Annealing device and method for ferrous metal smelting and rolling

Abstract

The present invention discloses an annealing device and method for ferrous metal smelting and rolling, and relates to the technical field of ferrous metal annealing. The annealing device and method for ferrous metal smelting and rolling include a box body, a gas storage box for storing protective gas fixed on the side wall of the box body, an air pump connected to the gas storage box for delivering protective gas into the box body through a delivery pipe, and a support assembly for placing the ferrous metal product to be annealed, an adaption assembly for changing the position of the contact point, and an adjustment assembly for changing the coverage of the protective gas. The support assembly includes: a fixed frame, which is slidably installed in the box body to provide support for the ferrous metal product to be annealed; an inner frame, which is slidably installed in the fixed frame and changes the contact point with the ferrous metal product under external force. This ensures that the protective gas can be more evenly distributed around the workpiece, avoiding local oxidation or decarburization caused by uneven airflow.

Description

Technical Field

[0001] The present invention relates to the technical field of ferrous metal annealing, in particular to an annealing device and method for ferrous metal smelting and rolling. Background Art

[0002] Ferrous metals generally refer to iron, chromium, manganese and their alloys, mainly iron-based alloys, the most common of which are various types of steel and cast iron. During the rolling process of these ferrous metal products, the metal materials will undergo plastic deformation, which may cause large residual stresses inside. Annealing can effectively eliminate these stresses and prevent the materials from deforming or cracking during subsequent processing or use. Currently, box-type annealing furnaces are usually used for annealing operations. However, when ferrous metal materials are placed on the placement racks of the box-type annealing furnaces for annealing, there is contact between the ferrous metal materials and the placement racks, and the contact points cannot be effectively covered by the protective gas, resulting in oxidation or decarburization problems at some locations on the surface of the ferrous metal materials, affecting product quality.

[0003] For example, the box-type annealing furnace disclosed in Publication No. CN217265866U, although vent holes are provided on the placement rack to facilitate sufficient heating, there are still parts that cannot directly contact the protective gas, resulting in oxidation or decarburization of parts of the surface of the ferrous metal material. The sample loading and unloading device and method for use for the box-type annealing furnace disclosed in Publication No. CN106435136B, although it can improve the efficiency of sample loading and unloading, still has the problem that after the trolley places the ferrous metal material on the placement rack in the furnace, the contact points are not easily protected by the protective gas, resulting in oxidation or decarburization.

[0004] Therefore, an annealing device and method for ferrous metal smelting and rolling are proposed. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an annealing device and method for ferrous metal smelting and rolling, which solves the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an annealing device for ferrous metal smelting and rolling, comprising a box body and a box door movably mounted on the box body, a gas storage box for storing protective gas fixed to the side wall of the box body, the gas storage box being connected to an air pump for delivering protective gas into the box body through a delivery pipe, the box body being provided with a support assembly for placing the ferrous metal product to be annealed, an adaptation assembly for changing the position of the contact point, and an adjustment assembly for changing the coverage of the protective gas, wherein the support assembly comprises:

[0007] Fixed frame, slidably mounted in the box, provides support for the ferrous metal products to be annealed;

[0008] The inner frame is slidably installed in the fixed frame and changes the contact point with the ferrous metal product under the drive of external force;

[0009] The adaptation components include:

[0010] The bump is located inside the box and drives the inner frame to move under the drive of external force;

[0011] One end of the power rod is slidably inserted into the protrusion to transmit the power required for the movement of the inner frame.

[0012] Preferably, the support assembly further includes:

[0013] A guide rod, one end of which is fixed to the bottom of the fixing frame, and the other end of which is slidably arranged in the box body to limit the moving direction of the fixing frame;

[0014] Rollers, movably mounted within the inner frame, contact and provide support for the ferrous metal product.

[0015] Preferably, the adaptation component further includes:

[0016] a sliding rod, one end of which is fixed to the side wall of the inner frame;

[0017] A sliding sleeve, one end of which is slidingly sleeved outside the sliding rod and the other end of which is slidingly inserted into the fixed frame to limit the moving direction of the sliding rod;

[0018] The support rod has side walls fixed to the side walls of the sliding sleeve to provide support for the sliding sleeve;

[0019] The driven rod has one end fixed on the side wall of the supporting rod.

[0020] Preferably, the adaptation component further includes:

[0021] The guide plate is slidably sleeved on the other end of the driven rod, and the side wall is fixed on the other end of the power rod to limit the moving direction of the driven rod;

[0022] A driven shaft, one end of which is fixed to the side wall of the protrusion, and the side wall is movably mounted in the box;

[0023] The driven gear has a side wall fixed on the other end of the driven shaft.

[0024] Preferably, the adaptation component further includes:

[0025] A power gear meshing with the driven gear;

[0026] An output shaft, one end of which is fixed to the side wall of the power gear;

[0027] The power motor has an output end fixedly connected to the other end of the output shaft to provide power for the operation of the adaptation component.

[0028] By adapting the components to drive the inner frame to move back and forth in the fixed frame, the roller and the ferrous metal product are connected in a rolling manner, so that the contact point can be changed instead of being fixed in one place, ensuring that the shielding gas can be more evenly distributed around the workpiece, avoiding local oxidation or decarburization caused by uneven airflow.

[0029] Preferably, the adjustment component includes:

[0030] A movable shaft, one end of which is movably arranged in the box;

[0031] A fixed frame, one end of which is fixed to the side wall of the movable shaft;

[0032] The rotating shaft is movably mounted on the side wall of the fixed frame;

[0033] The air induced plate is fixed on the side wall of the rotating shaft to change the flow direction of the protective gas.

[0034] Preferably, the adjustment component further includes:

[0035] a spring, one end of which is fixed to the side wall of the fixed frame;

[0036] The extrusion plate is slidably installed in the fixed frame, and the side wall is fixed on the other end of the spring to change the angle of the air induction plate;

[0037] One end of the sliding ring is slidably inserted into the extrusion plate.

[0038] Preferably, the adjustment component further includes:

[0039] The arc-shaped sleeve and the sliding sleeve are arranged on the sliding ring;

[0040] A sliding block, the side wall of which is slidably abutted against the side wall of the extrusion plate;

[0041] The adjusting push rod has one end fixed in the box body and the other end fixed on the side wall of the sliding block to drive the extrusion plate to move.

[0042] The present invention also provides an operating method for an annealing device for ferrous metal smelting and rolling, comprising the following steps:

[0043] S1. Place the ferrous metal product to be annealed on the support assembly, close the box door, and start the air pump to deliver the protective gas from the gas storage box into the box through the delivery pipe;

[0044] S2, start the box to perform annealing operation;

[0045] S3, start the adaptation component to change the contact point between the ferrous metal product and the support component;

[0046] S4, start the regulating component to change the flow angle of the protective gas into the box;

[0047] S5. After the annealing operation is completed, the ferrous metal products are taken out.

[0048] Preferably, the movement range of the inner frame in the support assembly is between 5-10 cm.

[0049] The present invention provides an annealing device and method for ferrous metal smelting and rolling. Compared with the prior art, it has the following advantages:

[0050] (1) The annealing device and method for ferrous metal smelting and rolling effectively isolate oxygen, avoid the occurrence of oxidation, help maintain the carbon content on the surface of the material, maintain the required physical and chemical properties, and help obtain a cleaner and smoother surface, which is very important for subsequent processing steps (such as polishing, plating, etc.). It can reduce the cost and complexity of surface treatment, and at the same time reduce the oxidation loss of refractory materials and heating elements in the furnace, help extend the service life of the annealing furnace, and reduce maintenance costs.

[0051] (2) The annealing device and method for ferrous metal smelting and rolling ensure that the protective gas can be more evenly distributed around the workpiece, avoiding local oxidation or decarburization caused by uneven airflow, which helps to maintain the consistency and high quality of the workpiece surface, ensures that each workpiece can obtain the best protective atmosphere conditions, reduces the formation of oxide scale or other surface defects caused by local hypoxia, and thus improves the quality and consistency of the final product. Good atmosphere control is conducive to achieving ideal microstructural transformation, which is crucial to ensuring that the material achieves the expected mechanical properties (such as strength, hardness and toughness). By improving the utilization efficiency of the protective gas and reducing the amount of protective gas excessively used to compensate for dead corners, the overall energy consumption cost is reduced, which can not only significantly improve product quality and production efficiency, but also bring economic and environmental benefits.

[0052] (3) The annealing device and method for ferrous metal smelting and rolling, by sliding the extrusion plate along the fixed frame, causes the extrusion plate to squeeze the air induction plate to move, so that the air induction plate can rotate with the rotation axis as the axis, thereby changing the inclination angle of the air induction plate, thereby changing the angle of the protective gas blown out through the air outlet, thereby changing the speed of the protective gas spreading around the multi-layer ferrous metal material; making the gas more evenly distributed around the workpiece, reducing or even eliminating the uneven distribution of the atmosphere, which helps to ensure that all workpieces or different parts of the same workpiece can obtain a consistent heat treatment effect, avoiding local oxidation, decarburization or other surface defects.

[0053] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0055] Figure 2 Another perspective structural diagram of the overall structure of the present invention;

[0056] Figure 3 This is a positional structural diagram of the power motor of the present invention;

[0057] Figure 4 It is the position structure diagram of the air pump of the present invention;

[0058] Figure 5 This is a diagram showing the internal structure of the box of the present invention;

[0059] Figure 6 It is a side sectional structural diagram of the box body of the present invention;

[0060] Figure 7 This is a positional structural diagram of the driven gear of the present invention;

[0061] Figure 8 This is a schematic diagram of the assembled state of the sliding sleeve of the present invention;

[0062] Figure 9 Schematic diagram of the disassembled state of the sliding sleeve of the present invention;

[0063] Figure 10 Schematic diagram of the exploded state of the driven rod of the present invention;

[0064] Figure 11 Schematic diagram of the position of the sliding block of the present invention;

[0065] Figure 12 This is a schematic diagram of the assembled state of the sliding ring of the present invention;

[0066] Figure 13 This is a schematic diagram of the position of the arc sleeve of the present invention;

[0067] Figure 14 Schematic diagram of the disassembled state of the sliding ring of the present invention.

[0068] In the figure: 1. Box body; 11. Box door; 12. Air pump; 13. Delivery pipe; 14. Air storage box; 15. Fixed frame; 16. Guide rod; 17. Drainage block; 2. Power motor; 21. Output shaft; 22. Power gear; 23. Driven gear; 24. Driven shaft; 25. Bump; 26. Power rod; 27. Guide plate; 28. Driven rod; 29. ​​Support rod; 210. Sliding sleeve; 211. Sliding rod; 212. Inner frame; 213. Roller; 3. Movable shaft; 31. Fixed frame; 32. Air induced plate; 33. Rotating shaft; 34. Spring; 35. Extrusion plate; 36. Sliding ring; 37. Arc sleeve; 38. Sliding block; 39. Adjusting push rod. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0070] See also Figures 1 to 14 , the present invention provides the following technical solutions:

[0071] Example 1: An annealing device for ferrous metal smelting and rolling, comprising a box body 1, a box door 11 hingedly mounted on the box body 1, a gas storage box 14 for storing protective gas fixedly mounted on the side wall of the box body 1, the gas storage box 14 being connected to an air pump 12 via a delivery pipe 13, the air pump 12 being used to deliver protective gas into the box body 1, a support assembly for placing ferrous metal products to be annealed provided in the box body 1, the support assembly comprising: a fixing frame 15 and a guide rod 16, the fixing frame 15 being slidably disposed in the box body 1 to provide support for the ferrous metal products to be annealed;

[0072] One end of the guide rod 16 is fixedly mounted on the bottom of the fixing frame 15 , and the other end of the guide rod 16 is slidably inserted into the box body 1 . The guide rod 16 is used to limit the moving direction of the fixing frame 15 .

[0073] When in use, the box door 11 is opened, the rolled ferrous metal material to be annealed is placed in the fixed rack 15, the box door 11 is closed and the annealing operation is performed on the rolled ferrous metal material. During the annealing operation, the protective gas stored in the gas storage box 14 is transported to the box body 1 through the delivery pipe 13 by starting the air pump 12. At the same time, the flow direction of the protective gas entering the box body 1 can be guided by the guide block 17 installed on the inner side wall of the box body 1, so that the protective gas can be more evenly distributed around the ferrous metal material, so that the protective gas can fully protect the ferrous metal material on the fixed rack 15, and avoid oxidation or decarburization of the ferrous metal material undergoing annealing operation at high temperature. Then the protective gas flows back to the gas storage box 14 again through the reflux pipe at the bottom of the box body 1. After the annealing operation is completed, after the protective gas inside the box body 1 is recovered, the box door 11 is opened again to take the annealed ferrous metal material out of the fixed rack 15 for the next processing operation;

[0074] In another embodiment different from the above embodiment, the air pump 12 is replaced with a vacuum pump, and one of the side surfaces of the box body 1 is changed to be made of a flexible material. When the ferrous metal material in the box body 1 needs to be taken out, the protective gas in the box body 1 is extracted by the vacuum pump, and then the box door 11 is opened to take out the ferrous metal material.

[0075] Furthermore, a flexible bag is connected to the gas storage box 14 so that when the vacuum pump extracts the protective gas, the gas storage box 14 can be deformed to a certain extent, thereby being able to fully accommodate the protective gas extracted from the box body 1. At the same time, a purification component can be added to the gas storage box 14 to purify the protective gas in the gas storage box 14.

[0076] The technical solutions of this embodiment differ from those of the previous embodiment in that the support assembly further includes: an inner frame 212 and a roller 213. The inner frame 212 is slidably mounted within the fixed frame 15. The inner frame 212 changes its contact point with the ferrous metal product under the influence of an external force. The sidewall of the roller 213 is movably mounted within the inner frame 212 via a bearing. The roller 213 contacts and supports the ferrous metal product.

[0077] An adaptation assembly for changing the position of the contact point is provided in the housing 1. The adaptation assembly includes: a power motor 2, an output shaft 21, a power gear 22, a driven gear 23, a driven shaft 24, a bump 25, a power rod 26, a guide plate 27, a driven rod 28, a support rod 29, a sliding sleeve 210, and a sliding rod 211. The output end of the power motor 2 is fixedly connected to one end of the output shaft 21 via a coupling. The power motor 2 is used to provide power for the operation of the adaptation assembly. The other end of the output shaft 21 is fixedly mounted on the side wall of the power gear 22. The power gear 22 and the driven gear 23 are meshed with each other.

[0078] The side wall of the driven gear 23 is fixedly mounted on the other end of the driven shaft 24, and one end of the driven shaft 24 is fixedly mounted on the side wall of the protrusion 25. The side wall of the driven shaft 24 is movably mounted in the housing 1 through a bearing.

[0079] The entire protrusion 25 is located inside the box body 1, and the protrusion 25 drives the inner frame 212 to move under the driving force of an external force;

[0080] One end of the power rod 26 is slidably inserted into the protrusion 25. The power rod 26 is used to transmit the power required for the movement of the inner frame 212. The side wall of the guide plate 27 is slidably mounted on the other end of the driven rod 28. The side wall of the guide plate 27 is fixedly mounted on the other end of the power rod 26. The guide plate 27 is used to limit the movement direction of the driven rod 28.

[0081] One end of the driven rod 28 is fixedly mounted on the side wall of the support rod 29, and the side wall of the support rod 29 is fixedly mounted on the side wall of the sliding sleeve 210. The support rod 29 is used to provide support for the sliding sleeve 210;

[0082] One end of the sliding sleeve 210 is slidably mounted outside the sliding rod 211, and the other end of the sliding sleeve 210 is slidably mounted inside the fixing frame 15. The sliding sleeve 210 is used to limit the movement direction of the sliding rod 211.

[0083] One end of the sliding rod 211 is fixedly mounted on the side wall of the inner frame 212 .

[0084] When in use, an inner frame 212 is added to the fixed frame 15, and rollers 213 are evenly distributed on the inner frame 212. When the annealing operation is performed, the power motor 2 is started by the control center, and the power motor 2 drives the output shaft 21 to rotate, and the output shaft 21 drives the power gear 22 to rotate, and the power gear 22 drives the driven gear 23 to rotate, and the driven gear 23 drives the driven shaft 24 to rotate. The box body 1 provides support force to the driven shaft 24. When the driven shaft 24 rotates, it drives the protrusion 25 to rotate synchronously. When the protrusion 25 rotates with the driven shaft 24 as the axis, due to the sliding cooperation between the power rod 26, the power rod 26 will reciprocate under the drive of the protrusion 25. When the power rod 26 moves, it synchronously drives the guide plate 27 to move left and right.

[0085] The guide plate 27 drives the driven rod 28 to move synchronously. When the driven rod 28 moves, it drives the support rod 29 to move synchronously. The support rod 29 drives the multiple sliding sleeves 210 to move synchronously. The sliding sleeves 210 and the fixed frame 15 slide together. At the same time, the sliding sleeves 210 and the sliding rods 211 slide together, so that the support rod 29 can synchronously drive the sliding rods 211 to move through the sliding sleeves 210, thereby causing the sliding rods 211 to drive the inner frame 212 to move, and the inner frame 212 drives the roller 213 to move, so that the roller 213 and the ferrous metal material move relative to each other. The ferrous metal material will also move to a certain extent during the movement of the inner frame 212, but the ferrous metal material will touch the fixed frame 15 during the movement, so that it will not fall out of the fixed frame 15.

[0086] After completing the annealing operation on the ferrous metal material, the fixing frame 15 is removed from the box body 1, so that the fixing frame 15 drives the guide rod 16 to move, and the guide rod 16 slides with the box body 1, so that the fixing frame 15 and the guide rod 16 can move linearly under the action of an external force, thereby causing the fixing frame 15 to drive the sliding sleeve 210 to move, the sliding sleeve 210 drives the support rod 29 to move, and the support rod 29 drives the driven rod 28 to move, and the driven rod 28 slides with the guide plate 27, so that the fixing frame 15 and the inner frame 212 are moved outside the box body 1. At this time, the ferrous metal material on the inner frame 212 can be taken out.

[0087] The technical solutions of this embodiment differ from those of the previous embodiment in that: an adjustment component for changing the degree of shielding gas coverage is provided in the housing 1, and the adjustment component includes: a movable shaft 3, a fixed frame 31, an air induction plate 32, a rotating shaft 33, a spring 34, a squeeze plate 35, a sliding ring 36, an arc-shaped sleeve 37, a sliding block 38, and an adjustment push rod 39; one end of the movable shaft 3 is movably inserted into the housing 1 via a bearing; one end of the fixed frame 31 is fixedly mounted on the side wall of the movable shaft 3; both ends of the rotating shaft 33 are movably mounted on the side wall of the fixed frame 31 via bearings; the air induction plate 32 is fixedly mounted on the side wall of the rotating shaft 33; the air induction plate 32 is used to change the flow direction of the shielding gas;

[0088] One end of the spring 34 is fixedly mounted on the side wall of the fixed frame 31. Both ends of the extrusion plate 35 are slidably inserted into the fixed frame 31. The side wall of the extrusion plate 35 is fixedly mounted on the other end of the spring 34. The extrusion plate 35 is used to change the angle of the air induction plate 32.

[0089] One end of the sliding ring 36 is slidably installed in the extrusion plate 35, the arc sleeve 37 is slidably installed on the sliding ring 36, the side wall of the sliding block 38 slides against the side wall of the extrusion plate 35, one end of the adjusting push rod 39 is fixedly installed in the box body 1, and the other end of the adjusting push rod 39 is fixedly installed on the side wall of the sliding block 38. The adjusting push rod 39 is used to drive the extrusion plate 35 to move.

[0090] When in use, during the annealing operation, the movable shaft 3 is directly driven to rotate by a driving element, and the movable shaft 3 drives the fixed frame 31 to rotate, and the fixed frame 31 drives the air induction plate 32 to rotate synchronously with the movable shaft 3 as the axis, so that the air induction plate 32 can move at the air inlet, so that most of the protective gas blown into the box body 1 can flow to the side wall inside the box body 1 under the guidance of the air induction plate 32, and then flow to between the ferrous metal materials of each layer on the inner frame 212 under the action of the guide block 17 installed on the side wall, so as to fully wrap the outside of the multiple layers of ferrous metal materials being annealed on the inner frame 212, and a small amount of protective gas is directly blown to the topmost ferrous metal material and expands outward along the surface of the ferrous metal material;

[0091] When it is necessary to change the angle at which the shielding gas flows through the induced draft plate 32 and the drainage block 17 to the ferrous metal material, the control center controls the adjustment push rod 39 to start, and the adjustment push rod 39 drives the sliding block 38 to move, and the sliding block 38 drives the lower half of the extrusion plate 35 to move, so that the extrusion plate 35 can move toward the side close to the inner wall of the box body 1, and the extrusion plate 35 drives the sliding ring 36 to move, and the sliding ring 36 drives the arc sleeve 37 to move, so that the three groups of sliding rings 36 move away from each other and expand. During the expansion, the sliding block 38 can always be in sliding contact with at least one extrusion plate 35, thereby ensuring that the three groups of extrusion plates 35 after expansion can remain in their positions;

[0092] By controlling the adjustment push rod 39, the sliding block 38 is driven to move toward the center of the box body 1, so that the sliding block 38 releases the squeeze plate 35, so that the squeeze plate 35 can move toward the side where the movable shaft 3 is located under the action of the spring 34. The squeeze plate 35 drives the sliding ring 36 to move, and the sliding ring 36 drives the arc sleeve 37 to move, so that the three groups of sliding rings 36 are close to each other and contract. When contracting, the sliding block 38 can always slide in contact with at least one squeeze plate 35, thereby ensuring that the three groups of squeeze plates 35 can still remain in their positions after contraction.

[0093] The squeezing plate 35 slides along the fixing frame 31, thereby squeezing the air inducing plate 32 to move, so that the air inducing plate 32 can rotate around the rotating shaft 33, thereby changing the inclination angle of the air inducing plate 32, thereby changing the angle of the shielding gas blown out through the air outlet, and thus changing the speed of the shielding gas spreading around the multi-layer ferrous metal material;

[0094] Make the gas more evenly distributed around the workpiece, reducing or even eliminating uneven atmosphere distribution.

[0095] In another embodiment different from the aforementioned embodiment, the movable shaft 3 is no longer driven to rotate directly, but a group of transmission structures are used to enable the power motor 2 to drive the movable shaft 3 to rotate, so that the movable shaft 3 drives the air induced plate 32 to rotate at a speed that adapts to the rotation speed of the protrusion 25, so that when the inner frame 212 moves, the air induced plate 32 guides the flow of the protective airflow, so that the airflow can be faster when it is spread around the ferrous metal material, and there will be no blind spots. By optimizing the gas flow direction, the utilization efficiency of the protective gas can be improved, unnecessary waste can be reduced, and no additional energy input is required to drive the adjustment component, which helps to improve the energy utilization efficiency of the entire device and achieve the purpose of energy saving and emission reduction.

[0096] In another embodiment different from the aforementioned embodiment, the movable shaft 3 is not driven to rotate by any driving element, and one of the side walls of the fixed frame 31 is set to be an opening, and the protective gas sprayed from the air outlet impacts the air induced plate 32, thereby driving the air induced plate 32 to rotate, thereby changing the flow direction of the protective gas.

[0097] The embodiment of the present invention further provides an operating method for an annealing device for ferrous metal smelting and rolling, comprising the following steps:

[0098] S1. Place the ferrous metal product to be annealed on the support assembly, close the box door 11, and start the air pump 12 to deliver the protective gas from the gas storage box 14 to the box body 1 through the delivery pipe 13;

[0099] S2, start box 1 to perform annealing operation;

[0100] S3, start the adaptation component to change the contact point between the ferrous metal product and the support component;

[0101] S4, start the regulating component to change the flow angle of the protective gas entering the box 1;

[0102] S5. After the annealing operation is completed, take out the ferrous metal products

[0103] In particular, the movement range of the inner frame 212 in the support assembly is between 5-10 cm.

[0104] In summary, the present invention can effectively isolate oxygen, avoid the occurrence of oxidation, help maintain the carbon content on the surface of the material, maintain the desired physical and chemical properties, and help obtain a cleaner and smoother surface, which is very important for subsequent processing steps (such as polishing, plating, etc.). It can reduce the cost and complexity of surface treatment, and at the same time reduce the oxidation loss of refractory materials and heating elements in the furnace, which helps to extend the service life of the annealing furnace and reduce maintenance costs.

[0105] In summary, the present invention can ensure that the protective gas can be more evenly distributed around the workpiece, avoiding local oxidation or decarburization caused by uneven airflow, which helps to maintain the consistency and high quality of the workpiece surface, ensure that each workpiece can obtain the best protective atmosphere conditions, reduce the formation of oxide scale or other surface defects caused by local hypoxia, thereby improving the quality and consistency of the final product. Good atmosphere control is conducive to achieving ideal microstructural transformation, which is crucial to ensuring that the material achieves the expected mechanical properties (such as strength, hardness and toughness). By improving the utilization efficiency of the protective gas and reducing the amount of protective gas excessively used to compensate for dead corners, the overall energy consumption cost is reduced, which can not only significantly improve product quality and production efficiency, but also bring economic and environmental benefits.

[0106] In summary, the present invention can make the extrusion plate 35 slide along the fixed frame 31, so that the extrusion plate 35 squeezes the air induced plate 32 to move, and the air induced plate 32 can rotate around the rotating shaft 33, thereby changing the inclination angle of the air induced plate 32, thereby changing the angle of the protective gas blown out through the air outlet, thereby changing the speed of the protective gas spreading around the multi-layer ferrous metal material; making the gas more evenly distributed around the workpiece, reducing or even eliminating the uneven distribution of the atmosphere, which helps to ensure that all workpieces or different parts of the same workpiece can obtain consistent heat treatment effects, avoiding local oxidation, decarburization or other surface defects.

[0107] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0108] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0109] Parallel: The parallel defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the two sides are not absolutely parallel due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angle errors are allowed. For example, within an assembly error range of 10 degrees, it can be understood as a parallel relationship.

[0110] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0111] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An annealing device for ferrous metal smelting and rolling, comprising a box body (1) and a box door (11) movably mounted on the box body (1), characterized in that: A gas storage box (14) for storing protective gas is fixed on the side wall of the box (1), and the gas storage box (14) is connected to an air pump (12) for conveying protective gas into the box (1) through a conveying pipe (13). The box (1) is provided with a support assembly for placing the ferrous metal product to be annealed, an adaption assembly for changing the position of the contact point, and an adjustment assembly for changing the coverage of the protective gas. The support assembly includes: A fixed frame (15) is slidably mounted in the box (1) to provide support for the ferrous metal product to be annealed; An inner frame (212) is slidably mounted in the fixed frame (15) and changes the contact point with the ferrous metal product under the driving force of an external force; A guide rod (16), one end of which is fixed to the bottom of the fixing frame (15), and the other end of which is slidably arranged in the box body (1) to limit the moving direction of the fixing frame (15); A roller (213) is movably mounted in the inner frame (212) to contact and support the ferrous metal product; The adaptation components include: The protrusion (25) is located in the box (1) and drives the inner frame (212) to move under the driving force of an external force; A power rod (26) has one end slidingly inserted into the protrusion (25) to transmit the power required for the movement of the inner frame (212); A sliding rod (211), one end of which is fixed to the side wall of the inner frame (212); A sliding sleeve (210), one end of which is slidably sleeved outside the sliding rod (211) and the other end of which is slidably inserted into the fixing frame (15) to limit the moving direction of the sliding rod (211); A support rod (29) having a side wall fixed to the side wall of the sliding sleeve (210) to provide support for the sliding sleeve (210); A driven rod (28), one end of which is fixed to the side wall of the support rod (29); The guide plate (27) is slidably sleeved on the other end of the driven rod (28), and the side wall is fixed on the other end of the power rod (26) to limit the moving direction of the driven rod (28).

2. The annealing device for ferrous metal smelting and rolling according to claim 1, characterized in that: The adaptation component also includes: A driven shaft (24) has one end fixed to the side wall of the protrusion (25), and the side wall is movably mounted in the box (1); The side wall of the driven gear (23) is fixed on the other end of the driven shaft (24).

3. The annealing device for ferrous metal smelting and rolling according to claim 2, characterized in that: The adaptation component also includes: A power gear (22) meshed with a driven gear (23); An output shaft (21), one end of which is fixed to the side wall of the power gear (22); The power motor (2) has an output end fixedly connected to the other end of the output shaft (21) to provide power for the operation of the adaptation component.

4. The annealing device for ferrous metal smelting and rolling according to claim 1, characterized in that: The regulating component includes: A movable shaft (3), one end of which is movably arranged in the box body (1); A fixed frame (31), one end of which is fixed to the side wall of the movable shaft (3); A rotating shaft (33) is movably mounted on a side wall of the fixed frame (31); The air induction plate (32) is fixed on the side wall of the rotating shaft (33) to change the flow direction of the protective gas.

5. The annealing device for ferrous metal smelting and rolling according to claim 4, characterized in that: The adjustment component also includes: A spring (34), one end of which is fixed to the side wall of the fixed frame (31); The extrusion plate (35) is slidably inserted into the fixed frame (31), and the side wall is fixed to the other end of the spring (34) to change the angle of the air induction plate (32); One end of the sliding ring (36) is slidably inserted into the extrusion plate (35).

6. The annealing device for ferrous metal smelting and rolling according to claim 5, characterized in that: The adjustment component also includes: An arc-shaped sleeve (37), a sliding sleeve provided on the sliding ring (36); A sliding block (38) having a side wall that slides against the side wall of the extrusion plate (35); An adjusting push rod (39) is fixed at one end in the box (1) and at the other end on the side wall of the sliding block (38) to drive the extrusion plate (35) to move.

7. An operating method for an annealing device for ferrous metal smelting and rolling according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Place the ferrous metal product to be annealed on the support assembly, close the box door (11), and start the air pump (12) to transport the protective gas from the gas storage box (14) to the box body (1) through the delivery pipe (13); S2, start the box (1) to perform annealing operation; S3, start the adaptation component to change the contact point between the ferrous metal product and the support component; S4, starting the regulating component to change the flow angle of the protective gas entering the box (1); S5. After the annealing operation is completed, the ferrous metal products are taken out.

8. The method for operating a ferrous metal smelting and rolling annealing device according to claim 7, characterized in that: The movement range of the inner frame (212) in the support assembly is between 5-10 cm.

Images