Full-automatic vacuum coating machine for optical lens and control system of full-automatic vacuum coating machine

Abstract

The invention belongs to the technical field of vacuum coating machines, and particularly relates to a full-automatic vacuum coating machine for optical lenses and a control system of the full-automatic vacuum coating machine, the full-automatic vacuum coating machine comprises a machine body, a vacuum unit, a coating unit, an electrical control unit, a heating unit and a cooling unit; the coating unit comprises a substrate frame, and the substrate frame is rotationally connected into the machine body; the motor drives the substrate plate to rotate through the driving shaft, the substrate plate drives the lens to rotate in the substrate frame, and when the substrate frame is in contact with the pressure sensor after being turned over, the pressure sensor triggers and controls the motor to stop rotating and keep fixed, so that turning over of the lens in the coating process is achieved, and a coating machine is prevented from being started in the coating process; the vacuum coating machine has the advantages that the internal environment of the coating machine is affected, the lens expands with heat and contracts with cold due to the influence of the temperature and humidity environment, and the film structure is damaged, so that the lens coating effect is improved, and the use convenience of the vacuum coating machine is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum coating machines, and specifically relates to a fully automatic vacuum coating machine for optical lenses and its control system. Background Art

[0002] A vacuum coating machine is a device used to deposit various thin films on the surface of objects and is widely used in multiple fields such as optics, electronics, and decoration; a vacuum coating machine includes a vacuum system, an evaporation source, a substrate holder, and a coating material supply system; the coating of lenses by a vacuum coating machine includes two major categories: Physical vapor deposition: In a vacuum environment, the evaporation source heats and evaporates the coating material into gaseous atoms or molecules, and these gaseous particles fly towards the surface of the lens at a certain speed and direction; due to the relatively low temperature of the lens surface, the gaseous particles cool and condense on the lens surface to form a thin film; by controlling the temperature of the evaporation source, the evaporation time, and the type and amount of the coating material, the thickness and composition of the thin film can be precisely controlled. Chemical vapor deposition: Using gaseous chemical substances to undergo chemical reactions under the action of high temperature, catalysts, etc., to generate solid thin films on the surface of the lens; for example, introducing gaseous compounds containing elements such as silicon and oxygen into the coating chamber, and under certain conditions, these compounds decompose and undergo chemical reactions to form thin films such as silicon dioxide on the lens surface; compared with PVD, CVD can be carried out at a lower temperature, and the adhesion and uniformity of the thin film are better.

[0003] However, in the actual use process, a large number of lenses need to be installed on the substrate holder, which will cause the lenses to stay in the outside world for a long time, and during the process of personnel installing the lenses, there will be frequent back-and-forth movements, taking tools for installation and other operations that generate dust, making the lenses more likely to be contaminated with dust before coating, affecting the optical performance of the lenses, and damaging the film layer structure of the lens coating; moreover, after the lenses are installed, it is also necessary to detect whether there is dust adhered to the surface, which will further extend the residence time of the lenses; in addition, after the lenses are coated, the cooling methods and cooling times of different lenses are also different, which requires the lenses to be taken out of the coating machine for additional cooling or heat preservation, but during the taking-out process, the temperature of the coated lenses is relatively high, and direct exposure to the outside will cause the lenses and the film layer to expand and contract thermally, affecting the coating effect. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve the above technical problems; the present invention proposes a fully automatic vacuum coating machine for optical lenses and its control system.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes a fully automatic vacuum coating machine for optical lenses and a control system thereof, comprising a machine body, a vacuum unit, a coating unit, an electrical control unit, a heating unit and a cooling unit; the coating unit comprises: A substrate rack, the substrate rack is rotatably connected to the machine body, and the top of the substrate rack is connected to the driving device built into the machine body, the inner ring of the substrate rack is annularly distributed with rectangular areas, the rectangular area of ​​the substrate rack is rotatably connected with a substrate plate, mounting grooves are evenly opened on the substrate plate, the inner wall of the mounting groove is threadedly connected with a screw rod, and one end of the screw rod is rotatably connected with a rotating block; a fixing ring is arranged between adjacent rotating blocks, and the fixing ring is composed of a plurality of I-shaped rods hinged to each other, and a rubber ring is arranged on the inner ring of the fixing ring, and the lens is installed in the rubber ring; A driving shaft is rotatably connected to the edge of the substrate rack, one end of the driving shaft is connected to the substrate plate, and the other end is connected to the motor installed on the substrate rack; an extrusion rod is hinged on the inner ring of the substrate rack through a torsion spring, the extrusion rod is made of high-temperature resistant plastic, and a pressure sensor is provided on the extrusion rod, which is in contact with the substrate plate.

[0006] Preferably, a sealing cover is evenly installed on the substrate rack, and the sealing cover seals the top and bottom of the substrate plate, the inner wall of the sealing cover is provided with a heat-insulating material, a heating component is provided in the heat-insulating material, and a rubber strip is provided at the edge of the outer ring of the sealing cover, and the rubber strip is in contact with the substrate rack; a sliding rod is slidably connected inside the sealing cover, and the sliding rod slides around the center of the substrate rack, a driving assembly is installed on the top of the sealing cover, and the driving assembly is connected to the sliding rod, and the driving assembly drives the sliding rod to move horizontally and vertically in the sealing cover; a detection device is installed on the sealing cover, a nozzle is evenly provided on one side of the sliding rod, and the probe in the detection device is located at the bottom center of the sliding rod, the nozzle is located on one side of the sliding rod, and a unidirectional suction nozzle is provided on the top of the sealing cover.

[0007] Preferably, a cleaning brush is provided on the side of the slide rod away from the nozzle, and a sticky mesh tube is provided on one side of the cleaning brush. The sticky mesh tube is away from the nozzle, and the sticky mesh tube is composed of multiple hollow tubes connected.

[0008] Preferably, a vibrating rod is provided between the sliding rod and the cleaning brush. The vibrating rod is hinged to the sliding rod through a torsion spring. The bottom of the vibrating rod is in a grid-like shape to encircle the cleaning brush. Shifting blocks are evenly provided on the top of the sealing cover, and the top of the vibrating rod contacts the shifting blocks.

[0009] Preferably, suction holes are evenly opened on the sticky net tube, the bottom of the sticky net tube is closed, and the top is connected to the suction nozzle through an air pipe.

[0010] Preferably, a ventilation pipe is provided in the sealing cover, and a temperature and humidity sensor is provided in the ventilation pipe, one end of the ventilation pipe is connected to the sealing cover through a valve, and the other end is connected to the nozzle, and the ventilation pipe is located in the insulation material and close to the heating component.

[0011] Preferably, baffles are evenly arranged at the bottom of the sliding rod, and the baffles are symmetrically distributed on both sides of the lens, and the lens is located between adjacent baffles.

[0012] Preferably, a centering marking device is provided on one side of the baffle close to the center of the sliding rod, and the centering marking device is used to assist the detection device in detecting the position of the lens.

[0013] Preferably, a single brush in the cleaning brush is circular, and the cleaning brush is made of a soft material.

[0014] A control system for a full-automatic vacuum coating machine for optical lenses, the control system includes a hardware system and a software system, the hardware system includes a central processing unit, sensors, actuators and a human-machine interface, and the software system includes a control program, a monitoring software and a diagnostic alarm program.

[0015] The beneficial effects of the present invention are as follows: 1. For the full-automatic vacuum coating machine for optical lenses and its control system of the present invention, when installing the lens, the worker rotates the screw through a tool and screws the screw into the inner wall of the installation groove. When the screw rotates, the rotating block is restricted by the fixing ring and does not rotate. The screws in the installation groove move away from each other as they are screwed in, driving the fixing ring to expand from the inside to the outside until the fixing ring and the rubber ring expand or deform to conform to the shape of the lens. In this way, the variety of lenses that can be adapted for each coating can be increased, such as lenses of the same type of coating but different shapes, or the cumbersome operations of frequently replacing the substrate holder according to the lens shape, improving the convenience of using the vacuum coating machine, and thus improving the practicality of the vacuum coating machine.

[0016] 2. For the full-automatic vacuum coating machine for optical lenses and its control system of the present invention, the motor drives the substrate plate to rotate through the drive shaft, and the substrate plate drives the lens to rotate in the substrate holder. When the substrate holder turns over and touches the pressure sensor, the pressure sensor triggers to control the motor to stop rotating and remain fixed, realizing the turning over of the lens during the coating process, avoiding opening the coating machine during the coating process, resulting in the imbalance of the internal vacuum degree of the coating machine, the influence on the temperature and humidity environment, the extension of the coating time, the reduction of the coating efficiency, and more likely the lens will have thermal expansion and contraction effects due to the influence of the temperature and humidity environment, resulting in the damage of the film layer structure. Thus, while improving the coating effect of the lens, the convenience of using the vacuum coating machine is also improved. Description of the Drawings

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a partial three-dimensional view of the substrate holder; Figure 3 is a partial cross-sectional view of the substrate holder; Figure 4 It is a schematic diagram of the substrate plate for installing circular lenses and elliptical lenses; Figure 5 It is a schematic diagram of the slide bar cleaning the lens; Figure 6 It is a cross-sectional view of the slide bar; Figure 7 It is a schematic diagram of the fixing ring; Figure 8 It is a schematic diagram of the ventilation pipe inside the sealing cover; Figure 9 It is a schematic diagram of the vibrating rod separating the cleaning brush; Figure 10 It is a three-dimensional view of the vibrating rod; Figure 11 It is a three-dimensional view of the extrusion rod; Figure 12 It is a comparison diagram of the cleaning of the loop-shaped bristles and the conventional bristles.

[0019] In the figure: machine body 1, substrate holder 11, drive device 12, substrate plate 13, installation groove 14, screw 15, rotating block 16, fixing ring 17, rubber ring 18, drive shaft 19, motor 2, extrusion rod 21, pressure sensor 22, sealing cover 23, heat insulation material 24, heating component 25, rubber strip 26, slide bar 27, drive component 28, detection device 29, nozzle 3, suction nozzle 31, cleaning brush 32, sticky net tube 33, vibrating rod 34, dial block 35, suction hole 36, ventilation pipe 37, baffle 38, centering marking device 39. Specific Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1:

[0022] In order to effectively solve the above problems, as shown in the accompanying drawings of the specification Figures 1 - 12 shown, a fully automatic vacuum coating machine for optical lenses includes a machine body 1, a vacuum unit, a coating unit, an electrical control unit, a heating unit and a cooling unit; the coating unit includes: A substrate frame 11, wherein the substrate frame 11 is rotatably connected to the body 1, and the top of the substrate frame 11 is connected to a driving device 12 built into the body 1, and a rectangular area is distributed in an annular manner in the inner circle of the substrate frame 11, and a substrate plate 13 is rotatably connected in the rectangular area of ​​the substrate frame 11, and mounting grooves 14 are evenly provided on the substrate plate 13, and a screw rod 15 is threadedly connected to the inner wall of the mounting groove 14, and a rotating block 16 is rotatably connected to one end of the screw rod 15; a fixing ring 17 is provided between adjacent rotating blocks 16, and the fixing ring 17 is composed of a plurality of I-shaped rods hinged to each other, and a rubber ring 18 is provided in the inner circle of the fixing ring 17, and the lens is installed in the rubber ring 18; A driving shaft 19, wherein the driving shaft 19 is rotatably connected to the edge of the substrate frame 11, and one end of the driving shaft 19 is connected to the substrate plate 13, and the other end is connected to the motor 2 installed on the substrate frame 11; an extrusion rod 21 is hinged to the inner ring of the substrate frame 11 through a torsion spring, and the extrusion rod 21 is made of high-temperature resistant plastic, and a pressure sensor 22 is provided on the extrusion rod 21, and the pressure sensor 22 is in contact with the substrate plate 13; The driving device 12 is a conventional device in the coating machine, which consists of a motor 2, a reducer and a transmission part. After the lens is installed, the worker installs the substrate rack 11 into the vacuum coating machine and connects it to the driving device 12. The driving device 12 drives the substrate rack 11 to rotate, and the substrate rack 11 drives the lens to rotate; the rubber ring 18 is a conventional part used to fix and install the lens; the motor 2 is a conventional driving part, and the motor 2 is a high temperature resistant type, which is suitable for the internal working environment of the coating machine. The motor 2 is connected to the pressure sensor 22. The worker sets the motor 2 to rotate half a circle periodically, and the motor 2 drives the substrate rack 11 to rotate half a circle and turn over. When the substrate rack 11 passes the pressure sensor 22, The pressure sensor 22 is not triggered. When the substrate rack 11 contacts the pressure sensor 22 again after being turned over, the pressure sensor 22 triggers the control motor 2 to stop rotating and remain fixed, thereby realizing the turning over of the lens during coating. The pressure sensor 22 is a conventional electrical appliance, such as a full silicon carbide high-temperature pressure sensor 22, which can work during the coating process. If the coating situation is special, there is no need to use the motor 2. Since the motor 2 is installed on the edge of the substrate rack 11, it is convenient for workers to disassemble and assemble. The workers can turn over the substrate rack 11 by themselves, and then fix the substrate rack 11 after centering detection and other operations, thereby completing the purpose of turning over the lens for coating. The screw 15 rotates, but the rotating block 16 is fixed and does not rotate due to the influence of the rubber ring 18 and the like.

[0023] Specific working process: When installing the lens, the worker rotates the screw 15 through a tool and screws the screw 15 into the inner wall of the installation groove 14. When the screw 15 rotates, the rotating block 16 is restricted by the fixing ring 17 and does not rotate. The screws 15 in the installation groove 14 move away from each other as they are screwed in, driving the fixing ring 17 to expand from the inside out. For example, the fixing ring 17 expands from an elliptical shape to a circular shape. The specific shape of the expansion of the fixing ring 17 is determined by the lens to be coated. Until the fixing ring 17 and the rubber ring 18 expand or deform to conform to the shape of the lens, that is, when the lens is circular, the fixing ring 17 and the rubber ring 18 expand to a circular shape, and when the lens is elliptical, the fixing ring 17 and the rubber ring 18 expand to an elliptical shape. In this way, the types of lenses that can be adapted for each coating can be increased, such as lenses of the same coating type but different shapes, or cumbersome operations such as frequently replacing the substrate holder 11 according to the lens shape, improving the convenience of using the vacuum coating machine, and thus improving the practicality of the vacuum coating machine; The worker places the lens in the middle of the rubber ring 18. At this time, the lens is located in the middle of the I-shaped fixing ring 17. The protruding parts at the top and bottom of the fixing ring 17 press against the top and bottom of the edge of the lens through the rubber ring 18 to clamp the lens, improving the stability during the coating process; moreover, when installing the lens, the worker unscrews the screw 15 from the inner wall of the installation groove 14, and the screw 15 drives the fixing ring 17 and the rubber ring 18 to contract inward to fix the lens; furthermore, the worker can also use a torque wrench to drive the screw 15 to rotate. A torque wrench is also called a torque adjustable wrench, which is a type of wrench. For example, the fixing torques of glass lenses and resin lenses are different. When the worker fixes a glass lens, the torque value is set in advance for the torque wrench. When the worker twists the screw 15 with the torque wrench to fix the glass lens, after the required torque value for fixing reaches the set value, the torque wrench emits a prompt sound, indicating that the force required to fix this screw 15 to the glass lens has been reached, and this cycle continues until the lens fixing is completed. Fixing the lens in this way can fix different materials of lenses with different forces, and in addition, the preset torque fixing effect can be more accurately achieved through the torque wrench; Furthermore, the fixing ring 17 contacts the lens through the rubber ring 18, which can better protect the lens itself and play a role in damping during the process of turning the lens over. If the lens needs to be coated on both sides, during the lens coating process, the motor 2 is started at an appropriate interval. The worker can perform conventional control operations such as wireless startup or preset time. The motor 2 drives the substrate plate 13 to rotate through the drive shaft 19. The substrate plate 13 pushes open the extrusion rod 21. At this time, the pressure sensor 22 is not triggered. The extrusion rod 21 drives the pressure sensor 22 away from the substrate plate 13. The substrate plate 13 drives the lens to rotate within the substrate holder 11. When the substrate holder 11 contacts the pressure sensor 22 after turning over, the pressure sensor 22 triggers to control the motor 2 to stop rotating and remain fixed, realizing the turning over of the lens during the coating process, avoiding opening the coating machine during the coating process, which affects the internal environment of the coating machine, prolongs the coating time, reduces the coating efficiency, and may also cause the lens to expand and contract due to the influence of temperature and humidity environment, resulting in the destruction of the film layer structure. Thus, while improving the lens coating effect, the convenience of using the vacuum coating machine is improved. Moreover, the worker can also reflect whether the substrate plate 13 is turned to the horizontal state through the pressure value generated by the contact between the pressure sensor 22 and the substrate plate 13, completing the self-check effect of the horizontal state after turning over and improving the convenience of use.

[0024] Embodiment 2:

[0025] On the basis of Embodiment 1, sealing covers 23 are evenly installed on the substrate holder 11. The sealing covers 23 seal the top and bottom of the substrate plate 13. The inner wall of the sealing cover 23 is provided with a heat-insulating material 24. A heating component 25 is arranged in the heat-insulating material 24. A rubber strip 26 is arranged at the outer edge of the outer circle of the sealing cover 23. The rubber strip 26 contacts the substrate holder 11. A sliding rod 27 is slidably connected in the sealing cover 23. The sliding rod 27 slides around the center of the substrate holder 11. A driving component 28 is installed at the top inside the sealing cover 23. The driving component 28 is connected to the sliding rod 27. The driving component 28 drives the sliding rod 27 to move horizontally and vertically inside the sealing cover 23. A detecting device 29 is installed on the sealing cover 23. Spray nozzles 3 are evenly arranged on one side of the sliding rod 27. The probe in the detecting device 29 is located at the center of the bottom of the sliding rod 27. The spray nozzles 3 are located on one side of the sliding rod 27. A one-way suction nozzle 31 is arranged at the top of the sealing cover 23. A cleaning brush 32 is arranged on the side of the sliding rod 27 away from the spray nozzles 3. A sticky net tube 33 is arranged on one side of the cleaning brush 32. The sticky net tube 33 is away from the spray nozzles 3. The sticky net tube 33 is composed of a plurality of hollow tubes connected together. The driving component 28 is a conventional electric guide rail mechanism, which consists of a linear guide rail and an electric slider. For example, the linear guide rail drives the slide bar 27 to move along the X-axis, and the electric slider drives the slide bar 27 to move along the Y-axis. This driving component 28 is applied to equipment such as CNC lathes and engraving machines in the market; the heating component 25 is a conventional electric heating device, and the heat preservation material 24 is a material conventionally used for lens heat preservation and cooling; The detection device 29 is a device conventionally used to detect the surface cleanliness of the lens. For example, a machine vision inspection instrument, which consists of a camera, a light source, image processing software, etc. It does not require manual operation. The camera takes an image of the lens surface, and then the image processing software analyzes the image to identify and detect defects such as pollutants and scratches on the surface. This instrument can automatically judge whether the surface cleanliness of the lens meets the preset standard; moreover, the machine vision inspection instrument can also automatically detect the installation accuracy of the lens; first, it identifies the edge or specific marking features of the lens, as well as the corresponding features of the mounting seat; then, it calculates the position deviation and angle deviation of the lens relative to the mounting groove 14, and can achieve centering measurement and adjustment to ensure the accuracy of the lens installation position, thereby improving the lens installation accuracy and avoiding large deviations in the lens installation accuracy from affecting the coating effect; The nozzle 3 is connected to a conventional air pump unit equipped in the workshop through a hole at the top of the sealing cover 23. The air pump unit sprays clean air dedicated to cleaning the lens towards the nozzle 3, and the air pump unit sucks the air inside the sealing cover 23 through the suction nozzle 31.

[0026] Specific working process: After the lenses on a substrate plate 13 are installed, two sealing covers 23 are installed up and down in the substrate holder 11 to cover the substrate plate 13. The sealing cover 23 is attached to the inner wall of the substrate holder 11 through the rubber strip 26 to seal the surrounding environment of the substrate plate 13. Then, air is sucked into the sealing cover 23 through the suction nozzle 31 to form a low-vacuum environment. In a vacuum environment, the number of air molecules is greatly reduced, and dust particles lose the buoyancy of the air and the carrying effect of the air flow. Their movement and settlement methods are different from those in the atmospheric environment; this makes it difficult for dust to settle naturally on the lens surface, thereby reducing the probability of the lens being re-contaminated by dust during the waiting process for coating; When the lens is in a vacuum environment, the dust originally attached to the lens surface will have its adhesion weakened due to the reduction of the surrounding air pressure. At the same time, the interference of air resistance in the vacuum environment is weakened. At this time, the nozzle 3 blows clean gas onto the lens surface, and the dust is more likely to detach from the lens surface and be sucked away and collected by the suction nozzle 31, improving the cleaning degree of the lens surface, thereby enhancing the coating effect of the lens. Moreover, the vacuum environment is cleaner than the surrounding environment exposed to the outside world, and the propagation characteristics of the light of the detection device 29 are relatively stable in it, without interference factors such as dust scattering light in the atmosphere. This enables the detection device 29 to more clearly observe the dust situation on the lens surface, facilitating workers to adopt targeted cleaning measures. Also, when the lens is waiting to be placed into the coating machine after installation, it is in the sealing cover 23, and the outside light cannot enter the inside of the sealing cover 23, reducing the influence of the outside light on the detection device 29, improving the detection accuracy of the cleaning degree of the lens surface, thus enhancing the detection accuracy and further improving the cleaning degree of the lens. After evacuating the inside of the sealing cover 23, the driving assembly 28 drives the sliding rod 27 to move, and the lenses are detected one by one. If the cleaning degree of a certain lens is detected to be unqualified, the lens at this position is marked. After the lenses on a substrate plate 13 are detected, the marked lenses are blown and cleaned. At this time, the sealing cover 23 temporarily loses the vacuum environment during the blowing and cleaning operation. After the blowing and cleaning is completed, it is pumped down to a low vacuum environment again, and then the cleaning degree of the marked lenses is detected until the lenses are qualified. If the lenses are still unqualified, the marked lenses are labeled. The inside of the sealing cover 23 is selected to be in a low vacuum environment or restored according to the actual situation, and the labeled unqualified lenses are processed subsequently after coating. During the waiting process of the lens for coating, the heating assembly 25 preheats the inside of the sealing cover 23. Preheating the lens can increase the temperature of the lens surface and intensify the molecular movement. When the coating material is deposited on the lens surface, it can better interact with the molecules on the lens surface, form stronger chemical bonds or physical adsorption, thereby enhancing the adhesion between the film layer and the lens, making the film layer not easy to fall off, and improving the coating effect of the lens. If the lens is not preheated before coating, the deposition of the coating material during the coating process will cause the temperature of the lens surface to change, resulting in thermal stress inside the lens. Preheating the lens can make the lens be in a relatively high and uniform temperature state before coating, reducing the thermal stress generated by the temperature change during the coating process, and avoiding problems such as cracks in the film layer or deformation of the lens caused by stress concentration, improving the stability and durability of the lens and the film layer. Furthermore, when heating the small chamber formed inside the sealing cover 23, due to the small space of the small chamber, the heat propagation path therein is relatively short, making it easier to achieve uniform temperature distribution; the heating or cooling source can act more uniformly on each part inside the chamber, reducing the situation of local overheating or overcooling; while in the large chamber of the vacuum coating machine, the heat needs to propagate in a larger space and is easily affected by factors such as air flow and chamber structure, resulting in uneven temperature distribution and increasing the difficulty and complexity of temperature control, thereby contributing to the heating before lens coating and the cooling after coating, and further improving the coating effect of the coating machine on the lens; If the dust cannot be removed by blowing air, the driving component 28 drives the cleaning brush 32 dedicated for the lens to move closer to the lens through the sliding rod 27, and the movement of the sliding rod 27 drives the cleaning brush 32 to clean the surface of the lens, removing the impurities on the lens surface and improving the lens cleanliness; after the cleaning is completed, the cleaning brush 32 moves to one side of the lens, the nozzle 3 blows air towards the lens and the suction nozzle 31 sucks air, and the air flow enters the cleaning brush 32 after passing through the lens, blowing the dust trapped in the cleaning brush 32 towards the direction of the suction nozzle 31, forming a relatively fixed air flow path, avoiding the situation where the air flow carries dust and scatters everywhere, affecting other lenses; moreover, when the air flow takes out the dust in the cleaning brush 32, it passes through the sticky net tube 33, and the sticky net tube 33 adheres to the dust, reducing the dust carried by the air flow and reducing the range of the dust carried by the air flow moving, thereby improving the cleanliness inside the sealing cover 23; furthermore, blowing air can also clean the cleaning brush 32, improving the cleanliness of the cleaning brush 32 during continuous operation.

[0027] Embodiment Three:

[0028] Based on Embodiment Two, a vibrating rod 34 is provided between the sticky net tube 33 and the cleaning brush 32 on the sliding rod 27. The vibrating rod 34 is hinged to the sliding rod 27 through a torsion spring. The bottom of the vibrating rod 34 is in a grid shape and surrounds the cleaning brush 32. The top of the sealing cover 23 is evenly provided with a dial block 35, and the top of the vibrating rod 34 contacts the dial block 35; one hole in the grid at the bottom of the vibrating rod 34 surrounds a part of the cleaning brush 32, and the other hole surrounds another part of the cleaning brush 32 until all the cleaning brushes 32 are surrounded by the grid part at the bottom of the vibrating rod 34; The sticky net tube 33 is evenly provided with suction holes 36. The bottom of the sticky net tube 33 is closed, and the top is connected to the suction nozzle 31 through a trachea; A ventilation pipe 37 is provided inside the sealing cover 23, and a temperature and humidity sensor is provided inside the ventilation pipe 37. One end of the ventilation pipe 37 is connected to the sealing cover 23 through a valve, and the other end is connected to the nozzle 3. The ventilation pipe 37 is located inside the heat insulation material 24 and close to the heating component 25.

[0029] Specific working process: When the cleaning brush 32 moves in the area far from the lens, the sliding rod 27 drives the vibrating rod 34 to move. The vibrating rod 34 passes through a plurality of linearly arranged sliders 35. The vibrating rod 34 repeatedly tilts and resets to form vibrations. The vibrating rod 34 drives the cleaning brush 32 to twist left and right through the grid-like bottom, combing the dust trapped in the cleaning brush 32. With the blowing action of the nozzle 3, the dust is removed, maintaining the cleanliness of the cleaning brush 32, thereby improving the cleaning effect and avoiding contamination during lens cleaning; The suction nozzle 31 is connected to the sticky net tube 33 through a trachea, so that the sticky net tube 33 sucks air from the cleaning brush 32 at a short distance through the suction holes 36. While shortening the moving path of the air flow, it improves the dust suction effect on the cleaning brush 32 and further improves the cleanliness of the cleaning brush 32; Before the nozzle 3 sprays air, the air flow passes through the ventilation pipe 37. Since the ventilation pipe 37 is located in the heat-insulating material 24 and close to the heating component 25, the ventilation pipe 37 is heated. The air flow passing through the ventilation pipe 37 is heated by the ventilation pipe 37 and then blown towards the lens at a short distance, which helps with the preheating of a single lens; And, a conventional temperature and humidity sensor is provided in the ventilation pipe 37. The temperature and humidity sensor detects the temperature and humidity of the passing air flow. Through the data of the temperature and humidity sensor, it is convenient for workers to adjust the temperature and humidity parameters of the air flow, which helps to adjust the surface temperature and humidity of the lens itself and improve the coating effect. For example, in a high-humidity environment, the lens surface is prone to adsorb water vapor in the air and form a thin water film; this water film will affect the direct contact between the coating material and the lens surface, hinder the wetting and adhesion of the coating material to the lens, and cause the adhesion of the film layer to decrease; too high temperature may cause the molecular movement on the lens surface to intensify, resulting in an increase in surface roughness and affecting the adhesion and optical properties of the coating; too low temperature may make the lens surface too hard, and the coating material is difficult to spread evenly on its surface, which will also affect the coating quality; In addition, by adjusting the temperature and humidity parameters of the air flow, it is also possible to distinguish and process lenses of different materials at a short distance through the nozzle 3, realizing the adaptive preheating of the lenses. For example, the thermal expansion coefficient of glass lenses is relatively small, and their sensitivity to temperature changes is lower than that of resin lenses; resin lenses may show slight deformation at higher temperatures, while glass lenses are more stable.

[0030] Embodiment 4:

[0031] Based on Embodiment 3, baffles 38 are evenly provided at the bottom of the sliding rod 27, and the baffles 38 are symmetrically distributed on both sides of the lens. The lens is located between adjacent baffles 38; A centering marking device 39 is provided on the side of the baffle 38 close to the center of the sliding rod 27. The centering marking device 39 is used to assist the detection device 29 in detecting the position of the lens; The single brush in the cleaning brush 32 is circular, and the cleaning brush 32 is made of a soft material.

[0032] Specific working process: By setting the baffle 38, when the nozzle 3 works on a single lens, the baffles 38 on both sides of the lens intercept the air flow, guide the air flow to flow towards the lens and the cleaning brush 32, avoid the outflow of the air flow, and prevent the air flow from carrying dust and floating, further ensuring the flow path of the air flow; Position deviation will cause the relative position between the lens and the coating source to change, resulting in uneven deposition of the coating material on the lens surface; Since the machine vision detection instrument in the detection device 29 can also automatically detect the installation accuracy of the lens, by setting the centering marking device 39, which is a component of the auxiliary detection device 29, the centering marking device 39 can be a marking line, which plays a guiding role for the detection device 29 and provides the position requirements for the detection device 29, or it can also be an electronic marking device, which uses an optical method to assist the detection device 29 in detecting the installation position of the lens, realizes the re-detection of the installation position of the lens, and ensures the installation accuracy of the lens; If the number of unqualified lenses on a single substrate plate 13 is too large, the worker will remove the sealing cover 23 and readjust and process the lenses again; By setting the single brush in the cleaning brush 32 to be circular, when the cleaning brush 32 contacts the lens, the end of the cleaning brush 32 is arc-shaped, avoiding the tip of the cleaning brush 32 from contacting the lens, resulting in the cleaning brush 32 repeatedly contacting the lens and causing scratches and damage to the lens, thereby improving the protection of the lens; Moreover, the bottom of the cleaning brush 32 is arc-shaped. When it contacts and adheres to the lens surface, the arc part of the lens bends and gently scratches the lens surface, improving the cleaning effect. Compared with the cleaning brush 32 with vertical bristles, the tip of the cleaning brush 32 with vertical bristles repeatedly scratches and sweeps across the lens surface, increasing the risk of scratching the lens surface; Furthermore, the material of the cleaning brush 32 can be an electrostatic-generating material with a hardness lower than that of the lens, such as chemical fiber fabrics, plush materials, and plastics. During the self-cleaning process of the cleaning brush 32 by swinging through the dial block 35, the cleaning brushes 32 frequently rub against each other to generate and accumulate static electricity. When the cleaning brush 32 approaches and contacts the lens surface, it adsorbs dust through the effect of electrostatic adsorption, improving the cleaning effect; In addition, when the cleaning brush 32 moves to one side of the lens, the cleaning brush 32 can also contact the substrate plate 13 made of metal, eliminating the static electricity in the cleaning brush 32, causing the dust in the cleaning brush 32 to lose the electrostatic adsorption effect, which helps to remove the dust and improves the practicality of the vacuum coating machine.

[0033] Example Five:

[0034] A full-automatic vacuum coating machine control system for an optical lens. The control system includes a hardware system and a software system. The hardware system includes a central processing unit, sensors, actuators, and a human-machine interface. The software system includes a control program, monitoring software, and a diagnostic and alarm program; Hardware system Central processing unit: Usually an PLC is adopted; The PLC has the advantages of high reliability, strong anti-interference ability, simple programming, etc., and is suitable for conventional coating process control; Sensors: Include a vacuum sensor, a temperature sensor, a thickness sensor, etc.; The vacuum sensor is used to monitor the vacuum degree of the coating chamber in real time; The temperature sensors are distributed at parts such as the substrate and the evaporation source to monitor the temperature of each part; The thickness sensor is used to measure the thickness of the coating online; Actuators: Such as the motor 2 of the vacuum pump, the heating power supply of the evaporation source, the driving motor 2 of the substrate holder 11, etc.; These actuators act according to the instructions of the controller to realize the control of parameters such as the vacuum degree, evaporation rate, and substrate movement; Human-machine interface: Generally a touch screen or an industrial computer monitor; Operators input process parameters through the human-machine interface, such as coating thickness, time, vacuum degree requirements, temperature set values, etc., and can view the running state of the equipment, the actual values of each parameter, and alarm information in real time; Software system Control program: Written in a special programming language, such as the ladder diagram language of the PLC; The control program realizes the logical control and parameter adjustment of each hardware device according to the requirements of the coating process, ensuring that the coating process proceeds according to the predetermined steps and parameters; Monitoring software: Used to monitor the running state of the equipment in real time, and display the real-time values of each parameter, the running state icon of the equipment, etc. in a graphical interface; The monitoring software also has a data recording function, and can store key parameters during the coating process, such as vacuum degree, temperature, coating time, thickness, etc., for subsequent query and analysis; Fault diagnosis and alarm program: Can diagnose the running state of the equipment in real time. When abnormal situations are detected, such as abnormal vacuum degree, too high temperature, equipment failure, etc., an alarm signal is immediately sent, and the fault information is displayed on the human-machine interface to prompt the operator to perform corresponding processing; Control flow of the control system Initialization: After the equipment is powered on, the control system first performs self-checks to check whether each hardware device is working properly, such as whether the sensors can collect data normally and whether the actuators can respond normally; Then, the operator inputs the process parameters of this coating through the human-machine interface, including the target vacuum degree, substrate heating temperature, evaporation power of the coating material, coating time, coating thickness, etc.; These parameters are transmitted to the central processing unit for storage and processing; Vacuum system control: The control system starts the vacuum pump group, opens the corresponding vacuum valve, and starts to evacuate the coating room; the vacuum sensor monitors the vacuum degree in the coating room in real time and feeds back the signal to the central processor; the central processor compares the actual vacuum degree with the set target vacuum degree, and adjusts the operating state of the vacuum pump group according to the difference, such as adjusting the speed of the vacuum pump or switching vacuum pumps of different levels, to ensure that the vacuum degree of the coating room gradually reaches and stabilizes at the target value; Heating system control: When the vacuum degree reaches a certain requirement, the control system starts the heating system to heat the substrate; the temperature sensor measures the temperature of the substrate in real time and feeds back the temperature signal to the central processor; the central processor controls the heating speed and final temperature of the substrate by adjusting the power of the heating element according to the set heating temperature value, so that the substrate temperature is stabilized within the set range; during the heating process, if the temperature fluctuates abnormally, the control system will adjust the heating power in time to ensure temperature stability; Coating process control: after the substrate temperature reaches the set value and the vacuum degree is stable, the control system starts the evaporation source; according to the characteristics of the coating material and the process requirements, the central processing unit controls the heating power supply of the evaporation source to make the coating material evaporate at a certain rate; at the same time, the thickness sensor monitors the thickness of the coating in real time and feeds back the thickness information to the central processing unit; the central processing unit compares the real-time thickness data with the set coating thickness, and when the coating thickness reaches the set value, the control system turns off the evaporation source and stops coating; during the coating process, the rotation or movement control of the substrate rack 11 may also be involved to ensure the uniformity of the film layer; the central processing unit controls the drive motor 2 of the substrate rack 11 to rotate or move the substrate at a preset speed and method; Cooling and ending: After the coating is completed, the control system turns off the heating system and starts the cooling system to cool the substrate and equipment. The cooling system removes the heat in the equipment through circulating cooling water, so that the temperature of the substrate and each component of the equipment gradually decreases to room temperature. During the cooling process, the control system continues to monitor parameters such as vacuum degree and temperature to ensure that the equipment is in a safe state. When the equipment cools to room temperature and the vacuum degree remains stable for a period of time, the control system opens the inflation valve and fills dry air or inert gas into the coating chamber to restore the pressure in the coating chamber to atmospheric pressure. Finally, the operator can open the coating chamber and take out the coated substrate, and the coating process ends. Fault handling: During the entire coating process, the fault diagnosis program of the control system continuously monitors the status of various devices and parameters; once an abnormal situation is detected, such as a sudden drop in vacuum degree, temperature exceeding the set range, equipment component failure, etc., the fault diagnosis program immediately triggers the alarm mechanism, displays detailed fault information on the human-machine interface, and emits a sound or light alarm signal; the operator conducts corresponding troubleshooting and handling according to the fault prompt; at the same time, the control system will take corresponding protection measures according to the severity of the fault, such as stopping the equipment operation, cutting off the power supply, etc., to prevent equipment damage or affect the coating quality.

[0035] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic vacuum coating machine for optical lenses, comprising a machine body (1), a vacuum unit, a coating unit, an electrical control unit, a heating unit and a cooling unit; characterized in that, The coating unit includes: A substrate holder (11), which is rotatably connected inside the machine body (1). The top of the substrate holder (11) is connected to the driving device (12) built in the machine body (1). A rectangular area is annularly distributed in the inner circle of the substrate holder (11). A substrate plate (13) is rotatably connected in the rectangular area of the substrate holder (11). Mounting grooves (14) are evenly formed on the substrate plate (13). A screw rod (15) is threadedly connected to the inner wall of the mounting groove (14). One end of the screw rod (15) is rotatably connected to a rotating block (16); A fixing ring (17) is provided between adjacent rotating blocks (16). The fixing ring (17) is composed of a plurality of I-shaped rods hinged to each other. A rubber ring (18) is provided in the inner circle of the fixing ring (17). The lens is installed in the rubber ring (18). A driving shaft (19), which is rotatably connected to the edge of the substrate holder (11). One end of the driving shaft (19) is connected to the substrate plate (13), and the other end is connected to the motor (2) installed on the substrate holder (11); An extrusion rod (21) is hinged to the inner circle of the substrate holder (11) through a torsion spring. The extrusion rod (21) is made of high-temperature resistant plastic, and a pressure sensor (22) is provided on the extrusion rod (21). The pressure sensor (22) contacts the substrate plate (13).

2. The fully automatic vacuum coating machine for an optical lens according to claim 1, wherein: Sealing covers (23) are evenly installed on the substrate holder (11). The sealing covers (23) seal the top and bottom of the substrate plate (13). A heat preservation material (24) is provided on the inner wall of the sealing cover (23). A heating component (25) is provided in the heat preservation material (24). A rubber strip (26) is provided at the outer edge of the sealing cover (23). The rubber strip (26) contacts the substrate holder (11); A sliding rod (27) is slidably connected in the sealing cover (23). The sliding rod (27) slides around the center of the substrate holder (11). A driving component (28) is installed on the inner top of the sealing cover (23). The driving component (28) is connected to the sliding rod (27). The driving component (28) drives the sliding rod (27) to move horizontally and vertically in the sealing cover (23); A detection device (29) is installed on the sealing cover (23). Spray heads (3) are evenly provided on one side of the sliding rod (27). The probe in the detection device (29) is located at the center of the bottom of the sliding rod (27). The spray heads (3) are located on one side of the sliding rod (27). A one-way suction nozzle (31) is provided at the top of the sealing cover (23).

3. The fully automatic vacuum coating machine for an optical lens according to claim 2, characterized in that: A cleaning brush (32) is provided on the side of the sliding rod (27) away from the spray heads (3). A sticky net tube (33) is provided on one side of the cleaning brush (32). The sticky net tube (33) is away from the spray heads (3). The sticky net tube (33) is composed of a plurality of hollow tubes connected.

4. The fully automatic vacuum coating machine for an optical lens according to claim 3, characterized in that: A vibrating rod (34) is provided between the sticky net tube (33) and the cleaning brush (32) on the sliding rod (27). The vibrating rod (34) is hinged to the sliding rod (27) through a torsion spring. The bottom of the vibrating rod (34) is in a grid shape and surrounds the cleaning brush (32). Dial blocks (35) are evenly provided on the inner top of the sealing cover (23). The top of the vibrating rod (34) contacts the dial blocks (35).

5. The fully automatic vacuum coating machine for an optical lens according to claim 4, wherein: The suction holes (36) are evenly formed in the sticky net tube (33). The bottom of the sticky net tube (33) is closed, and the top is connected to the suction nozzle (31) through an air pipe.

6. The fully automatic vacuum coating machine for an optical lens according to claim 4, characterized in that: A ventilation pipe (37) is arranged in the sealing cover (23), and a temperature and humidity sensor is arranged in the ventilation pipe (37). One end of the ventilation pipe (37) is connected to the sealing cover (23) through a valve, and the other end is connected to the spray head (3). The ventilation pipe (37) is located in the heat insulation material (24) and close to the heating component (25).

7. The fully automatic vacuum coating machine for an optical lens according to claim 2, characterized in that: The bottom of the sliding rod (27) is evenly provided with baffles (38), and the baffles (38) are symmetrically distributed on both sides of the lens. The lens is located between adjacent baffles (38).

8. The fully automatic vacuum coating machine for an optical lens according to claim 7, characterized in that: A centering marking device (39) is arranged on one side of the baffle (38) close to the center of the sliding rod (27). The centering marking device (39) is used to assist the detection device (29) in detecting the position of the lens.

9. The fully automatic vacuum coating machine for an optical lens according to claim 3, characterized in that: The single brush in the cleaning brush (32) is in a circular shape, and the cleaning brush (32) is made of a soft material.

10. A control system for a full-automatic vacuum coating machine for optical lenses, the control system being applicable to the full-automatic vacuum coating machine according to any one of claims 1-9, characterized in that: The control system includes a hardware system and a software system. The hardware system includes a central processor, sensors, actuators, and a human-machine interface. The software system includes a control program, monitoring software, and a diagnostic alarm program.

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