A stainless steel strip automated production line and production method

Abstract

The present application relates to the technical field of stainless steel strip production, improves the current problem of poor steel strip production quality, and discloses an automated production line and production method for stainless steel strip, comprising: a feeding mechanism; a first cleaning mechanism; a preliminary rolling mechanism, comprising two first rolling rollers arranged above and below, for preliminary rolling the steel strip; a second cleaning mechanism; a second rolling mechanism, comprising two second rolling rollers arranged above and below, between which the steel strip, after the second rolling, passes through to remove water stains and undergoes a second rolling; an annealing mechanism, which anneals the steel strip after the second rolling; a third rolling mechanism, comprising two third rolling rollers arranged above and below, between which the annealed steel strip passes for a third rolling; and a winding mechanism, which winds up the steel strip after the third rolling. The present application can remove the "wrinkles" on the surface of the steel strip and improve the production quality of the stainless steel strip.

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 and then perform secondary rolling.

[0004] Because the current production process compresses and deforms the raw material through only a second rolling process, the steel strip stretches and elongates laterally during the deformation process. The applicant discovered during actual product production that this can easily lead to wrinkles on both sides of the steel strip, which in turn affects product quality. 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 a first aspect, the present application provides an automated production line for stainless steel strips, which adopts the following technical solutions:

[0007] An automated production line for stainless steel strips, comprising:

[0008] Feeding mechanism, used for unwinding stainless steel strip;

[0009] The first cleaning mechanism washes the steel strip with water;

[0010] A preliminary calendering mechanism includes two first calendering rollers arranged one above the other, and the steel strip passes between the two first calendering rollers to remove water stains and perform preliminary calendering;

[0011] The second cleaning mechanism performs a second water wash on the steel strip;

[0012] The second-pass calendering mechanism includes two second calendering rollers arranged one above the other. The steel strip after the second cleaning passes between the two second calendering rollers to remove water stains and undergoes the second calendering.

[0013] Annealing mechanism, annealing the steel strip after the second rolling;

[0014] The three-pass rolling mechanism includes two third rolling rollers arranged one above the other, and the annealed steel strip passes between the two third rolling rollers to undergo three-pass rolling;

[0015] And the winding mechanism is used to wind up the steel strip that has been rolled in three stages.

[0016] Optionally, the first cleaning mechanism includes a cleaning tank, an ultrasonic transducer is provided 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;

[0017] The second cleaning mechanism includes a spray chamber, wherein a plurality of spray heads are arranged in the spray chamber, and the spray chamber cleans the steel strip by spraying.

[0018] 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 convex is C. The roller gap convexity C of the first calendering roller is 0.05%-0.1%×W, and the roller gap convexity C of the second calendering roller is 0.01%-0.05%×W.

[0019] 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.

[0020] Optionally, the transfer roller is an eccentric roller, and the eccentric roller is connected to a restoring elastic member for controlling the adjacent eccentric rollers to move in the vertical direction in reverse.

[0021] Optionally, the front extension assembly further includes 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 that can move in the movable groove are provided at both ends of the eccentric roller.

[0022] Optionally, a guide column is further provided in the movable groove, and the movable block is sleeved on the guide column.

[0023] Optionally, the restoring elastic member is a spring arranged in the movable groove, and the spring is sleeved on the guide column.

[0024] In a second aspect, the present application provides an automated production method for stainless steel strips, which adopts the following technical solutions:

[0025] An automated production method for stainless steel strips, using the above-mentioned automated production line for stainless steel strips, comprises the following steps:

[0026] S1, unwinding, the stainless steel strip is sent out through the unwinding mechanism;

[0027] S2. Preliminary cleaning: the unwound steel strip is sent into a water tank and cleaned by ultrasonic waves;

[0028] S3, preliminary calendering, using two first calendering rollers symmetrically arranged above and below to calender the preliminarily cleaned steel strip and remove water stains on the surface of the steel strip;

[0029] S4, secondary cleaning, spraying the steel strip after preliminary rolling for secondary water washing;

[0030] S5, second rolling, the steel strip after the second cleaning is rolled by two second rolling rollers symmetrically arranged above and below to remove water stains on the surface of the steel strip;

[0031] S6, annealing, annealing the steel strip after the second rolling process in an annealing furnace to reduce the hardness of the steel strip;

[0032] S7, three-pass rolling, performing three-pass rolling on the annealed steel strip by two third rolling rollers symmetrically arranged above and below;

[0033] S8. Roll up.

[0034] Optionally, in S6, local heating is performed on both sides of the steel strip.

[0035] In summary, this application has at least one of the following beneficial effects:

[0036] 1. Through three rolling steps, the steel strip can be gradually extended, effectively reducing the "wrinkle" phenomenon at the edge of the steel strip;

[0037] 2. The first calendering roll and the second calendering roll are crowned rolls with decreasing crowns, which can guide the extension of the steel strip;

[0038] 3. The eccentric roller drives the steel belt forward, so that the traction force received by the steel belt is not constant, but a variable traction force, thus breaking the critical state of static friction and dynamic friction during the transmission process of the steel belt and improving the extension effect;

[0039] 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

[0040] Figure 1 It is a schematic diagram of the overall structure of the stainless steel strip production line;

[0041] Figure 2 It is a schematic diagram of the feeding mechanism, the first cleaning mechanism, the preliminary rolling mechanism, the second cleaning mechanism and the second rolling mechanism in the stainless steel strip production line;

[0042] Figure 3 This is a schematic diagram of the structure of the three-stage rolling mechanism and the winding mechanism in the stainless steel strip production line;

[0043] Figure 4It is a side view of the three-stage rolling mechanism and the winding mechanism in the stainless steel strip production line;

[0044] Figure 5 yes Figure 4 Schematic diagram of the structure of AA;

[0045] Figure 6 yes Figure 4 Cross-sectional structural diagram of the BB.

[0046] Explanation of the accompanying symbols: 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

[0047] The following is combined with Figure 1-6 This application is described in further detail. Example 1

[0048] 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.

[0049] The stainless steel strip automated production line includes 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.

[0050] Reference Figure 2 The stainless steel strip is fed out through the feeding mechanism 1, and then 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 the tail end, and finally passes through the winding mechanism 8 for winding.

[0051] 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.

[0052] The first cleaning mechanism 2 includes a cleaning tank 21, in which an ultrasonic transducer is provided. 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 clean the steel strip more thoroughly.

[0053] The preliminary calendering mechanism 3 comprises two symmetrically positioned first calendering rollers 31, each crowned with a larger diameter at the center of the roller surface than at the edge. The strip width is W, and the roll gap crown is C. The roll gap crown of the first calendering rollers 31 is C = 0.05%-0.1% × W. For a strip width of 1000 mm, the roll gap crown is 0.5-1 mm, meaning the roll diameter at the center of the roller surface is 0.5-1 mm larger than the roll edge diameter. After being washed by the first cleaning mechanism 2, the strip enters the preliminary calendering mechanism 3 for preliminary calendering. The crown of the first calendering rollers 31 allows the strip to stretch outward along the roller surface. The compression of the first calendering rollers 31 also removes any water stains from the strip surface.

[0054] 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 rolling by the first rolling roller 31 enters the spray chamber 41 for spray cleaning, and is then sent out of the spray chamber 41 through the outlet. The use of spraying for secondary cleaning of the steel strip can generate water flow impact on the steel strip, further removing dust on the surface of the steel strip.

[0055] The second-stage calendering mechanism 5 includes two second calendering rollers 51, symmetrically arranged above and below. Both second calendering rollers 51 are crowned rollers with a larger diameter at the center of the roller surface than at the edge. The crown of the second calendering rollers 51 is smaller than that of the first calendering roller 31. Let W be the strip width and C be the roll gap crown. The roll gap crown of the second calendering rollers 51 is 0.01%-0.05% × W. For a strip width of 1000 mm, the roll gap crown is 0.1-0.5 mm, meaning the roll diameter at the center of the roller surface is 0.1-0.5 mm larger than the roll edge diameter. Because the crown of the second calendering rollers 51 is smaller than that of the first calendering roller 31, the strip gradually expands outward along the roller surface after being squeezed by the first and second calendering rollers 31 and 51, gradually guiding the expansion of the strip on both sides and effectively reducing the "wrinkling" phenomenon at the strip edge. The steel strip washed with water by the second cleaning mechanism 4 enters the second rolling mechanism 5 for second rolling, which can also basically remove water stains on the surface of the steel strip.

[0056] Reference Figure 1The 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 production process commonly used in the mechanical field, so the specific principles and mechanisms will not be 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 heat 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.

[0057] 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.

[0058] Reference Figure 3 The three-pass rolling mechanism 7 includes multiple sets of third rolling rollers 71 arranged vertically. The roller surfaces of the third rolling rollers 71 have a uniform diameter. The rolling of the multiple sets of third rolling rollers 71 allows the steel strip to be stretched a third time, thereby completely eliminating the "wrinkles" at the edges of the steel strip.

[0059] 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 between the third rolling rollers 71, giving the steel strip a pre-pressure and keeping the steel strip in a tensioned state.

[0060] Reference Figure 4 、 Figure 5 and Figure 6 Specifically, the front extension assembly 72 includes a plurality of transfer rollers arranged at intervals, which 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 center of the roller surface of the overall eccentric roller 721 and the center of rotation of the eccentric roller 721 does not exceed 1 / 4 of the radius of the roller surface of the eccentric roller 721. The front extension assembly 72 also includes positioning columns 723 arranged on both sides of the eccentric roller 721. The positioning columns 723 are provided with movable grooves 724 in the vertical direction. The two ends of the eccentric roller 721 are provided with movable blocks 7211 that can move up and down within the movable grooves 724.

[0061] Furthermore, a vertically arranged guide post 725 is disposed within the positioning post 723. The movable block 7211 is sleeved on the guide post 725 and slides therethrough. A restoring elastic member is also disposed within the guide post 725. This restoring elastic member is a spring 722 wound around the guide post 725. One end of the spring 722 abuts against the movable block 7211, and the other end abuts against one end of the positioning post 723. The forces acting on adjacent eccentric rollers 721 by the spring 722 are directed in opposite directions.

[0062] During the conveying process, the steel belt passes through the eccentric roller 721, which drives the steel belt 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.

[0063] 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 .

[0064] As the winding motor drives the winding roller 81 to wind the steel strip, the strip continuously wraps around it. The diameter of the steel strip wound on the winding roller 81 increases continuously. If the speed of the winding roller 81 remains constant, the winding speed of the steel strip increases continuously. Similarly, the diameter of the steel strip on the feed roller 11 decreases continuously as the strip is fed out. If the speed of the feed roller 11 remains constant, the feeding speed decreases continuously. The coordination of the eccentric roller 721 and the spring 722 allows for a balanced adjustment of the feeding and winding speeds, preventing the quality of the steel strip from being affected by an inconsistency between the winding and feeding speeds. Example 2

[0065] The second embodiment of the present application discloses an automated production method for stainless steel strips, comprising the following steps:

[0066] S1. Place the rolled steel strip on the feed roller 11, and drive the feed roller 11 to rotate by the feed motor to feed the steel strip.

[0067] S2. The delivered steel strip is sent into a cleaning tank 21, and dust on the surface of the steel strip is removed by ultrasonic cleaning.

[0068] S3: The cleaned steel strip is subjected to the first rolling process. The upper and lower first rolling rollers 31 squeeze the steel strip to extend it in the width direction. The first rolling rollers 31 are crown rollers, which guide the extension of the steel strip in both directions.

[0069] S4. The steel strip after the first rolling is sent to the spray chamber 41 for spraying to complete the second cleaning.

[0070] S5: The steel strip, after the second cleaning, undergoes a second rolling process. Two sets of second rolling rollers 51 squeeze the steel strip, extending it in the width direction. The second rolling rollers 51 are crowned rollers with a greater crown than the first rolling rollers 31, and can also guide the steel strip in both directions.

[0071] 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 the temperature difference between the middle and edge of the steel strip affecting the production quality of the steel strip.

[0072] 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 changes, thereby achieving flexible adjustment.

[0073] S8. The steel strip after three rolling processes is wound up by means of the winding roller 81 in cooperation with the winding motor.

[0074] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automated production line for stainless steel strips, characterized by: 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) comprises two first calendering rollers (31) arranged one above the other, and the steel strip passes between the two first calendering rollers (31) to remove water stains and perform preliminary calendering; The second cleaning mechanism (4) performs a second water washing on the steel strip; A second-pass calendering mechanism (5) includes two second calendering rollers (51) arranged one above the other, and 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; Annealing mechanism (6), annealing the steel strip after the second rolling process; A three-pass rolling mechanism (7) includes two third rolling rollers (71) arranged one above the other, and the annealed steel strip passes between the two third rolling rollers (71) to undergo three-pass rolling; and a winding mechanism (8) for winding the steel strip after the three rolling steps; The three-pass rolling mechanism (7) further includes a front extension assembly (72), the front extension assembly (72) includes a plurality of transfer rollers arranged at intervals, the plurality of transfer rollers keep the steel strip in a tensioned state, the transfer rollers are eccentric rollers (721), and the eccentric rollers (721) are connected to restoring elastic members for controlling the adjacent eccentric rollers (721) to move in opposite directions in the vertical direction.

2. The automated production line for stainless steel strip according to claim 1, characterized in that: The first cleaning mechanism (2) includes a cleaning tank (21), an ultrasonic transducer is provided at the bottom of the cleaning tank (21), and 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 automated 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 with a diameter in the middle of the roller surface being larger than a diameter at the edge. 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 automated production line for stainless steel strip according to claim 1, 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) being provided at both ends of the eccentric roller (721).

5. The automated production line for stainless steel strip according to claim 4, characterized in that: A guide post (725) is further provided in the movable groove (724), and the movable block (7211) is sleeved on the guide post (725).

6. The automated production line for stainless steel strip according to claim 5, 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).

7. A method for automated production of stainless steel strip, characterized by: The automated production line for stainless steel strips according to any one of claims 1 to 6 comprises the following steps: S1, unwinding, the stainless steel strip is sent out through the unwinding mechanism; S2. Preliminary cleaning: the unwound steel strip is sent into a water tank and cleaned by ultrasonic waves; S3, preliminary calendering, using two first calendering rollers (31) symmetrically arranged above and below to calender the steel strip that has been preliminarily cleaned and 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 rolling, performing second rolling on the steel strip after the second cleaning by two second rolling rollers (51) symmetrically arranged above and below, 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 above and below; S8. Roll up.

8. The method for automated production of stainless steel strip according to claim 7, characterized in that: In S6, local heating is performed on both sides of the steel strip.

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