Electromagnetic annealing device for cold-rolled steel sheet

Abstract

The utility model belongs to the technical field of cold-roll steel plate processing, and particularly relates to a cold-roll steel plate electromagnetic annealing device which comprises strip steel, an electromagnetic heater and two hydraulic wrapper roll assemblies distributed relative to the electromagnetic heater in a mirror image mode. A cooling fan, an induction heating coil and microcrystalline glass are arranged in the electromagnetic heater around the annealing cavity; the hydraulic wrapper roller assembly comprises rotationally-arranged winding drums, strip steel penetrates through the annealing cavity to complete annealing operation, and the two ends of the strip steel are connected with the two winding drums correspondingly and wound around the winding drums. According to the electromagnetic annealing device for the cold-rolled steel plate in the technical scheme, the electromagnetic heater is adopted for heating to finish annealing operation of strip steel, the heating speed is high, and the annealing requirement of the steel plate can be met within several seconds; the needed tunnel is short, the annealing process can be completed within the electromagnetic annealing meter, and the steel plate cannot be twisted and deformed; and the problem that the steel plate structure is damaged due to the fact that harmful gas overflows when the ceramic tube is broken is solved, coal gas is not burnt, and carbon dioxide emission is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of cold-rolled steel sheet processing technology, and particularly relates to an electromagnetic annealing device for cold-rolled steel sheets. Background Technology

[0002] Cold-rolled steel sheet is a product made by rolling hot-rolled coils at room temperature below the recrystallization temperature. During the production process, cold-rolled steel sheet needs to undergo annealing to improve the mechanical properties of the metal material, eliminate internal stress and work hardening, and refine the crystal structure.

[0003] Traditional cold-rolled steel sheet annealing involves inserting ceramic tubes inside a horizontal tunnel for heating with burning coal gas. This method presents challenges in controlling the temperature within the tunnel, as excessively high temperatures can cause the steel sheet to crack. Furthermore, once the ceramic tubes break, impurities in the coal gas, particularly sulfur and phosphorus, corrode and damage the steel sheet's surface structure. Additionally, continuous annealing in horizontal tunnels, often tens or even hundreds of meters long, results in significant steel sheet distortion due to gravity within the long tunnel, requiring reshaping after exiting the tunnel and wasting process time.

[0004] To address the aforementioned issues, an electromagnetic annealing device for cold-rolled steel sheets was designed. Utility Model Content

[0005] This utility model addresses the problems in the prior art by proposing the following technical solution:

[0006] The electromagnetic annealing device for cold-rolled steel sheet includes a strip, an electromagnetic heater, and two hydraulic roll assemblies that are mirror-distributed about the electromagnetic heater. An annealing chamber is formed inside the electromagnetic heater, and a cooling fan, an induction heating coil, and microcrystalline glass are arranged around the annealing chamber inside the electromagnetic heater.

[0007] The hydraulic winding roller assembly includes a rotating drum. The strip steel passes through the annealing chamber to complete the annealing operation. Both ends are connected to two drums and wound on the drums. The two drums rotate in the same direction and at the same speed, releasing the strip steel before annealing and winding it up after annealing.

[0008] As a preferred embodiment of the above technical solution, the hydraulic winding roller assembly further includes two rotatably mounted tension rollers, through which the strip passes.

[0009] As a preferred embodiment of the above technical solution, the tension roller is equipped with a tension roller speed meter.

[0010] As a preferred embodiment of the above technical solution, the hydraulic assisting roller assembly further includes an assisting roller, a hydraulic cylinder matched with the assisting roller, and a servo valve matched with the hydraulic cylinder;

[0011] The hydraulic assist roller assembly also includes a laser head detector, an accelerometer matching the assist roller, and a drum speed meter matching the drum.

[0012] As a preferred embodiment of the above technical solution, four auxiliary winding rollers are provided for each of the winding drums, and the four auxiliary winding rollers are circumferentially distributed on the outer side of the winding drum.

[0013] As a preferred embodiment of the above technical solution, an electromagnetic control cabinet is also included, wherein the electromagnetic control cabinet is equipped with a control touch screen and a start switch.

[0014] The beneficial effects of this utility model are as follows:

[0015] The electromagnetic annealing device for cold-rolled steel sheets in this technical solution uses an electromagnetic heater to heat the strip steel to complete the annealing operation. The heating speed is fast, and the annealing requirements of the steel sheet can be met in a few seconds. The required tunnel is short, and the annealing process can be completed within a meter using electromagnetic annealing, without the steel sheet twisting or deforming. There is no problem of harmful gas leakage and damage to the steel sheet structure due to the cracking of ceramic tubes. It does not burn coal gas, thus reducing carbon dioxide emissions.

[0016] The annealing operation of the strip steel is completed by using an electromagnetic heater. Since the electromagnetic heating of the steel plate reaches the Curie temperature, "the Curie temperature produces a paramagnetic phenomenon, and the electromagnetic heater no longer heats the steel plate." Therefore, there is no problem of the steel plate breaking due to excessive temperature, avoiding the shutdown caused by strip breakage and ensuring smooth production. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural schematic of the electromagnetic annealing device for cold-rolled steel sheets in Example 1;

[0018] Figure reference numerals: 1. Tension roller; 2. Strip steel; 3. Drum; 4. Auxiliary winding roller; 5. Servo valve; 6. Tension roller tachometer; 7. Accelerometer; 8. Laser head detector; 9. Drum tachometer; 10. Hydraulic cylinder; 11. Electromagnetic heater; 12. Cooling fan; 13. Induction heating coil; 14. Microcrystalline glass; 15. Electromagnetic control cabinet; 16. Control touch screen; 17. Start switch. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Example 1

[0021] like Figure 1As shown, the electromagnetic annealing device for cold-rolled steel sheet includes strip 2, electromagnetic heater 11 and two hydraulic roll assemblies that are mirror-distributed about electromagnetic heater 11. An annealing chamber is formed inside electromagnetic heater 11. A cooling fan 12, an induction heating coil 13 and a microcrystalline glass 14 are arranged around the annealing chamber inside electromagnetic heater 11.

[0022] The hydraulic winding roller assembly includes a rotating drum 3. The strip 2 passes through the annealing chamber to complete the annealing operation. Both ends are connected to two drums 3 and wound on the drums 3. The two drums 3 rotate in the same direction and at the same speed, releasing the strip 2 before annealing and winding it after annealing.

[0023] The electromagnetic annealing device for cold-rolled steel plates in this technical solution uses an electromagnetic heater 11 to heat and complete the annealing operation of the strip steel 2. The heating speed is fast, and the annealing requirements of the steel plate can be met in a few seconds. The required tunnel is short. The annealing process can be completed within 30 meters using electromagnetic annealing, and there will be no twisting or deformation of the steel plate. There is no problem of harmful gas leakage and damage to the steel plate structure due to the cracking of ceramic tubes. It does not burn coal gas and reduces carbon dioxide emissions.

[0024] The annealing operation of strip steel 2 is completed by using electromagnetic heater 11. Since the electromagnetic heating of the steel plate reaches the Curie temperature, "the Curie temperature produces a paramagnetic phenomenon, and the electromagnetic heater no longer heats the steel plate". There is no problem of the steel plate breaking due to excessive temperature, thus avoiding the shutdown caused by strip breakage and ensuring smooth production.

[0025] To avoid problems such as twisting and fluctuation of the strip steel, such as Figure 1 As shown, the hydraulic winding roller assembly also includes two rotating tension rollers 1, through which the strip 2 passes; the tension rollers 1 are set so that the strip 2 maintains a certain tension during the annealing conveying process, ensuring the annealing effect.

[0026] like Figure 1 As shown, tension roller 1 is equipped with tension roller speed meter 6. The tension roller speed meter 6 is set to monitor the traveling speed of tension roller 1 to ensure the normal operation of the electromagnetic annealing device for cold-rolled steel sheets.

[0027] To further optimize the electromagnetic annealing device for cold-rolled steel sheets in this technical solution, the continuous annealing process for cold-rolled steel sheets is extended, specifically as follows: Figure 1 As shown, the hydraulic assist roller assembly also includes an assist roller 4, a hydraulic cylinder 10 matched with the assist roller 4, and a servo valve 5 matched with the hydraulic cylinder 10; the hydraulic assist roller assembly also includes a laser head detector 8, an accelerometer 7 matched with the assist roller 4, and a drum speed meter 9 matched with the drum 3.

[0028] The laser head detector 8 and the accelerometer 7 on the winding roller 4 detect the position of the head of the strip 2, and the drum tachometer 9 measures the winding speed (head speed). The monitoring information from the laser head detector 8, accelerometer 7, and drum tachometer 9 is input into the computer for processing. Then, the hydraulic winding roller assembly controls the opening and closing of the hydraulic cylinder 10 of the winding roller 4, so that when the head of the stacked strip 2 is about to pass through the winding roller 4, the winding roller 4 passes over the head. The hydraulic winding roller assembly can effectively eliminate impact and also greatly reduce phenomena such as head end pressure damage and deformation during winding.

[0029] To further optimize the effectiveness of the test preparation assistance, such as Figure 1 As shown, there are four auxiliary rollers 4 corresponding to one roll 3, and the four auxiliary rollers 4 are distributed circumferentially on the outer side of the roll 3.

[0030] like Figure 1 As shown, to address the setup for operating the entire device, an electromagnetic annealing device for cold-rolled steel sheets also includes an electromagnetic control cabinet 15. The electromagnetic control cabinet 15 is equipped with a control touch screen 16 and a start switch 17. The start switch 17 performs on / off operations on the device, and the control touch screen 16 performs further control operations, such as controlling the opening and closing of the hydraulic cylinder 10.

[0031] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. Electromagnetic annealing device of cold-rolled steel sheets, comprising a strip (2), an electromagnetic heater (11) and two hydraulic coiling roller assemblies distributed in mirror image with respect to the electromagnetic heater (11), characterized in that, The electromagnetic heater (11) forms an annealing cavity inside, and the electromagnetic heater (11) is provided with a heat dissipation fan (12), an induction heating coil (13) and a microcrystalline glass (14) around the annealing cavity; The hydraulic coiling roller assembly comprises rotatingly arranged winding drums (3), the strip steel (2) is connected with and wound on the winding drums (3) through the annealing cavity to complete annealing operation, and the rotating directions and rotating speeds of the two winding drums (3) are consistent to release the strip steel (2) before annealing and wind the strip steel (2) after annealing.

2. The cold rolled steel sheet electromagnetic annealing device according to claim 1, characterized in that, The hydraulic coiling roller assembly further comprises two rotatingly arranged tension rollers (1), and the strip steel (2) passes through the two tension rollers (1).

3. The cold rolled steel sheet electromagnetic annealing device according to claim 2, wherein The tension roller (1) is correspondingly provided with a tension roller speed meter (6).

4. The cold rolled steel sheet electromagnetic annealing device of claim 1, wherein, The hydraulic coiling roller assembly further comprises a coiling roller (4), a hydraulic cylinder (10) matched with the coiling roller (4) and a servo valve (5) matched with the hydraulic cylinder (10). The hydraulic coiling roller assembly further comprises a laser head detector (8), an accelerometer (7) matched with the coiling roller (4) and a winding drum speed meter (9) matched with the winding drum (3).

5. The cold rolled steel sheet electromagnetic annealing device of claim 4, wherein, Four coiling rollers (4) are arranged corresponding to one winding drum (3) and are distributed on the outer side of the winding drum (3) in the circumferential direction.

6. The cold rolled steel sheet electromagnetic annealing device of claim 5, wherein, Further, an electromagnetic control cabinet (15) is arranged, and the electromagnetic control cabinet (15) is provided with a control touch screen (16) and a starting switch (17).

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