Visual detection device with alternately fixed fasteners

Abstract

The utility model relates to the field of fastener quality detection, in particular to a visual detection device with alternately fixed fasteners. The device comprises a workbench, a plurality of supporting legs are installed below the workbench, a movable visual detection assembly and a plurality of fixing tables arranged along a straight line are installed on the workbench, a rotating structure is installed at the bottom of each fixing table, and an electromagnetic positioning structure and an auxiliary positioning structure are arranged on each fixing table; according to the device, detection, feeding and discharging of the fastener are carried out alternately, single-thread operation of feeding, detection and discharging is not needed, and the detection efficiency is guaranteed to the maximum extent; the device is provided with a rotating structure, and images at different angles of the surface can be obtained by using a visual probe, so that the detection integrity is ensured; the device is provided with an electromagnetic positioning structure and an auxiliary positioning structure, the fastener is fixed by magnetic force, the installation is simple and convenient, and the fastener is exposed in the visual field of the visual probe to the greatest extent, so that the detection accuracy is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener quality detection field, concretely relates to a fastener visual inspection device with alternate fixation. BACKGROUND

[0002] Visual inspection is to replace the human eye with a machine to measure and judge, and visual inspection refers to converting a target to be taken into an image signal through a machine vision product, transmitting the image signal to a dedicated image processing system, converting the image signal into a digitized signal according to pixel distribution and brightness, color and the like, and extracting the features of the target through various operations on the image signal, and then controlling the action of the equipment on site according to the judgment result.

[0003] A fastener refers to a component for fixing equipment parts, and common fasteners include bolts, nuts and the like. However, in some high requirement equipment installation, the quality of the fastener also has certain requirements. A common way is to use manual or visual identification to detect the appearance of the required bolts and nuts to identify the quality defects of the appearance, so as to prevent the installation of defective products from affecting the equipment. When visual identification is used, a turntable or a jaw is used to clamp or place the fastener to prevent it from falling. However, the detection of these ways requires that part of the side surface of the fastener is in contact with the clamping mechanism, which will cause partial loss in the image shooting process, and only a small amount of angle shooting can be performed, the sample amount is small, and misjudgment is likely to occur, resulting in a large error in the result of visual identification. UTILITY MODEL CONTENT

[0004] The utility model aims at the defects and deficiencies of the prior art, and provides a fastener visual inspection device with alternate fixation, which can solve the above-mentioned defects.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it contains a workbench, a plurality of supporting legs are installed below the workbench, a movable visual inspection assembly and a plurality of fixed tables arranged in a straight line are installed on the workbench, a rotating structure is installed at the bottom of the fixed table, and an electromagnetic positioning structure and an auxiliary positioning structure are arranged on the fixed table.

[0006] Preferably, the movable visual inspection assembly contains a slide rail installed above the workbench, a linear motor installed at the rear side of the workbench, a supporting frame is slidingly installed on the slide rail, the rear end of the supporting frame is connected with the driving slide block of the linear motor, the supporting frame is "L" shaped, a lateral visual probe is installed on the supporting frame towards the front, and a downward-looking visual probe is installed at the top end of the supporting frame.

[0007] Preferably, the electromagnetic positioning structure comprises a movable channel formed on the fixed table, a lifting telescopic cylinder is installed at the bottom of the movable channel, and an electromagnet is drivingly connected to the lifting telescopic cylinder.

[0008] Preferably, the auxiliary positioning structure comprises a plurality of clamping heads movably arranged outside the movable channel of the fixed table, a clamping telescopic cylinder is installed in the fixed table outside each clamping head, and the movable rod of the clamping telescopic cylinder is connected to the clamping head.

[0009] Preferably, the rotating structure comprises a rotating bearing arranged at the bottom of the fixed table, the fixed table is rotatably installed on the workbench through the rotating bearing, a motor is embedded in the workbench, and the rotating shaft of the motor is connected to the fixed table.

[0010] Preferably, the front end of the clamping head is arc-shaped and matched with the shape of the movable channel, and the size of the mouth of the movable channel is larger than the outer shape of the electromagnet when the clamping head is retracted.

[0011] After the above structure is adopted, the beneficial effects of the present application are as follows:

[0012] 1. The detection and feeding of the fastener in the device are alternately performed, and single-thread operations such as feeding, detection and discharging are not required, so that the detection efficiency is maximized.

[0013] 2. The device is provided with a rotating structure, which can drive the fastener to rotate, so that the visual probe can obtain images of different angles of the surface of the fastener, thereby ensuring the completeness of the detection and reducing the detection result deviation caused by insufficient samples.

[0014] 3. The device is provided with an electromagnetic positioning structure and an auxiliary positioning structure, which can fix the fastener by magnetic force and confirm the position of the fastener when it is placed, so that the fastener is located at the center position, the installation is simple and convenient, the fastener is maximized exposed to the field of view of the visual probe, the surface of the fastener is reduced due to clamping and fixing, and the detection accuracy is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front side structure schematic view of the present application;

[0016] Figure 2 is a rear side structure schematic view of the present application;

[0017] Figure 3 is a top view of the fixed table in the present application;

[0018] Figure 4 is a local section view of the present application at the fixed position.

[0019] MARKING DESCRIPTION:

[0020] 1, workbench; 2, support leg; 3, slide rail; 4, linear motor; 5, support frame; 6, lateral visual probe; 7, overhead visual probe; 8, rotary bearing; 9, fixed table; 10, movable channel; 11, clamping head; 12, clamping telescopic cylinder; 13, lifting telescopic cylinder; 14, electromagnet; 15, motor. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Referring to Figures 1-2 As shown in the figure, it comprises a workbench 1, a plurality of support legs 2 are installed below the workbench 1, a movable visual detection assembly and a plurality of fixed tables 9 arranged in a straight line are installed on the workbench 1, the fixed tables 9 are provided with rotary structures at the bottom, and the fixed tables 9 are provided with electromagnetic positioning structures and auxiliary positioning structures.

[0023] Referring to Figures 1-2 As shown in the figure, the movable visual detection assembly comprises a slide rail 3 installed above the workbench 1 and a linear motor 4 installed at the rear side of the workbench 1, a support frame 5 is slidably installed on the slide rail 3, the rear end of the support frame 5 is connected with the driving block of the linear motor 4, the support frame 5 is "L" shaped, a lateral visual probe 6 is installed on the support frame 5 towards the front, and an overhead visual probe 7 is installed on the top end of the support frame 5 towards the bottom.

[0024] As an optimization scheme of the utility model, the linear motor 4 can drive the support frame 5 to move along the slide rail 3, so that the lateral visual probe 6 can shoot the fastener to be detected from the side, and the overhead visual probe 7 can shoot the fastener from the top, so as to determine the quality of the fastener through visual identification.

[0025] Referring to Figures 1-4 As shown in the figure, the electromagnetic positioning structure comprises a movable channel 10 opened on the fixed table 9, a lifting telescopic cylinder 13 is installed at the bottom of the movable channel 10, and an electromagnet 14 is drivingly connected on the lifting telescopic cylinder 13.

[0026] As an optimization scheme of the utility model, the electromagnet 14 can be arranged to adsorb the fastener from the bottom, so as to ensure that the state of the fastener is stable during the detection process and will not vibrate, and the lifting telescopic cylinder 13 can be extended upwards to reach the shooting range of the lateral visual probe 6.

[0027] Referring to Figures 1-4 As shown in the auxiliary positioning structure contains a number of clamping head 11 is movably arranged in the fixed table 9 outside the activity channel 10, each clamping head 11 outside the fixed table 9 is mounted with a clamping telescopic cylinder 12, the movable rod of clamping telescopic cylinder 12 is connected to the clamping head 11, the front end of the clamping head 11 is shaped as an arc matching the shape of the activity channel 10, when the clamping head 11 is retracted, the mouth size of the activity channel 10 is larger than the outer shape of the electromagnet 14.

[0028] As an optimization scheme of the utility model, the clamping telescopic cylinder 12 can drive the clamping head 11 to clamp the side of the fastener, thereby assisting in positioning, to ensure that the position is the center of the activity channel 10, and adjusting the stroke of the clamping telescopic cylinder 12 can be applied to fasteners of different sizes.

[0029] Referring to Figures 1-4 As shown in the rotating structure contains a rotating bearing 8 arranged at the bottom of the fixed table 9, the fixed table 9 is rotatably mounted on the workbench 1 through the rotating bearing 8, and the workbench 1 is embedded with a motor 15, and the rotating shaft of the motor 15 is connected to the fixed table 9.

[0030] As an optimization scheme of the utility model, the rotating bearing 8 is arranged, the fixed table 9 can be rotated by the motor 15, so that the fastener fixed thereon can be rotated, and the lateral visual probe 6 can continuously take pictures and detect the outside of the fastener.

[0031] The use process of the utility model is as follows:

[0032] First, the fastener to be detected is placed in the activity channel 10 of the first fixed table 9, so that the bottom surface of the fastener is placed on the electromagnet 14, then the clamping telescopic cylinder 12 is started to clamp the fastener, then the electromagnet 14 is started to attract the fastener downward, then the clamping telescopic cylinder 12 is retracted, then the lifting telescopic cylinder 13 is started to lift the electromagnet 14 and the attracted fastener, then the linear motor 4 drives the support frame 5 to the rear of the fixed table 9, and the detection starts, the overhead visual probe 7 takes pictures of the top surface of the fastener, then the motor 15 is started, the lateral visual probe 6 obtains multiple images of the fastener from different angles, and comprehensively analyzes the surface quality of the fastener, while the fastener on the previous fixed table 9 is being detected, the fasteners to be detected can be placed on the remaining fixed tables 9 in turn, after the detection of a fastener is completed, the linear motor 4 drives the support frame 5 to the position of the next fixed table 9, so that the detection and feeding of the fastener are alternately performed, without single-thread operation of feeding, detecting and discharging, and the detection efficiency is maximized.

[0033] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A device for visual inspection of alternately fixed fasteners, comprising a worktable (1) under which a number of support legs (2) are mounted, characterised in that: The workbench (1) is provided with a movable visual detection assembly and a plurality of fixed tables (9) arranged in a straight line. The bottom of the fixed table (9) is provided with a rotating structure. The fixed table (9) is provided with an electromagnetic positioning structure and an auxiliary positioning structure. The movable visual detection assembly comprises a slide rail (3) installed above the workbench (1) and a linear motor (4) installed at the rear side of the workbench (1). The slide rail (3) is provided with a support frame (5) slidingly installed thereon. The rear end of the support frame (5) is connected with a driving slide block of the linear motor (4). The support frame (5) is in an "L" shape. The support frame (5) is provided with a lateral visual probe (6) installed thereon and facing forward. The top end of the support frame (5) is provided with a downward-facing visual probe (7).

2. A vision inspection apparatus for fasteners with alternating securement according to claim 1, wherein: The electromagnetic positioning structure comprises a movable channel (10) formed in the fixed table (9). The bottom of the movable channel (10) is provided with a lifting telescopic cylinder (13). The lifting telescopic cylinder (13) is drivingly connected with an electromagnet (14).

3. A vision inspection apparatus for fasteners with alternating securement according to claim 2, wherein: The auxiliary positioning structure comprises a plurality of clamping heads (11) movably arranged outside the movable channel (10) of the fixed table (9). Each clamping head (11) is provided with a clamping telescopic cylinder (12) arranged outside the fixed table (9). The movable rod of the clamping telescopic cylinder (12) is connected with the clamping head (11).

4. A vision inspection apparatus for fasteners with alternating securement according to claim 3, wherein: The rotating structure comprises a rotating bearing (8) arranged at the bottom of the fixed table (9). The fixed table (9) is rotatably installed on the workbench (1) through the rotating bearing (8). The workbench (1) is embedded with a motor (15). The rotating shaft of the motor (15) is connected with the fixed table (9).

5. A vision inspection apparatus for fasteners with alternating securement according to claim 4, wherein: The front end of the clamping head (11) is in an arc shape matched with the shape of the movable channel (10). When the clamping head (11) is retracted, the size of the mouth of the movable channel (10) is larger than the outer shape of the electromagnet (14).

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