Magnesium alloy cast-rolling and warm-rolling production device

Abstract

The invention relates to the technical field of magnesium alloy cast-rolling and warm-rolling production devices, and provides a magnesium alloy cast-rolling and warm-rolling production device which comprises a cast-rolling device, an annealing device and a warm-rolling device, and magnesium alloy raw materials sequentially pass through the cast-rolling device, the annealing device and the warm-rolling device to be treated; the annealing device comprises a coiling annealing furnace, the coiling annealing furnace comprises a furnace body, and the furnace body is movably connected between the casting and rolling device and the warm rolling device. The magnesium alloy plate coiling mechanism and the coiling annealing furnace are integrated into a whole, the requirement for rapid coil changing during magnesium alloy cast-rolling and warm-rolling can be met, the production efficiency and the automation degree of a magnesium alloy cast-rolling and warm-rolling production line are greatly improved, and a large amount of energy is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnesium alloy casting and warm rolling production equipment, and particularly relates to a magnesium alloy casting and warm rolling production equipment. Background Art

[0002] One of the existing production process routes for magnesium alloy sheets is: casting and rolling + post-treatment after casting and rolling (surface treatment and annealing) + preparation before warm rolling (heating of casting and rolling billets and preheating of rolling rolls) + warm rolling (rough rolling, finish rolling) + post-treatment after warm rolling (cooling, straightening and trimming, surface treatment and inspection).

[0003] The magnesium alloy casting and rolling process is a continuous production process that combines the two processes of casting and rolling using a continuous casting and rolling mill. During the casting and rolling process, first, the magnesium alloy is melted. The magnesium alloy raw material is heated and melted in a furnace, and at the same time, a refining agent is added for refining to remove impurities and gases therein to ensure the purity of the melt. Then comes the casting part. The melted magnesium alloy melt is continuously introduced into the gap between a pair of oppositely rotating rolling rolls through a special device (such as a casting nozzle). These two rolling rolls act as a mold. Under the cooling effect of the rolling rolls, the melt rapidly solidifies and crystallizes to form a casting blank. Next is the rolling in the casting and rolling process. The casting blank just formed by crystallization is immediately rolled under the pressure of the rolling rolls. As the rolling rolls rotate, the thickness of the casting blank gradually decreases, and it is coiled by a coiler to obtain a magnesium alloy casting blank coil with a certain thickness specification.

[0004] The post-treatment after casting and rolling includes surface treatment and annealing treatment. Surface treatment: The surface of the magnesium alloy sheet after casting and rolling may have impurities such as oxide scales and oil stains, and needs to be treated by pickling, alkali washing or mechanical grinding, etc. to obtain a clean surface, which is convenient for good contact between the rolling rolls and the sheet during subsequent warm rolling and ensures the rolling quality. Annealing treatment (uncoiling after cooling, the coil enters and exits the annealing furnace, heating up, holding the temperature, and cooling to complete annealing): The structure of the sheet after casting and rolling may have non-uniformity and residual stress. Annealing can eliminate the residual stress, improve the structural uniformity, enhance the plasticity and toughness of the sheet, and provide a good structural state for warm rolling. The annealing temperature is generally between 300°C and 400°C, and the holding time depends on the sheet thickness and specific alloy composition, usually 1 to 3 hours.

[0005] Preparations before warm rolling include heating and roll preheating. Heating is to heat the annealed magnesium alloy sheet to an appropriate warm rolling temperature range, generally between 150°C and 300°C. Heating methods can include resistance furnaces, induction heating furnaces, etc. During the heating process, it is necessary to ensure that the sheet is evenly heated to avoid local overheating or overcooling. Roll preheating is required before warm rolling to prevent a large temperature difference from occurring when the roll contacts the high-temperature sheet, which may cause the surface temperature of the sheet to drop rapidly, affecting the rolling performance and sheet quality. The roll preheating temperature is generally between 100°C and 200°C, and methods such as electric heating and steam heating can be used.

[0006] The warm rolling process includes rough rolling and finish rolling. Rough rolling: Feed the heated magnesium alloy sheet into the rolling mill for rough rolling. Through multiple passes of rolling, gradually reduce the thickness of the sheet. The reduction per pass is generally controlled between 5% and 15%, and the specific reduction is determined according to factors such as the thickness of the sheet, alloy composition, and equipment capabilities. The purpose of rough rolling is to further improve the structure and properties of the sheet, enhance its plasticity and toughness, and create conditions for subsequent finish rolling. Finish rolling: After the rough-rolled sheet is cooled and reheated, it is subjected to finish rolling. The finish rolling temperature is generally between 100°C and 200°C. The reduction per pass in finish rolling is relatively small, generally between 3% and 8%. The main purpose is to improve the dimensional accuracy, surface quality, and mechanical properties of the sheet to meet the final requirements of the product.

[0007] Post-treatment after warm rolling includes cooling, straightening, trimming, surface treatment, and inspection. Cooling: The warm-rolled magnesium alloy sheet needs to be cooled to fix its structure and properties. Cooling methods can include natural cooling, air cooling, or water cooling. The cooling rate should be moderate to avoid residual stress and deformation in the sheet caused by rapid cooling. Straightening and trimming: The cooled sheet may have certain bending and deformation and needs to be straightened to improve the flatness and dimensional accuracy of the sheet. At the same time, according to the size requirements of the product, the sheet is trimmed to remove burrs and uneven parts at the edges. Surface treatment and inspection: Finally, the sheet is subjected to surface treatment, such as passivation, oiling, etc., to improve the corrosion resistance and surface quality of the sheet. And a comprehensive inspection of the size, mechanical properties, surface quality, etc. of the sheet is carried out to ensure that the product meets the quality standard requirements.

[0008] In the early days, the rolling strip coiler and annealing furnace were two independent devices. The problem was that after continuous casting and rolling, the continuously cast and rolled slab on the coiler had to be cooled down before being unloaded, lifted to the annealing furnace, reheated, held, and cooled to complete annealing. The cooling of the continuously cast and rolled strip coil took several hours, and the time required for unloading the coil and lifting it to the annealing furnace was needed. Reheating, holding, and cooling in the annealing furnace took dozens of hours to complete annealing, wasting a large amount of energy and labor time. The remaining temperature of the continuously cast and rolled strip coil was not used as preheating for subsequent annealing in the following process, but was cooled to room temperature, wasting heat energy and labor time. Before warm rolling, it was also necessary to reload the furnace for heating and holding.

[0009] The emergence of the later fixed coiling annealing furnace that is matched with the Steckel rolling is a major technological advancement with obvious effects.

[0010] Heat preservation: During the rolling process, the thickness of the strip gradually decreases and the length increases, which will lead to too large a temperature difference. The coiling annealing furnace can compensate the temperature of the rolled piece, reduce the temperature drop, ensure uniform temperature distribution of the rolled piece, meet the rolling requirements, and help control the microstructure and properties of the rolled piece.

[0011] Temporary storage: Provide temporary storage space for the rolled piece during rolling, make the rolling process more continuous and stable, and facilitate the subsequent processes.

[0012] Structure and components Reel: Located inside the coiling annealing furnace, it is fixed and supported on the furnace body support structure by two bearing seats, and is driven by a motor through a coupling and a speed reducer, and is used for coiling the steel strip.

[0013] Pinch roll: Installed on both sides of the Steckel mill between the coiling annealing furnace, its function is to feed the head of the strip into the groove of the reel of the coiling annealing furnace.

[0014] Guard plate: Set at the bottom of the furnace body, it seals the furnace bottom when not coiling to reduce heat loss; when coiling, it is opened by an operating cylinder to form a channel to facilitate the introduction of the strip head into the reel.

[0015] Combustion control system: Generally uses energy media such as gas (or natural gas), mixes with air according to a certain air-fuel ratio and burns in the coiling annealing furnace to release heat, and provides heat for the rolled piece.

[0016] Working process: Before the rolling mill starts working, the combustion control system of the coiling annealing furnace is started to make the temperature in the furnace reach the set value. During the rolling process, when the strip is rolled out of the rolling mill, the pinch roll feeds the head of the strip into the groove of the reel of the coiling annealing furnace, the reel starts to rotate to coil the steel strip, and at the same time the combustion control system continuously supplies heat to maintain the temperature of the strip. When a coil of strip is coiled, the reel stops rotating and waits for the next coiling instruction.

[0017] Application scenarios: Mainly applied to the Steckel mill production line, used for producing wide-width thin-gauge steel plates, such as medium and heavy steel plates required in fields such as basic construction, construction machinery, transportation, energy and environmental protection, and national defense and military industry.

[0018] The Steckel mill solves the problems of energy waste and energy loss. However, since the reheating furnace of the Steckel mill is fixed on the rolling production line, it can provide temperature compensation but cannot be used for intermediate annealing during rolling. Because annealing requires long-term heat preservation, using it for intermediate annealing during rolling will seriously affect the rolling production efficiency. And intermediate annealing is required for rolling thin plates of materials such as magnesium alloys. The Steckel mill uses gas (or natural gas) for heating, and its environmental performance is poor. Since the Steckel mill is fixed, it can only coil the strip during hot rolling or warm rolling, and cannot be used for coiling continuous casting slabs.

[0019] Existing heat treatment equipment and processes for strip rolling waste a huge amount of heat energy and have low production efficiency. There is an urgent need to invent a new energy-saving and efficiency-enhancing heat treatment equipment to simplify the process flow, save heat energy, reduce production costs, and improve economic benefits. Summary of the Invention

[0020] The present invention provides a production device for continuous casting and warm rolling of magnesium alloys to solve the technical problems of huge heat energy waste and low production efficiency in the above-mentioned background technology.

[0021] To achieve the above object, the technical solution provided by the present invention is: A production device for continuous casting and warm rolling of magnesium alloys, comprising: A rolling device, an annealing device, and a warm rolling device. The magnesium alloy raw material is sequentially processed through the continuous casting device, the annealing device, and the warm rolling device; The annealing device includes a coiling annealing furnace, and the coiling annealing furnace includes a furnace body, and the furnace body is movably connected between the continuous casting device and the warm rolling device.

[0022] In an optional solution of the present invention, a plurality of the furnace bodies are provided, and the plurality of furnace bodies are intermittently replaced during the processing of the magnesium alloy raw material so that one of the furnace bodies is always connected between the continuous casting device and the warm rolling device.

[0023] In an optional solution of the present invention, a reel and a drum are provided in the furnace body; the reel is installed at the center of the furnace body and is used for winding the strip formed after the magnesium alloy raw material is processed by the rolling device; support discs are provided at both ends of the reel for supporting the drum sleeved outside the reel, and heat-insulating cotton is filled between the drum and the reel.

[0024] In an optional solution of the present invention, both ends of the reel are installed on the furnace body through bearing seats, and an axial positioning structure is provided at one of the two bearing seats at both ends for restricting the axial movement of the reel.

[0025] In an optional solution of the present invention, one end of the reel extends out of the furnace body, and a brake disc is provided on the extending end for braking the reel.

[0026] In an optional solution of the present invention, the shell of the furnace body is configured as a sandwich structure, and the sandwich is filled with thermal insulation cotton.

[0027] In an optional solution of the present invention, the outer surface of the outer shell of the furnace body is coated with a nano heat-insulating coating.

[0028] In an optional solution of the present invention, a plurality of electric heating rods are provided in the furnace body along the circumferential direction for heating the furnace body; and / or a heat circulation fan system is provided in the furnace body to ensure uniform heat distribution in the furnace body.

[0029] In an optional scheme of the present invention, the furnace body is provided with a material port for the plate and strip to enter and exit; a roller structure is provided at the material port for guiding the plate and strip; and / or a clamping mechanism is provided at the material port for clamping the plate and strip when the plate and strip is stationary.

[0030] In an optional scheme of the present invention, the coiling annealing furnace also includes a power supply mechanism, which includes a mounting platform buried in the furnace body, and the power supply mechanism includes an exposed pin shaft; a pin hole is provided on the furnace body base; when the furnace body is installed on the mounting platform, the pin shaft is correspondingly connected to the pin hole to complete electrical conduction.

[0031] The present invention has the following beneficial effects: By using an active coiling annealing furnace in the production device from casting and rolling to warm rolling of magnesium alloy plates, the magnesium alloy plates can be kept in a heat preservation and heating state all the time, which greatly facilitates the operation of the heating and heat preservation annealing process during the rolling process, greatly reduces heat loss, and saves a lot of energy; at the same time, the coiling annealing furnace cooperates with other equipment during the rolling process to realize fully automatic unmanned rapid coil changing, which solves the process requirement of the casting and rolling machine for rapid coil changing; at the same time, the strip threading, leading, curling and uncoiling actions during the coil changing process can be fully automatic and unmanned, which greatly improves the automation level of the production line, saves a lot of labor costs, saves the time of coil changing operations, greatly improves the efficiency of the magnesium alloy plate and strip rolling production line, and completely solves the problem of heat preservation, heating and annealing of magnesium alloy plates and strips during casting and warm rolling, greatly improves product quality and yield rate, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 Schematic structural diagram of the coiling annealing furnace according to an embodiment of the present invention; Figure 2 According to an embodiment of the present invention Figure 1 Left view; Figure 3 According to an embodiment of the present invention Figure 1 Top view; Figure 4 Schematic internal sectional structure diagram of the furnace chamber of the coiling annealing furnace according to an embodiment of the present invention; Figure 5 According to an embodiment of the present invention Figure 4 Left view; Figure 6 Schematic structural diagram of the coiling drum according to an embodiment of the present invention; Figure 7 External structural diagram of the coiling drum according to an embodiment of the present invention; Figure 8 According to an embodiment of the present invention Figure 7 Cross-sectional view; Figure 9 Schematic structural diagram of the furnace opening of the coiling annealing furnace according to an embodiment of the present invention; Figure 10 Schematic structural diagram of the transmission mechanism inside the furnace chamber according to an embodiment of the present invention.

[0034] Reference numerals: 100, strip; 1, furnace body; 2, furnace body base; 3, pin hole; 4, sealing mechanism; 5, clamping plate mechanism; 6, idler roller mechanism; 7, hot circulation fan system; 8, bearing seat; 9, centering shaft hole teeth; 10, brake disc; 11, drive shaft; 12, coiling drum; 13, heat preservation felt; 14, heat preservation felt; 15, cooling fan; 16, belt pulley; 17, drive shaft; 18, belt; 19, belt pulley; 20, drive motor; 21, housing; 22, fan impeller; 23, inner housing; 24, support disc; 25, support bearing; 26, electric heating rod; 27, electrode shield; 28, coiling annealing furnace leading strip; 30, furnace opening; 31, pin shaft; 32, upper sealing plate; 33, drive oil cylinder; 34, lower sealing plate. Detailed implementation manners

[0035] In the description of the present invention, it should be understood that when descriptions of orientation or positional relationships such as "center", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. appear, without special instructions, they are understood to be based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] In addition, features limited by "first" and "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Features limited by "first" and "second" may explicitly or implicitly include at least one of the limited features. When the description "a plurality of" appears, it generally means at least two, such as two, three, etc., unless otherwise specifically limited.

[0037] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of this specification, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] The present invention provides a magnesium alloy continuous casting and rolling warm rolling production device, including: a continuous casting and rolling device, an annealing device, and a warm rolling device, and the magnesium alloy raw material is sequentially processed through the continuous casting and rolling device, the annealing device, and the warm rolling device; the annealing device includes a coiling annealing furnace, and the coiling annealing furnace includes a furnace body, and the furnace body is movably connected between the continuous casting and rolling device and the warm rolling device.

[0040] Figures 1 to 3 A coiling annealing furnace according to a specific embodiment of the present invention is provided.

[0041] Figure 1The structural schematic diagram of the coiling annealing furnace of the present invention is shown; the coiling annealing furnace mainly includes a furnace body 1, a base of the furnace body 1, pin holes 3, a sealing mechanism 4, a clamping plate mechanism 5, a roller mechanism 6 and a thermal circulation fan system 7. The clamping plate mechanism 5 and the roller mechanism 6 are arranged inside the furnace body 1 to introduce the magnesium alloy strip 100 fed into the furnace mouth 30 into the furnace chamber. The thermal circulation fan system 7 enables the air flow inside the entire furnace chamber to be in a circulating state, so that the temperature inside the entire furnace chamber is relatively uniform. There are pin holes 3 on the base of the furnace body 1, which are convenient for clamping with the pin shafts 31 on the installation platform.

[0042] The entire furnace body 1 is movably arranged and is provided in multiple numbers. In this way, multiple furnace bodies 1 are intermittently replaced during the processing of the magnesium alloy raw materials, so that there is always one furnace body 1 connected between the casting and rolling device and the warm rolling device.

[0043] A base of the furnace body 1 is provided under the furnace body 1 of the coiling annealing furnace. The two bottom plates at the front and back of the furnace shell of the furnace body 1 are installed and fixed on the base of the furnace body 1 for support and positioning; the central drive shaft 11 inside the furnace chamber and the bearing seat 8 outside the furnace chamber are also installed and fixed on the base of the furnace body 1 for support and positioning; the support seats on both sides outside the furnace chamber of the clamping plate mechanism 5 and the roller mechanism 6 are also installed and fixed on the base of the furnace body 1. There are pin holes 3 for positioning and containing conductive electrodes installed under the base of the furnace body 1. These pin holes 3 are used to cooperate with the four positioning pin shafts 31 of the quick coiling change moving slide of the coiling drive station to achieve the precise positioning of the coiling annealing furnace on the quick coiling change moving slide. At the same time, there are also conductive electrodes inside the four positioning floor pin holes 3 and the pin shafts 31. When the coiling annealing furnace is positioned on the quick coiling change slide, the conductive electrodes inside the positioning floor pin holes 3 and the pin shafts 31 are connected to automatically supply power to the coiling annealing furnace.

[0044] This kind of furnace body 1 can be lifted by a crane and moved to any position according to the use needs, but the magnesium alloy strip 100 inside the furnace chamber is always in a heat preservation state.

[0045] The cast-rolled slab is rolled out of the casting and rolling mill at a speed of several meters per second and sent to the reel of the coiling and annealing furnace in the card slot of the reel 12 of the magnesium alloy strip 100 by the conveying roller. As the reel 12 of the coiling machine rotates, the magnesium alloy slab is coiled into a coil. The magnesium alloy coil becomes thicker and thicker. When it reaches the designed diameter or weight, the magnesium alloy cast-rolled slab is cut off and locked to prevent it from rebounding and unwinding. Then the coil is moved to the open space in the reserved annealing area with the coiling and annealing furnace for annealing. Make room and replace it with another empty mobile coiling and annealing furnace to continue coiling the next furnace of cast-rolled slab. After annealing is completed, it is moved to the warm rolling production line with the coiling and annealing furnace, uncoiled, and welded (riveted) with a leading strip for warm rolling. As the rolling process progresses, the cast-rolled slab is gradually pulled out of the coiling and annealing furnace, rolled by the warm rolling mill, and enters the coiling and annealing furnace on the other side of the warm rolling mill. The strip 100 is rolled back and forth. When it is rolled to a certain amount of deformation, the strip 100 is disconnected, and the strip 100 is rolled into the coiling and annealing furnace. The coiling and annealing furnace moves to the annealing area for intermediate annealing during the rolling process. After annealing is completed, it is moved to the rolling production line again to uncoil, weld (rivet) the leading strip, and perform reciprocating rolling. When it is rolled to the finished thickness dimension, the strip 100 is disconnected, and the coil is moved to the annealing area with the coiling and annealing furnace for annealing. After annealing is completed, the coil in the furnace coil mill is coiled out by the coiling machine and stored in the warehouse. Throughout the process, the magnesium alloy coil has been in the coiling and annealing furnace, and the required rolling preheating or annealing temperature has been maintained in the furnace until the end of the finish rolling and annealing process, and then it is uncoiled from the inside of the coiling and annealing furnace to become a finished product.

[0046] Figure 2 shows the Figure 1 left view of the coiling and annealing furnace; Figure 3 shows the Figure 1 top view of the coiling and annealing furnace; The coiling and annealing furnace further includes a bearing seat 8, a centering shaft hole tooth 9, and a brake disc 10. A reel and a reel 12 are provided in the furnace body 1; the reel is installed at the center of the furnace body 1 and is used for winding the strip 100 formed after the magnesium alloy raw material is processed by the rolling device; support discs 24 are provided at both ends of the reel for supporting the reel 12 sleeved outside the reel, and heat insulation cotton is filled between the reel 12 and the reel.

[0047] Both ends of the reel are installed on the furnace body 1 through the bearing seat 8, and an axial positioning structure is provided at one of the two bearing seats 8 at both ends for restricting the axial movement of the reel.

[0048] In an optional solution, one end of the reel extends out of the furnace body 1, and a brake disc 10 is provided on the extended end for braking the reel.

[0049] In an optional solution, the housing 21 of the furnace body 1 is provided as a sandwich structure, and heat insulation cotton is filled in the sandwich.

[0050] In an optional solution, the outer surface of the outer shell 21 of the furnace body 1 is coated with a nano-scale heat-insulating coating.

[0051] In an optional solution, a plurality of electric heating rods 26 are provided in the furnace body 1 along the circumferential direction for heating the furnace body 1; and / or a heat circulation fan system 7 is provided in the furnace body 1 to ensure uniform heat distribution in the furnace body 1.

[0052] In an optional scheme, the furnace body 1 is provided with a material port for the plate strip 100 to enter and exit; a roller structure is provided at the material port for guiding the plate strip 100; and / or a clamping mechanism 5 is provided at the material port for clamping the plate strip 100 when the plate strip 100 is stationary.

[0053] In an optional scheme, the coiling annealing furnace also includes a power supply mechanism, which includes a mounting platform buried in the furnace body 1, and the power supply mechanism includes an exposed pin shaft 31; a pin hole 3 is provided on the base of the furnace body 1; when the furnace body 1 is installed on the mounting platform, the pin shaft 31 is correspondingly connected to the pin hole 3 to complete electrical conduction.

[0054] Figures 4 to 5 A coil annealing furnace according to a specific embodiment of the present invention is provided.

[0055] Figure 4 , Figure 5 and Figure 10 The internal structure schematic diagram of the coiling annealing furnace of the present invention is shown; a central driving shaft 11 of the coiling annealing furnace is arranged at the center position of the furnace body 1 of the coiling annealing furnace, and a magnesium alloy plate and strip 100 reel 12 is sleeved on the outside of the reel, a support disk 24 is arranged on the left side of the middle reel, and together with the right support disk 24, the outer magnesium alloy plate and strip 100 reel 12 is supported, and a thermal insulation felt 13 is filled between the central driving shaft 1711 of the coiling annealing furnace and the magnesium alloy plate and strip 100 reel 12; the left side of the magnesium alloy plate and strip 100 reel 12 and the support disk 24 of the central driving shaft 11 of the coiling annealing furnace are bolted to perform axial positioning and transmit the coiling torque; the right side of the magnesium alloy plate and strip 100 reel 12 and the right support disk 24 are centered and supported, and axial movement is allowed to release the axial thermal expansion stress of the magnesium alloy plate and strip 100 reel 12.

[0056] Both ends of the central drive shaft 11 of the coiling annealing furnace are supported by the central drive shaft 11 support bearing 25 and the central drive shaft 11 bearing seat 8, and are installed and fixed on both sides of the base of the furnace body 1. The right bearing adopts an axial positioning structure, which does not allow the axial movement of the reel, while the left bearing does not adopt an axial positioning structure, allowing the reel to move axially to release the axial thermal expansion stress of the central drive shaft 11 of the coiling annealing furnace.

[0057] On the right side of the center drive shaft 11 of the coiling annealing furnace, a brake disc 10 of the center drive shaft 11 is installed outside the furnace chamber. It cooperates with a hydraulic brake caliper (purchased as a finished product, not shown in the figure) installed on the base of the furnace body 1 to achieve the braking of the reel, so as to brake the reel when the coiling annealing furnace is not coiling or uncoiling, and prevent the magnesium alloy sheet coil in the furnace from loosening.

[0058] On the outer ends of both sides of the furnace body 1 where the center drive shaft 11 of the coiling annealing furnace extends, centering shaft holes are provided. There are also centering shaft hole teeth 9 at the right-side shaft hole, which cooperate with the centering thimble mechanisms of the coiling drive mechanisms (not shown in the figure) on both sides of the coiling station (one of the centering thimbles also has engaging teeth) to achieve the centering rotation of the coiling main shaft in the coiling annealing furnace and transmit the coiling drive torque.

[0059] Figure 4 It is shown that inside the furnace body 1 of the coiling annealing furnace, an inner furnace chamber shell 2321 is provided, and heat-insulating felts 14 are filled between the inner and outer shells 21; fin-type electric heating rods 26 of the coiling annealing furnace are arranged circumferentially inside the furnace chamber of the coiling annealing furnace for heating the coiling annealing furnace; electrode protection covers are also installed on both sides of the heating rods outside the furnace shell.

[0060] The upper part of the furnace body 1 is also equipped with a heat circulation fan mechanism, a heat circulation fan housing 21 and a heat circulation fan impeller 22 are arranged inside the furnace, the heat circulation fan drive shaft 11 is extended and fixed from both sides, and the left shaft body is equipped with a fan drive synchronous transmission toothed belt 18 responsible for transmission; a cooling fan 15 at the shaft end of the fan drive shaft 11 is also installed on the outer side of the shaft head, which is responsible for dissipating the heat of the synchronous toothed belt pulley 16 here, and a heat circulation fan drive motor 20 is also installed on the upper furnace body 1 housing 21 of the shaft body, and a motor shaft end synchronous toothed belt pulley 16 is also installed on the motor drive shaft 1711, and the fan shaft below is driven by the fan drive synchronous transmission toothed belt 18 to drive the fan to rotate. The heat circulation fan mechanism adopts a centrifugal fan, which adopts an internal circulation mode. The centrifugal fan is at the top of the furnace, and the circulating air blows from the tangential direction to the inner circumferential shell 21 of the furnace, and blows through all the flap-type heating rods arranged along the circumferential direction of the furnace shell to exchange heat and bring heat to all parts of the furnace coil. A soft sealing mechanism 4 is also installed at the furnace mouth 30 of the furnace body 1 of the coiling annealing furnace. When the coiling annealing furnace strip 100 moves in and out, the soft sealing mechanism 4 opens. When the coiling annealing furnace stops curling and enters the insulation return state, the soft sealing mechanism 4 closes the furnace mouth 30 to reduce the heat loss at the furnace mouth 30 and save energy. A clamping mechanism 5 and a roller mechanism 6 are also installed at the front of the furnace body 1 of the coiling annealing furnace near the furnace mouth 30. The clamping mechanism 5 tightens the strip 100 inside the furnace when the strip 100 stops moving in and out to prevent the coil in the furnace from loosening. The support drive mechanisms on both sides of the clamping mechanism 5 are on both sides outside the furnace and are installed and fixed on the base of the coiling annealing furnace; the roller device plays a guiding role inside the furnace when the strip 100 moves in and out. The support drive mechanisms on both sides are on both sides outside the furnace and are installed and fixed on the same clamping support seat with the clamping mechanism 5.

[0061] Figures 6 to 8 A schematic diagram of the structure of a coiling drum 12 inside a coiling annealing furnace according to a specific embodiment of the present invention is provided.

[0062] Figures 6 to 8 It is shown that a coiling annealing furnace lead belt 28 is also installed on the reel 12 of the magnesium alloy strip 100, which is made of 0.5 mm to 2.0 mm stainless steel cold-rolled plate, and cooperates with the mobile fast riveting mechanism on the casting and warm rolling production lines to realize the rapid and automatic coiling and uncoiling action of the magnesium alloy strip 100 when entering and exiting the coiling annealing furnace.

[0063] Figure 9 The soft sealing mechanism 4 installed at the furnace mouth 30 of the coiling annealing furnace according to a specific embodiment of the present invention is shown, which mainly includes an upper sealing plate 32, a lower sealing plate 34 and a driving cylinder 33.

[0064] The above coiling annealing furnace can integrate heat preservation, heating, and coiling, and is set to be movable. This coiling annealing furnace integrates the magnesium alloy plate coiling mechanism and the heating furnace into one unit, with one furnace for one coil, and can be moved to any position as needed. The magnesium alloy plate cast and rolled can directly enter the coiling annealing furnace for coiling. After coiling, the magnesium alloy plate coil and the coiling annealing furnace are transported away together, making room for another empty movable coiling annealing furnace to continue coiling the next furnace. The temperature inside the transported coiling annealing furnace remains at the annealing temperature until the cast and rolled plate coil inside the furnace reaches the annealing time, then the coiling annealing furnace and the magnesium alloy plate coil inside are transported to the warm rolling production line, the leading strip is riveted on, and rough rolling and finish rolling are carried out. One such movable coiling annealing furnace is arranged in front of and behind the warm rolling mill respectively. The magnesium alloy plate coil comes out of one coiling annealing furnace, is rolled by the rolling mill, and is directly coiled into the empty coiling annealing furnace on the other side for coiling, and then the rolling process is repeated. When the strip 100 is rolled to a certain deformation amount and needs intermediate annealing, the strip 100 is disconnected, and the plate coil is transported away from the rolling line together with the coiling annealing furnace for annealing. Another coiling annealing furnace equipped with a plate coil is replaced to continue warm rolling. Throughout the process, the magnesium alloy plate coil remains inside the coiling annealing furnace all the time, and the required rolling preheating or annealing temperature is maintained inside the furnace until the finish rolling and annealing processes are completed, and then it is uncoiled from the inside of the coiling annealing furnace to become a finished product.

[0065] A middle reel is arranged on the furnace body 1 of the coiling annealing furnace, and a reel 12 of magnesium alloy sheet and strip 100 is sheathed on the outside of the reel. Support disks 24 are arranged on both sides of the middle reel to support the outer reel 12, and thermal insulation cotton is filled between the reel 12 and the drive shaft 11; the left side of the reel 12 is connected to the reel support disk 24 by bolts for axial positioning and transmitting the coiling torque; the right side of the reel 12 is supported by the reel support disk 24 for centering, and axial movement is allowed to release the axial thermal expansion stress of the reel 12; a fixed guide device is installed on the reel 12 inside the coiling annealing furnace, and the guide is a stainless steel cold-rolled plate with a thickness of 0.5 mm to 2.0 mm, which cooperates with the mobile fast riveting mechanism on the casting and warm rolling production line to realize the fast and automatic coiling and uncoiling action of the magnesium alloy sheet and strip 100 when entering and leaving the coiling annealing furnace; bearing seats 8 are installed at both ends of the reel , fixed on both sides of the coiling annealing furnace base, wherein the right bearing adopts an axial positioning structure, which does not allow the axial movement of the reel, while the left bearing does not adopt an axial positioning structure, allowing the reel to move axially to release the axial thermal expansion stress of the reel; the right side of the reel extending out of the furnace is equipped with a brake disc 10, which cooperates with the hydraulic brake caliper installed on the base outside the furnace shell to achieve the braking of the reel, so as to brake the reel when the coiling annealing furnace is not curling and unwinding, and prevent the magnesium alloy plate in the furnace from unwinding; the coiling spindle in the coiling annealing furnace extends out of the furnace body 1 on both sides of the outer end thereof, and there are also engaging teeth at the right side of the spindle hole, which cooperates with the centering ejector mechanism of the coiling drive mechanism on both sides of the coiling station (the centering ejector on one side also has engaging teeth) to achieve the centering rotation of the coiling spindle in the coiling annealing furnace and transmit the coiling drive torque. The left side of the reel extending out of the furnace is equipped with a reel drive motor 20.

[0066] An inner shell 23 is arranged inside the shell 21 of the coiling annealing furnace, and heat insulation cotton is filled between the inner and outer shells; a plurality of fin-type electric heating rods 26 are arranged in the circumferential direction inside the furnace of the coiling annealing furnace to heat the coiling annealing furnace; a heat circulation fan system 7 is also arranged on the upper part of the furnace of the coiling annealing furnace, which adopts a centrifugal fan and an internal circulation mode. The centrifugal fan is at the top of the furnace, and the circulating air blows from the tangential direction to the inner circumferential shell 21 of the furnace, and blows through all the fin-type heating rods arranged along the circumferential direction of the furnace shell to exchange heat and bring heat to all parts of the furnace coil; A soft sealing mechanism 4 is provided on the outer side of the furnace mouth 30 of the coiling annealing furnace. When the coiling annealing furnace strip 100 moves in and out, the soft sealing mechanism 4 opens. When the coiling annealing furnace stops curling and enters the insulation return state, the soft sealing mechanism 4 closes the furnace mouth 30 to reduce heat loss at the furnace mouth 30 and save energy.

[0067] At the outlet of the coiling annealing furnace, there is a roller mechanism 6 and a splint mechanism 5. The roller device plays a guiding role when the strip 100 enters and exits inside the furnace chamber; the splint mechanism 5 clamps the strip 100 when the strip 100 stops entering and exiting inside the furnace chamber to prevent the coil in the furnace from loosening. Below the coiling annealing furnace, there is a support and positioning base. The reel inside the furnace chamber is installed and fixed on the base through the bearing block 8 outside the furnace chamber; the two bottom plates in the front and back of the furnace shell of the coiling annealing furnace are also installed and fixed on the base. The support seats outside the furnace chamber of the guiding rollers and the splint mechanism 5 inside the furnace chamber of the coiling annealing furnace are also installed and fixed on the base of the coiling annealing furnace. Below the base of the coiling annealing furnace, there are four positioning anchor pin holes 3, which are used to cooperate with the four positioning pin shafts 31 of the quick coil-changing moving slide of the coiling drive station to achieve the precise positioning of the coiling annealing furnace on the quick coil-changing moving slide. At the same time, conductive electrodes are provided inside the four positioning anchor pin holes 3 and the pin shafts 31. When the coiling annealing furnace is positioned on the quick coil-changing slide, the conductive electrodes in the positioning anchor pin holes 3 and the pin shafts 31 are connected to automatically supply power to the coiling annealing furnace.

[0068] The outer surface of the shell of the coiling annealing furnace is coated with a heat-insulating coating to reduce heat energy loss.

[0069] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects: After continuous casting and rolling, the continuously cast and rolled sheet directly enters the coiling annealing furnace, and then is transported away, making room for an empty coiling annealing furnace to continue coiling the subsequent rolled billets. Since the coiler is designed inside the coiling annealing furnace, the annealing process of cooling, unloading the coil, entering the coiling annealing furnace for reheating and then cooling in the existing process is saved, and annealing is directly carried out in the coiling annealing furnace. After annealing is completed, there is no need to take out of the furnace and reheating, and warm rolling can be carried out using the waste heat. After warm rolling to the limit deformation amount, coiling and annealing are carried out in the coiling annealing furnace at the other end of the rolling mill. During annealing, it is moved away from the rolling line. After moving away, another coiling annealing furnace is moved onto the rolling line to continue production. Since the coiling annealing furnace is movable, it can be moved to any idle position during annealing, saving the factory building area.

[0070] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A magnesium alloy casting and warm rolling production device, characterized in that: include: A casting and rolling device, an annealing device and a warm rolling device, wherein the magnesium alloy raw material is processed in sequence through the casting and rolling device, the annealing device and the warm rolling device; The annealing device comprises a coiling annealing furnace, and the coiling annealing furnace comprises a furnace body, and the furnace body is movably connected between the casting and rolling device and the warm rolling device.

2. The magnesium alloy casting and warm rolling production device according to claim 1, characterized in that: The furnace bodies are provided in plurality, and the plurality of furnace bodies are intermittently replaced during the magnesium alloy raw material processing process, so that one furnace body is always connected between the casting and rolling device and the warm rolling device.

3. The magnesium alloy casting and warm rolling production device according to claim 1 or 2, characterized in that: A reel and a drum are provided in the furnace body; the reel is installed in the center of the furnace body and is used to wind the slab formed after the magnesium alloy raw material is processed by the casting and rolling device; support plates are provided at both ends of the reel for supporting the drum sleeved outside the reel, and thermal insulation cotton is filled between the drum and the reel.

4. The magnesium alloy casting and warm rolling production device according to claim 3 is characterized in that: The two ends of the reel are mounted on the furnace body via bearing seats, and one of the bearing seats at the two ends is provided with an axial positioning structure for limiting the axial movement of the reel.

5. The magnesium alloy casting and warm rolling production device according to claim 4, characterized in that: One end of the reel extends out of the furnace body, and a brake disc is provided on the extended end for braking the reel.

6. The magnesium alloy casting and warm rolling production device according to claim 3, characterized in that: The shell of the furnace body is set as a sandwich structure, and the sandwich is filled with thermal insulation cotton.

7. The magnesium alloy casting and warm rolling production device according to claim 6, characterized in that: The outer surface of the outer shell of the furnace body is coated with a nano heat insulation coating.

8. The magnesium alloy casting and warm rolling production device according to claim 6 or 7, characterized in that: A plurality of electric heating rods are arranged in the furnace body along the circumferential direction for heating the furnace body; and / or a heat circulation fan system is arranged in the furnace body to ensure uniform heat distribution in the furnace body.

9. The magnesium alloy casting and warm rolling production device according to claim 3, characterized in that: The furnace body is provided with a material port for the plate and strip to enter and exit; a roller structure is provided at the material port for guiding the plate and strip; and / or a clamping mechanism is provided at the material port for clamping the plate and strip when the plate and strip is stationary.

10. The magnesium alloy casting and warm rolling production device according to claim 1, characterized in that: The coiling furnace also includes a power supply mechanism, which includes a mounting platform embedded in the furnace body and an exposed pin shaft; a pin hole is provided on the furnace body base; when the furnace body is installed on the mounting platform, the pin shaft is correspondingly connected to the pin hole to complete electrical conduction.

Images