Processing method for realizing conduction of local area after anodic oxidation

Abstract

The invention discloses a processing method for achieving electric conduction in a local area after anodic oxidation, and belongs to the technical field of coating production technology.The processing method for achieving electric conduction in the local area after anodic oxidation comprises the steps that an aluminum product is subjected to anodic oxidation treatment, and an overall oxidation layer is prepared on the surface of the aluminum product; local removal treatment of the oxide layer: removing the local oxide layer to obtain a conductive region; and post-processing, cleaning and inspecting the oxide layer and the conductive region. The laser etching technology is applied to the machining technology of the anodized plate with the local area conducting, the anodized layer of the product is removed, the product quality is improved, the reject ratio of the product is reduced, the production cost is reduced, the production efficiency is improved, the functional requirement for local area conducting of the anodized product is met, the manufacturing process is simple, the cost is low, and the production efficiency is high. The transition area is more attractive, the qualification rate is high, and large-batch production is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of coating production technology, and specifically relates to a processing method for realizing electrical conductivity in a local area after anodization. Background Art

[0002] In biosensors, pacemakers and defibrillators, anodized aluminum plates are used as electrode materials, and their local conductive areas can transmit electrical signals. The processing technology of similar products is as follows:

[0003] A processing technology: the area that does not need to be oxidized is covered and protected by high-temperature glue, and the exposed area is oxidized by oxidizing water. In this method, the oxidizing water can easily penetrate the high-temperature glue during the oxidation process, resulting in a particularly high defect rate, increased rework costs, and even scrapping. In addition, the edge position after the high-temperature glue is applied is not straight enough, resulting in an unsightly transition area and an unsatisfactory appearance;

[0004] Another processing technology: by reserving processing allowance in advance, first do anodizing, then remove the allowance by CNC milling, and then do natural color conductive oxidation. This processing technology is costly and not suitable for mass production. In addition, there is a problem of insufficient CNC secondary positioning accuracy and low yield rate. In view of this, a processing method for achieving conductivity in a local area after anodizing is provided. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a processing method for achieving electrical conductivity in a local area after anodization.

[0006] The technical solution adopted to solve the above technical problems is:

[0007] A processing method for achieving electrical conductivity in a local area after anodization, comprising:

[0008] Anodizing of aluminum products to produce an integral oxide layer on the surface of the aluminum products;

[0009] Partial oxide layer removal treatment, removing the local oxide layer to obtain a conductive area;

[0010] Post-processing, cleaning and inspection of oxide layers and conductive areas.

[0011] Furthermore, the anodizing treatment of the aluminum product is to obtain an integral oxide layer on the surface of the aluminum product through an anodizing process, and the anodizing process includes:

[0012] Use an anodizing production line to form a dense aluminum oxide film on the surface of aluminum products;

[0013] The anodizing production line comprises an electrolytic cell, a direct current power supply and a clamp.

[0014] Furthermore, the local removal of the oxide layer, removing the local oxide layer by laser equipment to obtain a conductive area, includes the following steps:

[0015] Determine the laser engraving area and path;

[0016] Clamping and positioning of anodized aluminum products;

[0017] Laser removal of local oxide layer;

[0018] Restore local conductivity.

[0019] Furthermore, the post-processing includes inspecting the oxide layer through visual inspection and electrical testing to determine the electrical performance of the conductive area.

[0020] A processing device for achieving electrical conductivity in a local area after anodization, comprising:

[0021] Aluminum product anodizing treatment module, used to obtain an integral oxide layer on the surface of aluminum products through an anodizing process;

[0022] An oxide layer local removal processing module is used to remove the local oxide layer by laser equipment to obtain a conductive area;

[0023] Post-processing module for cleaning and inspection of oxide layers.

[0024] Furthermore, the laser equipment is one of a laser cleaning machine, a laser stripping machine, a laser marking machine and a laser annealing machine.

[0025] Through the above technical solution, laser cleaning machines, laser stripping machines, laser marking machines and laser annealing machines can all emit lasers and control the laser intensity to achieve the effect of surface removal.

[0026] The laser equipment adopts a laser machine, which is equipped with a matching computer control system and design software. The laser engraving machine uses a carbon dioxide laser or a fiber laser.

[0027] Through the above technical solution, the design software is used to design the laser path, processing depth and processing area, and the computer control system is used to control the movement of the laser engraving machine and the laser intensity.

[0028] An anodized plate for realizing local area conductivity, the anodized plate comprises an anodized area, a first laser engraved area and a second laser engraved area, wherein the first laser engraved area and the second laser engraved area are obtained by removing the local anodized area on the surface of the anodized plate.

[0029] The locally conductive anodized plate obtained by the above technical solution can be used in biosensors, pacemakers, defibrillators, neurostimulators, electrosurgical equipment, medical imaging equipment, laboratory instruments, precision surgical tools, interfaces and connectors of medical devices, patient monitoring systems and wireless communication equipment.

[0030] The beneficial effects of the present invention are as follows:

[0031] (1) The present invention applies the laser engraving process to the processing technology of the anodized plate with local conductive area, removes the anodized layer of the product, improves the quality of the product, reduces the defective rate of the product, reduces the production cost, improves the production efficiency, and realizes the functional requirement of the local area of ​​the anodized product to be conductive. The production process is simple, the cost is low, and the transition area is more beautiful;

[0032] (2) The present invention adopts a mature laser engraving process and applies its processing principle to remove the anodized layer of the product. The laser can also achieve a calibration effect to ensure that the relative position of the laser beam and the surface of the aluminum product is accurate and the thickness of the oxide layer removed meets the requirements. In order to achieve the normal use of the laser machine in this solution, it is necessary to optimize the laser path to achieve a uniform surface thickness in the laser engraved area after processing. The laser engraved area can be modified to improve long-term stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a main flow chart of a processing method for realizing electrical conduction in a local area after anodization according to the present invention;

[0034] Figure 2 It is a schematic diagram of the specific structure of a processing device for realizing electrical conduction in a local area after anodization according to the present invention;

[0035] Figure 3 It is a specific schematic diagram of the process of partial removal of the oxide layer of the present invention;

[0036] Figure 4 It is a schematic structural diagram of an anodized plate for realizing local area conductivity of the present invention.

[0037] Figure numerals: 4, laser engraving area one; 5, anodized area; 6, laser engraving area two. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] like Figure 1 and Figure 3As shown, this embodiment provides a processing method for realizing electrical conductivity in a local area after anodization, comprising:

[0040] Step 100: Anodizing the aluminum product to obtain an overall oxide layer on the surface of the aluminum product; Anodizing the aluminum product to obtain an overall oxide layer on the surface of the aluminum product through an anodizing process, the anodizing process includes:

[0041] The anodizing production line is used to form a dense aluminum oxide film on the surface of aluminum products, which specifically includes pre-treatment, anodizing, sealing treatment and post-treatment:

[0042] Pre-treatment requires cleaning the aluminum products to remove oil and oxides on the surface, degreasing to remove grease on the surface, and pickling to remove the oxide layer on the surface.

[0043] During the anodizing process, the treated aluminum product is fixed on a fixture, placed in an electrolytic cell, and powered on. The aluminum product acts as an anode to form an aluminum oxide film in the electrolyte. The current and electrolysis time are controlled to obtain an aluminum oxide film of the desired thickness.

[0044] During the sealing treatment, the oxidized aluminum products are sealed to improve the corrosion resistance and adhesion of the aluminum oxide film. The sealing treatment usually uses a chemical sealant or heat sealing.

[0045] In post-processing, the aluminum oxide film is cleaned to remove surface residues and inspected to ensure that the quality and performance of the aluminum oxide film meet the requirements.

[0046] The anodizing production line includes an electrolytic cell, a DC power supply, a fixture and an oxidizing liquid circulation system. The electrolytic cell is used to contain an electrolyte containing sulfuric acid or oxalic acid; the DC power supply is used to provide current to promote the formation of an aluminum oxide film; the fixture is used to fix the aluminum product to ensure its stability during the electrolysis process; the oxidizing liquid circulation system is used to maintain uniform electrolyte temperature and composition.

[0047] Step 200: Local removal of the oxide layer to obtain a conductive area by removing the local oxide layer. In the market, laser engraving machines are mainly used to make engraving and etching patterns and texts, and can be used to process various materials. In this solution, the local removal of the oxide layer to obtain a conductive area by removing the local oxide layer through a laser device includes the following steps:

[0048] Step 210: Determine the laser engraving area and path, determine the specific areas where the oxide layer needs to be removed, which are usually the conductive areas predetermined in the design drawing, and analyze the shape, size and position of the conductive areas; use professional design software (such as AutoCAD, Core l DRAW, etc.) to draw the pattern of the laser engraving area; determine the path of the laser scanning, which is usually a continuous line or curve to avoid damage caused by repeated scanning; optimize the path to reduce processing time and improve efficiency; ensure that the path will not affect the structural integrity of the aluminum product;

[0049] Step 220: Clamp and position, clean the surface of the aluminum product to ensure that there is no oil or dust; select a suitable fixture to ensure that the fixture does not damage the aluminum product; fix the aluminum product on the workbench of the laser equipment and use the precision positioning system to ensure the accurate position; adjust the fixture to ensure that the aluminum product does not move during the processing; use the calibration function of the laser equipment to ensure that the relative position of the laser beam and the surface of the aluminum product is accurate;

[0050] Step 230: Remove the local oxide layer by laser. According to the material of the aluminum product and the thickness of the oxide layer, set the laser power, speed, frequency and other parameters; conduct a small-scale test to determine the best laser processing parameters; start the laser equipment and remove the oxide layer according to the preset path; monitor the processing process to ensure that the laser beam is stable and there is no jump or break phenomenon; the laser beam accurately removes the oxide layer in the specified area to expose the conductive aluminum substrate;

[0051] Step 240: Restore local conductivity, check conductivity, use electrical testing instruments (such as a multimeter) to check whether the area after the oxide layer is removed has restored conductivity; ensure that the conductive area meets the design requirements; clean the area where the oxide layer is removed to remove debris and contaminants generated during the processing; perform a visual inspection to ensure that there is no residual oxide layer and damage in the removed area; perform a final functional inspection on the area where conductivity is restored to ensure its reliability and stability; record the inspection results, and rework or scrap defective products.

[0052] Through the above steps, the conductive function of local areas can be effectively realized on the anodized aluminum products, providing key technical support for the manufacture of medical products and other precision electronic products.

[0053] Step 300: Post-processing, cleaning and inspecting the oxide layer and the conductive area; Post-processing, inspecting the oxide layer by visual inspection and electrical testing to determine the electrical performance of the conductive area:

[0054] Among them, during the visual inspection, the processed aluminum products are placed on a well-lit workbench, the inspection area is cleaned to ensure that there is no dust and oil, and the area where the oxide layer is removed is preliminarily inspected with the naked eye or a magnifying glass to observe whether there is residual oxide layer, cracks, burns or other surface defects. Specifically, a high-magnification microscope is used for a more detailed inspection to observe whether the edges of the removed area are neat and whether there are any tiny defects. A magnifying glass such as a 2x to 10x magnifying glass is used for preliminary inspection, and then a microscope such as the Olympus STM6 is used for detailed inspection, which has high magnification and clear imaging capabilities.

[0055] Among them, during the electrical test, ensure that the test equipment has been calibrated and is in normal working condition, prepare a test fixture for contacting the conductive area, contact the test fixture to the conductive area with the oxide layer removed, set the test equipment, such as test voltage, current, time and other parameters, start the test equipment, and perform a resistance test to determine the conductivity of the conductive area. Analyze the test data to determine whether the conductive area meets the design requirements. Specifically, you can use a digital multimeter, such as the Fluke 87-V digital multimeter, to measure basic electrical parameters such as resistance, voltage, and current. You can also use a resistance tester, such as the Keythl ey 2400 series source measurement unit, to provide high-precision resistance measurement. At the same time, you can use an electrical test bench, such as the GPI B electrical test bench from Taishi Electronics, for automated electrical performance testing.

[0056] Through the above steps and equipment, the conductive area after the oxide layer is removed can be effectively inspected to ensure that its electrical performance meets the strict requirements of medical products and other precision electronic products. It should be noted that the actual equipment model used may vary depending on the specific production environment and budget.

[0057] A processing device for achieving electrical conductivity in a local area after anodization, referring to Figure 2 ,include:

[0058] The aluminum product anodizing treatment module 1 is used to obtain an integral oxide layer on the surface of the aluminum product through an anodizing process. The process flow is as follows:

[0059] 11. Pretreatment: cleaning, degreasing and pickling of aluminum products.

[0060] Problem: Surface oil stains are difficult to remove.

[0061] Solution: Use a strong degreaser and ultrasonic cleaning technology.

[0062] 12. Anodizing:

[0063] Problem: The oxide layer thickness is uneven.

[0064] Solution: Adjust the electrolyte composition and current density to ensure uniform oxidation.

[0065] Problem: Cracks or holes appear in the oxide layer.

[0066] Solution: Optimize anodizing process parameters such as current, time and temperature.

[0067] 13. Closed processing:

[0068] Problems: Incomplete sealing and poor corrosion resistance.

[0069] Solution: Use hot water sealing or nickel salt sealing to improve the sealing effect.

[0070] The oxide layer local removal processing module 2 is used to remove the local oxide layer by laser equipment to obtain a conductive area. The process flow is as follows:

[0071] 21. Design and programming: draw the pattern for removing the oxide layer and set the laser parameters.

[0072] Problems: The design pattern is complex and difficult to program.

[0073] Solution: Use high-precision design software, or simplify the pattern step by step.

[0074] 22. Positioning and fixing: Fix the aluminum product on the workbench of the laser equipment.

[0075] Problems: inaccurate positioning and large processing deviation.

[0076] Solution: Use high-precision fixtures and positioning systems.

[0077] 23. Laser removal:

[0078] Problem: The oxide layer is not removed completely or the substrate is damaged.

[0079] Solution: Optimize laser parameters such as power, speed, and scan spacing.

[0080] Problem: The edges of the removed area are rough.

[0081] Solution: Use more sophisticated laser processing techniques, such as micromachining or slow scanning.

[0082] Post-processing module 3 is used to clean and inspect the oxide layer. The process flow is as follows:

[0083] 31. Cleaning:

[0084] Problem: Residue is difficult to remove.

[0085] Solution: Use a variety of cleaning agents and cleaning methods, such as ultrasonic cleaning and jet cleaning.

[0086] 32. Inspection:

[0087] Problem: The conductivity of the conductive area is unstable.

[0088] Solution: Perform multiple electrical tests to ensure the consistency of the conductive area.

[0089] Problem: Visual inspection makes it difficult to detect tiny defects.

[0090] Solution: Use a high-magnification microscope or an automated optical inspection system.

[0091] 34. Finished product packaging:

[0092] Problem: The product was damaged during shipping.

[0093] Solution: Use shock-proof packaging materials and appropriate packaging methods.

[0094] Through the detailed analysis and problem-solving methods of the above process flow, the processing equipment can more effectively realize the conductive function of the local area of ​​the aluminum product after anodizing, and improve the product quality and production efficiency.

[0095] In a further embodiment, the laser device is one of a laser cleaning machine, a laser stripping machine, a laser marking machine and a laser annealing machine;

[0096] Among them, the laser cleaning machine is specially used to clean oxides, paints, oil stains, etc. on the surface of metals, plastics, ceramics and other materials. It has the characteristics of non-contact cleaning, little damage to the substrate, and is suitable for precision cleaning;

[0097] Laser stripping machines are used to strip films, solders, adhesives, etc. from electronic components. They can precisely control the stripping depth and range and are suitable for micro-machining.

[0098] Although laser cutting machines are mainly used for cutting materials, they can also be used to remove surface coatings. They have the characteristics of high cutting accuracy and are suitable for a variety of materials and thicknesses.

[0099] In addition to marking, laser marking machines can also be used to slightly remove surface materials with fast processing speed; laser engraving machines are used to engrave or remove the surface of materials, create deep patterns, and have fine engraving. They are suitable for engraving complex patterns and can obtain conductive areas of different shapes;

[0100] Laser annealing machine changes the surface properties of materials through laser heating, and is sometimes used to remove surface oxides; it controls the temperature and heating area, and is suitable for material modification. It can improve the mechanical strength and corrosion resistance of the conductive area through modification, and increase the service life;

[0101] These laser devices can choose different laser sources according to different application requirements and working principles, such as carbon dioxide lasers, fiber lasers, solid lasers, etc. Each device has its specific application fields and technical advantages. When choosing laser removal equipment, factors such as material type, processing accuracy, and production efficiency need to be considered.

[0102] In a further embodiment, the laser equipment uses a laser machine, which has a built-in computer control system and design software, and the laser engraving machine uses a carbon dioxide laser or a fiber laser.

[0103] The design software is used to design the laser path, processing depth and processing area, and the computer control system is used to control the movement of the laser engraving machine and the laser intensity, including:

[0104] 1. The functions and operations of the design software include:

[0105] (1) Pattern design:

[0106] Users can draw or import the shapes that need to be laser engraved in the design software;

[0107] Use graphic editing tools such as lines, curves, rectangles, ellipses, etc. to create design patterns. In this case, you need to design two rectangles of different shapes and sizes.

[0108] (2) Path planning:

[0109] The software automatically or manually sets the laser engraving path to optimize processing efficiency and accuracy;

[0110] Select the path type (such as one-way, round trip, continuous, etc.), adjust the path order and direction, and there are overlapping parts between the paths to ensure that there is no excess material within the obtained rectangular range and to ensure good conductive effect.

[0111] (3) Parameter settings:

[0112] Set the depth, speed, power and other parameters of laser engraving;

[0113] Enter specific values ​​and the software will recommend appropriate parameters based on material properties and laser type.

[0114] (4) Simulation preview:

[0115] Simulate the laser engraving process in the software and preview the final effect.

[0116] Run the simulation program to check whether the design is reasonable and adjust the parameters until you are satisfied.

[0117] 2. Functions and Operations of Computer Control Systems

[0118] (1) Motion control:

[0119] Control the movement of the laser engraving machine, including the movement of the X, Y, and Z axes.

[0120] Convert the path information in the design software into control signals for motor movement.

[0121] (2) Laser intensity adjustment:

[0122] Adjust the laser power according to different materials and processing depth.

[0123] Set the laser power via the software interface or directly in the control system.

[0124] (3) Real-time monitoring:

[0125] Monitor the laser engraving process to ensure processing quality.

[0126] Use equipment such as sensors and cameras to collect processing data and make real-time adjustments when necessary.

[0127] (4) Safety protection:

[0128] When an abnormality occurs, the processing is stopped immediately to protect operators and equipment.

[0129] Set up an emergency stop button to implement the emergency stop function at the software and hardware levels.

[0130] 3. Laser Types and Operations

[0131] (1) Carbon dioxide laser:

[0132] Features: Suitable for cutting and engraving non-metallic materials. In this solution, it is used for engraving on aluminum plates to remove local oxide layers.

[0133] Adjust the output power and frequency of the laser according to material characteristics and processing requirements.

[0134] (2) Fiber laser:

[0135] Features: Suitable for high-precision processing, especially engraving and cutting of metal materials. In this scheme, its engraving ability is used.

[0136] Operation: Select the appropriate wavelength (usually 1064nm) and adjust the laser parameters to suit different processing tasks.

[0137] Through the implementation of the above technical solutions, the laser engraving machine can efficiently and accurately complete the processing of local areas and realize the function of conductivity in local areas. The whole process is highly automated, which reduces human errors and improves production efficiency and product quality.

[0138] An anodized plate that achieves local area conductivity, referring to Figure 4 The anodized plate includes an anodized area 5, a laser engraved area 1 4 and a laser engraved area 2 6. The laser engraved area 1 4 and the laser engraved area 2 6 are obtained by removing the local anodized area 5 on the surface of the anodized plate.

[0139] The obtained anodized plates can be specifically applied in the following medical devices:

[0140] Biosensors: Anodized aluminum plates are used as electrode materials in biosensors, in contact with biological tissues, to monitor physiological parameters such as blood sugar and heart rate. Their local conductive areas ensure that the sensors can accurately capture bioelectric signals.

[0141] Pacemakers and defibrillators: These devices use anodized aluminum for their internal circuit boards, where local conductive areas are used for signal transmission and power distribution to ensure proper functioning of the device.

[0142] Neurostimulator: used to treat neurological diseases, the local conductive area of ​​the anodized aluminum plate can accurately transmit electrical signals to specific nerves;

[0143] Electrosurgical equipment: such as electrosurgery and electrocoagulation devices, where the local conductive areas of anodized aluminum plates are used to precisely control the current to achieve cutting and hemostasis;

[0144] Medical imaging equipment: For example, the plate detector of an X-ray machine, where the local conductive area of ​​the anodized aluminum plate is used to collect and process image signals;

[0145] Laboratory instruments: such as the heating plate in a PCR machine, where localized conductive areas are used to heat specific areas for DNA amplification;

[0146] Precision surgical tools: such as components of laser scalpels, where local conductive areas are used to guide the laser beam;

[0147] Interfaces and connectors for medical devices: used to connect different medical devices or components, and local conductive areas ensure stable signal transmission;

[0148] Patient monitoring systems: such as electrocardiogram (ECG) monitoring devices, where local conductive areas are used to capture and transmit cardiac signals;

[0149] Wireless communication devices: such as antennas in implantable medical devices, where local conductive areas are used to send and receive wireless signals;

[0150] The characteristics of anodized aluminum plates include high hardness and wear resistance, good heat resistance and insulation, and excellent corrosion resistance. These characteristics enable them to play a key role in medical equipment, not only improving the performance of the equipment but also ensuring the safety of patients.

[0151] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A processing method for achieving electrical conductivity in a local area after anodization, characterized in that: include: Anodizing of aluminum products to produce an integral oxide layer on the surface of the aluminum products; Partial oxide layer removal treatment, removing the local oxide layer to obtain a conductive area; Post-processing, cleaning and inspection of oxide layers and conductive areas.

2. According to the processing method for realizing electrical conductivity in a local area after anodizing according to claim 1, the anodizing treatment of the aluminum product is characterized in that: The anodizing process is used to obtain an integral oxide layer on the surface of aluminum products. The anodizing process includes: A dense aluminum oxide film is formed on the surface of aluminum products using an anodizing production line.

3. The method for realizing electrical conductivity in a local area after anodization according to claim 1, wherein the oxide layer is locally removed, characterized in that: The local oxide layer is removed by laser equipment to obtain a conductive area, including the following steps: Determine the laser engraving area and path; Clamping and positioning of anodized aluminum products; Laser removal of local oxide layer; Restore local conductivity.

4. The method for realizing electrical conductivity in a local area after anodization according to claim 1, wherein the post-processing is characterized in that: The oxide layer is inspected visually as well as electrically tested to determine the electrical performance of the conductive areas.

5. A processing device for achieving electrical conductivity in a local area after anodization, characterized in that: include: An aluminum product anodizing treatment module, used to produce an integral oxide layer on the surface of the aluminum product through an anodizing production line, wherein the anodizing production line includes an electrolytic cell, a DC power supply and a fixture; An oxide layer local removal processing module is used to remove the local oxide layer by laser equipment to obtain a conductive area; Post-processing module for cleaning and inspection of oxide layers.

6. The method for realizing electrical conductivity in a local area after anodization according to claim 5, characterized in that: The laser equipment is one of a laser cleaning machine, a laser stripping machine, a laser marking machine and a laser annealing machine.

7. The method for realizing electrical conductivity in a local area after anodization according to claim 5, characterized in that: The laser equipment adopts a laser machine, which is equipped with a matching computer control system and design software. The laser engraving machine uses a carbon dioxide laser or a fiber laser.

8. An anodized plate that achieves electrical conductivity in a local area, using the processing equipment for achieving electrical conductivity in a local area after anodization as claimed in claim 5, characterized in that: The anodized plate comprises an anodized area, a first laser engraved area and a second laser engraved area, wherein the first laser engraved area and the second laser engraved area are obtained by removing a local anodized area on the surface of the anodized plate.

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