A method for adjusting parallelism of a double guide rail

Abstract

The application provides a double-guide-rail full-stroke inner parallelism error assembling and adjusting method, which utilizes a dial gauge, an inner focusing telescope and a mirror frame scale plate tooling to construct a debugging platform to complete high-precision assembling and adjusting of double-guide-rail full-stroke inner parallelism error. The double-guide-rail full-stroke inner parallelism error assembling and adjusting method provided by the application realizes high-precision assembling and adjusting of double-guide-rail full-stroke inner parallelism error, improves work efficiency under the premise of ensuring product precision, reduces assembly cost, and has a wide application prospect in the field of airborne photoelectric double-guide-rail system assembling and adjusting. The application is mature in technology and easy to operate, and can be widely applied to assembling and adjusting of guide rail components.

Description

Technical Field

[0001] This invention belongs to the field of optical assembly and adjustment technology, specifically relating to an assembly and adjustment method for parallelism difference within the full stroke of dual guide rails. Background Technology

[0002] In airborne optoelectronic systems, dual guide rails are a common method for radial or axial movement of mirror assemblies. Dual guide rail components are beneficial for improving the repeatability and imaging quality of optical systems. This technology can be widely used in the high-precision assembly and adjustment of dual guide rails in airborne optoelectronic systems and has broad application prospects. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a method for assembling and adjusting the parallelism difference within the full stroke of a dual-rail system. This method utilizes a dial indicator, an internal focusing telescope, and a tooling system with a reticle frame to construct an adjustment platform for achieving high-precision assembly and adjustment of the parallelism difference within the full stroke of the dual-rail system.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for adjusting the parallelism difference of dual guide rails throughout their full stroke, the method comprising the following steps:

[0005] S1: Adjust the flatness of the mounting reference surfaces of the two guide rails;

[0006] S2: Mount the two sliders on the mounting reference surfaces of the two guide rails respectively, so that the height difference between the upper surfaces of the two sliders is ≤0.015mm;

[0007] S3: A framed reticle fixture designed to adjust the parallelism difference between two sliders;

[0008] S4: After installing the reticle fixture with a frame on the slider, adjust the angles of the two guide rail mounting end faces and the housing mounting reference surface respectively by using the internal focusing telescope and the reticle fixture with a frame to ensure the parallelism of the upper surface of the slider during the movement.

[0009] S5: Rotate the reticle fixture with frame 90° and then adjust the internal focusing telescope so that the autocollimation image of the reticle fixture with frame is aligned with the internal focusing telescope.

[0010] S6: Adjust the parallelism difference between the upper surfaces of the two sliders during the movement.

[0011] The method for adjusting the parallelism difference of the dual guide rails throughout their full stroke provided by this invention also has the following feature: Step S1 includes the following steps:

[0012] S1.1: Grind the mounting reference surfaces of the two guide rails separately, and use a dial indicator to check the flatness of the mounting reference surfaces of the two guide rails within 0.005mm.

[0013] S1.2: After the dial indicator head contacts the mounting reference surface to zero, mark the dial indicator in a straight line from front to back along the mounting surface. If any local high points are found, repair and refining should be carried out.

[0014] S1.3: Repeatedly measure and refine until the flatness of the mounting reference surface of the two guide rails is ≤0.005mm.

[0015] The method for adjusting the parallelism difference of the dual guide rails throughout the entire stroke provided by the present invention also has the following feature: S2 further includes judging whether the guide rail slider is stuck on the guide rail.

[0016] The parallelism adjustment method for the dual guide rails throughout their full stroke provided by this invention also has the following characteristics: the reticle area of ​​the frame-mounted reticle fixture in S3 only reflects light from the crosshairs; the outer diameter of the reticle matches the mounting hole of the frame and is bonded with black silicone; the coincidence error between the center of the crosshairs of the reticle and the center of the axis of the frame fitting hole is ≤φ0.03mm; the frame-mounted reticle fixture is connected to the hole on the guide rail slider and can be rotated 90° before connection.

[0017] The method for adjusting the parallelism difference of the dual guide rails throughout the entire stroke provided by the present invention also has the following feature: the single-sided fitting gap between the outer diameter of the reticle and the mounting hole of the mirror frame is no more than 0.5mm.

[0018] The parallelism adjustment method for the entire stroke of the dual guide rails provided by the present invention also has the following feature: the internal focusing telescope in S4 is placed directly in front of the tool with the reticle frame.

[0019] The method for adjusting the parallelism difference of the dual guide rails throughout the entire stroke provided by the present invention also has the following feature: in step S4, the angle between the lower mounting end faces of the two guide rails and the mounting reference surface of the housing is adjusted by adjusting the connecting screws and adjusting shims of the lower mounting end faces of the guide rails and the mounting reference surface of the housing.

[0020] The parallelism adjustment method for the dual-rail full-stroke provided by this invention also has the following characteristics: in S4, the center of the reticle image and the autocollimation image of the crosshair coincide with the center of the reference crosshair of the internal focusing telescope itself. The collimation error between the autocollimation image and the internal focusing telescope is ≤5″, and the coincidence error between the center of the reticle image and the center of the internal focusing telescope is ≤ф0.03mm, thus ensuring the parallelism of the upper surface of the slider during the movement.

[0021] The parallelism adjustment method for the dual-rail full-stroke provided by this invention also has the following feature: In step S6, after rotating the two reticle fixtures with frames and the inner focusing telescope by 90°, the autocollimation image of the guide rail and the autocollimation of the inner focusing optical tube closer to the inner focusing telescope are adjusted, keeping their corresponding reticle fixtures with frames and the inner focusing telescope unchanged. The autocollimation image of the reticle fixture with frames on the guide rail away from the inner focusing telescope is observed through the inner focusing telescope to see if it is autocollimated with the inner focusing telescope. The collimation error between the autocollimation image and the inner focusing telescope is required to be ≤5″. If this is not met, the parallelism of the guide rail slider side is adjusted by adjusting the angle between the lower mounting end face of the slider and the mounting reference surface until the collimation error between the two reticle fixtures with frames and the inner focusing telescope is ≤5″. Then, the upper surfaces of the two sliders are parallel during the movement.

[0022] The parallelism difference adjustment method for the dual guide rails throughout the entire stroke provided by the present invention also has the following feature: in step S6, the parallelism judgment of the upper surfaces of the two sliders is performed at multiple monitoring points during the movement process, and the multiple monitoring points are at least five.

[0023] Beneficial effects

[0024] The parallelism adjustment method for dual guide rails throughout their entire stroke provided by this invention achieves high-precision adjustment of the parallelism difference across the entire stroke of the dual guide rails. While ensuring product accuracy, it improves work efficiency and reduces assembly costs, and has broad application prospects in the field of airborne optoelectronic dual guide rail system assembly and adjustment. This invention is technically mature, easy to operate, and can be widely applied to the assembly and adjustment of guide rail components. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an installation diagram illustrating the method for adjusting the parallelism difference of dual guide rails throughout their full stroke, as provided in an embodiment of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0029] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this invention based on the specific circumstances.

[0031] like Figure 1 As shown, this embodiment provides a method for adjusting the parallelism difference of dual guide rails throughout their entire stroke. The method includes the following steps:

[0032] S1: Adjust the flatness of the mounting reference surfaces of the two guide rails 3;

[0033] S2: Mount the two sliders on the mounting reference surfaces of the two guide rails 3 respectively, so that the height difference between the upper surfaces of the two sliders is ≤0.015mm;

[0034] S3: A framed reticle fixture 4 designed to adjust the parallelism difference between two sliders;

[0035] S4: After installing the reticle fixture 4 with a frame on the slider, adjust the angles of the lower mounting end faces of the two guide rails 3 and the mounting reference surface of the housing 2 respectively by using the internal focusing telescope 1 and the reticle fixture 4 with a frame to ensure that the upper surface of the slider is parallel during the movement.

[0036] S5: Rotate the reticle fixture 4 with the frame 90° and then adjust the internal focusing telescope 1 so that the autocollimated image of the reticle fixture 4 with the frame 90° is aligned with the internal focusing telescope 1.

[0037] S6: Adjust the parallelism difference between the upper surfaces of the two sliders during the movement.

[0038] In some embodiments, step S1 includes the following steps:

[0039] S1.1: Grind the mounting reference surfaces of the two guide rails 3 separately, and use a dial indicator to check the flatness of the mounting reference surfaces of the two guide rails 3 within 0.005mm.

[0040] S1.2: After the dial indicator head contacts the mounting reference surface to zero, dial the indicator in a straight line from front to back along the mounting surface. If any local high points are found, they should be repaired; use a grinding platform or fine sandpaper for repair.

[0041] S1.3: Repeatedly measure and refine until the flatness of the mounting reference surface of the two guide rails 3 is ≤0.005mm.

[0042] In some embodiments, S2 further includes determining whether the guide rail slider is stuck on the guide rail 3. To ensure that the guide rail slider runs smoothly and without jamming throughout the entire process on the guide rail 3, the specific steps of S2 are as follows: Install the two guide rails 3 onto the mounting reference surface of the housing 2 respectively, and use a dial indicator to check the upper surface of the two guide rail sliders to ensure that the upper surfaces of the two guide rail sliders are at the same height throughout the entire stroke, and that the entire operation is smooth and without jamming. The height difference between the upper surfaces of the two guide rail sliders should be ≤0.015mm. If this is not met, the lower mounting end face of the guide rail is ground with a grinding platform or fine sandpaper, and the process is repeated until the height difference between the upper surfaces of the two guide rail sliders is ≤0.015mm.

[0043] In some embodiments, the reticle area of ​​the framed reticle fixture 4 in S3 only reflects light from the crosshairs. The outer diameter of the reticle matches the mounting hole in the frame and is bonded with black silicone. The overlap error between the center of the crosshairs of the reticle and the center of the axis of the mounting hole in the frame is ≤φ0.03mm. The framed reticle fixture 4 is connected to the hole on the guide rail slider and can be rotated 90° before connection. The framed reticle fixture 4 consists of two fixtures with identical shape and dimensions.

[0044] In some embodiments, the clearance between the outer diameter of the reticle and the mounting hole of the mirror frame on one side is no greater than 0.5 mm.

[0045] In some embodiments, the internal focusing telescope 1 in S4 is placed directly in front of the reticle tooling 4 with a frame.

[0046] In some embodiments, in step S4, the angle between the lower mounting end faces of the guide rails 3 and the mounting reference surface of the housing 2 is adjusted by adjusting the connecting screws and adjusting shims of the lower mounting end faces of the guide rails 3 and the mounting reference surface of the housing 2.

[0047] In some embodiments, the center of the reticle image and the autocollimation image of the crosshair in S4 coincide with the center of the reference crosshair of the internal focusing telescope 1 itself. The collimation error between the autocollimation image and the internal focusing telescope 1 is ≤5″, and the coincidence error between the center of the reticle image and the center of the internal focusing telescope 1 is ≤ф0.03mm, thus ensuring the parallelism of the upper surface of the slider during the movement.

[0048] In some embodiments, S5 includes: placing the housing 2 with dual guide rails on an optical platform, rotating the reticle fixture 4 with a frame 90° on the guide rail slider and connecting it, placing the inner focusing telescope 1 at a position where its own optical axis is perpendicular to the two reticle fixtures with frames 4, so that the inner focusing telescope 1 emits parallel light, and using the reticle fixture 4 closest to the inner focusing telescope 1 as a reference, adjusting the inner focusing telescope 1 so that the autocollimation image of the reticle fixture 4 with the frame 4 is collimated with the inner focusing telescope 1, and the collimation error between the autocollimation image and the inner focusing telescope 1 is ≤5″.

[0049] In some embodiments, step S6 includes rotating the two reticle fixtures 4 with frames and the inner focusing telescope 1 by 90°, adjusting the autocollimation of the guide rail 3 near the inner focusing telescope 1 and the autocollimation of the inner focusing optical tube, keeping the corresponding reticle fixtures 4 with frames and the inner focusing telescope 1 unchanged, and observing through the inner focusing telescope 1 whether the autocollimation of the reticle fixture 4 on the guide rail 3 away from the inner focusing telescope 1 is autocollimated with the inner focusing telescope 1. The collimation error between the autocollimation image and the inner focusing telescope is required to be ≤5″. If this is not met, the parallelism of the guide rail slider side is adjusted by adjusting the angle between the lower mounting end face of the slider and the mounting reference surface until the collimation error between the two reticle fixtures 4 with frames and the inner focusing telescope 1 is ≤5″. This ensures that the upper surfaces of the two sliders are parallel during the movement.

[0050] In some embodiments, the parallelism determination of the upper surfaces of the two sliders in step S6 is performed at multiple monitoring points during the movement process, and the multiple monitoring points are at least five. The multiple monitoring points can be the starting point, the 1 / 4 point of the stroke, the 1 / 2 point of the stroke, the 3 / 4 point of the stroke, and the ending point.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A method of adjusting a parallelism error of a double-rail full stroke inside, characterized in that, The method comprises the following steps: S1: adjusting the flatness of the mounting reference surface of the two guide rails; S2: mounting the two sliders on the mounting reference surface of the two guide rails respectively, so that the height difference of the upper surfaces of the two sliders is ≤0.015mm; S3: designing a mirror frame division plate tool for adjusting the parallel difference between the two sliders; S4: after the mirror frame division plate tool is mounted on the slider, the angle of the lower mounting end surface of the two guide rails and the mounting reference surface of the shell is adjusted through the internal focusing telescope and the mirror frame division plate tool respectively, so as to ensure the parallelism of the upper surface of the slider during movement; S5: after the mirror frame division plate tool is rotated by 90°, the internal focusing telescope is adjusted, so that the self-collimation image of the mirror frame division plate tool is collimated with the internal focusing telescope; S6: adjusting the parallel difference of the upper surfaces of the two sliders during movement, The division plate region of the mirror frame division plate tool in S3 only has cross line reflected light, the outer diameter of the division plate and the mirror frame mounting hole are adapted and bonded with black silicone, the center of the cross of the division plate coincides with the axis center of the mirror frame fitting hole with an error ≤φ0.03mm, the mirror frame division plate tool is connected with the hole on the guide rail slider and can be rotated by 90° after connection, S6 comprises rotating the two mirror frame division plate tools and the internal focusing telescope by 90°, adjusting the guide rail self-collimation image close to the internal focusing telescope and the internal focusing tube self-collimation, keeping the corresponding mirror frame division plate tool and internal focusing telescope unchanged, observing whether the self-collimation image of the mirror frame division plate tool on the guide rail far from the internal focusing telescope is collimated with the internal focusing telescope through the internal focusing telescope, and requiring that the collimation error of the self-collimation image and the internal focusing telescope is ≤5″, if not, adjusting the angle of the lower mounting end surface of the guide rail and the mounting reference surface of the shell to adjust the parallelism of the side surface of the guide rail slider, until the collimation error of the self-collimation image of the two mirror frame division plate tools and the internal focusing telescope is ≤5″, which is the parallelism of the upper surfaces of the two sliders during movement.

2. The method of aligning dual-rail full-stroke parallelism error of claim 1, wherein, S1 comprises the following steps: S1.1: grinding the mounting reference surface of each of the two guide rails, and using a dial gauge straight line detection method to ensure that the flatness of the mounting reference surface of each of the two guide rails is within 0.005mm; S1.2: after the dial gauge head contacts the mounting reference surface and is set to zero, the mounting reference surface is straightly detected from front to back, and after a local high point is found, grinding treatment is performed; S1.3: repeatedly measuring and grinding until the flatness of the mounting reference surface of the two guide rails is ≤0.005mm.

3. The method of aligning dual-rail full-stroke parallelism error of claim 1, wherein, S2 further comprises judging whether the guide rail slider is stuck on the guide rail.

4. The dual-rail full-stroke internal parallelism adjustment method of claim 1, wherein, The single-sided fitting gap between the outer diameter of the division plate and the mirror frame mounting hole is not greater than 0.5mm.

5. The dual-rail full-stroke internal parallelism adjustment method of claim 1, wherein, The internal focusing telescope in S4 is placed in front of the mirror frame division plate tool.

6. The dual-rail full-stroke internal parallelism adjustment method of claim 1, wherein, In S4, the angle of the lower mounting end surface of the two guide rails and the mounting reference surface of the shell is adjusted by adjusting the connecting screws and adjusting shims of the lower mounting end surface of the two guide rails and the mounting reference surface of the shell. In S4, the angle of the lower mounting end surface of the two guide rails and the mounting reference surface of the shell is adjusted by adjusting the connecting screws and adjusting shims of the lower mounting end surface of the two guide rails and the mounting reference surface of the shell.

7. The dual-rail full-stroke internal parallelism adjustment method of claim 1, wherein, The crosshair center of the crosshair scale in the S4 coincides with the center of the reference crosshair of the inner focusing telescope, the autocollimation error of the autocollimation image is less than or equal to 5", the error of the center of the scale image of the scale plate coinciding with the center of the inner focusing telescope is less than or equal to ф0.03mm, and thus the parallelism of the upper surface of the slide during movement is ensured.

8. The dual-rail full-stroke internal parallelism adjustment method of claim 1, wherein, The parallelism of the upper surfaces of the two slides is determined at a plurality of monitoring points during movement in the S6, and the plurality of monitoring points are at least five.

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