Sheet metal part size detection device

Abstract

The utility model belongs to visual inspection device technical field, specifically disclose a sheet metal size detection device, including workstation and the positioning module and detection module of installation in workstation, positioning module includes the mounting arm group for fixed and positioning sheet metal, mounting arm group sets up in workstation in the mode that can be driven around setting axis single -freedom rotation, detection module includes the top unit and a plurality of side units, and the top unit and a plurality of side units are dispersedly arranged in the workstation to form the surrounding of fixed sheet metal, the utility model discloses the cooperative work of rotating positioning mechanism and multi -angle visual inspection system, significantly improved the flexibility and accuracy of detection, avoided the error problem brought by artificial measurement, has the advantages of improving detection precision, enhancing equipment adaptability and improving detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of visual inspection device technology, and in particular relates to a sheet metal part size inspection device. Background Technology

[0002] Sheet metal parts, due to their unique shapes, face numerous technical challenges when performing dimensional inspections. Traditional manual measurement methods have significant limitations; variations in the skill level of the measuring personnel can lead to inconsistent results, and for sheet metal parts with complex curved surfaces, manual measurement struggles to obtain accurate three-dimensional dimensional data. While existing automated inspection equipment improves efficiency to some extent, its fixed structural design has significant drawbacks: the camera position of vision inspection equipment is fixed and cannot be flexibly adjusted according to the different structural features of the sheet metal part; the scanning path of laser inspection equipment, once preset, is difficult to adapt to varying product contours. This rigid structural design often requires complex mechanical adjustments or even equipment replacement when dealing with sheet metal parts of different sizes and shapes, severely impacting inspection efficiency. Furthermore, the lighting systems of existing equipment are typically fixed, unable to adapt to different inspection angles and positions, easily generating measurement shadows or glare interference, further affecting inspection accuracy. In terms of positioning, traditional fixtures are mostly single-fixed, failing to meet the multi-angle inspection needs of sheet metal parts with complex curved surface features, leading to frequent disassembly and repositioning of the workpiece during the inspection process.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a sheet metal part size detection device, which has the advantages of improving detection accuracy, enhancing equipment adaptability and improving detection efficiency, so as to solve the problems of poor detection accuracy and low detection efficiency in traditional detection technology.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a sheet metal part size detection device, including a worktable and a positioning module and a detection module installed on the worktable. The positioning module includes a mounting arm assembly for fixing and positioning the sheet metal part. The mounting arm assembly is arranged on the worktable in a manner that allows it to rotate freely around a set axis with a single degree of freedom. The detection module includes a top camera unit and multiple side camera units. The top camera unit and multiple side camera units are distributed on the worktable to form a surrounding enclosure around the fixed sheet metal part.

[0006] Furthermore, the top-view unit includes a top-view column and a top-view camera. The top-view column is vertically mounted on the worktable, and the top-view camera is mounted on the top-view column in a lockable sliding manner and is located above the mounting arm assembly.

[0007] Furthermore, the side-viewing unit includes a side-viewing column and a side-viewing camera. The side-viewing column is vertically mounted on the worktable, and the side-viewing camera is mounted on the side-viewing column in a lockable sliding manner. The side-viewing camera can be driven to swing in a vertical plane.

[0008] Furthermore, the positioning module also includes a positioning platform and a rotary drive source. The positioning platform is detachably and fixedly mounted on the worktable, the mounting arm assembly is rotatably mounted on the worktable, and the rotary drive source is mounted on the positioning platform to drive the mounting arm assembly to rotate.

[0009] Furthermore, the top camera unit also includes a fill light mounted on the top camera column. The fill light is positioned between the top camera and the mounting arm assembly, and the fill light can be controlled to slide along the top camera column.

[0010] Furthermore, the fill light has a radially closed ring structure, and the fill light is coaxially set with the top camera.

[0011] Furthermore, the top camera unit also includes an adjustment arm, which is mounted on the top camera column in a manner that allows it to slide along the top camera column and rotate around the top camera column in a manner that allows it to be controlled. At least two adjustment arms are provided, and the top camera and the fill light are respectively mounted on the corresponding adjustment arms in a manner that allows them to slide along the adjustment arms.

[0012] Furthermore, the side-view camera unit includes a mounting plate, which is mounted on the side-view camera column in a manner that allows it to slide controllably along the side-view camera column and rotate controllably around the side-view camera column, and the side-view camera is oscillatingly mounted on the mounting plate.

[0013] Furthermore, it also includes a protective frame, which is installed on the workbench and surrounds the positioning module and the detection module.

[0014] The beneficial effects of this technical solution are as follows:

[0015] This utility model provides a sheet metal part size inspection device. By setting up a rotatable mounting arm assembly and multiple inspection cameras that can be adjusted with multiple degrees of freedom, it can realize multi-angle inspection of sheet metal parts. The coordinated work of this rotating positioning mechanism and the multi-angle vision inspection system significantly improves the flexibility and accuracy of inspection, avoids the error problems caused by manual measurement, and has the advantages of improving inspection accuracy, enhancing equipment adaptability and improving inspection efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a sheet metal part size detection device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of a sheet metal part size detection device according to the present invention;

[0018] Figure 3 This is a schematic diagram showing the position distribution of the detection modules in a sheet metal part size detection device according to this utility model;

[0019] Figure 4 This is a front view of the positioning module of a sheet metal part size detection device according to the present invention;

[0020] Figure 5 This is a schematic diagram of the top camera unit of a sheet metal part size detection device according to the present invention;

[0021] Figure 6 This is a schematic diagram of the side camera unit of a sheet metal part size detection device according to the present invention. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: 1. Workbench; 2. Protective frame; 3. Start / stop operation button; 4. Human-machine interface; 5. Positioning module; 5. Mounting arm assembly; 501. Positioning platform; 502. Rotary drive source; 503. Top camera unit; 6. Top camera; 601. Top camera column; 602. Adjustable cantilever; 603. Fill light; 604. Side camera unit; 7. Side camera; 701. Side camera column; 702. Mounting slide plate; 703.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The basic implementation examples are as follows: Figure 1The diagram illustrates a sheet metal part dimensional inspection device, comprising a worktable 1, a positioning module 5, and a detection module mounted on the worktable 1. The positioning module 5 includes a mounting arm assembly 501 for fixing and positioning the sheet metal part. The mounting arm assembly 501 is mounted on the worktable 1 in a drivable manner, rotating with a single degree of freedom around a set axis. The detection module includes a top camera unit 6 and multiple side camera units 7, which are distributed on the worktable 1 to form a surrounding enclosure around the fixed sheet metal part. The mounting arm assembly 501 is a whole composed of multiple mounting arms connected detachably. Multiple mounting arms with different structures can adapt to the fixing and positioning of sheet metal parts with different structures. The set axis is a vertically extending axis and is the central axis of the mounting arm assembly 501 as a whole, ensuring greater stability during rotation. The top camera unit 6 can be an industrial CCD camera or a CMOS camera, etc., and the number of side camera units 7 is typically set to 4-6. The camera mounting height is adjustable to accommodate sheet metal parts of different sizes. The surrounding camera group enables simultaneous multi-angle imaging of the sheet metal part. Therefore, the rotatable mounting arm assembly 501 enables multi-angle positioning of sheet metal parts, and in conjunction with the surround-arranged camera system, it effectively solves the problem of poor adaptability of traditional inspection equipment. Compared with fixed inspection equipment, this device can adapt to the inspection needs of sheet metal parts of different shapes and sizes by adjusting the camera position and shooting angle. The coordinated work of the rotating positioning mechanism and the multi-angle shooting system significantly improves the flexibility and accuracy of inspection, avoiding the error problems caused by manual measurement.

[0026] In this embodiment, the top-viewing unit 6 includes a top-viewing column 602 and a top-viewing camera 601. The top-viewing column 602 is vertically mounted on the worktable 1, and the top-viewing camera 601 is mounted on the top-viewing column 602 in a lockable sliding manner and is located above the mounting arm assembly 501. Specifically, the top-viewing column 602 is made of a rigid material, such as aluminum alloy or stainless steel, to ensure stability in the vertical direction. The top-viewing column 602 is fixed to the worktable 1 by bolts or welding. As a preferred embodiment, a scale can be provided on the surface of the top-viewing column 602 to facilitate quick positioning of the camera height. The top-viewing camera 601 can be an industrial CCD camera or a CMOS camera, and its lens axis is aligned parallel to or coincident with the rotation axis of the mounting arm assembly 501. Thus, by arranging the adjustable-height top-viewing camera 601, the problem of fixed-viewpoint detection equipment being unable to adapt to sheet metal parts of different thicknesses is solved. Specifically, when the sheet metal part structure changes, simply loosening the locking device and adjusting the camera height is sufficient to regain the optimal shooting distance. This ensures consistent image quality and avoids the cumbersome operation of changing inspection fixtures. Compared to fixed camera mounting, this design significantly improves the adaptability of the inspection system while maintaining measurement accuracy.

[0027] In this embodiment, the side-viewing unit 7 includes a side-viewing column 702 and a side-viewing camera 701. The side-viewing column 702 is vertically mounted on the worktable 1, and the side-viewing camera 701 is mounted on the side-viewing column 702 in a lockable manner, and the side-viewing camera 701 can be driven to swing in a vertical plane. Specifically, the side-viewing column 702 is fixed to the worktable 1 by bolts. As a preferred embodiment, the surface of the side-viewing column 702 is provided with a scale to facilitate height adjustment. Through the design of the sliding and swinging side-viewing camera 701, multi-angle detection of the side dimensions of sheet metal parts is realized. The camera height is adjustable to adapt to workpieces of different sizes, and the swinging function solves the blind spot problem of fixed-angle shooting. Compared with the prior art, this design significantly improves the flexibility and accuracy of detection, especially suitable for sheet metal parts with complex curved surface structures. Adaptation to different workpieces can be completed through simple mechanical structure adjustments, reducing equipment modification costs. While maintaining detection accuracy, it effectively improves detection efficiency and solves the problem of poor adaptability of traditional fixed detection equipment.

[0028] In this embodiment, the positioning module 5 further includes a positioning platform 502 and a rotary drive source 503. The positioning platform 502 is detachably and fixedly mounted on the worktable 1, and the mounting arm assembly 501 is rotatably mounted on the worktable 1. The rotary drive source 503 is mounted on the positioning platform 502 to drive the mounting arm assembly 501 to rotate. Specifically, the positioning platform 502 serves as a support structure for the mounting arm assembly 501 and can be detachably fixed to the worktable 1 using bolt connections or a quick-clamping mechanism. The rotary drive source 503 can be a servo motor, a stepper motor, or a pneumatic rotary actuator, and is connected to the mounting arm assembly 501 via a coupling or a reduction mechanism. The rotation axis of the mounting arm assembly 501 is perpendicular to the plane of the worktable 1, and its rotation angle range can be adjusted by mechanical limits or program control. The control signal for the rotary drive source 503 can be provided by an external controller to achieve precise adjustment of the rotation speed and direction. Therefore, by adding a positioning stage 502 and a rotary drive source 503, the mounting arm assembly 501 gains controllable rotation capability, and the introduction of the rotary drive source 503 enables multi-angle positioning of the sheet metal part during the inspection process. Specifically, when different sides of the sheet metal part need to be inspected, the rotary drive source 503 can drive the mounting arm assembly 501 and the sheet metal part fixed thereon to rotate to a predetermined angle, allowing the side camera unit 7 to acquire complete side image data. This design effectively solves the problem that fixed inspection devices cannot comprehensively inspect complex sheet metal parts, improving the comprehensiveness, flexibility, and accuracy of the inspection. Compared with existing technologies, this solution maintains structural stability while achieving adjustable inspection angles, avoiding blind spots caused by the special shape of the sheet metal part.

[0029] In this embodiment, the top camera unit 6 also includes a fill light 604 installed on the top camera column 602. The fill light 604 is located between the top camera 601 and the mounting arm assembly 501. The fill light 604 can be slidably arranged along the top camera column 602.

[0030] Specifically, the supplementary light 604 can be an LED ring light source or a dot matrix light source, with the ring light source preferably being a shadowless lamp structure with adjustable brightness. The power supply line of the supplementary light 604 can be integrated into the wiring groove inside the top camera column 602 to avoid interference from external cables. As a preferred embodiment, the sliding stroke range of the supplementary light 604 covers the entire focusing area of ​​the top camera 601, ensuring uniform illumination when shooting at different heights. Thus, this technical solution effectively solves the problem of unstable image quality caused by the reflective properties of sheet metal surfaces by adding an adjustable supplementary light 604 below the top camera 601. The independent height adjustment function of the supplementary light 604 allows it to adapt to the inspection needs of sheet metal parts of different sizes. When inspecting workpieces with complex curved surfaces or deep cavity structures, shadow interference can be eliminated by precisely controlling the supplementary light angle and distance. Compared with fixed lighting, this design significantly improves the clarity and consistency of image acquisition, providing a reliable visual data foundation for subsequent dimensional measurements. Specifically, the coordinated adjustment mechanism between the supplementary light 604 and the top camera 601 enables the system to quickly optimize lighting conditions for sheet metal parts with different materials and surface treatment processes. Furthermore, in this embodiment, the supplementary light 604 is a radially closed annular structure, and the supplementary light 604 and the top camera 601 are coaxially arranged. This coaxial annular supplementary lighting design ensures that the illumination light is parallel to the camera's optical axis, effectively eliminating shadow interference caused by the curved surface of the sheet metal part. Compared to traditional side-lighting methods, the annular coaxial structure ensures uniform illumination on the surface of the measured part, avoiding measurement errors caused by differences in the incident angle of light. Specifically, when inspecting sheet metal parts with complex curved surfaces, this design significantly improves image acquisition quality, providing high-contrast inspection images for subsequent dimensional calculations. Furthermore, the radially closed characteristic prevents light scattering from interfering with the side camera unit 7, ensuring the consistency of multi-view inspection data.

[0031] In this embodiment, the top-viewing unit 6 further includes an adjusting arm 603. The adjusting arm 603 is mounted on the top-viewing column 602 in a manner that allows it to slide controllably along the top-viewing column 602 and rotate controllably around the top-viewing column 602. At least two adjusting arms 603 are provided, and the top-viewing camera 601 and the supplementary light 604 are respectively mounted on their respective adjusting arms 603 in a manner that allows them to slide along the adjusting arms 603. Specifically, the adjusting arms 603 can adopt a telescopic structure or a segmented structure to achieve sliding adjustment. The telescopic structure is driven by a hydraulic cylinder or an electric push rod, while the segmented structure is achieved by a slide rail and a slider. Rotation adjustment can be achieved by a rotary motor or a manual rotation mechanism. The sliding of the top-viewing camera 601 and the supplementary light 604 on the adjusting arms 603 can be achieved by a linear guide rail or a dovetail groove structure, and the positions are fixed by locking screws or electromagnetic locks. The number of adjusting arms 603 can be set to two or more according to the detection requirements. For example, four adjusting arms 603 distributed in a cross shape can be used to achieve multi-angle coverage. Therefore, this technical solution, by adding a cantilever structure with multi-degree-of-freedom adjustment, allows the top-mounted camera 601 and the supplementary light 604 to flexibly adjust their position and angle in three-dimensional space. Specifically, sliding adjustment along the column can accommodate sheet metal parts of different heights, rotation adjustment around the column can change the shooting orientation, and sliding along the cantilever allows for fine-tuning of the equipment spacing. This solves the problem that fixed inspection equipment cannot adapt to sheet metal parts of different sizes and shapes, and significantly improves the versatility of the inspection device through the adjustability of the mechanical structure. Compared with existing technologies, this solution maintains inspection accuracy while achieving omnidirectional adjustability of the spatial position of the inspection unit, making it particularly suitable for dimensional inspection of sheet metal parts with complex curved surfaces or irregular shapes.

[0032] In this embodiment, the side-viewing unit 7 includes a mounting slide plate 703. The mounting slide plate 703 is mounted on the side-viewing column 702 in a manner that allows it to slide controllably along the side-viewing column 702 and rotate controllably around the side-viewing column 702. The side-viewing camera 701 is oscillatingly mounted on the mounting slide plate 703. Specifically, the mounting slide plate 703 is connected to the side-viewing column 702 via a sliding mechanism. The sliding mechanism can be a guide rail slider structure or a linear bearing structure, allowing the mounting slide plate 703 to slide vertically along the side-viewing column 702. In this embodiment, a split slider structure connected by a connector is used. When adjustment is needed, the connector can be loosened, allowing for both sliding and rotation. The mounting slide plate 703 has mounting holes. The side-viewing camera 701 is mounted on the mounting slide plate 703 via bolts, nuts, or other connecting structures using the mounting holes. When the shooting angle of the side-viewing camera 701 needs to be adjusted, the connecting structure can be loosened. Thus, through the sliding and rotation adjustment functions of the mounting slide plate 703, the position and angle of the side-viewing camera 701 can be flexibly adjusted to adapt to the inspection needs of sheet metal parts of different shapes and sizes. Compared to fixed installation methods, this solution significantly improves the adaptability and flexibility of the testing equipment, solving the limitations caused by the fixed position of the testing actuator in existing technologies. At the same time, the maneuverability of the mounting plate 703 makes camera position adjustment more convenient and efficient, which helps improve testing accuracy and work efficiency.

[0033] In this embodiment, a protective frame 2 is also included. The protective frame 2 is installed on the workbench 1 and surrounds the positioning module 5 and the detection module. The protective frame 2 can be implemented using a metal frame structure combined with a transparent protective plate. The metal frame structure is preferably made of aluminum alloy to balance lightweight and strength, and the transparent protective plate can be made of tempered glass or polycarbonate. The protective frame 2 can be connected to the workbench 1 by bolts or a quick-release mechanism, and its height must cover the highest working position of the detection module. The protective frame 2 can be equipped with an operating door to allow operators to access the equipment. The operating door is equipped with a safety interlock switch to ensure that the equipment stops operating when the door is opened. Specifically, the protective frame 2 mainly serves the following functions: preventing external foreign objects from entering the detection area and interfering with measurement accuracy; blocking metal debris that may be generated during the detection process; and isolating the mechanical moving parts of the equipment during operation to ensure operational safety. As a preferred embodiment, a lighting system can be integrated inside the protective frame 2 to improve the lighting conditions of the detection environment, and heat dissipation holes can be provided on the top to form airflow circulation with the internal fan. Thus, by adding the protective frame 2, the safety hazards and environmental interference problems of the open structure are effectively solved while maintaining the original functions of the detection device. This design protects the precision testing equipment from the workshop environment, provides a safety barrier for operators, and facilitates equipment maintenance and sheet metal loading / unloading operations. Compared to existing exposed testing equipment, this solution significantly improves equipment stability and operational safety.

[0034] In this embodiment, an interpersonal interaction interface 4 and a start / stop operation button 3 are also provided. The start / stop operation button 3 is an integrated button that can realize one-click detection. The interpersonal interaction interface 4 integrates the operating software and setting program of the entire detection device. The specific program used for visual size detection is a conventional technical means in the field and will not be described in detail here.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A sheet metal part dimension detection device, characterized in that: The device includes a worktable and a positioning module and a detection module mounted on the worktable. The positioning module includes a mounting arm assembly for fixing and positioning sheet metal parts. The mounting arm assembly is mounted on the worktable in a manner that allows it to rotate freely around a set axis with a single degree of freedom. The detection module includes a top camera unit and multiple side camera units, which are distributed on the worktable to form a surrounding enclosure for the fixed sheet metal parts.

2. The sheet metal part dimension detection device according to claim 1, characterized in that: The top-viewing unit includes a top-viewing column and a top-viewing camera. The top-viewing column is vertically mounted on the worktable, and the top-viewing camera is mounted on the top-viewing column in a lockable sliding manner and is located above the mounting arm assembly.

3. The sheet metal part dimension detection device according to claim 2, characterized in that: The side-viewing unit includes a side-viewing column and a side-viewing camera. The side-viewing column is vertically mounted on the worktable, and the side-viewing camera is mounted on the side-viewing column in a lockable sliding manner. The side-viewing camera can be driven to swing in a vertical plane.

4. The sheet metal part dimension detection device according to claim 3, characterized in that: The positioning module also includes a positioning platform and a rotary drive source. The positioning platform is detachably and fixedly installed on the workbench, the mounting arm assembly is rotatably installed on the workbench, and the rotary drive source is installed on the positioning platform to drive the mounting arm assembly to rotate.

5. The sheet metal part dimension detection device according to claim 4, characterized in that: The top-mounted camera unit also includes a fill light installed on the top-mounted camera column. The fill light is positioned between the top-mounted camera and the mounting arm assembly, and the fill light can be controlled to slide along the top-mounted camera column.

6. The sheet metal part dimension detection device according to claim 5, characterized in that: The fill light is a radially closed ring structure, and the fill light is coaxially set with the top camera.

7. A sheet metal part dimension detection device according to claim 6, characterized in that: The top camera unit also includes an adjustment arm, which is installed on the top camera column in a manner that allows it to slide along the top camera column and rotate around the top camera column in a manner that allows it to be controlled. At least two adjustment arms are provided, and the top camera and the fill light are respectively installed on the corresponding adjustment arms in a manner that allows them to slide along the adjustment arms.

8. The sheet metal part dimension detection device according to claim 7, characterized in that: The side camera unit includes a mounting plate, which is mounted on the side camera column in a manner that allows it to slide controllably along the side camera column and rotate controllably around the side camera column. The side camera is oscillatingly mounted on the mounting plate.

9. A sheet metal part dimension detection device according to claim 8, characterized in that: It also includes a protective frame, which is installed on the workbench and surrounds the positioning module and the detection module.

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