Metal coating liquid component detection device and method

Abstract

The invention relates to the technical field of metal coating liquid component detection, and particularly discloses a metal coating liquid component detection device and method. Comprising an electroplating tank, a stirring assembly arranged in the electroplating tank, a viscosity detection assembly used for monitoring metal coating liquid in real time, a sampling assembly used for uniformly sampling the metal coating liquid, and a complexing agent detection assembly used for detecting a metal coating liquid sample, the complexing agent detection assembly comprises a detection box, a titration piece, a ray generator and a ray receiving sensor, the titration piece can slowly dropwise add a barium nitrate solution, the ray generator can generate ray light, the ray light penetrates through the metal coating liquid sample to be received by the ray receiving sensor, and if citric acid does not exist in the metal coating liquid sample and the metal coating liquid sample becomes turbid, the detection box is determined to be a detection box. Therefore, the ray receiving sensor is influenced to receive ray light. The method has the effect of remarkably improving the detection efficiency and the detection real-time performance.

Description

Technical Field

[0001] This application relates to the technical field of metal coating solution composition detection, and particularly to a metal coating solution composition detection device and method. Background Art

[0002] At present, metal coating technologies are widely used in fields such as electronics, aerospace, and automotive manufacturing to improve the anti-corrosion performance, electrical conductivity, and aesthetics of substrates. In coating solutions, nickel coating solutions are widely adopted due to their excellent electrical conductivity and corrosion resistance. The main components of nickel coating solutions include nickel sulfate, complexing agents, solvents, acid-base regulators, etc. Among them, citric acid is usually used as the complexing agent, and its function is to stabilize the nickel ion concentration in the plating solution by complexing metal ions, prevent precipitation formation, and improve the coating quality.

[0003] During the production and use of metal coating solutions, it is often necessary to monitor and analyze the metal ion concentration, acidity / alkalinity, additives, and other chemical components in the liquid to ensure the stability of the coating process and the quality of the finished products. Traditional composition detection methods, such as atomic absorption spectrometry, titration, electrochemistry analysis, etc., have been widely used in the analysis of metal coating solutions and have ensured the quality control of metal coating solutions to a certain extent.

[0004] However, in the actual production process, the metal ion concentration, acidity / alkalinity, and other components in the plating solution can be effectively monitored by traditional detection methods. However, as the plating process progresses, the content of citric acid as the complexing agent gradually decreases or decomposes, resulting in a decline in the performance of the plating solution. At the same time, as a key complexing agent, the concentration of citric acid directly affects the stability of the plating solution and the quality of the coating. However, due to its complex nature and easy interaction with other components, and the content of citric acid itself is not very high relative to the overall coating solution, traditional detection means are difficult to directly and accurately determine its content. Summary of the Invention

[0005] To facilitate real-time composition detection of nickel coating solutions, especially to detect the remaining amount of complexing agents in nickel coating solutions after a period of electroplating processing to determine whether the nickel coating solution needs to be re-prepared, significantly improving the detection efficiency and real-time performance of detection.

[0006] In a first aspect, a metal coating solution composition detection device provided by this application adopts the following technical solutions: A metal coating solution composition detection device includes: An electroplating cell, on which a controller is provided; Stirring assembly, the stirring assembly includes a stirring shaft and a stirring drive, the stirring shaft is arranged in the electroplating bath, stirring blades are arranged on the stirring shaft, the stirring drive is fixedly arranged on the electroplating bath, and the stirring drive drives the stirring shaft to rotate, so as to uniformly stir the metal coating solution in the electroplating bath; Viscosity detection assembly, the viscosity detection assembly is arranged on the stirring blade, and the viscosity detection assembly detects the viscosity of the metal coating solution in real time according to the resistance received by the stirring blade; Sampling assembly, the sampling assembly is arranged on one side of the electroplating bath, and the sampling assembly can uniformly sample in the electroplating bath; Complexing agent detection assembly, the complexing agent detection assembly includes a detection box, a titrator, a ray generator and a ray receiving sensor, the detection box is arranged on one side of the electroplating bath, the sampling assembly is communicated with the detection box, the titrator is arranged on the detection box, the titrator drops barium nitrate solution into the detection box, the ray generator and the receiving sensor are oppositely arranged on both sides of the detection box, when the barium nitrate solution is dropped in, it preferentially reacts with citric acid to form a complex, and the content of the complexing agent is detected by monitoring the change of the ray transmission intensity received by the receiving sensor.

[0007] By adopting the above technical solutions, firstly, dynamic viscosity detection is carried out on the metal coating solution. The viscosity detection assembly on the stirring blade senses the change of the viscosity of the coating solution in real time. As the electroplating process progresses, impurities will gradually accumulate in the metal coating solution, and along with its own gradual consumption, the viscosity of the metal coating solution will increase. Therefore, the consumption of the metal coating solution can be effectively monitored according to the viscosity change. Taking the initial viscosity as the reference value, the dynamic trend of the viscosity is accurately monitored to ensure the physical stability of the coating solution during the whole electroplating process, and effectively avoid coating defects caused by excessive consumption of the metal coating solution and excessive accumulation of impurities; the complexing agent detection assembly uses the complexing reaction of barium nitrate solution and citric acid to directly detect whether the coating solution sample becomes turbid and the consumption of barium nitrate solution when it becomes turbid, so as to judge the remaining amount of the complexing agent in the sample, and then carry out targeted operations on the metal coating solution in the electroplating bath. In this way, compared with the traditional method that requires complicated detection operations in the experimental environment to obtain the detection results, the above detection method and detection device can quickly and accurately detect the content of citric acid, and carry out real-time monitoring on the metal coating solution, significantly improving the detection efficiency and real-time performance, effectively avoiding resource waste, reducing production costs, and at the same time improving the process economy and environmental protection; in addition, the controller coordinates the stirring assembly, the viscosity detection assembly, the sampling assembly and the complexing agent detection assembly to realize a fully automated detection process, reduce human operation intervention, and improve the detection stability and reliability.

[0008] Optionally, it further includes a viscosity detection component. The viscosity detection component includes a piston cylinder and a display tube. The piston cylinder is arranged on the stirring blade. A piston block is slidably arranged in the piston cylinder. The piston block divides the piston cylinder into two independent chambers, which are respectively set as an expansion and contraction chamber and a compression chamber. The compression chamber is filled with hydraulic oil. A piston rod is fixedly arranged on one side of the piston block located in the expansion and contraction chamber. The piston rod slidably penetrates through one end of the piston cylinder. One end of the piston cylinder away from the piston rod is rotatably connected to the stirring shaft, and one end of the piston rod away from the piston cylinder is rotatably connected to the stirring blade. The display tube is arranged on the outer wall of the electroplating bath. One end of the display tube is communicated with the compression chamber. A part of the hydraulic oil in the compression chamber will enter the display tube. When the stirring shaft drives the stirring blade to rotate in the electrolytic cell, the stirring blade deflects on the stirring shaft due to the viscosity of the metal coating solution, so as to drive the piston block to slide in the piston cylinder through the piston rod, and then the display tube displays the real-time change of the viscosity of the metal coating solution.

[0009] By adopting the above technical solution, the viscosity detection component including the piston cylinder, the piston block and the display tube is used to realize the real-time and accurate detection of the viscosity of the metal coating solution. By using the mechanical deflection of the stirring blade caused by the viscosity change during the stirring process and combining with the stable transmission of the fluid, the dynamic viscosity change of the liquid is converted into the intuitive change of the liquid column height in the display tube. It has high sensitivity and fast response. And through the setting of the display tube, the operator can directly read the data, with simple operation and no signal conversion delay, reducing the operation difficulty of the traditional complex detection method and significantly improving the detection efficiency in the industrial scenario. In addition, due to the non-destructive detection characteristic of this method, the detection process avoids direct contact with the coating solution, thus ensuring the integrity of the coating solution and preventing pollution or property change.

[0010] Optionally, a transfer pipe is further arranged between the display tube and the piston cylinder. A fixed seat is fixedly arranged on the electroplating bath. A communication groove is opened at one end of the stirring shaft extending out of the electroplating bath. One end of the transfer pipe is rotatably arranged in the communication groove. The communication groove is communicated with one end of the transfer pipe. The other end of the transfer pipe is communicated with the display tube. The transfer pipe and the communication groove are both filled with hydraulic oil. A drain pipe is fixedly arranged at one end of the piston cylinder close to the stirring shaft. One end of the drain pipe is communicated with the compression chamber, and the other end of the drain pipe is communicated with the communication groove.

[0011] By adopting the above technical solution, the set transfer tube can ensure the smooth transmission of hydraulic oil during the stirring process, which can not only ensure the synchronization of the viscosity component and the stirring component, but also avoid motion interference between the two, thereby ensuring that the flow and distribution of the hydraulic oil are balanced among the various parts in the system, ensuring that the measurement results are more stable and reliable, thereby enhancing the accuracy of the entire detection system.

[0012] Optionally, a connecting tube is further provided between the display tube and the transfer tube, one end of the connecting tube is connected to one end of the display tube, and the other end of the connecting tube is connected to an end of the transfer tube away from the stirring shaft, the diameter of the connecting tube is much smaller than the diameter of the display tube, and the display tube is slidably provided with a sliding plug, the sliding plug is located at one end of the display tube close to the connecting tube, a sliding portion is fixedly provided at one end of the sliding plug, and the sliding portion is slidably provided in the connecting tube, a visual window is provided on the display tube, and a scale is provided on the visual window, and when the stirring blade drives the piston block to slide in the piston cylinder, the sliding plug slides in the display tube, thereby realizing that the real-time change of the viscosity of the metal plating liquid is displayed through the display tube.

[0013] By adopting the above technical solution, the setting of the connecting tube utilizes the Bernoulli principle in fluid mechanics. By setting the diameter of the connecting tube to be much smaller than the diameter of the display tube, the fluid pressure change at one end of the stirring blade is effectively enhanced. Through the sliding plug and the scale on the display tube, not only can the display tube accurately and in real time reflect the viscosity change of the metal plating liquid, but the operator can also obtain the change information of the liquid viscosity intuitively and conveniently. In addition, the real-time feedback function of the display tube enables the operator to quickly understand the fluctuation of the viscosity and adjust the production parameters in time according to the changes to ensure that the plating liquid is always kept in the best condition.

[0014] Optionally, a light-transmitting plate is fixedly provided at one end of the sliding plug away from the sliding portion, and the light-transmitting plate is set as a rectangular plate, and the light-transmitting plate is equally divided into two color display areas along the length direction of the light-transmitting plate, and the two color display areas are set to green and red respectively, and the green color display area is located in the red color display area, and a cold light lamp and a color sensor are also provided on the display tube, and the cold light lamp and the color sensor are symmetrically distributed on the display tube, and the cold light lamp and the color sensor are both penetrated on the display tube, and the color sensor is electrically connected to the controller, and when the piston block slides in the piston cylinder, the sliding plug lifts the light-transmitting plate, and the cold light lamp will map lights of different colors through different color display areas on the light-transmitting plate, and the color sensor can receive these lights of different colors.

[0015] By adopting the above technical solution, with the use of the provided light-transmitting plate, the change in the viscosity of the metal coating solution can be visually demonstrated. When the stirring blade drives the sliding plug to move, the color display area on the light-transmitting plate will change color with the change in viscosity, thereby providing clear visual feedback to help the operator monitor the viscosity of the metal coating solution in real time. Moreover, this real-time color change feedback not only provides quantitative information about the viscosity but also can automatically trigger the reaction of the control system through the color change. When the color sensor detects red light, it can automatically start the controller and drive the pressure pump to take a sample. This not only enables the operator to quickly obtain the real-time changes of the metal coating solution but also ensures the accuracy and real-time nature of the detection operation of the metal coating solution, avoiding human errors. Additionally, the color feedback mechanism provides higher visibility and operational convenience, ensuring that the operator can quickly identify key changes.

[0016] Optionally, the sampling assembly further includes a lifting member, which includes a lifting motor, a lead screw, a sliding seat, and a connecting plate. An installation seat is fixedly provided on the electroplating bath. The lifting motor is fixedly provided on the installation seat and is electrically connected to the controller. The lead screw is rotatably arranged on the installation seat, and one end of the output shaft of the lifting motor is fixedly connected to one end of the lead screw. The sliding seat is sleeved on the lead screw and is in threaded connection with the lead screw. One end of the connecting plate is fixedly connected to the sliding seat, and the other end of the connecting plate is fixedly connected to the end of the sampling tube away from the electroplating bath. When the lifting motor drives the lead screw to rotate, the sliding seat drives the sampling tube to reciprocally slide along the height direction of the electroplating bath through the connecting plate.

[0017] By adopting the above technical solution, the provided lifting member is used to drive the sampling tube to move along the height direction of the electroplating bath. This not only further disturbs the metal coating solution on the basis of the stirring assembly but also enables the position of the sampling tube in the electroplating bath to be changed arbitrarily, thereby ensuring the uniformity of sampling.

[0018] Optionally, the sampling assembly further includes an automatic dilution member, which includes a self-suction pipe, a liquid injection pipe, and a water tank. An installation frame is arranged on one side of the electroplating bath. The pressure pump, the self-suction pipe, and the water tank are all arranged on the installation frame. One end of the self-suction pipe is communicated with the liquid outlet end of the pressure pump, and the other end of the self-suction pipe is communicated with the detection box. A contraction section is arranged in the middle of the self-suction pipe along its length direction, and the pipe diameter at the contraction section is much smaller than the pipe diameters at both ends of the self-suction pipe. The liquid injection pipe is fixedly arranged on the self-suction pipe. One end of the liquid injection pipe is communicated with the contraction section, and the other end of the liquid injection pipe is communicated with the water tank. When the pressure pump takes a sample from the electroplating bath, the self-suction pipe will automatically suck the water in the water tank to dilute the metal coating solution sample.

[0019] By adopting the above technical scheme, when the sample drawn by the pressure pump flows through the self-priming tube, the special structure of the self-priming tube is used to realize automatic water absorption to dilute the sample. According to Bernoulli's principle, when the fluid flows in the pipeline, the diameter of the pipeline gradually decreases, the flow rate of the fluid will gradually increase, and the fluid pressure will decrease. Therefore, when the sample flows through the contraction section, a low-pressure area will be formed at the contraction section, thereby automatically sucking in the water in the water tank, and the amount of suction is determined according to the setting of the self-priming tube. Therefore, the flow rate of the diluent can be controlled precisely and targeted to ensure that the amount of liquid diluted each time is moderate, avoiding errors caused by artificial dilution, and ensuring the accuracy of subsequent detection and the stability of the sample. At the same time, in this process, the operator only needs to monitor without tedious manual operations, which significantly reduces labor intensity and improves production efficiency.

[0020] Optionally, the sampling assembly includes a pressure pump and a sampling tube, the pressure pump is arranged on one side of the electroplating pool, one end of the sampling tube is connected to the liquid inlet end of the pressure pump, and the other end of the sampling tube extends into the electroplating pool, and the sampling tube can perform uniform sampling in the electroplating pool; a filter is provided on the sampling tube, and the filter is detachably arranged at one end of the sampling tube, and when the sampling tube samples the metal plating liquid, the filter can filter the sampled metal plating liquid.

[0021] By adopting the above technical solution, the pressure pump and sampling tube are set to achieve uniform sampling in the electroplating pool, further improving the representativeness of the detection and the accuracy of the data; the filter element is set to pre-filter the extracted samples to remove solid impurities in the metal plating liquid, thereby reducing interference with subsequent component detection and ensuring the accuracy of the detection.

[0022] Optionally, the titration component includes a titration pot and a burette, a liquid level sensor is arranged in the detection box, the liquid level sensor is electrically connected to the controller, the titration pot is arranged on the detection box, barium nitrate solution is injected into the titration pot, one end of the burette is connected to the titration pot, and the other end of the burette is connected to the detection box, the titration pot is connected to the detection box through the burette, a first solenoid valve is arranged on the burette, and the first solenoid valve is electrically connected to the controller.

[0023] By adopting the above technical solution, the titration pot, the burette and the first solenoid valve can ensure the precise control of the liquid volume during the titration process, avoiding the influence of human errors on the experimental results. The liquid level sensor can ensure that the amount of sample is the same each time it is tested, ensuring the consistency of the test.

[0024] On the other hand, the present application provides a method for detecting the composition of a metal plating liquid, comprising the following steps: S1, coating liquid viscosity detection, the metal coating liquid is injected into the electroplating tank, the detection device is started to stir the metal coating liquid, and the viscosity of the metal coating liquid is detected during the stirring process to obtain a first viscosity P1, and P1 is recorded as a reference value; S2, sampling. The detection device continuously stirs the metal plating liquid during the entire electroplating process, and performs real-time viscosity detection on the metal plating liquid to obtain the nth viscosity Pn. When Pn is greater than P1 and Pn is less than 1.2 times of P1, the detection device samples the metal plating liquid and dilutes the sampled metal plating liquid. S3, complexing agent detection, the detection device will slowly add barium nitrate solution to the metal plating liquid sample, and perform light transmittance detection on the metal plating liquid sample; if the light transmittance of the metal plating liquid sample is significantly reduced in the initial stage of the detection, it means that the citric acid content is insufficient; S4. Data analysis: According to the barium nitrate solution added in S3, the content of citric acid in the metal plating solution sample is obtained to determine whether to reconfigure the plating solution.

[0025] By adopting the above technical solution, it is only necessary to monitor the viscosity of the metal plating liquid in real time. Once the viscosity increases and exceeds the threshold, the sampling and dilution steps will be automatically started. This can not only avoid the tediousness and errors of manual sampling, but also ensure the uniformity and accuracy of the sample, providing a reliable basis for subsequent analysis, thereby significantly improving the accuracy and efficiency of detection and reducing production costs.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. First, the metal plating liquid is subjected to dynamic viscosity detection. The viscosity detection component on the stirring blade senses the change of viscosity in real time, accurately monitors the dynamic trend of viscosity, and effectively avoids the coating defects caused by excessive consumption of metal plating liquid and excessive accumulation of impurities. The complexing agent detection component is used to detect whether the plating liquid sample is turbid and the consumption of barium nitrate solution when turbidity occurs, so as to judge the remaining amount of complexing agent in the sample, and then perform targeted operations on the metal plating liquid. In this way, not only the detection efficiency and real-time detection are significantly improved, and the waste of resources is effectively avoided, but also the process economy and environmental protection are improved. In addition, the controller is used to control the coordinated operation between the components to realize the fully automated detection and adjustment process, reduce human intervention, and improve the detection stability and reliability. 2. The viscosity detection components including the piston cylinder, piston block and display tube are used to realize real-time and accurate monitoring of the viscosity of the metal plating liquid. The mechanical deflection of the stirring blade caused by the viscosity change during the stirring process is used to convert the dynamic viscosity change of the liquid into an intuitive change in the height of the liquid column in the display tube. The sensitivity is high and the response is fast. The display tube allows the operator to read the data directly. The operation is simple and there is no signal conversion delay, which reduces the difficulty of operating traditional complex detection methods and significantly improves the detection efficiency in industrial scenarios. 3. The setting of the connecting tube utilizes the Bernoulli principle in fluid mechanics. The setting of the connecting tube effectively enhances the change of fluid pressure at one end of the stirring blade. Through the sliding plug, the scale on the display tube and the light-transmitting plate, not only the display tube can accurately and real-timely reflect the viscosity change of the metal plating liquid, ensuring the accuracy and real-time performance of the metal plating liquid detection operation, but also enables the operator to intuitively and conveniently obtain the change information of the liquid viscosity, and timely adjust the production parameters according to the changes to ensure that the plating liquid is always kept in the best state; 4. When the sample drawn by the pressure pump flows through the self-priming tube, the special structure of the self-priming tube is used to automatically absorb water to dilute the sample, ensuring that the amount of liquid for each dilution is appropriate, avoiding errors caused by artificial dilution, and ensuring the accuracy of subsequent testing and the stability of the sample. At the same time, during this process, the operator only needs to monitor without tedious manual operations, which significantly reduces labor intensity and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the metal plating liquid composition detection device in the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the overall structure of the electroplating cell in the embodiment of the present application.

[0029] Figure 3 It is a partial cross-sectional schematic diagram of the stirring shaft in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the overall structure of the stirring assembly in the embodiment of the present application.

[0031] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0032] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a display tube in an embodiment of the present application.

[0033] Figure 7 It is a schematic diagram of the overall structure of the sampling component in the embodiment of the present application.

[0034] Figure 8 yes Figure 2 Enlarged schematic diagram of part A.

[0035] Figure 9 It is a schematic diagram of the overall structure of the complexing agent detection component in the embodiment of the present application.

[0036] Reference numerals: 1, electroplating cell; 11, controller; 12, fixing seat; 13, mounting seat; 14, mounting frame; 15, supporting seat; 2. stirring assembly; 21. stirring shaft; 211. connecting groove; 212. hinged plate; 22. stirring driving member; 23. stirring blade; 24. transmission member; 241. driving gear; 242. driven gear; 3. Viscosity detection assembly; 31. Piston cylinder; 311. Expanding and contracting chamber; 312. Compression chamber; 313. Discharge pipe; 32. Display tube; 321. Visual window; 33. Piston block; 331. Piston rod; 34. Transfer tube; 35. Connecting tube; 36. Sliding plug; 361. Sliding part; 362. Translucent plate; 37. Cold light lamp; 38. Color sensor; 39. Elastic member; 4. Sampling assembly; 41. Pressure pump; 42. Sampling tube; 43. Lifting component; 431. Lifting motor; 432. Screw rod; 433. Sliding seat; 434. Connecting plate; 44. Automatic dilution component; 441. Self-priming tube; 4411. Contraction section; 442. Liquid injection tube; 443. Water tank; 45. Filter component; 5. Complexing agent detection component; 51. Detection box; 52. Titration piece; 521. Titration pot; 522. Burette; 523. First solenoid valve; 53. Radiation generator; 54. Radiation receiving sensor; 55. Liquid level sensor. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-9 This application is described in further detail.

[0038] The present application discloses a method for detecting the composition of a metal plating liquid, comprising the following steps: S1, coating liquid viscosity detection, the metal coating liquid is injected into the electroplating tank 1, the detection device is started to stir the metal coating liquid, and the viscosity of the metal coating liquid is detected during the stirring process, and the first viscosity P1 is obtained after stirring, and P1 is recorded as the reference value; S2, sampling. The detection device continuously stirs the metal plating liquid during the entire electroplating process, and performs real-time viscosity detection on the metal plating liquid to obtain the nth viscosity Pn. When Pn is greater than P1 and Pn is less than 1.2 times of P1, the detection device samples the metal plating liquid and dilutes the sampled metal plating liquid. S3, complexing agent detection, the detection device will slowly add barium nitrate solution to the metal plating liquid sample, and perform light transmittance detection on the metal plating liquid sample; if the light transmittance of the metal plating liquid sample is significantly reduced in the initial stage of the detection, it means that the citric acid content is insufficient; S4. Data analysis: According to the barium nitrate solution added in S3, the content of citric acid in the metal plating solution sample is obtained to determine whether to reconfigure the plating solution.

[0039] Reference Figure 1 and Figure 2 The metal plating liquid component detection device in steps S1-S3 includes an electroplating pool 1, a stirring component 2, a viscosity detection component 3, a sampling component 4 and a complexing agent detection component 5. The stirring component 2 is installed on the electroplating pool 1, the viscosity detection component 3 is installed on the stirring component 2, the sampling component 4 is installed on one side of the electroplating pool 1, and the complexing agent detection component 5 is installed on one side of the sampling component 4.

[0040] The electroplating pool 1 serves as the working basis of the electroplating process, and a controller 11 is fixedly arranged on the outer wall of the electroplating pool 1; the stirring component 2 can continuously stir the metal plating liquid in the electroplating pool 1 to ensure the uniformity of the metal plating liquid in real time; the viscosity detection component 3 can detect the viscosity of the plating liquid when the stirring component 2 is stirring the metal plating liquid, and can display the viscosity of the metal plating liquid in real time; the sampling component 4 can uniformly sample the plating liquid in the electroplating pool 1, and the sampling component 4 can also automatically dilute the sampled metal plating liquid in equal proportion; the complexing agent detection component 5 can perform complexing agent detection on the diluted metal plating liquid sample.

[0041] Reference Figure 3 and Figure 4 In the embodiment of the present application, the stirring assembly 2 includes a stirring shaft 21, a stirring blade 23, a stirring drive member 22 and a transmission member 24. One end of the stirring shaft 21 is rotatably penetrated on the inner bottom wall of the electroplating pool 1. Four groups of hinged plates 212 are fixed on the stirring shaft 21. The four groups of hinged plates 212 are distributed in a circle along the stirring shaft 21. The stirring blade 23 is arranged in a rectangular shape. A hinge is installed on the stirring blade 23. The stirring blade 23 is rotatably arranged on the hinged plate 212 through the hinge. Four groups of stirring blades 23 are also arranged.

[0042] The stirring drive member 22 can be set as a servo motor, which is electrically connected to the controller 11. A "door"-shaped support seat 15 is fixed on the outer bottom wall of the electroplating pool 1. The stirring drive member 22 is fixed on the support seat 15. The stirring drive member 22 drives the stirring shaft 21 to rotate through the transmission member 24.

[0043] The transmission member 24 includes a driving gear 241 and a driven gear 242. The driving gear 241 is fixedly connected to the output end of the stirring driving member 22. The driven gear 242 is fixedly sleeved on the end of the stirring shaft 21 close to the electroplating pool 1. The driven gear 242 is located on the outer bottom wall of the electroplating pool 1. The driven gear 242 is meshed with the driving gear 241. The stirring driving member 22 drives the driving gear 241 to rotate, and the driving gear 241 drives the driven gear 242 to rotate, thereby rotating the stirring shaft 21.

[0044] Reference Figure 4 , Figure 5 and Figure 6 In the embodiment of the present application, the viscosity detection component 3 includes a piston cylinder 31, a piston block 33, an elastic member 39, a transfer tube 34, a connecting tube 35, a display tube 32, a sliding plug 36, a cold light lamp 37 and a color sensor 38. The piston cylinder 31 is arranged on the stirring blade 23, and the piston block 33 is slidably arranged in the piston cylinder 31. The piston block 33 and the piston cylinder 31 are sealed. The piston block 33 divides the piston cylinder 31 into two independent chambers, and the two independent chambers are respectively set as an expansion chamber 311 and a compression chamber 312. The compression chamber 312 is filled with hydraulic oil. The piston block 33 is fixed with a piston rod 331 on the side facing the expansion chamber 311, and the piston rod 331 is slidably penetrated on one end of the piston cylinder 31 close to the expansion chamber 311.

[0045] One end of the piston cylinder 31 close to the compression chamber 312 is rotatably connected to the stirring shaft 21, and the end of the piston rod 331 away from the piston cylinder 31 is rotatably connected to one side of the stirring blade 23 in the thickness direction. When the stirring shaft 21 drives the stirring blade 23 to rotate, the stirring blade 23 will be subject to resistance due to the viscosity of the metal plating liquid, thereby causing the stirring blade 23 to swing on the hinged plate 212, and the piston rod 331 will drive the piston block 33 to slide.

[0046] The elastic member 39 is configured as a spring, and the elastic member 39 is disposed in the compression chamber 312 . One end of the elastic member 39 is fixedly connected to a side of the piston block 33 facing the compression chamber 312 , and the other end of the elastic member 39 is fixedly connected to an inner wall of the compression chamber 312 .

[0047] The transfer tube 34 is provided with a circular tube with one end open, and a connecting groove 211 is provided on the end surface of the end of the stirring shaft 21 extending out of the electroplating tank 1. The end of the transfer tube 34 with the opening is rotatably arranged in the connecting groove 211, and the connecting groove 211 is connected with the transfer tube 34. A fixing seat 12 is fixed on the electroplating tank 1, and the other end of the transfer tube 34 extends out of the stirring shaft 21 and is fixedly connected with the fixing seat 12. A drain pipe 313 is provided at one end of the piston cylinder 31 close to the stirring shaft 21, and one end of the drain pipe 313 is connected with the compression chamber 312, and the other end of the drain pipe 313 is connected with the connecting groove 211.

[0048] It is worth noting that the above-mentioned piston cylinder 31, piston block 33 and piston rod 331 arranged on the piston block 33 are combined to form a detection actuator for detecting the metal plating liquid. In order to ensure the accuracy of viscosity detection, the detection actuator is arranged on each group of stirring blades 23, so there are four groups of detection actuators.

[0049] Reference Figure 4 In the embodiment of the present application, the connecting tube 35 is fixedly mounted at one end of the transfer tube 34 away from the stirring shaft 21, and one end of the connecting tube 35 is connected to the transfer tube 34. A connecting seat is fixedly mounted on the outer wall of the electroplating pool 1 in the length direction. The display tube 32 is fixedly mounted on the electroplating pool 1 through the connecting seat. The display tube 32 is arranged parallel to the height direction of the electroplating pool 1. The display tube 32 is also arranged as a circular tube with an open end. A visual window 321 is arranged on the display tube 32, and a scale is arranged on the visual window 321. The end of the display tube 32 with an opening is connected to the end of the connecting tube 35 away from the transfer tube 34. The connecting groove 211, the transfer tube 34 and the connecting tube 35 are all filled with hydraulic oil, and the diameter of the connecting tube 35 is much smaller than the diameter of the display tube 32.

[0050] The sliding plug 36 is slidably disposed in the display tube 32, and the sliding plug 36 is located at one end of the display tube 32 close to the connecting tube 35. A sliding portion 361 is fixedly disposed at the end of the sliding plug 36 close to the connecting tube 35. The sliding portion 361 is slidably disposed in the connecting tube 35. A light-transmitting plate 362 is fixedly disposed at the end of the sliding plug 36 away from the connecting tube 35. The light-transmitting plate 362 is configured as a rectangular plate, and two color display areas are equally divided along the length direction of the light-transmitting plate 362. The two color display areas are respectively configured as green and red, and the green display area is located above the red display area.

[0051] The cold light lamp 37 and the color sensor 38 are both fixedly mounted on the display tube 32 . The cold light lamp 37 and the color sensor 38 are symmetrically distributed on the display tube 32 . The cold light lamp 37 and the color sensor 38 are located above the light-transmitting plate 362 . The color sensor 38 is electrically connected to the controller 11 .

[0052] In more detail, when the stirring blade 23 disturbs the metal plating liquid, the stirring blade 23 will deflect to one side, thereby driving the piston block 33 to slide in the piston cylinder 31 through the piston rod 331, and the piston block 33 will squeeze the compression chamber 312. The hydraulic oil in the compression chamber 312 is squeezed into the connecting groove 211 through the drain pipe 313. Since the connecting groove 211, the transfer pipe 34 and the connecting pipe 35 are all filled with hydraulic oil, the hydraulic oil eventually pushes the sliding plug 36 upward through the connecting pipe 35, and the green color display area is first illuminated by the cold light lamp 37. The top of the visible window 321 on the display tube 32 will display green. At the same time, the scale corresponding to the stop position of the sliding plug 36 is the viscosity of the metal plating liquid at this time, thereby realizing that the viscosity change of the metal plating liquid is displayed through the display tube 32.

[0053] It is worth noting that as the electroplating process proceeds, the metal plating liquid will gradually accumulate impurities from the workpiece surface, air and other external sources. At the same time, as the metal plating liquid itself is gradually consumed, its own liquid fluidity will deteriorate, thereby causing the viscosity of the metal plating liquid to increase. Therefore, along with the continuous stirring of the stirring blade 23, the sliding plug 36 in the display tube 32 will continue to move upward, and the top of the visible window 321 on the display tube 32 will gradually appear red. Once this happens, the color sensor 38 detects red and feeds back to the controller 11, and the controller 11 controls the sampling component 4 to perform sampling detection.

[0054] Reference Figure 7 and Figure 8 In the embodiment of the present application, the sampling assembly 4 includes a pressure pump 41, a sampling tube 42, a filter 45, a lifting member 43 and an automatic diluting member 44. A mounting frame 14 is provided on one side of the electroplating pool 1. The pressure pump 41 is fixed on the mounting frame 14. A liquid inlet end and a liquid outlet end are respectively provided on the pressure pump 41. The sampling tube 42 is lifted and set in the electroplating pool 1 by the lifting member 43, and one end of the sampling tube 42 is out of the electroplating pool 1. The sampling tube 42 is located at a corner of the electroplating pool 1. The sampling tube 42 is symmetrically arranged in the height direction of the electroplating pool 1. A liquid guide tube is arranged on the liquid inlet end of the pressure pump 41. One end of the liquid guide tube is connected to the liquid inlet end of the pressure pump 41, and the other end of the liquid guide tube is connected to the end of the sampling tube 42 away from the electroplating pool 1, and the end of the liquid guide tube connected to the sampling tube 42 is arranged as an elastic tube with a certain degree of stretchability.

[0055] The filter 45 can be configured as a filter mesh cylinder, and an internal thread is provided at one end of the sampling tube 42 away from the liquid guide tube, and the filter 45 is threadedly connected to the sampling tube 42 through the internal thread. Of course, in other embodiments of the present application, the filter 45 can also be configured as a filter plate or other forms of filter 45, as long as it can filter the residue of the sampled metal plating liquid.

[0056] The lifting member 43 includes a lifting motor 431, a screw rod 432, a slide 433 and a connecting plate 434. A mounting seat 13 is fixedly provided on the electroplating pool 1. The mounting seat 13 is located on one side of the display tube 32. The lifting motor 431 is fixedly provided at one end of the mounting seat 13 in the length direction. The lifting motor 431 is electrically connected to the controller 11. The screw rod 432 is rotatably provided on the mounting seat 13. The output end of the lifting motor 431 is fixedly connected to one end of the screw rod 432. The slide 433 is passed through the screw rod 432. The slide 433 is threadedly connected to the screw rod 432. The connecting plate 434 is provided as an "L"-shaped plate. One end of the connecting plate 434 is fixedly connected to the slide 433. The other end of the connecting plate 434 is fixedly connected to one end of the sampling tube 42 away from the electroplating pool 1.

[0057] The automatic dilution component 44 includes a self-priming pipe 441, a liquid injection pipe 442 and a water tank 443. The self-priming pipe 441 is arranged on the liquid outlet end of the pressure pump 41. The self-priming pipe 441 is arranged as a venturi tube. The self-priming pipe 441 is provided with a contraction section 4411 in the middle of the length direction. The pipe diameter at the contraction section 4411 is much smaller than the pipe diameters at both ends of the self-priming pipe 441, and a smooth curve transition is arranged between the pipe diameter at the contraction section 4411 and the pipe diameters at both ends of the self-priming pipe 441. One end of the self-priming pipe 441 is connected to the liquid outlet end of the pressure pump 41, and the other end of the self-priming pipe 441 is transmission-connected to the complexing agent detection component 5. The water tank 443 is fixed on the mounting frame 14, and the water tank 443 is connected to the external environment, the self-priming pipe 441 is connected to the water tank 443 through the injection pipe 442, one end of the injection pipe 442 is connected to the contraction section 4411, and the other end of the injection pipe 442 is connected to the water tank 443, the self-priming pipe 441 is connected to the water tank 443 through the injection pipe 442, and a one-way valve is provided on the injection pipe 442.

[0058] More specifically, when the color sensor 38 detects that the top of the visible window 321 is red, the controller 11 controls the lifting motor 431 to start, and the slide 433 drives the sampling tube 42 to slide back and forth along the height direction of the electroplating pool 1 through the connecting plate 434, and continuously samples the metal plating liquid repeatedly in the process to ensure the uniformity of sampling; at the same time, when the sample extracted by the pressure pump 41 flows through the self-priming tube 441, according to the Bernoulli principle, when the fluid flows in the pipeline, the diameter of the pipeline gradually decreases, the flow rate of the fluid will gradually increase, and the fluid pressure will decrease. Therefore, when the sample flows through the contraction section 4411, it will cause the fluid pressure at the contraction section 4411 to be much lower than the external atmospheric pressure. Because the position of the self-priming tube 441 and the water tank 443 are basically at the same height, the water in the water tank 443 can be easily sucked back into the self-priming tube 441, thereby achieving dilution of the sample. In addition, the one-way valve disposed on the injection tube 442 limits the sample from entering the water tank 443 through the injection tube 442, thereby ensuring the accuracy of subsequent complexing agent detection.

[0059] Reference Figure 9 In the embodiment of the present application, the complexing agent detection component 5 includes a detection box 51, a titration piece 52, a ray generator 53 and a ray receiving sensor 54. The detection box 51 is arranged on one side of the electroplating pool 1. The detection box 51 is located below the pressure pump 41. The liquid outlet of the pressure pump 41 is connected to the detection box 51 through a self-priming tube 441. The end of the self-priming tube 441 away from the pressure pump 41 extends into the detection box 51. A liquid level sensor 55 is arranged in the detection box 51, and the liquid level sensor 55 is electrically connected to the controller 11.

[0060] The titration component 52 is arranged on the detection box 51, and the titration component 52 includes a titration pot 521 and a burette 522. The titration pot 521 is arranged on the detection box 51, and barium nitrate solution is injected into the titration pot 521. The titration pot 521 is connected with the detection box 51 through the burette 522. One end of the burette 522 is connected with the titration pot 521, and the other end of the burette 522 is connected with the detection box 51. A first solenoid valve 523 is arranged on the burette 522, and the first solenoid valve 523 is electrically connected to the controller 11.

[0061] The ray generator 53 is disposed on one side of the detection box 51 , and the ray receiving sensor 54 is disposed on the other side of the detection box 51 . The ray generator 53 can generate ray light, which passes through the metal plating liquid sample and is received by the ray receiving sensor 54 .

[0062] More specifically, after the diluted metal plating liquid sample is injected into the test, when the sample liquid level reaches the height of the liquid level sensor, the controller 11 stops the pressure pump 41, and then controls the first electromagnetic valve 523 to open, and the titration pot 521 slowly drips the barium nitrate solution into the test box 51, and the citric acid used as the complexing agent is a ternary weak acid with multiple carboxyl groups and hydroxyl groups, which can provide multiple lone pairs of electrons. This molecular structure allows it to quickly capture barium ions and form a multi-dentate stable complex with them. This coordination reaction occurs rapidly and is almost not significantly affected by the solution conditions (such as pH); in contrast, the combination of sulfate and barium ions only depends on electrostatic effects, and the coordination ability is weaker than that of citric acid. In summary, when citric acid exists in the sample, dripping barium nitrate solution into it will not make the sample turbid, and the radiation light that can be received by the radiation receiver will not be affected. Once there is no citric acid in the sample, the sample will quickly become turbid, and the radiation light that can be received by the radiation receiver will be affected.

[0063] There are two situations here. One is that turbidity appears when the barium nitrate solution is first added, which means that there is no citric acid in the sample and the metal plating solution in the electroplating tank 1 needs to be re-prepared; the other is that turbidity appears after a certain amount of barium nitrate solution is added, which means that the sample contains citric acid, and the amount of citric acid in the sample can be calculated based on the amount of barium nitrate solution added, so that the metal plating solution in the electroplating tank 1 can be supplemented in a targeted manner to ensure the smooth progress of the entire electroplating process.

[0064] The implementation principle of the metal plating liquid component detection device of the embodiment of the present application is: the metal plating liquid is stirred by the stirring blade 23 to ensure its uniformity while its viscosity is monitored in real time. Once the viscosity exceeds the normal viscosity threshold, the metal plating liquid is uniformly sampled by the pressure pump 41 and the sample is diluted in equal proportion; finally, barium nitrate solution is added to the sample to detect whether the sample is turbid, thereby realizing the component detection of the residual amount of the complexing agent in the metal plating liquid.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A metal plating liquid component detection device, characterized in that: include: An electroplating cell, wherein a controller is provided on the electroplating cell; A stirring assembly, the stirring assembly comprising a stirring shaft and a stirring drive, the stirring shaft being arranged in the electroplating tank, the stirring shaft being provided with stirring blades, the stirring drive being fixed on the electroplating tank, the stirring drive driving the stirring shaft to rotate, thereby uniformly stirring the metal plating liquid in the electroplating tank; A viscosity detection component, wherein the viscosity detection component is disposed on the stirring blade, and the viscosity detection component performs real-time detection of the viscosity of the metal plating liquid according to the resistance experienced by the stirring blade; A sampling component, the sampling component is arranged at one side of the electroplating tank, and the sampling component can perform uniform sampling in the electroplating tank; A complexing agent detection component, the complexing agent detection component includes a detection box, a titration piece, a ray generator and a ray receiving sensor, the detection box is arranged on one side of the electroplating pool, the sampling component is connected to the detection box, the titration piece is arranged on the detection box, the titration piece drips barium nitrate solution into the detection box, the ray generator and the receiving sensor are arranged on both sides of the detection box opposite to each other, when the barium nitrate solution is dripped in, it preferentially reacts with citric acid, and the complexing agent content is detected by monitoring the change in the ray transmission intensity received by the receiving sensor.

2. A metal plating liquid composition detection device according to claim 1, characterized in that: The viscosity detection assembly includes a piston cylinder and a display tube, wherein the piston cylinder is arranged on the stirring blade, a piston block is slidably arranged in the piston cylinder, the piston block divides the piston cylinder into two independent chambers, and the two independent chambers are respectively arranged as an expansion chamber and a compression chamber, the compression chamber is filled with hydraulic oil, the piston block is located on a surface of the expansion chamber and is fixed with a piston rod, the piston rod is slidably penetrated through one end of the piston cylinder, the end of the piston cylinder away from the piston rod is rotatably connected to the stirring shaft, and the end of the piston rod away from the piston cylinder is rotatably connected to the stirring blade; the display tube is arranged on the outer wall of the electroplating tank, one end of the display tube is connected to the compression chamber, a part of the hydraulic oil in the compression chamber will enter the display tube, when the stirring shaft drives the stirring blade to rotate in the electrolytic cell, the stirring blade deflects on the stirring shaft due to the viscosity of the metal plating liquid, thereby driving the piston block to slide in the piston cylinder through the piston rod, and then the display tube displays the real-time change of the viscosity of the metal plating liquid.

3. A metal plating liquid composition detection device according to claim 2, characterized in that: A transfer tube is also provided between the display tube and the piston cylinder, a fixing seat is fixedly provided on the electroplating pool, a connecting groove is provided at one end of the stirring shaft extending out of the electroplating pool, one end of the transfer tube is rotatably arranged in the connecting groove, the connecting groove is connected with one end of the transfer tube, and the other end of the transfer tube is connected with the display tube, the transfer tube and the connecting groove are both filled with hydraulic oil, a drain pipe is fixedly provided at one end of the piston cylinder close to the stirring shaft, one end of the drain pipe is connected with the compression chamber, and the other end of the drain pipe is connected with the connecting groove.

4. A metal plating liquid composition detection device according to claim 3, characterized in that: A connecting tube is further provided between the display tube and the transfer tube, one end of the connecting tube is connected to one end of the display tube, and the other end of the connecting tube is connected to an end of the transfer tube away from the stirring shaft. The diameter of the connecting tube is much smaller than the diameter of the display tube. The display tube is slidably provided with a sliding plug, the sliding plug is located at one end of the display tube close to the connecting tube, a sliding portion is fixedly provided at one end of the sliding plug, and the sliding portion is slidably provided in the connecting tube. A visual window is provided on the display tube, and a scale is provided on the visual window. When the stirring blade drives the piston block to slide in the piston cylinder, the sliding plug slides in the display tube, thereby realizing that the real-time change of the viscosity of the metal plating liquid is displayed through the display tube.

5. A metal plating liquid composition detection device according to claim 4, characterized in that: A light-transmitting plate is fixedly provided at one end of the sliding plug away from the sliding portion, and the light-transmitting plate is set as a rectangular plate. The light-transmitting plate is equally divided into two color-developing areas along the length direction of the light-transmitting plate, and the two color-developing areas are set as green and red respectively, and the green color-developing area is located in the red color-developing area. A cold light lamp and a color sensor are also provided on the display tube. The cold light lamp and the color sensor are symmetrically distributed on the display tube, and the cold light lamp and the color sensor are both penetrated on the display tube. The color sensor is electrically connected to the controller. When the piston block slides in the piston cylinder, the sliding plug lifts the light-transmitting plate, and the cold light lamp will map lights of different colors through different color-developing areas on the light-transmitting plate, and the color sensor can receive these lights of different colors.

6. A metal plating liquid composition detection device according to claim 1, characterized in that: The sampling assembly includes a pressure pump and a sampling tube. The pressure pump is arranged on one side of the electroplating pool. One end of the sampling tube is connected to the liquid inlet end of the pressure pump, and the other end of the sampling tube extends into the electroplating pool. The sampling tube can perform uniform sampling in the electroplating pool. A filter is provided on the sampling tube. The filter is detachably arranged at one end of the sampling tube. When the sampling tube samples the metal plating liquid, the filter can filter the sampled metal plating liquid.

7. A metal plating liquid composition detection device according to claim 6, characterized in that: The sampling assembly also includes a lifting component, which includes a lifting motor, a screw rod, a slide and a connecting plate. A mounting seat is fixedly provided on the electroplating pool, and the lifting motor is fixedly provided on the mounting seat. The lifting motor is electrically connected to the controller, and the screw rod is rotatably arranged on the mounting seat. The output end of the lifting motor is fixedly connected to one end of the screw rod, the slide is passed through the screw rod, and the slide is threadedly connected to the screw rod. One end of the connecting plate is fixedly connected to the slide, and the other end of the connecting plate is fixedly connected to one end of the sampling tube away from the electroplating pool. When the lifting motor drives the screw rod to rotate, the slide drives the sampling tube to slide back and forth along the height direction of the electroplating pool through the connecting plate.

8. A metal plating liquid composition detection device according to claim 7, characterized in that: The sampling assembly also includes an automatic dilution component, which includes a self-priming tube, an injection tube and a water tank. A mounting frame is provided on one side of the electroplating pool, and the pressure pump, the self-priming tube and the water tank are all arranged on the mounting frame. One end of the self-priming tube is connected to the liquid outlet end of the pressure pump, and the other end of the self-priming tube is connected to the detection box. A contraction section is provided in the middle of the self-priming tube along the length direction, and the tube diameter at the contraction section is much smaller than the tube diameter at both ends of the self-priming tube. The injection tube is fixed on the self-priming tube, and one end of the injection tube is connected to the contraction section, and the other end of the injection tube is connected to the water tank. When the pressure pump samples the electroplating pool, the self-priming tube will automatically suck water from the water tank to dilute the metal plating liquid sample.

9. A metal plating liquid composition detection device according to claim 1, characterized in that: The titration component includes a titration pot and a burette. A liquid level sensor is arranged in the detection box, and the liquid level sensor is electrically connected to the controller. The titration pot is arranged on the detection box, and a barium nitrate solution is injected into the titration pot. One end of the burette is connected to the titration pot, and the other end of the burette is connected to the detection box. The titration pot is connected to the detection box through the burette. A first solenoid valve is arranged on the burette, and the first solenoid valve is electrically connected to the controller.

10. A method for detecting the composition of a metal plating liquid suitable for use in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, coating liquid viscosity detection, the metal coating liquid is injected into the electroplating tank, the detection device is started to stir the metal coating liquid, and the viscosity of the metal coating liquid is detected during the stirring process to obtain a first viscosity P1, and P1 is recorded as a reference value; S2, sampling. The detection device continuously stirs the metal plating liquid during the entire electroplating process, and performs real-time viscosity detection on the metal plating liquid to obtain the nth viscosity Pn. When Pn is greater than P1 and Pn is less than 1.2 times of P1, the detection device samples the metal plating liquid and dilutes the sampled metal plating liquid. S3, complexing agent detection, the detection device will slowly add barium nitrate solution to the metal plating liquid sample, and perform light transmittance detection on the metal plating liquid sample; if the light transmittance of the metal plating liquid sample is significantly reduced in the initial stage of the detection, it means that the citric acid content is insufficient; S4. Data analysis: According to the barium nitrate solution added in S3, the content of citric acid in the metal plating solution sample is obtained to determine whether to reconfigure the plating solution.

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