Plate conveying and cleaning device and process

Abstract

The invention provides a plate conveying and cleaning device and process. The plate conveying and cleaning device comprises a conveying frame, and a plurality of traction rollers are rotationally connected in the frame and driven by a driving motor; and a plurality of compression rollers are rotationally connected above the traction roller on the frame. Cleaning channels are rotationally connected to the upper side and the lower side of the traction roller in the middle of the frame, one side, facing the frame head opening, of each channel is provided with an opening, and scraping strips are arranged on the sides, close to each other, of the openings; a cleaning rotating shaft is rotationally connected into the channel and driven by a first rotating motor, and spiral blades and a cleaning brush are arranged outside the rotating shaft. The traction roller is erected on the side, close to the tail end, of the cleaning channel, and spray pipes are arranged on the upper side and the lower side of the traction roller. An oil scraping channel is arranged on the side, away from the cleaning channel, of the spray pipe, faces an opening of the traction roller, is internally provided with a cleaning rolling brush and is driven by a second rotating motor, an oil guide channel is arranged on the side, away from the spray pipe, in the channel, and an arc-shaped oil scraping strip is arranged on the opening edge of the oil guide channel. Impurities and oil stains on the surface of the plate can be fully removed, and follow-up machining is prevented from being affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plate processing equipment, and relates to a plate conveying and cleaning device and process. BACKGROUND

[0002] In the field of automobile manufacturing, the surface cleanliness of the plate as the basic raw material of the stamping forming process directly affects the forming quality of the subsequent stamping part and the service life of the die. Especially in the production process of high-precision cover parts such as vehicle body side plates, the plate will inevitably be contaminated with rolling oil, rust-proof oil, dust, metal debris and other environmental pollutants in the rolling, transportation and storage links. If these impurities are not effectively removed, they may scratch the surface of the die during the stamping process, and also easily cause uneven material flow, wrinkling or even cracking, which seriously affects the appearance and dimensional accuracy of the product.

[0003] Therefore, before the plate enters the stamping production line, it usually needs to be surface cleaned. At present, the non-water-based cleaning method is generally used in industry, that is, special cleaning oil is used to flush the surface of the plate to dissolve and remove oil stains and attached particles. Compared with water washing, this method has the advantages of not introducing water, avoiding secondary rust, and being compatible with the existing pre-painting process, and is widely used in high-end automobile plate processing.

[0004] However, the existing cleaning equipment mostly uses spray or immersion flushing structure, mainly relying on the flowability and solubility of the cleaning oil to achieve surface cleaning. For some stubborn impurities with strong adhesion (such as dry oil sludge and oxide particles), simple flushing cannot completely remove them, and they may still remain on the surface of the plate. In addition, a layer of cleaning oil film is often attached to the surface of the plate after flushing, which cannot be dried or volatilized in time and efficiently, not only affecting the uniformity of subsequent oiling or stamping lubrication, but also possibly absorbing new dust in the conveying process, causing secondary pollution. SUMMARY

[0005] The purpose of the present application is to provide a plate conveying and cleaning device and process, which can effectively remove impurities on the surface of the plate, and also effectively remove oil stains on the surface of the plate to avoid affecting subsequent processing.

[0006] To solve the above technical problems, the present application provides a plate conveying and cleaning device, which comprises a conveying frame, a plurality of traction rollers are rotatably connected in the conveying frame along the length direction of the conveying frame, a driving motor is installed on the conveying frame for driving the traction rollers to rotate, and a plurality of pressure rollers are rotatably connected above the traction rollers;

[0007] The middle part of the conveying frame is rotationally connected with cleaning channels on the upper and lower sides of the traction roller, each cleaning channel is opened towards one side of the conveying frame head, the two cleaning channel openings are arranged on the side close to each other and towards the conveying frame head, each cleaning channel is rotationally connected with a cleaning rotating shaft, the conveying frame is externally provided with a driving assembly for driving the rotation of the cleaning channel, each cleaning channel is rotationally connected with a cleaning rotating shaft, the conveying frame is externally provided with a first rotating motor for driving the rotation of the cleaning rotating shaft, each rotating shaft is externally provided with a spiral blade, and each spiral blade is externally provided with a spiral cleaning brush.

[0008] The conveying frame is transversely provided with a spray pipe on the side close to the tail end of the cleaning channel and on the upper and lower sides of the traction roller, the two spray pipes are provided with a plurality of washing nozzles distributed along the length direction and towards the traction roller, the conveying frame is provided with an oil scraping channel on the side away from the cleaning channel of each spray pipe, each oil scraping channel is opened towards the side of the traction roller towards the spray pipe, each oil scraping channel is rotationally connected with a cleaning roller brush, the conveying frame is externally provided with a second rotating motor for driving the rotation of the cleaning roller brush, each oil scraping channel is provided with an oil guide channel on the side away from the spray pipe, and one end of each oil guide channel is opened away from the traction roller and provided with an arc-shaped oil scraping strip matched with the corresponding cleaning roller brush.

[0009] The conveying frame is further provided with a recycling tank with an open upper end below the spray pipe, the upper part of the recycling tank is provided with a V-shaped flow guide plate, the upper side of the bottom of the flow guide plate is provided with a detachable filter cloth strip arranged along the length direction, a plurality of oil leakage holes are formed in the flow guide plate below the filter cloth strip, an oil discharge pipe is communicated with the lower part of one side of the recycling tank, valves are arranged on the oil discharge pipe, a high-pressure water pump is arranged outside the recycling tank, the inlet end of the high-pressure water pump is communicated with the bottom of the recycling tank, one end of each spray pipe is communicated with a flow guide pipe communicated with the outlet end of the high-pressure water pump, and one end of each oil scraping channel is connected with an oil guide pipe downwardly towards the recycling tank.

[0010] The application is further provided that each spray pipe is communicated with an oil receiving pipe, and valves are arranged on each oil receiving pipe.

[0011] The application is further provided that, in addition to the traction roller close to the tail end of the conveying frame, the end part of each traction roller is arranged with a transmission pulley outside the conveying frame, the adjacent transmission pulleys are driven by a belt, and the power output shaft of the driving motor is provided with a driving pulley.

[0012] The application is further provided that each driving assembly comprises two transmission turntables connected with one end of the corresponding cleaning channel respectively, two hydraulic telescopic rods installed outside the conveying frame, each transmission turntable is provided with a movable sliding hole arranged along the center direction thereof, and the telescopic shaft of each hydraulic telescopic rod is provided with a connecting sliding shaft in sliding connection with the corresponding movable sliding hole.

[0013] The application is further provided that each cleaning channel is provided with a rotating hole in rotation connection with the corresponding cleaning rotating shaft at the end away from the corresponding transmission turntable, and one end of each cleaning rotating shaft is connected with the power output shaft of the corresponding first rotating motor through the corresponding rotating hole.

[0014] The application is further provided to further comprise a dust collecting barrel, the upper end of the dust collecting barrel is provided with a negative pressure pump, a dust filter cover is arranged in the dust collecting barrel at the inlet end of the negative pressure pump, one end of each cleaning channel is communicated with a negative pressure hose in communication with the upper part of the dust collecting barrel, a cleaning opening is formed in one side of the dust filter cover, and a sealing cover is hinged to one side of the cleaning opening.

[0015] The application is further provided that the conveying frame is provided with a silica gel oil scraping strip on the upper and lower sides of the traction roller on the side of the oil scraping channel away from the cleaning channel, one side of each silica gel oil scraping strip is inclined away from the cleaning channel, and an oil receiving groove with an open upper end is arranged in the conveying frame below the silica gel oil scraping strip.

[0016] The application is further provided that the conveying frame is provided with a mounting frame on the side of the cleaning channel away from the oil scraping channel, and a laser distance sensor is mounted downwardly on the mounting frame.

[0017] The application further discloses a conveying and cleaning process of a plate, which comprises the following steps.

[0018] S1, placing the plate to be cleaned on the starting end of the conveying frame, starting the driving motor, and driving the traction roller to rotate by the driving motor, so that the plate is conveyed to the other end of the conveying frame by the rotation of the traction roller;

[0019] S2, when the plate enters the cleaning channel area, the driving assembly drives the cleaning channel to rotate, so that the scraping strips on the opening edges of the cleaning channel are in contact with the upper and lower sides of the plate respectively, the first rotating motor is started, the cleaning rotating shaft is driven to rotate by the first rotating motor, the spiral blades and the spiral cleaning brush on the cleaning rotating shaft are driven to rotate, and the upper and lower surfaces of the plate are preliminarily brushed;

[0020] S3, after the preliminary brushing, the plate continues to move forward and reaches the spray pipe area, at this time, the flushing nozzles on the spray pipe spray high-pressure cleaning oil to the surface of the plate, and the upper and lower sides of the plate are flushed;

[0021] S4, the washed plate enters the oil scraping channel area, the second rotating motor is started, the second rotating motor drives the cleaning roller brush to rotate, the cleaning roller brush absorbs the oil layer on the surface of the plate, and simultaneously, the arc-shaped oil scraping strip scrapes the cleaning oil on the cleaning roller brush into the oil guide channel during the rotation of the cleaning roller brush, so that the cleaning roller brush always maintains sufficient oil absorption capacity;

[0022] S5, during the cleaning process, the oil on the plate falls from the edge to the guide plate at the upper end of the recovery tank, the oil in each oil guide channel flows into the guide plate at the upper end of the recovery tank through the oil guide pipe, and after being filtered through the filter cloth strip, the cleaning oil flows into the recovery tank, the oil discharge pipe is opened to discharge the cleaning oil in the recovery tank, or the high-pressure water pump is started to circulate the cleaning oil in the recovery tank to the spray pipe, and the cleaning oil at the bottom of the recovery tank is used to circulate and wash the plate;

[0023] S6, finally, the dried and cleaned plate is output from the tail end of the conveying frame, and the whole cleaning process is completed.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] Firstly, the plate conveying and cleaning device of the present application significantly improves the surface treatment effect of the plate through a multi-stage cleaning mechanism. Firstly, in the cleaning channel stage, the combination design of the spiral blade and the spiral cleaning brush realizes three-dimensional brushing, wherein the spiral blade is responsible for peeling off large particle impurities, and the spiral cleaning brush removes small particle impurities by penetrating into the plate texture through dense bristles. This layered cleaning mode effectively solves the problem of insufficient treatment of stubborn stains in traditional equipment.

[0026] Secondly, in the washing link, the high-pressure oil curtain formed by the double spray pipe cross injection system can cover the entire surface of the plate, and the washing pressure is set to 0.8-1.2 MPa, which can ensure the permeability of the cleaning oil and avoid waste caused by excessive injection. The composite oil removal structure used in the oil scraping channel has a dual effect: the cleaning roller brush absorbs the surface oil film through capillary action, and the linear contact design of the arc-shaped oil scraping strip and the cleaning roller brush forms a dynamic extrusion effect, ensuring that the roller brush maintains the best oil absorption state.

[0027] Thirdly, the oil liquid recovery system realizes solid-liquid separation through the V-shaped guide plate, the filter cloth strip adopts a three-layer composite structure, the upper layer of coarse filter screen intercepts large particle impurities, the middle layer of melt-blown cloth filters micron-level particles, and the lower layer of activated carbon layer adsorbs organic pollutants. The high and low liquid level sensors arranged in the recovery tank can automatically start and stop the high-pressure water pump, and when the oil level reaches the high position, the circulation cleaning is started, and when the oil level reaches the low position, the fresh cleaning oil is supplemented, and this intelligent control mode effectively improves the utilization rate of the cleaning oil. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present application;

[0029] Figure 2 is Figure 1 is an enlarged view of A in

[0030] Figure 3 is mainly used to show the internal structure of the cleaning channel;

[0031] Figure 4 is used to show the position relationship of the spray pipe, the oil scraping channel and the traction roller;

[0032] Figure 5 is a sectional view used to show the cleaning roller brush in the oil scraping channel and the oil guide channel;

[0033] Figure 6 is used to show the oil leakage hole in the recovery tank;

[0034] Figure 7 is used to show the position relationship of the silica gel oil scraping strip, the oil receiving groove and the traction roller.

[0035] 1, conveying frame; 2, traction roller; 3, drive motor; 4, transmission pulley; 5, belt; 6, drive pulley; 7, compression roller; 8, cleaning channel; 9, scraping strip; 10, cleaning rotating shaft; 11, first rotating motor; 12, spiral blade; 13, spiral cleaning brush; 14, transmission turntable; 15, hydraulic telescopic rod; 16, movable sliding hole; 17, connecting sliding shaft; 18, mounting frame; 19, laser distance sensor; 20, negative pressure pump; 21, negative pressure hose; 22, sealing cover; 23, spray pipe; 24, flushing spray head; 25, oil scraping channel; 26, cleaning roller brush; 27, second rotating motor; 28, oil guide channel; 29, arc-shaped oil scraping strip; 30, recovery tank; 31, flow guide plate; 32, filter cloth strip; 33, oil leakage hole; 34, oil discharge pipe; 35, valve; 36, high-pressure water pump; 37, flow guide pipe; 38, oil guide pipe; 39, oil receiving pipe; 40, silica gel oil scraping strip; 41, oil receiving groove; 42, dust collecting bucket. DETAILED DESCRIPTION

[0036] The plate conveying and cleaning device and process of the present application are further described in detail below in combination with the drawings and specific examples. The advantages and features of the present application will be clearer according to the following description. It should be noted that the drawings are all very simplified and use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the embodiments of the present application. The same or similar reference numerals in the drawings represent the same or similar parts.

[0037] Example 1, refer to Figures 1-7The utility model provides a kind of conveying and cleaning device of board, including conveying frame 1, a plurality of traction rollers 2 are rotationally connected along its length direction distribution in conveying frame 1, a drive motor 3 for driving traction roller 2 rotation is installed on conveying frame 1, except the traction roller 2 near the tail end of conveying frame 1, the end of every traction roller 2 except is stretched out conveying frame 1 and is provided with a transmission pulley 4, it is driven between adjacent transmission pulley 4 by belt 5, the power output shaft of drive motor 3 is provided with a drive pulley 6, and drive pulley 6 is driven between transmission pulley 4 by belt 5.

[0038] The middle part of conveying frame 1 is rotationally connected with a cleaning channel 8 on the upper and lower sides of traction roller 2, every cleaning channel 8 is opened towards the side of the head of conveying frame 1, and the side of the opening of the two cleaning channels 8 close to each other is provided with a scraping strip 9 towards the direction of the head of conveying frame 1, so as to scrape the attachments on the upper and lower sides of the board into the cleaning channel. A cleaning shaft 10 is rotationally connected in each cleaning channel 8, two first rotation motors 11 are installed outside the conveying frame 1 for driving the cleaning shaft 10 to rotate, one end of each cleaning shaft 10 is connected with the power output shaft of the corresponding first rotation motor 11 through the corresponding rotating hole (not shown in the figure) opened at the end of each cleaning channel 8 away from the corresponding transmission disc 14, a spiral blade 12 is arranged outside each cleaning shaft, and a spiral cleaning brush 13 is arranged outside each spiral blade 12. When the spiral cleaning brush 13 rotates with the cleaning shaft 10, the scraped attachments can be conveyed along one end of the cleaning channel.

[0039] A driving assembly is arranged outside the conveying frame 1 for driving the cleaning channel 8 to rotate, each driving assembly includes two transmission discs 14 connected with one end of the corresponding cleaning channel 8 respectively, two hydraulic telescopic rods 15 installed outside the conveying frame 1, each transmission disc 14 is provided with a sliding hole 16 arranged along the center direction thereof, the telescopic shaft of each hydraulic telescopic rod 15 is provided with a connecting sliding shaft 17 slidably connected with the corresponding sliding hole 16, when the hydraulic telescopic rod 15 is telescoped, the transmission disc 14 can be driven to rotate by the connecting sliding shaft 17 moving along the sliding hole 16, and finally drive the cleaning channel 8 to rotate. A mounting frame 18 is arranged on the side of the cleaning channel 8 away from the oil scraping channel 25 of the conveying frame 1, and a laser distance sensor 19 is mounted downwardly on the mounting frame 18. When the laser distance sensor 19 detects that there is a board below, the hydraulic telescopic rod 15 is started to drive the transmission disc 14 to rotate, and the scraping strip 9 of the cleaning channel 8 is driven to rotate downwardly and contact the surface of the board.

[0040] It also includes a dust collection bin 42, with a negative pressure pump 20 installed at the upper end of the dust collection bin 42. A dust filter cover (not shown) is installed inside the dust collection bin 42 at the inlet end of the negative pressure pump 20. One end of each cleaning channel 8 is connected to a negative pressure hose 21 that is connected to the upper part of the dust collection bin 42. A cleaning port (not shown) is opened on one side of the dust filter cover. A sealing cover 22 is hinged to one side of the cleaning port. The operation of the negative pressure pump 20 can generate negative pressure inside the dust collection bin 42. The impurities transported to the end of the cleaning channel are drawn into the dust collection bin 42 by the negative pressure through the negative pressure hose 21.

[0041] On the side of the cleaning channel 8 near its tail end, the conveyor frame 1 has a spray pipe 23 arranged horizontally on both the upper and lower sides of the traction roller 2. Both spray pipes 23 have multiple flushing nozzles 24 arranged along their length direction towards the traction roller 2, and the flushing nozzles 24 spray cleaning oil onto the surface of the board. Each conveyor frame 1 has an oil scraping channel 25 on the side of each spray pipe 23 away from the cleaning channel 8. Each oil scraping channel 25 opens towards the side of the traction roller 2 facing the spray pipe 23. A cleaning roller brush 26 is rotatably connected inside each oil scraping channel 25. When the cleaning roller brush 26 rotates, it can continuously suck away the cleaning oil on the surface of the board. Two second rotating motors 27 are installed on the outside of the conveyor frame 1 to drive the cleaning roller brush 26 to rotate. Each oil scraping channel 25 has an oil guide channel 28 on the side away from the spray pipe 23. Each oil guide channel 28 opens at the end away from the traction roller 2, and an arc-shaped oil scraping strip 29 is provided on one side of its opening to cooperate with the corresponding cleaning roller brush 26. The arc-shaped oil scraping strip 29 continuously squeezes and scrapes away the cleaning oil on the rotating cleaning roller brush 26 to maintain sufficient oil suction capacity.

[0042] Inside the conveyor frame 1, below the nozzle 23, there is a recovery trough 30 with an open top. Inside the recovery trough 30, there is a V-shaped guide plate 31. On the upper side of the bottom of the guide plate 31, there is a detachable filter cloth strip 32 that runs along its length. The filter cloth strip 32 collects the particulate impurities washed down by the cleaning oil. After collecting enough particulate impurities, the filter cloth strip 32 can be replaced. The guide plate 31 has multiple oil leakage holes 33 on the lower side of the filter cloth strip 32. An oil drain pipe 34 is connected outwards from the lower side of the recovery tank 30. Each oil drain pipe 34 is equipped with a valve 35. A high-pressure water pump 36 is installed outside the recovery tank 30, with its inlet end connected to the bottom of the recovery tank 30. One end of each spray pipe 23 is connected to a guide pipe 37 connected to the outlet end of the high-pressure water pump 36. One end of each of the two oil scraping channels 25 is connected to an oil guide pipe 38 pointing downwards towards the recovery tank 30. Each oil guide channel 28 is connected to an oil guide pipe 38. The end of each spray pipe 23 furthest from the corresponding guide pipe 37 is connected outwards to an oil receiving pipe 39. Each oil receiving pipe 39 is equipped with a valve 35, which can be used directly for rinsing and replenishing insufficient cleaning oil in the recovery tank 30.

[0043] On the side of the oil scraping channel 25 away from the cleaning channel 8, a silicone oil scraping strip 40 is horizontally arranged on both the upper and lower sides of the traction roller 2 on the conveyor frame 1. Each silicone oil scraping strip 40 is inclined away from the cleaning channel 8 on the side facing the traction roller 2. An oil receiving groove 41 with an open top is provided below the silicone oil scraping strip 40 in the conveyor frame 1. The silicone oil scraping strip 40 further scrapes away the cleaning oil on the surface of the board, so that less cleaning oil remains on the surface. Although absolute drying cannot be achieved, it has no impact on subsequent stamping.

[0044] Example 2, a conveying and cleaning process for sheet metal, based on a sheet metal conveying and cleaning device of Example 1, includes the following steps:

[0045] First, place the board to be cleaned at the starting end of the conveyor frame 1, start the drive motor 3, drive the drive pulley 6 to rotate, drive the drive pulley 6 to rotate through the belt 5 to drive the transmission pulley 4 to rotate, which in turn causes the traction roller 2 to rotate. The traction roller 2 and the pressure roller 7 work together to smoothly convey the board to the other end of the conveyor frame 1.

[0046] When the laser distance sensor 19 detects a material passing below, the hydraulic telescopic rod 15 is activated. The hydraulic telescopic rod 15 extends and retracts, driving the transmission turntable 14 to rotate via the connecting sliding shaft 17 and the movable sliding hole 16. The transmission turntable 14 drives the cleaning channel 8 to rotate, causing the scraper strips 9 at the edge of the cleaning channel 8 opening to contact the upper and lower sides of the material. Simultaneously, the first rotating motor 11 is activated, driving the cleaning shaft 10 to rotate. The spiral blades 12 and spiral cleaning brushes 13 on the cleaning shaft 10 rotate accordingly, performing preliminary scrubbing on the upper and lower surfaces of the material and conveying the scraped-off material along one end of the cleaning channel 8. During this process, the negative pressure pump 20 is activated, creating negative pressure inside the dust collection bin 42. Dust and impurities in the cleaning channel 8 are sucked into the dust collection bin 42 through the negative pressure hose 21. The sealing cover 22 can be opened periodically to clean the dust filter cover through the cleaning port.

[0047] After the initial scrubbing, the board continues to move forward and reaches the area of ​​the spray nozzle 23. At this time, the rinsing nozzle 24 on the spray nozzle 23 sprays high-pressure cleaning oil onto the surface of the board to rinse the top and bottom sides of the board.

[0048] After rinsing, the board enters the oil scraping channel 25 area. The second rotating motor 27 is started, which drives the cleaning roller brush 26 to rotate. The cleaning roller brush 26 sucks away the oil layer on the surface of the board. At the same time, the arc-shaped oil scraping strip 29 scrapes the cleaning oil on the cleaning roller brush 26 into the oil guide channel 28 during the rotation of the cleaning roller brush 26, so that the cleaning roller brush 26 always maintains sufficient oil suction capacity.

[0049] During the cleaning process, the oil on the board falls from the edge into the guide plate 31 at the top of the recovery tank 30. The oil in each oil guide channel 28 flows into the guide plate 31 at the top of the recovery tank 30 through the oil guide pipe 38. After being filtered by the filter cloth strip 32, the cleaning oil flows into the recovery tank 30. Opening the valve 35 on the drain pipe 34 can drain the cleaning oil in the recovery tank 30, or the high-pressure water pump 36 can be started to circulate the cleaning oil in the recovery tank 30 into the spray pipe 23, using the cleaning oil at the bottom of the recovery tank 30 to circulate and rinse the board.

[0050] Finally, the board continues to move forward, passing through the silicone scraper 40, which further scrapes away the cleaning oil on the surface of the board, leaving less cleaning oil residue. The cleaned and dried board is then output from the tail end of the conveyor frame 1, completing the entire cleaning process.

[0051] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0052] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A conveying and cleaning device for sheet metal, comprising a conveying frame (1), wherein a plurality of traction rollers (2) distributed along its length are rotatably connected within the conveying frame, and a drive motor (3) for driving the traction rollers to rotate is mounted on the conveying frame, characterized in that, The conveyor frame is rotatably connected to multiple pressure rollers (7) above the traction roller. The middle part of the conveyor frame is rotatably connected to the upper and lower sides of the traction roller with cleaning channels (8). Each cleaning channel is open on the side facing the head opening of the conveyor frame. The sides of the two cleaning channels that are close to each other are provided with scraper strips (9) facing the head opening of the conveyor frame. A drive assembly for driving the cleaning channels to rotate is provided outside the conveyor frame. A cleaning shaft (10) is rotatably connected inside each cleaning channel. A first rotating motor (11) for driving the cleaning shaft to rotate is installed outside the conveyor frame. A spiral blade (12) is provided outside each rotating shaft. A spiral cleaning brush (13) is provided outside each spiral blade. The conveyor frame has spray pipes (23) arranged laterally on both the upper and lower sides of the traction roller on the side of the cleaning channel near its tail end. Both spray pipes have multiple flushing nozzles (24) distributed along their length direction in the direction of the traction roller. The conveyor frame has an oil scraping channel (25) on the side of each spray pipe away from the cleaning channel. Each oil scraping channel opens towards the side of the traction roller facing the spray pipe. A cleaning roller brush (26) is rotatably connected in each oil scraping channel. A second rotating motor (27) for driving the cleaning roller brush is installed outside the conveyor frame. An oil guide channel (28) is arranged on the side of each oil scraping channel away from the spray pipe. Each oil guide channel opens at the end away from the traction roller, and an arc-shaped oil scraping strip (29) that cooperates with the corresponding cleaning roller brush is arranged on one side of its opening.

2. The sheet metal conveying and cleaning device according to claim 1, characterized in that, The conveyor frame has a recovery trough (30) with an open top located below the nozzle. A V-shaped guide plate (31) is provided in the upper part of the recovery trough. A detachable filter cloth strip (32) is provided on the upper side of the bottom of the guide plate along its length. Multiple oil leakage holes (33) are provided on the lower side of the filter cloth strip on the guide plate. An oil drain pipe (34) is connected to the lower part of one side of the recovery trough. A valve (35) is provided on the oil drain pipe. A high-pressure water pump (36) is provided outside the recovery trough. The inlet end of the high-pressure water pump is connected to the bottom of the recovery trough. One end of each nozzle is connected to a guide pipe (37) that is connected to the outlet end of the high-pressure water pump. One end of each of the two oil scraping channels is connected to an oil guide pipe (38) that faces downward toward the recovery trough. Each oil guide channel is connected to the oil guide pipe.

3. The sheet metal conveying and cleaning device according to claim 2, characterized in that, Each nozzle is connected to an oil inlet pipe (39), and each oil inlet pipe is equipped with a valve.

4. The sheet material conveying and cleaning device according to claim 2, characterized in that, Except for the traction roller near the tail end of the conveyor frame, the end of each of the other traction rollers extends out of the conveyor frame and is provided with a transmission pulley (4). Adjacent transmission pulleys are driven by a belt (5). The power output shaft of the drive motor is provided with a drive pulley (6). The drive pulley and the transmission pulley are driven by a belt.

5. The sheet metal conveying and cleaning device according to claim 2, characterized in that, Each drive assembly includes two drive turntables (14) respectively connected to one end of the corresponding cleaning channel, and two hydraulic telescopic rods (15) installed on the outside of the conveyor frame. Each drive turntable is provided with a movable sliding hole (16) arranged along its center direction, and each hydraulic telescopic rod (15) is provided with a connecting sliding shaft (17) that is slidably connected to the corresponding movable sliding hole.

6. The sheet metal conveying and cleaning device according to claim 5, characterized in that, Each cleaning channel has a rotating hole at the end away from the corresponding drive turntable, which is rotatably connected to the corresponding cleaning shaft. One end of each cleaning shaft passes through the corresponding rotating hole and is connected to the power output shaft of the corresponding first rotating motor.

7. The sheet metal conveying and cleaning device according to claim 2, characterized in that, It also includes a dust collection bin (42), a negative pressure pump (20) is installed at the upper end of the dust collection bin (42), a dust filter cover is provided inside the dust collection bin (42) at the inlet end of the negative pressure pump, and a negative pressure hose (21) connected to the upper part of the dust collection bin (42) is connected to one end of each cleaning channel. A cleaning port is provided on one side of the dust filter cover, and a sealing cap (22) is hinged to one side of the cleaning port.

8. The sheet metal conveying and cleaning device according to claim 2, characterized in that, The conveyor frame has silicone oil scraping strips (40) arranged laterally on both the upper and lower sides of the traction roller on the side of the oil scraping channel away from the cleaning channel. Each silicone oil scraping strip is inclined away from the cleaning channel on the side facing the traction roller. An oil receiving groove (41) with an open top is provided below the silicone oil scraping strip inside the conveyor frame.

9. The sheet metal conveying and cleaning device according to claim 2, characterized in that, The conveyor frame is provided with a mounting bracket (18) on the side of the cleaning channel away from the oil scraping channel, and a laser distance sensor (19) is mounted downward on the mounting bracket.

10. A conveying and cleaning process for sheet metal, using the sheet metal conveying and cleaning device according to any one of claims 2-9, characterized in that, Includes the following steps: S1. Place the board to be cleaned at the starting end of the conveyor frame, start the drive motor, the drive motor drives the traction roller to rotate, and the rotation of the traction roller transports the board to the other end of the conveyor frame; S2. When the board enters the cleaning channel area, the driving component drives the cleaning channel to rotate, so that the scraper at the edge of the cleaning channel opening contacts the upper and lower sides of the board respectively, and the first rotating motor is started. The first rotating motor drives the cleaning shaft to rotate, and the spiral blades and spiral cleaning brush on the cleaning shaft rotate accordingly to perform preliminary brushing on the upper and lower surfaces of the board. S3. After the initial brushing, the board continues to move forward and reaches the area of ​​the spray pipe. At this time, the rinsing nozzle on the spray pipe sprays high-pressure cleaning oil onto the surface of the board to rinse the upper and lower sides of the board. S4. After rinsing, the board enters the oil scraping channel area. The second rotating motor is started, and the second rotating motor drives the cleaning roller brush to rotate. The cleaning roller brush sucks away the oil layer on the surface of the board. At the same time, the arc-shaped oil scraping strip scrapes the cleaning oil on the cleaning roller brush into the oil guide channel during the rotation of the cleaning roller brush, so that the cleaning roller brush always maintains sufficient oil suction capacity. S5. During the cleaning process, the oil on the board falls from the edge into the guide plate at the top of the recovery tank. The oil in each oil channel flows into the guide plate at the top of the recovery tank through the oil guide pipe. After being filtered by the filter cloth, the cleaning oil flows into the recovery tank. The oil drain pipe is opened to discharge the cleaning oil in the recovery tank. Alternatively, the high-pressure water pump can be started to circulate the cleaning oil in the recovery tank into the spray pipe, and the cleaning oil at the bottom of the recovery tank is used to circulate and rinse the board. S6. Finally, the cleaned and dried board is output from the tail end of the conveyor frame to dry, completing the entire cleaning process.

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