A visual inspection fixture for converter sockets

Abstract

This invention relates to the field of visual inspection tooling technology, and more particularly to a visual inspection tooling for converter sockets, including a mounting base. A fixed mounting plate adapted to the converter socket production line is bolted to the lower end of the mounting base, and a glass support plate for placing the converter socket is provided at the top of the mounting base. Based on laser profile measurement technology, this invention uses a high-precision gear linkage mechanism to drive a laser profiler to automatically adjust from 0-180° multi-angle, achieving omnidirectional scanning and inspection of the three-dimensional shape of the bottom of the converter socket. Furthermore, it innovatively constructs a dual-channel inspection system. A high-resolution imaging system based on machine vision is configured in the upper inspection unit, combined with an adaptive illumination compensation algorithm, to accurately acquire the geometric parameters of key parts at the top of the socket. Precision scale markings are introduced in the clamping posts, allowing operators to quickly determine the socket height dimensions through the micron-level scale on the clamping posts, significantly improving inspection efficiency.

Description

Technical Field

[0001] This invention relates to the field of visual inspection tooling technology, and more particularly to a visual inspection tooling for converter sockets. Background Technology

[0002] Converter sockets are mainly used to convert one type of socket into another type of portable socket, primarily for use with a different electrical supply, in order to make electricity use more convenient and safer for people. Tooling and clamping are required during the production process of converter sockets.

[0003] The existing converter socket fixture has the following defects during use:

[0004] The existing converter socket tooling has insufficient compatibility and lacks an adjustable limit mechanism, making it incompatible with the testing requirements of converter sockets of different sizes and models. Furthermore, the existing converter socket tooling has blind spots in its testing dimensions, failing to test the vertical axial parameters in the key dimensions of the product. As a result, the existing converter socket tooling cannot control the full-size quality of converter socket products. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of insufficient compatibility of converter socket tooling specifications and blind spots in the detection dimensions in the prior art, and to propose a visual inspection tooling for converter sockets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A visual inspection fixture for a converter socket includes a mounting base. A fixed mounting plate adapted to the converter socket production line is bolted to the lower end of the mounting base. A glass support plate for placing the converter socket is provided at the top of the mounting base. A first detection part for detecting the bottom contour of the converter socket is provided inside the mounting base. An adjustable limiting part for limiting the position of the converter socket is fixedly provided at the top of the mounting base. A second detection part for detecting the upper part of the converter socket in multiple dimensions is provided on the adjustable limiting part.

[0008] Preferably, the mounting base is a hollow rectangular structure with an open bottom, the cavity formed between the fixed mounting plate and the mounting base has a cross-section in the shape of a circular arch, and both sides of the fixed mounting plate and the mounting base are provided with rectangular bolt fixing plates.

[0009] Preferably, the first detection unit includes:

[0010] The motor is installed in the inner cavity of the mounting base;

[0011] A drive shaft driven by the motor is rotatably mounted in the inner cavity of the mounting base;

[0012] Rotate the mounting shaft installed in the inner cavity of the mounting base;

[0013] A laser profilometer fixedly mounted on the mounting shaft;

[0014] A drive gear fixedly mounted on the drive shaft;

[0015] A driven gear that is fixedly mounted on the mounting shaft.

[0016] Preferably, the adjustable limiting part includes:

[0017] A guide frame fixedly connected to the top of the mounting base;

[0018] Clamping columns are slidably mounted on the guide frame, and four clamping columns are provided;

[0019] A damper fixedly installed between the clamping column and the guide frame;

[0020] The sliding sleeve is fitted onto the connecting plate at the end where the damper connects to the guide frame;

[0021] A buffer spring is fixedly connected between the connecting plate and the guide frame.

[0022] Preferably, the longitudinal section of the clamping column is a right-angled trapezoidal structure, and the four clamping columns are arranged at the four corners of the glass support plate. The end face of the clamping column that abuts against the converter socket is provided with a scale for displaying the height, and the top of the clamping column is provided with a mounting groove for placing and installing the second detection part.

[0023] Preferably, the second detection unit includes:

[0024] Rotate the rotating shaft that is mounted on the inner wall of the mounting groove;

[0025] A mounting gear fixedly installed on the rotating shaft;

[0026] A working groove is formed on the mounting gear;

[0027] A vision inspection module fixedly installed on the working slot;

[0028] A drive rack that is slidably mounted on the inner wall of the mounting groove and meshes with the mounting gear.

[0029] Preferably, a trigger plate is fixedly mounted on the rotating shaft, and a counter corresponding to the trigger plate is installed on the inner wall of the mounting groove.

[0030] Preferably, the end of the drive rack that abuts against the converter socket has an arc-shaped end face.

[0031] Preferably, the drive rack has a sliding groove, a sliding plate is slidably fitted in the sliding groove, and a return spring is fixedly connected between the sliding plate and the sliding groove.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1. This invention uses an adjustable limiting part to limit the movement of converter sockets of different sizes. Through the cooperation of the damper and the return spring, the adjustable limiting part can adapt to different sizes of converter sockets while ensuring stability. The elastic cooperation of the damper and the return spring forms a dynamic self-adjusting limiting system. This dual-stage buffer mechanism (spring preload + damping attenuation) can withstand axial loads of more than 20N, ensuring the structural stability and contact reliability of converter sockets of different sizes under dynamic working conditions.

[0034] 2. This invention is based on laser profile measurement technology. A high-precision gear linkage mechanism drives the laser profiler to automatically adjust multiple angles from 0 to 180°, enabling all-round scanning and detection of the three-dimensional shape of the bottom of the converter socket. This effectively expands the limitations of traditional single-axis detection. Secondly, it innovatively constructs a dual-channel detection system. The upper detection unit is equipped with a high-resolution imaging system based on machine vision. Combined with an adaptive illumination compensation algorithm, it can accurately obtain the geometric parameters of key parts at the top of the socket. Precision scale markings are introduced in the clamping column. Operators can quickly determine the height of the socket through the micron-level scale of the clamping column, significantly improving detection efficiency. At the same time, through the coordinated operation of the trigger-type counting device and the PLC control unit, real-time statistics of the number of detections and automatic marking of abnormal data are realized, forming a complete quality traceability system. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure proposed in this invention;

[0036] Figure 2 This invention proposes Figure 1 The bottom view in the middle;

[0037] Figure 3 This invention proposes Figure 2 A schematic diagram of the structure after removing the mounting plate;

[0038] Figure 4 This invention proposes Figure 3 A partial enlarged structural diagram of part A in the diagram;

[0039] Figure 5 This is a schematic diagram of the connection structure between the adjustable limiting part and the second detection part proposed in this invention;

[0040] Figure 6 For the present invention Figure 5 The sectional view proposed in the paper;

[0041] Figure 7 This is a schematic diagram of the second detection unit proposed in this invention.

[0042] In the picture:

[0043] 1. Mounting bracket;

[0044] 2. Fix the mounting plate;

[0045] 3. Glass support panel;

[0046] 4. First detection unit; 401. Motor; 402. Drive shaft; 403. Mounting shaft; 404. Laser profilometer; 405. Drive gear; 406. Driven gear;

[0047] 5. Adjustable limiting part; 501. Guide frame; 502. Clamping column; 5021. Mounting groove; 503. Damper; 504. Connecting plate; 505. Buffer spring;

[0048] 6. Second detection unit; 601. Rotating shaft; 6011. Trigger plate; 6012. Counter; 602. Mounting gear; 603. Working groove; 604. Vision inspection module; 605. Drive rack; 6051. Sliding groove; 6052. Sliding plate; 6053. Return spring. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] Reference Figures 1-7 A visual inspection fixture for a converter socket includes a mounting base 1. A mounting plate 2 adapted to the converter socket production line is fixedly mounted on the lower end of the mounting base 1 by bolts. The mounting base 1 is a hollow rectangular structure with an open lower end. The cavity formed between the mounting plate 2 and the mounting base 1 has a cross-section of a circular arch. Both sides of the mounting plate 2 and the mounting base 1 are provided with rectangular bolt fixing plates. A glass support plate 3 for placing the converter socket is provided at the top of the mounting base 1.

[0051] The mounting base 1 is provided with a first detection unit 4 for detecting the bottom contour of the converter socket. The first detection unit 4 includes a motor 401, a drive shaft 402, a mounting shaft 403, a laser profilometer 404, a drive gear 405, and a driven gear 406. The components are arranged as follows:

[0052] Motor 401 is installed in the inner cavity of mounting base 1. Drive shaft 402, driven by motor 401, is rotatably installed in the inner cavity of mounting base 1. Mounting shaft 403 is rotatably installed in the inner cavity of mounting base 1. Laser profilometer 404 is fixedly installed on mounting shaft 403. The working principle of laser profilometer 404 is as follows: The laser emits a linear or point-like laser beam to the surface of the object being measured. The reflected light is imaged onto the sensor through a lens. Changes in the height of the object surface cause the position of the reflected light to shift. By calculating the shift and combining it with geometric trigonometric relationships, the three-dimensional contour data of the object surface is obtained. At the same time, a short-wavelength laser is selected. Specifically, blue laser (405nm) penetrates glass more easily than red laser (650nm), reducing the influence of refractive index. Meanwhile, the glass support plate 3 is made of anti-reflective coated glass. An anti-reflective coating is deposited on the glass surface of the laser incident surface, reducing the reflectivity from 4% to below 0.5%, suppressing interference from front surface reflection. At the same time, software is used for supplementation. The refraction path modeling process is as follows:

[0053] During the calibration phase, glass parameters (thickness t, refractive index n) are incorporated, and the measured values ​​are corrected using a formula:

[0054]

[0055] Z 真实 The actual height of the object's surface (relative to the lower surface of the glass).

[0056] Z 测量 The original measured height is calculated directly by the sensor.

[0057] Simultaneously, an algorithm is used to identify and remove reflected signals from the front surface of the glass, retaining only the effective point cloud of the object surface. This avoids the glass support plate 3 from affecting the laser profilometer 404. At the same time, the glass support plate 3 is used to support and limit the converter socket. While increasing the contact area with the converter socket, the transparent material characteristics of the glass support plate 3 provide sufficient observation area for the bottom of the converter socket, making the data collected by the laser profilometer 404 more comprehensive during use.

[0058] The drive gear 405 is fixedly mounted on the drive shaft 402, and the driven gear 406 is fixedly mounted on the mounting shaft 403. Through the meshing connection between the drive gear 405 and the driven gear 406, the motor 401 can automatically adjust the laser profilometer 404 from 0 to 180° when it starts, so as to realize the all-round scanning and detection of the three-dimensional shape of the bottom of the converter socket, and further improve the detection comprehensiveness of the laser profilometer 404.

[0059] The top of the mounting base 1 is fixedly provided with an adjustable limiting part 5 for limiting the position of the converter socket. The adjustable limiting part 5 includes a guide frame 501, a clamping post 502, a damper 503, a connecting plate 504, and a buffer spring 505. The components are arranged as follows:

[0060] The guide frame 501 is fixedly connected to the top of the mounting base 1. Clamping posts 502 are slidably mounted on the guide frame 501. Four clamping posts 502 are provided, each with a right-angled trapezoidal cross-section, resulting in a wedge-shaped geometry at the top of each post. This creates a contact interface with a gradually changing curvature. When this structure connects to multi-size converter sockets, it triggers a progressive horizontal displacement response mechanism based on the differences in their external dimensions: when the radius of curvature of the contact surface is positively correlated with the socket size, the wedge-shaped inclined surface converts the vertical contact force into a controllable horizontal component, achieving adaptive horizontal displacement adjustment. This adapts to the limiting operation of converter sockets of different sizes. The four clamping posts 502 are positioned on the glass support... At the four corners of the support plate 3, the end face of the clamping post 502 that abuts against the converter socket is provided with a scale for displaying the height. The top of the clamping post 502 is provided with a mounting groove 5021 for placing and installing the second detection part 6. The damper 503 is fixedly installed between the clamping post 502 and the guide frame 501. The connecting plate 504 is slidably fitted on the end where the damper 503 is connected to the guide frame 501. The buffer spring 505 is fixedly connected between the connecting plate 504 and the guide frame 501. It should be noted that the buffer spring 505 and the damper 503 can withstand an axial load of more than 20N, ensuring the structural stability and contact reliability of converter sockets of different specifications under dynamic working conditions.

[0061] The adjustable limiting part 5 is provided with a second detection part 6 for multi-dimensional dimensional detection of the upper end of the converter socket. The second detection part 6 includes a rotating shaft 601, a mounting gear 602, a working groove 603, a vision inspection module 604, and a drive rack 605. The components are arranged as follows:

[0062] The rotating shaft 601 is rotatably mounted on the inner wall of the mounting slot 5021. A trigger plate 6011 is fixedly mounted on the rotating shaft 601. A counter 6012 corresponding to the trigger plate 6011 is installed on the inner wall of the mounting slot 5021. It should be noted that the counter 6012 is equipped with a corresponding PLC control unit. The connection method between the two is a known technology and will not be described in detail. The trigger plate 6011 and the counter 6012 are used to form a trigger-type counting device, thereby realizing real-time statistics of the detected quantity and automatic marking of abnormal data, forming a complete quality traceability system.

[0063] The mounting gear 602 is fixedly mounted on the rotating shaft 601, and the working slot 603 is formed on the mounting gear 602. The vision inspection module 604 is fixedly mounted on the working slot 603. The vision inspection module 604 adopts a high-resolution machine vision imaging system, integrates adaptive optics compensation technology, and effectively eliminates ambient light interference through multi-spectral collaborative illumination mode, thereby achieving high-precision capture of sub-micron geometric features of the key structure at the top of the converter socket. At the same time, it captures the scale on the clamping column 502. With the help of a two-way verification mechanism built by digital image processing algorithms, the operator can achieve real-time and accurate analysis of dimensional parameters through the intelligent reading interface.

[0064] The drive rack 605 is slidably mounted on the inner wall of the mounting groove 5021 and meshes with the mounting gear 602. The end of the drive rack 605 that abuts against the converter socket is an arc-shaped end face, so that the drive rack 605 and the converter socket form a point contact, which helps to reduce the frictional force generated when the drive rack 605 and the converter socket come into contact. A sliding groove 6051 is provided on the drive rack 605, and a sliding plate 6052 is slidably fitted in the sliding groove 6051. A return spring 6053 is fixedly connected between the sliding plate 6052 and the sliding groove 6051. At the same time, the elastic force of the return spring 6053 enables the drive rack 605 to be reset when it is not affected by external force.

[0065] The functional principle of this invention can be explained through the following operational methods:

[0066] Place the mounting base 1 on the production line workbench and fix the mounting base 1 with bolts using the mounting plate 2;

[0067] The robotic arm inserts the converter socket into the clamping post 502. The bottom end of the converter socket abuts against the top end of the clamping post 502, causing the clamping post 502 to move outward. The clamping post 502 drives the connecting plate 504 to move horizontally. The connecting plate 504 drives the buffer spring 505 to retract. At this time, the output end of the damper 503 is pressed and moves.

[0068] The robotic arm continues to move the bottom of the converter socket downwards, and the bottom of the converter socket contacts the drive rack 605, causing the drive rack 605 to move outwards. This causes the sliding plate 6052 to move horizontally in the sliding groove 6051 and squeeze the return spring 6053. At the same time, it drives the mounting gear 602 to rotate, which in turn drives the vision detection module 604 to rotate, causing the vision detection module 604 to tilt downwards by 55°. Simultaneously, the mounting gear 602 drives the rotating shaft 601 to rotate, and the rotating shaft 601 causes the trigger plate 6011 to come into contact with the counter 6012.

[0069] The robotic arm continues to move the bottom of the converter socket downwards, causing the bottom of the converter socket to move against the glass support plate 3. The start motor 401 drives the drive shaft 402 to rotate, the drive shaft 402 drives the drive gear 405 to rotate, the drive gear 405 drives the driven gear 406 to rotate, the driven gear 406 drives the mounting shaft 403 to rotate, and the mounting shaft 403 drives the laser profilometer 404 to adjust the detection angle, so that the laser profilometer 404 can detect the bottom dimension of the converter socket, and the vision inspection module 604 can detect the top dimension of the converter socket.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vision inspection fixture for a converter socket, comprising a mounting base (1), characterized in that, The mounting base (1) is fixedly mounted with a fixed mounting plate (2) adapted to the converter socket production line by bolts at the lower end. The mounting base (1) is provided with a glass support plate (3) for placing the converter socket at the top. The mounting base (1) is provided with a first detection part (4) for detecting the bottom contour of the converter socket. The mounting base (1) is fixedly provided with an adjustable limiting part (5) for limiting the position of the converter socket at the top. The adjustable limiting part (5) is provided with a second detection part (6) for detecting the upper end of the converter socket in multiple dimensions. The first detection unit (4) includes: a motor (401) installed in the inner cavity of the mounting base (1); a drive shaft (402) driven by the motor (401), the drive shaft (402) being rotatably installed in the inner cavity of the mounting base (1); a mounting shaft (403) rotatably installed in the inner cavity of the mounting base (1); a laser profilometer (404) fixedly installed on the mounting shaft (403); a drive gear (405) fixedly installed on the drive shaft (402); and a driven gear (406) fixedly installed on the mounting shaft (403). The adjustable limiting part (5) includes: a guide frame (501) fixedly connected to the top of the mounting base (1); and a clamping column (502) slidably mounted on the guide frame (501). Four clamping columns (502) are provided. The top of the clamping column (502) is provided with a mounting groove (5021) for placing and mounting the second detection part (6). The second detection part (6) includes: a rotating shaft (601) rotatably mounted on the inner wall of the mounting groove (5021); a mounting gear (602) fixedly mounted on the rotating shaft (601); a working groove (603) opened on the mounting gear (602); a vision detection module (604) fixedly mounted on the working groove (603); and a drive rack (605) slidably mounted on the inner wall of the mounting groove (5021) and meshing with the mounting gear (602).

2. The visual inspection fixture for a converter socket according to claim 1, characterized in that, The mounting base (1) is a hollow rectangular structure with an opening at the lower end. The cavity formed between the fixed mounting plate (2) and the mounting base (1) has a cross-section in the shape of a circular arch. Both sides of the fixed mounting plate (2) and the mounting base (1) are provided with rectangular bolt fixing plates.

3. The visual inspection fixture for a converter socket according to claim 1, characterized in that, The adjustable limiting part (5) also includes: A damper (503) is fixedly installed between the clamping column (502) and the guide frame (501). The sliding sleeve is attached to the connecting plate (504) at the end where the damper (503) is connected to the guide frame (501). A buffer spring (505) is fixedly connected between the connecting plate (504) and the guide frame (501).

4. The visual inspection fixture for a converter socket according to claim 3, characterized in that, The longitudinal section of the clamping column (502) is a right trapezoidal structure. The four clamping columns (502) are located at the four corners of the glass support plate (3). The end face of the clamping column (502) that abuts against the converter socket is provided with a scale for displaying the height.

5. The visual inspection fixture for a converter socket according to claim 1, characterized in that, A trigger plate (6011) is fixedly mounted on the rotating shaft (601), and a counter (6012) corresponding to the trigger plate (6011) is installed on the inner wall of the mounting groove (5021).

6. The visual inspection fixture for a converter socket according to claim 1, characterized in that, The end of the drive rack (605) that abuts against the converter socket has an arc-shaped end face.

7. The visual inspection fixture for a converter socket according to claim 1, characterized in that, The drive rack (605) has a sliding groove (6051), a sliding plate (6052) is slidably fitted in the sliding groove (6051), and a return spring (6053) is fixedly connected between the sliding plate (6052) and the sliding groove (6051).

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