignment and consistency verification requirements.

[0012] Furthermore, a coherence penetration criterion is established, and a coherence threshold and a penetration margin threshold are set. The thresholds are determined by an offline calibration set. When both the coherence and penetration margin meet the thresholds, a soft start of the load is initiated. The load time history is synchronized with the trimming rhythm, and no new online adjustment items are added. The load start time is determined by a wetting threshold and a liquid supply temperature reference. The threshold and reference are derived from the operating condition metadata and are fixed in the batch configuration file.

[0013] Furthermore, the tests were conducted according to the material type. For ferromagnetic steel, magnetic noise signals were collected and wavelet energy calculations were performed immediately after grinding. For austenitic steel, residual stress projections were obtained using multi-angle X-ray diffraction.

[0014] Cleanliness is confirmed by using the image skeleton penetration rate, conductivity, and colorimetric readings, and the data is fielded. The acquisition trajectory is consistent with the sealed working belt, and the sampling frequency and tilt range are fixed according to the work instructions. Equipment calibration records are archived with each batch.

[0015] Furthermore, the thermal damage indication, residual stress projection or anisotropic residual work, cleanliness confirmation result, average coherence, average wetting, and penetration margin are integrated to generate a surface integrity label. The label contains a chemically ready field and a binding identifier, and corresponds one-to-one with the operating condition metadata in an irreversible mapping. At the same time, the structural order and version number of the label fields are specified as the unique input for subsequent steps.

[0016] Furthermore, the ultrasonic energy flux and the action time are mapped based on the index vector in the surface integrity label, with the constraint that the microfluidic shear does not exceed the membrane protection threshold.

[0017] Ion parameters were measured using deionization rinsing. If the removal of free iron was insufficient, the minimum complexation assistance was activated. After completion, the chemical state was updated to the label. The upper and lower limits of ultrasonic energy flux were fixed according to the equipment limits. The time history was generated using a soft-start function, and the energy flux and shear estimation trajectory were recorded.

[0018] Furthermore, chemical passivation is performed under a fixed chemical path, which includes a preset combination of pH, temperature, time window, and rinsing sequence. After passivation, film thickness, chromium enrichment, surface free energy, and contact angle are measured and combined with ion removal degree to form a chemical state vector. Subsequently, controlled drying and clean sealing are performed according to particle concentration and water activity threshold, and the chemical state is written back to the surface integrity tag to generate a chemical binding identifier.

[0019] Furthermore, under the premise that the chemical state is qualified, isotropic superfinishing is carried out on the sealed working zone, limiting the anisotropic index to reach the preset threshold, the cumulative material removal does not exceed the removal budget, and the upper limit is applied to the contact shear energy density by the membrane protection functional.

[0020] The ultra-fine finishing domain is consistent with the aforementioned cleanliness and chemical state measurement domains, while setting an upper limit for curvature energy change and integrating it using the same spatial mask.

[0021] Furthermore, the soft-start time history of the rolling load is generated using the anisotropic residual work and thermal damage indication in the surface integrity label, and the contact radius and average pressure are calculated based on the Hertzian contact to obtain the surface compressive stress amplitude and depth scale.

[0022] The rolling process ends under geometric drift and profile preservation constraints, and the relevant parameters are written into the label. The final values ​​of the maximum tensile stress, anisotropy index and retention tendency are recorded as input fields for subsequent judgment and traceability.

[0023] Furthermore, a read-only calibration set is established to store thresholds, weights, kernel scales, rate constants, and geometric budgets. This calibration set is generated from offline experiments and fitting. The mapping function, decision conditions, and write-back fields are read only from the surface integrity label and the calibration set. Online modification access is not provided. The version number, generation time, and applicable material range are written into the batch configuration for consistency verification.

[0024] (III) Beneficial Effects

[0025] This invention provides a precision grinding process for machining the shaft of a swimming pool water pump motor, which has the following beneficial effects:

[0026] In terms of coherent liquid supply and heat load guidance, the three-dimensional unique mapping of the incident window, spray posture and trimming rhythm, wetting before load introduction reduces smearing and heat peaks, forms a stable liquid film and establishes traceable operating condition metadata, avoids additional adjustment items, improves stability and reproducibility, and solidifies wetting first and load soft start into recalcible rules, thereby reducing batch-to-batch fluctuations caused by operational differences.

[0027] In terms of surface integrity labeling, based on material classification, magnetic noise energy spectrum is used for ferromagnetic steel and X-ray diffraction anisotropic projection is used for austenitic steel. Combined with cleanliness confirmation, a unique surface integrity label is formed and bound to the operating condition metadata, reducing subjective judgment and shortening the diagnostic path. The historical context of coherent liquid supply and temperature rise is embedded in the label, making the interpretation of thermal damage and residual stress more certain.

[0028] In terms of pollution-minimizing cleaning, the ultrasonic energy flux and microfluidic shear are determined based on the surface integrity label. Chloride salts and free iron are removed preferentially without adding chemical agents. Complexation is only used as an auxiliary agent when necessary. The probability of recontamination is reduced through controlled rinsing, controlled drying and clean storage. This reduces the risk of subsequent passivation failure and under-film corrosion from the source, avoids micro-erosion caused by over-cleaning, and provides a clean and stable interface for film growth.

[0029] In terms of field-coupled growth for chemical passivation, the passivation film is reconstructed under a fixed chemical path, and the film thickness, chromium enrichment and surface free energy are synergistically optimized to avoid the non-reproducibility of empirical formulations. The chemical state that can be released is output and written back to the same label, so that the mechanical state and chemical state are managed in a closed loop under the same label. The unified quality criteria give the boundary and ensure the comparability and consistent release of different production lines.

[0030] In terms of functional finishing and compressive stress reengineering, isotropic superfinishing is implemented under the premise of qualified chemical state to reduce the tendency of directional grooves and micro-cracks to remain. At the same time, low plasticity rolling is used to convert residual tensile stress into surface compressive stress within the boundary without breaking the film and control geometric drift. Corrosion-resistant readiness is confirmed by rapid indication inspection, forming a dual gain of corrosion resistance and fatigue resistance. Moreover, the load and contact dimensions are automatically generated according to the label constraint to avoid secondary damage caused by empirical pressure. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the precision grinding process for machining the motor shaft of the swimming pool water pump of the present invention. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1 This invention provides a precision grinding process for machining the shaft of a swimming pool water pump motor, comprising:

[0034] Step 1: Under the constraint of the three-dimensional non-incremental terms of incident window, jet attitude, and trimming rhythm, first establish stable wetting and then guide the heat load to achieve the desired coherence index. With wetting and filling rate Synergistic maintenance will ultimately integrate the ternary and its derivative ecosystems into operational data metadata. Record and solidify.

[0035] In precision grinding of motor shaft materials, it is necessary to both suppress smearing and limit instantaneous heat peaks. If the jet becomes unstable at the air gap or does not re-adhere sufficiently at the grinding zone boundary, the smearing tendency and the risk of thermal damage will increase resonantly. Therefore, using the incident window parameter vector... The geometry and scale, combined with the jet attitude parameter vector To ensure directional consistency, construct a single chain that penetrates, wets, and carries; then adjust the rhythm. The coherence index of the jet Locked within the rhythmic window of the wheel surface micro-geometry update, this provides a physical basis for allowing wetting to precede heat load.

[0036] With the incident window parameter vector Constraint window function and in the jet attitude parameter vector Rotation mapping Align the jet direction so that the jet exits the air gap at the outlet section. Projected onto the air gap inlet The momentum flux remains highly correlated. Define a coherence index. For the weighted correlation functional:

[0037]

[0038] Where: coherence index : A dimensionless index of coherent penetration intensity; the range is To evaluate the merits of the incident window and pose configuration; incident window parameter vector. Define the shape, size, and tilt angle of the incident window, which is a real vector within the design domain, and generate the window function;

[0039] Window functions : A nonnegative weighting function defined on the exit section; the interval is Highlight the main energy band within the window; the window function uses a Gaussian type.

[0040]

[0041] The center With covariance Offline calibration based on incident window geometry, effective nozzle diameter, and air gap magnification; injection attitude parameter vector. Define the nozzle's pitch / yaw / roll angles as the SO(3) parameterization domain, and determine the rotation mapping; rotation mapping The rotation matrix from nozzle coordinates to wheel surface coordinates is an orthogonal matrix group, with the velocity vector aligned, and is decomposed using Euler angles. And it is agreed that the angle order is unique;

[0042] Nozzle outlet integral domain A rectangular or elliptical planar region coinciding with the nozzle opening; the integration region at the bottom of the air gap. The corresponding plane located on the outer circumferential surface of the grinding wheel; here , It is a position vector; It is a two-dimensional integral area infinitesimal element;

[0043] Exit velocity field The velocity distribution at the nozzle exit section is a vector field, providing information on the incident momentum; the velocity field at the air gap inlet... The velocity distribution at the air gap inlet is a vector field, representing the velocity state after penetration;

[0044] Kernel function Characterization from arrive Spatial transfer, a non-negative integrable function, characterizes the diffusion and convergence of the jet within the air gap. The kernel function uses an isotropic Gaussian kernel. ,scale The distance is determined by the nozzle outlet characteristic width and the air gap distance. This dual integral can be achieved by discretizing and summing over the measurement grid, with numerically stable minimum regularization added if necessary.

[0045] To characterize the resultant force boundary between penetration capability, surface tension, and back pressure, a penetration margin is defined. :

[0046]

[0047] Where: Penetration margin : Area integral of effective penetration;

[0048] Injection pressure The static pressure inside the nozzle cavity is a positive real number, taken from the nozzle cavity pressure sensor; the back pressure field... The environmental pressure distribution at the air gap inlet is a real function representing the reverse resistance, obtained using the micro-pressure hole array at the air gap inlet; the interface curvature term is obtained by reflectivity threshold segmentation + sub-pixel contour fitting.

[0049] Surface tension : Interfacial tension of the process fluid, characterizing the energy barrier for fluid bridge formation; curvature function Local interface curvature, a real function, transforms interface tension into a pressure penalty term, estimated by the second derivative of the interface profile; The average hyperbola at the hypothetical liquid film interface is obtained using high-frequency reflectivity imaging or a confocal displacement sensor; positive values ​​represent convexity towards air. Positive part operator. Take the non-negative part;

[0050] In the processing, first use the incident window parameter vector Adjust the window function, and then use the jet attitude parameter vector. Alignment Rotation Map This makes the coherence index Reaching the threshold And thus the penetration margin Exceeding the threshold Ultimately, without altering other process handles, a stable inlet state with penetration and wetting preceding the inlet state is established.

[0051] When using, the coherence index Improvement and penetration margin The positive combination significantly reduces random dispersion in the air gap, allowing the liquid entering the grinding zone to form a continuous film near the sealed working zone, thus simultaneously weakening the smearing tendency and local heat peaks.

[0052] Transmit the jet attitude parameter vector With repair rhythm Weaving is used as a unified time reference, and phase drift is suppressed by synchronous functionals to improve the time-varying coherence index. During a rest period Maintaining a high value internally, defining the synchronization cost functional. :

[0053]

[0054]

[0055]

[0056] Where: Synchronization cost functional : The combined cost of coherence attenuation and phase error is represented by a non-negative real number, serving as an evaluation metric for attitude configuration; time-varying coherence index : Coherent indices that vary with the micro-geometry update of the wheel surface; the range is This reflects the instantaneous wetting coupling level; As the starting point for observation, To adjust the rhythm cycle; weighting coefficient Phase penalty weight, a positive real number; phase difference The difference between the jet attitude phase and the correction phase measures the degree of synchronization.

[0057] Attitude phase : Fixed phase determined by the injection attitude parameter vector, given an injection reference; phase adjustment Phase evolution caused by rhythm correction provides a rhythm baseline; rhythm correction : Adjust the angular velocity or equivalent frequency, which is a positive real number, and determine it. The slope;

[0058] initial phase Adjust the initial phase to a real number, and close the time base. Lower time limit. ,cycle The time window is a real number, defining the integration domain. The weights / thresholds can be derived from small-sample experimental designs combined with minimizing guided functional calibration.

[0059] In terms of processing, the functional that minimizes the synchronization cost is used. The attitude selection rule is used to inversely calculate the jet attitude parameter vector. With the incident window parameter vector Compatible combinations; therefore, time-varying coherence index The low point is covered by the high-energy time slot of the trimming phase, thus aligning the location and time window direction of the most needed wetting with the main ridge line, thereby maintaining a stable state of high coherence and low phase difference throughout the trimming cycle. In use, after synchronization, the relative configuration of the wheel surface groove and the liquid momentum ridge line is stable, the coating changes from intermittent to a controllable and negligible state, and the subsequent heat load guidance becomes predictable.

[0060] Even if the incident coherence is stable, if the cutting load is instantaneously applied, a heat peak may still be induced before the wetting is closed; the wetting saturation rate should be considered. Define the cutting load function as a gated variable. Soft start, and utilize wetting mask in the heat conduction equation. By directing the heat flow to the convection heat exchange channel, the heat load can be calculably guided.

[0061] Using time-varying coherence index With volumetric flow rate Effective cross section of the air gap The ratio of [value] to establish the wetting fill ratio. A collaborative growth model was proposed, and the cutting load function was controlled by a gate function. Entry timing:

[0062]

[0063] Where: wetting fill rate Volume fraction of wetting in the grinding zone; range: Gated thermal load, thin-layer impedance electrode or optical reflectivity microarray (monochrome LED + linear array camera) is set in the grinding zone to map reflectivity / impedance to instantaneous wetting volume fraction (read online only after offline calibration).

[0064] Coupling coefficient : The filling efficiency coefficient of coherent drive, a positive real number, maps coherent flow to filling speed; coupling coefficient The dewetting coefficient carried away by cutting is a non-negative real number, characterizing the erosion of the film by shear; time-varying coherence index. : Definition as before; interval is Enhance and enrich growth items.

[0065] Volumetric flow rate The volumetric flow of the jet is a positive real number, indicating a strong liquid supply source; the effective cross-section... The effective flow area of ​​the air gap is a positive real number, converting flow rate into average velocity; cutting speed. The relative circumferential velocity between the workpiece and the grinding wheel is a positive real number that characterizes the shear strength.

[0066] Based on this, define the smooth gate function and the soft start load:

[0067]

[0068] Where: gate function Map the wetting threshold to access permissions; the range is... Ensure wetting first; threshold : Wetting readiness lower bound, a constant within the interval, determines when the gate opens; smoothing coefficient : Gate function steepness, a positive real number, controls the sensitivity of the gate;

[0069] Load function The increasing amplitude of the cutting load over time influences the intensity of the heat source; maximum load. The upper limit of the allowable load of the process, which is a positive real number and limits the amplitude;

[0070] slope parameter : Soft-start ramp rate, a positive real number, controls the import speed. Start time : Soft start reference time, a real number, aligned with wet-ready time;

[0071] At the same time, thermal budget constraints are stipulated to suppress heat buildup during the unwetting period:

[0072]

[0073] Where: Frictional heat flux Heat input per unit time is a non-negative real function that measures the intensity of a heat source.

[0074] Safety thermal budget The allowable cumulative heat during the unwetting stage is a positive real number, limiting the risk of heat peaks. Lower time limit. Time variables : Time domain parameters, which are real numbers, the upper and lower limits of integration, and the independent variable.

[0075] In terms of treatment, first determine the wetting and filling rate. The differential equation yields the wetting readiness time (from...) Implicit definition), followed by gate function Open the load channel and use the soft start function. This allows the heat source to gradually penetrate, thus solidifying the physical constraint of wetting first into a control law that makes the load visible. During use, the heat input during the unwetting stage is strictly limited within the thermal budget constraint, and the coupling channel between application and thermal damage is actively cut off.

[0076] Under the traction of the wetting mask, the heat source density is... Spatial-temporal distribution and load function Associating with the convective boundary to constrain the peak temperature rise, we define the heat conduction-convection coupling equation:

[0077]

[0078] Where: density - specific heat product : Material heat storage parameters, positive real numbers, characterizing temperature rise inertia; thermal conductivity : The material's heat transfer capacity, a positive real number, representing the dissipation of heat; temperature field. : Grinding zone temperature, constrained object, effective temperature rise peak reconstructed using infrared micro-area temperature measurement + inverse problem correction;

[0079] Convection coefficient : Convective heat transfer intensity, a non-negative real number, reflecting the heat-carrying capacity of the fluid; wetting mask : A spatial mask generated by wetting filling rate, an indicator value between 0 and 1; M=1 when the local liquid film is closed, and M=0 in the dry region; mapped online by impedance or reflectivity threshold; the interval is Focusing the convective phase onto the already wetted area; jet temperature : Supply liquid temperature, a real number, convective thermal reference; heat source density Heat is injected into the body by a heat source driven by a load function.

[0080] To ensure a unique mapping of heat load guidance to the coherence-wetting-load ternary model, a guiding functional is constructed and minimized with fixed calibration weights:

[0081]

[0082] In the formula: guiding functional The unified cost of heat-wetting-coherence is a non-negative real number, used for offline calibration and not as an online adjustment term; weight. Fixed calibration weights, which are non-negative real numbers, to balance the influence of the three factors; time window. : Defined as before, aligned with the trimming period; temperature gradient norm Spatial uniformity measure, a non-negative real number, used to suppress hot spots; coherence index. : Defined as before, penalizing coherence decay. Volumetric flow rate : Defined as before, constrains invalid traffic consumption.

[0083] At the same time, an upper limit constraint on temperature rise is given:

[0084]

[0085] Where: Upper limit of temperature rise The material's allowable temperature upper bound is a positive real number, serving as a hard constraint for passage; spatial domain. : Grinding contact area, which is a region where the location of the maximum value is constrained.

[0086] In terms of processing, a convection traction channel is first established using coherence and wetting to wet the mask. Localize the convection term, and then use the load function Through heat source density Smoothly injecting heat, ultimately guiding the functional Under a fixed calibration, let the temperature field The peak value is controlled within the upper bound. During use, heat flow is preferentially discharged from the wetted area, and the temperature gradient norm... The temperature is reduced, local thermal peaks are suppressed without sacrificing geometric tolerance stability.

[0087] Step 2: Starting with material classification gating, based on the working condition metadata... Based on the spatiotemporal context, thermal damage indicators and residual stress states are constructed and combined with cleanliness scores to ultimately generate surface integrity labels. and working condition metadata One-to-one binding.

[0088] The dynamic boundaries of coherent liquid supply and heat load guidance have been given in the previous step. However, the magnetic differences between materials determine that the physical paths of observable quantities are different; the domain pinning of ferromagnetic steel is particularly sensitive to thermal damage, while austenitic steel has no magnetic domain response, but its lattice stress anisotropy is highly sensitive to heat input and shear processes. Therefore, it is necessary to strictly separate the two channels using material indicator variables to determine the coherence index. Wetting and filling rate With temperature field The historical influence is projected as a magnetic noise energy spectrum criterion for ferromagnetic steel and anisotropic X-ray diffraction mapping for austenitic steel, and then the thermal damage indicator is constructed under a unified thermal threshold constraint.

[0089] After fine grinding, the magnetic domain structure of ferromagnetic steel is extremely sensitive to the short-term accumulation of thermal peaks, and the magnetic noise envelope can be used as a non-destructive probe. Wavelet domain energy moments are constructed using the magnetic noise time series, and the coherence index is... Wetting and filling rate The masking effect of the temperature field peak is incorporated into the normalization factor to ensure that the thermal damage indicator maintains a single-chain memory of the wetting-heat load relationship from the previous step. First, the magnetic noise wavelet energy moment is defined:

[0090]

[0091] Where: wavelet energy moment The weighted energy of magnetic noise in the scale-time plane is a non-negative real number, used to extract the energy density features of domain wall transitions; wavelet transform. The wavelet coefficients of the magnetic noise signal are complex functions representing instantaneous energy at different scales. Wavelet scale, lower bound of the scale Upper bound of scale : Effective scale range, a positive real number, defining a scale domain that matches the domain wall size; Time starting point Time window width The data acquisition window contains real and positive real numbers, covering the immediate post-grinding interval; the order parameter... Energy moment weighting index, a positive real number, emphasizes the contribution of high-energy or low-energy scales.

[0092] The historical definitions of coherence and wetting define mean coherence and mean wetting:

[0093]

[0094] Where: average coherence : Coherent average over a trimming period; the interval is Characterizing inlet coherence stability; average wetting : Average wetting over a trimming cycle; range is Characterizes convective traction capacity; trimming cycle : Time window length, a positive real number, aligned with the rhythm; Time start point : Lower bound of integration, a real number, defining the starting point; coherence index Wetting and filling rate Define the continuation step one; the interval is... As a historical gatekeeper.

[0095] Peak temperature rise is defined as:

[0096]

[0097] Where: peak temperature rise The peak increase relative to the supply liquid temperature is a non-negative real number, quantifying the thermal risk; spatial domain. The grinding contact area is a region, and the search area is maximized.

[0098] Temperature field : Continuing from step one, it is a real function, a thermal state variable; liquid supply temperature Continuing from step one, the value is a real number, representing the convection reference temperature. Time window. Consistent with the above formula, using a unified time reference.

[0099] Based on this, an indicator of thermal damage to ferromagnetic steel is constructed:

[0100]

[0101] Where: thermal damage indicator of ferromagnetic steel A dimensionless index sensitive to thermal peaks and compensatory wetting, a positive real number, representing the unique quantification of thermal damage along the ferromagnetic steel path; weighting coefficient. Weighting coefficients The suppression weights of coherence and wetting are non-negative real numbers, reflecting the buffering effect of wetting-coherence on thermal risks; the exponential coefficient... Temperature rise amplification factor, a positive real number, highlighting the influence of the heat peak; upper limit of temperature rise. : Continuing from step one, it is a positive real number, with a normalized upper limit.

[0102] In use, the thermal damage indication of ferromagnetic steel is obtained through the triple coupling of wavelet energy moment and coherence-wetting-temperature rise. It is extremely sensitive to the coupling between domain wall pinning release and thermal trajectory, and can accurately reflect thermal risks even under extreme conditions of insufficient wetting but still good coherence.

[0103] Since austenitic steel lacks stable magnetic domains, X-ray diffraction is used to trace the stress projection of the lattice moment at different tilt angles, and an anisotropic residual work functional is constructed to mechanically represent the heat input and shear history in the residual stress tensor, defining the directional normal stress. With residual work in all directions :

[0104]

[0105] Where: Direction: Normal stress : Stress projection along the tilt direction, projecting the tensor onto the angular direction; direction unit vector : The unit vector generated by the tilt angle is a unit vector, and a projection basis is established; residual stress tensor The residual stress state after grinding is a symmetric second-order tensor that records the mechanical history.

[0106] Residual work in all directions The weighted integral over the positive part of the tensile stress is a non-negative real number, highlighting the potential cracking driving force; weighting function Tilt distribution weights are non-negative and integrable functions; the corrected angle measurement density is the product of Lambert cosine correction and exposure time normalization; tilt domain. : The set of measured angles, which is the angle interval and the integration range;

[0107] Under the same thermal threshold constraint, construct the thermal damage indicator of austenitic steel. :

[0108]

[0109] Where: thermal damage indicator of austenitic steel Quantification of thermal damage driven by anisotropic stress, a positive real number, the unique thermal damage quantity along the austenite path; exponential parameter. Nonlinear amplification index, with an interval of ;

[0110] Magnification factor Temperature rise coupling weight, a positive real number, characterizing the thermo-stress synergy; peak temperature rise. Upper limit of temperature rise : Defined as before, normalized thermal intensity;

[0111] Use material indicator variables to unify thermal damage indicators :

[0112]

[0113] Where: thermal damage indicator : The uniform thermal damage after material classification, a positive real number, representing the thermal dimension of subsequent tag fusion; material indicator variable. : Ferromagnetic steel indicating quantity, The system uses two gated paths, based on a dual criterion of chemical composition spectrum and rapid detection of magnetization response: when Fe-based and Setting threshold + when significant hysteresis curve is established Otherwise, it is 0; this criterion is fixed offline as a Boolean logic configuration and cannot be changed online.

[0114] In use, the thermal damage indicator of austenitic steel is obtained through the synergy of residual work in all directions and temperature rise. It can embed the combined driving forces of shear and heat into a functional with a clear energy meaning, and thus unify the expression with the ferromagnetic path. Smooth flow converges.

[0115] Thermal damage and residual stress alone cannot determine the processing state that can be transferred to chemical steps. Coating and residue can alter the electrochemically active interface through micro-seam retention, thus introducing uncontrollable boundary effects during cleaning and passivation. Therefore, it is necessary to combine image penetration rate, ionic contamination, and free iron signals with the aforementioned thermo-mechanical indicators to form a single tag, and use a geometric-energy decision boundary to determine chemical readiness. Finally, the tag and operating condition metadata should be integrated. One-to-one binding.

[0116] Microscopic images of the sealed working zone were acquired, and a skeleton-like penetration rate was constructed to distinguish between real material texture and coated bridging. Simultaneously, conductivity and colorimetric analysis were performed on the rinsing solution to quantify chloride and free iron residues. A chemical spectrum integration was then introduced to form a unified cleanliness score. Geometric penetration rate and ion / free iron indices were defined.

[0117]

[0118] Where: penetration rate : The ratio of the length of the bridging frame to the baseline span; the interval is Calculated from morphological skeleton + minimum span diagram; bridging length : Length of the skeleton's through path, a non-negative real number, quantified by the area covered by the smear; baseline span. The minimum span of the region is a positive real number and represents the normalized scale.

[0119] Chloride index Rinse conductivity increment normalized index, a non-negative real number, characterizing chloride residue, taken as the online conductivity reading at the end of rinsing (compared to the DI water baseline); Rinse conductivity Deionization conductivity Conductivity measurement, a positive real number. Free iron index. : Colorimetric absorbance ratio, a non-negative real number, characterizing residual free iron, obtained using the o-phenanthroline colorimetric standard peak; Target wavelength absorbance Reference absorbance The output of the spectrophotometer is a non-negative real number, which is the colorimetric normalization.

[0120] Introducing chemical spectrum integration and constructing a cleanliness score:

[0121]

[0122] Where: Cleanliness score Dimensionless score for geometric-chemical composites; interval is Combining smear bridging and trace contamination into a single scale; weighting Fixed calibration weights are real numbers; after offline calibration, they are fixed as constants and are not used as online adjustment terms; chemical spectrum integrals. : Surface peak integral, a non-negative real number, supplementing trace information of organic / inorganic residues, derived from the peak integral of surface ATR-FTIR (trace amounts of organic residues / surfactants); Sigmoid function Smoothing compression mapping, which compresses linear combinations into a probabilistic sample scale.

[0123] When used, the combination of geometric penetration and trace chemical treatment improves the cleanliness score. It is simultaneously sensitive to two types of false negatives: bridging with low ion residue and high ion residue with insufficient bridging, significantly improving the ability to predict the risk of subsequent passivation failure.

[0124] To avoid adding new parameter tuning items, a compliance domain definition with fixed quadratic form and threshold is adopted. Thermal damage indicator, anisotropic residual work, cleanliness score and coherence-wetting-penetration ecological link are linked into vectors. Then, chemical readiness judgment is given by directed distance, and the judgment and original vector are bound to the operating condition metadata one by one by irreversible mapping.

[0125] Define the index vector, quadratic distance, and readiness criteria:

[0126]

[0127] Where: index vector The state vectors of thermal-mechanical-cleanliness and coherence-wetting-penetration are integrated and are real vectors.

[0128] Quadratic matrix : A symmetric positive semi-definite matrix, where is a matrix, and energy-type distance is defined. It can be solved offline by fitting the maximum margin of defect-free samples and constraining the minimum cost of slightly defective samples; threshold Release threshold, a positive real number, defines the compliance domain and can be selected based on the principle of minimum misrelease in chemical release; directed distance. : The signed distance to the boundary of the compliance domain, which is a real number; chemically ready state Binary determination, for The only gating factor for whether a chemical step can be initiated; thermal damage indicator. Residual work in all directions Cleanliness score Definition as before; average coherence Average wetting Penetration margin : Continuing from step one, for actual quantity, transfer fluid-heat inlet state.

[0129] To achieve one-to-one binding and non-repudiation, define binding identifiers and tags:

[0130]

[0131] In the formula: binding identifier The unique key obtained by the irreversible mapping is a string or a large integer, which injectively binds the tag to the working condition metadata; irreversible mapping A fixed hash function is used to ensure the uniqueness and traceability of the bindings. Collision-resistant irreversible digest algorithms should be employed, and the input bytes should be concatenated in a fixed order. Surface integrity tags. : This is a structure, the only input for subsequent steps.

[0132] When in use, a quadratic energy distance and irreversible binding are adopted, which not only ensures that the judgment is interpretable and traceable, but also ensures that no new handles for online parameter tuning are introduced; the coherent-wetting-penetrating ecology contained in the tag enables subsequent chemical processing to achieve parameter decoupling-free transfer based on the real inlet state.

[0133] Step 3: Under the constraint of using only the surface integrity label as input, complete the deionized ultrasonic cleaning and rinsing, minimize the removal of chloride salts and free iron, perform calculable growth of chemical passivation according to specifications, and controllable drying and clean storage, and write the qualified chemical status back to the surface integrity label.

[0134] thermal damage indicator in the label Residual work in all directions Cleanliness score These factors collectively determine the morphology of the contaminant, its adsorption strength, and the distribution of potential chemically active sites; if cleaning is performed directly with a fixed ultrasonic power, it may result in high... Secondary microcracks induced in the area or in low This leads to unnecessary material erosion in the area. Therefore, it is necessary to adjust the index vector. The projection is the coupled time history of ultrasonic energy flux-microfluidic shearing-ion migration, which removes chloride salts and free iron to the maximum extent without adding chemical agents, and activates ultra-low dose complexation assistance only when iron residue exceeds the threshold;

[0135] First, using indicator vectors Mapping the pollution intensity scalar, and then generating the ultrasonic energy flux time history and constraining the microfluidic shear to prevent it from going out of bounds:

[0136]

[0137]

[0138] Where: pollution intensity scalar The pollution load metric derived from the label is a real number that determines the energy level range; the weight vector... The fixed coefficients calibrated offline are real vectors, and the index vectors are... The projection is a scalar; the bias is a scalar. : Fixed bias, a real number, used for zero-point calibration;

[0139] Ultrasonic energy flux Acoustic energy input per unit area over time determines cavitation and microfluidic intensity; minimum / maximum energy flux. Device limits, positive real numbers, define safe operating ranges; Sigmoid function. Smooth activation mapping, for Suppress mutations; steepness coefficient : Enable sensitivity, a positive real number, controls the response slope; baseline threshold : Pollution intensity benchmark, a real number, distinguishing between light and severe pollution; rising slope The soft-start slope of the energy flux is a positive real number to avoid transient impacts.

[0140] To limit mechanical action, a unified constraint functional for microfluidic shearing and energy cost is proposed. :

[0141]

[0142] Where: cost functional The combined cost of energy consumption and shear safety is a non-negative real number, used to verify the compliance of energy flux shaping; cleaning time. : Total duration of ultrasound treatment, a positive real number, upper limit of integration; weight Offline weighting is assigned as a non-negative real number to balance the costs of the two components.

[0143] Microfluidic shearing Surface shear induced by acoustic microfluidics is a non-negative real function that drives boundary layer refresh; shear reference. : Lower limit of material safety shear, a positive real number, to avoid overshearing; Coupling coefficient : The energy-to-shear conversion coefficient, a positive real number, connecting two physical quantities.

[0144] Therefore, given the index vector The ultrasonic energy flux can be uniquely determined. And verify the cost functional Without exceeding the limits, a deterministic cleaning trajectory constrained by both energy flux and shear is achieved without additional parameter tuning. Cavitation intensity and microfluidic shear are confined to the open but not destructive region, reducing microscopic erosion of the sealed working zone while ensuring continuous boundary layer refresh to facilitate contaminant desorption.

[0145] After determining the energy flux, the convection-diffusion-desorption synthesis kinetics of chloride salts and free iron were described using an equivalent removal rate matrix, and extremely low-dose complexation assistance was activated only when iron removal was insufficient.

[0146]

[0147] Where: ion concentration vector : The concentrations of chloride salts and free iron in the surface-near-wall liquid film, which are non-negative real vectors;

[0148] Equivalent removal rate matrix A diagonal nonnegative matrix, a matrix function that maps energy flux and coherence-wetting history to removal rate; it can be... A diagonal array was used to characterize the instantaneous mass transfer coefficients of each ion under ultrasonic-microfluidic shearing.

[0149]

[0150] Reference rate constant: Chloride ion reference mass transfer coefficient (offline calibration, approximately) ); Free iron reference mass transfer coefficient (approximately) );

[0151] Power gain function:

[0152]

[0153] The sublinear saturation characteristics of ultrasonic power with respect to cavitation-microfluidic disturbance intensity are characterized. Fluid cooperative function:

[0154]

[0155] The shear pulsation and complete wetting left by the quantified coherent jet simultaneously enhance the ion exchange rate.

[0156] Chloride concentration Free iron concentration Each component represents the target to be removed; average coherence. Average wetting : Continuing from step one and step two; the interval is Improve boundary convection refresh.

[0157] The closed-form solution and the degree of removal are defined as follows:

[0158]

[0159] Where: matrix exponent solution The solution operator for a linear system is an exponential matrix. The closed-form evolution is given, and the degree is removed. Dimensionless removal fractions for two types of pollution; the interval is... One of the bases for release; initial value :Depend on The value is obtained by estimating the initial contamination amount using a fixed decoupling matrix, and is a non-negative real number; the cleaning time is also given. : Same definition as before, sampling time.

[0160] To ensure minimal contamination, very low doses of complexation assistance are activated only when free iron removal is insufficient:

[0161]

[0162] Where: Chemical-assisted gating Binary indicator, This determines whether to enable complexation assistance; the target removal threshold. Offline fixed threshold, Minimize the policy threshold;

[0163] Complexation rate constant : Equivalent rate of complexation at extremely low doses, non-negative real number, enhances iron removal. Indicator function Event indication, ; This represents the rate of change in free iron concentration.

[0164] When triggered, a fixed extremely low molar ratio complexing agent is used, with the upper limit of dosage equal to the lower limit of the process specification. And force a second rinse; start and stop are only controlled by The decision was made not to allow for human intervention.

[0165] Therefore, through The single-chain mapping can achieve ion removal loop closure without additional parameter tuning, and provides minimal chemical assistance for iron residues that is triggered only when necessary. Fixed chemical pathways refer to pH, temperature, time window, and rinsing sequence being locked according to the operating instructions;

[0166] In use, chloride salts and free iron achieve high removal within a short time window, and the chemical dosage is gated at zero or extremely low levels, significantly reducing the risk of side reactions in subsequent passivation. Tag-driven energy flux design and removal kinetics ensure the sequence of desorption-migration-carry-off is maintained, while a minimal chemical input strategy is employed, providing a clean and controllable initial surface state for passivation.

[0167] If the passivation film is not rebuilt in time after deionized ultrasonic cleaning, early corrosion will be triggered by the combined effect of high-energy active state and microcrack retention. At the same time, the thickness of the passivation film, chromium enrichment and surface free energy need to be taken into account so that the next step of isotropic ultrafinishing and low plasticity rolling can complete stress reengineering without breaking the film.

[0168] Therefore, it is necessary to rebuild the passivation membrane and output chemical state quantities that can be used for release by using a fixed chemical pathway and tag-driven time schedule, and then freeze the membrane structure through controlled drying and clean storage.

[0169] In a stationary chemical system, an interfacial field coupling model is used to describe the simultaneous growth of passivation film thickness and chromium enrichment, and the feasibility is given using mass functional theory. Let the chemical state vector be... The evolution of passivation film thickness and the chromium enrichment metric are as follows:

[0170]

[0171]

[0172] In the formula: For film thickness growth rate, passivation film thickness Film thickness evolving over time is a positive real function and is a key indicator of corrosion resistance; growth coefficient : Membrane growth reference rate, a positive real number, determines the growth intensity; oxidant equivalent concentration : The oxidizing capacity in a standard chemical system is quantified as a positive real number, driving film growth and representing a fixed process constant; geometric hysteresis coefficient The geometric inhibition of thickness growth is a non-negative real number, reflecting the diffusion rate limit;

[0173] Effective electrochemical barrier : Interface reaction barrier, a positive real number, modulates the growth exponential term; surface potential Interface potential, a positive real number, reduces the potential barrier; a fixed monitoring quantity in the process; dissolution coefficient. The self-dissolution rate of the thin film is a non-negative real number that increases in equilibrium.

[0174] Chromium enrichment ratio Surface chromium / iron molar ratio, a measure of film density and self-passivation capability; surface chromium / iron molar fraction. : Instantaneous surface components, which are non-negative real numbers;

[0175] Initial value coefficients Growth weight Offline calibration constants are real numbers, mapping the time integral to enrichment degree; enrichment hysteresis coefficient. Thickness acts as a shield against enrichment; it is a non-negative real number, representing a diffusion barrier.

[0176] The membrane quality functional and release boundary are defined as follows:

[0177]

[0178]

[0179] Where: Membrane mass functional The comprehensive score of thickness, composition, and surface performance is a real number and serves as the main benchmark for release measurement; time. : Total passivation duration, a positive real number, representing the sampling time; weight Offline fixed weights, which are non-negative real numbers, balancing the three weights; reference film thickness. Reference table Normalized constants are positive real numbers, thus unifying the dimensions of quantities.

[0180] Surface free energy Surface free energy after passivation, a positive real number, representing an indicator of adhesion and recontamination risk; release threshold. Fixed threshold, a real number, is the release boundary; contact angle. Water contact angle Degrees, hydrophobic / hydrophilic balance index; upper limit angle : Maximum permissible contact angle, degrees, limits on easily contaminated surfaces; chemical release status Binary determination, for This serves as the qualified position for writing back the label.

[0181] Therefore, based on the indicator vector Triggered fixed chemical pathways and timelines allow film thickness and chromium enrichment to increase synchronously and with A release decision is given. In use, the film growth exhibits a predictable trajectory of rapid growth followed by passivation. Chromium enrichment and surface energy are synergistically optimized, enabling subsequent isotropic ultrafinishing and low-plasticity rolling to obtain a stable chemical substrate.

[0182] If the environment is humid and hot or the particle load is high after passivation, a thin water film can easily form on high surface energy areas, causing particles to re-adhere. Therefore, the drying and storage process is constrained by the recontamination risk functional, and the final chemical state is written back to the label.

[0183]

[0184]

[0185] Where: probability of recontamination The risk of recontamination during the drying-storage stage is... Process compliance measurement; drying time : Total controlled drying time, a positive real number, upper limit of integration; air particulate concentration Environmental particulate load, a non-negative real function, is a measure of external pollution sources, derived from an online particle counter for cleanliness; surface free energy. Take the equivalent value of the online rapid contact angle detection;

[0186] Reference concentration Normalized reference, positive real number, dimensionless; viscosity The adhesion tendency derived from surface free energy is... Surface adhesion index;

[0187] The constant of the degree of freedom of the surface energy : Scaling constant, a positive real number, modulates the exponent term; weight Offline fixed weights, non-negative real numbers, balancing adhesion and humidity terms; environmental water activity. The equivalent quantity of ambient relative humidity is Condensation risk is measured and converted from temperature and humidity probes; critical water activity. : Thin film condensation threshold, is Humidity penalty is enabled, based on the measured critical point for non-condensation and fogging (offline curing).

[0188] Define the write-back label by combining the risk boundary and release conditions:

[0189]

[0190]

[0191] Where: chemical binding identifier The new key generated by the irreversible hash is a string or a large integer, which injectively binds the chemical state to the original tag; This is an ion concentration vector. For passivation qualified positions; For surface integrity labels;

[0192] Surface Integrity Extended Tag : Extended labels containing chemical state and risk measure, which are structures and serve as the sole input for subsequent steps; hash function A hash function is a one-way function that maps input data of arbitrary length to a fixed-length output string according to defined rules, ensuring traceability and non-repudiation. The output string is usually called a "hash value," "digest," or "fingerprint."

[0193] Therefore, risk functional theory couples the three factors of particle size, humidity, and surface energy during the drying-sealing stage, and irreversibly binds the chemical state back to the same link. During use, the probability of recontamination... The chemical state is kept within an acceptable range, and the traceability and uniqueness of the chemical state are guaranteed, so subsequent processes can directly use it without reinterpreting the history.

[0194] Step 4: Expand the label based solely on surface integrity. Under the constraints, isotropic ultrafinishing and low plasticity rolling are combined to achieve anisotropic surface morphology, reduce the tendency of micro-seam retention, form surface compressive stress and stabilize geometric tolerances, and release and write back labels with rapid indication inspection.

[0195] Existing chemical release status The passivation film thickness was guaranteed. With surface free energy Within a controllable range, if the directional ridge of the processing texture is still retained, it will induce wetting non-uniformity and local electrochemical activation sites, thereby amplifying local plastic concentration in the next step of low-plasticity rolling. Therefore, it is necessary to implement ultra-finishing by frequency anisotropy + film protection constraint, first reducing the directionality of the morphology to within an acceptable threshold, and then suppressing micro-slit retention through geometric-surface energy synergy.

[0196] In the sealed working zone, anisotropic indices are constructed based on surface gradient directions, and the ultrafine shear energy density is constrained by a membrane protection functional to ensure that removal occurs within the membrane safety window without membrane damage. Anisotropic indices are defined as follows:

[0197]

[0198] Where: Anisotropic index : Describes the degree to which the morphological distribution is nearly uniform; the interval is The principal scale of the isotropic target is selected offline at the point where the offset in the subsequent rolling direction is minimized;

[0199] Directional distribution The directional probability density, obtained by surface gradient normalization, is a non-negative integrable function that characterizes the trench orientation intensity. It is acquired using the gradient direction histogram of the sealing working zone (Sobel / Scharr + direction quantization), and kernel density smoothing is employed to avoid noise. (Integral angular domain) : Directional half-space, which is an angle, to avoid repetition of directions;

[0200] To avoid damaging the passivation film, a film protection functional is established and an upper bound is applied:

[0201]

[0202] Where: Membrane protection functional The ultrafine shear energy is the normalized load on the membrane, a non-negative real number, and a criterion for membrane safety; ultrafine shear... The tangential stress of the contact element is a non-negative real number, driving the material's micro-cutting / scraping. Ultra-finishing uses elastic wiping / micro-cutting tools, estimated using a normal load-relative velocity-friction coefficient model; threshold shear. The equivalent shear threshold, obtained from the ratio of surface free energy to film thickness, is a positive real number. For passivation film thickness;

[0203] index : Energy nonlinear amplification index, which is a positive real number; spatial domain : Area of ​​the sealing working zone, representing the region and the integration range; upper time limit. : Total time for ultra-fine calibration, a positive real number, process window; complete mask for film. : Membrane coverage indicator, 1 (released area), characterizing the effective area.

[0204] To control the scale of geometric removal, a removal budget is defined:

[0205]

[0206] Where: thickness removed Equivalent material removal cumulative, a non-negative real number, tolerance stability constraint; removal coefficient : The conversion coefficient from cutting to removal, a positive real number, coupling shearing and removal; threshold shearing : Micro-cutting start threshold, a non-negative real number, suppresses low-shear grinding and polishing; upper bound Geometric removal of the budget upper limit, which is a positive real number, ensures tolerance;

[0207] Therefore, isotropic index Enhancement and membrane protection functional The upper bound of the joint locks the isotropic operating domain without damaging the film; thus, geometric drift is suppressed within a fixed removal budget. In use, the trench orientation is eliminated into a near-isotropic distribution, the surface film integrity is maintained within a safe threshold, and a uniform contact substrate that is conducive to subsequent rolling is obtained while maintaining tolerance stability.

[0208] While maintaining membrane integrity, the retention tendency of micro-slits is quantified and suppressed by identifying curvature basins and coupling them with surface energy. The retention tendency index is defined as follows:

[0209]

[0210]

[0211] In the formula: tendency to stay : Dimensionless intensity of micro-slit / valley bottom liquid film retention; range is A key negative indicator of subsequent corrosion readiness; area : Area of ​​the sealing working zone, a positive real number, normalized; Basin indicator A trough indicator with negative principal curvature. Select potential areas of confinement;

[0212] Heaviside function Step function Gated curvature sign; step function is ;

[0213] Principal curvature Surface principal curvature, a real function, is used as a criterion for determining the surface roughness; reference film thickness. : Normalized constant, a positive real number, a dimensional reference; contact angle Water contact angle, is Degree, a characteristic of wetting-retention.

[0214] To ensure geometry-energy consistency, the conditions for topography-energy uniformity are given:

[0215]

[0216] Where: the uniform functional : Energy measure of curvature spectrum variation, a non-negative real number, to prevent the generation of new directional textures; surface height : Height field before and after superfinishing, difference object; upper bound : The upper limit of the allowable curvature energy change, which is a positive real number and represents a stable morphology spectrum.

[0217] Therefore, the tendency to stay The pressure is reduced by the combined effect of film thickness and surface energy, and the curvature spectrum variation is limited to avoid secondary directional texture. In use, the liquid film and ions in the micro-slits are difficult to be trapped for a long time, and the contact stress introduced by subsequent rolling propagates more uniformly on the surface without triggering new chemical activation sites.

[0218] If residual tensile stress is not re-engineered, pitting corrosion initiation in the chlorinated environment of pool water will be amplified; however, excessive plastic rolling will damage the membrane and cause geometric drift. Therefore, it is necessary to... In the chemical-mechanical context, a transfer function of load time history-contact radius-compressive stress depth is constructed, and the geometric drift and corrosion readiness double boundary criterion are used as the termination condition.

[0219] Residual work in all directions of the index thermal damage indicator The load time history is determined, and the contact scale is decoupled from the Hertzian contact, and then anisotropic indices are used. Modulate the direction weights to obtain the compressive stress depth spectrum. Define the load time history:

[0220]

[0221]

[0222] Where: Rolling load : Normal load time history, a positive real function, driving contact plasticity; minimum / maximum load Device limits, positive real numbers, defining the range; Sigmoid function. Smooth mapping, for Suppress load mutations; weights : Load sensitivity coefficient, a positive real number, characterizes the effect of residual work on load switching;

[0223] Residual work standard Offline calibration constant, a positive real number used for normalization; rising slope Soft-start slope, a positive real number, to avoid instantaneous shocks; membrane gating. Safety gate driven by membrane quality functional. Membrane quality functional : Continuing from step three, the values ​​are real numbers, membrane quality indicators, and weights. : Gating weight, a positive real number, modulates the gating sensitivity.

[0224] Based on Hertzian contact, the contact radius and average pressure are defined as follows:

[0225]

[0226] Where: contact radius The contact dimensions of the workpiece during rolling determine the stress extension; the ball radius... : Tool geometry parameters, which are positive real numbers; contact geometry; equivalent elastic modulus. Material composite modulus, a positive real number, representing elastic response; mean pressure. The contact mean normal pressure is a positive real function, representing the compressive stress source strength.

[0227] The compressive stress spectrum is given by directional weight and depth index:

[0228]

[0229]

[0230]

[0231] Where: compressive stress spectrum : compressive stress in the depth direction; surface amplitude Surface compressive stress amplitude, a non-negative real number, representing the surface modification strength; directional weight. : Directional factor modulated by anisotropic index; interval is Suppress orientation bias; depth scale The compressive stress attenuation length determines the effective depth; gain The proportionality coefficient from pressure to compressive stress is a positive real number, connecting the load and stress; reference length. ,index Offline calibration constants, which are positive real numbers, are used to fit the material response; angle. ,depth : Direction and depth coordinates, which are angles and positive real numbers, and are independent variables.

[0232] The weights for each direction are:

[0233]

[0234] Directional weights The definition is the same as above; the interval is... This maps the degree of anisotropy to the directional response. Anisotropy index : Definition as before; interval is Anisotropy measure. Angle. : Defined as before, direction variable.

[0235] The maximum value of the surface post-stress is used as the compliance criterion:

[0236]

[0237] Maximum tensile stress after surface Surface stress in the most unfavorable direction after rolling, a real number, used as a safety criterion for release; normal stress in the direction of rolling. : Following step two, the original residual stress is projected.

[0238] Therefore, the chain mapping of load time history-contact scale-compressive stress spectrum forms a low-plasticity and effective compressive stress reengineering under membrane gating. In use, the surface tensile stress in all directions is covered by compressive stress, the residual tensile stress peak turns negative and the depth is controllable, providing a basis for the dual objectives of corrosion resistance and fatigue.

[0239] After compressive stress is formed, a dual threshold criterion of geometric drift and corrosion resistance readiness is used as the process termination condition, and the results are written back using an irreversible mapping. The geometric drift metric and retention rate are defined as follows:

[0240]

[0241]

[0242] Where: curvature drift integral The total change in geometric curvature is a non-negative real number and is one of the tolerance stability criteria; profile retention rate. Contour fidelity; range is Evaluation of topography preservation; Gaussian curvature Curvature field and geometric parameters before / after rolling; height field Height and morphological difference before / after rolling; calibration height Normalized scale, positive real numbers, unified dimensions; area : Defined as before, normalization.

[0243] The rapid corrosion resistance readiness index and release definition are as follows:

[0244]

[0245]

[0246] Where: Corrosion resistance readiness index A rapid indicator of comprehensive morphology, composition, surface properties, and retention; the range is... The main positive indicator for release; weighting Offline fixed weights, real numbers, to balance the contributions of various factors; chromium enrichment ratio , film thickness Reference film thickness Surface free energy Reference table Tendency to stay : Definition continues from the previous text; Release status : A release point combining finishing and compressive stress control Whether or not passage is permitted; threshold Upper limit of curvature : Fixed boundary, real number, defined by the compliance domain; maximum surface tensile stress : Defined as above, mechanical boundary.

[0247] Write back to binding and tag construction:

[0248]

[0249]

[0250] In the formula: binding identifier Add an irreversible binding key, which can be a string or a large integer, and injectively bind the result of this step to an existing tag; Time : The end time of rolling, a positive real number, the sampling point; Extended label : A structure, the sole input to the next process; a hash function : Irreversible mapping, is a function, and is non-repudiable.

[0251] Therefore, using geometric drift and rapid corrosion resistance readiness as dual thresholds as termination conditions ensures that compressive stress forming, tolerance stability, and corrosion resistance simultaneously meet the standards, and all results are written back to the same label. In use, without adding new online handles, a closed loop is formed: morphology anisotropy - film protection - compressive stress reengineering - release and write-back, and each quantitative indicator is traceable to... .

[0252] Those skilled in the art will recognize that the units 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.

[0253] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0254] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0255] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0256] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A precision grinding process for machining the shaft of a swimming pool water pump motor, characterized in that: include, An incident window is established using a coherent jet nozzle, allowing the jet to penetrate the air gap and reach the grinding area, where it first wets the area and then introduces the load. Maintain synchronization between injection attitude and trim rhythm; record the incident window, injection attitude, and trim rhythm as operating condition metadata; After fine grinding, thermal damage indicators and residual stress are collected according to material type. Magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel. Cleanliness is also confirmed. The thermal damage indicators, residual stress, and cleanliness are integrated into a surface integrity tag and bound to the operating condition metadata. According to the surface integrity label, perform deionized ultrasonic cleaning and rinsing to remove chloride salts and free iron, perform chemical passivation to rebuild the passivation film according to specifications, dry in a controlled manner and seal cleanly; write the chemical status qualification information back to the surface integrity label; Under the premise that the chemical state is qualified, isotropic superfinishing is performed on the sealing working strip to weaken the directionality, and then low plasticity rolling is used to form surface compressive stress while maintaining tolerance; The surface integrity label is then quickly verified and confirmed for release. The geometry, opening size, and tilt angle of the injection window are set according to a preset configuration set; the injection attitude is described by pitch angle, yaw angle, and roll angle and synchronized with the dressing rhythm; the injection window, injection attitude, and dressing rhythm are recorded and collected to generate a unique working condition metadata entry, which is associated with the nozzle model, air gap size, and grinding wheel specification index, and is used as a read-only reference in subsequent steps, and a timestamp field is recorded to achieve cross-process timing alignment and consistency verification requirements; A coherence penetration criterion is established, and a coherence threshold and a penetration margin threshold are set. The thresholds are determined by an offline calibration set. When both the coherence and penetration margin meet the thresholds, a soft start of the load is initiated. The load time history is synchronized with the trimming rhythm, and no new online adjustment items are added. The load start time is determined by a wetting threshold and a liquid supply temperature reference. The threshold and reference are derived from the operating condition metadata and are fixed in the batch configuration file.

2. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 1, characterized in that: Testing is performed according to material type. For ferromagnetic steel, magnetic noise signals are collected and wavelet energy is calculated immediately after grinding. For austenitic steel, residual stress projection is obtained by multi-angle X-ray diffraction. Cleanliness is confirmed by using the image skeleton penetration rate, conductivity, and colorimetric readings, and the data is fielded. The acquisition trajectory is consistent with the sealed working belt, and the sampling frequency and tilt range are fixed according to the work instructions. Equipment calibration records are archived with each batch.

3. The precision grinding process for machining the motor shaft of a swimming pool water pump according to claim 2, characterized in that: The thermal damage indicator, residual stress projection or anisotropic residual work, cleanliness confirmation result, average coherence, average wetting, and penetration margin are integrated to generate a surface integrity label. The label contains a chemically ready field and a binding identifier, and corresponds one-to-one with the operating condition metadata in an irreversible mapping. At the same time, the structural order and version number of the label fields are specified as the unique input for subsequent steps.

4. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 3, characterized in that: Based on the index vector in the surface integrity label, the ultrasonic energy flux and the action time are mapped, with the constraint that the microfluidic shear does not exceed the membrane protection threshold; Ion parameters were measured using deionization rinsing. If the removal of free iron was insufficient, the minimum complexation assistance was activated. After completion, the chemical state was updated to the label. The upper and lower limits of ultrasonic energy flux were fixed according to the equipment limits. The time history was generated using a soft-start function, and the energy flux and shear estimation trajectory were recorded.

5. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 4, characterized in that: Chemical passivation is performed under a fixed chemical path, which includes a preset combination of pH, temperature, time window and rinsing sequence. After passivation, film thickness, chromium enrichment, surface free energy and contact angle are measured and combined with ion removal degree to form a chemical state vector. Then, controlled drying and clean sealing are performed according to particle concentration and water activity threshold, and the chemical state is written back to the surface integrity tag and a chemical binding identifier is generated.

6. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 5, characterized in that: Under the premise that the chemical state is qualified, isotropic superfinishing is carried out on the sealed working zone, the isotropic index is limited to reach the preset threshold, the cumulative material removal does not exceed the removal budget, and the upper limit of the contact shear energy density is applied by the membrane protection functional. The ultra-fine finishing domain is consistent with the aforementioned cleanliness and chemical state measurement domains, while setting an upper limit for curvature energy change and integrating it using the same spatial mask.

7. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 6, characterized in that: The soft-start time history of rolling load is generated using the anisotropic residual work and thermal damage indication in the surface integrity label, and the contact radius and average pressure are calculated based on Hertzian contact to obtain the surface compressive stress amplitude and depth scale. The rolling process ends under geometric drift and profile preservation constraints, and the relevant parameters are written into the label. The final values ​​of the maximum tensile stress, anisotropy index and retention tendency are recorded as input fields for subsequent judgment and traceability.

8. The precision grinding process for machining the shaft of a swimming pool water pump motor according to claim 7, characterized in that: A read-only calibration set is established to store thresholds, weights, kernel scales, rate constants, and geometric budgets. This calibration set is generated from offline experiments and fitting. The mapping function, judgment conditions, and write-back fields are read only from the surface integrity label and the calibration set. The online modification entry is not open, and the version number, generation time, and applicable material range are written into the batch configuration for consistency verification.

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