Aluminum profile rolling forming device and using method
By designing an aluminum profile rolling and forming device that combines a blowing assembly and a brushing assembly, the problem of difficult removal of waste slag during the rolling process of aluminum profile is solved, and efficient cleaning and high-quality molding are achieved.
Patent Information
- Application Number
- CN202510801695.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2025-08-01
AI Technical Summary
During the rolling and forming process of aluminum profiles, the electrostatic adhesion of waste slag produced by grinding is difficult to remove, affecting the quality of the finished product. The existing cleaning methods lead to debris residues and affecting the cleaning effect.
An aluminum profile rolling molding device is designed, including a blowing assembly and a brushing assembly, which removes debris by combining wind blowing and rolling cleaning, and combines the grinding assembly to treat burrs and burrs. The screw and bevel gear transmission system driven by a servo motor are used to achieve efficient cleaning of debris.
It realizes efficient cleaning of the surface of aluminum profiles, removes residual debris, improves molding quality, and adapts to raw materials of different thicknesses and widths to prevent position deviation and ensures high quality of the finished product.
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Figure CN120394589A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of aluminum profile rolling, and particularly to an aluminum profile rolling and forming device and a using method thereof. Background Technique
[0002] An aluminum profile rolling and forming device is a device used to roll aluminum ingots or other aluminum products into aluminum plates, aluminum strips or profiles of various specifications and thicknesses. It is widely used in fields such as aerospace, automobile manufacturing, packaging, and construction, and is an indispensable part of modern industry.
[0003] Regarding the above related technologies, it is considered that when aluminum profiles are rolled and formed, grinding treatment is required, which will generate a large amount of waste residue. Some of the waste residue adheres to the surface of the aluminum profile due to static electricity and is difficult to remove, which will affect the finished product quality of the aluminum profile. The current cleaning method is mainly to install a cleaning brush at the position where the aluminum profile exits the material, and clean the surface of the aluminum profile. However, some debris will remain in the cleaning brush in this way, and there will always be debris falling onto the surface of the subsequent aluminum profile during cleaning, affecting the overall cleaning effect. Summary of the Invention
[0004] Aiming at the deficiencies of the prior art, the present invention provides an aluminum profile rolling and forming device and a using method thereof, which solve the problems raised in the above background technique.
[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An aluminum profile rolling and forming device and a using method thereof, including a processing table, a U-shaped frame is installed on the right side of the top wall of the processing table, a rolling assembly is installed on the top wall of the U-shaped frame, conveying and limiting assemblies are installed on both the left and right sides of the U-shaped frame, a grinding assembly is installed on the outer wall of the conveying and limiting assembly on the left side, a blanking plate is fixedly installed on the side wall of the conveying and limiting assembly on the left side, and two U-shaped seats are symmetrically arranged left and right on the left side of the top wall of the processing table;
[0006] A blowing and cleaning assembly for blowing debris on the surface of the rolled and formed aluminum profile is installed between the two U-shaped seats;
[0007] A cleaning brush assembly for rolling and cleaning the surface of the rolled and formed aluminum profile is installed on the top wall of the blanking plate and below the blowing and cleaning assembly, and the cleaning brush assembly is meshed and connected with the blowing and cleaning assembly.
[0008] Further, the air-blowing assembly includes two limiting rods symmetrically arranged front and back. The two limiting rods are located between the U-shaped seats and fixedly connected to the U-shaped seats. Fixed seats are fixedly connected to the top walls of the two U-shaped seats. Lead screws are rotatably installed on the adjacent sides of the two fixed seats. A servo motor is fixedly installed on the side wall of the fixed seat on the left. The power shaft of the servo motor passes through the fixed seat through a bearing and is fixedly connected to the left end of the lead screw. The right end of the lead screw passes through the corresponding fixed seat through a bearing and is fixedly installed with a bevel gear one. The bevel gear one is meshed and connected with the cleaning assembly.
[0009] Further, a sliding seat is screwed on the outer wall of the lead screw. The inner walls of the front and rear parts of the sliding seat are slidably connected to the outer walls of the corresponding limiting rods. A fixed frame is fixedly installed on the inner bottom wall of the sliding seat. An air-blowing pipe is fixedly installed on the inner wall of the fixed frame. A plurality of high-pressure air-blowing pipes are uniformly communicated with the bottom end of the air-blowing pipe. The rear end of the air-blowing pipe passes through the fixed frame through a leak-proof rubber sleeve and is connected to an air inlet pipe through a flange. The air inlet pipe is communicated with an external hair dryer.
[0010] Further, the cleaning assembly includes two mounting seats symmetrically arranged front and back. The two mounting seats are both fixedly connected to the top wall of the blanking plate. Drive rods are rotatably installed on the adjacent sides of the two mounting seats. Cleaning brushes are fixedly installed on the outer walls of the front and rear parts of the drive rod. A bevel gear two is fixedly installed in the middle of the outer wall of the drive rod. A fixed platform is fixedly installed on the side wall of the U-shaped seat on the right. A transmission shaft is rotatably installed in the middle of the inner wall of the fixed platform. A bevel gear three is fixedly installed at the top end of the transmission shaft. The bevel gear three is meshed and connected with the bevel gear one. A bevel gear four is fixedly installed at the bottom end of the transmission shaft. The bevel gear four is meshed and connected with the bevel gear two.
[0011] Further, the rolling assembly includes an electric push rod. The electric push rod is fixedly connected to the top wall of the U-shaped frame. Positioning rods are fixedly installed on the front and rear parts of the inner wall of the U-shaped frame. Receiving seats are fixedly installed at the bottoms of the two positioning rods. Rolling rollers one are rotatably installed on the adjacent sides of the two receiving seats. Sliding frames are slidably installed on the outer walls of the tops of the two positioning rods. The side wall of the sliding frame is fixedly connected to the grinding assembly. A rolling roller two is rotatably installed on the inner wall of the sliding frame. Drive motors are fixedly installed on the outer side walls of the receiving seats and the sliding frames. The front roller shafts of the rolling roller two and the rolling roller one pass through the receiving seats and the sliding frames through bearings and are fixedly connected to the power shafts of the corresponding drive motors.
[0012] Further, the conveying and limiting assembly includes two symmetrically arranged feeding frames on the left and right. Both of the two feeding frames are fixedly connected to the outer side walls of the U-shaped frame. A plurality of feeding rollers are evenly and rotatably installed on the inner walls of the two feeding frames. Through grooves are formed in the inner bottom walls of the two feeding frames. Positioning seats are fixedly installed at the front and rear parts of the bottom walls of the two feeding frames corresponding to the through grooves. A positioning shaft is fixedly installed between the two positioning seats on the same side. Sliding plates are slidably installed on the front and rear parts of the outer walls of the two positioning shafts. A connecting plate is fixedly installed between the two sliding plates on the same side. The outer walls of a plurality of the sliding plates are slidably connected to the inner walls of the corresponding through grooves. Guide frames are fixedly installed on the top walls of a plurality of the sliding plates. The outer wall of the guide frame on the left is fixedly connected to the grinding assembly. The bottom walls of a plurality of the guide frames are fitted with the outer walls of the corresponding feeding rollers.
[0013] Further, electric push rods are fixedly installed on the front and rear walls of the feeding frame on the right. The movable ends of the two electric push rods slidably penetrate through the feeding frame and are fixedly connected to the corresponding guide frames. The side wall of the feeding frame on the left is fixedly connected to the blanking plate. Guide plates are fixedly installed on the side walls of the two guide frames on the left. The bottom walls of the two guide plates are slidably connected to the top wall of the blanking plate and are in a matching shape.
[0014] Further, the grinding assembly includes two L-shaped brackets. Both of the two L-shaped brackets are fixedly connected to the top wall of the sliding frame. The same mounting plate is fixedly installed at the bottom ends of the two L-shaped brackets. A plurality of working motors I are evenly and fixedly installed on the top wall of the mounting plate. The power shafts of the plurality of working motors I penetrate through the mounting plate through bearings and are fixedly installed with grinding blocks I. A protective cover is fixedly installed on the top wall of the mounting plate.
[0015] Further, working motors II are fixedly installed on the outer walls of the two guide frames on the left. The power shafts of the plurality of working motors II penetrate through the corresponding guide frames through bearings and are fixedly installed with grinding blocks II. A collection box is installed on the top wall of the left side of the blanking plate. A slag collection box is installed on the top wall of the processing table and below the grinding assembly.
[0016] An aluminum profile rolling and forming method includes the following steps:
[0017] S1. Electrically connect the electric push rod, drive motor, working motor I, working motor II, electric push rod, servo motor, and external blower through an external power supply and a controller. Place the aluminum profile raw material to be rolled and formed on the top positions of the feeding frame and feeding rollers on the right. Push the sliding frame to slide downward along the outer wall of the positioning rod in the inner wall of the U-shaped frame through the electric push rod. Then, the sliding frame drives the rolling roller II and the corresponding drive motor to move downward, so that the rolling roller II approaches the position where the rolling roller I is located, and the distance between the rolling roller II and the rolling roller I matches the thickness specification of the aluminum profile raw material.
[0018] S2. Then, the electric push rod is used to push the guiding frame to slide along the outer wall of the feeding roller, so that the guiding frame gradually approaches the aluminum profile raw material. The feeding width of the aluminum profile raw material is limited by the guiding frame, so that the aluminum profile raw material moves along a predetermined route. When the guiding frame moves, it will drive the sliding plate to slide in the inner wall of the through groove. The sliding plate slides close along the outer wall of the positioning shaft between the positioning seats, and the sliding plate drives the left sliding plate to move along the outer wall of the corresponding positioning shaft through the connecting plate. When the left sliding plate drives the guiding frame to move in the inner wall of the corresponding through groove, it will simultaneously drive the working motor 2 and the grinding block 2 to move to the discharging route of the aluminum profile raw material. When the left guiding frame moves, it will drive the guiding plate to slide along the top position of the blanking plate, thereby limiting the discharging route after the processing of the aluminum profile raw material;
[0019] S4. The feeding roller conveys the aluminum profile raw material to the position between the rolling roller 2 and the rolling roller 1. The driving motor is driven to drive the rolling roller 2 and the rolling roller 1 to rotate. The driving motors on the receiving seat and the sliding frame rotate in opposite directions. The aluminum profile raw material is roll-formed by the mutual rotation of the rolling roller 2 and the rolling roller 1 and conveyed to the left;
[0020] S7. After the processed and formed aluminum profile raw material enters the left feeding roller, since the sliding frame will drive the L-shaped bracket, the mounting plate, the working motor 1 and the grinding block 1 to move downward when moving downward. When the aluminum profile starts to be discharged after being roll-formed, the working motor 2 is used to drive the grinding block 2 to grind the front and rear walls of the aluminum profile, and at the same time, the working motor 1 drives the grinding block 1 to grind the top wall of the aluminum profile. The debris generated by grinding falls into the slag collection frame through the through groove and is collected uniformly;
[0021] S5. The polished aluminum profile slides down through the blanking plate. The servo motor and the external blower are started. When the servo motor rotates, it will drive the lead screw to rotate. When the lead screw rotates, it will drive the bevel gear 1 to rotate, and then the bevel gear 3 engaged with it will rotate synchronously. The bevel gear 3 drives the transmission shaft and the bevel gear 4 to rotate. The bevel gear 4 drives the bevel gear 2 engaged with it to rotate. When the bevel gear 2 rotates, it will drive the transmission rod and the cleaning brush to rotate between the mounting seats. The surface of the aluminum profile sliding down on the blanking plate is cleaned by the rotation of the cleaning brush, and the debris attached and not easy to clean is loosened, which is convenient for the subsequent high-pressure air pipe to blow away the debris;
[0022] S6. After the aluminum profile slides to the left side of the blanking plate, as the screw rod drives the sliding seat to linearly move along the outer walls of the screw rod and the limiting rod, the sliding seat linearly moves from left to right. The sliding seat drives the fixed frame, the air blowing pipe and the high-pressure air blowing pipe to start blowing air from left to right. The external air blower conveys gas into the air blowing pipe through the air inlet pipe and discharges it through the high-pressure air blowing pipe to blow away the debris and impurities on the surface of the aluminum profile after cleaning. When the debris on the surface of the aluminum profile is blown to the right side and then falls into the collection box, it can be collected uniformly.
[0023] The present invention has the following beneficial effects:
[0024] (1). For the aluminum profile rolling and forming device and its using method, through the mutual cooperation of the air blowing component and the cleaning component, after the aluminum profile is rolled and formed, the burr problem on its surface will be polished by the polishing component. Metal debris will be generated during the polishing process. The cleaning component first rolls and brushes the debris that is inconvenient to remove, and then combines with the air blowing component to blow the surface of the aluminum profile, so that the surface of the formed aluminum profile is clean without debris residue, which is convenient for subsequent processing and improves the rolling and forming quality of the aluminum profile.
[0025] (2). For the aluminum profile rolling and forming device and its using method, through the setting of the conveying and limiting component, when the aluminum profile raw material starts to feed, by adjusting the guiding frame to approach the aluminum profile raw material, the feeding route is limited to prevent its position deviation from affecting the rolling and forming effect. And when the guiding frame moves, it will drive the guiding plate to move synchronously, which can limit the discharging route of the rolled and formed aluminum profile, making it convenient to quickly enter the covering areas of the air blowing component and the cleaning component, so that the processing of the aluminum profile can move along the predetermined route and can adapt to aluminum profile raw materials of various widths.
[0026] (3). For the aluminum profile rolling and forming device and its using method, through the setting of the rolling component, during operation, by adjusting the distance between the first rolling roller and the second rolling roller, the rolling and forming of raw materials with different thicknesses can be realized. The driving motor drives the first rolling roller and the second rolling roller to rotate to roll the aluminum profile raw material.
[0027] (4). For the aluminum profile rolling and forming device and its using method, through the setting of the polishing component, after the aluminum profile is rolled and formed, problems such as burrs and rough edges will occur. The top and front and rear walls of the aluminum profile can be fully polished by the first polishing block and the second polishing block to clean up the generated burr problem and improve the forming quality of the aluminum profile.
[0028] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 Front view of the external structure of the present invention
[0030] Figure 2 Schematic diagram of the right side of the external structure of the present invention
[0031] Figure 3 Schematic diagram of the external structure of the rolling component of the present invention
[0032] Figure 4 Combined schematic diagram of the grinding component and the rolling component of the present invention
[0033] Figure 5 Schematic diagram of the external structure of the conveying and limiting component of the present invention
[0034] Figure 6 Exploded view of the internal structure of the conveying and limiting component of the present invention
[0035] Figure 7 Exploded bottom view of the internal structure of the conveying and limiting component of the present invention
[0036] Figure 8 Combined schematic diagram of the air blowing component and the cleaning component of the present invention
[0037] Figure 9 Rear view of the external structure of the air blowing component and the cleaning component of the present invention
[0038] Figure 10 Exploded view of the internal structure of the air blowing component and the cleaning component of the present invention
[0039] In the figure: 1, processing table; 2, U-shaped frame; 3, rolling component; 31, electric push rod; 32, positioning rod; 33, receiving seat; 34, first rolling roller; 35, sliding frame; 36, second rolling roller; 37, drive motor; 4, grinding component; 41, L-shaped bracket; 42, mounting plate; 43, first working motor; 44, first grinding block; 45, second working motor; 46, second grinding block; 47, protective cover; 5, conveying and limiting component; 51, feeding frame; 52, electric push rod; 53, guiding frame; 54, feeding roller; 55, through groove; 56, positioning seat; 57, sliding plate; 58, connecting plate; 59, positioning shaft; 6, blanking plate; 7, U-shaped seat; 8, air blowing component; 81, fixed seat; 82, servo motor; 83, lead screw; 84, limiting rod; 85, sliding seat; 86, fixed frame; 87, air blowing pipe; 88, high-pressure air blowing pipe; 89, air inlet pipe; 810, first bevel gear; 9, cleaning component; 91, fixed table; 92, third bevel gear; 93, transmission shaft; 94, fourth bevel gear; 95, mounting seat; 96, transmission rod; 97, cleaning brush; 98, second bevel gear; 10, guiding plate; 11, slag collection frame; 12, collection frame. Detailed implementation mode
[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0041] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0042] Please refer to Figures 1 - 10 , the embodiments of the present invention provide a technical solution: an aluminum profile rolling and forming device and a using method, including a processing table 1, a U-shaped frame 2 is installed on the right side of the top wall of the processing table 1, a rolling assembly 3 is installed on the top wall of the U-shaped frame 2, conveying and limiting assemblies 5 are installed on both the left and right sides of the U-shaped frame 2, a grinding assembly 4 is installed on the outer wall of the conveying and limiting assembly 5 on the left side, a blanking plate 6 is fixedly installed on the side wall of the conveying and limiting assembly 5 on the left side, and two U-shaped seats 7 arranged symmetrically left and right are installed on the left side of the top wall of the processing table 1;
[0043] A blowing and cleaning assembly 8 for blowing debris on the surface of the rolled and formed aluminum profile is installed between the two U-shaped seats 7;
[0044] A cleaning brush assembly 9 for rolling and cleaning the surface of the rolled and formed aluminum profile is installed on the top wall of the blanking plate 6 and below the blowing and cleaning assembly 8, and the cleaning brush assembly 9 is meshed and connected with the blowing and cleaning assembly 8;
[0045] In this embodiment, through the mutual cooperation of each component, when rolling and forming the aluminum profile, it has good forming quality, and when the forming is completed, the surface is ground. Through the mutual cooperation of the blowing and cleaning assembly 8 and the cleaning brush assembly 9, the surface of the aluminum profile can be cleaned and has good finished product quality.
[0046] Specifically, the air-blowing assembly 8 includes two limiting rods 84 arranged symmetrically before and after. The two limiting rods 84 are located between the U-shaped seats 7 and fixedly connected to the U-shaped seats 7. Fixed seats 81 are fixedly connected to the top walls of the two U-shaped seats 7. Lead screws 83 are rotatably installed on one adjacent side of the two fixed seats 81. A servo motor 82 is fixedly installed on the side wall of the fixed seat 81 on the left side. The power shaft of the servo motor 82 penetrates through the fixed seat 81 through a bearing and is fixedly connected to the left end of the lead screw 83. The right end of the lead screw 83 penetrates through the corresponding fixed seat 81 through a bearing and is fixedly installed with a first bevel gear 810. The first bevel gear 810 is meshed and connected with the cleaning assembly 9;
[0047] In this implementation scheme, the servo motor 82 is electrically connected to an external power supply and a controller, and drives the lead screw 83 and the first bevel gear 810 to rotate. Then, the cleaning assembly 9 is driven to work synchronously through the first bevel gear 810.
[0048] Specifically, a sliding seat 85 is screwed and installed on the outer wall of the lead screw 83. The inner walls of the front and rear parts of the sliding seat 85 are slidably connected to the outer walls of the corresponding limiting rods 84. A fixed frame 86 is fixedly installed on the inner bottom wall of the sliding seat 85. A blowing pipe 87 is fixedly installed on the inner wall of the fixed frame 86. A plurality of high-pressure blowing pipes 88 are uniformly communicated with the bottom end of the blowing pipe 87. The rear end of the blowing pipe 87 penetrates through the fixed frame 86 through a leak-proof rubber sleeve and is connected to an air inlet pipe 89 through a flange. The air inlet pipe 89 is communicated with an external hair dryer;
[0049] In this implementation scheme, when the lead screw 83 rotates, it will drive the sliding seat 85 to move along the outer wall of the limiting rod 84, preventing the situation of position flipping or offset, and improving the overall stability during the movement. When the sliding seat 85 moves, it will drive the fixed frame 86, the blowing pipe 87 and the high-pressure blowing pipes 88 to move from left to right, blowing away the debris on the surface of the aluminum profile to avoid remaining on the surface. After the air blowing is completed, the sliding seat 85 returns to the left position through the reverse rotation of the lead screw 83.
[0050] Specifically, the cleaning assembly 9 includes two mounting seats 95 arranged symmetrically before and after. The two mounting seats 95 are both fixedly connected to the top wall of the blanking plate 6. Transmission rods 96 are rotatably installed on one adjacent side of the two mounting seats 95. Cleaning brushes 97 are fixedly installed on the front and rear parts of the outer wall of the transmission rod 96. A second bevel gear 98 is fixedly installed in the middle of the outer wall of the transmission rod 96. A fixed platform 91 is fixedly installed on the side wall of the U-shaped seat 7 on the right side. A transmission shaft 93 is rotatably installed in the middle of the inner wall of the fixed platform 91. A third bevel gear 92 is fixedly installed at the top end of the transmission shaft 93. The third bevel gear 92 is meshed and connected with the first bevel gear 810. A fourth bevel gear 94 is fixedly installed at the bottom end of the transmission shaft 93. The fourth bevel gear 94 is meshed and connected with the second bevel gear 98;
[0051] In this embodiment, the cleaning component 9 is mainly used in conjunction with the air-blowing component 8. The first bevel gear 810 drives the third bevel gear 92 and the transmission shaft 93 to rotate, thereby driving the second bevel gear 98, the transmission rod 96, and the cleaning brush 97 to rotate, cleaning the surface of the aluminum profile and cleaning up the adhering debris that is difficult to remove.
[0052] Specifically, the rolling component 3 includes an electric push rod 31. The electric push rod 31 is fixedly connected to the top wall of the U-shaped frame 2. Positioning rods 32 are fixedly installed on both the front and rear parts of the inner wall of the U-shaped frame 2. A receiving seat 33 is fixedly installed at the bottom of each of the two positioning rods 32. A first rolling roller 34 is rotatably installed on one adjacent side of each of the two receiving seats 33. A sliding frame 35 is slidably installed on the top of the outer walls of the two positioning rods 32. The side wall of the sliding frame 35 is fixedly connected to the grinding component 4. A second rolling roller 36 is rotatably installed inside the sliding frame 35. Driving motors 37 are fixedly installed on the outer side walls of the receiving seat 33 and the sliding frame 35. The front roller shafts of the second rolling roller 36 and the first rolling roller 34 respectively pass through the receiving seat 33 and the sliding frame 35 through bearings and are fixedly connected to the power shafts of the corresponding driving motors 37.
[0053] In this embodiment, when the rolling component 3 works, the electric push rod 31 pushes the sliding frame 35 and the second rolling roller 36 to move up and down, enabling the second rolling roller 36 to approach the first rolling roller 34 so that the distance between the two matches the thickness of the raw material to be processed. The driving motor 37 drives the second rolling roller 36 and the first rolling roller 34 to rotate in opposite directions to perform roll forming on the aluminum profile raw material.
[0054] Specifically, the conveying and limiting component 5 includes two symmetrically arranged feeding frames 51 on the left and right. Both of the two feeding frames 51 are fixedly connected to the outer side wall of the U-shaped frame 2. A number of feeding rollers 54 are evenly rotatably installed on the inner walls of the two feeding frames 51. Through grooves 55 are formed on the inner bottom walls of the two feeding frames 51. Positioning seats 56 are fixedly installed on the front and rear parts of the bottom walls of the two feeding frames 51 corresponding to the positions of the through grooves 55. A positioning shaft 59 is fixedly installed between the two positioning seats 56 on the same side. Sliding plates 57 are slidably installed on the front and rear parts of the outer walls of the two positioning shafts 59. A connecting plate 58 is fixedly installed between the two sliding plates 57 on the same side. The outer walls of a number of sliding plates 57 are slidably connected to the inner walls of the corresponding through grooves 55. Guide frames 53 are fixedly installed on the top walls of a number of sliding plates 57. The outer wall of the guide frame 53 on the left is fixedly connected to the grinding component 4. The bottom walls of a number of guide frames 53 are fitted with the outer walls of the corresponding feeding rollers 54.
[0055] In this embodiment, a conveying limit assembly 5 is provided. The sheet material of the aluminum profile is conveyed by a feeding roller 54. When the guiding frame 53 moves, it will drive the sliding plate 57 to slide on the inner wall of the through groove 55. The guiding frame 53 can adapt to the processing of aluminum profile materials with different widths. By adjusting the distance between the guiding frames 53, the feeding route is limited to prevent the problem of processing misalignment.
[0056] Specifically, electric push rods 52 are fixedly installed on the front and rear walls of the feeding frame 51 on the right side. The movable ends of the two electric push rods 52 slide through the feeding frame 51 and are fixedly connected to the corresponding guiding frame 53. The side wall of the feeding frame 51 on the left side is fixedly connected to the blanking plate 6. Guiding plates 10 are fixedly installed on the side walls of the two guiding frames 53 on the left side. The bottom walls of the two guiding plates 10 are slidably connected to the top wall of the blanking plate 6 and are in a shape that fits.
[0057] In this embodiment, the electric push rod 52 pushes the guiding frame 53 to adjust the distance in the inner wall of the feeding frame 51. When the guiding frame 53 on the left side moves, it will drive the guiding plate 10 to slide on the top wall of the blanking plate 6 to limit the route of the aluminum profile during discharging, preventing the problem of discharging deviation.
[0058] Specifically, the grinding assembly 4 includes two L-shaped brackets 41. Both of the two L-shaped brackets 41 are fixedly connected to the top wall of the sliding frame 35. The same mounting plate 42 is fixedly installed at the bottom ends of the two L-shaped brackets 41. A number of working motors one 43 are evenly and fixedly installed on the top wall of the mounting plate 42. The power shafts of the number of working motors one 43 pass through the mounting plate 42 through bearings and are fixedly installed with grinding blocks one 44. A protective cover 47 is fixedly installed on the top wall of the mounting plate 42.
[0059] In this embodiment, after the aluminum profile is rolled and formed, the working motor one 43 drives the grinding block one 44 to grind the top position of the aluminum profile to avoid the problem of burrs affecting the forming quality.
[0060] Specifically, working motors two 45 are fixedly installed on the outer walls of the two guiding frames 53 on the left side. The power shafts of the number of working motors two 45 pass through the corresponding guiding frames 53 through bearings and are fixedly installed with grinding blocks two 46. A collection box 12 is installed on the left side of the top wall of the blanking plate 6. A slag collection box 11 is installed on the top wall of the processing table 1 and below the grinding assembly 4.
[0061] In this embodiment, the working motor two 45 installed on the outside of the guiding frame 53 drives the grinding block two 46 to rotate to grind the burrs on the outer wall of the aluminum profile, making the surface of the aluminum profile smoother. The collection box 12 and the slag collection box 11 are mainly used for collecting metal waste chips.
[0062] An aluminum profile rolling and forming method includes the following steps:
[0063] S1. Electrically connect the electric push rod 31, drive motor 37, working motor 1 43, working motor 2 45, electric push rod 52, servo motor 82, and external blower through an external power supply and a controller. Place the aluminum profile raw material to be rolled and formed on the top positions of the feeding rack 51 and feeding rollers 54 on the right side. Push the sliding frame 35 to slide downward along the outer wall of the positioning rod 32 inside the inner wall of the U-shaped frame 2 through the electric push rod 31. Then, the sliding frame 35 drives the second rolling roller 36 and the corresponding drive motor 37 to move downward, so that the second rolling roller 36 approaches the position where the first rolling roller 34 is located, and the distance between the second rolling roller 36 and the first rolling roller 34 matches the thickness specification of the aluminum profile raw material;
[0064] S2. Then, push the guiding frame 53 to slide along the outer wall of the feeding roller 54 through the electric push rod 52, so that the guiding frame 53 gradually approaches the aluminum profile raw material. Limit the feeding width of the aluminum profile raw material through the guiding frame 53, so that the aluminum profile raw material moves along a predetermined route. When the guiding frame 53 moves, it will drive the sliding plate 57 to slide inside the through groove 55. The sliding plate 57 slides close along the outer wall of the positioning shaft 59 between the positioning seats 56, and the sliding plate 57 drives the sliding plate 57 on the left side to move along the outer wall of the corresponding positioning shaft 59 through the connecting plate 58. When the sliding plate 57 on the left side drives the guiding frame 53 to move inside the corresponding through groove 55, it will simultaneously drive the working motor 2 45 and the grinding block 2 46 to move to the discharging route of the aluminum profile raw material. When the guiding frame 53 on the left side moves, it will drive the guiding plate 10 to slide along the top position of the blanking plate 6, thereby limiting the discharging route after the aluminum profile raw material is processed;
[0065] S3. The feeding rollers 54 convey the aluminum profile raw material to the position between the second rolling roller 36 and the first rolling roller 34. Drive the drive motor 37 to drive the second rolling roller 36 and the first rolling roller 34 to rotate. The drive motors 37 on the receiving seat 33 and the sliding frame 35 rotate in opposite directions. The aluminum profile raw material is rolled and formed through the mutual rotation of the second rolling roller 36 and the first rolling roller 34 and is conveyed to the left;
[0066] S4. After the processed and formed aluminum profile raw material enters the feeding rollers 54 on the left side, since the sliding frame 35 will drive the L-shaped bracket 41, mounting plate 42, working motor 1 43, and grinding block 1 44 to move downward when moving downward. When the aluminum profile starts to be discharged after being rolled and formed, drive the grinding block 2 46 to polish the front and rear walls of the aluminum profile through the working motor 2 45, and at the same time, the working motor 1 43 drives the grinding block 1 44 to polish the top wall position of the aluminum profile. The debris generated by the polishing falls into the slag collection frame 11 through the through groove 55 and is collected uniformly;
[0067] S5. The polished aluminum profiles slide down through the blanking plate 6. The servo motor 82 and the external blower are started. When the servo motor 82 rotates, it drives the lead screw 83 to rotate. When the lead screw 83 rotates, it drives the first bevel gear 810 to rotate. Then, the third bevel gear 92 engaged with it rotates synchronously. The third bevel gear 92 drives the transmission shaft 93 and the fourth bevel gear 94 to rotate. The fourth bevel gear 94 drives the second bevel gear 98 engaged with it to rotate. When the second bevel gear 98 rotates, it drives the transmission rod 96 and the cleaning brush 97 to rotate between the mounting seats 95. Through the rotation of the cleaning brush 97, the surface of the aluminum profiles sliding down on the blanking plate 6 is cleaned by rolling, and the debris that is difficult to clean and adheres to it is loosened, facilitating the subsequent high-pressure air pipe 88 to blow away the debris.
[0068] S6. After the aluminum profiles slide to the left side of the blanking plate 6, as the lead screw 83 drives the sliding seat 85 to linearly move along the outer walls of the lead screw 83 and the limiting rod 84, the sliding seat 85 linearly moves from left to right. The sliding seat 85 drives the fixing frame 86, the air blowing pipe 87 and the high-pressure air pipe 88 to start blowing air from left to right. The external blower transports gas into the air blowing pipe 87 through the air inlet pipe 89 and discharges it through the high-pressure air pipe 88 to blow away the debris and impurities on the surface of the cleaned aluminum profiles. When the debris on the surface of the aluminum profiles blows to the right side and falls into the collection box 12, it can be collected uniformly.
[0069] Working principle of this device: Electrically connect the electric push rod 31, the drive motor 37, the first working motor 43, the second working motor 45, the electric push rod 52, the servo motor 82, and the external blower through an external power supply and a controller. Place the aluminum profile raw material to be rolled and formed at the top positions of the feeding frame 51 and the feeding roller 54 on the right side. The electric push rod 31 pushes the sliding frame 35 to slide downward along the outer wall of the positioning rod 32 inside the inner wall of the U-shaped frame 2. Then, the sliding frame 35 drives the second rolling roller 36 and the corresponding drive motor 37 to move downward, so that the second rolling roller 36 approaches the position where the first rolling roller 34 is located, and the distance between the second rolling roller 36 and the first rolling roller 34 matches the thickness specification of the aluminum profile raw material.
[0070] Subsequently, the electric push rod 52 is used to push the guiding frame 53 to slide along the outer wall of the feeding roller 54, so that the guiding frame 53 gradually approaches the aluminum profile raw material. The feeding width of the aluminum profile raw material is limited by the guiding frame 53, so that the aluminum profile raw material moves along a predetermined route. When the guiding frame 53 moves, it will drive the sliding plate 57 to slide inside the through groove 55. The sliding plate 57 slides close along the outer wall of the positioning shaft 59 between the positioning seats 56. And the sliding plate 57 drives the sliding plate 57 on the left side to move along the outer wall of the corresponding positioning shaft 59 through the connecting plate 58. When the sliding plate 57 on the left side drives the guiding frame 53 to move inside the corresponding through groove 55, it will simultaneously drive the working motor two 45 and the grinding block two 46 to move to the discharging route of the aluminum profile raw material. When the guiding frame 53 on the left side moves, it will drive the guiding plate 10 to slide along the top position of the blanking plate 6, thereby limiting the discharging route after the processing of the aluminum profile raw material;
[0071] The feeding roller 54 conveys the aluminum profile raw material to the position between the second rolling roller 36 and the first rolling roller 34. The driving motor 37 is driven to drive the second rolling roller 36 and the first rolling roller 34 to rotate. The driving motors 37 on the receiving seat 33 and the sliding frame 35 rotate in opposite directions. The aluminum profile raw material is rolled and formed through the mutual rotation of the second rolling roller 36 and the first rolling roller 34, and is conveyed to the left;
[0072] After the processed and formed aluminum profile raw material enters the left feeding roller 54, since the sliding frame 35 moves downward, it will drive the L-shaped bracket 41, the mounting plate 42, the working motor one 43 and the grinding block one 44 to move downward. When the aluminum profile starts to discharge after rolling and forming, the working motor two 45 drives the grinding block two 46 to polish the front and rear walls of the aluminum profile, and at the same time the working motor one 43 drives the grinding block one 44 to polish the top wall position of the aluminum profile. The debris generated by the polishing falls into the slag collection frame 11 through the through groove 55 and is collected uniformly;
[0073] The polished aluminum profile slides down through the blanking plate 6. The servo motor 82 and the external blower are started. When the servo motor 82 rotates, it will drive the lead screw 83 to rotate. When the lead screw 83 rotates, it will drive the bevel gear one 810 to rotate, and then the bevel gear three 92 engaged with it will rotate synchronously. The bevel gear three 92 drives the transmission shaft 93 and the bevel gear four 94 to rotate. The bevel gear four 94 drives the bevel gear two 98 engaged with it to rotate. When the bevel gear two 98 rotates, it will drive the transmission rod 96 and the cleaning brush 97 to rotate between the mounting seats 95. Through the rotation of the cleaning brush 97, the surface of the aluminum profile sliding down on the blanking plate 6 is cleaned by rolling, and the debris attached and difficult to clean is loosened, which is convenient for the subsequent high-pressure air pipe 88 to blow away the debris;
[0074] After the aluminum profile slides to the left side of the blanking plate 6, as the screw rod 83 drives the slide 85 to move linearly along the outer wall of the screw rod 83 and the limit rod 84, the slide 85 moves linearly from left to right, and the slide 85 drives the fixing frame 86, the cleaning pipe 87 and the high-pressure blowing pipe 88 to start blowing from left to right. The external blower sends the conveying gas to the inside of the cleaning pipe 87 through the air inlet pipe 89, and discharges the gas through the high-pressure blowing pipe 88 to blow away the debris and impurities on the surface of the aluminum profile after cleaning. When the debris on the surface of the aluminum profile is blown to the right side, it falls into the inside of the collection frame 12 and can be collected uniformly.
[0075] According to the above-mentioned working process, the feeding route of the aluminum profile can be limited, and the raw materials of different thicknesses and widths can be adapted for processing, thereby improving the processing adaptability of the entire device. After the aluminum profile is rolled and formed, the burrs and burrs on its surface are polished. After the polishing is completed, the impurities remaining on the surface are cleaned through the linkage cooperation of the blowing component 8 and the brushing component 9, which facilitates the subsequent processing of the aluminum profile.
[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0077] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. An aluminum profile rolling forming device, comprising a processing table (1), characterized in that: On the right side of the top wall of the processing table (1), a U-shaped frame (2) is installed. On the top wall of the U-shaped frame (2), a rolling assembly (3) is installed. On both the left and right sides of the U-shaped frame (2), conveying and limiting assemblies (5) are installed. On the outer wall of the conveying and limiting assembly (5) on the left side, a grinding assembly (4) is installed. On the side wall of the conveying and limiting assembly (5) on the left side, a blanking plate (6) is fixedly installed. On the left side of the top wall of the processing table (1), two U-shaped seats (7) are symmetrically arranged left and right; Between the two U-shaped seats (7), a blowing and debris-removing assembly (8) is installed for blowing debris on the surface of the rolled aluminum profile by air; On the top wall of the blanking plate (6) and below the blowing and debris-removing assembly (8), a brushing assembly (9) is installed for rolling and brushing the surface of the rolled aluminum profile. The brushing assembly (9) is meshed and connected with the blowing and debris-removing assembly (8).
2. The aluminum profile rolling forming device according to claim 1, characterized in that: The blowing and debris-removing assembly (8) includes two limiting rods (84) symmetrically arranged front and back. The two limiting rods (84) are located between the U-shaped seats (7) and fixedly connected to the U-shaped seats (7). On the top walls of the two U-shaped seats (7), fixed seats (81) are fixedly connected. On one adjacent side of the two fixed seats (81), a lead screw (83) is rotatably installed. On the side wall of the fixed seat (81) on the left side, a servo motor (82) is fixedly installed. The power shaft of the servo motor (82) passes through the fixed seat (81) through a bearing and is fixedly connected to the left end of the lead screw (83). The right end of the lead screw (83) passes through the corresponding fixed seat (81) through a bearing and is fixedly installed with a bevel gear one (810). The bevel gear one (810) is meshed and connected with the brushing assembly (9).
3. An aluminum profile rolling and forming device according to claim 2, characterized in that: A sliding seat (85) is screwed on the outer wall of the lead screw (83). The inner walls of the front and rear parts of the sliding seat (85) are slidably connected to the outer walls of the corresponding limiting rods (84). On the inner bottom wall of the sliding seat (85), a fixed frame (86) is fixedly installed. Inside the fixed frame (86), a blowing pipe (87) is fixedly installed. The bottom end of the blowing pipe (87) is uniformly communicated with a number of high-pressure blowing pipes (88). The rear end of the blowing pipe (87) passes through the fixed frame (86) through a leak-proof rubber sleeve and is connected to an air inlet pipe (89) through a flange. The air inlet pipe (89) is communicated with an external blower.
4. The aluminum profile rolling forming device according to claim 1, characterized in that: The cleaning brush assembly (9) comprises two mounting seats (95) arranged symmetrically in front and back, and both mounting seats (95) are fixedly connected to the top wall of the blanking plate (6). A transmission rod (96) is rotatably mounted on the adjacent side of the two mounting seats (95), and a cleaning brush (97) is fixedly mounted on the front and rear parts of the outer wall of the transmission rod (96). A bevel gear 2 (98) is fixedly mounted in the middle of the outer wall of the transmission rod (96). A fixed platform (91) is fixedly mounted on the side wall of the U-shaped seat (7) on the right side, and a transmission shaft (93) is rotatably mounted in the middle of the inner wall of the fixed platform (91). A bevel gear 3 (92) is fixedly mounted on the top end of the transmission shaft (93), and the bevel gear 3 (92) is meshed with the bevel gear 1 (810). A bevel gear 4 (94) is fixedly mounted on the bottom end of the transmission shaft (93), and the bevel gear 4 (94) is meshed with the bevel gear 2 (98).
5. The aluminum profile rolling forming device according to claim 1, characterized in that: The rolling assembly (3) includes an electric push rod (31), the electric push rod (31) is fixedly connected to the top wall of the U-shaped frame (2), the front and rear parts of the inner wall of the U-shaped frame (2) are fixedly installed with positioning rods (32), the bottoms of the two positioning rods (32) are fixedly installed with receiving seats (33), the adjacent sides of the two receiving seats (33) are rotatably installed with a rolling roller (34), the tops of the outer walls of the two positioning rods (32) are slidably installed with a sliding frame (3 5), the side wall of the sliding frame (35) is fixedly connected to the grinding assembly (4), the inner wall of the sliding frame (35) is rotatably mounted with a second rolling roller (36), the outer side walls of the receiving seat (33) and the sliding frame (35) are fixedly mounted with a driving motor (37), and the front end roller shafts of the second rolling roller (36) and the first rolling roller (34) are fixedly connected to the corresponding power shafts of the driving motor (37) through the receiving seat (33) and the sliding frame (35) via bearings.
6. The aluminum profile rolling and forming device according to claim 1, characterized in that: The conveying limit assembly (5) comprises two feeding racks (51) arranged symmetrically on the left and right, the two feeding racks (51) are fixedly connected to the outer wall of the U-shaped rack (2), a plurality of feeding rollers (54) are evenly rotated and installed on the inner walls of the two feeding racks (51), a through slot (55) is provided on the inner bottom walls of the two feeding racks (51), and positioning seats (56) are fixedly installed at the front and rear parts of the bottom walls of the two feeding racks (51) and at positions corresponding to the through slots (55), and a positioning shaft (56) is fixedly installed between the two positioning seats (56) on the same side. 59), the front and rear parts of the outer walls of the two positioning shafts (59) are slidably mounted with slides (57), a connecting plate (58) is fixedly mounted between the two slides (57) on the same side, the outer walls of several slides (57) are slidably connected to the inner walls of the corresponding through grooves (55), the top walls of several slides (57) are fixedly mounted with guide frames (53), the outer wall of the guide frame (53) on the left side is fixedly connected to the grinding assembly (4), and the bottom walls of several guide frames (53) are matched with the outer walls of the corresponding feeding rollers (54).
7. An aluminum profile rolling and forming device according to claim 6, characterized in that: The front and rear walls of the feeding rack (51) on the right side are fixedly mounted with electric push rods (52), and the movable ends of the two electric push rods (52) slide through the feeding rack (51) and are fixedly connected to the corresponding guide racks (53). The side wall of the feeding rack (51) on the left side is fixedly connected to the blanking plate (6), and the side walls of the two guide racks (53) on the left side are fixedly mounted with guide plates (10), and the bottom walls of the two guide plates (10) are slidably connected to the top wall of the blanking plate (6) and the shapes thereof are matched.
8. An aluminum profile rolling and forming device according to claim 1, characterized in that: The grinding assembly (4) includes two L-shaped brackets (41), both of which are fixedly connected to the top wall of the sliding frame (35), and the bottom ends of the two L-shaped brackets (41) are fixedly installed with the same mounting plate (42), and the top wall of the mounting plate (42) is evenly fixedly installed with a plurality of working motors (43), and the power shafts of the plurality of working motors (43) pass through the mounting plate (42) through bearings and are fixedly installed with grinding blocks (44), and the top wall of the mounting plate (42) is fixedly installed with a protective cover (47).
9. An aluminum profile rolling and forming device according to claim 6, characterized in that: The outer walls of the two guide frames (53) on the left side are fixedly mounted with working motors 2 (45), and the power shafts of several working motors 2 (45) pass through the corresponding guide frames (53) through bearings and are fixedly mounted with grinding blocks 2 (46). A collecting frame (12) is mounted on the left side of the top wall of the blanking plate (6), and a slag collecting frame (11) is mounted on the top wall of the processing table (1) and below the grinding assembly (4).
10. A method for rolling and forming aluminum profiles, according to any one of claims 1-9, an aluminum profile rolling and forming device, characterized in that: The following steps are included: S1, electrically connecting the electric push rod (31), the drive motor (37), the working motor 1 (43), the working motor 2 (45), the electric push rod (52), the servo motor (82), and the external blower through an external power supply and a controller, placing the aluminum profile material to be rolled and formed on the top of the feeding rack (51) and the feeding roller (54) on the right side, pushing the sliding rack (35) to slide downward along the outer wall of the positioning rod (32) in the inner wall of the U-shaped rack (2) through the electric push rod (31), and then the sliding rack (35) drives the rolling roller 2 (36) and the corresponding drive motor (37) to move downward, so that the rolling roller 2 (36) is close to the position of the rolling roller 1 (34), so that the distance between the rolling roller 2 (36) and the rolling roller 1 (34) matches the thickness specification of the aluminum profile material; S2. Then, the electric push rod (52) is used to push the guiding frame (53) to slide along the outer wall of the feeding roller (54), so that the guiding frame (53) gradually approaches the aluminum profile raw material. The feeding width of the aluminum profile raw material is limited by the guiding frame (53), so that the aluminum profile raw material moves along a predetermined route. When the guiding frame (53) moves, it will drive the sliding plate (57) to slide on the inner wall of the through groove (55). The sliding plate (57) slides close along the outer wall of the positioning shaft (59) between the positioning seats (56), and the sliding plate (57) drives the left sliding plate (57) to move on the outer wall of the corresponding positioning shaft (59) through the connecting plate (58). When the left sliding plate (57) drives the guiding frame (53) to move in the inner wall of the corresponding through groove (55), it will simultaneously drive the working motor two (45) and the grinding block two (46) to move to the discharging route of the aluminum profile raw material. When the left guiding frame (53) moves, it will drive the guiding plate (10) to slide along the top position of the blanking plate (6), thereby limiting the discharging route after the processing of the aluminum profile raw material; S3. The feeding roller (54) conveys the aluminum profile raw material to the position between the second rolling roller (36) and the first rolling roller (34). The driving motor (37) is driven to drive the second rolling roller (36) and the first rolling roller (34) to rotate. The driving motors (37) on the receiving seat (33) and the sliding frame (35) rotate in opposite directions. The aluminum profile raw material is roll-formed through the mutual rotation of the second rolling roller (36) and the first rolling roller (34) and is conveyed to the left; S4. After the processed and formed aluminum profile raw material enters the left feeding roller (54), since the sliding frame (35) will drive the L-shaped bracket (41), the mounting plate (42), the working motor one (43) and the grinding block one (44) to move downward when it moves downward. When the aluminum profile starts to be discharged after being roll-formed, the working motor two (45) is used to drive the grinding block two (46) to polish the front and rear walls of the aluminum profile, and at the same time, the working motor one (43) drives the grinding block one (44) to polish the top wall of the aluminum profile. The debris generated by the polishing falls into the slag collection frame (11) through the through groove (55) and is collected uniformly; S5. The polished aluminum profiles slide downward through the blanking plate (6). The servo motor (82) and the external blower are started. When the servo motor (82) rotates, it drives the lead screw (83) to rotate. When the lead screw (83) rotates, it drives the first bevel gear (810) to rotate, and then the third bevel gear (92) meshed with it rotates synchronously. The third bevel gear (92) drives the transmission shaft (93) and the fourth bevel gear (94) to rotate. The fourth bevel gear (94) drives the second bevel gear (98) meshed with it to rotate. When the second bevel gear (98) rotates, it drives the transmission rod (96) and the cleaning brush (97) to rotate between the mounting seats (95). Through the rotation of the cleaning brush (97), the surface of the aluminum profiles sliding down on the blanking plate (6) is cleaned by rolling, and the debris that is difficult to clean and adheres to it is loosened, facilitating the subsequent high-pressure blowpipe (88) to blow away the debris. S6. When the aluminum profiles slide to the left side of the blanking plate (6), as the lead screw (83) drives the sliding seat (85) to linearly move along the outer walls of the lead screw (83) and the limit rod (84), the sliding seat (85) linearly moves from left to right. The sliding seat (85) drives the fixed frame (86), the air blowing pipe (87) and the high-pressure blowpipe (88) to start blowing air from left to right. The external blower transports gas into the air blowing pipe (87) through the air inlet pipe (89) and discharges it through the high-pressure blowpipe (88) to blow away the debris and impurities on the surface of the cleaned aluminum profiles. When the debris on the surface of the aluminum profiles blows to the right side, it falls into the collection box (12) and can be collected uniformly.