A metal workpiece surface coating inspection apparatus

Abstract

The present application relates to the technical field of coating detection, in particular to a metal workpiece surface coating detection equipment, which comprises a crosscutting knife, a guide rail, a connecting beam, a sliding part, a supporting part, the crosscutting knife is arranged below the connecting beam, the connecting beam is arranged on the guide groove of the guide rail through the sliding part, the supporting part is arranged below the guide rail, a double-form fixing assembly is arranged on the inner side of the supporting part, the double-form fixing assembly is provided with a fixed block and a moving block to hold and position the metal workpiece, which facilitates the testing of the surface coating adhesion. The metal workpiece surface coating detection equipment realizes the self-adaptive positioning of the workpiece through the structure of the double-form fixing assembly, the fixed block and the moving block are compatible with the surfaces of workpieces of different shapes, are fixed through the convex edge and the arc-shaped edge, the moving block drives the L-shaped rod to move horizontally, the movable part is driven by the connecting rod mechanism to separate from the magnetic attraction positioning groove, so that the whole system reaches a dynamic balance state, and the automatic centering and stable fixing of the workpiece can be realized without external power.

Description

Technical Field

[0001] This invention relates to the field of coating inspection technology, specifically to a coating inspection device for metal workpiece surfaces. Background Technology

[0002] Accurate assessment of the adhesion of coatings on metal surfaces plays a crucial role in industrial quality control. Currently, the traditional testing method widely used in the industry mainly relies on technicians manually scratching the workpiece surface with a cross-cut adhesion tester. This approach has several inherent limitations.

[0003] The reliability of test results is largely dependent on individual differences among operators. Significant variations exist among different inspectors in terms of force uniformity, scribing speed control, and the accuracy of tool mark spacing, directly leading to a lack of stability and comparability in test data. Especially when dealing with workpieces with irregular geometries, manual operation makes it difficult to precisely maintain the perpendicular angle between the tool and the coating surface; angular deviations severely affect the quality and depth consistency of the scribing mesh.

[0004] Manually controlling the scratching force is also difficult to standardize. Insufficient force may result in the coating not being completely scratched through, failing to accurately reflect the adhesion; while excessive force risks scratching the metal substrate. Both situations will cause the final adhesion rating to deviate from reality. In addition, for workpieces with large size variations or production scenarios requiring batch inspection, repeated manual positioning and testing operations are not only time-consuming and labor-intensive, but operator fatigue can also introduce additional errors.

[0005] There are also significant shortcomings in the workpiece fixing process. Fixing specimens of different shapes usually requires the use of multiple auxiliary fixtures or relies entirely on manual support, which significantly increases the complexity of the operation. More importantly, during the scribing test, the workpiece may experience minute, imperceptible displacements. This instability can lead to deformation of the scribing pattern or inconsistent depth of the scratches, directly affecting the accuracy of the test results.

[0006] The combined effect of these factors makes it difficult for traditional testing methods to guarantee the repeatability and reliability of test data. The operational process is inefficient, and there are many human interference factors, making it difficult to meet the stringent requirements of high precision, high efficiency, and standardization demanded by modern industrial production for quality control. The limitations of traditional methods are particularly pronounced when facing diverse and large-scale testing needs.

[0007] Therefore, we propose a surface coating inspection device for metal workpieces. Summary of the Invention

[0008] One of the technical problems that this application aims to solve is that traditional manual testing methods rely on human operation, resulting in poor consistency and low efficiency.

[0009] To solve the above technical problems, this application provides a metal workpiece surface coating inspection device, including a cross-cut tester, a guide rail, a connecting beam, a sliding member, and a support member. The cross-cut tester is disposed below the connecting beam, the connecting beam is disposed on the guide groove of the guide rail through the sliding member, and the support member is disposed below the guide rail.

[0010] The inner side of the support component is provided with a dual-form fixing component, which includes a fixing block, a moving block, a limiting component, and a movable component. The fixing block is located on the inner side of the support component, the moving block is located inside the fixing block, the limiting component is located in the middle of the inner sides of the two support components, and the movable component is located above the limiting component.

[0011] When the metal workpiece is in a fixed state, the fixed block and the moving block work together to fix the metal workpiece, and the moving part leaves the positioning groove of the limiting part. When the metal workpiece is in a relaxed state, the fixed block and the moving block do not fix the metal workpiece, and the moving part falls back into the positioning groove of the limiting part.

[0012] In some embodiments, the connecting beam is composed of several detachable connecting blocks. One end face of the connecting block is provided with a connecting port, and the connecting port is provided with thread 2. The other end face of the connecting block is provided with a protruding connecting part, and the protruding connecting part is provided with thread 3. Thread 2 and thread 3 are sized to match.

[0013] In some embodiments, a connector is provided at the bottom of the middle connecting block of the connecting beam. The connector has only one thread inside, which is detachably connected to the tail of the cross-cutting tool through the thread.

[0014] In some embodiments, a guide groove is provided on the top surface of the guide rail, and sliding members are provided at both ends of the connecting beam. The cross-sectional dimensions of the sliding members match the guide groove, and the sliding members, like the connecting beam, change their length through a detachable structure.

[0015] In some embodiments, the fixed block is provided with a through hole for accommodating the movable block, the fixed block is provided with an arc-shaped edge, and the end face of the movable block is provided with an inner contact surface and a convex edge in sequence, the convex edge protruding beyond the arc-shaped edge from the inner contact surface.

[0016] In some embodiments, a space is provided within the support member, and a U-shaped rod is provided within the space. One end of the U-shaped rod is fixedly connected to the movable block, and the other end of the U-shaped rod is fixedly connected to the connecting rod. The U-shaped rod can move horizontally within the space.

[0017] In some embodiments, a side plate is provided on both sides of the movable member, and the side plate is hinged to the outer side of the connecting rod.

[0018] In some embodiments, the other end of the connecting rod is hinged to the second side plate, and the second side plate is fixedly disposed on the end side of the connecting rod.

[0019] In some embodiments, a limiting member is provided at the bottom of the movable part, and the two ends of the limiting member are located inside the support member and below the connecting rod. The connecting rod, the limiting member, and the connecting beam are similar in that their lengths can be changed through a threaded detachable structure.

[0020] In some embodiments, a positioning groove is provided on the limiting member at the bottom of the movable member to accommodate the bottom cross section of the movable member, and a magnet that can attract the bottom of the movable member is provided in the positioning groove.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. The overall length can be flexibly adjusted through the detachable connecting beam structure. The connecting blocks are connected by threaded engagement. Users can freely assemble the connecting beam of the required length according to the actual size of the workpiece to be tested. The modular design significantly improves the adaptability of the equipment to workpieces of different specifications, while also facilitating transportation and storage. The cross-cut tool and the connecting beam are also connected by a detachable thread, which facilitates tool replacement and maintenance.

[0023] 2. The cooperative design of the sliding component and the guide rail groove enables the cross-cutting cutter to move smoothly along the predetermined trajectory. The sliding component itself also has a length adjustment function, which further enhances the equipment's adaptability to changes in workpiece size. The guiding structure ensures the movement stability of the cross-cutting cutter during the marking process, providing mechanical assurance for the repeatability of test results.

[0024] 3. The adaptive positioning of the workpiece is achieved by setting a dual-form fixing component structure. The operation of the fixed block and the moving block is compatible with workpiece surfaces of different shapes, including flat surfaces, curved surfaces and round tubes. When the workpiece contacts the inner contact surface, it is effectively fixed by the cooperation of the convex edge and the arc edge. After the moving block is subjected to force, it drives the return rod to move horizontally, and then drives the movable part to disengage from the magnetic positioning groove through the linkage mechanism, so that the whole system reaches a dynamic balance state and can achieve automatic centering and stable fixing of the workpiece without external power.

[0025] 4. The internal space design of the support component provides a horizontal track for the U-shaped rod, ensuring the stability of the fixed force transmission. The connecting rod and limiting component also adopt an adjustable length design, working in conjunction with the length adjustment function of the connecting beam, enabling the equipment to match various workpieces from narrow flat plates to large-diameter pipes. The magnetic positioning structure can reliably fix the moving parts in the non-working state, preventing the parts from shaking; when the workpiece is loaded, it can automatically unlock, simplifying the operation process.

[0026] 5. The equipment improves the efficiency and reliability of coating adhesion testing. Operators only need to quickly assemble the corresponding length of the parts according to the workpiece size, push the workpiece into the fixed area to trigger automatic positioning, and after the cross-cutting tool completes precise engraving under the guidance of the guide rail, the fixing system automatically resets when the workpiece is taken out. The whole process does not require complicated fixture adjustment or positioning calibration, and is especially suitable for continuous testing scenarios of workpieces of different shapes and sizes, effectively reducing the difficulty of operation and time cost. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a top view of the overall structure of the present invention;

[0030] Figure 4 for Figure 3 Cross-sectional view of the middle section (BB);

[0031] Figure 5 for Figure 3 Enlarged view at point C;

[0032] Figure 6 This is a schematic diagram of the cross-section cutter and connecting beam structure;

[0033] Figure 7 for Figure 6 Cross-sectional view of DD in the middle;

[0034] Figure 8 This is a schematic diagram of the connecting beams;

[0035] Figure 9 This is a schematic diagram of the inspection structure for a flat metal workpiece;

[0036] Figure 10 for Figure 9 Enlarged view at point E in the middle;

[0037] Figure 11 This is a schematic diagram of the inspection structure for curved metal workpieces;

[0038] Figure 12 for Figure 11 Enlarged view at point F;

[0039] Figure 13 This is a schematic diagram of the inspection structure for a cylindrical metal workpiece.

[0040] Figure 14 for Figure 13 Enlarged view at point G;

[0041] Figure 15This is a schematic diagram of the foldable connection structure of the guide rail;

[0042] Figure 16 Schematic diagram of the threaded detachable connection method of the guide rail

[0043] Figure 17 This is a schematic diagram of the support structure.

[0044] In the diagram, 100-guide rail; 101-guide groove; 102-connecting pair one; 103-connecting pair two; 104-arc section; 105-coupling shaft; 106-connecting fixing cap; 107-protruding connecting part; 108-connecting hole; 200-connecting beam; 2000-connecting block; 201-connecting part; 2011-thread one; 202-connecting port; 2021-thread two; 203-protruding connecting part; 2031-thread three; 300-sliding part; 400-supporting part; 500-double-shaped Fixed component; 5000-Fixed block; 5001-Arc edge; 501-Moving block; 5011-Inner contact surface; 5012-Protruding edge; 502-Connecting rod; 503-Limiting component; 5031-Positioning groove; 5032-Magnet; 504-Moving component; 505-Side plate one; 506-Side plate two; 507-Connecting rod; 508-Through hole; 509-U-shaped rod; 510-Space; 600-Cross-cutting tool; 700-Flat plate workpiece; 800-Curved surface workpiece; 900-Round tube workpiece. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1, see Figure 1-17 The present invention provides a technical solution: a metal workpiece surface coating inspection device, including a cross-cutting cutter 600, a guide rail 100, a connecting beam 200, a sliding member 300, and a support member 400. The cross-cutting cutter 600 is disposed below the connecting beam 200. The connecting beam 200 is disposed on the guide groove 101 of the guide rail 100 through the sliding member 300. The support member 400 is disposed below the guide rail 100.

[0047] A dual-form fixing component 500 is provided on the inner side of the support member 400. The dual-form fixing component 500 is provided with a fixing block 5000, a moving block 501, a limiting member 503, and a movable member 504. The fixing block 5000 is provided on the inner side of the support member 400, the moving block 501 is provided inside the fixing block 5000, the limiting member 503 is provided in the middle of the inner sides of the two support members 400, and the movable member 504 is provided above the limiting member 503.

[0048] When the metal workpiece is fixed, the fixed block 5000 and the movable block 501 work together to fix the metal workpiece, and the movable part 504 leaves the positioning groove 5031 of the limiting part 503. When the metal workpiece is relaxed, the fixed block 5000 and the movable block 501 do not fix the metal workpiece, and the movable part 504 falls back into the positioning groove 5031 of the limiting part 503.

[0049] Specifically, the equipment's structural design is based on the principles of mechanical linkage and modular combination. The guide rail 100 provides a basic support platform for the entire system, and its top guide groove 101 forms a precise fit with the sliding component 300. This guiding structure ensures that the cross-cutting cutter 600 maintains a stable movement trajectory during movement, effectively eliminating the angular deviation problem commonly encountered during manual operation. The connecting beam 200 adopts a split design, with multiple connecting blocks 2000 achieving length adjustment through the engagement of thread two 2021 and thread three 2031. This modular structure allows the equipment to adapt to the inspection needs of workpieces of different sizes, while also facilitating disassembly, transportation, and storage.

[0050] The cross-cutting tool 600 is detachably connected to the connector 201 via thread 2011, enabling quick tool changes. The sliding component 300 also has a length adjustment function, working in conjunction with the length changes of the connecting beam 200 to ensure stable guiding performance across different spans. The support component 400 serves as the basic load-bearing structure, and its inner dual-mode fixing assembly 500 employs a mechanical self-balancing principle. When the workpiece contacts the inner contact surface 5011 of the moving block 501, external force pushes the moving block 501 to a horizontal displacement, which in turn moves the connecting rod 502 via the return rod 509. This movement is converted into the vertical lifting motion of the movable component 504 through the hinge mechanism between the connecting rod 507 and the first and second side plates 505 and 506.

[0051] The unique structure of the dual-form fixing component 500 allows it to adapt to workpieces of different shapes. Flat workpieces 700 are positioned via the gap formed by the inner contact surface 5011 and the convex edge 5012; curved workpieces 800 achieve curved surface contact through the inner contact surface 5011; and round tube workpieces 900 are fixed by an envelope formed by the convex edge 5012 and the arc-shaped edge 5001. This multi-form adaptability significantly reduces the frequent fixture changes required in traditional inspection processes. The magnet 5032 at the bottom of the movable component 504 provides magnetic fixation in the non-working state and automatically unlocks during operation via mechanical linkage, simplifying the operation process.

[0052] The overall structure, through an adjustable-length connecting beam 200, sliding member 300, connecting rod 502, and limiting member 503, forms a size adjustment system, enabling a single device to cover inspection needs ranging from narrow flat plates to large-diameter pipes. The cross-cutting tool 600, guided by the guide rail 100, along with a self-balancing fixing system, ensures that the workpiece and tool maintain a stable relative position during the marking process. This design, while ensuring testing accuracy, significantly reduces reliance on operator skill, improving inspection efficiency and result repeatability.

[0053] Example 2, see Figure 1-17 The connecting beam 200 is composed of several detachable connecting blocks 2000. One end face of the connecting block 2000 is provided with a connecting port 202, and a thread 2021 is provided inside the connecting port 202. The other end face of the connecting block 2000 is provided with a protruding connecting part 203, and a thread 3 2031 is provided on the protruding connecting part 203. The dimensions of the thread 2021 and the thread 3 2031 are matched.

[0054] The bottom of the intermediate connecting block 2000 of the connecting beam 200 is provided with a connector 201. The connector 201 has a thread 2011 inside, which is detachably connected to the tail of the cross-cutting tool 600 through the thread 2011.

[0055] Specifically, the connecting beam 200 adopts a modular split structure design, consisting of multiple detachable connecting blocks 2000. Each connecting block 2000 has standardized interfaces at both ends: one end is a connecting port 202 with thread 2021, and the other end is a protruding connecting part 203 with thread 3031. This symmetrical threaded interface design allows any two connecting blocks 2000 to be quickly assembled through threaded engagement. A connecting piece 201 with thread 1 2011 is added to the bottom of the connecting block 2000 in the middle position, forming a standardized tool interface with the tail of the cross-cutting tool 600.

[0056] This structure achieves three core functions. First, the total length of the connecting beam 200 can be freely adjusted by increasing or decreasing the number of connecting blocks 2000, allowing the equipment to adapt to the inspection needs of workpieces of different sizes. Second, the detachable connection design between the thread-2011 and the cross-cutting tool 600 facilitates tool replacement and maintenance; when the tool tip wears, it can be disassembled and replaced individually. Third, the modular design significantly improves the efficiency of equipment transportation and storage; the disassembled connecting blocks 2000 can be compactly stored.

[0057] The dimensional matching of thread 2021 and thread 3031 ensures complete interchangeability of all connecting blocks 2000. Operators do not need to distinguish between specific blocks; any two blocks can be reliably connected through thread engagement. This standardized interface design reduces assembly complexity and avoids the part mismatch problems common in traditional customized equipment. Thread 2011 of connector 201 also adopts a standardized specification, ensuring compatibility with the same specification cross-cutting tool 600.

[0058] The overall structure achieves a rigid connection through mechanical threads, providing flexible dimensional adjustment capabilities while ensuring structural strength. Compared to a monolithic beam structure, this design solves the equipment size limitations for large-span testing and avoids the high cost of customizing equipment for workpieces of different sizes. The reliability of the threaded connection ensures that the connecting beam 200 will not shift or wobble during testing, providing a stable support foundation for the cross-cutting tool 600.

[0059] Example 3, see Figures 1-17 The guide groove 101 is set on the top surface of the guide rail 100. The two ends of the connecting beam 200 are provided with sliding members 300. The cross-sectional dimensions of the sliding member 300 match those of the guide groove 101. Like the connecting beam 200, the sliding member 300 changes its length through a detachable structure.

[0060] Specifically, the guide groove 101 on the top surface of the guide rail 100 forms a precise fit with the slider 300, and the cross-sectional profile of the slider 300 matches the inner cavity size of the guide groove 101. This geometric constraint ensures that the slider 300 can only move horizontally along the path defined by the guide groove 101. The sliders 300 fixedly installed at both ends of the connecting beam 200 constitute a double-point support structure, providing a stable guiding foundation for the entire motion system.

[0061] The sliding member 300 has its own length adjustment function, which is consistent with the modular design of the connecting beam 200. When the overall length of the connecting beam 200 is changed by adding or removing connecting blocks 2000, the sliding member 300 can be adjusted accordingly. This linkage adjustment mechanism ensures that no matter what length the connecting beam 200 is in, the sliding members 300 at both ends can always maintain full contact with the guide groove 101, avoiding local suspension or poor contact.

[0062] The guide groove 101 precisely controls the motion freedom of the slider 300, retaining only the translational degree of freedom along the length of the guide rail 100. This constraint effectively eliminates any lateral offset or angular deflection that may occur during the marking process of the cross-cutting tool 600, ensuring that the tool tip's movement trajectory remains linear. The fit clearance between the slider 300 and the guide groove 101 is optimized to ensure smooth sliding without significant wobbling.

[0063] The detachable design of the sliding component 300 allows it to be adaptively adjusted according to the actual length of the connecting beam 200. When inspecting narrower workpieces, a shorter sliding component 300 can be used; when dealing with wider workpieces, a longer sliding component 300 can be assembled. This dimensional matching relationship maintains the structural rigidity of the equipment under different working conditions and prevents the middle of the connecting beam 200 from deflecting due to excessive support span.

[0064] This guiding system replaces manual control with physical constraints, solving the problem of unstable angle maintenance of the cross-cutting cutter 600 during manual operation. The symmetrical layout of the dual sliding parts 300 provides balanced load-bearing capacity, ensuring that the cross-cutting cutter 600 remains perpendicular to the workpiece surface during the marking process. The straightness accuracy of the guide groove 101 directly determines the quality of the marking grid; this mechanical guiding method eliminates the dependence of operator manual control on the uniformity of the tool mark spacing.

[0065] Example 4, see Figures 1-17 The fixed block 5000 is provided with a through hole 508 for accommodating the movable block 501. The fixed block 5000 is provided with an arc-shaped edge 5001. The end face of the movable block 501 is provided with an inner contact surface 5011 and a convex edge 5012 in sequence. The convex edge 5012 protrudes beyond the arc-shaped edge 5001 compared to the inner contact surface 5011.

[0066] The support component 400 adopts a hollow design and has a space 510 inside. A loop rod 509 is installed in the space 510. One end of the loop rod 509 is fixedly connected to the moving block 501, and the other end of the loop rod 509 is fixedly connected to the connecting rod 502. The loop rod 509 can move horizontally within the space 510.

[0067] The movable component 504 has side plates 505 on both sides, which are hinged to the outer side of the connecting rod 507. The other end of the connecting rod 507 is hinged to side plate 506, which is fixedly mounted on the end of the connecting rod 502.

[0068] Specifically, the structural design of the dual-form fixing component 500 is based on the principles of lever transmission and self-balancing. The fixing block 5000 serves as the overall base, and its through hole 508 provides a horizontal moving track for the moving block 501. The end of the moving block 501 is designed with a stepped structure including an inner contact surface 5011 and a convex edge 5012. The convex edge 5012 extends outward relative to the arc-shaped edge 5001 to form a cantilevered support surface. This geometric feature forms a dual-level positioning reference surface.

[0069] The loop rod 509 forms a horizontal force transmission mechanism within the space 510 of the support member 400. When the workpiece contacts the inner contact surface 5011 or the protruding edge 5012 of the moving block 501, an external force pushes the moving block 501 to move horizontally. This movement is synchronously transmitted to the connecting rod 502 via the loop rod 509. The displacement of the connecting rod 502 is transmitted to the hinged connecting rod 507 via the side plate 506.

[0070] Link 507 forms the core conversion mechanism. Its two ends are connected to side plate 1 505 and side plate 2 506 respectively via rotating joints. When link 502 moves horizontally, it causes side plate 2 506 to move synchronously. Under the constraint of side plate 1 505, link 507 generates a lever effect, converting the horizontal movement of link 502 into the vertical lifting movement of movable part 504. In the non-working state, magnet 5032 at the bottom of movable part 504 is attracted to limiting part 503, forming a self-locking state.

[0071] The purpose of this design is threefold: First, the inner contact surface 5011 of the moving block 501 is suitable for positioning flat workpieces 700 and curved workpieces 800, while the gap formed by the convex edge 5012 is specifically used for axial positioning of the round tube workpiece 900. Horizontal displacement transmission can be triggered when different workpieces contact different positions. Second, the vertical lifting of the movable part 504 can adapt to changes in workpiece height, ensuring that workpieces of different thicknesses can be stably attached to the support surface. Third, the self-adhesive property of the magnet 5032 keeps the mechanism reset in the non-test state and automatically unlocks during testing via mechanical linkage.

[0072] The dual-mode fixing component 500 achieves three-point adaptive balance through the aforementioned mechanical linkage. When the workpiece contacts the moving block 501 and generates initial displacement, this displacement is transmitted through the path of the loop rod 509-connecting rod 502-linking rod 507, synchronously driving the movable part 504 to adjust the support height. The entire process requires no additional operation steps; the workpiece placement automatically triggers the fixing and positioning. This self-balancing characteristic effectively solves the problem of repeated adjustments required by traditional manual fixtures, especially improving the inspection efficiency of irregular workpieces.

[0073] Example 5, see Figures 1-17 The bottom of the movable part 504 is provided with a limiting part 503. The two ends of the limiting part 503 are located inside the support part 400 and below the connecting rod 502. The connecting rod 502, the limiting part 503 and the connecting beam 200 are able to change their length through a threaded detachable structure.

[0074] The bottom of the movable part 504 is provided with a positioning groove 5031 that can accommodate the bottom section of the movable part 504, and a magnet 5032 that can attract the bottom of the movable part 504 is provided in the positioning groove 5031.

[0075] Specifically, the limiting member 503 in the dual-form fixing assembly 500 serves as the positioning base mechanism for the movable member 504. Both ends of the limiting member 503 are fixed to the inner wall of the support member 400, located directly below the connecting rod 502, forming a stable lateral support frame. The positioning groove 5031 on the top surface of the limiting member 503 precisely matches the bottom cross-sectional profile of the movable member 504, providing reliable geometric constraints. The magnet 5032 embedded inside the positioning groove 5031 provides auxiliary fixing force, maintaining the initial position of the movable member 504 in the non-working state.

[0076] The engagement between the bottom of the movable part 504 and the positioning groove 5031 provides a dual positioning function. Geometric constraints ensure that the movable part 504 can only move in the vertical direction, preventing offset or wobbling. The attraction force generated by the magnet 5032 maintains the stability of the movable part 504 in the non-working state, preventing accidental displacement during transportation or idleness. When the workpiece contacts the moving block 501 and triggers the mechanical linkage, the driving force required for the lifting and lowering of the movable part 504 can easily overcome the magnetic attraction force, achieving smooth vertical movement.

[0077] Both the connecting rod 502 and the limiting member 503 adopt a threaded, detachable structure consistent with the connecting beam 200. This standardized design enables the entire fixing system to be dimensionally adjustable. When dealing with workpieces of different sizes, the lengths of the connecting rod 502 and the limiting member 503 can be adjusted simultaneously to ensure that the mechanical linkage range of the dual-mode fixing assembly 500 matches the workpiece size. The change in the length of the connecting rod 502 corresponds to the stroke range of the moving block 501, while the change in the length of the limiting member 503 ensures that the positioning groove 5031 is always below the movement trajectory of the moving member 504.

[0078] The purpose of this design is threefold: first, the magnet 5032 maintains the mechanism's reset state when not in operation, simplifying the operation process; second, the mechanical driving force generated when the workpiece is placed automatically releases the magnetic lock, eliminating the need for additional unlocking operations; and third, the geometric constraints of the positioning groove 5031 ensure the perpendicularity of the moving part 504's trajectory, preventing jamming or skew. This design significantly improves the positioning accuracy and repeatability of workpiece fixation.

[0079] The adjustable length mechanism ensures the equipment adapts to different size requirements; the shorter configuration is suitable for inspecting small workpieces, while the longer configuration meets the needs of large workpieces. All adjustments are achieved through standardized threaded connections, eliminating the need for customized fittings. The length change of the limiting component 503 is synchronized with the adjustment of the connecting rod 502, maintaining the stability of the entire force transmission mechanism. This dimensional adaptability fundamentally solves the problem of repetitive positioning caused by changes in workpiece size in traditional inspection methods.

[0080] Example 6, as Figure 15As shown, the guide rail 100 adopts a foldable connection method. An arc 104 is provided at the docking position of the two guide rails 100. Connecting pair 102 and connecting pair 2 103 are respectively provided on the arc 104. Connecting pair 102 is located at both ends of the arc 104, and connecting pair 2 103 is located in the middle of the arc 104. The connecting shaft 105 passes through the connecting pair 102 and connecting pair 2 103 and is fixed by the connecting fixing cap 106, so that the guide rail 100 can rotate along the connecting shaft 105 and fold together. It is simple and convenient. The folded guide rail 100 does not take up space, is lightweight and portable, and can be applied to a variety of scenarios.

[0081] Example 7, as Figure 16 As shown, the guide rail 100 can also be connected by a protruding connecting part 107 and a connecting hole 108. The protruding connecting part 107 and the connecting hole 108 are respectively provided with external and internal threads that mesh with each other. This connection method is convenient and detachable, and the length of the guide rail 100 can be adjusted to be suitable for testing the adhesion of coatings on the surface of metal workpieces of different sizes.

[0082] The following is combined with Figures 1-17 The working process of this equipment is as follows: First, assemble the connecting beam 200. Rotate and engage the thread 2021 of the connecting port 202 with the thread 2031 of the protruding connecting part 203. Rotate and engage the tail of the cross-cutting cutter 600 with the thread 2011 of the connecting part 201. Connect the sliding part 300 to the connecting beam 200. The length of the connecting beam 200 and the length of the sliding part 300 can be adjusted according to the size of the workpiece. Place the assembled connecting beam 200, sliding part 300, and cross-cutting cutter 600 into the guide groove 101 of the guide rail 100. The length of the limiting part 503 and the connecting rod 502 can also be adjusted according to the size of the workpiece.

[0083] When the equipment is not in operation, the movable part 504 is located in the positioning groove 5031, and the bottom of the movable part 504 is attracted by the magnet 5032. When it is necessary to inspect a metal workpiece, the flat workpiece 700 is passed along the length of the guide rail 100 through the gap between the protruding edge 5012 and the inner contact surface 5011 of the moving block 501. The side of the flat workpiece 700 is inserted into the gap between the inner contact surface 5011 and the protruding edge 5012. At this time, the side of the flat workpiece 700 will press the inner contact surface 5011 of the moving block 501 outward, causing the inner contact surface 5011 to move outward, thereby causing the loop rod 509 to move outward. The connecting rod 502 moves outward within space 510, causing it to move outward along with the loop rod 509. This, in turn, causes the second side plate 506 to move outward along with the connecting rod 502, resulting in the outer end of the connecting rod 507 moving outward along with the second side plate 506. The inner side of the connecting rod 507 rotates clockwise along the first side plate 505, causing the movable part 504 to overcome the attraction between the magnet 5032 and the bottom of the movable part 504, rising out of the positioning groove 5031 and reaching a balanced state. At this time, the connecting beam 200 is pushed, causing the tip of the cross-cutting tool 600 to scratch the surface coating of the flat workpiece 700. When the inspection is finished, the flat workpiece 700 is removed. The moving block 501 will fall back into the positioning groove 5031 due to the attraction of the movable part 504 by the magnet 5032 and the absence of the obstruction from the side of the flat workpiece 700, moving inward to its original position. The specific process is the reverse of the above process and will not be described again.

[0084] When testing the coating adhesion of a curved workpiece 800, the side of the curved workpiece 800 needs to be pressed against the inner contact surface 5011. The rest of the process is the same as that of the flat workpiece 700, and will not be repeated here. When testing the coating adhesion of a round tube workpiece 900, the lengths of the connecting beam 200, the sliding part 300, the connecting rod 502, and the limiting part 503 need to be adjusted. The outer side of the round tube workpiece 900 is pressed against the convex edge 5012, and the moving block 501 is pressed outward. The arc edge 5001 is in contact with the outer surface of the round tube workpiece 900. The subsequent process is the same as that of the flat workpiece 700 and the curved workpiece 800, and will not be repeated here.

[0085] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0086] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A metal workpiece surface coating inspection device, comprising a cross-cutting tool (600), characterized in that: It also includes a guide rail (100), a connecting beam (200), a sliding member (300), and a support member (400). The cross-cutting tool (600) is disposed below the connecting beam (200). The connecting beam (200) is disposed on the guide groove (101) of the guide rail (100) through the sliding member (300). The support member (400) is disposed below the guide rail (100). The support member (400) is provided with a dual-form fixing component (500) on its inner side. The dual-form fixing component (500) is provided with a fixing block (5000), a moving block (501), a limiting member (503), and a movable member (504). The fixing block (5000) is provided on the inner side of the support member (400), the moving block (501) is provided inside the fixing block (5000), the limiting member (503) is provided in the middle of the inner sides of the two support members (400), and the movable member (504) is provided above the limiting member (503). The fixed block (5000) is provided with a through hole (508) for accommodating the movable block (501). The fixed block (5000) is provided with an arc-shaped edge (5001). The end face of the movable block (501) is provided with an inner contact surface (5011) and a protruding edge (5012) in sequence. The protruding edge (5012) protrudes beyond the arc-shaped edge (5001) than the inner contact surface (5011). The support member (400) has a space (510) inside, and a loop rod (509) is provided in the space (510). One end of the loop rod (509) is fixedly connected to the moving block (501), and the other end of the loop rod (509) is fixedly connected to the connecting rod (502). The loop rod (509) can move horizontally in the space (510). The movable part (504) is provided with side plates (505) on both sides, and the side plates (505) are hinged to the outer side of the connecting rod (507). The other end of the connecting rod (507) is hinged to the second side plate (506), and the second side plate (506) is fixedly disposed on the end side of the connecting rod (502); When the metal workpiece is fixed, the fixing block (5000) and the moving block (501) cooperate to fix the metal workpiece, and the movable part (504) leaves the positioning groove (5031) of the limiting part (503). When the metal workpiece is relaxed, the fixing block (5000) and the moving block (501) do not fix the metal workpiece, and the movable part (504) falls back into the positioning groove (5031) of the limiting part (503).

2. The metal workpiece surface coating inspection device according to claim 1, characterized in that: The connecting beam (200) is composed of several detachable connecting blocks (2000). One end face of the connecting block (2000) is provided with a connecting port (202), and a threaded second (2021) is provided in the connecting port (202). The other end face of the connecting block (2000) is provided with a protruding connecting part (203), and a threaded third (2031) is provided on the protruding connecting part (203). The threaded second (2021) and the threaded third (2031) are sized to match.

3. The metal workpiece surface coating inspection device according to claim 2, characterized in that: A connector (201) is provided at the bottom of the middle connecting block (2000) of the connecting beam (200). The connector (201) has a thread (2011) inside, and is detachably connected to the tail of the cross-cutting tool (600) through the thread (2011).

4. The metal workpiece surface coating inspection device according to claim 3, characterized in that: The guide groove (101) is provided on the top surface of the guide rail (100), and the two ends of the connecting beam (200) are provided with sliding members (300). The cross-sectional dimensions of the sliding member (300) match those of the guide groove (101). The sliding member (300), like the connecting beam (200), changes its length through a detachable structure.

5. The metal workpiece surface coating inspection device according to claim 1, characterized in that: The bottom of the movable part (504) is provided with a limiting part (503). The two ends of the limiting part (503) are located inside the support (400) and below the connecting rod (502). The connecting rod (502), the limiting part (503), and the connecting beam (200) change their length through a threaded detachable structure.

6. The metal workpiece surface coating inspection device according to claim 5, characterized in that: The bottom of the movable part (504) is provided with a positioning groove (5031) that can accommodate the bottom cross section of the movable part (504), and a magnet (5032) that can attract the bottom of the movable part (504) is provided in the positioning groove (5031).

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