A real-time centering and correction lens centering and edge grinding machine

Abstract

This utility model discloses a real-time centering and correcting lens edging machine, which has an upper clamping member and a lower clamping member mounted on a support member. Each of the upper and lower clamping members has a clamping head at its opposite end. The upper clamping member can vertically displace to cooperate with the clamping heads and the lower clamping member to clamp the lens. The upper and lower clamping members are driven to rotate synchronously by a drive member. A grinding component is provided on the support member, capable of two-axis displacement to approach the clamping heads, for grinding the lens clamped by the clamping heads. The upper clamping member has a centering element, and the grinding component has a correction element that cooperates with the centering element to adjust the lens position. This solves the problem in existing lens edging machines that cannot quickly center and clamp lenses online.

Description

Technical Field

[0001] This utility model relates to the field of lens processing technology, specifically to a real-time centering and correction lens centering and edge grinding machine. Background Technology

[0002] In the field of high-end optical component manufacturing, lenses, as core components of precision imaging systems, directly determine the imaging quality and performance of optical equipment through their centering accuracy. Taking products such as medical endoscope lenses and lithography machine projection lenses as examples, the coaxiality requirement between the optical center and the mechanical center of the lens typically needs to be below ±1μm, which places extremely high technical standards on the lens centering and edging process.

[0003] Existing lens centering and edging machines face significant technical bottlenecks in the lens clamping process during actual processing. Due to factors such as lens blank dimensional tolerances, wear of the clamping mechanism, and human error, it is difficult to accurately position the lens to the center of the machine during clamping. Even with high-precision clamping fixtures, a radial offset of ±0.02-±0.05mm still occurs, causing a deviation between the lens's rotation axis and optical axis. This deviation results in uneven grinding of the lens edge by the edging tool, leading to inconsistent lens edge thickness and severely impacting the lens's optical performance and assembly accuracy.

[0004] To address the issue of lens clamping misalignment, traditional processes often employ external auxiliary equipment for secondary alignment correction, such as manually adjusting the support or using a laser alignment instrument for position calibration. However, this approach has significant drawbacks: firstly, the external equipment must be operated while the grinding machine is stopped, with each correction taking approximately 3-5 minutes, resulting in a 20%-40% reduction in processing efficiency per batch of lenses; secondly, the external equipment and the grinding machine's control system are independent, making it difficult to synchronize the corrected parameters with the grinding process in real time, often leading to secondary clamping errors or over-correction, resulting in an 8%-12% defect rate even after correction. Furthermore, for complex optical components such as aspherical lenses and irregularly shaped lenses, external equipment struggles to adapt to their irregular shapes, making correction operations difficult and compromising accuracy. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing lens edging machines cannot quickly center and clamp lenses online, and to provide a lens centering and edging machine with real-time centering correction.

[0006] To address the shortcomings of the aforementioned technical problems, the present invention employs the following technical solution: a real-time centering and correcting lens centering and edge grinding machine, comprising an upper clamping member and a lower clamping member mounted on a support member. Each of the upper and lower clamping members has a clamping head at its opposite end. The upper clamping member can vertically displace to cooperate with the clamping head and the lower clamping member in clamping the lens. Both the upper and lower clamping members are driven to rotate synchronously by a driving member. A grinding component is mounted on the support member, capable of displacing close to the clamping head, to grind the lens clamped by the clamping head. A centering member is mounted on the upper clamping member, and a correction member is mounted on the grinding component to adjust the lens position in coordination with the centering member.

[0007] The centering device includes a centering hole on the upper clamping member. The centering hole is concentric with the through hole at the center of the clamping head. A collimator is rotatably installed inside the centering hole. The collimator is connected to a CCD camera installed on the upper clamping member to determine whether the center of the lens is aligned with the through hole of the clamping head.

[0008] The correction element includes a correction head driven by a grinding assembly, the end of the correction head facing the clamping head being spherical.

[0009] As a further optimization of the real-time centering and correction lens centering and edge grinding machine of this utility model: the collimator adopts photoelectric collimation equipment.

[0010] As a further optimization of the real-time centering correction lens edging machine of this utility model: the correction component also includes a protective cover on the grinding assembly. The protective cover is set corresponding to the grinding disc of the grinding assembly, and the protective cover has a notch facing the clamping head. The protective cover is provided with a support frame and multiple connecting screws for positioning the support frame. The end of the support frame facing the clamping head is rotatably connected to a support cylinder. The end of the support cylinder extending out of the support frame is provided with a positioning groove. The positioning groove cooperates with the correction head to position the correction head on the support frame.

[0011] As a further optimization of the real-time centering and correction lens centering and edging machine of this utility model: a horizontal annular groove is provided on the support frame, the groove is arranged around the protective cover, and the connecting screw cooperates with the groove to position or assist in adjusting the corresponding notch of the support frame.

[0012] As a further optimization of the real-time centering and correction lens centering and edge grinding machine of this utility model: the end of the bearing cylinder that protrudes from the bearing frame is threaded with a fastening screw, and the fastening screw is inserted into the positioning groove and connected to the correction head.

[0013] As a further optimization of the real-time centering and correction lens centering and edge grinding machine of this utility model: the outer periphery of the fastening screw is provided with anti-slip texture.

[0014] As a further optimization of the real-time centering correction lens centering and edge grinding machine of this utility model: the support includes a support base and a processing bracket located at the center of the upper side of the support base. The processing bracket is provided with an upper clamping member and a lower clamping member on both sides in the width direction.

[0015] As a further optimization of the real-time centering correction lens grinding machine of this utility model: the outer periphery of the support base is covered with a baffle, and the support base is provided with a collection groove at each of the two work stations, and the collection groove is provided with a discharge hole for discharging waste into the support base.

[0016] As a further optimization of the real-time centering correction lens centering and edging machine of this utility model: the driving component includes a drive motor and a transmission shaft mounted on the support component. The two ends of the transmission shaft are respectively provided with a first gear and a second gear. The first gear and the second gear mesh with the driven gear and the synchronous gear respectively. The synchronous gear drives the lower clamping component to rotate, and the driven gear drives the upper clamping component to rotate. The first gear meshes with the drive gear on the output shaft of the drive motor.

[0017] As a further optimization of the real-time centering and correction lens centering and edge grinding machine of this utility model: the upper clamping member and the lower clamping member are arranged vertically or horizontally.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention utilizes a CCD camera and a collimator positioned at the center of the upper clamping member to jointly measure whether the lens held by the upper and lower clamping members is aligned. When the lens is aligned, the image captured by the collimator and CCD camera shows a significant difference in light spot recognition compared to the image when the lens is misaligned, thus enabling rapid determination of the lens's alignment status. Subsequently, with the aid of a corresponding CNC system, the trimming assembly drives the correction head to press against the lens held by the upper and lower clamping heads, while simultaneously coordinating with a drive component to rotate the lens, ensuring that the correction head can quickly adjust the lens to be aligned with the two clamping heads, thereby facilitating high-quality polishing of the lens by the trimming assembly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the axial side structure of this utility model;

[0021] Figure 2 This utility model Figure 1 Schematic diagram of the structure at point A in the diagram;

[0022] Figure 3 This is a schematic diagram of the first cross-sectional structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the second cross-sectional structure of the present invention;

[0024] Figure 5 This utility model Figure 4 A magnified structural diagram at point I in the diagram;

[0025] The diagram shows the following components: 1. Support component; 101. Support base; 102. Baffle; 103. Collection groove; 104. Processing bracket; 105. Impurity discharge hole; 2. Correction component; 201. Protective cover; 202. Bearing frame; 203. Connecting screw; 204. Slide groove; 205. Fastening screw; 206. Correction head; 207. Bearing cylinder; 208. Positioning groove; 3. Grinding assembly; 4. Drive component; 401. Drive motor; 402. Drive gear; 403. First gear; 404. Transmission shaft; 405. Second gear; 406. Driven gear; 407. Synchronizing gear; 5. Upper clamping component; 6. Clamping head; 7. Lower clamping component; 8. Centering component; 801. Centering hole; 802. Collimator; 803. CCD camera. Detailed Implementation

[0026] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0027] like Figure 1 As shown, a real-time centering and correcting lens centering and edging machine has an upper clamping member 5 and a lower clamping member 7 connected to a clamping head 6 at opposite ends. Specifically, the clamping head 6 and another clamping head 6 are threadedly connected to the upper clamping member 5 and the lower clamping member 7 at opposite ends, respectively. The lower clamping member 7 is disposed on a support base 101 included in the support member 1. The upper clamping member 5 can slide vertically on the processing bracket 104 included in the support member 1. Under the drive of a corresponding driving device, it matches and clamps the positioning lens with the lower clamping member 7 and the clamping head 6. Both the upper clamping member 5 and the lower clamping member 7 are driven by a driving member 4 disposed on the support member 1. The driving member 4 can drive the upper clamping member 5 and the lower clamping member 7 to rotate synchronously, so that the lens clamped by the clamping head 6 and the other clamping head 6 rotates stably. The support member 1 is also equipped with a grinding assembly 3 controlled by a CNC system. The grinding assembly 3 is located on the support member 1 and can move vertically and horizontally toward the lens to perform corresponding grinding on the lens. The grinding assembly 3 includes a grinding disc with a correction component 2. The correction component 2 cooperates with the centering component 8 located in the upper clamping head 6 to perform center alignment correction on the lens held by the upper clamping member 5 and the lower clamping member 7. After correction, there is no need to move the lens position. Only the correction component 2 needs to be moved to expose the grinding disc to perform high-quality grinding of the lens.

[0028] like Figure 3As shown, the centering component 8 includes a centering hole 801 located at the center of the upper clamping component 5. The centering hole 801 passes through the upper clamping component 5 vertically, and its center is concentric with that of the lower clamping component 7. A collimator 802 is rotatably mounted inside the centering hole 801. The collimator 802 is connected to a CCD camera 803 located at the end of the upper clamping component 5 away from the lower clamping component, thereby maintaining the accuracy of the shooting measurement when the upper clamping head 6 drives the lens to rotate. The CCD camera 803 is connected to an external CNC system, which can control the grinding assembly 3 to displace the correction component 2 and adjust the position of the lens during the rotation process so that the two clamping heads 6 correspond to the center of the lens, thereby ensuring the quality of the subsequent grinding process of the grinding assembly 3. The collimator 802 adopts a photoelectric collimation device. The collimator 802 uses a lens system to convert the light beam emitted by the point light source on the collimator 802 into parallel light, i.e., collimated light, to form a reference optical axis. Ideally, the divergence angle of parallel light approaches zero, serving as a benchmark for spatial straightness. Simultaneously, photoelectric sensors such as CCD and CMOS can be used to receive reflected or transmitted collimated beams. In this embodiment, a CCD camera 803 is used to analyze changes in the position and shape of the light spot through image recognition technology, converting optical deviations into electrical signals or digital quantities to achieve high-precision measurement. Specifically, the difference in refractive index between the lens's center point and non-center points results in different shapes and sizes of light spots in the image recognition, aligning the center of the through-hole of the clamping head 6 with the lens center. During lens alignment, the images captured by the collimator 802 and the CCD camera 803 show significant differences compared to the image spot when the lens is not aligned, allowing for rapid determination of the lens's alignment status.

[0029] like Figure 1-5 As shown, the correction component 2 includes a protective cover 201 disposed on the grinding assembly 3, which can move with the grinding assembly 3 and is positioned corresponding to the grinding disc. The protective cover 201 has a notch that exposes the grinding disc, and the outer periphery of the protective cover 201 is provided with a support frame 202 and multiple connecting screws 203. The support frame 202 has a horizontal annular groove 204 arranged around the protective cover 201. The groove 204 slides and engages with the connecting screws 203 to position the support frame 202, and allows the support frame 202 to rotate on the protective cover 201 to move to the notch of the protective cover 201 or to make room for the grinding disc to grind the lens. A support cylinder 207 is rotatably mounted on the support frame 202. The support cylinder 207 passes through the support frame 202 and has a positioning groove 208. The positioning groove 208 faces the clamping head 6, and a correction head 206 is provided within the positioning groove 208. Specifically, the end of the correction head 206 facing the clamping head 6 is spherically shaped to better contact the lens and adjust its position, ensuring that the clamping head 6 clamps the center of the lens. Figure 2 and Figure 5As shown, the end of the bearing cylinder 207 extending out of the bearing frame 202 is threaded with a fastening screw 205. The fastening screw 205 can pass through the positioning groove 208 to press against the correction head 206, thereby positioning the correction head 206 and maintaining the stability of the connection between the correction head 206 and the bearing frame 202. At the same time, it allows the operator to adjust the angle of the correction head 206 according to specific conditions. The fastening screw 205 has anti-slip texture on its outer circumference, which facilitates the operator's rotation.

[0030] The specific model, structure, and how the grinding assembly 3 and the upper clamping component 5 are coordinated with the CNC system for displacement should be understood as existing technology. The motion accuracy of the CNC system is ±1μm, and the model and motion method of the CNC system are also existing technology. The upper clamping component 5 adopts a pneumatic structure and is equipped with a pressure sensor to dynamically adjust the upper clamping shaft connected to the clamping head 6, that is, to dynamically adjust the position of the clamping head 6, so as to ensure stable clamping of the lens and avoid damage to the lens due to excessive clamping force.

[0031] like Figure 4 As shown, the driving component 4 includes a driving motor 401 mounted on the processing bracket 104. A driving gear 402 is fixedly mounted on the output shaft of the driving motor 401. The driving gear 402 drives a first gear 403. The first gear 403 rotates synchronously with a second gear 405 through a transmission shaft 404 rotatably mounted inside the processing bracket 104. The first gear 403 and the second gear 405 mesh with the driven gear 406 and the synchronous gear 407 of the driving upper clamping component 5 and the driving lower clamping component 7, respectively. When the driving motor 401 rotates, the upper clamping component 5 and the lower clamping component 7 can drive the clamping head 6 and another clamping head 6, causing the clamped lens to rotate stably at high speed, so as to cooperate with the grinding parts whose displacement is controlled by the CNC system to perform the lens grinding process.

[0032] The processing bracket 104 has two processing positions arranged along the width direction. That is, the grinding component 3, the upper clamping component 5 and the lower clamping component 7 are all provided in two sets to correspond to the two processing positions, thereby improving the processing efficiency of the lens.

[0033] The support base 101 is surrounded by multiple baffles 102 to enclose its periphery. Collection grooves 103 are provided at two processing positions on the support base 101, corresponding to the two sets of upper clamping members 5 and lower clamping members 7. These grooves collect waste generated during the trimming process of the correction head 206 on the clamping head 6 and another clamping head 6, as well as waste generated during lens grinding, thus reducing the impact of waste on the external environment. A discharge hole 105 is provided at the bottom of the collection groove 103 to guide debris into the support base 101, facilitating the removal of the baffles 102 covering the support base 101 for centralized waste disposal.

[0034] Based on the above principle, the upper clamping member 5 and the lower clamping member 7 can be arranged vertically or horizontally so that the lens centering and edging machine is a vertical or horizontal lens centering and edging machine, that is, the correction member 2 and the centering member 8 can be installed on the protective cover 201 and the upper clamping member 5 included in the vertical or horizontal lens centering and edging machine for use.

[0035] The specific embodiments of this utility model have been described in detail above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A real-time centering and correcting lens centering and edging machine, comprising an upper clamping member (5) and a lower clamping member (7) disposed on a support member (1), wherein clamping heads (6) are provided at opposite ends of the upper clamping member (5) and the lower clamping member (7), and the upper clamping member (5) can be vertically displaced to cooperate with the clamping heads (6) and the lower clamping member (7) to clamp the lens, and both the upper clamping member (5) and the lower clamping member (7) are driven to rotate synchronously by a driving member (4), and a grinding component (3) is provided on the support member (1) that can be displaced to approach the clamping heads (6) to grind the lens clamped by the clamping heads (6), characterized in that: The upper clamping member (5) is provided with a centering member (8), and the grinding assembly (3) is provided with a correction member (2) that cooperates with the centering member (8) to adjust the position of the lens; The centering device (8) includes a centering hole (801) opened on the upper clamping device (5). The centering hole (801) is concentrically arranged with the through hole at the center of the clamping head (6). A collimator (802) is rotatably arranged inside the centering hole (801). The collimator (802) is connected to a CCD camera (803) provided on the upper clamping device (5) to determine whether the center of the lens is aligned with the through hole of the clamping head (6). The correction element (2) includes a correction head (206) driven by the grinding assembly (3), the end of the correction head (206) facing the clamping head (6) being spherical.

2. The real-time centering and correcting lens edging machine as described in claim 1, characterized in that: The collimator (802) is an optoelectronic collimation device.

3. The real-time centering and correcting lens edging machine as described in claim 1, characterized in that: The correction component (2) also includes a protective cover (201) provided on the grinding assembly (3). The protective cover (201) is provided corresponding to the grinding disc of the grinding assembly (3), and the protective cover (201) has a notch facing the clamping head (6). The protective cover (201) is provided with a support frame (202) and a plurality of connecting screws (203) for positioning the support frame (202). The support frame (202) is rotatably connected to the end facing the clamping head (6) with a support cylinder (207). The end of the support cylinder (207) that extends out of the support frame (202) is provided with a positioning groove (208). The positioning groove (208) cooperates with the correction head (206) to position the correction head (206) on the support frame (202).

4. The real-time centering and correcting lens edging machine as described in claim 3, characterized in that: The support frame (202) is provided with a horizontal annular groove (204), which surrounds the protective cover (201). The connecting screw (203) cooperates with the groove (204) to position or assist in adjusting whether the support frame (202) corresponds to the notch.

5. A real-time centering and correcting lens centering and edge grinding machine as described in claim 3, characterized in that: The end of the bearing cylinder (207) that protrudes from the bearing frame (202) is threaded with a fastening screw (205), which is inserted into the positioning groove (208) and connected to the correction head (206).

6. The real-time centering and correcting lens centering and edging machine as described in claim 5, characterized in that: The fastening screw (205) has anti-slip texture on its outer periphery.

7. A real-time centering and correcting lens edging machine as described in claim 1, characterized in that: The support member (1) includes a support base (101) and a processing bracket (104) located at the center of the upper side of the support base (101). The processing bracket (104) has an upper clamping member (5) and a lower clamping member (7) on both sides in the width direction.

8. A real-time centering and correcting lens centering and edge grinding machine as described in claim 7, characterized in that: The outer periphery of the support base (101) is covered with a baffle (102). The support base (101) is provided with a collection groove (103) at each of the two work stations, and a discharge hole (105) is opened in the collection groove (103) for discharging waste into the support base (101).

9. A real-time centering and correcting lens edging machine as described in claim 1, characterized in that: The driving component (4) includes a drive motor (401) mounted on the support (1) and a transmission shaft (404). The two ends of the transmission shaft (404) are respectively provided with a first gear (403) and a second gear (405). The first gear (403) and the second gear (405) mesh with the driven gear (406) and the synchronous gear (407) respectively. The synchronous gear (407) drives the lower clamping component (7) to rotate, and the driven gear (406) drives the upper clamping component (5) to rotate. The first gear (403) meshes with the drive gear (402) mounted on the output shaft of the drive motor (401).

10. A real-time centering and correcting lens edging machine as described in claim 1, characterized in that: The upper clamping member (5) and the lower clamping member (7) are arranged vertically or horizontally.

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