CN115747468A - Heat treatment production line for continuous heating and annealing of micro-tension ultrathin strip - Google Patents
Heat treatment production line for continuous heating and annealing of micro-tension ultrathin strip Download PDFInfo
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- CN115747468A CN115747468A CN202211506838.9A CN202211506838A CN115747468A CN 115747468 A CN115747468 A CN 115747468A CN 202211506838 A CN202211506838 A CN 202211506838A CN 115747468 A CN115747468 A CN 115747468A
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Abstract
The invention relates to a heat treatment production line for continuous heating and annealing of micro-tension ultrathin strips, which comprises a continuous heating and annealing furnace and a control system, wherein a feeding mechanism, a heating system, a cooling system and a discharging mechanism are arranged in the continuous heating and annealing furnace; the method is characterized in that: an internal circulation synchronous conveying structure is arranged in a process section of the continuous heating annealing furnace, the internal circulation synchronous conveying structure is formed by connecting a transmission mechanism and an internal circulation steel belt, the transmission mechanism drives the internal circulation conveying steel belt to synchronously pass through a heating system and a cooling system and continuously circulate and operate, so that the internal circulation conveying steel belt is supported and synchronously passes through the process section of the continuous heating annealing furnace with workpieces, and a micro-tension type workpiece conveying and supporting structure is formed; the control system controls the unwinding mechanism, the winding mechanism and the internal circulation conveying structure to synchronously operate, so that the running speed of the internal circulation conveying steel belt is the same as the advancing speed of the workpiece, and a synchronous control structure is formed. The device has the characteristics and the improvement of preventing the workpiece from being bent and pulled apart, preventing the workpiece from drooping and the like.
Description
Technical Field
The invention relates to a heat treatment production line for continuous heating and annealing of a micro-tension ultrathin strip, which is suitable for continuous bright annealing heat treatment of an ultrathin metal strip. Belongs to the technical field of heat treatment mechanical equipment manufacture.
Background
The ultrathin metal strip generally refers to a metal strip with the thickness of less than or equal to 0.3mm, and the product can be used in the industries of aerospace thermal insulation layers, electronic precision elements, automobile three-way catalysis, lithium battery electrodes and the like, and has wide market application. The ultrathin metal strip has the characteristics of high technical requirement, high added value and the like. At present, most production equipment of the ultrathin metal strip is monopolized abroad, the occupancy rate in China is low, and the technical index cannot reach the advanced level abroad.
Production practice proves that crystal grains in the steel strip can change after the stainless steel is cold-rolled into the steel strip. The strip steel is continuously heated and annealed by the continuous annealing furnace, so that deformed grains can be converted into uniform equiaxial grains again, the work hardening and residual internal stress are eliminated, and the structure and the performance of the strip steel are recovered to the heat treatment process quality before the cold rolling deformation state.
The steel band heat treatment device of prior art, the continuous heating annealing stove that its used include furnace body, winding mechanism and unwinding mechanism, and winding mechanism sets up the work piece entrance point at the furnace body, and unwinding mechanism sets up at the work piece exit end, and its theory of operation is: the steel belt is driven to pass through the process section of the furnace body by utilizing the tension formed by the winding mechanism and the unwinding mechanism to realize continuous heating annealing, namely the steel belt passes through the winding and unwinding mechanism and the tension mechanism to form the steel belt tension, so that the steel belt passes through the middle of the furnace in a suspended manner, and the annealing process is realized. This requires that the steel strip has a strength to withstand a large tension when passing through the process section of the continuous heating lehr, and if the steel strip is not thick enough, the steel strip is easily bent or even broken when heated under tension, so that the heat treatment apparatus of the prior art is only applicable to steel strips having a thickness of 1mm or more. Although the prior art discloses that the problem of roll marks generated by roller conveying can be solved by suspending a steel belt through a heat treatment process section by utilizing air support, the problems that workpieces droop in the process section of a heat treatment furnace even touch the bottom of the furnace and the like due to unstable wind support exist.
For example: chinese patent publication discloses:
the utility model discloses a continuous amorphous and nanocrystalline alloy strip tension annealing furnace, with the application number of 2021223052754, which comprises a tunnel furnace body, a traction component and a traction component for traction strip arranged at the front end of the furnace body; the feeding component is used for feeding the strip into the furnace body; and the tension regulating and controlling component is arranged between the feeding component and the furnace body and is used for automatically regulating the tension of the strip in the strip annealing process. The utility model discloses a tension regulation and control subassembly is adjusted and is drawn the speed difference between subassembly and the pay-off subassembly, and the counter weight that adds on the slide is adjusted in the cooperation, makes the tensile force of strip remain a definite value all the time to continuous operation improves the tensile stability of strip continuous heat treatment in-process. The special tension regulating and controlling component is required to be configured to match with the counterweight additionally arranged on the adjusting slide seat, so that the tension of the strip is always kept at a certain value, and the special tension regulating and controlling component is only suitable for steel strips with the thickness of more than 1mm and is not suitable for metal strips with the thickness of less than or equal to 0.3 mm.
The invention discloses a method for improving intergranular corrosion of an aluminum alloy sheet, and application number 2021116558319, and the method is a method for improving the intergranular corrosion of a 5083H116 sheet, and mainly adopts an air cushion type continuous heat treatment furnace to carry out heat treatment on an aluminum alloy strip. The invention mainly aims at the problem of unqualified intergranular corrosion in the stabilizing treatment process of the box-type furnace, the continuous heat treatment of the strip is realized by adopting the air cushion type continuous heat treatment furnace, the strip is quickly heated and cooled in the furnace, in addition, in the whole stabilizing heat treatment process, the strip is uniformly heated and cooled, the suspension of the strip is realized through the air cushion pressure, finally, the preparation of 5083H116 qualified products with good performances is realized, and the problems of unstable intergranular corrosion, poor surface quality, low production efficiency and high comprehensive cost are solved. The speed difference between the traction assembly and the feeding assembly needs to be adjusted through the tension adjusting and controlling assembly, so that the device is only suitable for steel belts with the thickness of more than 1mm and is not suitable for metal belts with the thickness of less than or equal to 0.3 mm.
The invention is named as a heat treatment method of an alloy steel strip, and the invention with the application number of 202211039424X is applied, wherein high-temperature hot air is used for replacing a transmission roller to support the ultrathin alloy steel strip when the ultrathin alloy steel strip enters a heating furnace for heat treatment, so that the ultrathin alloy steel strip is heated while being supported by the high-temperature hot air, and the defects of scratches, roll marks and the like on the surface of the ultrathin alloy strip cannot occur; meanwhile, inert gas is used as high-temperature hot air, the ultrathin alloy steel strip is prevented from being oxidized while being heated, the defects that the ultrathin alloy steel strip is contacted and pressed with a transmission roller in a furnace under the action of self gravity, scratches, roll marks and the like can be formed on the surface of the ultrathin alloy strip are overcome, and the quality of the ultrathin alloy steel strip is reduced. The invention needs to support the ultrathin alloy steel strip by high-temperature hot air, has the problems of unstable hot air and wind power, unstable support steel strip, workpiece drooping in the process section of the heat treatment furnace even touching the furnace bottom due to unstable wind power support, high noise, high energy consumption and the like, and in addition, because the support is supported by wind power, the size of the air box is limited, and the air box can only be used for the condition that the process section of heat treatment is short.
For a metal strip (steel strip) with the thickness less than or equal to 0.3mm, because the ultra-thin metal strip has low strength, the ultra-thin metal strip is very easy to be broken when heated under the tension condition of the prior art, so that tension cannot be established, and the ultra-thin metal strip can droop at the bottom of a furnace when heated under the tension-free condition, so that the surface of a product is abraded and unqualified. Therefore, the heat treatment method of the continuous annealing furnace in the prior art is adopted to continuously heat and anneal a metal strip (steel strip) with the thickness less than or equal to 0.3mm, and has the following problems: (1) Are prone to buckling and even snapping when heated under tension. (2) The workpiece may sag to the bottom of the furnace when heated without tension (e.g., hot air support) causing the surface of the product to wear and fail.
Although the existing heat treatment equipment can convey the ultrathin steel strip (workpiece) by conveying the ultrathin steel strip by using the conveying belt so as to overcome the defect that the workpiece can droop at the bottom of the furnace when being heated under the condition without tension (such as hot air supporting), the existing heat treatment equipment needs to utilize the compression roller to compress the workpiece and the conveying belt and then convey the workpiece and the conveying belt into the heat treatment furnace (box body) in the process of conveying the workpiece. For example, chinese patent publication discloses: the utility model discloses a "steel band equipment for heat treatment", patent number "2021223545291" utility model patent, including conveyer belt and heat treatment case, be equipped with heating channel along length direction in the heat treatment case, the conveyer belt passes heating channel, heat treatment case feed inlet department is equipped with compressing assembly, compressing assembly includes at least one first pinch roller and at least one second pinch roller, first pinch roller and second pinch roller interval set up, first pinch roller is located the conveyer belt top, the second pinch roller is located the conveyer belt below, first pinch roller minimum is less than the second pinch roller peak. The utility model discloses a patent mainly sets up first pinch roller and second pinch roller in heat treatment case feed inlet department, sticiss the steel band on the conveyer belt, and when the conveyer belt rotated, it got into the heat treatment case through frictional force drive steel band and carries out heat treatment. The utility model discloses a main problem that exists is: roll marks and indentations are easy to generate, and the product quality is affected.
Disclosure of Invention
The invention aims to solve the problems that the workpiece sags in a process section of a heat treatment furnace even touches the furnace bottom due to unstable wind supporting and the problems of high noise, high energy consumption and the like of the existing hot wind supporting type heat treatment method and the problems that roll marks and impressions are easy to generate in the transmission of a roll-pressing type conveying belt, the product quality is influenced and the like, and provides a heat treatment production line for continuously heating and annealing micro-tension ultrathin strips. The method has the substantial characteristics of preventing the workpiece from being bent and snapped, preventing the workpiece from drooping at the bottom of a furnace, preventing the surface of the workpiece from being abraded, preventing the surface of the workpiece from generating prominent roll marks, indentation marks and the like, and has obvious technical progress.
The purpose of the invention can be achieved by adopting the following technical scheme:
the heat treatment production line for micro-tension ultrathin strip continuous heating annealing comprises a continuous heating annealing furnace and a control system, wherein a feeding mechanism, a heating system, a cooling system and a discharging mechanism are arranged in the continuous heating annealing furnace, an unwinding mechanism is arranged at the inlet end of the continuous heating annealing furnace, and a winding mechanism is arranged at the outlet end of the continuous heating annealing furnace; the structure is characterized in that: an internal circulation synchronous conveying structure is arranged in a process section of the continuous heating annealing furnace, the internal circulation synchronous conveying structure is formed by connecting a transmission mechanism and an internal circulation steel belt, the transmission mechanism drives the internal circulation conveying steel belt to synchronously pass through a heating system and a cooling system and continuously circulate and operate, so that the internal circulation conveying steel belt is supported and synchronously passes through the process section of the continuous heating annealing furnace with the workpiece, and a micro-tension type workpiece conveying and supporting structure is formed; the output end of the unwinding mechanism is communicated with the input end of the internal circulation conveying structure, so that workpieces passing through the process section of the continuous heating annealing furnace are borne on the internal circulation conveying steel belt, and the input end of the winding mechanism is communicated with the output end of the internal circulation conveying structure; the control system is provided with a plurality of signal input ends and a plurality of signal output ends, the signal output end of the control system is connected with the control signal input ends of the heating system, the cooling system, the unwinding mechanism, the winding mechanism and the internal circulation conveying structure, and the control system controls the unwinding mechanism, the winding mechanism and the internal circulation conveying structure to synchronously operate, so that the operation speed of the internal circulation conveying steel belt is the same as the advancing speed of a workpiece, and a synchronous control structure is formed; the signal input end of the control system is connected with the signal output ends of the heating system, the cooling system, the unreeling mechanism, the reeling mechanism and the internal circulation transmission structure to form a signal feedback structure; thereby forming a processing production line for continuous heating and annealing of the micro-tension ultrathin strip with a closed-loop synchronous control structure.
The purpose of the invention can be achieved by adopting the following technical scheme:
furthermore, a deviation correcting device is arranged in the winding mechanism, a series structure is formed by the deviation correcting device, the winding unit and the winding tension control unit, the deviation correcting device is arranged in the front, the winding tension control unit is arranged in the middle, and the winding unit is arranged at the back to form the deviation correcting type winding mechanism.
Furthermore, in the internal circulation conveying structure, a transmission mechanism consists of a transmission motor, two main transmission shafts and two auxiliary transmission shafts, wherein the two main transmission shafts are arranged at two ends of the continuous annealing furnace, and the position heights of the two main transmission shafts are equivalent to those of the unwinding mechanism and the winding mechanism, so that the internal circulation steel belt just supports the workpiece; two driven shafts are respectively arranged at the lower inner side of one main transmission shaft to form a four-point supporting structure; the internal circulation conveying steel belt is connected to the four-point support structure to form an internal circulation structure; the main transmission shaft is connected with an output shaft of the transmission motor, a control input end of the transmission motor is connected with a signal output end of the control system, a pressure sensor and a speed sensor are arranged at the output shaft of the transmission motor or on the main transmission shaft, and electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of the control system to form a closed-loop control structure; the control system controls the rotating speed of the transmission motor to synchronize the speed of the internal circulation steel strip with the advancing speed of the workpiece.
Furthermore, the unreeling mechanism is formed by serially connecting an unreeling unit and an unreeling tension control unit, the unreeling unit is arranged in front, the unreeling tension control unit is arranged behind, and the workpieces are conveyed to the inner circulation conveying steel belt through the unreeling tension control unit; the winding mechanism comprises a winding unit and a winding tension control unit, the winding unit and the winding tension control unit form a series structure, the winding tension control unit is arranged in front, the winding unit is arranged behind, and a workpiece is conveyed to the input end of the winding tension control unit from the internal circulation conveying steel belt, is controlled in tension and speed by the winding tension control unit and finally enters the winding unit.
Furthermore, the unwinding unit consists of an unwinding motor and an unwinding roller, a pressure sensor and a speed sensor are arranged at the output shaft of the unwinding roller or the unwinding motor, the electrical signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system, and a signal output end of the control system is connected with a control signal input end of the unwinding motor to form a closed-loop unwinding control structure; the unwinding tension control unit consists of an unwinding tension motor and three unwinding tension rollers, and the three unwinding tension rollers are arranged in a triangular shape to form a three-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the position of an output shaft of the unreeling tension motor or one of the unreeling tension rollers, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with one signal input end of the control system, one signal output end of the control system is connected with the control signal input end of the unreeling tension motor, and a closed-loop unreeling tension control structure is formed.
Furthermore, the winding machine set consists of a winding motor and a winding roller, a pressure sensor and a speed sensor are arranged at the output shaft of the winding roller or the winding motor, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system, and a signal output end of the control system is connected with a control signal input end of the winding motor to form a closed-loop winding control structure; the winding tension control unit consists of a winding tension motor and four winding tension rollers, and the four winding tension rollers are arranged in an S shape to form a four-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the output shaft of the winding tension motor or one of the winding tension rollers, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with one signal input end of a control system, one signal output end of the control system is connected with the control signal input end of the winding tension motor, and a closed-loop winding tension control structure is formed; the control system controls the rotating speeds of the winding tension motor and the winding motor so that the linear speeds of the winding tension roller and the winding roller are synchronous with the speed of the internal circulation steel strip 8 and the advancing speed of the workpiece.
The invention has the following prominent substantive features and remarkable progress:
1. the internal circulation synchronous conveying structure is arranged in the process section of the continuous heating annealing furnace and consists of a transmission mechanism and an internal circulation steel belt which are connected, and the transmission mechanism drives the internal circulation conveying steel belt to synchronously pass through the heating system and the cooling system and continuously and circularly operate, so that the internal circulation conveying steel belt is supported and synchronously pass through the process section of the continuous heating annealing furnace with the workpiece, and a micro-tension type workpiece conveying and supporting structure is formed; the output end of the unwinding mechanism is communicated with the input end of the internal circulation conveying structure, so that workpieces passing through the process section of the continuous heating annealing furnace are borne on the internal circulation conveying steel belt, and the input end of the winding mechanism is communicated with the output end of the internal circulation conveying structure; the control system is provided with a plurality of signal input ends and a plurality of signal output ends, the signal output ends of the control system are connected with the control signal input ends of the heating system, the cooling system, the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure, and the control system controls the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure to synchronously operate, so that the operating speed of the internal circulation conveying steel belt is the same as the advancing speed of a workpiece, and a synchronous control structure is formed; the signal input end of the control system is connected with the signal output ends of the heating system, the cooling system, the unreeling mechanism, the reeling mechanism and the internal circulation transmission structure to form a signal feedback structure; thereby forming a processing production line for continuous heating and annealing of the micro-tension ultrathin strip with a closed-loop synchronous control structure. Therefore, the problems that the workpiece sags at the process section of the heat treatment furnace even touches the furnace bottom and has high noise, high energy consumption and the like due to unstable wind supporting of the existing hot air supporting type heat treatment method and the problems that roll marks and indentations are easily generated in the transmission of a roll-pressing type conveying belt to influence the product quality and the like can be solved, and the hot air supporting type heat treatment method has the substantial characteristics and obvious technical progress of preventing the workpiece from being bent and snapped, preventing the workpiece from sagging at the bottom of the furnace, preventing the surface of the workpiece from being abraded, preventing the surface of the workpiece from generating the roll marks and the indentations and the like.
2. The invention is characterized in that the synchronous control structure is used for controlling the synchronous operation of the unwinding mechanism, the winding mechanism and the internal circulation conveying structure, so that the operation speed of the internal circulation conveying steel belt is the same as the advancing speed of a workpiece, the synchronous operation type internal circulation workpiece conveying and supporting structure is formed, the arrangement of a rolling mechanism at the inlet end and the outlet end of a heat treatment furnace is not needed, the generation of roll marks and indentations on the workpiece is avoided, and the main characteristic of the invention which is different from the existing hot air type supporting workpiece conveying structure is that the problems of high noise, high energy consumption and the like caused by the fact that the workpiece sags in the process section of the heat treatment furnace even touches the furnace bottom and additional drums are needed due to unstable wind supporting are avoided. The method has the outstanding substantive characteristics and obvious technical progress of preventing the workpiece from being bent and snapped, preventing the workpiece from sagging at the bottom of the furnace, preventing the surface of the workpiece from being worn, preventing the surface of the workpiece from generating roll marks and indentations, having no noise, saving energy and the like.
3. Because the deviation correcting device is arranged in the winding mechanism, the deviation correcting device, the winding tension control unit and the winding machine set form a series structure, the deviation correcting device is arranged in the front, the winding tension control unit is arranged in the middle, and the winding machine set is arranged in the rear, so that the deviation correcting type winding mechanism is formed. Therefore, the deviation of the workpiece (thin strip) before entering the winding tension control unit can be corrected, the winding tension control is accurate, the workpiece (thin strip) is more tidy and firmer after being wound, and the device has the characteristics of accurate product winding control, good product winding quality, high efficiency and the like.
Drawings
Fig. 1 is a schematic front view of an embodiment 1 of the present invention.
Fig. 2 is a schematic sectional structure diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic top view of the embodiment 1 of the present invention.
Fig. 4 is a schematic perspective view of embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of an unwinding mechanism and a winding mechanism in embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a winding mechanism in embodiment 1 of the present invention.
FIG. 7 is a schematic view showing the effect of heat treatment in embodiment 1 of the present invention.
Fig. 8 is a schematic view showing the effect of heat treatment in the prior art.
Detailed Description
Specific example 1:
referring to fig. 1 to 4, the heat treatment line for continuous heating and annealing of micro-tension ultrathin strip material according to the embodiment includes a continuous heating and annealing furnace and a control system 13, wherein a feeding mechanism 3, a heating system 4, a cooling system 5 and a discharging end mechanism 6 are arranged in the continuous heating and annealing furnace 20, and an unwinding mechanism and a winding mechanism are arranged at an inlet end and an outlet end of the continuous heating and annealing furnace 20; an internal circulation synchronous conveying structure is arranged in a process section of the continuous heating annealing furnace 20, the internal circulation synchronous conveying structure is formed by connecting a transmission mechanism 7 and an internal circulation steel belt 8, the transmission mechanism 7 drives the internal circulation conveying steel belt 8 to synchronously pass through a heating system 4 and a cooling system 5 and continuously and circularly operate, so that the internal circulation conveying steel belt 8 is supported and synchronously passes through the process section of the continuous heating annealing furnace with workpieces, and a micro-tension type workpiece conveying and supporting structure is formed; the output end of the unwinding mechanism is communicated with the input end of the internal circulation conveying structure, so that workpieces passing through the process section of the continuous heating annealing furnace are borne on the internal circulation conveying steel belt 8, and the input end of the winding mechanism is communicated with the output end of the internal circulation conveying structure; the control system 13 is provided with a plurality of signal input ends and a plurality of signal output ends, the signal output end of the control system 13 is connected with the control signal input ends of the heating system 4, the cooling system 5, the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure, and the control system 13 controls the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure to synchronously operate, so that the operating speed of the internal circulation conveying steel belt 8 is the same as the advancing speed of the workpiece, and a synchronous control structure is formed; the signal input end of the control system 13 is connected with the signal output ends of the heating system 4, the cooling system 5, the unreeling mechanism, the reeling mechanism and the internal circulation transmission structure to form a signal feedback structure; thereby forming a processing production line for continuous heating and annealing of the micro-tension ultrathin strip with a closed-loop synchronous control structure.
In this embodiment:
a deviation correcting device 10 is arranged in the winding mechanism, a series structure is formed by the deviation correcting device 10, a winding unit 12 and a winding tension control unit 11, the deviation correcting device 10 is arranged in front of the winding tension control unit 11, and the winding unit 12 is arranged behind the winding tension control unit to form the deviation correcting type winding mechanism.
The deviation correcting device 10 consists of two groups of rotating rollers 10-1 arranged at high and low positions. The deviation correcting device forms a deviation correcting control and adjustment system and consists of a correcting and adjusting roller and a deviation correcting guide roller, a strip position detector is arranged between the two rollers, and an offset electric cylinder is arranged on the correcting and adjusting roller and can control the angle of the correcting and adjusting roller.
In the internal circulation conveying structure, a transmission mechanism 7 consists of a transmission motor, two main transmission shafts 7-1 and two auxiliary transmission shafts 7-2, and the main transmission shafts 7-1 and the auxiliary transmission shafts 7-2 form a steering roller; two main transmission shafts 7-1 are arranged at two ends of the continuous annealing furnace, and the position heights of the two main transmission shafts are equivalent to those of the unwinding mechanism and the winding mechanism, so that the internal circulation steel belt 8 just supports a workpiece; the two driven shafts 7-2 are respectively arranged at the inner side below one main transmission shaft 7-1 to form a four-point supporting structure; the internal circulation conveying steel belt 8 is connected to the four-point supporting structure to form an internal circulation structure; the main transmission shaft 7-1 is connected with an output shaft of a transmission motor, a control input end of the transmission motor is connected with a signal output end of the control system 13, a pressure sensor and a speed sensor are arranged at the output shaft of the transmission motor or on the main transmission shaft 7-1, and electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of the control system 13 to form a closed-loop control structure; the control system 13 synchronizes the speed of the internally circulating steel strip 8 with the advancing speed of the workpiece by controlling the rotation speed of the transmission motor.
Referring to fig. 5, the unwinding mechanism is composed of an unwinding unit 1 and an unwinding tension control unit 2 which are connected in series, the unwinding unit 1 is in front, the unwinding tension control unit 2 is behind, and a workpiece is conveyed to an internal circulation conveying steel belt 8 through the unwinding tension control unit 2; the winding mechanism comprises a winding unit 12 and a winding tension control unit 11, the winding unit 12 and the winding tension control unit 11 form a series structure, the winding tension control unit 11 is arranged in front, the winding unit 12 is arranged behind, and a workpiece is conveyed from the internal circulation conveying steel belt 8 to the input end of the winding tension control unit 11, then the tension and the speed are controlled by the winding tension control unit 11, and finally the workpiece enters the winding unit 12.
The unwinding unit 1 consists of an unwinding motor and an unwinding roller 1-1, a pressure sensor and a speed sensor are arranged at the unwinding roller 1-1 or an output shaft of the unwinding motor, electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system 13, and a signal output end of the control system 13 is connected with a control signal input end of the unwinding motor to form a closed-loop unwinding control structure; the unreeling tension control unit 2 consists of an unreeling tension motor 2-1 and three unreeling tension rollers 2-2, wherein the three unreeling tension rollers 2-2 are arranged in a triangular shape to form a three-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the output shaft of the unreeling tension motor 2-1 or one unreeling tension roller 2-2, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with one signal input end of the control system 13, one signal output end of the control system 13 is connected with the control signal input end of the unreeling tension motor 2-1, and a closed-loop unreeling tension control structure is formed.
Referring to fig. 6, the winding unit 12 is composed of a winding motor and a winding roller 12-1, a pressure sensor and a speed sensor are arranged at the winding roller 12-1 or an output shaft of the winding motor, electrical signal output ends of the pressure sensor and the speed sensor are connected with a signal input end of the control system 13, and a signal output end of the control system 13 is connected with a control signal input end of the winding motor, so as to form a closed-loop winding control structure; the winding tension control unit 11 consists of a winding tension motor 11-1 and four winding tension rollers 11-2, wherein the four winding tension rollers 11-2 are arranged in an S shape to form a four-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the output shaft of the winding tension motor 11-1 or one winding tension roller 11-2, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with one signal input end of a control system 13, one signal output end of the control system 13 is connected with the control signal input end of the winding tension motor 11-1, and a closed-loop winding tension control structure is formed.
In this embodiment, the control system 13 may adopt a PLC control system of a conventional technology and a common connection and control method thereof. The feeding mechanism 3 and the discharging mechanism 6 can adopt a roller transmission structure of the conventional technology, and the furnace body heating system 4 and the cooling system 5 can adopt the conventional technology for the furnace body heating system 4 and the cooling system 5 of the continuous heat treatment furnace. The pressure sensor may be a pressure sensor of conventional technology and the speed sensor may be a speed sensor of conventional technology. The unreeling motor can adopt a servo motor of the conventional technology, and the unreeling roller 1-1 can adopt a rotating roller of the conventional technology; the unreeling tension motor 2-1 can adopt a servo motor in the conventional technology, and the unreeling tension roller 2-2 can adopt a roller in the conventional technology. The winding motor can adopt a servo motor of the conventional technology, and the winding roller 12-1 can adopt a rotating roller of the conventional technology; the winding tension motor 11-1 can adopt a servo motor in the conventional technology, and the winding tension roller 11-2 can adopt a rotating roller in the conventional technology. The transmission motor can adopt a servo motor of the conventional technology, and the two main transmission shafts 7-1 can adopt a rotating roller of the conventional technology. The deviation correcting device 10 consists of two groups of rotating rollers 10-1 arranged at high and low positions, and the rotating rollers 10-1 can adopt the rotating rollers of the conventional technology.
The embodiment has the following characteristics:
as an improvement of the technical scheme, the deviation correcting device is arranged in the winding mechanism, the deviation correcting device, the winding tension control unit and the winding machine set form a series structure, the deviation correcting device is arranged in the front, the winding tension control unit is arranged in the middle, and the winding machine set is arranged in the rear to form the deviation correcting type winding mechanism. Therefore, the deviation of the workpiece (thin strip) before entering the winding tension control unit can be corrected, the winding tension control is accurate, the workpiece (thin strip) is more tidy and firmer after being wound, and the device has the characteristics of accurate product winding control, good product winding quality, high efficiency and the like.
As an improvement of the technical scheme, a pressure sensor and a speed sensor are arranged at an output shaft of an unwinding roller or an unwinding motor, electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system, and a signal output end of the control system is connected with a control signal input end of the unwinding motor to form a closed-loop unwinding control structure; the unwinding tension control unit consists of an unwinding tension motor and three unwinding tension rollers, and the three unwinding tension rollers are arranged in a triangular shape to form a three-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the position of an output shaft of the unreeling tension motor or one of the unreeling tension rollers, the electric signal output ends of the pressure sensor and the speed sensor are connected with one signal input end of a control system, one signal output end of the control system is connected with the control signal input end of the unreeling tension motor, and a closed-loop unreeling tension control structure is formed. Therefore, the speed and the constant tension of the workpiece (thin strip) can be accurately controlled before the workpiece (thin strip) enters the process section of the continuous annealing furnace, the workpiece (thin strip) can be ensured to stably enter the internal circulation conveying steel strip of the process section, no tension or micro-tension exists under the internal circulation conveying steel strip and passes through the process section of the continuous annealing furnace, and the continuous annealing furnace has the characteristics of accurate workpiece (thin strip) unreeling control, good workpiece unreeling quality, high efficiency and the like.
As an improvement of the technical scheme, a pressure sensor and a speed sensor are arranged at the output shafts of the winding roller and the winding motor, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system, and a signal output end of the control system is connected with a control signal input end of the winding motor to form a closed-loop winding control structure; the winding tension control unit consists of a winding tension motor and four winding tension rollers, and the four winding tension rollers are arranged in an S shape to form a four-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the output shaft of the winding tension motor or one of the winding tension rollers, the electric signal output ends of the pressure sensor and the speed sensor are connected with one signal input end of a control system, one signal output end of the control system is connected with the control signal input end of the winding tension motor, and a closed-loop winding tension control structure is formed. Therefore, the speed and the tension of the workpiece (thin belt) can be accurately controlled to be constant before the workpiece (thin belt) enters the winding roller of the winding machine set, the workpiece (thin belt) can be ensured to stably enter the winding roller of the winding machine set, and the device has the characteristics of accurate winding control of the product (thin belt), good winding quality of the product workpiece, high efficiency and the like.
The embodiment is suitable for metal strips with the thickness less than or equal to 0.3mm, and the materials suitable for heat treatment comprise metal ultrathin strips such as iron, stainless steel, copper, aluminum, nickel and the like. The specification is that the thickness is 0.008-0.015mm, and the width is 150-280mm.
Referring to fig. 7, in this embodiment, when the ultra-thin strip passes through the continuous heating annealing furnace, the transmission mechanism 7 drives the internal circulation conveying steel belt 8 to pass through the heating system 4 and the cooling system 5 synchronously and continuously circularly operate, so that the internal circulation conveying steel belt 8 supports and passes through the process section of the continuous heating annealing furnace synchronously with the workpiece, a micro-tension type workpiece conveying and supporting structure is formed, the ultra-thin strip 9 is enabled to run synchronously on the internal circulation conveying steel belt 8, the problem that the steel belt cannot establish large tension is solved, and the annealing quality of the ultra-thin strip is ensured. Solves the technical problem of continuous bright annealing heat treatment of the ultra-thin metal strip. Referring to fig. 8, the supportless conveying structure (such as a hot air supporting structure) in the prior art has the problem that the workpiece sags in the process section of the heat treatment furnace and even touches the furnace bottom due to unstable wind force support.
The working principle of the embodiment is described in detail below with reference to the accompanying drawings:
referring to fig. 1 to 6, the unwinding mechanism conveys the ultra-thin strip 9 (workpiece) to the feeding port 3 of the continuous heating annealing furnace 20, then the ultra-thin strip is conveyed into the continuous heating annealing furnace 20 through the internal circulation conveying steel strip 8, the ultra-thin strip is conveyed into the heating system 4 through the internal circulation conveying steel strip 8 in the process section of the continuous heating annealing furnace 20, heated and cooled through the cooling system 5, and then the ultra-thin strip is conveyed to the discharging port 6 through the internal circulation conveying steel strip 8, so that the heat treatment process of the ultra-thin strip 9 (workpiece) is completed; the heat-treated workpiece section enters a winding mechanism at the outlet end of the continuous heating annealing furnace 20, and the workpiece is synchronously wound into a coiled material by the winding mechanism; the internal circulation conveying steel belt 8 is in the continuous running process, so that the internal circulation conveying steel belt 8 continuously and synchronously conveys workpieces to enter the process section for heat treatment; thereby completing the heat treatment process of the ultra-thin strip 9 (workpiece). During the whole heat treatment process, the control system 13 performs the following control processes:
1) Main drive control
Setting the running speeds of an annealing furnace unit (comprising a feeding mechanism 3, a heating system 4, a cooling system 5 and a discharging mechanism 6), a workpiece (strip) winding unit and a workpiece (strip) unwinding unit, and controlling the running speeds of the annealing furnace unit, the workpiece (strip) winding unit and the workpiece (strip) unwinding unit to be constant; controlling the uncoiling tension of the uncoiling unit, the coiling tension of the coiling unit and the tension of the transmission mechanism 7 in the process section to be constant, and controlling the tension of the transmission mechanism 7 in the process section to be constant to ensure that the micro-tension of the internal circulation transmission steel belt 8 is constant; and the diameter of the coil of the workpiece for unwinding and winding is measured and the diameter of the coil is calculated by sensors arranged in the unwinding mechanism and the winding mechanism.
2) Production process control
In the heat treatment process, the annealing furnace unit (comprising the feeding mechanism 3, the heating system 4, the cooling system 5 and the discharging mechanism 6), the winding mechanism and the unwinding mechanism are controlled to be linked, inching and linked according to the conventional heat treatment process, and the running speed of the annealing furnace unit (comprising the feeding mechanism 3, the heating system 4, the cooling system 5 and the discharging mechanism 6), the winding mechanism and the unwinding mechanism and the micro-tension of the winding mechanism, the unwinding mechanism and the internal circulation conveying steel belt 8 are controlled.
3) Auxiliary system process control
The whole heat treatment process is monitored, and the annealing furnace has real display and automatic interlocking functions such as system fault, alarm and the like, so that various functions required by the conventional heat treatment process of an annealing furnace unit (comprising a feeding mechanism 3, a heating system 4, a cooling system 5 and a discharging mechanism 6), a winding mechanism and an unwinding mechanism, and the safety requirements of an electrical system and mechanical equipment are met. In order to meet all functions required by the operation of each unit and the safety of an electrical system and mechanical equipment, all auxiliary systems have an automatic interlocking function. And real-time display such as system failure, alarm and the like is also provided.
4) The running speed of the internal circulation conveying steel belt 8 and the workpiece is controlled to be synchronous and constant
The speed control of the internal circulation conveying steel belt 8 is extremely important in the control of the whole unit, and the stability of the internal circulation conveying steel belt can directly influence the product quality. The speed control mainly comprises: speed stabilization control, acceleration and deceleration control and tension control.
In the operation process of the embodiment, the workpiece (ultrathin belt) is conveyed from the unreeling direction to the reeling direction, the unreeling reel diameter is continuously reduced, the reeling reel diameter is continuously increased, when the tension (pulling force) of the workpiece (ultrathin belt) is constant, the torque of the reeling roller is continuously changed, and in the process, the output torque of the motor needs to be continuously controlled to keep the tension constant.
The winding diameter measurement and tension control are described below by taking a winding mechanism as an example:
the winding roller in the winding unit is connected with a servo motor, and the rotating speed N of the winding roller can be output and fed back in real time through a sensor arranged in an output shaft of the servo motor Harvesting machine Sum moment M Harvesting machine 。
The sensor arranged on the winding tension roller 11-2 can measure the rotating speed N of the winding tension roller 11-2 Sheet of paper And tension measurement F of the take-up tension roller 11-2 Sheet of paper . The method comprises the following steps: the rotating speed of the winding tension roller 11-2 is measured to be N Sheet of paper Measuring the tension of the take-up tension roll 11-2 as F Sheet of paper 。
Linear velocity V of winding tension roller 11-2 Sheet of paper ＝π*N Sheet of paper *D Sheet of paper Linear velocity V of wind-up roll Harvesting machine ＝π*N Harvesting machine *D Harvesting machine (ii) a Wherein: d Harvesting machine To wind-up roll diameter, D Sheet of paper Is the diameter of the winding tension roller 11-2.
The speed of the ultra-thin steel strip (workpiece) through the rolls involved in the process section is uniform, i.e. V Belt ＝V Sheet of paper ＝V Harvesting machine *N Sheet of paper *D Sheet of paper ＝N Harvesting machine *D Harvesting machine Therefore, the speed of the inner-circulation conveying steel strip 8 is controlled to be the same as that of the ultra-thin steel strip, that is, V Belt ＝V Sheet of paper ＝V Harvesting machine *N Sheet of paper *D Sheet of paper ＝N Harvesting machine *D Harvesting machine 。
So as to obtain a coil diameter D Harvesting machine ＝N Sheet of paper *D Sheet of paper /N Harvesting machine And can be measured in real time.
And a winding torque M Harvesting machine ＝F Sheet of paper *D Harvesting machine /2＝F Sheet of paper *N Sheet of paper *D Sheet of paper /N Harvesting machine /2。
Therefore, the output tension of the motor can be controlled to be constant by setting the tension value and the tension control amount.
Wherein:
speed V of ultra-thin metal belt (workpiece) and internal circulation conveying steel belt 8 Belt (M/S), wrap-upLinear velocity V of tension roller and unwinding tension roller (tension roller for short) Sheet of paper (M/S), the speed and the rotation speed N of a winding tension roller and an unwinding tension roller (tension roller for short) Sheet of paper (R/S), diameter D of winding tension roller and unwinding tension roller (tension roller for short) Sheet of paper (M), tension F of winding tension roller and unwinding tension roller (tension roller for short) Sheet of paper (N), wind-up moment M Harvesting machine (NM), take-up speed V Harvesting machine (M/S), rotational speed N of wind-up roll Harvesting machine (M/S), diameter of wrap-up (wrap diameter) D Harvesting machine (M)。
By the method, tension control and roll diameter measurement can be realized, so that the aim of constant tension control is fulfilled.
And (3) synchronous control:
the speed of the ultra-thin strip (workpiece) in the continuous heating annealing furnace and the speed of the internal circulation conveying steel strip 8 are synchronously controlled by a servo motor, and the speed V of the internal circulation conveying steel strip in the furnace Inner part According to V Sheet of paper The measured speed is driven by a servo motor to realize the speed V of the internally-circulated conveying steel strip Inner part And the speed V of the tension roller Sheet of paper And the consistency is maintained.
In the same way, the control principle of the unwinding unit and the measurement of the unwinding speed and the tension can be determined by referring to the relevant data in the winding mechanism.
In conclusion, the embodiment can ensure that the ultrathin strip can synchronously run on the internal circulation steel strip 8 when passing through the process section of the continuous heating annealing furnace, solves the problem that the steel strip can not establish tension, and ensures the annealing quality of the ultrathin strip; thereby solving the technical problem of continuous bright annealing heat treatment of the ultrathin metal strip.
Key technical point of the invention
1. The internal circulation steel belt and the ultrathin strip run synchronously. 2. And controlling the micro-tension steel belt. 3. An intelligent control system.
Claims (7)
1. A heat treatment production line for micro-tension ultra-thin strip continuous heating annealing comprises a continuous heating annealing furnace and a control system (13), wherein a feeding mechanism (3), a heating system (4), a cooling system (5) and a discharging mechanism (6) are arranged in the continuous heating annealing furnace (20), an unwinding mechanism is arranged at the inlet end of the continuous heating annealing furnace (20), and a winding mechanism is arranged at the outlet end of the continuous heating annealing furnace; the method is characterized in that: an internal circulation synchronous conveying structure is arranged in a process section of the continuous heating annealing furnace (20), the internal circulation synchronous conveying structure is formed by connecting a transmission mechanism (7) and an internal circulation steel belt (8), the transmission mechanism (7) drives the internal circulation conveying steel belt (8) to synchronously pass through a heating system (4) and a cooling system (5) and continuously circulate and operate, so that the internal circulation conveying steel belt (8) is supported and synchronously pass through the process section of the continuous heating annealing furnace with workpieces, and a micro-tension type workpiece conveying and supporting structure is formed; the output end of the unwinding mechanism is communicated with the input end of the internal circulation conveying structure, so that workpieces passing through the process section of the continuous heating annealing furnace are borne on the internal circulation conveying steel belt (8), and the input end of the winding mechanism is communicated with the output end of the internal circulation conveying structure; the control system (13) is provided with a plurality of signal input ends and a plurality of signal output ends, the signal output end of the control system (13) is connected with the control signal input ends of the heating system (4), the cooling system (5), the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure, and the control system (13) controls the unreeling mechanism, the reeling mechanism and the internal circulation conveying structure to synchronously operate, so that the operating speed of the internal circulation conveying steel belt (8) is the same as the advancing speed of a workpiece, and a synchronous control structure is formed; the signal input end of the control system (13) is connected with the signal output ends of the heating system (4), the cooling system (5), the unreeling mechanism, the reeling mechanism and the internal circulation transmission structure to form a signal feedback structure; thereby forming a processing production line for continuous heating annealing of the micro-tension ultrathin strip with a closed-loop synchronous control structure.
2. The heat treatment line for continuous heat annealing of micro-tension ultra-thin strip as claimed in claim 1, wherein: a deviation correcting device (10) is arranged in the winding mechanism, a series structure is formed by the deviation correcting device (10), a winding unit (12) and a winding tension control unit (11), the deviation correcting device (10) is arranged in front, the winding tension control unit (11) is arranged in the middle, and the winding unit (12) is arranged behind to form a deviation correcting type winding mechanism.
3. The continuous thermal annealing line for micro-tension ultra-thin strip as claimed in claim 1, wherein: in the internal circulation conveying structure, a transmission mechanism (7) consists of a transmission motor, two main transmission shafts (7-1) and two auxiliary transmission shafts (7-2), wherein the two main transmission shafts (7-1) are arranged at two ends of the continuous annealing furnace, and the position heights of the two main transmission shafts are equivalent to those of an unreeling mechanism and a reeling mechanism so that an internal circulation steel belt (8) just supports a workpiece; two driven shafts (7-2) are respectively arranged at the inner side below one main transmission shaft (7-1) to form a four-point supporting structure; the internal circulation conveying steel belt (8) is connected to the four-point supporting structure to form an internal circulation structure; the main transmission shaft (7-1) is connected with an output shaft of a transmission motor, a control input end of the transmission motor is connected with a signal output end of the control system (13), a pressure sensor and a speed sensor are arranged at the output shaft of the transmission motor or on the main transmission shaft (7-1), and electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of the control system (13) to form a closed-loop control structure; the control system (13) synchronizes the speed of the internal circulation steel belt (8) with the advancing speed of the workpiece by controlling the rotating speed of the transmission motor.
4. The heat treatment line for continuous heat annealing of micro-tension ultra-thin strip as claimed in claim 3, wherein: the unwinding mechanism is formed by connecting an unwinding unit (1) and an unwinding tension control unit (2) in series, the unwinding unit (1) is in front, the unwinding tension control unit (2) is behind, and a workpiece is conveyed to an internal circulation conveying steel belt (8) through the unwinding tension control unit (2); the winding mechanism comprises a winding unit (12) and a winding tension control unit (11), the winding unit (12) and the winding tension control unit (11) form a series structure, the winding tension control unit (11) is arranged in front, the winding unit (12) is arranged behind, and a workpiece is conveyed from the inner circulation conveying steel belt (8) to the input end of the winding tension control unit (11), is controlled in tension and speed through the winding tension control unit (11), and finally enters the winding unit (12).
5. The continuous thermal annealing line for micro-tension ultra-thin strip as claimed in claim 4, wherein: the unwinding unit (1) consists of an unwinding motor and an unwinding roller (1-1), a pressure sensor and a speed sensor are arranged at the output shaft of the unwinding roller (1-1) or the unwinding motor, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of a control system (13), and a signal output end of the control system (13) is connected with a control signal input end of the unwinding motor to form a closed-loop unwinding control structure; the unwinding tension control unit (2) consists of an unwinding tension motor (2-1) and three unwinding tension rollers (2-2), wherein the three unwinding tension rollers (2-2) are arranged in a triangular shape to form a three-level straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at the output shaft of the unreeling tension motor (2-1) or one unreeling tension roller (2-2), the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with a signal input end of the control system (13), and a signal output end of the control system (13) is connected with a control signal input end of the unreeling tension motor (2-1), so that a closed-loop unreeling tension control structure is formed.
6. The continuous thermal annealing line for micro-tension ultra-thin strip as claimed in claim 4, wherein: the winding machine set (12) consists of a winding motor and a winding roller (12-1), a pressure sensor and a speed sensor are arranged at the output shafts of the winding roller (12-1) and the winding motor, the electric signal output ends of the pressure sensor and the speed sensor are respectively connected with one signal input end of the control system (13), one signal output end of the control system (13) is connected with the control signal input end of the winding motor, and a closed-loop winding control structure is formed; the winding tension control unit (11) consists of a winding tension motor (11-1) and four winding tension rollers (11-2), wherein the four winding tension rollers (11-2) are arranged in an S shape to form a four-stage straightening and adjusting structure; a pressure sensor and a speed sensor are arranged at an output shaft of the winding tension motor (11-1) and one winding tension roller (11-2), the electric signal output ends of the pressure sensor and the speed sensor are connected with one signal input end of a control system (13), one signal output end of the control system (13) is connected with the control signal input end of the winding tension motor (11-1), and a closed-loop winding tension control structure is formed; the control system (13) controls the winding tension motor (11-1) and the rotating speed of the winding motor to enable the linear speed of the winding tension roller (11-2) and the winding roller (12-1) to be synchronous with the speed of the internal circulation steel strip (8) and the advancing speed of the workpiece.
7. The heat treatment line for continuous heat annealing of micro-tension ultra-thin strip as claimed in claim 2, wherein: the deviation correcting device (10) consists of two groups of rotating rollers (10-1) arranged at high and low positions; the deviation correcting device forms a deviation correcting control and adjustment system and consists of a correcting adjusting roller and a deviation correcting guide roller, a strip position detector is arranged between the two rollers, and an offset electric cylinder is arranged on the correcting adjusting roller to control the angle of the correcting adjusting roller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211506838.9A CN115747468A (en) | 2022-11-29 | 2022-11-29 | Heat treatment production line for continuous heating and annealing of micro-tension ultrathin strip |
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| CN202211506838.9A CN115747468A (en) | 2022-11-29 | 2022-11-29 | Heat treatment production line for continuous heating and annealing of micro-tension ultrathin strip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117363859A (en) * | 2023-10-31 | 2024-01-09 | 江苏苏讯新材料科技股份有限公司 | High-strength high Tu Yin adhesion thinned stainless steel strip material and production process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117363859A (en) * | 2023-10-31 | 2024-01-09 | 江苏苏讯新材料科技股份有限公司 | High-strength high Tu Yin adhesion thinned stainless steel strip material and production process thereof |
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