Small-caliber element polishing device

Abstract

The utility model relates to the technical field of optical processing, in particular to a small-caliber element polishing device which comprises a base and a polishing structure arranged on the base. The polishing structure comprises a polishing wheel, a synchronous structure and a supporting seat; the supporting seat is arranged on the base; the two ends of the polishing wheel are arranged on the supporting seat; the synchronous structure is located between the polishing wheel and the supporting base and connected with the polishing wheel, and the other end of the synchronous structure extends into the base so that the synchronous structure can drive the polishing wheel to rotate. The synchronous structure is moved from the tail end to the position between the polishing wheel and the supporting base for transmission, so that the interference area between the optical element and the device is effectively reduced, the machining range is enlarged, the machinable caliber is closer to the size of the polishing wheel, and the polishing surface shape quality and the machining efficiency can be better met.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical processing, and particularly relates to a polishing device for small-diameter components. Background Technique

[0002] Magnetorheological polishing technology is a deterministic optical surface forming method, which has many advantages such as high convergence efficiency, small subsurface damage, and high machining accuracy. After years of research, the domestic magnetorheological polishing technology has become increasingly mature, and the efficient machining of medium and large-diameter and low-steepness optical components has been realized.

[0003] In order to meet the requirements of strength and rigidity, and the magnetic field distribution requirements, the existing polishing wheel is designed in a water-drop shape or a spindle shape, and the diameter of the polishing wheel needs to be controlled to 50 mm or even smaller. At the same time, since a bearing and a transmission structure are connected to the end of the polishing wheel, the interference range between the optical component to be machined and the polishing device is further expanded, seriously exceeding the standard diameter and the ideal machining range of the polishing wheel. This also makes it impossible to process some optical components using this process, and only traditional processing processes can be used. This not only greatly reduces the efficiency, but also cannot achieve the required surface shape accuracy and roughness, and more seriously, it cannot meet the use requirements, bringing more new problems to the design of the magnetic field and transmission structure of the polishing device, the stable control of the circulation of the magnetorheological fluid, and the dressing process. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a polishing device for small-diameter components, which moves the synchronous structure from the end of the polishing wheel to the middle between the polishing wheel and the support seat and conducts transmission, so that within the envelope of the polishing wheel, the space can be compressed as small as possible, the machining range is increased, the machinable diameter is closer to the size of the polishing wheel itself, and the polishing surface quality and machining efficiency can be better satisfied.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A polishing device for small-diameter components includes a base, and a polishing structure arranged on the base; wherein, the polishing structure includes a polishing wheel, a synchronous structure and a support seat; the support seat is arranged on the base; both ends of the polishing wheel are arranged on the support seat; the synchronous structure is located between the polishing wheel and the support seat and is connected with the polishing wheel, and the other end of the synchronous structure extends into the base to drive the polishing wheel to rotate.

[0007] Furthermore, a driving shaft is arranged on one side of the polishing wheel, and the end of the driving shaft is connected with the support seat; the synchronous structure is connected with the driving shaft.

[0008] Further, the synchronization structure includes a synchronous pulley and a synchronous belt tensioned on the synchronous pulley. Among them, the synchronous pulley is coaxially connected to the drive shaft, and the synchronous belt extends into the interior of the base, so that the synchronous belt drives the synchronous pulley to rotate, and then the synchronous pulley drives the polishing wheel to rotate.

[0009] Further, a polishing end cap is provided on the other side of the polishing wheel. A fixed shaft is provided on the connecting side of the polishing end cap. The polishing wheel is coaxially connected to the fixed shaft, and a gap is left between the polishing wheel and the polishing end cap. The fixed side of the polishing end cap is connected to the support base.

[0010] Further, the support base includes a first support frame, a second support frame and a support connecting member. Among them, the bottom of the first support frame is fixed on the base; the top of the first support frame is connected to the fixed side of the polishing end cap; the bottom of the second support frame is arranged on the base through the support connecting member, and a bearing seat is provided on the top of the second support frame, and the end of the drive shaft is connected to the bearing seat through a bearing.

[0011] Further, the width of the bearing is 3 - 4 mm.

[0012] Further, a servo motor is provided inside the base; the synchronous belt is tensioned on the output end of the servo motor.

[0013] Further, the interface of the servo motor extends to the outside of the base; a synchronous belt hole is provided on the top of the base, and the synchronous belt passes through the synchronous belt hole.

[0014] Further, a bottom plate is provided at the bottom of the base, and a handle is provided on the bottom plate.

[0015] Compared with the prior art, the present utility model can achieve the following beneficial effects:

[0016] (1) For the small-diameter component polishing device of the present utility model, on the basis of the existing polishing wheel structure, the end of the polishing wheel is shortened as much as possible. At the same time, in order to reduce the influence brought by the synchronization structure, the synchronization structure is moved from the end of the polishing wheel to the middle between the polishing wheel and the support base for transmission. In this way, within the envelope range of the polishing wheel, the space can be compressed as small as possible, the machining interference area can be reduced, the machining range can be expanded, so that the machinable diameter is closer to the size of the polishing wheel itself, and the polishing surface shape quality and machining efficiency can be better satisfied.

[0017] (2) In the small-diameter component polishing device of the present utility model, a thin bearing with a width of 3 - 4 mm is selected for supporting and positioning the polishing wheel. The optimized removal function remains basically unchanged compared with that before optimization, and the machining range is significantly increased. Description of the Drawings

[0018] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the small-diameter element polishing device according to an embodiment of the present utility model;

[0020] Figure 2 is a top-view structure diagram of the small-diameter element polishing device according to an embodiment of the present utility model;

[0021] Figure 3 is a sectional structure diagram of the small-diameter element polishing device according to an embodiment of the present utility model;

[0022] Figure 4 is a processing schematic diagram of a traditional polishing device;

[0023] Figure 5 is a processing dimension schematic diagram of a traditional polishing device;

[0024] Figure 6 is a processing schematic diagram of the small-diameter element polishing device according to an embodiment of the present utility model;

[0025] Figure 7 is a processing dimension schematic diagram of the small-diameter element polishing device according to an embodiment of the present utility model;

[0026] Figure 8 is a schematic diagram of the interference range of the polishing wheel processing of a traditional polishing device;

[0027] Figure 9 is a schematic diagram of the interference range of the polishing wheel processing of the small-diameter element polishing device according to an embodiment of the present utility model;

[0028] Figure 10 is a schematic diagram of the polishing wheel removal function of a traditional polishing device;

[0029] Figure 11 is a schematic diagram of the polishing wheel removal function of the small-diameter element polishing device according to an embodiment of the present utility model.

[0030] Explanation of reference numerals:

[0031] 1, base; 2, polishing wheel; 3, drive shaft; 4, synchronous belt pulley; 5, synchronous belt; 6, polishing end cover; 7, first support frame; 8, second support frame; 9, support connecting piece; 10, bearing seat; 11, bearing; 12, servo motor; 13, interface; 14, bottom plate; 15, handle; 16, optical element; 17, connection side; 18, fixed side. Detailed implementation manners

[0032] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and do not constitute a limitation to the present utility model.

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, 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 through specific situations.

[0036] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0037] As Figures 1 to 3 shown, the small-diameter element polishing device described in the embodiment of the present utility model includes a base 1 and a polishing structure provided on the base 1.

[0038] The polishing structure includes a polishing wheel 2, a synchronization structure, and a support base. The support base is arranged on a base 1. Both ends of the polishing wheel 2 are arranged on the support base. One end of the synchronization structure is located between the polishing wheel 2 and the support base. The synchronization structure is located between the polishing wheel 2 and the support base and is connected to the polishing wheel 2. The other end of the synchronization structure extends into the base 1, so that the synchronization structure drives the polishing wheel 2 to rotate.

[0039] A driving shaft 3 is arranged on one side of the polishing wheel 2. The end of the driving shaft 3 is connected to the support base, and the synchronization structure is connected to the driving shaft 3.

[0040] The synchronization structure includes a synchronous pulley 4 and a synchronous belt 5 tensioned on the synchronous pulley 4. Among them, the synchronous pulley 4 and the driving shaft 3 are connected together by interference fit. The synchronous belt 5 extends into the interior of the base 1, so that the synchronous belt 5 drives the synchronous pulley 4 to rotate, and then the synchronous pulley 4 drives the polishing wheel 2 to rotate.

[0041] A polishing end cover 6 is arranged on the other side of the polishing wheel 2. A fixed shaft is arranged on the connecting side 17 of the polishing end cover 6. The polishing wheel 2 is sleeved on the fixed shaft, and a gap is left between the polishing wheel 2 and the polishing end cover 6, so that the polishing end cover 6 supports the polishing wheel 2 without hindering the rotation of the polishing wheel 2. The fixed side 18 of the polishing end cover 6 is fixedly connected to the support base.

[0042] The support base includes a first support frame 7, a second support frame 8, and a support connecting piece 9. Among them, the bottom of the first support frame 7 is fixed on the base 1, and the top of the first support frame 7 is connected to the fixed side 18 of the polishing end cover 6. The bottom of the second support frame 8 is installed on the base 1 through the support connecting piece 9. A bearing seat 10 is arranged at the top of the second support frame 8. The end of the driving shaft 3 is coaxially connected to the bearing 11 by interference fit, so that the end of the driving shaft 3 is connected to the bearing seat 10 through the bearing 11.

[0043] A servo motor 12 is arranged inside the base 1, and the synchronous belt 5 is tensioned on the output end of the servo motor 12. The interface 13 of the servo motor 12 extends to the outside of the base 1, and an external power supply can supply power to the servo motor 12 through the interface 13, so that the output end of the servo motor 12 drives the synchronous belt 5 to move, and then the synchronous pulley 4 drives the polishing wheel 2 to rotate.

[0044] A synchronous belt hole is arranged at the top of the base 1, so that the synchronous belt 5 passes through the synchronous belt hole and is tensioned on the output end of the servo motor 12. A bottom plate 14 is arranged at the bottom of the base 1, and a handle 15 is arranged on the bottom plate 14. An operator can lift the handle 15 to complete the overall movement of the small-diameter component polishing device described in the embodiment of the present invention.

[0045] When using the polishing wheel 2 to process an optical element, there is the following formula:

[0046]

[0047] Among them, L represents the chord length of the interference range of the polishing wheel 2, R represents the curvature radius of the optical element, and H is a parameter related to the structural interference point. Different structural interference points correspond to different H values.

[0048] The processing process of the traditional polishing device is as Figure 4 shown. At the end of the driving shaft 3 on the polishing wheel 2 in the traditional polishing device, a bearing seat 10 and a synchronous pulley 4 are connected, and the bearing seat 10 is close to the polishing wheel 2. Through Figure 4 It can be clearly seen that when the traditional polishing device is used to process the optical element 16, obvious interference occurs between the bearing seat 10 and the optical element 16.

[0049] When the traditional polishing device is used to process the optical element 16, taking Figure 5 as an example, it is necessary to make a segmented judgment to determine whether it can be processed:

[0050] It can be judged by calculating the curvature radius according to the aperture, or by calculating the aperture according to the curvature radius. Here, an example of calculating the curvature radius according to the aperture will be used for explanation.

[0051] First, judge the aperture. If the aperture is smaller than the minimum chord length L min , Figure 5 the minimum chord length L in (a) min value, that is, 35.7 mm, and at this time it cannot be processed;

[0052] If the aperture L is within the range of Figure 5 (a) and Figure 5 (b), that is, within the range of [L min1 , L max1 , that is, within the range of [35.7 mm, 48.19 mm], at this time, the parameter H value of 18 is substituted into the above formula to calculate the curvature radius R. If the curvature radius R is within the range of Figure 5 (a) and Figure 5 (b), that is, within the range of [R min1 , R max1 , that is, between [43.1 mm, 64.5 mm], it can be processed at this time;

[0053] If the aperture L value is within the range of Figure 5 (b) and Figure 5 (c), that is, within the range of [L min2 , L max2 , that is, between [48.19 mm, 57.1 mm], at this time, the parameter H value of 22.3 is substituted into the above formula to calculate the curvature radius R. If the curvature radius R is within the range of Figure 5 (b) and Figure 5 (c), that is, within the range of [R min2 , R max2within, that is, between [64.5mm, 80.3mm], and machining can be performed at this time;

[0054] If the value of the aperture L is greater than the maximum chord length L max2 , and the radius of curvature R is greater than the maximum radius of curvature R max2 , machining can be performed in both cases.

[0055] When using the small-aperture element polishing device described in the embodiment of the present invention to machine the optical element 16, as Figure 6 shown, it can be clearly seen that the interference region between the optical element 16 and the small-aperture element polishing device described in the embodiment of the present invention disappears.

[0056] When using the small-aperture element polishing device described in the embodiment of the present invention to machine the optical element 16, taking Figure 7 as an example, the process of determining whether machining can be performed is as follows:

[0057] If the aperture is smaller than the minimum chord length L min , as Figure 7 shown in (a), the aperture is smaller than the minimum chord length L min = 21.46mm, then machining cannot be performed;

[0058] If the aperture is within the range of the chord length L [L min , L max , as Figure 7 shown in (b), the aperture is within the range of the chord length L [21.46, 39.99]. Set the parameter H to 14.68 and substitute it into the above formula to obtain the radius of curvature R. If the radius of curvature R is within the range of the radius of curvature R corresponding to the chord length L [R min , R max , as Figure 7 shown in (b), the radius of curvature R is within the range [28.72, 54.46], then machining can be performed;

[0059] If the aperture is greater than the maximum chord length L max , and the radius of curvature R is greater than the maximum radius of curvature R max when, machining can be performed.

[0060] Figure 8 and Figure 9 respectively show the machining interference range diagrams of the traditional polishing device and the small-aperture element polishing device described in the embodiment of the present invention. Figure 8 and Figure 9 In, the abscissa represents the aperture of the optical element 16, the arc radius represents the radius of curvature of the optical element 16, and the red area represents the machining range of the polishing wheel 2 during the machining process. By comparing Figure 8 and Figure 9It can be seen that the processing range of the small-diameter component polishing device described in the embodiment of the present utility model is significantly larger than that of the traditional polishing device.

[0061] Figure 10 and Figure 11 respectively show the removal functions of the polishing wheel 2 of the traditional polishing device and the small-diameter component polishing device described in the embodiment of the present utility model. Figure 10 and Figure 11 It can be clearly reflected from the parameters of the traditional polishing device and the small-diameter component polishing device described in the embodiment of the present utility model, including RMS (surface form accuracy, reflecting the processing capabilities of the two processing devices), Size X and Size Y (representing the length and width dimensions in the figure respectively, equivalent to the processing range). The smaller the RMS value, the higher the polishing accuracy, and the closer the numerical ratio of sizeX and sizeY is to 1:1, the better. Figure 10 The RMS in Figure 11 is 1.192λ (λ represents the wavelength of the laser emitted by the instrument for detecting the removal function), while the RMS in Figure 10 is 1.035λ. It can be seen from this that the small-diameter component polishing device described in the embodiment of the present utility model is superior to the traditional polishing device in terms of the RMS index in terms of processing capabilities. Figure 11 The Size X and Size Y in

[0062] are 7.6 mm and 3.8 mm respectively, and the Size X and Size Y in are 6.8 mm and 3.2 mm respectively. It can be seen from this that the numerical ratio of Size X and Size Y of the small-diameter component polishing device described in the embodiment of the present utility model is closer to 1:1, which is superior to the traditional polishing device. The above specific implementation manners do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A small-diameter component polishing device, characterized in that: It includes a base and a polishing structure arranged on the base; wherein the polishing structure includes a polishing wheel, a synchronization structure and a support seat; the support seat is arranged on the base; both ends of the polishing wheel are arranged on the support seat; the synchronization structure is located between the polishing wheel and the support seat and is connected to the polishing wheel, and the other end of the synchronization structure extends into the base, so that the synchronization structure drives the polishing wheel to rotate.

2. The small-diameter component polishing device according to claim 1, characterized in that: A driving shaft is provided on one side of the polishing wheel, and the end of the driving shaft is connected to the supporting seat; the synchronous structure is connected to the driving shaft.

3. The small-diameter component polishing device according to claim 2, characterized in that: The synchronous structure includes a synchronous pulley and a synchronous belt tensioned on the synchronous pulley; wherein the synchronous pulley is coaxially connected to the drive shaft, and the synchronous belt extends into the interior of the base, so that the synchronous belt drives the synchronous pulley to rotate, and then the synchronous pulley drives the polishing wheel to rotate.

4. The small-diameter component polishing device according to claim 3 is characterized in that: A polishing end cover is provided on the other side of the polishing wheel, a fixed shaft is provided on the connecting side of the polishing end cover, the polishing wheel is coaxially connected to the fixed shaft, and a gap is left between the polishing wheel and the polishing end cover; the fixed side of the polishing end cover is connected to the support seat.

5. The small-diameter component polishing device according to claim 4, characterized in that: The support seat includes a first support frame, a second support frame and a support connecting member; wherein, the bottom of the first support frame is fixed on the base; the top of the first support frame is connected to the fixed side of the polishing end cover; the bottom of the second support frame is arranged on the base through the support connecting member, and a bearing seat is provided on the top of the second support frame, and the end of the drive shaft is connected to the bearing seat through a bearing.

6. The small-diameter component polishing device according to claim 5, characterized in that: The width of the bearing is 3-4 mm.

7. The small-diameter component polishing device according to claim 3, characterized in that: A servo motor is arranged inside the base; and the synchronous belt is tensioned on the output end of the servo motor.

8. The small-diameter component polishing device according to claim 7, characterized in that: The interface of the servo motor extends to the outside of the base; a synchronous belt hole is provided on the top of the base, and the synchronous belt passes through the synchronous belt hole.

9. The small-diameter component polishing device according to claim 1, characterized in that: A bottom plate is provided at the bottom of the base, and a handle is provided on the bottom plate.

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