Edge slotting clamp for controlling center thickness of lens
By designing an edge grooved fixture that controls the center thickness of the lens, the problems of damaged and uneven grinding of concave lenses in traditional processing methods are solved, and stable fixation and efficient processing of small-sized concave lenses are achieved, and manufacturing accuracy and efficiency are improved.
Patent Information
- Application Number
- CN202420827439.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-22
AI Technical Summary
Traditional polishing processing methods are difficult to stabilize and protect concave lenses with small radius of curvature, central thickness and thin edges, resulting in broken edges of lenses and uneven grinding of medium and thick grinding, affecting manufacturing accuracy and efficiency.
An edge groove fixture is designed to control the center thickness of the lens, including a cylindrical bottom shell and a boss. The outer edge of the boss forms an annular groove with the inner wall of the circular opening groove to accommodate the edge of the concave lens, and a buffer layer is provided at the outer end to prevent damage. , the limit jack and the positioning pin cooperate to ensure accurate positioning.
The stable fixation and efficient processing of small-sized concave lenses are achieved, avoiding damage and shaking of the edges of the lenses, and improving processing accuracy and efficiency.
Smart Images
Figure CN222134617U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lens processing, in particular to an edge grooving fixture for controlling the central thickness of a lens. Background Art
[0002] With the rapid advancement of modern optical technology, the demand for manufacturing precision and efficiency of optical components is also increasing. Among them, concave lenses occupy an indispensable position in optical systems due to their special geometric shape and optical properties. Concave lenses play a vital role in key functions such as focusing, reflection and imaging. Therefore, precise control of their shape and size is particularly critical, which directly affects the performance of the entire optical system.
[0003] However, in the actual production process, the manufacture of concave lenses faces many challenges. For lenses with a small radius of curvature R, especially those with a concave surface close to a hemisphere and thin center thickness and edges, this greatly increases the difficulty of processing. In the traditional polishing method, it is usually necessary to clamp the concave surface with a small radius of curvature on a workbench and then polish the other side. Although this processing method solves the fixation problem in the processing process to a certain extent, it also brings a series of new problems.
[0004] Since the original clamping and fixing device cannot limit and protect the edge of the lens, for lenses with a small radius of curvature, a center thickness and thin edges, the concave side with a small radius of curvature is clamped during processing. As a result, the edge of the lens is damaged due to the action of force during processing, and the middle and thick grinding is uneven due to the shaking of the lens, resulting in lens deformation. This not only affects the processing efficiency, but also causes damage to the lens and increases production costs.
[0005] Therefore, in order to solve the above problems and improve the manufacturing accuracy and efficiency of concave lenses, we urgently need to develop a new processing technology and tool that can achieve stable fixation and efficient processing of small-sized and small-radius-of-curvature concave lenses. Summary of the invention
[0006] In order to solve the above problems, the utility model discloses an edge grooving fixture for controlling the center thickness of a lens.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions: an edge grooving fixture for controlling the center thickness of a lens, comprising a cylindrical bottom shell, one side of the cylindrical bottom shell is provided with a circular opening groove for matching with a concave lens, and the center of the circular opening groove is formed with a boss for aligning with the concave portion of the concave lens;
[0008] An annular groove for accommodating the edge of the concave lens is formed between the outer edge of the boss and the inner wall of the circular opening groove, and the width of the annular groove is consistent with the edge thickness of the concave side of the concave lens.
[0009] Furthermore, a buffer layer is provided at the outer end of the boss, and the buffer layer covers the entire outer end surface of the boss.
[0010] The outer periphery of the boss is provided with an arc chamfer to make its edge more rounded and smooth, so as to avoid damage to the concave lens when it is aligned with the concave surface side of the concave lens.
[0011] In the above solution, the bottom of the cylindrical bottom shell has at least one limiting hole, and the limiting hole is used to align with the positioning pin on the workbench of the processing equipment to limit the cylindrical bottom shell.
[0012] In order to improve the accuracy of the cooperation between the limiting socket and the positioning pin, the inner side of the limiting socket has two inclined and oppositely arranged first positioning slopes, and the top end of the positioning pin has a second positioning slope that cooperates with the first positioning slopes.
[0013] In addition, a notch is provided on the cylindrical bottom shell, and one side of the notch passes through the circular opening groove, so that when a concave lens is placed in the circular opening groove, the side of the concave lens is partially exposed at the notch.
[0014] In a possible implementation, two notches are provided, and the two notches are symmetrically arranged on two sides of the cylindrical bottom shell.
[0015] In the embodiment of the utility model, a circular opening groove for matching with a concave lens is provided on one side of the cylindrical bottom shell, and a boss for matching with the recessed part of the concave lens is formed in the center of the circular opening groove, and an annular groove for accommodating the edge of the concave lens is formed between the outer edge of the boss and the inner wall of the circular opening groove, and the width of the annular groove is consistent with the edge thickness of the concave side of the concave lens. During the specific operation, the recessed part of the concave lens is directed toward the circular opening groove, and its edge is clamped into the annular groove formed above, so that the concave lens is well limited around. This design ensures the stable fixation of the concave lens in the fixture through precise size matching, and avoids the displacement of the lens during the processing process. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the clamp and the concave lens in the embodiment of the present application;
[0017] Figure 2 is a cross-sectional view of a clamp in an embodiment of the present application;
[0018] Figure 3This is a schematic diagram of the position of the notch in the embodiment of the present application;
[0019] Figure 4 Schematic diagram of the structure of the positioning pin in the embodiment of the present application. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.
[0021] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present invention. As used in the specification and appended claims of the present invention, the singular expressions "a", "an", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.
[0022] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0023] Example 1: See Figure 1-3 , an edge grooving fixture for controlling the center thickness of a lens, comprising a cylindrical bottom shell 100, a circular opening groove 102 for matching with a concave lens is formed on one side of the cylindrical bottom shell 100, and a boss 103 for aligning with a concave portion of the concave lens is formed at the center of the circular opening groove 102;
[0024] The cylindrical bottom shell 100 is made of a hard material (such as plastic) to ensure its structural stability. The diameter of the circular opening groove 102 is slightly larger than the outer diameter of the concave lens so that the lens can be smoothly placed. The shape of the boss 103 matches the concave part of the lens to ensure that the lens can be stably and accurately positioned when placed.
[0025] An annular groove for accommodating the edge of the concave lens is formed between the outer edge of the boss 103 and the inner wall of the circular opening groove 102, and the width of the annular groove is consistent with the edge thickness of the concave side of the concave lens. The width of the annular groove is designed to be equal to the thickness of the edge of the lens through calculation to ensure that the lens will not shake or fall off during processing. The diameter of the circular opening groove 102 is slightly larger than the outer diameter of the concave lens so that the lens can be smoothly placed. For example, assuming that the outer diameter of the lens is D, the diameter of the circular opening groove 102 can be designed to be D+0.1mm, which not only ensures that the lens can be smoothly placed, but also avoids excessive gaps. The height of the boss 103 can be set to half the depth of the recessed part of the lens to ensure that the lens is stably placed.
[0026] like Figure 1-2 As shown, in the specific operation, the concave portion of the concave lens 300 is directed toward the circular opening groove 102, and its edge is inserted into the annular groove 121 formed above, so that the concave lens is well limited around. This design ensures the stable fixation of the concave lens in the fixture through precise size matching, avoiding shaking and falling off during processing.
[0027] Furthermore, a buffer layer 131 is provided at the outer end of the boss 103, and the buffer layer 131 covers the entire outer end surface of the boss 103. The buffer layer 131 is made of a soft material (such as rubber or silicone) to prevent scratches or damage to the lens during processing.
[0028] The outer periphery of the boss 103 is provided with an arc chamfer to make its edge smoother, so as to avoid damage to the concave lens when it is aligned with the concave side of the concave lens.
[0029] Example 2: See Figure 2 and 4 The bottom of the cylindrical bottom shell 100 has at least one limiting hole 104, and the limiting hole 104 is used to align with the positioning pin 200 on the workbench of the processing equipment to limit the cylindrical bottom shell 100.
[0030] One or more limiting holes 104 are provided at the bottom of the cylindrical bottom shell 100, and the positions and number of these holes are determined according to the layout of the positioning pins 200 on the processing equipment workbench. The first positioning inclined surface 141 and the second positioning inclined surface 201 are designed to have an inclination angle of 45°, which is easy to manufacture and can ensure accurate matching and positioning.
[0031] In order to improve the accuracy of the cooperation between the limiting hole 104 and the positioning pin 200, the inner side of the limiting hole 104 has two inclined and oppositely arranged first positioning slopes 141, and the top end of the positioning pin 200 has a second positioning slope 201 that cooperates with the first positioning slope 141.
[0032] For example, if two positioning pins 200 are provided on the processing equipment workbench, two limit sockets 104 are correspondingly provided at the bottom of the fixture, and the spacing between the two sockets is equal to the spacing between the two positioning pins on the workbench. When the fixture is placed on the workbench, the positioning pins 200 are smoothly inserted into the limit sockets 104, and accurate positioning is achieved through the guidance of the inclined surface.
[0033] In this embodiment, the fast and accurate positioning of the fixture on the processing equipment is achieved through the cooperation between the limit socket and the positioning pin, thereby improving the processing efficiency and precision. At the same time, the design of the inclined surface increases the stability of the cooperation and prevents the fixture from shifting during the processing.
[0034] Example 3: See Figure 3 A notch 105 is formed on the cylindrical bottom shell 100, and one side of the notch 105 passes through the circular opening groove 102, so that when a concave lens is placed in the circular opening groove 102, the side of the concave lens is partially exposed at the notch 105, so as to facilitate taking out the concave lens from the notch 105 after processing.
[0035] In a possible implementation, if the diameter of the concave lens is D, a notch 105 with a width of D / 4 can be opened on both sides of the fixture. The two notches are arranged symmetrically, which not only facilitates the removal of the lens, but also maintains the structural symmetry of the fixture. The edge of the notch is chamfered by 0.5 mm to ensure safety during removal.
[0036] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.
Claims
1. An edge grooving fixture for controlling the center thickness of a lens, characterized in that: It comprises a cylindrical bottom shell (100), one side of the cylindrical bottom shell (100) is provided with a circular opening groove (102) for matching with a concave lens, and the central part of the circular opening groove (102) is formed with a boss (103) for aligning with a recessed part of the concave lens; An annular groove for accommodating the edge of the concave lens is formed between the outer edge of the boss (103) and the inner wall of the circular opening groove (102), and the width of the annular groove is consistent with the edge thickness of the concave surface side of the concave lens; The cylindrical bottom shell (100) is provided with a notch (105), and one side of the notch (105) passes through the circular opening groove (102), so that when a concave lens is placed in the circular opening groove (102), a side portion of the concave lens is partially exposed at the notch (105).
2. The edge grooving fixture for controlling the center thickness of a lens as claimed in claim 1, characterized in that: A buffer layer (131) is provided at the outer end of the boss (103), and the buffer layer (131) covers the entire outer end surface of the boss (103).
3. The edge grooving fixture for controlling the center thickness of a lens as claimed in claim 1, characterized in that: The outer periphery of the boss (103) is provided with an arc chamfer.
4. An edge grooving fixture for controlling the center thickness of a lens as claimed in claim 2 or 3, characterized in that: The bottom of the cylindrical bottom shell (100) has at least one limiting insertion hole (104), and the limiting insertion hole (104) is used to align with the positioning pin (200) on the workbench of the processing equipment, so as to limit the cylindrical bottom shell (100).
5. The edge grooving fixture for controlling the center thickness of a lens as claimed in claim 4, characterized in that: The inner side of the limiting insertion hole (104) has two inclined and oppositely arranged first positioning inclined surfaces (141), and the top end of the positioning pin (200) has a second positioning inclined surface (201) that is oppositely matched with the first positioning inclined surface (141).
6. The edge grooving fixture for controlling the center thickness of a lens as claimed in claim 1, characterized in that: Two notches (105) are provided, and the two notches (105) are symmetrically arranged on both sides of the cylindrical bottom shell (100).