A method for detecting gear edge burrs based on visual images

Abstract

The present application discloses a method for detecting burrs on the edge of a gear based on visual images, which is applied in the field of gear burr detection. When a burr is detected by the visual image, the control cabinet will energize the electromagnet. The magnetic force generated by the electromagnet will cause the magnetic movable plate to move, thereby pushing the trigger swing arm, and then the elastically expanded color-developing layer will be colored to facilitate visual detection and identification by the camera, thereby utilizing the vibration characteristics generated by the collision of the burr for visual detection, and the detection quality is high. At the same time, the marking pen will contact the gap with the driven detection wheel under the action of the trigger swing arm to mark, so that the staff can quickly understand the overall deburring quality of this batch of gears by observing the number of marking points, so as to adjust the previous grinding device in time to effectively ensure the deburring effect. The marking pen uses a wipeable solution to facilitate the cleaning of the marking points, and the driven detection wheel can be repeatedly inspected and marked.

Description

Technical Field

[0001] The present application relates to the field of gear burr detection, and in particular to a method for detecting gear edge burrs based on visual images. Background Art

[0002] Gears refer to mechanical components with gears on the wheel rim that continuously mesh to transmit motion and power. During the gear processing, some burrs will be generated, which will affect the meshing effect of the gear pair. Since medium and large gears have high precision requirements, it is necessary to detect burrs on the gear edges after grinding.

[0003] The existing technology usually uses cameras to perform online sampling inspection on gears. Generally, the visual inspection mechanism of the burr detection machine includes a workbench, a fixture, a camera and a visual processing system. The fixture is set on the workbench, and the gear to be inspected is placed on the fixture. The camera is located above the fixture to facilitate visual inspection of the gear. However, the inspection is easily disturbed by dust, such as dust or impurities adhering to the edge of the gear and floating in the air, which will lead to the quality of visual inspection cannot be guaranteed and affect the product qualification rate.

[0004] Therefore, the applicant hypothesized that when two gears mesh, the burrs on the edges of the gears will cause the gears to collide and jump. If detection can be performed based on the collision and vibration characteristics of the gears, the interference caused by dust during traditional visual inspection can be solved, thereby improving the inspection quality. Summary of the Invention

[0005] The present application aims to solve the problem that the inspection process is easily disturbed by dust, such as dust or impurities adhering to the gear edge and floating in the air, which can lead to the quality of visual inspection being unable to be guaranteed and affect the qualified rate of products. Compared with the existing technology, a method for detecting burrs on the gear edge based on visual images is provided, which includes the following steps:

[0006] S1. Place the gear to be inspected on the transmission shaft and use a camera to visually inspect the gear edge. If the gear to be inspected is determined to be burr-free, the operator is notified to replace the next gear to be inspected.

[0007] S2. When a burr is detected on the gear edge, the control cabinet turns on the motor and collision detection component;

[0008] S3. The collision detection assembly drives the driven detection wheel to engage with the gear to be detected. The gear to be detected drives the driven detection wheel to rotate under the drive of the motor;

[0009] S4. When the driven detection wheel vibrates due to burrs, it drives the trigger lever to swing, causing the elastically expanded color-developing layer to develop color for visual inspection and recognition by the camera. Simultaneously, the marking pen marks the top of the driven detection wheel.

[0010] The collision detection assembly includes an adjustment base and a driven detection wheel. The driven detection wheel is located above the adjustment base and slides along the length direction of the adjustment base for engaging with the gear to be detected. A pressure mechanism, a trigger swing rod and a marking cylinder are installed on the adjustment base. When the driven detection wheel is displaced, the driven detection wheel will squeeze the pressure mechanism, and the gas in the pressure mechanism will drive the trigger swing rod to swing. One end of the trigger swing rod is located inside the marking cylinder, and the bottom of the marking cylinder is slidably connected to a marking pen. A magnetic adsorption layer that is adsorbed to the trigger swing rod is fixed on the top of the marking pen.

[0011] When a burr is detected by the visual image, the control cabinet will energize the electromagnet. The magnetic force generated by the electromagnet will cause the magnetic movable plate to move, thereby pushing the trigger swing rod. Then the elastically expanded color-developing layer will develop color to facilitate visual detection and recognition by the camera, thereby utilizing the vibration characteristics generated by the burr collision for visual detection, and achieving high detection quality.

[0012] Optionally, the adjustment base includes a movable plate and an electromagnet, a movable groove matching the movable plate is opened inside the adjustment base, an electromagnet is fixed on one end of the movable groove facing the gear to be detected, and the movable plate is made of magnetic material.

[0013] Optionally, a guide groove is provided on the top of the movable plate, a support shaft is slidably connected inside the guide groove, and the top of the support shaft passes through the adjustment base.

[0014] Optionally, the portion of the support shaft that passes through the adjustment base is rotatably connected to the driven detection wheel, and the driven detection wheel has the same diameter as the gear to be detected.

[0015] Optionally, the pressure mechanism includes a piston chamber opened on the movable plate, a piston rod is slidably connected to the inside of the piston chamber, and a compression spring is fixed between the piston rod and the inner wall of the piston chamber, and one end of the piston rod away from the compression spring is fixed to the support shaft.

[0016] Optionally, a bracket is provided on the side of the driven detection wheel away from the detection gear, and one end of the bracket is fixed to the support shaft. The bracket is L-shaped and has an arc groove. The middle of the arc groove is rotatably connected to a rotating shaft, and the outer side of the rotating shaft is fixed to the trigger swing rod.

[0017] Optionally, an air inlet is opened at one end of the inner wall of the arc-shaped groove, and the air inlet is connected to the piston cavity through a hose, and the arc-shaped groove is sealed.

[0018] Optionally, the marking tube is fixed to the support shaft through an extension portion, a support spring is sleeved on the outside of the marking pen, and the bottom of the support spring is fixed to the marking tube.

[0019] Optionally, a swing groove for accommodating the swing of the trigger swing rod is provided on the marking tube, and a strong magnet is embedded in the portion of the trigger swing rod located in the swing groove.

[0020] Optionally, a warning groove is opened inside the marking tube, and the warning groove is located above the trigger swing rod. A magnetic adsorption block slides inside the warning groove, and the magnetic adsorption block has opposite magnetism to the strong magnet. A push spring is fixed at the bottom of the magnetic adsorption block, and an elastic expansion color-developing layer is fixed at the top of the warning groove.

[0021] Compared with the existing technology, the advantages of this application are:

[0022] (1) When the visual image detects a burr, the control cabinet will energize the electromagnet. The magnetic force generated by the electromagnet will cause the magnetic movable plate to move, thereby pushing the trigger swing rod, and then the elastically expanded color-developing layer will be colored to facilitate visual detection and identification by the camera, thereby utilizing the vibration characteristics generated by the burr collision for visual detection, and the detection quality is high. At the same time, the marking pen will contact the gap with the driven detection wheel under the action of the trigger swing rod to mark, so that the staff can quickly understand the overall deburring quality of this batch of gears by observing the number of marking points, so as to adjust the previous grinding device in time and effectively ensure the deburring effect. The marking pen uses a wipeable solution to facilitate cleaning of the marking points, and the driven detection wheel can be repeatedly detected and marked. In addition, the present application utilizes the vibration generated by the burr collision for visual detection, which is not easily affected by external dust and other interferences, effectively improving the accuracy of detection.

[0023] (2) When the trigger swing arm separates from the swing slot, the marking pen, pushed by the support spring, will contact the gap with the driven detection wheel to mark it, so that the staff can quickly understand the quality of this batch of gears by observing the number of marking points. The marking pen uses an erasable solution for easy cleaning.

[0024] (3) When the trigger swing rod is separated from the swing slot, the magnetic adsorption block loses its magnetic constraint and moves upward under the push of the push spring, thereby causing the elastic expansion color development layer to expand and develop color, making it easier for the camera to identify it.

[0025] (4) The thrust exerted by the compression spring on the piston rod allows the driven detection wheel to quickly reset after the collision. Since the arc groove is sealed, the gas pressure will drive the trigger swing rod to reset, thereby realizing the reciprocating swing of the trigger swing rod.

[0026] (5) The bracket is fixed to the support shaft, so the bracket can move synchronously with the support shaft, thereby driving the trigger swing rod to move synchronously, so that the movement of the driven detection wheel will not interfere with the movement of the trigger swing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0028] Figure 2 This is a schematic diagram of the top view of the structure of this application;

[0029] Figure 3 This is a side view schematic diagram of the structure of this application;

[0030] Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the adjustment base of this application;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustment base of this application;

[0032] Figure 6 This is a schematic diagram of the meshing structure of the driven detection wheel of this application;

[0033] Figure 7 This is a schematic diagram of the swing structure of the trigger swing rod of this application;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the marking pen of this application;

[0035] Figure 9 This is a schematic diagram of the cross-sectional structure of the marking pen of this application;

[0036] Figure 10 This is a schematic diagram of the motion state structure of the marking pen of this application.

[0037] Description of the numbers in the figure:

[0038] 1. Gear to be tested; 2. Transmission shaft; 3. Camera; 4. Adjustment base; 5. Driven detection wheel; 6. Trigger swing lever; 7. Marking cylinder; 8. Marking pen; 9. Movable plate; 10. Electromagnet; 11. Support shaft; 12. Piston rod; 13. Bracket; 14. Air inlet; 15. Strong magnet; 16. Magnetic adsorption block; 17. Elastic expansion color-developing layer. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] Example 1:

[0041] This application discloses a method for detecting burrs on gear edges based on visual images. Figure 1-3 , including the following steps:

[0042] S1. Place the gear 1 to be inspected on the transmission shaft 2 and perform a visual inspection of the gear edge using a camera 3. If the gear to be inspected is found to be burr-free, the operator is alerted to replace the next gear to be inspected.

[0043] S2. When a burr is detected on the gear edge, the control cabinet turns on the motor and collision detection component;

[0044] S3. The collision detection assembly drives the driven detection wheel 5 to engage with the gear to be detected 1, and the gear to be detected 1 drives the driven detection wheel 5 to rotate under the drive of the motor;

[0045] S4. When the driven detection wheel 5 vibrates due to burrs, it drives the trigger lever 6 to swing, and then the elastically expanded color layer 17 will develop color to facilitate visual detection and recognition by the camera 3, while the marking pen 8 will mark the top of the driven detection wheel 5;

[0046] The collision detection assembly includes an adjusting base 4 and a driven detection wheel 5, wherein the adjusting base 4 is fixed to the workbench, the driven detection wheel 5 is located above the adjusting base 4, and the driven detection wheel 5 slides along the length direction of the adjusting base 4, and is used to engage with the gear 1 to be detected. A pressure mechanism, a trigger swing rod 6 and a marking cylinder 7 are installed on the adjusting base 4. When the driven detection wheel 5 is displaced, the driven detection wheel 5 will squeeze the pressure mechanism, and the gas in the pressure mechanism will drive the trigger swing rod 6 to swing. One end of the trigger swing rod 6 is located inside the marking cylinder 7, and the bottom of the marking cylinder 7 is slidably connected to a marking pen 8. A magnetic adsorption layer adsorbed to the trigger swing rod 6 is fixed on the top of the marking pen 8, and the magnetic adsorption layer is opposite to the strong magnet 15.

[0047] See also Figure 3-5 The adjusting base 4 includes a movable plate 9 and an electromagnet 10. A movable groove matching the movable plate 9 is opened inside the adjusting base 4. The electromagnet 10 is fixed to one end of the movable groove facing the gear 1 to be detected. The movable plate 9 is made of magnetic material. A guide groove is opened on the top of the movable plate 9. A support shaft 11 is slidably connected inside the guide groove, and the top of the support shaft 11 passes through the adjusting base 4. The part of the support shaft 11 passing through the adjusting base 4 is rotatably connected to the driven detection wheel 5, and the driven detection wheel 5 has the same diameter as the gear 1 to be detected.

[0048] When inspecting for burrs, the operator places the gear 1 to be inspected on the transmission shaft 2. The camera 3 then takes a picture of the gear and compares the captured image with a preset image to determine whether any burrs remain. If the inspection result shows no burrs, the control cabinet receives a signal and issues a reminder to the operator to replace the next gear for inspection.

[0049] When a burr is detected, the control cabinet will energize the electromagnet 10. The magnetic force generated by the electromagnet 10 will cause the magnetic movable plate 9 to move, thereby driving the driven detection wheel 5 to approach the gear 1 to be detected until it engages with it. Subsequently, the control cabinet starts the motor, and the motor output end drives the gear 1 to be detected to rotate through the transmission shaft 2. The gear 1 to be detected synchronously drives the engaged driven detection wheel 5 to rotate. Since the gear 1 to be detected will collide with the driven detection wheel 5 due to the burr when it rotates, the driven detection wheel 5 is movably mounted on the movable plate 9 through the support shaft 11. Therefore, the driven detection wheel 5 will be displaced to buffer the collision force.

[0050] See also Figure 4-7 The pressure mechanism includes a piston cavity provided on the movable plate 9, a piston rod 12 is slidably connected to the inside of the piston cavity, and a compression spring is fixed between the piston rod 12 and the inner wall of the piston cavity, and the end of the piston rod 12 away from the compression spring is fixed to the support shaft 11. The thrust applied to the piston rod 12 by the compression spring enables the driven detection wheel 5 to be quickly reset after the collision, thereby constraining the moving distance of the driven detection wheel 5, so that the driven detection wheel 5 can always be in a meshing state with the gear 1 to be detected, and the driven detection wheel 5 is away from the detection belt. A bracket 13 is provided on one side of the measuring gear, and one end of the bracket 13 is fixed to the support shaft 11. The bracket 13 is L-shaped and has an arc-shaped groove. A rotating shaft is rotatably connected to the middle of the arc-shaped groove, and the outer side of the rotating shaft is fixed to the trigger swing rod 6. An air inlet 14 is provided at one end of the inner wall of the arc-shaped groove, and the air inlet 14 is connected to the piston cavity through a hose. The arc-shaped groove is sealed. In addition, when the support shaft 11 is displaced, it will push the piston rod 12, and the piston rod 12 will squeeze the gas into the arc-shaped groove, thereby pushing the trigger swing rod 6.

[0051] See also Figure 3 and Figure 8-10 The marking tube 7 is fixed to the support shaft 11 through an extension part, a support spring is sleeved on the outside of the marking pen 8, and the bottom of the support spring is fixed to the marking tube 7. A swing groove is provided on the marking tube 7 to accommodate the swing of the trigger swing rod 6. A strong magnet 15 is embedded in the part of the trigger swing rod 6 located in the swing groove. A warning groove is provided inside the marking tube 7, and the warning groove is located above the trigger swing rod 6. A magnetic adsorption block 16 slides inside the warning groove, and the magnetic adsorption block 16 has opposite magnetic properties to the strong magnet 15. A push spring is fixed to the bottom of the magnetic adsorption block 16, and an elastic expansion color-developing layer 17 is fixed to the top of the warning groove.

[0052] At the same time, when the trigger swing rod 6 is separated from the swing slot, the marking pen 8 will lose the magnetic constraint of the strong magnet 15, and the marking pen 8 will be pushed by the supporting spring to make gap contact with the driven detection wheel 5 for marking, so that the staff can quickly understand the overall deburring quality of this batch of gears by observing the number of marking points, so as to adjust the previous grinding device in time to effectively ensure the deburring effect, and the marking pen 8 uses a wipeable solution for easy cleaning. At the same time, the magnetic adsorption block 16 loses its magnetic constraint, and the magnetic adsorption block 16 will move upward under the push of the pushing spring, so that the elastic expansion color development layer 17 will expand and color, which is convenient for the camera 3 to identify. It should be noted that the elastic expansion color development layer 17 is initially located inside the marking tube 7, so it is not easy to be photographed by the camera 3, and the present application uses the vibration generated by the collision of burrs for visual detection, which is not easily affected by external dust and other interferences, effectively improving the accuracy of detection.

[0053] When the visual image detects a burr, the control cabinet will energize the electromagnet 10. The magnetic force generated by the electromagnet 10 will cause the magnetic movable plate 9 to move, thereby driving the driven detection wheel 5 to approach the gear 1 to be detected until it engages with it. Then, the control cabinet starts the motor, and the motor output end drives the gear 1 to be detected to rotate through the transmission shaft 2. The gear 1 to be detected synchronously drives the engaged driven detection wheel 5 to rotate. Since the gear 1 to be detected will collide with the driven detection wheel 5 due to the burr when it rotates, the driven detection wheel 5 will be displaced to buffer the collision force. When the support shaft 11 is displaced, it will push the piston rod 12, and the piston rod 12 will squeeze the gas into the arc groove, thereby pushing the trigger swing rod 6, and then the elastically expanded color-developing layer 17 will be colored to facilitate visual detection and identification by the camera 3. At the same time, the marking pen 8 will mark the top of the driven detection wheel 5 for detection.

[0054] The above are only preferred specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed in the present application based on the technical solution and its improved ideas, which should be covered by the protection scope of the present application.

Claims

1. A method for detecting burrs on gear edges based on visual images, characterized in that: The following steps are involved: S1. Place the gear to be inspected (1) on the transmission shaft (2) and perform a visual inspection of the gear edge using a camera (3). When the gear to be inspected is determined to be free of burrs, the staff is reminded to replace the next gear to be inspected. S2. When a burr is detected on the gear edge, the control cabinet turns on the motor and collision detection component; S3. The collision detection assembly drives the driven detection wheel (5) to engage with the gear to be detected (1), and the gear to be detected (1) drives the driven detection wheel (5) to rotate under the drive of the motor; S4. When the driven detection wheel (5) vibrates due to burrs, it drives the trigger swing lever (6) to swing, and then the elastically expanded color development layer (17) will develop color to facilitate visual detection and recognition by the camera (3), and at the same time, the marking pen (8) will mark the top of the driven detection wheel (5); The collision detection assembly comprises an adjustment base (4) and a driven detection wheel (5), wherein the driven detection wheel (5) is located above the adjustment base (4) and slides along the length direction of the adjustment base (4) for engaging with the gear to be detected (1), and a pressure mechanism, a trigger swing rod (6) and a marking cylinder (7) are installed on the adjustment base (4). When the driven detection wheel (5) is displaced, the driven detection wheel (5) presses the pressure mechanism, and the gas in the pressure mechanism drives the trigger swing rod (6) to swing, one end of the trigger swing rod (6) is located inside the marking cylinder (7), and a marking pen (8) is slidably connected to the bottom of the marking cylinder (7), and a magnetic adsorption layer adsorbed to the trigger swing rod (6) is fixed on the top of the marking pen (8).

2. The method for detecting burrs on gear edges based on visual images according to claim 1, characterized in that: The adjustment base (4) comprises a movable plate (9) and an electromagnet (10). A movable groove matching the movable plate (9) is provided inside the adjustment base (4). The electromagnet (10) is fixed to one end of the movable groove facing the gear (1) to be detected. The movable plate (9) is made of magnetic material.

3. The method for detecting burrs on gear edges based on visual images according to claim 2, characterized in that: A guide groove is provided on the top of the movable plate (9), a support shaft (11) is slidably connected inside the guide groove, and the top of the support shaft (11) passes through the adjustment base (4).

4. The method for detecting gear edge burrs based on visual images according to claim 3, characterized in that: The portion of the support shaft (11) that passes through the adjustment base (4) is rotatably connected to the driven detection wheel (5), and the driven detection wheel (5) and the gear to be detected (1) have the same diameter.

5. The method for detecting burrs on gear edges based on visual images according to claim 3, characterized in that: The pressure mechanism includes a piston cavity provided on a movable plate (9), a piston rod (12) being slidably connected to the interior of the piston cavity, a compression spring being fixed between the piston rod (12) and the inner wall of the piston cavity, and an end of the piston rod (12) away from the compression spring being fixed to a support shaft (11).

6. The method for detecting burrs on gear edges based on visual images according to claim 5, characterized in that: A bracket (13) is provided on the side of the driven detection wheel (5) away from the detection gear, and one end of the bracket (13) is fixed to the support shaft (11). The bracket (13) is L-shaped and has an arc-shaped groove. A rotating shaft is rotatably connected to the middle of the arc-shaped groove, and the outer side of the rotating shaft is fixed to the trigger swing rod (6).

7. The method for detecting gear edge burrs based on visual images according to claim 6, characterized in that: An air inlet (14) is provided at one end of the inner wall of the arc-shaped groove, and the air inlet (14) is communicated with the piston cavity through a hose.

8. The method for detecting gear edge burrs based on visual images according to claim 6, characterized in that: The marking tube (7) is fixed to the support shaft (11) via an extension portion, a support spring is sleeved on the outside of the marking pen (8), and the bottom of the support spring is fixed to the marking tube (7).

9. The method for detecting gear edge burrs based on visual images according to claim 8, characterized in that: The marking tube (7) is provided with a swing groove for accommodating the swing of the trigger swing rod (6), and a strong magnet (15) is embedded in the portion of the trigger swing rod (6) located in the swing groove.

10. The method for detecting gear edge burrs based on visual images according to claim 1, characterized in that: A warning groove is provided inside the marking tube (7), and the warning groove is located above the trigger swing rod (6). A magnetic adsorption block (16) slides inside the warning groove, and the magnetic adsorption block (16) has opposite magnetic properties to the strong magnet (15). A push spring is fixed at the bottom of the magnetic adsorption block (16), and an elastic expansion color development layer (17) is fixed at the top of the warning groove.

Images