Prism assembly assembling device with angle adjusting function and angle adjusting method of prism assembly

Abstract

The objective of the invention is to solve the technical problems in the prior art that the adjustment process is time-consuming and labor-consuming, the adjustment efficiency and the quality of an optical prism mainly depend on the experience of an operator, the requirement of engineering batch production is difficult to adapt, and the alignment cycle cannot be effectively controlled. The invention provides a prism assembly assembling device with an angle adjusting function and an angle adjusting method of a prism assembly. The device comprises an assembly table body and an installation face, the installation face is arranged on the front face of the assembly table body, an installation boss is arranged below the installation face, a plurality of through holes are formed in the installation boss in the vertical direction, threaded bushings are installed in the through holes, and fine thread adjusting screws are connected into the threaded bushings. A plurality of threaded holes communicated with the through holes are formed in the mounting boss, and a jackscrew is connected in each threaded hole; the device does not influence the stability of the optical prism in the prism assembly, does not depend on the experience and hand feeling of an operator during adjustment, and is high in adjustment precision and short in adjustment time consumption.

Description

Technical Field

[0001] This invention relates to an optical component assembly apparatus, specifically to a prism component assembly apparatus with angle adjustment function and a prism component angle adjustment method. Background Technology

[0002] Prism assemblies are fundamental components for optical aiming in inertial navigation products. They must be tested and calibrated before leaving the factory, and the relevant parameters will be used for guidance compensation. Therefore, the initial installation accuracy of prism assemblies directly affects the initial guidance accuracy of the system.

[0003] Currently, the initial optical reference calibration of prism assemblies in inertial navigation products generally involves two operators working in a collaborative manner after assembling the prism assembly onto the corresponding stage: the first operator uses a theodolite for initial alignment to determine the angular deviation and then informs the second operator of the required angular compensation trend; the second operator uses a copper support rod to gently tap the left or right side of the prism assembly's outer surface to achieve a slight rotation; the first operator observes the degree of overlap between the optical crosshair in the theodolite's field of view and the crosshair of the theodolite's optical lens to determine the initial installation angle error of the prism assembly; the two operators work together, repeating this process until the optical crosshair and the crosshair of the theodolite's optical lens are aligned. However, this method still has significant drawbacks: ① The accuracy of angle adjustment depends heavily on the operator's experience and feel. The control of the striking force directly affects the rotation angle of the prism assembly, which is highly subjective. ② When the initial installation angle error is close to the required target value, the deviation in feel can easily cause the angle to exceed the tolerance in the opposite direction, so it is necessary to perform repeated adjustments in both directions until the initial installation angle meets the requirements, which is inefficient. ③ Each tap on the side wall of the prism assembly during the calibration process is an instantaneous impact on the optical prism in the prism assembly, which will have an unpredictable effect on the stability of the optical prism. In summary, the calibration process of this method is time-consuming and labor-intensive. Experience determines the efficiency of calibration and the quality of optical prisms, making it difficult to adapt to the needs of mass production in engineering, resulting in the inability to effectively control the production cycle. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of existing technology where the calibration process is time-consuming and labor-intensive, the calibration efficiency and the quality of the optical prism mainly depend on the operator's experience, which is difficult to adapt to the needs of mass production in engineering, resulting in the inability to effectively control the production cycle. The invention provides a prism assembly device with angle adjustment function and an angle adjustment method for prism assembly.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows: A prism assembly device with angle adjustment function includes an assembly platform with a mounting surface for mounting the prism assembly; its special feature is that: The mounting surface is located on the front of the assembly platform, and an adjustment module is provided on the assembly platform below the mounting surface. The adjustment module includes a mounting boss, a threaded bushing, a fine-pitch adjusting screw, and a set screw. The mounting boss is located on the assembly platform below the mounting surface and has multiple through holes along the vertical direction. A threaded bushing is installed in each through hole, and the size of the threaded bushing is adapted to the through hole. A fine-pitch adjusting screw is threaded into each threaded bushing. The mounting boss has multiple threaded holes that communicate with the multiple through holes. A set screw is installed in each threaded hole and is used to limit the position of the threaded bushing.

[0006] Furthermore, there are two through holes, and the mounting boss includes a first boss and a second boss. The first boss and the second boss are symmetrical about each other with respect to the midline of the mounting surface, and each of the first boss and the second boss has a through hole in the vertical direction.

[0007] Furthermore, there are two through holes, and the mounting boss is a rectangular boss with two through holes formed along the vertical direction. The two through holes are symmetrical to each other with respect to the center line of the mounting surface.

[0008] Furthermore, the thickness of the mounting boss in the vertical direction is 5mm to 6mm.

[0009] Furthermore, the threaded bushing includes a bushing body and a retaining ring, the retaining ring being connected to one end of the bushing body and having an outer diameter larger than the outer diameter of the bushing body; the outer diameter of the bushing body is adapted to the inner diameter of the through hole, and the two are in clearance fit.

[0010] Furthermore, the threaded bushing is made of copper or stainless steel.

[0011] Furthermore, the threads of the threaded bushing and the fine-pitch adjusting screw are M3 or M4 series threads.

[0012] Meanwhile, the present invention also provides an angle adjustment method for a prism assembly, based on the aforementioned prism assembly device with angle adjustment function; its special feature is that it includes the following steps: S1. Pre-install the prism assembly onto the mounting surface, use a theodolite to calibrate the angle of the prism in the prism assembly, rotate the prism assembly until the angle deviation of the prism is ≤1′, stop rotating the prism assembly, and then pre-tighten the mounting screws used to fix the prism assembly. S2. By observing the angle difference on the theodolite, counterclockwise is taken as positive and clockwise as negative to determine the direction of the angle deviation of the prism assembly relative to the standard scale line of the theodolite. S3. By rotating the fine-toothed adjusting screw at the position opposite to the direction of the angle deviation, observe the angle difference on the theodolite simultaneously until the angle difference is reduced to within the preset requirement range. S4. Once the angle difference drops to within the preset requirement range, tighten the mounting screws according to the upper threshold of the preset assembly torque.

[0013] Furthermore, step S1 specifically includes: S1.1. Assemble the prism assembly onto the mounting surface by pre-tightening the mounting screws. During the assembly process, stop pre-tightening immediately when the spring washer on the prism assembly is flattened. S1.2 Use a theodolite to initially calibrate the angle of the prism in the prism assembly, determine the initial prism angle deviation, and then manually rotate the prism assembly according to the initial angle deviation until the prism angle deviation is ≤1′, then stop rotating the prism assembly. S1.3 Tighten the mounting screws again to 70% ± 5% of the required assembly torque value.

[0014] Furthermore, step S3 specifically includes: Rotate the fine-toothed adjusting screw at the position opposite to the direction of the angle deviation multiple times, rotating it 1 / 4 turn each time while simultaneously observing the angle difference on the theodolite, until the angle difference is reduced to within the preset required range.

[0015] Compared with the prior art, the present invention has the following advantages: (1) The present invention provides a prism assembly device with angle adjustment function. The structure is simple and easy to disassemble and assemble. The device is designed with an adjustment module that is rigidly connected by an installation boss, a threaded bushing, a fine-tooth adjusting screw and a set screw. The installation angle of the assembled prism assembly is adjusted by rotating the fine-tooth adjusting screw at different positions. This does not affect the stability of the optical prism in the prism assembly. Moreover, the adjustment does not depend on the operator's experience and feel. The adjustment accuracy is high and the adjustment time is short. (2) The present invention provides a prism assembly device with angle adjustment function, which directly opens a through hole on the mounting boss. The threaded bushing, fine-pitch adjusting screw and set screw are detachably connected in the through hole. This avoids the practical disadvantage of poor machinability of machining the precision thread for connection with the fine-pitch adjusting screw directly in the through hole. The set screw strengthens the rigid connection between the threaded bushing and the mounting boss, making the adjustment module more stable and reliable. (3) The present invention provides an angle adjustment method for a prism assembly. By rotating the fine-toothed adjusting screw at the opposite position of the angle deviation direction observed by the theodolite, the angle difference on the theodolite is observed simultaneously until the angle difference is reduced to within the preset requirement range. The operation method is simple, and there is no need for operators to perform periodic inspections. Moreover, on-site operators can operate it skillfully and accurately after simple explanation and learning. The adjustment effect is immediate and meets the needs of mass production in engineering. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of a prism assembly device with angle adjustment function according to the present invention (the set screw and fine-tooth adjustment screw are not shown). Figure 2 This is a front view schematic diagram of an embodiment of a prism assembly device with angle adjustment function according to the present invention; Figure 3 This is a schematic diagram of the adjustment module in an embodiment of a prism assembly device with angle adjustment function according to the present invention.

[0017] The attached figures are labeled as follows: 1-Assembly platform, 2-Prism assembly, 3-Mounting surface, 4-Mounting boss, 5-Threaded bushing, 6-Fine thread adjusting screw, 7-Setting screw. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1 See appendix Figure 1As shown, this embodiment provides a prism assembly device with angle adjustment function, including an assembly platform 1. The assembly platform 1 has a mounting surface 3 for mounting a prism assembly 2. The mounting surface 3 is located on the front of the assembly platform 1. A mounting boss 4 is provided on the assembly platform 1, below the mounting surface 3. The mounting boss 4 includes a first boss and a second boss, both with a thickness of 5mm. The first boss and the second boss are symmetrical about each other with respect to the midline of the mounting surface 3. Each of the first boss and the second boss has a through hole in the vertical direction, with a clearance fit within the through hole. A threaded bushing 5 is provided, with a clearance of 0.01 mm between the threaded bushing 5 and the through hole. The threaded bushing 5 is made of copper and includes a bushing body and a retaining ring. The retaining ring is connected to one end of the bushing body and its outer diameter is larger than that of the bushing body. A threaded hole communicating with the through hole is provided on both the first boss and the second boss. The threaded hole is arranged along the direction perpendicular to the hole axis of the through hole and is threadedly connected to the set screw 7. A fine-pitch adjusting screw 6 is internally threaded to the threaded bushing 5, and the threads of the threaded bushing 5 and the fine-pitch adjusting screw 6 are M3 series threads.

[0020] Based on the above-mentioned prism assembly device with angle adjustment function, this embodiment provides an angle adjustment method for a prism assembly, including the following steps: S1. By pre-tightening the mounting screws, pre-install the prism assembly 2 onto the mounting surface 3. During the assembly process, stop pre-tightening when the spring washer on the prism assembly 2 is just flattened by the mounting screws. Then install the fine-pitch adjusting screw 6 until the ball head of the fine-pitch adjusting screw 6 protrudes from the end face of the mounting boss 4. When the gap between the ball head and the side of the prism assembly 2 is visually measured to be 0.5mm to 1mm, stop tightening the fine-pitch adjusting screw 6. S2. Use a theodolite to initially calibrate the angle of the prism in the prism assembly 2, determine the initial prism angle deviation, and then manually rotate the prism assembly 2 according to the initial angle deviation until the prism angle deviation is ≤1′, then stop rotating the prism assembly 2. S3. Tighten the mounting screws again to 75% of their required assembly torque value; S4. By observing the angle difference on the theodolite, with counterclockwise as positive and clockwise as negative, determine the direction of the angle deviation of the prism assembly 2 relative to the standard scale line of the theodolite. S5. Rotate the fine-toothed adjusting screw 6 at the position opposite to the direction of the angle deviation multiple times, rotating it 1 / 4 turn each time and observing the angle difference on the theodolite simultaneously, until the angle difference is reduced to within the preset required range. S6. Once the angle difference drops to within the preset requirement range, tighten the mounting screws according to the upper threshold of the preset assembly torque.

[0021] Example 2 This embodiment provides a prism assembly device with angle adjustment function, including an assembly platform 1. The assembly platform 1 has a mounting surface 3 for mounting a prism assembly 2. The mounting surface 3 is located on the front of the assembly platform 1. A mounting boss 4 is located on the upper part of the assembly platform 1, below the mounting surface 3. The mounting boss 4 is a rectangular boss with a thickness of 6mm. Two through holes are formed vertically on the rectangular boss. The two through holes are symmetrical with respect to the center line of the mounting surface 3. Threaded bushings 5 ​​are fitted into the through holes with clearance. The gap between the bushing 5 and the through hole is 0.02mm. The threaded bushing 5 is made of stainless steel and includes a bushing body and a retaining ring. The retaining ring is connected to one end of the bushing body and the outer diameter of the retaining ring is larger than the outer diameter of the bushing body. Two threaded holes are provided on the rectangular boss, which are respectively connected to the two through holes. The threaded holes are arranged along the hole axis perpendicular to the through holes and are threadedly connected to the set screw 7. The threaded bushing 5 is internally threaded with a fine-pitch adjusting screw 6, and the threads of the threaded bushing 5 and the fine-pitch adjusting screw 6 are M3 series threads.

[0022] Based on the above-mentioned prism assembly device with angle adjustment function, this embodiment provides an angle adjustment method for a prism assembly, including the following steps: S1. By pre-tightening the mounting screws, pre-install the prism assembly 2 onto the mounting surface 3. During the assembly process, stop pre-tightening when the spring washer on the prism assembly 2 is just flattened by the mounting screws. Then, install the fine-pitch adjusting screw 6 until the ball head of the fine-pitch adjusting screw 6 protrudes from the end faces of the first boss and the second boss. When the gap between the ball head and the side of the prism assembly 2 is visually estimated to be 0.5mm to 1mm, stop turning the fine-pitch adjusting screw 6. S2. Use a theodolite to initially calibrate the angle of the prism in the prism assembly 2, determine the initial prism angle deviation, and then manually rotate the prism assembly 2 according to the initial angle deviation until the prism angle deviation is ≤1′, then stop rotating the prism assembly 2. S3. Tighten the mounting screws again to 65% of their required assembly torque value; S4. By observing the angle difference on the theodolite, with counterclockwise as positive and clockwise as negative, determine the direction of the angle deviation of the prism assembly 2 relative to the standard scale line of the theodolite. S5. Rotate the fine-toothed adjusting screw 6 at the position opposite to the direction of the angle deviation multiple times, rotating it 1 / 4 turn each time and observing the angle difference on the theodolite simultaneously, until the angle difference is reduced to within the preset required range. S6. Once the angle difference drops to within the preset requirement range, tighten the mounting screws according to the upper threshold of the preset assembly torque.

[0023] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the technical solutions of the present invention should be included within the scope of protection of the present invention. Furthermore, it should be noted that the accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the actual scope of protection claimed by the present invention.

Claims

1. A prism assembly assembling device with angle adjustment function, comprising an assembling table body (1), wherein an installation surface (3) for installing a prism assembly (2) is arranged on the assembling table body (1) ; characterized in that: the installation surface (3) is arranged on the front surface of the assembling table body (1), and an adjustment module is arranged on the assembling table body (1) below the installation surface (3) ; the adjustment module comprises a mounting boss (4), a threaded bushing (5), a fine tooth adjusting screw (6) and a jack (7) ; the mounting boss (4) is arranged on the assembling table body (1) below the installation surface (3), and a plurality of through holes are formed in the mounting boss (4) in the vertical direction; one threaded bushing (5) is arranged in each through hole, and the size of the threaded bushing (5) is matched with the size of the through hole; one fine tooth adjusting screw (6) is threadedly connected in each threaded bushing (5) ; a plurality of threaded holes are formed in the mounting boss (4) and communicated with the plurality of through holes respectively; and one jack (7) is arranged in each threaded hole, and the jack (7) is used for limiting the position of the threaded bushing (5). 2.The prism assembly assembling device with angle adjustment function according to claim 1, characterized in that: the through holes are two, the mounting boss (4) comprises a first boss and a second boss, the first boss and the second boss are symmetrical with respect to the center line of the installation surface (3), and one through hole is formed in the first boss and the second boss in the vertical direction respectively. 3.The prism assembly assembling device with angle adjustment function according to claim 1, characterized in that: the through holes are two, the mounting boss (4) is a rectangular boss, two through holes are formed in the rectangular boss in the vertical direction, and the two through holes are symmetrical with respect to the center line of the installation surface (3). 4.The prism assembly assembling device with angle adjustment function according to claim 2 or 3, characterized in that: the thickness of the mounting boss (4) in the vertical direction is 5mm-6mm. 5.The prism assembly assembling device with angle adjustment function according to claim 1, characterized in that: the threaded bushing (5) comprises a bushing body and a stop ring, the stop ring is connected to one end of the bushing body, and the outer diameter of the stop ring is larger than the outer diameter of the bushing body; the outer diameter of the bushing body is matched with the inner diameter of the through hole, and the two are gap-fitted. 6.The prism assembly assembling device with angle adjustment function according to claim 1, characterized in that: the threaded bushing (5) is made of copper or stainless steel. 7.The prism assembly assembling device with angle adjustment function according to claim 1, characterized in that: the threads of the threaded bushing (5) and the fine tooth adjusting screw (6) are M3 or M4 series threads. including the following steps:

8. A method for angle adjustment of a prism assembly, based on the prism assembly angle adjustment device according to any one of claims 1-7; characterized in that, S1, pre-assemble the prism assembly (2) on the installation surface (3), use the theodolite to calibrate the angle of the prism in the prism assembly (2), rotate the prism assembly (2) until the angle deviation of the prism is less than or equal to 1', stop rotating the prism assembly (2), and then pre-tighten the installation screw for fixing the prism assembly (2). ​ S2, by observing the angle difference value on the theodolite, taking counterclockwise as positive direction and clockwise as negative direction to judge the direction of the angle deviation of the prism assembly (2) relative to the standard scale line of the theodolite; S3, by rotating the fine tooth adjusting screw (6) at the position opposite to the direction of the angle deviation, synchronously observing the angle difference value on the theodolite until the angle difference value is within the preset requirement range; S4, when the angle difference value is within the preset requirement range, tightening the mounting screw according to the upper difference threshold of the preset assembly torque.

9. The method of angular alignment of a prism assembly of claim 8, wherein, Step S1 is specifically: S1.1, by pre-tightening the mounting screw, assembling the prism assembly (2) to the mounting surface (3), during the assembly process, when the spring washer on the prism assembly (2) is flattened, immediately stop pre-tightening; S1.2, using the theodolite to initially calibrate the angle of the prism in the prism assembly (2), determining the initial prism angle deviation, and then rotating the prism assembly (2) according to the initial angle deviation until the prism angle deviation is less than or equal to 1', then stop rotating the prism assembly (2); S1.3, tightening the mounting screw at 70%±5% of the assembly torque value, and then pre-tightening again.

10. The method of angular alignment of a prism assembly of claim 8, wherein, Step S3 is specifically: Rotating the fine tooth adjusting screw (6) at the position opposite to the direction of the angle deviation multiple times, each time rotating 1 / 4 turn and synchronously observing the angle difference value on the theodolite until the angle difference value is within the preset requirement range.

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