Lens barrel wall dispensing groove structure capable of replacing compression ring

Abstract

The invention discloses a lens barrel wall dispensing groove structure capable of replacing a compression ring, and the method comprises the steps: S1, carrying out the fine design of the dispensing groove structure, employing a unique wave-shaped continuous groove structure for a lens barrel wall dispensing groove, and enabling the wave period to be 5mm; s2, material and process collaborative innovation: a lens cone is made of a carbon fiber reinforced composite material and a titanium alloy material which are high in strength, low in thermal expansion coefficient and good in compatibility with glue; and S3, glue optimization and precise control of a dispensing process: selecting modified acrylate glue and silicone glue with high bonding strength, low elastic modulus, good weather resistance and optical transparency. A compression ring structure and related processing and assembling links are removed. A dispensing groove structure and an optimized assembly process enable the lens and the lens barrel to be tightly combined, and the influence of external factors such as temperature change, mechanical vibration and impact is effectively resisted. And the imaging definition and resolution are kept stable, the strict requirements of high-end optical instruments on the imaging quality are met, and the application field and environmental adaptability of the product are expanded.

Description

Technical Field

[0001] The invention relates to the field of optical technology, and in particular to a lens barrel wall glue dot groove structure capable of replacing a pressure ring. Background Art

[0002] In the assembly of traditional optical lens barrels, the pressure ring dispensing process has long dominated. However, this method has many disadvantages. On the one hand, the procurement, processing and assembly procedures of the pressure ring are cumbersome, which not only increases the cost of parts management, but also prolongs the production cycle, seriously restricts the improvement of production efficiency, and is difficult to meet the market demand for rapid iteration and large-scale production of modern optical products. On the other hand, the pressure ring structure is susceptible to factors such as temperature changes and mechanical vibrations during long-term use, resulting in a decrease in the assembly accuracy between the lens and the lens barrel, which in turn causes fluctuations in optical performance, such as image blur and optical axis offset. This reduces product reliability and stability, increases after-sales maintenance costs and user troubles. Therefore, the development of a new and efficient lens fixing structure has become a key issue that needs to be urgently addressed in the field of optical manufacturing. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a lens barrel wall glue dispensing groove structure that can replace the pressure ring. By removing the pressure ring structure and its related processing and assembly links, the cost of raw materials can be reduced, the production cycle can be shortened, manual operation and equipment occupancy time can be reduced, production efficiency can be greatly improved, and the price competitiveness of the product in the market can be enhanced.

[0004] The dispensing groove structure and optimized assembly process make the lens and the lens barrel tightly combined, effectively resisting the influence of external factors such as temperature changes, mechanical vibration and impact. The imaging clarity and resolution remain stable, which is far superior to the traditional pressure ring assembly method, significantly improving the reliability and service life of optical equipment, meeting the strict requirements of high-end optical instruments for imaging quality, and expanding the application field and environmental adaptability of the product.

[0005] The present invention also provides a lens barrel wall glue dispensing groove structure having the above-mentioned replaceable pressure ring, comprising:

[0006] S1. The dispensing groove structure is finely designed. The dispensing groove on the barrel wall adopts a unique wave-shaped continuous groove structure with a wave period of 5mm. The bottom of the dispensing groove is provided with a micro-nano structure texture;

[0007] S2. Collaborative innovation of materials and processes: The lens barrel is made of carbon fiber reinforced composite materials and titanium alloy materials with high strength, low thermal expansion coefficient and good compatibility with glue. Before dispensing, the surface of the lens barrel is treated with plasma at a power of 400W-600W and a treatment time of 10min-15min to increase the surface energy and enhance the adhesion between the glue and the lens barrel.

[0008] S3. Optimization of glue and precise control of dispensing process: Select modified acrylic glue and silicone glue with high bonding strength, low elastic modulus, good weather resistance and optical transparency. In the dispensing process, use high-precision jet dispensing equipment. According to the volume and shape of the dispensing slot, the amount of glue is accurately calculated through the intelligent control system, and the error of the glue amount is controlled within plus or minus 0.03mg.

[0009] According to a lens barrel wall glue dot groove structure that can replace a pressure ring provided by the present invention, the depth difference between the crest and the trough is in the range of 0.15mm-0.25mm, which increases the contact area between the glue and the lens barrel wall, improves the bonding force, and can effectively disperse the stress of the lens in different directions.

[0010] According to the present invention, a glue dot groove structure on the lens barrel wall that can replace the pressure ring is provided. The texture depth is 100nm-200nm, and the spacing is 300nm-500nm. Capillary action is used to promote uniform distribution of glue in the groove, ensuring a better glue filling effect and further enhancing the reliability of lens fixation.

[0011] According to a glue dot groove structure on the lens barrel wall that can replace a pressure ring provided by the present invention, the carbon fiber reinforced composite material adopts a hot press molding process, the curing temperature is controlled at 180°C-220°C, the curing pressure is 5MPa-8MPa, and the heat preservation and pressure holding time is 2h-3h, ensuring that the fiber volume content of the lens barrel is 50%-60% to obtain excellent mechanical properties and dimensional stability.

[0012] According to a lens barrel wall glue dispensing groove structure that can replace a pressure ring provided by the present invention, the titanium alloy lens barrel is manufactured by a process that combines precision forging and CNC machining, the forging temperature is 800°C-950°C, the forging ratio is controlled at 3-5, and the cutting parameters are strictly controlled during the machining process to ensure that the surface roughness of the lens barrel is lower than Ra0.4μm and the dimensional tolerance is within plus or minus 0.02mm.

[0013] According to the present invention, a glue dispensing groove structure on the lens barrel wall that can replace the pressure ring is provided. The glue optimization and glue dispensing process are precisely controlled. According to the curing characteristics of the glue, a UV lamp heating combined curing method is adopted. First, the UV intensity is 800mW / cm 2 -1200mW / cm 2 Irradiate for 30s-60s, then heat at 60℃-80℃ for 2h to completely cure the glue and achieve a stable bond between the lens and the lens barrel.

[0014] According to the present invention, a glue dispensing groove structure on the lens barrel wall that can replace the pressure ring is provided. The glue optimization and glue dispensing process are precisely controlled, the glue dispensing speed is dynamically adjusted within 3mm / s-6mm / s, and the glue dispensing needle maintains a constant distance of 0.5mm-1mm from the lens barrel wall, ensuring that the glue can be accurately sprayed into the glue dispensing groove and avoiding glue splashing and bubble generation.

[0015] Compared with the prior art, the present invention provides a lens barrel wall glue dispensing groove structure that can replace the pressure ring, eliminates the pressure ring structure and its related processing and assembly links, can reduce raw material costs, shorten production cycles, reduce manual operations and equipment occupancy time, greatly improve production efficiency, and enhance product price competitiveness in the market.

[0016] Compared with the prior art, the present invention has a glue-dispensing groove structure on the lens barrel wall that can replace the pressure ring. The glue-dispensing groove structure and the optimized assembly process enable the lens and the lens barrel to be tightly combined, effectively resisting the influence of external factors such as temperature changes, mechanical vibrations and impacts. The imaging clarity and resolution remain stable, which is far superior to the traditional pressure ring assembly method, significantly improving the reliability and service life of optical equipment, meeting the strict requirements of high-end optical instruments for imaging quality, and expanding the application field and environmental adaptability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a cross-sectional view of a lens barrel of a lens barrel wall glue dispensing groove structure that can replace a pressure ring according to the present invention;

[0019] Figure 2 It is a partial schematic diagram of a cross-section of a lens barrel of the present invention, which is a lens barrel wall glue dispensing groove structure that can replace a pressure ring;

[0020] Figure 3 The present invention is a top view of a glue dispensing groove structure on the lens barrel wall that can replace the pressure ring. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] Embodiment 1:

[0023] Reference Figure 1-3 , an embodiment of the present invention provides a lens barrel wall glue dispensing groove structure that can replace a pressure ring, comprising:

[0024] Material preparation and barrel molding: The carbon fiber prepreg is cut and laid according to the designed ply angle and sequence. The ply angles include 0°, 45°, and 90°, and the total number of plies is 10. The laid prepreg is placed in the autoclave mold and cured in a vacuum environment. During the curing process, the heating rate is controlled at 1℃ / min-2℃ / min. After reaching the curing temperature of 200℃, it is kept warm for 2.5 hours, and the curing pressure is maintained at 6MPa. After the curing is completed, the barrel is demoulded and machined. The CNC machining center is used to accurately machine the dispensing groove and other installation interfaces to ensure that the outer diameter tolerance of the barrel is plus or minus 0.03mm, the inner diameter tolerance is plus or minus 0.02mm, the height tolerance is plus or minus 0.04mm, and the surface roughness reaches Ra0.5μm.

[0025] Surface treatment and glue slot processing: plasma etching equipment is used to process the surface of the lens barrel. The processing gas is a mixture of oxygen and argon, with a flow ratio of 1:3, a processing power of 500W, and a processing time of 12 minutes. The glue slot processing adopts precision milling technology, using a carbide milling cutter with a diameter of 0.8mm, a cutting speed of 80m / min, a feed rate of 0.04mm / r, and the milling depth is adjusted between 0.2mm and 0.3mm according to the design requirements of the glue slot. Cutting fluid is used for cooling and lubrication during the processing to ensure processing quality and tool life.

[0026] Glue dispensing and assembly process: Use modified acrylic glue, and perform vacuum degassing on the glue before gluing for 8 minutes. Load the degassed glue into the barrel of the jet glue dispensing equipment, and set the glue dispensing program according to the parameters of the lens barrel glue dispensing slot: the glue dispensing pressure is 0.3MPa, the glue dispensing speed is 4mm / s, and the needle is 0.8mm away from the lens barrel wall. During the gluing process, the visual inspection system is used to monitor the glue filling situation in real time to ensure that the glue is evenly and accurately filled into the glue dispensing slot. Carefully place the lens in the lens barrel, and use the positioning tooling to ensure that the center position deviation of the lens is within plus or minus 0.02mm. After the gluing is completed, first place the lens barrel in a UV curing device at 1000mW / cm 2 The lens is then exposed to ultraviolet light for 45 seconds and then placed in a constant temperature oven and heated at 70°C for 1.5 hours to completely cure the glue. After curing, the assembled lens barrel is subjected to a comprehensive optical performance test and mechanical strength test, including the use of an optical transfer function measuring instrument to detect the imaging quality and the use of a tensile testing machine to test the bonding strength between the lens and the lens barrel to ensure that the product quality meets the design standards.

[0027] Embodiment 2:

[0028] Reference Figure 1-3 , an embodiment of the present invention provides a lens barrel wall glue dispensing groove structure that can replace a pressure ring, comprising:

[0029] Material preparation and lens barrel processing: Titanium alloy bars of appropriate specifications are selected and processed by blanking, forging and annealing. During the forging process, the heating temperature is controlled at 850℃, the forging ratio is 4, and multiple upsetting and drawing processes are used to improve the internal structure and performance of the material. The annealing treatment is kept at 700℃ for 2h to eliminate the forging stress. The annealed blank is CNC machined, and the rough turning, semi-finishing turning and finishing processes are carried out in sequence. The rough turning cutting speed is 180m / min, the feed rate is 0.15mm / r, and the back cutting amount is 0.8mm; the semi-finishing turning cutting speed is 250m / min, the feed rate is 0.08mm / r, and the back cutting amount is 0.3mm; the finishing turning cutting speed is 320m / min, the feed rate is 0.05mm / r, and the back cutting amount is 0.1mm, and the lens barrel blank is processed. Then the glue dispensing groove is milled. The milling cutter is a 1mm diameter carbide milling cutter, the cutting speed is 100m / min, the feed rate is 0.06mm / r, and the milling depth is 0.22mm to ensure the dimensional accuracy and surface quality of the glue dispensing groove.

[0030] Surface treatment and anodizing: Chemical degreasing and pickling treatment are carried out on the processed lens barrel to remove surface oil and oxide scale. The surface of the lens barrel is treated by anodizing process, the electrolyte is sulfuric acid solution, the concentration is 18%, the oxidation voltage is 18V, the oxidation time is 35min, and an oxide film with a thickness of about 8μm is formed. After oxidation, a sealing treatment is carried out, using the nickel salt sealing method, and the sealing time is 18min to improve the corrosion resistance and wear resistance of the oxide film.

[0031] Glue dispensing and assembly operation: Use silicone glue, stir the glue evenly and then load it into the glue dispensing equipment. Calculate the glue amount according to the volume of the glue dispensing tank and the weight of the lens, and set the glue dispensing parameters: glue dispensing pressure 0.28MPa, glue dispensing speed 5mm / s, and needle distance 0.6mm from the lens barrel wall. During the glue dispensing process, use pressure sensors and flow sensors to monitor the glue dispensing pressure and glue amount in real time to ensure the stability of the glue dispensing process. After placing the lens in the lens barrel, use a combination of ultraviolet lamps and heating plates for curing. First, at 900mW / cm 2 Irradiate under ultraviolet light for 50 seconds, and then heat on a heating plate at 75℃ for 1.2 hours to fully cure the glue. After curing, strict quality inspection is carried out, including using interferometer to detect the surface accuracy and optical axis parallelism of the lens, and testing the reliability of assembly through drop test and vibration test to ensure that the product meets the use requirements of optical equipment.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A lens barrel wall glue dispensing groove structure that can replace a pressure ring, characterized in that: include: S1. The dispensing groove structure is finely designed. The dispensing groove on the barrel wall adopts a unique wave-shaped continuous groove structure with a wave period of 5mm. The bottom of the dispensing groove is provided with a micro-nano structure texture; S2. Collaborative innovation of materials and processes: The lens barrel is made of carbon fiber reinforced composite materials and titanium alloy materials with high strength, low thermal expansion coefficient and good compatibility with glue. Before dispensing, the surface of the lens barrel is treated with plasma at a power of 400W-600W and a treatment time of 10min-15min to increase the surface energy and enhance the adhesion between the glue and the lens barrel. S3. Optimization of glue and precise control of dispensing process: Select modified acrylic glue and silicone glue with high bonding strength, low elastic modulus, good weather resistance and optical transparency. In the dispensing process, use high-precision jet dispensing equipment. According to the volume and shape of the dispensing slot, the amount of glue is accurately calculated through the intelligent control system, and the error of the glue amount is controlled within plus or minus 0.03mg.

2. A lens barrel wall glue dispensing groove structure that can replace a pressure ring according to claim 1, characterized in that: The depth difference between the wave crest and the wave trough is within the range of 0.15 mm to 0.25 mm, which increases the contact area between the glue and the lens barrel wall, improves the bonding force, and can effectively disperse the stress of the lens in different directions.

3. The lens barrel wall glue dispensing groove structure that can replace the pressure ring according to claim 1 is characterized in that: The texture depth is 100nm-200nm, and the spacing is 300nm-500nm. The capillary action is used to promote the uniform distribution of glue in the groove, ensure a better glue filling effect, and further enhance the reliability of lens fixation.

4. The lens barrel wall glue dispensing groove structure that can replace the pressure ring according to claim 1 is characterized in that: The carbon fiber reinforced composite material adopts a hot-press molding process, with a curing temperature controlled at 180° C.-220° C., a curing pressure of 5 MPa-8 MPa, and a heat preservation and pressure holding time of 2 h-3 h, ensuring that the fiber volume content of the lens barrel is 50%-60% to obtain excellent mechanical properties and dimensional stability.

5. The lens barrel wall glue dispensing groove structure that can replace the pressure ring according to claim 1 is characterized in that: The titanium alloy lens barrel is manufactured through a process combining precision forging and CNC machining. The forging temperature is 800°C-950°C, the forging ratio is controlled at 3-5, and the cutting parameters are strictly controlled during the machining process to ensure that the surface roughness of the lens barrel is lower than Ra0.4μm and the dimensional tolerance is within plus or minus 0.02mm.

6. The lens barrel wall glue dispensing groove structure capable of replacing a pressure ring according to claim 1, characterized in that: The glue optimization and dispensing process are precisely controlled. According to the curing characteristics of the glue, a UV lamp heating combined curing method is used. First, the UV intensity is 800mW / cm 2 -1200mW / cm 2 Irradiate for 30s-60s, then heat at 60℃-80℃ for 2h to completely cure the glue and achieve a stable bond between the lens and the lens barrel.

7. The lens barrel wall glue dispensing groove structure capable of replacing a pressure ring according to claim 1, characterized in that: The glue optimization and dispensing process are precisely controlled, the dispensing speed is dynamically adjusted within 3mm / s-6mm / s, and the dispensing needle maintains a constant distance of 0.5mm-1mm from the barrel wall, ensuring that the glue can be accurately sprayed into the dispensing groove and avoiding glue splashing and bubble generation.

Images