Automatic feeding annealing furnace for heat treatment of cold drawn steel

Abstract

The utility model relates to the technical field of cold drawn steel processing, in particular to an automatic feeding annealing furnace for heat treatment of cold drawn steel, which comprises an annealing furnace, sealing gates are respectively arranged on two sides of the annealing furnace, a conveying mechanism is arranged in the annealing furnace, and meshing teeth are driven by a synchronous belt to move together. The meshed driven wheels drive the conveying rollers to rotate synchronously in the same direction so as to play a role in automatically conveying materials, the meshing teeth arranged outside the synchronous belt are meshed with the driven wheels for driving, the degree of freedom of fluctuating changes of the conveying rollers in the laying process can be greatly improved, and the conveying efficiency is improved. The trapezoid can serve as the shape adopted in the scheme, the slopes on the two sides can effectively reduce the material loading and unloading height, the material loading, unloading and transferring difficulty is greatly reduced, and the purpose of continuous and automatic feeding can be achieved by placing materials on the conveying rollers.

Description

Technical Field

[0001] This utility model relates to the field of cold-drawn steel processing technology, specifically to an annealing furnace for heat treatment of cold-drawn steel with automatic feeding. Background Technology

[0002] Cold-drawn steel is a type of steel produced through cold drawing. During the cold drawing process, work hardening and residual stress are generated within the steel, affecting its properties such as toughness and ductility. To eliminate these adverse effects and restore and improve the steel's properties, heat treatment is necessary. Annealing is a crucial step in the heat treatment of cold-drawn steel. After the cold-drawn steel reaches the annealing temperature, it needs to be held at that temperature for a certain period to allow for a complete transformation of the steel's internal microstructure. During this process, atoms gain sufficient energy to diffuse and rearrange, eliminating the work hardening and residual stress generated during cold drawing, resulting in more uniform and finer grains, thereby improving its plasticity, toughness, and processing performance. However, in actual working conditions, the surface temperature of the steel is very high, making it difficult to transport it to a specific location for cooling and processing after it has been removed from the annealing furnace.

[0003] Existing technology, such as publication number CN221254614U, provides a processing equipment for stress relief of cold-drawn steel through heat treatment, relating to the field of cold-drawn steel stress relief processing technology. It includes an annealing furnace and a connecting plate, with the connecting plate fixedly installed on the side wall of the annealing furnace. This equipment, when a servo motor is activated, drives a rotating shaft to rotate. Since the rotating shaft and the connecting block are connected by a lead screw, the connecting block engages with the slot of the telescopic rod and the locking block at the top of the annealing frame. Then, the rotating shaft rotates in the opposite direction, causing the annealing frame to slide on the surface of the connecting plate until it disengages from the connecting plate. The telescopic rod is then driven downwards to place the annealing frame on the ground. The locking between the annealing frame and the telescopic rod is then released, and the annealing frame is removed for cooling. This completes the unloading of the steel and the annealing frame. The steel is then loaded onto the annealing frame for annealing, and the annealing frame moves between the annealing furnace and the connecting plate for unloading, avoiding direct contact with the annealed steel and facilitating movement.

[0004] The current design uses a lead screw to automatically load and unload materials onto the annealing rack. However, in large-scale processing, the annealing rack needs to reciprocate once on the chute each time materials are loaded or unloaded, making the lead screw reciprocating drive inefficient for continuous batch processing. Therefore, we propose an annealing furnace with automatic feeding for the heat treatment of cold-drawn steel. Utility Model Content

[0005] The purpose of this utility model is to provide an annealing furnace for heat treatment of cold-drawn steel with automatic feeding, which solves the problem of relatively low loading and unloading efficiency when cold-drawn steel is processed in batches and continuously.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An annealing furnace for heat treatment of cold-drawn steel with automatic feeding includes an annealing furnace, with sealing gates on both sides of the annealing furnace and a conveying mechanism inside the annealing furnace;

[0008] The conveying mechanism includes two sets of support frames, which are respectively arranged on both sides inside the annealing furnace, and the two ends of the support frames extend to the outside of the annealing furnace. Multiple sets of conveying rollers for conveying materials are arranged between the two sets of support frames. A servo motor for driving the conveying rollers is fixedly connected to the outer wall of the support frame at the position outside the annealing furnace.

[0009] Preferably, the support frame is trapezoidal in shape, and the raised area of ​​the trapezoid is located inside the annealing furnace.

[0010] Preferably, the support frame has four synchronous pulleys rotatably connected inside, and the four synchronous pulleys are arranged in a trapezoidal shape inside the support frame. The four synchronous pulleys are connected by a synchronous belt drive, and the output shaft of the servo motor is fixedly connected to one of the synchronous pulleys.

[0011] Preferably, a driven wheel is provided inside the support frame corresponding to the position of each conveying roller, and the driven wheel meshes with the meshing teeth arranged on the outer wall of the synchronous belt.

[0012] Preferably, the sealing gate includes a support frame, the inner wall of which is provided with a groove, and a sealing plate is slidably connected to the inner wall of the groove.

[0013] Preferably, electric cylinders for driving the sealing plate to rise and fall are fixedly connected to both sides of the top of the inner wall of the chute.

[0014] Preferably, the sealing plate has notches on both sides of its bottom to offset the support frame when the sealing plate is closed.

[0015] By employing the above technical solution, this utility model provides an annealing furnace for heat treatment of cold-drawn steel with automatic feeding. It possesses at least the following beneficial effects:

[0016] I. This utility model uses a synchronous belt to drive the meshing teeth to move together, so that the meshing driven wheel drives each conveyor roller to rotate synchronously and in the same direction, thereby achieving the function of automatic material conveying. By setting the meshing teeth outside the synchronous belt to mesh with the driven wheel for driving, the degree of freedom of the conveyor rollers in terms of height variation can be greatly improved. The trapezoidal shape can be used as the shape in this solution. The slopes on both sides can effectively reduce the height of material loading and unloading, greatly reducing the difficulty of material loading, unloading and transfer. By placing the material on the conveyor rollers, the purpose of continuous automatic feeding can be achieved.

[0017] II. In this utility model, the steel needs to be held at a certain temperature for a certain period of time during the annealing process in the annealing furnace to allow the internal structure of the steel to fully transform. During this process, the atoms gain enough energy to diffuse and rearrange, eliminating the work hardening and residual stress generated during cold drawing, making the steel grains more uniform and fine, thereby improving its plasticity, toughness and processing performance. By setting a sealing gate, when the conveying mechanism delivers the material to the designated position of the annealing furnace, the sealing plate is closed by an electric cylinder to seal the annealing furnace, so as to avoid a large amount of heat loss during the heat preservation of the annealing furnace and reduce energy consumption. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the conveying mechanism in this utility model;

[0021] Figure 3 In this utility model Figure 2 Enlarged view of point A;

[0022] Figure 4 This is a schematic diagram of the sealing gate in this utility model.

[0023] In the diagram: 1. Annealing furnace; 2. Sealing gate; 21. Support frame; 22. Slide groove; 23. Sealing plate; 24. Electric cylinder; 25. Notch; 3. Conveying mechanism; 31. Support frame; 32. Conveying roller; 321. Driven wheel; 33. Servo motor; 311. Synchronous belt; 312. Synchronous pulley; 333. Meshing teeth. Detailed Implementation

[0024] 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.

[0025] An annealing furnace for heat treatment of cold-drawn steel with automatic feeding, such as Figure 1 - Figure 4As shown, the annealing furnace includes an annealing furnace 1, with sealing gates 2 on both sides. A conveying mechanism 3 is installed inside the annealing furnace 1. The conveying mechanism 3 includes two sets of support frames 31, which are respectively located on both sides inside the annealing furnace 1, with both ends extending to the outside of the annealing furnace 1. Multiple sets of conveying rollers 32 for conveying materials are arranged between the two sets of support frames 31. A servo motor 33 for driving the conveying rollers 32 is fixedly connected to the outer wall of the support frame 31 at a position outside the annealing furnace 1. The support frame 31 has four synchronous pulleys 312 internally connected to it, and the four synchronous pulleys 312 are arranged in a trapezoidal shape inside the support frame 31. The four synchronous pulleys 312 are connected by a synchronous belt 311. The output shaft of the servo motor 33 is fixedly connected to one of the synchronous pulleys 312. A driven pulley 321 is provided inside the support frame 31 corresponding to the position of each conveying roller 32. The driven pulley 321 meshes with the meshing teeth 333 arranged on the outer wall of the synchronous belt 311. The support frame 31 is trapezoidal in shape, and the raised area of ​​the trapezoid is located inside the annealing furnace 1.

[0026] In this embodiment, by placing the material on the conveying roller 32, the servo motor 33 is started to drive one of the synchronous pulleys 312. Through the connection between the synchronous pulley 312 and the synchronous belt 311, the meshing teeth 333 on the outer wall of the synchronous belt 311 move together. Thus, the meshing driven wheel 321 drives each conveying roller 32 to rotate synchronously and in the same direction, thereby achieving the function of automatically conveying materials. Furthermore, by using an external servo motor 33 as the driving power, the influence of high temperature on the servo motor 33 during the conveying process can also be avoided. By setting the meshing teeth 333 on the outside of the synchronous belt 311 to mesh with the driven wheel 321 for driving, the degree of freedom of the conveying roller 32 in terms of height variation can be greatly improved. The trapezoidal shape can be used as the shape adopted in this solution. The slopes on both sides can effectively reduce the height of material loading and unloading, greatly reducing the difficulty of material loading, unloading and transfer. By placing the material on the conveying roller 32, the purpose of continuous automatic feeding can be achieved.

[0027] like Figure 1 , Figure 4 As shown, preferably, the sealing gate 2 includes a support frame 21, the inner wall of the support frame 21 is provided with a groove 22, the inner wall of the groove 22 is slidably connected with a sealing plate 23, the top two sides of the inner wall of the groove 22 are fixedly connected with electric cylinders 24 for driving the sealing plate 23 to rise and fall, and the bottom two sides of the sealing plate 23 are provided with notches 25 for offsetting the support frame 31 when the sealing plate 23 is closed.

[0028] In this embodiment, since the steel needs to be held at the temperature for a certain period of time during the annealing process in the annealing furnace 1, the internal structure of the steel is fully transformed. During this process, the atoms gain enough energy to diffuse and rearrange, eliminating the work hardening and residual stress generated during the cold drawing process, making the steel grains more uniform and fine, thereby improving its plasticity, toughness and processing performance. By setting a sealing gate 2, when the material is delivered to the designated position of the annealing furnace 1 by the conveying mechanism 3, the sealing plate 23 is closed by the electric cylinder 24 to seal the annealing furnace 1, so as to avoid a large amount of heat loss during the heat preservation of the annealing furnace 1 and reduce energy consumption.

[0029] In use, the automatic feeding annealing furnace for cold-drawn steel heat treatment of this utility model involves placing the material on the conveying roller 32, starting the servo motor 33 to drive one of the synchronous pulleys 312, and through the connection between the synchronous pulley 312 and the synchronous belt 311, the meshing teeth 333 on the outer wall of the synchronous belt 311 move together, thereby driving each conveying roller 32 to rotate synchronously and in the same direction through the meshing driven pulley 321, so as to achieve the function of automatic material conveying. By setting a sealing gate 2, when the conveying mechanism 3 delivers the material to the designated position of the annealing furnace 1, the sealing plate 23 is driven by the electric cylinder 24 to close, thereby sealing the annealing furnace 1, so as to avoid a large amount of heat loss during the heat preservation of the annealing furnace 1 and reduce energy consumption.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding, comprising an annealing furnace (1), characterized in that: The annealing furnace (1) is provided with sealing gates (2) on both sides, and a conveying mechanism (3) is provided inside the annealing furnace (1). The conveying mechanism (3) includes two sets of support frames (31). The two sets of support frames (31) are respectively arranged on both sides inside the annealing furnace (1), and the two ends of the support frames (31) extend to the outside of the annealing furnace (1). Multiple sets of conveying rollers (32) for conveying materials are arranged between the two sets of support frames (31). A servo motor (33) for driving the conveying rollers (32) is fixedly connected to the outer wall of the support frame (31) at the position outside the annealing furnace (1).

2. The annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 1, characterized in that: The support frame (31) is trapezoidal in shape, and the raised area of ​​the trapezoid is located inside the annealing furnace (1).

3. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 1, characterized in that: The support frame (31) is internally connected to four synchronous pulleys (312), and the four synchronous pulleys (312) are arranged in a trapezoidal shape inside the support frame (31). The four synchronous pulleys (312) are connected by a synchronous belt (311). The output shaft of the servo motor (33) is fixedly connected to one of the synchronous pulleys (312).

4. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 3, characterized in that: Inside the support frame (31), a driven wheel (321) is provided at the position corresponding to each conveying roller (32), and the driven wheel (321) meshes with the meshing teeth (333) arranged on the outer wall of the synchronous belt (311).

5. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 1, characterized in that: The sealing gate (2) includes a support frame (21), and a groove (22) is provided on the inner wall of the support frame (21). A sealing plate (23) is slidably connected to the inner wall of the groove (22).

6. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 5, characterized in that: Electric cylinders (24) for driving the sealing plate (23) to rise and fall are fixedly connected to the top two sides of the inner wall of the slide (22).

7. An annealing furnace for heat treatment of cold-drawn steel with automatic feeding according to claim 6, characterized in that: The sealing plate (23) has notches (25) on both sides of its bottom, which are used to offset the support frame (31) when the sealing plate (23) is closed.

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