Vertical annealing equipment for ultra-thin metal strip

Abstract

The utility model relates to vertical annealing equipment for a metal ultra-thin strip and an operation method, and belongs to the related technical field of metal ultra-thin strip hot working, the vertical annealing equipment comprises a furnace body device, a tension measuring device, a direction roller, an unwinding device, a winding device, a straightening device and a deviation rectifying device, the furnace body device comprises a muffle tank and a furnace body shell, a plurality of groups of elastic brackets fixedly connected with the furnace body shell are arranged on the outer side of the muffle tank in the length direction of the muffle tank, and the top of the muffle tank is fixedly connected with the top of the inner side of the furnace body shell through the top elastic bracket, so that the service life of the muffle furnace is prolonged; one side of the furnace body shell is respectively connected with a molecular pump and a gas inlet through steel pipes, the other side of the furnace body shell is provided with a gas outlet, and pipelines for connecting the molecular pump, the gas inlet and the gas outlet are respectively provided with a gas valve, so that the conversion between vacuum annealing and atmosphere annealing in the muffle furnace is realized; and the straightening device comprises a plurality of straightening rollers, so that high-precision straightening can be carried out on the annealed metal ultra-thin strip, and the strip shape quality of the strip is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot processing of ultra-thin metal strips, specifically relating to a vertical annealing device for ultra-thin metal strips. Background Technology

[0002] Ultra-thin metal strips are attracting increasing attention due to their superior performance and broad application prospects. Especially in high-end manufacturing industries such as aerospace, electronics, and precision instruments, the quality and performance requirements for ultra-thin metal strips are extremely high. Annealing, as a key process in the production of ultra-thin metal strips, primarily aims to eliminate work hardening, improve the material's microstructure and properties, enhance the strip's dimensional accuracy and surface quality, and prepare it for subsequent processing and use.

[0003] In horizontal annealing furnaces, the span between the two support points of the strip is relatively large during the annealing process. Due to its own weight, the strip is prone to sinking, and the rigidity of the strip deteriorates at high temperatures, making it difficult to control the annealing quality.

[0004] Traditional vertical annealing furnaces have some shortcomings when processing extremely thin metal strips:

[0005] 1. Muffle cans are prone to deformation at high temperatures. Without corresponding deformation buffering measures, the muffle cans are prone to irreversible deformation, which will affect the service life of the muffle cans and the stability of annealing quality.

[0006] 2. Due to their small size, extremely thin metal strips are prone to defects such as creases and ribs during annealing, which reduces the quality of the product and the yield rate.

[0007] 3. Ultra-thin metal strips such as titanium, titanium alloys, and zirconium alloys need to be kept in a vacuum state during annealing, while other ultra-thin metal strips such as stainless steel, copper, and copper alloys need to be annealed in an atmosphere. Since the application of ultra-thin metal strips involves small batches and many types, corresponding atmosphere conversion is required for different metals. Utility Model Content

[0008] In view of this, in order to solve the problems of existing vertical annealing furnaces where the muffle jar is prone to deformation, affecting the service life of the muffle jar and the stability of annealing quality; and the plate shape defects such as creases and ribs that are easily generated during the annealing process, reducing the product plate shape quality and yield, and making it difficult to meet the atmosphere conversion requirements of different metals, this utility model provides a vertical annealing device for extremely thin metal strips.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A vertical annealing apparatus for ultra-thin metal strips, comprising:

[0011] The furnace body assembly includes a muffle tank and a furnace shell. Multiple sets of elastic supports are fixedly connected to the furnace shell on the outer side of the muffle tank along its length. The top of the muffle tank is fixedly connected to the top of the inner side of the furnace shell through a top elastic support. A molecular pump and a gas inlet are connected to one side of the furnace shell through steel pipes, and a gas outlet is provided on the other side of the furnace shell. Gas valves are provided on the pipes connecting the molecular pump, gas inlet, and gas outlet.

[0012] Tension measuring devices are installed at the top and bottom of the furnace body assembly;

[0013] The unwinding device and the rewinding device are respectively located on both sides of the furnace body device;

[0014] The directional roller is located between the winding device and the furnace body device.

[0015] A straightening device and a correction device are sequentially arranged on the upper part of the directional roller; the straightening device includes multiple straightening rollers for straightening the strip.

[0016] Furthermore, the furnace body, unwinding device, winding device, and directional rollers are all mounted on the same equipment base plate, which has high overall rigidity and is not prone to deformation, thus improving the shape and annealing efficiency of the ultra-thin metal strip.

[0017] Furthermore, the surface of the muffle furnace adopts a ribbed structure to reduce the degree of creep deformation and improve the service life of the muffle furnace.

[0018] Furthermore, the furnace body device also includes heating wires, an inlet sealing chamber, an outlet sealing chamber, sealing rollers, a furnace body support, and rigid supports; multiple sets of heating wires are arranged on the outer side of the muffle can along its length; an inlet sealing chamber and an outlet sealing chamber are respectively arranged at the bottom and top of the furnace body shell; the inlet sealing chamber and the outlet sealing chamber are respectively provided with a strip inlet and a strip outlet; a pair of sealing rollers are rotatably arranged at both the strip inlet and the strip outlet; a furnace body support is fixedly arranged around the furnace body shell; the furnace body support is fixed to the furnace body shell by two sets of rigid supports.

[0019] Furthermore, the tension measuring device includes a tension measuring roller and a tension sensor. The tension measuring rollers are respectively set at the strip inlet and strip outlet. The tension measuring roller at the top of the furnace body is fixed to the furnace body support by a tension sensor, and the tension measuring roller at the bottom of the furnace body is fixed to the top of the equipment base plate by a tension sensor. By setting tension measuring rollers at the strip inlet and strip outlet of the furnace body, the tension of the strip inside the furnace body can be accurately measured and controlled, thereby improving the annealing quality of ultra-thin metal strips.

[0020] Furthermore, the unwinding device includes an unwinding drum, an unwinding gearbox, and an unwinding motor. The output end of the unwinding gearbox is connected to the unwinding drum, and its input end is connected to the unwinding motor.

[0021] Furthermore, the straightening device also includes a straightening bracket and a hydraulic bracket. The straightening bracket is fixedly installed on the top of the equipment base plate, and the straightening roller is movably connected inside the straightening bracket through the hydraulic bracket. The annealed ultra-thin metal strip is straightened by the straightening roller to improve the strip shape quality of the ultra-thin metal strip.

[0022] Furthermore, the correction device includes a correction roller, two correction tracks, and a correction motor. The correction roller is slidably connected to the inside of the two correction tracks via bearing seats. The positions of the bearing seats in the two correction tracks are controlled by the correction motor connected to them. The correction roller controls the metal strip to the center position of the process line in a timely manner, preventing the ultra-thin metal strip from having increased winding layer faults due to eccentricity. Excessive eccentricity may even cause sheet shape defects such as ribs and marks on the ultra-thin metal strip.

[0023] Furthermore, the winding device includes a winding drum, a winding gearbox, and a winding motor, wherein the output end of the winding gearbox is connected to the winding drum, and its input end is connected to the winding motor.

[0024] Furthermore, the tension measuring roller, the correction roller, and the direction roller are all convex rollers. Since the metal strip is very thin, it is easy to cause defects such as creases and ribs when passing through the rollers at speed. Using convex rollers effectively reduces the shape defects of the metal strip.

[0025] Furthermore, there are seven straightening rollers.

[0026] Furthermore, the furnace body device, tension measuring device, unwinding device, straightening device, correction device, and directional rollers are all covered by the same equipment housing.

[0027] The beneficial effects of this utility model are as follows:

[0028] 1. The vertical annealing equipment for ultra-thin metal strips disclosed in this utility model has multiple sets of elastic supports fixedly connected to the furnace shell along the outer side of the muffle tank along its length. The top of the muffle tank is fixedly connected to the top of the inner side of the furnace shell through the top elastic support. Under high temperature, it can buffer creep deformation and avoid hard contact with the furnace shell. At the same time, the surface of the muffle furnace adopts a ribbed structure to further reduce the degree of creep deformation of the muffle furnace and improve the service life of the muffle furnace.

[0029] 2. The vertical annealing equipment for ultra-thin metal strips disclosed in this utility model has a molecular pump and a gas inlet connected to the outer shell of the furnace by a steel pipe. A gas outlet is provided on the other side of the outer shell of the furnace. Gas valves are provided on the pipes where the molecular pump, gas inlet and gas outlet are located, which can realize the conversion between vacuum annealing and atmosphere annealing in the muffle furnace.

[0030] 3. The vertical annealing equipment for ultra-thin metal strip disclosed in this utility model can perform high-precision straightening of ultra-thin metal strip after annealing through the cooperation of seven straightening rollers and hydraulic support, effectively improving its strip shape quality; at the same time, the tension roller, the correction roller and the direction roller are all convex rollers, which further effectively reduces the strip shape defects of ultra-thin metal strip.

[0031] 4. The vertical annealing equipment for ultra-thin metal strips disclosed in this utility model is fixed on the base plate of the equipment, which has high overall rigidity and is not easy to deform, thereby improving the shape and annealing efficiency of the ultra-thin metal strip. The equipment shell covers most of the device, keeping the entire production line environment relatively clean, reducing the impact of external pollutants on the surface quality of the ultra-thin metal strip, and improving product quality.

[0032] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of the internal structure of a vertical annealing device for ultra-thin metal strips according to this utility model. Figure 1 ;

[0035] Figure 2 This is a schematic diagram of the internal structure of a vertical annealing device for ultra-thin metal strips according to this utility model. Figure 2 ;

[0036] Figure 3 This is a schematic diagram of the internal structure of a vertical annealing device for ultra-thin metal strips according to this utility model, as well as a diagram of the strip threading process.

[0037] Figure 4 This is a schematic diagram of the structure of a vertical annealing device for ultra-thin metal strips according to the present invention.

[0038] Reference numerals: 1. Furnace body assembly; 101. Muffle tank; 102. Elastic support; 103. Furnace shell; 104. Top elastic support; 105. Heating wire; 106. Inlet sealing chamber; 107. Outlet sealing chamber; 108. Sealing roller; 109. Furnace body support; 110. Rigid support; 111. Molecular pump; 112. Gas inlet; 113. Gas outlet; 2. Tension measuring device; 201. Tension measuring roller; 202. Tension sensor; 3. Equipment base plate; 4. Unwinding device; 401. Unwinding drum; 402. Unwinding gearbox; 403. Unwinding motor; 5. Straightening device; 501. Straightening bracket; 502. Straightening roller; 503. Hydraulic support; 6. Deviation correction device; 601. Deviation correction roller; 602. Deviation correction track; 603. Deviation correction motor; 7. Direction roller; 8. Rewinding device; 801. Rewinding drum; 802. Rewinding gearbox; 803. Rewinding motor; 9. Equipment casing. Detailed Implementation

[0039] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] like Figures 1-4 The vertical annealing equipment for ultra-thin metal strips shown includes a furnace body 1, a tension measuring device 2, an equipment base plate 3, an unwinding device 4, a straightening device 5, a deviation correction device 6, a directional roller 7, a winding device 8, and an equipment shell 9. A tension measuring device 2 is fixedly installed at the top and bottom of the furnace body 1. The furnace body 1 and the tension measuring device 2 are fixedly installed at the top center of the equipment base plate 3. The unwinding device 4 is fixedly installed on one side of the equipment base plate 3, and the straightening device 5 is fixedly installed on the other side of the equipment base plate 3. The deviation correction device 6 is fixedly installed at the top of the straightening device 5, and the directional roller 7 is fixedly installed at the bottom of the straightening device 5 at the top of the equipment base plate 3. The winding device 8 is fixedly installed on the side of the equipment base plate 3 opposite to the unwinding device 4. The furnace body 1, the tension measuring device 2, the unwinding device 4, the straightening device 5, the deviation correction device 6, and the directional roller 7 are all covered by the same equipment shell 9. The entire annealing setup is fixedly mounted on the equipment base plate 3, which gives the equipment high overall rigidity and makes it less prone to deformation, thus improving the shape and annealing efficiency of the ultra-thin metal strip. The equipment shell 9 covers most of the devices, keeping the entire production line environment relatively clean and reducing the impact of external contaminants on the surface quality of the ultra-thin metal strip.

[0041] The furnace body device 1 includes a muffle tank 101, an elastic support 102, a furnace shell 103, a top elastic support 104, a heating wire 105, an inlet sealing chamber 106, an outlet sealing chamber 107, a sealing roller 108, a furnace body support 109, a rigid support 110, a molecular pump 111, a gas inlet 112, and a gas outlet 113. Multiple sets of elastic supports 102, fixedly connected to the furnace shell 103, are arranged on the outer side of the muffle tank 101 along its length. The top of the muffle tank 101 is fixedly connected to the inner top of the furnace shell 103 via a top elastic support 104. The muffle furnace 101 is prone to creep deformation at high temperatures. The top and sides of the muffle furnace 101 can be fixed by the top elastic support 104 and elastic support 102, and the creep deformation of the muffle furnace 101 along its length and circumference can be buffered. This prevents the muffle furnace 101 from making hard contact with the furnace shell at high temperatures, thus avoiding deformation of the muffle furnace 101 and improving its service life. At the same time, the surface of the muffle furnace 101 adopts a ribbed structure, which further reduces the degree of creep deformation of the muffle furnace 101 and improves its service life. Multiple sets of heating wires 105 are arranged on the outer side of the muffle tank 101 along its length. An inlet sealing chamber 106 and an outlet sealing chamber 107 are fixedly arranged at the bottom and top of the furnace shell 103, respectively. The inlet sealing chamber 106 and the outlet sealing chamber 107 are respectively provided with a strip inlet and a strip outlet. A pair of sealing rollers 108 are rotatably arranged at the strip inlet of the inlet sealing chamber 106 and the strip outlet of the outlet sealing chamber 107. A furnace body support 109 is fixedly arranged around the furnace shell 103. The furnace body support 109 is fixed to the furnace shell 103 by two sets of rigid supports 110. One side of the furnace shell 103 is connected to the molecular pump 111 and the gas inlet 112 by a steel pipe. The other side of the furnace shell 103 is provided with a gas outlet 113. Gas valves are provided on the pipes where the molecular pump 111, the gas inlet 112 and the gas outlet 113 are located. By switching the valves on the gas outlet 113, gas inlet 112, and molecular pump 111, the vacuum annealing and atmosphere annealing in the muffle furnace can be switched between each other.

[0042] Each tension measuring device 2 includes a tension measuring roller 201 and a tension sensor 202. The tension measuring roller 201 at the top of the furnace body device 1 is mounted on the top of the furnace body support 109 via the tension sensor 202, and the tension measuring roller 201 at the bottom of the furnace body device 1 is mounted on the top of the equipment base plate 3 via the tension sensor 202. By setting tension measuring rollers 201 at the inlet and outlet of the furnace body device 1, the tension of the strip inside the furnace body is accurately measured and controlled, thereby improving the annealing quality of ultra-thin metal strips.

[0043] The unwinding device 4 includes an unwinding drum 401, an unwinding gearbox 402, and an unwinding motor 403. The output end of the unwinding gearbox 402 is connected to the unwinding drum 401, and the input end is connected to the unwinding motor 403.

[0044] The straightening device 5 includes a straightening support 501, straightening rollers 502, and a hydraulic support 503. The straightening support 502 is fixedly mounted on the top of the equipment base plate 3, and seven straightening rollers 502 are movably connected inside the straightening support 501 via the hydraulic support 503. The annealed ultra-thin metal strip is straightened by the seven straightening rollers 502 to improve the strip shape quality.

[0045] The web guiding device 6 includes a web guiding roller 601, two web guiding tracks 602, and a web guiding motor 603. The web guiding roller 601 is slidably connected to the two web guiding tracks 602 via bearing seats. The positions of the bearing seats in the two web guiding tracks 602 are controlled by the connected web guiding motor 603. The web guiding roller 601 promptly controls the metal strip to the center position of the process line, preventing the ultra-thin metal strip from developing increased winding misalignment due to eccentricity. Excessive eccentricity can even cause sheet shape defects such as ribs and creasing in the ultra-thin metal strip.

[0046] The winding device 8 includes a winding drum 801, a winding gearbox 802, and a winding motor 803. The output end of the winding gearbox 802 is connected to the winding drum 801, and the input end is connected to the winding motor 803.

[0047] The tension measuring roller 201, the correction roller 601, and the direction roller 7 are all convex rollers. Because the metal strip is very thin, it is easy to cause defects such as creases and ribs when passing through the rollers at speed. Using convex rollers can effectively reduce the shape defects of the metal strip.

[0048] The operating method of this vertical annealing equipment for ultra-thin metal strips includes the following steps:

[0049] S1. Strip threading:

[0050] The coiled ultra-thin metal strip to be annealed is placed and fixed on the unwinding drum 401. The movable end of the coiled ultra-thin metal strip is welded to the guide strip. The guide strip presses the ultra-thin metal strip to be annealed... Figure 3 Thread the strap as shown.

[0051] First, it passes through the tension measuring roller 201 at the bottom of the furnace body device 1, then passes through the middle of a pair of sealing rollers 108 in the inlet sealing chamber 106 to enter the muffle tank 101, passes through the middle of a pair of sealing rollers 108 in the outlet sealing chamber 107, goes around the top of the tension measuring roller 201 at the top of the furnace body device 1, goes around the top of the correction roller 601, enters the seven straightening rollers 502 for thin strip straightening, and finally goes around the direction roller 7 and is wound onto the take-up drum 801.

[0052] Start the winding motor 803 to transfer the ultra-thin metal strip into the furnace body device 1 and wait for annealing.

[0053] S2. Annealing state selection and adjustment:

[0054] Vacuum annealing: Close the gas inlet and gas outlet valves; start the molecular pump to completely extract the gas inside the entire furnace shell, creating a vacuum inside the muffle tank; close the valve on the molecular pump, and then turn off the molecular pump.

[0055] Atmosphere annealing: Following the vacuum annealing method, after evacuating the inside of the furnace shell to a vacuum, open the gas inlet valve to allow the atmosphere gas to enter the furnace shell; once the gas pressure inside the furnace shell reaches 0.5MPa, open the gas outlet valve to allow the atmosphere gas to enter the gas post-processing device along the gas outlet; during the annealing process, it is necessary to continuously circulate gas through the gas inlet until the annealing is completed.

[0056] S3, Annealing execution:

[0057] S31. Start the heating wire 105 to bring the temperature inside the muffle can 101 to the preset temperature for annealing the metal ultrathin strip.

[0058] S32. Strip Running Control: After reaching the set temperature, the unwinding motor 403 and the winding motor 803 are started to bring the ultra-thin metal strip to the preset speed and tension. Through real-time online feedback from the tension measuring roller 201, the unwinding motor 403 and the winding motor 803 are adjusted promptly to ensure stable tension of the ultra-thin metal strip within the muffle tank 101. The ultra-thin metal strip passes through the correction roller 601 and the straightening roller 502 to ensure minimal strip roll misalignment during winding, reducing defects such as ribs and creasing.

[0059] S4. Annealing completed and subsequent processing:

[0060] After the entire roll of ultra-thin metal strip has been annealed, stop the machine. Cut the ultra-thin metal strip at the unwinding drum 401 and the take-up drum 801. The section of ultra-thin metal strip remaining in the equipment will be used as the guide for the next roll. Remove the annealed ultra-thin metal strip from the take-up drum 801, label it, and store it in the warehouse.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A metal strip in extreme thin gauge vertical annealing apparatus characterized by, include: The furnace body assembly includes a muffle tank and a furnace shell. Multiple sets of elastic supports, fixedly connected to the furnace shell, are arranged on the outer side of the muffle tank along its length. The top of the muffle tank is fixedly connected to the top of the inner side of the furnace shell via a top elastic support. A molecular pump and a gas inlet are connected to one side of the furnace shell via steel pipes, and a gas outlet is provided on the other side of the furnace shell. Gas valves are installed on the pipes connecting the molecular pump, gas inlet, and gas outlet. Tension measuring devices are respectively installed at the top and bottom of the furnace body assembly; An unwinding device and a rewinding device are respectively arranged on both sides of the furnace body device; A directional roller, located between the winding device and the furnace body device; A straightening device and a correction device are sequentially arranged on the upper part of the directional roller; wherein the straightening device includes multiple straightening rollers for straightening the strip.

2. A metal strip of record thin gauge vertical annealing apparatus as claimed in claim 1 wherein, The furnace body, unwinding device, winding device, and directional rollers are all mounted on the same equipment base plate, and the surface of the muffle furnace adopts a ribbed structure.

3. A metal strip in a vertical annealing installation according to claim 2, characterized in that The furnace body device also includes heating wires, an inlet sealing chamber, an outlet sealing chamber, sealing rollers, a furnace body support, and rigid supports; multiple sets of heating wires are arranged on the outer side of the muffle can along its length; an inlet sealing chamber and an outlet sealing chamber are respectively arranged at the bottom and top of the furnace body shell; the inlet sealing chamber and the outlet sealing chamber are respectively provided with a strip inlet and a strip outlet; a pair of sealing rollers are rotatably arranged at both the strip inlet and the strip outlet; a furnace body support is fixedly arranged around the furnace body shell; the furnace body support is fixed to the furnace body shell by two sets of rigid supports.

4. A metal strip thin strip vertical annealing apparatus as claimed in claim 3, characterized in that, Each tension measuring device includes a tension measuring roller and a tension sensor. The tension measuring rollers are respectively installed at the strip inlet and strip outlet. The tension measuring roller at the top of the furnace body is fixed to the furnace body support by a tension sensor, and the tension measuring roller at the bottom of the furnace body is fixed to the top of the equipment base plate by a tension sensor.

5. A metal strip thin strip vertical annealing apparatus as claimed in claim 1, characterized in that, The unwinding device includes an unwinding drum, an unwinding gearbox, and an unwinding motor. The output end of the unwinding gearbox is connected to the unwinding drum, and its input end is connected to the unwinding motor.

6. A metal strip thin strip vertical annealing apparatus as claimed in claim 1, characterized in that, The straightening device also includes a straightening bracket and a hydraulic bracket. The straightening bracket is fixedly installed on the top of the equipment base plate, and the straightening roller is movably connected inside the straightening bracket through the hydraulic bracket.

7. A metal strip thin strip vertical annealing apparatus as claimed in claim 4, characterized in that, The correction device includes a correction roller, two correction tracks, and a correction motor. The correction roller is slidably connected to the two correction tracks via bearing seats. The positions of the bearing seats in the two correction tracks are controlled by the correction motor connected to them.

8. A metal strip thin strip vertical annealing apparatus as claimed in claim 1, characterized in that, The winding device includes a winding drum, a winding gearbox, and a winding motor, wherein the output end of the winding gearbox is connected to the winding drum, and its input end is connected to the winding motor.

9. A metal strip thin strip vertical annealing apparatus as claimed in claim 7, characterized in that, The tension measuring roller, the correction roller, and the direction roller are all convex rollers.

10. A metal strip thin strip vertical annealing apparatus as claimed in claim 1, characterized in that, The straightening rollers are provided in seven units; the furnace body device, tension measuring device, unwinding device, straightening device, correction device and directional rollers are all covered by the same equipment housing.

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