A surface defect detection device for a screw

Abstract

The present invention discloses a surface defect detection device for a screw rod, and relates to the field of screw rod detection, including a driving frame and a fixed frame, three groups of driving rods are installed between the driving frame and the fixed frame, a detection frame is arranged between the driving frame and the fixed frame, the detection frame is moved by the driving rod, a driving motor is installed on one side of the driving frame, a detection disk is installed inside the detection frame, a cylinder is connected to the top of the detection disk, the output end of the cylinder is located at the inner side of the detection disk and is connected to two groups of universal mechanical arms, and a detection camera is installed at the end of each group of the universal mechanical arms. The present invention can drive two groups of universal mechanical arms to move downward by the cylinder when detecting the screw rod, and adjust the position of the detection camera by the universal mechanical arm, so that the angle of the universal camera is aligned with the screw blade outside the screw rod, so that the screw blades on both sides can be detected, thereby improving the detection effect and detection range.

Description

Technical Field

[0001] The invention relates to the field of screw rod detection, in particular to a surface defect detection device for a screw rod. Background Art

[0002] The screw is usually a cylinder with a spiral groove cut on the outer surface or a cone with a conical spiral groove cut on the conical surface. During the injection molding process, the screw is needed to extrude and deform the raw material. During the production process of the screw, a lathe or other mechanism is usually used to turn and shape the surface of the metal rod so that a suitable spiral groove is formed on the surface of the metal rod to process the screw. However, after the screw is produced, the surface of the screw will be damaged due to the loss of the tool or the collision of the screw during transportation. During the use of the screw, the surface damage will gradually accumulate over time, which will cause fluctuations and vibrations during the transmission of the screw, affecting production. For this reason, when the screw is used, the surface of the screw needs to be inspected frequently to detect defects and reduce additional losses.

[0003] Prior art, such as a camshaft surface detection device disclosed in CN220795066U, detects different positions of the cam through multiple camera mechanisms. However, during the detection process, it is not convenient to detect different angles of the cam. During the detection, multiple cameras are required to detect different positions of the cam, and the detection effect is poor.

[0004] The prior art, such as a pressure pipe surface defect detection device disclosed in CN213658595U, can detect a rotating pipe through a single set of cameras. However, during the detection process, if some impurities adhere to the surface of the pipe, it will interfere with the detection effect.

[0005] Moreover, the existing technology is usually unable to detect the surface of the screw. The screw usually has a thread groove inside. During the inspection process of the existing camera, only the surface of the screw can be inspected, while the side of the thread groove is not inspected, resulting in many places of the screw being unable to be inspected. Summary of the invention

[0006] Based on this, the purpose of the present invention is to provide a surface defect detection device for a screw to solve the technical problems of impurities interfering with the detection during screw detection and the inability to detect different positions inside the screw.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a surface defect detection device for a screw, comprising a driving frame and a fixed frame, three groups of driving rods are installed between the driving frame and the fixed frame, a detection frame is arranged between the driving frame and the fixed frame, the detection frame is moved by the driving rod, a driving motor is installed on one side of the driving frame, the output end of the driving motor is connected to a main gear, a clamping structure is fixed on the outer side of the main gear, the screw is fixed to the main gear through the clamping structure, a driven gear is installed on the outer wall of the driving rod, the driving rod is connected to the main gear through the driven gear, a detection disk is installed inside the detection frame, the top of the detection disk is connected to a cylinder, the output end of the cylinder is located on the inner side of the detection disk and is connected to two groups of universal mechanical arms, a detection camera is installed at the end of each group of the universal mechanical arms, the detection camera detects both sides of the screw blade of the screw, a fixing structure is installed inside the fixed frame, and the fixing structure limits the end of the screw.

[0008] By adopting the above technical solution, the screw can be conveniently limited by a fixed structure, and at the same time, the screw can be driven to rotate and the detection frame can be moved, so that different positions on the outside of the screw can be detected, which improves the detection effect. In addition, two sets of detection cameras can be used to illuminate both sides of the outer screw blades of the screw at different angles, thereby increasing the detection range.

[0009] The present invention is further configured such that a protective shell is installed on the outer side of the driving frame, the protective shell is sleeved on the outer side of the driven gear, and a fixed bearing is installed on the outer side of the driving frame, and the driving rod is rotatably connected to the driving frame through the fixed bearing.

[0010] By adopting the above technical solution, the driven gear can be easily protected.

[0011] The present invention is further configured such that the driving frame and the fixing frame are located at the top end of the detection frame and are connected to a power supply rod, a wire is installed inside the power supply rod, the top end of the detection frame is connected to a power connection ring, the power connection ring is sleeved on the outside of the wire and connected to the input line, an power connection socket is installed on the outer wall of the detection frame, the power connection ring is connected to the power connection socket, and the power connection socket is connected to each group of mechanisms inside the detection frame through wires.

[0012] By adopting the above technical solution, power can be supplied to each group of mechanisms inside the detection frame, so that the detection mechanism can operate normally.

[0013] The present invention is further configured such that the engaging structure on the outer side of the driving frame comprises a mounting plate, the mounting plate is fixedly connected to the main gear, a fixing sleeve is mounted on the outer side of the mounting plate, and a thread is provided inside the fixing sleeve.

[0014] By adopting the above technical solution, the screw rod can be easily fixed and limited.

[0015] The present invention is further configured such that four groups of transmission cylinders are installed on the outer wall of the detection frame, wherein three groups of transmission cylinders have threads on their inner walls and are sleeved on the outer sides of the driving rods, and the driving rods drive the detection frame to move through the transmission cylinders.

[0016] By adopting the above technical solution, it is convenient to drive the detection frame to move through the driving rod to detect different positions of the screw.

[0017] The present invention is further configured such that a fixing plate and a positioning plate are installed on the outer side of the detection disk, a clamping groove and a limiting groove are opened on the inner wall of the detection frame, and the fixing plate and the positioning plate are fixedly connected to the clamping groove and the limiting groove respectively.

[0018] By adopting the above technical solution, the detection plate can be conveniently fixed.

[0019] The present invention is further configured such that a rotating rod is installed between the driving frame and the fixing frame, the rotating rod is located below the detection disk, a sliding groove is opened on the outer side of the rotating rod, and the sliding groove is located inside a group of transmission cylinders.

[0020] The present invention is further configured such that a limit ring is installed on the outer wall of the detection frame, the limit ring is sleeved on the outer side of the rotating rod, and a rotating ring is sleeved on the outer side of the limit ring, a plurality of groups of cleaning sheets are installed on the outer wall of the rotating ring, a pin is inserted on the outer side of the rotating ring, and the pin extends to the inside of the slide groove.

[0021] By adopting the above technical solution, the rotating ring can be driven to rotate conveniently by the rotating rod, and the rotating ring cleans the outside of the screw rod through the cleaning sheet on the outside.

[0022] The present invention is further configured such that a clamping assembly is connected to the side of the fixing frame, a transmission gear ring is installed inside the fixing frame, a plurality of groups of rotating rods are installed on the outside of the transmission gear ring, each group of rotating rods faces the center position of the fixing frame, and a clamping wheel is connected to the end of the rotating rod, the interior of the fixing frame is hollow, and a guide rod is fixed inside the fixing frame in contact with the outside of each group of rotating rods.

[0023] By adopting the above technical solution, the rotating rod can be driven to rotate by the transmission ring gear, and the rotating rod can be guided by the guide rod, so that the rotating rod moves toward the inside of the fixed frame and the clamping wheel is attached to the outside of the screw.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] 1. The present invention provides a driving frame, a detection frame and a fixed frame, so that when detecting the screw, the driving frame and the fixed frame can limit the screw, and then the driving frame drives the screw to rotate, and at the same time drives the detection frame to move, so as to detect different positions of the screw, and control it through a group of motors, thereby improving the detection effect.

[0026] 2. The present invention provides a detection disk, which can drive two sets of universal mechanical arms to move downward through the cylinder when detecting the screw, and adjust the position of the detection camera through the universal mechanical arm, so that the angle of the universal camera is aligned with the screw blade on the outside of the screw, so that both sides of the screw blade can be detected, thereby improving the detection effect and detection range.

[0027] 3. The present invention also has a detection frame and a rotating rod, which can drive the rotating ring to rotate through the rotating rod during detection, and the rotating ring drives the outer cleaning sheet to rotate, and the cleaning sheet impacts and cleans the screw, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the driving frame of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the detection frame of the present invention;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the structure with a partial enlargement at the center;

[0032] Figure 5 It is a structural schematic diagram of the detection disk of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the fixing frame of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure inside the fixing frame of the present invention;

[0035] Figure 8 This is a schematic diagram of the power supply structure of the detection disk of the present invention;

[0036] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0037] In the figure: 1. driving frame; 101. driving motor; 102. main gear; 103. driven gear; 104. protective shell; 2. detection frame; 201. transmission cylinder; 202. rotating ring; 203. cleaning sheet; 204. latch; 205. limit ring; 206. power connection ring; 207. power connection socket; 3. fixing frame; 301. clamping assembly; 3011. clamping motor; 3012. clamping gear; 302. rotating rod; 303. clamping wheel; 304. transmission gear ring; 305. guide rod; 4. driving rod; 5. mounting plate; 501. fixing sleeve; 6. detection plate; 601. fixing plate; 602. positioning plate; 603. cylinder; 604. universal robot arm; 605. detection camera; 7. power supply rod; 8. rotating rod; 801. slide groove. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The following describes an embodiment of the present invention based on its overall structure.

[0040] A surface defect detection device for a screw, such as Figures 1 to 9As shown, it includes a driving frame 1 and a fixing frame 3, three groups of driving rods 4 are installed between the driving frame 1 and the fixing frame 3, a detection frame 2 is arranged between the driving frame 1 and the fixing frame 3, and four groups of transmission cylinders 201 are installed on the outer wall of the detection frame 2, wherein the inner walls of three groups of transmission cylinders 201 are provided with threads and are sleeved on the outer side of the driving rod 4, and the driving rod 4 drives the detection frame 2 to move through the transmission cylinder 201, a driving motor 101 is installed on one side of the driving frame 1, and the output end of the driving motor 101 is connected to the main gear 102, and the outer side of the main gear 102 is fixed with a clamping structure, and the clamping structure on the outer side of the driving frame 1 includes a mounting plate 5, and the mounting plate 5 is fixedly connected to the main gear 102, and a fixing sleeve 501 is installed on the outer side of the mounting plate 5, and a thread is provided inside the fixing sleeve 501, and the screw is fixed to the main gear 102 through the clamping structure, and a driven gear 103 is installed on the outer wall of the driving rod 4, and the driving rod 4 The driven gear 103 is connected to the main gear 102 in transmission, and the main gear 102 can drive the screw to rotate while the driven gear 103 can drive the detection frame 2 to move through meshing. A protective shell 104 is installed on the outer side of the driving frame 1, and the protective shell 104 is sleeved on the outer side of the driven gear 103 to protect the driven gear 103. A fixed bearing is installed on the outer side of the driving frame 1, and the driving rod 4 is rotatably connected to the driving frame 1 through the fixed bearing. A detection disk 6 is installed inside the detection frame 2, and a cylinder 603 is connected to the top of the detection disk 6. The output end of the cylinder 603 is located on the inner side of the detection disk 6 and is connected to two groups of universal mechanical arms 604. A detection camera 605 is installed at the end of each group of universal mechanical arms 604. The detection camera 605 detects both sides of the screw blade of the screw. A fixed structure is installed inside the fixed frame 3, and the fixed structure limits the end of the screw.

[0041] See also Figure 1 , Figure 8 and Fig. 9 The driving frame 1 and the fixing frame 3 are located at the top of the detection frame 2 and are connected to a power supply rod 7, a wire is installed inside the power supply rod 7, and a power connection ring 206 is connected to the top of the detection frame 2. The power connection ring 206 is sleeved on the outside of the wire and connected to the input line. The outer wall of the detection frame 2 is installed with a power connection socket 207, and the power connection ring 206 is connected to the power connection socket 207. The power connection socket 207 is connected to each group of mechanisms inside the detection frame 2 through a wire, which can supply power to the detection disk 6 so that the detection disk 6 can be used normally.

[0042] See also Figure 3 A fixing plate 601 and a positioning plate 602 are installed on the outer side of the detection disk 6, and a snap-fit ​​groove and a limit groove are opened on the inner wall of the detection frame 2. The fixing plate 601 and the positioning plate 602 are fixedly connected to the snap-fit ​​groove and the limit groove respectively, which can facilitate the fixing and locking of the detection disk 6 and ensure that the angle of the detection disk 6 is normal.

[0043] See also Figure 3and Figure 4 A rotating rod 8 is installed between the driving frame 1 and the fixed frame 3, and the rotating rod 8 is located below the detection disk 6. A slide groove 801 is opened on the outer side of the rotating rod 8, and the slide groove 801 is located inside a group of transmission cylinders 201. A limit ring 205 is installed on the outer wall of the detection frame 2, and the limit ring 205 is sleeved on the outer side of the rotating rod 8. Moreover, a rotating ring 202 is sleeved on the outer side of the limit ring 205, and multiple groups of cleaning sheets 203 are installed on the outer wall of the rotating ring 202. A latch 204 is inserted on the outer side of the rotating ring 202, and the latch 204 extends to the inside of the slide groove 801, so that the outer side of the screw can be easily cleaned, and the transmission between the rotating ring 202 and the rotating rod 8 can be easily released through the latch 204.

[0044] See also Figure 6 and Figure 7 A clamping assembly 301 is connected to the side of the fixed frame 3, and the clamping assembly 301 includes a clamping motor 3011 and a clamping gear 3012. The clamping motor 3011 and the clamping gear 3012 are installed with a transmission ring gear 304 inside the fixed frame 3, and the clamping gear 3012 is transmission-connected to the transmission ring gear 304. A plurality of groups of rotating rods 302 are installed on the outer side of the transmission ring gear 304, and each group of rotating rods 302 faces the center position of the fixed frame 3, and the ends of the rotating rods 302 are connected with clamping wheels 303. The interior of the fixed frame 3 is hollow, and a guide rod 305 is fixed inside the fixed frame 3 on the outer side of each group of rotating rods 302, which can facilitate the fixing and limiting of the screw rod to avoid the deviation and bending of the screw rod during detection.

[0045] Before inspecting the screw, first select a suitable mounting plate 5 and a fixed sleeve 501 according to the size of the screw, and install the fixed sleeve 501 to the outside of the main gear 102 through the mounting plate 5, so that the centers of the fixed sleeve 501, the inspection plate 6 and the fixed frame 3 are located on the same horizontal line, and the cylinder 603 is started to drive the universal mechanical arm 604 to move upward, and then the screw to be inspected is inserted into the fixed frame 3, and the clamping motor 3011 is started at this time, and the clamping motor 3011 drives the clamping gear 3012 to rotate, and the clamping gear 3012 drives the transmission ring gear 304 to rotate, and the transmission ring gear 304 drives multiple groups of rotating rods 302 to rotate, and the rotating rods 302 are fitted on the outside of the guide rod 305 to rotate and move toward the inside of the fixed frame 3 until the outside of the screw is preliminarily limited, thereby partially supporting the screw, and then the screw is pushed. The rod continues to move until the end of the screw is aligned with the outside of the fixed sleeve 501, and then the drive motor 101 is started, and the drive motor 101 drives the main gear 102 to rotate, and the main gear 102 drives the fixed sleeve 501 to rotate, and at this time the screw is pushed so that the end of the screw is inserted into the thread in the fixed sleeve 501 to limit the position of the screw (if the end of the screw is not threaded, a clamp of a rotating rod and a clamping plate is used instead, which is fixed to the outside of the main gear 102 through the mounting plate 5, and the screw is limited). When the main gear 102 rotates, it will drive the outer driven gear 103 to rotate, and the driven gear 103 drives the drive rod 4, and the drive rod 4 drives the detection frame 2 away from the drive frame 1, and the clamping assembly 301 is started to push each group of clamping wheels 303 to be close to the end of the screw (generally, the end of the screw will not have a thread structure);

[0046] When the screw is fixed, the drive motor 101 is operated in the reverse direction to drive the detection frame 2 to move to the outside of the drive frame 1, and then the cylinder 603 is started to push the universal mechanical arm 604 to move downward, so that the detection camera 605 is close to the screw, and then the universal mechanical arm 604 is started to drive each group of detection cameras 605 to align with both sides of the threaded sheet on the outside of the screw to detect the side of the screw sheet, and then the drive motor 101 is started in the forward direction (at this time, the rotation direction is consistent with the fixing direction of the screw, which can prevent the screw from separating from the fixed sleeve 501), the drive motor 101 drives the main gear 102 to rotate, the main gear 102 drives the mounting plate 5 to rotate, and the mounting plate 5 drives the screw to rotate through the fixed sleeve 501. At the same time, the main gear 102 will drive the driving rod 4 to rotate, drive the detection frame 2 to move toward the fixed frame 3, and drive each group of detection cameras 605 to move outside the screw, so as to detect the screw piece. At the same time, the angle of the detection camera 605 is appropriately adjusted by the universal mechanical arm 604, so that the detection camera 605 is conveniently aligned with the screw pieces of different spacings, thereby improving the detection effect. At the same time, the rotating rod 8 will drive the rotating ring 202 to rotate, and the rotating ring 202 drives the cleaning sheet 203 on the outside to rotate. The cleaning sheet 203 cleans the surface of the screw (including the side of the screw piece), thereby improving the camera detection effect. At the same time, the cleaning sheet 203 does not detect the camera 605, thereby reducing interference with the detection camera.

[0047] When the screw inspection is completed, the screw needs to be disassembled and the inspection frame 2 needs to be returned to the appropriate position. At this time, the drive motor 101 is rotated in the opposite direction, and the end of the screw is fixed and limited and pulled out. At this time, the screw is separated from the fixed sleeve 501. At the same time, the main gear 102 drives the driven gear 103 to rotate, driving the inspection frame 2 to move to the middle part of the device, and then the screw can be replaced.

[0048] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A surface defect detection device for a screw, comprising a driving frame (1) and a fixing frame (3), wherein three sets of driving rods (4) are installed between the driving frame (1) and the fixing frame (3), and characterized in that: A detection frame (2) is arranged between the driving frame (1) and the fixing frame (3); the detection frame (2) is moved by a driving rod (4); a driving motor (101) is installed on one side of the driving frame (1); an output end of the driving motor (101) is connected to a main gear (102); a clamping structure is fixed on the outer side of the main gear (102); a screw is fixed to the main gear (102) by the clamping structure; a driven gear (103) is installed on the outer wall of the driving rod (4); the driving rod (4) is connected to the main gear by the driven gear (103). (102) transmission connection, a detection disk (6) is installed inside the detection frame (2), the top of the detection disk (6) is connected to a cylinder (603), the output end of the cylinder (603) is located on the inner side of the detection disk (6) and is connected to two groups of universal mechanical arms (604), and a detection camera (605) is installed at the end of each group of universal mechanical arms (604), and the detection camera (605) detects both sides of the screw blade of the screw rod, and a fixed structure is installed inside the fixed frame (3), and the fixed structure limits the end of the screw rod; A fixing plate (601) and a positioning plate (602) are installed on the outer side of the detection plate (6); a snap-fit ​​groove and a limit groove are provided on the inner wall of the detection frame (2); the fixing plate (601) and the positioning plate (602) are fixedly connected to the snap-fit ​​groove and the limit groove respectively; A rotating rod (8) is installed between the driving frame (1) and the fixed frame (3), the rotating rod (8) is located below the detection plate (6), a sliding groove (801) is opened on the outer side of the rotating rod (8), and the sliding groove (801) is located inside a group of transmission cylinders (201); A limit ring (205) is installed on the outer wall of the detection frame (2), and the limit ring (205) is sleeved on the outer side of the rotating rod (8). A rotating ring (202) is sleeved on the outer side of the limit ring (205), and a plurality of cleaning sheets (203) are installed on the outer wall of the rotating ring (202). A latch (204) is inserted on the outer side of the rotating ring (202), and the latch (204) extends to the inside of the slide groove (801).

2. The surface defect detection device for a screw according to claim 1, characterized in that: A protective shell (104) is installed on the outside of the driving frame (1), and the protective shell (104) is sleeved on the outside of the driven gear (103). A fixed bearing is installed on the outside of the driving frame (1), and the driving rod (4) is rotatably connected to the driving frame (1) via the fixed bearing.

3. The surface defect detection device for a screw rod according to claim 1, characterized in that: The driving frame (1) and the fixing frame (3) are located at the top of the detection frame (2) and are connected to a power supply rod (7), a wire is installed inside the power supply rod (7), the top of the detection frame (2) is connected to a power connection ring (206), the power connection ring (206) is sleeved on the outside of the wire and connected to the input line, the outer wall of the detection frame (2) is installed with a power connection socket (207), the power connection ring (206) is connected to the power connection socket (207), and the power connection socket (207) is connected to each group of mechanisms inside the detection frame (2) through the wire.

4. The surface defect detection device for a screw rod according to claim 1, characterized in that: The engaging structure on the outside of the driving frame (1) comprises a mounting plate (5), the mounting plate (5) is fixedly connected to the main gear (102), a fixing sleeve (501) is installed on the outside of the mounting plate (5), and a thread is provided inside the fixing sleeve (501).

5. The surface defect detection device for a screw rod according to claim 1, characterized in that: Four groups of transmission cylinders (201) are installed on the outer wall of the detection frame (2), wherein three groups of transmission cylinders (201) have threads on their inner walls and are sleeved on the outer sides of the driving rods (4), and the driving rods (4) drive the detection frame (2) to move via the transmission cylinders (201).

6. The surface defect detection device for a screw rod according to claim 1, characterized in that: The side of the fixed frame (3) is connected to a clamping assembly (301), a transmission gear ring (304) is installed inside the fixed frame (3), a plurality of transmission rods (302) are installed outside the transmission gear ring (304), each transmission rod (302) faces the center position of the fixed frame (3), and the end of the transmission rod (302) is connected to a clamping wheel (303), the interior of the fixed frame (3) is hollow, and a guide rod (305) is fixed inside the fixed frame (3) and is fitted on the outside of each transmission rod (302).

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