A spheroidizing annealing apparatus for fastener production

Abstract

The utility model relates to spheroidizing annealing technical field discloses a spheroidizing annealing equipment for fastener production, including preheating box, the outer wall left side intercommunication of preheating box has the connecting groove no. 1, the outer wall left side intercommunication of connecting groove no. 1 has the temperature rise box, the inner wall both sides fixed connection of temperature rise box has the heating wire, the outer wall left side intercommunication of temperature rise box has the connecting groove no. 2, the outer wall left side intercommunication of connecting groove no. 2 has the cooling box, the inner wall both sides of cooling box are equipped with the sliding slot, the outer wall sliding connection of sliding slot has the storage rack, the outer wall rear side intercommunication of cooling box has the conveying pipe no. 1. In the utility model, the sliding of the storage rack is realized through the sliding slot, the preheating is carried out in the inside of the preheating box first, then enters the temperature rise box through the connecting groove no. 1, the inner wall fixed connection of temperature rise box has the heating wire, the temperature rise is carried out through the heating wire, and the cooling is carried out through the connecting groove no. 2 after completing annealing and entering the cooling box.

Description

Technical Field

[0001] This utility model relates to the field of spheroidizing annealing technology, and in particular to a spheroidizing annealing equipment for fastener production. Background Technology

[0002] Bolts and nuts are widely used in mechanical connections and require good mechanical properties. Due to long-term exposure to hydrogen, oxygen, and chloride ions in the environment, ordinary tempered martensitic bolt steel is prone to delayed fracture, and the sensitivity to delayed fracture increases with strength. Therefore, improving the fastener's resistance to delayed fracture, as well as its cold heading and ductility, is a problem that needs to be solved. Spheroidizing annealing is an important process for improving material properties. Spheroidizing annealing is a heat treatment process in which metal is slowly heated to a certain temperature, held for a certain time, and then cooled at an appropriate rate. Its purpose is to eliminate residual stress and work hardening, improve plasticity, and transform lamellar carbides into spheroidal carbides that are evenly distributed on the ferrite matrix, thus preparing the microstructure for subsequent cold heading and other processing steps. At the same time, it improves the toughness of the material and reduces the hardness after annealing.

[0003] For long bolts or irregularly shaped nuts, uneven heating in different parts can lead to inconsistent spheroidization of carbides. Some areas may be over-spheroidized, while others may be under-spheroidized with residual flaky carbides. This ultimately results in excessive differences in hardness and cold heading performance among fasteners from the same batch. Furthermore, insufficient heat utilization remains a problem. Current market solutions include installing multiple sets of high-temperature circulating fans within the furnace, combined with guide plates to create a spiral airflow path. For stacked nuts, honeycomb-shaped loading trays can be designed to allow hot air to penetrate the stacking gaps and reach the thread surface. For long bolts suspended in the conveyor, guide nozzles are installed on both sides of the conveyor chain to create an airflow along the bolt's axis, ensuring uniform heating of the bolt. However, the problem of insufficient heat utilization remains unresolved, exacerbating temperature fluctuations within the furnace and affecting the annealing quality of bolts and nuts. Insufficient heat utilization is often accompanied by uneven heat distribution. Localized areas within the furnace experience sudden temperature drops due to insufficient heat replenishment, while other areas remain overheated, disrupting the stability of the temperature field. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a spheroidizing annealing device for fastener production, which aims to improve the problem of insufficient heat utilization in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spheroidizing annealing device for fastener production, comprising a preheating box, a connecting groove 1 connected to the left side of the outer wall of the preheating box, a heating box connected to the left side of the outer wall of the connecting groove 1, heating wires fixedly connected to both sides of the inner wall of the heating box, a connecting groove 2 connected to the left side of the outer wall of the heating box, a cooling box connected to the left side of the outer wall of the connecting groove 2, sliding grooves provided on both sides of the inner wall of the cooling box, a shelf slidably connected to the outer wall of the sliding groove, a conveying pipe 1 connected to the rear side of the outer wall of the cooling box, a fixing ring 1 fixedly connected to the inner wall of the conveying pipe 1, a motor 1 fixedly connected to the inner wall of the fixing ring 1, a rotating shaft 1 fixedly connected to the output end of the motor 1, a fan 1 fixedly connected to the top of the outer wall of the rotating shaft 1, and a cooling mechanism fixedly connected to the front side of the outer wall of the cooling box, the cooling mechanism being used to uniformly cool the object.

[0006] As a further description of the above technical solution:

[0007] The cooling mechanism includes a cooling tank, the rear side of which is fixedly connected to the front side of the outer wall of the cooling box. The top of the outer wall of the cooling tank is connected to a second conveying pipe, the bottom of the outer wall of the second conveying pipe is connected to a conveying frame, the lower side of the outer wall of the conveying frame is connected to a nozzle, the top of the outer wall of the cooling box is fixedly connected to a water-cooling plate, the inner wall of the water-cooling plate is fixedly connected to a refrigeration pump, both ends of the outer wall of the refrigeration pump are connected to circulation pipes, and the front side of the outer wall of the second conveying pipe is connected to a second valve.

[0008] As a further description of the above technical solution:

[0009] An exhaust pipe is connected to the front side of the outer wall of the cooling box, and an exhaust canister is connected to the rear side of the outer wall of the cooling box.

[0010] As a further description of the above technical solution:

[0011] A second fixing ring is fixedly connected to the front side of the inner wall of the exhaust pipe, and a first activated carbon is fixedly connected to the middle of the inner wall of the second fixing ring.

[0012] As a further description of the above technical solution:

[0013] A filter plate is fixedly connected to the top of the outer wall of the exhaust pipe, and a motor is fixedly connected to the middle of the inner wall of the exhaust pipe.

[0014] As a further description of the above technical solution:

[0015] The output end of the second motor is fixedly connected to the second rotating shaft, and the top of the outer wall of the second rotating shaft is fixedly connected to the second fan.

[0016] As a further description of the above technical solution:

[0017] A connecting pipe is fixedly connected to the top of the outer wall of the exhaust tank, and a valve is connected to the rear side of the outer wall of the connecting pipe.

[0018] As a further description of the above technical solution:

[0019] A heat insulation plate is fixedly connected to the bottom of the outer wall of the preheating box, a rotating rod is fixedly connected to the right side of the outer wall of the preheating box, and a sealing plate is rotatably connected to the lower side of the outer wall of the rotating rod.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the sliding of the shelf is achieved by a sliding groove. First, it is preheated inside the preheating box. Then, it enters the heating box through the first connecting groove. A heating wire is fixedly connected to the inner wall of the heating box. The heating wire is used to raise the temperature. After annealing, it enters the cooling box through the second connecting groove to lower the temperature. A conveying pipe is connected to the rear side of the outer wall of the cooling box. The heat in the cooling box is transferred to the preheating box through the conveying pipe to provide heat for preheating.

[0022] 2. In this utility model, the refrigerant gas in the cooling tank is transported through the second conveying pipe. A conveying frame is connected to the bottom of the outer wall of the second conveying pipe, and a nozzle is connected to the lower side of the outer wall of the conveying frame. The gas is evenly sprayed out through the nozzle via the conveying frame. A circulation pipe is connected to both ends of the outer wall of the refrigeration pump, and the outer wall of the first conveying pipe is cooled through the circulation pipe. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a spheroidizing annealing device for fastener production proposed in this utility model;

[0024] Figure 2 This is a partial structural diagram of a spheroidizing annealing device for fastener production proposed in this utility model;

[0025] Figure 3 This is a partial structural schematic diagram of a spheroidizing annealing equipment for fastener production proposed in this utility model;

[0026] Figure 4 This is a partially exploded view of a spheroidizing annealing device for fastener production proposed in this utility model;

[0027] Figure 5 This is a partially exploded schematic diagram of a spheroidizing annealing device for fastener production proposed in this utility model.

[0028] Legend:

[0029] 1. Preheating box; 2. Cooling mechanism; 201. Cooling tank; 202. Conveying pipe II; 203. Water-cooled plate; 204. Refrigeration pump; 205. Circulation pipe; 206. Conveying frame; 207. Nozzle; 208. Valve II; 3. Connecting groove I; 4. Heating box; 5. Connecting groove II; 6. Cooling box; 7. Conveying pipe I; 8. Slide chute; 9. Heating wire; 10. Shelf; 11. Rotating shaft I; 12. Fan I; 13. Motor I; 14. Fixing ring I; 15. Exhaust pipe; 16. Fixing ring II; 17. Activated carbon I; 18. Motor II; 19. Fan II; 20. Filter plate; 21. Exhaust tank; 22. Connecting pipe; 23. Valve I; 24. Heat insulation plate; 25. Rotating rod; 26. Sealing plate; 27. Rotating shaft II. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 2 - Appendix Figure 4 An embodiment of this utility model provides a spheroidizing annealing device for fastener production, comprising a preheating box 1, a connecting groove 3 connected to the left side of the outer wall of the preheating box 1, a heating box 4 connected to the left side of the outer wall of the connecting groove 3, heating wires 9 fixedly connected to both sides of the inner wall of the heating box 4, a connecting groove 5 connected to the left side of the outer wall of the heating box 4, a cooling box 6 connected to the left side of the outer wall of the connecting groove 5, sliding grooves 8 opened on both sides of the inner wall of the cooling box 6, a shelf 10 slidably connected to the outer wall of the sliding grooves 8, a conveying pipe 7 connected to the rear side of the outer wall of the cooling box 6, a fixing ring 14 fixedly connected to the inner wall of the conveying pipe 7, a motor 13 fixedly connected to the inner wall of the fixing ring 14, a rotating shaft 11 fixedly connected to the output end of the motor 13, a fan 12 fixedly connected to the top of the outer wall of the rotating shaft 11, and a cooling mechanism 2 fixedly connected to the front side of the outer wall of the cooling box 6, the cooling mechanism 2 being used to uniformly cool the object;

[0032] Specifically, the left side of the outer wall of the preheating box 1 is connected via connecting groove 3, and the left side of the outer wall of connecting groove 3 is further connected to the heating box 4. Inside the heating box 4, heating wires 9 are fixedly connected to both sides of its inner wall. These heating wires 9 are used to provide heating. The left side of the outer wall of the heating box 4 is further connected via connecting groove 2 5, and the left side of the outer wall of connecting groove 2 5 is connected to the cooling box 6. Inside the cooling box 6, sliding grooves 8 are provided on both sides of its inner wall. The outer walls of these sliding grooves 8 are fixedly connected to shelves 10 by sliding connection for placing fasteners to be processed. The rear side of the outer wall of the cooling box 6 is also connected to a conveying pipe 7. A fixing ring 14 is fixedly connected to the inner wall of the conveying pipe 7, and a motor 13 is fixedly connected to the inner wall of the fixing ring 14. The output end of the motor 13 is fixedly connected to a rotating shaft 11, and the top of the outer wall of the rotating shaft 11 is fixedly connected to a fan 12 for conveying heat for preheating.

[0033] Please see the appendix Figure 3 - Appendix Figure 5 The cooling mechanism 2 includes a cooling tank 201. The rear side of the outer wall of the cooling tank 201 is fixedly connected to the front side of the outer wall of the cooling box 6. The top of the outer wall of the cooling tank 201 is connected to a second conveying pipe 202. The bottom of the outer wall of the second conveying pipe 202 is connected to a conveying frame 206. The lower side of the outer wall of the conveying frame 206 is connected to a nozzle 207. The top of the outer wall of the cooling box 6 is fixedly connected to a water-cooling plate 203. The inner wall of the water-cooling plate 203 is fixedly connected to a refrigeration pump 204. The two ends of the outer wall of the refrigeration pump 204 are connected to circulation pipes 205. The front side of the outer wall of the second conveying pipe 202 is connected to a second valve 208.

[0034] Specifically, the cooling mechanism 2 includes a cooling tank 201. The rear side of the outer wall of the cooling tank 201 is fixedly connected to the front side of the outer wall of the cooling box 6. The top of the outer wall of the cooling tank 201 is provided with a second delivery pipe 202. The bottom of the outer wall of the second delivery pipe 202 is connected to the delivery frame 206 through a connecting structure. The lower side of the outer wall of the delivery frame 206 is further connected to the nozzle 207 to spray out cooling gas. In addition, a water-cooling plate 203 is fixedly connected to the top of the outer wall of the cooling box 6. A refrigeration pump 204 is fixedly connected to the inner wall of the water-cooling plate 203. The two ends of the outer wall of the refrigeration pump 204 are respectively connected to circulation pipes 205 to realize the circulation of coolant. In order to control the flow rate and direction of coolant, a second valve 208 is also connected to the front side of the outer wall of the second delivery pipe 202. The delivery state of coolant can be adjusted by the valve.

[0035] Please see the appendix Figure 3 - Appendix Figure 5The front side of the outer wall of the cooling box 6 is connected to an exhaust pipe 15, the rear side of the outer wall of the cooling box 6 is connected to an exhaust tank 21, the front side of the inner wall of the exhaust pipe 15 is fixedly connected to a fixing ring 16, the middle of the inner wall of the fixing ring 16 is fixedly connected to activated carbon 17, the top of the outer wall of the exhaust pipe 15 is fixedly connected to a filter plate 20, and the middle of the inner wall of the exhaust pipe 15 is fixedly connected to a motor 18.

[0036] Specifically, an exhaust pipe 15 is connected to the front of the outer wall of the cooling box 6 via a pre-set pipe. The main function of the exhaust pipe 15 is to discharge the waste gas generated inside the cooling box 6. At the same time, an exhaust canister 21 is also connected to the rear of the outer wall of the cooling box 6 via another pre-set pipe. The exhaust canister 21 is used to vent the gas in the equipment for the next use. A fixing ring 26 is fixedly connected to the front of the inner wall of the exhaust pipe 15 by bolts or other fixing devices. The main function of the fixing ring 26 is to provide support and fixation. In the middle, an activated carbon 17 is fixedly connected by adhesive or other fixing methods. The activated carbon 17 is used to adsorb harmful substances in the exhaust gas and purify the particulate matter in the exhaust gas. A filter plate 20 is fixedly connected to the top of the outer wall of the exhaust pipe 15 by welding or other fixing methods. The filter plate 20 further filters impurities in the exhaust gas to ensure the cleanliness of the exhaust gas. A motor 18 is fixedly connected to the middle of the inner wall of the exhaust pipe 15 by bolts or other fixing devices. The motor 18 is used to drive the airflow inside the exhaust pipe 15 to ensure that the exhaust gas can be discharged smoothly.

[0037] Please see the appendix Figure 1 - Appendix Figure 3 The output end of motor 218 is fixedly connected to rotating shaft 27. Fan 29 is fixedly connected to the top of the outer wall of rotating shaft 27. Connecting pipe 22 is fixedly connected to the top of the outer wall of exhaust tank 21. Valve 23 is connected to the rear side of the outer wall of connecting pipe 22. Heat insulation plate 24 is fixedly connected to the bottom of the outer wall of preheating box 1. Rotating rod 25 is fixedly connected to the right side of the outer wall of preheating box 1. Sealing plate 26 is rotatably connected to the lower side of the outer wall of rotating rod 25.

[0038] Specifically, the output end of motor 218 is fixedly connected to a rotating shaft 27 via a robust connecting device. The top of the outer wall of the rotating shaft 27 is securely connected to a high-efficiency fan 29 via a precise fixing structure to accelerate the gas flow. The top of the outer wall of the exhaust tank 21 is also reliably connected to a connecting pipe 22. The rear side of the outer wall of the connecting pipe 22 is connected to a valve 23 via a precise connection design to control and regulate the gas flow. The bottom of the outer wall of the preheating box 1 is fixedly connected to a heat insulation plate 24 via a stable fixing device. The heat insulation plate 24 can effectively insulate heat and prevent heat loss. In addition, the right side of the outer wall of the preheating box 1 is fixedly connected to a rotating rod 25 via a robust connecting structure. The lower side of the outer wall of the rotating rod 25 is rotatably connected to a sealing plate 26 via a flexible rotating connecting device to provide a sealing function.

[0039] Working principle: The object to be annealed is placed in the shelf 10. A sliding groove 8 is slidably connected to the bottom of the outer wall of the shelf 10, allowing it to slide. First, preheating occurs inside the preheating chamber 1. Then, it enters the heating chamber 4 through connecting groove 3. A heating wire 9 is fixedly connected to the inner wall of the heating chamber 4, providing heating. After annealing, it enters the cooling chamber 6 through connecting groove 2 5 for cooling. A conveying pipe 7 is connected to the rear side of the outer wall of the cooling chamber 6, allowing the material to be transported... The conveying pipe 7 transfers heat from the cooling box 6 to the preheating box 1 to provide heat for preheating. At the same time, a fixing ring 14 is fixedly connected to the inner wall of the conveying pipe 7, and a motor 13 is fixedly connected to the inner wall of the fixing ring 14. A rotating shaft 11 is fixedly connected to the output end of the motor 13, and a fan 12 is fixedly connected to the top of the outer wall of the rotating shaft 11. The motor 13 drives the rotating shaft 11, thereby driving the fan 12 to rotate. The rotation of the fan 12 accelerates the heat transfer.

[0040] A cooling tank 201 is fixedly connected to the outer wall of the first conveying pipe 7. The top of the outer wall of the cooling tank 201 is connected to a second conveying pipe 202. The refrigerant gas in the cooling tank 201 is conveyed through the second conveying pipe 202. A conveying frame 206 is connected to the bottom of the outer wall of the second conveying pipe 202. A nozzle 207 is connected to the lower side of the outer wall of the conveying frame 206. The nozzle 207 sprays the gas evenly through the conveying frame 206 to cool the object evenly and prevent damage to the object due to localized low temperature. At the same time, a water-cooling plate 203 is fixedly connected to the top of the outer wall of the first conveying pipe 7. A refrigeration pump 204 is fixedly connected to the inner wall of the water-cooling plate 203. Circulation pipes 205 are connected to both ends of the outer wall of the refrigeration pump 204. The outer wall of the first conveying pipe 7 is cooled through the circulation pipes 205, and the refrigeration pump 204 circulates and cools the circulation pipes 205.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spheroidizing annealing apparatus for fastener production, comprising a preheating chamber (1), characterized in that: The preheating box (1) has a connecting groove 1 (3) on the left side of its outer wall. The heating box (4) is connected to the left side of the outer wall of the connecting groove 1 (3). Heating wires (9) are fixedly connected to both sides of the inner wall of the heating box (4). The heating box (4) has a connecting groove 2 (5) on the left side of its outer wall. The cooling box (6) has a sliding groove (8) on both sides of its inner wall. A shelf (10) is slidably connected to the outer wall of the sliding groove (8). The outer wall of the cooling box (6) is connected to a conveying pipe (7), and a fixing ring (14) is fixedly connected to the inner wall of the conveying pipe (7). A motor (13) is fixedly connected to the inner wall of the fixing ring (14). A rotating shaft (11) is fixedly connected to the output end of the motor (13). A fan (12) is fixedly connected to the top of the outer wall of the rotating shaft (11). A cooling mechanism (2) is fixedly connected to the front side of the outer wall of the cooling box (6). The cooling mechanism (2) is used to uniformly cool the object.

2. The spheroidizing annealing equipment for fastener production according to claim 1, characterized in that: The cooling mechanism (2) includes a cooling tank (201), the rear side of the outer wall of the cooling tank (201) is fixedly connected to the front side of the outer wall of the cooling box (6), the top of the outer wall of the cooling tank (201) is connected to a second conveying pipe (202), the bottom of the outer wall of the second conveying pipe (202) is connected to a conveying frame (206), the lower side of the outer wall of the conveying frame (206) is connected to a nozzle (207), the top of the outer wall of the cooling box (6) is fixedly connected to a water cooling plate (203), the inner wall of the water cooling plate (203) is fixedly connected to a refrigeration pump (204), the two ends of the outer wall of the refrigeration pump (204) are connected to a circulation pipe (205), and the front side of the outer wall of the second conveying pipe (202) is connected to a second valve (208).

3. The spheroidizing annealing equipment for fastener production according to claim 1, characterized in that: The cooling box (6) has an exhaust pipe (15) connected to the front side of its outer wall and an exhaust canister (21) connected to the rear side of its outer wall.

4. The spheroidizing annealing equipment for fastener production according to claim 3, characterized in that: A fixing ring two (16) is fixedly connected to the front side of the inner wall of the exhaust pipe (15), and an activated carbon one (17) is fixedly connected to the middle of the inner wall of the fixing ring two (16).

5. The spheroidizing annealing equipment for fastener production according to claim 3, characterized in that: A filter plate (20) is fixedly connected to the top of the outer wall of the exhaust pipe (15), and a motor (18) is fixedly connected to the middle of the inner wall of the exhaust pipe (15).

6. The spheroidizing annealing equipment for fastener production according to claim 5, characterized in that: The output end of the second motor (18) is fixedly connected to the second rotating shaft (27), and the top of the outer wall of the second rotating shaft (27) is fixedly connected to the second fan (19).

7. The spheroidizing annealing equipment for fastener production according to claim 3, characterized in that: A connecting pipe (22) is fixedly connected to the top of the outer wall of the exhaust tank (21), and a valve (23) is connected to the rear side of the outer wall of the connecting pipe (22).

8. The spheroidizing annealing equipment for fastener production according to claim 1, characterized in that: A heat insulation plate (24) is fixedly connected to the bottom of the outer wall of the preheating box (1), a rotating rod (25) is fixedly connected to the right side of the outer wall of the preheating box (1), and a sealing plate (26) is rotatably connected to the lower side of the outer wall of the rotating rod (25).

Images