A defect detection device for sheet metal

Abstract

This utility model discloses a sheet metal defect detection device, comprising: a support frame arranged within a detection gap between a feeding conveyor roller device and a discharging conveyor roller device; and a defect detection mechanism mounted on the support frame, comprising multiple detection units spaced apart along the length of the detection gap. Each detection unit includes a signal transmitting component for transmitting signals and a signal receiving component corresponding to the signal transmitting component for receiving signals. The signal transmitting component is arranged in the detection gap below the signal receiving component and is inclined towards the feeding conveyor roller device. The signal transmitting component includes a first mounting base fixed on the support frame and an ultrasonic transmitting probe adjustable in angle on the first mounting base. The signal receiving component includes a second mounting base fixed on the support frame and an ultrasonic receiving probe adjustable in angle on the second mounting base. The detection device provided by this utility model can improve detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing technology, and in particular to a sheet metal defect detection device. Background Technology

[0002] During the production process, engineered wood panels may develop defects such as surface bulges and internal gaps. These defects affect the appearance and sales, ultimately leading to substandard products.

[0003] Current technology involves manually identifying and eliminating substandard boards with bubbles or internal hollows using visual inspection. This process is known as surface defect detection in the production of engineered wood panels.

[0004] During the inspection process, the board needs to be manually inspected visually on the front before being flipped over to inspect the back. This process has the following defects and shortcomings:

[0005] ① Manual identification is difficult, and there are always omissions, leading to rework. ② During the inspection process, operators flip over 1.2m*2.4m boards, increasing the risk of injury due to their weight. ③ During inspection, defects vary in size, some are very hidden, and are difficult to detect with the naked eye, easily leading to inaccurate inspections and serious missed detections. ④ The inspection work is labor-intensive, and the accuracy and pass rate of manual inspection cannot be guaranteed. ⑤ Inspection can only be carried out after the boards are stacked, resulting in extremely low work efficiency. ⑥ The wood chips need to be handled during inspection, and the handling process can cause secondary damage to the boards (scratches and bumps), resulting in unnecessary losses. Utility Model Content

[0006] The purpose of this invention is to provide a defect detection device for sheet metal, which can reduce labor intensity and improve production efficiency.

[0007] Based on the above problems, the technical solution provided by this utility model is as follows:

[0008] A sheet metal defect detection device, installed between an infeed conveyor roller device and an outfeed conveyor roller device, is used to detect defects on the sheet metal, comprising:

[0009] A support is arranged in the detection gap between the feed conveyor roller device and the discharge conveyor roller device;

[0010] A defect detection mechanism, which is mounted on the bracket, includes a plurality of detection units arranged at intervals along the length of the detection gap. Each detection unit includes a signal transmitting component for transmitting signals and a signal receiving component for receiving signals, which is arranged corresponding to the signal transmitting component. The signal transmitting component is arranged in the detection gap below the signal receiving component and is inclined toward the feed conveying roller device.

[0011] The signal transmitting assembly includes a first mounting base fixed on the bracket and an ultrasonic transmitting probe that is adjustable in angle on the first mounting base. The signal receiving assembly includes a second mounting base fixed on the bracket and an ultrasonic receiving probe that is adjustable in angle on the second mounting base.

[0012] In some embodiments, the first mounting base includes a fixed plate and two connecting plates disposed at both ends of the fixed plate, an adjustment bracket is provided between the two connecting plates for angle adjustment, and the ultrasonic transmitting probe is mounted on the adjustment bracket;

[0013] The structure of the second mounting base is the same as that of the first mounting base.

[0014] In some embodiments, the connecting plate is provided with limiting holes and angle adjustment slots spaced apart for the connecting parts to pass through, and the adjustment bracket is provided with a first positioning hole corresponding to the limiting hole and a second positioning hole corresponding to the angle adjustment slot.

[0015] In some embodiments, the adjusting bracket is provided with a mounting hole through which the ultrasonic transmitting probe passes and a mounting flange is circumferentially fixed to the mounting hole. The ultrasonic transmitting probe is threadedly connected to the mounting flange, and the mounting structure of the ultrasonic receiving probe is the same as that of the ultrasonic transmitting probe.

[0016] In some embodiments, the outer periphery of the ultrasonic transmitting probe and the ultrasonic receiving probe are respectively provided with protective covers.

[0017] In some embodiments, the support includes a base, two columns fixed to the base and arranged opposite each other, and an upper crossbeam and a lower crossbeam fixed between the two columns, with the signal transmitting component mounted on the lower crossbeam and the signal receiving component mounted on the upper crossbeam.

[0018] In some embodiments, the lower crossbeam has a first groove at its lower end for the signal line of the ultrasonic transmitting probe to pass through, and the upper crossbeam has a second groove at its upper end for the signal line of the ultrasonic receiving probe to pass through.

[0019] In some embodiments, the base includes two base beams arranged opposite each other and two base longitudinal beams connected between the two base beams, and the column is vertically fixed on the base longitudinal beams.

[0020] In some embodiments, a reinforcing member connects the column to the base longitudinal beam.

[0021] In some embodiments, the base longitudinal beam is provided with foot assemblies at both ends. The foot assemblies include fixed feet and lifting feet. The fixed feet are L-shaped and fixed to the side of the base longitudinal beam away from the base crossbeam. The lifting feet are threaded to the base longitudinal beam and located below the base longitudinal beam.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] 1. By using the transmitting and receiving probes of the ultrasonic sensor to detect defects such as bubbles and internal gaps on the board, no manual intervention is required, the identification accuracy is high, the problem of missed detection is not easy, and the production efficiency is improved.

[0024] 2. This device allows for the inspection of sheet materials during transport, eliminating the need for manual handling and improving production safety;

[0025] 3. Since the ultrasonic signal transmitter and receiver are located on opposite sides of the thickness direction of the plate, the sound wave signal will deviate along the direction of the plate's movement during the plate's motion. The signal transmitting component is tilted towards the feeding conveyor roller device, which can cancel out the deviation of the ultrasonic signal, thereby improving the accuracy of the test.

[0026] 4. The bracket is equipped with a cable tray structure to facilitate the storage of ultrasonic sensor signal cables and improve the compactness of the structure;

[0027] 5. The signal transmitting component is placed in the detection gap below the signal receiving component, which makes it easier to place the signal transmitting component close to the board material and improves the detection accuracy. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is one of the structural schematic diagrams of an embodiment of a plate defect detection device according to the present invention;

[0030] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0031] Figure 3 for Figure 1 Enlarged view of a section at point B in the middle;

[0032] Figure 4 This is a schematic diagram of the structure of the ultrasonic transmitting probe and the ultrasonic receiving probe in the embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram illustrating the usage state of an embodiment of the present utility model;

[0034] in:

[0035] 100. Feed conveyor roller device; 200. Discharge conveyor roller device; 300. Sheet metal;

[0036] 1. Bracket; 1-1. Column; 1-2. Upper crossbeam; 1-3. Lower crossbeam; 1-4. First cable tray; 1-5. Second cable tray; 1-6. Reinforcing member; 1-7. Base crossbeam; 1-8. Base longitudinal beam; 1-9. Fixed foot; 1-10. Lifting foot;

[0037] 2. Signal transmitting assembly; 2-1. First mounting base; 2-1a. Fixing plate; 2-1b. Connecting plate; 2-1b1. Limiting hole; 2-1b2. Adjustment groove; 2-2. Ultrasonic transmitting probe; 2-3. Adjustment bracket; 2-3a. First positioning hole; 2-3b. Second positioning hole; 2-4. Mounting flange;

[0038] 3. Signal receiving component; 3-1. Second mounting base; 3-2. Ultrasonic receiving probe;

[0039] 4. Control unit;

[0040] 5. Protective cover. Detailed Implementation

[0041] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0042] like Figure 1 and Figure 5 The diagram shown is a structural schematic of the present invention, which provides a sheet metal defect detection device installed between the feeding conveyor roller device 100 and the discharging conveyor roller device 200 for detecting defects on the sheet metal 300. The device includes a bracket 1 and a defect detection mechanism installed on the bracket 1.

[0043] The feeding conveyor roller device 200 and the discharging conveyor roller device 300 are existing technologies. They mainly include a frame, multiple rollers that are rolled on the frame, and a drive motor that is connected to one of the rollers. The multiple rollers are connected by gear transmission. The drive motor drives the multiple rollers to rotate, thereby conveying the plate 300.

[0044] The defect detection mechanism includes multiple detection units spaced apart along the length of the detection gap. Each detection unit includes a signal transmitting component 2 for transmitting signals and a signal receiving component 3 corresponding to the signal transmitting component 2 for receiving signals. The signal transmitting component 2 is arranged below the signal receiving component 3 and is inclined towards the feed conveyor roller device 200. Correspondingly, the signal receiving component 3 is inclined towards the discharge conveyor roller device 300. Preferably, the angle between the signal transmitting direction of the signal transmitting component 2 and the vertical direction is 20° to 25°.

[0045] like Figure 2 As shown, the signal transmitting component 2 includes a first mounting base 2-1 fixed on the bracket 1 and an ultrasonic transmitting probe 2-2 with an adjustable angle mounted on the first mounting base 2-1. The signal receiving component 3 includes a second mounting base 3-1 fixed on the bracket 1 and an ultrasonic receiving probe 3-2 with an adjustable angle mounted on the second mounting base 3-1. The ultrasonic transmitting probe 2-2 and the ultrasonic receiving probe 3-2 are respectively connected to the control unit 4, which can be mounted on the bracket 1. The ultrasonic receiving probe 3-2 transmits the measured cross-sectional data of the plate 300 to the control unit 4. The control unit 4 compares the detection data with the cross-sectional data of a preset standard plate to determine whether the plate 300 has defects. When a defect is detected, the control unit 300 sends a signal to the rejection device (not shown) to reject the defective plate 300. This is prior art and will not be described in detail in this utility model.

[0046] like Figure 4 As shown, the first mounting base 2-1 includes a fixed plate 2-1a and two connecting plates 2-1b disposed at both ends of the fixed plate 2-1a. An adjustable bracket 2-3 is provided between the two connecting plates 2-1b at an adjustable angle. The two connecting plates 2-1b are arranged opposite to each other and connected to the fixed plate 2-1a in a U-shaped structure. The adjustable bracket 2-3 is connected to the connecting plate 2-1b via a connector, which can be a bolt. The ultrasonic transmitting probe 2-2 is mounted on the adjustable bracket 2-3. The structure of the second mounting base 3-1 is the same as that of the first mounting base 2-1. Correspondingly, the ultrasonic receiving probe 3-2 is mounted on the adjustable bracket 2-3 of the second mounting base 3-1.

[0047] To facilitate the installation of the adjustment bracket 2-3, the connecting plate 2-1b is provided with a limiting hole 2-1b1 and an angle adjustment groove 2-1b2 arranged at intervals for the connector to pass through. The angle adjustment groove 2-1b2 is an oblong groove. At the same time, the adjustment bracket 2-3 is provided with a first positioning hole 2-3a corresponding to the limiting hole 2-1b1 and a second positioning hole 2-3b corresponding to the angle adjustment groove 2-1b2. By adjusting the position of the connector in the angle adjustment groove 2-1b2, the angle of the adjustment bracket 2-3 on the first mounting base 2-1 can be adjusted, thereby adjusting the installation angle of the ultrasonic transmitting probe 2-2.

[0048] To facilitate the installation of the ultrasonic probe, the adjusting bracket 2-3 is provided with a mounting hole for the ultrasonic transmitting probe 2-2 to pass through, and a mounting flange 2-4 is fixed circumferentially to the mounting hole. The ultrasonic transmitting probe 2-2 is threadedly connected to the mounting flange 2-4. The installation structure of the ultrasonic receiving probe 3-2 is the same as that of the ultrasonic transmitting probe 2-2.

[0049] To further optimize the implementation effect of this utility model, protective covers 5 are provided on the outer periphery of the ultrasonic transmitting probe 2-2 and the ultrasonic receiving probe 3-2, respectively, which can prevent sensor collision, prevent signal attenuation caused by ultrasonic diffusion, increase signal density, and improve detection accuracy.

[0050] The support 1, which is arranged between the feed conveyor roller device 100 and the discharge conveyor roller device 200, includes a base, two columns 1-1 fixed on the base and arranged opposite to each other, and an upper crossbeam 1-2 and a lower crossbeam 1-3 fixed between the two columns 1-1. The signal transmitting component 2 is installed on the lower crossbeam 1-3, and the signal receiving component 3 is installed on the upper crossbeam 1-2.

[0051] To facilitate the storage of the signal wires of the ultrasonic sensor, a first groove 1-4 is provided at the lower end of the lower crossbeam 1-3 for the signal wires of the ultrasonic transmitting probe 2-2 to pass through, and a second groove 1-5 is provided at the upper end of the upper crossbeam 1-2 for the signal wires of the ultrasonic receiving probe 3-2 to pass through.

[0052] The base includes two base beams 1-7 arranged opposite each other and two base longitudinal beams 1-8 connected between the two base beams 1-7, and the column 1-1 is vertically fixed on the base longitudinal beams 1-8.

[0053] To improve the strength of the support structure, a reinforcing member 1-6 is connected between the column 1-1 and the base longitudinal beam 1-8.

[0054] like Figure 3As shown, in order to facilitate the support of the bracket, foot assemblies are provided at both ends of the base longitudinal beam 1-8. The foot assemblies include fixed feet 1-9 and lifting feet 1-10. The fixed feet 1-9 are L-shaped and are fixed to the side of the base longitudinal beam 1-8 away from the base crossbeam 1-7 by expansion bolts to support the base longitudinal beam 1-8. The lifting feet 1-10 are threadedly connected to the base longitudinal beam 1-8 and are located below the base longitudinal beam 1-8. By adjusting the height of the lifting feet 1-10, the bracket 1 can be leveled.

[0055] By using multiple ultrasonic sensors spaced apart along the length of the detection gap to detect the cross-sectional data of the plate 300 and comparing it with the preset standard plate cross-sectional data in the control unit 4, defects on the plate 300 can be detected, and whether the plate 300 is qualified can be determined. The detection is completed during the conveying process of the plate 300, without the need for manual visual observation or manual flipping, thus improving the detection accuracy and efficiency.

[0056] The above examples are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A board defect detection apparatus installed between an infeed conveyor roller apparatus and an outfeed conveyor roller apparatus for detecting defects on a board, characterized by, include: A support is arranged in the detection gap between the feed conveyor roller device and the discharge conveyor roller device; A defect detection mechanism, which is mounted on the bracket, includes a plurality of detection units arranged at intervals along the length of the detection gap. Each detection unit includes a signal transmitting component for transmitting signals and a signal receiving component for receiving signals, which is arranged corresponding to the signal transmitting component. The signal transmitting component is arranged in the detection gap below the signal receiving component and is inclined toward the feed conveying roller device. The signal transmitting assembly includes a first mounting base fixed on the bracket and an ultrasonic transmitting probe that is adjustable in angle on the first mounting base. The signal receiving assembly includes a second mounting base fixed on the bracket and an ultrasonic receiving probe that is adjustable in angle on the second mounting base.

2. The sheet defect detection apparatus according to claim 1, characterized by: The first mounting base includes a fixed plate and two connecting plates disposed at both ends of the fixed plate. An adjustment bracket is provided between the two connecting plates to adjust the angle. The ultrasonic transmitting probe is mounted on the adjustment bracket. The structure of the second mounting base is the same as that of the first mounting base.

3. The sheet defect detection apparatus according to claim 2, characterized by: The connecting plate is provided with limiting holes and angle adjustment grooves arranged at intervals for connecting parts to pass through, and the adjustment bracket is provided with a first positioning hole corresponding to the limiting hole and a second positioning hole corresponding to the angle adjustment groove.

4. The sheet defect detection apparatus according to claim 2, characterized by: The adjusting bracket is provided with a mounting hole for the ultrasonic transmitting probe to pass through, and a mounting flange is fixed circumferentially to the mounting hole. The ultrasonic transmitting probe is threadedly connected to the mounting flange. The mounting structure of the ultrasonic receiving probe is the same as that of the ultrasonic transmitting probe.

5. The sheet defect detection apparatus according to claim 2, characterized by: The ultrasonic transmitting probe and the ultrasonic receiving probe are each provided with a protective cover on their outer periphery.

6. The sheet defect detection apparatus according to claim 1, characterized by: The bracket includes a base, two columns fixed on the base and arranged opposite each other, and an upper crossbeam and a lower crossbeam fixed between the two columns. The signal transmitting component is installed on the lower crossbeam, and the signal receiving component is installed on the upper crossbeam.

7. The sheet defect detection apparatus according to claim 6, characterized by: The lower crossbeam has a first groove at its lower end for the signal line of the ultrasonic transmitting probe to pass through, and the upper crossbeam has a second groove at its upper end for the signal line of the ultrasonic receiving probe to pass through.

8. The sheet defect detection apparatus according to claim 6, characterized by: The base includes two base beams arranged opposite each other and two base longitudinal beams connected between the two base beams, and the column is vertically fixed on the base longitudinal beams.

9. The sheet defect detection apparatus according to claim 8, characterized by: A reinforcing member connects the column to the longitudinal beam of the base.

10. The sheet defect detection apparatus according to claim 8, characterized by: The base longitudinal beam is provided with foot assemblies at both ends. The foot assemblies include fixed feet and lifting feet. The fixed feet are L-shaped and fixed to the side of the base longitudinal beam away from the base crossbeam. The lifting feet are threaded to the base longitudinal beam and located below the base longitudinal beam.

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