A method for galvanizing a double-threaded screw rod and a treatment device therefor

Abstract

This invention discloses a method and apparatus for galvanizing double-ended threaded screws. The double-ended threaded screw processing apparatus includes a feeding rack, a circulation rack, and a slide rail. The intermittent material distribution mechanism includes an interference section and a lifting section. The material bar combing mechanism includes an opening section, a combing section, and a releasing section. The combing section includes a combing component and a holding component. The combing component presses the material bar body tightly, and the combing component moves downward to separate the material bars one by one. The double-ended threaded screw galvanizing method includes pre-galvanizing treatment, hot-dip galvanizing, and cooling steps. The beneficial effects of this invention are that by changing the zinc liquid composition, the service life can be increased by 2-3 times. Through the coordinated operation of the intermittent material distribution mechanism and the material bar circulation mechanism, large packages can be automatically divided into small packages, saving a large amount of packing straps, improving unpacking efficiency, and reducing labor output and production costs. The material bar combing mechanism automatically disperses the intersecting and intertwined material bars.

Description

Technical Field

[0001] This invention relates to the field of fastener surface anti-corrosion treatment technology, and more specifically, to a method and apparatus for galvanizing double-threaded screws. Background Technology

[0002] Tie rods are a type of fastener commonly used in steel structures to bear the horizontal load of the purlins at the top of the steel structure. The production process of tie rods involves unpacking, alkaline washing, water washing, acid washing, water washing, fluxing, drying, material sorting, material handling, galvanizing, blowing, and cooling.

[0003] Currently, most galvanized or painted wire strips on the market are produced using either galvanizing or spray painting processes. Galvanized wire strips are bundled into small bundles of about 20 strips, then galvanized at high temperature and centrifuged to remove excess zinc. This method has the following disadvantages: centrifugal galvanizing of wire strips results in numerous scratches or dents on the product surface due to high-speed centrifugation. Additionally, the threads contain a large amount of zinc dross and zinc slag, leading to a low product qualification rate, high zinc ingot consumption, high energy consumption, and serious environmental pollution. Furthermore, the high-temperature galvanizing process causes the zinc layer to appear grayish and dark, affecting the overall galvanizing quality.

[0004] When feeding materials for galvanizing pretreatment, a large bundle of strips (about 100 strips) is broken into several small packages during on-site operation to facilitate more uniform, faster, and higher-quality surface treatment of the strips. This operation has the following drawbacks: 1. The process of manually breaking the large bundle into several small packages is relatively complicated, time-consuming, labor-intensive, and inefficient; in addition, a large amount of additional packing straps are required, which need to be removed later, increasing labor and production costs.

[0005] During the pre-galvanizing process, the small packages are disassembled on-site. To improve the galvanizing quality in subsequent processes, the tie rods need to be separated to ensure better drying and galvanizing results. Due to the tie rods' inherent toughness, after long-distance transport (passing through multiple pickling and alkaline washing tanks), they are prone to tangling and becoming intertwined. Manual separation is necessary, but this method has the following drawbacks: 1. Manual separation is not only inefficient but also poses safety hazards (frequent walking on the transmission chain increases the risk of pinching injuries); 2. Manual movement of the tie rods makes it difficult to control the separation distance between them, which cannot be matched with the subsequent gripping operation of the galvanizing robot. Summary of the Invention

[0006] To address the above deficiencies, this invention provides a method and apparatus for galvanizing double-threaded screws, thereby solving the aforementioned problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method and apparatus for galvanizing double-threaded screws are disclosed. The double-threaded screw processing apparatus includes a screw body, an alkaline washing tank, an acid washing tank, a feeding rack, a circulation rack, and a slide rail. The alkaline washing tank and the acid washing tank are placed side by side, located between the feeding rack and the slide rail. The circulation rack is located above the alkaline washing tank and the acid washing tank. An intermittent material distribution mechanism is installed at the upper end of the feeding rack, a screw circulation mechanism is installed on the circulation rack, and a screw combing mechanism is provided on one side of the slide rail.

[0009] The intermittent material distribution mechanism includes a rebar sorting platform, a U-shaped buffer trough, an interference section, and a lifting section. The rebar sorting platform is rotatably connected to the loading rack. The rebar sorting platform evenly spreads the rebar body. The lifting section reciprocates vertically, lifting the rebar body and moving it into the U-shaped buffer trough. The lifting section then moves the rebar body from the U-shaped buffer trough to the rebar circulation mechanism. The interference section interferes with the rebar circulation mechanism.

[0010] The material bar circulation mechanism includes a first support, a second support, U-shaped blocks, and a limiting part. The first support is located between the alkaline washing tank and the acid washing tank and is arranged horizontally. The second support is located inside the alkaline washing tank and the acid washing tank. There are two second supports, which are parallel to each other and arranged vertically. There are two sets of the first support, the second support, and the feeding rack located on both sides of the acid washing tank. Each of the first support, the second support, and the circulation rack has a sprocket mounted on its side surface. There are multiple sprockets. A chain is mounted on one side of each sprocket. The chain at the feeding rack position is arranged in an U-shape, while the chain at the alkaline washing tank and the acid washing tank position is arranged in an S-shape. There are multiple U-shaped blocks mounted on one side of the chain. The U-shaped blocks are used to hold the material bar body. The limiting part consists of two parts located on both sides of the opening of the U-shaped block. The limiting part can move in opposite directions or in opposite directions. Moving in opposite directions closes the opening of the U-shaped block, while moving in opposite directions opens the opening of the U-shaped block. An interference part drives the limiting part to move, and the limiting part moves cyclically along the chain distribution path.

[0011] The bar combing mechanism includes an opening section, a combing section, and a releasing section. The opening section moves vertically and drives the limiting section to move in opposite directions or backwards. The combing section includes a combing component and a holding component. The holding component is used to position the bar body horizontally. The combing component presses the bar body together, and the bar bodies are arranged horizontally. The combing component moves downward to separate the bar bodies one by one. The combing component moves in the axial direction of the bar body.

[0012] The release section includes a transfer component and a conveying mechanism. The transfer component adsorbs the material bar body and moves the material bar body from the holding component to the conveying mechanism. The transfer component releases the material bar body one by one, and the conveying mechanism increases the spacing between the material bar bodies.

[0013] The method for galvanizing a double-threaded lead screw is characterized by comprising the following steps;

[0014] Step 1, Pre-galvanizing treatment:

[0015] 1. Incoming material unpacking: After verifying the specifications and dimensions, unpack the materials into small packages suitable for pre-processing;

[0016] 2. Alkaline washing: Use an alkaline washing solution with a NaOH concentration of 30-40 g / L to wash the workpiece. The alkaline washing time is 5-20 minutes, and the alkaline washing temperature is 40-60 degrees Celsius. The temperature should be continuously raised and lowered during the alkaline washing process.

[0017] 3. Water washing: After alkaline washing, the workpiece is washed with water to remove saponified oil stains and impurities from the surface and alkaline washing solution. The water washing is repeated at least twice.

[0018] 4. Pickling: Immerse the degreased workpiece in a pickling tank with a hydrochloric acid concentration of 5-23% for rust removal. The pickling time is 5-12 minutes, and the workpiece is continuously raised and lowered during the pickling process.

[0019] 5. Water washing: The first water wash has a pH < 3 to pre-clean the pickling solution and impurities on the surface of the workpiece. The second water wash has a pH > 3 to thoroughly rinse away any remaining impurities on the surface of the workpiece. Each water wash should be performed at least twice.

[0020] 6. Fluxing: Prepare a solution containing ammonium chloride, zinc chloride, and flux pH. Immerse the workpiece in the flux thoroughly, raising and lowering it at least twice. A uniform thickness flux film will form on the workpiece surface. The fluxing temperature is 20-60 degrees Celsius.

[0021] 7. Drying: The workpieces after plating are sorted and loaded, and placed according to the toothed stack. They are then driven into the drying kiln by the chain to dry.

[0022] Step 2, hot-dip galvanizing and cooling:

[0023] 1. Material Sorting: The drying chain rotates, moving the workpieces to the zinc pot. The sorting assembly moves laterally, distributing 8-12 pieces to the pre-galvanizing platform. After the pre-galvanizing platform retrieves the materials, the sorting assembly process is repeated until the next batch of galvanizing is ready.

[0024] 2. Material Retrieval: The robotic arm has 8-12 corresponding robotic arms for material retrieval. After setting the corresponding material retrieval position, the galvanizing machine is started, and the robotic arm motor drives it to the pre-galvanizing platform to retrieve the material.

[0025] 3. Galvanizing: After the robotic arm picks up the material, it moves 8-12 pull rods to the corresponding zinc alloy liquid station 1 material support frame. The V-groove of the material support frame corresponds to each pull rod. After the robotic arm places the pull rods stably, it rises and repeats the picking and placing process to station 2, and then to station 3. The zinc liquid temperature is between 440-475°C. The surface zinc oxide is cleaned every 20 minutes. The zinc alloy composition is: Zinc: 99.974-99.9842%, Nickel: 0.005%-0.01%, Aluminum: 0.01%-0.015%, Rare Earth: 0.0008%-0.001%.

[0026] 4. Blowing: The galvanizing robot moves to the corresponding station, retrieves material from the zinc pot, raises it to the designated height, and then moves it to the guide rail. After ensuring the workpiece contacts the rail, it is raised and the above process is repeated. The workpiece passes through 8-12 air rings along the guide rail.

[0027] a. Two magnetic rollers are placed in front of the air ring to ensure that the workpiece does not shift or interfere with the air ring when it is close to the air ring.

[0028] b. The first track roller after the air ring is a magnetic roller to ensure that the workpiece does not deviate after passing through the air ring and is smoothly driven to the next process by the roller; the air pressure of the air ring is 0.3-0.5Mpa, which is provided by an air compressor; the air blowing angle of the air ring is 60-80 degrees to ensure that the threaded area on the pull bar is thoroughly cleaned; the track roller is equipped with a sensor, which automatically turns off the air blowing after the workpiece passes through;

[0029] 5. Cooling: After the workpiece is coated with molten zinc, when it reaches the end of the runway, the sensor is activated to automatically flip the workpiece to the water tank for cooling. The cooling water tank chain rotates, carrying the cooled galvanized workpiece out of the water tank to the receiving rack.

[0030] 6. Inspection: At the receiving rack, inspect the cleanliness of the zinc layer and threads of the galvanized pull strip, and use the corresponding nut to test the galvanization quality of the threads;

[0031] 7. Packaging: Move the workpiece to the packaging rack, dry it, and then package the workpiece.

[0032] Furthermore, in step one, the drying temperature of the drying kiln is 30-50 degrees Celsius.

[0033] Furthermore, in step two, the cooling water temperature is 20-40 degrees Celsius.

[0034] Furthermore, the lifting unit includes a hydraulic rod 1 installed at one end of the upper surface of the feeding rack. The lower end of the hydraulic rod 1 is hinged to the feeding rack, and the telescopic end of the hydraulic rod 1 is hinged to one end of the rebar sorting platform. The other end of the rebar sorting platform is hinged to the feeding rack. Baffle plates are installed at both ends of the upper surface of the rebar sorting platform. A hydraulic rod 2 is installed on one side of the feeding rack. A trapezoidal plate 1 is installed at the telescopic end of the hydraulic rod 2. The trapezoidal plate 1 is misaligned with the rebar sorting platform. A U-shaped buffer groove is installed on the feeding rack near the trapezoidal plate 1. The U-shaped buffer groove is misaligned with the trapezoidal plate 1. An F-shaped rod 1 is installed on one side of the feeding rack. A guide plate 1 is installed on one side of the F-shaped rod 1. There are two pairs of guide plates 1 with a gap between them. The material bar body falls onto the material bar circulation mechanism through the gap. A secondary moving plate is installed at the lower end of the trapezoidal plate.

[0035] Furthermore, the interference part includes an F-shaped rod II installed at the telescopic end of the hydraulic rod II, and a trapezoidal plate II is installed on the upper end of the F-shaped rod II.

[0036] Furthermore, the limiting part includes circular through holes on both sides of the U-shaped block, a sliding shaft is installed in the circular through holes, limiting grooves are opened on both sides of the circular through holes, limiting blocks are installed on both sides of the sliding shaft and are slidably connected to the limiting grooves, a compression spring is installed between the limiting blocks and the limiting grooves, an inclined surface is provided at one end of the sliding shaft, an interference shaft is installed on the side surface of the sliding shaft, the interference shaft is located at one end of the inclined surface, and the position of the interference shaft corresponds to that of the trapezoidal plate; a drive motor is installed on each of the brackets one, bracket two and the circulation frame, the rotating end of the drive motor is fixedly connected to the sprocket, and the limiting part corresponds to that of the guide plate.

[0037] Furthermore, the opening part includes a hydraulic rod three installed at the lower end of the circulation frame. The hydraulic rod three extends downwards, and a C-shaped rod is installed at the extension end of the hydraulic rod three. A release plate is installed at the upper end of the C-shaped rod, and the position of the release plate corresponds to the interference axis.

[0038] Furthermore, the holding assembly includes three support blocks installed on one side of the circulation rack, arranged in a row. Each support block has grooves at both ends of its upper surface, with a sliding block installed at one end of each groove. An inclined plate is installed on the upper surface of each sliding block, and a compression spring is installed between the sliding block and the groove. The limiting part corresponds to the position of the support block. The combing assembly includes movable blocks installed at both ends of a slide rail, slidably connected to the slide rail. A rotary motor is installed at one end of the slide rail, and a threaded shaft threadedly connected to the movable block is installed at the rotating end of the rotary motor. The threaded shaft has two ends... The threads rotate in opposite directions. A hydraulic cylinder is installed on the upper surface of the moving block. The hydraulic cylinder extends and retracts in the horizontal direction. A hydraulic cylinder is installed at the extension end of the hydraulic cylinder. A hydraulic cylinder is installed at the extension end of the hydraulic cylinder. A hydraulic cylinder is installed at the extension end of the hydraulic cylinder. A connecting plate is installed at the extension end of the hydraulic cylinder. A separating comb is installed on the lower surface of the connecting plate. The separating comb has a conical profile and is composed of multiple vertical plates arranged in a straight line. The vertical plates become shorter from the center to the sides. A contact head is installed at the lower end of the vertical plate. The contact head is offset from the axis of the material bar body.

[0039] Furthermore, the transfer assembly includes a vertical bearing mounted on one side of the support block, a drive shaft mounted on the inner ring of the vertical bearing, a swing plate mounted on one end of the drive shaft, the swing height of the swing plate being higher than the height of the inclined plate, a strong magnet mounted on one end of the swing plate, multiple strong magnets being provided and corresponding one-to-one with the material bar body, a gear one mounted on the other end of the drive shaft, a stepper motor mounted on one side of the support block, a gear two meshing with gear one mounted on the rotating end of the stepper motor; the conveying mechanism is located on one side of the support block, a drive belt mounted on the drive end of the conveying mechanism, a V-shaped groove provided on the outer surface of the drive belt, and a baffle provided on one side of the V-shaped groove.

[0040] Furthermore, a photoelectric switch is installed on the circulation rack.

[0041] The beneficial effects of this invention are: by changing the nickel, magnesium, aluminum and rare earth elements in the zinc alloy liquid, the corrosion resistance of the metal in air is improved. Research shows that by increasing the nickel, magnesium, aluminum and rare earth elements in the zinc alloy, the service life can be increased by 2-3 times under the same coating thickness. Under the same designed service life, the surface coating thickness is reduced by zinc alloy. This process reduces product costs, saves the weight of zinc used, and reduces carbon emissions.

[0042] By combining the intermittent material distribution mechanism and the material bar circulation mechanism, large packages can be automatically divided into small packages, avoiding manual packaging operations, saving a lot of packing straps, improving unpacking efficiency while reducing labor output and production costs.

[0043] The bar sorting mechanism can automatically separate the bar bodies that have crossed and become tangled, meeting subsequent needs while improving sorting efficiency and avoiding frequent manual walking near the transmission chain, thus reducing safety hazards.

[0044] By cooperating with the transfer components through the conveying mechanism, the distance between the material bars can be accurately controlled, which better matches the operation of the tin plating robot and improves the smoothness of the overall equipment operation. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the double-threaded screw galvanizing method and processing device described in this invention;

[0046] Figure 2 This is a schematic diagram of an intermittent material distribution mechanism;

[0047] Figure 3 This is a top view of the intermittent material distribution mechanism. Figure 1 ;

[0048] Figure 4 This is a top view of the intermittent material distribution mechanism. Figure 2 ;

[0049] Figure 5 This is an enlarged schematic diagram of the limiting part;

[0050] Figure 6 This is a schematic diagram of the bar combing mechanism;

[0051] Figure 7 This is a schematic diagram of the components being held.

[0052] Figure 8 This is a top view of the opening section;

[0053] Figure 9 This is a schematic diagram of the support block;

[0054] Figure 10This is a side view of the slide rail;

[0055] Figure 11 This is a top view of the circulation rack;

[0056] Figure 12 This is a schematic diagram of the multiple states of the separating comb;

[0057] Figure 13 This is an enlarged schematic diagram of the separating comb;

[0058] In the diagram, 1. Material bar body; 2. Alkali washing tank; 3. Acid washing tank; 4. Feeding rack; 5. Circulation rack; 6. Slide rail; 7. Rebar sorting platform; 8. U-shaped buffer trough; 9. Interference section; 10. Lifting section; 11. Support 1; 12. Support 2; 13. U-shaped block; 14. Limiting section; 15. Sprocket; 16. Chain; 17. Opening section; 18. Combing section; 19. Release section; 20. Hydraulic rod 1; 21. Baffle plate; 22. Hydraulic rod 2; 23. Trapezoidal plate 1; 24. F-shaped rod 1; 25. Guide plate 1; 26. F-shaped rod 2; 27. Trapezoidal plate 2; 28. Circular through hole; 29. ​​Sliding shaft; 30. Limiting groove; 31. Limiting block; 32. Compression spring 1; 33. Inclined surface 1; 34. Inclined surface 2; 3 5. Interference axis; 36. Drive motor; 37. Hydraulic rod three; 38. C-shaped rod; 39. Release plate; 40. Support block; 41. Slide groove; 42. Sliding block; 43. Inclined plate; 44. Compression spring two; 45. Moving block; 46. Rotary motor; 47. Threaded shaft; 48. Hydraulic cylinder one; 49. Hydraulic cylinder two; 50. Hydraulic cylinder three; 51. Pressure plate; 52. Connecting plate; 53. Separating comb; 54. Vertical plate; 55. Contact head; 56. Vertical bearing; 57. Drive shaft; 58. Swing plate; 59. Strong magnet; 60. Gear one; 61. Stepper motor; 62. Gear two; 63. Conveying mechanism; 64. Drive belt; 65. V-groove; 66. Baffle; 67. Photoelectric switch; 68. Secondary moving plate. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0060] The method for galvanizing double-threaded screws includes the following steps;

[0061] Step 1, Pre-galvanizing treatment:

[0062] 1. Incoming material unpacking: After verifying the specifications and dimensions, unpack the materials into small packages suitable for pre-processing;

[0063] 2. Alkaline washing: Use an alkaline washing solution with a NaOH concentration of 30-40 g / L to wash the workpiece. The alkaline washing time is 5-20 minutes, and the alkaline washing temperature is 40-60 degrees Celsius. The temperature should be continuously raised and lowered during the alkaline washing process.

[0064] 3. Water washing: After alkaline washing, the workpiece is washed with water to remove saponified oil stains and impurities from the surface and alkaline washing solution. The water washing is repeated at least twice.

[0065] 4. Pickling: Immerse the degreased workpiece in a pickling tank with a hydrochloric acid concentration of 5-23% for rust removal. The pickling time is 5-12 minutes, and the workpiece is continuously raised and lowered during the pickling process.

[0066] 5. Water washing: The first water wash has a pH < 3 to pre-clean the pickling solution and impurities on the surface of the workpiece. The second water wash has a pH > 3 to thoroughly rinse away any remaining impurities on the surface of the workpiece. Each water wash should be performed at least twice.

[0067] 6. Fluxing: Prepare a flux with ammonium chloride (140-260g / L), zinc chloride (40-160g / L) and a pH of 4-5. Immerse the workpiece in the flux thoroughly, and lift it up and down at least twice. A uniform thickness flux film is formed on the surface of the workpiece. The fluxing temperature is 20-60 degrees Celsius.

[0068] 7. Drying: The workpieces after plating are sorted and loaded, and placed according to the toothed stack. They are then driven into the drying kiln by the chain to dry.

[0069] Step 2, hot-dip galvanizing and cooling:

[0070] 1. Material Sorting: The drying chain rotates, moving the workpieces to the zinc pot. The sorting assembly moves laterally, distributing 8-12 pieces to the pre-galvanizing platform. After the pre-galvanizing platform retrieves the materials, the sorting assembly process is repeated until the next batch of galvanizing is ready.

[0071] 2. Material Retrieval: The robotic arm has 8-12 corresponding robotic arms for material retrieval. After setting the corresponding material retrieval position, the galvanizing machine is started, and the robotic arm motor drives it to the pre-galvanizing platform to retrieve the material.

[0072] 3. Galvanizing: After the robotic arm picks up the material, it moves 8-12 pull rods to the corresponding zinc alloy liquid station 1 material support frame. The V-groove of the material support frame corresponds to each pull rod. After the robotic arm places the pull rods stably, it rises and repeats the picking and placing process to station 2, and then to station 3. The zinc liquid temperature is between 440-475°C. The surface zinc oxide is cleaned every 20 minutes. The zinc alloy composition is: Zinc: 99.974-99.9842%, Nickel: 0.005%-0.01%, Aluminum: 0.01%-0.015%, Rare Earth: 0.0008%-0.001%.

[0073] 4. Blowing: The galvanizing robot moves to the corresponding station, retrieves material from the zinc pot, raises it to the designated height, and then moves it to the guide rail. After ensuring the workpiece contacts the rail, it is raised and the above process is repeated. The workpiece passes through 8-12 air rings along the guide rail.

[0074] a. Two magnetic rollers are placed in front of the air ring to ensure that the workpiece does not shift or interfere with the air ring when it is close to the air ring.

[0075] b. The first track roller after the air ring is a magnetic roller to ensure that the workpiece does not deviate after passing through the air ring and is smoothly driven to the next process by the roller; the air pressure of the air ring is 0.3-0.5Mpa, which is provided by an air compressor; the air blowing angle of the air ring is 60-80 degrees to ensure that the threaded area on the pull bar is thoroughly cleaned; the track roller is equipped with a sensor, which automatically turns off the air blowing after the workpiece passes through;

[0076] 5. Cooling: After the workpiece is coated with molten zinc, when it reaches the end of the runway, the sensor is activated to automatically flip the workpiece to the water tank for cooling. The cooling water tank chain rotates, carrying the cooled galvanized workpiece out of the water tank to the receiving rack.

[0077] 6. Inspection: At the receiving rack, inspect the cleanliness of the zinc layer and threads of the galvanized pull strip, and use the corresponding nut to test the galvanization quality of the threads;

[0078] 7. Packaging: Move the workpiece to the packaging rack, dry it, and then package the workpiece.

[0079] As an improvement to the above technical solution, the drying temperature of the drying kiln is 30-50 degrees Celsius.

[0080] As an improvement to the above technical solution, in step two, the cooling water temperature is 20-40 degrees Celsius.

[0081] Specifically, let's take the galvanizing method for double-threaded lead screws as an example;

[0082] The first preferred step is as follows: specifically, it includes the following steps;

[0083] Step 1, Pre-galvanizing treatment:

[0084] 1. Incoming material unpacking: After verifying the specifications and dimensions, unpack the materials into small packages suitable for pre-processing;

[0085] 2. Alkaline washing: Use an alkaline washing solution with a NaOH concentration of 30g / L to wash the workpiece for 5 minutes at a temperature of 40 degrees Celsius, with the temperature constantly rising and falling during the washing process;

[0086] 3. Water washing: After alkaline washing, the workpiece is washed with water to remove saponified oil stains and impurities from the surface and alkaline washing solution. The water washing is repeated at least twice.

[0087] 4. Pickling: Immerse the degreased workpiece in a 5% hydrochloric acid pickling tank for rust removal. The pickling time is 5 minutes, and the workpiece is continuously raised and lowered during the pickling process.

[0088] 5. Water washing: First water wash pH1, to pre-clean the pickling solution and impurities on the surface of the workpiece; second water wash pH3.1, to thoroughly rinse away any remaining impurities on the surface of the workpiece; each water wash should be performed at least twice.

[0089] 6. Fluxing: Prepare a flux containing ammonium chloride (140g / L), zinc chloride (40g / L) and pH (4). Immerse the workpiece in the flux thoroughly, and lift it up and down at least twice. A uniform thickness flux film is formed on the surface of the workpiece. The fluxing temperature is 20 degrees Celsius.

[0090] 7. Drying: The workpieces after plating are sorted and loaded, and placed according to the toothed stack. They are then driven into the drying kiln by the chain to dry.

[0091] Step 2, hot-dip galvanizing and cooling:

[0092] 1. Material Sorting: The drying chain rotates, moving the workpieces to the zinc pot. The sorting assembly then moves laterally, distributing 10 pieces to the pre-galvanizing platform. After the pre-galvanizing platform retrieves the materials, the sorting assembly process is repeated until the next batch of galvanizes.

[0093] 2. Material Retrieval: The robotic arm has 10 corresponding robotic arms for material retrieval. After setting the corresponding material retrieval position, the galvanizing machine is started, and the robotic arm motor drives it to the pre-galvanizing platform to retrieve the material.

[0094] 3. Galvanizing: After the robotic arm picks up the material, it moves 8-12 pull rods to the corresponding zinc alloy liquid station 1 material support frame. The V-groove of the material support frame corresponds to each pull rod. After the robotic arm places the pull rods stably, it rises up and repeats the picking and unloading process to station 2, and then to station 3. The zinc liquid temperature is between 440°C. The surface zinc oxide is cleaned every 20 minutes. The zinc alloy composition is: zinc: 99.974%, nickel: -0.01%, aluminum: 0.015%, rare earth: 0.001%.

[0095] 4. Blowing: The galvanizing robot moves to the corresponding station, retrieves material from the zinc pot, raises it to the designated height, and then moves it to the guide rail. After ensuring the workpiece contacts the rail, it is raised and the above process is repeated. The workpiece passes through 10 air rings along the guide rail.

[0096] a. Two magnetic rollers are placed in front of the air ring to ensure that the workpiece does not shift or interfere with the air ring when it is close to the air ring.

[0097] b. The first track roller after the air ring is a magnetic roller to ensure that the workpiece does not deviate after passing through the air ring and is smoothly driven to the next process by the roller; the air pressure of the air ring is 0.3Mpa, which is provided by an air compressor; the air ring blowing angle is 60 degrees to ensure that the threaded position on the pull bar is thoroughly cleaned; the track roller is equipped with a sensor, which automatically turns off the blowing after the workpiece passes through.

[0098] 5. Cooling: After the workpiece is coated with molten zinc, when it reaches the end of the runway, the sensor is activated to automatically flip the workpiece to the water tank for cooling. The cooling water tank chain rotates, carrying the cooled galvanized workpiece out of the water tank to the receiving rack.

[0099] 6. Inspection: At the receiving rack, inspect the cleanliness of the zinc layer and threads of the galvanized pull strip, and use the corresponding nut to test the galvanization quality of the threads;

[0100] 7. Packaging: Move the workpiece to the packaging rack, dry it, and then package the workpiece.

[0101] As an improvement to the above technical solution, in step one, the drying temperature of the drying kiln is 30 degrees Celsius.

[0102] As an improvement to the above technical solution, in step two, the cooling water temperature is 20 degrees Celsius.

[0103] The second optimization step is as follows:

[0104] Step 1, Pre-galvanizing treatment:

[0105] 1. Incoming material unpacking: After verifying the specifications and dimensions, unpack the materials into small packages suitable for pre-processing;

[0106] 2. Alkaline washing: Use an alkaline washing solution with a NaOH concentration of 40g / L to wash the workpiece for 20 minutes at a temperature of 60 degrees Celsius, with the temperature constantly rising and falling during the washing process;

[0107] 3. Water washing: After alkaline washing, the workpiece is washed with water to remove saponified oil stains and impurities from the surface and alkaline washing solution. The water washing is repeated at least twice.

[0108] 4. Pickling: Immerse the degreased workpiece in a pickling tank with a hydrochloric acid concentration of 23% for rust removal. The pickling time is 12 minutes, and the workpiece is continuously raised and lowered during the pickling process.

[0109] 5. Water washing: The first water wash has a pH of <3 to pre-clean the pickling solution and impurities on the surface of the workpiece. The second water wash has a pH of 6.5 to thoroughly rinse away any remaining impurities on the surface of the workpiece. Each water wash should be performed at least twice.

[0110] 6. Fluxing: Prepare a flux with ammonium chloride (260g / L), zinc chloride (160g / L) and pH (5). Immerse the workpiece in the flux thoroughly, and lift it up and down at least twice. A uniform thickness flux film is formed on the surface of the workpiece. The fluxing temperature is 60 degrees Celsius.

[0111] 7. Drying: The workpieces after plating are sorted and loaded, and placed according to the toothed stack. They are then driven into the drying kiln by the chain to dry.

[0112] Step 2, hot-dip galvanizing and cooling:

[0113] 1. Material Sorting: The drying chain rotates, moving the workpieces to the zinc pot. The sorting assembly then moves laterally, distributing 12 pieces to the pre-galvanizing platform. After the pre-galvanizing platform retrieves the materials, the sorting assembly process is repeated until the next batch is ready for galvanizing.

[0114] 2. Material Retrieval: The robotic arm has 12 corresponding robotic arms for material retrieval. After setting the corresponding material retrieval position, the galvanizing machine is started, and the robotic arm motor drives it to the pre-galvanizing platform to retrieve the material.

[0115] 3. Galvanizing: After the robotic arm picks up the material, it moves 12 pull rods to the corresponding zinc alloy liquid station 1 material support frame. The V-grooves of the material support frame correspond one-to-one with the pull rods. After the robotic arm places the pull rods stably, it rises up and repeats the picking and unloading process to station 2, and then to station 3. The zinc liquid temperature is between 475°C. The surface zinc oxide is cleaned every 20 minutes. The zinc alloy composition is: zinc: 99.9842%, nickel: 0.005%, aluminum: 0.01%, rare earth: 0.0008%.

[0116] 4. Blowing: The galvanizing robot moves to the corresponding station, retrieves material from the zinc pot, raises it to the designated height, and then moves it to the guide rail. After ensuring the workpiece contacts the rail, it is raised again, and the above process is repeated. The workpiece passes through 12 air rings along the guide rail.

[0117] a. Two magnetic rollers are placed in front of the air ring to ensure that the workpiece does not shift or interfere with the air ring when it is close to the air ring.

[0118] b. The first track roller after the air ring is a magnetic roller to ensure that the workpiece does not deviate after passing through the air ring and is smoothly driven to the next process by the roller; the air pressure of the air ring is 0.5Mpa, which is provided by an air compressor; the air ring blowing angle is 80 degrees to ensure that the threaded position on the pull strip is thoroughly cleaned; the track roller is equipped with a sensor, which automatically turns off the air blowing after the workpiece passes through.

[0119] 5. Cooling: After the workpiece is coated with molten zinc, when it reaches the end of the runway, the sensor is activated to automatically flip the workpiece to the water tank for cooling. The cooling water tank chain rotates, carrying the cooled galvanized workpiece out of the water tank to the receiving rack.

[0120] 6. Inspection: At the receiving rack, inspect the cleanliness of the zinc layer and threads of the galvanized pull strip, and use the corresponding nut to test the galvanization quality of the threads;

[0121] 7. Packaging: Move the workpiece to the packaging rack, dry it, and then package the workpiece.

[0122] As an improvement to the above technical solution, in step one, the drying temperature of the drying kiln is 50 degrees Celsius.

[0123] As an improvement to the above technical solution, in step two, the cooling water temperature is 40 degrees Celsius.

[0124] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-13 As shown, the double-ended threaded screw processing device includes a material bar body 1, an alkaline washing tank 2, an acid washing tank 3, a feeding frame 4, a circulation frame 5, and a slide rail 6. The alkaline washing tank 2 and the acid washing tank 3 are placed side by side, located between the feeding frame 4 and the slide rail 6. The circulation frame 5 is located above the alkaline washing tank 2 and the acid washing tank 3. An intermittent material distribution mechanism is installed at the upper end of the feeding frame 4, a material bar circulation mechanism is installed on the circulation frame 5, and a material bar combing mechanism is provided on one side of the slide rail 6.

[0125] The intermittent material distribution mechanism includes a rebar sorting platform 7, a U-shaped buffer trough 8, an interference section 9, and a lifting section 10. The rebar sorting platform 7 is rotatably connected to the loading rack 4. The rebar sorting platform 7 evenly spreads out the material bar body 1. The lifting section 10 moves back and forth in the vertical direction, lifting the material bar body 1 and moving it into the U-shaped buffer trough 8. The lifting section 10 then moves the material bar body 1 from the U-shaped buffer trough 8 to the material bar circulation mechanism. The interference section 9 interferes with the material bar circulation mechanism.

[0126] The material bar circulation mechanism includes a first support 11, a second support 12, a U-shaped block 13, and a limiting part 14. The first support 11 is located between the alkaline washing tank 2 and the acid washing tank 3 and is arranged horizontally. The second support 12 is located inside the alkaline washing tank 2 and the acid washing tank 3. There are two second supports 12, which are parallel to each other and arranged vertically. The first support 11, the second support 12, and the feeding rack 4 are arranged in two sets on both sides of the acid washing tank 3. The side surfaces of the first support 11, the second support 12, and the circulation rack 5 are each equipped with a sprocket 15. There are multiple sprockets 15, and one side of each sprocket 15 is equipped with a... The chain 16 is installed in a U-shape at the feeding rack 4 position, and in an S-shape at the alkaline washing tank 2 and acid washing tank 3 positions. Multiple U-shaped blocks 13 are installed on one side of the chain 16 and are used to hold the material bar body 1. The limiting part 14 is divided into two parts and located on both sides of the opening of the U-shaped block 13. The limiting part 14 can move in opposite directions or in opposite directions. Moving in opposite directions closes the opening of the U-shaped block 13, and moving in opposite directions opens the opening of the U-shaped block 13. The interference part 9 drives the limiting part 14 to move, and the limiting part 14 moves cyclically along the distribution path of the chain 16.

[0127] The bar combing mechanism includes an opening part 17, a combing part 18, and a releasing part 19. The opening part 17 moves in the vertical direction and drives the limiting part 14 to move in opposite directions or backwards. The combing part 18 includes a combing component and a holding component. The holding component is used to position the bar body 1 at a horizontal position. The combing component presses the bar body 1, and the bar body 1 is arranged horizontally. The combing component moves down to separate the bar body 1 one by one. The combing component moves in the axial direction of the bar body 1.

[0128] The release unit 19 includes a transfer component and a conveying mechanism 63. The transfer component adsorbs the material bar body 1 and moves the material bar body 1 from the holding component to the conveying mechanism 63. The transfer component releases the material bar body 1 one by one, and the conveying mechanism 63 increases the spacing between the material bar bodies 1.

[0129] In practical applications, this device is suitable for bar bodies 1 with a length of about 4 meters. If the bar body 1 is too long, its toughness increases and it is not easy to move. The steel bar sorting platform 7 in this device is existing technology, so it will not be described in detail. For example, the patent with application number CN201910851496.6 uses sprockets 16 and chains 17 made of corrosion-resistant and acid-alkali-resistant materials. For ease of understanding, only one alkaline washing tank 2 and acid washing tank 3 are shown in this device. Multiple alkaline washing tanks 2 and acid washing tanks 3 can be customized according to actual needs. In addition, a water washing tank is also required.

[0130] During the pre-galvanizing process, the bundled bar body 1 is manually moved to the rebar sorting platform 7 using external equipment. The bar body 1 is then released manually, scattering onto the rebar sorting platform 7. The vibration of the rebar sorting platform 7 keeps the bar body 1 in a horizontal position. If any bar body 1 is misaligned, it can be manually straightened. After the bar body 1 is scattered, the hydraulic rod 22 is extended, causing one end of the rebar sorting platform 7 to tilt. When one end of the rebar sorting platform 7 is missing bar body 1, it can be automatically replenished.

[0131] Then, the lifting unit 10 is controlled to work. When the lifting unit 10 moves upward, it will push a specified number of material bar bodies 1 to the upper right, such as... Figure 2 As shown, the lifting section 10 is about to reach its highest point. This device can lift 8 material bar bodies 1 into the U-shaped buffer groove 8 at once. As the lifting section 10 continues to extend, the material bar bodies 1 in the U-shaped buffer groove 8 can be moved into the limiting section 14 through the guide plate 25. When the limiting section 14 is directly below the guide plate 25, the lifting section 10 will drive the interference section 9 to move and open the limiting section 14, making it easier for the material bar bodies 1 to move into the limiting section 14.

[0132] The photoelectric switch 67 can be used to position the limiting part 14 to avoid large deviations. When the limiting part 14 is filled with the material bar body 1, the material bar circulation mechanism is controlled to work, such as... Figure 1 As shown, the material bar circulation mechanism drives the limiting part 14 to circulate counterclockwise. Starting from the position of the guide plate 25, the limiting part 14 moves downward and makes a short turn before entering the alkaline washing tank 2 for alkaline washing. Through the distribution of the support 12 and the sprocket 15, the material bar body 1 moves up and down repeatedly in the alkaline washing tank 2. Then, through the support 11, it moves to the acid washing tank 3 and moves up and down repeatedly. After leaving the acid washing tank 3, it is in a horizontal state. Through the sensing of the photoelectric switch 67, when the limiting part 14 moves directly below the photoelectric switch 67, the material bar circulation mechanism is controlled to stop circulating and perform the material feeding operation. After the material feeding is completed, it moves to the upper end of the circulation frame 5 and is reset to facilitate the filling. Through the action of multiple limiting parts 14, multiple material bar bodies 1 are intermittently pre-treated.

[0133] When the limiting part 14 moves directly below the photoelectric switch 67, the opening part 17 is controlled to operate. The opening part 17 opens the opening of the U-shaped block 13, allowing the material bar body 1 to fall onto the upper surface of the support block 40. Through the action of the holding component, multiple material bar bodies 1 are positioned in a relatively central position on the support block 40. Then, the combing component is controlled to operate. The combing component drives the separating comb 53 to move to the right until it moves directly above the support block 4. At this time, there is a pair of separating combs 53, which are positioned near the center of the material bar body 1. The combing component first drives the pressure plate 51 to move down, so that the material bar body 1 is in a flat state. Then, it drives the separating comb 53 to press down, separating the material bar body 1 one by one. As the combing component moves in the axial direction of the material bar body 1, it prevents the material bar bodies 1 from crossing each other. Then, the combing component is controlled to reset, which is convenient for the next group to work.

[0134] Finally, the transfer component is controlled to work. The transfer component first adsorbs the material bar body 1, then rotates it at a certain angle, and finally releases the material bar body 1 one by one from bottom to top. Under the action of gravity, the material bar body 1 moves one by one onto the conveying mechanism 63. The relatively fast linear speed of the conveying mechanism 63 makes the material bar body 1 have a large gap, which is convenient for subsequent galvanizing treatment. The conveying mechanism 63 has an independent drive system.

[0135] Reference Figure 1 , Figure 2 and Figure 3The lifting unit 10 includes a hydraulic rod 20 installed at one end of the upper surface of the loading rack 4. The lower end of the hydraulic rod 20 is hinged to the loading rack 4, and the telescopic end of the hydraulic rod 20 is hinged to one end of the rebar sorting platform 7. The other end of the rebar sorting platform 7 is hinged to the loading rack 4. Baffle plates 21 are installed at both ends of the upper surface of the rebar sorting platform 7. A hydraulic rod 22 is installed on one side of the loading rack 4. A trapezoidal plate 23 is installed at the telescopic end of the hydraulic rod 22. The trapezoidal plate 23 is connected to the rebar sorting platform 4. Platform 7 is in a misaligned state. U-shaped buffer trough 8 is installed on the side of the feeding rack 4 near the trapezoidal plate 23. U-shaped buffer trough 8 and trapezoidal plate 23 are in a misaligned state. F-shaped rod 24 is installed on one side of the feeding rack 4. Guide plate 25 is installed on one side of F-shaped rod 24. There are two pairs of guide plates 25. There is a gap between the guide plates 25. The material bar body 1 falls onto the material bar circulation mechanism through the gap. A secondary moving plate 68 is installed at the lower end of trapezoidal plate 23.

[0136] In practical applications, the hydraulic rod 20 extends, causing the trapezoidal plate 23 to move upward. The uppermost end of the trapezoidal plate 23 has a sharp structure, and the inclined surface of the trapezoidal plate 23 faces the side of the U-shaped buffer groove 8. When the trapezoidal plate 23 lifts the material bar body 1 upward, while preventing the remaining material bar body 1 from moving, the material bar body 1 directly above the trapezoidal plate 23 can be moved into the U-shaped buffer groove 8. Through the continuous rise of the trapezoidal plate 23, the material bar body 1 in the U-shaped buffer groove 8 can be moved into the U-shaped block 13. Afterward, the hydraulic rod 20 shortens. When the height of the trapezoidal plate 23 is less than the upper surface of the steel bar sorting platform 7, the material bar body 1 rolls to the side of the U-shaped buffer groove 8 under the action of gravity, realizing automatic material replenishment. By controlling the lateral length of the trapezoidal plate 23, the number of material bar bodies 1 lifted by the trapezoidal plate 23 at one time can be changed.

[0137] Reference Figure 1 , Figure 2 and Figure 3 The interference part 9 includes an F-shaped rod 26 installed at the telescopic end of the hydraulic rod 22, and a trapezoidal plate 27 is installed on the upper end of the F-shaped rod 26.

[0138] In practical applications, before the material bar body 1 falls into the U-shaped block 13, the hydraulic rod 20 extends and drives the F-shaped rod 26 and the trapezoidal plate 27 to contact the interference axis 35. Through the vertical movement of the inclined surface of the trapezoidal plate 27, the opening of the U-shaped block 13 is opened, which facilitates the falling of the material bar body 1.

[0139] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5The limiting part 14 includes circular through holes 28 on both sides of the U-shaped block 13. A sliding shaft 29 is installed in the circular through holes 28. Limiting grooves 30 are opened on both sides of the circular through holes 28. Limiting blocks 31 that are slidably connected to the limiting grooves 30 are installed on both sides of the sliding shaft 29. A compression spring 32 is installed between the limiting block 31 and the limiting groove 30. One end of the sliding shaft 29 is provided with an inclined surface 33. An interference shaft 35 is installed on the side surface of the sliding shaft 29. The interference shaft 35 is located at one end of the inclined surface 34. The position of the interference shaft 35 corresponds to that of the trapezoidal plate 2. A drive motor 36 is installed on each of the bracket 11, bracket 2 12 and the circulation frame 5. The rotating end of the drive motor 36 is fixedly connected to the sprocket 15. The limiting part 14 corresponds to that of the guide plate 25.

[0140] In practical applications, the inclined surface of trapezoidal plate 27 contacts the interference axis 35 first. Trapezoidal plate 27 is located between the two interference axes 35, with the inclined surface of trapezoidal plate 27 facing the interference axis 35. When trapezoidal plate 27 moves upward, it drives the interference axis 35 to move in the opposite direction. The movement of the interference axis 35 drives the sliding shaft 29 to move in the opposite direction. The movement of the sliding shaft 29 opens the opening of the U-shaped block 13. Through the action of the compression spring 32, when the interference part 9 moves downward, it drives the sliding shaft 29 to automatically reset.

[0141] Multiple drive motors 36 are provided and located in different positions. The rotation of the drive motors 36 drives the sprocket 15, and the rotation of the sprocket 15 drives the limiting part 14 to rotate in a cycle.

[0142] Reference Figure 4 and Figure 6 The opening part 17 includes a hydraulic rod 37 installed at the lower end of the circulation frame 5. The hydraulic rod 37 extends downwards. A U-shaped rod 38 is installed at the extension end of the hydraulic rod 37. A release plate 39 is installed at the upper end of the U-shaped rod 38. The position of the release plate 39 corresponds to that of the interference axis 35.

[0143] In practical applications, when the photoelectric switch 67 senses the U-shaped block 13 and moves the material bar body 1 to directly above the support block 40, the control hydraulic rod 37 shortens. The shortening of the hydraulic rod 37 causes the release plate 39 to contact the interference axis 35. Through the shape setting of the release plate 39, the movement of the release plate 39 can open the sliding shaft 29, and the material bar body 1 falls onto the upper surface of the support block 40 under the action of gravity.

[0144] Reference Figures 1-13As shown, the holding component includes a support block 40 installed on one side of the circulation rack 5. Three support blocks 40 are arranged in a row. Slide grooves 41 are formed at both ends of the upper surface of each support block 40. A sliding block 42 is installed at one end of each slide groove 41. An inclined plate 43 is installed on the upper surface of the sliding block 42. A compression spring 44 is installed between the sliding block 42 and the slide groove 41. The limiting part 14 corresponds to the position of the support block 40. The combing component includes movable blocks 45 installed at both ends of a slide rail 6. The movable blocks 45 are slidably connected to the slide rail 6. A rotary motor 46 is installed at one end of the slide rail 6. A threaded shaft 47, threadedly connected to the movable blocks 45, is installed at the rotating end of the rotary motor 46. The threaded shaft 47 has threads at both ends. Conversely, a hydraulic cylinder 48 is mounted on the upper surface of the moving block 45. The hydraulic cylinder 48 extends and retracts in the horizontal direction. A hydraulic cylinder 49 and a hydraulic cylinder 50 are mounted on the extension and retraction ends of the hydraulic cylinder 48. The hydraulic rods 22 and 50 extend and retract in the vertical direction. A pressure plate 51 is mounted on the extension and retraction end of the hydraulic cylinder 49. A connecting plate 52 is mounted on the extension and retraction end of the hydraulic cylinder 50. A separating comb 53 is mounted on the lower surface of the connecting plate 52. The separating comb 53 has a conical outline and is composed of multiple vertical plates 54. The vertical plates 54 are arranged in a straight line and become shorter from the center to the sides. A contact head 55 is mounted on the lower end of the vertical plate 54. The contact head 55 is offset from the axis of the material bar body 1.

[0145] In practical applications, when the material bar body 1 falls, the inclined plate 43 and the compression spring 44 guide the material bar body 1 to the center of the support block 40. In this device, the spacing of the inclined plates 43 is 8 times the distance of the material bar body 1, which can accommodate 8 material bar bodies 1. The hydraulic cylinder 48 extends, which moves the pressure plate 51 and the connecting plate 52 to directly above the material bar body 1. First, the hydraulic cylinder 49 extends, which moves the pressure plate 51 downward until the multiple material bar bodies 1 are in a horizontal arrangement. At this time, the pressure plate 51 presses the center of the material bar body 1. Then, the hydraulic cylinder 50 extends, which moves the connecting plate 52 and the separating comb 53 downward. The downward movement of the separating comb 53 can separate the horizontally distributed material bar bodies 1. As the spacing of the material bar bodies 1 gradually increases, the compression spring 44 is compressed. (Detailed state of the separating comb 53 inserting into the material bar body 1 is as follows) Figure 12 As shown, Figure 12 From top to bottom, the states are 1, 2, 3, and 4. In state 1, the vertical plate 54 in the middle position is inserted into the middle position of the 8 material bar bodies 1, which divides the 8 material bar bodies 1 into two groups, left and right, and moves a distance equal to the thickness of the vertical plate 54. In state 2, the vertical plate 54 is inserted into the gaps of the material bar bodies 1 on both sides near the middle position. As the vertical plate 54 continues to move downward, all the material bar bodies 1 can be in a separated state. At this time, the two separating combs 53 are located on both sides of the middle support block 40.

[0146] Then, the rotary motor 46 is controlled to rotate, which drives the moving block 45 to move in the opposite direction, so that the separating comb 53 moves to the position of the two end support blocks 40. At this time, the material bar body 1 can be completely separated to avoid the material bar body 1 from crossing. Then, the rotary motor 46, hydraulic cylinder 1 48, hydraulic cylinder 2 49 and pressure cylinder 3 50 are controlled to reset. The elastic force of the compression spring 2 44 can make the separated material bar body 1 close to each other and centered. At this time, the position of the material bar body 1 is in a fixed state.

[0147] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The transfer assembly includes a vertical bearing 56 mounted on one side of the support block 40, a drive shaft 57 mounted on the inner ring of the vertical bearing 56, a swing plate 58 mounted on one end of the drive shaft 57, the swing height of the swing plate 58 being higher than the height of the inclined plate 43, a strong magnet 59 mounted on one end of the swing plate 58, multiple strong magnets 59 being provided and corresponding one-to-one with the material bar body 1, a gear 60 mounted on the other end of the drive shaft 57, a stepper motor 61 mounted on one side of the support block 40, a gear 62 meshing with the gear 60 mounted on the rotating end of the stepper motor 61; a conveying mechanism 63 located on one side of the support block 40, a drive belt 64 mounted on the drive end of the conveying mechanism 63, a V-groove 65 on the outer surface of the drive belt 64, and a baffle 66 on one side of the V-groove 65.

[0148] In practical applications, stepper motor 61 is controlled to rotate, which drives gear 2 62 to rotate, which in turn drives gear 1 60 to rotate, which in turn drives the swing plate 58 to a horizontal position. At this time, all strong magnets 58 are energized, and the strong magnets 58 attract all the material bar bodies 1. Then, stepper motor 61 is controlled to rotate, which indirectly drives the material bar bodies 1 to a tilted state. After that, the strong magnets 58 are controlled to release the material bar bodies 1 one by one from bottom to top, so that the material bar bodies 1 roll one by one onto the conveying mechanism 63.

[0149] The rotation speed of the conveying mechanism 63 is controlled so that each bar body 1 can fall into the V-groove 65. The baffle 66 can prevent the bar body 1 from rolling excessively.

[0150] Reference Figure 1 A photoelectric switch 67 is installed on the circulation rack 5.

[0151] In practical applications, the photoelectric switch 67 can be used to more accurately determine the specific position of the limiting part 14.

[0152] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0154] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0155] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0156] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0157] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0158] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A galvanizing treatment device for a double-ended threaded screw, comprising a bar body (1), an alkaline washing tank (2), an acid washing tank (3), a feeding rack (4), a circulation rack (5), and a slide rail (6), wherein the alkaline washing tank (2) and the acid washing tank (3) are placed side by side, the alkaline washing tank (2) and the acid washing tank (3) are located between the feeding rack (4) and the slide rail (6), and the circulation rack (5) is located above the alkaline washing tank (2) and the acid washing tank (3); characterized in that an intermittent material distribution mechanism is installed at the upper end of the feeding rack (4), a bar circulation mechanism is installed on the circulation rack (5), and a bar combing mechanism is provided on one side of the slide rail (6); The intermittent material distribution mechanism includes a steel bar sorting platform (7), a U-shaped buffer trough (8), an interference part (9), and a lifting part (10). The steel bar sorting platform (7) is rotatably connected to the loading rack (4). The steel bar sorting platform (7) spreads the bar body (1) evenly. The lifting part (10) moves back and forth in the vertical direction, lifting the bar body (1) and moving it into the U-shaped buffer trough (8). The lifting part (10) moves the bar body (1) from the U-shaped buffer trough (8) to the bar circulation mechanism. The interference part (9) interferes with the bar circulation mechanism. The material bar circulation mechanism includes a first support (11), a second support (12), a U-shaped block (13), and a limiting part (14). The first support (11) is located between the alkaline washing tank (2) and the acid washing tank (3) and is arranged horizontally. The second support (12) is located inside the alkaline washing tank (2) and the acid washing tank (3). There are two second supports (12) that are parallel to each other and arranged vertically. The first support (11), the second support (12), and the feeding rack (4) are arranged in two sets and are located on both sides of the acid washing tank (3). Each of the side surfaces of the first support (11), the second support (12), and the circulation rack (5) is equipped with a sprocket (15). There are multiple sprockets (15). 5) A chain (16) is installed on one side. The chain (16) at the position of the feeding rack (4) is distributed in an octagonal shape. The chain (16) at the positions of the alkaline washing tank (2) and the acid washing tank (3) is distributed in an S-shape. A U-shaped block (13) is installed on one side of the chain (16) and there are multiple U-shaped blocks (13). The U-shaped block (13) is used to hold the material bar body (1). The limiting part (14) is divided into two parts and is located on both sides of the opening of the U-shaped block (13). The limiting part (14) moves in opposite directions or in opposite directions. Moving in opposite directions closes the opening of the U-shaped block (13), and moving in opposite directions opens the opening of the U-shaped block (13). The interference part (9) drives the limiting part (14) to move. The limiting part (14) moves cyclically along the distribution path of the chain (16). The bar combing mechanism includes an opening part (17), a combing part (18), and a release part (19). The opening part (17) moves in the vertical direction and drives the limiting part (14) to move in opposite directions or backwards. The combing part (18) includes a combing component and a holding component. The holding component is used to position the bar body (1) at a horizontal position. The combing component presses the bar body (1) together. The bar bodies (1) are arranged horizontally. The combing component moves down to separate the bar bodies (1) one by one. The combing component moves in the axial direction of the bar body (1). The release part (19) includes a transfer component and a conveying mechanism (63). The transfer component adsorbs the material bar body (1) and moves the material bar body (1) from the holding component to the conveying mechanism (63). The transfer component releases the material bar body (1) one by one, and the conveying mechanism (63) increases the spacing between the material bar bodies (1). The method for galvanizing a double-threaded lead screw is characterized by comprising the following steps; Step 1, Pre-galvanizing treatment: 1) Incoming material unpacking: After verifying the specifications and dimensions, unpack the materials into small packages suitable for pre-processing; 2) Alkaline washing: Use an alkaline washing solution with a NaOH concentration of 30-40 g / L to wash the workpiece. The alkaline washing time is 5-20 minutes and the alkaline washing temperature is 40-60 degrees Celsius. The temperature should be continuously raised and lowered during the alkaline washing process. 3) Water washing: After alkaline washing, the workpiece is washed with water to remove saponified oil stains and impurities from the surface and alkaline washing solution. The water washing is repeated at least twice. 4) Pickling: Immerse the degreased workpiece in a pickling tank with a hydrochloric acid concentration of 5-23% for rust removal. The pickling time is 5-12 minutes, and the workpiece is continuously raised and lowered during the pickling process. 5) Water washing: The first water wash has a pH < 3 to pre-clean the pickling solution and impurities on the surface of the workpiece. The second water wash has a pH > 3 to thoroughly rinse away any remaining impurities on the surface of the workpiece. Each water wash should be performed at least twice. 6) Fluxing: Prepare a flux with ammonium chloride (140-260g / L), zinc chloride (40-160g / L) and a pH of 4-5. Immerse the workpiece in the flux thoroughly, and lift it up and down at least twice. A uniform thickness flux film is formed on the surface of the workpiece. The fluxing temperature is 20-60 degrees Celsius. 7) Drying: The workpieces after plating are sorted and loaded, and arranged in a toothed stack. They are then driven into the drying kiln by the chain to dry. Step 2, hot-dip galvanizing and cooling: 1) Material sorting: The drying chain (16) rotates, moving the workpiece to the front of the zinc pot. The material sorting component moves laterally to sort 8-12 pieces to the pre-galvanizing platform. After the pre-galvanizing platform takes the material, the material sorting component process is repeated until the next set of galvanizing is ready. 2) Material Retrieval: The robotic arm has 8-12 corresponding robotic arms for material retrieval. After setting the corresponding material retrieval position, the galvanizing machine is started, and the robotic arm motor drives it to the pre-galvanizing platform to retrieve the material. 3) Galvanizing: After the robotic arm picks up the material, it moves 8-12 pull rods to the corresponding zinc alloy liquid station 1 material support frame. The V-groove of the material support frame corresponds to the pull rods one by one. After the robotic arm places the pull rods stably, it rises up and repeats the picking and placing process to station 2, and then picking and placing the material to station 3. The zinc liquid temperature is between 440-475°C. The surface zinc oxide is cleaned every 20 minutes. The zinc alloy composition is: zinc: 99.974-99.9842%, nickel: 0.005%-0.01%, aluminum: 0.01%-0.015%. Rare earth elements: 0.0008%-0.001%; 4) Blowing: The galvanizing robot moves to the corresponding station, retrieves material from the zinc pot, raises it to the designated height, and then moves it to the guide rail. After ensuring the workpiece contacts the rail, it is raised and the above process is repeated. The workpiece passes through 8-12 air rings along the guide rail. a. Two magnetic rollers are placed in front of the air ring to ensure that the workpiece does not shift or interfere with the air ring when it is close to the air ring. b. The first track roller after the air ring is a magnetic roller to ensure that the workpiece does not deviate after passing through the air ring and is smoothly driven to the next process by the roller; the air pressure of the air ring is 0.3-0.5Mpa, which is provided by an air compressor; the air blowing angle of the air ring is 60-80 degrees to ensure that the threaded area on the pull bar is thoroughly cleaned; the track roller is equipped with a sensor, which automatically turns off the air blowing after the workpiece passes through; 5) Cooling: After the workpiece is coated with molten zinc, when it reaches the end of the runway, the sensor is activated to automatically flip the workpiece to the water tank for cooling. The cooling water tank chain rotates, carrying the cooled galvanized workpiece out of the water tank to the receiving rack. 6) Inspection: Inspect the cleanliness of the zinc layer and threads of the galvanized pull strip at the receiving rack, and test the galvanization quality of the threads by tightening the corresponding nuts. 7) Packaging: Move the workpiece to the packaging rack to dry it, and then pack the workpiece.

2. The galvanizing device for a double-ended threaded screw according to claim 1, characterized in that, In step one, the drying temperature of the drying kiln is 30-50 degrees Celsius.

3. The galvanizing device for a double-ended threaded screw according to claim 2, characterized in that, In step two, the cooling water temperature is 20-40 degrees Celsius.

4. The galvanizing device for a double-ended threaded screw according to claim 1, characterized in that, The lifting unit (10) includes a hydraulic rod (20) installed at one end of the upper surface of the loading rack (4). The lower end of the hydraulic rod (20) is hinged to the loading rack (4), and the telescopic end of the hydraulic rod (20) is hinged to one end of the rebar sorting platform (7). The other end of the rebar sorting platform (7) is hinged to the loading rack (4). Baffle plates (21) are installed at both ends of the upper surface of the rebar sorting platform (7). A hydraulic rod (22) is installed on one side of the loading rack (4). A trapezoidal plate (23) is installed at the telescopic end of the hydraulic rod (22). The trapezoidal plate (23) is connected to the rebar sorting platform (4). The picking platform (7) is in a misaligned state. The U-shaped buffer groove (8) is installed on the side of the feeding rack (4) close to the trapezoidal plate (23). The U-shaped buffer groove (8) and the trapezoidal plate (23) are in a misaligned state. An F-shaped rod (24) is installed on one side of the feeding rack (4). A guide plate (25) is installed on one side of the F-shaped rod (24). There are two pairs of guide plates (25). There is a gap between the guide plates (25). The material bar body (1) falls onto the material bar circulation mechanism through the gap. A secondary moving plate (68) is installed at the lower end of the trapezoidal plate (23).

5. The galvanizing device for a double-ended threaded screw according to claim 4, characterized in that, The interference part (9) includes an F-shaped rod (26) installed at the telescopic end of the hydraulic rod (22), and a trapezoidal plate (27) is installed on the upper end of the F-shaped rod (26).

6. The galvanizing device for a double-ended threaded screw according to claim 5, characterized in that, The limiting part (14) includes circular through holes (28) on both sides of the U-shaped block (13), a sliding shaft (29) is installed in the circular through holes (28), a limiting groove (30) is opened on both sides of the circular through holes (28), a limiting block (31) is installed on both sides of the sliding shaft (29) and is slidably connected to the limiting groove (30), a compression spring (32) is installed between the limiting block (31) and the limiting groove (30), a slope (33) is provided at one end of the sliding shaft (29), an interference shaft (35) is installed on the side surface of the sliding shaft (29), the interference shaft (35) is located at one end of the slope (34), and the position of the interference shaft (35) corresponds to the position of the trapezoidal plate (2); a drive motor (36) is installed on each of the bracket (11), bracket (12) and the circulation frame (5), the rotating end of the drive motor (36) is fixedly connected to the sprocket (15), and the limiting part (14) corresponds to the position of the guide plate (25).

7. The galvanizing device for a double-ended threaded screw according to claim 6, characterized in that, The opening part (17) includes a hydraulic rod three (37) installed at the lower end of the circulation frame (5). The hydraulic rod three (37) extends downwards. A U-shaped rod (38) is installed at the extension end of the hydraulic rod three (37). A release plate (39) is installed at the upper end of the U-shaped rod (38). The position of the release plate (39) corresponds to that of the interference axis (35).

8. The galvanizing device for a double-ended threaded screw according to claim 7, characterized in that, The holding assembly includes a support block (40) installed on one side of the circulation rack (5). There are three support blocks (40) arranged in a row. The upper surface of the support block (40) has two grooves (41) at both ends. A sliding block (42) is installed at one end of the groove (41). An inclined plate (43) is installed on the upper surface of the sliding block (42). A compression spring (44) is installed between the sliding block (42) and the groove (41). The limiting part (14) is positioned corresponding to the support block (40). The combing assembly includes a moving block (45) installed at both ends of the slide rail (6). The moving block (45) is slidably connected to the slide rail (6). A rotary motor (46) is installed at one end of the slide rail (6). A threaded shaft (47) is installed at the rotating end of the rotary motor (46) and threadedly connected to the moving block (45). The two ends of the threaded shaft (47) are threaded. The upper surface of the moving block (45) is equipped with a hydraulic cylinder (48) in the opposite direction. The hydraulic cylinder (48) extends and retracts in the horizontal direction. The extension and retraction ends of the hydraulic cylinder (48) are equipped with a hydraulic cylinder (49) and a hydraulic cylinder (50). The hydraulic cylinder (22) and the hydraulic cylinder (50) extend and retract in the vertical direction. The extension and retraction ends of the hydraulic cylinder (49) are equipped with a pressure plate (51). The extension and retraction ends of the hydraulic cylinder (50) are equipped with a connecting plate (52). The lower surface of the connecting plate (52) is equipped with a separating comb (53). The separating comb (53) has a conical outline. The separating comb (53) is composed of multiple vertical plates (54). The vertical plates (54) are arranged in a straight line. The vertical plates (54) become shorter from the center position to the two sides. The lower end of the vertical plate (54) is equipped with a contact head (55). The contact head (55) is offset from the axis of the material bar body (1).

9. The galvanizing device for a double-ended threaded screw according to claim 8, characterized in that, The transfer assembly includes a vertical bearing (56) installed on one side of the support block (40), a drive shaft (57) installed on the inner ring of the vertical bearing (56), a swing plate (58) installed at one end of the drive shaft (57), the swing height of the swing plate (58) is higher than the height of the inclined plate (43), a strong magnet (59) is installed at one end of the swing plate (58), multiple strong magnets (59) are provided and correspond one-to-one with the material bar body (1), a gear one (60) is installed at the other end of the drive shaft (57), a stepper motor (61) is installed on one side of the support block (40), and a gear two (62) that meshes with the gear one (60) is installed on the rotating end of the stepper motor (61); the conveying mechanism (63) is located on one side of the support block (40), a transmission belt (64) is installed at the transmission end of the conveying mechanism (63), a V-groove (65) is provided on the outer surface of the transmission belt (64), and a baffle (66) is provided on one side of the V-groove (65).

10. A galvanizing device for a double-ended threaded screw according to any one of claims 1-9, characterized in that, A photoelectric switch (67) is installed on the circulation rack (5).

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