Automatic gluing device for lens

Abstract

The utility model provides an automatic lens gluing device, which relates to the technical field of precise optical element manufacture, and comprises a clamping module, a glue injection pipe, a granite platform, a driving unit, a support rod and a clamping mechanism, the support rod and the clamping mechanism drive to adjust the glue injection position of the glue injection pipe, and glue is coated on a lens group to be glued. The driving unit drives the rotating platform to rotate so as to drive the clamping module and the to-be-glued lens group to rotate, so that automatic gluing around the lens group is realized, the lens group is uniformly glued, and the uniformity of the gluing thickness is ensured; the problems that in an existing gluing mode, due to glue layer thickness fluctuation, asymmetric stress is generated after curing, dust pollution is easily caused by manual gluing, the cleanliness of a light-transmitting area is affected, and the consistency of glue line tracks is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision optical element manufacturing, and particularly relates to an automatic lens gluing device. Background Art

[0002] During the assembly of an optical lens, the bonding quality between the lens and the lens frame directly affects the optical performance of the imaging system. The following problems exist in traditional manual gluing. First, the fluctuation of the glue layer thickness causes asymmetric stress after curing, resulting in the loss of the lens surface accuracy. Second, manual gluing operation is prone to introducing dust pollution, affecting the cleanliness of the light transmission area. Third, the consistency of the glue line trajectory is poor, affecting the coaxiality of lens assembly. In addition, although the existing automatic dispensing equipment can ensure a constant glue output, it lacks a dynamic coordination mechanism with the rotational movement of the workpiece and is difficult to achieve uniform coating of complex curved surfaces. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art, so as to provide an automatic lens gluing device.

[0004] An automatic lens gluing device includes: a clamping module, a glue injection tube, a granite platform and a driving unit. The bottom of the clamping module is connected with a rotating platform, the rotating platform is connected with the power output end of the driving unit, the driving unit is arranged on the granite platform, a support rod is also arranged on the granite platform, a clamping mechanism is arranged on the support rod, the glue injection tube is arranged on the clamping mechanism, and the lens group to be glued is arranged on the clamping module.

[0005] Further, the clamping module is a three-jaw self-centering chuck, which includes a chuck and clamping jaws. The clamping jaws are arranged on the chuck, and the lens group to be glued is arranged between the chuck and the clamping jaws.

[0006] Further, the part of the clamping jaw in contact with the lens group to be glued is provided with a polyurethane anti-slip pad.

[0007] Further, the device also includes a universal ball head bearing. The fixed end of the universal ball head bearing is installed on the support rod, and the ball head end of the universal ball head bearing is connected with the clamping mechanism.

[0008] Further, the driving unit is a stepping motor, and the power output end of the stepping motor is connected with the rotating platform.

[0009] Further, the flatness of the upper surface of the rotating platform is less than or equal to 2μm.

[0010] Further, the rotation speed range of the stepping motor is 0.1rpm - 60rpm.

[0011] Further, the volume of the glue injection tube is 50mL.

[0012] Furthermore, the glue output flow rate of the glue injection tube is 0.1 - 5 mL / min.

[0013] Furthermore, the chuck is connected to the rotating platform by screws.

[0014] The technical solution of the present utility model has the following advantages:

[0015] In the technical solution provided by the present utility model, the glue injection position of the glue injection tube is driven and adjusted by the support rod and the clamping mechanism to apply glue to the lens group to be coated. The driving unit drives the rotating platform to rotate, thereby driving the clamping module and the lens group to be coated to rotate, realizing automatic circumferential coating of the lens group, uniformly coating the lens group, and ensuring the uniformity of the coating thickness. Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a cross-sectional view of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the clamping jaw and the clamping mechanism of the present utility model;

[0020] Figure 4 It is a surface profile detection result diagram obtained by applying glue using the glue application device in the prior art;

[0021] Figure 5 It is a surface profile detection result diagram obtained by applying glue using the present utility model.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1 - Lens group to be coated; 2 - Clamping module; 3 - Rotating platform; 4 - Stepper motor; 5 - Glue injection tube; 6 - Support rod; 7 - Granite platform; 8 - Glue injection groove; 9 - Clamping jaw; 10 - Clamping mechanism. Detailed Embodiments

[0024] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] As Figures 1 to 3 shown, a lens automatic gluing device includes: a clamping module 2, a glue injection tube 5, a granite platform 7 and a driving unit. The bottom of the clamping module 2 is connected with a rotating platform 3. The rotating platform 3 is connected with the power output end of the driving unit. The driving unit is arranged on the granite platform 7. A support rod 6 is also arranged on the granite platform 7. A clamping mechanism 10 is arranged on the support rod 6. The glue injection tube 5 is arranged on the clamping mechanism 10. The lens group to be glued 1 is arranged on the clamping module 2.

[0029] The above-mentioned lens automatic gluing device is applicable to the gluing and assembly operation of high-precision lens groups. The glue injection position of the glue injection tube 5 is driven and adjusted by the support rod 6 and the clamping mechanism 10 to glue the lens group to be glued 1. The driving unit drives the rotating platform 3 to rotate, and then drives the clamping module 2 and the lens group to be glued 1 to rotate, realizing automatic circumferential gluing of the lens group, uniformly gluing the lens group, and ensuring the uniformity of the glue coating thickness.

[0030] AsFigures 1 to 3 As shown, in this embodiment, the clamping module 2 is a three-jaw self-centering chuck. The three-jaw self-centering chuck includes a chuck and clamping jaws 9. The clamping jaws 9 are arranged on the chuck, and the lens group 1 to be coated with glue is arranged in the chuck and the clamping jaws 9. There are three clamping jaws 9 in total. The part of the clamping jaws 9 in contact with the lens group 1 to be coated with glue is provided with a polyurethane anti-slip pad. The polyurethane anti-slip pads on each clamping jaw 9 have the same thickness. When the clamping force of the three-jaw self-centering chuck reaches 8 N·m, the polyurethane anti-slip pad will automatically trigger elastic deformation to avoid generating assembly stress on the lens group 1 to be coated with glue.

[0031] As Figures 1 to 3 shown, in this embodiment, the device further includes a universal ball head bearing. The fixed end of the universal ball head bearing is installed on the support rod 6, and the ball head end of the universal ball head bearing is connected to the clamping mechanism 10. Through the setting of the universal ball head bearing, the clamping mechanism 10 can perform glue coating work at multiple angles, increasing the flexibility of the device. The support rod 6 has multiple degrees of freedom and can be locked and fixed at multiple angles and positions. During the use of the glue coating device, a digital display micrometer is also used to measure the radial runout. The digital display micrometer is also clamped by the support rod 6 and the clamping mechanism 10. The support rod 6 is a prior art, so its structural composition and working principle will not be elaborated here.

[0032] As Figures 1 to 3 shown, in this embodiment, the driving unit is a stepping motor 4. The power output end of the stepping motor 4 is connected to the rotating platform 3. The rotation speed range of the stepping motor 4 is 0.1 rpm to 60 rpm. In addition, the DSP controller can be used to control the stepping motor 4 to achieve a speed resolution of 0.01 rpm level, improving the precision of glue injection. By using the stepping motor 4 as the power unit to drive the rotation of the rotating platform 3, the automatic glue injection work for the lens group is realized, avoiding the problems of easy introduction of dust pollution, affecting the cleanliness of the light transmission area, and poor consistency of the glue line trajectory caused by manual glue injection.

[0033] As Figures 1 to 3 shown, in this embodiment, the flatness of the upper surface of the rotating platform 3 is less than or equal to 2 μm. The upper surface of the rotating platform 3 has also been subjected to hard anodizing treatment, increasing its corrosion resistance and wear resistance of the working surface, ensuring the flatness of the working surface, and controlling the flatness of the upper surface of the rotating platform 3 can effectively improve the glue injection precision.

[0034] As Figures 1 to 3 shown, in this embodiment, the volume of the glue injection tube 5 is 50 mL. However, the specific volume can be adjusted and replaced according to the actual glue injection requirements. The glue injection tube 5 uses pneumatic drive to discharge glue. The inner diameter of the glue outlet nozzle is adjusted by replacing the glue outlet needle at the glue outlet nozzle. The glue discharge flow rate of the glue injection tube 5 is 0.1 - 5 mL / min. The control response time of the glue injection tube 5 < 50 ms. The glue injection tube 5 has a rapid response and can inject glue accurately.

[0035] As Figures 1 to 3 shown, in this embodiment, the chuck is connected to the rotary platform 3 by screws; the connection by screws can ensure that the chuck and the rotary platform 3 rotate in coordination during the glue injection process, ensuring the progress of the glue injection work.

[0036] As Figures 1 to 3 shown, in this embodiment, first, the rotary platform 3 and the support rod 6 are installed on the granite platform 7. The flatness of the granite platform 7 is grade 0. The digital display micrometer is first installed on the clamping mechanism 10. The axial runout of the rotary platform 3 is detected by using the digital display micrometer (ensuring the eccentricity < 5 μm). Then, the glue injection tube 5 is installed on the clamping mechanism 10 and the glue injection tube 5 is preheated to 35 ± 1 °C. The purpose is to reduce the viscosity of the glue. After that, the chuck is installed into the rotary platform 3 and the screws are lightly locked. The probe of the digital display micrometer contacts the outer circle of the chuck. Then, the rotary platform 3 is rotated, and the radial runout data is collected. By adjusting the chuck positioning screws and the rotary platform 3, the eccentricity is ≤ 3 μm, and the chuck and the rotary platform 3 are locked (the torque value is 4.5 N·m at this time); then, the glue-coated lens group 1 composed of a lens and a lens frame is installed into the three-jaw self-centering chuck, and a clamping torque of 2 N·m is applied at the same time. The glue injection groove 8 is located between the lens and the lens frame. The support rod 6 is adjusted so that the distance between the glue injection nozzle and the glue injection groove 8 is 0.3 mm to 1 mm. After adjustment, the process parameters are set. According to the size of the lens and the width and depth of the glue injection groove 8, the rotation speed of the rotary platform 3 and the glue injection flow rate are set. The control program is started, and the device automatically performs the glue injection work, that is: the rotary platform 3 accelerates to the set rotation speed, the glue injection tube 5 starts to discharge glue after a delay of 0.5 s, and the glue injection tube 5 stops injecting glue after the rotary platform 3 rotates one week, and the glue injection is completed; the specific method of the axis calibration process is: the digital display micrometer (resolution 0.001 mm) is fixed on the support rod 6, and the radial runout is measured three or four times at the equally divided points on the circumference of the chuck. The eccentricity compensation amount is calculated by the least squares method fitting, and the axis calibration is ensured by adjusting the position of the rotary platform 3 and the chuck;

[0037] This device has been applied to the mass production of micro lenses and the nano-level gluing of microscopes. After the above glue injection process, the standard deviation σ of the glue layer thickness of this device is 0.8 μm, while the standard deviation σ of the glue layer thickness of the traditional method is 5.2 μm. According to the detection results of the interferometer, as Figure 4 and Figure 5 shown, comparing the glue injection work of this device with the traditional method, the PV value of the surface shape accuracy of the traditional method is 53.133 nm, while the PV value of the surface shape accuracy after the glue injection work of this device is 38.345 nm. The PV value of the surface shape accuracy is improved by 30%. The operation time is shortened to one-third of the manual operation. The single-piece glue injection working hours are less than 5 min, and the qualified product rate is increased from 68% to 98.5%.

[0038] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of this utility model creation.

Claims

1. A lens automatic glue coating device, comprising: A clamping module (2), a glue injection tube (5), a granite platform (7) and a driving unit, characterized in that the bottom of the clamping module (2) is connected to a rotating platform (3), the rotating platform (3) is connected to the power output end of the driving unit, the driving unit is arranged on the granite platform (7), a support rod (6) is also arranged on the granite platform (7), a clamping mechanism (10) is arranged on the support rod (6), the glue injection tube (5) is arranged on the clamping mechanism (10), and the mirror group (1) to be coated with glue is arranged on the clamping module (2).

2. The automatic lens gluing device according to claim 1, characterized in that: The clamping module (2) is a three-jaw self-centering chuck, which comprises a chuck and a clamping jaw (9), wherein the clamping jaw (9) is arranged on the chuck, and the lens group (1) to be coated with glue is arranged in the chuck and the clamping jaw (9).

3. The automatic lens glue coating device according to claim 2, characterized in that: The portion of the clamping claw (9) that contacts the lens assembly (1) to be coated with glue is provided with a polyurethane anti-slip pad.

4. The automatic lens gluing device according to claim 1, characterized in that: The device also includes a universal ball bearing, the fixed end of which is mounted on the support rod (6), and the ball end of which is connected to the clamping mechanism (10).

5. The automatic lens gluing device according to claim 1, characterized in that: The driving unit is a stepping motor (4), and a power output end of the stepping motor (4) is connected to the rotating platform (3).

6. The automatic lens gluing device according to claim 1, characterized in that: The flatness of the upper surface of the rotating platform (3) is less than or equal to 2 μm.

7. The automatic lens glue coating device according to claim 5, characterized in that: The rotation speed range of the stepping motor (4) is 0.1 rpm to 60 rpm.

8. The automatic lens gluing device according to claim 1, characterized in that: The volume of the glue injection tube (5) is 50 mL.

9. The automatic lens gluing device according to claim 1, characterized in that: The glue discharge flow rate of the glue injection tube (5) is 0.1-5 mL / min.

10. The automatic lens gluing device according to claim 2, characterized in that: The chuck is connected to the rotating platform (3) via screws.

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