Pressure-balanced multifunctional clamping device for optical element
By designing a multifunctional clamping device including bottom plate, slide rail, universal fixture and pressure sensor, the problem of individual custom fixtures and unbalanced clamping stress of complex curved optical components is solved, and the balanced pressure clamping and high-precision detection of optical components is achieved.
Patent Information
- Application Number
- CN202422248672.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, complex curved optical components require separate custom tooling and fixtures, and the clamping stress is unbalanced, resulting in high processing and detection, high cost, and difficult to ensure surface shape accuracy.
A multifunctional clamping device including a base plate, a slide rail, a universal fixture, a precision linear displacement table and a pressure sensor is designed to realize adaptive clamping of optical components through sliders and locking handwheels, and monitor clamping stress by using precision adjustment and pressure sensors to achieve pressure equalization at each clamping point.
The equalized pressure clamping of complex curved optical elements is realized, which reduces the problem of unbalanced clamping stress, improves the surface shape accuracy and versatility of the clamping device, simplifies the operation steps and reduces costs.
Smart Images
Figure CN223186379U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a clamping device for optical elements, in particular to a multifunctional clamping device for optical elements with balanced pressure. Background Art
[0002] With the advancement of technology, precision instruments and cutting-edge products are placing increasingly higher demands on the quality of optical components. For example, in some products, the reflection and refraction of light require that the surface roughness (Ra) of optical components be less than 1 / 10 of the wavelength of light, and the surface shape accuracy (PV value) be less than 10 times the Ra. In other words, the accuracy needs to reach the micron, submicron, and even nanometer levels, which places extremely high demands on the processing and inspection aspects of optical component manufacturing technology.
[0003] However, errors are inherent in any manufacturing process. Surface error refers to the deviation between the actual surface shape of an optical component and its ideal design. This surface error significantly impacts the overall performance of the optical system. Therefore, high-precision surface measurement is essential to determine surface error in order to evaluate and guide the manufacturing process and ensure that the optical component meets manufacturing accuracy requirements.
[0004] Optical components with complex curved surfaces have high surface complexity and require high surface accuracy, making surface inspection more challenging. During processing and inspection, they require fixtures to hold them. Due to the wide variety and diverse shapes of complex curved surfaces, the fixtures used for each optical component are individually customized, lacking universality, making their design difficult and costly. Furthermore, due to the high surface accuracy requirements, the fixtures are extremely sensitive to the magnitude and consistency of the clamping stress. Complex curved surfaces of varying shapes can lead to unbalanced clamping stress in most custom fixtures. Summary of the Invention
[0005] The purpose of the utility model is to solve the technical problems in the prior art that complex curved optical elements require individually customized fixtures and their clamping stress is unbalanced, and to provide a multifunctional clamping device for optical elements with balanced pressure.
[0006] In order to achieve the above objectives, the technical solutions provided by this utility model are as follows:
[0007] A multifunctional clamping device for optical components with balanced pressure, which is special in that:
[0008] Including base plate;
[0009] At least one slide rail is provided on the base plate, and each slide rail is provided with a set of two universal clamps facing each other through two sliders, the two universal clamps respectively forming an active clamping end and a passive clamping end, and a locking handwheel is provided on the slider for locking the position of the slider on the slide rail; at least one slide rail is provided in a centrally symmetrical manner;
[0010] The clamping end surface of the universal clamp is equipped with densely distributed and independently retractable clamping pins, which are used to abut against the edge of the optical component and then retract under force, adaptively clamping optical components of different shapes. The universal clamp is equipped with a locking handle, which is used to lock the position of the clamping pins relative to the optical component or extend and reset the clamping pins.
[0011] A precision linear translation stage is provided between the universal fixture at the active clamping end and the slider of the slide rail;
[0012] The precision linear translation stage is fixed on the slider of the slide rail; the precision linear translation stage is provided with a precision slide rail in the same direction as the slide rail, and the universal fixture at the active clamping end is set on the precision slide rail through the slider; the precision linear translation stage is provided with a support plate at the end away from the center of the slide rail, and the adjustment handwheel is set on the side of the support plate away from the center of the slide rail. The adjustment end of the handwheel passes through the support plate and is connected to the universal fixture at the active clamping end, which is used to adjust the position of the universal fixture on the precision slide rail, thereby achieving secondary precision adjustment relative to the slide rail.
[0013] A pressure sensor is provided between the adjusting end of the adjusting handwheel and the universal clamp at the active clamping end. The two end faces of the pressure sensor are respectively connected to the adjusting end of the adjusting handwheel and the universal clamp at the active clamping end, and are used to monitor the clamping stress of the two universal clamps on the slide rail.
[0014] Furthermore, the passive clamping end is also provided with a precision linear displacement stage, which has the same structural arrangement as the active clamping end.
[0015] Furthermore, a digital display screen is provided on the pressure sensor for real-time monitoring and display of the clamping stress for easy adjustment.
[0016] Furthermore, both the slide rail and the precision slide rail are slide rails with an I-shaped cross section.
[0017] Furthermore, there are two slide rails, which have the same structure, are cross-arranged, and have flush upper and lower surfaces.
[0018] Furthermore, the two slide rails are perpendicular to each other; and the bottom plate is a cross-shaped structure.
[0019] Furthermore, the pressure sensor adopts a strain gauge sensor.
[0020] Furthermore, the clamping needle of the universal clamp is provided with a polytetrafluoroethylene protective sleeve.
[0021] Compared with the prior art, the present invention has the following advantages:
[0022] 1. The utility model provides a multifunctional clamping device for optical elements with balanced pressure. Through the design of a precision linear translation stage, the clamping stress is fine-tuned to achieve pressure balance at each clamping point. According to the design requirements of the optical element, the influence of the tooling on the surface shape of the optical element is controlled within the allowable range.
[0023] 2. The utility model provides a multifunctional clamping device for optical elements with balanced pressure, which adopts a universal clamp with multiple needle-type contact heads (i.e., a universal clamp). A polytetrafluoroethylene protective cover is added to its contact head (i.e., the clamping needle) to protect the contact surface between the optical element lens and the clamping device. It is suitable for clamping optical elements of different shapes and has universality.
[0024] 3. The utility model provides a multifunctional clamping device for optical elements with balanced pressure, which uses a strain gauge pressure sensor and has the advantages of high sensitivity, accurate measurement and compact structure.
[0025] 4. The utility model provides a multifunctional clamping device for optical elements with balanced pressure. The pressure sensor is equipped with a digital display screen, which can monitor and display the clamping stress of the universal clamp in real time. It is convenient and fast and simplifies the adjustment steps.
[0026] 5. The utility model provides a multifunctional clamping device for optical elements with balanced pressure, which has simple composition, simple operation, strong adaptability and feasibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The utility model is a structural schematic diagram of an embodiment of a multifunctional clamping device for optical elements with balanced pressure.
[0028] The following are the descriptions of the accompanying figures:
[0029] 1-base plate; 2-slide rail, 21-locking handwheel; 3-universal fixture; 4-precision linear translation stage, 41-precision slide rail, 42-adjusting handwheel; 5-pressure sensor. DETAILED DESCRIPTION
[0030] The specific technical solutions in the embodiments of the present invention will be further described below with reference to the accompanying drawings.
[0031] According to the clamping requirements of existing optical components with complex curved surfaces, during the processing or inspection process, on the one hand, the optical components should be stably fixed, and on the other hand, the clamping stress of the optical components should be minimized, and the consistency of the clamping stress at each clamping point should be maintained to control the surface distortion of the optical components within the required range.
[0032] like Figure 1As shown, an embodiment of the present invention provides a multifunctional clamping device for optical elements with balanced pressure, comprising a base plate 1, a universal fixture 3, a precision linear translation stage 4, a pressure sensor 5 (connected to a digital display screen) and slide rails and sliders of different specifications.
[0033] The base plate 1 is a cross-shaped structure, equipped with two mutually perpendicular and centrally symmetrical slide rails 2. These two slide rails 2 are identical in structure, arranged in a cross pattern, and have flush upper and lower surfaces. A set of two universal clamps 3 facing each other are mounted on each of the two slide rails 2, each of which forms an active clamping end and a passive clamping end, respectively. Locking handwheels 21 are installed on the sliders of the slide rails 2, and the universal clamps 3 can be locked in position using these locking handwheels 21.
[0034] The clamping end surface of the universal clamp 3 is provided with densely distributed and independently retractable clamping needles, which are respectively retracted under force after abutting against the edge of the optical element, and can adaptively clamp optical elements of different shapes; the clamping needles are covered with a polytetrafluoroethylene protective sleeve.
[0035] The universal clamp 3 is provided with a locking handle, which has two working states (achieved by turning the handle). After the clamping needle contacts the edge of the optical element, the locking state is switched to lock the clamping needle relative to the optical element; after clamping is completed, the unlocking state is switched to extend and reset the clamping needle. The universal clamp 3 in the embodiment of the present invention is manufactured by Hangzhou Jinglian Technology Co., Ltd., China, and is a product of the AXXP-3079 series. Other multi-needle contact clamps or contact chucks with similar structures can also achieve similar technical effects by simply adaptively clamping optical elements with complex curved surfaces.
[0036] A precision linear displacement table 4 is provided between the universal fixture 3 at the active clamping end and the slider of the slide rail 2; to save costs, the universal fixture 3 at the passive clamping end is directly provided on the slider of the slide rail 2 without a precision linear displacement table 4.
[0037] The precision linear translation stage 4 is fixed to the slider of the slide rail 2. The precision linear translation stage 4 is equipped with a precision slide rail 41 running in the same direction as the slide rail 2. The universal fixture 3 at the active clamping end is mounted on the precision slide rail 41 via the slider. A support plate is provided at the end of the precision linear translation stage 4 away from the center of the slide rail 2. An adjustment handwheel 42 is located on the side of the support plate away from the center of the slide rail 2. Its adjustment end passes through the support plate and connects to the universal fixture 3 at the active clamping end. The adjustment handwheel 42 is used to push the universal fixture 3 on the precision slide rail 41 of the precision linear translation stage 4, adjusting the position of the universal fixture 3 on the precision slide rail 41 and achieving secondary precision adjustment relative to the slide rail 2. Both the slide rail 2 and the precision slide rail 41 have an I-shaped cross-section.
[0038] A strain gauge pressure sensor 5 is installed between the adjustment end of the adjustment handle 42 and the active clamping end of the universal clamp 3. The two end faces of the pressure sensor 5 are connected to the adjustment end of the adjustment handle 42 and the active clamping end of the universal clamp 3, respectively. A digital display is installed on the pressure sensor 5 to monitor and display the clamping stress of the two universal clamps 3 on the slide rail 2 in real time.
[0039] According to the clamping stress of the two sets of universal clamps 3 (ie, the readings of the two pressure sensors 5 ), each universal clamp 3 is adjusted to achieve pressure balance of the clamping device.
[0040] In the embodiment of the present invention, two sets of universal clamps 3 can achieve four-point balanced pressure clamping of the clamped part, and the pressure is controllable. According to the different shape requirements of the clamped part, in other embodiments of the present invention, one or more sets of universal clamps can be used.
[0041] The method of use provided by the embodiment of the utility model is to adjust the position of the two sliders (coarse adjustment) according to the shape of the clamped object, so that the clamping needle head of the universal clamp 3 contacts the clamped object, and then fix the position of the slider by locking the hand wheel 21, and then perform fine adjustment. The specific steps are as follows:
[0042] S1, pre-adjust the four universal clamps 3 and adjust the sliders on the slide rails 2 so that their positions match the clamped parts;
[0043] S2, centering the clamped part, roughly adjusting the four universal clamps 3, and adjusting the sliders so that their positions on the slide rails 2 meet the condition that the clamping pins abut against the edges of the clamped part;
[0044] S3, fix the position of the slider by locking the hand wheel 21;
[0045] At this time, the universal clamp 3 at the passive clamping end is in a fixed position;
[0046] S4, fine-tune the universal clamp 3 at the active clamping end by adjusting the adjustment hand wheel 42 so that its position on the precision slide rail 41 satisfies the condition that the readings of the two pressure sensors 5 meet the requirements and are consistent;
[0047] S5, locking the position of the clamping needle by the locking handle of the universal clamp 3;
[0048] At this time, the universal clamp 3 at the active clamping end is in a fixed position, that is, balanced pressure clamping is achieved.
[0049] The above content is only an embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is included in the scope of patent protection of the present invention.
Claims
1. A multifunctional clamping device for optical components with balanced pressure, characterized by: comprising a base plate (1); At least one slide rail (2) is provided on the base plate (1), and each slide rail (2) is provided with a set of two universal clamps (3) facing each other through two sliders, and the two universal clamps (3) respectively constitute an active clamping end and a passive clamping end, and a locking hand wheel (21) is provided on the slider for locking the position of the slider on the slide rail (2); the at least one slide rail (2) is arranged in a central symmetrical manner; The clamping end surface of the universal clamp (3) is provided with densely distributed and independently retractable clamping needles, which are used to retract after being forced into contact with the edge of the optical element, and adaptively clamp optical elements of different shapes; the universal clamp (3) is provided with a locking handle, which is used to lock the position of the clamping needles relative to the optical element, or to extend and reset the clamping needles; A precision linear displacement platform (4) is provided between the universal fixture (3) of the active clamping end and the slider of the slide rail (2); The precision linear displacement table (4) is fixed on the slider of the slide rail (2); a precision slide rail (41) in the same direction as the slide rail (2) is provided on the precision linear displacement table (4), and the universal clamp (3) at the active clamping end is arranged on the precision slide rail (41) through the slider; a support plate is provided at one end of the precision linear displacement table (4) away from the center of the slide rail (2); an adjusting hand wheel (42) is arranged on a side of the support plate away from the center of the slide rail (2), and its adjusting end passes through the support plate and is connected to the universal clamp (3) at the active clamping end, and is used to adjust the position of the universal clamp (3) on the precision slide rail (41), thereby realizing secondary precision adjustment relative to the slide rail (2); A pressure sensor (5) is provided between the adjusting end of the adjusting hand wheel (42) and the universal clamp (3) at the active clamping end. Two end faces of the pressure sensor (5) are respectively connected to the adjusting end of the adjusting hand wheel (42) and the universal clamp (3) at the active clamping end, and are used to monitor the clamping stress of the two universal clamps (3) on the slide rail (2).
2. The multifunctional clamping device for optical elements with balanced pressure according to claim 1, characterized in that: The passive clamping end is also provided with a precision linear displacement platform (4), which has the same structural arrangement as the active clamping end.
3. The multifunctional clamping device for optical elements with balanced pressure according to claim 1, characterized in that: The pressure sensor (5) is provided with a digital display screen for real-time monitoring and display of the clamping stress, facilitating adjustment.
4. The multifunctional clamping device for optical elements with balanced pressure according to claim 3, characterized in that: The slide rail (2) and the precision slide rail (41) are both slide rails with an I-shaped cross section.
5. A multifunctional clamping device for optical elements with balanced pressure according to any one of claims 1 to 4, characterized in that: There are two slide rails (2), the two slide rails (2) have the same structure, are cross-arranged, and have upper and lower surfaces that are flush.
6. The multifunctional clamping device for optical elements with balanced pressure according to claim 5, characterized in that: The two slide rails (2) are perpendicular to each other; and the bottom plate (1) is a cross-shaped structure.
7. The multifunctional clamping device for optical elements with balanced pressure according to claim 6, characterized in that: The pressure sensor (5) is a strain gauge sensor.
8. The multifunctional clamping device for optical elements with balanced pressure according to claim 7, characterized in that: The clamping needle of the universal clamp (3) is provided with a polytetrafluoroethylene protective sleeve.