Shaft part inspection device and inspection method

Abstract

The invention relates to the technical field of shaft part detection, and provides a shaft part size inspection device and method.The inspection device comprises a clamping assembly, the clamping assembly comprises a first clamping piece and a second clamping piece, the two clamping pieces are each provided with a tip end and are oppositely arranged to form a clamping area, the two ends of a to-be-detected piece abut against the two tip ends respectively, and the two ends of the to-be-detected piece abut against the first clamping piece and the second clamping piece respectively; the to-be-tested piece is located in the clamping area; and the detection assembly is arranged on one side of the clamping assembly and comprises at least one detection piece, one detection piece is an overall dimension detection piece suitable for detecting the overall dimension of the to-be-detected piece, and the other detection piece is a structural dimension detection piece suitable for detecting the structural dimension of the to-be-detected piece. The clamping assembly and the detection assembly are arranged, the two ends of the to-be-detected piece abut against the two tip ends so that the to-be-detected piece can be located in the clamping area, and the detection assembly comprises an overall dimension detection piece and a structural dimension detection piece and can detect the overall dimension and the structural dimension of the to-be-detected piece.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft part dimension detection, and in particular to an automatic inspection device and method for axial and radial dimensions of shaft parts. Background Art

[0002] Common shaft parts need to be measured and inspected during their manufacturing process to ensure quality, mainly axial dimensions such as total length, groove width, step length, etc., and radial dimensions such as diameter, radial runout, cylindricity, etc. At present, the inspection of length and diameter of domestic shaft products is mainly completed manually using various length gauges (or height gauges), diameter gauges, micrometers (or dial indicators), etc. The existing pain points are: insufficient data electronicization, unstable operating techniques during length measurement, poor position consistency of diameter measurement, incomplete data collected, radial runout and cylindricity, and the inclusion of interference noise.

[0003] A stepped shaft runout inspection device and detection method is disclosed in the prior art, with publication number CN107202561A, which discloses the deployment of multiple dial indicators (or micrometers) to simultaneously measure the form and position tolerances (such as end face runout, radial runout, etc.) of the stepped shaft. The stepped shaft needs to be driven to rotate for data collection, but in the process of switching the measurement points, the consistency of the sensor contact position and state cannot be maintained, and the rotational error cannot be eliminated. The data obtained by this contact measurement is not reliable enough.

[0004] A tool for measuring the mid-diameter runout of a precision bolt thread is disclosed in the prior art, and its publication number is CN207881584U. However, the device can only measure the mid-diameter runout. The bolt to be measured needs to be rotated one circle by the tool to observe the change in the pointer of the dial indicator as the runout. Digital measurement data cannot be obtained in real time, and random errors are inevitably caused by the contact state and rotation posture of the dial indicator and the product to be measured.

[0005] The above-mentioned inspection device cannot perform all-round, stable and reliable measurement of the dimensions of shaft parts, so an inspection device is urgently needed. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the inspection device in the prior art cannot perform all-round, stable and reliable measurement of the dimensions of shaft parts, thereby providing an inspection device and an inspection method.

[0007] A shaft parts inspection device comprises a frame, and arranged on the frame: a clamping assembly, comprising a support seat and a first clamping member, a second clamping member and a clamping drive member arranged on the support seat, wherein the first clamping member and the second clamping member both have a top end, and the two top ends are suitable for being arranged relative to each other to form a clamping area, and the two ends of the workpiece to be tested are respectively abutted against the two top ends so that the workpiece to be tested is located in the clamping area, and the power output end of the clamping drive member is connected to the first clamping member; a detection assembly, arranged on one side of the clamping assembly, the detection assembly comprises at least one detection member, wherein one of the detection members is a contour size detection member, suitable for detecting the contour size of the workpiece to be tested, and the other detection member is a structural size detection member, Suitable for detecting the structural dimensions of the workpiece to be tested; a linear guide rail is arranged on the frame, and the clamping assembly is arranged on the linear guide rail; the inspection device has the support seat driving the first clamping member, the second clamping member and the clamping drive member to move along the linear guide rail, and the clamping drive member drives the first clamping member to rotate, driving the workpiece to be tested to perform rotational movement in the clamping area, so that the workpiece to be tested performs linear and rotational movement, so that the contour dimension detection member can obtain the first detection state of the contour dimension of the workpiece to be tested, and the clamping drive member drives the first clamping member to rotate, driving the workpiece to be tested to perform rotational movement in the clamping area, so that the structural dimension detection member can obtain the second detection state of the structural dimension of the workpiece to be tested.

[0008] Optionally, in the above-mentioned shaft parts inspection device, the clamping assembly also includes a clamping mounting seat, the clamping mounting seat is arranged on the frame, a receiving groove is opened on the clamping mounting seat, the second clamping member is arranged in the receiving groove to be connected with the main body sleeve of the second clamping member, and the second tip end of the second clamping member is located outside the receiving groove.

[0009] Optionally, in the above-mentioned shaft parts inspection device, the clamping assembly also includes a clamping member, which is arranged on the support seat and located on one side of the clamping mounting seat. The power output end of the clamping member is suitable for abutting against the clamping mounting seat to apply axial pressure to the clamping mounting seat. Under the action of the axial pressure, the clamping mounting seat is suitable for carrying the second top end to move toward the test piece.

[0010] Optionally, in the above-mentioned shaft parts inspection device, the contour dimension detection component is a linear array camera; the detection component also includes an optical component, which is arranged between the contour dimension detection component and the part to be tested.

[0011] The detection component further includes a light source component, and the light source component is arranged on the other side of the workpiece to be detected relative to the contour dimension detection component.

[0012] Optionally, in the above-mentioned shaft parts inspection device, the detection component also includes a first posture adjustment component, which is arranged on the frame, and the contour dimension detection component is arranged on the first posture adjustment component, and the position of the contour dimension detection component relative to the workpiece to be tested is adjusted by the first posture adjustment component.

[0013] Optionally, in the above-mentioned shaft parts inspection device, the first posture adjustment component adopts an electric two-dimensional translation table or a manually adjusted translation table.

[0014] Optionally, in the above-mentioned shaft parts inspection device, the structural dimension detection component adopts a confocal displacement sensor; and / or the detection component also includes a second posture adjustment component, which is arranged on the frame, and the structural dimension detection component is arranged on the frame through the second posture adjustment component.

[0015] Optionally, in the above-mentioned shaft parts inspection device, the linear guide includes at least one first guide rail and a first slider adapted to the first guide rail, the support seat is connected to the first guide rail through the slider, and the support seat is configured to be suitable for moving along the first guide rail under the drive of the first slider, so that the test piece can reciprocate relative to the contour dimension detection piece.

[0016] Optionally, the above-mentioned shaft parts inspection device also includes a second guide rail slider group, which is arranged on the linear guide rail, the second guide rail slider group includes a second guide rail and a second slider adapted to the second guide rail, the second guide rail is arranged on the frame, the clamping drive member and the clamping mounting seat are connected to the second guide rail through the second slider, and are configured to be suitable for moving along the second guide rail under the drive of the second slider.

[0017] A method for inspecting shaft parts, the method is suitable for inspecting shaft parts using an inspection device, the inspection device comprising a frame, and:

[0018] A clamping assembly, comprising a support seat and a first clamping member, a second clamping member and a clamping driving member arranged on the support seat, wherein the first clamping member and the second clamping member both have a top end, the two top ends are suitable for being arranged opposite to each other to form a clamping area, two ends of the workpiece to be tested are respectively abutted against the two top ends so that the workpiece to be tested is located in the clamping area, and a power output end of the clamping driving member is connected to the first clamping member;

[0019] A detection component is arranged on one side of the clamping component, and the detection component includes at least one detection member, wherein one of the detection members is a contour size detection member, suitable for detecting the contour size of the object to be detected;

[0020] A linear guide rail is arranged on the frame, and the clamping assembly is arranged on the linear guide rail;

[0021] The inspection device comprises the support seat driving the first clamping member, the second clamping member and the clamping driving member to move along the linear guide rail, and the clamping driving member driving the first clamping member to rotate, driving the workpiece to be tested to rotate in the clamping area, so that the contour dimension detection member can obtain a first detection state of the contour dimension of the workpiece to be tested, and the clamping driving member driving the first clamping member to rotate, driving the workpiece to be tested to rotate in the clamping area, so that the structural dimension detection member can obtain a second detection state of the structural dimension of the workpiece to be tested;

[0022] The inspection method comprises:

[0023] S01: Loading, the loading includes the following two situations:

[0024] Case (1): Loading of parts to be tested of different lengths (including loading during the first part inspection);

[0025] Case (2): Loading of test pieces of the same length;

[0026] For the above situation (1) when loading parts of different lengths: because the length of the target workpiece to be tested is different from the length of the previous workpiece to be tested, it is necessary to adjust the distance between the second top end and the first top end;

[0027] For situation (2): when loading parts of the same length, it is not necessary to adjust the clamping seat to move along the second guide rail. It is only necessary to operate the clamping cylinder to retract the movable rod of the clamping cylinder so that the clamping seat can move freely. Align the top hole of one end of the workpiece to be tested with the first top end and let the top end be inserted into the hole to fit the conical surface. Then align the top hole of the other end of the workpiece to be tested with the second top end and push the clamping seat to insert the second top end into the top hole of the workpiece to be tested and fit the conical surface. Then operate the push rod of the clamping cylinder to extend until the extended part of the cylinder tightly presses against the back plate of the clamping seat, thereby completing the clamping and fixing of the workpiece to be tested.

[0028] S02: Macro scanning: The linear motion module starts to move quickly with the workpiece to be tested, so that the entire workpiece to be tested stops moving after being scanned by the contour size detection component, and the contour image of the entire workpiece to be tested is obtained for post-processing;

[0029] S03: Position calibration: Based on the macroscopic profile image obtained in the previous step, the positions of the head and tail end faces of the test piece can be detected. Based on the distance of a certain microscopic position to be tested on the test piece relative to the head and tail, the actual physical position of each microscopic position to be tested on the test piece in the current coordinate system can be calculated;

[0030] S04: Microscopic scanning: At the stop position of the previous step, move to the physical positions of the microscopic test positions that need to be inspected for radial runout, roundness and cylindricity in sequence, drive the first clamping member and the second clamping member to rotate the test piece, and obtain a collection of radial images of each test position at different rotation angles based on the contour dimension inspection module;

[0031] S05: Structural scanning: Move to the physical position of the specific structure of the object to be tested in sequence, drive the first clamping member and the second clamping member to drive the object to be tested to rotate, and obtain the relative depth change data diagram of the structure at that location based on the structural dimension detection member;

[0032] S06: Unloading the test piece: After obtaining various image data, process and analyze them, and move to the unloading position at the same time. First, hold the test piece with your left hand, and then operate the tightening cylinder. The extended part of the cylinder retracts and separates from the back plate of the clamping mount. At the same time, the clamping mount can be pushed away with the right hand to separate from the test piece, so as to remove the test piece.

[0033] S07: Display and storage: Display the analyzed dimensional measurement data in accordance with the specifications, and store product images and data in a storage device.

[0034] The technical solution of the present invention has the following advantages:

[0035] 1. The clamping assembly of this device can complete the measurement and inspection of the outline and structural dimensions of the parts by loading and clamping once, which is simple to operate and greatly improves the inspection efficiency;

[0036] 2. The tail clamping assembly of this device can be used to clamp products of different lengths and meet the diverse needs of parts measurement and inspection;

[0037] 3. The inspection device and inspection method are used to inspect shaft parts, and the measurement is more reliable and stable, which solves the difficult and painful problems of quality assurance in the production process of shaft parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a schematic diagram of the overall structure of the inspection device provided in the first embodiment of the present invention clamping the workpiece to be tested;

[0040] Figure 2 for Figure 1An enlarged schematic diagram of the structure at A shown;

[0041] Figure 3 for Figure 1 An enlarged schematic diagram of the structure at B shown;

[0042] Figure 4 It is a schematic diagram of the structure of the structural dimension detection part and the second posture adjustment part;

[0043] Figure 5 It is a schematic diagram of the structure of the detection component;

[0044] Figure 6 is a schematic diagram of the position structure of the second clamping member and the pressing member;

[0045] Figure 7 This is a schematic diagram of the inspection device structure;

[0046] Figure 8 for Figure 7 Schematic diagram from another angle;

[0047] Fig. 9 is a schematic structural diagram of a device under test in a first embodiment;

[0048] Fig.10 is a schematic diagram of a receiving slot on a clamping mounting seat;

[0049] Fig.11 It is a step diagram of the dimension inspection method of shaft parts in Example 2;

[0050] Description of reference numerals:

[0051] 100, rack;

[0052] 200, clamping assembly;

[0053] 210, first clamping member; 211, first top end;

[0054] 220, second clamping member; 221, second top end; 222, body;

[0055] 230, clamping driving member; 240, clamping mounting seat; 241, receiving groove; 250, tightening member; 260, tightening seat;

[0056] 300, detection component;

[0057] 310, outline dimension detection part; 320, structural dimension detection part; 330, first posture adjustment part; 340, second posture adjustment part;

[0058] 350, Optical parts;

[0059] 360, light source;

[0060] 410, support seat; 420, second guide rail slider group; 430, linear guide rail;

[0061] 500. Parts to be tested. DETAILED DESCRIPTION

[0062] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0066] Example 1

[0067] This embodiment describes a shaft parts inspection device that can inspect the outline dimensions and structural dimensions of shaft parts. Figure 1-Figure 9The inspection device includes a frame 100, and a clamping assembly 200 and a detection assembly 300 arranged on the frame 100, wherein the clamping assembly 200 is suitable for clamping a workpiece 500 to be tested, and includes a first clamping member 210, a second clamping member 220 and a clamping driving member 230, the first clamping member 210 and the second clamping member 220 both have top ends, which are respectively defined as a first top end 211 and a second top end 221, the first top end 211 and the second top end 221 are arranged opposite to each other to form a clamping area, and the two ends of the workpiece 500 to be tested are respectively abutted against the first top end 211 and the second top end 221, so that the workpiece 500 to be tested is located in the clamping area. In the region, the power output end of the clamping driving member 230 is connected to the first clamping member 210, and the clamping driving member 230 is used to drive the first clamping member 210 to rotate, so as to drive the test piece 500 to rotate through the first tip end 211, thereby achieving the effect of linear motion and rotational motion of the test piece 500. The detection component 300 is arranged on one side of the clamping component 200, and the detection component 300 includes a plurality of detection components, one of which is arranged as a contour dimension detection component 310 to detect the contour dimension of the test piece 500, and the other detection component is arranged as a structural dimension detection component 320 to detect the structural dimension of the test piece 500.

[0068] In actual use, the inspection device has a first detection state and a second detection state. In the first detection state, the support seat 410 in this embodiment is driven by an external force to drive the first clamping member 210, the second clamping member 220 and the clamping drive member 230 to move along the linear guide rail 430, and the clamping drive member 230 drives the first clamping member 210 to rotate, driving the workpiece 500 to rotate in the clamping area. During the reciprocating movement of the first clamping member 210, the second clamping member 220 and the clamping drive member 230 along the linear guide rail 430, the contour dimension detection member 310 detects the contour of the workpiece 500 to be tested, and then uses the clamping drive member 230 to drive the first clamping member 210 to rotate, so that the workpiece 500 to be tested can rotate a certain angle, and then the contour dimension detection member 310 detects the contours of other parts of the workpiece 500 to be tested, thereby completing the detection of the contour dimension of the workpiece 500 to be tested.

[0069] In the second detection state, the clamping driving member 230 in this embodiment drives the first clamping member 210 to rotate, driving the test piece 500 to rotate, so that the structural dimension detection member 320 can obtain the structural dimension of the test piece 500.

[0070] In actual use, the inspection device can detect the contour dimensions of the test piece 500. When it is necessary to detect the structural dimensions of the test piece 500, the inspection device is in the second detection state. At the same time, when multiple structural dimensions of the test piece 500 are detected, the support seat moves along the linear guide rail to correspond the structural dimensions that need to be detected on the test piece to the position of the structural dimension detection component 320, thereby completing the detection of the structural dimensions of the test piece 500.

[0071] By arranging a clamping assembly and a detection assembly on the frame, wherein the clamping assembly includes a first clamping member and a second clamping member, both of which have top ends arranged oppositely, and the two top ends are arranged oppositely to form a clamping area, and the two ends of the workpiece to be tested are abutted against the two top ends, so that the workpiece to be tested can be located in the clamping area, and the power output end of the clamping drive is connected to the first clamping member, the detection assembly includes a contour size detection member and a structural size detection member, and the support seat in the clamping assembly drives the first clamping member, the second clamping member and the clamping drive member to move along the linear guide rail, so that the contour size detection member can obtain the contour size of the workpiece to be tested, so that the inspection device has a first In the detection state, in the first detection state, the inspection device is used to detect the contour dimensions of the workpiece to be tested, and when it is necessary to detect the structural dimensions of the workpiece to be tested, the inspection device is in the second detection state. In the second detection state, the clamping drive drives the first clamping member to rotate to drive the workpiece to be tested to rotate in the clamping area. During this process, the structural dimension detection member can detect the structural dimensions of the workpiece to be tested, and the clamping assembly can stably clamp the workpiece to be tested. After clamping is completed, the detection assembly is used to detect and obtain the contour dimensions and structural dimensions of the workpiece to be tested. The measurement process is easy to operate, and the dimensions of shaft parts can be measured in an all-round, stable and reliable manner.

[0072] It should be noted that the structural dimensions of shaft parts have a certain length (distributed in the axial direction), so it is necessary to first move along the axial direction of the part so that the structure of the part to be tested faces the structural dimension detection part 320, obtain part of the structural dimensions, and then move along the X direction (that is, the axial direction of the part) to obtain another part of the structural dimensions, until all the structural parts are scanned, and all the structural dimensions can be calculated. Therefore, in the actual detection process, the inspection device in this embodiment can not only complete the rotation measurement at a single axial position, but also complete the rotation measurement at multiple X-direction (that is, the axial direction of the part) positions.

[0073] In this embodiment, in order to further improve the stability of the linear motion and rotational motion processes, the above-mentioned clamping assembly 200 also includes a clamping mounting seat 240, which is set on the support seat, and a receiving groove 241 is opened on the clamping mounting seat 240. The receiving groove 241 is used to install the main body 222 of the second clamping member 220. The second top end 221 of the second clamping member 220 can be kept coaxial with the first top end 211 of the first clamping member 210 through a positioning pin and a position adjustment screw. The second clamping member 220 is set in the receiving groove 241, and the second top end 221 of the second clamping member 220 is located outside the receiving groove 241, and is sleeved and connected with the main body 222 of the second clamping member 220.

[0074] This arrangement can ensure that the shaft parts are stably clamped, and the axis of the shaft parts is coaxial with the axis of the first tip end 211 and the second tip end 221, so the measurement is more accurate.

[0075] See also Figure 2 and Figure 3 The second clamping member 220 includes a body 222 and a second tip 221. The second tip 221 is sleeved on the body 222 of the second clamping clamp. The body 222 is arranged in the accommodating groove 241. The two side surfaces of the body 222 are connected to the clamping mounting seat 240 through fasteners.

[0076] In order to further improve the clamping stability of the workpiece 500 to be tested, the above-mentioned clamping assembly 200 also includes a clamping member 250, which is arranged on the support seat and located on one side of the clamping mounting seat 240, and the power output end of the clamping member 250 is suitable for abutting against the clamping mounting seat 240 to apply axial pressure to the clamping mounting seat 240. Under the action of the axial pressure, the clamping mounting seat 240 is suitable for carrying the second top end 221 to move toward the workpiece 500 to be tested. After the top ends corresponding to the first clamping member 210 and the second clamping member 220 clamp the workpiece 500 to be tested, the clamping mounting seat 240 is used to apply axial pressure to the clamping mounting seat 240, so that the clamping mounting seat 240 can move with the second clamping member 220 toward the workpiece 500 to achieve the effect of approaching the first clamping member 210, thereby increasing the clamping force on the workpiece 500 to be tested and improving the clamping stability of the workpiece 500 to be tested.

[0077] In actual use, the tightening member 250 may be a tightening cylinder, which is disposed on the support seat via a tightening seat 260 .

[0078] The detection component 300 in this embodiment also includes a first posture adjustment member 330 and a second posture adjustment member 340. The first posture adjustment member 330 is used to adjust the spatial position of the contour dimension detection member 310 relative to the object to be tested 500, and the second posture adjustment member 340 is used to adjust the spatial position of the structural dimension detection member 320 relative to the object to be tested 500.

[0079] Specifically, the first posture adjustment member 330 is arranged on the frame 100, and the contour dimension detection member 310 is arranged on the first posture adjustment member 330, and the first posture adjustment member 330 is arranged on the first posture adjustment member 330 through the first mounting bracket to adjust the position and posture of the contour dimension detection member 310 in space, thereby achieving the effect of adjusting the spatial position of the contour dimension detection member 310 relative to the workpiece to be tested 500, so that the center line of the field of view of the contour dimension detection member 310 is perpendicular to the central axis of the top system, thereby improving the measurement accuracy of the overall structure, expanding the detection field of view, and the inspection device can cover parts of various diameters.

[0080] In this embodiment, in actual use, the contour dimension detection component 310 can adopt a linear array camera, the lateral resolution of the output image of the linear array camera is 16K (16384) pixels, the imaging resolution is ≤5um, the maximum measurable part diameter is 80mm (accounting for 97.7% of the full field of view), and the contour output frequency in the online trigger working mode is ≥100k Hz.

[0081] The detection assembly 300 of this embodiment further includes an optical component 350, which is mounted on the first posture adjustment component 330 and arranged on the optical path of the detection signal transmission. Figure 5 The optical component 350 is mounted on the adjustment seat of the first posture adjustment component 330 through the second mounting bracket and the third mounting bracket. The second mounting bracket and the third mounting bracket can support and fix the telecentric lens with a larger mass. The third mounting bracket is used for support, and the second mounting bracket is used for fixing the middle part. Then the line array camera is set above the optical component 350. In actual use, the optical component 350 can use a telecentric lens with an effective resolution better than 5um, which matches the imaging resolution, and its edge distortion should be <0.1% (that is, the central distortion-free area accounts for more than 99.9%).

[0082] The first posture adjustment member 330 in this embodiment includes an angle adjustment ring, which is arranged on the first mounting bracket so that the line array camera is fixed on the first posture adjustment member 330. By adjusting the angle adjustment ring, the distance and angle of the line array camera relative to the center axis of the top can be adjusted, so that the center line of the camera sensor is perpendicular to the center axis of the top and the center axis of the top is located at the center of the camera field of view.

[0083] In this embodiment, a bracket posture adjustment member may be provided between the second mounting bracket and the third mounting bracket to adjust the rotation of the first mounting bracket and the second mounting bracket so that the telecentric lens can follow the rotation angle of the linear array camera.

[0084] The structural dimension detection part 320 in this embodiment is arranged on the second posture adjustment part 340, and the structural dimension detection part 320 in this embodiment can adopt a confocal displacement sensor to detect the relative height or depth of special structures on the surface of the test piece 500, typically axial splines, threads, keyways and other structures. The confocal method can obtain precise distance that is not affected by the material of the parts.

[0085] Specifically, the second posture adjustment component 340 in the present embodiment can adopt an electric two-dimensional displacement table, and the number is set to two. Of course, other types of displacement adjustment components can also be used, such as a six-axis displacement table, which can adjust the X, Y, and Z positions of the structural dimension detection component 320 relative to the component to be measured 500 so that it meets the distance requirements of structural measurement. It can be adjusted to adapt to parts of different lengths and diameters so that the structural parts of the parts correspond to the structural dimension detection component 320, so as to realize real-time detection of the posture of the structural dimension detection component 320.

[0086] Of course, when cost factors are given priority, the structural dimension and posture adjustment member in this embodiment may also adopt a manual adjustment platform.

[0087] In order to provide lighting for the linear camera during the detection process, the detection component 300 in the present embodiment further includes a light source component 360. The light source component 360 is disposed on the other side of the workpiece 500 to be tested relative to the contour dimension detection component 310. The light source component 360 is disposed on the adjustment seat of the first posture adjustment component 330. The light source component 360 is used to illuminate from bottom to top, and the light is output parallel to the camera sensor line (and perpendicular to the center axis of the part). The workpiece 500 itself forms a dark area in the image, and a bright area is formed outside the workpiece 500. In actual use, the light source component 360 can use high-brightness green linear coaxial light and its light source controller.

[0088] The linear guide rail 430 in this embodiment includes at least one first guide rail and a first slider adapted to the first guide rail. The support seat is connected to the first guide rail through all the first sliders, and the support seat is configured to be suitable for moving along the first guide rail under the drive of the first slider, so that the workpiece 500 to be tested can reciprocate relative to the contour dimension detection part 310 and the structural dimension detection part 320, thereby completing the detection of the contour and structural dimension of the workpiece 500 to be tested.

[0089] In this embodiment, a second guide rail slider group 420 is also included, and the second guide rail slider group 420 is arranged on a support seat. The second guide rail slider group 420 includes a second guide rail and a second slider adapted to the second guide rail. The second guide rail is arranged on the support seat, and the clamping drive member 230 and the clamping mounting seat 240 are both connected to the second guide rail through the second slider, and are configured to be suitable for moving along the second guide rail under the drive of the second slider.

[0090] In actual use, the clamping mount 240 can reciprocate along the support seat driven by the second guide rail slider group 420, and the support seat can reciprocate along the frame 100 driven by the linear guide rail.

[0091] It should be noted that the clamping drive member 230 is fixed at one end of the support seat 410 so that the clamping drive member 230 is fixed relative to the support seat 410, and the clamping mounting seat 240 is arranged at the tail of the support seat 410 as a movable fixed seat, which can move left and right on the second guide rail to adapt to the clamping of parts of different lengths.

[0092] See also Figure 6 The second guide rail slider group 420 includes two second guide rails arranged in parallel and a plurality of second sliders respectively arranged on the second guide rails. A corresponding number of second sliders are arranged at the bottom of the clamping drive member 230 and the clamping mounting seat 240. The second sliders slide relative to the second guide rails to adjust the position of the clamping mounting seat 240 relative to the detection member, thereby achieving a more convenient effect in operating the distance between the first clamping member 210 and the second clamping member 220 when adapting to the test members 500 of multiple specifications and lengths.

[0093] When it is necessary to replace the workpiece to be tested, the output end of the tightening cylinder is loosened to separate it from the clamping mounting seat 240, and then the second sliding block located under the second clamping member is operated to move along the second slide rail, thereby adjusting the distance between the second clamping member and the first clamping member, thereby realizing the replacement of the workpiece to be tested. It should be noted that the replacement process includes the replacement of workpieces to be tested of the same specifications and the replacement of workpieces to be tested of different specifications. For the loading and unloading of products of the same length specifications, only the cylinder needs to be tightened or loosened. When loading products of different lengths (compared with the last time), it is necessary to first adjust the position of the tightening seat 260 on the second guide rail. After the position is locked, the clamping mounting seat 240 is supported by the tightening cylinder to complete the part clamping.

[0094] As another embodiment, a corresponding number of second sliders can be provided below the tightening seat 260. The second sliders can slide along the second guide rail to adjust the position of the tightening seat 260 in coordination with the position of the clamping mounting seat 240. When it is necessary to replace the test piece of other length specifications, the tightening seat 260 can be adjusted to move along the second guide rail, thereby adjusting the distance between the second clamping member and the first clamping member, thereby adapting to the test pieces of different length specifications.

[0095] When the output end of the tightening cylinder does not abut against the clamping mounting seat 240, the position of the clamping mounting seat 240 relative to the clamping driving member 230 can be freely adjusted, thereby achieving the effect of unloading and loading materials.

[0096] In this embodiment, in order to ensure the stability of the position of the clamping seat 260 and thus ensure the stability of part clamping, a pneumatic limiter can be set on the clamping seat 260 corresponding to the second slider. The pneumatic limiter can lock the clamping clamping seat 260 on the second guide rail to prevent the clamping member 250 from moving relative to the second slider, thereby ensuring its clamping stability, and further ensuring that the second clamping end can clamp the workpiece 500 to be tested, and no relative displacement will occur between the two. When it is necessary to replace the workpiece 500 of different specifications and lengths, the locking between the pneumatic limiter and the second guide rail is canceled to allow the clamping clamping seat 260 to move relative to the second guide rail, thereby allowing the workpiece 500 of different specifications and lengths to be replaced.

[0097] It should be noted here that the clamping mounting seat 240 is always sliding and is not locked on the second guide rail. The pressing seat 260 can be locked on the second guide rail, which is equivalent to a limiting mechanism. The pressing member 250 only increases the axial pressure to maintain the clamping state, that is, the pressing seat 260 locks the pressing member 250 to push it out, and the clamping mounting seat 240 presses the test piece.

[0098] The pneumatic limiter may be a pneumatic locking member commonly used in the prior art, and of course, a slider with a pneumatic locking function may also be directly used, which is not limited here and is based on what can be implemented.

[0099] Similarly, the above-mentioned linear guide rail includes two first guide rails arranged in parallel and a plurality of first sliders arranged on the first guide rails. The support seat 410 is connected to the first guide rail through the first slider. The first guide rail is arranged on the frame 100. When the first slider reciprocates along the first guide rail, it can drive the clamping mounting seat 240, the tightening seat 260 and the clamping drive member 230 to move as a whole, thereby adjusting the position of the test piece 500 relative to the detection piece.

[0100] In order to prevent the support seat 410 from reciprocating and moving beyond the measuring range of the grating ruler during the reciprocating movement of the support seat 410, so as to prevent it from moving out of the measurable position range, a limit plate can also be set at both ends of the frame 100. The height of the limit plate must be at least higher than the distance between the bottom of the support seat 410 and the upper surface of the frame 100. When the end of the support seat 410 moves to abut against the limit plate, the limit plate can block the support seat 410, thereby limiting the position of the support seat 410.

[0101] In this embodiment, a zero point indicating sensor can be provided on the body 222 of the clamping driver 230 to detect the initial posture of the test piece 500 during rotation. The rotational vibration of the clamping driver 230 itself should be less than 5 microns without axial movement.

[0102] A zero point sensor is arranged between the two limit plates, one of the two limit plates is used as a positive limit and the other as a negative limit. The zero point sensor is used as a zero point mark to accurately control the moving distance and position of the test piece 500.

[0103] A main scale and a secondary scale of a grating scale are set on the moving path of the test piece 500 to detect the moving distance of the test piece. Multiple test points on the test piece 500 can also be detected, wherein the main scale of the grating scale is flatly attached to the frame and parallel to the linear guide rail, that is, a precision linear slide rail is set, and the secondary scale of the grating scale (reading head) is installed on one side of the guide rail sliding block, opposite to the main scale, to record the physical position of the current moving mechanism, and at the same time, the output signal of the secondary scale of the grating scale (reading head) during movement is used to trigger the linear array camera to collect the image of the moving part.

[0104] Embodiment 2:

[0105] This embodiment describes a method for inspecting the dimensions of shaft parts. The method is suitable for an inspection device of the present invention. The inspection device includes a clamping assembly 200 and a detection assembly 300. The clamping assembly 200 includes a first clamping member 210, a second clamping member 220, and a clamping drive member 230. The first clamping member 210 and the second clamping member 220 both have top ends, the two top ends are respectively a first top end 211 and a second top end 221. The two top ends are suitable for being arranged opposite to each other to form a clamping area. The two ends of the workpiece 500 are respectively connected to the first top end 211 and the second top end 221. The second top end 221 abuts so that the workpiece 500 to be tested is located in the clamping area and is clamped by the first clamping member 210 and the second clamping member 220. The power output end of the clamping drive member 230 is connected to the first clamping member 210. The detection component 300 is arranged on one side of the clamping component 200. The detection component 300 includes at least one detection member, one of which is set as a contour dimension detection member 310 to be suitable for detecting the contour dimension of the workpiece to be tested, and the other detection member can be set as a structural dimension detection member 320 to be suitable for detecting the structural dimension of the workpiece 500 to be tested.

[0106] In actual use, the inspection device has a first detection state and a second detection state. In the first detection state, the support seat 410 in this embodiment is driven by a linear motor to move the first clamping member, the second clamping member and the clamping driver along the linear guide rail, and the clamping driver drives the first clamping member to rotate, driving the test piece to rotate in the clamping area. During the reciprocating movement of the first clamping member 210, the second clamping member 220 and the clamping driver 230 along the linear guide rail 430, the contour dimension detection member 310 detects the contour of the test piece 500, and then uses the clamping driver to drive the first clamping member to rotate so that the test piece 500 can rotate a certain angle, and then the contour dimension detection member 310 detects the contours of other parts of the test piece 500, thereby completing the detection of the contour dimension of the test piece 500.

[0107] The linear motor in this embodiment adopts a magnetic levitation direct-drive linear motor. With the advantage of non-contact between the moving stator and the moving stator, the linear motion of the device is achieved by the electromagnetic force generated between the moving stator.

[0108] In the second detection state, the clamping drive member 230 in this embodiment drives the first clamping member 210 to rotate, driving the test piece 500 to perform linear and rotational motion within the measurement range, so that the structural dimension detection member 320 can obtain the structural dimensions of the test piece 500.

[0109] In actual use, the inspection device can detect the contour dimensions of the test piece 500. When it is necessary to detect the structural dimensions of the test piece 500, the inspection device is in the second detection state. At the same time, when multiple structural dimensions of the test piece 500 are detected, the support seat moves along the linear guide rail to correspond the structural dimensions that need to be detected on the test piece to the position of the structural dimension detection part, thereby completing the detection of the structural dimensions of the test piece.

[0110] See also Fig.10 The shaft parts dimension inspection method in this embodiment includes the following steps:

[0111] S01: Loading: There are two situations:

[0112] Case (1), 500 pieces of test pieces of different lengths are loaded (including loading during the first part inspection);

[0113] Case (2): 500 pieces of the same length of the test pieces are loaded.

[0114] In view of the above situation (1) when loading parts of different lengths: because the length of the target workpiece 500 to be tested is different from the length of the previous workpiece to be tested, it is necessary to adjust the distance between the second top end 221 and the first top end, which is specifically achieved by adjusting the clamping mounting seat 240 to move along the first guide rail under the action of the first slider. Before this, it is necessary to release the limit of the second slider corresponding to the clamping seat 260 so that it can slide freely on the second guide rail, align the top hole of one end of the workpiece 500 with the first top end 211, and then align the top hole of the other end of the workpiece 500 with the second top end. The clamping mount 240 is pushed towards the part and the movable top at the tail is pressed against the center hole of the part. The tightening cylinder is then controlled to extend until the extended part of the tightening cylinder contacts the back plate of the clamping mount 240. At this time, the extended part of the tightening cylinder is completely retracted. The tightening seat 260 is then pushed 5 to 15 mm toward the back plate of the clamping mount 240. The tightening seat 260 is locked to the second guide rail. The tightening cylinder is then operated to extend the movable rod of the cylinder. The extended part tightly presses against the back plate of the clamping mount 240, thereby completing the clamping and fixation of the workpiece 500 to be tested.

[0115] The pushing distance of 5 to 15 mm can be adjusted based on actual conditions to ensure that the parts do not loosen during rotation and rotate synchronously with the first top end 211 of the first clamping member 210 on the clamping drive member 230 .

[0116] For situation (2): when loading parts of the same length, it is not necessary to adjust the clamping seat 260 to move along the second guide rail (keep its position on the second guide rail unchanged). It is only necessary to operate the clamping cylinder to retract the movable rod of the clamping cylinder so that the clamping seat 240 can move freely, align the top hole of one end of the workpiece to be tested with the first top end 211 and allow the top end to fit the conical surface in the hole, then align the top hole of the other end of the workpiece to be tested 500 with the second top end 221 and push the clamping seat 240 so that the second top end 221 is inserted into the top hole of the workpiece to be tested 500 and fits the conical surface, then operate the clamping cylinder push rod to extend until the extended part of the cylinder tightly presses against the back plate of the clamping seat 240, thereby completing the clamping and fixing of the workpiece to be tested 500.

[0117] S02: Macro scanning: The linear motion module starts to move quickly with the test piece 500, so that the entire test piece 500 stops moving after being scanned by the contour size detection component, and obtains the contour image of the entire test piece 500 (including the tops at both ends) for post-processing.

[0118] S03: Position calibration: Based on the macro-contour image obtained in the previous step, the positions of the head and tail end faces of the test piece 500 can be detected. Based on the distance of a certain microscopic position to be measured on the test piece 500 (such as the relative axial position of the end face of the diameter or radial runout to be measured, the relative axial position of the spline or keyway structure to be measured) relative to the head and tail, the actual physical position of each microscopic position to be measured on the test piece 500 in the current coordinate system can be calculated.

[0119] Among them, in S03, the reason why position calibration is needed is that the axial pressure may be different in each clamping state, and the end face of the part will have microscopic position changes on the linear guide. The calibration process is to obtain the actual physical precise position through the precise position in the image, so as to ensure that the size of the same part is measured each time, ensuring the reliability and consistency of the data.

[0120] S04: Microscopic scanning: At the stop position of the previous step, move to the physical positions of the microscopic test positions that need to be checked for radial runout, roundness and cylindricity in sequence, drive the first clamp 210 and the second clamp to drive the test piece 500 to rotate, and based on the contour dimension inspection module, obtain a collective image of the radial images at different rotation angles of each test position.

[0121] S05: Structural scanning: Move to the physical positions of specific structures of the test piece 500 (such as radially protruding or recessed splines and keyways) in sequence (the same structural object can have multiple positions to be inspected), drive the first clamping member 210 and the second clamping member 220 to drive the test piece 500 to rotate, and obtain the relative depth change data graph of the structure at that location based on the structural dimension detection member.

[0122] S06: Unloading the test piece 500: After obtaining various types of image data (the entire macroscopic scan image, the collective images of different microscopic positions, the relative depth change data graphs at different structural positions), the data are processed and analyzed, and the test piece 500 is moved to the unloading position at the same time. The test piece 500 is first supported by the left hand, and then the tightening cylinder is operated. The extended part of the cylinder is retracted and separated from the back plate of the clamping mount 240. At the same time, the clamping mount 240 can be pushed away with the right hand to separate from the test piece 500, so as to remove the test piece 500.

[0123] S07: Display and storage: Display the analyzed dimensional measurement data against the specifications, and store product images and data in the storage device. Based on the profile, the axial structural dimensions (total length, step length, angle, groove width, straightness, etc.) and radial related dimensions (such as diameter, diameter fluctuation, arc radius, cylindricity, etc.) can be calculated.

[0124] In particular, when only the basic axial and radial dimensions need to be checked and no dimensions that require rotational measurement, such as end face runout, roundness, cylindricity, and structural dimensions, need to be checked, steps S03 to S05 may not be performed, which is more efficient.

[0125] In particular, for shaft parts without special structures (such as splines), the S05 structural scan can be omitted, thus saving inspection time.

[0126] The S03 position calibration in this method is a key step. After the test piece 500 is globally scanned, the positional relationship between the test piece 500 and the top can be obtained, because the imaging resolution of the contour scanning system is very high, and the subdivision accuracy of the grating ruler is also very high, so that the current position when the contour scanning is completed and stopped (corresponding to the large end of the top in the image) and the distance between the head and tail of the test piece 500 relative to the current position can be obtained. To measure a certain position (or end face) on the test piece 500 (typically the measurement of diameter or radial runout), the distance from the position (or end face) to the head (or tail) must be accurately obtained (generally, the position of the dimension to be controlled must be determined during design). Each time the test piece 500 is loaded and clamped, due to the difference in the clamping force of the double top system, the test piece 500 will have a slight axial position change relative to the top system. Therefore, the real head and tail position must be obtained through the positional relationship between the head and tail end faces of the test piece 500 and the top in the image, and then the actual position of a certain position to be measured on the body of the test piece 500 is obtained.

[0127] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A shaft parts dimension inspection device, characterized in that: It comprises a frame (100), and arranged on the frame (100): A clamping assembly (200) comprises a support seat (410) and a first clamping member (210), a second clamping member (220) and a clamping driving member (230) arranged on the support seat (410), wherein the first clamping member (210) and the second clamping member (220) both have a top end, the two top ends are suitable for being arranged opposite to each other to form a clamping area, two ends of a workpiece (500) to be tested are respectively abutted against the two top ends so that the workpiece (500) to be tested is located in the clamping area, and a power output end of the clamping driving member (230) is connected to the first clamping member (210); A detection component (300) is arranged on one side of the clamping component (200), and the detection component (300) comprises at least one detection member, wherein one of the detection members is a contour dimension detection member (310) suitable for detecting the contour dimension of the object to be detected, and the other detection member is a structural dimension detection member (320) suitable for detecting the structural dimension of the object to be detected; A linear guide rail (430) is arranged on the frame (100), and the clamping assembly (200) is arranged on the linear guide rail (430); The inspection device comprises the support seat (410) driving the first clamping member (210), the second clamping member (220) and the clamping drive member (230) to move along the linear guide rail, and the clamping drive member (230) drives the first clamping member (210) to rotate, driving the workpiece (500) to perform rotational movement in the clamping area, so that the workpiece (500) to perform linear and rotational movement, so that the contour dimension detection member (310) can obtain a first detection state of the contour dimension of the workpiece (500), and the clamping drive member (230) drives the first clamping member (210) to rotate, driving the workpiece (500) to perform rotational movement in the clamping area, so that the structural dimension detection member (320) can obtain a second detection state of the structural dimension of the workpiece (500).

2. The shaft parts dimension inspection device according to claim 1, characterized in that: The clamping assembly (200) further comprises a clamping mounting seat (240), wherein the clamping mounting seat (240) is arranged on the frame (100), and a receiving groove (241) is provided on the clamping mounting seat (240), and the second clamping member (220) is arranged in the receiving groove (241) to be sleeved and connected with the body (222) of the second clamping member (220), and the second top end (221) of the second clamping member (220) is located outside the receiving groove (241).

3. The shaft parts dimension inspection device according to claim 2, characterized in that: The clamping assembly (200) further comprises a pressing member (250) which is arranged on the supporting seat (410) and is located on one side of the clamping mounting seat (240). The power output end of the pressing member (250) is adapted to abut against the clamping mounting seat (240) so as to apply axial pressure to the clamping mounting seat (240). Under the action of the axial pressure, the clamping mounting seat (240) is adapted to carry the second tip end (221) to move toward the test piece (500).

4. The shaft parts dimension inspection device according to claim 3 is characterized in that: The outline dimension detection element (310) is a linear array camera; The detection component (300) further comprises an optical component (350) which is arranged between the contour dimension detection component (310) and the object to be detected (500).

5. The shaft parts dimension inspection device according to claim 4, characterized in that: The detection component (300) further comprises a light source component (360), and the light source component (360) is arranged on the other side of the object to be detected (500) relative to the contour dimension detection component (310).

6. The shaft parts dimension inspection device according to claim 5, characterized in that: The detection assembly (300) further comprises a first posture adjustment member (330) which is arranged on the frame (100); the contour dimension detection member (310) is arranged on the first posture adjustment member (330); and the position of the contour dimension detection member (310) relative to the object to be detected (500) is adjusted by the first posture adjustment member (330).

7. The shaft parts dimension inspection device according to claim 6, characterized in that: The structural dimension detection component (320) adopts a confocal displacement sensor; and / or the detection component further comprises a second posture adjustment component (340) which is arranged on the frame (100), and the structural dimension detection component (320) is arranged on the frame via the second posture adjustment component (340).

8. The shaft parts dimension inspection device according to any one of claims 1 to 7, characterized in that: The linear guide rail (430) includes at least one first guide rail and a first slider adapted to the first guide rail, the support seat (410) is connected to the first guide rail via the first slider, and the support seat (410) is configured to be driven by the first slider to move along the first guide rail, so that the test piece (500) can reciprocate relative to the contour dimension detection piece (310) and the structural dimension detection piece (320).

9. The shaft parts dimension inspection device according to claim 8, characterized in that: It also includes a second guide rail slider group (420) arranged on the support seat (410), the second guide rail slider group (420) includes a second guide rail and a second slider adapted to the second guide rail, the second guide rail is arranged on the support seat (410), the clamping drive member (230) and the clamping mounting seat (240) are connected to the second guide rail through the second slider, and are configured to be suitable for moving along the second guide rail under the drive of the second slider.

10. A method for inspecting the dimensions of shaft parts, characterized in that: The method is suitable for inspecting shaft parts by using an inspection device, wherein the inspection device comprises a frame (100) and a clamping assembly (200) arranged on the frame (100), comprising a support seat and a first clamping member (210), a second clamping member (220) and a clamping drive member (230) arranged on the support seat, wherein the first clamping member (210) and the second clamping member (220) both have top ends, and the two top ends are suitable for being arranged opposite to each other to form a clamping area, and the two ends of the workpiece (500) to be tested are respectively abutted against the two top ends so that the workpiece (500) to be tested is located in the clamping area, and the power output end of the clamping drive member (230) is connected to the first clamping member (210); A detection component (300) is arranged on one side of the clamping component (200), and the detection component (300) comprises at least one detection member, wherein one of the detection members is a contour dimension detection member, suitable for detecting the contour dimension of the object to be detected, and the other detection member is a structural dimension detection member, suitable for detecting the structural dimension of the object to be detected; A linear guide rail is arranged on the frame, and the clamping assembly is arranged on the linear guide rail; The inspection device comprises the support seat driving the first clamping member, the second clamping member and the clamping drive member to move along the linear guide rail, and the clamping drive member (230) drives the first clamping member (210) to rotate, driving the workpiece (500) to perform rotational movement in the clamping area, so that the workpiece (500) to perform linear and rotational movement, so that the contour dimension detection member (310) can obtain a first detection state of the contour dimension of the workpiece (500), and the clamping drive member (230) drives the first clamping member (210) to rotate, driving the workpiece (500) to perform rotational movement in the clamping area, so that the structural dimension detection member (320) can obtain a second detection state of the structural dimension of the workpiece (500); The inspection method comprises: S01: Loading, the loading includes the following two situations: Case (1), loading of test pieces (500) of different lengths (including loading during the first part inspection); Case (2): Loading of the same length of the test piece (500); In the above situation (1) when loading parts of different lengths: because the length of the target test piece (500) to be replaced is different from the length of the previous test piece (500), it is necessary to adjust the distance between the second tip end (221) and the first tip end (211); For situation (2): when loading parts of the same length, it is not necessary to adjust the clamping seat (260) to move along the second guide rail. It is only necessary to operate the clamping cylinder to retract the movable rod of the clamping cylinder so that the clamping seat (240) can move freely, align the top hole of one end of the workpiece to be tested with the first top end (211) and allow the top end to fit the conical surface in the hole, then align the top hole of the other end of the workpiece to be tested (500) with the second top end (221) and push the clamping seat (240) so that the second top end (221) is inserted into the top hole of the workpiece to be tested (500) and fits the conical surface, then operate the push rod of the clamping cylinder to extend until the extended part of the cylinder tightly presses against the back plate of the clamping seat (240), thereby completing the clamping and fixing of the workpiece to be tested (500); S02: Macro scanning: The linear motion module starts to move quickly with the test piece (500), so that the entire test piece (500) stops moving after being scanned by the contour size detection component (310), and obtains a contour image of the entire test piece (500) for post-processing; S03: Position calibration: Based on the macroscopic profile image obtained in the previous step, the positions of the head and tail end surfaces of the test piece (500) can be detected, and based on the distance of a certain microscopic test position on the test piece (500) relative to the head and tail, the actual physical position of each microscopic test position on the test piece (500) in the current coordinate system can be calculated; S04: Microscopic scanning: at the stop position of the previous step, the device moves sequentially to the physical positions of the microscopic positions to be tested where radial runout, roundness and cylindricity need to be checked, and the first clamping member (210) and the second clamping member (220) are driven to rotate the test piece (500), and based on the contour dimension inspection module, a collection of radial images at different rotation angles of each position to be tested is obtained; S05: Structural scanning: sequentially moving to the physical position of the specific structure of the object to be tested (500), driving the first clamping member (210) and the second clamping member (220) to drive the object to be tested (500) to rotate, and obtaining a relative depth change data diagram of the structure at that location based on the structural dimension detection member (320); S06: unloading the test piece (500): after obtaining various types of image data, the data is processed and analyzed, and the test piece (500) is moved to the unloading position. The test piece (500) is first supported by the left hand, and then the tightening cylinder is operated. The extended part of the cylinder is retracted and separated from the back plate of the clamping mounting seat (240). At the same time, the clamping mounting seat (240) can be pushed away by the right hand to separate from the test piece (500), thereby removing the test piece (500); S07: Display and storage: Display the analyzed dimensional measurement data in accordance with the specifications, and store product images and data in a storage device.

Images