Stainless steel strip automatic production line and production method

Abstract

The invention relates to the technical field of stainless steel strip production, solves the problem that the existing steel strip production quality is poor, and discloses an automatic stainless steel strip production line and a production method. A first cleaning mechanism; the primary calendering mechanism comprises two first calendering rollers which are arranged up and down and is used for primarily calendering the steel belt; a second cleaning mechanism; the secondary calendering mechanism comprises two second calendering rollers which are arranged up and down, and the steel belt subjected to secondary cleaning penetrates through the space between the two second calendering rollers to remove water stains and perform secondary calendering; the annealing mechanism is used for annealing the steel strip subjected to secondary calendering; the third calendering mechanism comprises two third calendering rollers which are arranged up and down, and the annealed steel belt penetrates through the space between the two third calendering rollers to be subjected to third calendering; and the rolling mechanism is used for rolling the steel belt subjected to the three-pass rolling. The device can remove wrinkles on the surface of the steel strip, and the production quality of the stainless steel strip is improved.

Description

Technical Field

[0001] The present application relates to the technical field of stainless steel strip production, and in particular to an automated production line and production method for stainless steel strips. Background Art

[0002] Stainless steel is a material frequently used in the industrial field. Currently, stainless steel on the market is usually produced in the form of steel strips.

[0003] The general production process of stainless steel strip is to use rolling to compress and deform the steel strip. Some processes will anneal the steel strip before performing secondary rolling.

[0004] Since the current production process only compresses and deforms the raw materials through secondary rolling, the steel strip will stretch sideways during the deformation process. The applicant found in actual product production that certain "wrinkles" are likely to appear on the edges of both sides of the steel strip, which in turn affects the quality of the product. Summary of the invention

[0005] The present application discloses an automated production line and production method for stainless steel strips, which can improve product quality by rolling the side edges of the steel strips.

[0006] In the first aspect, the present application provides an automated production line for stainless steel strips, which adopts the following technical solutions: An automated production line for stainless steel strips, comprising: Feeding mechanism, used for unwinding stainless steel strip; The first cleaning mechanism washes the steel strip with water; A preliminary calendering mechanism, comprising two first calendering rollers arranged one above the other, the steel strip passes between the two first calendering rollers to remove water stains and perform preliminary calendering; The second cleaning mechanism performs a second water wash on the steel strip; The second-pass calendering mechanism comprises two second calendering rollers arranged one above the other, and the steel strip after the second-pass cleaning passes between the two second calendering rollers to remove water stains and undergo the second-pass calendering; Annealing mechanism, annealing the steel strip after the second rolling process; A three-pass calendering mechanism includes two third calendering rollers arranged one above the other, and the annealed steel strip passes between the two third calendering rollers to perform three-pass calendering; And the winding mechanism is used to wind up the steel strip after three rolling processes.

[0007] Optionally, the first cleaning mechanism comprises a cleaning tank, an ultrasonic transducer is arranged at the bottom of the water storage tank, the ultrasonic transducer is connected to an ultrasonic generator, the steel strip is fed from the feeding mechanism into the cleaning tank, and the steel strip is cleaned by ultrasonic waves in the cleaning tank; The second cleaning mechanism comprises a spray chamber, a plurality of spray heads are arranged in the spray chamber, and the spray chamber cleans the steel strip by spraying.

[0008] Optionally, the first calendering roller and the second calendering roller are both convex rollers with a middle diameter of the roller surface larger than the edge diameter. The steel strip width is W, and the roller gap convexity is C. The roller gap convexity of the first calendering roller is C=0.05%-0.1%×W, and the roller gap convexity of the second calendering roller is C=0.01%-0.05%×W.

[0009] Optionally, the three-pass calendering mechanism further includes a front extension component, which includes a plurality of transfer rollers arranged at intervals, and the plurality of transfer rollers keep the steel strip in a tensioned state.

[0010] Optionally, the transfer roller is an eccentric roller, and the eccentric roller is connected to a restoring elastic member for controlling the adjacent eccentric roller to move in the vertical direction in reverse.

[0011] Optionally, the front extension assembly further comprises positioning columns arranged on both sides of the eccentric roller, a movable groove is provided on the positioning columns along the vertical direction, and movable blocks movable in the movable groove are provided at both ends of the eccentric roller.

[0012] Optionally, a guide column is further provided in the movable groove, and the movable block is sleeved on the guide column.

[0013] Optionally, the restoring elastic member is a spring arranged in the movable groove, and the spring is sleeved on the guide column.

[0014] In a second aspect, the present application provides an automated production method for stainless steel strips, which adopts the following technical solution: An automated production method for stainless steel strips, using the automated production line for stainless steel strips, comprises the following steps: S1, unwinding, the stainless steel strip is sent out through the unwinding mechanism; S2, preliminary cleaning, the unrolled steel strip is sent into a water tank and cleaned by ultrasonic wave; S3, preliminary calendering, calendering the steel strip after preliminary cleaning by two first calendering rollers symmetrically arranged up and down to remove water stains on the surface of the steel strip; S4, secondary cleaning, spraying the steel strip after preliminary rolling for secondary water washing; S5, second calendering, performing second calendering on the steel strip after the second cleaning through two second calendering rollers symmetrically arranged up and down to remove water stains on the surface of the steel strip; S6, annealing, annealing the steel strip after the second rolling process in an annealing furnace to reduce the hardness of the steel strip; S7, three-pass rolling, performing three-pass rolling on the annealed steel strip by two third rolling rollers symmetrically arranged up and down; S8. Roll up.

[0015] Optionally, in S6, local heating is performed on both side edges of the steel strip.

[0016] In summary, the present application includes at least one of the following beneficial effects: 1. Through three rolling steps, the steel strip can be gradually extended, effectively alleviating the "wrinkle" phenomenon at the edge of the steel strip; 2. The first calendering roller and the second calendering roller are convex rollers with decreasing convexity, which can guide the extension of the steel strip; 3. The eccentric roller drives the steel belt to be transported forward, so that the traction force received by the steel belt is not a constant force, but a variable traction force, thus breaking the critical state of static friction and dynamic friction of the steel belt during the transmission process and improving the extension effect; 4. The eccentric roller cooperates with the spring to realize flexible adjustment of the conveying speed between the feeding mechanism and the winding mechanism to avoid excessive tension or loosening of the steel belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structural diagram of the stainless steel strip production line; Figure 2 It is a schematic diagram of the feeding mechanism, the first cleaning mechanism, the preliminary calendering mechanism, the second cleaning mechanism and the second calendering mechanism in the stainless steel strip production line; Figure 3 It is a schematic diagram of the structure of the three-stage rolling mechanism and the winding mechanism in the stainless steel strip production line; Figure 4 It is a side view of the three-stage rolling mechanism and the winding mechanism in the stainless steel strip production line; Figure 5 yes Figure 4 Schematic diagram of the structure of AA; Figure 6 yes Figure 4 Cross-sectional structure diagram of BB.

[0018] Explanation of the reference numerals in the accompanying drawings: 1. feeding mechanism; 11. feeding roller; 2. first cleaning mechanism; 21. cleaning tank; 3. preliminary calendering mechanism; 31. first calendering roller; 4. second cleaning mechanism; 41. spray chamber; 5. second calendering mechanism; 51. second calendering roller; 6. annealing mechanism; 61. annealing furnace; 62. drying box; 7. third calendering mechanism; 71. third calendering roller; 72. front extension assembly; 721. eccentric roller; 7211. movable block; 722. spring; 723. positioning column; 724. movable tank; 725. guide column; 8. winding mechanism; 81. winding roller. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-6 This application is described in further detail. Embodiment 1

[0020] Reference Figure 1 This embodiment discloses an automated production line for stainless steel strips, which is used to perform subsequent calendering processing on the rolled steel strips to remove the "wrinkles" on both sides of the steel strips.

[0021] The stainless steel strip automated production line comprises a feeding mechanism 1, a first cleaning mechanism 2, a preliminary rolling mechanism 3, a second cleaning mechanism 4, a second rolling mechanism 5, an annealing mechanism 6, a third rolling mechanism 7, and a winding mechanism 8 which are arranged in sequence.

[0022] Reference Figure 2 The stainless steel strip is fed out through the feeding mechanism 1, and then successively passes through the first cleaning mechanism 2, the preliminary calendering mechanism 3, the second cleaning mechanism 4 and the second calendering mechanism 5 for two cleaning and calendering, and then passes through the annealing mechanism 6 for annealing, and then passes through the third calendering mechanism 7 for calendering of the tail end, and finally passes through the winding mechanism 8 for winding.

[0023] Specifically, the feeding mechanism 1 includes a feeder, on which a feeding roller 11 is provided. The feeding roller 11 is driven to rotate by a feeding motor, thereby driving the steel strip that has been pre-rolled and wound to rotate for feeding.

[0024] The first cleaning mechanism 2 includes a cleaning tank 21, in which an ultrasonic transducer is arranged, and the ultrasonic transducer is connected to an ultrasonic generator. The steel strip fed by the feeding mechanism 1 is fed into the cleaning tank 21, and ultrasonic cleaning is used to remove dust and / or other impurities on the surface of the steel strip. Ultrasonic cleaning can be used to clean the steel strip more thoroughly.

[0025] The preliminary calendering mechanism 3 includes two symmetrically arranged first calendering rollers 31, both of which are convex rollers with a diameter in the middle of the roller surface larger than the diameter at the edge of the roller surface. The steel strip width is W, the roller gap convexity is C, and the roller gap convexity C of the first calendering roller 31 is 0.05%-0.1%×W. If the steel strip width is 1000mm, the roller gap convexity is 0.5mm-1mm, that is, the diameter in the middle of the roller surface is 0.5mm-1mm larger than the diameter at the edge of the roller surface. The steel strip washed by the first cleaning mechanism 2 enters the preliminary calendering mechanism 3 for preliminary calendering. The convexity setting of the first calendering roller 31 allows the steel strip to extend outward along the roller surface, and the water stains on the surface of the steel strip can be removed by the extrusion of the first calendering roller 31.

[0026] The second cleaning mechanism 4 includes a spray chamber 41, which has an inlet for the steel strip to enter and an outlet for the steel strip to be sent out. At the same time, a plurality of spray devices are arranged in the spray chamber 41 along the direction of the steel strip. The steel strip after preliminary calendering by the first calendering roller 31 enters the spray chamber 41 for spray cleaning, and then is sent out of the spray chamber 41 through the outlet. The secondary cleaning of the steel strip by spraying can generate a water flow impact force on the steel strip, thereby further removing dust on the surface of the steel strip.

[0027] The two-pass calendering mechanism 5 includes two second calendering rollers 51 symmetrically arranged in the upper and lower parts. Both second calendering rollers 51 are convex rollers whose diameter in the middle of the roller surface is larger than the diameter at the edge of the roller surface, and the convexity of the second calendering roller 51 is smaller than that of the first calendering roller 31. Let the width of the steel strip be W, the convexity of the roller gap be C, and the convexity of the roller gap of the second calendering roller 51 is C=0.01%-0.05%×W. If the width of the steel strip is 1000mm, the convexity of the roller gap is 0.1mm-0.5mm, that is, the diameter in the middle of the roller surface is 0.1mm-0.5mm larger than the diameter at the edge of the roller surface. Since the convexity of the second calendering roller 51 is smaller than that of the first calendering roller 31, the steel strip can be gradually extended outward along the roller surface direction after being squeezed by the first calendering roller 31 and the second calendering roller 51 successively, which can play a gradual guiding effect on the extension of both sides of the steel strip, and effectively reduce the "wrinkle" phenomenon at the edge of the steel strip. The steel strip washed with water by the second cleaning mechanism 4 enters the second rolling mechanism 5 for second rolling, which can also substantially remove water stains on the surface of the steel strip.

[0028] Reference Figure 1 The annealing mechanism 6 includes an annealing furnace 61, and the steel strip is fed into the annealing furnace 61 to anneal the steel strip. The annealing process is a commonly used production process in the mechanical field, so the specific principles and mechanisms are not described in detail. In particular, the edge temperature in the annealing furnace 61 is usually lower than the temperature in the middle. The present application adds a heating device for the edge of the steel strip in the annealing furnace 61, such as an induction heating coil, to locally supplement the temperature of the edge of the steel strip and reduce the temperature difference between the edge and the middle of the steel strip. The annealed steel strip can reduce the hardness of the material and facilitate the subsequent final rolling.

[0029] It should be noted that in order to fully remove moisture from the steel strip before entering the annealing furnace 61, a drying box 62 is provided in front of the annealing furnace 61. After entering the drying box 62, the steel strip can be dried to remove moisture for subsequent annealing.

[0030] Reference Figure 3 The three-pass calendering mechanism 7 includes a plurality of sets of third calendering rollers 71 arranged vertically, and the roller surface diameters of the third calendering rollers 71 are consistent. The calendering of the plurality of sets of third calendering rollers 71 can extend the steel strip for the third time, thereby completely eliminating the "wrinkle" phenomenon at the edge of the steel strip.

[0031] Reference Figure 3 and Figure 4 At the same time, in order to improve the rolling effect of the annealed steel strip, the three-pass rolling mechanism 7 also includes a pre-extension assembly 72 arranged before the third rolling roller 71. The pre-extension assembly 72 can extend the steel strip before entering the third rolling roller 71, give the steel strip a pre-pressure, and keep the steel strip in a tensioned state.

[0032] Reference Figure 4 , Figure 5 and Figure 6 Specifically, the front extension assembly 72 includes a plurality of transfer rollers arranged at intervals, and the plurality of transfer rollers keep the steel belt in a tensioned state. In the embodiment of the present application, the transfer roller is an eccentric roller 721, and the distance between the roller surface center of the overall eccentric roller 721 and the rotation center of the eccentric roller 721 does not exceed 1 / 4 of the roller surface radius of the eccentric roller 721. The front extension assembly 72 also includes positioning columns 723 arranged on both sides of the eccentric roller 721, and a movable groove 724 is provided on the positioning column 723 in the vertical direction, and movable blocks 7211 that can move up and down in the movable groove 724 are provided at both ends of the eccentric roller 721.

[0033] Furthermore, a vertically arranged guide column 725 is provided in the positioning column 723, and the movable block 7211 is sleeved on the guide column 725 and slides through the guide column 725. A restoring elastic member is also provided in the guide column 725, and the restoring elastic member is a spring 722 wound around the guide column 725, one end of the spring 722 abuts against the movable block 7211, and the other end abuts against one end of the positioning column 723. The forces acting on the two adjacent eccentric rollers 721 by the spring 722 are in opposite directions.

[0034] The steel belt passes through the eccentric roller 721 during the conveying process, and the eccentric roller 721 drives the steel belt to be conveyed forward, so that the traction force received by the steel belt is not a constant force, but a variable traction force, thereby breaking the critical state of static friction and dynamic friction of the steel belt during the transmission process and realizing flexible adjustment.

[0035] The winding mechanism 8 includes a winding roller 81 and a winding motor. The winding motor drives the winding roller 81 to rotate, thereby winding the steel strip onto the winding roller 81 .

[0036] As the winding motor drives the winding roller 81 to wind up the steel strip, the steel strip will be continuously wound around the winding roller 81, and the diameter of the steel strip rolled up on the winding roller 81 will continue to increase. If the speed of the winding roller 81 remains unchanged, the winding speed of the steel strip will continue to increase. Similarly, the diameter of the steel strip on the feeding roller 11 will continue to decrease as the steel strip is continuously fed out. If the speed of the feeding roller 11 remains unchanged, the feeding speed of the steel strip will continue to decrease. Through the cooperation of the eccentric roller 721 and the spring 722, the feeding speed and the winding speed can be balanced to avoid the influence of the inconsistent winding speed and feeding speed on the quality of the steel strip. Embodiment 2

[0037] Embodiment 2 of the present application discloses an automated production method for stainless steel strip, comprising the following steps: S1. Place the rolled steel strip on the feeding roller 11, and drive the feeding roller 11 to rotate through the feeding motor to feed the steel strip;

[0038] S2. The delivered steel strip is sent into a cleaning tank 21, and the dust on the surface of the steel strip is removed by ultrasonic cleaning.

[0039] S3, the cleaned steel strip is subjected to the first rolling process, and the upper and lower first rolling rollers 31 squeeze the steel strip to extend the steel strip in the width direction. The first rolling rollers 31 are crown rollers, which guide the extension of the steel strip to both sides.

[0040] S4, sending the steel strip after one rolling process into the spray chamber 41 for spraying to complete the second cleaning process.

[0041] S5, the steel strip after the second cleaning is subjected to the second rolling, and the two sets of second rolling rollers 51 squeeze the steel strip to extend the steel strip in the width direction. The second rolling roller 51 is a convex roller with a convexity greater than or less than the first rolling roller 31, and can also play a guiding effect on the extension of the steel strip to both sides.

[0042] S6. The steel strip after the second rolling is dried and sent to the annealing furnace 61 for annealing. The heating device at the edge of the steel strip in the annealing furnace 61, such as an induction heating coil, locally supplements the temperature of the edge of the steel strip to avoid affecting the production quality of the steel strip due to the temperature difference between the middle and the edge of the steel strip.

[0043] S7. The annealed steel strip is subjected to a third rolling process at the tail end, and the steel strip is tensioned and pre-stretched before the third rolling process. Specifically, a plurality of eccentric rollers 721 are used to apply varying tensile forces to the steel strip, so that the critical state of static friction and dynamic friction between the steel strip and the conveying roller is changed, thereby achieving flexible adjustment.

[0044] S8. The steel strip after three rolling processes is rolled up by means of the winding roller 81 in cooperation with the winding motor.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automated production line for stainless steel strips, characterized in that: Including the following settings: A feeding mechanism (1) for unwinding the stainless steel strip; A first cleaning mechanism (2) for washing the steel strip with water; A preliminary calendering mechanism (3) comprising two first calendering rollers (31) arranged one above the other, the steel strip passing between the two first calendering rollers (31) to remove water stains and perform preliminary calendering; A second cleaning mechanism (4) performs a second water wash on the steel strip; A second-pass calendering mechanism (5) comprising two second calendering rollers (51) arranged one above the other, wherein the steel strip that has been cleaned in the second pass passes between the two second calendering rollers (51) to remove water stains and undergo second-pass calendering; An annealing mechanism (6) is used to anneal the steel strip after the second rolling process; A three-pass calendering mechanism (7) comprising two third calendering rollers (71) arranged one above the other, wherein the annealed steel strip passes between the two third calendering rollers (71) to undergo three-pass calendering; and a winding mechanism (8) for winding the steel strip that has been rolled in three passes.

2. The automatic production line for stainless steel strip according to claim 1, characterized in that: The first cleaning mechanism (2) comprises a cleaning tank (21), an ultrasonic transducer is arranged at the bottom of the cleaning tank (21), the ultrasonic transducer is connected to an ultrasonic generator, the steel strip is fed from the feeding mechanism (1) into the cleaning tank (21), and the steel strip is cleaned by ultrasonic waves in the cleaning tank (21); The second cleaning mechanism (4) comprises a spray chamber (41), wherein a plurality of spray heads are arranged in the spray chamber (41), and the spray chamber (41) cleans the steel strip by spraying.

3. The automatic production line for stainless steel strip according to claim 1, characterized in that: The first calendering roller (31) and the second calendering roller (51) are both convex rollers whose middle diameter is larger than the edge diameter. The steel strip width is W and the roller gap convexity is C. The roller gap convexity C of the first calendering roller (31) is 0.05%-0.1%×W, and the roller gap convexity C of the second calendering roller (51) is 0.01%-0.05%×W.

4. The automatic production line for stainless steel strip according to claim 1, characterized in that: The three-pass calendering mechanism (7) further comprises a front extension assembly (72), wherein the front extension assembly (72) comprises a plurality of transfer rollers arranged at intervals, wherein the plurality of transfer rollers keep the steel strip in a tensioned state.

5. The automatic production line for stainless steel strip according to claim 4, characterized in that: The transfer roller is an eccentric roller (721), and the eccentric roller (721) is connected to a restoring elastic member for controlling the adjacent eccentric roller (721) to move in the opposite direction in the vertical direction.

6. The automatic production line for stainless steel strip according to claim 5, characterized in that: The front extension assembly (72) further comprises positioning columns (723) arranged on both sides of the eccentric roller (721), a movable groove (724) being provided on the positioning columns (723) in a vertical direction, and movable blocks (7211) movable in the movable groove (724) are provided at both ends of the eccentric roller (721).

7. The automatic production line for stainless steel strip according to claim 6, characterized in that: A guide column (725) is also provided in the movable groove (724), and the movable block (7211) is sleeved on the guide column (725).

8. The automatic production line for stainless steel strip according to claim 7, characterized in that: The restoring elastic member is a spring (722) disposed in the movable groove (724), and the spring (722) is sleeved on the guide column (725).

9. An automated production method for stainless steel strip, characterized in that: The automated production line for stainless steel strip according to any one of claims 1 to 8 comprises the following steps: S1, unwinding, the stainless steel strip is sent out through the unwinding mechanism; S2, preliminary cleaning, the unrolled steel strip is sent into a water tank and cleaned by ultrasonic wave; S3, preliminary calendering, calendering the steel strip after preliminary cleaning by two first calendering rollers (31) symmetrically arranged up and down to remove water stains on the surface of the steel strip; S4, secondary cleaning, spraying the steel strip after preliminary rolling for secondary water washing; S5, second calendering, performing second calendering on the steel strip after the second cleaning by two second calendering rollers (51) symmetrically arranged up and down, and removing water stains on the surface of the steel strip; S6, annealing, annealing the steel strip after the second rolling process in an annealing furnace (61) to reduce the hardness of the steel strip; S7, three-pass rolling, performing three-pass rolling on the annealed steel strip by two third rolling rollers (71) symmetrically arranged up and down; S8. Roll up.

10. The method for automated production of stainless steel strip according to claim 9, characterized in that: In S6, local heating is performed on both sides of the steel strip.

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