Reciprocating optical control device applied to metal plate detection

Abstract

This invention relates to the field of metal sheet inspection and control technology, and in particular to a reciprocating optical control device for metal sheet inspection. It includes an upper horizontal inspection guide rail and a lower horizontal inspection guide rail, and suspended inspection frames at both ends of the upper and lower horizontal inspection guide rails. A lateral optical inspection probe is fixedly installed inside the suspended inspection frames. Both the upper and lower horizontal inspection guide rails are equipped with horizontal guide grooves, and reciprocating first and second control seats are arranged inside the horizontal guide grooves. The reciprocating first and second control seats coordinate with the lateral optical inspection probe to scan and inspect the metal sheet by reverse translation within the horizontal guide grooves. This invention achieves full-area, blind-spot-free online inspection of metal sheets through the bidirectional reverse translation of the reciprocating control seats in conjunction with a single set of lateral optical probes. It features a simple structure, low cost, and strong adaptability.

Description

Technical Field

[0001] This invention relates to the field of metal sheet inspection and control technology, and in particular to a reciprocating optical control device for metal sheet inspection. Background Technology

[0002] Metal sheets are a core basic material in machinery manufacturing, precision machining, and hardware production. The flatness, integrity, and precision of defects on the sheet surface directly determine the processing quality and performance of subsequent products. Therefore, in metal sheet production lines, online optical inspection is a crucial process for real-time quality control and the removal of defective sheets. Currently, the mainstream optical inspection methods for metal sheets in the industry mostly employ a detection structure with multiple fixed optical probe arrays. These arrayed optical probes scan the surface of the metal sheets during transport to identify various defects such as scratches, dents, color differences, and breakage. Compared to manual inspection, this method effectively improves basic inspection efficiency and has been widely applied in routine sheet production inspection scenarios.

[0003] However, in practical production applications, this traditional optical inspection solution still suffers from many unavoidable technical defects, severely restricting the accuracy and adaptability of high-precision, full-specification sheet metal inspection. First, the existing optical probe array has a fixed arrangement structure, resulting in poor adaptability of inspection parameters. It can only perform inspections on metal sheets of fixed specifications, failing to meet the inspection needs of sheets with different widths, thicknesses, and irregular shapes, thus limiting its applicability. Second, the entire inspection equipment requires a large number of optical probes to achieve full-coverage inspection, leading to high costs for hardware procurement, installation, and subsequent maintenance, significantly increasing the production and quality inspection costs for enterprises. Simultaneously, the multi-probe combination inspection structure has inherent blind spots; the inspection areas of each probe cannot be completely connected, creating gaps that easily lead to missed or false detections of minute defects. Furthermore, the traditional inspection mode cannot achieve synchronous inspection of the entire sheet metal area; it can only scan and inspect area by area according to the sheet metal's transport sequence, resulting in poor real-time performance. This makes it difficult to meet the high-precision, blind-spot-free inspection requirements of high-speed production lines and cannot adapt to the current refined, high-speed, and multi-specification production and quality inspection needs of metal sheets. Therefore, how to construct an optical inspection device that is structurally simple, cost-controllable, adaptable to various specifications of sheet materials, and has no blind spots is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing optical inspection device for metal sheets uses multiple fixed probe arrays for detection, which has the following technical problems: large detection blind zone, high cost due to the large number of probes, inability to adapt to different specifications of sheet materials, and poor real-time detection.

[0005] The technical solution adopted by this invention to solve its technical problem is: a reciprocating optical control device for metal sheet inspection, including a horizontal upper detection rail and a horizontal lower detection rail, and a suspended detection frame at both ends of the horizontal upper detection rail and the horizontal lower detection rail. A lateral optical inspection probe is fixedly installed inside the suspended detection frame. The upper and lower ends of the suspended detection frame are staggered with mounting slots for mounting the buckles at both ends of the horizontal upper detection rail and the horizontal lower detection rail. Both the horizontal upper detection rail and the horizontal lower detection rail are provided with horizontal guide grooves. A reciprocating first control seat and a reciprocating second control seat are provided inside the horizontal guide grooves. The reciprocating first control seat and the reciprocating second control seat cooperate with the lateral optical inspection probe to scan and inspect the metal sheet by reverse translation control inside the horizontal guide grooves.

[0006] Furthermore, the latches at both ends of the horizontal upper detection rail and the horizontal lower detection rail adopt a staggered layout design.

[0007] Furthermore, the transverse guide slide has an integrally structured central dividing frame at its center, which divides the interior of the transverse guide slide into a first guide slide adapted to a reciprocating first control seat and a second guide slide adapted to a reciprocating second control seat.

[0008] Furthermore, the buckle has end light guide lenses fixedly installed at both ends to cooperate with the lateral optical inspection probe, and the reciprocating first control seat and the reciprocating second control seat have built-in light guide lenses installed inside to cooperate with the end light guide lenses.

[0009] Furthermore, the central dividing frame has an inverted T-shaped structure, and lateral limiting grooves are provided on the inner walls of both sides of the horizontal guide groove.

[0010] Furthermore, a side-mounted winch for adjusting the hoisting angle is fixedly installed on the outer side of the hoisting inspection frame.

[0011] Furthermore, the hoisting inspection frame integrates an electronic level that works in conjunction with a side-mounted winch.

[0012] Furthermore, the reciprocating first control seat and the reciprocating second control seat have built-in light guide grooves for assembling built-in light guide lenses.

[0013] Furthermore, metal contact pieces for power supply are provided on the contact surfaces of the central dividing frame and the reciprocating first control seat and the reciprocating second control seat.

[0014] Furthermore, the buckle has a hollowed-out opening inside.

[0015] The beneficial effects of this invention are as follows: By using a bidirectional reverse-shifting reciprocating first and second control seats in conjunction with a lateral optical inspection probe, full-area scanning inspection can be achieved with only a single probe, significantly reducing hardware and maintenance costs; through the optical path transmission design of the end light guide lens and the built-in light guide lens, the lateral optical inspection optical path can cover any position on the surface of the sheet material, eliminating the detection blind spots of traditional multi-probe arrays; through the staggered mounting slots in conjunction with a side-mounted winch and electronic level, it can quickly adapt to metal sheets of different widths and thicknesses, significantly improving versatility; through the first and second guide slides of the centrally located dividing frame in conjunction with the metal contact plate power supply, the independent and stable operation and continuous power supply of the two control seats are achieved, ensuring the real-time synchronous inspection requirements of high-speed production lines. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure on the other side of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the hoisting inspection frame.

[0020] Figure 4 This is a schematic diagram of the internal structure of the horizontally positioned detection guide rail.

[0021] Explanation of reference numerals in the attached drawings: 100. Horizontal upper detection guide rail; 101. Horizontal lower detection guide rail; 200. Suspended detection frame; 210. Lateral optical fixed inspection probe; 220. Mounting slot; 230. Side-mounted winch; 240. Electronic level; 300. Horizontal guide slide; 310. Central dividing frame; 311. First guide slide; 312. Second guide slide; 320. Lateral limiting slide; 400. Reciprocating first control seat; 410. Reciprocating second control seat; 420. Built-in light guide lens; 421. Built-in light guide groove; 430. Metal contact piece; 500. End light guide lens; 510. Cutout. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 and Figure 4 As shown, a reciprocating optical control device for metal sheet inspection according to the present invention includes a horizontally arranged upper inspection guide 100 and a horizontally arranged lower inspection guide 101. The two ends of the upper and lower inspection guides 100 and 101 are fixedly connected to a suspended inspection frame 200 via mounting slots 220, forming a complete inspection frame structure. The suspended inspection frame 200 is a rectangular frame structure, and a lateral optical inspection probe 210 is fixedly installed inside it, with the lateral optical inspection probe 210 facing the side of the metal sheet. The upper and lower ends of the suspended inspection frame 200 are offsetly provided with mounting slots 220, the positions of which correspond one-to-one with the latches at both ends of the upper and lower inspection guides 100 and 101. The mounting slots 220 adopt a staggered layout design, meaning the upper and lower mounting slots 220 are not on the same vertical line. This results in a staggered arrangement between the horizontal upper detection guide rail 100 and the horizontal lower detection guide rail 101 after installation, expanding the detection field of view. A side-mounted winch 230 is fixedly installed on the outer side of the hoisting detection frame 200. By adjusting the length of the wire rope of the side-mounted winch 230, the hoisting angle of the entire detection device can be adjusted to meet the detection needs of plates with different inclination angles. The hoisting detection frame 200 also integrates an electronic level 240, which works in conjunction with the side-mounted winch 230. During the adjustment of the side-mounted winch 230, the operator can observe the reading of the electronic level 240 in real time to ensure the levelness of the detection device and guarantee detection accuracy. The buckle also has a hollow opening 510 to reduce the overall weight and facilitate heat dissipation.

[0025] Both the upper and lower horizontal detection guide rails 100 and 101 have horizontal guide grooves 300 along their length. The horizontal guide grooves 300 are through-slots penetrating the interior of the guide rails. At the center of each horizontal guide groove 300 is an integrally formed central dividing frame 310, which is an inverted T-shaped structure that divides the interior of the horizontal guide groove 300 into an upper first guide groove 311 and a lower second guide groove 312. The first guide groove 311 accommodates and guides the reciprocating first control seat 400 to slide linearly along the length of the guide rail, while the second guide groove 312 accommodates and guides the reciprocating second control seat 410 to slide linearly along the length of the guide rail. Lateral limiting grooves 320 are also provided on the inner walls of both sides of the horizontal guide groove 300. The lateral limiting grooves 320 cooperate with the limiting protrusions on both sides of the reciprocating first control seat 400 and the reciprocating second control seat 410 to prevent the control seat from deflecting or falling out during the sliding process and to ensure the accuracy of the movement direction.

[0026] The reciprocating first control seat 400 and the reciprocating second control seat 410 slide independently within the first guide groove 311 and the second guide groove 312 of the transverse guide groove 300, respectively, with opposite sliding directions. During the inspection process, the reciprocating first control seat 400 and the reciprocating second control seat 410 simultaneously move in opposite directions within the transverse guide groove 300; that is, when the reciprocating first control seat 400 slides from left to right, the reciprocating second control seat 410 slides from right to left, and vice versa. The synchronous reverse movement of the two control seats is controlled by an external drive mechanism, which can achieve the linkage and reverse movement of the two control seats through lead screw transmission or synchronous belt transmission. Through the reciprocating reverse movement of the two control seats, in conjunction with the lateral optical inspection probe 210 installed and fixed on the suspended inspection frame 200, point-by-point scanning inspection of the entire width direction of the metal plate is achieved.

[0027] The reciprocating first control seat 400 and the reciprocating second control seat 410 have built-in light guide grooves 421 for mounting built-in light guide lenses 420. Correspondingly, end light guide lenses 500 are fixedly mounted inside the clips at both ends of the horizontal upper detection rail 100 and the horizontal lower detection rail 101. The end light guide lenses 500 correspond to the position of the lateral optical inspection probe 210 and are used to refract and guide the detection beam emitted by the lateral optical inspection probe 210 into the horizontal guide groove 300. The built-in light guide lenses 420 are installed in the built-in light guide grooves 421 of the reciprocating first control seat 400 and the reciprocating second control seat 410 to receive the beam of light transmitted from the end light guide lenses 500 and further guide it to the surface of the metal plate being inspected. Through the optical path transmission cooperation of the end light guide lens 500 and the built-in light guide lens 420, the detection light emitted by the lateral optical fixed inspection probe 210 can be transmitted to any detection position on the surface of the board through optical path refraction, so as to realize the full-width coverage detection of a single probe.

[0028] Metal contact pieces 430 are provided between the upper surface of the central dividing frame 310 and the lower surface of the reciprocating first control seat 400, and between the lower surface of the central dividing frame 310 and the upper surface of the reciprocating second control seat 410. The metal contact pieces 430 are elastic metal sheets fixed to the surfaces of the reciprocating first control seat 400, the reciprocating second control seat 410, and the central dividing frame 310. The metal contact pieces 430 conduct electrical energy from an external power source to the interior of the reciprocating first control seat 400 and the reciprocating second control seat 410, supplying power to the auxiliary driving element or position detection element of the built-in light guide lens 420. The metal contact pieces 430 maintain electrical connection with the corresponding contact point on the central dividing frame 310 throughout the sliding process of the control seats, achieving continuous power supply during the sliding process.

[0029] The working principle of this invention is as follows: When the metal sheet passes through the inspection frame along the conveyor line, the lateral optical inspection probe 210 emits a detection beam. After being refracted by the end light guide lens 500, the beam propagates along the direction of the horizontal guide groove 300, and is then refracted onto the surface of the metal sheet by the built-in light guide lens 420 on the reciprocating first control seat 400 or the reciprocating second control seat 410. Simultaneously, the reciprocating first control seat 400 and the reciprocating second control seat 410 perform synchronous reciprocating movements in opposite directions within the horizontal guide groove 300, causing the detection spot of the built-in light guide lens 420 to move continuously along the width direction of the sheet, achieving line-by-line scanning of the entire width of the sheet. The reflected light signal returns to the lateral optical inspection probe 210 along the same optical path, is collected by the probe, and transmitted to the host computer for image processing and defect identification. The installation angle of the entire inspection frame can be adjusted by the side-mounted winch 230 and the electronic level 240, allowing the inspection device to adapt to different tilt angles at the sheet inspection station.

[0030] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A reciprocating optical control device for inspecting metal sheets, comprising a horizontally positioned upper inspection guide rail (100) and a horizontally positioned lower inspection guide rail (101), characterized in that: The horizontal upper detection rail (100) and the horizontal lower detection rail (101) are connected to a suspended detection frame (200) at both ends. A lateral optical inspection probe (210) is fixedly installed inside the suspended detection frame (200). The upper and lower ends of the suspended detection frame (200) are offsetly provided with mounting slots (220) for mounting the buckles at both ends of the horizontal upper detection rail (100) and the horizontal lower detection rail (101). The lower detection guide rail (101) is provided with a horizontal guide groove (300) inside. The horizontal guide groove (300) is provided with a reciprocating first control seat (400) and a reciprocating second control seat (410). The reciprocating first control seat (400) and the reciprocating second control seat (410) are adjusted by reverse translation inside the horizontal guide groove (300) to cooperate with the lateral optical fixed inspection probe (210) to scan and detect the metal plate.

2. The reciprocating optical control device for metal sheet inspection according to claim 1, characterized in that: The buckles at both ends of the horizontal upper detection guide rail (100) and the horizontal lower detection guide rail (101) are designed with a staggered layout.

3. The reciprocating optical control device for metal sheet inspection according to claim 1, characterized in that: The transverse guide slide (300) has an integrally structured central dividing frame (310) at its center. The transverse guide slide (300) is divided into a first guide slide (311) adapted to the reciprocating first control seat (400) and a second guide slide (312) adapted to the reciprocating second control seat (410) by the central dividing frame (310).

4. The reciprocating optical control device for metal sheet inspection according to claim 1, characterized in that: The buckle has end light guide lenses (500) fixedly installed at both ends to cooperate with the lateral optical inspection probe (210), and the reciprocating first control seat (400) and reciprocating second control seat (410) have built-in light guide lenses (420) that cooperate with the end light guide lenses (500).

5. A reciprocating optical control device for metal sheet inspection according to claim 3, characterized in that: The central dividing frame (310) has an inverted T-shaped structure, and the inner walls on both sides of the horizontal guide slide (300) are provided with lateral limiting slides (320).

6. The reciprocating optical control device for metal sheet inspection according to claim 1, characterized in that: A side-mounted winch (230) for adjusting the hoisting angle is fixedly installed on the outer side of the hoisting inspection frame (200).

7. A reciprocating optical control device for detecting metal sheets according to claim 6, characterized in that: The hoisting inspection frame (200) integrates an electronic level (240) that works in conjunction with the side-mounted winch (230).

8. A reciprocating optical control device for metal sheet inspection according to claim 4, characterized in that: The reciprocating first control seat (400) and the reciprocating second control seat (410) have built-in light guide grooves (421) for assembling built-in light guide lenses (420).

9. A reciprocating optical control device for detecting metal sheets according to claim 1, characterized in that: The central dividing frame (310) is provided with metal contact pieces (430) for power supply on the contact surfaces of the reciprocating first control seat (400) and the reciprocating second control seat (410).

10. A reciprocating optical control device for detecting metal sheets according to claim 1, characterized in that: The buckle has a hollow opening (510) inside.

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