Automatic bolt defect screening equipment

Abstract

This utility model relates to the technical field of metal parts inspection equipment, specifically an automatic bolt defect screening device. It includes a worktable and a screening disc rotatably positioned at the center of the worktable. The worktable also has a feeding station, a scanning station, and a unloading station arranged circumferentially around the screening disc. The screening disc is further equipped with multiple rotating limiting mechanisms arranged in an array around its center. Each rotating limiting mechanism includes a turntable, a driving component, and a telescopic clamping assembly mounted on the turntable. The screening disc has several installation channels, and the turntable is rotatably positioned within these channels via the driving component. The surface of the turntable is flush with the surface of the screening disc. The center of the turntable is a bolt placement area, and the telescopic clamping assemblies are symmetrically arranged on both sides of the placement area to clamp and limit the bolt heads in the placement area. This utility model solves the technical problem of the limited applicability of limiting and fixing rings in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of metal parts inspection equipment, specifically to an automatic bolt defect screening device. Background Technology

[0002] In modern industrial production, bolts are widely used fasteners, and their quality directly affects the safe and stable operation of various mechanical equipment. Therefore, after bolt production, rigorous defect inspection must be carried out to ensure that bolts put into use meet quality standards. Currently, optical inspection methods, with their advantages of high precision and high efficiency, are widely used in the field of bolt defect inspection.

[0003] However, existing optical inspection equipment typically requires multiple cameras to photograph bolts from different angles to achieve omnidirectional inspection, thus increasing the cost of the equipment. To address this issue, Chinese Patent Publication No. CN114264250A provides a bolt thread inspection device, which includes a worktable, a conveyor turntable, and a control unit. Several support frames are evenly fixed to the side wall of the conveyor turntable, and each support frame is rotatably connected to a limit ring. The upper end of the limit ring has a limiting groove for the bolt head to engage. By using a driving component to drive the limit ring, the bolt rotates 360°. When the bolt passes the screw camera, the screw camera can photograph the bolt. This design only requires one screw camera to achieve omnidirectional imaging of the thread, thereby reducing the cost of the inspection equipment.

[0004] While the aforementioned existing technology can achieve omnidirectional imaging of threads, it still has the following technical problems: during use, the bolt head is clamped by the limiting groove on the limiting ring. However, bolt heads come in various types, while the limiting groove can only be used for a specific type, resulting in a limited range of applicable types. Furthermore, if multiple types of bolts are to be accommodated, the limiting ring needs to be replaced before each use. However, in the existing technology, the limiting ring is fixedly sleeved with the drive gear ring, making it very inconvenient to disassemble and replace. Utility Model Content

[0005] This utility model provides an automatic bolt defect screening device, which can solve the technical problem of the limited applicability of the limiting fixing ring in the prior art.

[0006] This application provides the following technical solution:

[0007] An automatic bolt defect screening device includes a worktable and a screening disc rotatably positioned at the center of the worktable. The worktable also includes a feeding station, a photographing station, and a unloading station arranged circumferentially around the screening disc. The screening disc is further equipped with multiple rotation limiting mechanisms arranged in an array around its center. Each rotation limiting mechanism includes a turntable, a driving component, and telescopic clamping components mounted on the turntable. The screening disc has several installation channels, and the turntable is rotatably positioned within these channels via the driving component. The surface of the turntable is flush with the surface of the screening disc. The center of the turntable is a bolt placement area, and the telescopic clamping components are symmetrically positioned on both sides of the placement area to clamp and limit the bolt heads in the placement area.

[0008] Beneficial effects:

[0009] 1. By symmetrically arranging the telescopic clamping components on both sides of the bolt placement area, the telescopic adjustment can be made according to the size or type of the bolt head, accommodating various types of bolts. This effectively solves the problem of the limited applicability of existing limit grooves, improving the versatility and applicability of the equipment. Furthermore, using the telescopic clamping components to hold and fix the bolts ensures their stability, preventing displacement or tilting of the bolts as they rotate with the screening disc and turntable.

[0010] 2. Because different workstations are arranged in an orderly manner on the workbench, when the bolt rotates with the screening disc to the shooting position, the drive component drives the turntable to rotate 360°, thereby causing the bolt to rotate one revolution at the shooting position. This achieves the purpose of shooting the thread from all directions through a single camera device, reducing the cost of use. Moreover, during the shooting inspection, the bolt is fixed by the telescopic clamping component, which avoids shaking when the bolt rotates, improves the accuracy of the shooting, ensures the precision of the screening, and reduces the possibility of misjudgment.

[0011] Furthermore, a mounting bracket is provided at the bottom of the screening disc, and the drive component is mounted on the mounting bracket. The power output end of the drive component is fixedly connected to the turntable, and the drive component is used to drive the turntable to rotate 360°.

[0012] Beneficial effects: By placing the drive unit on the mounting bracket at the bottom of the screening plate, the space under the equipment is fully utilized, making the overall structure more compact and reasonable; this layout avoids the need to set up additional drive units around the screening plate or in other locations, reducing the equipment's footprint.

[0013] Furthermore, the telescopic clamping assembly includes a cylinder and a clamping block. The clamping block is fixedly connected to the piston rod of the cylinder, and the cylinder drives the clamping block to clamp both sides of the bolt head.

[0014] Beneficial effects: Once the bolt is placed in the bolt placement area of ​​the turntable, the cylinder can quickly drive the clamping block to extend and clamp the bolt head, reducing the processing time for a single bolt and thus improving the overall efficiency of the screening equipment, meeting the rapid screening needs of large-scale production. Furthermore, the output force of the cylinder can be adjusted by regulating the air pressure, allowing for flexible adjustment of the clamping force on the bolt head according to different types and materials of bolts.

[0015] Furthermore, the turntable is also equipped with a lifting platform, which includes a telescopic component and a platform. The turntable has an installation slot, the telescopic component is installed in the installation slot, and the platform is slidably installed in the installation slot. The platform is driven to move up and down in the installation slot by the telescopic component.

[0016] Furthermore, bolts or telescopic clamping components are installed on the lifting platform.

[0017] Beneficial effects: When the bolt is placed on the lifting platform, the telescopic clamping assembly retracts at the unloading station. At this time, the lifting platform lifts the bolt upward, making it easier to push the bolt into the unloading hopper and reducing interference from the telescopic clamping assembly. If the telescopic clamping assembly is placed on the lifting platform, when the bolt is transported to the unloading station, the lifting platform moves the telescopic clamping assembly downward into the installation slot, avoiding interference with the bolt unloading.

[0018] Furthermore, the feeding station is equipped with a feeding channel, the feeding end of which is connected to a feeding vibratory feeder, and the discharge port of the feeding channel is aligned with the placement area of ​​the turntable.

[0019] Furthermore, the shooting station is equipped with a mounting base and an industrial camera, which is electrically connected to a controller.

[0020] Furthermore, the unloading station includes a good product unloading station and a defective product unloading station. The unloading station is equipped with an unloading assembly, which includes a hopper, a material pipe, and an air nozzle. The inlet of the hopper is close to the outer circumference of the screening disc, and the outlet of the hopper is connected to the material pipe. The air nozzle is installed on the hopper through an adjustment assembly and faces the inlet of the hopper, and is used to blow the bolts into the hopper.

[0021] Beneficial effects: Traditional contact unloading methods, such as robotic arm gripping or pusher pushing, may cause friction and collision with the bolt surface, resulting in scratches, wear and other damage to the bolt surface; while the air nozzle uses non-contact unloading, using airflow to blow the bolt into the hopper, avoiding direct contact with the bolt, and effectively protecting the integrity of the bolt surface. For bolts with high surface quality requirements, such as bolts used in high-precision instruments or products with strict appearance requirements, this method can ensure that their surface quality is not affected by the unloading process.

[0022] Furthermore, the adjustment component includes an L-shaped bracket, on which several adjustment holes are provided on both the horizontal and vertical sides. The horizontal side of the L-shaped bracket is fixed to the hopper by fasteners, and the air nozzle is fixed to the adjustment hole on the vertical side of the L-shaped bracket. The air nozzle is connected to a compressed air device through a pipe.

[0023] Beneficial effects: By setting up an L-shaped bracket and adjustment holes, it is easy to flexibly adjust the horizontal position and vertical height of the air nozzle according to the model or type of bolt, so as to ensure the unloading effect of the airflow.

[0024] Furthermore, protective pads are installed on the inner walls of both the hopper and the feed pipe.

[0025] Beneficial effect: The protective pads protect the bolts during unloading, preventing them from impacting the inner wall when they fall. Attached Figure Description

[0026] Figure 1 This is a top view of the automatic bolt defect screening device of this utility model;

[0027] Figure 2 This is a cross-sectional view of the automatic bolt defect screening device of this utility model;

[0028] Figure 3 This is a top view of the telescopic clamping assembly (one side of the figure shows the clamping state, and the other side shows the retracted state).

[0029] Figure 4 This is a schematic diagram of the unloading assembly. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method:

[0031] The markings in the accompanying drawings include: workbench 1, feeding station 11, shooting station 12, defective product unloading station 13, good product unloading station 14, screening tray 2, rotation limit mechanism 3, turntable 31, mounting slot 311, drive component 32, mounting bracket 321, telescopic clamping assembly 33, clamping block 331, cylinder 332, lifting platform 34, platform 341, telescopic component 342, feeding channel 4, mounting base 51, industrial camera 52, unloading assembly 7, hopper 71, material pipe 72, air nozzle 73, L-shaped bracket 8, adjustment hole 81, bolt 100.

[0032] Example

[0033] like Figure 1As shown, the automatic bolt defect screening equipment includes a workbench 1 and a screening disc 2 rotatably disposed at the center of the workbench 1. The workbench 1 also has a feeding station 11, a shooting station 12, and a discharging station arranged circumferentially around the screening disc 2. Specifically, the feeding station 11 has a feeding channel 4, the feeding end of which is connected to a feeding vibrating plate (not shown in the figure), and the discharge port of the feeding channel 4 is aligned with the bolt 100 placement area on the screening disc 2. The shooting station 12 has a mounting base 51 and an industrial camera 52, which is electrically connected to a controller. The devices installed at the feeding station 11 and the shooting station 12 are commonly used in existing optical screening equipment, and this embodiment does not improve upon them; therefore, they will not be described in detail here.

[0034] The screening disc 2 is also equipped with multiple rotating limiting mechanisms 3 arranged in an array with the center of the screening disc 2 as the center, such as Figure 2-3 As shown, the rotation limiting mechanism 3 includes a turntable 31, a driving component 32, and a telescopic clamping assembly 33 disposed on the turntable 31. The screening disc 2 has several installation channels, and the turntable 31 is rotatably disposed within these channels via the driving component 32. The surface of the turntable 31 is flush with the surface of the screening disc 2. The center of the turntable 31 is a bolt 100 placement area, and the telescopic clamping assembly 33 is symmetrically disposed on both sides of the placement area to clamp and limit the bolt heads in the placement area. Figure 3 As shown, the telescopic clamping assembly 33 includes a cylinder 332 and a clamping block 331. The clamping block 331 is fixedly connected to the piston rod of the cylinder 332, and the cylinder 332 drives the clamping block 331 to clamp both sides of the bolt head.

[0035] Specific examples Figure 2 As shown, a mounting bracket 321 is connected to the bottom of the screening disc 2 by bolts 100. A drive component 32 is mounted on the mounting bracket 321, and its power output end is fixedly connected to the turntable 31. The drive component 32 drives the turntable 31 to rotate 360°. In this embodiment, the drive component 32 is a motor, specifically a small motor. By mounting the drive component 32 on the mounting bracket 321 at the bottom of the screening disc 2, the space below the equipment is fully utilized, making the overall structure more compact and reasonable. This layout avoids the need for additional drive devices around the screening disc 2 or in other locations, reducing the equipment's footprint.

[0036] In this embodiment, a lifting platform 34 is also provided on the turntable 31. The lifting platform 34 includes a telescopic member 342 and a platform 341. An installation groove 311 is provided on the turntable 31. The telescopic member 342 is disposed in the installation groove 311, and the platform 341 is slidably disposed in the installation groove 311. The platform 341 is driven to move up and down in the installation groove 311 by the telescopic member 342. The telescopic member 342 can be an existing telescopic component such as a cylinder or an electric push rod.

[0037] Bolt 100 or telescopic clamping assembly 33 is mounted on lifting platform 34. When bolt 100 is mounted on lifting platform 34, telescopic clamping assembly 33 retracts at unloading station. At this time, lifting platform 34 drives bolt 100 to rise, making it easier to push bolt 100 into unloading hopper 71 and reducing interference from telescopic clamping assembly 33. If telescopic clamping assembly 33 is mounted on lifting platform 34, when bolt 100 is transported to unloading station, lifting platform 34 drives telescopic clamping assembly 33 to move down into mounting groove 311, avoiding interference with unloading bolt 100. This embodiment specifically uses the example of telescopic clamping assembly 33 mounted on lifting platform 34 for detailed explanation.

[0038] like Figure 1 As shown, the unloading station includes a good product unloading station 14 and a defective product unloading station 13. An unloading assembly 7 is installed at the unloading station, such as... Figure 4 As shown, the unloading assembly 7 includes a hopper 71, a feed pipe 72, and an air nozzle 73. The inlet of the hopper 71 is close to the outer circumference of the screening disc 2, and the outlet of the hopper 71 is connected to the feed pipe 72. The air nozzle 73 is installed on the hopper 71 through an adjusting assembly and faces the inlet of the hopper 71, used to blow the bolt 100 into the hopper 71. In this embodiment, protective pads are provided on the inner walls of both the hopper 71 and the feed pipe 72 to protect the bolt 100 during unloading and prevent it from impacting the inner wall during falling.

[0039] Specifically, the adjustment assembly includes an L-shaped bracket 8, with several adjustment holes 81 on both its horizontal and vertical sides. The horizontal side of the L-shaped bracket 8 is fixed to the hopper 71 by fasteners. A threaded rod is provided at the tail of the air nozzle 73, which is then fixed to the adjustment hole 81 on the vertical side of the L-shaped bracket 8. The air nozzle 73 is connected to a compressed air device via a pipe. By providing the L-shaped bracket 8 and the adjustment holes 81, the horizontal position and vertical height of the air nozzle 73 can be flexibly adjusted according to the model or type of the bolt 100, ensuring effective unloading of materials.

[0040] In use, the bolt 100 to be tested is poured into the vibratory feeder, which transports the bolt 100 to the feeding channel 4. Then, it falls from the feeding channel 4 to the placement area of ​​the turntable 31 of the screening tray 2. By activating the cylinder 332, the piston rod of the cylinder 332 extends and drives the clamping block 331 to clamp and fix the bolt head. Subsequently, the bolt 100 is transported by the screening tray 2 to the shooting station 12. At this station, the motor drives the turntable 31 to rotate, thereby causing the bolt 100 to rotate 360°, so that the industrial camera 52 can take pictures of the screw from all directions. Then, the bolt 100 is continued to be transported to the unloading station. If the screw is qualified, the air nozzle 73 on the good product unloading station 14 is activated. The air nozzle 73 sprays air to blow the bolt 100 into the hopper 71 and discharges it from the material pipe 72 along the hopper 71. If the screw is defective, the air nozzle 73 on the defective product unloading station 13 is activated to unload the defective product.

[0041] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A bolt flaw automatic screening device, comprising a workbench and a screening disc rotatably arranged at the center of the workbench, and a feeding station, a shooting station and a discharging station are further arranged on the workbench and arranged around the outer periphery of the screening disc; characterized in that, The screening disc is also equipped with multiple rotating limiting mechanisms arranged in an array with the center of the screening disc as the center. The rotating limiting mechanism includes a turntable, a driving component, and a telescopic clamping assembly set on the turntable. The screening disc is provided with several installation channels. The turntable is rotatably set in the installation channels by the driving component. The surface of the turntable is flush with the surface of the screening disc. The center of the turntable is a bolt placement area. The telescopic clamping assemblies are symmetrically arranged on both sides of the placement area to clamp and limit the bolt heads in the placement area.

2. The automatic bolt defect screening equipment according to claim 1, characterized in that: The bottom of the screening disc is provided with a mounting bracket, and the driving component is mounted on the mounting bracket. The power output end of the driving component is fixedly connected to the turntable, and the driving component is used to drive the turntable to rotate 360°.

3. The automatic bolt defect screening equipment according to claim 2, characterized in that: The telescopic clamping assembly includes a cylinder and a clamping block. The clamping block is fixedly connected to the piston rod of the cylinder, and the cylinder drives the clamping block to clamp both sides of the bolt head.

4. The automatic bolt defect screening equipment according to claim 3, characterized in that: The turntable is also equipped with a lifting platform, which includes a telescopic component and a platform. The turntable has an installation groove, the telescopic component is installed in the installation groove, and the platform is slidably installed in the installation groove. The platform is driven to move up and down in the installation groove by the telescopic component.

5. The automatic bolt defect screening equipment according to claim 4, characterized in that: Bolts or telescopic clamping components are installed on the lifting platform.

6. The automatic bolt defect screening device according to any one of claims 1-5, characterized in that: The feeding station is equipped with a feeding channel, and the feeding end of the feeding channel is connected to a feeding vibrating plate. The discharge port of the feeding channel is aligned with the placement area of ​​the turntable.

7. The automatic bolt defect screening equipment according to claim 6, characterized in that: The shooting station is equipped with a mounting base and an industrial camera, which is electrically connected to a controller.

8. The automatic bolt defect screening equipment according to claim 7, characterized in that: The unloading station includes a good product unloading station and a defective product unloading station. The unloading station is equipped with an unloading assembly, which includes a hopper, a material pipe and an air nozzle. The inlet of the hopper is close to the outer circumference of the screening disc, and the outlet of the hopper is connected to the material pipe. The air nozzle is installed on the hopper through an adjustment assembly and faces the inlet of the hopper, and is used to blow the bolts into the hopper.

9. The automatic bolt defect screening equipment according to claim 8, characterized in that: The adjustment component includes an L-shaped bracket, which has several adjustment holes on both its horizontal and vertical sides. The horizontal side of the L-shaped bracket is fixed to the hopper by fasteners, and the air nozzle is fixed to the adjustment hole on the vertical side of the L-shaped bracket. The air nozzle is connected to a compressed air device through a pipe.

10. The automatic bolt defect screening device according to claim 9, characterized in that: Protective pads are provided on the inner walls of both the hopper and the feed pipe.

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