A method for inhibiting stray corrosion in electrochemical machining of anesthesia puncture needles based on UV coating technology

Abstract

The present invention relates to a method for inhibiting stray corrosion in electrolytic machining of anesthesia puncture needles based on UV coating technology, comprising: establishing an electric field simulation model of anesthesia puncture needles; determining a first target coating area according to a preset electric field strength threshold and an electric field simulation model; selecting key nodes for the boundary of the first target coating area, performing NURBS curve fitting, and generating a smooth curve boundary; determining whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area, and if so, performing a UV insulating layer coating operation on the second target coating area; if not, regenerating a smooth curve boundary. The beneficial effect of the present invention is that the present invention accurately identifies high electric field strength areas of anesthesia puncture needles that are susceptible to stray corrosion during electrolytic machining through an electric field simulation model. Subsequently, a smooth curve boundary is generated using NURBS curve fitting technology to effectively inhibit stray corrosion during electrolytic machining.

Description

Technical Field

[0001] This invention relates to the field of image extraction technology, and more specifically, to a method for inhibiting stray corrosion during electrolytic processing of anesthesia puncture needles based on UV coating technology. Background Technology

[0002] Medical dural puncture needles are widely used in medical diagnosis and treatment, and their precision and durability directly affect the safety and effectiveness of the procedure. In existing technologies, electrolytic machining is typically used to process the guide grooves on the surface of the puncture needle. However, stray corrosion easily occurs in non-machined areas during electrolytic machining. This corrosion not only reduces the quality of the guide grooves but also prevents them from effectively restraining the mating needle, causing the needle to slip out from both sides of the guide grooves during use, affecting the stability and accuracy of the procedure.

[0003] Currently, common techniques for suppressing stray corrosion include adjusting electrolyte concentration, improving cathode design, adding electric field shielding devices, adjusting the pulse parameters of the machining power supply, and controlling repeated feeds of the cathode tool. However, these methods have some limitations. First, adjusting electrolyte concentration and improving cathode design cannot completely solve the problem of electric field leakage in non-machining areas and may introduce new process complexities. Second, although electric field shielding devices can control the electric field distribution to some extent, their complex structure can easily lead to uneven shielding, resulting in unstable machining quality. In addition, while using pulsed power supplies and repeated feeds of the cathode tool can mitigate stray corrosion to some extent, it significantly reduces machining efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for inhibiting stray corrosion during electrolytic processing of anesthesia puncture needles based on UV coating technology.

[0005] Firstly, a method for inhibiting stray corrosion during electrolytic machining of anesthesia puncture needles based on UV coating technology is provided, including:

[0006] S1. Establish an electric field simulation model for the anesthesia puncture needle;

[0007] S2. Determine the first target coating area based on the preset electric field strength threshold and the electric field simulation model; the first target coating area is the region in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold;

[0008] S3. Select key nodes for the boundary of the first target coating area, and perform NURBS curve fitting based on the key nodes to generate a smooth curve boundary;

[0009] S4. Determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If yes, perform a UV insulation layer coating operation on the second target coating area. If no, adjust the weight of the key node and regenerate the smooth curve boundary.

[0010] Preferably, S1 includes:

[0011] S101. Establish three-dimensional models of the anesthesia puncture needle and the cathode tool actually used in the machining process;

[0012] S102. Mesh the anesthesia needle, cathode tool, and electrolyte between them, establish an electric field model, set relevant parameters of the electric field model in the software, calculate the electric field strength between the cathode tool and the anesthesia needle, and obtain the electric field strength distribution at each point on the surface of the anesthesia needle. The relevant parameters of the electric field model include electrolyte conductivity, equilibrium point on the anode and cathode surfaces, exchange current density on the anode and cathode surfaces, and electric field strength value on the surface of the anesthesia needle when simulating the initial processing state.

[0013] S103. Based on the electric field intensity distribution, draw an electric field intensity contour map.

[0014] Preferably, in S3, the key node is a cusp, inflection point, or a location with a large curvature change in the boundary of the first target coating area.

[0015] Preferably, in step S4, the UV insulating layer coating operation on the second target coating area includes:

[0016] The anesthetic puncture needle was fixed and exposed to the UV ink spraying device;

[0017] The UV ink is uniformly coated onto the second target coating area using the UV ink spraying device.

[0018] The second target coating area is irradiated with a strong ultraviolet lamp, and the UV ink is cured under ultraviolet light to form a UV insulating layer.

[0019] As a preferred option, it also includes:

[0020] S5. After electrolytic processing of the anesthetic puncture needle with UV insulation layer, the UV insulation layer is removed by soaking in ethanol and scraping off with a thin sheet with a hardness lower than that of the puncture needle material.

[0021] In a second aspect, a stray corrosion suppression system for anesthesia puncture needles based on UV coating technology is provided for performing any of the methods described in the first aspect, including:

[0022] A module is created to simulate the electric field of the anesthesia puncture needle.

[0023] The determining module is used to determine a first target coating area based on a preset electric field strength threshold and the electric field simulation model; the first target coating area is the region in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold;

[0024] The generation module is used to select key nodes for the boundary of the first target coating area and perform NURBS curve fitting based on the key nodes to generate a smooth curve boundary.

[0025] The judgment module is used to determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If yes, the UV insulation layer coating operation is performed on the second target coating area; if no, the weight of the key node is adjusted and the smooth curve boundary is regenerated.

[0026] Thirdly, a computer storage medium is provided, wherein a computer program is stored therein; when the computer program is run on a computer, the computer causes the computer to perform any of the methods described in the first aspect.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention uses an electric field simulation model to accurately identify high electric field intensity regions in anesthesia puncture needles that are susceptible to stray corrosion during electrolytic processing. Subsequently, NURBS curve fitting technology is used to generate smooth curve boundaries, ensuring that the UV insulating layer accurately covers these high-risk areas and effectively suppresses stray corrosion during electrolytic processing. This precise coating method not only reduces unnecessary material consumption but also significantly improves the durability and safety of the puncture needle, avoiding the risk of performance degradation or failure due to corrosion.

[0029] 2. This invention combines electric field simulation, NURBS curve fitting, and UV coating technology to form an automated and systematic processing flow. By presetting electric field strength thresholds and performing precise simulation calculations, potential corrosion problems can be predicted and addressed in advance, thereby optimizing electrolytic processing parameters and coating strategies. This intelligent processing flow not only shortens the production cycle but also improves the consistency and stability of product quality.

[0030] 3. This invention uses UV coating technology to replace traditional anti-corrosion methods, such as electroplating or chemical coating, offering significant environmental advantages. UV ink cures rapidly under ultraviolet light, eliminating the need for high-temperature baking or large amounts of chemical reagents, thus reducing the emission of harmful substances and energy consumption. Simultaneously, because the UV insulating layer can precisely cover the areas requiring protection, it avoids excessive material usage, further reducing production costs. Attached Figure Description

[0031] Figure 1 A schematic flowchart of a method for inhibiting stray corrosion in anesthesia puncture needles based on UV coating technology during electrolytic processing, provided in an embodiment of the present invention.

[0032] Figure 2 A flowchart for determining the coating area provided in an embodiment of the present invention;

[0033] Figure 3 A flowchart for generating the coating area boundary provided in an embodiment of the present invention;

[0034] Figure 4 This is a diagram of the electric field intensity on the surface of a needle provided in an embodiment of the present invention;

[0035] Figure 5 A contour map of the electric field intensity on the surface of the needle provided in an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of the coating area edge line drawn using NURBS curves, provided for an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram illustrating the actual coating results using UV light, provided in an embodiment of the present invention.

[0038] Figure 8 This is a schematic diagram illustrating the processing effect of electrolytic processing without UV coating insulation provided in an embodiment of the present invention.

[0039] Figure 9 A schematic diagram illustrating the processing effect of UV-coated insulation after electrolytic processing, provided in an embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the stray corrosion suppression system for electrolytic machining of anesthesia puncture needles provided in an embodiment of the present invention. Detailed Implementation

[0041] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0042] Example 1:

[0043] To address the problem of stray corrosion in non-machined areas caused by electrolytic machining in existing technologies, and to improve the machining accuracy and quality of guide grooves, such as... Figure 1 As shown, Embodiment 1 of this application provides a method for inhibiting stray corrosion during electrolytic machining of anesthesia puncture needles based on UV coating technology, comprising:

[0044] S1. Establish an electric field simulation model for the anesthesia puncture needle.

[0045] Specifically, S1 includes:

[0046] S101. Establish three-dimensional models of the anesthesia puncture needle and the cathode tool used in actual processing.

[0047] It should be noted that in the embodiments of this application, the cathode tool is used as the cathode of the electric field in the electrolytic machining process, and the electric field intensity distribution is formed based on the potential difference generated by the cathode tool.

[0048] S102. Mesh out the anesthesia needle, cathode tool, and electrolyte between them, establish an electric field model, set relevant parameters of the electric field model in the software, calculate the electric field strength between the cathode tool and the anesthesia needle, and obtain the electric field strength distribution at each point on the surface of the anesthesia needle. The relevant parameters of the electric field model include electrolyte conductivity, equilibrium point on the anode and cathode surfaces, exchange current density on the anode and cathode surfaces, and electric field strength value on the surface of the anesthesia needle when simulating the initial processing state.

[0049] In S102, mesh generation is used to calculate the electric field intensity distribution between the cathode tool and the anesthesia puncture needle, which facilitates the subsequent extraction and analysis of the electric field intensity on the surface of the anesthesia puncture needle.

[0050] In S102, the mesh size for the gap between the upper surface of the needle and the cutting tool can be increased to make the simulation results closer to reality. For example, Figure 4 The electric field intensity diagram of the needle surface in the equiaxial direction is shown.

[0051] S103. Based on the electric field intensity distribution, draw an electric field intensity contour map.

[0052] like Figure 5 As shown, an electric field intensity contour map was plotted using simulation software. By comparing and analyzing the electric field intensity in the stray corrosion areas of the electrolytically processed and non-electrolytically processed regions on the needle surface, a reasonable electric field intensity threshold for S2 was established.

[0053] S2. Determine the first target coating area based on the preset electric field strength threshold and the electric field simulation model; the first target coating area is the area in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold.

[0054] During electrochemical machining, stray corrosion in non-machined areas mainly occurs in the initial stage of machining, before the electrode reaches the feed equilibrium gap. To address this stray corrosion phenomenon, this invention first uses electric field simulation technology to simulate the electric field intensity distribution on the surface of the anesthetic puncture needle during electrochemical machining, further determining the area to be coated. For example... Figure 2As shown, after S101-S103 and S2, the area that needs to be coated with an insulating layer can be determined.

[0055] S3, such as Figure 3 As shown, key nodes are selected for the boundary of the first target coating area, and NURBS curve fitting is performed based on the key nodes to generate a smooth curve boundary.

[0056] Because the boundaries of the simulated coating area (i.e., the first target coating area) are usually irregular and rough, direct coating may lead to a decrease in the quality of the insulation layer boundary, affecting the anti-corrosion effect. In particular, the key to preventing stray corrosion is the area near the boundary between the electrolytically processed area and the non-electrolytically processed area. Figure 6 As shown, this invention employs NURBS curve technology to optimize the boundary of the coating area. Due to its flexibility and accuracy, the NURBS curve can effectively smooth the boundary, resulting in a continuous and smooth edge in the coating area. This step is crucial for ensuring the uniformity of the UV coating and the quality of the processed guide groove.

[0057] In S3, key nodes are the cusps, inflection points, or locations with significant curvature changes within the boundary of the first target coating area.

[0058] S4. Determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If yes, perform a UV insulation layer coating operation on the second target coating area. If no, adjust the weight of the key node and regenerate the smooth curve boundary.

[0059] In addition, after confirming that the second target coating area covers the first target coating area, it is also necessary to generate a DXF file that can be recognized by the spraying equipment.

[0060] Example 2:

[0061] Based on Example 1, Example 2 of this application provides a more specific method for inhibiting stray corrosion during electrolytic machining of anesthesia puncture needles based on UV coating technology, including:

[0062] S1. Establish an electric field simulation model for the anesthesia puncture needle.

[0063] S2. Determine the first target coating area based on the preset electric field strength threshold and the electric field simulation model; the first target coating area is the area in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold.

[0064] S3. Select key nodes for the boundary of the first target coating area, and perform NURBS curve fitting based on the key nodes to generate a smooth curve boundary.

[0065] S4. Determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If yes, perform a UV insulation layer coating operation on the second target coating area. If no, adjust the weight of the key node and regenerate the smooth curve boundary.

[0066] In S4, the UV insulating layer is coated onto the second target coating area, including:

[0067] Coating preparation: Secure the anesthetic needle to a specialized clamp, ensuring it does not move or deflect during the coating process. Using a precisely controlled moving platform, expose the needle surface to the UV ink spraying device.

[0068] UV ink spraying: UV ink is uniformly coated onto the target area using UV ink. Because the NURBS profile provides precise boundaries, control during the spraying process ensures that ink does not overflow into non-target areas.

[0069] UV Curing: A strong ultraviolet lamp is used to irradiate the second target coating area. The UV ink cures within seconds under ultraviolet light, forming a stable insulating layer. This insulating layer has excellent corrosion resistance and effectively prevents stray corrosion. For example, Figure 7 The results of actual UV coating are shown. Furthermore, a comparison is provided. Figure 8 and Figure 9 It is known that by applying UV coating to the non-electrolytic area, stray corrosion in the non-electrolytic area during processing can be effectively suppressed.

[0070] S5. After electrolytic processing of the anesthetic puncture needle with UV insulation layer, the UV insulation layer is removed by soaking in ethanol and scraping off with a thin sheet with a hardness lower than that of the puncture needle material.

[0071] Specifically, S5 includes:

[0072] S501, Ethanol Immersion: Immerse the puncture needle coated with the insulating layer in an ethanol solution. Ethanol can effectively dissolve or soften the insulating layer after UV ink curing, preparing it for subsequent mechanical removal.

[0073] S502. Mechanical Scraping: After soaking, gently scrape off the insulation layer using a thin sheet (such as a nylon sheet) with a hardness lower than that of the puncture needle surface material. Because the nylon sheet has low hardness, it will not scratch or damage the needle surface, ensuring the surface smoothness and integrity after the coating is removed.

[0074] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0075] Example 3:

[0076] Based on Example 1, Example 3 of this application provides a stray corrosion suppression system for electrolytic machining of anesthesia puncture needles based on UV coating technology, such as... Figure 10 As shown, it includes:

[0077] A module is created to simulate the electric field of the anesthesia puncture needle.

[0078] The determining module is used to determine a first target coating area based on a preset electric field strength threshold and the electric field simulation model; the first target coating area is the region in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold;

[0079] The generation module is used to select key nodes for the boundary of the first target coating area and perform NURBS curve fitting based on the key nodes to generate a smooth curve boundary.

[0080] The judgment module is used to determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If yes, the UV insulation layer coating operation is performed on the second target coating area; if no, the weight of the key node is adjusted and the smooth curve boundary is regenerated.

[0081] Specifically, the system provided in this embodiment is the same as the system corresponding to the method provided in embodiment 1. Therefore, the parts in this embodiment that are the same as or similar to those in embodiment 1 can be referred to each other and will not be described again in this application.

Claims

1. A method for inhibiting stray corrosion in electrolytic machining of anesthesia puncture needles based on UV coating technology, characterized in that: include: S1. Establish an electric field simulation model of anesthesia puncture needle; S1 includes: S101, establishing a three-dimensional model of an anesthesia puncture needle and a cathode cutter used in actual processing; S102, meshing the anesthesia needle, the cathode cutter and the electrolyte therebetween, establishing an electric field model and setting the electric field model related parameters in the software, then calculating the electric field strength between the cathode cutter and the anesthesia puncture needle, and obtaining the electric field strength distribution at each point on the needle body surface of the anesthesia puncture needle; the electric field model related parameters include electrolyte conductivity, anode and cathode surface equilibrium point position, anode and cathode surface exchange current density and the electric field strength value on the surface of the anesthesia puncture needle when simulating the initial state of processing; S103, drawing an electric field intensity contour map according to the electric field intensity distribution; S2. Determine a first target coating area according to a preset electric field strength threshold and the electric field simulation model; the first target coating area is an area in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold; S3, selecting key nodes for the boundary of the first target coating area, and performing NURBS curve fitting according to the key nodes to generate a smooth curve boundary; S4. Determine whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If so, perform a UV insulating layer coating operation on the second target coating area; if not, adjust the weights of the key nodes, regenerate a smooth curve boundary until the second target coating area corresponding to the smooth curve boundary covers the first target coating area, and perform a UV insulating layer coating operation on the second target coating area.

2. The method for inhibiting stray corrosion of electrochemical machining of anesthesia puncture needles based on UV coating technology according to claim 1 is characterized in that: In S3, the key nodes are the cusp points and inflection points in the boundary of the first target coating area.

3. The method for inhibiting stray corrosion of electrolytic machining of anesthesia puncture needles based on UV coating technology according to claim 2, characterized in that: In S4, the coating operation of the second target coating area with a UV insulating layer includes: The anesthesia puncture needle is fixed and exposed to the UV ink spraying device; Uniformly coating the UV ink in the second target coating area by the UV ink spraying device; A strong ultraviolet lamp is used to irradiate the second target coating area, and the UV ink is cured under the ultraviolet light to form a UV insulating layer.

4. The method for inhibiting stray corrosion of electrochemical machining of anesthesia puncture needles based on UV coating technology according to claim 3 is characterized in that: Also includes: S5. After the electrolytic processing of the anesthesia puncture needle with a UV insulating layer is completed, the UV insulating layer is removed by soaking in ethanol and using a thin sheet with a hardness lower than that of the puncture needle material.

5. Anesthesia puncture needle electrochemical processing stray corrosion suppression system based on UV coating technology, characterized in that: Used to perform the method according to any one of claims 1 to 4, comprising: Establishing a module for establishing an electric field simulation model of an anesthesia puncture needle; A determination module, configured to determine a first target coating area according to a preset electric field strength threshold and the electric field simulation model; the first target coating area is an area in the electric field simulation model where the electric field strength is greater than the preset electric field strength threshold; A generating module, used for selecting key nodes for the boundary of the first target coating area, and performing NURBS curve fitting according to the key nodes to generate a smooth curve boundary; The judgment module is used to judge whether the second target coating area corresponding to the smooth curve boundary covers the first target coating area. If so, the second target coating area is coated with a UV insulating layer; if not, the weight of the key node is adjusted to regenerate the smooth curve boundary.

6. A computer storage medium, characterized in that: The computer storage medium stores a computer program; when the computer program is executed on a computer, the computer executes any one of the methods described in claims 1 to 4.

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