Annealing furnace for heat treatment of die steel

Abstract

The invention discloses an annealing furnace for heat treatment of die steel, relates to the technical field of die steel heat treatment equipment, and aims to solve the problem of poor annealing quality caused by non-uniform heating and non-uniform nitrogen distribution of a traditional annealing furnace. The annealing furnace comprises a furnace body and a three-dimensional roll-over stand, heating wires are arranged on the two sides of the furnace body, a furnace door is arranged on the front face, and a first motor and a second motor on the back face are hinged to a rotating column of the three-dimensional roll-over stand through a rotating shaft body and a Y-shaped transmission frame; the middle of the three-dimensional roll-over stand is twisted, two ends of the three-dimensional roll-over stand are vertical, and a cross-shaped mounting frame on the inner side fixes die steel through a clamping block with The nitrogen spraying and sweeping mechanism on the top of the furnace body drives a rotating frame, a sliding rod and a rotating shaft rod through a third motor to drive a plurality of nitrogen spraying pipes on a swinging frame to conduct swinging spraying and sweeping. Multi-dimensional overturning of the die steel is achieved through the three-dimensional overturning frame, and it is guaranteed that heating is uniform; the positions of the clamping blocks are adjustable, and the universality is high; nitrogen spraying and sweeping are uniform, annealing quality is effectively improved, and annealing time is shortened.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for mold steel, and more specifically to an annealing furnace for heat treatment of mold steel. Background Technology

[0002] Annealing is a crucial step in the production and processing of mold steel. Its purpose is to reduce the hardness of the mold steel, improve its machinability, and eliminate internal stress. Currently, most annealing furnaces place the mold steel on a fixed support for heating and annealing. However, this traditional method has significant drawbacks: because the mold steel is stationary, heat cannot be evenly distributed throughout the furnace, resulting in uneven heating. This not only prolongs annealing time and reduces production efficiency but also affects the annealing quality, leading to unstable properties of the mold steel. Furthermore, although some annealing furnaces are equipped with nitrogen protection devices, the uneven distribution of nitrogen within the furnace fails to provide adequate protection, further impacting the heat treatment effect on the mold steel.

[0003] Therefore, it is of great significance to provide an annealing furnace for heat treatment of mold steel to solve the problems existing in the prior art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide an annealing furnace for heat treatment of mold steel to solve the problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An annealing furnace for heat treatment of mold steel includes a furnace body and a three-dimensional tilting frame.

[0007] Heating wires are installed on both sides inside the furnace body, a furnace door is installed on the front, and a first motor and a second motor are installed on the back. The output shaft of the first motor is driven to a rotating shaft one, and the output shaft of the second motor is driven to a rotating shaft two. The end of the rotating shaft one is hinged to a Y-shaped transmission frame one, and the end of the rotating shaft two is hinged to a Y-shaped transmission frame two.

[0008] The three-dimensional flipping frame is a rectangular frame structure with its central part twisted at a 90-degree angle and its two ends arranged perpendicularly at a 90-degree angle. One end of the three-dimensional flipping frame has a rotating column one, and the other end has a rotating column two. The rotating column one is hinged to the end of the Y-shaped transmission frame one, and the rotating column two is hinged to the end of the Y-shaped transmission frame two. A cross-shaped mounting frame is fixedly connected to the inner side of the three-dimensional flipping frame. The surface of the cross-shaped mounting frame has a mounting groove, in which a clamping block is fixed by locking bolts.

[0009] The top of the furnace body is equipped with a nitrogen purging mechanism, which includes a swing frame, nitrogen nozzles, a third motor, a rotating frame, a slide bar, a hinge shaft, and a rotating shaft. The rotating shaft is installed inside the furnace body. The swing frame is hinged to the rotating shaft. The nitrogen nozzles are fixedly installed on the swing frame and arranged above the three-dimensional rotating frame. There are multiple nitrogen nozzles arranged in a straight line. One end of the slide bar is hinged to the rotating shaft via the hinge shaft, and the other end is slidably connected to the rotating frame. The nitrogen nozzles are connected to a nitrogen source via high-temperature resistant flexible pipes. The third motor is installed on the top of the furnace body, and its output end is connected to the rotating frame.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. This invention sets up a three-dimensional flipping frame, using a first motor and a second motor to drive the first rotating shaft and the second rotating shaft to rotate respectively. Then, through the first Y-type transmission frame and the second Y-type transmission frame, the three-dimensional flipping frame is driven to achieve multi-dimensional flipping, so that the mold steel placed on the three-dimensional flipping frame can come into contact with the heat in the furnace in all directions, the heating is more uniform, the annealing time is effectively shortened, and the annealing quality is improved.

[0012] 2. The cross mounting bracket inside the three-dimensional flipping frame is equipped with mounting slots and clamping blocks. The position of the clamping blocks can be adjusted by tightening bolts, thereby adapting to the fixing of mold steel of different specifications and improving the versatility of the equipment.

[0013] 3. In the nitrogen spraying mechanism at the top of the furnace, a third motor drives a rotating frame to rotate, which in turn drives a sliding rod to move. The sliding rod, through a hinged shaft, pushes a rotating shaft to rotate, which in turn causes the swinging frame to swing the nitrogen nozzles. Multiple nitrogen nozzles arranged in a straight line swing and spray nitrogen directly above the three-dimensional tilting frame, ensuring that the nitrogen is evenly distributed within the furnace, fully utilizing the protective effect of nitrogen, and further improving the heat treatment effect of the mold steel.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0015] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a side view of the three-dimensional flipping frame in this invention;

[0019] Figure 3 This is a cross-sectional view of the present invention.

[0020] In the diagram: 1. Furnace body; 2. Heating wire; 3. Furnace door; 4. Three-dimensional tilting frame; 5. Cross mounting frame; 6. Y-type transmission frame one; 7. Rotating shaft one; 8. First motor; 9. Rotating shaft two; 10. Second motor; 11. Y-type transmission frame two; 12. Nitrogen nozzle; 13. Swing frame; 14. Third motor; 15. Rotating frame; 16. Slide rod; 17. Hinge shaft; 18. Rotating shaft; 19. Clamping block; 20. Locking bolt; 21. Mounting slot; 22. Rotating column two; 23. Rotating column one. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0022] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0023] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0024] It should also 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.

[0025] Please see Figure 1-3 This invention provides a technical solution for an annealing furnace used in the heat treatment of mold steel:

[0026] An annealing furnace for heat treatment of mold steel includes a furnace body 1 and a three-dimensional tilting frame 4. Heating wires 2 are installed on both sides inside the furnace body 1 to provide the heat required for annealing inside the furnace; a furnace door 3 is installed on the front of the furnace body 1 via a hinge, and an observation window is provided on the furnace door 3 to facilitate the observation of the annealing process inside the furnace by the staff.

[0027] A first motor 8 and a second motor 10 are fixed to the back of the furnace body 1 via motor mounting brackets. Both the first motor 8 and the second motor 10 are servo motors. The output shaft of the first motor 8 is connected to the rotating shaft 7 via a coupling, and the output shaft of the second motor 10 is connected to the rotating shaft 9 via a coupling. Both rotating shafts 7 and 9 pass through the rear wall of the furnace body 1 and extend into the interior of the furnace body 1. A Y-type transmission frame 6 is hinged to the end of rotating shaft 7 via a pin, and a Y-type transmission frame 11 is hinged to the end of rotating shaft 9 via a pin.

[0028] The three-dimensional flipping frame 4 is a rectangular frame structure made of stainless steel, with its middle section twisted at a 90-degree angle and its two ends arranged perpendicularly at a 90-degree angle. A rotating column 1 23 is welded to one end of the three-dimensional flipping frame 4, and a rotating column 22 is welded to the other end. The rotating column 1 23 is hinged to the end of the Y-type transmission frame 1 6 via a pin, and the rotating column 22 is hinged to the end of the Y-type transmission frame 2 11 via a pin. A cross-shaped mounting frame 5 is welded to the inner side of the three-dimensional flipping frame 4. A mounting groove 21 is formed on the surface of the cross-shaped mounting frame 5, and a clamping block 19 is provided in the mounting groove 21. The clamping block 19 has a through hole that mates with the mounting groove 21. A locking bolt 20 passes through the through hole and the mounting groove 21 to fix the clamping block 19 to the cross-shaped mounting frame 5.

[0029] A nitrogen purging mechanism is installed on the top of the furnace body 1. This mechanism includes a swing frame 13, nitrogen nozzles 12, a third motor 14, a rotating frame 15, a sliding rod 16, a hinge shaft 17, and a rotating shaft 18. The rotating shaft 18 is mounted on the top of the furnace body 1 via a bearing seat. The swing frame 13 is fixedly connected to the rotating shaft 18 by welding. Five nitrogen nozzles 12 are fixedly mounted on the swing frame 13 using pipe clamps, arranged evenly along a straight line with their nozzles facing the three-dimensional rotating frame 4. One end of the sliding rod 16 is hinged to one end of the rotating shaft 18 via the hinge shaft 17, and the other end is slidably connected to the rotating frame 15 via a slider. The rotating frame 15 has a groove that mates with the slider. The nitrogen nozzles 12 are connected to a nitrogen source via a high-temperature resistant flexible pipe. A valve is installed on the high-temperature resistant flexible pipe to control the nitrogen flow rate. The third motor 14 is mounted on the top of the furnace body 1 via a motor bracket, and its output end is connected to the rotating frame 15 via a coupling.

[0030] In this embodiment, the furnace door 3 is first opened. The position of the clamping block 19 on the cross mounting frame 5 is adjusted according to the specifications of the mold steel. The clamping block 19 is then fixed using the locking bolts 20. The mold steel is then placed on the cross mounting frame 5 and clamped by the clamping block 19. The furnace door 3 is closed, and the heating wire 2 is activated to heat the furnace. Simultaneously, the first motor 8 and the second motor 10 are activated. The first motor 8 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the rotating column 23 to rotate via the Y-shaped transmission frame 6. The second motor 10 drives the rotating shaft 9 to rotate, and the rotating shaft 9 drives the rotating column 22 to rotate via the Y-shaped transmission frame 11. This allows the three-dimensional flipping frame 4 to achieve multi-dimensional flipping, ensuring the mold steel is heated evenly during the flipping process. Simultaneously, the third motor 14 is started and the nitrogen source valve is opened. The third motor 14 drives the rotating frame 15 to rotate. The rotating frame 15 drives the sliding rod 16 to move through the slider. The sliding rod 16 pushes the rotating shaft 18 to rotate through the hinge shaft 17. The rotating shaft 18 drives the swing frame 13 to swing. The swing frame 13 drives the nitrogen nozzle 12 to swing. The nitrogen nozzle 12 evenly sprays nitrogen into the furnace to provide a protective atmosphere for the annealing of the mold steel. After annealing, the heating wire 2, the first motor 8, the second motor 10, and the third motor 14 are turned off, and the nitrogen source valve is closed. After the furnace temperature drops to a suitable level, the furnace door 3 is opened, and the mold steel can be removed.

[0031] The above description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations to these embodiments within the spirit and principles of the present invention, achieved through conventional substitutions or by achieving the same function without departing from the principles and spirit of the present invention, fall within the scope of protection of the present invention.

Claims

1. An annealing furnace for heat treatment of mold steel, characterized in that, The furnace includes a furnace body (1) and a three-dimensional rotating frame (4). A first motor (8) and a second motor (10) are installed on the back of the furnace body (1). The output shaft of the first motor (8) is connected to a rotating shaft (7), and the output shaft of the second motor (10) is connected to a rotating shaft (9). A Y-shaped transmission frame (6) is hinged to the end of the rotating shaft (7), and a Y-shaped transmission frame (11) is hinged to the end of the rotating shaft (9). The three-dimensional flipping frame (4) is a rectangular frame structure with its middle part twisted at ninety degrees and its two ends arranged at ninety degrees perpendicularly. One end of the three-dimensional flipping frame (4) is provided with a rotating column one (23), and the other end is provided with a rotating column two (22). The rotating column one (23) is hinged to the end of the Y-shaped transmission frame one (6), and the rotating column two (22) is hinged to the end of the Y-shaped transmission frame two (11). The inner side of the three-dimensional flipping frame (4) is fixedly connected to a cross mounting bracket (5), and the top of the furnace body (1) is provided with a nitrogen spraying mechanism.

2. An annealing furnace for heat treatment of mold steel according to claim 1, characterized in that, The nitrogen spraying mechanism includes a swing frame (13), a nitrogen nozzle (12), a third motor (14), a rotating frame (15), a slide bar (16), a hinge shaft (17), and a rotating shaft (18).

3. An annealing furnace for heat treatment of mold steel according to claim 2, characterized in that, The rotating shaft (18) is installed inside the furnace body (1), the swing frame (13) is hinged to the rotating shaft (18), and the nitrogen spray pipe (12) is fixedly installed on the swing frame (13).

4. An annealing furnace for heat treatment of mold steel according to claim 2, characterized in that, One end of the slide rod (16) is hinged to the rotating shaft (18) via the hinge shaft (17), and the other end is slidably connected to the rotating frame (15).

5. An annealing furnace for heat treatment of mold steel according to claim 2, characterized in that, The nitrogen nozzle (12) is connected to the nitrogen source through a high-temperature resistant flexible pipe, and the third motor (14) is installed on the top of the furnace body (1), with its output end connected to the rotating frame (15).

6. An annealing furnace for heat treatment of mold steel according to claim 1, characterized in that, The surface of the cross mounting bracket (5) is provided with a mounting groove (21), and a clamping block (19) is fixed in the mounting groove (21) by a locking bolt (20).

7. An annealing furnace for heat treatment of mold steel according to claim 2, characterized in that, The nitrogen nozzles (12) are arranged directly above the three-dimensional flipping frame (4), and there are multiple of them, arranged in a straight line.

8. An annealing furnace for heat treatment of mold steel according to claim 1, characterized in that, The furnace body (1) has heating wires (2) on both sides inside, and a furnace door (3) installed on the front.

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