A hot air circulation drying device for workpiece processing and a process

Abstract

The application provides a hot air circulation drying device for workpiece processing and a process, and belongs to the technical field of drying devices. The hot air circulation drying device for workpiece processing comprises a machine body, a placing unit is arranged on the machine body through a conveying unit, the placing unit is used for placing workpieces, the conveying unit can convey the placing unit into a drying unit, the placing unit comprises vertical plates which are installed on the conveying unit, adjusting plates are arranged between the vertical plates, and supports slide up and down on the adjusting plates. The workpieces are placed at equal intervals in a vertical and separated manner, and the workpieces are driven to rotate by a hanging rod in the whole process, so that the problems of gasket stacking and contact and shielding of the conveying belt are solved from the root, hot air can contact the surface of the workpieces at 360 degrees, and there is no drying dead angle.

Description

Technical Field

[0001] This invention belongs to the technical field of drying equipment, specifically relating to a hot air circulating drying device and process for workpiece processing. Background Technology

[0002] Metal gaskets, as key sealing components in mechanical, electrical, and piping fields, are mostly made of metals such as stainless steel, copper, and aluminum. During processing, after stamping, polishing, cleaning, or surface treatment, moisture or cleaning fluid may remain on the surface. If not thoroughly dried, this can lead to rust and oxidation on the metal gasket surface, severely affecting its sealing performance, structural stability, and service life, thus failing to meet subsequent assembly and operational requirements. Therefore, drying is a crucial step in the production of metal gaskets.

[0003] Chinese patent CN113686138B discloses a fully automatic belt dryer, including a drying oven and a conveyor belt. The drying oven has first openings on its two side walls. The conveyor belt, which is mesh-like, extends out of the drying oven through the first openings at both ends. A feed hopper is located at the top of one side of the drying oven, and a heating device is installed inside the oven. The purpose of this invention is to provide a fully automatic belt dryer with high drying efficiency and good drying effect.

[0004] Since gaskets are flat workpieces, during the stacking and conveying process on the conveyor belt, the gaskets overlap and block each other and between the gaskets and the conveyor belt. This makes it difficult for the surface moisture of the blocked areas of the gaskets to fully contact and exchange heat with the hot air, ultimately reducing the overall drying efficiency of the gaskets. Summary of the Invention

[0005] The purpose of this invention is to provide a hot air circulating drying device and process for workpiece processing, which aims to solve the problem in the prior art that the gaskets tend to overlap and block each other, resulting in the surface moisture of the blocked parts not being able to fully contact the hot air, thus affecting the overall drying efficiency of the bolts.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot air circulating drying device for workpiece processing, comprising: a machine body, on which a placement unit is provided via a conveying unit, the placement unit being used to place workpieces, the conveying unit being able to convey the placement unit into a drying unit, the placement unit including a vertical plate mounted on the conveying unit, an adjusting plate being provided between the vertical plates, a bracket being slidably connected to the adjusting plate, an elastic element being provided on the bracket to drive the bracket to move upward, two support rollers being rotatably provided on the bracket, a snap-fit ​​groove being provided on the vertical plate, a hanging rod being provided in the snap-fit ​​groove, the hanging rod being used to string workpieces together.

[0007] A further technical solution of the present invention is that friction wheels are provided at both ends of the hanging rod, and friction strips are provided on the drying unit. When the hanging rod moves into the interior of the drying unit, the friction wheels can contact the friction strips, and the friction between the two can drive the friction wheels and the hanging rod to rotate, so that the hanging rod drives the workpiece to rotate.

[0008] A further technical solution of the present invention is that the drying unit includes an annular groove opened on the support roller, and multiple annular grooves are provided and evenly distributed along the length direction of the support roller. The width of the annular groove is greater than the thickness of the workpiece, and the workpiece is located in the annular groove.

[0009] A further technical solution of the present invention is that the drying unit is also provided with a shell and a hot air blower located inside the shell. Two rollers are rotatably connected inside the shell. A ring-shaped flexible rope is provided on the roller. The flexible rope is tensioned by the two rollers. Multiple tubes are movably sleeved on the flexible rope. A water-absorbing cloth is fixedly installed on each of the multiple tubes. When the water-absorbing cloth is in a natural hanging state, it is located in the gap between two workpieces. A drive device for driving the rollers to rotate is provided on the shell.

[0010] A further technical solution of the present invention is that the snap-fit ​​groove is L-shaped, with its vertical section being open and its horizontal section extending in the direction of movement away from the conveying unit.

[0011] A further technical solution of the present invention is that each of the upright plates is provided with an adjustment groove, and both ends of the adjustment plate are provided with threaded posts located in the adjustment groove; the threaded posts pass through the adjustment groove and are threadedly connected to the nut.

[0012] A further technical solution of the present invention is that the absorbent cloth is made of pure cotton.

[0013] A further technical solution of the present invention is that the cross-section of the roller is a regular polygonal structure, and the side length of each side is equal to the length of the tube.

[0014] A hot air circulating drying process for workpiece processing includes the following steps:

[0015] S1. Loosen the nut in the vertical plate adjustment groove, adjust the height of the adjustment plate and then tighten it to match the workpiece size and the preload of the elastic element;

[0016] S2. The metal pads are evenly strung on the hanging rod, so that each pad corresponds to the annular groove of the support roller, and the pads are placed at equal intervals.

[0017] S3. Place the hanging rod on the two support rollers, press down on the hanging rod to compress the elastic element, and push both ends of the hanging rod into the horizontal section along the vertical section of the L-shaped snap-fit ​​groove to complete the fixation.

[0018] S4. Start the conveyor unit drive source. The rotating shaft drives the chain and the cross plate to move, and smoothly send the placement unit into the shell of the drying unit.

[0019] S5. When the hanging rod moves to the drying area, the end friction wheel meshes with the friction strip, driving the hanging rod and the workpiece to rotate at a constant speed. At the same time, the hot air blower is turned on to deliver circulating hot air.

[0020] S6. Start the drive unit. The roller drives the flexible rope, tube and absorbent cloth to rotate in a cycle. The absorbent cloth swings to absorb water stains and is simultaneously dried by hot air.

[0021] S7. The conveying unit delivers the placement unit out of the housing, removes the hanging rod from the snap-fit ​​slot, and unloads the dried workpiece, completing the entire process.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The workpieces are placed vertically and at equal intervals, and the hanging rods drive the workpieces to rotate throughout the process, which solves the problems of stacked gaskets and contact with the conveyor belt from the root. Hot air can contact the workpiece surface 360°, without any drying dead corners.

[0024] 2. The pure cotton absorbent cloth circulates and absorbs the water on the surface of the workpiece, while hot air dries the absorbent cloth simultaneously. This not only quickly removes water stains and increases the drying speed, but also keeps the absorbent cloth with continuous and efficient water absorption capacity, avoiding failure due to water saturation.

[0025] 3. Relying on the Karman vortex street effect of hot air, the absorbent cloth can swing autonomously without the need for a motor drive. Combined with the stable operation of the regular polygonal roller, the structure is simpler and the energy consumption is lower.

[0026] 4. When the absorbent cloth moves to the gap, it can automatically shake off the residual moisture. Hot air continuously dries the absorbent cloth, eliminating the need for manual cleaning and replacement. Its level of automation far exceeds that of conventional drying equipment.

[0027] 5. The workpiece is in line contact with the hanging rod and support roller, which reduces obstruction and avoids friction scratches on the workpiece surface, effectively ensuring the processing quality of the workpiece. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of a specific embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of the drying unit in a specific embodiment of the present invention;

[0031] Figure 3This is a schematic diagram of the conveying unit in a specific embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the placement unit in a specific embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram illustrating the cooperation between the flexible rope and the roller in a specific embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram illustrating the fit between the flexible rope and the tube in a specific embodiment of the present invention;

[0035] Figure 7 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0036] In the diagram: 1. Machine body; 2. Drying unit; 3. Conveying unit; 4. Placement unit; 5. Hanging rod; 21. Friction strip; 22. Roller; 23. Flexible rope; 24. Tube body; 25. Absorbent cloth; 26. Joint ball; 27. Shell; 31. Rotating shaft; 32. Horizontal plate; 41. Vertical plate; 42. Adjusting plate; 43. Sliding column; 44. Bracket; 45. Elastic element; 46. Support roller; 51. Friction wheel; 411. Snap-fit ​​groove; 412. Adjusting groove; 421. Threaded column; 422. Nut; 461. Annular groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-7 The present invention provides the following technical solution: a hot air circulating drying device for workpiece processing, comprising a body 1, a drying unit 2, a conveying unit 3, and a placement unit 4.

[0039] The drying unit 2 is located above the machine body 1. The workpiece is placed on the placement unit 4 and can be neatly placed on the placement unit 4. The placement unit 4 is installed on the conveying unit 3. The workpiece is conveyed to the bottom of the drying unit 2 through the conveying unit 3 for drying.

[0040] Please see Figures 2-4The conveying unit 3 includes two rotating shafts 31 rotatably mounted on the machine body 1. The two rotating shafts 31 are located at both ends of the machine body 1. Sprockets are provided on both sides of the rotating shafts 31, and chains are installed on the sprockets. Each sprocket on the same side of the two rotating shafts 31 is engaged with a chain. A horizontal plate 32 is provided on the two chains, and the two ends of the horizontal plate 32 are respectively installed on the two chains. A drive source is also provided on the machine body 1 to drive one of the rotating shafts 31 to rotate. When the drive source drives the rotating shaft 31 to rotate, it can drive the two chains to move synchronously, thereby driving the horizontal plate 32 located on the chain to move. The placement unit 4 is installed on the horizontal plate 32, so that the horizontal plate 32 can drive the placement unit 4 to move towards the drying unit 2.

[0041] Please see Figure 4 and Figure 7 The placement unit 4 includes two upright plates 41 fixed to both sides of the horizontal plate 32 by screws. The upright plates 41 are perpendicular to the horizontal plate 32. An adjusting plate 42 is provided between the two upright plates 41. The two ends of the adjusting plate 42 are adjustablely mounted on the upright plates 41 to adjust the height of the adjusting plate 42 on the upright plates 41. Two sliding columns 43 pass through the middle of the adjusting plate 42 and can slide up and down within the adjusting plate 42. A bracket 44 is fixedly connected above the two sliding columns 43. The bracket 44 is U-shaped and the opening faces upward. The sliding columns 43 are provided with a drive bracket 44 to... The elastic element 45 that moves upward is specifically a compression spring, with one end fixed to the bracket 44 and the other end fixed to the adjusting plate 42. Two support rollers 46 are installed on the bracket 44, with both ends of the two support rollers 46 rotatably set on the two side walls of the bracket 44, so that the two support rollers 46 are located in the concave part of the bracket 44. There is a gap between the two support rollers 46, and the distance between the two and the bottom wall of the bracket 44 is the same. The top of the two upright plates 41 is provided with a snap-fit ​​groove 411, and a hanging rod 5 is provided in the snap-fit ​​groove 411. The hanging rod 5 is used to string the workpieces together.

[0042] In use, the workpiece is first strung on the hanging rod 5, and then the finished workpiece is placed on the two support rollers 46, so that the outer ring surface of the workpiece abuts against the support rollers 46 and the inner ring surface abuts against the hanging rod 5. Then, the hanging rod 5 is moved downward, and the hanging rod 5 pushes the bracket 44 downward through the workpiece. At the same time, the elastic element 45 is compressed. Then, the two ends of the hanging rod 5 are fixed in the snap-fit ​​grooves 411 to complete the workpiece installation. The installed workpiece is in an upright position, which can avoid the drying blind zone caused by stacking; and the workpiece is in line contact with the support rollers 46 and the hanging rod 5, further reducing the occurrence of drying blind zones and effectively improving drying efficiency.

[0043] Friction wheels 51 are provided at both ends of the hanging rod 5, and friction strips 21 are provided on both sides of the drying unit 2. When the hanging rod 5 moves into the interior of the drying unit 2, the friction wheels 51 can contact the friction strips 21. The friction between the two can drive the friction wheels 51 to rotate, thereby driving the hanging rod 5 to rotate. When the hanging rod 5 rotates, since the hanging rod 5 abuts against the inner ring surface of the workpiece, it can drive the workpiece to rotate. The support roller 46 and the bracket 44 can be connected by bearings to reduce the friction between the support roller 46 and the bracket 44, and avoid the situation where the workpiece is difficult to rotate. When the workpiece rotates, it can be dried from all directions, avoiding the problem of poor drying effect caused by blind spots.

[0044] Please see Figure 7 The locking groove 411 is L-shaped, with its vertical section open and its horizontal section extending away from the conveying unit 3. When installing the hanging rod 5, it first enters the locking groove 411 through the vertical section, and then pushes the hanging rod 5 into the horizontal section to complete the locking. After the hanging rod 5 is locked, when the upright plate 41 moves into the drying unit 2, the friction strip 21 moves relative to the upright plate 41 towards the horizontal section of the locking groove 411. Therefore, when the upright plate 41 moves, the friction between the friction wheel 51 and the friction strip 21 can push the hanging rod 5 towards the horizontal section of the locking groove 411, thus preventing the hanging rod 5 from falling out of the locking groove 411 during the drying process.

[0045] Please see Figure 4 Both upright plates 41 are provided with adjustment grooves 412. The two ends of the adjustment plate 42 are provided with threaded posts 421 located in the adjustment grooves 412. The threaded posts 421 pass through the adjustment grooves 412 and are threadedly connected to the nuts 422. The nuts 422 can be used to fix the adjustment plate 42 to the upright plate 41. When the adjustment plate 42 needs to be adjusted, its height can be adjusted by simply loosening the nuts 422. By changing the position of the adjustment plate 42, the preload of the elastic element 45 can be adjusted, so that the operator can adjust the required downward pressure when the hanging rod 5 is inserted into the locking groove 411 according to the workpiece specifications, thereby reducing the difficulty of clamping operation and improving convenience.

[0046] Please see Figure 4 The drying unit 2 includes an annular groove 461 opened on the support roller 46. Multiple annular grooves 461 are provided and are evenly distributed along the length direction of the support roller 46. The width of the annular groove 461 is greater than the thickness of the workpiece. When the workpiece is placed on the support roller 46, each workpiece corresponds to an annular groove 461, so that multiple workpieces can be evenly separated at equal intervals.

[0047] Please see Figure 2 , Figure 5 and Figure 6The drying unit 2 also includes a housing 27, inside which is a hot air blower (not shown in the figure). Two rollers 22 are rotatably connected inside the housing 27, positioned at opposite ends of the housing 27 with their axes of rotation on the same horizontal plane. The hot air blower is located above the rollers 22. A flexible rope 23, a closed-loop structure, is attached to each roller 22 and tensioned by the two rollers. Multiple tubes 24 are movably connected to the flexible rope 23, allowing them to rotate freely around it. Each tube 24 is fixedly fitted with an absorbent cloth 25. The absorbent cloth 25 is made of pure cotton and, in its relaxed state, hangs naturally, positioned precisely at the gap between two workpieces. A joint ball 26 is also provided between two adjacent tubes 24. The joint ball 26 is fixedly connected to the flexible rope 23 and plays a role in separating and positioning the tubes 24. The cross-section of the roller 22 is a regular polygonal structure, and the length of each side is equal to the length of the tube 24. Multiple flexible ropes 23, tubes 24, absorbent cloth 25 and joint balls 26 are provided on the flexible ropes 23 and are distributed along the length direction of the roller 22. They are located between every two adjacent workpieces, and the absorbent cloth 25 can contact the side walls of the workpieces on both sides when swinging. A drive device for driving the roller 22 to rotate is provided on the housing 27.

[0048] During operation, the hot air blower is turned on and hot air is blown towards the workpiece. The hot air comes into contact with the workpiece surface after passing through the tube 24 and the absorbent cloth 25. As the hot air flows through the tube 24 and the absorbent cloth 25, the tail of the absorbent cloth 25 will produce a waving motion similar to a red flag due to the Karman vortex street effect. Utilizing the water absorption characteristics of the pure cotton absorbent cloth 25, it can absorb obvious water stains on the surface of the workpiece during the waving process, thereby shortening the drying time and improving the drying efficiency. When the absorbent cloth 25 moves to the outside of the gap between the two placement units 4, the waving motion can shake off the residual water that has not been completely absorbed, preventing the absorbent cloth 25 from reducing its water absorption effect due to excessively rapid saturation. Then, the drive device is started, which drives the roller 22 to rotate. The roller 22 then drives the absorbent cloth 25 to rotate as a whole, moving the absorbent cloth 25 to the area close to the hot air blower. The hot air dries the absorbent cloth 25, ensuring that it always maintains good water absorption capacity.

[0049] A hot air circulating drying process for workpiece processing includes the following steps:

[0050] S1. Loosen the nut 422 of the adjusting groove 412 of the vertical plate 41, adjust the height of the adjusting plate 42 and then lock it to match the workpiece size and the preload of the elastic element 45.

[0051] S2. The metal pads are evenly strung on the hanging rod 5 so that each pad corresponds to the annular groove 461 of the support roller 46, achieving equal spacing and separation.

[0052] S3. Place the hanging rod 5 on the two support rollers 46, press down the hanging rod 5 to compress the elastic element 45, and push both ends of the hanging rod 5 into the horizontal section along the vertical section of the L-shaped snap groove 411 to complete the fixation.

[0053] S4. Start the drive source of the conveyor unit 3. The rotating shaft 31 drives the chain and the horizontal plate 32 to move, and smoothly send the placement unit 4 into the housing 27 of the drying unit 2.

[0054] S5. When the hanging rod 5 moves to the drying area, the end friction wheel 51 meshes with the friction strip 21, driving the hanging rod 5 and the workpiece to rotate at a constant speed. At the same time, the hot air blower is turned on to deliver circulating hot air.

[0055] S6. Start the drive device. The roller 22 drives the flexible rope 23, the tube 24 and the absorbent cloth 25 to rotate in a cycle. The absorbent cloth 25 swings to absorb water stains and is simultaneously dried by hot air.

[0056] S7. The conveying unit 3 sends the placement unit 4 out of the housing 27, takes out the hanging rod 5 from the snap-fit ​​slot 411, and unloads the dried workpiece, completing the entire process.

Claims

1. A hot air circulating drying device for workpiece processing, comprising: The machine body (1) is provided with a placement unit (4) via a conveying unit (3). The placement unit (4) is used to place workpieces. The conveying unit (3) can convey the placement unit (4) into the drying unit (2). The placement unit (4) is characterized in that it includes a vertical plate (41) installed on the conveying unit (3). An adjusting plate (42) is provided between the vertical plates (41). A bracket (44) slides up and down on the adjusting plate (42). An elastic element (45) is provided on the bracket (44) to drive the bracket (44) to move upward. Two support rollers (46) are rotatably provided on the bracket (44). A snap-fit ​​groove (411) is provided on the vertical plate (41). A hanging rod (5) is provided in the snap-fit ​​groove (411). The hanging rod (5) is used to string the workpieces together. Friction wheels (51) are provided at both ends of the hanging rod (5), and friction strips (21) are provided on the drying unit (2). When the hanging rod (5) moves into the interior of the drying unit (2), the friction wheels (51) can contact the friction strips (21), and the friction between the two can drive the friction wheels (51) and the hanging rod (5) to rotate, so that the hanging rod (5) drives the workpiece to rotate. The drying unit (2) includes an annular groove (461) opened on the support roller (46). Multiple annular grooves (461) are provided and are evenly distributed along the length direction of the support roller (46). The width of the annular groove (461) is greater than the thickness of the workpiece, and the workpiece is located in the annular groove (461). The drying unit (2) is also provided with a housing (27) and a hot air blower located inside the housing (27). Two rollers (22) are rotatably connected inside the housing (27). A ring-shaped flexible rope (23) is provided on the rollers (22). The flexible rope (23) is tensioned by the two rollers (22). Multiple tubes (24) are movably sleeved on the flexible rope (23). A water-absorbing cloth (25) is fixedly installed on each of the multiple tubes (24). When the water-absorbing cloth (25) is in a natural hanging state, it is located in the gap between two workpieces. A drive device for driving the rollers (22) to rotate is provided on the housing (27).

2. The hot air circulating drying device for workpiece processing according to claim 1, characterized in that: The snap-fit ​​groove (411) is L-shaped, with its vertical section open and its horizontal section extending away from the moving direction of the conveying unit (3).

3. The hot air circulating drying device for workpiece processing according to claim 2, characterized in that: Each of the upright plates (41) is provided with an adjustment groove (412), and both ends of the adjustment plate (42) are provided with threaded posts (421) located in the adjustment groove (412); the threaded posts (421) pass through the adjustment groove (412) and are threadedly connected to the nut (422).

4. The hot air circulating drying device for workpiece processing according to claim 3, characterized in that: The absorbent cloth (25) is made of pure cotton.

5. A hot air circulating drying device for workpiece processing according to claim 4, characterized in that: The cross-section of the roller (22) is a regular polygonal structure, and the length of each side is equal to the length of the tube (24).

6. A hot air circulating drying process for workpiece processing, characterized in that: The hot air circulating drying device for workpiece processing as described in claim 5 includes the following steps: S1. Loosen the nut (422) of the adjustment groove (412) of the vertical plate (41), adjust the height of the adjustment plate (42) and then tighten it to match the workpiece size and the preload of the elastic element (45); S2. The metal pads are evenly strung on the hanging rod (5) so that each pad corresponds to the annular groove (461) of the support roller (46) and is placed at equal intervals. S3. Place the hanging rod (5) on the two support rollers (46), press down the hanging rod (5) to compress the elastic element (45), and push the two ends of the hanging rod (5) into the horizontal section along the vertical section of the L-shaped snap-fit ​​groove (411) to complete the fixation; S4. Start the drive source of the conveying unit (3), and the rotating shaft (31) drives the chain and the horizontal plate (32) to move, so as to smoothly send the placement unit (4) into the shell (27) of the drying unit (2); S5. When the hanging rod (5) moves to the drying area, the end friction wheel (51) meshes with the friction strip (21), driving the hanging rod (5) and the workpiece to rotate at a constant speed, and at the same time, the hot air blower is turned on to deliver circulating hot air. S6. Start the drive device. The roller (22) drives the flexible rope (23), tube (24) and absorbent cloth (25) to rotate in a cycle. The absorbent cloth (25) swings to absorb water stains and is simultaneously dried by hot air. S7. The conveying unit (3) sends the placement unit (4) out of the housing (27), takes out the hanging rod (5) from the snap-fit ​​slot (411), and unloads the dried workpiece to complete the entire process.

Images