Stress relief annealing furnace for precisely regulating and controlling tension of multi-specification metal ultra-thin strips

Abstract

The invention relates to a stress relief annealing furnace capable of precisely regulating and controlling tension of multi-specification metal ultra-thin strips, and belongs to the technical field of metal ultra-thin strip hot working, the stress relief annealing furnace comprises an annealing furnace box body, a front guide pre-tightening device and a rear guide pre-tightening device, the front guide pre-tightening device and the rear guide pre-tightening device are arranged on the two sides of the annealing furnace box body respectively, and an unwinding device is arranged at the end, away from the annealing furnace box body, of the front guide pre-tightening device; a winding device is arranged at one end, far away from the annealing furnace box body, of the rear guide pre-tightening device; the front guide pre-tightening device comprises a tension regulating roller I, a tension sensor I, a tension regulating roller bracket I, an adjusting screw rod I and a tension control motor I; the rear guide pre-tightening device comprises a second tension adjusting and controlling roller, a second tension adjusting and controlling roller support, a third adjusting screw rod, a second tension control motor and a second tension sensor. The unwinding device and the winding device are each provided with a large winding drum and a small winding drum, application of the metal ultra-thin strips of different specifications and inner diameters is met, the tension of the metal ultra-thin strips is detected and adjusted in real time through the tension sensor, and accurate control over the tension in the annealing process is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of hot processing of ultra-thin metal strips and relates to a stress relief annealing furnace for precisely controlling the tension of ultra-thin metal strips of various specifications. Background Art

[0002] Annealing technology is a key link in the processing of metal materials. Its main purpose is to improve the microstructure and properties of ultra-thin metal strips through heat treatment to meet specific application requirements. Ultra-thin metal strips usually undergo large plastic cold rolling deformation during the production process, which causes work hardening inside the metal, resulting in reduced plasticity and increased brittleness of the material; at the same time, large plastic deformation will cause the grains inside the material to be elongated and the number of dislocations inside the grains to increase, thereby affecting the material's electrical conductivity, thermal conductivity and corrosion resistance, etc., which is not conducive to the application of ultra-thin metal strips. In order to eliminate these adverse effects, annealing treatment becomes a necessary process link. The ultra-thin metal strip is heated to an appropriate temperature and maintained for a certain period of time so that the atoms inside the metal can obtain enough energy to rearrange, thereby eliminating work hardening and improving its mechanical and physical properties.

[0003] In the rolling process of ultra-thin metal strips, due to the large thickness span, in order to ensure the stability of the strip quality, multiple annealing passes are required during the complete rolling process. However, due to the performance limitations of the commonly used rolling equipment on the market, ultra-thin metal strips of different specifications require multiple rolling equipment of different models to complete. The coiling specifications and inner diameters of different rolling equipment are also different. Relatively speaking, large rolls are mostly used for relatively thick ultra-thin metal strips, and small rolls are used for thinner ultra-thin metal strips. In addition, most of the finished ultra-thin strips are used in electronic products. Electronic product manufacturers commonly use small roll sizes for inner diameters. At the same time, according to the processing requirements of ultra-thin metal strips, the process of choosing further rolling after annealing or annealing to become a finished product is different. There is often an additional step of rewinding after annealing, which undoubtedly reduces production efficiency.

[0004] In addition, due to its extremely thin thickness, the precise control of tension during stress relief annealing is extremely important. Reasonable control of tension can not only reduce the buckling and instability of the strip, improve the shape and dimensional accuracy of the strip, but also optimize the internal stress distribution of the strip, promote the recrystallization process, and improve the microstructure and surface quality of the metal strip. However, there is little annealing equipment for metal strips below 0.03mm in the domestic market, and corresponding metal strip annealing equipment is urgently needed to meet the above needs.

[0005] Based on this, the present invention proposes a stress relief annealing furnace with precise tension control for ultra-thin metal strips of various specifications, which can meet the application scenarios of ultra-thin metal strips of various specifications and inner diameters and the precise control of the tension of ultra-thin metal strips in the annealing furnace. Summary of the invention

[0006] In view of this, in order to solve the above-mentioned technical problems, the present invention provides a stress relief annealing furnace with precise tension control for ultra-thin metal strips of multiple specifications. The annealing furnace can realize real-time and precise tension control of the ultra-thin metal strips during the stress relief annealing process, improve the shape and dimensional accuracy of the strips, optimize the internal stress distribution of the strips, and simultaneously realize rewinding of ultra-thin metal strips of different specifications and inner diameters, thereby improving the microstructure and surface quality of the ultra-thin metal strips and improving the production efficiency of the ultra-thin metal strips.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications, comprising an annealing furnace box and a leading pre-tightening device and a trailing pre-tightening device respectively arranged on both sides of the annealing furnace box, an unwinding device being arranged at one end of the leading pre-tightening device away from the annealing furnace box, and a winding device being arranged at one end of the trailing pre-tightening device away from the annealing furnace box;

[0009] The leading pre-tightening device comprises a tension regulating roller, a tension sensor, a tension regulating roller bracket, an adjusting screw and a tension control motor; an adjusting screw is fixedly arranged at the bottom of both ends of the tension regulating roller inside the tension regulating roller bracket, and one end of the adjusting screw is fixedly connected to the output shaft of the tension control motor;

[0010] The rear guide pre-tightening device comprises a tension regulating roller 2, a tension regulating roller bracket 2, an adjusting screw 3, a tension control motor 2 and a tension sensor 2; an adjusting screw 3 is fixedly arranged at the bottom of both ends of the tension regulating roller 2 inside the tension regulating roller bracket 2, and one end of the adjusting screw 3 is fixedly connected to the output shaft of the tension control motor 2;

[0011] Both the unwinding device and the rewinding device are provided with a large reel and a small reel.

[0012] Furthermore, the annealing furnace box includes a heating furnace body, an inlet sealed cavity, an outlet cooling cavity, a heating furnace body shell, an insulation layer, a furnace chamber, a heating resistor wire, an air inlet, a sealed cavity shell, a sealing roller one, a wool felt, a cooling cavity shell, a sealing roller two, a cooling air outlet, a circulating gas cooler and a correction sensor, wherein the inlet sealed cavity and the outlet cooling cavity are fixedly arranged on both sides of the heating furnace body, the heating furnace body shell serves as a support for the heating furnace body, a furnace chamber is fixedly arranged at the inner center of the heating furnace body shell through the insulation layer, a plurality of groups of heating resistor wires are evenly and symmetrically arranged at the top and bottom of the furnace chamber, a plurality of groups of air inlets are fixedly arranged at the top of the furnace chamber, and the air inlets and the heating resistor wires are staggered, the sealed cavity shell serves as a support for the inlet sealed cavity, a pair of sealing rollers two are rollingly arranged on the side of the cooling cavity shell close to the heating furnace body, a plurality of cooling air outlets are fixedly arranged on the top and bottom of the cooling cavity shell, the cooling air outlet is driven by circulating cold air through a circulating gas cooler fixedly arranged on the outer top of the outlet cooling cavity, and a correction sensor is fixedly arranged on the side of the outer side of the cooling cavity shell away from the heating furnace body.

[0013] Furthermore, the leading preload device also includes a leading preload base, a guide roller 1, an S roller 1, an S roller 2, a direction roller 1, a direction roller 2, a guide roller bracket 1, a guide roller control panel 1, a pneumatic controller 1 and a motor bracket 1; wherein, a pair of guide rollers 1, S rollers 1, S rollers 2, direction rollers 1, tension regulating rollers 1 and direction rollers 2 are sequentially arranged on the top of the leading preload base from one end away from the heating furnace body to the other end; S rollers 1, S rollers 2 and direction rollers 2 are fixedly connected to the top of the leading preload base through bearing seats; guide roller 1 is fixedly connected to the leading preload base through guide roller bracket 1 The top of the guide roller bracket is rotatably provided with a guide roller control disk, which controls the position height of the guide roller by controlling the screw, the two ends of the direction roller are fixedly provided on the top of the two tension sensors through the bearing seat, the bottom of the tension sensor is fixedly provided on the top of the leading preload base, the tension regulating roller is fixedly provided on the top of the leading preload base through the tension regulating roller bracket, a pneumatic controller is fixedly provided on the top of the two ends of the tension regulating roller inside the tension regulating roller bracket, and the bottom of the tension control motor is fixedly connected with a motor bracket.

[0014] Furthermore, the rear guide pre-tightening device also includes: a rear guide pre-tightening base, a deviation correction roller, a third direction roller, a third S roller, a fourth S roller, a second guide roller, a deviation correction track, a second adjusting screw, a deviation correction motor used in conjunction with a deviation correction sensor, a deviation correction motor base, a second pneumatic controller, a second motor bracket, a second guide roller bracket and a second guide roller control disk; wherein, the top of the rear guide pre-tightening base is provided with a deviation correction roller, a second tension regulating roller, a third direction roller, a third S roller, a fourth S roller and a pair of second guide rollers in sequence from one end close to the heating furnace body to the other end thereof; the third S roller and the fourth S roller are fixedly connected to the top of the rear guide pre-tightening base through a bearing seat; the deviation correction roller is slidably connected to the inside of the deviation correction track through the bearing seat, and an adjusting screw second is provided inside the deviation correction track, and one end of the adjusting screw second is fixedly connected to the It is connected to the output end of the deviation correction motor, and a deviation correction motor base is fixedly arranged at the bottom of the deviation correction motor; the tension control roller 2 is fixedly arranged on the top of the rear guide preload base through the tension control roller bracket 2, and the pneumatic controller 2 is fixedly arranged on the top of the two ends of the tension control roller 2 inside the tension control roller bracket 2, and the motor bracket 2 is fixedly connected to the bottom of the tension control motor 2; the two ends of the direction roller 3 are fixedly arranged on the top of the two tension sensors 2 through the bearing seat, and the bottom of the tension sensor 2 is fixedly arranged on the top of the rear guide preload base; the guide roller 2 is fixedly connected to the top of the rear guide preload base through the guide roller bracket 2, and the top of the guide roller bracket 2 is rotatably provided with a guide roller control disk 2, and the guide roller control disk 2 controls the position height of the guide roller 2 through the control screw.

[0015] Furthermore, when the metal strip passes through the deviation sensor, the system determines the edge position of the strip and performs feedback control on the deviation correction motor through an algorithm. The deviation correction motor controls the rotation of the adjusting screw 2, and then controls the position of the deviation correction roller to correct the deviation of the metal strip.

[0016] Furthermore, the metal strip is passed through S roller 2, S roller 1, S roller 4 and S roller 3 in an "S" shape.

[0017] Furthermore, the tension control motor 1 and the tension control motor 2 both use high-precision, timely-response servo motors.

[0018] Furthermore, the unwinding device includes an unwinding base, a large reel diameter reducer box 1, an unwinding motor 1, a large reel 1, a small reel diameter reducer box 1, an unwinding motor 2 and a small reel 1; wherein, a large reel diameter reducer box 1 is fixedly arranged in the center of the top of the unwinding base, and the input end and output end of the large reel diameter reducer box 1 are respectively fixedly connected to the unwinding motor 1 and the large reel 1; a small reel diameter reducer box 1 is fixedly arranged on the top of the large reel diameter reducer box 1, and the input end and output end of the small reel diameter reducer box 1 are respectively fixedly connected to the unwinding motor 2 and the small reel 1.

[0019] Furthermore, the winding device includes a winding base, a large winding diameter reducer box 2, a winding motor 1, a large reel 2, a small winding diameter reducer box 2, a winding motor 2 and a small reel 2; wherein, a large winding diameter reducer box 2 is fixedly arranged in the center of the top of the winding base, and the input end and output end of the large winding diameter reducer box 2 are respectively fixedly connected to the winding motor 1 and the large reel 2; a small winding diameter reducer box 2 is fixedly arranged on the top of the large winding diameter reducer box 2, and the input end and output end of the small winding diameter reducer box 2 are respectively fixedly connected to the winding motor 2 and the small reel 2.

[0020] Furthermore, the lengths of the large and small reels are both 400-500 mm, the maximum annealing speed of the annealing furnace is 30 m / min, the large reel is a mechanical expansion shaft with an inner diameter of 250-340 mm, and the small reel is a pneumatic expansion shaft with an inner diameter of 70-90 mm.

[0021] The beneficial effects of the present invention are:

[0022] 1. The invention discloses a stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications. The tension sensors arranged on the leading pre-tightening device and the trailing pre-tightening device of the annealing furnace box detect the tension change of the ultra-thin metal strip inside the annealing furnace box in real time, and feed back to the tension control motor through system control. The tension control motor adjusts the height of the tension control roller in real time under the joint action of the screw and the pneumatic controller, so that the tension of the ultra-thin metal strip inside the annealing furnace box is kept within a very small error range, thereby realizing real-time and precise tension control of the ultra-thin metal strip during stress relief annealing, improving the shape and dimensional accuracy of the strip, optimizing the internal stress distribution of the strip, promoting the recrystallization process, and improving the microstructure and surface quality of the ultra-thin metal strip.

[0023] 2. The stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications disclosed in the present invention uses a mechanical expansion shaft large reel and a gas expansion small reel arranged on the unwinding device and the winding device to achieve ultra-thin metal strips of different specifications and inner diameters on the unwinding device being annealed using a large reel or a small reel and then being rewound onto a large reel or a small reel of the winding device for further fine rolling or rewinding into finished products, thereby reducing the rewinding steps and improving the production efficiency of ultra-thin metal strips.

[0024] 3. The stress-relieving annealing furnace for precise tension control of multi-specification ultra-thin metal strips disclosed in the present invention detects the edge position of the ultra-thin metal strip through a correction sensor and controls the correction roller of the correction motor through a screw to realize online correction of the ultra-thin metal strip, thereby reducing the stacking errors of the ultra-thin metal strip on the large reel or small reel of the winding device, which is beneficial to the next step of rolling or the neatness of the edge of the finished strip; two groups of S rollers arranged on the top of the leading pre-tightening device and the rear leading pre-tightening device can prevent the ultra-thin metal strip from wrinkling before entering the annealing furnace box and before being rewound onto the reel of the winding device, thereby reducing the generation of defective products and improving the yield rate.

[0025] 4. The stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips disclosed in the present invention removes moisture and impurities on the surface of the ultra-thin metal strips through the wool felt in the entrance sealing chamber, controls the furnace temperature through multiple groups of heating resistance wires and insulation layers along the furnace, and introduces hydrogen through multiple groups of air inlets to achieve bright annealing of the ultra-thin metal strips in the heating furnace body, thereby ensuring the annealing quality of the ultra-thin metal strips.

[0026] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 It is a schematic structural diagram of a stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications according to the present invention;

[0029] Figure 2 The internal structure of the annealing furnace box and the belt threading diagram in the stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips of the present invention;

[0030] Figure 3 It is a front view of the stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips of the present invention;

[0031] Figure 4 A top view of the stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications according to the present invention;

[0032] Figure 5 It is a tension regulating roller of a leading pre-tightening device in a stress relief annealing furnace for precise tension regulation of ultra-thin metal strips of various specifications according to the present invention;

[0033] Figure 6 It is a deviation correcting roller of a rear guide pre-tightening device in a stress relief annealing furnace for precise tension control of extremely thin metal strips of various specifications according to the present invention.

[0034] Figure numerals: 1. Annealing furnace box; 101. Heating furnace body; 102. Inlet sealing chamber; 103. Outlet cooling chamber; 104. Heating furnace body shell; 105. Insulation layer; 106. Furnace; 107. Heating resistance wire; 108. Air inlet; 109. Sealing chamber shell; 110. Sealing roller one; 111. Wool felt; 112. Cooling chamber shell; 113. Sealing roller two; 114. Cooling air outlet; 115. Circulating gas cooler; 116. Correction sensor; 2. Leading preload device ; 201, front guide preload base; 202, guide roller 1; 203, S roller 1; 204, S roller 2; 205, direction roller 1; 206, tension control roller 1; 207, direction roller 2; 208, guide roller bracket 1; 209, guide roller control plate 1; 210, tension sensor 1; 211, tension control roller bracket 1; 212, pneumatic controller 1; 213, adjustment screw 1; 214, tension control motor 1; 215, motor bracket 1; 3, rear guide preload device; 301, rear guide Preload base; 302, deviation correction roller; 303, tension control roller 2; 304, direction roller 3; 305, S roller 3; 306, S roller 4; 307, guide roller 2; 308, deviation correction track; 309, adjustment screw 2; 310, deviation correction motor; 311, deviation correction motor base; 312, tension control roller bracket 2; 313, pneumatic controller 2; 314, adjustment screw 3; 315, tension control motor 2; 316, motor bracket 2; 317, tension sensor 2; 318, guide roller Bracket 2; 319, guide roller control disk 2; 4, unwinding device; 401, unwinding base; 402, large reel diameter reduction box 1; 403, unwinding motor 1; 404, large reel 1; 405, small reel diameter reduction box 1; 406, unwinding motor 2; 407, small reel 1; 5, winding device; 501, winding base; 502, large reel diameter reduction box 2; 503, winding motor 1; 504, large reel 2; 505, small reel diameter reduction box 2; 506, winding motor 2; 507, small reel 2. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which 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 operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] like Figure 1-Figure 6 The illustrated embodiment shows a stress-relieving annealing furnace for precisely controlling the tension of ultra-thin metal strips of various specifications, comprising an annealing furnace body 1 and a leading pretensioning device 2 and a trailing pretensioning device 3 respectively arranged on both sides of the annealing furnace body 1, a unwinding device 4 being arranged at the end of the leading pretensioning device 2 away from the annealing furnace body 1, and a winding device 5 being arranged at the end of the trailing pretensioning device 3 away from the annealing furnace body 1.

[0039] The annealing furnace box 1 is composed of a heating furnace body 101, an inlet sealed cavity 102, an outlet cooling cavity 103, a heating furnace body shell 104, an insulation layer 105, a furnace 106, a heating resistor 107, an air inlet 108, a sealed cavity shell 109, a sealing roller 110, a wool felt 111, a cooling cavity shell 112, a sealing roller 2 113, a cooling tuyere 114, a circulating gas cooler 115, and a deviation correction sensor 116; wherein, the inlet sealed cavity 102 and the outlet cooling cavity 103 are fixedly provided on both sides of the heating furnace body 101, the heating furnace body 101 is supported by the heating furnace body shell 104, a furnace 106 is fixedly provided in the center of the inner part of the heating furnace body shell 104 through the insulation layer 105, a plurality of groups of heating resistors 107 are evenly and symmetrically provided on the top and bottom of the furnace 106, and a plurality of groups of inlet The air inlet 108 and the air inlet 108 and the heating resistor wire 107 are arranged alternately; the inlet sealed chamber 102 is supported by a sealed chamber shell 109, a pair of sealing rollers 110 are rolled on the side of the sealed chamber shell 109 close to the heating furnace body 101, and a wool felt 111 is arranged at the entrance of the other side of the sealed chamber shell 109; the outlet cooling chamber 103 is supported by a cooling chamber shell 112, a pair of sealing rollers 113 are rolled on the side of the cooling chamber shell 112 close to the heating furnace body 101, a plurality of cooling air outlets 114 are fixedly arranged on the top and bottom of the cooling chamber shell 112, the cooling air outlets 114 are driven by circulating cold air through a circulating gas cooler 115 fixedly arranged on the top of the outside of the outlet cooling chamber 103, and a correction sensor 116 is fixedly arranged on the side of the outside of the cooling chamber shell 112 away from the heating furnace body 101.

[0040] When the metal ultra-thin strip enters the annealing furnace box 1, it first passes through the wool felt 111 at the entrance of the entrance sealing chamber 102 to remove surface moisture and other rolling, and then enters the furnace 106 for annealing through the passively rotating sealing roller 110. The heating temperature is provided by multiple groups of heating resistance wires 107 arranged at the top and bottom of the furnace 106. The heating temperature in the furnace 106 is controlled to be 600~1250℃. At the same time, high-purity hydrogen is continuously introduced through the air inlet 108 to perform bright annealing on the metal ultra-thin strip. After the annealing of the metal ultra-thin strip is completed, it enters the outlet cooling chamber 103 through the passively rotating sealing roller 113. The circulating cold air produced by the circulating gas cooler 115 passes through the cooling air outlet 114 to quickly cool the metal ultra-thin strip to 30~80℃. Rapid cooling can refine the grains and form a more uniform organizational structure, while reducing residual stress and preventing material deformation and cracking.

[0041] The leading pretensioning device 2 includes a leading pretensioning base 201, a guide roller 202, an S roller 203, an S roller 204, a direction roller 205, a tension regulating roller 206, a direction roller 207, a guide roller bracket 208, a guide roller control disk 209, a tension sensor 210, a tension regulating roller bracket 211, a pneumatic controller 212, an adjusting screw 213, a tension control motor 214 and a motor bracket 215. Among them, a pair of guide rollers 202, S rollers 203, S rollers 204, direction rollers 205, tension regulating rollers 206, and direction rollers 207 are sequentially arranged on the top of the leading pretightening base 201 from one end away from the heating furnace body 101 to the other end; S rollers 203, S rollers 204, and direction rollers 207 are fixedly connected to the top of the leading pretightening base 201 through bearing seats; guide roller 202 is fixedly connected to the top of the leading pretightening base 201 through guide roller bracket 208, and a guide roller control disk 209 is rotatably arranged on the top of the guide roller bracket 208, and the guide roller control disk 209 controls the position height of the guide roller 202 by controlling the screw The two ends of the direction roller 205 are fixedly arranged on the top of the two tension sensors 210 through the bearing seats, and the bottom of the tension sensor 210 is fixedly arranged on the top of the leading preload base 201; the tension control roller 206 is fixedly arranged on the top of the leading preload base 201 through the tension control roller bracket 211, and the pneumatic controller 212 is fixedly arranged on the top of the two ends of the tension control roller 206 inside the tension control roller bracket 211, and the adjusting screw 213 is fixedly arranged on the bottom, one end of the adjusting screw 213 is fixedly connected to the output shaft of the tension control motor 214, and the bottom of the tension control motor 214 is fixedly connected to the motor bracket 215.

[0042] The rear guide pre-tightening device 3 includes a rear guide pre-tightening base 301, a deviation correction roller 302, a tension control roller 2 303, a direction roller 304, an S roller 305, an S roller 4 306, a guide roller 2 307, a deviation correction track 308, an adjusting screw 2 309, a deviation correction motor 310 used in conjunction with the deviation correction sensor 116, a deviation correction motor base 311, a tension control roller bracket 2 312, a pneumatic controller 2 313, an adjusting screw 314, a tension control motor 2 315, a motor bracket 2 316, a tension sensor 2 317, a guide roller bracket 2 318 and a guide roller control disk 2 319. Among them, the top of the rear guide pretightening base 301 is sequentially provided with a correction roller 302, a tension control roller 2 303, a direction roller 304, an S roller 305, an S roller 4 306, and a pair of guide rollers 2 307 from one end close to the heating furnace body 101 to the other end; the S roller 305 and the S roller 4 306 are fixedly connected to the top of the rear guide pretightening base 301 through a bearing seat; the correction roller 302 is slidably connected to the inside of the track of the correction track 308 through the bearing seat, and an adjusting screw 2 309 is arranged inside the correction track 308, and one end of the adjusting screw 2 309 is fixedly connected to the output end of the correction motor 310, and a correction motor base 311 is fixedly arranged at the bottom of the correction motor 310; the tension control roller 2 303 is fixedly arranged on the top of the rear guide pretightening base 301 through the tension control roller bracket 2 312, and the tension control roller 2 303 is fixedly arranged on the top of the rear guide pretightening base 301 through the tension control roller bracket 2 312. A pneumatic controller 2 313 is fixedly provided at the top of both ends of the tension regulating roller 2 303 inside the bracket 2 312, and an adjusting screw 3 314 is fixedly provided at the bottom, one end of the adjusting screw 314 is fixedly connected to the output shaft of the tension control motor 2 315, and the bottom of the tension control motor 2 315 is fixedly connected to the motor bracket 2 316; the two ends of the direction roller 304 are fixedly provided on the top of two tension sensors 2 317 through bearing seats, and the bottom of the tension sensor 2 317 is fixedly provided on the top of the rear guide preload base 301; the guide roller 2 307 is fixedly connected to the top of the rear guide preload base 301 through the guide roller bracket 2 318, and the top of the guide roller bracket 2 318 is rotatably provided with a guide roller control disk 2 319, and the guide roller control disk 2 319 controls the position height of the guide roller 2 307 through the control screw.

[0043] When the metal strip passes through the deflection correction sensor 116, the system determines the edge position of the strip and performs feedback control on the deflection correction motor 310 through an algorithm. The deflection correction motor 310 controls the rotation of the adjusting screw 2 309, and further controls the position of the deflection correction roller 302 to correct the metal strip so that the final curled strip is neatly layered. Feedback control through an algorithm is a conventional technology.

[0044] The real-time tension values ​​of the tension sensor 1 210 and the tension sensor 2 317 are used to control the tension control motor 1 214 and the tension control motor 2 315 respectively through the system algorithm, wherein the tension control motor 1 214 and the tension control motor 2 315 both use high-precision, timely-response servo motors, and the tension control motor 1 214 and the tension control motor 2 315 further precisely control and adjust the heights of the tension control roller 1 206 and the tension control roller 2 303 through the adjusting screw 1 213 and the adjusting screw 2 314, so that the tension of the metal strip is precisely controlled when passing through the annealing furnace box 1, and the tension of the metal ultra-thin strip inside the annealing furnace box is kept within a very small error range, thereby achieving real-time and precise control of the tension of the metal ultra-thin strip during stress relief annealing, improving the shape and dimensional accuracy of the strip, optimizing the internal stress distribution of the strip, promoting the recrystallization process, and improving the microstructure and surface quality of the metal ultra-thin strip, wherein the tension value is controlled by an algorithm as a conventional technology.

[0045] The unwinding device 4 includes an unwinding base 401, a large reel diameter reduction box 1 402, an unwinding motor 1 403, a large reel 1 404, a small reel diameter reduction box 1 405, an unwinding motor 2 406 and a small reel 1 407. Among them, a large reel diameter reduction box 1 402 is fixedly arranged at the center of the top of the unwinding base 401, and the input end and output end of the large reel diameter reduction box 1 402 are respectively fixedly connected to the unwinding motor 1 403 and the large reel 1 404; a small reel diameter reduction box 1 405 is fixedly arranged on the top of the large reel diameter reduction box 1 402, and the input end and output end of the small reel diameter reduction box 1 405 are both fixedly connected to the unwinding motor 2 406 and the small reel 1 407.

[0046] The winding device 5 comprises a winding base 501, a large winding diameter reduction box 2 502, a winding motor 1 503, a large reel 2 504, a small winding diameter reduction box 2 505, a winding motor 2 506 and a small reel 2 507. Among them, a large winding diameter reduction box 2 502 is fixedly arranged at the center of the top of the winding base 501, and the input end and output end of the large winding diameter reduction box 2 502 are both fixedly connected to the winding motor 1 503 and the large reel 2 504; a small winding diameter reduction box 2 505 is fixedly arranged on the top of the large winding diameter reduction box 2 502, and the input end and output end of the small winding diameter reduction box 2 505 are both fixedly connected to the winding motor 2 506 and the small reel 2 507.

[0047] The large reel in the unwinding device 4 and the rewinding device 5 is a mechanical expansion shaft that can fix the inner diameter of the coil with an inner diameter of 250~340mm, and the small reel is a pneumatic expansion shaft that can fix the inner diameter of the coil with an inner diameter of 70~90mm. The length of the large reel and the small reel in the unwinding device 4 and the rewinding device 5 is 400~500mm, and the maximum annealing speed of the entire annealing furnace is 30m / min.

[0048] When annealing extremely thin metal strips of different specifications and inner diameters, various forms of rewinding after annealing can be achieved. The specific embodiments are as follows:

[0049] The thickness of the metal ultra-thin strip ranges from 0.01mm to 0.05mm. According to the inner diameter of the strip coil of the metal ultra-thin strip rolling equipment commonly used in the market, the metal ultra-thin strip with a thickness of 0.02~0.05mm usually adopts an inner diameter of 280~310mm, and the metal ultra-thin strip with a thickness of 0.01~0.02mm usually adopts an inner diameter of 70~80mm. It is also possible to define the annealed strip with a thickness of 0.02~0.05mm as a finished product according to customer needs, and rewind the annealed 0.02~0.05mm thick strip into a specification inner diameter of 70~80mm; therefore, there will be the following three different annealing and rewinding states:

[0050] (1) The extremely thin metal strip with a thickness of 0.02-0.05 mm is further rolled after annealing, that is, the large reel 1 404 on the unwinding device 4 is annealed and then rewound to the large reel 2 504 on the winding device 5.

[0051] (2) The extremely thin metal strip with a thickness of 0.02-0.05 mm is annealed to become a finished product, that is, the large reel 1 404 on the unwinding device 4 is annealed and then rewound to the small reel 2 507 on the rewinding device 5.

[0052] (3) After annealing, the ultra-thin metal strip with a thickness of 0.01-0.02 mm is further rolled or becomes a finished product, that is, the small reel 1 407 on the unwinding device 4 is annealed and then rewound onto the small reel 2 507 on the rewinding device 5, thereby reducing the rewinding steps and improving the production efficiency of the ultra-thin metal strip.

[0053] According to the above situation (2), the 316L stainless steel ultra-thin strip with a specification of 0.03×280mm and an inner diameter of 308mm is annealed and then rewound into a 316L ultra-thin strip with a specification of 0.03×280mm and an inner diameter of 76mm. The 316L stainless steel ultra-thin strip with a specification of 0.03×280mm and an inner diameter of 308mm is placed on the large reel 1 404 of the unwinding device 4, and the large reel 1 404 is used to fix the rolled material tightly through a mechanical device, and the output end of the strip is connected to the lead belt by electric welding, and the winding motor 2 506 of the winding device 5 is started to roll the strip according to the reference Figure 2The strip is threaded by passing through a pair of guide rollers 203 on the leading preload device 2 in sequence, forming an "S" shape between S roller 204 and S roller 203 to prevent the strip from wrinkling, the top of direction roller 205, the bottom of tension regulating roller 206, and the top of direction roller 207 to enter the annealing furnace box 1, and the wool felt 111 at the entrance of the entrance sealing chamber 102 is used to remove moisture and impurities on the surface of the strip, and entering the heating furnace body 101 between a pair of sealing rollers 110, and after passing through the heating furnace body 101, it passes through a pair of sealing rollers 113, and passes through the center of the deviation correction sensor 116 to detect the edge position of the strip in real time. After passing through the annealing furnace box 1, it passes through the top of the deviation correction roller 302, the bottom of the tension control roller 2 303, the top of the direction roller 3 304, the S roller 4 306 and the S roller 3 305 in the "S" shape, and the middle of the pair of guide rollers 2 307 of the winding device 5, and finally connected to the small reel 2 507 of the winding device 5. The small reel 2 507 changes the inner diameter of the strip to 76mm by air expansion. After the strip is threaded in the above-mentioned threading method, the winding motor 2 506 continues to drive the small reel 2 507 to rotate several times, so that the 316L ultra-thin strip is wound around the small reel 2 507 for several times, and the guide roller 1 202 and the guide roller 2 207 are adjusted to the appropriate position through the guide roller control disk 1 209 and the guide roller control disk 2 319, so that when the strip enters the S roller, it is as flush with the ground as possible. The multiple groups of heating resistors 107 at the top and bottom of the furnace 106 are controlled to control the temperature of the furnace 106 at 1080°C. During this period, the air inlet 108 continuously introduces hydrogen into the furnace 106 to keep the furnace 106 in a full hydrogen environment. At the same time, the unwinding motor 1 403 of the unwinding device 4 and the winding motor 2 506 of the winding device 5 are started to anneal the 316L ultra-thin strip at a speed of 20m / min. Under the action of the unwinding motor 1 403 and the winding motor 2 506, the speed difference between the large reel 1 404 and the small reel 2 507 forms a tension of 160~180Kg in the heating furnace body 101. The real-time tension values ​​of the tension sensor 1 210 and the tension sensor 2 317 are respectively calculated by the system algorithm. The tension control motor 1 214 and the tension control motor 2 315 are controlled, and the tension control motor 1 214 and the tension control motor 2 315 further precisely control and adjust the height of the tension control roller 1 206 and the tension control roller 2 303 through the adjusting screw 1 213 and the adjusting screw 2 314, so that the tension of the metal strip is precisely controlled when passing through the annealing furnace box 1, reducing the above-mentioned tension error, and controlling the tension of the metal ultra-thin strip in the heating furnace body 101 to 169~171Kg. After high-temperature annealing, the 316L stainless steel ultra-thin strip is cooled to 50℃ by the cooling circulating cold air blown out from the cooling air outlet 114 of the outlet cooling chamber 103, and the annealing is completed. Finally, the correction roller 302 controlled by the correction sensor 116 is rewound onto the small reel 2 507, so that the layer fault of the rewound strip is less than 0.2mm.After the whole roll is annealed, the strip is cut, and the small roll 507 is deflated to take out the annealed 316L ultra-thin strip product with a specification of 0.03×280mm and an inner diameter of 76mm.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A stress relief annealing furnace for precise tension control of ultra-thin metal strips of various specifications, comprising an annealing furnace box and a leading pre-tightening device and a trailing pre-tightening device respectively arranged on both sides of the annealing furnace box, characterized in that: The end of the leading pre-tightening device away from the annealing furnace box is provided with an unwinding device, and the end of the trailing pre-tightening device away from the annealing furnace box is provided with a winding device; The leading pre-tightening device comprises a tension regulating roller, a tension sensor, a tension regulating roller bracket, an adjusting screw and a tension control motor; The adjusting screw 1 is fixedly arranged at the bottom of both ends of the tension regulating roller 1 inside the tension regulating roller bracket 1, and one end of the adjusting screw 1 is fixedly connected to the output shaft of the tension control motor 1; The rear guide pre-tightening device comprises a second tension regulating roller, a second tension regulating roller bracket, a third adjusting screw, a second tension control motor and a second tension sensor; The adjusting screw rod 3 is fixedly arranged at the bottom of both ends of the tension regulating roller 2 inside the tension regulating roller bracket 2, and one end of the adjusting screw rod 3 is fixedly connected to the output shaft of the tension control motor 2; The unwinding device and the rewinding device are both provided with a large reel and a small reel.

2. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 1, characterized in that: The annealing furnace box includes a heating furnace body, an inlet sealed cavity, an outlet cooling cavity, a heating furnace body shell, an insulation layer, a furnace chamber, a heating resistor wire, an air inlet, a sealed cavity shell, a sealing roller one, a wool felt, a cooling cavity shell, a sealing roller two, a cooling air outlet, a circulating gas cooler and a correction sensor, wherein the inlet sealed cavity and the outlet cooling cavity are fixedly arranged on both sides of the heating furnace body, the heating furnace body shell serves as a support for the heating furnace body, the furnace chamber is fixedly arranged at the inner center of the heating furnace body shell through the insulation layer, a plurality of groups of the heating resistor wires are evenly and symmetrically arranged at the top and bottom of the furnace chamber, a plurality of groups of the air inlets are fixedly arranged at the top of the furnace chamber, and the air inlets and the heating resistor wires are arranged alternately, the sealed cavity shell serves as a support for the inlet sealed cavity, a pair of the sealing roller two is rollingly arranged on the side of the cooling cavity shell close to the heating furnace body, a plurality of groups of the cooling air outlets are fixedly arranged on the top and bottom of the cooling cavity shell, the cooling air outlet is driven by circulating cold air through a circulating gas cooler fixedly arranged at the top of the outside of the outlet cooling cavity, and the correction sensor is fixedly arranged on the side of the outside of the cooling cavity shell away from the heating furnace body.

3. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 3, characterized in that: The leading pre-tightening device also includes a leading pre-tightening base, a guide roller 1, an S roller 1, an S roller 2, a direction roller 1, a direction roller 2, a guide roller bracket 1, a guide roller control panel 1, a pneumatic controller 1 and a motor bracket 1; wherein, a pair of guide roller 1, S roller 1, S roller 2, direction roller 1, tension regulating roller 1 and direction roller 2 are arranged in sequence on the top of the leading pre-tightening base from one end away from the heating furnace body to the other end; S roller 1, S roller 2 and direction roller 2 are fixedly connected to the top of the leading pre-tightening base through a bearing seat; guide roller 1 is fixedly connected to the top of the leading pre-tightening base through guide roller bracket 1 The guide roller control disk 1 is rotatably arranged on the top of the guide roller bracket 1, and the guide roller control disk 1 controls the position height of the guide roller 1 by controlling the screw, and the two ends of the direction roller 1 are fixedly arranged on the top of the two tension sensors 1 through the bearing seats, and the bottom of the tension sensor 1 is fixedly arranged on the top of the leading preload base, and the tension regulating roller 1 is fixedly arranged on the top of the leading preload base through the tension regulating roller bracket 1, and the pneumatic controller 1 is fixedly arranged on the top of the two ends of the tension regulating roller 1 inside the tension regulating roller bracket 1, and the motor bracket 1 is fixedly connected to the bottom of the tension control motor 1.

4. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 3, characterized in that: The rear guide pretightening device also includes: a rear guide pretightening base, a deviation correction roller, a third direction roller, a third S roller, a fourth S roller, a second guide roller, a deviation correction track, a second adjusting screw, a deviation correction motor used in conjunction with a deviation correction sensor, a deviation correction motor base, a second pneumatic controller, a second motor bracket, a second guide roller bracket and a second guide roller control disk; wherein, the top of the rear guide pretightening base is provided with a deviation correction roller, a second tension regulating roller, a third direction roller, a third S roller, a fourth S roller and a pair of the second guide rollers in sequence from one end close to the heating furnace body to the other end thereof; the third S roller and the fourth S roller are fixedly connected to the top of the rear guide pretightening base through a bearing seat; the deviation correction roller is slidably connected to the inside of the deviation correction track through the bearing seat, and the second adjusting screw is provided inside the deviation correction track, and one end of the second adjusting screw is fixedly connected to the correction At the output end of the deflection motor, the bottom of the deflection correction motor is fixedly provided with the deflection correction motor base; the tension control roller 2 is fixedly provided on the top of the rear guide preload base through the tension control roller bracket 2, and the pneumatic controller 2 is fixedly provided on the top of the two ends of the tension control roller 2 inside the tension control roller bracket 2, and the bottom of the tension control motor 2 is fixedly connected with the motor bracket 2; the two ends of the direction roller 3 are fixedly provided on the top of the two tension sensors 2 through the bearing seat, and the bottom of the tension sensor 2 is fixedly provided on the top of the rear guide preload base; the guide roller 2 is fixedly connected to the top of the rear guide preload base through the guide roller bracket 2, and the top of the guide roller bracket 2 is rotatably provided with the guide roller control disk 2, and the guide roller control disk 2 controls the position height of the guide roller 2 through the control screw.

5. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 4, characterized in that: When the metal strip passes through the deflection sensor, the system determines the edge position of the metal strip and performs feedback control on the deflection correction motor through an algorithm. The deflection correction motor controls the rotation of the adjusting screw 2, thereby controlling the position of the deflection correction roller to correct the metal strip.

6. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 5, characterized in that: The metal strip is passed through S roller two and S roller one as well as S roller four and S roller three in an "S" shape.

7. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 4, characterized in that: The tension control motor 1 and the tension control motor 2 both use high-precision, timely-response servo motors.

8. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 1, characterized in that: The unwinding device includes an unwinding base, a large-diameter reel reducer box 1, an unwinding motor 1, a large reel 1, a small-diameter reel reducer box 1, an unwinding motor 2 and a small reel 1; wherein the large-diameter reel reducer box 1 is fixedly arranged in the center of the top of the unwinding base, and the input end and the output end of the large-diameter reel reducer box 1 are respectively fixedly connected to the unwinding motor 1 and the large reel 1; the small-diameter reel reducer box 1 is fixedly arranged on the top of the large-diameter reel reducer box 1, and the input end and the output end of the small-diameter reel reducer box 1 are respectively fixedly connected to the unwinding motor 2 and the small reel 1.

9. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 8, characterized in that: The winding device includes a winding base, a large winding diameter reduction box 2, a winding motor 1, a large reel 2, a small winding diameter reduction box 2, a winding motor 2 and a small reel 2; wherein the large winding diameter reduction box 2 is fixedly arranged in the center of the top of the winding base, and the input end and the output end of the large winding diameter reduction box 2 are respectively fixedly connected to the winding motor 1 and the large reel 2; the small winding diameter reduction box 2 is fixedly arranged on the top of the large winding diameter reduction box 2, and the input end and the output end of the small winding diameter reduction box 2 are respectively fixedly connected to the winding motor 2 and the small reel 2.

10. A stress relief annealing furnace for precise tension control of multi-specification ultra-thin metal strips as claimed in claim 1, characterized in that: The lengths of the large reel and the small reel are both 400-500 mm, the maximum annealing speed of the annealing furnace is 30 m / min, the large reel is a mechanical expansion shaft with an inner diameter of 250-340 mm, and the small reel is a pneumatic expansion shaft with an inner diameter of 70-90 mm.

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