Plate skin layer bonding detection device and detection method

Abstract

The invention discloses a plate skin layer bonding detection device and detection method, and relates to the technical field of plate detection, the device comprises a detection table on which a plate body is placed, a detection frame capable of lifting and translating along the length and width directions of the detection table is arranged above the detection table, and a plurality of uniformly distributed cylinders are embedded in the detection frame in a penetrating manner; a liftable magnetic distance measuring assembly is movably arranged in the cylinder, a steel ball is attracted to the lower portion of the magnetic distance measuring assembly, the magnetic distance measuring assembly is used for detecting the rebound height of the steel ball after the steel ball falls to the plate body, a lower shell cover is connected to the position, close to the bottom end, of the cylinder, and an identification mechanism is installed between the lower shell cover and the cylinder. Based on the collision rebound principle, high-precision defect recognition is achieved through the multi-sensor fusion technology, the method has the advantages of being reliable in detection result, accurate in marking and high in adaptability, and the detection efficiency and accuracy can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate detection, and in particular to a plate skin layer bonding detection device and a detection method. BACKGROUND

[0002] As a kind of widely used in building, furniture manufacturing, decoration and other fields of base material, its surface is often attached, sprayed or laminated process to add functional or decorative skin layer. The bonding quality between the skin layer and the base material directly affects the durability, aesthetics and safety of the plate. If there is an un-bonding area or gap between the skin layer and the base material, peeling, cracking, bulging and other problems may occur during use, which not only affects the appearance of the product, but also may accelerate material aging and reduce the service life. Therefore, the rapid and accurate detection of the bonding quality of the skin layer and the base material is one of the key links to ensure the quality of the plate product.

[0003] At present, the detection methods for the bonding state of the plate skin layer in the prior art mainly include manual knocking method, ultrasonic detection method, infrared thermal imaging detection method, etc. The manual knocking method relies on the operator to knock the surface of the plate and listen to the sound difference (such as empty sound, dull sound) to determine whether there is a poor bonding area, which is highly subjective and highly dependent on the experience of the personnel, and the efficiency is low, and it is difficult to realize large-scale automatic detection. The ultrasonic detection method uses the characteristics of reflection or attenuation of ultrasonic waves when they propagate in materials to make judgments. Although this method has high precision, it is expensive and slow, and requires high surface flatness and internal structure uniformity, which is not suitable for on-site rapid screening. The infrared thermal imaging method identifies bonding defects by heating the surface of the plate and observing the temperature distribution difference with a thermal imager, but this method is easily disturbed by environmental temperature, plate material and coating color, and has poor detection result stability and high equipment cost. SUMMARY

[0004] The present application provides a plate skin layer bonding detection device and a detection method, which can solve the problems of strong subjectivity of detection results, inability to quantify and low efficiency of manual knocking method in the prior art, and expensive equipment, complex operation, high environmental requirements and difficulty in applying to online rapid detection of ultrasonic and infrared detection methods.

[0005] The object of the present application can be achieved by the following technical solutions: The first aspect of the present application provides a kind of plate skin bonding detection device and detection method, including the detection table of plate body placement, the detection frame of being liftable and being able to be translated along its length and width direction is equipped at the top of the detection table, multiple uniform distribution cylinder is inlaid in the detection frame, liftable magnetic attraction distance measuring assembly is movably arranged in the cylinder, steel ball is adsorbed below the magnetic attraction distance measuring assembly, and magnetic attraction distance measuring assembly is used to detect the rebound height of steel ball after falling to plate body, lower shell cover is connected at the position close to the bottom of the cylinder, identification mechanism is installed between the lower shell cover and the cylinder, when the maximum height of steel ball rebound detected by the magnetic attraction distance measuring assembly does not reach the set threshold, identification mechanism is used to mark at the corresponding position of plate body.

[0006] As a further aspect of the present application: the magnetic attraction distance measuring assembly includes a ring-shaped electromagnet, a spherical groove, a distance measuring hole, a protective cover, and a distance measuring instrument. The ring-shaped electromagnet is slidingly arranged in the cylinder. The spherical groove is opened at the bottom of the ring-shaped electromagnet and corresponds to the steel ball. The distance measuring hole penetrates the bottom of the spherical groove. The protective cover is installed on the top of the ring-shaped electromagnet and covers the distance measuring hole. The distance measuring instrument is installed on the top end of the lower surface of the protective cover and corresponds to the position of the distance measuring hole.

[0007] As a further aspect of the present application: the identification mechanism includes an upper shell cover with an air inlet valve, a seal, a piston, a negative pressure assembly, an L-shaped rod, a guide frame, a fixed ring, and a spring. The upper shell cover is located above the lower shell cover and is fixedly sleeved outside the cylinder. The piston is slidingly arranged in the upper shell cover. The guide frame is symmetrically arranged outside the cylinder. The seal is located in the lower shell cover. Two L-shaped rods are symmetrically arranged outside the seal. The top end of the L-shaped rod penetrates the top of the lower shell cover and passes through the guide hole of the guide frame to connect with the bottom of the piston. The fixed ring is installed on the L-shaped rod. The spring is sleeved on the L-shaped rod and connected between the fixed ring and the guide frame. The negative pressure assembly is arranged on the top of the upper shell cover.

[0008] As a further aspect of the present application: the magnetic attraction distance measuring assembly further includes a ring-shaped horn mouth arranged at the bottom of the ring-shaped electromagnet. The ring-shaped horn mouth is smoothly arranged with the bottom end slot of the spherical groove, and the caliber of the ring-shaped horn mouth gradually increases from the direction away from the spherical groove.

[0009] As a further aspect of the present application: the seal includes a ring-shaped shell and a sponge body. The ring-shaped shell is a hollow structure with an open bottom. The sponge body is installed in the ring-shaped shell, and the lower part of the sponge body extends to the outside of the ring-shaped shell. The end of the L-shaped frame away from the piston is connected with the outer wall of the ring-shaped shell.

[0010] As a further scheme of the present application: the top end lower surface of the lower shell is provided with a sound pressure sensor for detecting the impact sound of the steel ball and the plate body, and the lower shell is further provided with a processor electrically connected with the sound pressure sensor and the range finder respectively, and the detection frame is provided with a controller electrically connected with the processor.

[0011] As a further scheme of the present application: the negative pressure assembly comprises an air suction pump, an L-shaped pipe and a branch pipe with a valve, the air suction pump is installed on the top of the detection frame near one end, the air inlet end of the air suction pump is connected with the L-shaped pipe, the end of the L-shaped pipe away from the air suction pump is in a closed structure, the upper shell and the L-shaped pipe are connected through the branch pipe, and the valve is installed on the branch pipe.

[0012] As a further scheme of the present application: the detection table is symmetrically provided with transverse guide rails near the two sides of the top, the transverse guide rails are provided with first electric sliding blocks capable of walking thereon, the top of the first electric sliding blocks is provided with a stand column, a U-shaped sleeve is slidably arranged on the stand column, longitudinal guide rails are arranged between the two U-shaped sleeves, the second electric sliding blocks connected with the detection frame are arranged on the longitudinal guide rails, the open ends of the two U-shaped sleeves are jointly connected with a U-shaped plate, a first motor is installed on the end of the U-shaped plate, a rotating rod is connected with the output end of the first motor, a recess is formed in the side of the stand column close to the U-shaped plate, a rack is arranged in the recess, a gear corresponding to the rack is arranged on the rotating rod, an opening is formed through the U-shaped plate for the gear to extend into, and the gear is engaged with the rack.

[0013] As a further scheme of the present application: the detection frame is provided with a lifting mechanism for sliding the ring-shaped electromagnet, the lifting mechanism comprises a second motor, a lead screw, a cross column and a sliding rod, the bottom end of the sliding rod is connected with the top end of the protective cover, the top end of the sliding rod is slidably arranged through the top of the cylinder and connected with the cross column, the second motor is installed on the bottom of the detection frame, the bottom end of the lead screw is arranged through the detection frame and connected with the output shaft of the second motor, and the cross column is threadedly sleeved with the lead screw.

[0014] The second aspect of the present application provides a detection method of a plate skin layer bonding detection device, which is applied to the plate skin layer bonding detection device and comprises the following steps: Step one: place the plate body on the upper surface of the detection table, and adjust the height of the detection frame so that the lower shell at the bottom end of the cylinder is attached to the upper surface of the plate body; Step two: control the magnetic attraction range finding assembly to cancel the adsorption force on the steel ball, so that the steel ball freely falls in the cylinder and collides with the plate body, the steel ball rebounds after the collision, and the maximum height of the steel ball rebound is detected by the magnetic attraction range finding assembly. Step three, compare the maximum height of the steel ball rebound, if it does not reach the set height threshold, the linkage marking mechanism marks on the corresponding upper surface of the plate body; Step four, control the magnetic attraction distance measuring assembly to descend to adsorb the falling steel ball, and rise to reset after adsorption, then adjust the position of the detection frame to make the steel ball correspond to other undetected areas of the plate body, and repeat the previous operation to comprehensively detect the plate body.

[0015] The beneficial effects of the present application are: 1、In the present application, by setting the detection frame that can be lifted and bidirectionally translated, the distributed cylinder structure with the built-in magnetic attraction distance measuring assembly, and the quantitative detection mechanism based on the rebound height of the steel ball, a complete automatic detection system is constructed. The device controls the standard free fall motion of the steel ball, and accurately measures the rebound height after the collision with the plate, which converts the abstract index of the skin bonding quality into a quantifiable physical quantity. The areas with firm bonding are supported by the substrate, the collision energy loss is small, and the rebound height is high; while the areas with defects such as hollowing and delamination have gaps between the skin and the substrate, the collision energy is partially absorbed or dispersed, resulting in a significant decrease in the rebound height. By comparing the measured value with the preset height threshold, the bonding defects can be objectively and accurately judged, and the core pain points of the traditional manual knocking method, such as dependence on subjective experience, inability to quantify, and poor consistency, are completely solved.

[0016] 2、In the present application, the magnetic attraction distance measuring assembly, steel ball release, and marking mechanism are integrated in each detection unit, and are matched with the movable detection frame, realizing full-process automation from positioning, detection, judgment to marking. During detection, the lower shell is attached to the surface of the plate, forming a relatively closed detection environment, effectively reducing external airflow, noise, and random errors caused by steel ball deviation, ensuring the consistency of each collision test, and greatly improving the reliability and repeatability of the detection results. After detection, the magnetic attraction distance measuring assembly can automatically descend to recover the steel ball and reset for the next detection, while the marking mechanism is only triggered for marking when defects are found, avoiding waste of resources. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings.

[0018] Figure 1 is a first perspective view of a plate skin bonding detection device of the present application; Figure 2 is a second perspective view of a plate skin bonding detection device of the present application; Figure 3 is a sectional view of a plate skin bonding detection device of the present application; Figure 4This is a cross-sectional view of the connection between the cylinder and the lower shell in a sheet metal skin adhesion testing device of the present invention; Figure 5 This is a perspective view of the connection between the cylinder and the testing frame in a sheet metal skin adhesion testing device of the present invention; Figure 6 This is a perspective view of the magnetic distance measuring component in a sheet metal skin adhesion detection device of the present invention; Figure 7 This is a partial cross-sectional view of the marking mechanism in a sheet metal skin adhesion detection device of the present invention; Figure 8 This is a perspective view of the connection between the testing frame and the U-shaped plate in a sheet metal skin adhesion testing device of the present invention; Figure 9 This is a perspective view of the negative pressure component in a sheet metal skin adhesion testing device of the present invention.

[0019] In the diagram: 100, Plate body; 200, Inspection table; 201, Transverse guide rail; 202, First electric slider; 203, Column; 204, U-shaped sleeve; 205, Longitudinal guide rail; 206, Second electric slider; 207, First motor; 208, Rotating rod; 209, Rack; 2010, Gear; 2011, U-shaped plate; 300, Inspection frame; 301, Controller; 400, Cylinder; 500, Magnetic distance measuring component; 501, Ring electromagnet; 502, Spherical groove; 503, Distance measuring hole; 504, Protective cover; 505, Distance meter; 506, Ring horn 600, steel ball; 700, lower housing; 701, sound pressure sensor; 800, marking mechanism; 801, air intake valve; 802, upper housing; 803, stamp; 8031, annular shell; 8032, sponge; 804, piston; 805, negative pressure assembly; 8051, air pump; 8052, L-shaped pipe; 8053, valve; 8054, branch pipe; 806, L-shaped rod; 807, guide frame; 808, fixing ring; 809, spring; 900, lifting mechanism; 901, second motor; 902, lead screw; 903, crossbar; 904, slide bar. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1-9As shown, the present invention is a sheet metal skin adhesion testing device, including a testing platform 200 on which a sheet metal body 100 is placed. Above the testing platform 200 is a testing frame 300 that can be raised and lowered and can be translated along its length and width. Multiple uniformly distributed cylinders 400 are embedded through the testing frame 300. A magnetically adjustable distance measuring component 500 is movably arranged inside the cylinder 400. A steel ball 600 is attracted below the magnetically adjustable distance measuring component 500, and the magnetically adjustable distance measuring component 500 is used to detect the rebound height of the steel ball 600 after it falls onto the sheet metal body 100. A lower shell cover 700 is connected to the cylinder 400 near the bottom. A marking mechanism 800 is installed between the lower shell cover 700 and the cylinder 400. When the maximum rebound height of the steel ball 600 detected by the magnetically adjustable distance measuring component 500 does not reach a set threshold, the marking mechanism 800 is used to mark the corresponding position on the sheet metal body 100.

[0022] It should be noted that during use, the plate body 100 to be tested is placed on the testing table 200. The position of the lifting and planar movable testing frame 300 is adjusted by controlling the movement of the frame, so that the lower shells 700 at the bottom of the multiple evenly distributed cylinders 400 are in close contact with the surface of the plate. Then, the magnetic ranging component 500 inside the cylinder 400 releases its attraction to the steel ball 600. The steel ball 600 falls freely along the cylinder 400 and impacts the surface of the plate body 100. In areas with strong adhesion, the steel ball 600 rebounds more due to the solid support of the substrate, while in areas with hollow defects, the rebound height is significantly reduced due to energy absorption. When the rebound height at a certain point does not reach the set threshold, the marking mechanism 800 is immediately triggered to mark the corresponding position on the plate. After completing the single-point test, the magnetic ranging component 500 automatically descends to attract the steel ball 600 and resets. Then, the testing frame 300 moves to the next testing area according to the preset path, and the above process is repeated until the entire plate is scanned.

[0023] like Figure 4 and Figure 6 As shown, the magnetic ranging assembly 500 includes an annular electromagnet 501, a spherical groove 502, a ranging hole 503, a protective cover 504, and a rangefinder 505. The annular electromagnet 501 is slidably disposed inside the cylinder 400. The spherical groove 502 is formed at the bottom of the annular electromagnet 501 and corresponds to the steel ball 600. The ranging hole 503 penetrates the bottom of the spherical groove 502. The protective cover 504 is installed on the top of the annular electromagnet 501 and covers the ranging hole 503. The rangefinder 505 is installed on the lower surface of the top of the protective cover 504 and corresponds to the position of the ranging hole 503.

[0024] It should be noted that when the annular electromagnet 501 is energized, it generates magnetic force that precisely attracts and fixes the steel ball 600 through the spherical groove 502. The spherical design ensures accurate centering of the steel ball 600. During testing, the annular electromagnet 501 is de-energized, releasing the steel ball 600. After falling freely, the steel ball 600 rebounds, and the rangefinder 505 monitors the trajectory of the steel ball 600 in real time through the ranging hole 503 and accurately measures the maximum rebound height. After the test is completed, the annular electromagnet 501 is re-energized and lowered to a low position. The spherical groove 502 then attracts the steel ball 600 again and raises it to the initial height, completing the automated testing cycle. This integrated design combines the attraction and release function with the precise ranging function. The lifting and lowering movement of the annular electromagnet 501 achieves the retrieval and resetting of the steel ball 600. At the same time, the coaxial design of the ranging hole 503 and the spherical groove 502 ensures an unobstructed measurement path, enabling the rangefinder 505 to obtain accurate measurement data.

[0025] like Figures 3-4 and Figure 7 As shown, the marking mechanism 800 includes an upper housing 802 with an air intake valve 801, a stamp 803, a piston 804, a negative pressure assembly 805, an L-shaped rod 806, a guide frame 807, a fixing ring 808, and a spring 809. The upper housing 802 is located above the lower housing 700 and is fixedly fitted onto the outside of the cylinder 400. The piston 804 is slidably disposed inside the upper housing 802. The guide frame 807 is symmetrically disposed on the outside of the cylinder 400. The stamp 803 is positioned... On the lower housing 700, two L-shaped rods 806 are symmetrically arranged on the outside of the stamp 803, and the top of the L-shaped rods 806 penetrates the top of the lower housing 700 and passes through the guide hole of the guide frame 807 to connect with the bottom of the piston 804. The fixing ring 808 is installed on the L-shaped rods 806, and the spring 809 is sleeved on the L-shaped rods 806, and the spring 809 is connected between the fixing ring 808 and the guide frame 807. The negative pressure assembly 805 is arranged on the top of the upper housing 802.

[0026] It should be noted that before the lower cover 700 contacts the plate body 100, the negative pressure component 805 is activated to generate negative pressure inside the upper cover 802. At this time, the air inlet valve 801 remains closed, and the negative pressure drives the piston 804 to move upward. The piston 804, through the L-shaped rod 806, lifts the stamp 803 upward and fully enters the lower cover 700, compressing the spring 809. At this time, the stamp 803 is detached from the plate surface and is in a standby state. When marking is required, the negative pressure component 805 stops working and the air inlet valve 801 opens. The internal pressure of the upper cover 802 returns to normal, and the compressed spring 809 releases its elastic force to push the fixing ring 808. Through the L-shaped rod 806, the piston 804 is pushed downward, so that the stamp 803 contacts the plate surface to complete the marking. After marking is completed, the negative pressure component 805 works again, generating negative pressure to lift the piston 804 and the stamp 803, making them detach from the plate surface in preparation for the next marking.

[0027] like Figure 6 As shown, the magnetic ranging component 500 also includes an annular horn 506 disposed at the bottom of the annular electromagnet 501. The annular horn 506 is smoothly disposed with the bottom end slot of the spherical groove 502, and the diameter of the annular horn 506 gradually increases from the direction away from the spherical groove 502.

[0028] It should be noted that during the recovery phase, when the annular electromagnet 501 descends and approaches the steel ball 600, the pilot cone structure of the annular horn 506 can contact and correct the position of the steel ball 600 in advance, ensuring that the steel ball 600 can be accurately guided into the spherical groove 502 and successfully adsorbed. This significantly improves the success rate and efficiency of steel ball 600 recovery and ensures the continuity and reliability of the detection process.

[0029] like Figure 4 and Figure 7 As shown, the stamp component 803 includes an annular shell 8031 ​​and a sponge body 8032. The annular shell 8031 ​​is a hollow structure with an open bottom. The sponge body 8032 is installed inside the annular shell 8031, and the lower part of the sponge body 8032 extends to the outside of the annular shell 8031. The end of the L-shaped bracket away from the piston 804 is connected to the outer wall of the annular shell 8031.

[0030] It should be noted that in this embodiment, the inner diameter of the annular shell 8031 ​​is equal to the inner diameter of the cylinder 400, and the annular shell 8031 ​​and the cylinder 400 are coaxially arranged. The annular shell 8031 ​​also facilitates the blocking of the falling steel ball 600, preventing it from rolling to the inner edge of the annular shell 8031. When the sponge 8032 is deformed by pressure, the marking liquid adsorbed inside is squeezed out evenly, forming a clear circular mark on the surface of the plate. After marking is completed, the L-shaped rod 806 moves upward, driving the annular shell 8031 ​​to lift. The sponge 8032 returns to its original shape under its own elasticity and completely separates from the surface of the plate.

[0031] like Figures 4-6 As shown, a sound pressure sensor 701 for detecting the impact sound of steel ball 600 and plate body 100 is installed on the lower surface of the top of the lower housing 700. A processor is also provided inside the lower housing 700, which is electrically connected to the sound pressure sensor 701 and the rangefinder 505 respectively. A controller 301 electrically connected to the processor is installed on the detection frame 300.

[0032] It should be noted that the sound pressure sensor 701 collects the sound signal generated when the steel ball 600 impacts the plate body 100 in real time. This signal, along with the rebound height data detected by the rangefinder 505, is synchronously transmitted to the processor inside the lower housing 700 for fusion analysis. The processor establishes a dual judgment mechanism by comparing the frequency characteristics of the sound signal with the numerical relationship of the rebound height. When the bond is firm, the impact sound is crisp and the rebound height is large; when there is a defect, the impact sound is dull and the rebound height is small. This multi-sensor data fusion processing effectively improves the accuracy of defect identification and anti-interference capability. The processor uploads the analysis results to the controller 301 on the inspection frame 300 in real time. The controller 301 comprehensively judges whether to trigger the marking mechanism 800 for marking, and simultaneously coordinates the lifting operation of the magnetic ranging component 500 and the translational movement of the inspection frame 300 to achieve precise control of the fully automated inspection process.

[0033] like Figures 4-5 and Figure 9 As shown, the negative pressure assembly 805 includes a vacuum pump 8051, an L-shaped pipe 8052, and a branch pipe 8054 with a valve 8053. The vacuum pump 8051 is installed on the top of the detection frame 300 near one end, and the air inlet of the vacuum pump 8051 is connected to the L-shaped pipe 8052. The end of the L-shaped pipe 8052 away from the vacuum pump 8051 is a closed structure. The upper housing 802 and the L-shaped pipe 8052 are connected through the branch pipe 8054, and the valve 8053 is installed on the branch pipe 8054.

[0034] It should be noted that when the stamp 803 needs to be lifted, the valve 8053 on the branch pipe 8054 is opened, connecting the inside of the upper cover 802 with the L-shaped pipe 8052. The negative pressure is transmitted to the inside of the upper cover 802 through the branch pipe 8054, driving the piston 804 to move upward. When marking is required, the valve 8053 is closed to cut off the negative pressure passage, and at the same time, the air inlet valve 801 is opened to restore the pressure inside the upper cover 802 to normal pressure. The spring 809 pushes the stamp 803 to complete the marking action.

[0035] like Figures 1-2 and Figure 8As shown, the testing platform 200 has symmetrically arranged transverse guide rails 201 on both sides near the top. A first electric slider 202, which can move along the transverse guide rails 201, is mounted on the transverse guide rails 201. A column 203 is mounted on the top of the first electric slider 202, and a U-shaped sleeve 204 is slidably fitted onto the column 203. A longitudinal guide rail 205 is installed between the two U-shaped sleeves 204, and a second electric slider 206, connected to the testing frame 300, is mounted on the longitudinal guide rail 205. The openings of the two U-shaped sleeves 204... The ends are connected to a U-shaped plate 2011. A first motor 207 is installed at the end of the U-shaped plate 2011. A rotating rod 208 is connected to the output end of the first motor 207. A groove is opened on the side of the column 203 near the U-shaped plate 2011, and a rack 209 is provided in the groove. A gear 2010 corresponding to the rack 209 is installed on the rotating rod 208. An opening is opened through the U-shaped plate 2011 for the gear 2010 to extend into, and the gear 2010 meshes with the rack 209.

[0036] It should be noted that the first electric slider 202 moves along the transverse guide rail 201 to realize the movement of the inspection frame 300 in the X-axis direction. The first motor 207 drives the gear 2010 on the rotating rod 208 to mesh with the rack 209 in the groove of the column 203, thereby driving the U-shaped sleeve 204 to move the inspection frame 300 precisely in the Z-axis direction along the column 203. The longitudinal guide rail 205 installed between the two U-shaped sleeves 204 moves the inspection frame 300 in the Y-axis direction through cooperation with the second electric slider 206. In this way, through the three-axis linkage of the first electric slider 202, the second electric slider 206 and the first motor 207, the inspection frame 300 can accurately reach any inspection position on the surface of the plate. The U-shaped plate 2011 connects the two U-shaped sleeves 204 into an integral structure to ensure the stability of movement. This design realizes the precise positioning and automated motion control of the inspection device in three-dimensional space, which greatly improves the inspection efficiency and positioning accuracy.

[0037] like Figure 3 and Figure 5 As shown, a lifting mechanism 900 for controlling the sliding of the annular electromagnet 501 is installed on the testing frame 300. The lifting mechanism 900 includes a second motor 901, a lead screw 902, a cross column 903, and a slide rod 904. The bottom end of the slide rod 904 is connected to the top end of the protective cover 504, and the top end of the slide rod 904 slides through the top of the cylinder 400 and is connected to the cross column 903. The second motor 901 is installed at the bottom of the testing frame 300. The bottom end of the lead screw 902 passes through the testing frame 300 and is connected to the output shaft of the second motor 901. The cross column 903 is threadedly connected to the lead screw 902.

[0038] It should be noted that the second motor 901 drives the lead screw 902 to rotate, and the rotational motion is converted into linear lifting motion through the horizontal column 903 which is threadedly connected to the lead screw 902. The horizontal column 903 drives the slide rod 904 connected to it to move in the vertical direction. The bottom end of the slide rod 904 is connected to the protective cover 504, thereby driving the entire magnetic distance measuring assembly 500 to rise and fall within the cylinder 400.

[0039] This invention provides a detection method for a sheet metal skin adhesion detection device, comprising the following steps: Step 1: Place the plate body 100 on the upper surface of the testing table 200, and adjust the height of the testing frame 300 so that it causes the lower shell cover 700 at the bottom of the cylinder 400 to fit against the upper surface of the plate body 100. Step 2: Control the magnetic ranging component 500 to cancel the attraction force on the steel ball 600, so that the steel ball 600 falls freely in the cylinder 400 and collides with the plate body 100. After the collision, the steel ball 600 rebounds. Use the magnetic ranging component 500 to detect the maximum height of the rebound of the steel ball 600. Step 3: Compare the maximum rebound height of the steel ball 600. If it does not reach the set height threshold, the linkage marking mechanism 800 will mark the corresponding upper surface of the plate body 100. Step 4: Control the magnetic ranging component 500 to descend and attract the falling steel ball 600. After attraction, rise and reset. Then adjust the position of the detection frame 300 so that the steel ball 600 corresponds to other undetected areas of the plate body 100. Repeat the previous operation to perform a comprehensive inspection of the plate body 100.

[0040] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for detecting the skin adhesion of a board, comprising a testing platform (200) on which a board body (100) is placed, characterized in that, Above the testing platform (200) is a lifting and sliding testing frame (300) that can be moved along its length and width. Multiple uniformly distributed cylinders (400) are embedded through the testing frame (300). A lifting magnetic ranging component (500) is movably installed inside the cylinder (400). A steel ball (600) is attracted below the magnetic ranging component (500). The magnetic ranging component (500) is used to detect the rebound height of the steel ball (600) after it falls onto the plate body (100). A lower shell (700) is connected to the cylinder (400) near the bottom. A marking mechanism (800) is installed between the lower shell (700) and the cylinder (400). When the maximum rebound height of the steel ball (600) detected by the magnetic ranging component (500) does not reach the set threshold, the marking mechanism (800) is used to mark the corresponding position on the plate body (100).

2. The sheet metal skin adhesion detection device according to claim 1, characterized in that, The magnetic ranging assembly (500) includes an annular electromagnet (501), a spherical groove (502), a ranging hole (503), a protective cover (504), and a rangefinder (505). The annular electromagnet (501) is slidably disposed inside the cylinder (400). The spherical groove (502) is opened at the bottom of the annular electromagnet (501) and corresponds to the steel ball (600). The ranging hole (503) penetrates the bottom of the spherical groove (502). The protective cover (504) is installed on the top of the annular electromagnet (501) and covers the ranging hole (503). The rangefinder (505) is installed on the lower surface of the top of the protective cover (504) and corresponds to the position of the ranging hole (503).

3. The sheet metal skin adhesion detection device according to claim 1, characterized in that, The marking mechanism (800) includes an upper shell cover (802) with an air inlet valve (801), a stamp (803), a piston (804), a negative pressure assembly (805), an L-shaped rod (806), a guide frame (807), a fixing ring (808), and a spring (809). The upper shell cover (802) is located above the lower shell cover (700) and is fixedly fitted on the outside of the cylinder (400). The piston (804) is slidably disposed inside the upper shell cover (802). The guide frame (807) is symmetrically disposed on the outside of the cylinder (400). The stamp (803) Located in the lower housing (700), two L-shaped rods (806) are symmetrically arranged on the outside of the stamp (803), and the top of the L-shaped rod (806) passes through the top of the lower housing (700) and through the guide hole of the guide frame (807) to connect with the bottom of the piston (804). The fixing ring (808) is installed on the L-shaped rod (806), and the spring (809) is sleeved on the L-shaped rod (806), and the spring (809) is connected between the fixing ring (808) and the guide frame (807). The negative pressure assembly (805) is located on the top of the upper housing (802).

4. The sheet metal skin adhesion detection device according to claim 2, characterized in that, The magnetic ranging component (500) also includes an annular horn (506) disposed at the bottom of the annular electromagnet (501). The annular horn (506) is smoothly disposed with the bottom end slot of the spherical groove (502), and the diameter of the annular horn (506) gradually increases from the direction away from the spherical groove (502).

5. The sheet metal skin adhesion detection device according to claim 3, characterized in that, The stamp component (803) includes an annular shell (8031) and a sponge (8032). The annular shell (8031) is a hollow structure with an open bottom. The sponge (8032) is installed inside the annular shell (8031), and the lower part of the sponge (8032) extends to the outside of the annular shell (8031). The end of the L-shaped bracket away from the piston (804) is connected to the outer wall of the annular shell (8031).

6. The sheet metal skin adhesion detection device according to claim 2, characterized in that, The lower top surface of the lower housing (700) is equipped with a sound pressure sensor (701) for detecting the impact sound of steel ball (600) and plate body (100). The lower housing (700) is also equipped with a processor that is electrically connected to the sound pressure sensor (701) and the rangefinder (505) respectively. The detection frame (300) is equipped with a controller (301) that is electrically connected to the processor.

7. The sheet metal skin adhesion detection device according to claim 3, characterized in that, The negative pressure assembly (805) includes a vacuum pump (8051), an L-shaped pipe (8052), and a branch pipe (8054) with a valve (8053). The vacuum pump (8051) is installed on the top of the detection frame (300) near one end, and the air inlet of the vacuum pump (8051) is connected to the L-shaped pipe (8052). The end of the L-shaped pipe (8052) away from the vacuum pump (8051) is a closed structure. The upper shell (802) and the L-shaped pipe (8052) are connected through the branch pipe (8054). The valve (8053) is installed on the branch pipe (8054).

8. The sheet metal skin adhesion detection device according to claim 1, characterized in that, The testing platform (200) has symmetrically arranged transverse guide rails (201) on both sides near the top. A first electric slider (202) that can move along the transverse guide rail (201) is installed on the transverse guide rail (201). A column (203) is installed on the top of the first electric slider (202). A U-shaped sleeve (204) is slidably fitted on the column (203). A longitudinal guide rail (205) is installed between the two U-shaped sleeves (204). A second electric slider (206) connected to the testing frame (300) is installed on the longitudinal guide rail (205). The open ends of the two U-shaped sleeves (204) are... A U-shaped plate (2011) is connected to the U-shaped plate (2011). A first motor (207) is installed at the end of the U-shaped plate (2011). A rotating rod (208) is connected to the output end of the first motor (207). A groove is opened on the side of the column (203) near the U-shaped plate (2011), and a rack (209) is provided in the groove. A gear (2010) corresponding to the rack (209) is installed on the rotating rod (208). An opening is opened through the U-shaped plate (2011) for the gear (2010) to extend into, and the gear (2010) meshes with the rack (209).

9. The sheet metal skin adhesion detection device according to claim 2, characterized in that, The testing frame (300) is equipped with a lifting mechanism (900) for controlling the sliding of the annular electromagnet (501). The lifting mechanism (900) includes a second motor (901), a lead screw (902), a cross column (903), and a slide rod (904). The bottom end of the slide rod (904) is connected to the top end of the protective cover (504), and the top end of the slide rod (904) slides through the top of the cylinder (400) and is connected to the cross column (903). The second motor (901) is installed at the bottom of the testing frame (300). The bottom end of the lead screw (902) passes through the testing frame (300) and is connected to the output shaft of the second motor (901). The cross column (903) is threadedly connected to the lead screw (902).

10. A detection method for a board skin adhesion detection device, applied to the board skin adhesion detection device according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Place the plate body (100) on the upper surface of the testing table (200), and adjust the height of the testing frame (300) so that it drives the lower shell cover (700) at the bottom of the cylinder (400) to fit against the upper surface of the plate body (100). Step 2: Control the magnetic ranging component (500) to cancel the attraction force on the steel ball (600), so that the steel ball (600) falls freely in the cylinder (400) and collides with the plate body (100). After the collision, the steel ball (600) rebounds. The maximum height of the rebound of the steel ball (600) is detected by the magnetic ranging component (500). Step 3: Compare the maximum rebound height of the steel ball (600). If it does not reach the set height threshold, the linkage marking mechanism (800) will mark the corresponding upper surface of the plate body (100). Step 4: Control the magnetic ranging component (500) to descend and attract the falling steel ball (600), and then rise and reset after attraction. Then adjust the position of the detection frame (300) so that the steel ball (600) corresponds to other undetected areas of the plate body (100). Repeat the previous operation to perform a comprehensive inspection of the plate body (100).

Images