Batch oxygen-exclusion hot rolling system and method for anaerobic special alloy

Abstract

The application discloses an anaerobic special alloy batch oxygen-isolated hot rolling system and method, and belongs to the technical field of metal material rolling processing. The application aims to solve the technical problems of easy oxidation of anaerobic special alloy (such as nickel-based, cobalt-based and titanium-based high-temperature alloy) in high-temperature hot rolling, low automation degree of the existing process, easy leakage of protective atmosphere and inability to realize batch continuous production. The system comprises a two-roller reversible hot rolling mill, a sealed conveying module (containing two plate chain conveying mechanisms sealed in a glove box), a heating module (a preheating furnace and two temperature compensation furnaces), a processing and collecting module (punching equipment and a material collecting container) and a whole sealing cover, and linkage sealing doors are arranged at the interfaces of the modules. The method realizes the whole-process oxygen-isolated production by establishing a protective atmosphere through inert gas replacement, batch heating, reciprocating rolling and temperature compensation and finished product processing and collecting. The application realizes the automatic batch rolling of anaerobic special alloy, guarantees the non-oxidation quality and improves the production efficiency and reliability.

Description

Technical Field

[0001] This invention relates to the field of metal material rolling technology, and in particular to a system and method for mass production of anaerobic special alloys in an oxygen-isolated hot rolling process. Background Technology

[0002] Anaerobic specialty alloys (such as certain nickel-based, cobalt-based, and titanium-based superalloys) are highly susceptible to oxidation at high temperatures, and traditional hot rolling processes cannot meet the requirements for oxidation-free production. Existing technologies either employ a cumbersome process of surface coating followed by rolling and then removing the coating, or use a simple sealed hood with a protective gas supply. These methods suffer from common problems such as low automation, easy leakage of the protective atmosphere, inaccurate temperature control, and inability to achieve continuous batch production. Therefore, there is an urgent need to develop a highly reliable hot rolling system that can achieve full-process oxygen isolation, automation, and continuous batch production. Summary of the Invention

[0003] The purpose of this invention is to provide a system and method for mass production of anaerobic special alloys in an oxygen-isolated hot rolling process. This invention aims to solve the technical problems of easy oxidation of anaerobic special alloys during high-temperature hot rolling, the inability of existing processes to achieve automated mass production, and the easy leakage of protective atmosphere, thereby ensuring product quality and improving production efficiency.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a batch oxygen-isolated hot rolling system for anaerobic special alloys, comprising:

[0005] Rolling core unit;

[0006] The sealed conveying unit includes two sealed conveying mechanisms located on the inlet side and the outlet side of the rolling core unit, respectively;

[0007] The heating and temperature management unit includes a main heating furnace and at least one intermittent holding furnace;

[0008] The finished product processing unit is located at the end of the closed conveyor mechanism on the outlet side;

[0009] An overall atmosphere isolation unit that covers the rolling core unit and the finished product processing unit;

[0010] The linkage atmosphere locking system includes multiple sets of automatic sealing door groups installed at the connection interfaces of each unit. The automatic sealing door groups are configured to open and close synchronously during material transfer to maintain atmosphere isolation inside each unit.

[0011] The main heating furnace, intermittent holding furnace, and rolling core unit are arranged along the main material flow direction, and each unit is connected to an inert gas supply source.

[0012] In some embodiments, the enclosed conveying mechanism is a plate chain conveying mechanism integrally disposed within a glove box, and the glove box wall panel includes a high-temperature resistant transparent observation section.

[0013] In some embodiments, the plate chain conveyor is provided with a guide device and a feeding device near the roll gap of the rolling core unit;

[0014] The guide device is used to center and align the rolled piece before it enters the roll gap, and the feeding device is used to apply a stable pushing force to the rolled piece so that it is fed into the roll gap.

[0015] In some embodiments, the main heating furnace is provided with a first continuous conveying mechanism whose conveying direction is consistent with the material outflow direction; the intermittent holding furnace is provided with a second stepping conveying mechanism whose conveying direction is perpendicular to the material inflow and outflow direction, and the intermittent holding furnace is also provided with a pushing mechanism for material transfer.

[0016] The pushing mechanism includes a feeding and pushing module that pushes the rolled piece into the intermittent holding furnace and a discharging and pushing module that pushes the rolled piece out of the intermittent holding furnace.

[0017] In some embodiments, the core rolling unit is a two-roll reversible hot rolling mill.

[0018] In some embodiments, the finished product processing unit includes a punching device and a collection container arranged in sequence.

[0019] In some embodiments, the anaerobic special alloy mass production oxygen-isolated hot rolling system further includes an online thickness detection device located at the inlet and / or outlet side of the rolling core unit for real-time measurement of the workpiece thickness.

[0020] In some embodiments, the main heating furnace is a preheating furnace, and the intermittent holding furnace consists of two supplementary heating furnaces, which are located at the inlet and outlet sides of the rolling core unit, respectively.

[0021] This invention also provides a method for batch hot rolling of anaerobic special alloys using the oxygen-isolated hot rolling system for batch production of anaerobic special alloys as described above, comprising the following steps:

[0022] Establish an inert atmosphere throughout the entire process;

[0023] The batch of rolled pieces are heated in the main heating furnace;

[0024] The heated workpiece is subjected to reciprocating rolling and intermittent heat preservation between the rolling core unit and the intermittent holding furnace;

[0025] The rolled piece is protected by an inert atmosphere in all processes, and the transfer between different units is achieved through the synchronous operation of the corresponding sealing door group in the linkage atmosphere locking system.

[0026] The rolled finished products are transported to the finished product processing unit for shaping and collection.

[0027] In some embodiments, the reciprocating rolling and intermittent heat preservation steps include: the rolled piece can enter the corresponding intermittent heat preservation furnace for heat replenishment via a conveying mechanism on the inlet or outlet side, and undergo multi-pass reversible rolling.

[0028] Compared with the prior art, the anaerobic special alloy mass production oxygen-isolated hot rolling system of the present invention has at least the following beneficial effects:

[0029] Complete oxygen isolation throughout the process: Through a multi-seal design of "glove box + sealing cover + linkage sealing door", a complete anaerobic environment is constructed from heating, conveying, rolling, heat replenishment to stamping and collection, which completely solves the problem of hot rolling oxidation of anaerobic special alloys.

[0030] Highly efficient batch and automated production: The modular design allows the preheating furnace to heat in batches and the reheating furnace to alternately maintain the temperature. Combined with plate chain conveyor and linkage control, it realizes uninterrupted continuous and automated production, which greatly improves production efficiency.

[0031] Precise temperature control: A dedicated temperature compensation furnace is set up to compensate for the temperature of the rolled parts between passes, which effectively controls the final rolling temperature of the rolled parts and ensures the uniformity and stability of product performance.

[0032] Highly flexible and adaptable: The reversible rolling process, combined with the heating furnaces on both sides, allows for flexible process routes, adapting to the rolling requirements of products of different materials and specifications. The system is particularly suitable for the precision rolling of small-sized, easily oxidized alloys.

[0033] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of an anaerobic special alloy mass production oxygen-isolated hot rolling system provided in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the sealed conveying unit of the anaerobic special alloy mass production oxygen-isolated hot rolling system provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the heating furnace in the anaerobic special alloy mass production oxygen-isolated hot rolling system provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Two-roll reversible hot rolling mill; 2. Plate chain conveyor mechanism; 21. Guide device; 22. Feeding device; 23. Glove box; 3. Preheating furnace; 4. Compensation furnace; 41. Feeding and pushing module; 42. Discharge and pushing module; 5. Punching equipment; 6. Collection container; 7. Online thickness detection device; 8. Rolled workpiece; 9. Sealing cover. Detailed Implementation

[0040] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0041] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] like Figures 1-3 As shown, this embodiment of the invention provides a batch oxygen-isolated hot rolling system for anaerobic special alloys, comprising:

[0044] Rolling core unit;

[0045] The sealed conveying unit includes two sealed conveying mechanisms located on the inlet side and the outlet side of the rolling core unit, respectively;

[0046] The heating and temperature management unit includes a main heating furnace and at least one intermittent holding furnace;

[0047] The finished product processing unit is located at the end of the closed conveyor mechanism on the outlet side;

[0048] An overall atmosphere isolation unit that covers the rolling core unit and the finished product processing unit;

[0049] The linkage atmosphere locking system includes multiple sets of automatic sealing door groups installed at the connection interfaces of each unit. The automatic sealing door groups are configured to open and close synchronously during material transfer to maintain atmosphere isolation inside each unit.

[0050] The main heating furnace, intermittent holding furnace, and rolling core unit are arranged along the main material flow direction, and each unit is connected to an inert gas supply source.

[0051] In this embodiment, the anaerobic special alloy batch oxygen-isolated hot rolling system includes a rolling core unit, a sealed conveying unit, a heating and temperature management unit, a finished product processing unit, an overall atmosphere isolation unit, and a linkage atmosphere locking system. Each unit is connected to an inert gas supply source, and the main heating furnace, intermittent holding furnace, and rolling core unit are arranged along the main material flow direction.

[0052] The rolling core unit is a two-roll reversible hot rolling mill 1, which is responsible for rolling the workpiece 8. The sealed conveying unit includes two sealed conveying mechanisms located at the inlet and outlet sides of the two-roll reversible hot rolling mill 1, specifically a left plate chain conveying mechanism 2 with a glove box 23 and a right plate chain conveying mechanism 2 with a glove box 23, which are responsible for the sealed conveying of the workpiece 8 between the units. The heating and temperature management unit includes a preheating furnace 3 as the main heating furnace and a left supplementary heating furnace 4 and a right supplementary heating furnace 4 as intermittent holding furnaces, which realize the preheating of the workpiece 8 and the temperature supplementation during the rolling process. The finished product processing unit is located at the end of the sealed conveying mechanism on the outlet side, and consists of a punching device 5 and a collection container 6, which completes the shaping and collection of the workpiece 8. The overall atmosphere isolation unit is a sealing cover 9, which covers the two-roll reversible hot rolling mill 1 and the finished product processing unit to maintain an inert atmosphere environment. The linkage atmosphere locking system consists of multiple sets of automatic sealing door groups set at the connection interface of each unit to ensure that the atmosphere of each unit does not leak during material transfer.

[0053] During operation, all openable and closable doors in the left plate chain conveyor 2 with glove box 23, the right plate chain conveyor 2 with glove box 23, the preheating furnace 3, the left supplementary heating furnace 4, the right supplementary heating furnace 4, and the sealing cover 9 are first closed. Inert gas is introduced through the inert gas inlet device on each unit to replace the internal air and establish a fully inert atmosphere environment, completely isolating oxygen. Subsequently, batches of rolled pieces 8 are manually fed into the feed port of the preheating furnace 3. The preheating furnace 3 is equipped with a first continuous conveying mechanism (preheating furnace plate chain conveyor mechanism), whose conveying direction is consistent with the material outflow direction, driving the rolled pieces 8 to be heated evenly in the furnace. Moreover, the preheating furnace 3 is relatively long in the material conveying direction, which can heat multiple rolled pieces 8 at one time, while ensuring that each rolled piece 8 on the plate chain is spaced at a certain distance to avoid uneven heating. After the rolled piece 8 is heated, the discharge door of the preheating furnace 3 and the automatic sealing door of its corresponding left plate chain conveyor 2 with glove box 23 open synchronously. The preheating furnace plate chain conveyor sends the rolled piece 8 onto the left plate chain conveyor 2 with glove box 23. Then the door closes to maintain an inert atmosphere. The left plate chain conveyor 2 with glove box 23 conveys the rolled piece 8 to the inlet of the two-roll reversible hot rolling mill 1. The automatic sealing door of the sealing cover 9, which is connected to the left plate chain conveyor 2 with glove box 23, opens, and the rolled piece 8 enters the two-roll reversible hot rolling mill 1 for rolling. If the temperature of the rolled piece 8 drops after rolling, it needs to be reheated. It is conveyed by the right plate chain conveyor 2 with glove box 23 to the feed inlet of the right reheating furnace 4. The feed door of the right reheating furnace 4 and the automatic sealing door of its corresponding right plate chain conveyor 2 with glove box 23 open synchronously. The feeding and pushing module pushes the rolled piece 8 into the furnace. After the door closes, the reheating begins. After the reheating is completed, the discharge furnace door of the right reheating furnace 4 and the corresponding automatic sealing door open synchronously. The discharge pushing module pushes the rolled piece 8 onto the right plate chain conveyor mechanism 2 with glove box 23, and then sends it back to the two-roll reversible hot rolling mill 1 for further rolling. After all rolling passes are completed, the rolled piece 8 is sent to the punching equipment 5 by the right plate chain conveyor mechanism 2 with glove box 23. The punching equipment 5 punches the rolled piece 8 into a round cake of a specific size. The round cake automatically falls into the collection container 6. When the collection container 6 is full, it is pushed away manually. At the same time, the above process is repeated to produce the next batch of rolled pieces 8. This system effectively solves the problem of easy oxidation of anaerobic special alloys during high-temperature hot rolling by using an inert atmosphere protection throughout the entire process and automated conveying, rolling, reheating, and processing links. It realizes automated mass production, greatly improves production efficiency and product quality stability, and meets the needs of mass production of anaerobic special alloys.

[0054] The anaerobic special alloys include, but are not limited to, high-temperature alloys such as nickel-based, cobalt-based, and titanium-based alloys, which are extremely prone to oxidation at high temperatures and require complete isolation from oxygen.

[0055] The sealing cover 9 is divided into two parts, which respectively cover the rolling core unit and the finished product processing unit, ensuring that the atmosphere in each area is independent and controllable.

[0056] In some embodiments, the enclosed conveying mechanism is a plate chain conveying mechanism 2 integrally disposed within the glove box 23, and the wall panel of the glove box 23 includes a high-temperature resistant transparent observation section.

[0057] In this embodiment, the enclosed conveying mechanism is a plate chain conveyor 2 integrally housed within the glove box 23. The glove box 23 adopts a metal frame shell structure, with the outer shell filled with high-temperature resistant explosion-proof glass and sealed to form a high-temperature resistant transparent observation section. Workers can monitor the conveying status of the rolled piece 8 in real time through this transparent observation section. The glove box 23 isolates the area from the outside world from the ground level to the top of the plate chain conveyor 2, providing excellent airtightness. An inert gas inlet device is installed on the glove box 23 to introduce inert gas during operation to prevent oxidation of the rolled piece 8. Simultaneously, a conveniently opening and closing hatch is provided above the plate chain in the glove box 23 for emergency handling and maintenance. Automatic sealing doors are installed at the junctions of the glove box 23 with the preheating furnace 3, left supplementary heating furnace 4, right supplementary heating furnace 4, two-roll reversible hot rolling mill 1, and punching equipment 5 to ensure no atmosphere leakage at the junctions of each unit.

[0058] During operation, the glove box 23 continuously supplies inert gas through an inert gas inlet device to maintain an inert atmosphere and prevent the rolled piece 8 from coming into contact with oxygen during transport. Once the rolled piece 8 in the preheating furnace 3 has finished heating, the discharge furnace door of the preheating furnace 3 and the corresponding automatic sealing door of the glove box 23 open synchronously. The preheating furnace plate chain conveyor then delivers the rolled piece 8 to the plate chain conveyor 2, and the door closes to prevent inert gas leakage. Driven by a motor, the plate chain conveyor 2 transports the rolled piece 8 smoothly to the target position at a certain speed, either forward or reverse. For example, it can transport the rolled piece 8 to be rolled in a two-roll reversible hot rolling mill 1, or to a reheating furnace 4, or to a punching machine 5. During transport, workers can check the alignment and for any jamming of the rolled piece 8 in real time through the high-temperature resistant transparent observation section of the glove box 23. If any problems are found, they can be addressed promptly through the gate. When the rolled piece 8 needs to be transferred between different units, the glove box 23 and the automatic sealing door of the corresponding unit open and close synchronously to ensure that the rolled piece 8 is always under the protection of an inert atmosphere and avoids contact with air during the transfer process. This structure can not only reliably isolate oxygen, but also realize the automated conveying and status monitoring of the rolled piece 8, while taking into account the convenience of emergency response and maintenance. It is suitable for conveying small-sized and various-sized rolled pieces 8, and provides a guarantee for the entire process of oxidation-free production.

[0059] The plate chain conveyor mechanism is suitable for various sizes of rolled products, especially for the automated conveying of small-sized rolled products.

[0060] In some embodiments, the plate chain conveyor 2 is provided with a guide device 21 and a feeding device 22 adjacent to the roll gap of the rolling core unit;

[0061] Among them, the guide device 21 is used to center and align the rolled piece 8 before it enters the roll gap, and the feeding device 22 is used to apply a stable pushing force to the rolled piece 8 so that the rolled piece 8 is fed into the roll gap.

[0062] In this embodiment, the plate chain conveyor 2 is equipped with a guide device 21 and a feeding device 22 near the roll gap of the core rolling unit (two-roll reversible hot rolling mill 1). The guide device 21 is used to center and align the workpiece 8 before it enters the roll gap during rolling, ensuring that the workpiece 8 is accurately aligned with the roll gap and avoiding rolling deviation or equipment damage due to workpiece 8 offset. The feeding device 22 is used because the transmission components of the plate chain conveyor 2 are limited in size, and there is a certain distance between the plate chain and the roll gap, so direct transmission is not possible. The feeding device 22 applies a stable pushing force to the workpiece 8, so that the workpiece 8 can be smoothly fed into the roll gap, which is especially suitable for conveying small-sized workpieces 8.

[0063] During operation, when the plate chain conveyor 2 transports the rolled piece 8 to the vicinity of the entrance of the two-roll reversible hot rolling mill 1, it first sends the rolled piece 8 to the guide device 21. The guide device 21 is activated and precisely centers and aligns the rolled piece 8, adjusting its position so that its centerline is aligned with the roll gap centerline. After alignment, the feeding device 22 is activated, applying a pushing force along the conveying direction to the rolled piece 8, smoothly pushing it into the roll gap of the two-roll reversible hot rolling mill 1, ensuring that the rolled piece 8 smoothly enters the rolling stage. If the rolled piece 8 needs to undergo reciprocating rolling, for example, after the first forward rolling, it is returned to the two-roll reversible hot rolling mill 1 for reverse rolling after reheating, the plate chain conveyor 2 sends the reheated rolled piece 8 back to the guide device 21. The guide device 21 repeats the centering and alignment action, and the feeding device 22 applies a pushing force again to push the rolled piece 8 into the roll gap, ensuring that the rolled piece 8 is accurately positioned before each rolling pass. The centering function of the guide device 21 greatly improves the rolling accuracy and reduces the scrap rate; the feeding device 22 effectively solves the transmission gap problem between the plate chain and the roll gap, ensuring that all sizes of rolled pieces 8 can be rolled smoothly. Combined with the automated transmission of the plate chain conveyor mechanism 2, it further improves the automation level of the overall process, reduces manual intervention, and ensures production continuity.

[0064] In some embodiments, the main heating furnace is provided with a first continuous conveying mechanism whose conveying direction is consistent with the material outflow direction; the intermittent holding furnace is provided with a second stepping conveying mechanism whose conveying direction is perpendicular to the material inflow and outflow direction, and the intermittent holding furnace is also provided with a pushing mechanism for material transfer.

[0065] The pushing mechanism includes a feeding and pushing module 41 that pushes the rolled piece 8 into the intermittent holding furnace and a discharging and pushing module 42 that pushes the rolled piece 8 out of the intermittent holding furnace.

[0066] In this embodiment, the main heating furnace (preheating furnace 3) is equipped with a first continuous conveying mechanism (preheating furnace plate chain conveying mechanism), whose conveying direction is consistent with the material outflow direction. This mechanism is not only used to store the rolled pieces 8 during heating, but also to drive the rolled pieces 8 to move during material feeding and discharging, ensuring that the rolled pieces 8 are heated evenly in the furnace. Moreover, the preheating furnace 3 has a long dimension in the material conveying direction, which can heat multiple rolled pieces 8 at one time to meet the needs of batch production. The intermittent holding furnace (left supplementary heating furnace 4, right supplementary heating furnace 4) is equipped with a second step conveying mechanism (supplementary heating furnace plate chain conveying mechanism), whose conveying direction is perpendicular to the material feeding and discharging direction. It is used to store the rolled pieces 8 during heating and can transport batches of rolled pieces 8 one by one to the discharge waiting position to ensure uniform and orderly supplementary heating. At the same time, both the left supplementary heating furnace 4 and the right supplementary heating furnace 4 are equipped with a pushing mechanism for material transfer. The pushing mechanism includes a feeding pushing module 41 and a discharging pushing module 42, which are responsible for pushing the rolled pieces 8 into the furnace and pushing the rolled pieces 8 out of the furnace, respectively.

[0067] During operation, after the batch of rolled pieces 8 are fed into the feed inlet of the preheating furnace 3, the preheating furnace plate chain conveyor mechanism starts, driving the rolled pieces 8 to move along the material flow direction, so that the rolled pieces 8 are heated evenly in the furnace, and each rolled piece 8 is spaced at a certain distance to avoid uneven heating. After the rolled pieces 8 are heated, the preheating furnace plate chain conveyor mechanism transports the rolled pieces 8 to the discharge port of the preheating furnace 3. With the synchronous opening and closing of the discharge furnace door of the preheating furnace 3 and the automatic sealing door of the glove box 23, the rolled pieces 8 are sent to the plate chain conveyor mechanism 2. When the temperature of the rolled piece 8 drops after rolling and requires reheating, taking the right reheating furnace 4 as an example, the right plate chain conveyor 2 with glove box 23 sends the rolled piece 8 to the feed port of the right reheating furnace 4. The feed furnace door and the corresponding automatic sealing door of the right reheating furnace 4 open, and the feeding and pushing module 41 pushes the rolled piece 8 into the furnace. The reheating furnace plate chain conveyor starts, driving the rolled piece 8 to move in a direction perpendicular to the material inlet and outlet direction, sending the rolled piece 8 to a suitable position in the furnace for storage and heat preservation. At the same time, batches of rolled pieces 8 can be conveyed one by one to the discharge waiting position to ensure that each rolled piece 8 can be fully reheated. After the reheating is completed, the reheating furnace plate chain conveyor sends the rolled piece 8 to the discharge waiting position. The discharge pushing module 42 starts, pushing the rolled piece 8 from the furnace onto the right plate chain conveyor 2 with glove box 23, and then sending it back to the two-roll reversible hot rolling mill 1 for further rolling. The operation of the left reheating furnace 4 is the same as that of the right reheating furnace 4, and it only serves the rolled pieces 8 that need reheating after being rolled in reverse from the two-roll reversible hot rolling mill 1. This structure, through precise conveying and pushing design, realizes batch heating and orderly reheating of the rolled pieces 8, reduces temperature loss, avoids oxidation, and ensures rolling quality and production efficiency.

[0068] In some embodiments, the core rolling unit is a two-roll reversible hot rolling mill 1.

[0069] In this embodiment, the core rolling unit is a two-roll reversible hot rolling mill 1. This equipment can realize forward and reverse rolling. In conjunction with a sealed conveying unit, a heating and temperature management unit, and an overall atmosphere isolation unit, it completes the multi-pass rolling process of the workpiece 8. The two-roll reversible hot rolling mill 1 is covered by an overall atmosphere isolation unit (sealing cover 9). The sealing cover 9 is a metal frame shell structure. The outer shell is filled with high-temperature resistant explosion-proof glass and sealed, which has good airtightness. The sealing cover 9 is equipped with an inert gas inlet device. Inert gas is introduced during operation to ensure that the rolling process is always in an inert atmosphere environment and isolating oxygen.

[0070] During operation, when the left plate chain conveyor 2 with glove box 23 delivers the workpiece 8 to the inlet of the two-roll reversible hot rolling mill 1, after being aligned by the guide device 21 and pushed into the roll gap by the feeding device 22, the two-roll reversible hot rolling mill 1 starts and performs forward rolling (from left to right) on the workpiece 8 according to the preset rolling parameters. After the first rolling is completed, the workpiece 8 is conveyed by the right plate chain conveyor 2 with glove box 23 to the right reheating furnace 4 for reheating. After reheating, it is sent back to the two-roll reversible hot rolling mill 1 by the right plate chain conveyor 2 with glove box 23. At this time, the two-roll reversible hot rolling mill 1 switches to reverse operation and performs reverse rolling (from right to left) on the workpiece 8. During the reciprocating rolling process, inert gas is continuously introduced into the sealing cover 9 to maintain an oxygen-free environment. Simultaneously, online thickness detection devices 7, located on both sides of the two-roll reversible hot rolling mill 1, measure the thickness of the rolled piece 8 in real time and feed the data back to the control system. The control system adjusts rolling parameters such as the roll gap of the two-roll reversible hot rolling mill 1 based on the measurement results to ensure that the thickness of the rolled piece 8 meets the requirements after each pass. After the rolled piece 8 completes the preset number of passes, the last pass is rolled in the forward direction so that the rolled piece 8 can be smoothly conveyed to the right-side chain conveyor mechanism 2 with glove box 23, and then enter the finished product processing unit. The reversible function of the two-roll reversible hot rolling mill 1 simplifies the multi-pass rolling process, eliminating the need for frequent adjustments to the conveying direction of the rolled piece 8. Combined with inert atmosphere protection and real-time thickness monitoring, it significantly improves rolling accuracy and efficiency, ensuring the performance and quality of the anaerobic special alloy.

[0071] In some embodiments, the finished product processing unit includes a punching device 5 and a collection container 6 arranged in sequence.

[0072] In this embodiment, the finished product processing unit includes a punching device 5 and a collection container 6 arranged sequentially. The punching device 5 is a hydraulic pressing structure with stable punching force, which can accurately punch the hot rolled material into round cakes of a specific size, avoiding the efficiency reduction and performance damage caused by reprocessing the rolled piece 8 after cooling. The collection container 6 is a frame structure with wheels installed at the bottom for easy manual movement, used to collect the punched round cakes and ensure that the finished product collection process is uninterrupted. The finished product processing unit is also covered by an overall atmosphere isolation unit (sealing cover 9). An automatic sealing door is set at the part where the sealing cover docks with the right plate chain conveyor mechanism 2 with glove box 23. Inert gas is introduced during operation to prevent the round cakes from oxidizing during the collection process.

[0073] During operation, the rolled piece 8, having completed all rolling passes, is conveyed to the platform of the punching equipment 5 by the right-side chain conveyor 2 with glove box 23. During this process, the automatic sealing door at the interface between the right-side chain conveyor 2 with glove box 23 and the punching equipment 5 opens synchronously, ensuring that the rolled piece 8 enters the punching equipment 5 under an inert atmosphere, preventing contact with oxygen during cooling. The punching equipment 5 starts according to preset dimensional parameters and uses hydraulic pressure to punch the hot rolled piece 8 into a round disc of a specific size. After punching, the disc automatically falls into the collection container 6 located on the right side of the punching equipment 5 under gravity. As the discs are continuously collected, when the collection container 6 reaches a preset capacity, the operator can easily push it to the subsequent processing area using the wheels at the bottom of the collection container 6, while simultaneously replacing the empty collection container 6, ensuring that the finished product collection process does not affect the punching and conveying of subsequent rolled pieces 8. This unit improves the efficiency and quality of finished product processing through hot punching and convenient collection design. Combined with inert atmosphere protection, it further ensures the performance of round cake materials and is suitable for the needs of continuous processing of finished products in mass production.

[0074] In some embodiments, the anaerobic special alloy mass production oxygen-isolated hot rolling system further includes an online thickness detection device 7 disposed on the inlet side and / or outlet side of the rolling core unit for real-time measurement of the thickness of the rolled piece 8.

[0075] In this embodiment, the system also includes an online thickness detection device 7 installed on the inlet and / or outlet side of the rolling core unit (two-roll reversible hot rolling mill 1). The online thickness detection device 7 is a laser thickness gauge with high-precision measurement capabilities. It can automatically move forward and backward, with the movement direction perpendicular to the direction of the plate chain conveyor 2. When detection is required, it moves to the detection position and returns after detection, without affecting the normal conveying and rolling process of the workpiece 8. The online thickness detection device 7 is connected to the control system and can feed the measurement data back to the control system in real time, providing a basis for adjusting rolling parameters.

[0076] During operation, before the workpiece 8 enters the two-roll reversible hot rolling mill 1 for rolling, if an online thickness detection device 7 is installed on the inlet side, the device will automatically move to the detection position (moving direction perpendicular to the direction of the plate chain conveyor 2) to perform laser measurement on the thickness of the workpiece 8 about to enter the roll gap, and the measurement data will be fed back to the control system in real time. The control system, based on the preset rolling target thickness, compares the measurement data on the inlet side and adjusts parameters such as the roll gap size and rolling speed of the two-roll reversible hot rolling mill 1 to ensure that the rolling parameters meet the processing requirements of the current workpiece 8. After the workpiece 8 completes one rolling pass, if an online thickness detection device 7 is installed on the outlet side, the device will automatically move to the detection position to perform laser measurement on the thickness of the just-rolled workpiece 8 again. If the measured thickness meets the preset requirements, the workpiece 8 will enter the subsequent reheating or finished product processing stage; if the thickness does not meet the requirements, the control system will adjust the rolling parameters of the next pass of the two-roll reversible hot rolling mill 1 in a timely manner based on the detection data on the outlet side, or determine whether the current rolling pass needs to be repeated. During the reciprocating rolling process of the rolled piece 8, the online thickness detection device 7 repeats the above detection action each time the rolled piece 8 enters and exits the two-roll reversible hot rolling mill 1, continuously monitoring the thickness change of the rolled piece 8 to ensure that the thickness of the rolled piece 8 after each rolling pass is within the allowable error range. This device, through high-precision real-time detection and parameter feedback adjustment, significantly improves rolling accuracy, reduces the scrap rate caused by thickness deviations, ensures the consistency of product thickness in mass production, and meets the high dimensional accuracy requirements of anaerobic special alloys.

[0077] In some embodiments, the main heating furnace is a preheating furnace 3, and the intermittent holding furnace is two supplementary heating furnaces 4, which are located on the inlet side and the outlet side of the rolling core unit, respectively.

[0078] The discharge port is located on the side closer to the rolling mill to reduce the temperature drop of the rolled product after it exits the furnace.

[0079] In this embodiment, the main heating furnace is a preheating furnace 3, and the intermittent holding furnace consists of two supplementary heating furnaces 4. The two supplementary heating furnaces 4 are located on the inlet side and outlet side of the rolling core unit (two-roll reversible hot rolling mill 1), respectively, forming an inlet-side supplementary heating furnace 4 (left supplementary heating furnace 4) and an outlet-side supplementary heating furnace 4 (right supplementary heating furnace 4). The feed inlet and discharge outlet of the left supplementary heating furnace 4 and the right supplementary heating furnace 4 are both located on the side close to the corresponding plate chain conveyor 2, with the discharge outlet located on the side closer to the two-roll reversible hot rolling mill 1, to ensure that the temperature drop of the material plate is small during rolling after exiting the furnace. The preheating furnace 3, the left supplementary heating furnace 4, the right supplementary heating furnace 4 and the two-roll reversible hot rolling mill 1 are reasonably arranged along the main material flow direction. Each furnace body has good airtightness, and each furnace body is equipped with an inert gas inlet device to introduce inert gas during operation to prevent oxidation of the rolled workpiece 8.

[0080] During operation, firstly, all openable and closable doors of the preheating furnace 3, left supplementary heating furnace 4, right supplementary heating furnace 4, and corresponding plate chain conveyor mechanism 2 and sealing cover are closed, and inert gas is introduced to establish an inert atmosphere throughout the process. A batch of workpieces 8 to be rolled are manually fed into the feed port of the preheating furnace 3. The plate chain conveyor mechanism inside the preheating furnace 3 drives the workpieces 8 to move and heat them evenly, heating multiple workpieces 8 at once. After heating, the workpieces 8 are sent to the left plate chain conveyor mechanism 2 with glove box 23, and then enter the two-roll reversible hot rolling mill 1 for forward rolling. After rolling, the temperature of the workpieces 8 drops, and they are sent by the right plate chain conveyor mechanism 2 with glove box 23 to the right supplementary heating furnace 4 on the exit side. The feed furnace door and corresponding automatic sealing door of the right supplementary heating furnace 4 are opened, and the workpieces 8 enter the furnace for supplementary heating. After supplementary heating, they are sent out to the right plate chain conveyor mechanism 2 with glove box 23 and returned to the two-roll reversible hot rolling mill 1 for reverse rolling. After reverse rolling, if the rolled piece 8 still requires reheating, it is conveyed by the left plate chain conveyor 2 with glove box 23 to the left reheating furnace 4 on the inlet side. The left reheating furnace 4 repeats the reheating process, and after reheating, it is sent back to the two-roll reversible hot rolling mill 1 for forward rolling. This process is repeated until the rolled piece 8 reaches the preset thickness. The two reheating furnaces 4 serve the reheating of rolled pieces 8 after different rolling directions, eliminating the need for long-distance transport of rolled pieces 8, significantly reducing temperature drop, and ensuring that rolled pieces 8 are always rolled within the optimal temperature range. At the same time, they can handle the reheating operations of different rolled pieces 8 simultaneously, improving reheating efficiency. Combined with the batch heating capacity of the preheating furnace 3, this further enhances the system's batch production performance.

[0081] This invention also provides a method for batch hot rolling of anaerobic special alloys using the oxygen-isolated hot rolling system described above, comprising the following steps:

[0082] Establish an inert atmosphere throughout the entire process;

[0083] The batch of rolled pieces 8 are heated in the main heating furnace;

[0084] The heated rolled piece 8 is subjected to reciprocating rolling and intermittent heat preservation between the rolling core unit and the intermittent heat preservation furnace;

[0085] The rolled piece 8 is protected by an inert atmosphere in all processes, and the transfer between different units is achieved through the synchronous operation of the corresponding sealing door group in the linkage atmosphere locking system.

[0086] The rolled finished products are transported to the finished product processing unit for shaping and collection.

[0087] In this embodiment, the method is implemented based on the above-mentioned anaerobic special alloy batch oxygen-isolated hot rolling system. The specific steps include establishing an inert atmosphere environment throughout the process, heating the batch rolled pieces 8, reciprocating rolling and intermittent heat preservation, and finished product shaping and collection. The rolled pieces 8 are under inert atmosphere protection in all processes. The transfer between different units is achieved through the synchronous operation of the corresponding sealing gate group in the linkage atmosphere locking system to ensure that the atmosphere does not leak.

[0088] During operation, the first step is to establish an inert atmosphere environment throughout the entire process. All openable and closable doors of the system, including the left and right plate chain conveyors 2 with glove boxes 23, the preheating furnace 3, the left and right supplementary heating furnaces 4, and the sealing covers, are closed. Inert gas is introduced through the inert gas inlet devices of each unit to replace the internal air, ensuring that the interior of each unit and connecting channels is filled with inert gas and free of oxygen residue. The second step is to heat the batch of rolled pieces 8. The batch of rolled pieces 8 are manually fed into the feed port of the preheating furnace 3. The preheating furnace plate chain conveyor in the preheating furnace 3 moves the rolled pieces 8, simultaneously heating them evenly. During heating, the furnace body is kept airtight to prevent inert gas leakage and oxygen entry, and each rolled piece 8 is spaced a certain distance apart to avoid uneven heating. The third step involves reciprocating rolling and intermittent heat preservation. After the workpiece 8 is heated, the discharge door of the preheating furnace 3 and the automatic sealing door of the left plate chain conveyor mechanism 2 with glove box 23 open simultaneously. The workpiece 8 is then fed to the left plate chain conveyor mechanism 2 with glove box 23. After the door closes, the left plate chain conveyor mechanism 2 with glove box 23 conveys the workpiece 8 to the inlet of the two-roll reversible hot rolling mill 1. The automatic sealing door, which is connected to the sealing cover of the left plate chain conveyor mechanism 2 with glove box 23, opens, and the workpiece 8 enters the two-roll reversible hot rolling mill 1 for forward rolling. After rolling, the workpiece 8 is sent to the right reheating furnace 4 by the right plate chain conveyor mechanism 2 with glove box 23. The feed furnace door and the corresponding automatic sealing door of the right reheating furnace 4 open, and the workpiece 8 enters the furnace for reheating. After reheating, it is sent out to the right plate chain conveyor mechanism 2 with glove box 23 and returned to the two-roll reversible hot rolling mill 1 for reverse rolling. This process is repeated until the workpiece 8 reaches the preset thickness. The fourth step is finished product shaping and collection. After rolling, the final forward-rolled workpiece 8 is conveyed to the punching equipment 5 by the right-side chain conveyor 2 with glove box 23. The punching equipment 5 punches the workpiece 8 into a round cake of a specific size. The round cake automatically falls into the collection container 6. When the collection container 6 is full, it is pushed away manually. At the same time, the above steps are repeated to produce the next batch of workpieces 8. This method completely solves the oxidation problem of anaerobic special alloys through full-process inertial protection and automation and batch operation, which greatly improves production efficiency and product quality and meets the needs of large-scale production.

[0089] In some embodiments, the reciprocating rolling and intermittent heat preservation steps include: the rolled piece 8 can enter the corresponding intermittent heat preservation furnace for heat replenishment via the conveying mechanism on the inlet side or outlet side, and undergo multi-pass reversible rolling.

[0090] In this embodiment, during the reciprocating rolling and intermittent heat preservation steps, the rolled piece 8 can enter the corresponding left heat preservation furnace 4 via the left plate chain conveyor 2 with glove box 23 on the inlet side, or enter the corresponding right heat preservation furnace 4 via the right plate chain conveyor 2 with glove box 23 on the outlet side for heat preservation. This, in conjunction with the two-roll reversible hot rolling mill 1, enables multi-pass reversible rolling, ensuring that the rolled piece 8 is in the optimal temperature state before each rolling pass, thus guaranteeing the rolling quality.

[0091] During operation, after the rolled piece 8 is heated by the preheating furnace 3, it is conveyed to the two-roll reversible hot rolling mill 1 by the left plate chain conveyor 2 with glove box 23 for the first forward rolling (from left to right). After the first rolling, the temperature of the rolled piece 8 decreases. If the right supplementary heating furnace 4 is idle at this time, the right plate chain conveyor 2 with glove box 23 conveys the rolled piece 8 to the feed port of the right supplementary heating furnace 4. The feed furnace door of the right supplementary heating furnace 4 and the corresponding automatic sealing door open synchronously. The feeding push module 41 pushes the rolled piece 8 into the furnace. The supplementary heating furnace plate chain conveyor drives the rolled piece 8 to be uniformly heated in the furnace. After the supplementary heating is completed, the discharge push module 42 pushes the rolled piece 8 onto the right plate chain conveyor 2 with glove box 23. The right plate chain conveyor 2 with glove box 23 sends the rolled piece 8 back to the two-roll reversible hot rolling mill 1. The two-roll reversible hot rolling mill 1 switches to reverse operation to perform a second reverse rolling (from right to left) on the rolled piece 8. After the second rolling, if the rolled piece 8 still needs reheating and the left reheating furnace 4 is idle, the left plate chain conveyor 2 with glove box 23 sends the rolled piece 8 to the left reheating furnace 4. The feed furnace door and the corresponding automatic sealing door of the left reheating furnace 4 are opened, and the rolled piece 8 enters the furnace for reheating. After reheating, it is pushed out by the discharge pusher module 42 to the left plate chain conveyor 2 with glove box 23, and then sent back to the two-roll reversible hot rolling mill 1 for the third forward rolling (from left to right). Depending on the required rolling passes of the rolled piece 8, the left reheating furnace 4 or the right reheating furnace 4 is selected in this cyclical manner for reheating. After each reheating, a reversible rolling is performed until the thickness of the rolled piece 8 reaches the preset requirement. The last pass is ensured to be forward rolling so that the rolled piece 8 can be smoothly sent to the finished product processing unit through the right plate chain conveyor 2 with glove box 23. This step avoids production interruptions caused by a single busy heating furnace 4 by flexibly selecting the combination of heating furnace 4 and reversible rolling, reduces the conveying distance and temperature drop of the rolled piece 8, ensures continuous and efficient rolling, and improves product quality stability, adapting to the mass production of anaerobic special alloys with different thickness requirements.

[0092] The system also includes a central control unit, which is used for automated control and coordinated scheduling of various modules to achieve intelligent production management throughout the entire process.

[0093] The inert gas is argon or nitrogen, with a purity of not less than 99.99%, to ensure the inert effect of the atmosphere.

[0094] The system is also equipped with an emergency exhaust and replenishment system, which is used to quickly restore the protective atmosphere environment in the event of an abnormal atmosphere.

[0095] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0096] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A mass production oxygen-isolated hot rolling system for anaerobic special alloys, characterized in that, include: Rolling core unit; The sealed conveying unit includes two sealed conveying mechanisms located on the inlet side and the outlet side of the rolling core unit, respectively; The heating and temperature management unit includes a main heating furnace and at least one intermittent holding furnace; The finished product processing unit is located at the end of the closed conveyor mechanism on the outlet side; An overall atmosphere isolation unit that covers the rolling core unit and the finished product processing unit; The linkage atmosphere locking system includes multiple sets of automatic sealing door groups installed at the connection interfaces of each unit. The automatic sealing door groups are configured to open and close synchronously during material transfer to maintain atmosphere isolation inside each unit. The main heating furnace, intermittent holding furnace, and rolling core unit are arranged along the main material flow direction, and each unit is connected to an inert gas supply source. The enclosed conveying mechanism is a plate chain conveying mechanism (2) that is integrally set inside the glove box (23). The wall panel of the glove box (23) includes a high-temperature resistant transparent observation section. The plate chain conveyor (2) is provided with a guide device (21) and a feeding device (22) near the roll gap of the rolling core unit. The guide device (21) is used to center and align the rolled piece (8) before it enters the roll gap, and the feeding device (22) is used to apply a stable pushing force to the rolled piece (8) so that the rolled piece (8) is fed into the roll gap. The main heating furnace is equipped with a first continuous conveying mechanism, whose conveying direction is consistent with the material outflow direction; the intermittent holding furnace is equipped with a second step conveying mechanism, whose conveying direction is perpendicular to the material inflow and outflow direction, and the intermittent holding furnace is also equipped with a pushing mechanism for material transfer. The pushing mechanism includes a feeding and pushing module (41) that pushes the rolled piece (8) into the intermittent holding furnace and a discharging and pushing module (42) that pushes the rolled piece (8) out of the intermittent holding furnace. The core rolling unit is a two-roll reversible hot rolling mill (1). The finished product processing unit includes a punching device (5) and a collection container (6) arranged in sequence. The main heating furnace is a preheating furnace (3), and the intermittent heat preservation furnace consists of two supplementary heat preservation furnaces (4), which are located on the inlet side and outlet side of the rolling core unit, respectively.

2. The anaerobic special alloy mass production oxygen-isolated hot rolling system according to claim 1, characterized in that, The anaerobic special alloy mass production oxygen-isolated hot rolling system also includes an online thickness detection device (7) installed on the inlet side and / or outlet side of the rolling core unit for real-time measurement of the thickness of the rolled piece (8).

3. A method for hot rolling using the anaerobic special alloy mass production oxygen-isolated hot rolling system as described in claim 1, characterized in that, Includes the following steps: Establish an inert atmosphere throughout the entire process; The batch of rolled pieces (8) are heated in the main heating furnace; The heated rolled piece (8) is subjected to reciprocating rolling and intermittent heat preservation between the rolling core unit and the intermittent heat preservation furnace; The rolled piece (8) is protected by an inert atmosphere in all processes, and the transfer between different units is achieved through the synchronous operation of the corresponding sealing door group in the linkage atmosphere locking system. The rolled finished products are transported to the finished product processing unit for shaping and collection.

4. The method according to claim 3, characterized in that, The reciprocating rolling and intermittent heat preservation steps include: the rolled piece (8) can enter the corresponding intermittent heat preservation furnace through the conveying mechanism on the inlet side or the outlet side for heat replenishment, and undergo multi-pass reversible rolling.

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