Metal piece microconcealer laser on-line repairing system based on visual identification

Abstract

The invention discloses a metal piece microconcealer laser on-line repairing system based on visual identification, and relates to the technical field of laser processing repairing, and the system comprises a mounting frame which is provided with a turntable capable of rotating step by step in the middle; the plurality of positioning mechanisms are distributed in a circumferential array and are fixed on the turntable; the feeding assembly is used for feeding the metal parts to the positioning mechanism; the two visual identification assemblies are arranged on the mounting frame and are used for identifying flaw positions of the metal piece; the laser repairing instrument can be used for treating the metal piece at different incident angles; the three shifting rods corresponding to the two visual recognition assemblies and the laser repairing instrument are arranged in the mounting frame and used for shifting the metal part to turn over the metal part, the overall automation level is high, and pertinence is high.

Description

Technical Field

[0001] The present invention relates to the technical field of laser processing and repair, and particularly to an online laser repair system for metal micro-defects based on visual recognition, which is especially suitable for automatic defect detection and laser repair of metal parts with a double-plate structure. Background Art

[0002] In the field of metal product production, the detection and repair of micro-defects on the surface of metal parts are key links affecting product quality. However, the traditional repair process has the following technical bottlenecks:

[0003] Existing detection methods mostly rely on manual visual inspection or single-angle machine vision inspection, resulting in low detection efficiency and high missed detection rate. For metal parts with a double-plate structure (such as sheet metal stamping parts), the defects on their bottom surface and the back are difficult to be effectively recognized by a single-side vision system, leading to blind spots in the repair process.

[0004] In addition, during the laser repair process, the traditional equipment has the following technical pain points:

[0005] The fixed laser incident angle is difficult to adapt to the reflectivity differences of metal parts made of different materials, easily causing overburning or insufficient repair;

[0006] There is a lack of a review mechanism after repair, and a secondary detection process is required, which affects the production line rhythm.

[0007] Therefore, it is necessary to provide an online laser repair system for metal micro-defects based on visual recognition to solve the above problems. Summary of the Invention

[0008] To solve the above problems, the present invention provides the following technical solutions: An online laser repair system for metal micro-defects based on visual recognition, comprising:

[0009] An installation frame, in the middle of which there is a turntable that can rotate step by step;

[0010] A plurality of positioning mechanisms distributed in a circumferential array, fixed on the turntable;

[0011] A feeding component for supplying metal parts to the positioning mechanisms;

[0012] Two visual recognition components, arranged on the installation frame, for identifying the defect positions of the metal parts;

[0013] A laser repair instrument capable of processing the metal parts at different incident angles;

[0014] Three toggle levers corresponding to the two visual recognition components and the laser repair instrument, arranged in the installation frame, for toggling the metal parts to make them flip.

[0015] Further, preferably, the bottom of the laser repair instrument is installed in the installation frame through a height adjuster.

[0016] Further, preferably, the two visual recognition components are respectively:

[0017] The first visual recognition component, including a first side viewer and a first top viewer, is used to identify the defective positions of the metal parts;

[0018] The second visual recognition component, including a second side viewer and a second top viewer, is used to recheck the repaired metal parts.

[0019] Further, preferably, the two visual recognition components are the first visual recognition component and the second visual recognition component respectively;

[0020] The first visual recognition component can also identify the reflectivity of the metal parts, and the laser repair instrument can adjust the laser incident angle according to the reflectivity.

[0021] Further, preferably, the laser repair instrument uses p-polarized light, and its laser incident angle is θ = arctan(n2 / n1), where n1 is the refractive index of the incident medium and n2 is the refractive index of the metal part.

[0022] Further, preferably, the metal part includes a first plate body and a second plate body, wherein:

[0023] The first plate body has a first hole body, and the second plate body has a second hole body;

[0024] The positioning mechanism includes:

[0025] A base, fixed on the turntable;

[0026] A first positioning head slidably arranged vertically on the base, used to position the first hole body;

[0027] A second positioning head slidably arranged vertically on the base, used to position the second hole body;

[0028] An alternating driving component, used to drive the first positioning head and the second positioning head to lift alternately.

[0029] Further, preferably, the alternating driving component includes:

[0030] A first cam rotatably arranged in the base, corresponding to the first positioning head, and a first synchronous wheel is coaxially fixed to the first cam;

[0031] A second cam rotatably arranged in the base, corresponding to the second positioning head, and a second synchronous wheel is coaxially fixed to the second cam;

[0032] The synchronous belt is drivingly connected between the first synchronous pulley and the second synchronous pulley;

[0033] The protrusions of the first cam and the second cam are arranged in opposite directions.

[0034] Furthermore, as a preference, a groove is formed on the upper surface of the base, and a positioning angle plate is arranged in the groove. The thickness of the positioning angle plate matches the depth of the groove, and the metal part can be attached to the base.

[0035] Furthermore, as a preference, connection plates are fixed on both sides of the positioning angle plate, and the connection plates are rotationally connected to the side walls of the groove through a rotating shaft.

[0036] Compared with the prior art, the present invention provides a laser online repair system for metal part micro-defects based on visual recognition, having the following beneficial effects:

[0037] In the present invention, an orthogonal side view - top view binocular detection architecture is adopted, combined with a reflectivity recognition function, to achieve accurate positioning of the defect position and dynamic matching of laser parameters;

[0038] In the present invention, a double positioning head is alternately lifted and lowered through a cam - synchronous belt mechanism, and metal parts in different states can be accurately positioned;

[0039] In the present invention, a feeding component, an automatic flipping mechanism and a repair effect review module are integrated to form a closed-loop control process, reducing manual intervention. Description of the Drawings

[0040] Figure 1 It is a front view structural schematic diagram of a laser online repair system for metal part micro-defects based on visual recognition;

[0041] Figure 2 It is a three-dimensional structural schematic diagram of a laser online repair system for metal part micro-defects based on visual recognition;

[0042] Figure 3 For Figure 1 The structural schematic diagram after removing the installation frame in

[0043] Figure 4 For Figure 3 The top view structural schematic diagram of

[0044] Figure 5 It is a three-dimensional structural schematic diagram of the positioning mechanism;

[0045] Figure 6 For Figure 5 The enlarged structural schematic diagram at A in

[0046] Figure 7 It is a cross-sectional structural schematic diagram of the positioning mechanism;

[0047] In the figure: 1. mounting frame; 2. discharging assembly; 3. feeding assembly; 4. first side view meter; 5. turntable; 6. positioning mechanism; 7. first top view meter; 8. second side view meter; 9. second top view meter; 10. laser repair instrument; 11. height adjuster; 12. metal parts; 121. first plate body; 122. second plate body; 61. base; 62. first positioning head; 63. second positioning head; 64. positioning angle plate; 65. connecting plate; 66. rotating shaft; 67. first cam; 68. second cam; 69. synchronous belt. DETAILED DESCRIPTION

[0048] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0049] Example: Please refer to Figures 1 - 7 In an embodiment of the present invention, a laser online repair system for metal parts with micro-defects based on visual recognition is provided, comprising:

[0050] The mounting frame 1 has a rotating disk 5 which can rotate step by step arranged in the middle thereof;

[0051] A plurality of positioning mechanisms 6 distributed in a circumferential array, fixed on the turntable 5;

[0052] A feeding assembly 3, used for supplying a metal part 12 to the positioning mechanism 6;

[0053] Two visual recognition components, arranged on the mounting frame 1, for identifying defect positions of the metal member 12;

[0054] A laser repair device 10 capable of processing the metal part 12 at different incident angles;

[0055] Three levers (not shown in the figure) corresponding to the two visual recognition components and the laser repair device 10 are arranged in the installation frame 1 and are used to move the metal part 12 to flip it.

[0056] The implementation includes the following steps:

[0057] Step 1: The feeding component 3 starts to work, feeding the metal part 12 to be detected into the positioning mechanism 6 fixed on the turntable 5. The positioning mechanism 6 positions the metal part 12.

[0058] Step 2: The turntable 5 drives the positioning mechanism 6 and the metal part 12 to rotate step by step. When the metal part 12 moves to the detection position of the first vision recognition component, this vision recognition component identifies the defects on the surface of the metal part 12. And the corresponding lever toggles the metal part 12 to make it flip, so that multiple faces of the metal part 12 can be visually recognized, and then the defect position information is determined.

[0059] Step 3: The turntable 5 continues to rotate.

[0060] Step 4: The laser repair instrument 10 performs laser repair processing on the defects on the metal part 12 according to the defect position information provided by the vision recognition component. During this process, the corresponding lever selectively toggles the metal part 12 to make it flip, so that multiple faces of the metal part 12 can be processed by the laser repair instrument 10.

[0061] Step 5: After the laser repair is completed, the turntable 5 drives the metal part 12 to move to the position of another vision recognition component again to perform a review test on the repaired metal part 12.

[0062] Step 6: The turntable 5 continues to rotate step by step, repeating the above working process to realize continuous on-line detection, repair and review of multiple metal parts 12.

[0063] Preferably, a discharging component 2 is further arranged in the installation frame 1 for sending out the metal parts 12 on the turntable 5.

[0064] That is to say, the whole system realizes full-process automated operation from feeding, vision recognition, metal part flipping, laser repair to review, reduces manual intervention, improves production efficiency and reduces labor costs.

[0065] Among them, the bottom of the laser repair instrument 10 is installed in the installation frame 1 through a height adjuster 11, and the height adjuster 11 is any one of an electric telescopic rod, a cylinder, a hydraulic cylinder, and a lead screw nut pair mechanism.

[0066] And the two vision recognition components are respectively:

[0067] The first vision recognition component, including a first side-view instrument 4 and a first top-view instrument 7, is used to identify the defect position of the metal part 12;

[0068] The second vision recognition component, including a second side-view instrument 8 and a second top-view instrument 9, is used to review the repaired metal part 12.

[0069] The first visual recognition component (the first side viewer 4 and the first top viewer 7) and the second visual recognition component (the second side viewer 8 and the second top viewer 9) both form an orthogonal detection layout, which can synchronously capture the front, side and hole-edge defects of the metal part 12, reducing the detection blind area by more than 80%.

[0070] Among them, the first visual component dynamically adjusts the incident angle of the laser repair instrument 10 by recognizing the reflectivity of the metal part 12, avoiding overburning or insufficient repair, and being compatible with various materials such as aluminum alloy and stainless steel.

[0071] In this embodiment, the two visual recognition components are the first visual recognition component and the second visual recognition component respectively;

[0072] The first visual recognition component can also recognize the reflectivity of the metal part 12, and the laser repair instrument 10 can adjust the laser incident angle according to this reflectivity.

[0073] Specifically, the laser repair instrument 10 uses p-polarized light, and its laser incident angle is θ = arctan(n2 / n1), where n1 is the refractive index of the incident medium and n2 is the refractive index of the metal part (12).

[0074] The laser repair instrument 10 uses p-polarized light, and the p-polarized light can achieve the minimum reflectivity near θ = arctan(n2 / n1), where: n1 is the refractive index of the incident medium (n1≈1 (refractive index of air)); n2 is the refractive index of the metal part 12.

[0075] Example: When repairing aluminum alloy, the first visual recognition component recognizes that the reflectivity of the metal part 12 is 1.37, then θ = arctan(1.37 / 1)≈54°.

[0076] In this embodiment, dynamically adjusting the incident angle can increase the laser absorption rate by 5%-30%, reduce the repair energy consumption; by matching the incident angle with the metal refractive index, reduce the workpiece deformation caused by heat diffusion, reduce the hardness fluctuation of the repair area, and a single laser can be adapted to a variety of metal materials.

[0077] In this embodiment, the metal part 12 includes a first plate body 121 and a second plate body 122, where:

[0078] The first plate body 121 has a first hole body, and the second plate body 122 has a second hole body;

[0079] The positioning mechanism 6 includes:

[0080] A base 61, fixed on the turntable 5;

[0081] A first positioning head 62 slidably arranged vertically on the base 61, for positioning the first hole body;

[0082] A second positioning head 63 vertically slidably disposed on the base 61, for positioning the second hole body;

[0083] The alternating driving assembly is used to drive the first positioning head 62 and the second positioning head 63 to rise and fall alternately.

[0084] During implementation, when the metal piece 12 is placed on the positioning mechanism 6, the alternating drive assembly starts working according to a preset program or signal. Since the first plate 121 of the metal piece 12 has a first hole and the second plate 122 has a second hole, the alternating drive assembly first drives the first positioning head 62 to rise, and the first positioning head 62 is inserted into the first hole of the first plate 121 to accurately position the first plate 121. At the same time, the second positioning head 63 is in a descending state to avoid interference with the metal piece 12.

[0085] When the metal part 12 needs to be turned over, the alternating drive assembly moves to make the first positioning head 62 descend and withdraw from the first hole to release the positioning of the first plate 121. Then, the second positioning head 63 rises and inserts into the second hole of the second plate 122 to position the second plate 122.

[0086] That is to say, the first positioning head 62 and the second positioning head 63 respectively position the first hole of the first plate 121 and the second hole of the second plate 122, which can achieve precise positioning of the metal part 12, ensure the position accuracy of the metal part 12 in subsequent operations such as detection and repair, and is conducive to improving the quality of detection and repair.

[0087] Wherein, the alternating drive component comprises:

[0088] A first cam 67 rotatably disposed in the base 61 corresponds to the first positioning head 62, and a first synchronous wheel is coaxially fixed to the first cam 67;

[0089] A second cam 68 rotatably disposed in the base 61 corresponds to the second positioning head 63, and a second synchronous wheel is coaxially fixed to the second cam 68;

[0090] A synchronous belt 69, drivingly connected between the first synchronous wheel and the second synchronous wheel;

[0091] The protrusions of the first cam 67 and the second cam 68 are arranged in opposite directions. Furthermore, the projection of the protrusion of the first cam 67 on the first cam 67 occupies 1 / 4 of the side area of ​​the first cam 67; the projection of the protrusion of the second cam 68 on the second cam 68 occupies 1 / 4 of the side area of ​​the second cam 68.

[0092] The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt 69 in a transmission manner, enabling the first cam 67 and the second cam 68 to rotate synchronously. This synchronism ensures that the alternating lifting and lowering actions of the first positioning head 62 and the second positioning head 63 can be precisely coordinated, avoiding positioning inaccuracies or interference problems caused by non-synchronization, and improving the stability and reliability of the system.

[0093] The alternating drive assembly adopts a combined structure of cams (the first cam 67 and the second cam 68), synchronous pulleys (the first synchronous pulley and the second synchronous pulley), and a synchronous belt 69. The overall structure is simple and compact, occupying a small space. This structure is convenient for installation in the base 61 and will not have an adverse impact on the overall layout and installation of the positioning mechanism 6. At the same time, it also reduces the complexity and manufacturing cost of the system.

[0094] Furthermore, a groove is formed on the upper surface of the base 61, and a positioning angle plate 64 is arranged in the groove. The thickness of the positioning angle plate 64 matches the depth of the groove, and the metal part 12 can be attached to the base 61.

[0095] Furthermore, connection plates 65 are fixed on both sides of the positioning angle plate 64, and the connection plates 65 are rotatably connected to the side walls of the groove through a rotating shaft 66.

[0096] In this embodiment, a groove is formed on the upper surface of the base 61, and the positioning angle plate 64 is placed therein, and the thickness of the positioning angle plate 64 matches the depth of the groove. Such a design enables the metal part 12 to closely adhere to the surface of the base 61 when the metal part 12 is placed on the positioning mechanism 6, ensuring the flatness and stability of the placement of the metal part 12 and providing a good foundation for subsequent positioning, detection, and repair operations.

[0097] Connection plates 65 are fixed on both sides of the positioning angle plate 64, and the connection plates 65 are rotatably connected to the side walls of the groove through a rotating shaft 66. This rotational connection method endows the positioning angle plate 64 with a certain degree of flexibility, enabling it to rotate within a certain range, and the rotational connection design of the positioning angle plate 64 can avoid interference with other components to a certain extent. For example, during the flipping process of the metal part 12, the positioning angle plate 64 can rotate to adapt to the movement trajectory of the metal part 12, reducing the occurrence of accidental displacement of the metal part 12.

[0098] Furthermore, the axis of the rotating shaft 66 coincides with the first contour line, and the first contour line is the outer contour line where the first plate body 121 intersects the second plate body 122.

[0099] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention any equivalent substitution or change made according to the technical solution and inventive concept of the present invention.

Claims

1. An online laser repair system for micro-defective metal parts based on visual recognition, characterized in that, include: A mounting frame (1), wherein a rotating disk (5) capable of stepping and rotating is provided in the middle thereof; A plurality of positioning mechanisms (6) distributed in a circumferential array and fixed on the rotating disk (5); A feeding assembly (3) for supplying metal parts (12) to the positioning mechanism (6); Two visual recognition components, arranged on the installation frame (1) and used to identify defect positions of the metal part (12), the two visual recognition components being respectively a first visual recognition component and a second visual recognition component; A laser repair device (10) capable of processing the metal part (12) at different incident angles; Three levers corresponding to the two visual recognition components and the laser repair device (10) are respectively arranged in the installation frame (1) and are used to move the metal part (12) to flip it over.

2. The laser on-line repair system for metal part micro-defects based on visual recognition according to claim 1, characterized in that, The bottom of the laser repair device (10) is installed in the installation frame (1) via a height adjuster (11).

3. The laser on-line repair system for metal part micro-defects based on visual recognition according to claim 1, wherein The first visual recognition component comprises a first side viewer (4) and a first top viewer (7), and is used to identify the defect position of the metal part (12); The second visual recognition component comprises a second side viewer (8) and a second top viewer (9), which are used to review the repaired metal part (12).

4. The laser online repair system for metal part micro-defects based on visual recognition according to claim 1, characterized in that, The first visual recognition component is also capable of recognizing the reflectivity of the metal part (12), and the laser repair device (10) is capable of adjusting the laser incident angle according to the reflectivity.

5. The laser online repair system for metal part micro-defects based on visual recognition according to claim 4, wherein, The laser repair device (10) uses p-polarized light, and the laser incident angle is θ=arctan(n2 / n1), wherein n1 is the refractive index of the incident medium, and n2 is the refractive index of the metal part (12).

6. The laser on-line repair system for micro-defective metal parts based on visual recognition according to claim 1, wherein, The metal member (12) comprises a first plate body (121) and a second plate body (122); the first plate body (121) has a first hole body, and the second plate body (122) has a second hole body; The positioning mechanism (6) comprises: A base (61) fixed on the turntable (5); A first positioning head (62) vertically slidably disposed on the base (61) and used for positioning the first hole body; A second positioning head (63) vertically slidably disposed on the base (61) and used for positioning the second hole body; The alternating drive assembly is used to drive the first positioning head (62) and the second positioning head (63) to alternately rise and fall.

7. The laser on-line repair system for metal part micro-defects based on visual recognition according to claim 6, characterized in that, The alternating drive assembly comprises: Rotating a first cam (67) disposed in the base (61), wherein the first cam (67) corresponds to the first positioning head (62), and a first synchronous wheel is coaxially fixed to the first cam (67); A second cam (68) is rotatably arranged in the base (61), wherein the second cam (68) corresponds to the second positioning head (63), and a second synchronous wheel is coaxially fixed to the second cam (68); A synchronous belt (69) drivingly connected between the first synchronous wheel and the second synchronous wheel; The protrusions of the first cam (67) and the second cam (68) are arranged in opposite directions.

8. The on-line laser repair system for micro-defects of metal parts based on visual recognition according to claim 6, characterized in that, A groove is formed on the upper surface of the base (61), and a positioning angle plate (64) is arranged in the groove. The thickness of the positioning angle plate (64) matches the depth of the groove, and the metal part (12) can be attached to the base (61).

9. The laser online repair system for metal part micro-defects based on visual recognition according to claim 8, characterized in that Connection plates (65) are fixed on both sides of the positioning angle plate (64), and the connection plates (65) are rotatably connected to the side walls of the groove through rotating shafts (66).

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