Screw production detection device and method

Abstract

The present invention discloses a screw production detection device and method, which belongs to the technical field of metal parts detection. The device comprises a machine platform, an ultrasonic detection component is provided on one side of the machine platform, a truss is provided on one side of the ultrasonic detection component, a conveying component, an auxiliary component and a control system for controlling the amount of coupling liquid added to the screw surface by the auxiliary component; the auxiliary component is arranged on the machine platform and is used to add coupling liquid to the screw surface; the control system comprises an image acquisition unit, a depression recognition unit, a depression analysis unit and a control unit; the present invention can automatically apply coupling liquid to the screw surface through the auxiliary component, and then quickly identify the depression on the screw surface through the three-dimensional curved surface of the screw, and adjust the amount of coupling liquid according to the volume of the depression, so that the amount of coupling liquid applied to the screw surface can completely fill the depression area, reduce the risk of residual air cavity on the contact surface between the ultrasonic probe and the screw, and thus improve the accuracy of screw production detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal parts detection, and in particular relates to a screw production detection device and method. Background Art

[0002] Screws are common mechanical fasteners, typically made of metal (such as steel or stainless steel), cylindrical in shape, and threaded. They are primarily used to connect two or more objects. They are fastened by rotating the screw, engaging the threads with a corresponding nut or screw hole. A screw generally consists of a head, threads, and a shank.

[0003] Screw production testing is a core step in ensuring product quality, safety, and reliability, especially in areas involving load-bearing structures (such as automobiles, aviation, and construction) or precision equipment (such as medical devices and electronics). Current screw production testing includes manual inspection, strength and hardness testing, dimensional inspection, and internal defect detection.

[0004] Common methods for detecting internal defects in screws include X-ray testing and ultrasonic testing. During ultrasonic testing, coupling fluid is applied to the screw surface to eliminate the air gap between the probe and the screw interface, ensuring effective transmission of ultrasonic waves. However, the screw surface often has depressions (such as machining damage or design features), and a fixed amount of coupling fluid is difficult to completely fill the depressions. This results in residual air cavities at the interface between the ultrasonic probe and the screw, thereby reducing detection accuracy. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a screw production detection device and method to solve the above problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a screw production detection device, comprising a machine platform, an ultrasonic detection assembly provided on one side of the machine platform, a truss provided on one side of the ultrasonic detection assembly, the truss being connected to the ultrasonic detection assembly; the detection device further comprising:

[0007] A conveying assembly, the conveying assembly being arranged on the machine platform and being used for conveying the screws to one side of the ultrasonic detection assembly;

[0008] An auxiliary component, the auxiliary component is arranged on the machine platform and is used to add coupling fluid to the surface of the screw;

[0009] A control system for controlling the amount of coupling fluid added by the auxiliary component to the surface of the screw;

[0010] The control system specifically includes:

[0011] An image acquisition unit, used for acquiring a three-dimensional surface of the screw surface;

[0012] A depression recognition unit is used to determine whether there is a depression on the screw surface based on the three-dimensional curved surface of the screw surface;

[0013] A depression analysis unit, if there is a depression on the screw surface, is used to obtain the volume value of the depression and the edge contour area of ​​the screw surface to generate a set amount of coupling fluid;

[0014] The control unit is used to control the amount of coupling liquid added to the screw surface by the auxiliary component according to the set amount of coupling liquid.

[0015] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0016] Further technical solution: The ultrasonic detection component specifically includes:

[0017] A probe, the probe being arranged on one side of the machine;

[0018] An ultrasonic detector, the ultrasonic detector being arranged on one side of the conveying assembly;

[0019] A connecting cable is provided between the probe and the ultrasonic detector, one end of the connecting cable is connected to the ultrasonic detector and the other end is connected to the probe.

[0020] Further technical solution: The truss specifically includes:

[0021] A support member, the support member being arranged on one side of the machine platform;

[0022] A crossbar, the crossbar being slidably disposed in a sliding groove defined by the support member;

[0023] A threaded rod is arranged in a sliding groove provided in the support member, two ends of the threaded rod are rotatably connected to the support member, and the threaded rod is threadedly connected to the cross bar.

[0024] Further technical solution: The auxiliary components specifically include:

[0025] A coupling liquid storage housing is provided on one side of the machine platform and is used to store the coupling liquid required for ultrasonic testing;

[0026] an smear tube, the smear tube being arranged on one side of the coupling liquid storage housing and being used for delivering the coupling liquid in the coupling liquid storage housing to the surface of the screw placed on the delivery assembly;

[0027] an extrusion plate, the extrusion plate being disposed in the coupling liquid storage housing and being slidably connected to an inner wall of the coupling liquid storage housing, and being used for extruding the coupling liquid in the coupling liquid storage housing;

[0028] A screw rod, the screw rod being arranged on one side of the extrusion plate, the screw rod being threadedly connected to one side of the coupling fluid storage housing, one end of the screw rod being rotatably connected to the extrusion plate, and the screw rod and the extrusion plate being rotatably snap-connected; one end of the screw rod being provided with a tooth groove;

[0029] A gear is arranged on one side of the screw rod, and the gear is meshed and connected with the screw rod through a tooth groove opened at one end of the screw rod.

[0030] Further technical solution: The auxiliary component also includes:

[0031] A fluid replenishing port is provided on one side of the coupling fluid storage housing and is used to replenish the coupling fluid in the coupling fluid storage housing.

[0032] Further technical solution: The device also includes:

[0033] a scraper, the scraper being provided on one side of the auxiliary component and being used for processing the coupling fluid on the surface of the screw on the conveying component;

[0034] A rotating shaft is rotatably arranged on the truss and is fixedly connected to the scraper.

[0035] Further technical solution: The conveying component specifically includes:

[0036] a conveyor belt, the conveyor belt being arranged on the platform;

[0037] A fixing hole is provided on the conveyor belt and is used for fixing screws.

[0038] Further technical solution: The depression recognition unit specifically includes:

[0039] A curve acquisition module is used to obtain a number of cross-sectional curves in the three-dimensional surface of the screw surface;

[0040] The drop value generation module is used to generate the surface drop value based on the cross-sectional curve; the surface drop value refers to the shortest distance between a point in the cross-sectional curve and the contact line; the contact line refers to the straight line formed between the highest point and the second highest point in the cross-sectional curve;

[0041] The drop value screening module is used to screen all surface drop values ​​and generate the maximum surface drop value;

[0042] The drop analysis module is used to determine whether there is a depression on the screw surface based on the maximum surface drop value.

[0043] Further technical solution: The depression analysis unit specifically includes:

[0044] A data acquisition module is used to obtain the volume value of the depression on the screw surface and the edge contour area of ​​the screw surface;

[0045] An initial dosage analysis module is used to generate an initial dosage of coupling fluid based on the edge contour area of ​​the screw surface; the initial dosage of coupling fluid refers to the product of the edge contour area of ​​the screw surface and the standard coating thickness;

[0046] The dosage setting module is used to generate a set amount of coupling fluid based on the initial dosage of the coupling fluid and the volume value of the depression on the screw surface; wherein the set amount of coupling fluid refers to the sum of the initial dosage of the coupling fluid and the volume value of the depression on the screw surface.

[0047] A screw production detection method, the method specifically comprising the following steps:

[0048] placing a screw on the conveying assembly;

[0049] Obtain the three-dimensional surface of the screw surface;

[0050] According to the three-dimensional curved surface of the screw surface, determine whether there is a depression on the screw surface;

[0051] If there is a depression on the screw surface, obtain the volume value of the depression and the edge contour area of ​​the screw surface to generate the set amount of coupling fluid;

[0052] According to the set amount of coupling liquid, the auxiliary component controls the amount of coupling liquid added to the screw surface;

[0053] The position of the ultrasonic detection component is adjusted by the truss to perform ultrasonic detection on the screws.

[0054] The present invention provides a screw production detection device and method, which have the following beneficial effects compared with the prior art:

[0055] The present invention can automatically apply coupling liquid to the surface of the screw through the auxiliary component, quickly identify the depression on the screw surface through the three-dimensional curved surface of the screw, and adjust the amount of coupling liquid according to the volume of the depression, so that the amount of coupling liquid applied to the screw surface can completely fill the depression area, reducing the risk of residual air cavity at the contact surface between the ultrasonic probe and the screw, thereby improving the accuracy of screw production inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1A schematic diagram of the three-dimensional structure of a screw production detection device provided in an embodiment of the present invention.

[0057] Figure 2 A schematic structural diagram of a conveying assembly provided in an embodiment of the present invention.

[0058] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0059] Figure 4 A schematic structural diagram of an auxiliary component provided in an embodiment of the present invention.

[0060] Figure 5 A schematic structural diagram of a truss provided in an embodiment of the present invention.

[0061] Figure 6 A schematic diagram of the structure of a control system provided by an embodiment of the present invention.

[0062] Figure 7 A flowchart of a screw production detection method provided by an embodiment of the present invention.

[0063] Notes on figure numbers: 1. Machine; 2. Conveying assembly; 3. Auxiliary assembly; 4. Scraper; 5. Ultrasonic detection assembly; 6. Truss; 7. Rotating shaft; 8. Collection chamber; 201. Conveyor belt; 202. Fixing hole; 203. Buffer pad; 301. Coupling liquid storage shell; 302. Applicator tube; 303. Extrusion plate; 304. Screw; 305. Gear; 306. Fluid filling port; 501. Probe; 502. Connecting cable; 503. Ultrasonic detector; 601. Cross bar; 602. Support member; 603. Threaded rod. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0065] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0066] like Figure 1 and Figure 6 FIG. 1 shows a screw production detection device provided by an embodiment of the present invention, comprising a machine 1, an ultrasonic detection assembly provided on one side of the machine 1, a truss 6 provided on one side of the ultrasonic detection assembly, and the truss 6 connected to the ultrasonic detection assembly; the detection device further comprises:

[0067] A conveying assembly 2, which is arranged on the machine platform 1 and is used to convey the screws to one side of the ultrasonic detection assembly;

[0068] An auxiliary component 3, which is provided on the machine platform 1 and is used to add coupling fluid to the surface of the screw;

[0069] A control system for controlling the amount of coupling fluid added by the auxiliary component 3 to the screw surface;

[0070] The control system specifically includes:

[0071] An image acquisition unit 10 is used to acquire a three-dimensional curved surface of the screw surface;

[0072] It should be noted that the screw surface refers to the surface of the screw that needs to be in contact with the ultrasonic detection component during ultrasonic detection. For example, when ultrasonic detection is performed on a screw, the ultrasonic detection component needs to be in contact with the screw head before detection can be performed. In this case, the screw surface refers to the surface of the screw head, and the three-dimensional curved surface of the screw surface is the three-dimensional curved surface of the screw head.

[0073] In this embodiment, before obtaining the three-dimensional curved surface of the screw surface, it is necessary to perform a simple cleaning of impurities on the screw surface. For example, before the screw is placed on the conveying assembly 2, it is necessary to clean the screw surface of debris, dust and other impurities to ensure that the screw is not affected by impurities during ultrasonic detection. In addition, impurities on the screw surface refer to non-fixed impurities, that is, impurities that can be removed by cleaning or other methods.

[0074] A depression recognition unit 20 is used to determine whether there is a depression on the screw surface based on the three-dimensional curved surface of the screw surface;

[0075] A depression analysis unit 30 is used to obtain the volume value of the depression and the edge contour area of ​​the screw surface if there is a depression on the screw surface, and generate a set amount of coupling liquid;

[0076] The control unit 40 is used to control the amount of coupling liquid added to the screw surface by the auxiliary component 3 according to the set amount of coupling liquid;

[0077] Specifically, according to the set amount of coupling liquid, the amount of coupling liquid applied to each screw by the auxiliary component 3 is controlled, that is, the amount of coupling liquid flowing out of the auxiliary component 3;

[0078] In addition, the amount of coupling fluid used can be appropriately increased to prevent the ultrasonic detection component from squeezing the coupling fluid from the screw surface when in contact with the screw surface, thereby reducing the coupling fluid retained on the contact surface between the ultrasonic detection component and the screw surface, resulting in inaccurate ultrasonic detection results; the specific increase in the amount of coupling fluid used can be set by relevant personnel in this field based on empirical formulas.

[0079] As a preferred embodiment of the present invention, the method of acquiring the three-dimensional curved surface of the screw surface in the image acquisition unit is specifically as follows:

[0080] Scan the screw surface with a laser scanner to generate a three-dimensional surface of the screw surface;

[0081] Specifically, the laser scanner illuminates the surface of the object with a laser beam and calculates the spatial coordinates of each point on the surface by receiving the reflected laser signal. These coordinates are synthesized into a unified three-dimensional model, duplicate points are eliminated, and data from multiple scanning positions are fused together. Data processing software (such as MeshLab, CloudCompare, Geomagic, etc.) is then used to reconstruct the point cloud and convert these points into a smooth three-dimensional surface to obtain the three-dimensional surface of the screw surface.

[0082] As a preferred embodiment of the present invention, the depression recognition unit specifically includes:

[0083] A curve acquisition module is used to obtain a number of cross-sectional curves in the three-dimensional surface of the screw surface;

[0084] It should be noted that a cross-sectional curve refers to the curve of a certain section in a three-dimensional surface. When obtaining a number of cross-sectional curves in the three-dimensional surface of a screw surface, cross-sectional curves in both the horizontal and vertical directions (i.e., the X-axis and Y-axis in the three-dimensional coordinate system) can be obtained at certain intervals. The cross-sectional curve can show the height difference of the screw surface at a certain section.

[0085] The drop value generation module is used to generate the surface drop value based on the cross-sectional curve; the surface drop value refers to the shortest distance between a point in the cross-sectional curve and the contact line; the contact line refers to the straight line formed between the highest point and the second highest point in the cross-sectional curve;

[0086] It should be noted that the highest point refers to the maximum coordinate value of the point in the cross-section curve on the Z axis in the 3D model, and the second highest point refers to the coordinate value of the point in the cross-section curve next to the highest point on the Z axis in the 3D model.

[0087] In addition, if there are multiple highest points in the cross-sectional curve, the value of the second highest point is still the Z-axis coordinate value of the highest point, that is, the contact line refers to the straight line formed by the two highest points in the cross-sectional curve;

[0088] In this embodiment, the highest point and the second highest point simulate the state when the ultrasonic detection component contacts the screw surface, that is, the highest point is the first landing point when the ultrasonic detection component contacts the screw surface, and the second highest point is the second landing point when the ultrasonic detection component contacts the screw surface. Since the cross-sectional curve is two-dimensional, there is no third landing point when the ultrasonic detection component contacts the screw surface. Therefore, the highest point and the second highest point of the self-selected area are selected;

[0089] The drop value screening module is used to screen all surface drop values ​​and generate the maximum surface drop value;

[0090] It should be noted that all surface drop values ​​refer to the surface drop values ​​in all cross-sectional curves (a single cross-sectional curve contains several surface drop values);

[0091] The drop analysis module is used to determine whether there is a depression on the screw surface based on the maximum surface drop value;

[0092] Specifically, the drop analysis value is compared with the drop threshold;

[0093] The drop threshold refers to the maximum depth of the cavity formed where the ultrasonic detector contacts the screw surface during ultrasonic testing without affecting the test results.

[0094] If the drop analysis value is less than the drop threshold, it means that the height difference of the current screw surface is within the normal range, and it is determined that there is no depression on the screw surface;

[0095] If the drop analysis value is greater than or equal to the drop threshold, it means that the height difference of the current screw surface is not within the normal range, and it is determined that there is a depression on the screw surface;

[0096] If there are no depressions on the screw surface, the smaller the drop analysis value, the flatter the screw surface. In this case, no additional coupling fluid needs to be applied to the screw surface; only a normal amount of coupling fluid is required. Furthermore, a normal amount of coupling fluid refers to an appropriate thickness of coupling fluid applied to the screw surface. For example, if the screw surface is flat, the thickness of the coupling fluid applied can be 0.1 mm (the average thickness of the coupling fluid is used).

[0097] When there are no depressions on the screw surface, the larger the drop analysis value, the more uneven the screw surface is, and additional coupling fluid needs to be applied to the screw surface.

[0098] As a preferred embodiment of the present invention, the depression analysis unit specifically includes:

[0099] A data acquisition module is used to obtain the volume value of the depression on the screw surface and the edge contour area of ​​the screw surface;

[0100] In this embodiment, the volume value of the depression on the surface of the screw can be obtained by substituting the three-dimensional curved surface of the screw surface into three-dimensional model software, such as solidworks and other three-dimensional model software; in addition, it can also be analyzed by numerical simulation software to accurately calculate the volume of the depression on the object, such as ANSYS, COMSOL, etc.; in addition, relevant personnel in this field can set the method of obtaining the volume value of the depression on the surface of the screw according to the time required for ultrasonic detection of the screw; for example, if the time required for ultrasonic detection of the screw is very short, numerical simulation software can be selected to obtain the volume value of the depression on the surface of the screw to ensure the real-time data acquisition, thereby completing real-time synchronization with the timing of replenishing the coupling liquid of the auxiliary component 3, and preventing the auxiliary component 3 from being unable to obtain the set amount of coupling liquid due to the long time of obtaining the volume value of the depression on the surface of the screw, thereby affecting the accuracy of the ultrasonic detection result of the screw;

[0101] An initial dosage analysis module is used to generate an initial dosage of coupling fluid based on the edge contour area of ​​the screw surface; the initial dosage of coupling fluid refers to the product of the edge contour area of ​​the screw surface and the standard coating thickness;

[0102] The standard coating thickness refers to the average coating thickness of the coupling fluid applied to the surface of the screw before ultrasonic detection when the surface of the screw is in a flat state;

[0103] For example, by formula:

[0104] ;

[0105] Generate the initial amount of coupling fluid ;

[0106] In the formula, It represents the edge contour area of ​​the screw surface. Indicates standard application thickness.

[0107] The dosage setting module is used to generate a set amount of coupling fluid based on the initial dosage of the coupling fluid and the volume value of the depression on the screw surface; wherein the set amount of coupling fluid refers to the sum of the initial dosage of the coupling fluid and the volume value of the depression on the screw surface.

[0108] like Figure 1 As shown, as a preferred embodiment of the present invention, the ultrasonic detection component specifically includes:

[0109] A probe 501 is provided on one side of the platform 1;

[0110] An ultrasonic detector 503, which is disposed on one side of the conveying component 2;

[0111] A connecting cable 502 is provided between the probe 501 and the ultrasonic detector 503 , with one end of the connecting cable 502 connected to the ultrasonic detector 503 and the other end connected to the probe 501 ;

[0112] Specifically, by starting the ultrasonic detector 503, the ultrasonic detector 503 prompts the probe 501 to perform ultrasonic testing on the screw through the connecting cable 502, thereby completing the detection of internal defects of the screw; in addition, the internal quality of the screw can be judged based on the results of the ultrasonic testing.

[0113] like Figure 1 and Figure 5 As shown, as a preferred embodiment of the present invention, the truss 6 specifically includes:

[0114] A support member 602 , the support member 602 being disposed on one side of the platform 1 ;

[0115] A crossbar 601 is slidably disposed in a sliding groove defined by the support member 602;

[0116] A threaded rod 603, wherein the threaded rod 603 is disposed in a sliding groove defined by the support member 602, with both ends of the threaded rod 603 being rotatably connected to the support member 602, and the threaded rod 603 being threadedly connected to the cross bar 601;

[0117] Specifically, by rotating the threaded rod 603, the threaded rod 603 is threadedly connected to the cross bar 601, so that the threaded rod 603 drives the cross bar 601 to perform linear motion. When the cross bar 601 performs linear motion, the cross bar 601 drives the ultrasonic detection component to move, so that the ultrasonic detection component can detect the screw through ultrasonic waves.

[0118] In this embodiment, the methods for driving the threaded rod 603 to rotate include but are not limited to a servo motor, a telescopic rod and a connecting rod combined drive, etc.

[0119] In addition, the purpose of the cross bar 601 driving the ultrasonic detection component to move is to bring the ultrasonic detection component into contact with the surface of the screw, so that the ultrasonic detection component can better perform ultrasonic detection on the inside of the screw, thereby judging whether there are defects inside the screw based on the ultrasonic detection results.

[0120] like Figure 1 and Figure 4 As shown, as a preferred embodiment of the present invention, the auxiliary component 3 specifically includes:

[0121] A coupling liquid storage housing 301 is provided on one side of the machine 1 and is used to store the coupling liquid required for ultrasonic testing;

[0122] an application tube 302 , which is provided on one side of the coupling liquid storage housing 301 and is used to deliver the coupling liquid in the coupling liquid storage housing 301 to the surface of the screw placed on the delivery component 2 ;

[0123] a squeezing plate 303 , the squeezing plate 303 being disposed in the coupling liquid storage housing 301 and being slidably connected to the inner wall of the coupling liquid storage housing 301 , for squeezing the coupling liquid in the coupling liquid storage housing 301 ;

[0124] A screw rod 304 is provided on one side of the extrusion plate 303 and is threadedly connected to one side of the coupling fluid storage housing 301. One end of the screw rod 304 is rotatably connected to the extrusion plate 303, and a rotatable snap-fit ​​connection is formed between the screw rod 304 and the extrusion plate 303. One end of the screw rod 304 has a tooth groove.

[0125] A gear 305 is provided on one side of the screw rod 304 and is meshed with the screw rod 304 via a tooth groove provided at one end of the screw rod 304;

[0126] Specifically, by rotating the gear 305, the gear 305 drives the screw rod 304 to rotate. When the screw rod 304 rotates, since the screw rod 304 is threadedly connected to the coupling liquid storage housing 301, the screw rod 304 simultaneously performs linear motion during rotation, so that one end of the screw rod 304 drives the extrusion plate 303 to perform linear motion along the inner wall of the coupling liquid storage housing 301; when the extrusion plate 303 performs linear motion, the extrusion plate 303 squeezes the coupling liquid in the coupling liquid storage housing 301 to one side of the coupling liquid storage housing 301, thereby causing the coupling liquid in the coupling liquid storage housing 301 to flow out through the application tube 302 and finally flow to the screw surface on the conveying component 2;

[0127] In this embodiment, the connection between one end of the application tube 302 and the coupling liquid storage housing 301 is in a communicating state, that is, the coupling liquid in the coupling liquid storage housing 301 can flow out of the coupling liquid storage housing 301 through the one end of the application tube 302, and then flow to the screw surface on the conveying assembly 2 from the other end of the application tube 302. In addition, the connection between the one end of the application tube 302 and the coupling liquid storage housing 301 can be set at a high position of the coupling liquid storage housing 301 to prevent the coupling liquid in the coupling liquid storage housing 301 from flowing out of the coupling liquid storage housing 301 uncontrollably due to factors such as gravity when the connection is set too low.

[0128] It should be noted that when ultrasonic testing is performed on screws, the probe 501 in the ultrasonic detection assembly needs to be in contact with the surface of the screw; however, due to the diverse shapes of the screws and the presence of depressions on the surface of the screws, when the probe 501 contacts the surface of the screw, there will be depressions at the contact point, which prevents the probe 501 from fully contacting the surface of the screw, thereby forming an air cavity, which ultimately affects the ultrasonic detection results of the screw by the ultrasonic detection assembly; and in the ultrasonic detection process, the air cavity at the contact point between the screw and the probe 501 is filled with coupling fluid, which can greatly reduce the impact of the depressions on the screw surface on the accuracy of the ultrasonic detection results.

[0129] like Figure 4 As shown, as a preferred embodiment of the present invention, the auxiliary component 3 further includes:

[0130] a fluid replenishing port 306 , which is provided on one side of the coupling fluid storage housing 301 and is used to replenish the coupling fluid in the coupling fluid storage housing 301 ;

[0131] Specifically, the coupling liquid that needs to be replenished is delivered to the coupling liquid storage housing 301 through the liquid replenishment port 306. The coupling liquid replenishment causes the pressure to increase, pushing the extrusion plate 303 to move in the opposite direction, so that the space formed by the coupling liquid storage housing 301 and the extrusion plate 303 is filled with coupling liquid.

[0132] It should be noted that before the coupling fluid to be replenished is delivered to the coupling fluid storage housing 301 through the fluid replenishment port 306, the outflow port of the application tube 302 needs to be blocked. This is to prevent the coupling fluid in the coupling fluid storage housing 301 from flowing out of the outflow port of the application tube 302, which would cause the extrusion plate to fail to move (its volume cannot increase, and its pressure does not change). This would prevent the extrusion plate 303 from sliding in the opposite direction, thus failing to replenish the coupling fluid in the coupling fluid storage housing 301.

[0133] Furthermore, when the outflow port of the application tube 302 is blocked, adding coupling liquid to the coupling liquid storage housing 301 will cause the volume inside the coupling liquid storage housing 301 to increase. As the volume increases, the required storage space will also increase accordingly. If the current storage space for the coupling liquid is less than the required storage space, a pressure difference will be generated inside the coupling liquid storage housing 301, forcing the coupling liquid to push the extrusion plate 303 to slide in the opposite direction, thereby expanding the storage space for the coupling liquid.

[0134] When the coupling liquid is replenished, the liquid replenishing port 306 can be sealed by a piston or other object to prevent the coupling liquid in the coupling liquid storage housing 301 from flowing out from the liquid replenishing port 306, causing the coupling liquid to be unable to be transported to the designated location.

[0135] like Figure 1 and Figure 5 As shown, as a preferred embodiment of the present invention, a screw production detection device provided by an embodiment of the present invention further includes:

[0136] a scraper 4, the scraper 4 being provided on one side of the auxiliary component 3 and being used for processing the coupling liquid on the surface of the screw on the conveying component 2;

[0137] A rotating shaft 7, the rotating shaft 7 is rotatably disposed on the truss 6, and the rotating shaft 7 is fixedly connected to the scraper 4;

[0138] Specifically, when the conveying component 2 is running, the conveying component 2 will drive the screw to move linearly, so that the screw is in contact with the scraper 4; when the screw is in contact with the scraper 4, the conveying component 2 continues to drive the screw to move linearly, and the screw moves on one side of the scraper 4. Since the scraper 4 is connected to the truss 6 through the rotating shaft 7, the scraper 4 will move in a circular motion with the rotating shaft 7 as the center, and the contact point between the scraper 4 and the screw surface will slide along the screw surface, so that the coupling liquid on the screw surface can be evenly spread and the excess coupling liquid can be scraped off; if the conveying component 2 continues to move, the conveying component 2 will drive the screw to continue to move linearly until the contact connection state between the screw surface and the scraper 4 disappears, and the scraper 4 will be reset due to gravity until the next screw is in contact with the scraper 4, and the operation is repeated.

[0139] like Figure 2 and Figure 3 As shown, as a preferred embodiment of the present invention, the conveying component 2 specifically includes:

[0140] A conveyor belt 201, wherein the conveyor belt 201 is arranged on the machine platform 1;

[0141] A fixing hole 202 is provided on the conveyor belt 201 and is used for fixing screws;

[0142] Specifically, inserting the screw into the fixing hole 202 with the head facing upward can prevent the fixing hole 202 from being displaced during ultrasonic detection by the ultrasonic detection component, thereby improving the accuracy of the ultrasonic detection result of the ultrasonic detection component on the screw;

[0143] In this embodiment, the conveyor belt 201 rotates intermittently, that is, after the conveyor belt 201 rotates a certain distance, it stops rotating for a period of time, and then continues to rotate for a certain distance. By repeating this operation, the conveyor belt 201 completes intermittent rotation;

[0144] The first distance that the conveyor belt 201 rotates is the distance required to transport the screw from the side of the auxiliary component 3 to the side of the ultrasonic detection component, and the period of time during which the conveyor belt 201 stops rotating is the maximum value between the time required for the auxiliary component 3 to transport the coupling liquid to the screw surface and the time required for the ultrasonic detection component to perform ultrasonic detection on the screw; for example, the time required for the auxiliary component 3 to transport the coupling liquid to the screw surface is 2 seconds, and the time required for the ultrasonic detection component to perform ultrasonic detection on the screw is 8 seconds, then the period of time during which the conveyor belt 201 stops rotating is 8 seconds; in actual applications, the time required for the ultrasonic detection component to perform ultrasonic detection on the screw needs to vary according to the detection requirements. If the screw needs to be tested multiple times or analyzed with higher precision, such as detecting internal defects and thickness of the material, the detection time may be longer, and may even take several minutes. The 8-second time required for the ultrasonic detection component to perform ultrasonic detection on the screw as exemplified here is the time required for conventional ultrasonic detection and is only exemplary data;

[0145] It should be noted that the fixing hole 202 can also be set as a clamping component so that it can accommodate screws of more sizes, and the material of the clamping component can be plastic, rubber, etc. Compared with metal materials, these materials will not cause significant interference to the ultrasonic signal, thereby reducing the impact of their material on the ultrasonic detection results.

[0146] like Figure 2 and Figure 3 As shown, as a preferred embodiment of the present invention, the conveying component 2 further includes:

[0147] A buffer pad 203 is fixedly disposed on the conveyor belt 201 , and an inner ring of the buffer pad 203 is coaxial with the opening of the fixing hole 202 ;

[0148] It should be explained that the inner circle of the buffer pad 203 and the opening of the fixing hole 202 are coaxial, which means that the line connecting the center of the inner circle of the buffer pad 203 and the center of the buffer pad 203 is perpendicular to the surface of the conveyor belt 201.

[0149] In this embodiment, when the ultrasonic detection component performs ultrasonic detection on the screw surface, the ultrasonic detection component needs to contact the screw surface. The buffer pad 203 is provided on the conveyor belt 201 to prevent the ultrasonic detection component from applying too much pressure on the screw surface when contacting the screw surface, resulting in excessive pressure between the screw surface and the conveyor belt 201, thereby causing damage to the screw surface. The buffer pad 203 can play a buffering role.

[0150] like Figure 2 As shown, as a preferred embodiment of the present invention, a collecting chamber 8 is further provided on one side of the machine 1, and the collecting chamber 8 is used to collect screws dropped from the conveying assembly 2;

[0151] In this embodiment, after the screw has completed ultrasonic testing by the ultrasonic detection assembly, the conveyor belt 201 will continue to drive the screw to perform linear motion until the screw reaches the bend of the conveyor belt 201. At this time, if the conveyor belt 201 continues to rotate, the screw will fall off from the fixing hole 202 due to gravity and fall into the collection chamber 8, completing the collection of the tested screws and also freeing up the required space for screws that need to be tested later.

[0152] In addition, the present invention can also provide a sorting device on one side of the conveying component 2 to sort the screws according to the ultrasonic detection results of the screws; for example, a sorting component is provided on the machine 1, and the sorting component sorts the screws with abnormal ultrasonic detection results, and the screws that fall into the collection chamber 8 are screws with normal ultrasonic detection results.

[0153] like Figure 7 As shown, the present invention also provides a screw production detection method, which is applied to the above-mentioned screw production detection device and specifically includes the following steps:

[0154] Step 1: Place the screw on the conveying component 2;

[0155] Step 2: Obtain the three-dimensional surface of the screw surface;

[0156] Step 3: Based on the three-dimensional surface of the screw, determine whether there are any depressions on the screw surface;

[0157] Step 4: If there is a depression on the screw surface, obtain the volume value of the depression and the edge contour area of ​​the screw surface to generate the set amount of coupling fluid;

[0158] Step 5: According to the set amount of coupling liquid, the auxiliary component 3 controls the amount of coupling liquid added to the screw surface;

[0159] Step 6: Adjust the position of the ultrasonic detection assembly through the truss 6 and perform ultrasonic detection on the screws;

[0160] Specifically, the step 3 specifically includes:

[0161] Obtain several cross-sectional curves in the three-dimensional surface of the screw surface;

[0162] Generate a surface drop value based on the cross-sectional curve. The surface drop value refers to the shortest distance between a point in the cross-sectional curve and the contact line. The contact line refers to the straight line formed between the highest point and the second highest point in the cross-sectional curve.

[0163] Screen all surface drop values ​​and generate the maximum surface drop value;

[0164] According to the maximum surface drop value, determine whether there is a depression on the screw surface;

[0165] Specifically, the step 4 includes:

[0166] Obtain the volume value of the concave part of the screw surface and the edge contour area of ​​the screw surface;

[0167] Generate an initial amount of coupling fluid based on the edge contour area of ​​the screw surface; the initial amount of coupling fluid refers to the product of the edge contour area of ​​the screw surface and the standard coating thickness;

[0168] A set amount of coupling fluid is generated according to the initial amount of coupling fluid and the volume value of the depression on the screw surface; wherein the set amount of coupling fluid refers to the sum of the initial amount of coupling fluid and the volume value of the depression on the screw surface.

[0169] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A screw production detection device, comprising a machine (1), wherein an ultrasonic detection component is provided on one side of the machine (1), characterized in that: A truss (6) is provided on one side of the ultrasonic detection assembly, and the truss (6) is connected to the ultrasonic detection assembly; the detection device also includes: A conveying assembly (2), the conveying assembly (2) being arranged on the machine platform (1) and being used for conveying the screws to one side of the ultrasonic detection assembly; An auxiliary component (3), the auxiliary component (3) being arranged on the machine platform (1) and being used for adding coupling fluid to the surface of the screw; A control system for controlling the amount of coupling fluid added to the screw surface by the auxiliary component (3); The control system specifically includes: An image acquisition unit, used for acquiring a three-dimensional surface of the screw surface; A depression recognition unit is used to determine whether there is a depression on the screw surface based on the three-dimensional curved surface of the screw surface; A depression analysis unit, if there is a depression on the screw surface, is used to obtain the volume value of the depression and the edge contour area of ​​the screw surface to generate a set amount of coupling fluid; A control unit, for controlling the amount of coupling liquid added to the screw surface by the auxiliary component (3) according to a set amount of coupling liquid; The depression analysis unit specifically includes: A data acquisition module is used to obtain the volume value of the depression on the screw surface and the edge contour area of ​​the screw surface; An initial dosage analysis module is used to generate an initial dosage of coupling fluid based on the edge contour area of ​​the screw surface; the initial dosage of coupling fluid refers to the product of the edge contour area of ​​the screw surface and the standard coating thickness; The dosage setting module is used to generate a set amount of coupling fluid based on the initial dosage of the coupling fluid and the volume value of the depression on the screw surface; wherein the set amount of coupling fluid refers to the sum of the initial dosage of the coupling fluid and the volume value of the depression on the screw surface.

2. A screw production detection device according to claim 1, characterized in that: The ultrasonic detection component specifically includes: A probe (501), the probe (501) being arranged on one side of the machine (1); an ultrasonic detector (503), the ultrasonic detector (503) being arranged on one side of the conveying component (2); A connecting cable (502) is provided between the probe (501) and the ultrasonic detector (503), one end of the connecting cable (502) is connected to the ultrasonic detector (503) and the other end is connected to the probe (501).

3. The screw production detection device according to claim 1, characterized in that: The truss (6) specifically includes: A support member (602), the support member (602) being arranged on one side of the machine platform (1); A crossbar (601), wherein the crossbar (601) is slidably disposed in a sliding groove provided in the support member (602); A threaded rod (603) is arranged in a sliding groove provided in the support member (602), both ends of the threaded rod (603) are rotatably connected to the support member (602), and the threaded rod (603) is threadedly connected to the cross bar (601).

4. The screw production detection device according to claim 1, characterized in that: The auxiliary component (3) specifically includes: A coupling liquid storage housing (301), the coupling liquid storage housing (301) being arranged on one side of the machine (1) and being used for storing coupling liquid required for ultrasonic testing; an smear tube (302), the smear tube (302) being arranged on one side of the coupling liquid storage housing (301) and being used for conveying the coupling liquid in the coupling liquid storage housing (301) to the surface of the screw placed on the conveying assembly (2); an extrusion plate (303), the extrusion plate (303) being arranged in the coupling liquid storage housing (301), and the extrusion plate (303) being slidably connected to the inner wall of the coupling liquid storage housing (301), and being used for extruding the coupling liquid in the coupling liquid storage housing (301); a screw rod (304), the screw rod (304) being arranged on one side of the extrusion plate (303), the screw rod (304) being threadedly connected to one side of the coupling liquid storage housing (301), one end of the screw rod (304) being rotatably connected to the extrusion plate (303), and a rotatable snap-fit ​​connection being formed between the screw rod (304) and the extrusion plate (303); a tooth groove being provided at one end of the screw rod (304); A gear (305) is provided on one side of the screw rod (304), and the gear (305) is meshedly connected with the screw rod (304) via a tooth groove provided at one end of the screw rod (304).

5. The screw production detection device according to claim 4, characterized in that: The auxiliary component (3) further comprises: A liquid replenishing port (306) is provided on one side of the coupling liquid storage housing (301) and is used to replenish the coupling liquid in the coupling liquid storage housing (301).

6. The screw production detection device according to claim 1, characterized in that: The device also includes: a scraper (4), the scraper (4) being arranged on one side of the auxiliary component (3) and being used for processing the coupling fluid on the surface of the screw on the conveying component (2); A rotating shaft (7), the rotating shaft (7) is rotatably arranged on the truss (6), and the rotating shaft (7) is fixedly connected to the scraper (4).

7. The screw production detection device according to claim 1, characterized in that: The conveying component (2) specifically includes: A conveyor belt (201), wherein the conveyor belt (201) is arranged on the machine platform (1); A fixing hole (202), the fixing hole (202) is opened on the conveyor belt (201) and is used for fixing screws.

8. The screw production detection device according to claim 1, characterized in that: The depression recognition unit specifically includes: A curve acquisition module is used to obtain a number of cross-sectional curves in the three-dimensional surface of the screw surface; The drop value generation module is used to generate the surface drop value based on the cross-sectional curve; the surface drop value refers to the shortest distance between a point in the cross-sectional curve and the contact line; the contact line refers to the straight line formed between the highest point and the second highest point in the cross-sectional curve; The drop value screening module is used to screen all surface drop values ​​and generate the maximum surface drop value; The drop analysis module is used to determine whether there is a depression on the screw surface based on the maximum surface drop value.

9. A screw production detection method, characterized in that: The method is applied to a screw production detection device according to any one of claims 1 to 8, and specifically comprises the following steps: Placing a screw on the conveying assembly (2); Obtain the three-dimensional surface of the screw surface; According to the three-dimensional curved surface of the screw surface, determine whether there is a depression on the screw surface; If there is a depression on the screw surface, obtain the volume value of the depression and the edge contour area of ​​the screw surface to generate the set amount of coupling fluid; According to the set amount of coupling liquid, controlling the amount of coupling liquid added to the screw surface by the auxiliary component (3); The position of the ultrasonic detection component is adjusted by the truss (6) to perform ultrasonic detection on the screws.

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