Biomimetic lens precision cutting and positioning fixture structure

Abstract

This utility model discloses a precision cutting and positioning fixture structure for bionic eye lenses, belonging to the technical field of bionic eye manufacturing equipment. It aims to solve the problems of unstable clamping of spherical lenses, low positioning accuracy, and poor movement adjustment efficiency in existing fixtures. It includes a support frame, an X-axis linear drive assembly, a Z-axis linear drive assembly, and a positioning fixture. The support frame includes a support column, an X-axis mounting beam, and a receiving platform. The X-axis and Z-axis linear drive assemblies respectively achieve electrical drive movement along the X and Z axes through a drive component and a slider. The positioning fixture's multi-jaw clamping mechanism has an arc-shaped clamping surface adapted to the spherical lens. This structure can stably clamp the lens to prevent deformation, achieve precise movement adjustment, improve cutting accuracy and efficiency, and meet the high-precision cutting requirements of bionic eye lenses.

Description

Technical Field

[0001] This utility model provides a positioning clamp structure, belonging to the technical field, and particularly relates to a biomimetic eye lens precision cutting and positioning clamp structure. Background Technology

[0002] Precision cutting and positioning fixtures for bionic eye lenses are key auxiliary equipment in the manufacturing process of bionic eyes. They are mainly used to achieve stable clamping and precise positioning of the lens (especially lenses with spherical features) during the cutting and processing of bionic eye lenses. This ensures that the cutting tool can process the lens according to the preset trajectory and size, directly affecting the processing accuracy, finished product quality and production efficiency of bionic eye lenses. It is an important intermediate link connecting lens forming and final assembly.

[0003] In existing technologies, positioning fixtures for bionic eye lens shearing mostly employ simple manual clamping structures, generally including a fixed base, manually adjustable clamping components, and a unidirectional sliding guide rail. The clamping components are often planar or simple curved jaws, which are difficult to adapt to the curved surface features of a spherical lens, easily leading to unstable clamping or deformation of the lens surface due to pressure. Sliding adjustment relies heavily on manual knob control, failing to achieve precise electrical drive in the X and Z axes, resulting in low positioning accuracy and low adjustment efficiency. Simultaneously, the support structure is often a simple frame with insufficient overall stability, easily affected by vibration during shearing operations, making it difficult to meet the high-precision shearing requirements of bionic eye lenses. Utility Model Content

[0004] This invention aims to solve the problems of unstable clamping, insufficient positioning accuracy, and low movement adjustment efficiency in the existing technology of bionic eye lens cutting, and provides a precision cutting and positioning fixture structure that can stably clamp a spherical bionic eye lens and realize precise electrical drive movement along the X and Z axes.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bionic eye lens precision cutting and positioning fixture structure, including a support frame, an X-axis linear drive component arranged along the X-axis, a Z-axis linear drive component connected to the X-axis linear drive component and arranged along the Z-axis, and a positioning fixture connected to the lower end of the Z-axis linear drive component; the support frame includes a vertically arranged support column, an X-axis mounting beam fixed to the top of the support column, and a receiving platform fixed to the lower part of the support column for receiving and cutting the lens; the X-axis linear drive component is mounted on the X-axis mounting beam, and the Z-axis linear drive component is slidably connected to the X-axis linear drive component through an X-axis slider to achieve linear movement along the X-axis; the positioning fixture is used to stably clamp the bionic eye lens, and the positioning fixture is slidably connected to the Z-axis linear drive component through a Z-axis slider to achieve linear movement along the Z-axis, adapting to the positioning and clamping requirements of the lens in the cutting operation.

[0006] As a further optimized technical solution, the X-axis mounting beam is long and extends horizontally. The X-axis mounting beam is provided with an X-axis guide rail and an X-axis drive component. The X-axis slider slides in cooperation with the X-axis guide rail and is connected to the power output end of the X-axis drive component. The X-axis drive component is a linear motor or a lead screw and nut assembly. The X-axis slider reciprocates along the X-axis guide rail under the drive of the X-axis drive component.

[0007] As a further optimized technical solution, the Z-axis linear drive assembly includes a vertically arranged Z-axis mounting plate, a Z-axis guide rail and a Z-axis drive component on the Z-axis mounting plate, a Z-axis slider that slides with the Z-axis guide rail and is connected to the power output end of the Z-axis drive component; the Z-axis drive component is a linear motor or a lead screw and nut assembly, and the Z-axis slider reciprocates along the Z-axis guide rail under the drive of the Z-axis drive component.

[0008] As a further optimized technical solution, the positioning fixture includes a fixture mounting base and a multi-claw clamping mechanism disposed at the lower end of the fixture mounting base. The multi-claw clamping mechanism has multiple clamping claws that can adapt to the shape of a bionic eyeball. The fixture mounting base is fixedly connected to the Z-axis slider. The multi-claw clamping mechanism includes a driving cylinder and multiple clamping claws that are driven by the driving cylinder to open or close. The inner side of each clamping claw is provided with an arc-shaped clamping surface that adapts to the shape of the bionic eye lens.

[0009] As a further optimized technical solution, the receiving platform is a horizontally arranged long strip-shaped structure. The receiving platform is fixedly connected to the support column through support legs, and the receiving platform is located directly below the positioning fixture.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art:

[0011] A. This utility model, by setting up a multi-claw clamping mechanism, and the inner side of the clamping claw is provided with an arc-shaped clamping surface that is adapted to the shape of the bionic eye lens, can perfectly adapt to the curved surface characteristics of the spherical lens, achieve stable clamping, effectively avoid lens deformation under pressure, and ensure the structural integrity of the lens before shearing.

[0012] B. By utilizing X-axis linear drive components and Z-axis linear drive components, precise electrical drive movement in the X and Z axes is achieved through X-axis drive components and Z-axis drive components (linear motors or lead screw and nut assemblies), respectively, replacing traditional manual adjustment, greatly improving positioning accuracy and adjustment efficiency, and meeting the position adjustment requirements of high-precision shearing of bionic eye lens.

[0013] C. The support frame adopts a combination structure of vertical support columns, X-axis mounting beams and receiving platform, which has strong overall stability and can effectively reduce vibration during shearing operations, further ensuring positioning accuracy; at the same time, the receiving platform is located directly below the positioning fixture, which facilitates the receiving and shearing of the lens.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is an elevation view of the bionic eye lens precision cutting and positioning fixture structure of this utility model;

[0016] Figure 2 This is an exploded view of the structure of the bionic eye lens precision cutting and positioning fixture of this utility model;

[0017] Figure 3 This is a bottom view of the support frame of the bionic eye lens precision cutting and positioning clamp structure of this utility model;

[0018] Figure 4 This is a bottom view of the bionic eye lens precision cutting and positioning fixture structure of this utility model.

[0019] As shown in the figure:

[0020] 1. Support frame; 2. X-axis linear drive assembly; 3. Z-axis linear drive assembly; 4. Support column; 5. X-axis mounting beam; 6. Receiving platform; 7. X-axis slider; 8. Positioning fixture; 9. Z-axis slider. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figures 1 to 4 As shown, this embodiment provides a bionic eye lens precision cutting and positioning fixture structure, including a support frame 1, an X-axis linear drive assembly 2 arranged along the X-axis, a Z-axis linear drive assembly 3 connected to the X-axis linear drive assembly 2 and arranged along the Z-axis, and a positioning fixture 8 connected to the lower end of the Z-axis linear drive assembly 3.

[0025] The support frame 1 serves as the installation foundation for the overall structure, including vertically arranged support columns 4 (which can be metal square columns to ensure support strength), an X-axis mounting beam 5 fixed to the top of the support column 4 (which is a long strip of metal beam extending horizontally to provide a mounting carrier for the X-axis linear drive assembly 2), and a receiving platform 6 fixed to the lower part of the support column 4 for receiving and shearing the lens. The receiving platform 6 is a horizontally arranged long strip-shaped structure, which is fixedly connected to the support column 4 through support legs, and the receiving platform 6 is located directly below the positioning clamp 8 to facilitate receiving and cooperating with the positioning clamp 8 to perform operations on the lens.

[0026] The X-axis linear drive assembly 2 is mounted on the X-axis mounting beam 5. The X-axis mounting beam 5 is provided with an X-axis guide rail (which can be a linear guide rail to ensure sliding accuracy) and an X-axis drive component. The X-axis slider 7 slides with the X-axis guide rail and is connected to the power output end of the X-axis drive component. In this embodiment, the X-axis drive component is preferably a lead screw and nut assembly (a linear motor can also be used). The X-axis slider 7 moves back and forth along the X-axis guide rail under the drive of the lead screw and nut assembly, thereby driving the Z-axis linear drive assembly 3 to achieve linear movement along the X-axis and complete the position adjustment in the X-axis direction.

[0027] The Z-axis linear drive assembly 3 includes a vertically arranged Z-axis mounting plate (a vertical metal plate, fixedly connected to the X-axis slider 7). The Z-axis mounting plate is provided with a Z-axis guide rail (linear guide rail) and a Z-axis drive component. The Z-axis slider 9 slides with the Z-axis guide rail and is connected to the power output end of the Z-axis drive component. The Z-axis drive component can also be a linear motor or a lead screw and nut assembly. In this embodiment, a lead screw and nut assembly is preferred. The Z-axis slider 9 moves back and forth along the Z-axis guide rail under the drive of the Z-axis drive component, thereby driving the positioning fixture 8 to achieve linear movement along the Z-axis and complete the position adjustment in the Z-axis direction.

[0028] The positioning clamp 8 is used to stably clamp the bionic eye lens, including a clamp mounting base (fixedly connected to the Z-axis slider 9 to achieve connection with the Z-axis linear drive assembly 3) and a multi-claw clamping mechanism set at the lower end of the clamp mounting base; the multi-claw clamping mechanism has multiple clamping claws that can adapt to the shape of the bionic eye spherical shape, and the multi-claw clamping mechanism includes a drive cylinder and multiple clamping claws that are driven by the drive cylinder to open or close. The inner side of each clamping claw is provided with an arc-shaped clamping surface that adapts to the shape of the bionic eye lens. The opening and closing of the clamping claws is controlled by the drive cylinder, and the arc-shaped clamping surface fits the curved surface of the spherical lens to achieve stable and damage-free clamping.

[0029] The working process of this embodiment is as follows: First, the bionic eye lens to be cut is placed on the receiving platform 6. The X-axis linear drive assembly 2 drives the Z-axis linear drive assembly 3 to move along the X-axis, moving the positioning clamp 8 to the upper region of the lens. Then, the Z-axis linear drive assembly 3 drives the positioning clamp 8 to move downward along the Z-axis, bringing the multi-jaw clamping mechanism closer to the lens. Next, the drive cylinder actuates to control the clamping jaws to close, using the arc-shaped clamping surface to stably clamp the lens. At this time, according to the cutting operation requirements, the position of the lens in the X-axis and Z-axis directions can be precisely adjusted by the X-axis linear drive assembly 2 and the Z-axis linear drive assembly 3, and the cutting tool is used to complete the precise cutting operation of the lens. After the cutting is completed, the drive cylinder controls the clamping jaws to open, the Z-axis linear drive assembly 3 drives the positioning clamp 8 to move upward, the X-axis linear drive assembly 2 resets, and the processed lens can be taken out.

[0030] Based on the above implementation scheme, during operation, the external three-phase AC power supply provides power to the PLC controller, touch screen human-machine interface, and servo driver via an air switch and a power filter. The PLC controller connects to the touch screen human-machine interface via an RS485 communication line to achieve data interaction. The digital output terminal of the PLC controller is connected to the enable terminal and control signal input terminal of the servo driver via wires. The power output terminal of the servo driver is connected to the motor terminals of the X-axis and Z-axis drive components via power cables. The signal output terminal of the photoelectric encoder is connected to the high-speed counter input terminal of the PLC controller via shielded twisted pair cable. The signal line of the photoelectric sensor is connected to the digital input terminal of the PLC controller. The electromagnetic reversing valve coil of the drive cylinder is connected to the digital output terminal of the PLC controller via wires. The grounding terminals of each electrical component are connected to the workshop grounding electrode through grounding wires to form a reliable ground.

[0031] In practical use, this device requires the use of high-precision shearing tools (such as pneumatic scissors or laser cutters) to cut the bionic eye lens. It also needs a control system consisting of a PLC controller, a touchscreen human-machine interface, and servo drivers to set and precisely control the motion parameters of the X-axis and Z-axis linear drive components. Simultaneously, position sensors such as photoelectric encoders are needed to provide real-time feedback on the displacement information of the X-axis and Z-axis sliders to ensure positioning accuracy. The support columns, X-axis mounting beam, and receiving platform of the support frame can be made of 6061 aluminum alloy, which combines lightweight design with sufficient structural strength. The X-axis and Z-axis guide rails can be made of 45# steel after quenching to improve wear resistance. The gripping claws can be made of polytetrafluoroethylene (PTFE), which has a smooth surface and a certain degree of elasticity to avoid damaging the lens. The drive cylinder can be made of 304 stainless steel, which is corrosion-resistant and has a long service life. The connections between components must be fixed using existing hexagonal bolts, and wires and air pipes are provided to transmit electrical signals and supply air to the pneumatic components, respectively.

[0032] Specifically, the support columns can be fixed to the four corners of the workshop workbench with expansion bolts to ensure overall stability; the X-axis mounting beam is welded to the top of the support columns and then reinforced with bolts to enhance structural rigidity; the support legs of the receiving platform are connected to the support columns with flanges and bolts for easy disassembly and height adjustment.

[0033] The PLC controller needs to be pre-programmed with control programs. The shearing trajectory parameters are input into the touch screen human-machine interface. Operators can start and stop the device, adjust the moving speed and clamping force through the interface. The servo driver is electrically connected to the motors of the X-axis and Z-axis drive components to achieve precise control of power output. The photoelectric encoder is installed at the end of the X-axis and Z-axis guide rails. It is linked with the slider through gear meshing to collect displacement data in real time and transmit it to the PLC to form a closed-loop control.

[0034] Before use, check that the hex bolts are secure and that the wires and air pipes are reliably connected. After starting the device, place the lens to be cut at the preset position on the receiving platform. The photoelectric sensor detects the lens and sends a signal to the PLC. The PLC controls the Z-axis linear drive assembly to move the positioning fixture downwards, and the drive cylinder actuates to close the clamping jaws and hold the lens. After the operator confirms the position parameters via the touch screen, they start the laser cutter or pneumatic shears. The PLC controls the X-axis and Z-axis drive assemblies according to the preset program to move the lens along the trajectory and complete the cutting.

[0035] After shearing is completed, the shearing tool resets, the drive cylinder releases the clamping jaws, the Z-axis assembly moves upward, the X-axis assembly resets, and the operator removes the lens. After use, the power and air supply must be turned off, and the guide rail and slider should be cleaned and coated with lithium-based grease to extend their service life.

[0036] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A biomimetic eye lens precision cutting and positioning clamp (8) structure, characterized in that, The device includes a support frame (1), an X-axis linear drive assembly (2) arranged along the X-axis, a Z-axis linear drive assembly (3) connected to the X-axis linear drive assembly (2) and arranged along the Z-axis, and a positioning clamp (8) connected to the lower end of the Z-axis linear drive assembly (3); the support frame (1) includes a vertically arranged support column (4), an X-axis mounting beam (5) fixed to the top of the support column (4), and a receiving platform (6) fixed to the lower part of the support column (4) for receiving and shearing the lens; The X-axis linear drive assembly (2) is mounted on the X-axis mounting beam (5), and the Z-axis linear drive assembly (3) is slidably connected to the X-axis linear drive assembly (2) via the X-axis slider (7) to achieve linear movement along the X-axis; the positioning clamp (8) is used to stably clamp the bionic eye lens, and the positioning clamp (8) is slidably connected to the Z-axis linear drive assembly (3) via the Z-axis slider (9) to achieve linear movement along the Z-axis, adapting to the positioning and clamping requirements of the lens in the cutting operation.

2. The bionic eye lens precision cutting and positioning fixture (8) structure according to claim 1, characterized in that, The X-axis mounting beam (5) is long and extends horizontally. The X-axis mounting beam (5) is provided with an X-axis guide rail and an X-axis drive component. The X-axis slider (7) slides with the X-axis guide rail and is connected to the power output end of the X-axis drive component.

3. The biomimetic eye lens precision cutting and positioning fixture (8) structure according to claim 2, characterized in that, The X-axis drive is a linear motor or a lead screw and nut assembly, and the X-axis slider (7) moves back and forth along the X-axis guide rail by the drive of the X-axis drive.

4. The biomimetic eye lens precision cutting and positioning fixture (8) structure according to claim 1, characterized in that, The Z-axis linear drive assembly (3) includes a vertically arranged Z-axis mounting plate, a Z-axis guide rail and a Z-axis drive component on the Z-axis mounting plate, and a Z-axis slider (9) that slides with the Z-axis guide rail and is connected to the power output end of the Z-axis drive component.

5. The biomimetic eye lens precision cutting and positioning fixture (8) structure according to claim 4, characterized in that, The Z-axis drive is a linear motor or a lead screw and nut assembly, and the Z-axis slider (9) moves back and forth along the Z-axis guide rail under the drive of the Z-axis drive.

6. The bionic eye lens precision cutting and positioning fixture (8) structure according to claim 1, characterized in that, The positioning fixture (8) includes a fixture mounting base and a multi-jaw clamping mechanism disposed at the lower end of the fixture mounting base. The multi-jaw clamping mechanism has multiple clamping jaws that can adapt to the shape of a bionic eyeball. The fixture mounting base is fixedly connected to the Z-axis slider (9).

7. The bionic eye lens precision cutting and positioning fixture (8) structure according to claim 6, characterized in that, The multi-claw clamping mechanism includes a driving cylinder and multiple clamping claws that are driven by the driving cylinder to open or close. The inner side of each clamping claw is provided with an arc-shaped clamping surface adapted to the shape of the bionic eye lens.

8. The biomimetic eye lens precision cutting and positioning fixture (8) structure according to claim 1, characterized in that, The receiving platform (6) is a horizontally arranged long strip-shaped structure. The receiving platform (6) is fixedly connected to the support column (4) through support legs, and the receiving platform (6) is located directly below the positioning fixture (8).

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