An annealing furnace for high-strength bolt processing

Abstract

This disclosure relates to the technical field of bolt processing. One embodiment of this disclosure provides an annealing furnace for high-strength bolt processing, comprising: an equipment frame and a shell. The shell is fixed to the surface of the equipment frame. A box body is slidably connected to the equipment frame. The box body and the shell are connected by a linear drive. A heating component is disposed in the shell. A bottom box is fixed to the bottom of the equipment frame. A heat insulation and heat dissipation component is disposed in the equipment frame and the bottom box. A lowering port is respectively opened on the bottom surface of the box body and the surface of the equipment frame. A through cavity is opened inside the equipment frame, and the through cavity is connected to the lowering port. A sealing plate is slidably fitted inside the through cavity. A base frame is provided at the bottom of the equipment frame, and the sealing plate is connected to the base frame by a linear drive. The above technical solution solves the technical problem that existing annealing processes often require the three key steps of heating, heat preservation, and cooling to be completed in different equipment, resulting in a large number of equipment, high cost, and low efficiency.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of bolt processing, and more specifically, to an annealing furnace for processing high-strength bolts. Background Technology

[0002] Annealing is a crucial step in the manufacturing process of high-strength bolts. Annealing eliminates internal stresses generated during early processing such as forging and cold heading, improves the metallographic structure, and enhances the toughness and overall mechanical properties of the material, thereby ensuring the reliable quality and stability of high-strength bolts in subsequent use.

[0003] However, current traditional high-strength bolt annealing equipment has significant drawbacks. Existing annealing processes often require separating the three key steps of heating, holding, and cooling into different equipment. For example, the heating process may take place in a box-type resistance furnace or other types of heating equipment. After reaching the predetermined temperature, the bolts need to be transferred to a dedicated holding device for heat preservation, and then transferred to a cooling device for cooling. This decentralized processing method results in a large number of devices, increasing the equipment purchase costs for manufacturers and occupying a significant amount of production space, making the factory layout more complex. Simultaneously, the operation of multiple devices consumes more energy, such as electricity and fuel, further increasing production costs. Moreover, heat loss during material transfer can easily occur, affecting the holding effect and heating efficiency, leading to prolonged processing time and low production efficiency. Furthermore, frequent transfer operations may damage the bolt surface, increasing the product defect rate.

[0004] Therefore, there is an urgent need for an annealing furnace that can integrate heating, heat preservation, and cooling into one process. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide an annealing furnace for high-strength bolt processing, which solves the technical problem that the existing annealing process often requires the three key steps of heating, heat preservation and cooling to be completed in different equipment, resulting in a large number of equipment, high cost and low efficiency.

[0006] According to one aspect, at least one embodiment of the present disclosure provides an annealing furnace for processing high-strength bolts, comprising:

[0007] The equipment rack and the housing, wherein the housing is fixed to the surface of the equipment rack;

[0008] The enclosure and heating assembly are provided, wherein the enclosure is slidably connected to the equipment frame, and the enclosure and the outer shell are connected by a linear drive, and the heating assembly is disposed in the outer shell;

[0009] The equipment includes a base box and a heat insulation and heat dissipation assembly. The base box is fixed to the bottom of the equipment frame, and the heat insulation and heat dissipation assembly is disposed in the equipment frame and the base box.

[0010] The heat insulation and heat dissipation component includes a lowering port, which is respectively opened on the bottom surface of the box and the surface of the equipment frame. The equipment frame has a through cavity inside, which is connected to the lowering port. A sealing plate is slidably fitted inside the through cavity. A base frame is provided at the bottom of the equipment frame, and the sealing plate is connected to the base frame by a linear drive.

[0011] As a further technical solution, an outer cover is provided on the side surface of the bottom box, the outer cover is connected to the inside of the bottom box, a cooling fan is installed inside the outer cover, and a closed plate that is driven by electricity to rotate is provided on the side surface of the bottom box.

[0012] As a further technical solution, a pair of side frames are provided on the side surface of the bottom box, and a movable baffle is laterally and movably connected between the side frames. The surface of the movable baffle and the side surface of the bottom box are provided with a number of exhaust holes, and the movable baffle is connected by a linear drive.

[0013] As a further technical solution, a discharge pipe is provided on one side of the bottom box, and a pusher auger driven by electricity is installed in the bottom box and the discharge pipe.

[0014] As a further technical solution, the heating assembly includes a top frame, which is fixed to the top of the housing. A pair of telescopic rods are provided at the bottom of the top frame, with the lower ends of the telescopic rods passing through the surface of the housing and located inside. A heater is connected to the lower ends of the telescopic rods.

[0015] As a further technical solution, a heat-conducting plate is provided on the surface of the heater, and the heater and the top frame are connected by a vertical linear drive.

[0016] As a further technical solution, one side surface of the bottom box is an inclined structural surface, and the bottom of the bottom box is a semi-circular structure that matches the diameter of the pushing auger.

[0017] As a further technical solution, the surface of the central part of the equipment rack is a raised structure, and the surface of the raised part of the equipment rack slides and fits against the bottom surface of the box.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] In this disclosure, the heating assembly achieves efficient and uniform heating of bolts through an adjustable heater and heat-conducting plate, solving the problem of low heating efficiency in traditional equipment. The telescopic rod and vertical linear drive allow for flexible adjustment of the distance between the heater and the housing, adapting to the heating needs of bolts of different sizes. The heat-conducting plate increases the heat transfer area, ensuring uniform heating of the bolts. The heating process takes place within a closed shell, reducing heat loss and improving energy utilization. This design integrates the heating process into the equipment, eliminating the need to transfer bolts to dedicated heating equipment, shortening process time, laying the foundation for subsequent integrated heat preservation and cooling processes, and reducing equipment purchase costs and energy consumption. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is an isometric drawing of the present disclosure;

[0023] Figure 3 This is an isometric sectional view of the present disclosure;

[0024] In the diagram: 1. Equipment frame; 2. Outer shell; 3. Box; 4. Base box; 5. Insulation and heat dissipation components; 5-1. Lower opening; 5-2. Through cavity; 5-3. Sealing plate; 5-4. Base frame; 5-5. Outer cover; 5-6. Cooling fan; 5-7. Sealing plate; 5-8. Side frame; 5-9. Movable baffle; 5-10. Exhaust port; 5-11. Discharge pipe; 5-12. Pushing auger; 6. Heating components; 6-1. Top frame; 6-2. Telescopic rod; 6-3. Heater; 6-4. Heat conduction plate. Detailed Implementation

[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-3 As shown, it illustrates an annealing furnace for processing high-strength bolts according to an embodiment of the present disclosure, comprising:

[0032] The equipment frame 1 and the outer casing 2 are fixed to the surface of the equipment frame 1;

[0033] The housing 3 and the heating component 6 are slidably connected to the equipment frame 1. The housing 3 and the outer shell 2 are connected by a linear drive. The heating component 6 is disposed in the outer shell 2.

[0034] The base box 4 and the heat insulation and heat dissipation component 5 are provided. The base box 4 is fixed to the bottom of the equipment frame 1, and the heat insulation and heat dissipation component 5 is disposed in the equipment frame 1 and the base box 4.

[0035] The heat insulation and heat dissipation component 5 includes a lower opening 5-1, which is respectively opened on the bottom surface of the housing 3 and the surface of the equipment rack 1. A through cavity 5-2 is opened inside the equipment rack 1, and the through cavity 5-2 is connected to the lower opening 5-1. A sealing plate 5-3 is slidably fitted inside the through cavity 5-2. A base frame 5-4 is provided at the bottom of the equipment rack 1, and the sealing plate 5-3 is linearly driven and connected to the base frame 5-4. An outer cover 5-5 is provided on the side surface of the base housing 4, and the outer cover 5-5 is connected to the interior of the base housing 4. The bottom box 4 is equipped with a cooling fan 5-6. A closed plate 5-7 that is driven by electricity is provided on the side surface of the bottom box 4. A pair of side frames 5-8 are provided on the side surface of the bottom box 4. A movable baffle 5-9 is horizontally and movably connected between the side frames 5-8. Several exhaust holes 5-10 are opened on the surface of the movable baffle 5-9 and the side surface of the bottom box 4. The movable baffle 5-9 is connected by a linear drive. A discharge pipe 5-11 is provided on one side of the bottom box 4. A push auger 5-12 that is driven by electricity is installed in the bottom box 4 and the discharge pipe 5-11.

[0036] In some examples, in order to achieve the effects of heat preservation and cooling treatment as well as rapid material discharge, a heat preservation and heat dissipation component 5 is designed. This component includes a lower opening 5-1 opened on the bottom surface of the box 3 and the surface of the equipment frame 1, which can be aligned vertically to form a channel for bolts to move from the heating area to the cooling and heat preservation area. The cavity 5-2 is connected to the lower opening 5-1. The sealing plate 5-3 in the cavity 5-2 is connected to the linear drive device (such as a cylinder or electric push rod) on the base frame 5-4, which can precisely control the movement of the sealing plate 5-3 in and out of the cavity 5-2 to realize the opening and closing of the lower opening 5-1.

[0037] The outer cover 5-5 on the side surface of the base box 4 has a hollow structure, and a cooling fan 5-6 is installed inside to blow air inward. The sealing plate 5-7 on the side surface of the base box 4 is rotatably connected to the base box 4 through a rotating shaft. It is driven by a motor to achieve 0-180° rotation, which can open and close the outer cover 5-5 and maintain the internal temperature of the base box 4. A pair of side frames 5-8 are fixed parallel to the side surface of the base box 4. The movable baffle 5-9, which is laterally slidably connected between them, can move left and right. The exhaust holes 5-10 evenly distributed on the surface correspond one-to-one with the exhaust holes 5-10 on the side surface of the base box 4. The movable baffle 5-9 is controlled to move laterally through a linear drive device (such as a cylinder) to open and close the exhaust holes 5-10.

[0038] A pusher auger 5-12 is installed at the connection between the bottom box 4 and the discharge pipe 5-11. Its spiral blades are precisely fitted with the inner wall of the pipe. The drive motor is fixed to the outside of the bottom box 4 and connected to the auger shaft via a coupling. After the bolts have completed annealing and heating, the box 3 moves backward via a linear drive. After the lower opening 5-1 aligns, the sealing plate 5-3 opens, and the bolts fall into the through cavity 5-2 under gravity and enter the bottom box 4. At this time, the cooling fan 5-6 starts, blowing cooling air into the bottom box 4 through the outer cover 5-5. The movable baffle 5-9 opens the exhaust port 5-10 to control the cooling rate. The sealing plate 5-7 can rotate to a closed state during the heat preservation stage to reduce heat loss. The pusher auger 5-12 starts after the bolts have cooled to the specified temperature, conveying the bolts in the bottom box 4 along the discharge pipe 5-11 to the next process.

[0039] The overall structure enables temperature gradient control of bolts after annealing, which not only meets the requirements for heat preservation and aging, but also adjusts the cooling rate according to the production rhythm, thereby improving the consistency of annealing and production efficiency.

[0040] like Figures 1-3 As shown in the figure, the heating assembly 6 in this embodiment includes a top frame 6-1, which is fixed to the top of the outer shell 2. A pair of telescopic rods 6-2 are provided at the bottom of the top frame 6-1. The lower ends of the telescopic rods 6-2 pass through the surface of the outer shell 2 and are located inside. A heater 6-3 is connected to the lower end of the telescopic rods 6-2. A heat-conducting plate 6-4 is provided on the surface of the heater 6-3. The heater 6-3 and the top frame 6-1 are connected by a vertical linear drive.

[0041] In some examples, a heating assembly 6 is designed to achieve rapid heating of the bolts. This assembly includes a top frame 6-1 fixed to the top of the housing 2, and a telescopic rod 6-2 at the bottom, which passes through the housing 2 and connects to the heater 6-3, ensuring the heater 6-3 is stable and can move flexibly. A vertical linear drive between the heater 6-3 and the top frame 6-1 allows adjustment of the distance between the heater 6-3 and the bolts inside the housing 3. A temperature sensor inside the housing 2 is electrically connected to the heater 6-3, forming a closed-loop control system that adjusts the heating temperature in real time, ensuring uniform heating of the bolts and meeting process requirements, thus satisfying the heat treatment needs of high-strength bolts.

[0042] For example, such as Figure 1 As shown, one side surface of the bottom box 4 is an inclined structural surface, and the bottom of the bottom box 4 is a semi-circular structure that matches the diameter of the push auger 5-12.

[0043] In some examples, the inclined structural surface on one side of the base box 4, along with the semi-circular bottom design, fits closely with the pusher auger 5-12. The inclined surface extends from the side to the bottom, guiding the bolts to slide down towards the semi-circular bottom under gravity. The curvature of the semi-circular bottom matches the diameter of the pusher auger 5-12, ensuring the bolts fall precisely between the auger blades. This structure ensures the bolts smoothly converge in the auger's working area, preventing accumulation, improving the conveying efficiency of the pusher auger 5-12, and reducing bolt residue within the base box 4, facilitating subsequent cleaning and maintenance.

[0044] For example, such as Figure 1 As shown, the central part of the equipment rack 1 has a raised structure, and the raised part of the equipment rack 1 slides and fits against the bottom surface of the box 3.

[0045] In some examples, the centrally located protrusion of the equipment rack 1 provides stable support for the sliding of the housing 3. The surface of the protrusion is finely polished and fits snugly against the bottom surface of the housing 3. The protrusion enhances the contact stability between the housing 3 and the equipment rack 1, reducing shaking during the process of the housing 3 moving in and out of the heating area of ​​the outer shell 2, ensuring the precise relative position of the heating component 6 and the bolts inside the housing 3, and improving the stability and consistency of the bolt heating process.

[0046] In practical use: High-strength bolts are placed inside housing 3. A linear drive moves housing 3 into the outer shell 2. A vertical linear drive on top frame 6-1 extends telescopic rod 6-2, bringing heater 6-3 and heat-conducting plate 6-4 close to housing 3. Heater 6-3 is then activated to heat the bolts. After heating, the linear drive moves housing 3 out of outer shell 2. The linear drive on bottom frame 5-4 pulls sealing plate 5-3, connecting cavity 5-2 with lower opening 5-1. The bolts fall into bottom housing 4 through lower opening 5-1 and cavity 5-2. Sealing plate 5-3 is closed, and sealing plate 5-7 is rotated to seal bottom housing 4. Movable baffle 5-9 closes exhaust port 5-10 for heat preservation. After heat preservation, sealing plate 5-7 and movable baffle 5-9 are opened. Cooling fan 5-6 inside outer cover 5-5 starts to cool the bolts. Movable baffle 5-9 is adjusted to control the opening and closing of exhaust port 5-10 to adjust the cooling rate. After cooling is complete, the push auger 5-12 is started to transport the bolts along the discharge pipe 5-11 to the next process. The raised structure of the equipment frame 1 ensures that the box 3 slides smoothly. The inclined surface of the bottom box 4 and the semi-circular bottom cooperate with the push auger 5-12 to reduce bolt residue.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An annealing furnace for processing high-strength bolts, characterized in that, include: Equipment frame (1) and housing (2), wherein the housing (2) is fixed to the surface of the equipment frame (1); The housing (3) and the heating assembly (6) are slidably connected to the equipment rack (1), and the housing (3) and the outer shell (2) are connected by a linear drive. The heating assembly (6) is disposed in the outer shell (2). The base box (4) and the heat insulation and heat dissipation component (5) are provided. The base box (4) is fixed to the bottom of the equipment frame (1), and the heat insulation and heat dissipation component (5) is provided in the equipment frame (1) and the base box (4). The heat insulation and heat dissipation component (5) includes a lower opening (5-1), which is respectively opened on the bottom surface of the box (3) and the surface of the equipment rack (1). The equipment rack (1) has a through cavity (5-2) inside, which is connected to the lower opening (5-1). A sealing plate (5-3) is slidably connected inside the through cavity (5-2). A base frame (5-4) is provided at the bottom of the equipment rack (1). The sealing plate (5-3) is connected to the base frame (5-4) by a linear drive.

2. The annealing furnace for high-strength bolt processing according to claim 1, characterized by The bottom box (4) is provided with an outer cover (5-5) on its side surface. The outer cover (5-5) is connected to the inside of the bottom box (4). A cooling fan (5-6) is installed inside the outer cover (5-5). The bottom box (4) is provided with a closed plate (5-7) that is driven by electricity to rotate.

3. The annealing furnace for high-strength bolt processing according to claim 2, characterized by A pair of side frames (5-8) are provided on the side surface of the bottom box (4). A movable baffle (5-9) is horizontally and movably connected between the side frames (5-8). A number of exhaust holes (5-10) are opened on the surface of the movable baffle (5-9) and the side surface of the bottom box (4). The movable baffle (5-9) is connected by a linear drive.

4. The annealing furnace for high-strength bolt processing according to claim 3, characterized by A discharge pipe (5-11) is provided on one side of the bottom box (4), and a push auger (5-12) driven by electricity is installed in the bottom box (4) and the discharge pipe (5-11).

5. The annealing furnace for high strength bolt processing according to claim 1, characterized in that, The heating assembly (6) includes a top frame (6-1) which is fixed to the top of the outer shell (2). A pair of telescopic rods (6-2) are provided at the bottom of the top frame (6-1). The lower ends of the telescopic rods (6-2) pass through the surface of the outer shell (2) and are located inside. A heater (6-3) is connected to the lower ends of the telescopic rods (6-2).

6. An annealing furnace for processing high-strength bolts according to claim 5, characterized in that, The heater (6-3) is provided with a heat-conducting plate (6-4) on its surface, and the heater (6-3) is connected to the top frame (6-1) by a vertical linear drive.

7. The annealing furnace for high strength bolt processing according to claim 4, characterized by The bottom box (4) has an inclined surface on one side, and the bottom of the bottom box (4) has a semi-circular structure that matches the diameter of the push auger (5-12).

8. The annealing furnace for high strength bolt processing according to claim 1, characterized by The central part of the equipment rack (1) has a raised structure, and the raised part of the equipment rack (1) slides and fits against the bottom surface of the box (3).

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