Nondestructive testing device for screw

Abstract

This invention provides a screw non-destructive testing device, relating to the field of screw non-destructive testing technology. The screw non-destructive testing device includes a base plate, a main body structure fixedly mounted on the upper surface of the base plate, a protective mechanism fixedly mounted above the main body structure, a recycling mechanism slidably mounted at the bottom of the main body structure, recycling conveyor belts fixedly mounted on both sides of the main body structure, a vibrating feeding screen mounted on one side of the main body structure, and an electrical control box mounted on the other side of the vibrating feeding screen. The main body structure includes a plate conveyor, and multiple positioning grooves are formed on the surface of the plate chain of the plate conveyor. By combining the vibrating feeding screen and the plate conveyor with eddy current, ultrasonic, and visual multi-dimensional non-destructive testing technologies, the entire process of screws from automatic feeding to continuous inspection, intelligent defect identification, and classified recycling is automated, effectively solving the problems of existing equipment's difficulty in continuous inspection and the ease with which internal defects are missed during manual inspection.

Description

Technical Field

[0001] This invention relates to the field of non-destructive testing technology for screws, specifically to a non-destructive testing device for screws. Background Technology

[0002] The screw manufacturing process begins with wire rod. After drawing / precision drawing to obtain the precise diameter, the head is formed by heading, and the threads are rolled to complete the basic shape. Subsequently, heat treatment is performed to improve mechanical strength, followed by surface treatment (such as electroplating) to enhance corrosion resistance. Finally, a sorting process removes defective products, and the screws are packaged and shipped. After the screw processing is completed, non-destructive testing is performed. Internal defects such as cracks, porosity, and inclusions may exist; cracked or damaged screws are difficult to detect with the naked eye.

[0003] Existing patent (CN117434147A) discloses "a non-destructive testing device for industrial parts, including a testing table and a support rod fixedly connected to one side of the top of the testing table. The top of the testing table is provided with a support clamping structure for fixing the position of the part. The support clamping structure includes a support platform, and a clamping element is provided at the top of the support platform. One side of the testing table is provided with a rotating structure for driving the part to rotate. The rotating structure includes a worm gear. The outer wall of the support rod is provided with a sliding structure. One side of the sliding structure is provided with a probe for testing the part. This invention fixes the tubular part on the testing table by setting a corresponding support clamping structure at the top of the testing table, and uses a probe set on the support rod to perform flaw detection. At the same time, the rotating structure is used to rotate the tubular part, realizing stable control of rotation detection, avoiding insufficient detection time or missed detection positions during flaw detection, and ensuring the accuracy of detection."

[0004] In the process of realizing this application, the inventors discovered the following problems with the prior art: most existing non-destructive testing equipment uses probes to perform non-destructive testing on the finished parts. In actual use, since the screw cross-section is circular, during the continuous testing process, after being placed on the conveyor, the screw position will shift as it moves. Moreover, since the screw is small in size, during the continuous testing process, the screw will shift, making it difficult to align the probe, which will affect the test results and accuracy. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a non-destructive testing device for screws, which solves the problem that existing testing equipment is unable to perform continuous testing on screws.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a screw non-destructive testing device, including a base plate, a main body mechanism fixedly arranged on the upper surface of the base plate, a protective mechanism fixedly arranged above the main body mechanism, a recycling mechanism slidably arranged at the bottom of the main body mechanism, recycling conveyor belts fixedly arranged on both sides of the main body mechanism, a vibrating feeding screen arranged on one side of the main body mechanism, and an electrical control box arranged on one side of the vibrating feeding screen. The main structure includes a plate conveyor, and the plate chain of the plate conveyor is provided with multiple positioning grooves, and each of the multiple positioning grooves is fitted with a detection seat.

[0007] Preferably, the detection seat includes a detection box, an upper cover plate is fixedly disposed on the top of the detection box, a turntable is rotatably disposed on the surface of the upper cover plate, a pressure trigger switch is fixedly disposed at the center of the upper surface of the turntable, and a placement rack is fixedly disposed on one side of the upper surface of the turntable.

[0008] Preferably, a servo motor is fixedly installed on the bottom surface of the detection box, the output end of the servo motor is connected to the turntable, an electronic tag is fixedly installed on one side surface of the detection box, and a battery box is fixedly installed on the other side surface of the detection box.

[0009] Preferably, a feeding frame is fixedly installed on one side of the upper surface of the plate conveyor, a feeding slide rail is fixedly installed on the bottom surface of the feeding frame, a feeding electric push rod is controllably slidably installed on the bottom surface of the feeding slide rail, and a feeding plate is fixedly installed at the bottom end of the feeding electric push rod.

[0010] Preferably, a first detection frame, a second detection frame, and a third detection frame are fixedly arranged in the middle of the upper surface of the plate conveyor. The bottom surface of the first detection frame is provided with multiple eddy current detection coils, the bottom surface of the second detection frame is provided with multiple ultrasonic detection probes, and the bottom surface of the third detection frame is provided with multiple detection cameras.

[0011] Preferably, two sorting racks are fixedly installed on one side of the upper surface of the plate conveyor. Sorting slide rails are controllably slidably installed on the bottom surface of each of the two sorting racks. Sorting electric push rods are controllably slidably installed on the bottom surface of each of the two sorting slide rails. Rotating heads are fixedly installed at the bottom ends of each of the two sorting electric push rods. A sorting plate is connected to one side of each of the two rotating heads.

[0012] Preferably, the protective mechanism includes a protective cover, with glass windows fixedly provided on both sides of the protective cover, and a sorting port opened between the two glass windows.

[0013] Preferably, the recycling mechanism includes a recycling box, an inclined panel is fixedly installed inside the recycling box, and a recycling baffle is hinged to one side of the recycling box.

[0014] Working Principle: When in use, the screw to be inspected is first placed in a vibrating feeding screen and conveyed to one side of the main mechanism via vibration. The feeding slide rail at the bottom of the feeding frame, in conjunction with the feeding electric push rod, drives the feeding plate to descend and fork the screw, lifting it to the inspection seat on the surface of the plate conveyor. The inspection seat is magnetically secured to the positioning groove of the conveyor chain via bottom magnetic blocks and locking blocks. After the screw is inserted into the placement frame, a pressure trigger switch is activated to start the inspection seat. A servo motor drives the turntable, causing the screw to rotate radially. The inspection seat then sequentially passes through the eddy current detection coil of the first inspection frame, the ultrasonic detection probe of the second inspection frame, and the detection camera of the third inspection frame, performing eddy current flaw detection and crack detection respectively. Detection and label recognition: The electrical control box integrates the control and detection system, analyzes the data returned by each detection component, and controls the electronic tags to display the corresponding status: green for no damage, yellow for suspected damage, and red for damage. Subsequently, the sorting rack drives the rotating head and sorting plate through the sorting slide rail and sorting electric push rod. According to the label color, the problematic screws are picked up and rotated 15 degrees before being moved to the recycling conveyor belt for recycling. The unsorted undamaged screws move to the end with the conveyor and fall naturally into the recycling box of the recycling mechanism under the action of gravity. They slide and accumulate along the inclined panel and are collected uniformly after the recycling baffle is opened. The entire device is sealed and protected by the protective cover and glass window of the protective mechanism. The sorting port allows the sorting components to extend and retract.

[0015] This invention provides a non-destructive testing device for screws. It has the following beneficial effects: 1. This invention provides a screw non-destructive testing device. It achieves continuous screw conveying through a plate conveyor with positioning grooves and a testing seat, and automatic feeding via a vibrating feeding screen. Eddy current detection coils, ultrasonic detection probes, and a detection camera are used to perform multi-dimensional non-destructive testing on the screws. A sorting mechanism automatically sorts qualified and defective screws based on the test results. A protective mechanism ensures a safe testing environment. This achieves full automation of the screw process, from automatic feeding, continuous testing, accurate identification to sorting and recycling. It effectively solves the problems of existing equipment's difficulty in continuous screw testing and the tendency for manual inspection to miss internal defects, significantly improving testing efficiency and accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the main structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the main structure of the present invention. Figure 2 ; Figure 5This is a schematic diagram of the structure of the detection seat of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the detection seat of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the protective mechanism of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the protective mechanism of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the recycling mechanism of the present invention; Figure 10 This is a schematic diagram of the structure of the recycling conveyor belt of the present invention; Figure 11 This is a schematic diagram of the structure of the vibrating feeding screen of the present invention.

[0017] The components include: 1. Main structure; 2. Protective structure; 3. Recycling mechanism; 4. Recycling conveyor belt; 5. Electrical control box; 6. Vibrating feeding screen; 7. Base plate; 101. Feeding slide rail; 102. Feeding electric push rod; 103. Feeding plate; 104. Feeding frame; 105. First detection frame; 106. Eddy current detection coil; 107. Second detection frame; 108. Ultrasonic detection probe; 109. Third detection frame; 110. Detection camera; 111. Sorting frame; 112. Sorting slide rail; 113. Sorting electric push rod. 114. Rotating head; 115. Sorting plate; 116. Detection seat; 117. Positioning slot; 118. Plate conveyor; 11601. Placement rack; 11602. Turntable; 11603. Top cover plate; 11604. Servo motor; 11605. Battery box; 11606. Detection box; 11607. Electronic tag; 11608. Pressure trigger switch; 201. Glass window; 202. Protective cover; 203. Sorting port; 301. Recycling baffle; 302. Sloping panel; 303. Recycling box. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1-2 and Figure 10-11As shown, this embodiment of the invention provides a screw non-destructive testing device, including a base plate 7, a main body mechanism 1 fixedly disposed on the upper surface of the base plate 7, a protective mechanism 2 fixedly disposed above the main body mechanism 1, a recycling mechanism 3 slidably disposed at the bottom of the main body mechanism 1, recycling conveyor belts 4 fixedly disposed on both sides of the main body mechanism 1, a vibrating feeding screen 6 disposed on one side of the main body mechanism 1, and an electrical control box 5 disposed on one side of the vibrating feeding screen 6.

[0020] Specifically, during use, the screws to be tested are placed in the vibrating feeding screen 6, which gradually transports them to one side of the main body mechanism 1. The main body mechanism 1 moves the screws from the vibrating feeding screen 6 to its surface, where they are sequentially tested by various testing components. The testing seat 116 where the screws with problems are detected is marked. The problematic screws are sorted and transported to the surfaces of the two recycling conveyor belts 4 for recycling. When using the two recycling conveyor belts 4, recycling baskets or recycling boxes need to be placed underneath for unified recycling. The screws without problems will fall into the recycling mechanism 3 to await subsequent unified recycling. The integrated circuit control and detection analysis system in the electrical control box 5 can judge the data returned by each testing mechanism and send signals to the corresponding testing seat 116 for marking. The relevant technology is existing mature technology, and its specific principle will not be described in detail in this application.

[0021] like Figure 3-4 As shown, the main structure 1 includes a plate conveyor 118. The plate conveyor 118 has multiple positioning grooves 117 on its plate chain surface. Each positioning groove 117 has a detection seat 116 snapped into it. A feeding rack 104 is fixedly installed on one side of the upper surface of the plate conveyor 118. A feeding slide rail 101 is fixedly installed on the bottom surface of the feeding rack 104. A feeding electric push rod 102 is controllably slidably installed on the bottom surface of the feeding slide rail 101. A feeding plate 103 is fixedly installed at the bottom end of the feeding electric push rod 102.

[0022] Specifically, when the device is in use, the detection seat 116 is magnetically engaged with the positioning groove 117 via the magnetic block and the locking block at its bottom. The feeding electric push rod 102 is slidably connected to the feeding slide rail 101 via a linear motor. During feeding, the feeding electric push rod 102 drives the feeding plate 103 to descend. The linear motor drives the feeding electric push rod 102 to move along the feeding slide rail 101 toward the vibrating feeding screen 6. The screw is forked up by the locking teeth on the surface of the feeding plate 103. Then the feeding electric push rod 102 retracts, lifting the screw. The linear motor drives the feeding electric push rod 102 to return to above the detection seat 116. The feeding electric push rod 102 then extends again, inserting the screw into the detection seat 116. This process is repeated to achieve continuous feeding of screws.

[0023] like Figure 5-6As shown, the detection base 116 includes a detection box 11606, an upper cover plate 11603 fixedly mounted on the top of the detection box 11606, a turntable 11602 rotatably mounted on the surface of the upper cover plate 11603, a pressure trigger switch 11608 fixedly mounted at the center of the upper surface of the turntable 11602, a placement rack 11601 fixedly mounted on one side of the upper surface of the turntable 11602, a servo motor 11604 fixedly mounted on the bottom surface inside the detection box 11606, the output end of the servo motor 11604 connected to the turntable 11602, an electronic tag 11607 fixedly mounted on one side of the detection box 11606, and a battery box 11605 fixedly mounted on the other side of the detection box 11606.

[0024] Specifically, after loading, the screws are inserted into the placement rack 11601 via the loading plate 103. After the screws are inserted, the pressure trigger switch 11608 is triggered, and the entire detection seat 116 starts working. During the detection process, the detection seat 116 moves continuously via the plate conveyor 118. During the movement, the servo motor 11604 drives the turntable 11602 to rotate, which in turn drives the screw to rotate radially, so as to achieve all-round detection. During the detection process, if damage is found in the screws, the electrical control box 5 can transmit the information to the electronic tag 11607, making it display red. If the screws are suspected of being damaged, the electronic tag will display yellow; if there is no damage, it will display green. The battery box 11605 contains a battery that can power the detection box 116. The pressure trigger switch 11608 is connected to the electrical structure circuit and can control the working status of the detection box 116. The electronic tag 11607 is a Hanshow Nebular-154, 1.54 inches in size, with color display and data transmission and reception functions, which can meet the usage requirements of this device.

[0025] like Figure 3-4 As shown, a first detection frame 105, a second detection frame 107 and a third detection frame 109 are fixedly installed in the middle of the upper surface of the plate conveyor 118. Multiple eddy current detection coils 106 are installed on the bottom surface of the first detection frame 105, multiple ultrasonic detection probes 108 are installed on the bottom surface of the second detection frame 107, and multiple detection cameras 110 are installed on the bottom surface of the third detection frame 109.

[0026] Specifically, during use, the detection box 116 is sequentially inspected by the first detection frame 105, the second detection frame 107, and the third detection frame 109. The eddy current detection coil 106 can perform eddy current detection on the screw. As the screw rotates and passes through the detection coil, the coil generates an alternating magnetic field, inducing eddy currents inside the screw. If there is a defect in the screw, it will cause distortion of the eddy current field. The signal changes will then be collected and analyzed. The ultrasonic detection probe 108 uses a 10-50MHz high-frequency focusing probe to detect transverse and longitudinal cracks on the surface of the screw. The detection data will be transmitted to the electrical control box 5 for analysis and processing to determine whether there is a defect in the screw. The detection camera 110 is used to identify the color of the electronic tag 11607. For yellow and red electronic tags 11607, the electrical control box 5 controls two different sorting plates 115 to sort them separately.

[0027] Two sorting racks 111 are fixedly installed on one side of the upper surface of the plate conveyor 118. Sorting slide rails 112 are controllably slidably installed on the bottom surface of both sorting racks 111. Sorting electric push rods 113 are controllably slidably installed on the bottom surface of both sorting slide rails 112. Rotating heads 114 are fixedly installed at the bottom end of both sorting electric push rods 113. Sorting plates 115 are connected to one side of both rotating heads 114.

[0028] Specifically, during sorting, the two sorting racks 1 sort the screws on the red and yellow label detection seats 116 respectively. The sorting slide rail 112 is slidably connected to the sorting rack 111 via a linear motor, controlling the sorting electric push rod 113 to move above the corresponding detection seat 116. Simultaneously, as the sorting electric push rod 113 extends, the sorting slide rail 112 drives the sorting electric push rod 113 to move towards the screw via the linear motor. The rotating head 114 contains a motor with an encoder, and the sorting plate 115... The surface of the plate has grooves to hold the screw. The rotating head drives the sorting plate 115 to rotate upward by 15 degrees, and then the screw is lifted by the sorting electric push rod 113. The upward rotation angle can prevent the screw from falling during the movement. After the screw is lifted, the sorting plate 115 moves along the sorting rack 1 from the sorting port 203 to the recycling conveyor belt 4 outside the protective cover 202. The rotating head 114 drives the sorting plate 115 to rotate 90 degrees and put the screw down. Damaged screws are subsequently recycled and processed in a unified manner, and screws suspected of being damaged can be re-inspected.

[0029] like Figure 7-8 As shown, the protective mechanism 2 includes a protective cover 202, with glass windows 201 fixedly installed on both sides of the protective cover 202, and a sorting port 203 opened in the middle of the two glass windows 201.

[0030] Specifically, by setting up a protective cover 202, the falling of external dust can be reduced, avoiding any impact on the overall operation of the device. The glass window 201 is a sliding glass window, through which users can observe the inside of the device. The reserved sorting port 203 allows two sorting electric push rods 113 to extend and retract, thereby placing the sorted defective screws onto the recycling conveyor belt 4 for recycling.

[0031] like Figure 9 As shown, the recycling mechanism 3 includes a recycling box 303, an inclined panel 302 is fixedly installed inside the recycling box 303, and a recycling baffle 301 is hinged to one side of the recycling box 303.

[0032] Specifically, during use, screws that have undergone flaw detection but have not been sorted will continue to move along the plate conveyor 118. When the screws reach the lower surface of the plate conveyor 118, they will fall from the detection seat 116 under the action of gravity. The fallen screws will enter the recycling box 303. The screws entering the recycling box 303 will slide along the inclined panel 302 toward the recycling baffle 301. The recycling baffle 301 and the recycling box 303 are hinged and equipped with a door lock. After a certain number of screws have accumulated, the recycling baffle 301 can be opened, and the screws can fall out of the recycling box 303 along the inclined panel 302. The user can collect them at one end of the recycling box 303, thus completing the recycling of screws that are undamaged after flaw detection.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw non-destructive testing device, comprising a base plate (7), characterized in that: The main body (1) is fixedly installed on the upper surface of the base plate (7), the protective mechanism (2) is fixedly installed above the main body (1), the recycling mechanism (3) is slidably installed at the bottom of the main body (1), the recycling conveyor belt (4) is fixedly installed on both sides of the main body (1), the vibrating feeding screen (6) is installed on one side of the main body (1), and the electrical control box (5) is installed on one side of the vibrating feeding screen (6). The main structure (1) includes a plate conveyor (118), and the plate conveyor (118) has multiple positioning grooves (117) on its plate chain surface, and each of the multiple positioning grooves (117) has a detection seat (116) engaged inside.

2. The screw non-destructive testing device according to claim 1, characterized in that: The detection seat (116) includes a detection box (11606), an upper cover plate (11603) is fixedly installed on the top of the detection box (11606), a turntable (11602) is rotatably installed on the surface of the upper cover plate (11603), a pressure trigger switch (11608) is fixedly installed at the center of the upper surface of the turntable (11602), and a placement rack (11601) is fixedly installed on one side of the upper surface of the turntable (11602).

3. The screw non-destructive testing device according to claim 2, characterized in that: A servo motor (11604) is fixedly installed on the bottom surface of the detection box (11606). The output end of the servo motor (11604) is connected to the turntable (11602). An electronic tag (11607) is fixedly installed on one side surface of the detection box (11606), and a battery box (11605) is fixedly installed on the other side surface of the detection box (11606).

4. The screw non-destructive testing device according to claim 1, characterized in that: A feeding rack (104) is fixedly installed on one side of the upper surface of the plate conveyor (118). A feeding slide rail (101) is fixedly installed on the bottom surface of the feeding rack (104). A feeding electric push rod (102) is controllably slidably installed on the bottom surface of the feeding slide rail (101). A feeding plate (103) is fixedly installed at the bottom end of the feeding electric push rod (102).

5. The screw non-destructive testing device according to claim 1, characterized in that: The plate conveyor (118) is fixedly provided with a first detection frame (105), a second detection frame (107) and a third detection frame (109) in the middle of its upper surface. The bottom surface of the first detection frame (105) is provided with a plurality of eddy current detection coils (106), the bottom surface of the second detection frame (107) is provided with a plurality of ultrasonic detection probes (108), and the bottom surface of the third detection frame (109) is provided with a plurality of detection cameras (110).

6. The screw non-destructive testing device according to claim 1, characterized in that: Two sorting racks (111) are fixedly installed on one side of the upper surface of the plate conveyor (118). Sorting slide rails (112) are controllably slidably installed on the bottom surface of the two sorting racks (111). Sorting electric push rods (113) are controllably slidably installed on the bottom surface of the two sorting slide rails (112). Rotating heads (114) are fixedly installed at the bottom ends of the two sorting electric push rods (113). A sorting plate (115) is connected to one side of the two rotating heads (114).

7. The screw non-destructive testing device according to claim 1, characterized in that: The protective mechanism (2) includes a protective cover (202), and glass windows (201) are fixedly provided on both sides of the protective cover (202). A sorting port (203) is opened between the two glass windows (201).

8. The screw non-destructive testing device according to claim 1, characterized in that: The recycling mechanism (3) includes a recycling box (303), an inclined panel (302) is fixedly installed inside the recycling box (303), and a recycling baffle (301) is hinged to one side of the recycling box (303).

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