High-precision assembly process of three parallel guide rails

Abstract

The application discloses a high-precision assembly process of three parallel guide rails and belongs to the technical field of mechanical assembly, which comprises the following steps: installing a flat ruler; installing a second linear guide rail; adjusting the parallelism of the second linear guide rail relative to the flat ruler; adjusting the straightness of the second linear guide rail; installing a third linear guide rail and adjusting the parallelism of the third linear guide rail relative to the second linear guide rail; adjusting the straightness of the third linear guide rail; installing a first linear guide rail and adjusting the parallelism of the first linear guide rail relative to the second linear guide rail; and adjusting the straightness of the first linear guide rail. The application effectively guarantees the installation precision of the three parallel guide rails by using detecting devices such as a micrometer and a autocollimator and combining with special tooling.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical assembly, and in particular relates to a high-precision assembly process of three parallel guide rails. Background Art

[0002] Linear guides are widely used in linear motion components of machine tools, automated production equipment, medical equipment, precision measuring instruments and other structures. They are often used in conjunction with ball screws to perform reciprocating linear motion. They have the characteristics of high precision, high rigidity, low friction, long life, and easy installation and maintenance.

[0003] The number of linear guides selected for different usage scenarios should be determined based on the type, size, direction, point of action, and distribution of the external load. The more commonly used ones are single-rail, double-rail, and triple-rail structures. The single-rail structure is often used when the load is relatively small; the double-rail structure is suitable for situations where the load is relatively large or the eccentric load is relatively large, because the double-rail structure can withstand a certain bending moment; when the guide rails are installed on a horizontal surface, the load has a large span in the width direction of the slider, and the double-rail structure is difficult to meet the requirements of smooth operation of the mechanism and maintain a certain level of motion accuracy, a three-rail structure is required. Since the three-rail structure is an over-constrained structure, there are very strict requirements on the assembly accuracy of the three guide rails during the assembly process, otherwise the mechanism will have insufficient accuracy during service. The assembly process of the existing rolling guide assembly process does not have any process measures to guarantee the straightness of the guide rail itself. Currently, there is a lack of effective high-precision assembly process for three parallel guide rails. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A high-precision assembly process for three parallel guide rails includes the following steps:

[0006] S1, install the straightedge; place the straightedge on the marble mounting platform, align the straightedge with the straight line where the second linear guide rail mounting hole is located, and secure the straightedge;

[0007] S2, installing the second linear guide rail; aligning the mounting holes of the second linear guide rail with the second linear guide rail mounting holes on the marble mounting platform in sequence, and sequentially installing screws for fixing the second linear guide rail on the marble mounting platform, without pre-tightening the screws;

[0008] S3, adjusting the parallelism of the second linear guide rail relative to the straightedge; using a first detection device comprising a marble base and a micrometer to detect and adjust the parallelism between the second linear guide rail and the straightedge to within 0.01 mm;

[0009] S4, adjusting the straightness of the second linear guide rail so that the straightness of the second linear guide rail is within 10", and then tightening the screws used to fix the second linear guide rail;

[0010] S5, installing the third linear guide rail and adjusting the parallelism of the third linear guide rail relative to the second linear guide rail; temporarily not completely tightening the screws used to fix the third linear guide rail to the marble mounting platform;

[0011] S6, adjust the straightness of the third linear guide rail; ensure that the straightness of the third linear guide rail is within 10", and then tighten the screws used to fix the third linear guide rail;

[0012] S7, installing the first linear guide rail and adjusting the parallelism of the first linear guide rail relative to the second linear guide rail; temporarily not tightening the screws used to fix the first linear guide rail to the marble mounting platform;

[0013] S8, adjust the straightness of the first linear guide rail so that the straightness of the first linear guide rail is within 10", and finally tighten the screws used to fix the first linear guide rail.

[0014] The present invention has the following beneficial effects:

[0015] The present invention utilizes detection devices such as a micrometer and an autocollimator, combined with specially designed tooling, to effectively ensure the installation accuracy of the three parallel guide rails. Specifically, it includes:

[0016] (1) The present invention uses a standard measuring tool, a straightedge, as a reference to install the guide rail, and uses a micrometer to detect the parallelism of the guide rail relative to the straightedge, which can achieve higher installation accuracy.

[0017] (2) The present invention uses a special tool to adjust the straightness of the guide rail and combines it with an autocollimator for detection, which can effectively ensure the installation straightness of each guide rail.

[0018] (3) The guide rails on both sides of the present invention are installed based on the second linear guide rail installed first, which can effectively ensure the parallelism between the three guide rails. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart of the high-precision assembly process of three parallel guide rails of the present invention;

[0020] Figure 2Schematic diagram of the hole distribution of the marble mounting platform of the present invention, wherein 010 is the marble mounting platform, 0151 is the first linear guide rail mounting hole, 0152 is the second linear guide rail mounting hole, 0153 is the third linear guide rail mounting hole, 0161 is the first mounting hole of the first dedicated tooling, 0162 is the second mounting hole of the first dedicated tooling, 0163 is the third mounting hole of the first dedicated tooling, 0171 is the first mounting hole of the second dedicated tooling, 0172 is the second mounting hole of the second dedicated tooling, and 0173 is the third mounting hole of the second dedicated tooling;

[0021] Figure 3 Schematic diagram of adjusting the parallelism of the second linear guide rail relative to the straightedge in step S3 of the present invention, wherein 010 is a marble mounting platform, 011 is a slider on the second linear guide rail, 012 is a second linear guide rail, 013 is a straightedge, and 014 is a first detection device;

[0022] Figure 4 Schematic diagram of adjusting the straightness of the second linear guide rail in step S4 of the present invention, wherein 010 is a marble mounting platform, 011 is a slider on the second linear guide rail, 012 is a second linear guide rail, 020 is an autocollimator, 021 is a first dedicated tool, 022 is a second dedicated tool, and 023 is a plane reflector.

[0023] Figure 5 Schematic diagram of installing and adjusting the parallelism of the third linear guide relative to the second linear guide in step S5 of the present invention, wherein 010 is a marble mounting platform, 011 is a slider on the second linear guide, 012 is a second linear guide, 030 is a third linear guide, 031 is a slider on the third linear guide, and 032 is a second detection device;

[0024] Figure 6 A partially enlarged schematic diagram of the special tooling used to adjust the guide rail straightness of the present invention, wherein 010 is the marble mounting platform, 011 is the slider on the second linear guide rail, 012 is the second linear guide rail, 021 is the first special tooling, 022 is the second special tooling, 040 is the top screw hole, and 041 is the countersunk hole for fixing the tooling;

[0025] Figure 7 Schematic diagram of the parts drawing of the first special tool or the second special tool of the present invention, wherein 040 is a top screw hole, 041 is a countersunk hole for fixing the tool;

[0026] Figure 8Schematic diagram of installing and adjusting the parallelism of the first linear guide relative to the second linear guide in step S7 of the present invention, wherein 010 is a marble mounting platform, 011 is a slider on the second linear guide, 012 is a second linear guide, 032 is a second detection device, 051 is a first linear guide, and 052 is a slider on the first linear guide. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1 The high-precision assembly process of three parallel guide rails of the present invention includes:

[0030] S1, installation square 013; see Figure 2 、 Figure 3 First, place a straight ruler 013 on the marble mounting platform 010, adjust the position of the straight ruler 013 so that the straight ruler 013 is parallel to the straight line where the second linear guide rail mounting hole 0152 is located, and fix the straight ruler with glue.

[0031] S2, install the second linear guide rail 012; see Figure 2 、 Figure 3 , clean and wipe the second linear guide rail 012, make the horizontal installation reference surface of the second linear guide rail 012 close to the marble installation platform 010, and the vertical reference surface of the second linear guide rail 012 face the side of the straightedge 013, make the installation holes of the second linear guide rail 012 align with the corresponding second linear guide rail installation holes 0152 on the marble installation platform 010 in sequence, and install the screws used to fix the second linear guide rail 012 on the marble installation platform 010 in sequence, without pre-tightening the screws for the time being.

[0032] S3, adjust the parallelism of the second linear guide rail 012 relative to the straightedge 013; see Figure 3 The parallelism between the second linear guide rail 012 and the straightedge 013 is detected and adjusted using a first detection device 014 comprising a marble base and a micrometer. The screws securing the second linear guide rail 012 are not fully tightened until the vertical reference surface of the second linear guide rail 012 and the side surface of the straightedge 013 are within a specified value (0.01 mm). The marble base has a first reference surface and a second reference surface that are perpendicular to each other.

[0033] S4, adjust the straightness of the second linear guide rail 012; use the first special tool 021, the second special tool 022 and the autocollimator 020 in combination to adjust the straightness of the second linear guide rail to meet the requirements. Figure 2 、 Figure 4 、 Figure 6 and Figure 7 A plane reflector 023 is fixed on the slider 011 on the second linear guide rail. On both sides of the second linear guide rail 012 and on the marble mounting platform 010, screws are respectively screwed on the corresponding Figure 2 The first special tooling 021 and the second special tooling 022 are fixed at the second mounting hole 0162 of the first special tooling and the second mounting hole 0172 of the second special tooling, and the top screws are respectively installed in the top screw holes 040 on the sides of the first special tooling 021 and the second special tooling 022. The straightness of the second linear guide 012 is detected by the autocollimator 020. According to the detection result, the top screw on a certain side of the first special tooling 021 or the second special tooling 022 is adjusted so that the straightness of the second linear guide is within a specific value (10"). Then, the screws used to fix the second linear guide 012 are completely tightened to complete the installation and adjustment of the second linear guide 012.

[0034] S5, install the third linear guide rail 030 and adjust the parallelism of the third linear guide rail 030 relative to the second linear guide rail 012; see Figure 2 、 Figure 5 , clean and wipe the third linear guide rail 030, align the several mounting holes of the third linear guide rail 030 with the corresponding third linear guide rail mounting holes 0153 on the marble mounting platform 010 in sequence, keep the vertical reference surface of the third linear guide rail 030 aligned with the side of the second linear guide rail 012, and install the screws used to fix the third linear guide rail 030 on the marble mounting platform 010 in sequence, and do not pre-tighten the screws for the time being.

[0035] Using the second linear guide 012 as a reference, place the dial indicator head of the second detection device 032, equipped with a magnetic base and a micrometer, on the side reference surface of the third linear guide 030. The magnetic base is fixed to the slider 011 on the second linear guide 012. Slide the slider 011 on the second linear guide and adjust the third linear guide 030 based on the micrometer reading of the second detection device 032 until the parallelism between the third linear guide 030 and the reference (the second linear guide 012) is within a specified value (0.01mm). Do not fully tighten the screws securing the third linear guide 030 to the marble mounting platform 010 yet. Set the screws to an appropriate pre-tightening torque (e.g., set the screw tightening torque to two-thirds of the target torque).

[0036] S6, adjust the straightness of the third linear guide rail 030; refer to the straightness adjustment method of the second linear guide rail 012 (step S4) to adjust the straightness of the third linear guide rail 030. Figure 2 、 Figure 4 、 Figure 5 and Figure 6 , fix a plane reflector 023 on the slider 031 on the third linear guide rail, and align the first special tooling 021 and the second special tooling 022 with the third mounting hole 0163 of the first special tooling and the third mounting hole 0173 of the second special tooling on the marble mounting platform 010 respectively. Use screws to fix the first special tooling 021 and the second special tooling 022 to the marble mounting platform 010 respectively, and install the top screws into the top screw holes 040 on the sides of the first special tooling 021 and the second special tooling 022. Use the autocollimator 020 to detect the straightness of the third linear guide rail 030. According to the detection results, adjust the top screws on the sides of the first special tooling 021 and the second special tooling 022 to ensure that the straightness of the third linear guide rail 030 is within a specific value (10"), and then completely tighten all the screws used to fix the third linear guide rail 030 to complete the installation and adjustment of the third linear guide rail 030.

[0037] S7, install the first linear guide rail 051 and adjust the parallelism of the first linear guide rail 051 relative to the second linear guide rail 012; see Figure 2 、 Figure 8 , clean and wipe the first linear guide rail 051, align the several mounting holes of the first linear guide rail 051 with the corresponding first linear guide rail mounting holes 0151 on the marble mounting platform 010 in sequence, keep the vertical reference surface of the first linear guide rail 051 aligned with the side of the second linear guide rail 012, and install the screws used to fix the first linear guide rail 051 on the marble mounting platform 010 in sequence, and do not pre-tighten the screws for the time being.

[0038] Using the second linear guide 012 as a reference, place the dial indicator head of the second detection device 032, equipped with a magnetic base and a micrometer, on the side reference surface of the first linear guide 051. The magnetic base is fixed to the slider 011 on the second linear guide 012. Slide the slider 011 on the second linear guide and adjust the first linear guide 051 based on the micrometer reading of the second detection device 032 until the parallelism between the first linear guide 051 and the reference (the second linear guide 012) is within a specified value (0.01mm). Do not fully tighten the screws securing the first linear guide 051 to the marble mounting platform 010 yet. Set the screws to an appropriate pre-tightening torque (e.g., set the screw tightening torque to two-thirds of the target torque).

[0039] S8, adjust the straightness of the first linear guide rail 051; refer to the straightness adjustment method of the second linear guide rail 012 (step S4) to adjust the straightness of the first linear guide rail 051. Figure 2 、 Figure 4 、 Figure 6 and Figure 8 , fix a plane reflector 023 on the slider 052 on the first linear guide rail, and align the first special tooling 021 and the second special tooling 022 on the first special tooling first mounting hole 0161 and the second special tooling first mounting hole 0171 on the marble mounting platform 010 respectively. Use screws to fix the first special tooling 021 and the second special tooling 022 to the marble mounting platform 010 respectively, and install the top screws into the top screw holes 040 on the sides of the first special tooling 021 and the second special tooling 022. Use the autocollimator 020 to detect the straightness of the first linear guide rail 051. According to the detection results, adjust the top screws on one side of the first special tooling 021 or the second special tooling 022 so that the straightness of the first linear guide rail 051 is within a specific value (10"). Then, completely tighten the screws used to fix the first linear guide rail 051 to complete the installation and adjustment of the first linear guide rail 051.

[0040] like Figure 2 As shown, the marble mounting platform 010 is provided with the third mounting hole 0163 of the first special tooling, the third linear guide rail mounting hole 0153, the third mounting hole 0173 of the second special tooling, the second mounting hole 0162 of the first special tooling, the second linear guide rail mounting hole 0152, the second mounting hole 0172 of the second special tooling, the first mounting hole 0161 of the first special tooling, the first linear guide rail mounting hole 0151, and the first mounting hole 0171 of the second special tooling in parallel with each other.

[0041] Preferably, the straightedge 013 in step S1 is a rectangular straightedge, and its length is equivalent to the length of the three guide rails. The distance between the straightedge 013 and the second linear guide rail mounting hole 0152 is suitable for placing the marble base and micrometer of the first detection device 014.

[0042] Preferably, the specific steps of S3 are as follows:

[0043] Install the screws securing second linear guide 012 into second linear guide mounting holes 0152, but do not fully tighten. Place the bottom surface of the marble base of first detection device 014 on marble mounting platform 010, and place the dial indicator on the vertical reference surface of second linear guide 012. Move the marble base, keeping the reference surface of the marble base in close contact with the side of straightedge 013 during the movement. Adjust the position of second linear guide 012 according to the dial indicator reading, and tighten the screws securing second linear guide 012 sequentially, setting the screws to an appropriate pre-tightening torque (e.g., setting the screw tightening torque to two-thirds of the target torque) until the vertical reference surface of second linear guide 012 and the side of straightedge 013 are parallel to within 0.01 mm.

[0044] Preferably, the specific steps of S4 are as follows:

[0045] Secure the plane reflector 023 to the slider 011 of the second linear guide rail using adhesive or other means. Install the autocollimator 020 on a stable base (or tripod), keeping the centerline of the autocollimator 020 objective tube at the same height as the centerline of the plane reflector 023. Turn on the autocollimator 020 and calibrate it, adjusting the x- and y-axis measurements near the origin. Slide the slider 011 on the second linear guide rail back and forth, observing the changes in the x-axis reading of the autocollimator to determine the direction of the straightness deviation of the second linear guide rail 012. Adjust the top screw of the first dedicated tool 021 or the second dedicated tool 022 on the side of the deviation direction according to the deviation amount. For example, Figure 6 If the second linear guide rail 012 deviates to the left, tighten the top screw of the first special tooling 021 near the deviation. Otherwise, tighten the top screw on the second special tooling 022. Ensure that the straightness of the second linear guide rail 012 is within the tolerance (10"), and finally fully tighten all the screws used to fix the second linear guide rail 012.

[0046] Preferably, see Figure 6 、 Figure 7 The first and second dedicated fixtures 021 and 022 are identical in shape and size: both are rectangular strips, the same length as the linear guide rails, and slightly thinner than the gap between the sliders and the marble mounting platform 010. Both the first and second dedicated fixtures 021 and 022 contain two sets of holes: one set of countersunk holes for securing the fixtures, extending through the upper and lower surfaces of the first or second dedicated fixture 021 or 022; the other set of screw holes 040, located on the side of the first or second dedicated fixture 021 or 022, for adjusting the straightness of one side of the guide rail.

[0047] Preferably, the marble mounting platform 010 for installing the guide rail has reserved process holes: the first mounting hole 0161 of the first special tooling, the second mounting hole 0162 of the first special tooling, the third mounting hole 0163 of the first special tooling, the first mounting hole 0171 of the second special tooling, the second mounting hole 0172 of the second special tooling, and the third mounting hole 0173 of the second special tooling, which are used to install the first special tooling 021 and the second special tooling 022.

[0048] Preferably, the installation of the third linear guide rail 030 in step S5 and the installation of the first linear guide rail 051 in step S7 are both based on the slider 011 on the second linear guide rail.

[0049] Preferably, the specific adjustment method for adjusting the straightness of the first linear guide rail 051 in step S8 is consistent with the specific adjustment method for adjusting the straightness of the second linear guide rail 012 in step S4 and the specific adjustment method for adjusting the straightness of the third linear guide rail 030 in step S6.

[0050] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied to other related system fields, are also included in the scope of protection of the present invention.

[0052] The contents not described in detail in the specification of the present invention belong to the prior art known to those skilled in the art.

Claims

1. A high-precision assembly process for three parallel guide rails, characterized in that: The steps include: S1, install the straightedge; place the straightedge on the marble mounting platform, align the straightedge with the straight line where the second linear guide rail mounting hole is located, and secure the straightedge; S2, installing the second linear guide rail; aligning the mounting holes of the second linear guide rail with the second linear guide rail mounting holes on the marble mounting platform in sequence, and sequentially installing screws for fixing the second linear guide rail on the marble mounting platform, without pre-tightening the screws; S3, adjusting the parallelism of the second linear guide rail relative to the straightedge; using a first detection device comprising a marble base and a micrometer to detect and adjust the parallelism between the second linear guide rail and the straightedge to within 0.01 mm; S4, adjusting the straightness of the second linear guide rail so that the straightness of the second linear guide rail is within 10", and then tightening the screws used to fix the second linear guide rail; S5, installing the third linear guide rail and adjusting the parallelism of the third linear guide rail relative to the second linear guide rail; temporarily not completely tightening the screws used to fix the third linear guide rail to the marble mounting platform; S6, adjust the straightness of the third linear guide rail; ensure that the straightness of the third linear guide rail is within 10", and then tighten the screws used to fix the third linear guide rail; S7, installing the first linear guide rail and adjusting the parallelism of the first linear guide rail relative to the second linear guide rail; temporarily not tightening the screws used to fix the first linear guide rail to the marble mounting platform; S8, adjust the straightness of the first linear guide rail so that the straightness of the first linear guide rail is within 10", and finally tighten the screws used to fix the first linear guide rail.

2. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: S4 includes: fixing a plane reflector on the slider on the second linear guide; fixing the first special tooling and the second special tooling on both sides of the second linear guide and the marble mounting platform with screws in the holes corresponding to the second mounting hole of the first special tooling and the second mounting hole of the second special tooling, respectively, and inserting screws into the screw holes on the sides of the first special tooling and the second special tooling respectively; using an autocollimator to detect the straightness of the second linear guide, and adjusting the screws on a side of the first special tooling or the second special tooling according to the detection result so that the straightness of the second linear guide is within 10 inches, and then completely tightening the screws used to fix the second linear guide to complete the installation and adjustment of the second linear guide; S6 includes: fixing a plane reflector on the slider on the third linear guide rail, aligning the first special tooling and the second special tooling with the third mounting hole of the first special tooling and the third mounting hole of the second special tooling on the marble mounting platform, respectively, fixing the first special tooling and the second special tooling to the marble mounting platform with screws, and inserting screws into the screw holes on the sides of the first special tooling and the second special tooling; using an autocollimator to detect the straightness of the third linear guide rail, and adjusting the screws on the sides of the first special tooling and the second special tooling according to the detection results so that the straightness of the third linear guide rail is within 10 inches, and then completely tightening the screws used to fix the third linear guide rail to complete the installation and adjustment of the third linear guide rail; S8 includes: fixing a plane reflector on the slider on the first linear guide rail, aligning the first special tooling and the second special tooling on the first mounting hole of the first special tooling and the first mounting hole of the second special tooling on the marble mounting platform respectively; fixing the first special tooling and the second special tooling on the marble mounting platform respectively with screws, and installing screws into the screw holes on the sides of the first special tooling and the second special tooling; using an autocollimator to detect the straightness of the first linear guide rail, and according to the detection result, adjusting the screws on a certain side of the first special tooling or the second special tooling so that the straightness of the first linear guide rail is within 10 inches; then completely tightening the screws used to fix the first linear guide rail to complete the installation and adjustment of the first linear guide rail.

3. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that S5 include: Clean and wipe the third linear guide rail clean. Align the mounting holes of the third linear guide rail with the corresponding mounting holes of the third linear guide rail on the marble mounting platform. Keep the vertical reference surface of the third linear guide rail aligned with the side surface of the second linear guide rail. Install the screws used to fix the third linear guide rail to the marble mounting platform in sequence. Do not pre-tighten the screws yet. Using the second linear guide as a reference, place the dial indicator head of the second detection device with a magnetic base and a dial indicator on the side reference surface of the third linear guide, with the magnetic base fixed to the slider on the second linear guide. Slide the slider on the second linear guide and adjust the third linear guide according to the dial indicator reading of the second detection device until the parallelism between the third linear guide and the second linear guide is within 0.01 mm. Temporarily do not fully tighten the screws securing the third linear guide to the marble mounting platform, but set an appropriate pre-tightening torque for the screws. S7 includes: cleaning and wiping the first linear guide rail, sequentially aligning the plurality of mounting holes of the first linear guide rail with the corresponding first linear guide rail mounting holes on the marble mounting platform, keeping the vertical reference surface of the first linear guide rail aligned with the side surface of the second linear guide rail, and sequentially installing screws for fixing the first linear guide rail to the marble mounting platform without pre-tightening the screws; Taking the second linear guide as a reference, place the dial indicator head of the second detection device with a magnetic base and a dial indicator on the side reference surface of the first linear guide, and fix the magnetic base on the slider on the second linear guide; slide the slider on the second linear guide, and adjust the first linear guide according to the dial indicator reading of the second detection device until the parallelism of the first linear guide and the second linear guide is within 0.01mm; do not fully tighten the screws used to fix the first linear guide to the marble mounting platform, and set an appropriate pre-tightening torque for the screws.

4. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: The straightedge is a rectangular straightedge.

5. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: S3 includes: Install the screws used to fix the second linear guide into the mounting holes of the second linear guide but do not completely tighten them. Place the bottom surface of the marble base of the first detection device on the marble mounting platform, place the dial indicator head on the vertical reference surface of the second linear guide, move the marble base, and keep the vertical reference surface of the marble base close to the side of the straight ruler during the movement; adjust the position of the second linear guide according to the dial indicator reading, and tighten the screws used to fix the second linear guide in sequence, setting an appropriate pre-tightening torque for the screws until the parallelism of the vertical reference surface of the second linear guide and the side of the straight ruler is within 0.01mm.

6. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: S4 includes: fixing the plane reflector on the slider of the second linear guide rail by gluing or other fixing methods; installing the autocollimator on a stable base or tripod, keeping the center line of the autocollimator object tube at the same height as the center line of the plane reflector, turning on the autocollimator switch and calibrating it, and adjusting the x-axis and y-axis measurement values ​​near the origin; sliding the slider on the second linear guide rail back and forth, observing the change in the x-axis reading of the autocollimator, determining the straightness deviation direction of the second linear guide rail, adjusting the top screw of the first special tooling or the second special tooling on the side where the deviation direction is located according to the deviation amount, ensuring that the straightness of the second linear guide rail is within the tolerance range, and finally completely tightening all screws used to fix the second linear guide rail.

7. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: The first special tooling and the second special tooling have exactly the same shape and size, both are rectangular strips with the same length as the first linear guide, the second linear guide, and the third linear guide, and a thickness slightly smaller than the gap between the slider on the first linear guide, the slider on the second linear guide, or the slider on the third linear guide and the marble mounting platform; the first special tooling and the second special tooling both contain two groups of holes, one group is threaded holes for fixing the tooling, which pass through the upper and lower surfaces of the first special tooling or the second special tooling, and the other group is top screw holes, which are located on the side of the first special tooling or the second special tooling, and are used to adjust the straightness of one side of the guide rail.

8. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: The marble mounting platform is reserved in sequence as follows: the third mounting hole of the first special tooling, the third linear guide mounting hole, the third mounting hole of the second special tooling, the second mounting hole of the first special tooling, the second linear guide mounting hole, the second mounting hole of the second special tooling, the first mounting hole of the first special tooling, the first linear guide mounting hole, and the first mounting hole of the second special tooling are parallel to each other; the first mounting hole of the first special tooling, the second mounting hole of the first special tooling and the third mounting hole of the first special tooling are used to install the first special tooling; the first mounting hole of the second special tooling, the second mounting hole of the second special tooling and the third mounting hole of the second special tooling are used to install the second special tooling.

9. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: The installation of the third linear guide rail in step S5 and the installation of the first linear guide rail in step S7 are both based on the slider on the second linear guide rail.

10. The high-precision assembly process of three parallel guide rails according to claim 1, characterized in that: The specific adjustment method of adjusting the straightness of the first linear guide rail in step S8 is consistent with the specific adjustment method of adjusting the straightness of the second linear guide rail in step S4 and the specific adjustment method of adjusting the straightness of the third linear guide rail in step S6.

Images