Screw detection equipment based on thread rolling forming

Abstract

The screw detection equipment comprises a screw transfer assembly, the screw transfer assembly comprises a driving part, a lower transfer disc, a transfer part and a conveying part, the lower transfer disc is arranged at the output end of the driving part, and the transfer part comprises an outer limiting part located above the lower transfer disc; a base plate installed at the output end of the driving part is arranged on the inner side of the outer limiting part, a rotating part for driving screws to be rotationally conveyed is arranged on the side, away from the driving part, of the base plate, the conveying part comprises an outer cover shell communicated with a feeding port of the outer limiting part, and a conveying belt for rotationally conveying is arranged on the inner side of the outer cover shell. Therefore, a plurality of execution components are synchronously driven to work cooperatively through single drive, it is ensured that the rhythms of all the rings are accurately matched, automatic detection of feeding, transferring, sliding, detecting and discharging of the thread rolling screws is achieved, discharging is uniform and controllable, and the overall efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of screw inspection, and more particularly to a screw inspection device based on thread rolling. Background Technology

[0002] Screws, as metal fasteners, come in various models and categories, and are widely used in engineering installations of stainless steel plates, metal plates, galvanized steel plates, etc., as well as in assembly projects for automobile bodies, cargo containers, shipbuilding, and refrigeration equipment. The threads on the outer wall of a screw are machined from the outer surface of a cylindrical workpiece using a thread rolling machine. A key feature of this process is that it can be formed in one step, allowing for mass production of screws. The thread rolling process is a crucial step in screw manufacturing, directly determining the quality and performance of the screw product. Of the two main parts of screw forming (heading and thread rolling), the thread rolling process, due to its high speed and factors such as bending of the headstock and uneven material feeding, is prone to defects such as incomplete threads, burned threads, and excessively high thread lines.

[0003] Traditional inspection methods rely primarily on manual visual inspection, which presents significant efficiency bottlenecks and potential quality risks. When thread rolling machines operate at high speeds (the rolling plate completes one bolt thread cycle), operators find it difficult to observe whether the bolts have thread irregularities, leading to the production of some defective bolts. As users demand higher standards for thread forming (e.g., requiring the threads to be tightly fitted below the bolt head), defects caused by head misalignment or improper feed during the thread rolling process of the bolt blank become even more difficult to detect in a timely manner. Application content

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this application is to propose a screw inspection device based on thread rolling forming, which synchronously drives multiple actuators to work together through a single drive, ensuring precise matching of the rhythm of each link, realizing automated inspection of thread rolled screws from feeding, transfer, slippage, inspection and unloading, and improving the overall efficiency by making the unloading uniform and controllable.

[0006] To achieve the above objectives, this application proposes a screw inspection device based on thread rolling forming, including a screw transfer assembly. The screw transfer assembly includes a drive component, a lower transfer plate, a transfer component, and a conveyor component. The lower transfer plate is disposed at the output end of the drive component. The transfer component includes an outer limiting part located above the lower transfer plate. A chassis installed at the output end of the drive component is disposed inside the outer limiting part. A rotating part for driving screw rotation and conveying is provided on the side of the chassis opposite to the drive component. The conveyor component includes an outer cover connected to the feed port of the outer limiting part. A conveyor belt for rotating conveying is disposed inside the outer cover.

[0007] The screw inspection equipment based on thread rolling in this application drives multiple actuators to work together synchronously through a single drive, ensuring precise matching of the rhythm of each step. This enables automated inspection of thread-rolled screws from feeding, transfer, slippage, inspection and unloading, resulting in uniform and controllable unloading and improved overall efficiency.

[0008] In addition, the screw inspection device based on thread rolling as proposed above may also have the following additional technical features: Specifically, it also includes an external fixing component, which includes a base, with fixing columns on both sides of the base, a fixing member on one end of the fixing column away from the base, and a feeding component rotatably provided on the side of the fixing member near the lower transfer plate.

[0009] Specifically, the unloading component includes a movable shaft rotatably disposed on one side of the fixed component, a base plate on the other side of the movable shaft, and a material blocking part arranged in a ring array on the other side of the base plate.

[0010] Specifically, the driving component includes a driving part, the output end of the driving part is connected to a rotating shaft, the lower transfer plate is disposed on the outer wall of the rotating shaft, the output end of the driving part is connected to a rotating part, and a driven shaft is sleeved on the end of the rotating part away from the rotating shaft.

[0011] Specifically, the outer limiting part includes an outer limiting cylinder disposed on one side of the fixing member, and a material feeding groove is provided on the inner side of the outer limiting cylinder.

[0012] Specifically, the fixing component includes a fixing support plate installed at one end of the fixing column. The fixing support plate is provided with a through pipe, which is located directly below the material discharge chute, and the diameter of the through pipe is the same as that of the material discharge chute.

[0013] Specifically, the material stop is an arc-shaped material stop plate, and a gap of 0.5 to 1 mm is left between the bottom of the material stop and the lower transfer plate.

[0014] Specifically, the rotating part is a column with an arc-shaped groove on its surface arranged in a ring array, and the inner diameter of the arc-shaped groove is the same as that of the feeding chute.

[0015] Specifically, the rotating part and the chassis are coaxially fixedly connected, and a transmission shaft is connected between the rotating part and the chassis. The transmission shaft is connected to the driven shaft through another set of rotating components.

[0016] Specifically, it also includes a detection component and a collection component. The detection component is located above the lower transfer tray to detect the passing screws, and the collection component is located below the lower transfer tray to collect the qualified screws after detection.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the screw transfer assembly structure of this application; Figure 3 This is a schematic diagram of the external limiting part and the conveying component of this application; Figure 4 This is a schematic diagram of the fastener connection structure of this application; Figure 5 This is a schematic diagram of the material cutting structure for this application.

[0019] As shown in the figure: 10. External fixing component; 101. Base; 102. Fixing column; 103. Fixing component; 1031. Fixing support plate; 1032. Through pipe; 104. Feeding component; 1041. Movable shaft; 1042. Base plate; 1043. Material stop; 20. Screw transfer assembly; 201. Driving component; 2011. Driving part; 2012. Rotating part; 2013. Driven shaft; 202. Lower transfer plate; 203. Transfer part; 2031. External limiting part; 20311. External limiting cylinder; 20312. Feeding chute; 2032. Chassis; 2033. Rotating part; 204. Conveying component; 2041. Outer cover; 2042. Conveyor belt; 30. Detection component; 40. Collection component. Detailed Implementation

[0020] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the appended spirit and connotation.

[0021] In existing technologies, thread defects are easily generated during the high-speed machining process of screw thread rolling, and traditional manual inspection methods are inefficient. Especially in continuous production lines, operators find it difficult to observe the surface condition of screws moving at high speeds in real time, leading to defective products flowing into subsequent processes. For example, on automotive parts assembly lines, where hundreds of screws are produced per minute, manual visual inspection cannot effectively identify defects such as partial threads or abnormal thread height.

[0022] To address these issues, researchers discovered that automated inspection equipment needs continuous transfer and precise positioning capabilities. Traditional conveying mechanisms struggle to maintain screw stability during high-speed movement, resulting in blurry images captured by the vision inspection system. Analysis of the screw's trajectory revealed that rotary conveying fully exposes the threaded area to the inspection zone. Based on this, designers attempted to combine rotary motion with linear conveying to construct a transfer device with multi-level positioning capabilities.

[0023] The screw inspection device based on thread rolling according to an embodiment of this application will be described below with reference to the accompanying drawings.

[0024] like Figure 1-5 As shown in the figure, the screw inspection device based on thread rolling in this application includes a screw transfer assembly 20, which includes a drive component 201, a lower transfer plate 202, a transfer component 203, and a conveyor component 204. The lower transfer plate 202 is disposed at the output end of the drive component 201. The transfer component 203 includes an outer limiting part 2031 located above the lower transfer plate 202. A chassis 2032 installed on the output end of the drive component 201 is disposed inside the outer limiting part 2031. A rotating part 2033 for driving screw rotation and conveying is provided on the side of the chassis 2032 opposite to the drive component 201. The conveyor component 204 includes an outer cover 2041 connected to the feed port of the outer limiting part 2031. A conveyor belt 2042 for rotating and conveying is disposed inside the outer cover 2041.

[0025] It should be noted that the driving component 201 described in this embodiment is a device that provides rotational power, specifically implemented using a servo motor and a reducer, with the conveying rhythm adjusted by controlling the rotational speed. The lower transfer plate 202 is a rotating platform that carries the screw, specifically an aluminum alloy disc to ensure the screw maintains a predetermined position during transport. The outer limiting part 2031 is a guide structure that constrains the radial movement of the screw, implemented using a stainless steel annular cover, with its inner diameter slightly larger than the screw head diameter to form a guide channel. The chassis 2032 is a stainless steel disc integrally formed with the rotating part 2033. The chassis 2032 and the rotating part 2033 are integrally molded, and their size is set according to the size of the rotating part 2033 to ensure that the screw's downward movement is not affected. The rotating part 2033 refers to the contact component that drives the screw to rotate and move, specifically implemented using a cylinder with spiral grooves on its surface, which drives the screw to rotate through frictional interaction. The outer casing 2041 is a protective structure that wraps around the conveying path, made of transparent polycarbonate material, facilitating observation of the internal operating status. The 2042 conveyor belt is a flexible carrier for continuous material transport. It adopts a synchronous belt with an anti-slip texture design to ensure that the screws do not slip during the transport process.

[0026] Specifically, the drive unit 201 drives the lower transfer plate 202 to rotate periodically. The screw to be inspected is driven by the conveyor belt 2042 to be transported to the inner side of the outer limiting part 2031. The screw is limited by the spiral groove on the surface of the transmission part 2033 and moves to the unloading chute 20312 reserved on the inner wall of the outer limiting part 2031, and falls through the unloading chute 20312.

[0027] Specifically, it also includes an external fixing component 10, which includes a base 101. Fixing posts 102 are provided on both sides of the base 101. A fixing member 103 is provided at one end of the fixing post 102 away from the base 101. A feeding member 104 is rotatably provided on the side of the fixing member 103 near the lower transfer plate 202.

[0028] It should be noted that the base 101 forms a symmetrical support structure through the fixed columns 102 on both sides. The fixing part 103 installed at the top of the fixed column 102 provides an installation base for the unloading part 104. The unloading part 104 realizes the rotation function through the movable shaft 1041. When the screw is output from the thread rolling machine, the rotational movement of the unloading part 104 guides the screw to slide down along the channel formed by the stop part 1043.

[0029] Specifically, the unloading component 104 includes a movable shaft 1041 rotatably disposed on one side of the fixed component 103, a base plate 1042 on the other side of the movable shaft 1041, and a baffle portion 1043 arranged in a ring on the other side of the base plate 1042.

[0030] It should be noted that the movable shaft 1041 rotates to drive the base plate 1042 and the stop part 1043 to rotate synchronously, so that the stop part 1043 of the annular array forms a dynamic engagement with the lower transfer plate 202. During the transfer process, the screw is intercepted sequentially by the stop part 1043, and is discharged as the screw rotates along with the stop part 1043. The stop part 1043 refers to the protruding structure used to limit the movement path of the screw. Specifically, it adopts an arc-shaped plate array arranged in annular array on the edge of the base plate 1042, and the discharge of the screw is controlled by the gap.

[0031] Specifically, the drive component 201 includes a drive component 2011, the output end of the drive component 2011 is connected to a rotating shaft, the lower transfer disk 202 is disposed on the outer wall of the rotating shaft, the output end of the drive component 2011 is connected to a rotating component 2012, and the end of the rotating component 2012 away from the rotating shaft is sleeved with a driven shaft 2013.

[0032] It should be noted that the drive component 2011 described in this embodiment refers to a device that provides rotational power, which can be implemented using a servo motor or a stepper motor, and is used to provide controllable rotational power to the rotating shaft and the lower transfer plate 202. The rotating component 2012 is a transmission mechanism connecting the rotating shaft and the driven shaft 2013, which is implemented using a coupling or a conveyor belt, and transmits the rotational power of the rotating shaft to the driven shaft 2013, driving the driven shaft 2013 to rotate synchronously.

[0033] Specifically, the outer limiting part 2031 includes an outer limiting cylinder 20311 disposed on one side of the fixing member 103, and a feeding groove 20312 is provided on the inner side of the outer limiting cylinder 20311.

[0034] It should be noted that the axis of the outer limiting cylinder 20311 coincides with the rotation center of the lower transfer plate 202. The feeding chute 20312 extends along the inner wall of the outer limiting cylinder 20311, and its outlet end extends and connects to the through pipe 1032 located on the fixed support plate 1031. When the screw falls, it passes through the through pipe 1032 and lands stably on the lower transfer plate 202.

[0035] Specifically, the fixing member 103 includes a fixing support plate 1031 installed at one end of the fixing column 102. The fixing support plate 1031 is provided with a through pipe 1032, which is located directly below the material discharge chute 20312, and the through pipe 1032 and the material discharge chute 20312 have the same diameter.

[0036] It should be noted that the fixed support plate 1031 described in this embodiment is connected to the base 101 through the fixed column 102 to form a rigid support structure. The outlet axis of the through pipe 1032 and the discharge chute 20312 coincides. When the screw slides out of the discharge chute 20312 of the outer limit cylinder 20311, the through pipe 1032 is directly facing the discharge chute 20312. The screw will not tilt or get blocked during the transfer process, thus maintaining a stable falling trajectory.

[0037] Specifically, the baffle 1043 is an arc-shaped baffle plate, and a gap of 0.5 to 1 mm is left between the bottom of the baffle 1043 and the lower transfer plate 202.

[0038] It should be noted that the arc-shaped baffle is a plate-shaped structure with a curved profile, specifically made of stainless steel stamping. Its curvature matches the thread profile of the screw's outer wall, and is used to circumferentially limit the screw during rotation.

[0039] Furthermore, the number of stop parts 1043 and each rotation angle are affected by the rotation torque and rotation angle of the movable shaft 1041, so that each rotation of the stop part 1043 will be connected to a screw on the corresponding lower transfer plate 202, thereby satisfying the requirement to perform cyclic inspection of the screws one by one.

[0040] Specifically, the rotating part 2033 is a column with an arc-shaped groove on its surface in an annular array, and the inner diameter of the arc-shaped groove and the feeding chute 20312 are the same.

[0041] It should be noted that the rotating part 2033 refers to the mechanical structure that drives the screw to rotate and be conveyed. It is implemented by a cylinder with multiple arc-shaped grooves on its surface, which conveys the screw along a predetermined path through rotation. The arc-shaped grooves are recessed structures evenly distributed along the surface of the main body, and are implemented by using an arc-shaped contour that matches the outer diameter of the screw. They accommodate and guide the movement of the screw during rotation.

[0042] Specifically, the rotating part 2033 and the chassis 2032 are coaxially fixedly connected, and a transmission shaft is connected between the rotating part 2033 and the chassis 2032. The transmission shaft is connected to the driven shaft 2013 through another set of rotating components 2012.

[0043] It should be noted that the central axes of the rotating part 2033 and the chassis 2032 coincide and are rigidly connected by a mechanical structure to ensure that the two maintain synchronous movement during rotation.

[0044] Furthermore, the drive shaft and the rotating shaft connected to the output end of the drive component 2011 are coaxially aligned, and the drive shaft and the rotating shaft are separated. The drive shaft is positioned at the top center of the outer limiting cylinder 20311 via a bearing. Rotating components 2012 are connected above and below the driven shaft 2013. The upper rotating component 2012 is connected to the drive shaft, while the lower rotating component 2012 is connected to the rotating shaft connected to the output end of the lower drive component 2011. The drive component 2011 synchronously drives the rotating shaft, drive shaft, and driven shaft 2013 to rotate.

[0045] Specifically, it also includes a detection component 30 and a collection component 40. The detection component 30 is located above the lower transfer tray 202 to detect the passing screws, and the collection component 40 is located below the lower transfer tray 202 to collect the qualified screws after detection.

[0046] It should be noted that, in this embodiment, the detection component 30 refers to a device capable of visually inspecting, acquiring and analyzing images of the thread shape on the screw surface. Specifically, it can be implemented using a visual sensor or an optical detection module. Through image acquisition and analysis technology, it can determine in real time whether the screw has defects such as half-thread, burned thread, or excessively high thread.

[0047] The collecting component 40 refers to a device for sorting and conveying qualified screws. Specifically, it can be implemented by a conveyor belt with guide grooves or a pneumatic sorting mechanism. The sorting action is triggered by a preset qualified judgment signal, and the qualified screws are transferred to the designated area.

[0048] Overall workflow: Core working principle: After the screws are produced by the thread rolling machine, they are accurately and orderly transported one by one to the detection component 30 via the screw transfer component 20 on the external fastening component 10 for quality inspection. Finally, according to the inspection mechanism, the collection component 40 sorts and collects the qualified and unqualified screws.

[0049] Feeding and distribution: The screws produced by the thread rolling machine first enter the conveyor belt 2042 in the outer casing 2041. The conveyor belt 2042 drives the screws one by one into the outer limiting cylinder 20311. When entering the outer limiting cylinder 20311, the rotating part 2033 is driven to rotate by the driving component 2011. Then, the screws are driven to be limited one by one by the arc-shaped groove on the surface of the rotating part 2033.

[0050] Transfer and location: During operation, the drive component 2011 drives the driven shaft 2013 and the rotating part 2033 to rotate via the rotating component 2012. The rotating part 2033 drives the screw to pass through the feeding chute 20312. The screw that slides down the feeding chute 20312 falls onto the lower transfer plate 202 through the through pipe 1032.

[0051] Detection and Collection: As the lower transfer tray 202 rotates with the drive component 2011, the screws sequentially pass through the detection component 30. The detection component 30 detects the screws, and after detection, the unloading component 104 removes the detected screws from the lower transfer tray 202. During rotation, the screws are intercepted by the stop part 1043, and then rotate with the lower transfer tray 202, causing the stop part 1043 to rotate and change position, so that the stop part 1043 carrying the screws carries the screws down from the lower transfer tray 202 and onto the collecting component 40.

[0052] In summary, the screw inspection equipment based on thread rolling in this application embodiment drives multiple actuators to work together synchronously through a single drive, ensuring precise matching of the rhythm of each step, realizing automated inspection of thread-rolled screws from feeding, transfer, slippage, inspection and unloading, and improving overall efficiency by ensuring uniform and controllable unloading.

[0053] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A screw inspection device based on thread rolling, characterized in that, It includes a screw transfer assembly (20), which includes a drive component (201), a lower transfer plate (202), a transfer component (203), and a conveyor component (204). The lower transfer plate (202) is disposed at the output end of the drive unit (201); The transfer component (203) includes an outer limiting part (2031) located above the lower transfer plate (202), and a chassis (2032) installed on the output end of the drive component (201) is provided inside the outer limiting part (2031). A rotating part (2033) for driving the screw to rotate and transport is provided on the side of the chassis (2032) away from the drive component (201). The conveying component (204) includes an outer cover (2041) connected to the feed port of the outer limiting part (2031), and a rotating conveyor belt (2042) is provided inside the outer cover (2041).

2. The screw inspection device based on thread rolling as described in claim 1, characterized in that, It also includes an external fixing component (10), which includes a base (101), with fixing posts (102) on both sides of the base (101), and a fixing member (103) on one end of the fixing post (102) away from the base (101), and a feeding member (104) is rotatably provided on the side of the fixing member (103) near the lower transfer plate (202).

3. The screw inspection device based on thread rolling as described in claim 2, characterized in that, The feeding component (104) includes a movable shaft (1041) rotatably disposed on one side of the fixed component (103), a base plate (1042) on the other side of the movable shaft (1041), and a baffle (1043) arranged in a ring array on the other side of the base plate (1042).

4. The screw inspection device based on thread rolling as described in claim 1, characterized in that, The driving component (201) includes a driving component (2011), the output end of which is connected to a rotating shaft. The lower transfer plate (202) is disposed on the outer wall of the rotating shaft. The output end of the driving component (2011) is connected to a rotating component (2012). The rotating component (2012) is sleeved with a driven shaft (2013) at one end away from the rotating shaft.

5. The screw inspection device based on thread rolling as described in claim 2, characterized in that, The outer limiting part (2031) includes an outer limiting cylinder (20311) disposed on one side of the fixing member (103), and a feeding groove (20312) is provided on the inner side of the outer limiting cylinder (20311).

6. The screw inspection device based on thread rolling as described in claim 5, characterized in that, The fixing component (103) includes a fixing support plate (1031) installed at one end of the fixing column (102). The fixing support plate (1031) is provided with a through pipe (1032). The through pipe (1032) is located directly below the material discharge chute (20312), and the through pipe (1032) and the material discharge chute (20312) have the same diameter.

7. The screw inspection device based on thread rolling according to claim 3, characterized in that, The baffle (1043) is an arc-shaped baffle plate, and there is a gap of 0.5 to 1 mm between the bottom of the baffle (1043) and the lower transfer plate (202).

8. The screw inspection device based on thread rolling as described in claim 5, characterized in that, The rotating part (2033) is a column with an arc-shaped groove on its surface in an annular array, and the inner diameter of the arc-shaped groove is the same as that of the feeding chute (20312).

9. The screw inspection device based on thread rolling as described in claim 4, characterized in that, The rotating part (2033) and the chassis (2032) are coaxially fixedly connected. A transmission shaft is connected between the rotating part (2033) and the chassis (2032). The transmission shaft is connected to the driven shaft (2013) through another set of rotating components (2012).

10. The screw inspection device based on thread rolling as described in claim 1, characterized in that, It also includes a detection component (30) and a collection component (40). The detection component (30) is located above the lower transfer plate (202) to detect the passing screws, and the collection component (40) is located below the lower transfer plate (202) to collect the qualified screws after detection.

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