Optimized processing method for oil hole of automobile clutch

Abstract

The application relates to the technical field of oil hole processing, and discloses an optimized processing method for an oil hole of an automobile clutch, which comprises the following steps: obtaining clutch workpiece requirement parameters, setting drilling data of a drill bit according to the clutch workpiece requirement parameters; setting a multi-hole synchronous path and an optimal drilling sequence; executing a high-frequency micro-vibration and spraying synchronous strategy, using high-frequency micro-vibration drilling, and spraying an oil-repellent functional nano coating on the inner wall of the hole; executing a negative pressure chip removal auxiliary strategy, using negative pressure to suck the chips generated in the drilling process, monitoring real-time drilling parameters in the drilling process, judging whether the current drilling state is in a stable processing interval according to the real-time drilling parameters; executing a local laser deburring strategy, using focused laser pulses to perform a small thermal blasting on the local hole to clean burrs; judging whether the hole processing quality meets the standard according to quality detection data; and the processing stability and coating consistency are improved, and the defect rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of oil passage hole processing technology, specifically an optimized processing method for oil passage holes in automotive clutches. Background Technology

[0002] As a key component of the automotive transmission system, the performance stability of the clutch directly affects the vehicle's power output and handling performance. To ensure reliable operation of the clutch under conditions such as high-frequency starting, friction, and cooling, multiple tiny oil passage holes are typically provided on the clutch housing or pressure plate to achieve rapid distribution and return of lubricating oil. The machining quality of these oil passage holes directly affects lubrication efficiency and service life. Therefore, developing a process solution for efficient and precise machining of clutch oil passage holes has significant engineering practical value and promising industrial application prospects.

[0003] The current machining process for oil passage holes in automotive clutches mostly employs traditional drilling methods, which have the following technical drawbacks: Due to the small diameter and dense distribution of the holes, traditional drilling processes are prone to problems such as poor chip removal and chip accumulation inside the holes, affecting machining efficiency and hole quality; the ability to synchronously integrate the coating function on the inner wall of the hole is weak, requiring reliance on post-processing steps, which increases process time and cost; the lack of real-time feedback control on the drilling process status makes it difficult to adjust parameters in a timely manner, easily leading to defects such as hole wall ablation and coating damage; deburring operations for locally curved or irregularly shaped holes are mostly performed manually, resulting in poor consistency and low efficiency; the overall machining process does not achieve synchronous path optimization and closed-loop quality control throughout the entire process, making it difficult to meet the requirements of high consistency and automated production.

[0004] This invention provides an optimized machining method for oil passage holes in automotive clutches. By employing strategies such as high-frequency micro-vibration drilling, synchronous spraying, negative pressure chip removal, and laser deburring, this invention constructs an intelligent closed-loop machining process, achieving high-precision and high-efficiency machining of the oil passage holes. This method improves machining stability and coating consistency, reduces defect rates, and solves problems such as difficult chip removal, numerous burrs, and large quality fluctuations in traditional processes, making it suitable for automated mass production. Summary of the Invention

[0005] This invention provides an optimized machining method for the oil passage hole of an automotive clutch, which helps to solve the problems mentioned in the background art.

[0006] Firstly, this application provides an optimized machining method for an oil passage hole in an automotive clutch, employing the following technical solution: An optimized machining method for an oil passage hole in an automotive clutch, comprising:

[0007] S1. Establish the reference plane with the orientation of the machining surface, fix the clutch workpiece in the positioning fixture, and make the hole position consistent with the reference plane of the fixture;

[0008] Obtain the required parameters for the clutch workpiece, and set the drilling data for the drill bit based on the required parameters for the clutch workpiece;

[0009] S2. Locate the hole coordinates and set the multi-hole synchronous path and optimal drilling sequence;

[0010] A strategy of simultaneous high-frequency micro-vibration and spraying was implemented, using high-frequency micro-vibration to drill holes and simultaneously spraying an oleophobic nano-coating onto the inner wall of the hole.

[0011] S3. Implement a negative pressure chip extraction auxiliary strategy. Set up a micro negative pressure chip extraction channel at the bottom of the hole to use negative pressure to suck up the chips generated during drilling and discharge the chips from the processing area.

[0012] S4. Monitor the real-time drilling parameters during the drilling process and determine whether the current drilling state is in a stable processing range based on the real-time drilling parameters.

[0013] If the state is determined to be unstable, an adaptive adjustment strategy for drilling parameters is executed, dynamically changing the feed rate, micro-vibration frequency, or spray flow rate.

[0014] S5. Based on the different hole diameters and curved surfaces, implement a local laser deburring strategy, using focused laser pulses to perform micro-thermal explosion cleaning of burrs in the local area of ​​the hole.

[0015] S6. After drilling is completed, obtain the quality inspection data of the target hole;

[0016] The quality inspection data is used to determine whether the hole processing quality meets the standard. If it does, the next hole processing step is started. If it does not meet the standard, the defective hole is marked and reprocessing or coating repair is performed.

[0017] The process of synchronously processing and inspecting all holes is completed sequentially.

[0018] The machining process of the oil passage hole for automotive clutches was optimized through a series of innovative technological means. First, precise positioning and the establishment of a reference surface ensured high machining accuracy. Second, a strategy combining high-frequency micro-vibration and simultaneous spraying improved the hole wall quality and the uniformity of the functional coating. Third, a negative pressure chip removal assist strategy effectively solved the chip removal problem during deep hole drilling. Real-time monitoring and adaptive adjustment mechanisms ensured the stability of the machining process, while local laser deburring technology overcame the limitations of traditional deburring methods.

[0019] Preferably, the establishment of the reference surface is oriented towards the machining surface, and the clutch workpiece is fixed in the positioning fixture, so that the hole position is consistent with the fixture reference surface, including:

[0020] Obtain the three-dimensional structural data, oil passage hole coordinate parameters, and hole number distribution information of the clutch workpiece to be processed;

[0021] Based on the geometric information and machining requirements of the clutch workpiece, the orientation of the machining surface is selected as the reference surface;

[0022] Fix the clutch workpiece in a special positioning fixture and align the machined surface of the clutch workpiece with the reference surface;

[0023] Ensure that the machined surface of the workpiece is consistent with the datum surface and that the hole position is aligned with the reference surface of the fixture;

[0024] Obtain the required parameters for the clutch workpiece, including the workpiece material, hole diameter requirements, and coating characteristics;

[0025] Select the appropriate drill bit type and specifications based on the material and hole diameter requirements of the workpiece;

[0026] Based on the required parameters of the clutch workpiece, the drilling data of the drill bit is set, including drilling speed, feed rate, high-frequency micro-vibration frequency and spraying parameters.

[0027] Based on the drilling data of the drill bit and the required parameters of the clutch workpiece, the drilling operation is initiated to complete the hole machining operation.

[0028] By acquiring the three-dimensional structural data and hole position parameters of the clutch workpiece, and combining the material and process requirements to set the drill bit type and drilling data, the drilling conditions can be adapted to different materials and sizes, realizing personalized parameter configuration, reducing human judgment errors, and improving drilling accuracy and hole wall quality.

[0029] Preferably, the positioning hole coordinates, setting the multi-hole synchronous path and optimal drilling sequence, includes:

[0030] Establish a local coordinate system for the clutch workpiece and calibrate the initial origin position;

[0031] Locate the spatial coordinates of all machined holes, including the hole opening position, hole axis direction, and hole depth;

[0032] Let P be the set of all holes to be machined, and denote it as... , ,in, This represents the coordinate position of the i-th hole. This indicates that there are a total of n holes to be machined;

[0033] Using industrial control path optimization algorithms, path optimization calculations are performed on all hole positions to generate the shortest processing path;

[0034] Setting hole To the hole The processing movement cost is ;

[0035] Set all path sequences as The shortest processing path is Where k represents the k-th hole in the path, This represents the distance from the k-th hole to the (k+1)-th hole.

[0036] By constructing a local coordinate system for the workpiece and a set of spatial coordinates for the hole positions, and introducing an industrial control path optimization algorithm to determine the optimal drilling sequence, the spindle movement path and non-machining time are effectively reduced, and the drilling path utilization rate is improved. This method is suitable for batch processing of multi-hole structures and significantly improves the efficiency of synchronous multi-hole processing.

[0037] Preferably, the strategy of simultaneous high-frequency micro-vibration and spraying, which utilizes high-frequency micro-vibration for drilling and simultaneously sprays an oleophobic nano-coating onto the inner wall of the hole, includes:

[0038] High-frequency axial micro-vibration is superimposed during the drill bit feeding process;

[0039] Setting up a micro-vibration feed signal superposition model , ,in, This indicates the axial position during normal drilling, and A represents the micro-vibration amplitude. Indicates the micro-vibration frequency;

[0040] The actual feed rate after superposition is , ;

[0041] During the drill bit retraction phase, the spraying device is automatically activated, and multi-axis coordinated control is used to uniformly spray the oleophobic nano-coating material onto the inner wall surface of the hole.

[0042] Based on the surface characteristics of the holes, including surface shape, surface curvature, and hole size, the particle size, pressure, and spraying angle are controlled.

[0043] After spraying, the coating is dried using natural airflow.

[0044] By superimposing high-frequency micro-vibration during drilling feed and simultaneously spraying an oil-repellent coating during the retraction stage, the lubrication and oil guiding functions of the hole wall are improved, burr generation is suppressed, and the surface finish of the hole is improved. The dynamic control of coating particle size, angle, and pressure effectively improves the uniformity of spraying and the durability of function, realizing precision functional machining inside the hole.

[0045] Preferably, the implementation of the negative pressure chip extraction auxiliary strategy involves setting a micro negative pressure chip extraction channel at the bottom of the hole to use negative pressure to suck in the chips generated during drilling and discharge the chips from the machining area, including:

[0046] Obtain the target hole position parameters, including hole diameter, hole depth, machining material, and drilling method required for machining;

[0047] Based on the target hole position parameters, at least one micro negative pressure chip removal channel is preset at the bottom of the target hole. The micro negative pressure chip removal channel passes through the clutch workpiece and is connected to the external negative pressure.

[0048] During the drilling process, the critical depth h of the hole is set;

[0049] When the drill bit feeds to a hole depth exceeding the preset critical depth h, negative pressure chip removal is triggered.

[0050] A negative pressure airflow is applied to form an attractive force field along the hole axis, which sucks out the chips generated during drilling and discharges the chips from the machining area.

[0051] By setting a micro negative pressure chip removal channel at the bottom of the hole and triggering the chip removal device when drilling to the critical depth, the chips are continuously sucked out of the machining area inside the hole, preventing chip accumulation from causing blockage, overheating and tool wear. This achieves efficient chip removal machining for both deep and small holes, effectively extending tool life and improving drilling continuity stability.

[0052] Preferably, the real-time monitoring of drilling parameters during the drilling process, and the determination of whether the current drilling state is in a stable processing range based on the real-time drilling parameters, includes:

[0053] Real-time monitoring of drilling parameters during the drilling process, including feed rate, micro-vibration frequency, spraying pressure and rotation speed;

[0054] Based on the clutch workpiece requirements and real-time drilling parameters, the stable machining range threshold for each drilling parameter is set as follows: ;

[0055] Real-time drilling parameters and threshold range Conduct comparative analysis;

[0056] If all real-time drilling parameters are within the threshold range If the current drilling state is stable, then the drilling state is stable.

[0057] If any real-time drilling parameter is not in the threshold range If the current drilling state is unstable, an adaptive adjustment strategy for drilling parameters will be executed.

[0058] Optimization and adjustments are made based on different anomaly characteristics:

[0059] Adjust the feed rate to match the current drilling load;

[0060] Adjusting the micro-vibration frequency and amplitude suppresses abnormal vibration and improves chip removal capability;

[0061] Adjusting the spray flow rate and pressure improves the lubrication and cooling of the hole walls.

[0062] By collecting multiple key parameters during the drilling process in real time and comparing and analyzing them with preset stable ranges, it can promptly determine whether the drilling state is stable. If abnormal, it can dynamically adjust the drilling speed, micro-vibration frequency, or spraying parameters, effectively improving the adaptive capability of the drilling process and achieving stable machining control throughout the entire process under complex working conditions.

[0063] Preferably, the step of implementing a local laser deburring strategy based on different hole diameters and curved surfaces, using focused laser pulses to perform micro-thermal explosion cleaning of burrs within the hole, includes:

[0064] Obtain burr distribution data on the surface of the target hole;

[0065] Based on the different apertures and the interior of the curved surface, a laser processing strategy matching the aperture and the curved surface is set.

[0066] Based on the depth of the hole and the location of the burr, the laser focusing distance is set as follows: ;

[0067] Based on the material type and burr adhesion strength of the clutch workpiece, the laser pulse energy is set to... ;

[0068] Control the multi-axis laser head to enter the target position inside the hole for scanning;

[0069] Applying a short-duration, high-energy-density laser pulse generates a localized micro-thermal explosion effect in the burr area, instantly melting the burr metal structure.

[0070] After cleaning, the deburred area inside the hole is rescanned. If burrs are detected, a second laser deburring is performed.

[0071] By setting laser focusing parameters according to the aperture and surface characteristics, and controlling the laser pulse to perform local thermal explosion in the burr area, the tiny burrs inside the hole that are difficult to reach by traditional methods can be effectively removed. This avoids the decrease in sealing performance and component interference caused by burr residue, improves the quality of the finished hole, and is suitable for complex irregular inner hole structures.

[0072] Preferably, the step of judging whether the hole processing quality meets the standard based on the quality inspection data, and proceeding to the next hole processing step if the quality meets the standard, and marking the defective hole and performing reprocessing or coating repair operations if the quality does not meet the standard, includes:

[0073] After the target hole drilling operation is completed, a hole machining completion signal is automatically issued, and a hole quality assessment operation is performed.

[0074] Obtain the quality inspection preparation parameters R, including the inspection method, hole number, inspection tolerance standard, and surface defect judgment rules.

[0075] Set target quality monitoring parameters Calculate the difference in quality parameters ;

[0076] Set the quality parameter threshold to The quality inspection preparation parameter R and the quality parameter threshold are combined. Perform a comparison;

[0077] If the difference of all quality parameters All are less than the quality parameter threshold. If so, it is recorded as a qualified hole;

[0078] If the difference of any quality parameter Greater than the quality parameter threshold If so, the hole is considered defective and its coordinates are recorded.

[0079] Based on the coordinates of the unqualified holes and the type of defect, corresponding compensation processing is carried out;

[0080] If there is a slight deviation in hole diameter or burr residue, perform local hole repair and reprocessing.

[0081] If the inner wall is damaged, the coating is missing, or the shape is distorted, perform micro-repair of the inner wall or re-spray the coating.

[0082] After machining is completed, all holes are optimized.

[0083] By immediately inspecting the processing quality of each hole after processing and judging whether it is qualified or not according to the inspection standards, if it is not qualified, reprocessing or coating repair operations are carried out to achieve closed-loop control, prevent defective holes from flowing into the assembly process, and improve the overall batch processing yield and consistency.

[0084] The present invention has the following beneficial effects:

[0085] 1. This optimized machining method for oil passage holes in automotive clutches, through the establishment of a standardized reference surface and the setting of a multi-hole synchronous machining path, ensures that the hole positions are aligned with the fixture reference surface, guaranteeing machining start-up accuracy. Simultaneously, combining high-frequency micro-vibration drilling with a path optimization algorithm not only improves the stability of the drilling process but also significantly enhances the machining efficiency of multiple holes. Micro-vibration control improves drill bit cutting performance while effectively reducing hole wall surface roughness, thereby improving hole diameter consistency and hole forming accuracy. Optimal path planning shortens the machining cycle by reducing the total drilling path length and the number of drill bit movements. Furthermore, with automated process control, the entire machining process can achieve high-efficiency operation, making it particularly suitable for machining scenarios with high-density distributed small holes, meeting the dual requirements of high efficiency and high precision for the complex structure of modern automotive clutches.

[0086] 2. This optimized machining method for automotive clutch oil passage holes enhances the system's intelligent response capability by introducing real-time monitoring and adaptive parameter adjustment strategies during the machining process. By collecting parameters such as drilling feed rate, micro-vibration frequency, and spray flow rate in real time and comparing them with set thresholds for a stable machining range, the system can automatically determine whether the current machining state is stable. If an unstable state occurs, it will quickly execute parameter adjustment actions to achieve dynamic closed-loop control. Combined with a micro-negative pressure chip removal channel at the bottom of the hole, chips can be removed in real time during deep hole machining, avoiding problems such as chip clogging and overheating, while reducing drill wear and improving machining continuity and stability. This intelligent control and auxiliary chip removal linkage strategy effectively avoids the impact of human error or parameter fluctuations on machining quality, significantly enhancing the stability and automation of the machining process.

[0087] 3. This optimized processing method for oil passage holes in automotive clutches involves performing a localized laser deburring process after the hole's internal machining. A focused laser pulse is used to locally thermally deburr residual burrs on the hole wall, ensuring complete removal of burrs without damaging the hole's internal structure. Laser parameters are precisely set according to the hole diameter, depth, and material properties to adapt to the processing needs of holes with varying complexity. Subsequently, an oil-repellent nano-coating is simultaneously applied. Through multi-axis coordinated precision control of the spray flow rate, angle, and particle size, the coating is uniformly applied to the inner wall surface of the hole, enhancing its oil-repellent, corrosion-resistant, and wear-resistant capabilities. This process chain not only improves the functionality of the hole but also extends its overall service life, making it particularly suitable for automotive clutch structural components operating under high-requirement, high-frequency conditions. Attached Figure Description

[0088] Figure 1 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0089] 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.

[0090] Example 1, refer to Figure 1 An optimized machining method for an oil passage hole in an automotive clutch includes:

[0091] S1. Establish a reference plane with the machining surface facing upwards, fix the clutch workpiece in the positioning fixture, and ensure that the hole position is consistent with the fixture reference plane, including:

[0092] Establish the reference surface and the machining surface to be aligned, fix the clutch workpiece in the positioning fixture, and make the hole position consistent with the reference surface of the fixture; obtain the required parameters of the clutch workpiece, and set the drilling data of the drill bit according to the parameters; obtain the three-dimensional structural data of the clutch workpiece, the coordinates of the oil passage hole and the hole number distribution information; set the machining surface as the reference surface and fix the workpiece in the fixture; select a suitable drill bit and set the drilling speed, feed rate, high-frequency micro-vibration frequency and spraying parameters.

[0093] By enabling adaptive parameter settings to suit different materials and structural forms, the automation and process adaptability of the early preparation stage are improved, thereby enhancing overall processing efficiency.

[0094] S2. Implement a high-frequency micro-vibration and spraying synchronization strategy, utilizing high-frequency micro-vibration for drilling and simultaneously spraying an oleophobic nano-coating onto the inner wall of the hole, including:

[0095] All holes to be machined are set as P, with a total of n holes. Using a path optimization algorithm, with the fixture reference surface as the initial origin, the shortest drilling path is calculated to obtain the optimal drilling sequence. By reducing unnecessary paths and turning operations, the overall machining time is shortened by approximately 18%. A superhard alloy micro-drill bit with a high-frequency micro-vibration device is selected, and axial vibration is performed at a frequency of 5kHz and an amplitude of 5μm during the feed process. The vibration signal controls the real-time feed rate using a superposition model. After drilling, the spraying device is automatically activated to spray an oleophobic nano-coating material, with the spraying pressure adjusted to 0.3MPa and the angle adjusted to 45° to cover the hole wall surface. After spraying, compressed air is used for rapid drying. Actual measurements show that the uniformity of the coating adhering to the hole wall is improved by 25%, and the oleophobic angle is increased by 12°.

[0096] By optimizing the multi-hole path calculation and adopting the shortest path principle, drilling efficiency is improved, the ineffective spindle movement time is reduced, and the accumulation of repeated positioning errors is avoided. High-frequency micro-vibration-assisted drilling effectively reduces the cutting resistance of the drill bit, and synchronous spraying enables one-time forming of the inner surface of the hole, reducing the number of processes.

[0097] S3. Implement a negative pressure chip extraction assist strategy, setting up a micro negative pressure chip extraction channel at the bottom of the hole to use negative pressure to suck in the chips generated during drilling and discharge them from the machining area, including:

[0098] For oil passages exceeding 10mm in depth, a 2mm diameter micro-negative pressure chip extraction channel is pre-set, penetrating the bottom of the hole and connecting to an external negative pressure pump. During drilling, when the drilling depth exceeds 5mm, a critical depth h is set, triggering the negative pressure device to generate a downward suction airflow along the hole axis, expelling chips in real time and preventing blockage and heat accumulation. Compared to traditional methods, this negative pressure-assisted strategy improves chip removal efficiency by 34%, reduces hole wall heat accumulation by approximately 8°C, and extends drill bit life by 15%.

[0099] By utilizing a micro-negative pressure channel to extract chips in real time, problems such as chip removal difficulties, chip accumulation in the hole, or drill bit jamming occur during deep hole machining. This auxiliary strategy effectively reduces cutting temperature and tool wear, ensures clean hole formation, and improves machining stability. It is suitable for high-quality batch machining of deep holes or small-diameter structures that are difficult to remove chips.

[0100] S4. Real-time monitoring of drilling parameters during the drilling process; based on these parameters, determining whether the current drilling state is within a stable machining range, including:

[0101] Three sets of sensors were deployed during the drilling process to monitor the feed rate, drilling torque, and micro-vibration frequency in real time. A stable machining threshold range was set, and if the system detected any deviation in the current parameters, it immediately fed back to the control system to adjust the feed rate and micro-vibration frequency to maintain drilling stability. The adjustment adopted fuzzy control logic to match load changes, achieving dynamic closed-loop regulation. Test results show that this strategy improved the machining process stability rate to 96% and reduced the incidence of abnormal vibration by nearly 60%.

[0102] By monitoring drilling status parameters in real time and intelligently determining stable ranges, the system adaptively adjusts key process parameters to effectively suppress drilling fluctuations and anomalies, ensuring consistent continuous machining. The system possesses dynamic control capabilities, enabling rapid response to changes in operating conditions, improving machining accuracy, reducing defect rates, and enhancing the overall intelligence level of the equipment.

[0103] S5. Based on the different hole diameters and curved surfaces, implement a local laser deburring strategy, using focused laser pulses to perform micro-thermal explosion cleaning of burrs within the hole, including:

[0104] A 1064nm wavelength nanosecond laser was used as the deburring light source. An autofocus head adjusted the focus according to changes in aperture, and the burr location was identified using endoscopic imaging. The laser energy was controlled at 0.5J with a pulse width of 100ns, applied to the burr for localized thermal explosion removal. After cleaning, a second scan was performed to verify the presence of residue; if residue remained, a second deburring process was automatically executed. This process achieved a burr removal rate of over 98%, with no thermal damage marks on the inner surface of the hole, and a 99% retention rate of the hole edge contour integrity.

[0105] This laser-focused deburring method solves the problem of conventional mechanical deburring's inability to penetrate deep into holes, offering advantages such as non-contact operation, high precision, and minimal damage. Laser thermal detonation enables rapid, localized deburring, improving the edge forming quality and surface finish of holes, significantly enhancing the cleanliness of high-precision micro-holes, and adapting to complex internal cavity structures.

[0106] S6. After drilling is completed, obtain the quality inspection data of the target hole, and determine whether the hole machining quality meets the standards based on the quality inspection data, including:

[0107] After hole machining, a high-precision 3D measuring instrument is used to inspect the hole diameter, roundness, and hole wall roughness, and compare them with preset tolerance ranges. If the inspection results are within the range, the hole is recorded as qualified, and the system automatically moves to the next hole position. If the results exceed the range, the hole is marked as defective and the defect type is identified. If the hole diameter is slightly smaller, fine-tuning hole enlargement is performed; if the coating inside the hole is missing, a touch-up spraying operation is initiated. Through this closed-loop quality control, the overall first-pass yield of hole forming has increased from 88% to 97%.

[0108] An automated inspection system performs comprehensive parameter evaluation of hole machining quality, enabling precise identification and classification of each hole's quality. If defects are detected, intelligent compensation processing or repair can be triggered, forming a closed-loop quality control process. This comprehensively improves product consistency and yield, ensuring product functional reliability.

[0109] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0110] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An optimized machining method for an oil passage hole in an automotive clutch, characterized in that, include: S1. Establish the reference plane with the orientation of the machining surface, fix the clutch workpiece in the positioning fixture, and make the hole position consistent with the reference plane of the fixture; Obtain the required parameters for the clutch workpiece, and set the drilling data for the drill bit based on the required parameters for the clutch workpiece; S2. Locate the hole coordinates and set the multi-hole synchronous path and optimal drilling sequence; A strategy of simultaneous high-frequency micro-vibration and spraying was implemented, using high-frequency micro-vibration to drill holes and simultaneously spraying an oleophobic nano-coating onto the inner wall of the hole. S3. Implement a negative pressure chip extraction auxiliary strategy. Set up a micro negative pressure chip extraction channel at the bottom of the hole to use negative pressure to suck up the chips generated during drilling and discharge the chips from the processing area. S4. Monitor the real-time drilling parameters during the drilling process and determine whether the current drilling state is in a stable processing range based on the real-time drilling parameters. If the state is determined to be unstable, an adaptive adjustment strategy for drilling parameters is implemented, dynamically changing the feed rate, micro-vibration frequency, or spray flow rate. S5. Based on the different hole diameters and curved surfaces, implement a local laser deburring strategy, using focused laser pulses to perform micro-thermal explosion cleaning of burrs in the local area of ​​the hole. S6. After drilling is completed, obtain the quality inspection data of the target hole; Based on the quality inspection data, determine whether the hole processing quality meets the standard. If it does, proceed to the next hole processing step. If it does not meet the standard, mark the defective hole and perform reprocessing or coating repair. The process of synchronously processing and inspecting all holes is completed sequentially.

2. The optimized machining method for the oil passage hole of an automotive clutch according to claim 1, characterized in that, The establishment of the reference surface is aligned with the machining surface. The clutch workpiece is fixed in the positioning fixture, and the hole position is aligned with the fixture reference surface, including: Obtain the three-dimensional structural data, oil passage hole coordinate parameters, and hole number distribution information of the clutch workpiece to be processed; Based on the geometric information and machining requirements of the clutch workpiece, the orientation of the machining surface is selected as the reference surface; Fix the clutch workpiece in a special positioning fixture and align the machined surface of the clutch workpiece with the reference surface; Ensure that the machined surface of the workpiece is consistent with the datum surface and that the hole position is aligned with the reference surface of the fixture; Obtain the required parameters for the clutch workpiece, including the workpiece material, hole diameter requirements, and coating characteristics; Select the appropriate drill bit type and specifications based on the material and hole diameter requirements of the workpiece; Based on the required parameters of the clutch workpiece, the drilling data of the drill bit is set, including drilling speed, feed rate, high-frequency micro-vibration frequency and spraying parameters. Based on the drilling data of the drill bit and the required parameters of the clutch workpiece, the drilling operation is initiated to complete the hole machining operation.

3. The optimized machining method for the oil passage hole of an automotive clutch according to claim 1, characterized in that, The positioning hole coordinates, setting the multi-hole synchronous path and optimal drilling sequence, include: Establish a local coordinate system for the clutch workpiece and calibrate the initial origin position; Locate the spatial coordinates of all machined holes, including the hole opening position, hole axis direction, and hole depth; Let P be the set of all holes to be machined, and denote it as... , ,in, This represents the coordinate position of the i-th hole. This indicates that there are a total of n holes to be machined; Using industrial control path optimization algorithms, path optimization calculations are performed on all hole positions to generate the shortest processing path; Setting hole To the hole The processing movement cost is ; Set all path sequences as The shortest processing path is Where k represents the k-th hole in the path, This represents the distance from the k-th hole to the (k+1)-th hole.

4. The optimized machining method for the oil passage hole of an automotive clutch according to claim 3, characterized in that, The strategy of simultaneous high-frequency micro-vibration and spraying involves drilling holes using high-frequency micro-vibration and simultaneously spraying an oleophobic nano-coating onto the inner wall of the hole, including: High-frequency axial micro-vibration is superimposed during the drill bit feeding process; Setting up a micro-vibration feed signal superposition model , ,in, This indicates the axial position during normal drilling, and A represents the micro-vibration amplitude. Indicates the micro-vibration frequency; The actual feed rate after superposition is , ; During the drill bit retraction phase, the spraying device is automatically activated, and multi-axis coordinated control is used to uniformly spray the oleophobic nano-coating material onto the inner wall surface of the hole. Based on the surface characteristics of the holes, including surface shape, surface curvature, and hole size, the particle size, pressure, and spraying angle are controlled. After spraying, the coating is dried using natural airflow.

5. The optimized machining method for the oil passage hole of an automotive clutch according to claim 2, characterized in that, The aforementioned negative pressure chip extraction assist strategy involves setting up a micro negative pressure chip extraction channel at the bottom of the hole to utilize negative pressure to draw in the chips generated during drilling and discharge them from the machining area. This includes: Obtain the target hole position parameters, including hole diameter, hole depth, machining material, and drilling method required for machining; Based on the target hole position parameters, at least one micro negative pressure chip removal channel is preset at the bottom of the target hole. The micro negative pressure chip removal channel passes through the clutch workpiece and is connected to the external negative pressure. During the drilling process, the critical depth h of the hole is set; When the drill bit feeds to a hole depth exceeding the preset critical depth h, negative pressure chip removal is triggered. A negative pressure airflow is applied to form an attractive force field along the hole axis, which sucks out the chips generated during drilling and discharges the chips from the machining area.

6. The optimized machining method for the oil passage hole of an automotive clutch according to claim 2, characterized in that, The real-time monitoring of drilling parameters during the drilling process, and the determination of whether the current drilling state is in a stable processing range based on the real-time drilling parameters, include: Real-time monitoring of drilling parameters during the drilling process, including feed rate, micro-vibration frequency, spraying pressure and rotation speed; Based on the clutch workpiece requirements and real-time drilling parameters, the stable machining range threshold for each drilling parameter is set as follows: ; Real-time drilling parameters and threshold range Conduct comparative analysis; If all real-time drilling parameters are within the threshold range If the current drilling state is stable, then the drilling state is stable. If any real-time drilling parameter is not in the threshold range If the current drilling state is unstable, an adaptive adjustment strategy for drilling parameters will be executed. Optimization and adjustments are made based on different anomaly characteristics: Adjust the feed rate to match the current drilling load; Adjusting the micro-vibration frequency and amplitude suppresses abnormal vibration and improves chip removal capability; Adjusting the spray flow rate and pressure improves the lubrication and cooling of the hole walls.

7. The optimized machining method for the oil passage hole of an automotive clutch according to claim 1, characterized in that, The aforementioned method involves implementing a localized laser deburring strategy based on different hole diameters and the interior of curved surfaces. This strategy employs focused laser pulses to perform micro-thermal explosions to remove burrs from localized areas within the hole. Obtain burr distribution data on the surface of the target hole; Based on the different apertures and the interior of the curved surface, a laser processing strategy matching the aperture and the curved surface is set. Based on the depth of the hole and the location of the burr, the laser focusing distance is set as follows: ; Based on the material type and burr adhesion strength of the clutch workpiece, the laser pulse energy is set to... ; Control the multi-axis laser head to enter the target position inside the hole for scanning; Applying a short-duration, high-energy-density laser pulse generates a localized micro-thermal explosion effect in the burr area, instantly melting the burr metal structure. After cleaning, the deburred area inside the hole is rescanned. If burrs are detected, a second laser deburring is performed.

8. The optimized machining method for the oil passage hole of an automotive clutch according to claim 1, characterized in that, The process of determining whether the hole processing quality meets the standards based on quality inspection data, proceeding to the next hole processing step if the quality meets the standards, and marking the defective hole and performing reprocessing or coating repair operations if the quality does not meet the standards, includes: After the target hole drilling operation is completed, a hole machining completion signal is automatically issued, and a hole quality assessment operation is performed. Obtain the quality inspection preparation parameters R, including the inspection method, hole number, inspection tolerance standard, and surface defect judgment rules. Set target quality monitoring parameters Calculate the difference in quality parameters ; Set the quality parameter threshold to The quality inspection preparation parameter R and the quality parameter threshold are combined. Perform a comparison; If the difference of all quality parameters All are less than the quality parameter threshold. If so, it is recorded as a qualified hole; If the difference of any quality parameter Greater than the quality parameter threshold If so, the hole is considered defective and its coordinates are recorded. Based on the coordinates of the unqualified holes and the type of defect, corresponding compensation processing is carried out; If there is a slight deviation in hole diameter or burr residue, perform local hole repair and reprocessing. If the inner wall is damaged, the coating is missing, or the shape is distorted, perform micro-repair of the inner wall or re-spray the coating. After machining is completed, all holes are optimized.

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