Titanium alloy wire dry film lubrication coating thickness detection method and device for aviation fastener

Abstract

The application discloses a kind of titanium alloy wire dry film lubrication coating thickness detection method and device for aviation fastener, the present application is arranged in order from front to back along titanium alloy coating production line wire conveying direction, detection device support before coating, No. 1 guide device, laser metering device, guide sleeve, diameter gauge before coating, No. 2 guide device, detection device support after coating, No. 3 guide device, diameter gauge after coating, No. 4 guide device and data acquisition processing system.The present application carries out difference reduction to the wire diameter before coating and after coating at the same position on wire by displacement trigger type time sequence synchronous acquisition mechanism, and realizes 3-12 μm ultra-thin coating high-precision, non-damage, full coverage online detection by high-frequency data filtering optimization algorithm, simultaneously realizes detection system and coating production line linkage start-stop, abnormal sound-light alarm, full data storage traceability, solves the bottleneck of prior art, improves titanium alloy wire coating production intelligent quality control level.

Description

Technical Field

[0001] This invention belongs to the field of automated testing technology for metal wires, specifically relating to a method and apparatus for detecting the thickness of dry film lubricating coating on titanium alloy wires used in aerospace fasteners. Background Technology

[0002] Titanium alloy wire possesses advantages such as high specific strength and excellent corrosion resistance, and is widely used in high-end fields such as aerospace, medical devices, and new energy. To improve the insulation, wear resistance, and lubrication properties of the wire, a protective coating of a certain thickness is usually prepared on the surface of the wire during the production process. The coating thickness directly determines the protection level and service life of the product, and is a core process indicator that must be strictly controlled during the coating production process. Abnormal coating thickness can easily lead to quality defects such as peeling, cracking, and out-of-tolerance outer diameter, and may even directly cause batch scrapping. At present, the industry's titanium alloy wire coating inspection is mainly divided into offline sampling inspection, which cannot meet the needs of continuous high-precision coating production. Specific defects are sampled and inspected using metallographic microscopes and benchtop thickness gauges. This method of inspection is lagging, can only sample a small area, cannot provide real-time feedback on production line process fluctuations, cannot achieve full-coverage quality inspection of the entire line, and the sampling and cutting will cause material loss, making it unsuitable for continuous production lines. Summary of the Invention

[0003] The purpose of this invention is to provide a method and device for detecting the thickness of dry film lubricating coating on titanium alloy wires used in aerospace fasteners. This method uses a displacement-triggered, time-series synchronous acquisition mechanism to subtract the diameter of the wire before and after coating at the same location on the wire. Through a high-frequency data filtering optimization algorithm, it achieves high-precision, non-destructive, and full-coverage online detection of ultra-thin coatings ranging from 3 to 12 μm. Simultaneously, it enables the detection system to be linked with the coating production line for start-up and shutdown, abnormal audible and visual alarms, and full data storage and traceability. This addresses existing technical bottlenecks and improves the level of intelligent quality control in titanium alloy wire coating production.

[0004] A method for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners includes the following steps: S1, along the wire conveying direction of the titanium alloy coating production line, is arranged from front to back as follows: pre-coating inspection device bracket, No. 1 guide device, laser meter counter, guide sleeve, pre-coating diameter gauge, No. 2 guide device, post-coating inspection device bracket, No. 3 guide device, post-coating diameter gauge, No. 4 guide device, and data acquisition and processing system. S2, define the distance from the center of the laser meter to the center of the pre-coating diameter measuring instrument as L1, the wire length between the center of the pre-coating diameter measuring instrument and the center of the post-coating diameter measuring instrument as L2, and the distance between the center of the laser meter and the longest part of the wire as L3. S3. Once the conditions for one-click coating are met, set the coating speed, click the one-click start button, and the coating production line will start running. At the same time, after clicking the one-click start button, the laser meter counter value is reset to zero, and the length of the wire is measured. Simultaneously, the data acquisition and processing system begins to collect the length information from the laser meter counter. When the length reaches L1, the electrical control system begins to collect the diameter data information from the pre-coating diameter measuring instrument. The diameter measuring instrument has a refresh rate of 1000 Hz and a collection period of 100 milliseconds. Ten data samples are collected within 1 second. Invalid data is removed from the ten data samples, and the average value is taken to finally generate the value Dn of the diameter within the length and generate a table. S4, when the length data of the laser meter reaches L1+L2, the electronic control system begins to collect the diameter data information D of the post-coating diameter measuring instrument. m1 At the same time, the diameter data of the pre-coating diameter gauge at the same moment is processed and defined as D. m2 The final output is a thickness. μm, and display this value on the screen.

[0005] A device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, used to implement the above-mentioned method for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, includes a pre-coating detection device bracket, a No. 1 guide device, a laser meter, a guide sleeve, a pre-coating diameter gauge, a No. 2 guide device, a post-coating detection device bracket, a No. 3 guide device, a post-coating diameter gauge, a No. 4 guide device, and a data acquisition and processing system. The pre-coating inspection device bracket is arranged on the frame of the coating production system; the No. 1 guide device is installed on the pre-coating inspection device bracket and located on the far left; the laser meter is installed on the pre-coating inspection device bracket and located to the right of the No. 1 guide device; the guide sleeve is installed on the pre-coating inspection device bracket and located to the right of the laser meter; the pre-coating diameter gauge is installed on the pre-coating inspection device bracket and located to the right of the guide sleeve; the No. 2 guide device is installed on the pre-coating inspection device bracket and located to the right of the pre-coating diameter gauge; the post-coating inspection device bracket is arranged on the frame of the rear belt traction machine; the No. 3 guide device is installed on the post-coating inspection device bracket and located on the far left; the post-coating diameter gauge is installed on the post-coating inspection device bracket and located to the right of the No. 3 guide device; the No. 4 guide device is installed on the post-coating inspection device bracket and located to the right of the post-coating diameter gauge; the data acquisition and processing system is installed on the post-coating inspection device bracket and integrated into an industrial touch screen all-in-one machine.

[0006] Furthermore, the guide sleeve, together with the No. 1 guide device, works together to reduce the vibration of the wire as it passes through the laser meter counter, thereby reducing the impact of wire vibration on meter counting and speed measurement.

[0007] Furthermore, the pre-coating diameter measuring instrument performs online continuous measurement of the wire diameter before coating, and works together with the laser meter to continuously calibrate the wire diameter and micro-element diameter position before coating.

[0008] Furthermore, the No. 2 guiding device, together with the guiding sleeve, works to stabilize the wire within the measuring range of the diameter measuring instrument, reducing the impact of wire movement on diameter measurement.

[0009] Furthermore, the post-coating diameter measuring instrument performs online continuous measurement of the diameter of the coated filament and works together with the laser meter to continuously calibrate the diameter of the coated filament and the position of the micro-element diameter online.

[0010] Furthermore, the No. 4 guiding device works together with the No. 3 guiding device to stabilize the wire within the measuring range of the diameter measuring instrument, reducing the impact of wire movement on diameter measurement.

[0011] The beneficial effects of this invention are as follows: (1) Flexible and non-damaging straightening: Polyurethane soft straightening rollers and rubber-coated guide rollers are used to flexibly contact and transport the wire throughout the process, which fundamentally solves the industry pain point of hard rollers scratching titanium alloy wires and damaging the pre-coated layer, and is suitable for the exclusive production conditions of soft titanium alloy wires. (2) Displacement trigger timing synchronization mechanism: The first displacement trigger acquisition mode based on fixed workstation spacing is used to accurately bind the dimensional data of the same wire cross section before and after coating, completely eliminating the problem of data timing misalignment under dynamic continuous production conditions, and controlling the detection error of ultra-thin coating within ±0.5μm; (3) High-frequency filtering data optimization: Combining 1000Hz high-frequency sampling outlier removal + mean filtering algorithm, invalid data caused by instantaneous jitter and environmental noise is filtered out, effectively improving the data stability in complex industrial workshop environments; (4) Fully closed-loop intelligent quality control: realizes integrated functions of production line linkage start and stop, automatic zeroing, real-time display, over-limit alarm, data curve generation, and historical traceability. No manual intervention is required, the detection coverage is 100%, the detection efficiency is improved by more than 90% compared with offline detection, the production cost and scrap rate are reduced, and it is easy to directly modify and promote on existing coating production lines. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the device for thickening dry film lubricating coating of titanium alloy wire for aerospace fasteners according to the present invention.

[0013] In the diagram: 1-Pre-coating inspection device bracket; 2-Guide device No. 1; 3-Laser meter; 4-Guide sleeve; 5-Pre-coating diameter gauge; 6-Guide device No. 2; 7-Post-coating inspection device bracket; 8-Guide device No. 3; 9-Post-coating diameter gauge; 10-Guide device No. 4; 11-Data acquisition and processing system. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, the present invention provides a device for measuring the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, comprising, from front to back along the wire conveying direction of the titanium alloy coating production line, a pre-coating inspection device bracket 1, a guide device 1 2, a laser meter 3, a guide sleeve 4, a pre-coating diameter gauge 5, a guide device 2 6, a post-coating inspection device bracket 7, a guide device 3 8, a post-coating diameter gauge 9, a guide device 4 10, and a data acquisition and processing system 11.

[0016] The pre-coating inspection device bracket 1 is arranged on the frame of the coating production system to support and fix the No. 1 guide device 2, the laser meter 3, the guide sleeve 4, the pre-coating diameter measuring instrument 5, and the No. 2 guide device 6.

[0017] Guide device 2 is installed on the pre-coating inspection device bracket 1 and is located on the far left. It is used to guide the straightened filament to be coated online.

[0018] The laser meter counter 3 is mounted on the pre-coating inspection device bracket 1 and positioned to the right of the guide device 2 (No. 1). It is used for continuous online detection of the wire's running speed and displacement. Detection accuracy: ±0.05%.

[0019] The guide sleeve 4 is installed on the bracket 1 of the pre-coating inspection device and is located on the right side of the laser meter 3. Together with the guide device 2, it works to reduce the vibration of the wire as it passes through the laser meter 3, thereby reducing the impact of wire vibration on meter counting and speed measurement, and thus ensuring the accuracy of the wire coating thickness detection.

[0020] The pre-coating diameter measuring instrument 5 is installed on the pre-coating inspection device bracket 1 and is located on the right side of the guide sleeve 4. It is used to continuously measure the diameter of the wire before coating and works together with the laser meter 3 to continuously calibrate the diameter of the wire and the position of the micro-element before coating.

[0021] The No. 2 guide device 6 is installed on the bracket 1 of the pre-coating inspection device and is located on the right side of the pre-coating diameter gauge 5. It works together with the guide sleeve 4 to stabilize the wire within the measurement range of the diameter gauge, reduce the influence of wire movement on the diameter measurement, and thus ensure the accuracy of the wire coating thickness detection.

[0022] The post-coating inspection device bracket 7 is arranged on the frame of the rear belt traction machine to support and fix the No. 3 guide device 8, the post-coating diameter gauge 9, the No. 4 guide device 10, and the data acquisition and processing system 11.

[0023] The No. 3 guiding device 8 is installed on the post-coating inspection device bracket 7 and is located on the far left. It is used to continuously guide the filament to be coated online.

[0024] The post-coating diameter gauge 9 is mounted on the post-coating inspection device bracket 7 and is located on the right side of the guide device 8. It is used to continuously measure the diameter of the coated wire online and works together with the laser meter 3 to continuously calibrate the diameter of the coated wire and the position of the micro-element diameter online.

[0025] The No. 4 guide device 10 is installed on the bracket 7 of the post-coating inspection device and is located on the right side of the post-coating diameter gauge 9. It works together with the No. 3 guide device 8 to stabilize the wire within the measurement range of the diameter gauge, reduce the impact of wire movement on the diameter measurement, and thus ensure the accuracy of the wire coating thickness detection.

[0026] The data acquisition and processing system 11 is mounted on the post-coating inspection device bracket 7 and integrated into the industrial touch screen all-in-one machine. The pre-coating diameter gauge 5, post-coating diameter gauge 9, and laser meter counter 3 are connected to the software via Ethernet. The data acquisition and processing system 11 can achieve the following functions: (1) Real-time outer diameter readings of the diameter gauge (including X / Y / Z axes, average value, and ellipticity) and real-time readings of the laser meter 3. (2) Display the average outer diameter fluctuation trend graph and thickness value of the two diameter gauges respectively; set the target value and upper and lower limits of the outer diameter of the diameter gauges, and trigger an audible and visual alarm when the tolerance is exceeded. (3) Store the Datalog data log file of each batch of processed materials, save the data according to the set collection cycle, including the X / Y / Z axis values ​​of the outer diameter of the two diameter gauges at the corresponding positions before and after coating, the average value, the data of the laser meter 3, and the calculated coating thickness value, etc.

[0027] A method for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, achieved using the aforementioned device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, specifically includes the following steps: S1, along the wire conveying direction of the titanium alloy coating production line, is arranged from front to back as follows: pre-coating inspection device bracket, No. 1 guide device, laser meter counter, guide sleeve, pre-coating diameter gauge, No. 2 guide device, post-coating inspection device bracket, No. 3 guide device, post-coating diameter gauge, No. 4 guide device, and data acquisition and processing system. S2, define the distance from the center of the laser meter to the center of the pre-coating diameter measuring instrument as L1, the wire length between the center of the pre-coating diameter measuring instrument and the center of the post-coating diameter measuring instrument as L2, and the distance between the center of the laser meter and the longest part of the wire as L3. S3. Once the conditions for one-click coating are met, set the coating speed, click the one-click start button, and the coating production line will start running. At the same time, after clicking the one-click start button, the laser meter counter value is reset to zero, and the length of the wire is measured. Simultaneously, the data acquisition and processing system begins to collect the length information from the laser meter counter. When the length reaches L1, the electrical control system begins to collect the diameter data information from the pre-coating diameter measuring instrument. The diameter measuring instrument has a refresh rate of 1000 Hz and a collection period of 100 milliseconds. Ten data samples are collected within 1 second. Invalid data is removed from the ten data samples, and the average value is taken to finally generate the value Dn of the diameter within the length and generate a table. S4, when the length data of the laser meter reaches L1+L2, the electronic control system begins to collect the diameter data information D of the post-coating diameter measuring instrument. m1 At the same time, the diameter data of the pre-coating diameter gauge at the same moment is processed and defined as D. m2 The final output is a thickness. μm, and display this value on the screen.

[0028] This invention employs polyurethane flexible wheels in each guiding device, avoiding damage to the titanium alloy wire while improving the equipment's vibration resistance. Through station spacing calibration and displacement triggering mechanisms, it solves the problem of dynamic production data timing misalignment. Coupled with high-frequency sampling and outlier filtering algorithms, it achieves high-precision detection of ultra-thin coatings. This invention is adaptable to online full-coverage detection of dry film lubricated coatings on titanium alloy wires, solving problems such as easy material damage, poor vibration resistance, low detection accuracy, and weak automation in traditional equipment. Simultaneously, it features a dedicated detection method, realizing a one-button linkage start / stop, intelligent alarm, and data traceability integrated closed-loop data acquisition and processing system. It boasts high detection efficiency and strong stability, making it suitable for large-scale mass production of coated wires for aerospace titanium alloys, and possesses broad engineering application prospects.

[0029] Example 1 I. Configuration Parameters of the Example This embodiment is adapted to Φ5.0mm TC4 titanium alloy wire, with a target coating thickness of 4-8μm, a production line operating speed of 4.0m / min, and a conventional open industrial environment in the workshop, retaining interference conditions such as equipment vibration and airflow disturbance.

[0030] II. Structural Assembly Implementation (1) The pre-coating inspection device bracket 1 is arranged on the frame of the coating production system to support and fix the No. 1 guide device 2, laser meter 3, guide sleeve 4 and pre-coating diameter measuring instrument 5, etc.

[0031] (2) The No. 1 guiding device 2 is installed on the pre-coating inspection device bracket 1 and is located on the far left. It is used to guide the straightened filament to be coated online.

[0032] (3) The laser meter 3 is installed on the bracket 1 of the pre-coating inspection device and is located on the right side of the No. 1 guide device 2. It is used to continuously detect the running speed and displacement of the wire material online. The detection accuracy is ±0.05%.

[0033] (4) The guide sleeve 4 is installed on the bracket 1 of the pre-coating detection device and is set on the right side of the laser meter 3. Together with the No. 1 guide device 2, it works to reduce the shaking of the wire when it passes through the laser meter, reduce the impact of the wire vibration on metering and speed measurement, and thus ensure the accuracy of the wire coating thickness detection.

[0034] (5) The pre-coating diameter measuring instrument 5 is installed on the pre-coating detection device bracket 1 and is set on the right side of the guide sleeve 4. It is used to continuously measure the diameter of the wire before coating and works together with the laser meter 3 to continuously calibrate the diameter of the wire and the position of the micro-element before coating.

[0035] (6) The No. 2 guide device 6 is installed on the bracket 1 of the pre-coating inspection device and is set on the right side of the pre-coating diameter gauge 5. It works together with the guide sleeve 4 to stabilize the wire within the measurement range of the pre-coating diameter gauge 6, reduce the influence of wire movement on the diameter measurement, and thus ensure the accuracy of the wire coating thickness detection.

[0036] (7) The post-coating inspection device bracket 7 is arranged on the frame of the rear belt traction machine to support and fix the No. 3 guide device 8, the post-coating diameter measuring instrument 9, the No. 4 guide device 10 and the data acquisition and processing system 11, etc.

[0037] (8) The No. 3 guiding device 8 is installed on the support 7 of the post-coating inspection device and is located on the far left. It is used to continuously guide the filament to be coated online.

[0038] (9) The post-coating diameter measuring instrument 9 is installed on the post-coating detection device bracket 7 and is set on the right side of the No. 3 guide device 8. It is used to continuously measure the diameter of the coated wire online and works together with the laser meter 3 to continuously calibrate the diameter of the coated wire and the position of the micro-element diameter online.

[0039] (10) The No. 4 guide device 10 is installed on the bracket 7 of the post-coating inspection device and is set on the right side of the post-coating diameter gauge 9. It works together with the No. 3 guide device 8 to stabilize the wire within the measurement range of the diameter gauge, reduce the influence of wire movement on the diameter measurement, and thus ensure the accuracy of the wire coating thickness detection.

[0040] (11) All signal lines in the data acquisition and processing system 11 are shielded twisted pair cables to avoid electromagnetic interference in the workshop; the sound and light alarm is installed on the top of the equipment to facilitate long-distance identification of alarm signals.

[0041] III. Implementation of Testing Procedures Step 1: After manual threading, fine-tune the guiding device to ensure smooth wire feeding without bending or surface indentations. Step 2: Measure and calibrate L1=223.5mm and L2=6607.8mm, and input the two sets of parameters into the data acquisition and processing system; Step 3: Set the production line speed to 1.5m / min, start with one key, and all equipment on the line will be reset and started synchronously; Step 4: The laser meter 3 collects the displacement in real time. When the wire reaches 223.5mm, the diameter of the substrate before coating is collected; when it reaches 6831.3mm, the outer diameter after coating is collected simultaneously. Step 5: The system samples 10 sets per second, automatically removes the largest and smallest outliers, takes the average of the remaining 8 sets of data, calculates the coating thickness, and plots the curve in real time. Step 6: The system uses 4-8μm as the acceptable range. If the tolerance is exceeded, an audible and visual alarm will be triggered immediately, and the alarm data will be automatically archived.

[0042] IV. Implementation Results This embodiment operates continuously for 24 hours without failure, with no scratches or indentations on the wire surface; the coating thickness fluctuation is ≤±2μm, and the detection accuracy meets the quality control requirements for 4~8μm ultra-thin coatings; the data timing matching accuracy is 100%; the alarm response time is ≤80ms, which fully meets the industrial mass production testing needs of high-end titanium alloy wire.

Claims

1. A method for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, characterized in that, Includes the following steps: S1, along the wire conveying direction of the titanium alloy coating production line, is arranged from front to back as follows: pre-coating inspection device bracket, No. 1 guide device, laser meter counter, guide sleeve, pre-coating diameter gauge, No. 2 guide device, post-coating inspection device bracket, No. 3 guide device, post-coating diameter gauge, No. 4 guide device, and data acquisition and processing system. S2, define the distance from the center of the laser meter to the center of the pre-coating diameter measuring instrument as L1, the wire length between the center of the pre-coating diameter measuring instrument and the center of the post-coating diameter measuring instrument as L2, and the distance between the center of the laser meter and the longest part of the wire as L3. S3. Once the conditions for one-click coating are met, set the coating speed, click the one-click start button, and the coating production line will start running. At the same time, after clicking the one-click start button, the laser meter counter value is reset to zero, and the length of the wire is measured. Simultaneously, the data acquisition and processing system begins to collect the length information from the laser meter counter. When the length reaches L1, the electrical control system begins to collect the diameter data information from the pre-coating diameter measuring instrument. The diameter measuring instrument has a refresh rate of 1000 Hz and a collection period of 100 milliseconds. Ten data samples are collected within 1 second. Invalid data is removed from the ten data samples, and the average value is taken to finally generate the value Dn of the diameter within the length and generate a table. S4, when the length data of the laser meter reaches L1+L2, the electronic control system begins to collect the diameter data information D of the post-coating diameter measuring instrument. m1 At the same time, the diameter data of the pre-coating diameter gauge at the same moment is processed and defined as D. m2 The final output is a thickness. μm, and display this value on the screen.

2. A device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners, characterized in that, The method for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners as described in claim 1 includes a pre-coating detection device bracket, a No. 1 guide device, a laser meter, a guide sleeve, a pre-coating diameter gauge, a No. 2 guide device, a post-coating detection device bracket, a No. 3 guide device, a post-coating diameter gauge, a No. 4 guide device, and a data acquisition and processing system. The pre-coating inspection device bracket is arranged on the frame of the coating production system; the No. 1 guide device is installed on the pre-coating inspection device bracket and located on the far left; the laser meter is installed on the pre-coating inspection device bracket and located to the right of the No. 1 guide device; the guide sleeve is installed on the pre-coating inspection device bracket and located to the right of the laser meter; the pre-coating diameter gauge is installed on the pre-coating inspection device bracket and located to the right of the guide sleeve; the No. 2 guide device is installed on the pre-coating inspection device bracket and located to the right of the pre-coating diameter gauge; the post-coating inspection device bracket is arranged on the frame of the rear belt traction machine; the No. 3 guide device is installed on the post-coating inspection device bracket and located on the far left; the post-coating diameter gauge is installed on the post-coating inspection device bracket and located to the right of the No. 3 guide device; the No. 4 guide device is installed on the post-coating inspection device bracket and located to the right of the post-coating diameter gauge; the data acquisition and processing system is installed on the post-coating inspection device bracket and integrated into an industrial touch screen all-in-one machine.

3. The device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners according to claim 1, characterized in that, The guide sleeve, together with the No. 1 guide device, works together to reduce the vibration of the wire as it passes through the laser meter counter, thereby reducing the impact of wire vibration on meter counting and speed measurement.

4. The device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners according to claim 1, characterized in that, The pre-coating diameter measuring instrument performs online continuous measurement of the wire diameter before coating, and works together with the laser meter to continuously calibrate the wire diameter and micro-element diameter position before coating.

5. The device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners according to claim 3, characterized in that, The No. 2 guiding device, together with the guiding sleeve, works to stabilize the wire within the measuring range of the diameter measuring instrument, reducing the impact of wire movement on diameter measurement.

6. The device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners according to claim 1, characterized in that, The post-coating diameter measuring instrument performs online continuous measurement of the diameter of the coated filament and works together with the laser meter to continuously calibrate the diameter of the coated filament and the position of the micro-element diameter online.

7. The device for detecting the thickness of dry film lubricating coating on titanium alloy wire for aerospace fasteners according to claim 1, characterized in that, The No. 4 guiding device works together with the No. 3 guiding device to stabilize the wire within the measuring range of the diameter measuring instrument, reducing the impact of wire movement on diameter measurement.

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