Cantilever crane structure coating process production line

Abstract

The utility model discloses a coating process production line for a cantilever crane structure. The coating process production line comprises a feeding station, a shot blasting station, a shot cleaning station, a vitrification pretreatment station, a water blowing station, a moisture drying station, a cooling station, a shielding station, a powder spraying station, a buffering station, a powder drying station, a forced cooling station and a discharging station which are sequentially connected in series through a conveying system, the production line is in a U shape, a cooling station is located at the bending position, a transverse power and free system is arranged on the cooling station, and other stations are located on two parallel lines. The whole production line is compact in layout, small in occupied area and high in line body use efficiency; and powder coating and an electrostatic spraying process are used, so that the device is more suitable for the tubular structural member of the arm support, and the spraying process cost is reduced while the spraying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crane coating, in particular to a boom structure coating process production line. Background Art

[0002] The boom structure is a crucial component of crawler cranes, bearing the load and comprising the largest number of major structural components. With the exception of the boom structure, which is primarily welded from pipes, the rest of the crawler crane's components are essentially welded from sheet metal. Currently, crawler cranes are painted using a mixed-line production process, coating both sheet metal and pipes on the same production line. Because mixed-line painting lines require the highest number of workstations, the most complex processes, and the largest possible length, width, and height, they occupy a large area and require extensive equipment, resulting in significant resource waste and high construction costs. The current painting line process follows: loading - degreasing - shielding - shot blasting - cleaning - primer spraying - drying - sanding - puttying - sanding - topcoat spraying - drying - unloading. The "sanding - puttying - sanding" step is redundant for the boom structure. Therefore, the mixed production of boom components leads to unstable production cycles, reduced production efficiency, and reduced equipment utilization.

[0003] In addition, the existing process uses ordinary air spray guns and liquid paint during the spraying process. The paint liquid is converted into mist particles by the air pressure in the spray gun, and then dispersed in the air, and finally falls on the workpiece to form a liquid paint film, which is then dried to form a final dry paint film. However, when pipes are sprayed with liquid paint, the paint mist sprayed by the air spray gun cannot fully adhere to the surface of the pipe. Figure 8 As shown, compared to sheet metal components, pipe components have lower paint utilization rates. Generally, the paint utilization rate for smaller diameter pipes is around 30%, while for larger diameter pipes it can reach 35%-40%. Furthermore, paint particles dropped during the spraying process cannot be recycled, resulting in paint waste and environmental pressure. Utility Model Content

[0004] Purpose of the invention: In view of the shortcomings of the existing mixed-line production of coating processes, such as large production line footprint, low paint utilization rate, low equipment utilization rate, and thus high product production costs, the utility model provides a coating process production line with an arm structure.

[0005] Technical solution: To solve the above problems, the utility model adopts a boom structure coating process production line, including a loading station, a shot blasting station, a shot cleaning station, a ceramic pre-treatment station, a water blowing station, a moisture drying station, a cooling station, a shielding station, a powder spraying station, a buffer station, a powder drying station, a forced cooling station, and a unloading station, which are connected in series through a conveying system. The production line is U-shaped, with the cooling station located at the bend. A horizontal accumulation system is provided on the cooling station, and the other stations are located on two parallel lines.

[0006] The shot blasting station is used to remove rust on the surface of the workpiece, the shot cleaning station is used to clean dust on the surface of the workpiece, the ceramic pre-treatment station is used to ceramicize the workpiece, the water blowing station is used to blow off the liquid on the surface of the workpiece, the moisture drying station is used to dry the moisture on the surface of the workpiece, the cooling station is used to cool the workpiece, the shielding station is used to shield the workpiece, the powder spraying station is used to spray the workpiece, the powder spraying station uses powder coating and electrostatic spraying technology for spraying, the buffer station is used to balance the production rhythm, the powder drying station is used to dry the spray layer, and the strong cooling station is used to cool the workpiece surface.

[0007] Furthermore, the ceramic pretreatment station includes a degreasing station, a water washing station, a ceramic station, and a pure water washing station connected in sequence. The degreasing station, water washing station, ceramic station, and pure water washing station all have independent forward and backward movement functions. A pure water preparation device and a liquid medicine adding system are provided on one side of the ceramic pretreatment station.

[0008] Furthermore, the shot blasting station, shot cleaning station, ceramic pre-treatment station, water blowing station, moisture drying station, cooling station, shielding station, powder spraying station, buffer station, powder drying station, and forced cooling station are all equipped with stoppers.

[0009] Furthermore, the powder drying station includes an infrared drying station, a first hot air circulation station, and a second hot air circulation station.

[0010] Furthermore, the conveying system is a heavy-duty accumulation chain system, which includes a main chain connecting each workstation in series and a loading trolley suspended on the main chain, and the main chain is a heavy-duty fast chain.

[0011] Furthermore, the shot blasting station is provided with a shot blasting auxiliary chain, which is a slow chain. When the workpiece enters the shot blasting station, the workpiece is switched from the main chain to the shot blasting auxiliary chain, and is switched back to the main chain after the workpiece is processed.

[0012] Furthermore, a powder spraying slow chain is provided on the powder spraying station. When the workpiece enters the powder spraying station, the workpiece is switched from the main chain to the powder spraying slow chain, and is switched back to the main chain after the workpiece is processed.

[0013] Furthermore, a grating scanning device is provided at one end of the powder spraying station close to the shielding station.

[0014] Furthermore, a loading battery trolley is provided at the loading end of the loading station, and mobile climbing vehicles for loading are provided on both sides of the loading station. A lowering battery trolley is provided at the lowering end of the unloading station, and mobile climbing vehicles for unloading are provided on both sides of the unloading station.

[0015] Furthermore, a maintenance station is provided between the unloading station and the unloading battery vehicle.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) the overall production line layout is compact, the floor space is small, and the line utilization efficiency is high; (2) the use of powder coating and electrostatic spraying technology is more suitable for the tubular structural parts of the boom, which improves the spraying efficiency while reducing the cost of the spraying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the arm structure coating process production line of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the loading station, shot blasting station and shot cleaning station of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the ceramic pre-treatment station of the utility model;

[0020] Figure 4 This is a schematic diagram of the cooling station structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the powder spraying station structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the powder drying station of the utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the unloading station and maintenance station of the utility model;

[0024] Figure 8 It is a schematic diagram of the spraying process of the prior art;

[0025] Figure 9 This is a schematic diagram of the spraying process of the utility model. DETAILED DESCRIPTION

[0026] like Figures 1 to 7 As shown, a boom-structured coating production line in this embodiment includes a loading station 2, a shot blasting station 3, a shot cleaning station 4, a ceramic pre-treatment station 5, a water blowing station 6, a moisture drying station 7, a cooling station 8, a shielding station 9, a powder spraying station 10, a buffer station 11, a powder drying station 12, a forced cooling station 13, a loading station 14, and a maintenance station 15, all connected in series via a heavy-duty accumulation and release chain system. A loading battery trolley 1 is provided at the loading end of loading station 2, and mobile loading platforms 18 are located on both sides of loading station 2. A loading battery trolley 16 is provided at the lower end of maintenance station 15, and mobile loading platforms 30 are located on both sides of unloading station 14. The heavy-duty accumulation and release chain system includes a main chain 17 connecting the stations in series, and a loading trolley suspended from the main chain 17. The production line is U-shaped, with the cooling station 8 located at the bend and the other stations located on two parallel lines.

[0027] The functions of each station are as follows: loading station 2 is used for loading workpieces, shot blasting station 3 is used to remove rust on the surface of workpieces, shot cleaning station 4 is used to clean dust on the surface of workpieces, ceramic pre-treatment station 5 is used to ceramicize the workpiece, water blowing station 6 is used to blow off liquid on the surface of workpieces, moisture drying station 7 is used to dry moisture on the surface of workpieces, cooling station 8 is used to cool the workpiece, shielding station 9 is used to shield the workpiece, powder spraying station 10 is used to spray the workpiece, buffer station 11 is used to balance the production rhythm, powder drying station 12 is used to dry the spray layer, strong cooling station 13 is used to cool the surface of workpieces, unloading station 14 is used to unload workpieces, and maintenance station 15 is used to repair and maintain the loading trolley to ensure safe and stable operation of the equipment and equipment utilization.

[0028] The shot blasting station 3 is provided with a shot blasting auxiliary chain 19, which is a slow chain. When the workpiece enters the shot blasting station 3, the workpiece is switched from the main chain 17 to the shot blasting auxiliary chain 19, and the workpiece is switched back to the main chain 17 after processing. Compared with the traditional phosphating pre-treatment process, the ceramic pre-treatment process is more energy-saving and environmentally friendly. The ceramic pre-treatment station 5 of the utility model includes a degreasing station 20, a water washing station 21, a ceramic station 22, and a pure water washing station 23 connected in sequence. The degreasing station 20, the water washing station 21, the ceramic station 22, and the pure water washing station 23 all have independent forward and backward movement functions, so that each station can achieve a short distance forward or backward movement, ensuring that the workpiece has sufficient cleaning time and sufficient reaction time with the ceramic liquid at the station, without increasing the number of stations or the length of the line, thereby reducing construction cost investment. Pure water preparation equipment and a liquid medicine addition system 24 are installed on one side of the ceramic pretreatment station 5. Placing these equipment and systems nearby reduces the length of the liquid medicine and pure water pipelines, saving costs. The water blowing station 6 features both automatic and manual water blowing functions, allowing for flexible switching. The cooling station 8 utilizes a horizontal accumulation system 31 to allow the production line to turn, enabling it to simultaneously perform three functions: turning the line, cooling the workpiece, and temporarily storing the workpiece. This maximizes space utilization and reduces line construction costs.

[0029] The powder spraying station 10 is provided with a powder spraying slow chain 25. When the workpiece enters the powder spraying station 10, the workpiece is switched from the main chain 17 to the powder spraying slow chain 25. After the workpiece is processed, it is switched back to the main chain 17. The powder spraying station 10 is provided with two powder spraying chambers, which adopt powder coating and electrostatic spraying process for spraying. Figure 9As shown, this process allows the powder to be automatically adsorbed on the surface of the workpiece. Compared with the use of ordinary air spray guns and liquid paints, powder coatings are more environmentally friendly, the coating price is lower, and there is no need to invest in large-scale VOCS exhaust gas treatment equipment required for liquid paints, which is lower in cost and greatly reduces the cost of the spraying process. In addition, the spraying process of the present invention is more suitable for the tubular structural parts of the boom, effectively improving the utilization rate of the coating; a powder recovery system is set on the powder spraying station 10 to further improve the powder utilization rate and reduce the total cost of workpiece coating. A grating scanning device 26 is provided at one end of the powder spraying station 10 close to the shielding station 9 to automatically identify the shape of the boom structural parts, cooperate with the powder spraying robot for automatic spraying, reduce labor input, realize automated production, and improve production efficiency. The powder spraying station 10 is equipped with automatic powder spraying and manual powder spraying functions at the same time. Manual work can make up for the weak parts that the automatic spraying equipment cannot spray, thereby ensuring the quality of spraying.

[0030] The powder drying station 12 includes an infrared drying station 27, a first hot air circulation station 28, and a second hot air circulation station 29. There is no isolation between the three stations. The surface of the workpiece is first quickly heated to the curing temperature by infrared drying, and then the curing temperature of the workpiece is maintained by hot air circulation, which effectively reduces the energy consumption of the drying process. The strong cooling station 13 is also divided into two sub-stations with the same function to fully cool the workpiece. In addition, the shot blasting station 3, the shot cleaning station 4, the ceramic pre-treatment station 5, the water blowing station 6, the moisture drying station 7, the cooling station 8, the shielding station 9, the powder spraying station 10, the buffer station 11, the powder drying station 12, and the strong cooling station 13 are all equipped with a stopper. The workpiece can be stopped at the station for processing. The beat can be flexibly adjusted according to the size of the arm structure to improve the utilization rate of the line and reduce the running length of the line.

[0031] During processing, workpieces pass through each station in sequence for corresponding processing. The overall production line layout is compact, occupies a small area, and has high line efficiency. The use of powder coating and electrostatic spraying processes is more suitable for the tubular structure of the boom, improving spraying efficiency while reducing spraying process costs.

Claims

1. A boom structure coating process production line, characterized in that: The production line comprises a loading station (2), a shot blasting station (3), a shot cleaning station (4), a ceramic pre-treatment station (5), a water blowing station (6), a moisture drying station (7), a cooling station (8), a shielding station (9), a powder spraying station (10), a buffer station (11), a powder drying station (12), a forced cooling station (13), and a loading station (14) which are sequentially connected in series through a conveying system; the production line is U-shaped, the cooling station (8) is located at a bend, a horizontal accumulation system (31) is provided on the cooling station (8), and the other stations are located on two parallel lines; The shot blasting station (3) is used to remove rust from the surface of the workpiece, the shot cleaning station (4) is used to clean dust from the surface of the workpiece, the ceramic pre-treatment station (5) is used to ceramic the workpiece, the water blowing station (6) is used to blow off liquid from the surface of the workpiece, the moisture drying station (7) is used to dry moisture on the surface of the workpiece, the cooling station (8) is used to cool the workpiece, the shielding station (9) is used to shield the workpiece, the powder spraying station (10) is used to spray the workpiece, the powder spraying station (10) adopts powder coating and electrostatic spraying process for spraying, the buffer station (11) is used to balance the production rhythm, the powder drying station (12) is used to dry the sprayed layer, and the strong cooling station (13) is used to cool the surface of the workpiece.

2. The arm structure coating process production line according to claim 1, characterized in that: The ceramic pretreatment station (5) includes a degreasing station (20), a water washing station (21), a ceramic station (22), and a pure water washing station (23) connected in sequence. The degreasing station (20), the water washing station (21), the ceramic station (22), and the pure water washing station (23) all have independent forward and backward movement functions. A pure water preparation device and a liquid medicine adding system (24) are provided on one side of the ceramic pretreatment station (5).

3. The arm structure coating process production line according to claim 1, characterized in that: The shot blasting station (3), shot cleaning station (4), ceramic pre-treatment station (5), water blowing station (6), moisture drying station (7), cooling station (8), shielding station (9), powder spraying station (10), buffer station (11), powder drying station (12), and strong cooling station (13) are all provided with stoppers.

4. The arm structure coating process production line according to claim 1, characterized in that: The powder drying station (12) includes an infrared drying station (27), a first hot air circulation station (28), and a second hot air circulation station (29).

5. The arm structure coating process production line according to claim 1, characterized in that: The conveying system is a heavy-duty accumulation chain system, which includes a main chain (17) connecting each workstation in series and a loading trolley suspended on the main chain (17), wherein the main chain (17) is a heavy-duty fast chain.

6. The arm structure coating process production line according to claim 5, characterized in that: The shot blasting station (3) is provided with a shot blasting auxiliary chain (19), which is a slow chain. When a workpiece enters the shot blasting station (3), the workpiece is switched from the main chain (17) to the shot blasting auxiliary chain (19), and is switched back to the main chain (17) after the workpiece is processed.

7. The arm structure coating process production line according to claim 6, characterized in that: The powder spraying station (10) is provided with a powder spraying slow chain (25). When a workpiece enters the powder spraying station (10), the workpiece is switched from the main chain (17) to the powder spraying slow chain (25), and is switched back to the main chain (17) after the workpiece is processed.

8. The arm structure coating process production line according to claim 1, characterized in that: A grating scanning device (26) is provided at one end of the powder spraying station (10) close to the shielding station (9).

9. The arm structure coating process production line according to claim 1, characterized in that: The upper end of the loading station (2) is provided with a loading battery car (1), and both sides of the loading station (2) are provided with loading movable climbing cars (18). The lower end of the unloading station (14) is provided with a unloading battery car (16), and both sides of the unloading station (14) are provided with unloading movable climbing cars (30).

10. The arm structure coating process production line according to claim 9, characterized in that: An inspection station (15) is provided between the unloading station (14) and the unloading battery vehicle (16).

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