CN107803402A - A kind of cold-rolled steel sheet preparation method for high-end equipment manufacturing - Google Patents

Abstract

The invention discloses a method for preparing a cold-rolled steel plate used in the manufacture of high-end equipment. The method includes: uncoiling a target plate body or transporting it to a first tension driving roller through a conveying device; The body is transported to the first rough roll for rough rolling; the second rough roll is used for the second rough rolling of the target plate; the first finish roll is used for the finish rolling of the target plate; the second finish roll is used for the second finish rolling of the target plate Secondary finish rolling, wherein the surface roughness of the first and second finish rolls is smaller than that of the first and second rough rolls. The method of the present invention is used in conjunction with rough rolling and finishing rolling, which can not only ensure the appropriate reduction of the steel plate, but also ensure the smoothness of the surface, and eliminate the internal stress of the steel plate as much as possible.

Description

A preparation method of cold-rolled steel plate for high-end equipment manufacturing

technical field

The invention relates to the field of steel preparation, in particular to a method for preparing cold-rolled steel sheets used in the manufacture of high-end equipment.

Background technique

Steel is an important raw material in current industrial production. In 1990, SMS Company built the production line of Compact Strip Production Process (CSP) for the first time, and formed a production scale, achieving remarkable production effects and good economic benefits. The CSP process is characterized by stable operation and simple equipment structure; high production output, capable of producing low-carbon steel, structural steel, high-strength low-alloy steel, spring steel, pipeline steel, tool steel, oriented or non-oriented silicon steel, stainless steel and wear-resistant Steel and other ordinary continuous casting machines can cast all steel types; the process flow is: electric furnace - refining furnace - thin slab continuous casting machine - heat preservation soaking furnace - hot continuous rolling mill - laminar cooling - coiling.

The hot-rolled strip product is used as the blank for cold-rolling ordinary cold-rolled thin steel plate, and its thickness is generally 1.5-6mm. The production process of cold-rolled strip is: hot-rolled coil (uncoiler)—pickling unit—cold tandem mill—degreasing process—annealing furnace—tempering machine—shearing machine—bundling (curling) machine—storage . Before the cold-rolled billet enters the rolling mill, it must be pickled to remove the oxide scale on the surface, so as to ensure the smooth surface of the strip steel and smoothly realize cold rolling and its subsequent processes. The strip steel after the pickling unit enters the rolling mill to start rolling. Due to the characteristics of the cold rolling process, there is lubricating grease on the surface of the strip steel during the rolling process. The grease will volatilize after heating, and the volatilized residue stays on the surface of the strip steel. It is difficult to remove the black spots formed on the surface. Therefore, before the rolled steel strip enters the annealing process, the grease on the surface of the strip steel must be cleaned through a degreasing process. After the degreased steel strip is annealed in an annealing furnace with a protective atmosphere, the surface of the strip steel is bright, and the strip steel after cold rolling and annealing must be leveled to adjust the properties and obtain a uniform thickness and a smooth and smooth surface.

Contents of the invention

In view of the above problems, the present invention provides a method for preparing cold-rolled steel sheets for high-end equipment manufacturing, which is characterized in that the method includes: uncoiling the target plate body or transporting the plate-type steel plate to the first tension by a conveying device drive roller;

Transporting the target plate body to the first rough roll through the first rough roll for rough rolling;

Carrying out secondary rough rolling to the target plate body by using the second rough rolling roll;

Using the first finishing roll to finish rolling the target plate body;

The second finishing roll is used to perform secondary finish rolling on the target plate body, wherein the surface roughness of the first and second finishing rolls is smaller than that of the first and second rough rolling rolls.

Preferably, the method further includes pickling the target plate body with a pickling machine before cold rolling.

Preferably, the method further includes measuring the exit speed and distance of the cold-rolled strip output from the fourth finishing roll by using the follower speed measuring roll.

Preferably, the cold rolling is carried out by the following equipment, the cold-rolled steel plate preparation equipment includes: uncoiling device, first tension driving roll, first rough rolling roll, second rough rolling roll, third finishing rolling roll, fourth finishing rolling roll, second Tension drive roller and third follower speed measuring roller.

In a preferred implementation manner, each of the first rough roll, the second rough roll, the third finish roll, and the fourth finish roll includes two rolls up and down, and the two rolls are opposite to each other; the first tension drive Each of the roll, the second tension drive roll, and the third tach roll includes two drive rolls, an upper and a lower one.

In another preferred implementation manner, the uncoiling device is used to receive the hot-rolled coil output from the hot-rolling program, and unwind and transport the steel plate on the hot-rolled coil to the upper and lower two of the first tension driving roll. between drive rollers;

The first tension driving roller is driven by a motor, and the unrolled hot-rolled steel plate is pushed by the upper and lower driving rollers to be sent between the upper and lower rollers of the first rough rolling roller;

The first rough rolling roll cold-rolls the steel plate with a first predetermined reduction or reduction rate;

The second rough roll is located downstream of the first rough roll, receiving the steel plate after the first round of cold rolling for further rolling, and the distance between the upper and lower rolls of the second rough roll is smaller than the upper and lower rolls of the first rough roll the distance between

The second tension driving roll is arranged between the second rough roll and the first thin roll, and the smoothness of steel plate transmission is ensured by applying a driving force here;

The third fine rolling roll and the fourth fine rolling roll are arranged downstream of the second tension driving roll, and they are respectively used for fine rolling the rough rolled steel plate.

In another preferred implementation manner, the reductions of the first rough roll and the second rough roll are greater than the reductions of the third finish roll and the fourth finish roll.

In another preferred implementation manner, the cold-rolled steel sheet preparation equipment further includes a hot rolling mill and pickling equipment.

In another preferred implementation manner, the pickling equipment includes a first hot-dipping pickling tank, a conveying device, and spray-type supplementary pickling equipment.

In another preferred implementation manner, the roll surface roughness of the third finish roll and the fourth finish roll is smaller than the roll surface roughness of the first rough roll and the second rough roll.

It should be noted that the working state of the first and second tension driving rollers can be adjusted as required. When the cold-rolled plate runs normally under the drive of the cold-rolled roller, the tension driving roller stops providing driving force and changes to follow-up or from the steel plate The surface comes off.

In another preferred implementation mode, the steel plate preparation equipment of the present invention also includes a pickling machine, and the pickling machine includes a first hot-dipping pickling tank, a conveying device, an image acquisition device, a controller, a spray-type supplementary acid The first hot-dip pickling tank is used as the initial pickling, the image acquisition device collects the image of the target steel plate, and recognizes the coordinates of the stains in the image, and the controller controls the spray-type supplementary pickling equipment in the spot Corrosive liquid jetting when reaching under jet supplementary pickling equipment.

Preferably, the spray-type supplementary pickling equipment includes pickling liquid storage equipment, diluent storage equipment, multiple injection ports arranged in arrays, pickling liquid delivery pipes and diluent delivery pipes respectively connected to corresponding storage equipment, the The spray ports arranged in an array are divided into a first part and a second part, the first part is used for pickling, and the second part is used for cleaning. Preferably, the first part of the injection ports arranged in an array includes M*N injection ports, and the M injection ports are arranged perpendicular to the extending direction in N rows, wherein the odd-numbered rows of injection ports and the even-numbered rows of injection ports are arranged alternately. The second part of the spray port is located downstream of the first part, and adopts a loose spray method for more thorough cleaning.

Preferably, the first part of the injection ports is delivered by nested pickling solution, which means that each injection port is a double-layer injection port, which includes a circular outer jet port and an inner jet port, the inner side The jetting port is nested in the outer jetting port, the inner jetting port is connected with the pickling liquid delivery pipe, and the outer jetting port is connected with the diluent delivery pipe.

Preferably, considering that the surface of the steel plate is relatively smooth, oblique diffused light is used to illuminate the steel plate.

Beneficial effect

The preparation method of the cold-rolled steel plate used in the manufacture of high-end equipment of the present invention is used in conjunction with rough rolling and finish rolling, which can not only ensure the appropriate reduction of the steel plate, but also ensure the smoothness of the surface, and eliminate the internal stress of the steel plate as much as possible. The cold-rolled steel plate of the present invention has high precision and good uniformity, and can be applied to automobiles, high-speed rails and even the inner space of aircraft carriers.

In addition, in the preferred implementation mode of the present invention, equipment for pre-processing cold-rolled plates is also provided, including a novel pickling machine of the innovative invention. Adopting the pickling machine of the present invention can not only reduce the damage to the steel plate Corrosion, reducing the time of immersion, and can remove almost all residual oxides on the surface of the steel plate, even the oxide residues that extend deeper.

Description of drawings

Fig. 1 is the schematic structural diagram of the cold-rolled steel plate preparation equipment that the inventive method adopts;

Fig. 2 is a structural schematic diagram of the pickling equipment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and the embodiments thereof, but the protection scope of the present invention is not limited to the scope described in the embodiments.

Cold-rolled steel sheets, especially cold-rolled thin sheets, are generally produced after hot-rolling, and the steel sheets are directly uncoiled from the hot-rolled coils for cold-rolling, and this embodiment is no exception. The present invention is described by taking a cold-rolled thin steel plate (such as SPCC) as an example.

Those skilled in the art should understand that steel needs to be refined before hot rolling. The LF refining furnace can be used to refine the steel, and after refining, hot rolling is carried out to obtain hot rolled coils. In the production process of SPCC cold-rolled thin steel plate, a three-high and one-low hot-rolling process route is adopted. The so-called three-high and one low refers to the high heating temperature, opening temperature and final shaft temperature, while the coiling temperature is low. The heating temperature of the SPCC cold plate before hot rolling is 1200 degrees Celsius. The high heating temperature and a certain holding time ensure that AlN can be completely and uniformly dissolved in the austenite matrix.

The surface of the hot-rolled steel coil obtained by hot rolling has iron oxide scales, which can firmly cover the outer surface of the steel, so that the surface defects of the strip steel are not easy to be found. In order to find and remove the strip steel with surface defects, it is necessary to remove the oxide scale covering the surface of the strip steel before cold rolling, which increases the service life of the cold rolling equipment and improves the quality of the cold rolled plate.

In the production process, choose a 4:1 mixed diluent of hydrochloric acid and sulfuric acid or a diluent of hydrochloric acid supplemented with a corrosion inhibitor for pickling, mainly to remove the oxide scale through dissolution, reduction and mechanical stripping. Compared with hydrochloric acid’s ability to dissolve base iron, hydrochloric acid’s ability to dissolve iron oxide scale is much higher. In order to minimize the loss of iron, pickling with hydrochloric acid is chosen. When the concentration of hydrochloric acid is high, the main way to remove scale is dissolution, and the obtained strip surface quality is relatively good.

Then cold rolling, annealing and tempering can be carried out. The annealing and planarization processes are well known in the art, and are not the innovation of the present invention, so they will not be described in detail here. The following mainly introduces the cold rolling process of the present invention.

Example 1

The preparation method of the cold-rolled steel plate for high-end equipment manufacturing of the present invention includes: uncoiling the target plate body or transporting it to the first tension driving roller through a conveying device;

Transporting the target plate body to the first rough roll through the first rough roll for rough rolling;

Carrying out secondary rough rolling to the target plate body by using the second rough rolling roll;

Using the first finishing roll to finish rolling the target plate body;

The second finishing roll is used to perform secondary finish rolling on the target plate body, wherein the surface roughness of the first and second finishing rolls is smaller than that of the first and second rough rolling rolls.

The method of the present invention is realized by the device in FIG. 1 , and the method will be described below in conjunction with the device.

As shown in Figure 1, the cold rolling preparation equipment includes: uncoiling device 1, first tension drive roll 2, first rough roll 3, second rough roll 4, third finish roll 5, fourth finish roll 6, second tension roll Driving roller 7, the third follow-up speed measuring roller 8. This embodiment is designed when the steel plate has been fully pickled after hot rolling. If the steel plate in the hot-rolled coil has not been fully pickled, it is necessary to add a pickling process after uncoiling.

After the hot rolling procedure is completed, the hot rolled coil is placed on the uncoiling device 1, and the rolled steel plate enters between the first rough rolling roll 3 driven by the first tension driving roll 2. The first rough rolling roll 3 includes two upper and lower opposite Rolls, the distance between the two rolls is less than the thickness of the steel plate. The first rough rolling roll 3 carries out rough rolling to the steel plate, after the rough rolling, the steel plate continues to advance from the right side of the rough rolling roll to the second rough rolling roll 4, and the second rough rolling roll 4 further rough rolls the steel plate.

The second tension drive roll 7 is arranged between the second rough roll 4 and the third finish roll 5 (if the distance between the two rolls is small, the drive roll 7 can be omitted), the second tension drive roll includes two turning rolls, Each rotating roller includes a rotating shaft, a bearing, and a pressure control rod. The upper pressure controlling rod and the lower pressure controlling rod respectively drive the bearing from the upper and lower directions to the middle, and the rotating shaft is rotatably installed in the bearing.

The steel plate enters between the upper and lower finish rolls of the third finish roll 5 under the drive of the second tension drive roll 7 . The finish rolling by the third finishing roll 5 is basically close to the required thickness. Then, the steel plate enters between the fourth finishing rolls 6 for the last rolling procedure to reach a predetermined thickness and meet flatness requirements. The rolling thicknesses of the first rough rolling roll 3 , the second rough rolling roll 4 , the third finish rolling roll 5 , and the fourth finish rolling roll 6 decrease sequentially. The rolled thickness of the first rough roll 3 and the second rough roll 4 accounts for more than 65% of the total cut thickness. The invention can be used to prepare cold-rolled steel plates with a thickness of 0.2-6mm. In addition, for non-coiled hot-rolled sheets, the uncoiling device 1 is replaced by a conveying device. For a cold-rolled steel plate with a thickness of 4mm, the rolling error of the cold-rolling equipment of the present invention can be lower than 0.015mm.

In the present invention, the two-rough and two-finish cold rolling method can not only reduce the cost of the cold rolling mill, but also better ensure the surface smoothness, precision and uniformity of the cold-rolled steel plate.

Under normal circumstances, the rolling kilometers of cold-rolled rolls should not exceed 200km, otherwise the surface quality of cold-rolled sheets will deteriorate and the probability of surface color difference will increase.

After the cold rolling, annealing, leveling, shearing, and bundling are performed according to conventional methods. These processes all adopt conventional methods in the field, and will not be described in detail here.

Example 2

In the production process of cold-rolled steel sheets, one of the factors that will seriously affect the quality of steel sheets is incomplete pickling. In particular, oxides formed on the steel plate after heating and before hot rolling may be partly pressed into the hot rolled plate due to deformation during the hot rolling process. However, the pickling time should not be too long, as the pickling time is too long to easily cause the steel to become brittle and the steel itself to be damaged.

To solve this problem, this embodiment provides a new pickling machine, which can be applied to the cold rolling equipment in Embodiment 1 or used alone.

As shown in Figure 2, the pickling machine of the present embodiment includes a first hot-dipping pickling tank (not shown in the figure), a conveying device 21, an image acquisition device 22, a controller 23, and a spray-type supplementary pickling equipment 24 , A pickling solution storage device 25 and a diluent storage device 26 . The first hot-dipping pickling pool is used for initial pickling. The pickling pool is filled with dilute hydrochloric acid (addition of corrosion inhibitor). After the hot rolling is completed, the hot-rolled plate is first pickled in the pickling pool. The pickling time should not be too long. Too long pickling time will not only affect the efficiency, but also may cause the iron in the cold-rolled steel plate to react with hydrochloric acid, which will affect the composition ratio of the steel plate surface and cause loss, and make the steel brittle.

However, if the pickling is not thorough, there will be residual oxides in individual areas of the cold-rolled sheet, which will affect both the aesthetics and performance of the material, increase the difficulty of subsequent coating or other processing, and lead to the loss of customers.

Therefore, in this embodiment, an image acquisition device and jet-type supplementary pickling equipment are added. The image acquisition device first collects the image of the existing fully pickled hot-rolled plate before the equipment is not in use, and then, when it is officially used , collect the image of the hot-rolled plate in preparation, use the fully pickled hot-rolled plate as a control (this process needs to pay attention to temperature control to avoid color difference caused by temperature difference) and compare or difference with the subsequent hot-rolled plate image to obtain Difference map, if the hot-rolled plate is not thoroughly pickled and oxides remain in the local area, the horizontal and vertical coordinates of this area will be reflected in the difference map, if the pickling is thorough, the image pixel value of the difference map will be lower than a certain threshold, that is, If the color difference is below a certain threshold, it can be considered as no residue. The speed of the conveying device is controlled by the controller. According to the coordinates of the image acquisition device, the coordinates of the residual oxide position in the difference map and the speed of the conveying device, it can be determined when the residual oxide area reaches the bottom of the jet supplementary pickling equipment 24 .

The spray-type supplementary pickling equipment includes a pickling liquid storage, a plurality of spray ports arranged in an array, a pickling liquid delivery pipe, and a diluent delivery pipe (which are respectively connected to the storage device), and the spray ports arranged in an array are divided into The first part and the second part, the first part is used for pickling (located upstream), and the second part is used for cleaning (located downstream of the production line or steel plate). Preferably, the first part of the injection ports arranged in the array includes M*N injection ports (such as 50*30), and the M injection ports are arranged perpendicular to the extension direction and arranged in N rows, wherein the odd-numbered rows of injection ports are connected with the even-numbered rows of injection ports. The nozzles are arranged in a staggered manner, that is, the odd-numbered jet outlets face the gaps between the even-numbered jet nozzles, and the even-numbered jet nozzles face the gaps between the odd-numbered jet nozzles. The second part of the spray port is located downstream of the first part, and adopts a loose spray method for more thorough cleaning.

In order to achieve a better fixed-point pickling effect, the first part of the injection port of the present invention uses a nested pickling solution to transport, and the nested pickling solution refers to that each injection port is a double-layer injection port, which includes a circular The outer jet port and the inner jet port are provided, the inner jet port is nested in the outer jet port, the inner jet port is connected with the pickling liquid delivery pipe, and the outer jet port is connected with the diluent delivery pipe. The diluent here is tap water or pure water, and the pickling solution delivery pipe is made of polytetrafluoroethylene or other corrosion-resistant materials. The advantage of this embodiment is that after the location of the target area is determined, the inner injection port can be activated to clean the target oxide. The pickling solution here uses medium or medium-high concentration hydrochloric acid, such as 20-40% hydrochloric acid, and the inner injection After the nozzle is activated, delay the diluent injection for 1-2 seconds or the pickling solution and the diluent are sprayed simultaneously, so that the action area of the pickling solution is concentrated in the target area. Once the hydrochloric acid diffuses from the target area to the non-target area, the surrounding The diluent will dilute and rinse the strong acid, avoiding excessive effects on other areas. In addition, another advantage of this implementation is that since hydrochloric acid is a volatile substance, although medium and high concentration hydrochloric acid can better clean the stubborn oxide residues on the surface of the steel plate with the help of spray force, it is also easy to volatilize into the air, while With the technical solution of the present invention, hydrochloric acid is sprayed from the middle of the injection port, and water is sprayed from the surrounding spray ports, and the volatilized hydrochloric acid is absorbed by the water immediately, reducing the volatilization of hydrochloric acid in the air and preventing workers from being harmed.

Working mode 1: when the pickling machine is working, the steel plate is placed on the conveying device 21, which is conveyed forward by the conveying device, and when it reaches the bottom of the image acquisition device 22, the image acquisition device 22 performs image acquisition on the steel plate within the predetermined range below, and the image acquisition After the image obtained by the device is subjected to spot recognition or differential processing, the coordinates of the residual oxide area on the steel plate are obtained (the abscissa corresponds to the width direction of the steel plate, and the ordinate corresponds to the length direction of the steel plate), and the controller 23 is based on the moving speed of the steel plate and the image acquisition device The distance between the camera area and the most front injection port is used to determine the time when the stain reaches the bottom of the spray port. Once the stain reaches the bottom of the most front spray port, the spray type supplementary pickling equipment 24 controls the most front spray port to carry out pickling liquid and diluent at the same time. Spraying, the pickling liquid performs high-pressure spraying acid etching on the stains, and the diluent ensures that the medium and high concentration of hydrochloric acid will not corrode the steel plate in the surrounding area and continue to move forward. The nozzle is activated, and finally the second part of the nozzle is used to clean the steel plate. The pickling liquid storage device 25 and the diluent storage device 26 respectively pressurize and supply the corresponding liquid through the pressurizing device.

According to the quality requirements of the steel plate, targeted pickling can be carried out on one or both sides of the steel plate.

Working mode 2: when the pickling machine is working, the steel plate is placed on the conveying device 21, which is conveyed forward by the conveying device, and when it reaches the bottom of the image acquisition device 22, it stays for 0.1-0.2 seconds, and the image acquisition device 22 pairs the steel plates within the predetermined range below Carry out image acquisition, after the image acquired by the image acquisition device undergoes stain recognition or differential processing, the coordinates of the residual oxide area on the steel plate are obtained (the abscissa corresponds to the width direction of the steel plate, and the ordinate corresponds to the length direction of the steel plate), the steel plate continues to be transmitted, and the photographed The area is sent to the bottom of the spraying area and stays for a predetermined time. The controller 23 starts the spraying port corresponding to the stained area based on the corresponding relationship between the stain position and the image acquisition area, and the spraying supplementary pickling equipment 24 controls the frontmost spraying port to carry out pickling The pickling solution and the diluent are sprayed at the same time, the pickling solution is used for high-pressure jet etching of the stain, and the diluent ensures that the medium and high concentration hydrochloric acid will not corrode the surrounding area. In fact, the initial washing can remove most of the oxides on the steel plate, and only a few areas will have residual oxide stains. Therefore, the pickling is only required when the image acquisition device finds that there are stains in the shooting area.

Example 3

Although the cold-rolled steel sheet preparation equipment in the above embodiments can produce cold-rolled sheets with a smooth and uniform surface through two rough rolling and two fine rolling procedures.

However, the applicant found that during the cold-rolling process of thick plates, when the cold-rolling equipment cold-rolls the steel plate, due to the large deformation of the steel plate, there will be residual stress in the steel plate during the deformation process, and, in During the deformation process of the steel plate, there will be a trend propagation effect. This trend propagation effect refers to that during the rolling process of the steel plate through the rolls, if for some reason the deformation of a part is larger than that of the surrounding area, it will lead to the deformation of the part. Extrusion is formed on the surrounding parts, and this extrusion will bring a series of chain reactions. The distance of its propagation is much greater than people's expectations, and it will accumulate to a certain extent, making it difficult to eliminate the stress in the steel plate.

Therefore, in response to this problem, the applicant has conducted a large number of experimental studies, and the applicant has found that the root cause of the residual stress in the steel plate is that the stress it receives cannot be completely transformed into deformation during the deformation process, that is, it is subjected to The power cannot be fully released.

In order to further release the stress in the steel plate, in this embodiment, the applicant pre-treated the base material on the hot-rolled coil, specifically, the cold-rolling equipment in this embodiment except the The uncoiling device 1 (because it is a thick plate, in this embodiment, the uncoiling device 1 is not used, but the steel plate conveying device 1 is used), the first tension driving roll 2, the first rough rolling roll 3, the second rough rolling roll 4, the second rough rolling roll In addition to the three finishing rolls 5, the fourth finishing roll 6, the second tension driving roll 7, and the third follow-up speed measuring roll 8, it also includes: pre-processing equipment, which includes a hot rolling mill and a punching machine or a notch machine, the hot-rolling mill performs hot-rolling on hot-rolled steel sheets, and during the hot-rolling process or before the end of the last round of hot-rolling, the punching machine or notching machine punches or cuts the edges of the hot-rolled steel sheets, from The edge of the steel plate is punched or cut with notches of a predetermined depth at predetermined intervals. Preferably, the notch is a half-pear-shaped notch, which means that one end of the notch is larger than the other end, and the larger end is located at the cold Rolling plate upstream.

In addition, the depth of the notch is smaller than the width of the subsequent cut edge. Therefore, in this embodiment, after the cold rolling is completed, it is necessary to use an edge trimmer to trim the steel plate. The cut edge width is greater than the depth of the formed notch.

Taking the SPCC cold-rolled steel plate with a thickness of 6 mm and a width of 1500 mm as an example, the cold-rolled steel plate made by the equipment in Example 1 of the same thickness and the cold-rolled steel plate in this embodiment are compared with the cold-rolled steel plate in this embodiment by a stress tester, and it is found that in the middle area 300-500mm, the difference in internal stress is small, but as it approaches to the edge, the residual stress of the steel plate in this embodiment is significantly smaller than that of the steel plate in embodiment 1, taking the central axis as the reference, 300mm away from the central axis , the stress is 10-15% lower than that of Example 1, and when the distance from the central axis is 500-600mm, the residual stress is 25-30% lower than that of Example 1.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications made to the above embodiments according to the technical essence of the present invention are within the spirit and principles of the present invention. , equivalent changes and modifications all still fall within the protection scope of the present invention.

Although the principle of the present invention has been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are only explanations for the exemplary implementation of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation to the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solutions of the present invention fall within the scope of the present invention. within the scope of protection.

Claims (6)

1. A method for preparing a cold-rolled steel plate for high-end equipment manufacturing, characterized in that the method comprises: uncoiling the target plate body or transporting it to the first tension drive roller through a conveying device; Transporting the target plate body to the first rough roll through the first rough roll for rough rolling; Carrying out secondary rough rolling to the target plate body by using the second rough rolling roll; Using the first finishing roll to finish rolling the target plate body; The second finishing roll is used to perform secondary finish rolling on the target plate body, wherein the surface roughness of the first and second finishing rolls is smaller than that of the first and second rough rolling rolls. 2. The method according to claim 1, characterized in that the method further comprises pickling the target plate body with a pickling machine before cold rolling. 3. The method according to claim 1, characterized in that, the method further comprises measuring the exit speed and distance of the cold-rolled strip output from the fourth finishing roll by using a follower speed measuring roll. 4. The method according to claim 1, characterized in that, the method adopts cold-rolled steel plate preparation equipment to realize, and the cold-rolled steel plate preparation equipment comprises: uncoiling device (1), the first tension driving roll (2), The first rough roll (3), the second rough roll (4), the third finish roll (5), the fourth finish roll (6), the second tension drive roll (7) and the third follower speed measuring roll (8) . 5. The method according to claim 4, characterized in that each of the first roughing roll (3), the second roughing roll (4), the third finishing roll (5) and the fourth finishing roll (6) Each includes two upper and lower rollers, and the two rollers are opposite to each other; each of the first tension driving roller (2), the second tension driving roller (7) and the third follow-up speed measuring roller (8) includes upper and lower rollers. A driving roller is used to ensure the transmission driving force of the steel plate. 6. The method of claim 5, wherein, The uncoiling device (1) is used to receive the hot-rolled coil output by the hot-rolling program, and unwind and transport the steel plate on the hot-rolled coil to the upper and lower driving rolls of the first tension driving roll (2). between; The first tension driving roller (2) is driven by a motor, and the hot-rolled steel plate pushed by the upper and lower driving rollers is sent to between the upper and lower rollers of the first rough rolling roller (3); The first rough roll (3) cold-rolls the steel plate with a first predetermined reduction or reduction rate; The second rough rolling roll (4) is located at the downstream of the first rough rolling roll (3), receives the steel plate after the first round of cold rolling for further rolling, and the distance between the upper and lower rolls of the second rough rolling roll (4) is less than The spacing between the upper and lower rolls of the first rough roll (3); The second tension driving roll (7) is arranged between the second rough rolling roll (4) and the first thin rolling roll, and the smoothness of steel plate transmission is ensured by applying a driving force here; The third fine rolling roll (5) and the fourth fine rolling roll (6) are arranged downstream of the second tension driving roll (7), and the two are respectively used for fine rolling the rough rolled steel plate; The third follow-up speed-measuring roll (8) is arranged downstream of the fourth fine rolling roll (6), and is used for measuring the speed and length of the cold-rolled steel plate.