A cover plate bending mechanism and its bending and spraying process

Abstract

This invention relates to a cover plate bending mechanism and its bending and painting process, comprising an upper die for bending the product, a lower die for bending the product's bending position, a material conveying mechanism for moving the product, and a camera mechanism for filming the product; the upper die is disposed at the equipment drive end; the lower die is disposed at the equipment processing table; the material conveying mechanism is oscillatingly disposed at both the equipment drive end and the equipment processing table; the camera mechanism is disposed opposite to each other on both sides of the lower die. This invention solves the problems of existing solutions that use multiple bending machines to bend the cover plate, resulting in excessive bending processes, slow production efficiency, and the fact that while the paint protects the cover plate, long-term corrosion from chemical solutions can still damage it.

Description

Technical Field

[0001] This invention relates to the field of bending, and more particularly to a cover plate bending mechanism and its bending and spraying processes. Background Technology

[0002] In chemical experiments, lab cabinets, fume hoods, or reagent cabinets are frequently used. These cabinets are used to store chemical reagents or for chemical experiments. The cover is one of the components of such cabinets; it is sway-connected to the main body of the cabinet on the operator-facing side. The cover is used to conceal the internal structure and components of the cabinet. A swing shaft is located on the main body of the cabinet. By bending one side of the cover into a circle, the bent position of the cover is positioned on the swing shaft, allowing the cover to swing along the shaft.

[0003] Because the cover conceals the internal structure and components of the cabinet, and is located near the operator's work area, chemical solutions often drip onto it, making that area particularly susceptible to corrosion. Furthermore, when inspecting the cabinet, the cover needs to be opened, and it's crucial to ensure it can swing smoothly.

[0004] Traditional methods of processing manhole covers involve bending them using multiple bending machines, resulting in excessive bending steps and slow production efficiency. After bending, workers apply paint using hand-held spray guns. While the paint provides some protection, long-term corrosion from the chemical solutions can still damage the manhole covers. Therefore, addressing these issues is crucial. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a cover plate bending mechanism and its bending and spraying process, so as to solve the problems of excessive bending process and slow production efficiency in the prior art, which involves bending the cover plate with multiple bending machines, and the fact that although the paint plays a protective role for the cover plate, it will still damage the cover plate due to long-term corrosion by chemical solutions.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A cover plate bending mechanism;

[0008] The device includes an upper die for bending products, a lower die for bending the product, a material conveying mechanism for moving the product, and a camera mechanism for filming the product. The upper die is located at the device drive end. The lower die is located at the device processing table. The material conveying mechanism is oscillatingly mounted at both the device drive end and the device processing table. The camera mechanism is positioned opposite each other on both sides of the lower die.

[0009] A further technical solution is as follows: the lower mold includes a bottom mold, a top mold slidably disposed on the bottom mold, a bending position for bending the product, and a bending groove for bending the product; the bending position is opened opposite to the bottom mold and the top mold; the bending groove is opened on the top mold; the upper mold has a bending part for bending the product; the bending part presses the product down into the bending groove.

[0010] A further technical solution is as follows: the material conveying mechanism includes a first material conveying frame, a first power device for moving products, a second material conveying frame disposed at the drive end of the first power device, a second power device for flipping products, and an adsorption plate for adsorbing products; the adsorption plate is connected to the drive end of the second power device; the first power device is disposed on the first material conveying frame; the first material conveying frame is respectively oscillatingly disposed at the equipment drive end and the equipment processing table.

[0011] A further technical solution is as follows: the material conveying mechanism further includes a rod rotatably mounted on the second material conveying frame, an inner rod mounted on the adsorption plate, an outer rod mounted on the rod, and a first elastic device that elastically supports the adsorption plate; the inner rod slides along the outer rod; the first elastic device is placed inside the outer rod.

[0012] A further technical solution is as follows: the cover plate bending mechanism further includes a drive mechanism for transmitting the material conveying mechanism; the drive mechanism includes a drive chain, a drive wheel disposed at the swing position of the first material conveying frame, pull rods that elastically pull both ends of the drive chain, a sprocket that tensions the drive chain, and a third power device that drives the sprocket to move; the pull rods are respectively disposed at the equipment drive end and the equipment processing table; the drive chain is wound around the drive wheel; the sprocket is rotatably disposed at the drive end of the third power device.

[0013] A cover plate bending and spraying process;

[0014] When the cover plate bending machine is working, the cover plate bending and spraying process includes the following steps:

[0015] Bending and forming steps: Bending and forming involves multiple processing steps:

[0016] First processing step: The material handling mechanism located at the drive end of the equipment picks up the product;

[0017] The second processing step: The material conveying mechanism at the drive end of the equipment bends the product; the material conveying mechanism at the processing table of the equipment shapes the product; the camera mechanism captures the bent product and the shaped product; if the product bending and shaping is not qualified, the first processing step is repeated; if the product bending and shaping is qualified, the third processing step is performed.

[0018] The third processing step: The material conveying mechanism located on the equipment processing table will recycle the formed product;

[0019] Fourth processing step: The material conveying mechanism located at the drive end of the equipment places the bent product onto the material conveying mechanism located on the processing table of the equipment; repeat the first processing step;

[0020] Surface treatment steps: Surface treatment includes multiple cleaning steps:

[0021] First cleaning step: After molding, the product is immersed in degreasing solution and then powered on; processing temperature: 75~80℃; processing time: 4~7s; after molding, the product is removed and rinsed with pure water.

[0022] Second cleaning step: After molding, the product is immersed in phosphating solution for treatment; treatment temperature: 44~47℃; treatment time: 5~6min; treatment pH value: 2.35~3; after molding, the product is taken out, rinsed with pure water and dried.

[0023] Spray drying process: Spray drying includes several processing steps:

[0024] First processing step: Preheat the molded product; blow clean the surface of the molded product; Preheating temperature: 120~130℃; Preheating time: 4min;

[0025] Second processing step: Spray paint onto the molded product and dry it; heating temperature: 150~160℃; heating time: 2min;

[0026] The third processing step: blow-brush the surface of the shaped product and dry it, then put the finished product into storage; heating temperature: 195~205℃; heating time: 7min.

[0027] A further technical solution is as follows: First processing step: The equipment drive end moves upward, the third power unit drive end extends the drive sprocket and moves, the drive chain pulls the material conveying mechanism located at the equipment drive end to swing clockwise and the material conveying mechanism located at the equipment processing table to swing counterclockwise; the adsorption plate of the material conveying mechanism located at the equipment drive end adsorbs the product; the material conveying mechanism located at the equipment processing table does not move;

[0028] Second processing step: The equipment drive end moves downward, the third power unit drive end retracts and drives the drive sprocket to move, the drive chain pulls the material conveying mechanism located at the equipment drive end to swing counterclockwise and the material conveying mechanism located at the equipment processing table to swing clockwise; the material conveying mechanism located at the equipment drive end drives the product to be placed between the upper mold and the top mold; the equipment drives the upper mold to bend the product in the bending groove; the material conveying mechanism located at the equipment processing table drives the bent product to be placed between the bottom mold and the top mold; the equipment drives the bending position to form the product; the camera mechanism captures the bent product and the formed product; if the product bending and forming is unqualified, the first processing step is repeated; if the product bending and forming is qualified, the third processing step is performed;

[0029] Third processing step: The drive end of the equipment moves upward, the drive end of the third power unit extends the drive sprocket and moves, the drive chain pulls the material conveying mechanism located at the drive end of the equipment to swing clockwise and the material conveying mechanism located at the processing table of the equipment to swing counterclockwise; the material conveying mechanism located at the drive end of the equipment takes out the bent product; the material conveying mechanism located at the processing table of the equipment takes out the shaped product; the adsorption plate of the material conveying mechanism located at the processing table of the equipment stops adsorbing the shaped product, and the shaped product falls and is recycled;

[0030] Fourth processing step: The equipment drive end moves downward, the third power unit drive end retracts and drives the drive sprocket to move, the drive chain pulls the material conveying mechanism located at the equipment drive end to swing counterclockwise and the material conveying mechanism located at the equipment processing table to swing clockwise; the suction plate of the material conveying mechanism located at the equipment drive end stops adsorbing the bent product; the suction plate of the material conveying mechanism located at the equipment processing table adsorbs the bent product; repeat the first processing step.

[0031] A further technical solution is as follows: the mass percentage of each component in the degreasing solution in the first cleaning step is: hydrochloric acid: 32-36%; potassium hydroxide: 18-26%; detergent: 4-6%; surfactant: 1-1.5%; the remainder is pure water.

[0032] A further technical solution is as follows: the mass percentage of each component in the phosphating solution in the second cleaning step is as follows: zinc oxide: 12-20 g / L; 85% phosphoric acid: 36-72 ml / L; sodium nitrate: 5-10 g / L; ozone is introduced into the phosphating solution; ozone concentration: 3-3.5 mg / L; ozone flow rate: 0.3-0.6 L / min.

[0033] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) The automatic bending and forming of the product is completed by the material conveying mechanism, and the bending and forming shape is calibrated by the camera mechanism, which ensures the forming quality of the product. This allows one set of equipment to complete the two processes of bending and straightening of the product, which improves the production efficiency. Since the product forming quality is good, no defects will be formed on the surface, which is convenient for the product to be phosphated and coated after forming, which improves the corrosion resistance of the product. It is also convenient for spraying paint, which will not cause the paint to fall off; (2) The post-bending processing is placed between the bending positions. The upper mold pushes the bottom mold and the top mold to approach each other to complete the bending forming process, which improves the production efficiency of product processing. At the same time, it also satisfies the processing action of bending, straightening and transfer between the two sets of material conveying mechanisms; (3) The up and down movement of the equipment drive end can complete the left and right movement of the sprocket and complete the tensioning of the drive chain. However, there will be a gap between the sprocket and the drive chain. The sprocket is driven to move by the third power device, so that the drive chain is always in a tensioned state and is wrapped around the sprocket. (4) After molding, a large number of hydrogen and oxygen bubbles will continuously precipitate on the surface of the product. These bubbles will produce a strong impact. The oil film on the surface of the product after molding will be torn and dispersed into small oil droplets. The small bubbles of hydrogen and oxygen that emerge from the surface of the product after molding will remain on the oil droplets. As the small bubbles gradually grow larger, the buoyancy of the bubbles will be greater than the adhesion of the oil droplets. The bubbles will carry the oil droplets away from the surface of the product after molding and enter the degreasing liquid. The bubbles will drive the oil droplets to gradually rise away from the surface of the product after molding. The process of a large number of bubbles precipitating on the surface of the product after molding and gradually rising will have a stirring effect on the solution, which will strongly emulsify the surface of the product after molding and accelerate the degreasing process. (5) After the second cleaning step, a layer of fine and dense phosphate film will be formed on the surface of the product after molding, which will improve the adhesion of the paint in the later spraying and improve the anti-corrosion performance of the cover plate. (6) During the drying process, the paint is subjected to the force of the blowing wind, which will prevent the paint from producing bubbles and allow it to adhere well to the surface of the product after molding. The spraying and drying process ensures that the paint thickness is relatively uniform after the product is formed. Attached Figure Description

[0034] Figure 1 A schematic diagram of the cover plate bending mechanism according to the first embodiment of the present invention is shown.

[0035] Figure 2 It shows Figure 1 Enlarged structural diagram at point A in the middle.

[0036] Figure 3 A schematic diagram of the structure of the inner rod, outer rod, and first elastic device according to the first embodiment of the present invention is shown.

[0037] Figure 4 It shows Figure 1Enlarged structural diagram at point B in the middle.

[0038] The attached diagram is labeled as follows: 1. Upper mold; 11. Bending section; 2. Lower mold; 21. Bottom mold; 22. Top mold; 23. Bending position; 24. Bending groove; 25. Mold rod; 26. Third elastic device; 3. Material conveying mechanism; 31. First material conveying frame; 32. First power device; 33. Second material conveying frame; 34. Second power device; 35. Adsorption plate; 36. Rod; 37. Inner rod; 38. Outer rod; 39. First elastic device; 4. Camera mechanism; 5. Drive mechanism; 51. Drive chain; 52. Drive wheel; 53. Pull rod; 54. Sprocket; 55. Third power device; 56. Pulling bracket; 57. Second elastic device; 58. Tensioning frame; 6. Connecting plate. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the device proposed by this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0040] Figure 1 A schematic diagram of the cover plate bending mechanism according to the first embodiment of the present invention is shown. Figure 2 It shows Figure 1 Enlarged structural diagram at point A in the middle. Figure 3 A schematic diagram of the structure of the inner rod, outer rod, and first elastic device according to the first embodiment of the present invention is shown. Figure 4 It shows Figure 1 A magnified structural diagram at point B. (Combined with...) Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this invention discloses a cover plate bending mechanism. In the figure, the X direction represents the upper end of the structural schematic diagram of this invention, and the Y direction represents the right end of the structural schematic diagram of this invention.

[0041] The cover plate bending mechanism includes an upper die 1 for bending the product, a lower die 2 for bending the product, a material conveying mechanism 3 for moving the product, and a camera mechanism 4 for photographing the product. The upper die 1 is located at the equipment drive end. The lower die 2 is located at the equipment processing table. The material conveying mechanism 3 is oscillatingly mounted at both the equipment drive end and the equipment processing table. The camera mechanism 4 is positioned opposite each other on both sides of the lower die 2.

[0042] The upper mold 1 is set in the front-to-back direction. The upper end of the upper mold 1 is connected to the equipment drive end. The lower mold 2 is set in the front-to-back direction. The lower end of the lower mold 2 is connected to the equipment processing table. There are two sets of material conveying mechanisms 3. The material conveying mechanism 3 swings to complete the product picking, bending, transfer, forming and recycling. The camera mechanism 4 judges whether the product bending and forming shape is qualified by shooting the product, and determines whether the processing steps need to be repeated. The products to be processed are stacked at the upper left side of the equipment. The bent and formed products are stacked at the lower left side of the equipment. The automatic bending and forming of the product is completed by the material conveying mechanism 3. The bending and forming shape is calibrated by the camera mechanism 4 to ensure the forming quality of the product. This allows one set of equipment to complete the bending and shaping processes of the product, improving production efficiency. Because the product forming quality is good, no defects are formed on the surface, which is convenient for phosphating and coating after forming, improving the product's corrosion resistance. It also facilitates painting and will not cause paint peeling.

[0043] The lower die 2 includes a bottom die 21, a top die 22 slidably disposed on the bottom die 21, a bending position 23 for bending the product, and a bending groove 24 for bending the product. The bending position 23 is formed opposite to the bottom die 21 and the top die 22. The bending groove 24 is formed on the top die 22. The upper die 1 has a bending portion 11 for bending the product. The bending portion 11 presses the product into the bending groove 24.

[0044] The bottom mold 21 is oriented in the front-to-back direction. The top mold 22 is oriented in the front-to-back direction. The bending groove 24 is formed in the front-to-back direction at the upper end of the top mold 22. The bending part 11 is formed in the front-to-back direction at the lower end of the upper mold 1. The bending position 23 is formed in the vertical direction opposite to each other on the bottom mold 21 and the top mold 22.

[0045] A mold rod 25 is provided on the bottom mold 21. A third elastic device 26 is sleeved on the mold rod 25. The mold rod 25 is positioned vertically on the bottom mold 21. The third elastic device 26 is sleeved vertically on the mold rod 25. The third elastic device 26 exerts an upward thrust on the top mold 22. The top mold 22 slides along the mold rod 25. The mold rod 25 restricts the sliding range of the top mold 22.

[0046] The lower die 2 is a dual-station die. The lower die 2 and the upper die 1 work together to complete two processing steps for the product. The bending section 11 presses the product into the bending groove 24, completing the bending process. The post-bending processing is performed between the bending positions 23. The upper die 1 pushes the bottom die 21 and the top die 22 closer together to complete the bending and forming process, improving production efficiency. It also allows for bending, bending forming, and material transfer between the two sets of material handling mechanisms 3.

[0047] The material conveying mechanism 3 includes a first conveying rack 31, a first power unit 32 for moving products, a second conveying rack 33 disposed at the drive end of the first power unit 32, a second power unit 34 for flipping products, and an adsorption plate 35 for adsorbing products. The adsorption plate 35 is connected to the drive end of the second power unit 34. The first power unit 32 is disposed on the first conveying rack 31. The first conveying rack 31 is oscillatingly disposed at both the equipment drive end and the equipment processing table.

[0048] Preferably, the first power unit 32 is a cylinder. The first power unit 32 is arranged along the direction of the first conveyor frame 31. Preferably, the second power unit 34 is a motor. The second power unit 34 is arranged opposite to the second conveyor frame 33 in the front-rear direction. The front and rear ends of the adsorption plate 35 are connected to the drive ends of the second power unit 34. The adsorption plate 35 has several adsorption holes arranged side by side on the side closest to the product. The adsorption plate 35 is connected to the adsorption source.

[0049] The material conveying mechanism 3 also includes a rod 36 rotatably mounted on the second material conveying frame 33, an inner rod 37 mounted on the adsorption plate 35, an outer rod 38 mounted on the rod 36, and a first elastic device 39 that elastically supports the adsorption plate 35. The inner rod 37 slides along the outer rod 38. The first elastic device 39 is located inside the outer rod 38.

[0050] The rod 36 is rotatably mounted on the second conveyor frame 33. The outer rod 38 is vertically mounted on the rod 36. The inner rod 37 is vertically mounted on the adsorption plate 35. Preferably, the first elastic device 39 is a spring. The inner rod 37 is slidably mounted inside the outer rod 38. The first elastic device 39 exerts an outward thrust on the inner rod 37.

[0051] The drive end of the second power unit 34 is eccentrically connected to the adsorption plate 35 via the connecting plate 6. One end of the connecting plate 6 is connected to the drive end of the second power unit 34. The other end of the connecting plate 6 is connected to the inner rod 37.

[0052] The cover plate bending mechanism also includes a drive mechanism 5 for the transmission and material feeding mechanism 3. The drive mechanism 5 includes a drive chain 51, a drive wheel 52 positioned at the swing position of the first material feeding frame 31, pull rods 53 elastically pulling both ends of the drive chain 51, a sprocket 54 tensioning the drive chain 51, and a third power device 55 driving the sprocket 54. The pull rods 53 are respectively positioned at the drive end of the equipment and on the processing table. The drive chain 51 is wound around the drive wheel 52. The sprocket 54 is rotatably positioned at the drive end of the third power device 55.

[0053] The driving force of the material conveying mechanism 3 comes from the equipment itself and does not require additional power. The drive mechanism 5 completes the power transmission between the material conveying mechanisms 3. The drive wheel 52 is set at the swing position of the first material conveying frame 31. When the drive wheel 52 rotates, it drives the first material conveying frame 31 to swing.

[0054] The drive chain 51 is wound around the upper drive wheel 52 and the lower drive wheel 52 respectively. A pull bracket 56 is provided on the equipment. A second elastic device 57 is sleeved on the pull rod 53. The pull rod 53 is slidably mounted on the pull bracket 56. The second elastic device 57 pushes the pull rod 53, so that the pull rod 53 forms an elastic connection with the drive chain 51.

[0055] Preferably, the third power unit 55 is a cylinder. The sprocket 54 is rotatably mounted on the drive end of the third power unit 55.

[0056] The drive mechanism 5 also includes a tensioning frame 58 that is oscillatingly connected to each other. The tensioning frame 58 oscillates between the equipment drive end and the equipment processing table. The third power unit 55 is positioned on the tensioning frame 58 at a oscillating connection point. When the equipment drive end moves upward, the tensioning frame 58 oscillates outward, causing the third power unit 55 and the sprocket 54 to move to the left. When the equipment drive end moves downward, the tensioning frame 58 oscillates inward, causing the third power unit 55 and the sprocket 54 to move to the right.

[0057] The up-and-down movement of the device's drive end can itself complete the left-and-right movement of the sprocket 54, thus tensioning the drive chain 51. However, there may be a gap or looseness between the sprocket 54 and the drive chain 51. The third power device 55 drives the sprocket 54 to move, so that the drive chain 51 is always in a taut state and wound around the sprocket 54.

[0058] Preferably, the camera mechanism 4 is an industrial camera. The camera mechanism 4 is positioned opposite each other on the front and rear sides of the lower mold 2. The camera end of the camera mechanism 4 faces the lower mold 2.

[0059] Camera 4 captures images of the bent and folded products, determining their shapes. It then compares the shape of the bent product with a standard shape, and the shape of the folded product with a standard shape. If the comparison fails, camera 4 controls the material handling mechanism 3 to repeat the processing steps until the comparison is successful.

[0060] Second embodiment:

[0061] The second embodiment differs from the first embodiment in that:

[0062] A cover plate bending and spraying process includes the following steps when the cover plate bending machine is working:

[0063] Bending and forming steps: Bending and forming involves multiple processing steps:

[0064] First processing step: The material handling mechanism 3 located at the drive end of the equipment picks up the product.

[0065] First processing step: The equipment drive end moves upward, the third power unit 55 extends the drive sprocket 54 and moves, the drive chain 51 pulls the material conveying mechanism 3 located at the equipment drive end to swing clockwise and the material conveying mechanism 3 located at the equipment processing table to swing counterclockwise. The suction plate 35 of the material conveying mechanism 3 located at the equipment drive end absorbs the product. The material conveying mechanism 3 located at the equipment processing table does not move.

[0066] The equipment drive end moves upward, pulling the tensioning frame 58 to swing outward. The third power device 55 drives the sprocket 54 to move, and the sprocket 54 tensions the drive chain 51. The drive chain 51 drives the drive wheel 52 to rotate. The upper drive wheel 52 drives the material conveying mechanism 3 located at the equipment drive end to swing clockwise, and the lower drive wheel 52 drives the material conveying mechanism 3 located at the equipment processing table to swing counterclockwise.

[0067] The first conveying frame 31 of the conveying mechanism 3 located at the drive end of the equipment swings clockwise, and the adsorption plate 35 approaches the product being processed. The second power unit 34 drives the adsorption plate 35 to rotate around the second conveying frame 33, so that the adsorption plate 35 is in a horizontal state. The drive end of the first power unit 32 extends to drive the adsorption plate 35 to continue to approach the product, and the adsorption plate 35 adsorbs the product being processed.

[0068] The first material conveying frame 31 of the material conveying mechanism 3 located on the equipment processing table swings counterclockwise, while the adsorption plate 35, the second power unit 34, and the first power unit 32 do not move.

[0069] The second processing step: The material conveying mechanism 3 located at the drive end of the equipment bends the product. The material conveying mechanism 3 located at the processing table of the equipment shapes the product. The camera mechanism 4 captures images of the bent and shaped products. If the product bending and shaping is unqualified, the first processing step is repeated. If the product bending and shaping is qualified, the third processing step is performed.

[0070] Second processing step: The equipment drive end moves downward, the third power unit 55 retracts and drives the drive sprocket 54 to move, the drive chain 51 pulls the material conveying mechanism 3 located at the equipment drive end to swing counterclockwise and the material conveying mechanism 3 located at the equipment processing table to swing clockwise. The material conveying mechanism 3 located at the equipment drive end drives the product to be placed between the upper mold 1 and the top mold 22. The equipment drives the upper mold 1 to bend the product in the bending groove 24. The material conveying mechanism 3 located at the equipment processing table drives the bent product to be placed between the bottom mold 21 and the top mold 22. The equipment drives the bending position 23 to form the product. The camera mechanism 4 captures the bent product and the formed product. If the product bending and forming is unqualified, the first processing step is repeated. If the product bending and forming is qualified, the third processing step is performed.

[0071] The equipment drive end moves downward, pulling the tension frame 58 to swing inward. The third power unit 55 drives the sprocket 54 to move, and the sprocket 54 tensions the drive chain 51. The drive chain 51 drives the drive wheel 52 to rotate. The upper drive wheel 52 drives the material conveying mechanism 3 located at the equipment drive end to swing counterclockwise, and the lower drive wheel 52 drives the material conveying mechanism 3 located at the equipment processing table to swing clockwise.

[0072] The first material conveying frame 31 of the material conveying mechanism 3 located at the drive end of the equipment swings counterclockwise, and the adsorption plate 35 and the processed product approach the space between the upper mold 1 and the top mold 22. The second power device 34 drives the adsorption plate 35 to rotate around the second material conveying frame 33, so that the adsorption plate 35 and the processed product are in a horizontal state. The drive end of the first power device 32 extends out to drive the adsorption plate 35 and the processed product to move and adjust the vertical height. The equipment drives the upper mold 1 to bend the product in the bending groove 24.

[0073] The first conveyor frame 31 of the material conveying mechanism 3 located on the processing table of the equipment swings clockwise, and the adsorption plate 35 and the bent product approach the lower mold 2. The second power unit 34 drives the adsorption plate 35 and the bent product to rotate around the second conveyor frame 33, so that the adsorption plate 35 and the bent product are in a horizontal state. The driving end of the first power unit 32 extends to drive the adsorption plate 35 and the bent product to move and adjust their vertical height. The bent product is placed between the bottom mold 21 and the top mold 22. The equipment drives the bending position 23 to form the product.

[0074] Camera unit 4 photographs the product after bending and after forming. Camera unit 4 compares the photographic data with standard shape data. If the product bending and forming is unqualified, the first processing step is repeated. If the product bending and forming is qualified, the third processing step is performed.

[0075] The third processing step: The material conveying mechanism 3 located on the equipment processing table will recycle the formed product.

[0076] Third processing step: The drive end of the equipment moves upward, the drive sprocket 54 extends from the drive end of the third power unit 55 and moves, the drive chain 51 pulls the material conveying mechanism 3 located at the drive end of the equipment to swing clockwise and the material conveying mechanism 3 located at the processing table of the equipment to swing counterclockwise. The material conveying mechanism 3 located at the drive end of the equipment removes the bent product. The material conveying mechanism 3 located at the processing table of the equipment removes the formed product. The suction plate 35 of the material conveying mechanism 3 located at the processing table of the equipment stops suctioning the formed product, and the formed product falls and is recycled.

[0077] The equipment drive end moves upward, pulling the tensioning frame 58 to swing outward. The third power device 55 drives the sprocket 54 to move, and the sprocket 54 tensions the drive chain 51. The drive chain 51 drives the drive wheel 52 to rotate. The upper drive wheel 52 drives the material conveying mechanism 3 located at the equipment drive end to swing clockwise, and the lower drive wheel 52 drives the material conveying mechanism 3 located at the equipment processing table to swing counterclockwise.

[0078] The first material conveying frame 31 of the material conveying mechanism 3 located at the drive end of the equipment swings clockwise, while the adsorption plate 35, the second power unit 34, and the first power unit 32 do not move.

[0079] The first conveying frame 31 of the conveying mechanism 3 located on the processing table of the equipment swings counterclockwise. The second power device 34 drives the adsorption plate 35 to rotate around the second conveying frame 33, causing the adsorption plate 35 to flip. The driving end of the first power device 32 extends out to drive the adsorption plate 35 away from the lower mold 2. The adsorption plate 35 stops adsorbing the bent product, and the bent product falls off to complete the recycling.

[0080] Fourth processing step: The material conveying mechanism 3 located at the drive end of the equipment places the bent product onto the material conveying mechanism 3 located on the processing table of the equipment. Repeat the first processing step.

[0081] Fourth processing step: The equipment drive end moves downward, the third power unit 55 retracts the drive end to drive the sprocket 54 to move, and the drive chain 51 pulls the material conveying mechanism 3 located at the equipment drive end to swing counterclockwise and the material conveying mechanism 3 located at the equipment processing table to swing clockwise. The suction plate 35 of the material conveying mechanism 3 located at the equipment drive end stops adsorbing the bent product. The suction plate 35 of the material conveying mechanism 3 located at the equipment processing table adsorbs the bent product. Repeat the first processing step.

[0082] The equipment drive end moves downward, pulling the tension frame 58 to swing inward. The third power unit 55 drives the sprocket 54 to move, and the sprocket 54 tensions the drive chain 51. The drive chain 51 drives the drive wheel 52 to rotate. The upper drive wheel 52 drives the material conveying mechanism 3 located at the equipment drive end to swing counterclockwise, and the lower drive wheel 52 drives the material conveying mechanism 3 located at the equipment processing table to swing clockwise.

[0083] The first conveying frame 31 of the conveying mechanism 3 located at the drive end of the equipment swings counterclockwise, and the adsorption plate 35 and the bent product approach the conveying mechanism 3 located on the processing table of the equipment. The second power unit 34 drives the adsorption plate 35 and the bent product to rotate around the second conveying frame 33, so that the adsorption plate 35 and the bent product are in a horizontal state. The drive end of the first power unit 32 extends out to drive the adsorption plate 35 and the bent product to move and contact the conveying mechanism 3 located on the processing table of the equipment.

[0084] The first conveying frame 31 of the conveying mechanism 3 located on the processing table of the equipment swings clockwise, and the adsorption plate 35 approaches the conveying mechanism 3 located at the drive end of the equipment. The second power unit 34 drives the adsorption plate 35 to rotate around the second conveying frame 33, so that the adsorption plate 35 is in a horizontal state. The drive end of the first power unit 32 extends to drive the adsorption plate 35 to adjust and contact the conveying mechanism 3 located at the drive end of the equipment. The adsorption plate 35 of the conveying mechanism 3 located at the drive end of the equipment stops adsorption, and the adsorption plate 35 of the conveying mechanism 3 located on the processing table of the equipment starts adsorption. After the bending is completed, the product is transferred and the first processing step is repeated.

[0085] Surface treatment steps: Surface treatment includes multiple cleaning steps:

[0086] First cleaning step: After molding, the product is immersed in a degreasing solution and then electrically powered on. Treatment temperature: 75–80℃. Treatment time: 4–7 seconds. After molding, the product is removed and rinsed with pure water.

[0087] Second cleaning step: After molding, the product is immersed in phosphating solution for treatment. Treatment temperature: 44-47℃. Treatment time: 5-6 minutes. Treatment pH value: 2.35-3. After molding, the product is removed, rinsed with pure water, and dried.

[0088] The mass percentages of the components in the degreasing solution during the first cleaning step are as follows: Silicate hydrochloric acid: 32–36%; Potassium hydroxide: 18–26%; Build-up agent: 4–6%; Surfactant: 1–1.5%; The remainder is pure water.

[0089] The mass percentages of each component in the phosphating solution during the second cleaning step are as follows: Zinc oxide: 12–20 g / L; 85% phosphoric acid: 36–72 ml / L; Sodium nitrate: 5–10 g / L.

[0090] Ozone is introduced into the phosphating solution. Ozone concentration: 3–3.5 mg / L.

[0091] After molding, the product is immersed in a degreasing solution. A direct current is applied to the solution, and due to the polarization of the electrodes, the interfacial tension between the oil and the solution is reduced. The hydrogen and oxygen bubbles generated on the electrodes have a strong tearing effect on the oil film adhering to the molded product, causing it to rapidly transform into tiny oil droplets. Numerous bubbles precipitate on the surface of the molded product, and as these bubbles rise, they carry the tiny oil droplets into the degreasing solution. Electrochemical degreasing is faster than chemical degreasing and has a better oil removal effect.

[0092] In the first cleaning step, the molded product is immersed in a degreasing solution and then electrified. The oil film on the surface of the molded product will crack due to the decrease in surface tension. As the solution increases its wettability on the surface of the molded product, it displaces the oil film from the cracks, thus reducing the adhesion of the oil film to the surface of the molded product.

[0093] After molding, a large number of hydrogen and oxygen bubbles continuously emerge from the product surface. These bubbles generate a strong impact force, tearing and dispersing the oil film on the product surface into tiny oil droplets. The small hydrogen and oxygen bubbles emerging from the product surface remain on these oil droplets. As the small bubbles gradually grow larger, their buoyancy exceeds the adhesion of the oil droplets, causing them to carry the oil droplets away from the product surface into the degreasing solution. The bubbles then carry the oil droplets upwards, away from the product surface. The process of numerous bubbles emerging and rising from the product surface creates a stirring effect on the solution, resulting in strong emulsification of the product surface and accelerating the degreasing process.

[0094] Silicate hydrochloric acid is added to the degreasing solution. Silicate hydrochloric acid has excellent emulsifying properties, effectively removing oil stains from the surface of the molded product. It also has good corrosion inhibition properties; the silicate hydrolyzes in the solution, maintaining a relatively stable solution alkalinity during the degreasing process.

[0095] Potassium hydroxide was added to the degreasing solution. Potassium hydroxide has good solubility, stability and conductivity. The content of potassium hydroxide was controlled at 18-26%, which increased the solution current density and accelerated the degreasing speed. It also made it easier to saponify with the oil on the surface of the molded product.

[0096] The degreasing solution also contains a low-foaming surfactant, and its dosage needs to be strictly controlled. During electrolytic degreasing, the bubbles generated in the solution increase the solution's resistance, leading to reduced current efficiency and decreased cleaning effectiveness. Hydrogen gas released from the surface of the formed product during electrolysis accumulates in the foam; increased hydrogen concentration raises the risk of explosion. Therefore, the amount of surfactant used must be strictly controlled.

[0097] In the second cleaning step, the pH value needs to be controlled between 2.35 and 3. At this pH, the phosphating film has a denser grain structure with narrower gaps between particles, completely covering the surface of the molded product. Increasing the pH value in the second cleaning step will increase the film weight on the surface of the molded product and make it more uniformly distributed.

[0098] Ozone was introduced into the phosphating solution. The ozone participated in the reaction process of the phosphating solution, which made the phosphating film grains small and dense, consisting of thick plate-like grains.

[0099] Ozone participates in the phosphating process on the surface of the molded product, forming mainly zinc phosphate tetrahydrate, along with zinc ferrous phosphate tetrahydrate. As the concentration of ozone introduced into the phosphating solution gradually increases, the strength of zinc phosphate tetrahydrate continuously increases.

[0100] During the phosphating process, the ozone content needs to be strictly controlled. When the ozone concentration is between 2.5 and 3.5 mg / L, the phosphating film is thicker, which will result in stronger corrosion resistance and enhanced protection for the molded product.

[0101] After the second cleaning step, a layer of fine and dense phosphate film will form on the surface of the molded product, which improves the adhesion of the subsequent paint spraying and enhances the corrosion resistance of the cover plate.

[0102] Spray drying process: Spray drying includes several processing steps:

[0103] First processing step: Preheat the molded product. Blow clean the surface of the molded product. Preheating temperature: 120~130℃. Preheating time: 4min.

[0104] The first processing step involves preheating the molded product. Heat is transferred layer by layer through the molded product, resulting in a surface temperature that is higher than the internal temperature. Although the preheating time is relatively long, ensuring that the interior of the molded product is also heated, a temperature difference still exists. By blowing air through the surface of the molded product, the surface temperature is cooled, ensuring a uniform temperature throughout the product.

[0105] Second processing step: Spray paint onto the molded product and dry it. Heating temperature: 150~160℃. Heating time: 2min.

[0106] After preheating the molded product, it is then sprayed and dried. The entire second processing step is relatively short, and the process proceeds directly to the third processing step. At this point, the paint is not yet completely dry; the side of the paint closest to the surface of the molded product adheres to the surface, while the side furthest from the surface is not yet dry.

[0107] In the third processing step, drying is achieved during the blowing process on the surface of the molded product. The airflow combs through the paint on the surface of the molded product, and the paint layer dries layer by layer during the blowing process, increasing the thickness of the components. The thickness of the paint is controlled by adjusting the blowing airflow. The greater the blowing airflow, the more paint is combed through, and the thinner the dried paint thickness. The smaller the blowing airflow, the less paint is combed through, and the thicker the dried paint thickness.

[0108] During the drying process, the paint is subjected to the force of blowing air, which prevents the formation of air bubbles and allows it to adhere well to the surface of the molded product. The spraying and drying process ensures a relatively uniform thickness of the paint coating on the molded product.

[0109] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cover plate bending mechanism, characterized in that: The device includes an upper die for bending products, a lower die for the bending position of the product, a material conveying mechanism for moving the product, and a camera mechanism for filming the product; the upper die is located at the equipment drive end; the lower die is located at the equipment processing table; the material conveying mechanism is oscillatingly mounted at both the equipment drive end and the equipment processing table; and the camera mechanism is positioned opposite each other on both sides of the lower die. The lower mold includes a bottom mold, a top mold slidably disposed on the bottom mold, a bending position for bending the product, and a bending groove for bending the product; the bending position is opened opposite to the bottom mold and the top mold; the bending groove is opened on the top mold; the upper mold has a bending part for bending the product; the bending part presses the product into the bending groove; The material conveying mechanism includes a first material conveying frame, a first power unit for moving products, a second material conveying frame disposed at the drive end of the first power unit, a second power unit for flipping products, and an adsorption plate for adsorbing products; the adsorption plate is connected to the drive end of the second power unit; the first power unit is disposed on the first material conveying frame; the first material conveying frame is oscillatingly disposed at the equipment drive end and the equipment processing table respectively; The cover plate bending mechanism also includes a drive mechanism for transmitting the material conveying mechanism; the drive mechanism includes a drive chain, a drive wheel disposed at the swing position of the first material conveying frame, pull rods that elastically pull both ends of the drive chain, a sprocket that tensions the drive chain, and a third power device that drives the sprocket to move; the pull rods are respectively disposed at the equipment drive end and the equipment processing table; the drive chain is wound around the drive wheel; the sprocket is rotatably disposed at the drive end of the third power device.

2. The cover plate bending mechanism as described in claim 1, characterized in that: The material conveying mechanism further includes a rod rotatably mounted on the second material conveying frame, an inner rod mounted on the adsorption plate, an outer rod mounted on the rod, and a first elastic device that elastically supports the adsorption plate; the inner rod slides along the outer rod; the first elastic device is placed inside the outer rod.

3. A cover plate bending and spraying process, using the cover plate bending mechanism as described in claim 1, characterized in that: When the cover plate bending machine is working, the cover plate bending and spraying process includes the following steps: Bending and forming steps: Bending and forming involves multiple processing steps: First processing step: The material handling mechanism located at the drive end of the equipment picks up the product; The second processing step: The material conveying mechanism at the drive end of the equipment bends the product; the material conveying mechanism at the processing table of the equipment shapes the product; the camera mechanism captures the bent product and the shaped product; if the product bending and shaping is not qualified, the first processing step is repeated; if the product bending and shaping is qualified, the third processing step is performed. The third processing step: The material conveying mechanism located on the equipment processing table will recycle the formed product; Fourth processing step: The material conveying mechanism located at the drive end of the equipment places the bent product onto the material conveying mechanism located on the processing table of the equipment; repeat the first processing step; Surface treatment steps: Surface treatment includes multiple cleaning steps: First cleaning step: After molding, the product is immersed in degreasing solution and then powered on; processing temperature: 75~80℃; processing time: 4~7s; after molding, the product is removed and rinsed with pure water. Second cleaning step: After molding, the product is immersed in phosphating solution for treatment; treatment temperature: 44~47℃; treatment time: 5~6min; treatment pH value: 2.35~3; after molding, the product is taken out, rinsed with pure water and dried. Spray drying process: Spray drying includes several processing steps: First processing step: Preheat the molded product; blow clean the surface of the molded product; Preheating temperature: 120~130℃; Preheating time: 4min; Second processing step: Spray paint onto the molded product and dry it; heating temperature: 150~160℃; heating time: 2min; The third processing step: blow-brush the surface of the shaped product and dry it, then put the finished product into storage; heating temperature: 195~205℃; heating time: 7min.

4. The cover plate bending and spraying process as described in claim 3, characterized in that: First processing step: The drive end of the equipment moves upward, the drive end of the third power unit extends the drive sprocket and moves, the drive chain pulls the material conveying mechanism located at the drive end of the equipment to swing clockwise and the material conveying mechanism located at the processing table of the equipment to swing counterclockwise; the suction plate of the material conveying mechanism located at the drive end of the equipment absorbs the product; the material conveying mechanism located at the processing table of the equipment does not move; Second processing step: The equipment drive end moves downward, the third power unit drive end retracts and drives the drive sprocket to move, the drive chain pulls the material conveying mechanism located at the equipment drive end to swing counterclockwise and the material conveying mechanism located at the equipment processing table to swing clockwise; the material conveying mechanism located at the equipment drive end drives the product to be placed between the upper mold and the top mold; the equipment drives the upper mold to bend the product in the bending groove; the material conveying mechanism located at the equipment processing table drives the bent product to be placed between the bottom mold and the top mold; the equipment drives the bending position to form the product; the camera mechanism captures the bent product and the formed product; if the product bending and forming is unqualified, the first processing step is repeated; if the product bending and forming is qualified, the third processing step is performed; Third processing step: The drive end of the equipment moves upward, the drive end of the third power unit extends the drive sprocket and moves, the drive chain pulls the material conveying mechanism located at the drive end of the equipment to swing clockwise and the material conveying mechanism located at the processing table of the equipment to swing counterclockwise; the material conveying mechanism located at the drive end of the equipment takes out the bent product; the material conveying mechanism located at the processing table of the equipment takes out the shaped product; the adsorption plate of the material conveying mechanism located at the processing table of the equipment stops adsorbing the shaped product, and the shaped product falls and is recycled; Fourth processing step: The equipment drive end moves downward, the third power unit drive end retracts and drives the drive sprocket to move, the drive chain pulls the material conveying mechanism located at the equipment drive end to swing counterclockwise and the material conveying mechanism located at the equipment processing table to swing clockwise; the suction plate of the material conveying mechanism located at the equipment drive end stops adsorbing the bent product; the suction plate of the material conveying mechanism located at the equipment processing table adsorbs the bent product; repeat the first processing step.

5. The cover plate bending and spraying process as described in claim 3, characterized in that: The mass percentages of each component in the degreasing solution in the first cleaning step are as follows: hydrochloric acid: 32-36%; potassium hydroxide: 18-26%; detergent: 4-6%; surfactant: 1-1.5%; and the remainder is pure water.

6. The cover plate bending and spraying process as described in claim 5, characterized in that: In the second cleaning step, the mass percentages of each component in the phosphating solution are as follows: zinc oxide: 12-20 g / L; 85% phosphoric acid: 36-72 ml / L; sodium nitrate: 5-10 g / L; ozone is introduced into the phosphating solution. Ozone concentration: 3–3.5 mg / L; Ozone flow rate: 0.3–0.6 L / min.

Images