A surface tinning device and method for processing Roots blower blades

Abstract

The present invention belongs to the technical field of tinning equipment, and in particular to a surface tinning equipment and method for processing Roots blower blades. In view of the problem that the blades of Roots blowers are easily contaminated with oil, rust, oxides and other pollutants, and the tin layer is easy to fall off after tinning without treatment, the following scheme is proposed, including a bearing plate, the upper surface of the bearing plate is fixed with support plates by bolts near both ends, and the upper surfaces of the two support plates are provided with slide grooves near the middle, the upper surfaces of the two support plates are slidably connected with connecting rod blocks, and the adjacent sides of the two connecting rod blocks are rotatably connected with the same hanging rod, and the bottom end of the connecting rod block is welded with a groove block near the middle, and the groove block and the slide groove are adapted. The present invention scrapes the rotor blades by arranging bristles to remove all oil, rust, oxides and other pollutants, and improve the adhesion of the coating.

Description

Technical Field

[0001] The invention relates to the technical field of tinning equipment, and in particular to a surface tinning equipment and method for processing Roots blower blades. Background Art

[0002] Roots blower is a positive displacement blower that uses two intermeshing blades to operate in a closed cavity to produce gas compression and delivery. It is mainly used to provide stable airflow and pressure, and is widely used in industrial gas transportation, sewage treatment and gas pressurization. Roots blowers generally use symmetrical blade designs, such as double blades or three blades, which ensures that the blower is stable and efficient during operation.

[0003] During the operation of Roots blower, two blades mesh with each other. To ensure the smoothness of meshing, the blades need to be tinned. During conventional tinning, the blades are not cleaned or cleaned too early, and the surface of the blades is repeatedly contaminated and rusted, producing oxides, which seriously affects the adhesion rate of tin plating and makes the tin plating layer easy to fall off. Therefore, a surface tinning equipment and method for processing Roots blower blades are proposed. Summary of the invention

[0004] The invention provides a surface tinning device and method for processing Roots blower blades in order to solve the problem that the blades of Roots blowers are easily contaminated with oil, rust, oxides and other pollutants and the tin layer is easily detached after tinning without treatment.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a tinning equipment for processing Roots blower blades, comprising a bearing plate, the upper surface of the bearing plate is fixed with support plates by bolts near both ends, and the upper surfaces of the two support plates are provided with slide grooves near the middle, the upper surfaces of the two support plates are slidably connected with connecting rod blocks, and the two connecting rod blocks are rotatably connected with the same hanging rod on one side, the bottom end of the connecting rod block is welded with a groove block near the middle, and the groove block and the slide groove are adapted to each other, the circumferential outer wall of the hanging rod is sleeved and fixed with a rotor blade near the middle, and the circumferential outer wall of the hanging rod is sleeved and fixed with a gear 2 near one end, support blocks 2 are welded at the bottom ends of the upper surfaces of the bearing plate near the two ends, and the tops of the two support blocks 2 are fixed with the same rack 2 by bolts, and the rack 2 and the gear 2 are meshed, a cleaning mechanism is installed near one side of the upper surface of the bearing plate, and the cleaning mechanism includes support block 1.

[0006] A further configuration of the present invention is that the cleaning mechanism includes a support block one, a pair of support blocks one are welded to the upper surface of the carrier plate near the front end and the rear end of one side, and side plates are welded to the top ends of the two pairs of support blocks one, adjacent ends of the two side plates are evenly rotatably connected with a rotating shaft, and the circumferential outer wall of the rotating shaft is evenly fixed with bristles.

[0007] A further arrangement of the present invention is that a toothed disc is sleeved and fixed at one end of the circumferential outer wall of several of the rotating shafts away from gear two, and the circumferential outer walls of several of the toothed discs are rotatably connected to the same chain belt, a driving source is fixed at one end of the rotating shaft away from gear two away from the middle of the bearing plate, and the output shaft of the driving source is connected to the rotating shaft through a coupling.

[0008] A further configuration of the present invention is that a pair of support columns are fixed to the upper surface of the bearing plate near both ends by bolts, and guide blocks are fixed to the tops of the two pairs of support columns by bolts, sliding holes are opened at adjacent ends of the two guide blocks, and sliders are slidably connected to the inner walls of the two sliding holes, and the same loading rod is sleeved and fixed to adjacent sides of the two sliders.

[0009] A further configuration of the present invention is that the outer circumferential wall of the loading rod is provided with insertion holes near both ends, and the two insertion holes are connected with push rods, and the bottom ends of the two push rods are welded with clamping blocks, and the clamping blocks are adapted to the hanging rod.

[0010] A further configuration of the present invention is that the top end of the push rod is fixed with a limit plate by bolts, and the bottom end of the limit plate is fixed with a contraction spring near the circumferential edge, the bottom end of the contraction spring is fixed with a cushion block, and the cushion block is connected to the loading rod.

[0011] A further configuration of the present invention is that a connecting block is sleeved and fixed near one end of the circumferential outer wall of the loading rod, and a rack 1 is welded to the top of the connecting block, a servo motor is fixed near the middle of the upper surface of the guide block near rack 1, and the output shaft of the servo motor is connected to a gear shaft through a coupling, a gear 1 is sleeved and fixed on the circumferential outer wall of the gear shaft, and gear 1 and rack 1 are meshed.

[0012] A further configuration of the present invention is that a pair of positioning columns are welded to both sides of the upper surface of the carrier plate near the middle, and the circumferential outer walls of several positioning columns are sleeved with support springs, the top ends of several support springs are welded with support plates, and the top ends of the two pairs of support plates near the two sides are fixed with connecting plates by bolts, the top ends of the two connecting plates are fixed with the same molten tin box near the middle, and pads are fixed with bolts near the two ends of the two connecting plates, and the top ends of the two pads are fixed with lifting blocks by bolts, the lifting blocks are provided with bevel angles on both sides, and the inner walls on both sides of the lifting blocks are provided with arc angles.

[0013] A further configuration of the present invention is that a pair of bracket blocks are welded to the side of the upper surface of the carrier plate away from the driving source, and adjacent ends of the bracket blocks are rotatably connected to the same fan shaft near the top, fan blades are evenly welded to the end of the circumferential outer wall of the fan shaft near the molten tin box, and the circumferential outer wall of the fan shaft and the circumferential outer wall of the rotating shaft near the molten tin box are rotatably connected to the same transmission belt.

[0014] A method for processing the surface tinning of Roots blower blades, comprising the following steps:

[0015] S1: First, assemble the parts, move the hanging rod and the loading rod to the top of the driving source, then lift the push rod upward so that the block can fix the hanging rod, then start the servo motor, the servo motor drives gear 1 to move rack 1 away from the driving source, and then drives the loading rod to move the hanging rod away from the driving source along the slide slot, and at the same time, under the action of gear 2 and rack 2, the hanging rod rotates;

[0016] S2: The driving source is started to rotate the rotating shaft. Under the action of the chain belt, several rotating shafts rotate simultaneously, so that the bristles continuously clean the rotor blades rotating with the hanging rod;

[0017] S3: When the hanging rod moves to the middle of the support plate and touches the bevel, the supporting spring under the corresponding bevel is forced to contract, so that one side of the molten tin box is lower than the rotor blade, ensuring that the rotor blade enters the top of the molten tin box without collision. When the rotor blade completely enters the top of the molten tin box, the hanging rod moves to the arc angle, the supporting spring resets, and the molten tin box is lifted, so that the rotor blade is immersed in the molten tin, and the tinning is completed;

[0018] S4: After the rotor blades are tinned and separated from the molten tin box, they continue to rotate with the hanging rod. The rotating action allows the tin layer to be evenly distributed during the drying process, reducing the thickness difference of the coating, thereby improving the overall quality and consistency of the coating. At the same time, the rotating shaft drives the transmission belt to rotate the fan shaft. The rotation of the fan blades generates air blowing on the rotor blades, increasing the cooling speed, helping to form a uniform tin coating, and avoiding bubbles or uneven coating.

[0019] In summary, the beneficial effects of this solution are:

[0020] 1. Use brushes to scrape the rotor blades to remove all oil, rust, oxides and other contaminants, and improve the adhesion of the coating;

[0021] 2. By setting the lifting block, the molten tin box can be lifted and lowered along with the movement of the hanging rod, so as to prevent the rotor blades from touching the molten tin box and protect the integrity of the tinning layer;

[0022] 3. By setting the fan blades, the cooling and fixing speed of the tin plating layer can be accelerated, which is conducive to forming a uniform tin plating layer and avoiding bubbles or uneven coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the front-end structure of a tinning device for processing Roots blower blades proposed by the present invention;

[0024] Figure 2 A schematic diagram of the top structure of a tinning device for processing Roots blower blades proposed by the present invention;

[0025] Figure 3 A schematic diagram of the side structure of a tinning device for processing Roots blower blades proposed by the present invention;

[0026] Figure 4 A schematic diagram of the support plate structure of a tinning device for processing Roots blower blades proposed by the present invention;

[0027] Figure 5 A schematic diagram of the toothed disc structure of a tinning device for processing Roots blower blades proposed by the present invention;

[0028] Figure 6 A schematic diagram of the structure of a lifting block of a tinning device for processing Roots blower blades proposed by the present invention;

[0029] Figure 7 The present invention proposes a surface tinning device for processing Roots blower blades Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0030] In the figure: 1, support column; 2, push rod; 3, slider; 4, bearing plate; 5, support plate; 501, slide groove; 6, guide block; 601, slide hole; 7, gear 1; 8, gear shaft; 9, servo motor; 10, loading rod; 11, rack 1; 12, rack 2; 13, molten tin box; 14, hanging rod; 15, rotor blade; 16, block; 17, driving source; 18, support block 1; 19, support block 2; 20, connecting rod block; 21, limit Plate; 22, lifting block; 2201, bevel angle; 2202, arc angle; 23, contraction spring; 24, connecting block; 25, cushion block; 26, slot block; 27, gear 2; 28, bristles; 29, side plate; 30, rotating shaft; 31, toothed plate; 32, chain belt; 33, support plate; 34, connecting plate; 35, cushion plate; 36, positioning column; 37, support spring; 38, fan shaft; 39, transmission belt; 40, bracket block; 41, fan blade. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In this embodiment, refer to Figure 1-7 A tinning device for processing Roots blower blades includes a bearing plate 4, a support plate 5 is fixed by bolts near both ends of the upper surface of the bearing plate 4, and a slide groove 501 is opened near the middle of the upper surfaces of the two support plates 5, and the upper surfaces of the two support plates 5 are slidably connected with a connecting rod block 20, and the adjacent sides of the two connecting rod blocks 20 are rotatably connected with the same hanging rod 14, a groove block 26 is welded near the middle of the bottom end of the connecting rod block 20, and the groove block 26 is adapted to the slide groove 501, a rotor blade 15 is sleeved and fixed near the middle of the circumferential outer wall of the hanging rod 14, and the circumferential outer wall of the hanging rod 14 near one end A gear 27 is sleeved and fixed at the bearing plate 4, support blocks 19 are welded at the bottom ends of the gear 27 on both sides of the upper surface of the bearing plate 4, and the tops of the two support blocks 19 are fixed with the same rack 212 by bolts, and the rack 212 and the gear 21 are meshed. A cleaning mechanism is installed near one side of the upper surface of the bearing plate 4, and the cleaning mechanism includes a support block 18; when the hanging rod 14 is moved laterally, the rack 212 and the gear 21 are meshed to make the hanging rod 14 rotate, and the rotor blades 15 rotate at the same time, so that the cleaning mechanism can fully clean the rotor blades 15, avoid cleaning dead corners, and improve the cleaning efficiency.

[0033] refer to Figure 5 The cleaning mechanism includes a support block 18, a pair of support blocks 18 are welded on the upper surface of the carrier plate 4 near the front end and the rear end of one side, and the tops of the two pairs of support blocks 18 are welded with side plates 29, the adjacent ends of the two side plates 29 are evenly rotatably connected with a rotating shaft 30, and the circumferential outer wall of the rotating shaft 30 is evenly fixed with bristles 28, the circumferential outer walls of several rotating shafts 30 are sleeved and fixed with toothed discs 31 at one end away from the gear 2 27, and the circumferential outer walls of several toothed discs 31 are rotatably connected with the same chain belt 32, the end of the rotating shaft 30 away from the middle of the carrier plate 4 and away from the gear 2 27 is fixed with a driving source 17, and the output shaft of the driving source 17 is connected to the rotating shaft 30 through a coupling; by setting the bristles 28, the rotor blades 15 are scraped to remove all oil, rust, oxides and other pollutants, thereby improving the adhesion of the coating.

[0034] refer to Figure 4A pair of support columns 1 are fixed to the upper surface of the bearing plate 4 near both ends by bolts, and guide blocks 6 are fixed to the tops of the two pairs of support columns 1 by bolts, and sliding holes 601 are opened at the adjacent ends of the two guide blocks 6, and the inner walls of the two sliding holes 601 are slidably connected with sliders 3, and the adjacent sides of the two sliders 3 are sleeved and fixed with the same loading rod 10, and the circumferential outer wall of the loading rod 10 is opened near both ends, and the two plugging holes are plugged with push rods 2, and the bottom ends of the two push rods 2 are welded with clamping blocks 16, and the clamping blocks 16 are adapted to the hanging rod 14, and the top of the push rod 2 is fixed with a limiting disk 21 by bolts, and the bottom end of the limiting disk 21 is fixed with a contraction spring 2 near the circumferential edge. 3. A cushion block 25 is fixed to the bottom end of the contraction spring 23, and the cushion block 25 is connected to the loading rod 10. A connecting block 24 is sleeved and fixed near one end of the circumferential outer wall of the loading rod 10, and a rack 11 is welded to the top of the connecting block 24. A servo motor 9 is fixed near the middle of the upper surface of the guide block 6 near the rack 11, and the output shaft of the servo motor 9 is connected to the gear shaft 8 through a coupling. A gear 7 is sleeved and fixed to the circumferential outer wall of the gear shaft 8, and the gear 7 and the rack 11 are meshed. By setting the contraction spring 23, a downward force is continuously provided to the push rod 2 to prevent the hanging rod 14 from generating a height displacement difference when contacting the lifting block 22, causing the block 16 to detach from the hanging rod 14.

[0035] refer to Figure 6 A pair of positioning columns 36 are welded on both sides of the upper surface of the bearing plate 4 near the middle, and the circumferential outer walls of several positioning columns 36 are sleeved with support springs 37, and the tops of several support springs 37 are welded with support plates 33, and the tops of the two pairs of support plates 33 near the two sides are fixed with connecting plates 34 by bolts, and the tops of the two connecting plates 34 are fixed with the same molten tin box 13 near the middle, and pads 35 are fixed with bolts near the two ends of the two connecting plates 34, and the tops of the two pads 35 are fixed with lifting blocks 22 by bolts, and the lifting blocks 22 are provided with bevel angles 2201 on both sides, and the inner walls of the lifting blocks 22 are provided with arc angles 2202; by setting the lifting blocks 22, the molten tin box 13 can be lifted and lowered with the movement of the hanging rod 14, so as to avoid the rotor blades 15 touching the molten tin box 13 and protect the integrity of the tin plating layer.

[0036] refer to Figure 2 , Figure 3 , Figure 7A pair of bracket blocks 40 are welded on the side of the upper surface of the supporting plate 4 away from the driving source 17, and the adjacent end of the bracket block 40 is rotatably connected to the same fan shaft 38 near the top, and the circumferential outer wall of the fan shaft 38 is evenly welded with fan blades 41 at one end close to the molten tin box 13, and the circumferential outer wall of the fan shaft 38 and the circumferential outer wall of the rotating shaft 30 close to the molten tin box 13 are rotatably connected to the same transmission belt 39; by arranging the fan blades 41, the cooling and fixing speed of the tin plating layer can be accelerated, which is conducive to forming a uniform tin plating layer and avoiding the occurrence of bubbles or uneven coating.

[0037] A method for processing the surface tinning of Roots blower blades, comprising the following steps:

[0038] S1: First, assemble the parts, move the hanging rod 14 and the loading rod 10 to the top of the driving source 17, then lift the push rod 2 upwards so that the block 16 can fix the hanging rod 14, then start the servo motor 9, the servo motor 9 drives the gear 1 7 to move the rack 1 11 away from the driving source 17, and then drives the loading rod 10 to make the hanging rod 14 move away from the driving source 17 along the slide 501, and at the same time, under the action of the gear 2 27 and the rack 2 12, the hanging rod 14 rotates;

[0039] S2: The driving source 17 is started to rotate the rotating shaft 30. Under the action of the chain belt 32, a plurality of rotating shafts 30 rotate simultaneously, so that the bristles 28 continuously clean the rotor blades 15 rotating with the hanging rod 14.

[0040] S3: When the hanging rod 14 moves to the middle of the support plate 5 and touches the bevel 2201, the support spring 37 under the corresponding bevel 2201 is forced to contract, so that one side of the molten tin box 13 is lower than the rotor blade 15, ensuring that the rotor blade 15 enters the top of the molten tin box 13 without collision. When the rotor blade 15 completely enters the top of the molten tin box 13, the hanging rod 14 moves to the arc angle 2202, the support spring 37 is reset, and the molten tin box 13 is lifted, so that the rotor blade 15 is immersed in the molten tin, and the tinning is completed;

[0041] S4: After the rotor blades 15 are tinned and separated from the molten tin box 13, they continue to rotate with the hanging rod 14. The rotating action allows the tin coating to be evenly distributed during the drying process, reducing the thickness difference of the coating, thereby improving the overall quality and consistency of the coating. At the same time, the rotating shaft 30 drives the transmission belt 39 to rotate the fan shaft 38, and the fan blades 41 rotate to generate air blowing on the rotor blades 15, thereby increasing the cooling speed, helping to form a uniform tin coating, and avoiding bubbles or uneven coating.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tinning device for processing Roots blower blades, comprising a carrier plate (4), characterized in that: The upper surface of the bearing plate (4) is fixed with support plates (5) by bolts near both ends, and the upper surfaces of the two support plates (5) are provided with slide grooves (501) near the middle. The upper surfaces of the two support plates (5) are slidably connected with connecting rod blocks (20), and the adjacent sides of the two connecting rod blocks (20) are rotatably connected with the same hanging rod (14). The bottom end of the connecting rod block (20) is welded with a groove block (26) near the middle, and the groove block (26) and the slide groove (501) are adapted to each other. The circumferential outer wall of the hanging rod (14) is close to A rotor blade (15) is sleeved and fixed at the middle part, and a gear 2 (27) is sleeved and fixed at the circumferential outer wall of the hanging rod (14) near one end, support blocks 2 (19) are welded at both sides of the upper surface of the carrier plate (4) near the bottom end of the gear 2 (27), and the top ends of the two support blocks 2 (19) are fixed with the same rack 2 (12) by bolts, and the rack 2 (12) and the gear 2 (27) are meshed, and a cleaning mechanism is installed near one side of the upper surface of the carrier plate (4), and the cleaning mechanism includes a support block 1 (18); A pair of support columns (1) are fixed to the upper surface of the bearing plate (4) near both ends by bolts, and guide blocks (6) are fixed to the tops of the two pairs of support columns (1) by bolts, and sliding holes (601) are formed at adjacent ends of the two guide blocks (6), and sliding blocks (3) are slidably connected to the inner walls of the two sliding holes (601), and the same loading rod (10) is sleeved and fixed to adjacent sides of the two sliding blocks (3); The outer wall of the loading rod (10) is provided with insertion holes near both ends, and the two insertion holes are connected with push rods (2). The bottom ends of the two push rods (2) are welded with clamping blocks (16), and the clamping blocks (16) are adapted to the hanging rod (14); The top end of the push rod (2) is fixed to a limit plate (21) by means of bolts, and a contraction spring (23) is fixed to the bottom end of the limit plate (21) near the circumferential edge, and a cushion block (25) is fixed to the bottom end of the contraction spring (23), and the cushion block (25) is connected to the loading rod (10); A connecting block (24) is sleeved and fixed near one end of the circumferential outer wall of the loading rod (10), and a rack (11) is welded to the top of the connecting block (24); a servo motor (9) is fixed near the middle of the upper surface of the guide block (6) near the rack (11), and the output shaft of the servo motor (9) is connected to a gear shaft (8) via a coupling; a gear shaft (7) is sleeved and fixed on the circumferential outer wall of the gear shaft (8), and the gear shaft (7) and the rack shaft (11) are meshed; A pair of positioning columns (36) are welded to both sides of the upper surface of the bearing plate (4) near the middle, and the circumferential outer walls of the plurality of positioning columns (36) are sleeved with support springs (37), the top ends of the plurality of support springs (37) are welded with support plates (33), and the top ends of the two pairs of support plates (33) near the two sides are fixed with connecting plates (34) by bolts, the top ends of the two connecting plates (34) are fixed with the same molten tin box (13) near the middle, and pads (35) are fixed with bolts near both ends of the two connecting plates (34), and the top ends of the two pads (35) are fixed with lifting blocks (22) by bolts, and the lifting blocks (22) are provided with bevel angles (2201) on both sides, and arc angles (2202) are provided on the inner walls of the lifting blocks (22).

2. The tinning equipment for processing Roots blower blades according to claim 1 is characterized in that: The cleaning mechanism comprises a support block (18), a pair of support blocks (18) are welded to the upper surface of the carrier plate (4) near the front end and the rear end of one side, and the top ends of the two pairs of support blocks (18) are welded to side plates (29), adjacent ends of the two side plates (29) are evenly rotatably connected to a rotating shaft (30), and the circumferential outer wall of the rotating shaft (30) is evenly fixed with bristles (28).

3. The tinning equipment for processing Roots blower blades according to claim 2 is characterized in that: A toothed disc (31) is sleeved and fixed at one end of the circumferential outer wall of the plurality of rotating shafts (30) away from the second gear (27), and the circumferential outer walls of the plurality of toothed discs (31) are rotatably connected to a same chain belt (32), and a driving source (17) is fixed at one end of the rotating shaft (30) away from the middle of the bearing plate (4) away from the second gear (27), and an output shaft of the driving source (17) is connected to the rotating shaft (30) via a coupling.

4. The tinning equipment for processing Roots blower blades according to claim 3 is characterized in that: A pair of bracket blocks (40) are welded to a side of the upper surface of the carrier plate (4) away from the driving source (17), and adjacent ends of the bracket blocks (40) are rotatably connected to the same fan shaft (38) near the top, and fan blades (41) are evenly welded to an end of the circumferential outer wall of the fan shaft (38) near the molten tin box (13), and the circumferential outer wall of the fan shaft (38) and the circumferential outer wall of the rotating shaft (30) near the molten tin box (13) are rotatably connected to the same transmission belt (39).

5. A method for processing the surface tinning of Roots blower blades, comprising the surface tinning device for processing the surface tinning of Roots blower blades as claimed in claim 4, characterized in that: The following steps are involved: S1: First, assemble the parts, move the hanging rod (14) and the loading rod (10) to the top of the driving source (17), then lift the push rod (2) upward so that the clamping block (16) can fix the hanging rod (14), then start the servo motor (9), the servo motor (9) drives the gear 1 (7) to move the rack 1 (11) away from the driving source (17), and then drives the loading rod (10) to move the hanging rod (14) away from the driving source (17) along the slide groove (501), and at the same time, under the action of the gear 2 (27) and the rack 2 (12), the hanging rod (14) rotates; S2: The driving source (17) is started to rotate the rotating shaft (30). Under the action of the chain belt (32), the plurality of rotating shafts (30) rotate simultaneously, so that the bristles (28) continuously clean the rotor blades (15) rotating along with the hanging rod (14); S3: When the hanging rod (14) moves to the middle of the support plate (5) and touches the bevel (2201), the support spring (37) under the corresponding bevel (2201) is forced to contract, so that one side of the molten tin box (13) is lower than the rotor blade (15), ensuring that the rotor blade (15) enters the top of the molten tin box (13) without collision. When the rotor blade (15) completely enters the top of the molten tin box (13), the hanging rod (14) moves to the arc angle (2202), the support spring (37) is reset, and the molten tin box (13) is lifted, so that the rotor blade (15) is immersed in the molten tin, and the tin plating is completed; S4: After the rotor blades (15) have completed tinning and are separated from the molten tin box (13), they continue to rotate with the hanging rod (14). The rotating action enables the tinned layer to be evenly distributed during the drying process, reducing the thickness difference of the coating, thereby improving the overall quality and consistency of the coating. At the same time, the rotating shaft (30) drives the transmission belt (39) to rotate the fan shaft (38), and the fan blades (41) rotate to generate air blowing on the rotor blades (15), thereby increasing the cooling speed, helping to form a uniform tin coating, and avoiding the formation of bubbles or uneven coating.

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