Positioning base and positioning tool

Abstract

The utility model relates to the technical field of printed circuit boards, and provides a positioning base and a positioning tool. The positioning base comprises a base plate, a second positioning assembly and two first positioning assemblies, each first positioning assembly comprises a guide rail and a sliding block, and the guide rail is arranged on the base plate and perpendicularly intersects with the guide rail of the other first positioning assembly; the sliding blocks are arranged on the guide rail and are in sliding fit with the guide rail, the sliding blocks can be positioned in a stepless mode relative to the guide rail, and each sliding block is provided with a first positioning column; the second positioning assembly is arranged on the base plate and located at the intersection of the two sets of guide rails, and the second positioning assembly is provided with a second positioning column. According to the positioning base provided by the utility model, the position of the sliding block can be adjusted based on the positioning hole after the position is changed, and then the position of the first positioning column is adjusted, so that the position of the first positioning column is synchronously changed according to the position of the positioning hole, and the problem of position interference with the positioning column after the positioning hole deviates can be solved; therefore, the problem of printing offset can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to printed circuit board technical field especially relates to a positioning base and positioning frock. BACKGROUND

[0002] FPC soft board (flexible printed circuit board) has highly flexible and bendable, this makes FPC can bend and fold in three-dimensional space, meets the design requirement of various complex electronic equipment, therefore is widely applied in consumer electronics, automotive electronics, medical equipment etc.

[0003] In the FPC manufacturing stage, FPC is prone to expansion and contraction due to the influence of factors such as substrate characteristics, manufacturing process and design, when FPCA is carried out, the frock generally selects to use three-in-one tray (base + tray + cover sheet), the positioning of FPC is realized through the base design positioning column, however, the position of the positioning column is fixed, if the FPC manufacturing process appears expansion and contraction, the position of the positioning hole will appear deviation, the deviation between the FPC positioning hole and the base positioning column during FPC positioning will cause the printing to deviate when the first surface of FPC is processed. In addition, when the second surface is processed, due to the expansion and contraction in the manufacturing process of FPC, plus the reflow soldering after the first surface, FPC expands under high temperature, and shrinks during the cooling process, the expansion and contraction caused will further cause the size of FPC to change, when positioning again, the size matching of the FPC positioning hole and the base positioning column will become worse, which will further cause the printing effect to be worse. UTILITY MODEL CONTENTS

[0004] The first aspect of the utility model provides a positioning base to solve the defect that the positioning hole and the positioning column deviate, the position of the sliding block can be adjusted based on the positioning hole after the position changes, and then the position of the first positioning column is adjusted, so that the position of the first positioning column changes synchronously according to the position of the positioning hole, the problem that the positioning hole deviates and interferes with the positioning column can be solved, and then the problem of printing deviation can be solved.

[0005] The second aspect of the utility model provides a positioning frock.

[0006] The positioning base provided by the utility model comprises:

[0007] A base plate;

[0008] Two groups of first positioning assemblies, the first positioning assembly comprises a guide rail and a sliding block, the guide rail is arranged on the base plate and vertically intersects with the guide rail of the other group of first positioning assemblies, the sliding block is arranged on the guide rail and slidably connected with the guide rail, the sliding block can be steplessly positioned relative to the guide rail, and each sliding block is provided with a first positioning column;

[0009] A second positioning assembly is arranged on the base plate and located at the intersection of the two sets of guide rails, and the second positioning assembly is provided with a second positioning column.

[0010] The third positioning assembly is adsorbed to the base plate and is arranged at intervals from the first positioning assembly, and the third positioning assembly is provided with a third positioning column.

[0011] The third positioning assembly comprises a magnetic support table, and the base plate comprises an iron base plate which is magnetically attracted to the magnetic support table.

[0012] The third positioning column is arranged on the upper surface of the magnetic support table.

[0013] The base plate is provided with a plurality of scale squares, and the scale squares are used to represent the displacement of the third positioning assembly.

[0014] The guide rail is adsorbed to the base plate.

[0015] The guide rail is provided with a scale along the length direction, and the scale is used to represent the displacement of the sliding block.

[0016] The guide rail comprises a dovetail slide rail, and the sliding block is provided with a dovetail groove which is matched with the dovetail slide rail.

[0017] The first positioning assembly further comprises an adjusting shaft, the sliding block is provided with a through hole which is matched with the adjusting shaft, the through hole is communicated with the dovetail groove, the adjusting shaft is arranged in the through hole and is engaged with the rack of the dovetail slide rail.

[0018] The first positioning assembly further comprises a stop shaft, the stop shaft is arranged in the sliding block, and the stop shaft is used to limit the movement of the sliding block relative to the guide rail.

[0019] The positioning tool comprises the positioning base plate.

[0020] The positioning base provided by the utility model, through setting the second positioning assembly and the two groups of first positioning assemblies on the base plate, in the process of installing the FPC soft plate, the FPC soft plate can be supported and positioned by the first positioning column on the first positioning assembly and the second positioning column on the second positioning assembly, and the processing and manufacturing of the FPC soft plate are assisted, further, the guide rail and the sliding block are arranged in the first positioning assembly, and the sliding block can be steplessly positioned relative to the guide rail, if the position of the positioning hole changes due to expansion and contraction in the processing process of the FPC soft plate, the positioning base provided by the utility model can adjust the position of the sliding block based on the positioning hole after the position change, and then the position of the first positioning column is adjusted, so that the position of the first positioning column changes synchronously according to the position of the positioning hole, the problem of position interference between the positioning hole and the positioning column after the deviation of the positioning hole occurs can be solved, and then the problem of printing deviation can be solved, not only the processing precision of single-sided printing can be met, but also the processing precision of double-sided printing can be met.

[0021] In addition, the first positioning column on the first positioning assembly can move with the sliding block, so that the first positioning column can be adaptively adjusted according to the size of the actual FPC soft plate to be processed and the position of the positioning hole, that is, the assembly requirements of FPC soft plates of different sizes can be met, so that the positioning base has universality; based on this, in the online processing process, due to the universality of the positioning base, different sizes of the positioning base do not need to be frequently replaced, and the efficiency and flexibility of production can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 It is the axial side schematic view of the positioning base provided by the utility model embodiment.

[0024] Figure 2 It is the use schematic view of the positioning base provided by the utility model embodiment.

[0025] Figure 3 It is the cross-sectional structure schematic view of the first positioning assembly provided by the utility model embodiment.

[0026] Reference signs:

[0027] 100: substrate; 200: first positioning assembly; 210: guide rail; 220: sliding block; 230: first positioning column; 240: adjusting shaft; 250: stop shaft; 300: second positioning assembly; 310: second positioning column; 400: third positioning assembly; 410: third positioning column; 420: magnetic support table; 10: tray; 20: FPC soft board; 30: positioning base. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0032] Figure 1 is a shaft side schematic view of the positioning base provided by the embodiments of the utility model; Figure 2 is a use schematic view of the positioning base provided by the embodiments of the utility model.

[0033] Referring to Figure 1 and Figure 2 , the first aspect of the embodiments of the utility model provides a positioning base 30, the positioning base 30 includes the base plate 100, the second positioning assembly 300 and two groups of first positioning assemblies 200, the first positioning assembly 200 includes the guide rail 210 and the sliding block 220, the sliding block 220 is equipped with in the guide rail 210, and with the guide rail 210 sliding fit, the sliding block 220 can be stepless positioning relative to the guide rail 210, and each sliding block 220 is equipped with the first positioning column 230.

[0034] Here, it needs to be explained that stepless positioning means that the sliding block 220 can be freely slid along the length direction of the guide rail 210, can be slid to any position of the guide rail 210, and can be fixed at any position of the guide rail 210, specifically, can be understood by analogy with the stepless lifting in the prior art.

[0035] The guide rail 210 is arranged on the base plate 100, and the guide rails 210 of the two groups of first positioning assemblies 200 are perpendicular to each other, specifically, there are two ways of intersection, the first kind: the two groups of guide rails 210 are in "L" type structure, the second kind: the two groups of guide rails 210 are in "ten" type structure, the embodiments of the utility model take the first kind of structure as an example, and are exemplified and explained.

[0036] The second positioning assembly 300 is arranged on the base plate 100 and located at the intersection of the two groups of guide rails 210, the second positioning assembly 300 is provided with the second positioning column 310, and the first positioning column 230 and the second positioning column 310 are located on the same horizontal plane.

[0037] Referring to Figure 1 and Figure 2It can be understood that the positioning base 30 provided by the embodiment of the utility model, through setting second positioning assembly 300 and two groups of first positioning assembly 200 on the base plate 100, in the process of installing FPC soft board 20, first positioning column 230 on first positioning assembly 200 and second positioning column 310 on second positioning assembly 300 can be used to support and position FPC soft board 20, and the processing and manufacturing of FPC soft board 20 are assisted, further, guide rail 210 and sliding block 220 are arranged in first positioning assembly 200, and sliding block 220 can be steplessly positioned relative to guide rail 210, if the position of positioning hole changes due to expansion and contraction in the processing of FPC soft board 20, the positioning base 30 provided by the utility model can adjust the position of sliding block 220 based on the positioning hole after position change, and then the position of first positioning column 230 is adjusted, so that the position of first positioning column 230 changes synchronously according to the position of positioning hole, the problem of position interference between positioning hole and positioning column after the deviation of positioning hole occurs can be solved, and the problem of printing deviation can be solved, so that the processing precision of single-sided printing can be met, and the processing precision of double-sided printing can also be met.

[0038] In addition, the first positioning column 230 on the first positioning assembly 200 can move with the sliding block 220, so that the first positioning column 230 can be adaptively adjusted according to the size of the actual FPC soft board 20 to be processed and the position of the positioning hole, that is, the assembly requirements of FPC soft boards 20 of different sizes can be met, so that the positioning base 30 has universality; based on this, during online processing, due to the universality of the positioning base 30, it is not necessary to frequently replace positioning bases 30 of different sizes, so that the efficiency and flexibility of production can be improved.

[0039] Continuing to refer to Figure 1 In an optional embodiment of the utility model, the second positioning assembly 300 includes a fixed support table, the fixed support table is arranged at the intersection of the two groups of guide rails 210, the second positioning column 310 is embedded on the upper surface of the fixed support table, and the fixed mode between the fixed support table and the base plate 100 can be welding, threaded connection or fastener connection, and specifically, adaptive selection can be made according to actual conditions.

[0040] Continuing to refer to Figure 1 In an optional embodiment of the utility model, the first positioning assembly 200 is fixedly connected with the base plate 100, and the fixed connection mode can also be welding, threaded connection or fastener connection, and taking fastener connection as an example, specifically, a plurality of threaded holes can be arranged at the corresponding positions of the base plate 100, and corresponding threaded holes are also arranged on the first guide rail 210, and the locking between the guide rail 210 and the base plate 100 is realized through screws or bolts.

[0041] Continuing to refer to Figure 1In the optional embodiment of the utility model, the positioning base 30 further comprises a third positioning assembly 400, the third positioning assembly 400 is adsorbed to the substrate 100 and is arranged at intervals with the first positioning assembly 200, the third positioning assembly 400 is simultaneously located at the inner side of the included angle of two groups of guide rails 210, and the third positioning assembly 400 is provided with a third positioning column 410.

[0042] The adsorption mode can be magnetic adsorption or vacuum negative pressure adsorption, such as existing products such as magnets or suction cups. Figure 1 It can be understood that, in the positioning base 30 provided by the utility model embodiment, the third positioning assembly 400 is arranged, so that the third positioning column 410, the second positioning column 310 and the two first positioning columns 230 form a four-corner positioning structure, so that the stability of the FPC soft board 20 is better during the assembly process of the FPC soft board 20, and the smooth processing of the FPC soft board 20 can be ensured.

[0043] In addition, since the third positioning assembly 400 is adsorbed on the substrate 100, the third positioning assembly 400 can also move relative to the substrate 100, which is similar to the first positioning assembly 200, if the position of the positioning hole changes due to expansion and contraction during the processing of the FPC soft board 20, the positioning base 30 provided by the utility model can adjust the position of the third positioning assembly 400 relative to the substrate 100 based on the changed positioning hole, and then adjust the position of the third positioning column 410, so that the position of the third positioning column 410 changes synchronously according to the position of the positioning hole, which can solve the problem of position interference between the third positioning column 410 and the positioning hole after the deviation of the positioning hole, and then solve the problem of printing deviation.

[0044] In addition, since the third positioning column 410 on the third positioning assembly 400 can move relative to the substrate 100, the third positioning column 410 can be adaptively adjusted according to the size of the actual FPC soft board 20 to be processed and the position of the positioning hole, that is, the assembly requirements of FPC soft boards 20 of different sizes can be met, and the universality of the positioning base 30 can be ensured.

[0045] Continuing to refer to Figure 1 In the optional embodiment of the utility model, the third positioning assembly 400 comprises a magnetic support table 420, the substrate 100 comprises an iron substrate 100 magnetically adsorbed with the magnetic support table 420, and the third positioning column 410 is arranged on the upper surface of the magnetic support table 420.

[0046] The magnetic support table 420 can be made of a magnetic material, such as a permanent magnet or an electromagnet; in alternative embodiments of the utility model, the adsorption relationship between the third positioning assembly 400 and the base plate 100 can also be interchanged, for example, the base plate 100 is provided with a magnetic structure, and the third positioning assembly 400 is made of any material of iron, cobalt or nickel, and specifically, can be adaptively set according to actual conditions.

[0047] Referring to Figure 1 It can be understood that, in the positioning base 30 provided by the embodiments of the utility model, the magnetic support table 420 and the iron base plate 100 are arranged, so that the positioning of the third positioning assembly 400 relative to the base plate 100 can be realized through magnetic attraction cooperation, the magnetic attraction cooperation is easy to operate, has good flexibility, and can quickly realize connection positioning and decoupling; in addition, the magnetic attraction cooperation can provide strong adsorption force, so as to ensure the stability of the third positioning assembly 400, and further ensure the stability of the support and positioning of the third positioning assembly 400 on the FPC soft plate 20.

[0048] In alternative embodiments of the utility model, a plurality of scale squares are arranged on the base plate 100, and the scale squares are used to ensure the displacement amount of the third positioning assembly 400; specifically, in the use process, the distance that the third positioning column 410 needs to be offset synchronously can be estimated according to the position change of the positioning hole on the FPC soft plate 20, based on the reference of the scale square, the position of the third positioning column 410 can be determined before the FPC soft plate 20 is installed, so that the complicated calibration process can be avoided, and the assembly efficiency of the FPC soft plate 20 can be improved; in addition, when the third positioning assembly 400 is fine-tuned, the offset amount of adjustment can be clearly and directly obtained based on the positioning square, so that on the one hand, the adjustment accuracy can be improved, and on the other hand, the adjustment efficiency can be improved.

[0049] In alternative embodiments of the utility model, the guide rail 210 is adsorbed to the base plate 100, and the adsorption cooperation between the guide rail 210 and the base plate 100 can be referred to the third positioning assembly 400 and the base plate 100 described above, and specifically, this will not be described herein again. It can be understood that, by allowing the guide rail 210 to be adsorbed to the base plate 100, the position of the guide rail 210 relative to the base plate 100 can be adjusted, and the flexibility of the positioning base 30 can be improved; in addition, due to the structural characteristics of the guide rail 210 itself, the sliding block 220 can only move relative to the base plate 100 along the length direction of the guide rail 210, and by allowing the guide rail 210 to be adsorbed to the base plate 100, the sliding block 220 can be arbitrarily moved relative to the base plate 100, and the arbitrary position of the sliding block 220 relative to the base plate 100 can be changed, so that the flexibility of the first positioning column 230 can be effectively improved, and the universality and versatility of the positioning base 30 can be better.

[0050] Based on the foregoing scale grid setting, the scale grid can also be used to represent the displacement amount of the guide rail 210 and the displacement amount of the slider 220, so that the scale grid has a more extensive role and the positioning base 30 has stronger functionality. During use, the distance that the first positioning column 230 needs to be offset synchronously can be estimated according to the position change of the positioning hole on the FPC soft board 20. Based on the reference of the scale grid, the position of the first positioning column 230 can be determined before the FPC soft board 20 is installed, that is, the position of the first positioning assembly 200 is determined in advance. In this way, the complicated calibration process can be avoided, and the assembly efficiency of the FPC soft board 20 can be improved. In addition, when the first positioning assembly 200 is fine-tuned, the offset amount of the adjustment can be clearly and directly obtained based on the positioning grid. In this way, on the one hand, the adjustment accuracy can be improved, and on the other hand, the adjustment efficiency can be improved.

[0051] In the optional embodiment of the utility model, the guide rail 210 is provided with a scale along the length direction, and the scale is used to represent the displacement amount of the slider 220. It can be understood that the displacement amount of the slider 220 can be accurately determined by setting the scale on the guide rail 210. During use, the distance that the first positioning column 230 needs to be offset synchronously can be estimated according to the position change of the positioning hole on the FPC soft board 20. Based on the reference of the scale of the guide rail 210, the position of the first positioning column 230 can be determined before the FPC soft board 20 is installed, that is, the position of the first positioning assembly 200 is determined in advance. In this way, the complicated calibration process can be avoided, and the assembly efficiency of the FPC soft board 20 can be improved. In addition, when the first positioning assembly 200 is fine-tuned, the offset amount of the adjustment can be clearly and directly obtained based on the scale of the guide rail 210. In this way, on the one hand, the adjustment accuracy can be improved, and on the other hand, the adjustment efficiency can be improved. The scale of the guide rail 210 can also form a redundant design with the scale grid in the foregoing embodiment, and they can be used as a reference to each other, so that the adjustment accuracy of the first positioning column 230 can be further improved.

[0052] Figure 3 is a cross-sectional structure schematic view of the first positioning assembly provided by the embodiment of the utility model.

[0053] Referring to Figure 1 and Figure 3In an optional embodiment of this utility model, the guide rail 210 includes a dovetail slide rail, and the slider 220 is provided with a dovetail groove adapted to the dovetail slide rail. That is, in this embodiment of the utility model, the first positioning component 200 can be a dovetail slide table. It is understood that the dovetail groove and the dovetail slide rail, due to their own dovetail structure, have better stability than other common guide rails. They are not prone to deformation and vibration during movement. Moreover, the dovetail structure can effectively limit the movement direction of the slider 220, which can achieve high-precision linear movement and help improve the processing quality of the FPC flexible board 20. In addition, the dovetail structure has high rigidity and can withstand large loads and inertial forces, which can ensure stability during movement and under heavy load conditions.

[0054] Continue reading Figure 3 In an optional embodiment of this utility model, the first positioning component 200 further includes an adjusting shaft 240. The slider 220 is provided with a through hole adapted to the adjusting shaft 240, the through hole communicating with the dovetail groove. The adjusting shaft 240 passes through the through hole and meshes with the rack on the dovetail slide rail. Specifically, during use, by rotating the adjusting shaft 240, the slider 220 can move relative to the dovetail slide rail. It is understood that the gear and rack meshing method has good stability and high reliability, and can withstand a large load, which can ensure the accuracy of the slider 220's movement, thereby ensuring the accuracy of the displacement adjustment of the first positioning post 230, and helping to improve the processing quality of the FPC flexible board 20.

[0055] Continue reading Figure 3 In an optional embodiment of this utility model, the first positioning component 200 further includes a stop shaft 250, which passes through the slider 220. The stop shaft 250 is used to limit the movement of the slider 220 relative to the guide rail 210. It can be understood that by setting the stop shaft 250, the stability of the slider 220 after positioning can be guaranteed, and the phenomenon of slider 220 offset during operation can be avoided. This can ensure the stability of the first positioning post 230 and help improve the processing quality of the FPC flexible board 20. The specific settings of the stop shaft 250 and the adjustment shaft 240 can be referred to the dovetail slide adaptive design in the prior art. Specifically, they will not be described in detail here.

[0056] The following shows the assembly process of the positioning base 30 provided in an optional embodiment of the present invention.

[0057] (1) Fix the two dovetail slides to the base plate 100 by screws.

[0058] (2) Place the magnetic support platform 420 on the substrate 100 according to the size of the processed FPC flexible board 20 and the position of the positioning hole on the FPC flexible board 20.

[0059] (3), the positioning hole of the FPC soft board 20 one corner and the second positioning column 310 on the base 100 base realizes fixed.

[0060] (4), the position of the slider 220 on the dovetail slide is adjusted, and the first positioning column 230 is fixed with the FPC soft board 20.

[0061] (5), the third positioning column 410 on the magnetic support table 420 is positioned with the FPC soft board 20.

[0062] (6), when printing twice, if the FPC soft board 20 appears expansion and contraction, the position of the first positioning column 230 can be adjusted through the dovetail slide, and the magnetic support table 420 is adjusted to realize assembly.

[0063] The second aspect of the embodiment of the utility model provides a kind of positioning tool, and positioning tool includes tray 10, cover sheet and the positioning base 30 described in any one of the preceding embodiments, in the assembly process of FPC soft board 20, FPC soft board 20 can be installed on tray 10 first, then tray 10 is installed on positioning base 30 correspondingly, finally cover sheet is set above FPC soft board 20, to realize the positioning of FPC soft board 20, it can be understood that the positioning tool provided in the embodiment of the utility model, because it includes the positioning base 30 described in any one of the preceding embodiments, so it also has the beneficial effects possessed by the positioning base 30 in any one of the preceding embodiments, specifically, please refer to the preceding description, this paper will not be described one by one here.

[0064] It should be noted that the technical solutions in the various embodiments of the utility model can be combined with each other, but the basis of mutual combination is that the ordinary skilled person in the art can realize it; when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, that is, it is not within the protection scope of the utility model.

[0065] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the preceding embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the preceding embodiments, or make equivalent replacement to part of technical features; and these modifications or replacements do not make the essence of corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A positioning base, characterized by, The positioning base comprises: a substrate; two groups of first positioning assemblies, each of which comprises a guide rail and a sliding block, the guide rail is arranged on the substrate and intersects perpendicularly with the guide rail of the other group of first positioning assemblies, the sliding block is arranged on the guide rail and is in sliding cooperation with the guide rail, the sliding block can be steplessly positioned relative to the guide rail, and each sliding block is provided with a first positioning column; a second positioning assembly arranged on the substrate and located at the intersection of the two groups of guide rails, and the second positioning assembly is provided with a second positioning column.

2. The positioning base of claim 1, wherein, The positioning base further comprises a third positioning assembly, which is adsorbed on the substrate and is arranged in a spaced manner with the first positioning assembly, and the third positioning assembly is provided with a third positioning column.

3. The positioning base of claim 2, wherein, The third positioning assembly comprises a magnetic support table, and the substrate comprises a ferrous substrate which is in magnetic adsorption cooperation with the magnetic support table. The third positioning column is arranged on the upper surface of the magnetic support table.

4. The positioning base of claim 2, wherein, A plurality of scale squares are arranged on the substrate, and the scale squares are used to represent the displacement amount of the third positioning assembly.

5. The positioning base of claim 4, wherein, The guide rail is adsorbed on the substrate.

6. A positioning base according to any one of claims 1 to 5, characterized in that The guide rail is provided with a scale along the length direction, and the scale is used to represent the displacement amount of the sliding block.

7. A positioning base according to any one of claims 1 to 5, characterized in that The guide rail comprises a dovetail sliding rail, and the sliding block is provided with a dovetail groove matched with the dovetail sliding rail.

8. The positioning base of claim 7, wherein, The first positioning assembly further comprises an adjusting shaft, the sliding block is provided with a through hole matched with the adjusting shaft, the through hole is in communication with the dovetail groove, the adjusting shaft is arranged in the through hole and is in meshing cooperation with the rack of the dovetail sliding rail.

9. The positioning base of claim 8, wherein, The first positioning assembly further comprises a stop shaft, the stop shaft is arranged in the sliding block, and the stop shaft is used to limit the movement of the sliding block relative to the guide rail.

10. A positioning fixture, characterized by, The positioning base comprises the positioning base according to any one of claims 1 to 9.

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