A shape precision detection device for a key structural part of a machining center

Abstract

The utility model discloses a kind of for machining center key structural member shape precision detection device, belong to product detection technical field.The device includes L-shaped support, linear guide assembly and measuring component;L-shaped support includes long direction support and short direction support, longitudinal axis of two perpendicular each other, and it is columnar rigid component of rectangular section all;Long direction support includes the first datum surface and side surface that are adhered with the measured structural member;Short direction support includes the second datum surface opposite with the measured structural member, and the side surface adjacent with second datum surface;Linear guide assembly is set on at least one side surface adjacent with second datum surface;Measuring component is slidably arranged on linear guide assembly;The extension direction of linear guide assembly is perpendicular with the longitudinal axis of long direction support, and it is parallel with the longitudinal axis of short direction support.The reference system geometry of this detection device is clear and can repeat linear detection, and give consideration to clamping adaptability, structural rigidity and light weight, operation safety and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of product testing technology, and in particular to a device for testing the shape accuracy of key structural components in machining centers. Background Technology

[0002] In machining centers, the geometric accuracy (such as straightness, flatness, and perpendicularity) of key structural components directly affects the positioning accuracy, motion accuracy, and stability of the entire machine during machining and assembly. Therefore, in the field of CNC machine tool processing and manufacturing, the accuracy inspection of parts and components is crucial throughout multiple stages from part machining and assembly to complete machine delivery, with perpendicularity inspection, which is related to the datum, being the most critical. Currently, commonly used inspection methods include coordinate measuring machine (CMM) inspection and self-testing using a dial indicator on the machine tool. While the former offers high accuracy and comprehensive data, it incurs high equipment investment and operating costs, has stringent requirements for site and environmental conditions, and imposes limitations on the weight and dimensions of the measured parts, making it difficult to meet the demands of assembly line speed and flexibility. The latter, essentially a "pseudo-dial" inspection relying on the machine tool's geometry, is susceptible to the superposition of geometric errors and thermal drift in the readings, leading to discrepancies between the inspection results and the actual workpiece accuracy. It also consumes equipment capacity, placing high demands on equipment accuracy stability and scheduling, and can disrupt production scheduling when performing interoperability testing between different machines.

[0003] In addition, while some existing field fixtures or platform solutions can perform linear swivel tests, they lack a stable and clear geometric binding between their guiding / scanning direction and the reference system of the test part, resulting in insufficient constraints on the degree of freedom of positioning. This leads to poor repeatability of clamping orientation and insufficient data consistency between different operators or batches. At the same time, problems such as limited clamping and orientation adjustment methods, difficulty in balancing structural lightweighting and rigidity, and insufficient end-point anti-detachment and maintenance convenience also restrict rapid testing and data reliability improvement during the manufacturing process.

[0004] Therefore, how to perform repeatable linear scanning inspections on key structural components of machining centers with clear geometric relationships to the reference system without relying on large-scale metrology equipment and the precision of the machine tool, while taking into account clamping adaptability, structural rigidity and lightweight, operational safety and convenient maintenance, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the existing technology, such as high equipment investment, strong dependence on the status of the mother machine, and difficulty in stably reproducing the guiding orientation, this utility model provides a shape accuracy detection device for key structural components in machining centers, which integrates mutually perpendicular linear guides and measuring components into one unit and has repeatable positioning and assembly adjustment capabilities.

[0006] In a first aspect, this utility model provides a shape accuracy detection device for key structural components of a machining center, including an L-shaped bracket, a linear guide assembly, and a measuring component; The L-shaped bracket includes an integrally formed long bracket and a short bracket, the longitudinal axes of which are perpendicular to each other, and both are columnar rigid components with rectangular cross-sections. The longitudinal support includes a first reference surface that fits into the structural component being measured; The short-range support includes a first reference surface opposite to the structure being measured, and a side surface adjacent to the second reference surface; A linear guide assembly is provided on the side adjacent to the second reference plane; The linear guide assembly is provided with a sliding measuring component; The extension direction of the linear guide assembly is perpendicular to the longitudinal axis of the long support and parallel to the longitudinal axis of the short support.

[0007] The technical principle of this invention lies in solidifying the longitudinal and short supports into a single rigid body with their longitudinal axes perpendicular to each other in an integrated "L" shape. Mounting planes that fit / oppose the measured structural component are respectively set on both supports. Simultaneously, a linear guide assembly is arranged on the side adjacent to the second reference plane, with its extension direction perpendicular to the axis of the longitudinal support and parallel to the axis of the short support. Through this geometric binding, the coordinate system established by the clamping and the linear scanning direction of the measurement are determined within the same carrier and cannot drift. This merges the "positioning chain" and the "measurement chain" into a short chain, forming a closed-loop transmission of error within the body, significantly reducing the coupling influence of external fixtures, platform attitude, or the geometry of the host machine on the measurement direction. Both supports use rectangular cross-section columnar rigid components, providing high resistance to bending, torsion, and vibration. This allows the device to maintain the straightness and stability of the measurement direction while keeping the volume controllable, ensuring that the indicated value during continuous sampling accurately reflects the straightness / flatness fluctuations of the measured surface and its geometric deviation relative to the clamping reference.

[0008] The choice of a one-piece molding structure is based on a comprehensive consideration of both process and performance. The support is designed and integrally molded according to the concept of a box / chamber casting, which avoids the cumulative tolerances and residual stresses caused by separate assembly, and the geometric relationship is more stable under long-term use. The molded support can be placed horizontally on the table of a gantry machining center, and the key planes related to clamping and guiding can be precision machined in one clamping. The perpendicular / parallel relationship between surfaces can be established directly by utilizing the geometric accuracy of the machine tool, shortening the machining chain of related accuracy, reducing the reference transfer and tool setting errors caused by multiple clamping, and improving interchangeability and batch consistency from the manufacturing process. Based on the above design and process path, this device achieves the goals of "high rigidity, short chain, and error closed loop" without increasing structural complexity, and the repeatability, traceability and field efficiency of measurement results are significantly improved.

[0009] Furthermore, the non-first reference surface and the mounting surface of the non-linear guide component of the L-shaped bracket are hollowed-out mesh rib plate structures.

[0010] The hollowed-out mesh rib structure includes a peripheral frame and staggered ribs arranged therein, with an array of openings between adjacent ribs, and the ribs and the peripheral frame are integrally formed.

[0011] The surrounding frame forms a load-bearing closed loop, and the staggered ribs within the frame create multiple force-bearing pathways, significantly reducing the elastic deflection of the support under clamping forces, sliding inertial forces, and probe preload. Compared to simple thickening or solid blocks, the perforated grid arrangement effectively reduces weight while maintaining or improving rigidity, facilitating on-site handling and rapid clamping, reducing additional loads on the test piece's support surface, and minimizing posture changes caused by its own weight. The grid openings also facilitate chip dispersion and ventilation, reducing dust accumulation interference with the guiding and clamping areas, and simplifying maintenance and cleaning. When the staggered ribs are arranged in two sets of orthogonal orientations, they can respectively bear bending and torsional loads aligned with / perpendicular to the longitudinal axes of the two supports. Continuous ribs and corner braces at the inner corners create a local "box-shaped" structure at the L-shaped corners, reducing stress concentration and local torsional sway. Because the ribs and surrounding frame are integrally formed, assembly errors and connection loosening introduced by welding / assembly are eliminated, resulting in more reliable geometric relationships over long-term use.

[0012] Furthermore, the first reference surface (300) is provided with a mounting groove (3); The vertical sidewall of the groove is defined as the third reference surface (500), the outer side of the linear guide assembly (1) is defined as the fourth reference surface (600), and the bottom surface of the assembly that contacts the short support (102) is defined as the fifth reference surface (700). Each reference plane satisfies at least one of the following conditions: 1) The perpendicularity between the first datum plane (300) and the third datum plane (500) is less than 0.01 over the entire length of each datum plane. 2) The perpendicularity between the first datum plane (300) and the fifth datum plane (700) is less than 0.01 over the entire length of each datum plane; 3) The perpendicularity between the first datum plane (300) and the fourth datum plane (600) is less than 0.01 over the entire length of each datum plane; 4) The difference between the first datum plane (300) and the third datum plane (500) / the fourth datum plane (600) and the fifth datum plane (700) / the first datum plane (300) and the fourth datum plane (600) shall not exceed 0.006 mm within any 300 mm sampling length.

[0013] By clearly establishing five mutually constraining geometric references (first, second, third, fourth, and fifth) on the device, the "clamping reference chain (first and third)" and the "guiding / measuring reference chain (fourth and fifth)" are essentially orthogonally bound and transferred surface to surface within the same rigid frame: the first reference surface is a long strip mounting reference that directly fits with the workpiece under test; the third reference surface is the vertical sidewall of the mounting groove within the first reference surface, used to laterally limit and constrain the clamping posture; the guide module uses its outer fourth reference surface and bottom fifth reference surface as its own assembly reference, establishing a surface-to-surface constraint with the short support (guide bearing side). By simultaneously limiting the perpendicularity of the first reference plane to the third reference plane, the fourth reference plane to the fifth reference plane, and the first reference plane to the fourth reference plane to a total perpendicularity of ≤0.01, it is equivalent to forcing the normal of the clamping coordinate system (defined by the first and third reference planes) and the normal of the guide axis (defined by the fourth and fifth reference planes) to be orthogonal. This is further supplemented by local straightness / perpendicularity control of ≤0.006mm within any 300mm sampling length to avoid slight swaying of the measurement axis caused by local bending or waviness even if the total length is satisfied.

[0014] Furthermore, the mounting groove is at least one of a straight adjustment groove, an arc-shaped adjustment groove, or a T-shaped groove, and the mounting groove has a waist-shaped mounting hole.

[0015] Furthermore, the detection device also includes a limiting member, which includes a cover disposed at opposite ends of the linear guide assembly, each cover being detachably fixed to the linear guide assembly by a positioning pin and a fastening screw; The inner side of the cover is provided with a stop block that abuts against the end of the slide block, and the stop block is a replaceable part.

[0016] Furthermore, a waist-shaped mounting hole or a linear adjustment groove is provided along a predetermined direction on the first reference surface for linear coarse adjustment. The two ends of the groove are rounded and equipped with widened shims / long hole washers to improve stress stability. A fine adjustment screw or eccentric sleeve is provided on one side of the coarse adjustment channel to cooperate with the positioning pin to form a fine adjustment mechanism. This combination can quickly align the groove while ensuring clamping force, shorten the clamping time and reduce adjustment rebound, and improve clamping repeatability and linear scanning consistency.

[0017] Furthermore, the measuring component includes a slide disposed along the linear guide assembly and a dial indicator detachably connected to the slide; The slide block and the linear guide assembly are slidably connected and can reciprocate. The dial indicator is detachably fixed to the mounting base of the measuring component, and the measuring axis of the dial indicator is perpendicular to the extension direction of the linear guide assembly.

[0018] The slide and linear guide assembly form a reciprocating sliding fit, allowing the dial indicator to repeatedly translate along a single direction with the slide, achieving continuous sampling of the measured surface along a fixed measurement path. Compared to handheld or unguided measurements, the sliding pair isolates the operator's uncertainties, and combined with the orthogonal orientation constraint of the device body, significantly improves the consistency and repeatability of readings. The dial indicator is detachably fixed to the measuring component mounting base, facilitating quick replacement, maintenance, and periodic calibration. It also allows for the replacement of different dial indicator models based on range or sensitivity requirements, reducing maintenance costs and ensuring measurement reliability over long-term use.

[0019] By limiting the measuring axis of the dial indicator to be perpendicular to the extension direction of the linear guide, cosine error can be suppressed structurally, making the indicated value proportional to the actual displacement change of the measured surface in the scanning direction, which facilitates the direct interpretation of indicators such as straightness / perpendicularity.

[0020] Furthermore, the dial indicator has a spring-preloaded probe end.

[0021] The dial indicator features a spring-loaded probe end, which provides a relatively constant contact force during the reciprocating motion of the slide, ensuring that the probe continuously and stably tracks the minute undulations of the measured surface and reducing the impact of fluctuations and instability on the readings. At the same time, it has a certain degree of compliance when crossing minute steps or textures, balancing sensitivity and durability, thereby further improving the smoothness, reproducibility, and reliability of linear scan data.

[0022] Furthermore, the measuring component mounting base includes a swing angle fine-tuning mechanism and an eccentricity fine-tuning mechanism.

[0023] The swing angle fine adjustment mechanism and the eccentric fine adjustment mechanism are locked by independent locking components.

[0024] The tilt / swivel adjustment is used to correct the pitch / swivel angle of the dial indicator, while the eccentric adjustment is used to eliminate lateral offset and minor coaxiality errors. Together, they ensure that the measuring axis and the guide extension direction are orthogonal, significantly suppressing cosine errors and optimizing the contact point position. After independent locking, the adjustment settings remain stably reproducible after reciprocating scans and dial indicator / probe changes, thereby improving the accuracy and repeatability of straightness / perpendicularity readings and shortening on-site alignment and reset time.

[0025] Furthermore, the measuring component mounting base and the slide are hinged together by a rotating shaft or a turntable connector. The rotation axis of the connector is parallel to the extension direction of the linear guide assembly, allowing the dial indicator to rotate around the rotation axis within a predetermined angle range. The turntable is provided with an angle scale and a locking mechanism for locking at different angle positions, enabling the dial indicator probe to perform measurements in multiple directions within the same plane.

[0026] By adding a rotatable and lockable connecting device between the slide and the measuring head, the dial indicator can flexibly adjust its angle in the vertical plane of the linear guide direction, enabling the measurement of the workpiece in different planes under the same installation condition. This structure not only expands the detection range of the device and reduces the workload of repeated disassembly and recalibration, but also ensures the stability and repeatability of the probe orientation at different angles, thereby improving measurement efficiency and data consistency.

[0027] Furthermore, the linear guide assembly is a quick-change guide module, adapted to at least one of linear guide rails and sliders, dovetail slides, or guide rods and linear bearings.

[0028] The use of quick-change guide modules allows for rapid interchange of linear guides with sliders, dovetail slides, or guide rods with linear bearings in the same mounting position. Flexible selection based on site environment, accuracy requirements, and stroke load avoids limitations imposed by a single guide configuration. Symmetrical hole groups and a repeatable positioning structure ensure consistent positioning after model changes, maintaining the guide axis orientation and device reference relationship. This allows for maintenance or switching without recalibration, reducing downtime and improving batch consistency. Modular design also facilitates independent replacement and maintenance of consumable parts, lowering overall maintenance costs.

[0029] The precision detection device provided by this utility model has at least the following beneficial effects: This invention defines the longitudinal axes of the long and short supports as perpendicular to each other, respectively supporting the first and second reference surfaces that are in contact with / opposite to the measured structural component. A linear guide assembly is installed on the side of the second reference surface of the short support, enabling the "clamping reference chain - guiding measurement chain" to be orthogonally bound within the same L-shaped rigid body. The extension direction of the linear guide assembly is explicitly defined as perpendicular to the longitudinal axis of the long support and parallel to the longitudinal axis of the short support. The slide carries a dial indicator with its measuring axis perpendicular to the guiding direction, thereby suppressing cosine error at the structural level and ensuring a one-to-one correspondence between the linear scanning direction and the workpiece reference system. This yields measurement results independent of the machine tool's condition, significantly improving the accuracy of perpendicularity / straightness interpretation and solving the core problems of existing technologies, such as strong dependence on the geometry of large metrology equipment or the machine tool and difficulty in stably reproducing the guiding orientation. Attached Figure Description

[0030] Figure 1 The structural diagram of the L-shaped bracket of the detection device provided by this utility model; Figure 2 A schematic diagram of the short-axis support structure of the detection device provided by this utility model; Figure 3 An operational schematic diagram of a shape accuracy detection device for key structural components in a machining center, provided by this utility model; Figure 4Four views of the L-shaped bracket for the detection device provided by this utility model; Figure 5 Cross-sectional views of reference surfaces A / B / C / D in the detection device provided by this utility model.

[0031] Explanation of reference numerals in the attached figures: 100. L-shaped bracket; 101. Longitudinal bracket; 102. Shortitudinal bracket; 200. Component under test; 1. Linear guide assembly; 2. Measuring component; 21. Slide; 22. Dial indicator; 3. Mounting groove; 4. Waist-shaped mounting hole; 5. Limiting component; 300. First reference plane; 400. Second reference plane; 500. Third reference plane; 600. Fourth reference plane; 700. Fifth reference plane. Detailed Implementation

[0032] To better understand the above technical solutions, a detailed description of the solutions will be provided below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0034] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0035] like Figure 1-5 As shown, a shape accuracy detection device for key structural components in a machining center is disclosed. The device includes an L-shaped bracket 100, a linear guide assembly 1, and a measuring component 2, wherein: The L-shaped bracket 100 includes a long bracket 101 and a short bracket 102, the longitudinal axes of which are perpendicular to each other, and both are columnar rigid members with rectangular cross-sections. The outer side of the longitudinal support 101 forms a first reference surface 300 that fits against the structure under test 200. An installation groove 3 is formed within this plane, and an adjustment installation structure is provided within the groove. The installation groove 3 is at least one of a straight adjustment groove, an arc-shaped adjustment groove, or a T-shaped groove. The installation groove 3 has waist-shaped installation holes 4, which are arranged along the installation groove 3 and used in conjunction with fasteners to connect and align with the corresponding installation area of ​​the structure under test 200. The non-functional side of the longitudinal support 101, excluding the first reference surface 300, is provided with a perforated grid rib structure, which is integrally formed by a peripheral frame surrounding the outer edge of the longitudinal support 101 and internal interlaced ribs. Adjacent ribs form an open array and are integrally formed with an L-shaped support.

[0036] A second reference surface 400 is formed on the outer side of the short support 102, opposite to the structure being measured 200. A mounting strip for the linear guide assembly 1 is provided on at least one side adjacent to the second reference surface 400, and the guide assembly is fixed to this mounting strip. The extending direction of the guide assembly is perpendicular to the longitudinal axis of the long support 101 and parallel to the longitudinal axis of the short support 102, thereby directly binding the scanning direction to the orthogonal orientation of the support. The non-functional sides of the short support 102, excluding the side with the linear guide assembly 1, are also provided with a perforated mesh rib structure.

[0037] The linear guide assembly 1 is a quick-change guide module, compatible with at least one of linear guide rails and sliders, dovetail slides, or guide rods and linear bearings. A reciprocating slide 21 is mounted on the linear guide assembly 1, and a mounting base for the measuring component 2 is fixed on the slide 21. The mounting base for the measuring component 2 includes a swing angle fine-tuning mechanism and an eccentricity fine-tuning mechanism. The dial indicator 22 is detachably fixed to the mounting base for the measuring component 2, with its measuring axis perpendicular to the extension direction of the guide assembly and pointing towards the surface being measured. The slide 21 reciprocates linearly along the guide assembly, carrying the dial indicator 22 to perform a linear scan along a predetermined path.

[0038] The vertical sidewall of the groove provided on the first reference surface 300 is defined as the third reference surface 500; The outer surface of the linear guide component 1 is defined as the fourth reference surface 600, and its bottom surface that contacts the short support 102 is defined as the fifth reference surface 700. Among them, based on the full length of each reference plane, the perpendicularity between the first reference plane 300 and the third reference plane 500, between the fourth reference plane 600 and the fifth reference plane 700, and between the first reference plane 300 and the fourth reference plane 600 is less than 0.01; and within any 300mm sampling length, it is not greater than 0.006mm.

[0039] To ensure safety during operation and ease of maintenance, the short support 102 is equipped with limiting components 5 at both ends of the guide assembly: cover is installed at both ends of the guide assembly, and the cover is detachably fixed to the guide assembly by positioning pins and fastening screws; a stop block is provided on the inner side of the cover to contact the end of the slide 21, which is used to limit the stroke of the slide 21 and prevent it from falling out. The stop block is connected to the cover as a replaceable part.

[0040] In one preferred embodiment, the mounting base of the measuring component 2 and the slide 21 are hinged together by a pivot / rotary plate connector. The rotation axis of the connector is parallel to the extension direction of the linear guide assembly 1, allowing the dial indicator 22 to rotate around this axis within a predetermined angle range. The rotary plate is provided with angle graduations and a locking mechanism for locking at different angle positions to ensure that the dial indicator 22 maintains a stable posture after being adjusted to the target angle, thereby enabling measurement of different in-plane directions of the measured part under the same installation state.

[0041] The following is a description of the working conditions of the shape accuracy detection device for key structural components in machining centers according to this utility model: During clamping, the testing device fits against the measured structural component 200 via the first reference surface 300 of the longitudinal support 101, and is connected and aligned using fasteners through the mounting groove 3 and the waist-shaped mounting hole 4, establishing a stable and reproducible clamping reference on the workpiece. The hollowed-out mesh rib structure and inner corner ribs provide overall rigid constraints, ensuring the stability of the device's posture under clamping force and preventing significant deformation due to stress.

[0042] During measurement, after clamping, the linear guide assembly 1 carried by the short support 102 provides a single-degree-of-freedom linear motion constraint. The slide 21 reciprocates on the guide assembly 1, and the dial indicator 22, under the action of the pre-tightened probe, continuously contacts the surface being measured and performs continuous sampling. The covers and stops at both ends of the limiting member 5 limit the travel of the slide 21 to prevent overtravel and probe damage. The orthogonality between the guide extension direction and the reference plane of the L-shaped support 100 ensures that the measurement path is bound to the workpiece reference system, thereby improving the repeatability and consistency of the data.

[0043] Under adjustment conditions, for situations requiring testing in different measurement directions, the rotary shaft / rotary plate connector between the mounting base of measuring component 2 and the slide 21 allows the dial indicator 22 to be angled in the vertical plane of the linear guide direction. The operator can adjust it to the target direction according to the angle scale and fix it with the locking mechanism to maintain the dial indicator 22 in a stable posture at the new angle. This structure enables in-plane multi-directional measurement under the same clamping state, reducing the steps of repeated disassembly and recalibration, and improving the efficiency and applicability of on-site testing.

[0044] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A device for detecting the shape accuracy of key structural components in a machining center, characterized in that, Includes an L-shaped bracket (100), a linear guide assembly (1), and a measuring component (2); The L-shaped bracket (100) includes an integrally formed longitudinal bracket (101) and a short bracket (102), the longitudinal axes of which are perpendicular to each other, and both are columnar rigid members with rectangular cross sections. The longitudinal support (101) includes a first reference surface (300) for engaging with the structure under test (200). The short-range support (102) includes a second reference surface (400) opposite to the measured structural member (200) and a side surface adjacent to the second reference surface; The linear guide assembly (1) is disposed on at least one side adjacent to the second reference plane (400); The measuring component (2) is slidably mounted on the linear guide assembly (1); The extension direction of the linear guide assembly (1) is perpendicular to the longitudinal direction of the long support (101) and parallel to the longitudinal direction of the short support (102).

2. The detection device as described in claim 1, characterized in that, The non-first reference surface (300) of the L-shaped bracket (100) and the mounting surface of the non-linear guide component (1) are hollowed-out mesh rib structure; The hollowed-out mesh rib structure includes a peripheral frame and staggered ribs arranged therein, with an array of openings between adjacent ribs, and the ribs and the peripheral frame are integrally formed.

3. The detection device as described in claim 1, characterized in that, The first reference surface (300) has an installation groove (3); The vertical sidewall of the groove is defined as the third reference surface (500), the outer side of the linear guide assembly (1) is defined as the fourth reference surface (600), and the bottom surface of the assembly that contacts the short support (102) is defined as the fifth reference surface (700). Each reference plane satisfies at least one of the following conditions: 1) The perpendicularity between the first datum plane (300) and the third datum plane (500) is less than 0.01 over the entire length of each datum plane. 2) The perpendicularity between the first datum plane (300) and the fifth datum plane (700) is less than 0.01 over the entire length of each datum plane; 3) The perpendicularity between the first datum plane (300) and the fourth datum plane (600) is less than 0.01 over the entire length of each datum plane; 4) The difference between the first datum plane (300) and the third datum plane (500) / the fourth datum plane (600) and the fifth datum plane (700) / the first datum plane (300) and the fourth datum plane (600) shall not exceed 0.006 mm within any 300 mm sampling length.

4. The detection device according to claim 3, characterized in that, The mounting groove (3) is at least one of a straight adjustment groove, an arc adjustment groove or a T-shaped groove, and the mounting groove (3) is provided with a waist-shaped mounting hole (4).

5. The detection device as described in claim 1, characterized in that, The detection device also includes a limiting member (5), which includes a cover disposed at opposite ends of the linear guide assembly (1), and each cover is detachably fixed to the linear guide assembly (1) by a positioning pin and a fastening screw. The inner side of the cover is provided with a stop block that abuts against the end of the slide (21), and the stop block is a replaceable part.

6. The detection device as described in claim 1, characterized in that, The measuring component (2) includes a slide (21) disposed along the linear guide assembly (1) and a dial indicator (22) detachably connected to the slide (21); The slide block (21) and the linear guide assembly (1) are slidably connected and can reciprocate. The dial indicator (22) is detachably fixed to the mounting base of the measuring component (2), and the measuring axis of the dial indicator (22) is perpendicular to the extension direction of the linear guide assembly (1).

7. The detection device as described in claim 6, characterized in that, The dial indicator (22) has a spring-preloaded probe end.

8. The detection device as described in claim 6, characterized in that, The mounting base of the measuring component (2) includes a swing angle fine adjustment mechanism and an eccentricity fine adjustment mechanism; The swing angle fine adjustment mechanism and the eccentric fine adjustment mechanism are locked by independent locking components.

9. The detection device as described in claim 6, characterized in that, The measuring component (2) mounting base and the slide (21) are hinged together by a rotating shaft or a turntable connector. The rotation axis of the connector is parallel to the extension direction of the linear guide component (1), so that the dial indicator (22) can rotate around the rotation axis within a predetermined angle range. The turntable is provided with an angle scale and a locking mechanism for locking at different angle positions.

10. The detection device as described in claim 1, characterized in that, The linear guide assembly (1) is a quick-change guide module, which is compatible with at least one of linear guide rail and slider, dovetail slide or guide rod and linear bearing.

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