A double-sided paint spraying device for metal materials

Abstract

This application belongs to the field of spraying line technology, specifically disclosing a double-sided paint spraying device for metal materials, including: two symmetrically arranged spraying mechanisms; an angle adjustment track is provided on a section of the annular conveyor track between the two spraying mechanisms, the number of folded sections of the angle adjustment track being the same as the number of flat parts of the cold-rolled folded plate to be sprayed; a sliding column is slidably arranged on the annular conveyor track, the circumference of the adjusting gear is m, the supplementary angle between two adjacent flat parts is α, and the length of the adjusting rack at the junction of two adjacent flat parts and the corner of the corresponding folded section on the adjusting track is ma / 360°; a limiting frame is reciprocatingly slidably arranged above the annular conveyor track; the limiting frame elastically clamps the top of the sliding column to limit the rotation of the sliding column when the adjusting gear and the adjusting rack are not engaged. Under the action of the adjusting rack and the adjusting gear, the originally inclined flat part rotates to a state perpendicular to the spraying direction of the spray gun of the spraying mechanism, ensuring vertical spraying.

Description

Technical Field

[0001] This application relates to the field of spray coating line technology, and in particular to a double-sided paint spraying device for metal materials. Background Technology

[0002] In the field of spraying, the suspended conveyor spraying process has become the mainstream application solution in the industry due to its advantages such as continuous operation, high degree of automation, and adaptability to mass production. For example, the automatic spraying device for metal sheet products disclosed in CN120243321A and the spraying device and process for metal sheet for machinery manufacturing disclosed in CN120286244B both adopt the above-mentioned process. This process uses a suspended conveyor frame to suspend and fix the product to be sprayed, so that the product passes through the fixed spraying area along the preset conveying path. The spraying devices on both sides of the sheet are started simultaneously to achieve the coating of paint on the surface of the sheet, which effectively improves production efficiency and reduces manual intervention costs. It is widely used in the processing of cold-rolled folded sheets for building decoration, equipment shells, and transportation parts.

[0003] There is a product that is a cold-rolled folded sheet (also known as a cold-rolled bent sheet), see Figure 1 As shown, cold-rolled folded sheets, to meet structural strength or assembly requirements, typically have an outline composed of multiple alternating vertical and inclined surfaces. This unique folded structure leads to significant technical defects in existing suspended conveyor spraying processes: existing spraying devices often have spray guns with fixed angles or only allow for simple adjustments in a single direction, failing to dynamically adapt to the inclination angle of the folded sheet's inclined surfaces. When the sheet passes through the spraying area, the spray gun can only achieve approximately vertical spraying on the vertical surfaces. However, for the inclined surfaces, the spray gun's path always forms an angle with the inclined sheet surface, failing to meet the process requirements for vertical spraying. This directly results in uneven paint layer thickness and weak paint adhesion in the inclined areas, easily leading to defects such as runs, missed sprays, and pinholes. Consequently, the overall spraying quality of the sheet is inconsistent, severely affecting product appearance and corrosion resistance, and failing to meet the precision requirements of high-end applications for cold-rolled folded sheet spraying. Summary of the Invention

[0004] The purpose of this application is to provide a double-sided paint spraying device for metal materials to solve the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] A double-sided paint spraying device for metal materials, comprising:

[0007] Two symmetrically arranged spraying mechanisms;

[0008] A circular conveying track is provided, and an angle adjustment track is provided between two of the spraying mechanisms. The number of folded sections of the angle adjustment track is the same as the number of flat sections of the cold-rolled folded plate to be sprayed.

[0009] A sliding column is slidably disposed on the annular conveying track, and an adjusting gear is provided on the sliding column;

[0010] The adjusting rack is located at the bend of two adjacent folded sections of the angle adjusting track;

[0011] The circumference of the adjusting gear is m, the supplementary angle between two adjacent planar parts is a, and the length of the adjusting rack at the corner of the folded section on the adjusting track at the junction of two adjacent planar parts is ma / 360°.

[0012] A limiting frame is reciprocatingly slidably disposed above the annular conveying track; the limiting frame elastically clamps the top of the sliding column to limit the rotation of the sliding column when the adjusting gear and the adjusting rack are not engaged.

[0013] Furthermore, the spraying mechanism includes a movable frame, a lifting frame, and a spraying frame. The moving direction of the movable frame is consistent with the parallel direction of the two spraying mechanisms. The lifting frame is raised and lowered on the movable frame, and the spraying frame is mounted on the lifting frame.

[0014] Furthermore, the spraying frame includes an adjusting rod, an adjusting slide rail, a sliding rod, and several spray guns. The several spray guns are sleeved on the sliding rod in the vertical direction. Except for the spray gun in the very center which is fixed, the other spray guns are slidably disposed with the sliding rod.

[0015] Each of the two spray guns is provided with a sliding ring on the adjusting rod, and the sliding ring is hinged to the two corresponding spray guns respectively through a connecting rod.

[0016] The number of the adjusting slide rails is two, and the two adjusting slide rails are vertically connected to the lifting frame. The two ends of the adjusting rod are slidably disposed on the two adjusting slide rails respectively, and the two ends of the sliding rod are respectively connected to the two adjusting slide rails.

[0017] Furthermore, the annular conveying track includes an inner track and an outer track, both of which have L-shaped cross-sections. The openings of the two inner and outer tracks face each other, and the inner and outer tracks are hoisted into place.

[0018] Furthermore, the sliding column is provided with a sliding disk, and the bottom of the sliding disk is provided with several omnidirectional balls, which are rolledly connected to the bottom walls of the inner ring track and the outer ring track.

[0019] Furthermore, the adjusting gear is fixedly mounted on the sliding column, and the adjusting gear is located below the annular conveying track;

[0020] The lower end of the sliding column is rotatably connected to the drive chain.

[0021] Furthermore, the adjusting rack is located on the outer side of the bottom wall of the track on the inner side corresponding to the bends of the two folded sections.

[0022] Furthermore, the limiting frame includes a spring, two connecting studs, and two limiting plates; the two limiting plates are arranged in parallel, the two connecting studs penetrate the two limiting plates perpendicularly, nuts are screwed onto both ends of the connecting studs, and the spring is disposed between the nuts and the corresponding limiting plates, so that the two limiting plates tend to move closer to each other;

[0023] The two connecting studs are located near the end of the limiting plate.

[0024] Furthermore, the bottom of the limiting frame is provided with a slider, which is slidably mounted on a linear track, and the linear track is suspended in place.

[0025] Furthermore, the upper outer peripheral wall of the sliding column is provided with several sets of symmetrically arranged limiting planes.

[0026] The metal material double-sided paint spraying device disclosed in this application, under the action of adjusting rack and adjusting gear, makes the originally inclined flat part rotate to a state perpendicular to the spraying direction of the spray gun of the spraying mechanism. This fundamentally solves the technical problem that traditional fixed-angle spray guns cannot adapt to the inclined surface of the folded plate. At the same time, under the action of the limiting frame, the sliding column can ensure that its posture does not change when the adjusting gear and adjusting rack are not engaged, thus avoiding confusion in angle adjustment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a cold-rolled folded plate structure with a value of 45 in the prior art;

[0028] Figure 2 This is a schematic diagram of the cold-rolled folded plate structure as indicated in this application;

[0029] Figure 3 This is a schematic diagram showing the posture of the same cold-rolled folded sheet at different times in this application;

[0030] Figure 4 This is a schematic diagram of the posture of the same cold-rolled folded sheet at different times in this application, converging in the hypothetical paint spraying area;

[0031] Figure 5 This is a schematic diagram of the design principle of the angle adjustment track in this application;

[0032] Figure 6 This is a schematic diagram (top view) of the overall structure of the double-sided paint spraying device for metal materials in this application.

[0033] Figure 7 This is a schematic diagram of the limit frame structure in this application;

[0034] Figure 8 This is a schematic diagram of the spraying device structure in this application;

[0035] Figure 9 for Figure 8 Enlarged view of a portion of point A in the middle;

[0036] Figure 10 This is a partially enlarged schematic diagram of the bend in the angle adjustment track in this application;

[0037] Figure 11 for Figure 10 Another pose diagram;

[0038] Figure 12 for Figure 10 Another posture diagram.

[0039] In the picture:

[0040] 1. Spraying mechanism; 2. Moving frame; 3. Lifting frame; 4. Spraying frame; 40. Adjusting rod; 400. Sliding ring; 41. Sliding rod; 42. Connecting rod; 44. Spray gun; 45. Adjusting slide rail; 5. Circular conveying track; 6. Angle adjustment track; 7. Linear track; 8. Limiting frame; 80. Limiting plate; 81. Connecting stud; 82. Nut; 83. Spring; 9. Cold-rolled folded plate; 90. Flat part; 91. Sliding column; 910. Limiting plane; 92. Assuming painting area; 93. Inner ring track; 94. Outer ring track; 95. Sliding disc; 96. Adjusting gear; 97. Adjusting rack; 98. Universal ball. Detailed Implementation

[0041] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0042] Please refer to Figure 6 A double-sided paint spraying device for metal materials includes: two symmetrically arranged spraying mechanisms 1; the two symmetrically arranged spraying mechanisms 1 are respectively arranged on both sides of the annular conveying track 5 to form a working space for opposing spraying, so as to ensure that both sides of the cold-rolled folded plate 9 can be uniformly coated at the same time.

[0043] The annular conveyor track 5 has an angle adjustment track 6 in the section between the two spraying mechanisms 1. The number of folded sections of the angle adjustment track 6 is the same as the number of flat parts 90 of the cold-rolled folded sheet 9 to be sprayed. The annular conveyor track 5 serves as the core conveyor, and the key section between the two spraying mechanisms 1 is designed as the angle adjustment track 6. The number of folded sections of the angle adjustment track 6 is strictly consistent with the number of flat parts 90 (including vertical planes and inclined surfaces) of the cold-rolled folded sheet 9 to be sprayed, so that the bending rhythm of the track is precisely matched with the folded contour of the sheet, providing a basis for the subsequent adaptive adjustment of the sheet angle.

[0044] Please refer to Figure 2 The sliding column 91 is slidably mounted on the annular conveying track 5, and a cold-rolled folded plate 9 is hung below the sliding column 91; an adjusting gear 96 is provided on the sliding column 91; the sliding column 91 is slidably mounted on the annular conveying track 5, and the cold-rolled folded plate 9 is stably hung below it by a hook to ensure that the plate does not fall off or shake significantly during the conveying process.

[0045] Please refer to Figures 10 to 12 The adjusting rack 97 is located at the bend of two adjacent folded sections of the angle adjusting track 6; the adjusting gear 96 fixedly mounted on the sliding column 91 is the core transmission component for realizing the angle adjustment of the plate.

[0046] The circumference of the adjusting gear 96 is m, the supplementary angle between two adjacent planar parts 90 is a, and the length of the adjusting rack 97 at the corner of the folded section corresponding to the junction of two adjacent planar parts 90 and the angle adjusting track 6 is ma / 360°. The adjusting rack 97 is fixedly set at the bend of two adjacent folded sections of the adjusting track, and its length is designed strictly according to the formula "ma / 360°", where m is the circumference of the adjusting gear 96 and a is the supplementary angle between two adjacent planar parts 90. This length design ensures that when the adjusting gear 96 and the adjusting rack 97 are fully engaged, the adjusting gear 96 rotates exactly by angle a, thereby driving the sliding column 91 and the cold-rolled folded plate 9 below to rotate synchronously by angle a, so that the originally inclined planar part 90 rotates exactly to a state perpendicular to the spraying direction of the spray gun 44 of the spraying mechanism 1, fundamentally solving the technical pain point that the traditional fixed angle spray gun 44 cannot adapt to the inclined surface of the folded plate.

[0047] The limiting frame 8 is reciprocatingly slidably positioned above the annular conveyor track 5. The limiting frame 8 elastically clamps the top of the sliding column 91 to limit the rotation of the sliding column 91 when the adjusting gear 96 and the adjusting rack 97 are not engaged. The limiting frame 8 reciprocates and slides above the annular conveyor track 5. Through its elastic clamping structure, it acts on the top of the sliding column 91. When the adjusting gear 96 and the adjusting rack 97 are not engaged, it can effectively limit the rotation of the sliding column 91, ensuring that the plate maintains a stable posture in the non-angle adjustment section. It also ensures that the posture remains unchanged from the previous folding section to the next folding section, avoiding confusion in angle adjustment and avoiding spraying deviation caused by conveyor vibration or airflow. This ensures the verticality and uniformity of vertical surface spraying.

[0048] Please refer to Figure 8 Furthermore, the spraying mechanism 1 includes a movable frame 2, a lifting frame 3, and a spraying frame 4. The moving direction of the movable frame 2 is consistent with the parallel direction of the two spraying mechanisms 1. The lifting frame 3 is lifted and lowered on the movable frame 2, and the spraying frame 4 is mounted on the lifting frame 3.

[0049] The spraying mechanism 1 includes a movable frame 2, a lifting frame 3, and a spraying frame 4. The moving direction of the movable frame 2 is consistent with the parallel direction of the two spraying mechanisms 1, that is, it moves along the width direction of the cold-rolled folded plate 9. The lifting frame 3 is lifted and set on the movable frame 2 by a screw, and the spraying frame 4 is fixedly assembled on the lifting frame 3.

[0050] The lateral movement of the movable frame 2 is used to adjust the direct spraying area, which usually does not require adjustment.

[0051] The lifting and adjusting mechanism of the lifting frame 3 can be adapted to cold-rolled folded plates 9 of different heights (lengths).

[0052] In practical applications, the moving frame 2 and the lifting frame 3 can be driven by servo motors and used in conjunction with position sensors to achieve precise positioning, thereby further improving the spraying accuracy.

[0053] The specific structures of the mobile frame 2 and the lifting frame 3 are common in industrial automation and are existing technologies. Their structures and principles will not be described in detail in this embodiment.

[0054] Please refer to Figure 9 Furthermore, the spraying frame 4 includes an adjusting rod 40, an adjusting slide rail 45, a sliding rod 41, and several spray guns 44. The several spray guns 44 are sleeved on the sliding rod 41 in the vertical direction. Except for the central spray gun 44, which is fixed, the other spray guns 44 are slidably mounted with the sliding rod 41. The spraying frame 4 includes an adjusting rod 40, an adjusting slide rail 45, a sliding rod 41, and several spray guns 44. The several spray guns 44 are sleeved on the sliding rod 41 in the vertical direction. The central spray gun 44 is fixed and serves as the spraying reference. The other spray guns 44 are slidably mounted with the sliding rod 41 and can move up and down along the sliding rod 41.

[0055] A sliding ring 400 is provided between each of the two spray guns 44 on the adjusting rod 40. The sliding ring 400 is hinged to the two corresponding spray guns 44 through the connecting rod 42. A sliding ring 400 is sleeved between each of the two adjacent spray guns 44 on the adjusting rod 40. The sliding ring 400 is hinged to the two corresponding spray guns 44 through the connecting rod 42, forming a linkage structure.

[0056] There are two adjusting slide rails 45, which are vertically connected to the lifting frame 3. The two ends of the adjusting rod 40 are slidably set on the two adjusting slide rails 45 respectively, and the two ends of the sliding rod 41 are connected to the two adjusting slide rails 45 respectively.

[0057] Two adjusting slide rails 45 are vertically fixedly connected to the lifting frame 3. The two ends of the adjusting rod 40 are respectively slidably set on the two adjusting slide rails 45 through sliders. The two ends of the sliding rod 41 are fixedly connected to the two adjusting slide rails 45 to ensure the stability of the sliding rod 41.

[0058] When it is necessary to adjust the spacing of the spray guns 44 to accommodate cold-rolled folded plates 9 of different heights (lengths), push the adjusting rod 40 to move horizontally along the adjusting slide rail 45. The sliding ring 400 will synchronously drive the connecting rod 42 to move, so that the spray guns 44 slidably set on the sliding rod 41 move closer or further away from the spray gun 44 fixed in the middle as a reference, so as to realize the rapid and synchronous adjustment of the spacing of the spray guns 44 to accommodate cold-rolled folded plates 9 of different heights (lengths).

[0059] Please refer to Figures 10 to 12 Furthermore, the annular conveying track 5 includes an inner track 93 and an outer track 94. The cross-sections of the inner track 93 and the outer track 94 are both L-shaped. The openings of the two inner tracks 93 and the outer track 94 are arranged facing each other. The inner track 93 and the outer track 94 are hoisted and installed.

[0060] The annular conveying track 5 includes an inner track 93 and an outer track 94. The cross-sections of the inner track 93 and the outer track 94 are both machined into an L-shape. The openings of the two tracks face each other, forming a semi-enclosed limiting structure for the sliding column 91.

[0061] The inner track 93 and the outer track 94 are hoisted to the top of the workshop by means of a lifting beam or bracket. This hoisting method not only saves ground space, but also ensures the levelness and straightness of the track, avoiding conveying deviations caused by uneven ground.

[0062] The L-shaped cross-section design limits the sliding column 91, preventing it from shifting or moving up and down during transport, ensuring that the sliding column 91 moves smoothly along the track, and providing a stable transport foundation for adjusting the plate angle and precise spraying. At the same time, the dual track structure of the inner and outer rings further enhances the load-bearing capacity and stability of the overall structure, adapting to the needs of continuous transport of multiple sliding columns 91 in mass production.

[0063] Furthermore, a sliding disk 95 is provided on the sliding column 91, and a number of universal balls 98 are provided at the bottom of the sliding disk 95. The universal balls 98 are rotatably connected to the bottom walls of the inner track 93 and the outer track 94.

[0064] A sliding disk 95 is fixedly mounted on the sliding column 91. Several universal balls 98 (preferably 6, distributed circumferentially) are evenly arranged on the bottom of the sliding disk 95. The universal balls 98 roll in contact with the bottom walls of the inner track 93 and the outer track 94.

[0065] Under the action of the universal ball 98, the sliding friction between the sliding column 91 and the track is transformed into the rolling friction of the universal ball 98, which greatly reduces the friction during the conveying process. This not only reduces power consumption, but also avoids the sliding column 91 from getting stuck or the conveying speed from being uneven due to excessive frictional resistance, ensuring that the cold-rolled folded plate 9 can pass through the spraying area at a uniform speed and ensuring the consistency of the paint layer thickness.

[0066] The omnidirectional ball 98 can be made of wear-resistant nylon or stainless steel, which has good wear resistance and load-bearing capacity, and can extend the service life of the equipment. At the same time, the rolling contact method of the omnidirectional ball 98 can adapt to the bending transition of the track fold section, ensuring that the sliding column 91 can still move smoothly at the bend of the angle adjustment track 6.

[0067] The horizontal displacement of the sliding disk 95 with the inner wall of the L-shaped inner track 93 and the inner wall of the outer track 94 along the width direction of the annular conveying track 5 is such that it does not affect the meshing of the adjusting gear 96 and the adjusting rack 97, thus avoiding meshing failure; it can also be limited by the sliding column 91 with the bottom edge of the L-shaped inner track 93 toward the edge of the outer track 94 and the outer track 94 toward the edge of the inner track 93.

[0068] Furthermore, the adjusting gear 96 is fixedly mounted on the sliding column 91, and the adjusting gear 96 is located below the annular conveying track 5. The adjusting gear 96 is fixedly mounted on the sliding column 91 by means of a flat key or welding, and is located below the annular conveying track 5. This installation position can avoid interference between the adjusting gear 96 and the track structure, and at the same time facilitates the precise meshing of the adjusting gear 96 with the adjusting rack 97 below.

[0069] The lower end of the sliding column 91 is rotatably connected to the drive chain.

[0070] The lower end of the sliding column 91 is rotatably connected to the drive chain. Specifically, the sliding column 91 is inserted into the hinge of two adjacent links in the chain, replacing the pin that originally connected the two links. The drive chain is driven by a servo motor and a sprocket, providing stable power for the movement of the sliding column 91 along the circular track.

[0071] It should be noted that the chain conveying method in overhead conveying is widely used in industry and is an existing technology. Its specific structure and working principle will not be described in this embodiment.

[0072] Furthermore, the adjusting rack 97 is located on the outer side of the bottom wall of the track corresponding to the bends of the two folded sections.

[0073] The adjusting rack 97 is fixedly installed on the outer side of the inner side of the track bottom wall corresponding to the bends of the two folded sections. The inner side is designed so that the adjusting rack 97 is exactly on the movement trajectory of the adjusting gear 96, ensuring that when the sliding column 91 moves to the bend, the adjusting gear 96 can accurately mesh with the adjusting rack 97 to achieve angle adjustment. The tooth profile of the adjusting rack 97 is precisely matched with the tooth profile of the adjusting gear 96, and the meshing clearance is controlled within the range of 0.02-0.05mm to ensure the smoothness of transmission and the accuracy of angle adjustment, and to avoid angle errors caused by excessive meshing clearance.

[0074] Through analysis Figure 3 It can be concluded that each time the swing occurs, the adjusting gear 96 meshes with the adjusting rack 97 located on the inner side (the side to which it will turn), which can just meet the rotation requirements from one posture to the next posture.

[0075] The bending characteristics of the cold-rolled folded plate 9 determine the actual shape of the angle adjustment track 6. Here, taking 'a' as 45° as an example, the design principle of the angle adjustment track 6 is explained in detail.

[0076] Please refer to the following first. Figure 1 , Figure 1 This example shows a cold-rolled folded sheet 9 with an angle of 45° (top view).

[0077] Please refer to Figure 2 , Figure 2 This is a structural diagram of the cold-rolled folded sheet 9 and the specific location of a.

[0078] Please refer to Figure 3 , Figure 3 The two straight lines that intersect in the middle form a simplified coordinate system.

[0079] Continue to refer to Figure 3 The document shows nine different postures of the cold-rolled folded sheet 9. Figure 3The nine postures of the cold-rolled folded plate 9 are regarded as different postures of the cold-rolled folded plate 9 at different times. That is to say, at a certain moment, the cold-rolled folded plate 9 is in posture ①, and at the next moment, the cold-rolled folded plate 9 is in posture ②.

[0080] Continue to refer to Figure 3 It is observed that the first segment of the line located on the X-axis, namely the folded segment, is always perpendicular to the X-axis; assuming that the spraying direction of the spray gun 44 is parallel to the X-axis and located on the left side of the posture shown in ①, if each flat part 90 in the cold-rolled folded plate 9 can always be perpendicular to the spray gun 44 when passing through the assumed spraying area 92, then each flat part 90 of the cold-rolled folded plate 9 can always be sprayed with paint in the vertical direction.

[0081] Figure 3 The circle in the diagram is a schematic diagram of the sliding column 91, whose lower end can be connected to the cold-rolled folded plate 9 through two rod structures with a certain angle.

[0082] Please refer to Figure 4 ,Will Figure 3 The remaining eight postures of the cold-rolled folded sheet 9 all move with the assumed paint spraying area 92 as the target area, and will obtain Figure 4 The diagram shows the trajectory of the sliding column 91 as it ensures that each flat part 90 is perpendicular to the spray gun 44.

[0083] Please refer to Figure 5 Once the motion trajectory of the sliding column 91 is obtained, inner and outer ring tracks 94 are set on both sides of it to form the angle adjustment track 6 connected in the annular conveying track 5.

[0084] It should be noted that the movement of the sliding column 91 is not intended to perform the following... Figure 5 For the sharp bend shown in C, it is only necessary to ensure that there is a point at the bend of the inner and outer ring tracks 94 that corresponds to the position of the sliding column 91. Of course, due to the difference in diameter between the inner and outer rings, in actual practice, the bottom plate (a horizontal part) of the inner ring (taking the L-shaped cross-section track as an example) can be made wider, that is, extended a little more towards the outer ring, and the bottom (a horizontal part) of the outer ring (also taking the L-shaped cross-section track as an example) can be made narrower, so that the intersection of the extension lines of the two folded segments forming the bend is located in the middle of the inner and outer ring tracks 94.

[0085] In addition, during the actual painting process, the entire cold-rolled folded plate 9 moves along its own width direction. In other words, the longitudinal distance between each circle point is actually stretched, which makes the entire trajectory longer in the vertical direction, but does not affect the turning angle at each bend, because the turning angle is determined by the characteristics of the cold-rolled folded plate 9 itself.

[0086] Please refer to Figure 7 Furthermore, the limiting frame 8 includes a spring 83, two connecting studs 81 and two limiting plates 80; the two limiting plates 80 are arranged in parallel, the two connecting studs 81 penetrate the two limiting plates 80 perpendicularly, the two ends of the connecting studs 81 are screwed with nuts 82, and the spring 83 is arranged between the nuts 82 and the corresponding limiting plates 80 so that the two limiting plates 80 tend to move closer to each other.

[0087] Two connecting studs 81 are located near the end of the limiting plate 80.

[0088] The limiting frame 8 includes a spring 83, two connecting studs 81, and two limiting plates 80. The two limiting plates 80 are arranged in parallel and opposite directions. The two connecting studs 81 penetrate vertically through the ends of the two limiting plates 80. Nuts 82 are screwed onto both ends of the connecting studs 81. The spring 83 is sleeved on the connecting studs 81 and located between the nuts 82 and the outer walls of the corresponding limiting plates 80. By tightening or loosening the nuts 82, the compression of the spring 83 can be adjusted, thereby adjusting the clamping force between the two limiting plates 80, so that the two limiting plates 80 always tend to move closer to each other, achieving elastic clamping of the top of the sliding column 91.

[0089] The limiting frame 8 can prevent rotation in the non-engaged state and avoid excessive clamping force that could cause wear on the sliding column 91 or increase movement resistance. Wear-resistant rubber pads can be attached to the inner wall of the limiting plate 80, which can increase the friction with the sliding column 91, improve the limiting effect, and prevent scratches on the surface of the sliding column 91.

[0090] Furthermore, the bottom of the limiting frame 8 is provided with a slider, which is slidably mounted on the linear track 7, which is hoisted in place.

[0091] The bottom of the limit frame 8 is fixedly equipped with a slider, which is slidably mounted on the linear track 7. The linear track 7 is suspended by a bracket and located above the annular conveyor track 5.

[0092] When the sliding column 91 moves along the circular conveyor track 5 under the drive of the chain, the top of the sliding column 91 is limited by the limit frame 8 and cannot rotate. At the same time, the limit frame 8 will also move back and forth with the sliding column 91, and the sliding column 91 will also move synchronously between the two limit frames 8.

[0093] Please refer to Figure 10 Furthermore, the upper outer peripheral wall of the sliding column 91 is provided with several sets of symmetrically arranged limiting planes 910.

[0094] The limiting plane 910 is mainly used to increase the limiting effect of the limiting frame 8 on the sliding column 91.

[0095] In actual cold-rolled folded sheet products 9, 'a' is commonly 30°, 45°, and 60°. Therefore, in this embodiment, the angular gradient of the sliding column 91 is 15°, meaning there are a total of 24 (360° / 15°=24) limiting planes 910 on the sliding column 91. When 'a' is 30°, after meshing with a certain adjusting gear 96 and adjusting rack 97, the sliding column 91 will rotate two angular gradients, i.e., 30°. The limiting plate 80 will replace the limiting planes 910 on the sliding column 91 twice, i.e., first replace it with the next set of corresponding limiting planes 910, and then replace it with the next set of limiting planes 910. When 'a' is 45°, it will replace it three times. The advantage of this setting is that after the required angular rotation, the two limiting plates 80 can still precisely clamp a set of opposing limiting planes 910, thereby ensuring the anti-rotation effect of the limiting plates 80 on the sliding column 91 when passing through the non-meshing area.

[0096] It is conceivable that if the angle of the cold-rolled folded plate 9 is not a multiple of 15, in practice, the actual cold-rolled folded plate 9 can be modeled using computer-aided software, and the angles between each plane portion 90 can be measured in the modeling software, and the design can be carried out under the guidance of this application.

[0097] The reason why the limiting plate 80 can elastically clamp the sliding column 91 is that the limiting plate 80 also needs to be able to adapt to the strong rotational force generated by the meshing of the adjusting gear 96 and the adjusting rack 97, so that the sliding column 91 can rotate relative to the limiting plate 80.

[0098] In the industry, the vertical spraying of this type of cold-rolled folded plate 9 can be achieved to some extent by using electrical control components (servo motors under PLC control) to twist and swing the nozzle. However, this will bring greater economic costs, such as the debugging, maintenance and protection of electrical control components. In contrast, this application can avoid the introduction of many electrical control components by using a special design for the angle adjustment track 6, thereby reducing economic costs.

[0099] Most spraying equipment in the industry typically sprays up and down repeatedly. Such equipment requires continuously driving several spray guns to move up and down repeatedly, which would result in a significant economic cost compared to the technical solution provided in this application.

[0100] The improvements in this application are based on existing molding equipment. Since some of the equipment is prior art, this application only illustrates the key principles that are emphasized and improved, which should be clear to those skilled in the art.

Claims

1. A double-sided paint spraying device for metal materials, characterized in that, include: Two symmetrically arranged spraying mechanisms (1); A ring conveying track (5) is provided with an angle adjustment track (6) between two spraying mechanisms (1). The number of folded sections of the angle adjustment track (6) is the same as the number of flat sections (90) of the cold-rolled folded plate (9) to be sprayed. A sliding column (91) is slidably disposed on the annular conveying track (5), and an adjusting gear (96) is provided on the sliding column (91). Adjusting rack (97) is set at the bend of two adjacent folded sections of the angle adjustment track (6); The circumference of the adjusting gear (96) is m, the supplementary angle between the two adjacent planar parts (90) is a, and the length of the adjusting rack (97) at the corner of the folded section corresponding to the connection of the two adjacent planar parts (90) and the adjusting rack (97) on the adjusting track is ma / 360°. This length design ensures that when the adjusting gear (96) and the adjusting rack (97) are fully engaged, the adjusting gear (96) rotates exactly by angle a, thereby driving the sliding column (91) and the cold-rolled folded plate (9) below to rotate synchronously by angle a, so that the originally inclined planar part (90) rotates exactly to a state perpendicular to the spraying direction of the spray gun (44) of the spraying mechanism (1); The limiting frame (8) is reciprocally slidably disposed above the annular conveying track (5); the limiting frame (8) elastically clamps the top of the sliding column (91) to limit the rotation of the sliding column (91) in the non-meshing state of the adjusting gear (96) and the adjusting rack (97).

2. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The spraying mechanism (1) includes a movable frame (2), a lifting frame (3) and a spraying frame (4). The moving direction of the movable frame (2) is consistent with the parallel direction of the two spraying mechanisms (1). The lifting frame (3) is raised and lowered on the movable frame (2), and the spraying frame (4) is set on the lifting frame (3).

3. The double-sided paint spraying device for metal materials according to claim 2, characterized in that, The spraying frame (4) includes an adjusting rod (40), an adjusting slide rail (45), a sliding rod (41), and a plurality of spray guns (44). The plurality of spray guns (44) are sleeved on the sliding rod (41) in the vertical direction. Except for the central spray gun (44), which is fixedly set, the other spray guns (44) are slidably set with the sliding rod (41). The adjusting rod (40) is provided with a sliding ring (400) between each of the two spray guns (44), and the sliding ring (400) is hinged to the two corresponding spray guns (44) respectively through the connecting rod (42); There are two adjusting slide rails (45), which are vertically connected to the lifting frame (3). The two ends of the adjusting rod (40) are respectively slidably set on the two adjusting slide rails (45), and the two ends of the sliding rod (41) are respectively connected to the two adjusting slide rails (45).

4. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The annular conveying track (5) includes an inner track (93) and an outer track (94). The cross-section of the inner track (93) and the outer track (94) is L-shaped. The openings of the two inner tracks (93) and the outer track (94) face each other. The inner track (93) and the outer track (94) are hoisted.

5. The double-sided paint spraying device for metal materials according to claim 4, characterized in that, The sliding column (91) is provided with a sliding disk (95), and the bottom of the sliding disk (95) is provided with several universal balls (98). The universal balls (98) are rolledly connected to the bottom wall of the inner ring track (93) and the outer ring track (94).

6. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The adjusting gear (96) is fixedly mounted on the sliding column (91), and the adjusting gear (96) is located below the annular conveying track (5); The lower end of the sliding column (91) is rotatably connected to the drive chain.

7. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The adjusting rack (97) is located on the outside of the bottom wall of the track on the inner side corresponding to the bends of the two folded sections.

8. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The limiting frame (8) includes a spring (83), two connecting studs (81) and two limiting plates (80); the two limiting plates (80) are arranged in parallel, and the two connecting studs (81) penetrate the two limiting plates (80) perpendicularly. Nuts (82) are screwed on both ends of the connecting studs (81), and the spring (83) is arranged between the nut (82) and the corresponding limiting plate (80) so that the two limiting plates (80) tend to move closer to each other. The two connecting studs (81) are located near the end of the limiting plate (80).

9. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The bottom of the limiting frame (8) is provided with a slider, which is slidably mounted on the linear track (7), which is hoisted.

10. The double-sided paint spraying device for metal materials according to claim 1, characterized in that, The upper outer peripheral wall of the sliding column (91) is provided with several sets of symmetrically arranged limiting planes (910).

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